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.
70 JH/01 Remove code calling the customisable local_scan function, unless a new
71 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
73 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
74 non-signal-safe functions being used.
76 JH/03 Bug 2269: When presented with a received message having a stupidly large
77 number of DKIM-Signature headers, disable DKIM verification to avoid
78 a resource-consumption attack. The limit is set at twenty.
80 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
81 report of oldest_pass in ${authres } in consequence, and separate out
82 some descriptions of reasons for verification fail.
84 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
85 files in the spool were present and unlocked. A queue-runner could spot
86 them, resulting in a duplicate delivery. Fix that by doing the unlock
87 after the unlink. Investigation by Tim Stewart. Take the opportunity to
88 add more error-checking on spoolfile handling while that code is being
91 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
92 No known attacks, no CVE, this is defensive hardening.
94 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
95 a queue-runner could start a delivery while other operations were ongoing.
96 Cutthrough delivery was a common victim, resulting in duplicate delivery.
97 Found and investigated by Tim Stewart. Fix by using the open message data
98 file handle rather than opening another, and not locally closing it (which
99 releases a lock) for that case, while creating the temporary .eml format
100 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
102 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
103 $sender_verify_failure/$recipient_verify_failure to "random".
105 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
108 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
109 Previously this would segfault.
111 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
114 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
115 like zero, since the resolver should be doing this for us, But we need one
116 as a CNAME but no MX presence gets the CNAME returned; we need to check
117 that doesn't point to an MX to declare it "no MX returned" rather than
118 "error, loop". A new main option is added so the older capability of
119 following some limited number of chain links is maintained.
121 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
123 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
124 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
125 now-deprecated earlier definitions used only specified the range up to TLS
126 1.2 (in the older-version library docs).
128 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
130 JH/15 Rework TLS client-side context management. Stop using a global, and
131 explicitly pass a context around. This enables future use of TLS for
132 connections to service-daemons (eg. malware scanning) while a client smtp
133 connection is using TLS; with cutthrough connections this is quite likely.
135 JH/16 Fix ARC verification to do AS checks in reverse order.
137 JH/17 Support a "tls" option on the ${readsocket } expansion item.
139 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
140 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
141 Previously the "utf8" would be re-prepended for every additional message.
143 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
144 Previously thery were accepted, resulting in issues when attempting to
145 forward messages to a non-supporting MTA.
147 PP/02 Let -n work with printing macros too, not just options.
149 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
150 one parent address was copied, and bogus data was used at delivery-logging
151 time. Either a crash (after delivery) or bogus log data could result.
152 Discovery and analysis by Tim Stewart.
154 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
155 Previously if the string ended mid-character, we did not insert the
156 promised '?' replacement.
158 PP/04 Documentation: current string operators work on bytes, not codepoints.
160 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
161 should pack well giving a smaller memory footprint so better caching and
162 therefore performance. Group the declarations where this can't be done so
163 that the byte-sized flag variables are not interspersed among pointer
164 variables, giving a better chance of good packing by the compiler.
166 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
167 non-null, to avoid issues with sites running BATV. Previously reports were
168 sent with an empty envelope sender so looked like bounces.
170 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
171 The ignore_error flag wasn't being returned from the filter subprocess so
172 was not set for later routers. Investigation and fix by Matthias Kurz.
174 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
175 and a msg:complete for the whole, when a message is manually removed using
176 -Mrm. Developement by Matthias Kurz, hacked on by JH.
178 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
179 a "Gnu special" function, asprintf() in the DB utility binary builds; I
180 hope that is portable enough.
182 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
183 requiring a known-CA anchor certificate; make it now rely entirely on the
184 TLSA as an anchor. Checking the name on the leaf cert against the name
185 on the A-record for the host is still done for TA (but not for EE mode).
187 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
188 included in delivery lines for non-proxied connections, when compiled with
189 SUPPORT_SOCKS and running with proxy logging enabled.
191 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
192 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
193 move the existing event to fire before the normal logging of message
194 failure so that custom logging is bracketed by normal logging.
196 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
197 msg:fail:internal event. Developement by Matthias Kurz.
199 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
200 far too small for todays use of crypto signatures stored there. Go all
201 the way to the max DNS message size of 64kB, even though this might be
202 overmuch for IOT constrained device use.
204 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
205 copy a string over itself. The library routine is documented as not
206 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
208 JH/32 For main options check_spool_space and check_inode_space, where the
209 platform supports 64b integers, support more than the previous 2^31 kB
210 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
211 the previous G, M, k.
213 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
214 $authenticated_fail_id variable on authentication failure. Previously
217 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
218 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
219 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
220 GNUTLS_SEC_PARAM_MEDIUM.
222 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
223 side. Previously we would continue as if no SNI had been received.
225 JH/36 Harden the handling of string-lists. When a list consisted of a sole
226 "<" character, which should be a list-separator specification, we walked
227 off past the nul-terimation.
229 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
230 causes) even when the retry time is not yet met. Previously they were
231 not, meaning that when (say) an account was over-quota and temp-rejecting,
232 and multiple senders' messages were queued, only one sender would get
233 notified on each configured delay_warning cycle.
235 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
237 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
238 cipher-suites, an error can be left on the stack even for a succeeding
239 accept; this results in impossible error messages when a later operation
242 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
243 return error codes indicating retry. Under TLS1.3 this becomes required.
245 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
246 it only wrote the new authenticators, resulting in a lack of tracking of
247 peer changes of ESMTP extensions until the next cache flush.
249 JH/41 Fix the loop reading a message header line to check for integer overflow,
250 and more-often against header_maxsize. Previously a crafted message could
251 induce a crash of the recive process; now the message is cleanly rejected.
253 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
254 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
260 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
261 When redis_servers is set to a list of > 1 element, and the Redis servers
262 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
263 case of MOVED into a DEFER case instead, thus moving the query onto the
264 next server in the list. For a cluster of N elements, all N servers must
265 be defined in redis_servers.
267 GF/02 Catch and remove uninitialized value warning in exiqsumm
268 Check for existence of @ARGV before looking at $ARGV[0]
270 JH/01 Replace the store_release() internal interface with store_newblock(),
271 which internalises the check required to safely use the old one, plus
272 the allocate and data copy operations duplicated in both (!) of the
273 extant use locations.
275 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
276 modifier. This matches the restriction on the commandline.
278 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
279 Previously only the last row was returned.
281 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
282 we assumed that tags in the header were well-formed, and parsed the
283 element content after inspecting only the first char of the tag.
284 Assumptions at that stage could crash the receive process on malformed
287 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
288 While running the DKIM ACL we operate on the Permanent memory pool so that
289 variables created with "set" persist to the DATA ACL. Also (at any time)
290 DNS lookups that fail create cache records using the Permanent pool. But
291 expansions release any allocations made on the current pool - so a dnsdb
292 lookup expansion done in the DKIM ACL releases the memory used for the
293 DNS negative-cache, and bad things result. Solution is to switch to the
294 Main pool for expansions.
295 While we're in that code, add checks on the DNS cache during store_reset,
296 active in the testsuite.
297 Problem spotted, and debugging aided, by Wolfgang Breyha.
299 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
300 When none of the hosts presented to a transport match an already-open
301 connection, close it and proceed with the list. Previously we would
302 queue the message. Spotted by Lena with Yahoo, probably involving
305 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
306 Previously a spurious "250 OK id=" response was appended to the proper
309 JH/08 The "support for" informational output now, which built with Content
310 Scanning support, has a line for the malware scanner interfaces compiled
311 in. Interface can be individually included or not at build time.
313 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
314 by the template makefile "src/EDITME". The "STREAM" support for an older
315 ClamAV interface method is removed.
317 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
318 rows affected is given instead).
320 JH/11 The runtime Berkeley DB library version is now additionally output by
321 "exim -d -bV". Previously only the compile-time version was shown.
323 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
324 SMTP connection. Previously, when one had more receipients than the
325 first, an abortive onward connection was made. Move to full support for
326 multiple onward connections in sequence, handling cutthrough connection
327 for all multi-message initiating connections.
329 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
330 routers. Previously, a multi-recipient message would fail to match the
331 onward-connection opened for the first recipient, and cause its closure.
333 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
334 a timeout on read on a GnuTLS initiating connection, resulting in the
335 initiating connection being dropped. This mattered most when the callout
336 was marked defer_ok. Fix to keep the two timeout-detection methods
339 JH/15 Relax results from ACL control request to enable cutthrough, in
340 unsupported situations, from error to silently (except under debug)
341 ignoring. This covers use with PRDR, frozen messages, queue-only and
344 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
346 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
347 metadata, resulting in a crash in free().
349 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
350 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
351 Broken also in d185889f4, with init system revamp.
353 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
354 Previously we abruptly closed the connection after reading a malware-
355 found indication; now we go on to read the "scan ok" response line,
358 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
359 ACL. Previously, a crash would result.
361 JH/19 Speed up macro lookups during configuration file read, by skipping non-
362 macro text after a replacement (previously it was only once per line) and
363 by skipping builtin macros when searching for an uppercase lead character.
365 JH/20 DANE support moved from Experimental to mainline. The Makefile control
366 for the build is renamed.
368 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
369 was allocated for every new TLS startup, meaning one per message. Fix
370 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
372 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
373 reported the original. Fix to report (as far as possible) the ACL
374 result replacing the original.
376 JH/23 Fix memory leak during multi-message connections using STARTTLS under
377 OpenSSL. Certificate information is loaded for every new TLS startup,
378 and the resources needed to be freed.
380 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
382 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
385 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
386 DATA response info to the (existing) per-recipient response info for
387 the "C=" log element. It can have useful tracking info from the
388 destination system. Patch from Simon Arlott.
390 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
391 length value. Previously this would segfault.
393 HS/02 Support Avast multiline protoocol, this allows passing flags to
394 newer versions of the scanner.
396 JH/28 Ensure that variables possibly set during message acceptance are marked
397 dead before release of memory in the daemon loop. This stops complaints
398 about them when the debug_store option is enabled. Discovered specifically
399 for sender_rate_period, but applies to a whole set of variables.
400 Do the same for the queue-runner and queue-list loops, for variables set
401 from spool message files. Do the same for the SMTP per-message loop, for
402 certain variables indirectly set in ACL operations.
404 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
405 as a multi-recipient message from a mailinglist manager). The coding had
406 an arbitrary cutoff number of characters while checking for more input;
407 enforced by writing a NUL into the buffer. This corrupted long / fast
408 input. The problem was exposed more widely when more pipelineing of SMTP
409 responses was introduced, and one Exim system was feeding another.
410 The symptom is log complaints of SMTP syntax error (NUL chars) on the
411 receiving system, and refused recipients seen by the sending system
412 (propating to people being dropped from mailing lists).
413 Discovered and pinpointed by David Carter.
415 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
416 replaced by the ${authresults } expansion.
418 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
420 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
421 allows proper process termination in container environments.
423 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
424 Previously the "final dot" had a newline after it; ensure it is CR,LF.
426 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
427 and "err_perm", deprecated since 4.83 when the RFC-defined words
428 "temperror" and "permerror" were introduced.
430 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
431 transport-filters or DKIM-signing. The restriction was lost in the
432 consolidation of verify-callout and delivery SMTP handling.
433 Extend the restriction to also cover ARC-signing.
435 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
436 in defer=pass mode supply a 450 to the initiator. Previously the message
439 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
440 tls_require_ciphers is used as before.
442 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
443 "pass_unscanned". Only tmpfails from the scanner are written to
444 the paniclog, as they may require admin intervention (permission
445 denied, license issues). Other scanner errors (like decompression
446 bombs) do not cause a paniclog entry.
448 JH/36 Fix reinitialisation of DKIM logging variable between messages.
449 Previously it was possible to log spurious information in receive log
452 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
453 triggered odd behaviour from Outlook Express clients.
455 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
458 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
459 since the IETF WG has not yet settled on that versus the original
460 "bare" representation.
462 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
463 Previously the millisecond value corrupted the output.
464 Fix also for syslog_pid=no and log_selector +pid, for which the pid
465 corrupted the output.
471 JH/01 Rework error string handling in TLS interface so that the caller in
472 more cases is responsible for logging. This permits library-sourced
473 string to be attached to addresses during delivery, and collapses
474 pairs of long lines into single ones.
476 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
477 during configuration. Wildcards are allowed and expanded.
479 JH/02 Rework error string handling in DKIM to pass more info back to callers.
480 This permits better logging.
482 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
483 do not close it down and have the child transport start it up again on
484 the passed-on TCP connection. Instead, proxy the child (and any
485 subsequent ones) for TLS via a unix-domain socket channel. Logging is
486 affected: the continued delivery log lines do not have any DNSSEC, TLS
487 Certificate or OCSP information. TLS cipher information is still logged.
489 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
490 identical IP addresses on different listening ports. Will also affect
493 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
494 add noisy ifdef guards to special-case this sillyness.
495 Patch from Bernd Kuhls.
497 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
498 than 255 are no longer allowed.
500 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
501 Disable the session-cache too, which might reduce our load. Since we
502 currrectly use a new context for every connection, both as server and
503 client, there is no benefit for these.
504 GnuTLS appears to not support tickets server-side by default (we don't
505 call gnutls_session_ticket_enable_server()) but client side is enabled
506 by default on recent versions (3.1.3 +) unless the PFS priority string
509 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
510 <https://reproducible-builds.org/specs/source-date-epoch/>.
512 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
513 the check for any unsuccessful recipients did not notice the limit, and
514 erroneously found still-pending ones.
516 JH/08 Pipeline CHUNKING command and data together, on kernels that support
517 MSG_MORE. Only in-clear (not on TLS connections).
519 JH/09 Avoid using a temporary file during transport using dkim. Unless a
520 transport-filter is involved we can buffer the headers in memory for
521 creating the signature, and read the spool data file once for the
522 signature and again for transmission.
524 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
525 4.77 as the kernel support then wasn't solid, having issues in 64bit
526 mode. Now, it's been long enough. Add support for FreeBSD also.
528 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
529 case where the routing stage had gathered several addresses to send to
530 a host before calling the transport for the first, we previously failed
531 to close down TLS in the old transport process before passing the TCP
532 connection to the new process. The new one sent a STARTTLS command
533 which naturally failed, giving a failed delivery and bloating the retry
534 database. Investigation and fix prototype from Wolfgang Breyha.
536 JH/12 Fix check on SMTP command input synchronisation. Previously there were
537 false-negatives in the check that the sender had not preempted a response
538 or prompt from Exim (running as a server), due to that code's lack of
539 awareness of the SMTP input buffering.
541 PP/04 Add commandline_checks_require_admin option.
542 Exim drops privileges sanely, various checks such as -be aren't a
543 security problem, as long as you trust local users with access to their
544 own account. When invoked by services which pass untrusted data to
545 Exim, this might be an issue. Set this option in main configuration
546 AND make fixes to the calling application, such as using `--` to stop
549 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
550 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
551 responses to those, into a single TLS record each way (this usually means
552 a single packet). As a side issue, smtp_enforce_sync now works on TLS
555 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
556 affects you only if you're dancing at the edge of the param size limits.
557 If you are, and this message makes sense to you, then: raise the
558 configured limit or use OpenSSL 1.1. Nothing we can do for older
561 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
562 cmdline element to get the documented default one. Previously it was
565 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
566 are unsuable for non-message-specific reasons - eg. connection timeout,
567 banner-time rejection.
569 JH/16 Fix logging of delivery remote port, when specified by router, under
572 PP/06 Repair manualroute's ability to take options in any order, even if one
573 is the name of a transport.
576 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
578 JH/17 Change the list-building routines interface to use the expanding-string
579 triplet model, for better allocation and copying behaviour.
581 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
582 Previously it was constructed the first time a possibly-matching string
583 was met in the configuration file input during startup; now it is done
586 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
587 compatible one, to avoid the (poorly documented) possibility of a config
588 file in the working directory redirecting the DB files, possibly correpting
589 some existing file. CVE-2017-10140 assigned for BDB.
591 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
592 cache-hot. Previously, although the result was properly cached, the
593 initial verify call returned a defer.
595 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
596 the main verify for receipient in uncached-mode.
598 JH/22 Retire historical build files to an "unsupported" subdir. These are
599 defined as "ones for which we have no current evidence of testing".
601 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
602 if present. Previously it was ignored.
604 JH/24 Start using specified-initialisers in C structure init coding. This is
605 a C99 feature (it's 2017, so now considered safe).
607 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
608 if was a fixed-sized field and bitmask ops via macros; it is now more
611 PP/07 GitHub PR 56: Apply MariaDB build fix.
612 Patch provided by Jaroslav Škarvada.
614 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
615 during Coverity cleanups [4.87 JH/47]
616 Diagnosis and fix provided by Michael Fischer v. Mollard.
618 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
619 the right size to place the terminating semicolon on its own folded
620 line, the header hash was calculated to an incorrect value thanks to
621 the (relaxed) space the fold became.
623 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
624 and confused the parent.
626 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
627 which could crash as a result. This could lead to undeliverable messages.
629 JH/28 Logging: "next input sent too soon" now shows where input was truncated
632 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
633 matters on fast-turnover and PID-randomising systems, which were getting
634 out-of-order delivery.
636 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
637 a possibly-overlapping copy. The symptom was that "Remote host closed
638 connection in response to HELO" was logged instead of the actual 4xx
641 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
642 Previously only that bufferd was discarded, resulting in SYMTP command
645 JH/32 DKIM: when a message has multiple signatures matching an identity given
646 in dkim_verify_signers, run the dkim acl once for each. Previously only
647 one run was done. Bug 2189.
649 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
650 "panic the current process" to "deliberately defer". The panic log is
651 still written with the problem list name; the mail and reject logs now
652 get a temp-reject line for the message that was being handled, saying
653 something like "domains check lookup or other defer". The SMTP 451
654 message is still "Temporary local problem".
656 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
657 A crafted sequence of BDAT commands could result in in-use memory beeing
658 freed. CVE-2017-16943.
660 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
661 from SMTP input. Previously it was always done; now only done for DATA
662 and not BDAT commands. CVE-2017-16944.
664 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
665 to the message (such as an overlong header line). Previously this was
666 not done and we did not exit BDAT mode. Followon from the previous item
667 though a different problem.
673 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
674 than -2003 did; needs libidn2 in addition to libidn.
676 JH/02 The path option on a pipe transport is now expanded before use.
678 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
679 Patch provided by "Björn", documentation fix added too.
681 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
682 missing a wire-to-host endian conversion.
684 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
685 close after a BDAT command line could be taken as a following command,
686 giving a synch failure. Fix by only checking for synch immediately
687 before acknowledging the chunk.
689 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
690 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
691 macro. Patches provided by Josh Soref.
693 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
694 Previously we did not; the RFC seems ambiguous and VRFY is not listed
695 by IANA as a service extension. However, John Klensin suggests that we
698 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
699 the dkim code may be unix-mode line endings rather than smtp wire-format
700 CRLF, so prepend a CR to any bare LF.
702 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
703 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
705 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
706 the first were themselves being wrongly included in the feed into dkim
707 processing; with most chunk sizes in use this resulted in an incorrect
708 body hash calculated value.
710 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
711 DKIM signature block, for verification. Although advised against by
712 standards it is specifically not ruled illegal.
714 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
716 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
717 missing a body hash (the bh= tag).
719 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
720 It seems that HAProxy sends the Proxy Protocol information in clear and
721 only then does a TLS startup, so do the same.
723 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
724 TCP connections (such as for Spamd) unless the daemon successfully set
725 Fast Open mode on its listening sockets. This fixes breakage seen on
726 too-old kernels or those not configured for Fast Open, at the cost of
727 requiring both directions being enabled for TFO, and TFO never being used
728 by non-daemon-related Exim processes.
730 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
731 endings, at least on the first header line. Try to canonify any that get
732 past that check, despite the cost.
734 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
735 now limited to an arbitrary five deep, while parsing addresses with the
736 strip_excess_angle_brackets option enabled.
738 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
739 instead leave the unprompted TLS handshake in socket buffer for the
740 TLS library to consume.
742 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
744 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
746 JH/16 Drop variables when they go out of scope. Memory management drops a whole
747 region in one operation, for speed, and this leaves assigned pointers
748 dangling. Add checks run only under the testsuite which checks all
749 variables at a store-reset and panics on a dangling pointer; add code
750 explicitly nulling out all the variables discovered. Fixes one known
751 bug: a transport crash, where a dangling pointer for $sending_ip_address
752 originally assigned in a verify callout, is re-used.
754 PP/06 Drop '.' from @INC in various Perl scripts.
756 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
758 PP/08 Reduce a number of compilation warnings under clang; building with
759 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
760 should be warning-free.
762 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
764 HS/01 Fix portability problems introduced by PP/08 for platforms where
765 realloc(NULL) is not equivalent to malloc() [SunOS et al].
767 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
768 chunk. This allows us to accept broken chunked messages. We need a more
769 general solution here.
771 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
772 already-broken messages in the queue.
774 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
776 JH/19 Fix reference counting bug in routing-generated-address tracking.
782 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
783 supports it and a size is available (ie. the sending peer gave us one).
785 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
786 years of being deprecated). The replacements are the ACLs
787 acl_smtp_mime and acl_not_smtp_mime.
789 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
790 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
791 or even an in-clear connection were permitted. Now, if the host lookup
792 was dnssec and dane was requested then the host is only used if the
793 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
794 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
795 if one fails this test.
796 This means that a poorly-configured remote DNS will make it incommunicado;
797 but it protects against a DNS-interception attack on it.
799 JH/04 Bug 1810: make continued-use of an open smtp transport connection
800 non-noisy when a race steals the message being considered.
802 JH/05 If main configuration option tls_certificate is unset, generate a
803 self-signed certificate for inbound TLS connections.
805 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
806 in rewrites and routers.
808 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
809 and logged a warning sing 4.83; now they are a configuration file error.
811 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
812 (lacking @domain). Apply the same qualification processing as RCPT.
814 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
816 JH/10 Support ${sha256:} applied to a string (as well as the previous
819 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
820 a cutthrough deliver is pending, as we always want to make a connection.
821 This also avoids re-routing the message when later placing the cutthrough
822 connection after a verify cache hit.
823 Do not update it with the verify result either.
825 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
826 when routing results in more than one destination address.
828 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
829 signing (which inhibits the cutthrough capability). Previously only
830 the presence of an option was tested; now an expansion evaluating as
831 empty is permissible (obviously it should depend only on data available
832 when the cutthrough connection is made).
834 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
835 the relevant preceding SMTP command did not note the pipelining mode.
837 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
838 Previously they were not counted.
840 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
841 as one having no matching records. Previously we deferred the message
842 that needed the lookup.
844 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
845 distinguished as "(=".
847 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
848 for missing MX records. Previously it only worked for missing A records.
850 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
852 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
853 after the data-go-ahead and data-ack. Patch from Jason Betts.
855 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
856 even for a "none" policy. Patch from Tony Meyer.
858 JH/22 Fix continued use of a connection for further deliveries. If a port was
859 specified by a router, it must also match for the delivery to be
862 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
863 When one of the recipients of a message was unsuitable for the connection
864 (has no matching addresses), we lost track of needing to mark it
865 deferred. As a result mail would be lost.
867 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
869 JH/25 Decoding ACL controls is now done using a binary search; the source code
870 takes up less space and should be simpler to maintain. Merge the ACL
871 condition decode tables also, with similar effect.
873 JH/26 Fix problem with one_time used on a redirect router which returned the
874 parent address unchanged. A retry would see the parent address marked as
875 delivered, so not attempt the (identical) child. As a result mail would
878 JH/27 Fix a possible security hole, wherein a process operating with the Exim
879 UID can gain a root shell. Credit to http://www.halfdog.net/ for
880 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
883 JH/28 Enable {spool,log} filesystem space and inode checks as default.
884 Main config options check_{log,spool}_{inodes,space} are now
885 100 inodes, 10MB unless set otherwise in the configuration.
887 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
888 Previously it only applied to the main-section connection policy
891 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
893 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
894 by me. Added RFC7919 DH primes as an alternative.
896 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
897 are not in the system include path.
899 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
900 GnuTLS, when a session startup failed (eg because the client disconnected)
901 Exim did stdio operations after fclose. This was exposed by a recent
902 change which nulled out the file handle after the fclose.
904 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
905 signed directly by the cert-signing cert, rather than an intermediate
906 OCSP-signing cert. This is the model used by LetsEncrypt.
908 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
910 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
911 an incoming connection.
913 HS/02 Bug 1802: Do not half-close the connection after sending a request
916 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
917 fallback to "prime256v1".
919 JH/34 SECURITY: Use proper copy of DATA command in error message.
920 Could leak key material. Remotely exploitable. CVE-2016-9963.
926 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
927 and 3.4.4 - once the server is enabled to respond to an OCSP request
928 it does even when not requested, resulting in a stapling non-aware
929 client dropping the TLS connection.
931 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
932 support variable-length bit vectors. No functional change.
934 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
935 The I= interface field on outgoing lines is now after the H= remote
936 host field, same as incoming lines. There is a separate
937 outgoing_interface log selector which allows you to disable the
940 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
941 If not running log_selector +smtp_connection the mainlog would be held
942 open indefinitely after a "too many connections" event, including to a
943 deleted file after a log rotate. Leave the per net connection logging
944 leaving it open for efficiency as that will be quickly detected by the
945 check on the next write.
947 HS/01 Bug 1671: Fix post transport crash.
948 Processing the wait-<transport> messages could crash the delivery
949 process if the message IDs didn't exist for some reason. When
950 using 'split_spool_directory=yes' the construction of the spool
951 file name failed already, exposing the same netto behaviour.
953 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
954 mime_regex ACL conditions.
956 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
957 to DSN fail messages (bounces): remote IP, remote greeting, remote response
958 to HELO, local diagnostic string.
960 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
961 log line to debug. Even when configured with a tls authenticator many
962 client connections are expected to not authenticate in this way, so
963 an authenticate fail is not an error.
965 HS/02 Add the Exim version string to the process info. This way exiwhat
966 gives some more detail about the running daemon.
968 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
969 matter for fast-change records such as DNSBLs.
971 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
972 retry record, even if constant. There may be multiple transports with
973 different interface settings and the retry behaviour needs to be kept
976 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
978 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
980 JH/10 Bug 840: fix log_defer_output option of pipe transport
982 JH/11 Bug 830: use same host for all RCPTS of a message, even under
983 hosts_randomize. This matters a lot when combined with mua_wrapper.
985 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
986 ${quote_pgsql:<string>} operator.
988 JH/13 Bug 1708: avoid misaligned access in cached lookup.
990 JH/14 Change header file name for freeradius-client. Relevant if compiling
991 with Radius support; from the Gentoo tree and checked under Fedora.
993 JH/15 Bug 1712: Introduce $prdr_requested flag variable
995 JH/16 Bug 1714: Permit an empty string as expansion result for transport
996 option transport_filter, meaning no filtering.
998 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1000 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1001 defaults to "*" (all hosts). The variable is now available when not built
1002 with TLS, default unset, mainly to enable keeping the testsuite sane.
1003 If a server certificate is not supplied (via tls_certificate) an error is
1004 logged, and clients will find TLS connections fail on startup. Presumably
1005 they will retry in-clear.
1006 Packagers of Exim are strongly encouraged to create a server certificate
1007 at installation time.
1009 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1010 with the $config_file variable.
1012 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1013 in transport context, after the attempt, and per-recipient. The latter type
1014 is per host attempted. The event data is the error message, and the errno
1015 information encodes the lookup type (A vs. MX) used for the (first) host,
1016 and the trailing two digits of the smtp 4xx response.
1018 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1019 to write to mainlog (or rejectlog, paniclog) in the window between file
1020 creation and permissions/ownership being changed. Particularly affects
1021 installations where exicyclog is run as root, rather than exim user;
1022 result is that the running daemon panics and dies.
1024 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1026 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1027 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1028 "pri" and "weight". Note that the previous implicit priority given by the
1029 list order is no longer honoured.
1031 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1032 for DKIM processing.
1034 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1035 by defining SUPPORT_SOCKS.
1037 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1038 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1039 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1040 variables are renamed to proxy_{local,external}_{address,port}.
1042 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1043 for a build by defining SUPPORT_I18N
1045 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1046 of the query string, and make ${quote_redis:} do that quoting.
1048 JH/29 Move Events support from Experimental to mainline, enabled by default
1049 and removable for a build by defining DISABLE_EVENT.
1051 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1053 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1054 cached by the daemon.
1056 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1057 by defining LOOKUP_REDIS. The libhiredis library is required.
1059 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1060 keys are given for lookup.
1062 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1063 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1064 only supported when built with TLS support. The PolarSSL SHA routines
1065 are still used when the TLS library is too old for convenient support.
1067 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1068 openssl_options), for security. OpenSSL forces this from version 1.1.0
1069 server-side so match that on older versions.
1071 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1072 allocation for $value could be released as the expansion processing
1073 concluded, but leaving the global pointer active for it.
1075 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1076 and to use the domains and local_parts ACL conditions.
1078 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1079 incorrectly not doubled on cutthrough transmission, hence seen as a
1080 body-termination at the receiving system - resulting in truncated mails.
1081 Commonly the sender saw a TCP-level error, and retransmitted the message
1082 via the normal store-and-forward channel. This could result in duplicates
1083 received - but deduplicating mailstores were liable to retain only the
1084 initial truncated version.
1086 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1088 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1090 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1091 we're in there, support oversigning also; bug 1309.
1093 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1095 HS/04 Add support for keep_environment and add_environment options.
1097 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1098 either intentional arithmetic overflow during PRNG, or testing config-
1101 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1102 delivery resulted in actual delivery. Cancel cutthrough before DATA
1105 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1106 rejects a recipient: pass the reject to the originator.
1108 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1109 Many were false-positives and ignorable, but it's worth fixing the
1112 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1113 for the new environment-manipulation done at startup. Move the routines
1114 from being local to tls.c to being global via the os.c file.
1116 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1117 an extract embedded as result-arg for a map, the first arg for extract
1118 is unavailable so we cannot tell if this is a numbered or keyed
1119 extraction. Accept either.
1125 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1128 JH/02 The smtp transport option "multi_domain" is now expanded.
1130 JH/03 The smtp transport now requests PRDR by default, if the server offers
1133 JH/04 Certificate name checking on server certificates, when exim is a client,
1134 is now done by default. The transport option tls_verify_cert_hostnames
1135 can be used to disable this per-host. The build option
1136 EXPERIMENTAL_CERTNAMES is withdrawn.
1138 JH/05 The value of the tls_verify_certificates smtp transport and main options
1139 default to the word "system" to access the system default CA bundle.
1140 For GnuTLS, only version 3.0.20 or later.
1142 JH/06 Verification of the server certificate for a TLS connection is now tried
1143 (but not required) by default. The verification status is now logged by
1144 default, for both outbound TLS and client-certificate supplying inbound
1147 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1150 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1151 Status Notification (bounce) messages are now MIME format per RFC 3464.
1152 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1153 under the control of the dsn_advertise_hosts option, and routers may
1154 have a dsn_lasthop option.
1156 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1157 default, modifiable by a malware= option. The list separator for
1158 the options can now be changed in the usual way. Bug 68.
1160 JH/10 The smtp_receive_timeout main option is now expanded before use.
1162 JH/11 The incoming_interface log option now also enables logging of the
1163 local interface on delivery outgoing connections.
1165 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1166 if the interface and destination host and port all match.
1168 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1171 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1172 Patch from Andrew Lewis.
1174 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1175 now supports optional time-restrictions, weighting, and priority
1176 modifiers per server. Patch originally by <rommer@active.by>.
1178 JH/16 The spamd_address main option now supports a mixed list of local
1179 and remote servers. Remote servers can be IPv6 addresses, and
1180 specify a port-range.
1182 JH/17 Bug 68: The spamd_address main option now supports an optional
1183 timeout value per server.
1185 JH/18 Bug 1581: Router and transport options headers_add/remove can
1186 now have the list separator specified.
1188 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1191 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1194 JH/21 Support for the A6 type of dns record is withdrawn.
1196 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1197 rather than the verbs used.
1199 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1200 from 255 to 1024 chars.
1202 JH/24 Verification callouts now attempt to use TLS by default.
1204 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1205 are generic router options now. The defaults didn't change.
1207 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1208 Original patch from Alexander Shikoff, worked over by JH.
1210 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1211 files if ZCAT_COMMAND is not executable.
1213 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1215 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1217 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1218 Normally benign, it bites when the pair was led to by a CNAME;
1219 modern usage is to not canonicalize the domain to a CNAME target
1220 (and we were inconsistent anyway for A-only vs AAAA+A).
1222 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1224 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1225 when evaluating $sender_host_dnssec.
1227 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1228 $sender_helo_dnssec variable.
1230 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1232 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1234 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1236 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1237 documented as working, but never had. Support all but $spam_report.
1239 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1240 added for tls authenticator.
1242 HS/03 Add perl_taintmode main config option
1248 TL/01 When running the test suite, the README says that variables such as
1249 no_msglog_check are global and can be placed anywhere in a specific
1250 test's script, however it was observed that placement needed to be near
1251 the beginning for it to behave that way. Changed the runtest perl
1252 script to read through the entire script once to detect and set these
1253 variables, reset to the beginning of the script, and then run through
1254 the script parsing/test process like normal.
1256 TL/02 The BSD's have an arc4random API. One of the functions to induce
1257 adding randomness was arc4random_stir(), but it has been removed in
1258 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1259 function when detected.
1261 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1262 cause callback expansion.
1264 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1265 syntax errors in an expansion can be treated as a string instead of
1266 logging or causing an error, due to the internal use of bool_lax
1267 instead of bool when processing it.
1269 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1270 server certificates when making smtp deliveries.
1272 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1274 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1276 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1278 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1279 Merged patch from Sebastian Wiedenroth.
1281 JH/05 Fix results-pipe from transport process. Several recipients, combined
1282 with certificate use, exposed issues where response data items split
1283 over buffer boundaries were not parsed properly. This eventually
1284 resulted in duplicates being sent. This issue only became common enough
1285 to notice due to the introduction of connection certificate information,
1286 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1288 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1289 size buffer was used, resulting in syntax errors when an expansion
1292 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1293 version 3.3.6 or later.
1295 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1296 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1297 both become "event_action", the variables become $event_name, $event_data
1298 and $event_defer_errno. There is a new variable $verify_mode, usable in
1299 routers, transports and related events. The tls:cert event is now also
1300 raised for inbound connections, if the main configuration event_action
1303 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1304 early OCSP support, but no stapling (appears to be less than 1.0.0).
1306 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1307 server certificate names available under the smtp transport option
1308 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1311 JH/10 Time-related extraction expansions from certificates now use the main
1312 option "timezone" setting for output formatting, and are consistent
1313 between OpenSSL and GnuTLS compilations. Bug 1541.
1315 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1316 encoded parameter in the incoming message. Bug 1558.
1318 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1319 include certificate info, eximon was claiming there were spoolfile
1322 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1324 JH/14 Log delivery-related information more consistently, using the sequence
1325 "H=<name> [<ip>]" wherever possible.
1327 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1328 are problematic for Debian distribution, omit them from the release
1331 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1333 JH/16 Fix string representation of time values on 64bit time_t architectures.
1336 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1337 output list separator was used.
1342 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1343 checkers that were complaining about end of non-void function with no
1346 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1347 This was a regression introduced in 4.83 by another bugfix.
1349 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1351 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1352 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1358 TF/01 Correctly close the server side of TLS when forking for delivery.
1360 When a message was received over SMTP with TLS, Exim failed to clear up
1361 the incoming connection properly after forking off the child process to
1362 deliver the message. In some situations the subsequent outgoing
1363 delivery connection happened to have the same fd number as the incoming
1364 connection previously had. Exim would try to use TLS and fail, logging
1365 a "Bad file descriptor" error.
1367 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1368 utilities have not been installed.
1370 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1371 temporary space as the ACL may create new global variables.
1373 TL/01 LDAP support uses per connection or global context settings, depending
1374 upon the detected version of the libraries at build time.
1376 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1377 to extract and use the src ip:port in logging and expansions as if it
1378 were a direct connection from the outside internet. PPv2 support was
1379 updated based on HAProxy spec change in May 2014.
1381 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1383 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1384 Properly escape header and check for NULL return.
1386 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1389 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1391 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1392 characters in header names, implemented as a verify condition.
1393 Contributed by Michael Fischer v. Mollard.
1395 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1396 results permerror and temperror. Previous values are deprecated but
1397 still accepted. In a future release, err_perm and err_temp will be
1398 completely removed, which will be a backward incompatibility if the
1399 ACL tests for either of these two old results. Patch contributed by
1400 user bes-internal on the mailing list.
1402 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1404 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1405 selectors, in both main and reject logs.
1407 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1410 JH/07 Add malware type "sock" for talking to simple daemon.
1412 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1414 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1415 routers/transports under cutthrough routing.
1417 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1418 numbers. Touch up "bool" conditional to keep the same definition.
1420 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1422 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1424 JH/12 Expand items in router/transport headers_add or headers_remove lists
1425 individually rather than the list as a whole. Bug 1452.
1427 Required for reasonable handling of multiple headers_ options when
1428 they may be empty; requires that headers_remove items with embedded
1429 colons must have them doubled (or the list-separator changed).
1431 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1432 view the policy declared in the DMARC record. Currently, $dmarc_status
1433 is a combined value of both the record presence and the result of the
1436 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1438 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1439 dnslookup router and the smtp transport (applying to the forward
1442 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1443 of ldap servers used for a specific lookup. Patch provided by Heiko
1446 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1447 New variable $lookup_dnssec_authenticated for observability.
1449 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1450 Patch submitted by Lars Timman.
1452 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1454 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1455 Requires trusted mode and valid format message id, aborts otherwise.
1456 Patch contributed by Heiko Schlichting.
1458 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1459 certextract with support for various fields. Bug 1358.
1461 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1462 is requested by default, modifiable by smtp transport option
1465 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1466 operate on certificate variables to give certificate fingerprints
1467 Also new ${sha256:cert_variable}.
1469 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1471 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1472 Christian Aistleitner.
1474 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1476 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1477 file. Patch from Wolfgang Breyha.
1479 JH/25 Expand the coverage of the delivery $host and $host_address to
1480 client authenticators run in verify callout. Bug 1476.
1482 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1483 align with daemon_smtp_ports. Bug 72.
1485 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1486 support and error reporting did not work properly.
1488 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1489 and is readable. Patch from Andrew Colin Kissa.
1491 TL/14 Enhance documentation of ${run expansion and how it parses the
1492 commandline after expansion, particularly in the case when an
1493 unquoted variable expansion results in an empty value.
1495 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1497 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1498 by renaming away from it. Addresses GH issue 15, reported by
1501 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1503 TL/15 SECURITY: prevent double expansion in math comparison functions
1504 (can expand unsanitized data). Not remotely exploitable.
1511 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1513 PP/02 Make -n do something, by making it not do something.
1514 When combined with -bP, the name of an option is not output.
1516 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1519 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1520 $sender_host_name and config options to manage this, and basic check
1523 PP/05 DSCP support for outbound connections and control modifier for inbound.
1525 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1526 (Only plugin which currently uses this is kerberos4, which nobody should
1527 be using, but we should make it available and other future plugins might
1528 conceivably use it, even though it would break NAT; stuff *should* be
1529 using channel bindings instead).
1531 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1532 name; added for Sendmail compatibility; requires admin caller.
1533 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1534 just ignore it); requires trusted caller.
1535 Also parse but ignore: -Ac -Am -X<logfile>
1538 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1540 TL/02 Add +smtp_confirmation as a default logging option.
1542 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1543 Patch by Magnus Holmgren from 2007-02-20.
1545 TL/04 Bugzilla 1281 - Spec typo.
1546 Bugzilla 1283 - Spec typo.
1547 Bugzilla 1290 - Spec grammar fixes.
1549 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1551 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1553 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1554 mailing list by by Dmitry Isaikin.
1556 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1558 JH/02 Support "G" suffix to numbers in ${if comparisons.
1560 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1562 NM/01 Bugzilla 1197 - Spec typo
1563 Bugzilla 1196 - Spec examples corrections
1565 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1567 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1568 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1571 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1572 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1574 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1575 "acl {{name}{arg}...}", and optional args on acl condition
1578 JH/05 Permit multiple router/transport headers_add/remove lines.
1580 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1582 JH/07 Avoid using a waiting database for a single-message-only transport.
1583 Performance patch from Paul Fisher. Bugzilla 1262.
1585 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1588 JH/09 Add $headers_added variable, with content from use of ACL modifier
1589 add_header (but not yet added to the message). Bugzilla 199.
1591 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1592 Pulled from Bugzilla 817 by Wolfgang Breyha.
1594 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1596 (nb: this is the same fix as in Exim 4.80.1)
1598 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1601 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1604 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1606 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1607 advertise SMTP AUTH mechanism to us, instead of a generic
1608 protocol violation error. Also, make Exim more robust to bad
1609 data from the Dovecot auth socket.
1611 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1613 When a queue runner is handling a message, Exim first routes the
1614 recipient addresses, during which it prunes them based on the retry
1615 hints database. After that it attempts to deliver the message to
1616 any remaining recipients. It then updates the hints database using
1619 So if a recipient address works intermittently, it can get repeatedly
1620 deferred at routing time. The retry hints record remains fresh so the
1621 address never reaches the final cutoff time.
1623 This is a fairly common occurrence when a user is bumping up against
1624 their storage quota. Exim had some logic in its local delivery code
1625 to deal with this. However it did not apply to per-recipient defers
1626 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1628 This change adds a proper retry rule check during routing so that the
1629 final cutoff time is checked against the message's age. We only do
1630 this check if there is an address retry record and there is not a
1631 domain retry record; this implies that previous attempts to handle
1632 the address had the retry_use_local_parts option turned on. We use
1633 this as an approximation for the destination being like a local
1634 delivery, as in LMTP.
1636 I suspect this new check makes the old local delivery cutoff check
1637 redundant, but I have not verified this so I left the code in place.
1639 TF/02 Correct gecos expansion when From: is a prefix of the username.
1641 Test 0254 submits a message to Exim with the header
1645 When I ran the test suite under the user fanf2, Exim expanded
1646 the header to contain my full name, whereas it should have added
1647 a Resent-Sender: header. It erroneously treats any prefix of the
1648 username as equal to the username.
1650 This change corrects that bug.
1652 GF/01 DCC debug and logging tidyup
1653 Error conditions log to paniclog rather than rejectlog.
1654 Debug lines prefixed by "DCC: " to remove any ambiguity.
1656 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1658 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1659 Bug spotted by Jeremy Harris; was flawed since initial commit.
1660 Would have resulted in OCSP responses post-SNI triggering an Exim
1661 NULL dereference and crash.
1663 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1665 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1666 Bug detection, analysis and fix by Samuel Thibault.
1667 Bugzilla 1331, Debian bug #698092.
1669 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1671 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1672 Server implementation by Todd Lyons, client by JH.
1673 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1674 config variable "prdr_enable" controls whether the server
1675 advertises the facility. If the client requests PRDR a new
1676 acl_data_smtp_prdr ACL is called once for each recipient, after
1677 the body content is received and before the acl_smtp_data ACL.
1678 The client is controlled by both of: a hosts_try_prdr option
1679 on the smtp transport, and the server advertisement.
1680 Default client logging of deliveries and rejections involving
1681 PRDR are flagged with the string "PRDR".
1683 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1684 fclose(). Diagnosis by Todd Lyons.
1686 PP/17 Update configure.default to handle IPv6 localhost better.
1687 Patch by Alain Williams (plus minor tweaks).
1690 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1691 This is now consistent with GnuTLS, and is now documented: the
1692 previous undocumented portable approach to treating the option as
1693 unset was to force an expansion failure. That still works, and
1694 an empty string is now equivalent.
1696 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1697 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1698 not performing validation itself.
1700 PP/20 Added force_command boolean option to pipe transport.
1701 Patch from Nick Koston, of cPanel Inc.
1703 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1706 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1708 PP/21 Fix eximon continuous updating with timestamped log-files.
1709 Broken in a format-string cleanup in 4.80, missed when I repaired the
1710 other false fix of the same issue.
1711 Report and fix from Heiko Schlichting.
1714 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1715 Report from Prashanth Katuri.
1717 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1718 It's SecureTransport, so affects any MacOS clients which use the
1719 system-integrated TLS libraries, including email clients.
1721 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1722 using a MIME ACL for non-SMTP local injection.
1723 Report and assistance in diagnosis by Warren Baker.
1725 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1727 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1729 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1730 last id that failed so it may be referenced in subsequent ACL's.
1732 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1735 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1736 ldap library initialization, allowing self-signed CA's to be
1737 used. Also properly sets require_cert option later in code by
1738 using NULL (global ldap config) instead of ldap handle (per
1739 session). Bug diagnosis and testing by alxgomz.
1741 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1742 the src/util/ subdirectory.
1744 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1745 renamed to Transport Post Delivery Action by Jeremy Harris, as
1748 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1749 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1750 redis_servers = needs to be configured which will be used by the redis
1751 lookup. Patch from Warren Baker, of The Packet Hub.
1753 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1755 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1756 hostname or reverse DNS when processing a host list. Used suggestions
1757 from multiple comments on this bug.
1759 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1761 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1762 Missed a few lines, added it to make the runtest require no keyboard
1765 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1766 contains upper case chars. Make router use caseful_local_part.
1768 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1769 support when GnuTLS has been built with p11-kit.
1775 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1777 This, or similar/improved, will also be change PP/11 of 4.82.
1783 PP/01 Handle short writes when writing local log-files.
1784 In practice, only affects FreeBSD (8 onwards).
1785 Bugzilla 1053, with thanks to Dmitry Isaikin.
1787 NM/01 Bugzilla 949 - Documentation tweak
1789 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1792 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1794 PP/02 Implemented gsasl authenticator.
1796 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1798 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1799 `pkg-config foo` for cflags/libs.
1801 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1802 with rest of GSASL and with heimdal_gssapi.
1804 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1805 `pkg-config foo` for cflags/libs for the TLS implementation.
1807 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1808 properties get this fed in as external SSF. A number of robustness
1809 and debugging improvements to the cyrus_sasl authenticator.
1811 PP/08 cyrus_sasl server now expands the server_realm option.
1813 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1814 Patch by Jeremy Harris.
1816 PP/10 Added dbmjz lookup type.
1818 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1820 PP/12 MAIL args handles TAB as well as SP, for better interop with
1821 non-compliant senders.
1822 Analysis and variant patch by Todd Lyons.
1824 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1825 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1826 Patch from Dirk Mueller <dmueller@suse.com>
1828 PP/13 tls_peerdn now print-escaped for spool files.
1829 Observed some $tls_peerdn in wild which contained \n, which resulted
1830 in spool file corruption.
1832 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1833 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1834 or write after TLS renegotiation, which otherwise led to messages
1837 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1838 as a tracking header (ie: a signed header comes before the signature).
1839 Patch from Wolfgang Breyha.
1841 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1842 comma-sep list; embedded commas doubled.
1844 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1846 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1848 Report and patch from Dmitry Banschikov.
1850 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1851 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1852 failures. We appear to now support TLS1.1+ with Exim.
1854 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1855 lets Exim select keys and certificates based upon TLS SNI from client.
1856 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1857 before an outbound SMTP session. New log_selector, +tls_sni.
1859 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1860 NULL dereference. Report and patch from Alun Jones.
1862 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1863 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1864 Not seeing resolver debug output on NetBSD, but suspect this is a
1865 resolver implementation change.
1867 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1868 Left warnings. Added "eximon gdb" invocation mode.
1870 PP/21 Defaulting "accept_8bitmime" to true, not false.
1872 PP/22 Added -bw for inetd wait mode support.
1874 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1875 locate the relevant includes and libraries. Made this the default.
1877 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1878 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1880 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1881 This may cause build issues on older platforms.
1883 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1884 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1885 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1886 Added SNI support via GnuTLS too.
1887 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1889 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1891 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1892 Applied second patch from Janne, implementing suggestion to default
1893 multiple-strings-in-record handling to match SPF spec.
1895 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1897 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1898 read-only, out of scope).
1899 Patch from Wolfgang Breyha, report from Stuart Northfield.
1901 PP/29 Fix three issues highlighted by clang analyser static analysis.
1902 Only crash-plausible issue would require the Cambridge-specific
1903 iplookup router and a misconfiguration.
1904 Report from Marcin Mirosław.
1906 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1908 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1909 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1910 As part of this, removing so much warning spew let me fix some minor
1911 real issues in debug logging.
1913 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1914 assignment on my part. Fixed.
1916 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1917 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1918 Janne Snabb (who went above and beyond: thank you).
1920 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1921 string otherwise requires a connection and a bunch more work and it's
1922 relatively easy to get wrong. Should also expose TLS library linkage
1925 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1926 64-bit ${eval} (JH/03).
1928 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1929 GNU libc to support some of the 64-bit stuff, should not lead to
1930 conflicts. Defined before os.h is pulled in, so if a given platform
1931 needs to override this, it can.
1933 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1934 protection layer was required, which is not implemented.
1935 Bugzilla 1254, patch from Wolfgang Breyha.
1937 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1938 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1939 tls_dhparam take prime identifiers. Also unbreak combination of
1940 OpenSSL+DH_params+TLSSNI.
1942 PP/39 Disable SSLv2 by default in OpenSSL support.
1948 PP/01 Solaris build fix for Oracle's LDAP libraries.
1949 Bugzilla 1109, patch from Stephen Usher.
1951 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1953 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1956 TF/02 Fix a couple more cases where we did not log the error message
1957 when unlink() failed. See also change 4.74-TF/03.
1959 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1960 lock up or crash if it happened to be inside a call to libc when it
1961 got a SIGUSR1 from exiwhat.
1963 The SIGUSR1 handler appends the current process status to the process
1964 log which is later printed by exiwhat. It used to use the general
1965 purpose logging code to do this, but several functions it calls are
1966 not safe for signals.
1968 The new output code in the SIGUSR1 handler is specific to the process
1969 log, and simple enough that it's easy to inspect for signal safety.
1970 Removing some special cases also simplifies the general logging code.
1971 Removing the spurious timestamps from the process log simplifies
1974 TF/04 Improved ratelimit ACL condition.
1976 The /noupdate option has been deprecated in favour of /readonly which
1977 has clearer semantics. The /leaky, /strict, and /readonly update modes
1978 are mutually exclusive. The update mode is no longer included in the
1979 database key; it just determines when the database is updated. (This
1980 means that when you upgrade Exim will forget old rate measurements.)
1982 Exim now checks that the per_* options are used with an update mode that
1983 makes sense for the current ACL. For example, when Exim is processing a
1984 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1985 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1986 must specify per_mail/readonly. If you omit the update mode it defaults to
1987 /leaky where that makes sense (as before) or /readonly where required.
1989 The /noupdate option is now undocumented but still supported for
1990 backwards compatibility. It is equivalent to /readonly except that in
1991 ACLs where /readonly is required you may specify /leaky/noupdate or
1992 /strict/noupdate which are treated the same as /readonly.
1994 A useful new feature is the /count= option. This is a generalization
1995 of the per_byte option, so that you can measure the throughput of other
1996 aggregate values. For example, the per_byte option is now equivalent
1997 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1999 The per_rcpt option has been generalized using the /count= mechanism
2000 (though it's more complicated than the per_byte equivalence). When it is
2001 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2002 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2003 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2004 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2005 Note that using per_rcpt with a non-readonly update mode in more than
2006 one ACL will cause the recipients to be double-counted. (The per_mail
2007 and per_byte options don't have this problem.)
2009 The handling of very low rates has changed slightly. If the computed rate
2010 is less than the event's count (usually one) then this event is the first
2011 after a long gap. In this case the rate is set to the same as this event's
2012 count, so that the first message of a spam run is counted properly.
2014 The major new feature is a mechanism for counting the rate of unique
2015 events. The new per_addr option counts the number of different
2016 recipients that someone has sent messages to in the last time period. It
2017 behaves like per_rcpt if all the recipient addresses are different, but
2018 duplicate recipient addresses do not increase the measured rate. Like
2019 the /count= option this is a general mechanism, so the per_addr option
2020 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2021 example, measure the rate that a client uses different sender addresses
2022 with the options per_mail/unique=$sender_address. There are further
2023 details in the main documentation.
2025 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2027 TF/06 Removed a few PCRE remnants.
2029 TF/07 Automatically extract Exim's version number from tags in the git
2030 repository when doing development or release builds.
2032 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2033 Bugzilla 879. Patch from Paul Fisher.
2035 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2036 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2039 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2041 PP/05 Variable $av_failed, true if the AV scanner deferred.
2042 Bugzilla 1078. Patch from John Horne.
2044 PP/06 Stop make process more reliably on build failure.
2045 Bugzilla 1087. Patch from Heiko Schlittermann.
2047 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2048 Bugzilla 1089. Patch from Heiko Schlittermann.
2050 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2051 Bugzilla 1131. Patch from Holger Weiß.
2053 PP/09 Handle IPv6 addresses with SPF.
2054 Bugzilla 860. Patch from Wolfgang Breyha.
2056 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2058 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2061 PP/11 match_* no longer expand right-hand-side by default.
2062 New compile-time build option, EXPAND_LISTMATCH_RHS.
2063 New expansion conditions, "inlist", "inlisti".
2065 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2067 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2069 PP/14 fix log_write() format string regression from TF/03.
2070 Bugzilla 1152. Patch from Dmitry Isaikin.
2076 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2078 PP/02 Harmonised TLS library version reporting; only show if debugging.
2079 Layout now matches that introduced for other libraries in 4.74 PP/03.
2081 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2083 PP/04 New "dns_use_edns0" global option.
2085 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2088 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2089 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2091 TK/01 Updated PolarSSL code to 0.14.2.
2092 Bugzilla 1097. Patch from Andreas Metzler.
2094 PP/07 Catch divide-by-zero in ${eval:...}.
2095 Fixes bugzilla 1102.
2097 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2100 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2101 format-string attack -- SECURITY: remote arbitrary code execution.
2103 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2104 time unintentionally subject to list matching rules, letting the header
2105 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2106 arbitrary string expansion). This allowed for information disclosure.
2108 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2109 INT_MIN/-1 -- value coerced to INT_MAX.
2115 NM/01 Workaround for PCRE version dependency in version reporting
2118 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2119 This fixes portability to compilers other than gcc, notably
2120 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2122 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2123 makefiles for portability to HP-UX and POSIX correctness.
2125 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2126 Also via indented variable definition in the Makefile.
2127 (Debugging by Oliver Heesakkers).
2129 PP/02 Restore caching of spamd results with expanded spamd_address.
2130 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2132 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2133 Improves build reliability. Fix from: Frank Elsner
2135 NM/02 Fix wide character breakage in the rfc2047 coding
2136 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2138 NM/03 Allow underscore in dnslist lookups
2139 Fixes bug 1026. Patch from Graeme Fowler
2141 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2142 Code patches from Adam Ciarcinski of NetBSD.
2144 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2147 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2148 is logged, to avoid truncation. Patch from John Horne.
2150 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2151 Patch from Jakob Hirsch.
2153 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2154 SQL string expansion failure details.
2155 Patch from Andrey Oktyabrski.
2157 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2158 Patch from Simon Arlott.
2160 PP/09 New lookups functionality failed to compile on old gcc which rejects
2161 extern declarations in function scope.
2162 Patch from Oliver Fleischmann
2164 PP/10 Use sig_atomic_t for flags set from signal handlers.
2165 Check getgroups() return and improve debugging.
2166 Fixed developed for diagnosis in bug 927 (which turned out to be
2169 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2170 Patch from Mark Zealey.
2172 PP/12 Bugzilla 1056: Improved spamd server selection.
2173 Patch from Mark Zealey.
2175 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2176 Based on patch from Heiko Schlittermann.
2178 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2179 Patch from Uwe Doering, sign-off by Michael Haardt.
2181 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2182 variable declaration deep within a block. Bug and patch from
2185 PP/15 lookups-Makefile IRIX compatibility coercion.
2187 PP/16 Make DISABLE_DKIM build knob functional.
2189 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2190 Patch by Simon Arlott
2192 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2193 variable argument macros. Our copy now differs from upstream.
2199 TF/01 Failure to get a lock on a hints database can have serious
2200 consequences so log it to the panic log.
2202 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2203 controlled using the smtp_confirmation log selector.
2205 TF/03 Include the error message when we fail to unlink a spool file.
2207 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2208 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2209 for maintaining out-of-tree patches for some time.
2211 PP/01 Bugzilla 139: Documentation and portability issues.
2212 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2213 Handle per-OS dynamic-module compilation flags.
2215 PP/02 Let /dev/null have normal permissions.
2216 The 4.73 fixes were a little too stringent and complained about the
2217 permissions on /dev/null. Exempt it from some checks.
2218 Reported by Andreas M. Kirchwitz.
2220 PP/03 Report version information for many libraries, including
2221 Exim version information for dynamically loaded libraries. Created
2222 version.h, now support a version extension string for distributors
2223 who patch heavily. Dynamic module ABI change.
2225 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2226 privilege escalation vulnerability whereby the Exim run-time user
2227 can cause root to append content of the attacker's choosing to
2230 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2233 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2234 If dropping privileges for untrusted macros, we disabled normal logging
2235 on the basis that it would fail; for the Exim run-time user, this is not
2236 the case, and it resulted in successful deliveries going unlogged.
2237 Fixed. Reported by Andreas Metzler.
2243 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2244 only prepend for the Resent-* case. Fixes regression introduced in
2245 Exim 4.70 by NM/22 for Bugzilla 607.
2247 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2248 increasing numbers of administrators be bitten by this.
2250 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2252 PP/03 Bugzilla 994: added openssl_options main configuration option.
2254 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2256 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2258 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2260 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2261 without a peer certificate, leading to a segfault because of an
2262 assumption that peers always have certificates. Be a little more
2263 paranoid. Problem reported by Martin Tscholak.
2265 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2266 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2267 NB: ClamAV planning to remove STREAM in "middle of 2010".
2268 CL also introduces -bmalware, various -d+acl logging additions and
2269 more caution in buffer sizes.
2271 PP/09 Implemented reverse_ip expansion operator.
2273 PP/10 Bugzilla 937: provide a "debug" ACL control.
2275 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2277 PP/12 Bugzilla 973: Implement --version.
2279 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2281 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2283 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2285 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2286 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2287 ignore trailing whitespace.
2289 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2291 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2294 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2295 Notification from Dr Andrew Aitchison.
2297 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2298 ExtendedDetectionInfo response format.
2299 Notification from John Horne.
2301 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2304 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2305 XSL and documented dependency on system catalogs, with examples of how
2308 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2311 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2312 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2313 configuration file which is writeable by the Exim user or group.
2315 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2316 of configuration files to cover files specified with the -C option if
2317 they are going to be used with root privileges, not just the default
2320 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2321 option (effectively making it always true).
2323 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2324 files to be used while preserving root privileges.
2326 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2327 that rogue child processes cannot use them.
2329 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2330 run-time user, instead of root.
2332 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2333 Exim run-time user without dropping privileges.
2335 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2336 result string, instead of calling string_vformat() twice with the same
2339 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2340 for other users. Others should always drop root privileges if they use
2341 -C on the command line, even for a whitelisted configure file.
2343 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2345 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2351 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2352 $data_path, and $header_path variables; fixed documentation bugs and
2355 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2356 exipick to access non-standard spools, including the "frozen" queue
2359 NM/01 Bugzilla 965: Support mysql stored procedures.
2360 Patch from Alain Williams
2362 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2364 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2365 Patch from Andreas Metzler
2367 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2368 Patch from Kirill Miazine
2370 NM/05 Bugzilla 671: Added umask to procmail example.
2372 JJ/03 installed exipick 20100323.0, fixing doc bug
2374 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2375 directory. Notification and patch from Dan Rosenberg.
2377 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2379 TK/02 Improve log output when DKIM signing operation fails.
2381 MH/01 Treat the transport option dkim_domain as a colon separated
2382 list, not as a single string, and sign the message with each element,
2383 omitting multiple occurences of the same signer.
2385 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2386 Bugzilla 985, 986. Patch by Simon Arlott
2388 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2389 Patch by Simon Arlott
2391 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2392 MBX locking. Notification from Dan Rosenberg.
2398 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2400 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2402 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2404 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2406 NM/04 Bugzilla 915: Flag broken perl installation during build.
2412 TK/01 Added patch by Johannes Berg that expands the main option
2413 "spamd_address" if it starts with a dollar sign.
2415 TK/02 Write list of recipients to X-Envelope-Sender header when building
2416 the mbox-format spool file for content scanning (suggested by Jakob
2419 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2420 (http://www.dcc-servers.net/) support via dccifd. Activated by
2421 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2423 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2424 by Mark Daniel Reidel <mr@df.eu>.
2426 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2427 When building exim an external PCRE library is now needed -
2428 PCRE is a system library on the majority of modern systems.
2429 See entry on PCRE_LIBS in EDITME file.
2431 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2432 conversation. Added nologin parameter to request.
2433 Patch contributed by Kirill Miazine.
2435 TF/01 Do not log submission mode rewrites if they do not change the address.
2437 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2439 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2440 log files in place. Contributed by Roberto Lima.
2442 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2444 TF/03 Bugzilla 615: When checking the local_parts router precondition
2445 after a local_part_suffix or local_part_prefix option, Exim now
2446 does not use the address's named list lookup cache, since this
2447 contains cached lookups for the whole local part.
2449 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2450 Robert Millan. Documentation is in experimental-spec.txt.
2452 TF/04 Bugzilla 668: Fix parallel build (make -j).
2454 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2456 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2457 Patch provided by Jan Srzednicki.
2459 TF/05 Leading white space used to be stripped from $spam_report which
2460 wrecked the formatting. Now it is preserved.
2462 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2463 that they are available at delivery time.
2465 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2467 TF/08 TLS error reporting now respects the incoming_interface and
2468 incoming_port log selectors.
2470 TF/09 Produce a more useful error message if an SMTP transport's hosts
2471 setting expands to an empty string.
2473 NM/06 Bugzilla 744: EXPN did not work under TLS.
2474 Patch provided by Phil Pennock.
2476 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2477 Patch provided by Richard Godbee.
2479 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2480 acl_smtp_notquit, added index entry.
2482 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2483 Patch provided by Eugene Bujak.
2485 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2486 accept(). Patch provided by Maxim Dounin.
2488 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2489 Patch provided by Phil Pennock.
2491 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2493 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2494 Patch provided by Brad "anomie" Jorsch.
2496 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2497 Patch provided by Dean Brooks.
2499 TK/05 Add native DKIM support (does not depend on external libraries).
2501 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2502 Patch provided by Graeme Fowler.
2504 NM/16 Bugzilla 851: Documentation example syntax fix.
2506 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2508 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2511 NM/19 Bugzilla 745: TLS version reporting.
2512 Patch provided by Phil Pennock.
2514 NM/20 Bugzilla 167: bool: condition support.
2515 Patch provided by Phil Pennock.
2517 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2518 clients. Patch provided by Phil Pennock.
2520 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2521 Patch provided by Brad "anomie" Jorsch.
2523 NM/23 Bugzilla 687: Fix misparses in eximstats.
2524 Patch provided by Heiko Schlittermann.
2526 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2527 Patch provided by Heiko Schlittermann.
2529 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2530 plus update to original patch.
2532 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2534 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2535 Patch provided by David Brownlee.
2537 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2539 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2541 NM/30 Bugzilla 888: TLS documentation bugfixes.
2543 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2545 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2546 Unlike the original bugzilla I have changed all shell scripts in src tree.
2548 NM/33 Bugzilla 898: Transport filter timeout fix.
2549 Patch by Todd Rinaldo.
2551 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2552 Patch by Serge Demonchaux.
2554 NM/35 Bugzilla 39: Base64 decode bug fixes.
2555 Patch by Jakob Hirsch.
2557 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2559 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2561 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2563 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2569 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2570 ALT-N's libdkim that I have put here:
2571 http://duncanthrax.net/exim-experimental/
2573 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2574 were called 'true' and it seems that C99 defines that as a reserved
2575 keyword to be used with 'bool' variable types. That means you could
2576 not include C99-style headers which use bools without triggering
2577 build errors in sieve.c.
2579 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2580 as mailq or other aliases. Changed the --help handling significantly
2581 to do whats expected. exim_usage() emits usage/help information.
2583 SC/01 Added the -bylocaldomain option to eximstats.
2585 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2587 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2589 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2595 PH/01 Another patch from the Sieve maintainer.
2597 PH/02 When an IPv6 address is converted to a string for single-key lookup
2598 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2599 dots are used instead of colons so that keys in lsearch files need not
2600 contain colons. This was done some time before quoting was made available
2601 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2602 (notated using the quote facility) so as to distinguish them from IPv4
2603 keys. This meant that lookups for IP addresses in host lists did not work
2604 for iplsearch lookups.
2606 This has been fixed by arranging for IPv6 addresses to be expressed with
2607 colons if the lookup type is iplsearch. This is not incompatible, because
2608 previously such lookups could never work.
2610 The situation is now rather anomalous, since one *can* have colons in
2611 ordinary lsearch keys. However, making the change in all cases is
2612 incompatible and would probably break a number of configurations.
2614 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2617 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2618 conversion specification without a maximum field width, thereby enabling
2619 a rogue spamd server to cause a buffer overflow. While nobody in their
2620 right mind would setup Exim to query an untrusted spamd server, an
2621 attacker that gains access to a server running spamd could potentially
2622 exploit this vulnerability to run arbitrary code as the Exim user.
2624 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2625 $primary_hostname instead of what libspf2 thinks the hosts name is.
2627 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2628 a directory entry by the name of the lookup key. Previously, if a
2629 symlink pointed to a non-existing file or a file in a directory that
2630 Exim lacked permissions to read, a lookup for a key matching that
2631 symlink would fail. Now it is enough that a matching directory entry
2632 exists, symlink or not. (Bugzilla 503.)
2634 PH/03 The body_linecount and body_zerocount variables are now exported in the
2637 PH/04 Added the $dnslist_matched variable.
2639 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2640 This means they are set thereafter only if the connection becomes
2643 PH/06 Added the client_condition to authenticators so that some can be skipped
2644 by clients under certain conditions.
2646 PH/07 The error message for a badly-placed control=no_multiline_responses left
2647 "_responses" off the end of the name.
2649 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2651 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2652 (without spaces) instead of just copying the configuration text.
2654 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2656 PH/11 Added $max_received_linelength.
2658 PH/12 Added +ignore_defer and +include_defer to host lists.
2660 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2661 way in which PCRE > 7.0 is built.
2663 PH/14 Implemented queue_only_load_latch.
2665 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2666 MAIL command. The effect was to mangle the value on 64-bit systems.
2668 PH/16 Another patch from the Sieve maintainer.
2670 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2672 PH/18 If a system quota error occurred while trying to create the file for
2673 a maildir delivery, the message "Mailbox is full" was not appended to the
2674 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2675 only to a quota excession during the actual writing of the file.
2677 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2678 characters?) which causes problems in log lines. The DN values are now
2679 passed through string_printing() before being added to log lines.
2681 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2682 and InterBase are left for another time.)
2684 PH/21 Added message_body_newlines option.
2686 PH/22 Guard against possible overflow in moan_check_errorcopy().
2688 PH/23 POSIX allows open() to be a macro; guard against that.
2690 PH/24 If the recipient of an error message contained an @ in the local part
2691 (suitably quoted, of course), incorrect values were put in $domain and
2692 $local_part during the evaluation of errors_copy.
2698 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2699 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2702 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2703 issue a MAIL command.
2705 PH/02 In an ACL statement such as
2707 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2709 if a client was not listed at all, or was listed with a value other than
2710 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2711 the condition was not true (as it should be), so access was not denied.
2712 The bug was that the ! inversion was incorrectly passed on to the second
2713 item. This has been fixed.
2715 PH/03 Added additional dnslists conditions == and =& which are different from
2716 = and & when the dns lookup returns more than one IP address.
2718 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2719 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2721 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2722 FSYNC, which compiles an option called disable_fsync that allows for
2723 bypassing fsync(). The documentation is heavily laced with warnings.
2725 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2727 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2728 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2729 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2730 including adding "make clean"; (3) Added -fPIC when compiling the test
2731 dynamically loaded module, to get rid of a warning.
2733 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2734 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2735 = 0s. The bug is otherwise harmless.
2737 PH/07 There was a bug in the dovecot authenticator such that the value of
2738 $auth1 could be overwritten, and so not correctly preserved, after a
2739 successful authentication. This usually meant that the value preserved by
2740 the server_setid option was incorrect.
2742 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2744 PH/09 Installed PCRE release 7.0.
2746 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2747 run for batched SMTP input. It is now run at the start of every message
2748 in the batch. While fixing this I discovered that the process information
2749 (output by running exiwhat) was not always getting set for -bs and -bS
2750 input. This is fixed, and it now also says "batched" for BSMTP.
2752 PH/11 Added control=no_pipelining.
2754 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2755 patch, slightly modified), and move the expansion of helo_data till after
2756 the connection is made in the smtp transport (so it can use these
2759 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2761 PH/14 Added log_selector = +pid.
2763 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2765 PH/16 Add ${if forany and ${if forall.
2767 PH/17 Added dsn_from option to vary the From: line in DSNs.
2769 PH/18 Flush SMTP output before performing a callout, unless control =
2770 no_callout_flush is set.
2772 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2773 was true (the default) a successful delivery failed to delete the retry
2774 item, thus causing premature timeout of the address. The bug is now
2777 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2779 PH/21 Long custom messages for fakedefer and fakereject are now split up
2780 into multiline responses in the same way that messages for "deny" and
2781 other ACL rejections are.
2783 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2784 with slight modification.
2786 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2787 draft, changing the syntax and factoring some duplicate code".
2789 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2790 for deliveries of the second and subsequent messages over the same SMTP
2793 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2794 ${reduce, with only minor "tidies".
2796 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2798 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2799 expansion side effects.
2801 PH/27 When a message times out after an over-quota error from an Exim-imposed
2802 quota, the bounce message says "mailbox is full". This message was not
2803 being given when it was a system quota that was exceeded. It now should
2806 MH/03 Made $recipients available in local_scan(). local_scan() already has
2807 better access to the recipient list through recipients_list[], but
2808 $recipients can be useful in postmaster-provided expansion strings.
2810 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2811 in the case of a MAIL command with additional options following the
2812 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2813 were accidentally chopped off.
2815 PH/29 SMTP synchronization checks are implemented when a command is read -
2816 there is a check that no more input is waiting when there shouldn't be
2817 any. However, for some commands, a delay in an ACL can mean that it is
2818 some time before the response is written. In this time, more input might
2819 arrive, invalidly. So now there are extra checks after an ACL has run for
2820 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2821 pipelining has not been advertised.
2823 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2825 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2826 returned in the SMTP response when smtp_return_error_details was false.
2827 This has been fixed.
2829 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2830 instead of the C I/O that was originally supplied, because problems were
2831 reported on Solaris.
2833 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2834 Exim which did not show up earlier: it was assuming that a call to
2835 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2836 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2837 was a macro that became an assignment, so it seemed to work. This has
2838 changed to a proper function call with a void return, hence the compile
2839 error. Exim's code has been fixed.
2841 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2844 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2846 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2848 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2849 because it turns out to be too big or there is a timeout) there is no
2850 "Completed" line in the log. When some messages of this type were
2851 selected by exigrep, they were listed as "not completed". Others were
2852 picked up by some special patterns. I have improved the selection
2853 criteria to be more general.
2855 PH/38 The host_find_failed option in the manualroute router can now be set
2856 to "ignore", to completely ignore a host whose IP address cannot be
2857 found. If all hosts are ignored, the behaviour is controlled by the new
2858 host_all_ignored option.
2860 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2861 homing or because of multiple MX records with /mx) generated more than
2862 one IP address, and the following item turned out to be the local host,
2863 all the secondary addresses of the first item were incorrectly removed
2864 from the list, along with the local host and any following hosts (which
2865 is what is supposed to happen).
2867 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2868 whoever called Exim into the -H file. In the case of the daemon it was
2869 behaving confusingly. When first started, it used values for whoever
2870 started the daemon, but after a SIGHUP it used the Exim user (because it
2871 calls itself on a restart). I have changed the code so that it now always
2874 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2875 message are rejected with the same error (e.g. no authentication or bad
2876 sender address), and a DATA command is nevertheless sent (as can happen
2877 with PIPELINING or a stupid MUA), the error message that was given to the
2878 RCPT commands is included in the rejection of the DATA command. This is
2879 intended to be helpful for MUAs that show only the final error to their
2882 PH/42 Another patch from the Sieve maintainer.
2884 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2885 Eximstats - Fixed some broken HTML links and added missing column headers
2887 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2888 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2890 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2892 PH/43 Yet another patch from the Sieve maintainer.
2894 PH/44 I found a way to check for a TCP/IP connection going away before sending
2895 the response to the final '.' that terminates a message, but only in the
2896 case where the client has not sent further data following the '.'
2897 (unfortunately, this is allowed). However, in many cases there won't be
2898 any further data because there won't be any more messages to send. A call
2899 to select() can be used: if it shows that the input is "ready", there is
2900 either input waiting, or the socket has been closed. An attempt to read
2901 the next input character can distinguish the two cases. Previously, Exim
2902 would have sent an OK response which the client would never have see.
2903 This could lead to message repetition. This fix should cure that, at
2904 least in a lot of common cases.
2906 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2907 advertised in response to EHLO.
2913 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2914 fixed by 4.65/MH/01 (is this a record?) are fixed:
2916 (i) An empty string was always treated as zero by the numeric comparison
2917 operators. This behaviour has been restored.
2919 (ii) It is documented that the numeric comparison operators always treat
2920 their arguments as decimal numbers. This was broken in that numbers
2921 starting with 0 were being interpreted as octal.
2923 While fixing these problems I realized that there was another issue that
2924 hadn't been noticed. Values of message_size_limit (both the global option
2925 and the transport option) were treated as octal if they started with 0.
2926 The documentation was vague. These values are now always treated as
2927 decimal, and I will make that clear in the documentation.
2933 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2934 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2937 MH/01 Don't check that the operands of numeric comparison operators are
2938 integers when their expansion is in "skipping" mode (fixes bug
2939 introduced by 4.64-PH/07).
2941 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2942 child addresses, Exim now panics and dies. Previously, because the count
2943 is held in a short int, deliveries were likely to be lost. As such a
2944 large number of recipients for a single message is ridiculous
2945 (performance will be very, very poor), I have chosen to impose a limit
2946 rather than extend the field.
2952 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2953 leftover -K file (the existence of which was triggered by #402).
2954 While we were at it, introduced process PID as part of the -K
2955 filename. This should rule out race conditions when creating
2958 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2959 processing considerably. Previous code took too long for large mails,
2960 triggering a timeout which in turn triggers #401.
2962 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2963 in the DK code in transports.c. sendfile() is not really portable,
2964 hence the _LINUX specificness.
2966 TF/01 In the add_headers option to the mail command in an Exim filter,
2967 there was a bug that Exim would claim a syntax error in any
2968 header after the first one which had an odd number of characters
2971 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2972 callout verification, Exim cached a "reject" for the entire domain. This
2973 is correct for most verifications, but it is not correct for a recipient
2974 verification with use_sender or use_postmaster set, because in that case
2975 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2976 case of MAIL FROM:<> rejection from other early rejections (e.g.
2977 rejection of HELO). When verifying a recipient using a non-null MAIL
2978 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2979 Whatever the result of the callout, the value of the domain cache is
2980 left unchanged (for any other kind of callout, getting as far as trying
2981 RCPT means that the domain itself is ok).
2983 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2986 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2987 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2988 session, the daemon ignores ECONNECT errors and logs others; it now
2989 ignores EPIPE as well.
2991 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2992 (quoted-printable decoding).
2994 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2995 later the small subsequent patch to fix an introduced bug.
2997 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2999 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3001 PH/08 An error is now given if message_size_limit is specified negative.
3003 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3004 to be given (somewhat) arbitrary names.
3006 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3009 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3010 miscellaneous code fixes
3012 PH/10 Added the log_reject_target ACL modifier to specify where to log
3015 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3016 hostname. This is wrong, because it relates to the incoming message (and
3017 probably the interface on which it is arriving) and not to the outgoing
3018 callout (which could be using a different interface). This has been
3019 changed to use the value of the helo_data option from the smtp transport
3020 instead - this is what is used when a message is actually being sent. If
3021 there is no remote transport (possible with a router that sets up host
3022 addresses), $smtp_active_hostname is used.
3024 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3025 tweaks were necessary in order to get it to work (see also 21 below):
3026 (a) The code assumed that strncpy() returns a negative number on buffer
3027 overflow, which isn't the case. Replaced with Exim's string_format()
3029 (b) There were several signed/unsigned issues. I just did the minimum
3030 hacking in of casts. There is scope for a larger refactoring.
3031 (c) The code used strcasecmp() which is not a standard C function.
3032 Replaced with Exim's strcmpic() function.
3033 (d) The code set only $1; it now sets $auth1 as well.
3034 (e) A simple test gave the error "authentication client didn't specify
3035 service in request". It would seem that Dovecot has changed its
3036 interface. Fortunately there's a specification; I followed it and
3037 changed what the client sends and it appears to be working now.
3039 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3042 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3043 address A is aliased to B and C, where B exists and C does not. Without
3044 -v the output is "A verified" because verification stops after a
3045 successful redirection if more than one address is generated. However,
3046 with -v the child addresses are also verified. Exim was outputting "A
3047 failed to verify" and then showing the successful verification for C,
3048 with its parentage. It now outputs "B failed to verify", showing B's
3049 parentage before showing the successful verification of C.
3051 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3052 look up a TXT record in a specific list after matching in a combined
3055 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3056 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3057 they consult the DNS. I had assumed they would set it the way they
3058 wanted; and indeed my experiments on Linux seem to show that in some
3059 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3060 To be on the safe side, however, I have now made the interface to
3061 host_find_byname() similar to host_find_bydns(), with an argument
3062 containing the DNS resolver options. The host_find_byname() function now
3063 sets these options at its start, just as host_find_bydns() does. The smtp
3064 transport options dns_qualify_single and dns_search_parents are passed to
3065 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3066 of host_find_byname() use the default settings of RES_DEFNAMES
3067 (qualify_single) but not RES_DNSRCH (search_parents).
3069 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3070 spool_read_header() do less string testing, by means of a preliminary
3071 switch on the second character of optional "-foo" lines. (This is
3072 overdue, caused by the large number of possibilities that now exist.
3073 Originally there were few.) While I was there, I also converted the
3074 str(n)cmp tests so they don't re-test the leading "-" and the first
3075 character, in the hope this might squeeze out yet more improvement.
3077 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3078 flag allowing group syntax was set by the header_syntax check but not
3079 turned off, possible causing trouble later; (2) The flag was not being
3080 set at all for the header_verify test, causing "group"-style headers to
3081 be rejected. I have now set it in this case, and also caused header_
3082 verify to ignore an empty address taken from a group. While doing this, I
3083 came across some other cases where the code for allowing group syntax
3084 while scanning a header line wasn't quite right (mostly, not resetting
3085 the flag correctly in the right place). These bugs could have caused
3086 trouble for malformed header lines. I hope it is now all correct.
3088 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3089 with the "reply" argument non-NULL. The code, however (which originally
3090 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3091 but it didn't always do it. This confused somebody who was copying the
3092 code for some other use. I have removed all the tests.
3094 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3095 feature that was used to support insecure browsers during the U.S. crypto
3096 embargo. It requires special client support, and Exim is probably the
3097 only MTA that supported it -- and would never use it because real RSA is
3098 always available. This code has been removed, because it had the bad
3099 effect of slowing Exim down by computing (never used) parameters for the
3100 RSA_EXPORT functionality.
3102 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3103 authenticator to fail if there's a tab character in the incoming data
3104 (there should never be unless someone is messing about, as it's supposed
3105 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3106 if the connection is using TLS or if the remote IP is the same as the
3107 local IP, and the "valid-client-cert option" if a client certificate has
3110 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3111 authenticators. This can be used for authorization after authentication
3112 succeeds. (In the case of plaintext, it servers for both authentication
3115 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3116 if any retry times were supplied.
3118 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3119 connection, where there is no client IP address to check. In this
3120 situation, the verify now always succeeds.
3122 PH/25 Applied John Jetmore's -Mset patch.
3124 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3126 PH/27 In a string expansion for a processed (not raw) header when multiple
3127 headers of the same name were present, leading whitespace was being
3128 removed from all of them, but trailing whitespace was being removed only
3129 from the last one. Now trailing whitespace is removed from each header
3130 before concatenation. Completely empty headers in a concatenation (as
3131 before) are ignored.
3133 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3134 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3136 PH/29 [Removed. This was a change that I later backed out, and forgot to
3137 correct the ChangeLog entry (that I had efficiently created) before
3138 committing the later change.]
3140 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3141 address errors (4xx response to RCPT) over the same connection as other
3142 messages routed to the same hosts. Such deliveries are always "forced",
3143 so retry times are not inspected. This resulted in far too many retries
3144 for the affected addresses. The effect occurred only when there were more
3145 hosts than the hosts_max_try setting in the smtp transport when it had
3146 the 4xx errors. Those hosts that it had tried were not added to the list
3147 of hosts for which the message was waiting, so if all were tried, there
3148 was no problem. Two fixes have been applied:
3150 (i) If there are any address or message errors in an SMTP delivery, none
3151 of the hosts (tried or untried) are now added to the list of hosts
3152 for which the message is waiting, so the message should not be a
3153 candidate for sending over the same connection that was used for a
3154 successful delivery of some other message. This seems entirely
3155 reasonable: after all the message is NOT "waiting for some host".
3156 This is so "obvious" that I'm not sure why it wasn't done
3157 previously. Hope I haven't missed anything, but it can't do any
3158 harm, as the worst effect is to miss an optimization.
3160 (ii) If, despite (i), such a delivery is accidentally attempted, the
3161 routing retry time is respected, so at least it doesn't keep
3162 hammering the server.
3164 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3165 in ${readsocket because some servers need this prod.
3167 PH/32 Added some extra debug output when updating a wait-xxx database.
3169 PH/33 The hint "could be header name not terminated by colon", which has been
3170 given for certain expansion errors for a long time, was not being given
3171 for the ${if def:h_colon_omitted{... case.
3173 PH/34 The spec says: "With one important exception, whenever a domain list is
3174 being scanned, $domain contains the subject domain." There was at least
3175 one case where this was not true.
3177 PH/35 The error "getsockname() failed: connection reset by peer" was being
3178 written to the panic log as well as the main log, but it isn't really
3179 panic-worthy as it just means the connection died rather early on. I have
3180 removed the panic log writing for the ECONNRESET error when getsockname()
3183 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3184 runs only) independently of the message's sender address. This meant
3185 that, if the 4xx error was in fact related to the sender, a different
3186 message to the same recipient with a different sender could confuse
3187 things. In particular, this can happen when sending to a greylisting
3188 server, but other circumstances could also provoke similar problems.
3189 I have changed the default so that the retry time for these errors is now
3190 based a combination of the sender and recipient addresses. This change
3191 can be overridden by setting address_retry_include_sender=false in the
3194 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3195 remote server are returned as part of bounce messages. This was not
3196 happening for LMTP over a pipe (the lmtp transport), but now it is the
3197 same for both kinds of LMTP.
3199 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3200 in header lines that were in fact CNAMEs. This is no longer the case.
3202 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3203 and queue runs started by the daemon processed all messages. This has
3204 been fixed so that -R and -S can now usefully be given with -q<time>.
3206 PH/40 Import PCRE release 6.7 (fixes some bugs).
3208 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3210 PH/42 Give an error if -q is specified more than once.
3212 PH/43 Renamed the variables $interface_address and $interface_port as
3213 $received_ip_address and $received_port, to make it clear that these
3214 values apply to message reception, and not to the outgoing interface when
3215 a message is delivered. (The old names remain recognized, of course.)
3217 PH/44 There was no timeout on the connect() call when using a Unix domain
3218 socket in the ${readsocket expansion. There now is.
3220 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3221 be meaningful with "accept".
3223 SC/01 Eximstats V1.43
3224 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3226 SC/02 Eximstats V1.44
3227 Use a glob alias rather than an array ref in the generated
3228 parser. This improves both readability and performance.
3230 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3231 Collect SpamAssassin and rejection statistics.
3232 Don't display local sender or destination tables unless
3233 there is data to show.
3234 Added average volumes into the top table text output.
3236 SC/04 Eximstats V1.46
3237 Collect data on the number of addresses (recipients)
3238 as well as the number of messages.
3240 SC/05 Eximstats V1.47
3241 Added 'Message too big' to the list of mail rejection
3242 reasons (thanks to Marco Gaiarin).
3244 SC/06 Eximstats V1.48
3245 Mainlog lines which have GMT offsets and are too short to
3246 have a flag are now skipped.
3248 SC/07 Eximstats V1.49 (Alain Williams)
3249 Added the -emptyok flag.
3251 SC/08 Eximstats V1.50
3252 Fixes for obtaining the IP address from reject messages.
3254 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3255 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3256 whitespace changes from 4.64-PH/27
3258 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3261 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3262 are found, allow negative numbers in numeric criteria)
3264 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3266 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3267 to match changes made in 4.64-PH/43
3269 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3271 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3272 "domain" is actually an IP address, and force a failure. This locks out
3273 those revolvers/nameservers that support "A-for-A" lookups, in
3274 contravention of the specifications.
3276 PH/48 When a host name was looked up from an IP address, and the subsequent
3277 forward lookup of the name timed out, the host name was left in
3278 $sender_host_name, contrary to the specification.
3280 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3281 restricted to single-key lookups, Exim was not diagnosing an error if
3282 * or *@ was used with a query-style lookup.
3284 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3286 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3287 long ago, but noone interested enough thought of it. Let's just say that
3288 the "1.1" means that there are some new functions that weren't there at
3289 some point in the past.
3291 PH/51 Error processing for expansion failure of helo_data from an smtp
3292 transport during callout processing was broken.
3294 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3295 tested/used via the -bh/-bhc/-bs options.
3297 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3298 bug, fixed in subsequent PCRE releases).
3300 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3301 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3303 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3309 SC/01 Use a glob alias rather than an array ref in eximstats generated
3310 parser. This improves both readability and performance.
3312 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3313 Don't display local sender or destination tables in eximstats unless
3314 there is data to show.
3315 Added average volumes into the eximstats top table text output.
3317 SC/03 Collect data on the number of addresses (recipients) as well
3318 as the number of messages in eximstats.
3320 TF/01 Correct an error in the documentation for the redirect router. Exim
3321 does (usually) call initgroups() when daemonizing.
3323 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3324 with consistent privilege compared to when running as a daemon.
3326 TF/03 Note in the spec that $authenticated_id is not set for local
3327 submissions from trusted users.
3329 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3330 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3332 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3333 by adding some example configuration directives to the default
3334 configuration file. A little bit of work is required to uncomment the
3335 directives and define how usernames and passwords are checked, but
3336 there is now a framework to start from.
3338 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3339 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3340 without this. I don't know how relevant this is to other LDAP libraries.
3342 PH/02 Add the verb name to the "unknown ACL verb" error.
3344 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3346 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3348 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3349 directory not expanded when it should be if an expanded home directory
3350 was set for the address (which is overridden by the transport).
3352 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3355 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3356 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3357 because it is too late at that time, and has no effect.
3359 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3360 security issue with \' (bugzilla #107). I could not use the
3361 PQescapeStringConn() function, because it needs a PGconn value as one of
3364 PH/08 When testing addresses using -bt, indicate those final addresses that
3365 are duplicates that would not cause an additional delivery. At least one
3366 person was confused, thinking that -bt output corresponded to deliveries.
3367 (Suppressing duplicates isn't a good idea as you lose the information
3368 about possibly different redirections that led to the duplicates.)
3370 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3371 systems where poll() doesn't work, in particular OS X.
3373 PH/10 Added more information to debugging output for retry time not reached.
3375 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3376 operations in malware.c.
3378 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3381 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3382 syslog_duplication set false, log lines that would normally be written
3383 both the the main log and to the reject log were not written to syslog at
3386 PH/14 In the default configuration, change the use of "message" in ACL warn
3387 statements to "add_header".
3389 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3390 not followed by a command (e.g. "seen endif").
3392 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3393 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3396 PH/17 Added extra conditions to the default value of delay_warning_condition
3400 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3401 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3402 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3405 The Auto-Submitted: and various List- headers are standardised, whereas I
3406 don't think Precedence: ever was.
3408 PH/18 Refactored debugging code in route_finduser() to show more information,
3409 in particular, the error code if getpwnam() issues one.
3411 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3412 This is apparently needed in addition to the PH/07 change above to avoid
3413 any possible encoding problems.
3415 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3416 but not after initializing Perl.
3418 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3419 output them only if debugging. By default they are written stderr,
3420 apparently, which is not desirable.
3422 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3425 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3428 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3430 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3431 authenticated or an ident call has been made. Suppress the default
3432 values for $authenticated_id and $authenticated_sender (but permit -oMai
3433 and -oMas) when testing with -bh.
3435 PH/24 Re-jigged the order of the tests in the default configuration so that the
3436 tests for valid domains and recipients precede the DNS black list and CSA
3437 tests, on the grounds that those ones are more expensive.
3439 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3440 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3441 This bug exists in every version of Exim that I still have, right back to
3444 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3445 However, an attempt to turn on case-sensitivity in a regex key by
3446 including (?-i) didn't work because the subject string was already
3447 lowercased, and the effects were non-intuitive. It turns out that a
3448 one-line patch can be used to allow (?-i) to work as expected.
3454 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3455 other effects) broke the use of negated acl sub-conditions.
3457 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3460 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3461 "Deny" causes Exim to reject the incoming connection with a 554 error.
3462 Unfortunately, if there is a major crisis, such as a disk failure,
3463 tcp-wrappers gives "deny", whereas what one would like would be some
3464 kind of temporary error. A kludge has been added to help with this.
3465 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3466 554 error is used if errno is still zero or contains ENOENT (which occurs
3467 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3470 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3472 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3473 errors. Otherwise a message that provokes a temporary error (when other
3474 messages do not) can cause a whole host to time out.
3476 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3477 addresses were routed directly to files or pipes from a redirect router.
3478 File deliveries just didn't batch; pipe deliveries might have suffered
3481 PH/06 A failure to get a lock for a hints database would erroneously always say
3482 "Failed to get write lock", even when it was really a read lock.
3484 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3485 of 0600. This has been changed to use the value of the lockfile_mode
3486 option (which defaults to 0600).
3488 PH/08 Applied small patch from the Sieve maintainer.
3490 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3491 folder from quota calculations, a direct delivery into this folder messed
3492 up the contents of the maildirsize file. This was because the regex was
3493 used only to exclude .Trash (or whatever) when the size of the mailbox
3494 was calculated. There was no check that a delivery was happening into an
3495 excluded directory. This bug has been fixed by ignoring all quota
3496 processing for deliveries into excluded directories.
3498 PH/10 Added the maildirfolder_create_regex option to appendfile.
3504 PH/01 The code for finding all the local interface addresses on a FreeBSD
3505 system running IPv6 was broken. This may well have applied to all BSD
3506 systems, as well as to others that have similar system calls. The broken
3507 code found IPv4 interfaces correctly, but gave incorrect values for the
3508 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3509 that it would not match correctly against @[] and not recognize the IPv6
3512 PH/02 The ipliteral router was not recognizing addresses of the form user@
3513 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3515 PH/03 Added disable_ipv6.
3517 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3518 decoded form, because it is most often used to construct To: headers
3519 lines in autoreplies, and the decoded form may well be syntactically
3520 invalid. However, $reply_address has leading white space removed, and all
3521 newlines turned into spaces so that the autoreply transport does not
3524 PH/05 If group was specified without a user on a router, and no group or user
3525 was specified on a transport, the group from the router was ignored.
3527 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3528 for visible compile-time settings that can be used to change these
3529 numbers, for those that want even more. Backwards compatibility with old
3530 spool files has been maintained. However, going back to a previous Exim
3531 release will lost any variables that are in spool files.
3533 PH/07 Two small changes when running in the test harness: increase delay when
3534 passing a TCP/IP connection to a new process, in case the original
3535 process has to generate a bounce, and remove special handling of
3536 127.0.0.2 (sic), which is no longer necessary.
3538 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3539 be the same on different OS.
3541 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3544 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3545 whether --show-vars was specified or not
3547 JJ/02 exipick: Added support for new ACL variable spool format introduced
3550 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3551 syntactically invalid From: or Reply-to: line, and a filter used this to
3552 generate an autoreply, and therefore failed to obtain an address for the
3553 autoreply, Exim could try to deliver to a non-existent relative file
3554 name, causing unrelated and misleading errors. What now happens is that
3555 it logs this as a hard delivery error, but does not attempt to create a
3558 PH/11 The exinext utility has a -C option for testing purposes, but although
3559 the given file was scanned by exinext itself; it wasn't being passed on
3560 when Exim was called.
3562 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3563 an end-of-file indication when reading a command response.
3565 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3566 compiled. In many other places in Exim, IPv6 addresses are always
3567 recognized, so I have changed this. It also means that IPv4 domain
3568 literals of the form [IPV4:n.n.n.n] are now always recognized.
3570 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3571 used if the router is not running as root, for example, when verifying at
3572 ACL time, or when using -bh. The debugging output from this situation was
3573 non-existent - all you got was a failure to exec. I have made two
3576 (a) Failures to set uid/gid, the current directory, or a process leader
3577 in a subprocess such as that created by queryprogram now generate
3578 suitable debugging output when -d is set.
3580 (b) The queryprogram router detects when it is not running as root,
3581 outputs suitable debugging information if -d is set, and then runs
3582 the subprocess without attempting to change uid/gid.
3584 PH/15 Minor change to Makefile for building test_host (undocumented testing
3587 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3588 additional section of a DNS packet that returns MX or SRV records.
3589 Instead, it always explicitly searches for A/AAAA records. This avoids
3590 major problems that occur when a DNS server includes only records of one
3591 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3592 fixed another bug: if SRV records were looked up and the corresponding
3593 address records were *not* found in the additional section, the port
3594 values from the SRV records were lost.
3596 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3597 using the correct key (the original address) when searching the retry
3598 rules in order to find which one to use for generating the retry hint.
3600 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3601 adding the default one. Similarly, if it contains a Reply-To: header, the
3602 errors_reply_to option, if set, is not used.
3604 PH/19 When calculating a retry time, Exim used to measure the "time since
3605 failure" by looking at the "first failed" field in the retry record. Now
3606 it does not use this if it is later than than the arrival time of the
3607 message. Instead it uses the arrival time. This makes for better
3608 behaviour in cases where some deliveries succeed, thus re-setting the
3609 "first failed" field. An example is a quota failure for a huge message
3610 when small messages continue to be delivered. Without this change, the
3611 "time since failure" will always be short, possible causing more frequent
3612 delivery attempts for the huge message than are intended.
3613 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3615 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3616 $1, $2, $3) because the numerical variables can be reset during some
3617 expansion items (e.g. "match"), thereby losing the authentication data.
3619 PH/21 Make -bV show the size of off_t variables so that the test suite can
3620 decide whether to run tests for quotas > 2G.
3622 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3623 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3624 filecount value is greater than 2G or if a quota value is greater than 2G
3625 on a system where the size of off_t is not greater than 4, a panic error
3628 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3629 never match. The debug and -bh output now contains an explicit error
3630 message indicating a malformed IPv4 address or mask.
3632 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3633 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3634 PH/23 above applies.
3636 PH/25 Do not write to syslog when running in the test harness. The only
3637 occasion when this arises is a failure to open the main or panic logs
3638 (for which there is an explicit test).
3640 PH/26 Added the /no_tell option to "control=freeze".
3642 PH/27 If a host name lookup failed very early in a connection, for example, if
3643 the IP address matched host_lookup and the reverse lookup yielded a name
3644 that did not have a forward lookup, an error message of the form "no IP
3645 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3646 could be logged. Now it outputs the IP address instead of "NULL".
3648 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3649 allows the sender and the authenticated sender to be set when
3650 submitting a message from within Exim. Since child_open_exim() is
3651 documented for local_scan(), the new function should be too.
3653 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3654 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3655 results in an empty string is now treated as unset.
3657 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3659 PH/31 Added sender_verify_fail logging option.
3661 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3662 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3663 tidied the source and removed it altogether.
3665 PH/33 When a queue run was abandoned because the load average was too high, a
3666 log line was always written; now it is written only if the queue_run log
3667 selector is set. In addition, the log line for abandonment now contains
3668 information about the queue run such as the pid. This is always present
3669 in "start" and "stop" lines but was omitted from the "abandon" line.
3671 PH/34 Omit spaces between a header name and the colon in the error message that
3672 is given when verify = headers_syntax fails (if there are lots of them,
3673 the message gets confusing).
3675 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3676 names, as there are now some PTR records that contain slashes. This check
3677 is only to protect against broken name servers that fall over on strange
3678 characters, so the fact that it applies to all lookups doesn't matter.
3680 PH/36 Now that the new test suite is complete, we can remove some of the
3681 special code in Exim that was needed for the old test suite. For example,
3682 sorting DNS records because real resolvers return them in an arbitrary
3683 order. The new test suite's fake resolver always returns records in the
3686 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3687 bounces) except when queue_only is set, to avoid logging races between
3688 the different processes.
3690 PH/38 Panic-die if .include specifies a non-absolute path.
3692 PH/39 A tweak to the "H" retry rule from its user.
3694 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3695 a label. They prevented compilation on older perls.
3697 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3698 a warning to be raised on newish perls.
3700 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3701 on queue. Changes to match documented behaviour of showing count of
3702 messages matching specified criteria.
3704 PH/40 Changed the default ident timeout from 30s to 5s.
3706 PH/41 Added support for the use of login_cap features, on those BSD systems
3707 that have them, for controlling the resources used by pipe deliveries.
3709 PH/42 The content-scanning code uses fopen() to create files in which to put
3710 message data. Previously it was not paying any attention to the mode of
3711 the files. Exim runs with umask(0) because the rest of the code creates
3712 files with open(), and sets the required mode explicitly. Thus, these
3713 files were ending up world-writeable. This was not a big issue, because,
3714 being within the spool directory, they were not world-accessible. I have
3715 created a function called modefopen, which takes an additional mode
3716 argument. It sets umask(777), creates the file, chmods it to the required
3717 mode, then resets the umask. All the relevant calls to fopen() in the
3718 content scanning code have been changed to use this function.
3720 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3721 to 24 hours. This avoids potential overflow problems when processing G
3722 and H retry rules. I suspect nobody ever tinkers with this value.
3724 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3726 PH/45 When the plaintext authenticator is running as a client, the server's
3727 challenges are checked to ensure they are valid base64 strings. By
3728 default, the authentication attempt is cancelled if an invalid string is
3729 received. Setting client_ignore_invalid_base64 true ignores these errors.
3730 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3731 they are received. Thus, the responses can be made to depend on the
3732 challenges. If an invalid string is ignored, an empty string is placed in
3735 PH/46 Messages that are created by the autoreply transport now contains a
3736 References: header, in accordance with RFCs 2822 and 3834.
3738 PH/47 Added authenticated_sender_force to the smtp transport.
3740 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3742 PH/49 Installed latest patch from the Sieve maintainer.
3744 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3745 was also set, the appendfile transport was unnecessarily scanning a
3746 directory of message files (e.g. for maildir delivery) to find the count
3747 of files (along with the size), even though it did not need this
3748 information. It now does the scan only if it needs to find either the
3749 size of the count of files.
3751 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3753 PH/52 Two bugs concerned with error handling when the smtp transport is
3756 (i) Exim was not creating retry information for temporary errors given
3757 for individual recipients after the DATA command when the smtp transport
3758 was used in LMTP mode. This meant that they could be retried too
3759 frequently, and not timed out correctly.
3761 (ii) Exim was setting the flag that allows error details to be returned
3762 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3763 recipients that were returned after the DATA command.
3765 PH/53 This is related to PH/52, but is more general: for any failing address,
3766 when detailed error information was permitted to be returned to the
3767 sender, but the error was temporary, then after the final timeout, only
3768 "retry timeout exceeded" was returned. Now it returns the full error as
3769 well as "retry timeout exceeded".
3771 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3772 do this, and (what is worse) MTAs that accept it.
3774 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3775 will now be deprecated.
3777 PH/56 New os.c-cygwin from the Cygwin maintainer.
3779 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3780 formats (previously only available in exim formats via -bpr, -bpru,
3781 and -bpra. Now also available in native and exiqgrep formats)
3783 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3784 with very large, slow to parse queues
3786 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3788 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3790 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3791 responses to authentication challenges, though it was showing the
3792 challenges; (ii) I've removed the CR characters from the debug output for
3795 PH/58 Allow for the insertion of a newline as well as a space when a string
3796 is turned into more than one encoded-word during RFC 2047 encoding. The
3797 Sieve code now uses this.
3799 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3800 data_4xx, lost_connection, tls_required.
3802 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3803 message was being sent as an SMTP response.
3805 PH/61 Add -l and -k options to exicyclog.
3807 PH/62 When verifying, if an address was redirected to one new address, so that
3808 verification continued, and the new address failed or deferred after
3809 having set something in $address_data, the value of $address_data was not
3810 passed back to the ACL. This was different to the case when no
3811 redirection occurred. The value is now passed back in both cases.
3813 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3814 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3815 use login_cap.h, so on its own it isn't the distinguishing feature. The
3816 new name refers directly to the setclassresources() function.
3818 PH/65 Added configuration files for NetBSD3.
3820 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3822 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3823 is preferred over IPv4.
3825 PH/68 The bounce_return_message and bounce_return_body options were not being
3826 honoured for bounces generated during the reception of non-SMTP messages.
3827 In particular, this applied to messages rejected by the ACL. This bug has
3828 been fixed. However, if bounce_return_message is true and bounce_return_
3829 body is false, the headers that are returned for a non-SMTP message
3830 include only those that have been read before the error was detected.
3831 (In the case of an ACL rejection, they have all been read.)
3833 PH/69 The HTML version of the specification is now built in a directory called
3834 spec_html instead of spec.html, because the latter looks like a path with
3835 a MIME-type, and this confuses some software.
3837 PH/70 Catch two compiler warnings in sieve.c.
3839 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3840 function verify_get_ident() calls ip_connect() to connect a socket, but
3841 if the "connect()" function timed out, ip_connect() used to close the
3842 socket. However, verify_get_ident() also closes the socket later, and in
3843 between Exim writes to the log, which may get opened at this point. When
3844 the socket was closed in ip_connect(), the log could get the same file
3845 descriptor number as the socket. This naturally causes chaos. The fix is
3846 not to close the socket in ip_connect(); the socket should be closed by
3847 the function that creates it. There was only one place in the code where
3848 this was missing, in the iplookup router, which I don't think anybody now
3849 uses, but I've fixed it anyway.
3851 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3852 well as to direct DNS lookups. Otherwise the handling of names in host
3853 lists is inconsistent and therefore confusing.
3859 PH/01 Two changes to the default runtime configuration:
3861 (1) Move the checks for relay_from_hosts and authenticated clients from
3862 after to before the (commented out) DNS black list checks.
3864 (2) Add control=submission to the relay_from_hosts and authenticated
3865 clients checks, on the grounds that messages accepted by these
3866 statements are most likely to be submissions.
3868 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3870 (1) Generate an error if the third argument for the ${prvs expansion is
3873 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3876 (3) Reset the variables that are obtained from the first argument of
3877 ${prvscheck and used in the second argument before leaving the code,
3878 because their memory is reclaimed, so using them afterwards may do
3881 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3882 one (it's much easier than Tom thought :-).
3884 (5) Because of (4), we can now allow for the use of $prvscheck_result
3885 inside the third argument.
3887 PH/03 For some reason, the default setting of PATH when running a command from
3888 a pipe transport was just "/usr/bin". I have changed it to
3891 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3892 anything to be listed in the output from -bV.
3894 PH/05 When a filter generated an autoreply, the entire To: header line was
3895 quoted in the delivery log line, like this:
3897 => >A.N.Other <ano@some.domain> <original@ddress> ...
3899 This has been changed so that it extracts the operative address. There
3900 may be more than one such address. If so, they are comma-separated, like
3903 => >ano@some.domain,ona@other.domain <original@ddress> ...
3905 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3906 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3907 not being looked up in the rDNS to get a host name, Exim was showing the
3908 IP address twice in Received: lines, even though the IP addresses were
3909 identical. For example:
3911 Received: from [1.2.3.4] (helo=[1.2.3.4])
3913 However, if the real host name was known, it was omitting the HELO data
3914 if it matched the actual IP address. This has been tidied up so that it
3915 doesn't show the same IP address twice.
3917 PH/07 When both +timestamp and +memory debugging was on, the value given by
3918 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3919 called by the debug printing, thereby overwriting the timestamp buffer.
3920 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3922 PH/08 When the original message was included in an autoreply transport, it
3923 always said "this is a copy of the message, including all the headers",
3924 even if body_only or headers_only was set. It now gives an appropriate
3927 PH/09 Applied a patch from the Sieve maintainer which:
3929 o fixes some comments
3930 o adds the (disabled) notify extension core
3931 o adds some debug output for the result of if/elsif tests
3932 o points to the current vacation draft in the documentation
3933 and documents the missing references header update
3937 o fixes a bug in processing the envelope test (when testing
3938 multiple envelope elements, the last element determined the
3941 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3942 Electronic Mail") by including:
3944 Auto-submitted: auto-generated
3946 in the messages that it generates (bounce messages and others, such as
3947 warnings). In the case of bounce messages for non-SMTP messages, there was
3948 also a typo: it was using "Auto_submitted" (underscore instead of
3949 hyphen). Since every message generated by Exim is necessarily in response
3950 to another message, thes have all been changed to:
3952 Auto-Submitted: auto-replied
3954 in accordance with these statements in the RFC:
3956 The auto-replied keyword:
3958 - SHOULD be used on messages sent in direct response to another
3959 message by an automatic process,
3961 - MUST NOT be used on manually-generated messages,
3963 - MAY be used on Delivery Status Notifications (DSNs) and Message
3964 Disposition Notifications (MDNs),
3966 - MUST NOT be used on messages generated by automatic or periodic
3967 processes, except for messages which are automatic responses to
3970 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3971 to the default Received: header definition.
3973 PH/12 Added log selector acl_warn_skipped (default on).
3975 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3976 variables because (a) they are in the wrong storage pool and (b) even if
3977 they were copied, it wouldn't work properly because of the caching.
3979 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3980 checking when decoding. Apparently there are clients that generate
3981 overlong encoded strings. Why am I not surprised?
3983 PH/15 If the first argument of "${if match_address" was not empty, but did not
3984 contain an "@" character, Exim crashed. Now it writes a panic log message
3985 and treats the condition as false.
3987 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3989 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3990 extension "envelope-auth". The code is finished and in agreement with
3991 other implementations, but there is no documentation so far and in fact,
3992 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3993 not changing the active code.
3995 Print executed "if" and "elsif" statements when debugging is used. This
3996 helps a great deal to understand what a filter does.
3998 Document more things not specified clearly in RFC3028. I had all this
3999 sorted out, when out of a sudden new issues came to my mind. Oops."
4001 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4004 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4005 canonical form (as documented). However, after a host name lookup from
4006 the IP address, check_host() was doing a simple string comparison with
4007 addresses acquired from the DNS when checking that the found name did
4008 have the original IP as one of its addresses. Since any found IPv6
4009 addresses are likely to be in abbreviated form, the comparison could
4010 fail. Luckily, there already exists a function for doing the comparison
4011 by converting both addresses to binary, so now that is used instead of
4012 the text comparison.
4014 PH/20 There was another similar case to PH/19, when a complete host name was
4015 given in a host list; looking up its IP address could give an abbreviated
4016 form, whereas the current host's name might or might not be abbreviated.
4017 The same fix has been applied.
4023 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4024 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4027 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4028 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4030 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4032 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4033 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4034 Also, for "Auto-Submitted", treat anything other than "no" as
4035 non-personal, in accordance with RFC 3834. (Previously it treated
4036 anything starting "auto-" as non-personal.)
4038 TF/01 The control=submission/name=... option had a problem with syntax
4039 errors if the name included a slash character. The /name= option
4040 now slurps the rest of the string, so it can include any characters
4041 but it must come last in the list of options (after /sender_retain
4044 PH/05 Some modifications to the interface to the fake nameserver for the new
4052 TK/01 Added the "success_on_redirect" address verification option. See
4053 NewStuff for rationale and an example.
4055 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4057 PH/02 Patch to exigrep to allow it to work on syslog lines.
4059 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4060 fread() to skip over the body file's header line, because in Cygwin the
4061 header line is locked and is inaccessible.
4063 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4064 co-exist for some time) to make it clear that it is the Exim ID that is
4065 referenced, not the Message-ID: header line.
4067 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4068 string_format() function, because snprintf() does not exist on all
4071 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4072 ${stat: expansion item.
4074 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4075 protocol synchronization error", to keep the pedants happy.
4077 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4078 well as for IRIX systems, when gcc is being used. See the host.c source
4081 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4083 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4086 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4087 transport and to the smtp transport in LMTP mode.
4089 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4091 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4092 run a filter in a subprocess. This could lead to confusion in subsequent
4093 lookups in the parent process. There should also be a search_tidyup() at
4094 the end of the subprocess.
4096 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4097 only if the host matched helo_try_verify_hosts, which caused the
4098 verification to occur when the EHLO/HELO command was issued. The ACL just
4099 tested the remembered result. Now, if a previous verification attempt has
4100 not happened, "verify = helo" does it there and then.
4102 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4104 TK/03 Fix log output including CR from clamd.
4106 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4107 exist provoked a memory error which could cause a segfault.
4109 PH/15 Installed PCRE 6.2
4111 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4113 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4114 of the problem. Specifically, suggested +O2 rather than +O1 for the
4117 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4119 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4120 record, the port was not correctly logged when the outgoing_port log
4121 selector was set (it logged the transort's default port).
4123 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4124 fallback_hosts, and "hosts" in the smtp transport.
4126 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4127 host errors such as "Connection refused".
4129 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4130 authentication with radiusclient 0.4.9:
4132 - Error returned from rc_read_config was caught wrongly
4133 - Username/password not passed on to radius server due to wrong length.
4135 The presumption is that some radiusclient API changes for 4.51/PH/17
4136 were not taken care of correctly. The code is still untested by me (my
4137 Linux distribution still has 0.3.2 of radiusclient), but it was
4138 contributed by a Radius user.
4140 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4141 expanding the "port" option of the smtp transport.
4143 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4144 while reading a MIME header. Thanks to Tom Hughes for a patch.
4146 PH/24 Include config.h inside local_scan.h so that configuration settings are
4149 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4150 that in an ACL for RCPT (for example), you can examine exactly what was
4153 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4154 commands, but it was not correctly comparing the address with the actual
4155 client host address. Thus, it would show the EHLO address in Received:
4156 header lines when this was not necessary.
4158 PH/27 Added the % operator to ${eval:}.
4160 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4161 it should be ignoring failures (because with -C, for example, it has lost
4162 privilege). It wasn't ignoring creation failures other than "already
4165 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4168 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4169 because an input line was too long, either on its own, or by virtue of
4170 too many continuations, the temporary file was not being removed, and the
4171 return code was incorrect.
4173 PH/31 Missing "BOOL" in function definition in filtertest.c.
4175 PH/32 Applied Sieve patches from the maintainer.
4177 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4179 PH/33 Added "verify = not_blind".
4181 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4182 Local/Makefile (with some defaults set). These are used in built scripts
4183 such as exicyclog, but they have never been used in the exim_install
4184 script (though there are many overriding facilities there). I have
4185 arranged that the exim_install script now takes note of these two
4188 PH/35 Installed configuration files for Dragonfly.
4190 PH/36 When a locally submitted message by a trusted user did not contain a
4191 From: header, and the sender address was obtained from -f or from an SMTP
4192 MAIL command, and the trusted user did not use -F to supply a sender
4193 name, $originator_name was incorrectly used when constructing a From:
4194 header. Furthermore, $originator_name was used for submission mode
4195 messages from external hosts without From: headers in a similar way,
4196 which is clearly wrong.
4198 PH/37 Added control=suppress_local_fixups.
4200 PH/38 When log_selector = +received_sender was set, and the addition of the
4201 sender made the log line's construction buffer exactly full, or one byte
4202 less than full, an overflow happened when the terminating "\n" was
4205 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4206 when the result of a list match is failure because a DNS lookup failed.
4208 PH/40 RM_COMMAND is now used in the building process.
4210 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4211 the "build-* directories that it finds.
4213 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4214 address in a domain literal was a prefix of an interface address.
4216 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4217 when verifying a sender address, unless rewrite_headers is false.
4219 PH/44 Wrote a long comment about why errors_to addresses are verified as
4220 recipients, not senders.
4222 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4223 the ratelimit ACL was added.
4225 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4227 PH/46 Added extra information about PostgreSQL errors to the error string.
4229 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4230 avoiding the need to install special zones in a real server. This is
4231 backwards compatible; if it can't find the fake resolver, it drops back.
4232 Thus, both old and new test suites can be run.
4234 TF/02 Added util/ratelimit.pl
4236 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4237 clock is set back in time.
4239 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4240 Candler <B.Candler@pobox.com>.
4242 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4243 OK for addresses that are the result of redirections.
4245 PH/48 A number of further additions for the benefit of the new test suite,
4246 including a fake gethostbyname() that interfaces to the fake DNS resolver
4249 TF/06 The fix for widen_domains has also been applied to qualify_single and
4250 search_parents which are the other dnslookup options that can cause
4253 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4256 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4258 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4259 service" if it encountered an MX record with an empty target hostname.
4260 The message is now "an MX or SRV record indicated no SMTP service".
4262 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4263 if the DNS of the sending site is misconfigured. This is quite a
4264 common situation. This change restores the behaviour of treating a
4265 helo verification defer as a failure.
4267 PH/51 If self=fail was set on a router, the bounce message did not include the
4268 actual error message.
4274 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4276 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4277 command itself ended in error, the underlying message about the transport
4278 filter timeout was being overwritten with the pipe command error. Now the
4279 underlying error message should be appended to the second error message.
4281 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4283 PH/02 Reduce the amount of output that "make" produces by default. Full output
4284 can still be requested.
4286 PH/03 The warning log line about a condition test deferring for a "warn" verb
4287 was being output only once per connection, rather than after each
4288 occurrence (because it was using the same function as for successful
4289 "warn" verbs). This seems wrong, so I have changed it.
4291 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4292 it should not have, which might have caused a crash in the right
4293 circumstances, but probably never did.
4295 PH/04 Installed a modified version of Tony Finch's patch to make submission
4296 mode fix the return path as well as the Sender: header line, and to
4297 add a /name= option so that you can make the user's friendly name appear
4300 TF/03 Added the control = fakedefer ACL modifier.
4302 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4303 Mark Lowes for thorough testing.
4305 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4307 TK/03 Merged latest SRS patch from Miles Wilton.
4309 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4310 with the definition in sysexits.h (which is #included earlier).
4311 Fortunately, Exim does not actually use EX_OK. The code used to try to
4312 preserve the sysexits.h value, by assuming that macro definitions were
4313 scanned for macro replacements. I have been disabused of this notion,
4314 so now the code just undefines EX_OK before #including unistd.h.
4316 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4317 in the smtp transport. When a block could not be written in a single
4318 write() function, the timeout was being re-applied to each part-write.
4319 This seems wrong - if the receiver was accepting one byte at a time it
4320 would take for ever. The timeout is now adjusted when this happens. It
4321 doesn't have to be particularly precise.
4323 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4324 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4326 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4327 without a domain if the check to <postmaster@domain> fails.
4329 SC/01 Eximstats: added -xls and the ability to specify output files
4330 (patch written by Frank Heydlauf).
4332 SC/02 Eximstats: use FileHandles for outputting results.
4334 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4336 SC/04 Eximstats: fixed display of large numbers with -nvr option
4338 SC/05 Eximstats: fixed merging of reports with empty tables.
4340 SC/06 Eximstats: added the -include_original_destination flag
4342 SC/07 Eximstats: removed tabs and trailing whitespace.
4344 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4346 TK/06 MBOX spool code: Add real "From " MBOX separator line
4347 so the .eml file is really in mbox format (even though
4348 most programs do not really care). Patch from Alex Miller.
4350 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4351 The latter is generated from $received_to and is only set if the
4352 message has one envelope recipient. SA can use these headers,
4353 obviously out-of-the-box. Patch from Alex Miller.
4355 PH/08 The ${def test on a variable was returning false if the variable's
4356 value was "0", contrary to what the specification has always said!
4357 The result should be true unless the variable is empty.
4359 PH/09 The syntax error of a character other than { following "${if
4360 def:variable_name" (after optional whitespace) was not being diagnosed.
4361 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4362 accidental colon was present, for example, could give incorrect results.
4364 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4365 result is used (not including appendfile, where other changes are about
4368 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4369 This involved changing a lot of size variables from int to off_t. It
4370 should work with maildirs and everything.
4372 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4373 spamd dying while we are connected to it.
4375 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4378 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4379 function for BDB 4.3.
4381 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4383 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4384 the sources for PCRE have been re-arranged and more files are now
4387 PH/15 The code I had for printing potentially long long variables in PH/11
4388 above was not the best (it lost precision). The length of off_t variables
4389 is now inspected at build time, and an appropriate printing format (%ld
4390 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4391 to be "long long int" or "long int". This is needed for the internal
4392 formatting function string_vformat().
4394 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4395 the configuration file to be ":syslog", then the script "guesses" where
4396 the logs files are, rather than using the compiled in default. In our
4397 case the guess is not the same as the compiled default, so the script
4398 suddenly stopped working when I started to use syslog. The patch checks
4399 to see if log_file_path is "". If so, it attempts to read it from exim
4400 with no configuration file to get the compiled in version, before it
4401 falls back to the previous guessing code."
4403 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4404 implementing BATV in an Exim configuration. See NewStuff for the gory
4407 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4408 Makefile that are specific to HP-UX.
4410 PH/18 If the "use_postmaster" option was set for a recipient callout together
4411 with the "random" option, the postmaster address was used as the MAIL
4412 FROM address for the random test, but not for the subsequent recipient
4413 test. It is now used for both.
4415 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4416 patch removes a few documentation additions to RFC 3028, because the
4417 latest draft now contains them. It adds the new en;ascii-case comparator
4418 and a new error check for 8bit text in MIME parts. Comparator and
4419 require names are now matched exactly. I enabled the subaddress
4420 extension, but it is not well tested yet (read: it works for me)."
4422 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4423 rework some of the code of TK/09 above to avoid the hardwired use of
4424 "%lld" and "long long". Replaced the call to snprintf() with a call to
4427 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4428 records point to non-existent hosts", "retry timeout exceeded", and
4429 "retry time not reached for any host after a long failure period".
4431 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4432 experimental DomainKeys support:
4434 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4435 (2) On an error such as an illegally used "control", the wrong name for
4436 the control was given.
4438 These problems did NOT occur unless DomainKeys support was compiled.
4440 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4442 PH/24 Added ${if match_ip condition.
4444 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4445 databases so that it will be absolutely obvious if a crash occurs in the
4446 DB library. This is a regular occurrence (often caused by mis-matched
4449 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4450 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4451 picked up on a user's system that detects such things. There doesn't seem
4452 to be a gcc warning option for this - only an attribute that has to be
4453 put on the function's prototype. It seems that in Fedora Core 4 they have
4454 set this on a number of new functions. No doubt there will be more in due
4457 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4458 specify a transport. However, if an address that was verified by such a
4459 router was the subject of a callout, Exim crashed because it tried to
4460 read the rcpt_include_affixes from the non-existent transport. Now it
4461 just assumes that the setting of that option is false. This bug was
4462 introduced by 4.51/PH/31.
4464 PH/28 Changed -d+all to exclude +memory, because that information is very
4465 rarely of interest, but it makes the output a lot bigger. People tend to
4466 do -d+all out of habit.
4468 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4469 code in os-type was giving problems when libc.so lives in lib64, like on
4472 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4473 aren't the modern standard, and it seems that some systems' include files
4474 don't always have them. Exim was already checking for some of the newer
4475 ones like T_AAAA, and defining it itself. I've added checks for all the
4476 record types that Exim uses.
4478 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4479 not automatically generating a new one, as it is supposed to. This
4480 prevented TLS from working. If the file did exist, but contained invalid
4481 data, a new version was generated, as expected. It was only the case of a
4482 non-existent file that was broken.
4484 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4485 with a change in libdomainkeys > 0.64.
4487 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4488 from DNS. If the selector record carries the flag, it now has
4489 precedence over the domain-wide flag.
4491 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4493 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4494 the use of a port name that isn't defined in /etc/services) occurred, the
4495 message was deferred as in a normal delivery, and thus remained on the
4496 spool, instead of being failed because of the mua_wrapper setting. This
4497 is now fixed, and I tidied up some of the mua_wrapper messages at the
4500 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4501 the messages in a hash of arrays rather than using individual hashes.
4502 This is a bit cleaner and results in dramatic memory savings, albeit
4503 at a slight CPU cost.
4505 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4506 as requested by Marc Sherman.
4508 SC/10 Eximstats: added histograms for user specified patterns as requested
4511 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4513 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4514 fopen() in the content-scanning modules that did not already have it.
4520 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4521 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4523 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4525 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4527 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4528 to test Sieve filters that use "vacation".
4530 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4531 that changes the way the GnuTLS parameters are stored in the cache file.
4532 The new format can be generated externally. For backward compatibility,
4533 if the data in the cache doesn't make sense, Exim assumes it has read an
4534 old-format file, and it generates new data and writes a new file. This
4535 means that you can't go back to an older release without removing the
4538 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4539 work if there are any delivery delays because "one_time" forces the
4540 parent to be marked "delivered", so its unseen clone is never tried
4541 again. For this reason, Exim now forbids the simultaneous setting of
4544 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4545 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4546 entry if you want to know the details. The fix, however, neglected to
4547 consider the case when local delivery batching is involved. The test for
4548 "previously delivered" was not happening when checking to see if an
4549 address could be batched with a previous (undelivered) one; under
4550 certain circumstances this could lead to multiple deliveries to the same
4553 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4554 in its include files, and this causes problems building Exim.
4556 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4557 header_syntax) but Exim was just ignoring anything given after a slash.
4558 In particular, this caused confusion with an attempt to use "verify =
4559 reverse_host_lookup/defer_ok". An error is now given when options are
4560 supplied for verify items that do not have them. (Maybe reverse_host_
4561 lookup should have a defer_ok option, but that's a different point.)
4563 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4564 defined by RFC 821) to 2048, because there were problems with some AUTH
4565 commands, and RFC 1869 says the size should be increased for extended
4566 SMTP commands that take arguments.
4568 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4571 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4572 "unknown" error; now it says that the functionality isn't in the binary.
4574 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4575 an address' error message when a string expansion fails (syntax or
4576 whatever). Otherwise the password may appear in the log. Following change
4577 PH/42 below, there is no longer a chance of it appearing in a bounce
4580 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4582 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4583 of its addresses was ever tried. (Bugzilla bug #2.)
4585 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4586 the result incorrectly in the debug output. (It correctly added a newline
4587 to what was transported.)
4589 TF/01 Added $received_time.
4591 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4592 commented out examples of how to interface to a virus scanner and to
4593 SpamAssassin. Also added commented examples of av_scanner and
4594 spamd_address settings.
4596 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4597 and controls are allowed in which ACLs. There were a couple of minor
4598 errors. Some of the entries in the conditions table (which is a table of
4599 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4600 negation of where the condition IS allowed.
4602 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4604 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4605 header file does not have a version number, so I've had to invent a new
4606 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4607 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4608 radiusclient), but it was contributed by a Radius user.
4610 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4611 files or directories, for OpenSSL.
4613 PH/19 When an Exim process that is running as root has to create an Exim log
4614 file, it does so in a subprocess that runs as exim:exim so as to get the
4615 ownership right at creation (otherwise, other Exim processes might see
4616 the file with the wrong ownership). There was no test for failure of this
4617 fork() call, which would lead to the process getting stuck as it waited
4618 for a non-existent subprocess. Forks do occasionally fail when resources
4619 run out. I reviewed all the other calls to fork(); they all seem to check
4622 PH/20 When checking for unexpected SMTP input at connect time (before writing
4623 the banner), Exim was not dealing correctly with a non-positive return
4624 from the read() function. If the client had disconnected by this time,
4625 the result was a log entry for a synchronization error with an empty
4626 string after "input=" when read() returned zero. If read() returned -1
4627 (an event I could not check), uninitialized data bytes were printed.
4628 There were reports of junk text (parts of files, etc) appearing after
4631 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4633 PH/22 Added support for macro redefinition, and (re)definition in between
4634 driver and ACL definitions.
4636 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4637 forgetting to use the resulting value; it was using the unexpanded value.
4639 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4640 hadn't been configured. The fix is from Juergen Kreileder, who
4641 understands it better than I do:
4643 "Here's what I see happening with three configured cyrus_sasl
4644 authenticators configured (plain, login, cram-md5):
4646 On startup auth_cyrus_sasl_init() gets called for each of these.
4647 This means three calls to sasl_listmech() without a specified mech_list.
4648 => SASL tests which mechs of all available mechs actually work
4649 => three warnings about OTP not working
4650 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4652 With the patch, sasl_listmech() also gets called three times. But now
4653 SASL's mech_list option is set to the server_mech specified in the the
4654 authenticator. Or in other words, the answer from sasl_listmech()
4655 gets limited to just the mech you're testing for (which is different
4657 => the return list contains just 'plain' or 'login', 'cram-md5' or
4658 nothing depending on the value of ob->server_mech.
4660 I've just tested the patch: Authentication still works fine,
4661 unavailable mechs specified in the exim configuration are still
4662 caught, and the auth.log warnings about OTP are gone."
4664 PH/25 When debugging is enabled, the contents of the command line are added
4665 to the debugging output, even when log_selector=+arguments is not
4668 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4669 answer is "GNU", and only if the return is "GNU/something" is the answer
4672 PH/27 $acl_verify_message is now set immediately after the failure of a
4673 verification in an ACL, and so is available in subsequent modifiers. In
4674 particular, the message can be preserved by coding like this:
4676 warn !verify = sender
4677 set acl_m0 = $acl_verify_message
4679 Previously, $acl_verify_message was set only while expanding "message"
4680 and "log_message" when a very denied access.
4682 PH/28 Modified OS/os.c-Linux with
4684 -#ifndef OS_LOAD_AVERAGE
4685 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4687 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4688 nomenclature these days.)
4690 PH/29 Installed patch from the Sieve maintainer that adds the options
4691 sieve_useraddress and sieve_subaddress to the redirect router.
4693 PH/30 In these circumstances:
4694 . Two addresses routed to the same list of hosts;
4695 . First host does not offer TLS;
4696 . First host accepts first address;
4697 . First host gives temporary error to second address;
4698 . Second host offers TLS and a TLS session is established;
4699 . Second host accepts second address.
4700 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4701 and peerdn, if requested) that were in fact used only for the second
4704 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4705 attention to any local part prefix or suffix that was matched by the
4706 router that accepted the address. It now behaves in the same way as it
4707 does for delivery: the affixes are removed from the local part unless
4708 rcpt_include_affixes is set on the transport.
4710 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4711 timeout during the DATA phase of an incoming message.
4713 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4714 applied a patch sanctioned by the Sieve maintainer.
4716 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4717 the uid or gid is negative. A case of a negative gid caused this to be
4718 noticed. The fix allows for either to be negative.
4720 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4721 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4724 PH/36 The change PH/12 above was broken. Fixed it.
4726 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4727 the grounds that routing the same address twice would always produce the
4728 same answer. This might have been true once, but it is certainly no
4729 longer true now. Routing a child address may depend on the previous
4730 routing that produced that child. Some complicated redirection strategies
4731 went wrong when messages had multiple recipients, and made Exim's
4732 behaviour dependent on the order in which the addresses were given.
4734 I have moved the duplicate checking until after the routing is complete.
4735 Exim scans the addresses that are assigned to local and remote
4736 transports, and removes any duplicates. This means that more work will be
4737 done, as duplicates will always all be routed, but duplicates are
4738 presumably rare, so I don't expect this is of any significance.
4740 For deliveries to pipes, files, and autoreplies, the duplicate checking
4741 still happens during the routing process, since they are not going to be
4744 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4745 It corrects a timeout issue with spamd. This is Ian's comment: "The
4746 background is that sometimes spamd either never reads data from a
4747 connection it has accepted, or it never writes response data. The exiscan
4748 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4749 blindly assumes that writes won't block so it may never time out."
4751 PH/39 Allow G after quota size as well as K and M.
4753 PH/40 The value set for $authenticated_id in an authenticator may not contain
4754 binary zeroes or newlines because the value is written to log lines and
4755 to spool files. There was no check on this. Now the value is run through
4756 the string_printing() function so that such characters are converted to
4757 printable escape sequences.
4759 PH/41 $message_linecount is a new variable that contains the total number of
4760 lines in the message. Compare $body_linecount, which is the count for the
4763 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4764 bounce and delay warning messages, except in certain special cases, which
4767 (a) An SMTP error message from a remote host;
4768 (b) A message specified in a :fail: redirection;
4769 (c) A message specified in a "fail" command in a system filter;
4770 (d) A message specified in a FAIL return from the queryprogram router;
4771 (e) A message specified by the cannot_route_message router option.
4773 In these cases only, Exim does include the error details in bounce and
4774 warning messages. There are also a few cases where bland messages such
4775 as "unrouteable address" or "local delivery error" are given.
4777 PH/43 $value is now also set for the "else" part of a ${run expansion.
4779 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4780 being worked on, but at least Exim now implements the latest version to
4783 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4784 process to complete was treated as a delivery failure, a timeout while
4785 writing the message to the pipe was logged, but erroneously treated as a
4786 successful delivery. Such timeouts include transport filter timeouts. For
4787 consistency with the overall process timeout, these timeouts are now
4788 treated as errors, giving rise to delivery failures by default. However,
4789 there is now a new Boolean option for the pipe transport called
4790 timeout_defer, which, if set TRUE, converts the failures into defers for
4791 both kinds of timeout. A transport filter timeout is now identified in
4794 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4795 systems where "make" and "gmake" are different, calling "gmake" at top
4796 level broke things. I've arranged for the value of $(MAKE) to be passed
4797 from the Makefile to this script so that it can call the same version of
4801 A note about Exim versions 4.44 and 4.50
4802 ----------------------------------------
4804 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4805 changes of various kinds. As a consequence, a big documentation update was
4806 needed. This delayed the release for rather longer than seemed good, especially
4807 in the light of a couple of (minor) security issues. Therefore, the changes
4808 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4809 release. So 4.44 and 4.50 are in effect two different branches that both start
4812 I have left the 4.50 change log unchanged; it contains all the changes since
4813 4.43. The change log for 4.44 is below; many of its items are identical to
4814 those for 4.50. This seems to be the most sensible way to preserve the
4815 historical information.
4821 1. Minor wording change to the doc/README.SIEVE file.
4823 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4824 computation of the current number of files was incorrect.
4826 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4827 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4830 4. Give more explanation in the error message when the command for a transport
4831 filter fails to execute.
4833 5. There are several places where Exim runs a non-Exim command in a
4834 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4835 was being done only for the command run by the queryprogram router. It is
4836 now done for all such subprocesses. The other cases are: ${run, transport
4837 filters, and the commands run by the lmtp and pipe transports.
4839 6. Added CONFIGURE_GROUP build-time option.
4841 7. Some older OS have a limit of 256 on the maximum number of file
4842 descriptors. Exim was using setrlimit() to set 1000 as a large value
4843 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4844 systems. I've change it so that if it can't get 1000, it tries for 256.
4846 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4847 was an oversight, and furthermore, ever since the addition of extra
4848 controls (e.g. 4.43/32), the checks on when to allow different forms of
4849 "control" were broken. There should now be diagnostics for all cases when a
4850 control that does not make sense is encountered.
4852 9. Added the /retain_sender option to "control=submission".
4854 10. $recipients is now available in the predata ACL (oversight).
4856 11. Tidy the search cache before the fork to do a delivery from a message
4857 received from the command line. Otherwise the child will trigger a lookup
4858 failure and thereby defer the delivery if it tries to use (for example) a
4859 cached ldap connection that the parent has called unbind on.
4861 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4862 of $address_data from the recipient verification was clobbered by the
4863 sender verification.
4865 13. The value of address_data from a sender verification is now available in
4866 $sender_address_data in subsequent conditions in the ACL statement.
4868 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4870 15. Added a new option "connect=<time>" to callout options, to set a different
4873 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4874 was its contents. (It was OK if the option was not defined at all.)
4876 17. A "Completed" log line is now written for messages that are removed from
4877 the spool by the -Mrm option.
4879 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4880 information about exactly what failed.
4882 19. Added -dd to debug only the daemon process.
4884 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4885 handles timeouts, both on the server side and network timeouts. Renamed the
4886 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4888 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4889 It is now set to "smtps".
4891 22. $host_address is now set to the target address during the checking of
4892 ignore_target_hosts.
4894 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4895 being passed; this would have caused $sender_host_name to have been used if
4896 matching the list had actually called for a host name (not very likely,
4897 since this list is usually IP addresses). A host name is now passed as
4900 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4901 code that specifies a non-restarting handler (typically sigaction() in
4902 modern systems) in an attempt to fix a rare and obscure crash bug.
4904 25. Narrowed the window for a race in the daemon that could cause it to ignore
4905 SIGCHLD signals. This is not a major problem, because they are used only to
4906 wake it up if nothing else does.
4908 26. A malformed maildirsize file could cause Exim to calculate negative values
4909 for the mailbox size or file count. Odd effects could occur as a result.
4910 The maildirsize information is now recalculated if the size or filecount
4913 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4914 support for a long time. Removed HAVE_SYS_VFS_H.
4916 28. Installed the latest version of exipick from John Jetmore.
4918 29. In an address list, if the pattern was not a regular expression, an empty
4919 subject address (from a bounce message) matched only if the pattern was an
4920 empty string. Non-empty patterns were not even tested. This was the wrong
4921 because it is perfectly reasonable to use an empty address as part of a
4922 database query. An empty address is now tested by patterns that are
4923 lookups. However, all the other forms of pattern expect the subject to
4924 contain a local part and a domain, and therefore, for them, an empty
4925 address still always fails if the pattern is not itself empty.
4927 30. Exim went into a mad DNS loop when attempting to do a callout where the
4928 host was specified on an smtp transport, and looking it up yielded more
4929 than one IP address.
4931 31. Re-factored the code for checking spool and log partition space into a
4932 function that finds that data and another that does the check. The former
4933 is then used to implement four new variables: $spool_space, $log_space,
4934 $spool_inodes, and $log_inodes.
4936 32. The RFC2047 encoding function was originally intended for short strings
4937 such as real names; it was not keeping to the 75-character limit for
4938 encoded words that the RFC imposes. It now respects the limit, and
4939 generates multiple encoded words if necessary. To be on the safe side, I
4940 have increased the buffer size for the ${rfc2047: expansion operator from
4943 33. It is now permitted to omit both strings after an "if" condition; if the
4944 condition is true, the result is "true". As before, when the second string
4945 is omitted, a false condition yields an empty string. This makes it less
4946 cumbersome to write custom ACL and router conditions.
4948 34. Failure to deliver a bounce message always caused it to be frozen, even if
4949 there was an errors_to setting on the router. The errors_to setting is now
4952 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4953 canonical form (fully expanded) before being placed in
4954 $sender_host_address.
4956 36. The table in the code that translates DNS record types into text (T_A to
4957 "A" for instance) was missing entries for NS and CNAME. It is just possible
4958 that this could have caused confusion if both these types were looked up
4959 for the same domain, because the text type is used as part of Exim's
4960 per-process caching. But the chance of anyone hitting this buglet seems
4963 37. The dnsdb lookup has been extended in a number of ways.
4965 (1) There is a new type, "zns", which walks up the domain tree until it
4966 finds some nameserver records. It should be used with care.
4968 (2) There is a new type, "mxh", which is like "mx" except that it returns
4969 just the host names, not the priorities.
4971 (3) It is now possible to give a list of domains (or IP addresses) to be
4972 looked up. The behaviour when one of the lookups defers can be
4973 controlled by a keyword.
4975 (4) It is now possible to specify the separator character for use when
4976 multiple records are returned.
4978 38. The dnslists ACL condition has been extended: it is now possible to supply
4979 a list of IP addresses and/or domains to be looked up in a particular DNS
4982 39. Added log_selector=+queue_time_overall.
4984 40. When running the queue in the test harness, wait just a tad after forking a
4985 delivery process, to get repeatability of debugging output.
4987 41. Include certificate and key file names in error message when GnuTLS fails
4988 to set them up, because the GnuTLS error message doesn't include the name
4989 of the failing file when there is a problem reading it.
4991 42. Allow both -bf and -bF in the same test run.
4993 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4995 44. The "Exiscan patch" is now merged into the mainline Exim source.
4997 45. Sometimes the final signoff response after QUIT could fail to get
4998 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4999 < 0 before doing a fflush(). This bug looks as though it goes back to the
5000 introduction of TLS in release 3.20, but "sometimes" must have been rare
5001 because the tests only now provoked it.
5003 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5004 (this can affect the format of dates).
5006 47. exim_tidydb, when checking for the continued existence of a message for
5007 which it has found a message-specific retry record, was not finding
5008 messages that were in split spool directories. Consequently, it was
5009 deleting retry records that should have stayed in existence.
5011 48. Steve fixed some bugs in eximstats.
5013 49. The SPA authentication driver was not abandoning authentication and moving
5014 on to the next authenticator when an expansion was forced to fail,
5015 contradicting the general specification for all authenticators. Instead it
5016 was generating a temporary error. It now behaves as specified.
5018 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5019 (the order specifies the preference for clients). The order is now AES256,
5020 AES128, 3DES, ARCFOUR128.
5022 51. Small patch to Sieve code - explicitly set From: when generating an
5025 52. Exim crashed if a remote delivery caused a very long error message to be
5026 recorded - for instance if somebody sent an entire SpamAssassin report back
5027 as a large number of 550 error lines. This bug was coincidentally fixed by
5028 increasing the size of one of Exim's internal buffers (big_buffer) that
5029 happened as part of the Exiscan merge. However, to be on the safe side, I
5030 have made the code more robust (and fixed the comments that describe what
5033 53. Now that there can be additional text after "Completed" in log lines (if
5034 the queue_time_overall log selector is set), a one-byte patch to exigrep
5035 was needed to allow it to recognize "Completed" as not the last thing in
5038 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5039 patch that reportedly fixes this has been added. I am not expert enough to
5040 create a test for it. This is what the patch creator wrote:
5042 "I found a little strange behaviour of ldap code when working with
5043 Windows 2003 AD Domain, where users was placed in more than one
5044 Organization Units. When I tried to give exim partial DN, the exit code
5045 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5046 But simultaneously result of request was absolutely normal ldap result,
5047 so I produce this patch..."
5049 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5050 REFERENCE, so I have modified the code to exclude the patch when that macro
5053 55. Some experimental protocols are using DNS PTR records for new purposes. The
5054 keys for these records are domain names, not reversed IP addresses. The
5055 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5056 leaves it alone. Component reversal etc. now happens only for IP addresses.
5059 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5061 57. Double the size of the debug message buffer (to 2048) so that more of very
5062 long debug lines gets shown.
5064 58. The exicyclog utility now does better if the number of log files to keep
5065 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5067 59. Two changes related to the smtp_active_hostname option:
5069 (1) $smtp_active_hostname is now available as a variable.
5070 (2) The default for smtp_banner uses $smtp_active_hostname instead
5071 of $primary_hostname.
5073 60. The host_aton() function is supposed to be passed a string that is known
5074 to be a valid IP address. However, in the case of IPv6 addresses, it was
5075 not checking this. This is a hostage to fortune. Exim now panics and dies
5076 if the condition is not met. A case was found where this could be provoked
5077 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5078 components; fortuitously, this particular loophole had already been fixed
5079 by change 4.50/55 above.
5081 If there are any other similar loopholes, the new check in host_aton()
5082 itself should stop them being exploited. The report I received stated that
5083 data on the command line could provoke the exploit when Exim was running as
5084 exim, but did not say which command line option was involved. All I could
5085 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5086 running as the user.
5089 61. There was a buffer overflow vulnerability in the SPA authentication code
5090 (which came originally from the Samba project). I have added a test to the
5091 spa_base64_to_bits() function which I hope fixes it.
5094 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5095 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5097 63. The daemon start-up calls getloadavg() while still root for those OS that
5098 need the first call to be done as root, but it missed one case: when
5099 deliver_queue_load_max is set with deliver_drop_privilege. This is
5100 necessary for the benefit of the queue runner, because there is no re-exec
5101 when deliver_drop_privilege is set.
5103 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5104 This has been fixed.
5106 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5107 was in use, was not putting the data itself into the right store pool;
5108 consequently, it could be overwritten for a subsequent message in the same
5109 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5112 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5114 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5115 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5116 the function were treating the return as a boolean value, which happened to
5117 work because 0=false and not-0=true, but is not correct code.
5119 68. The host_aton() function was not handling scoped IPv6 addresses (those
5120 with, for example, "%eth0" on the end) correctly.
5122 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5123 negated items (that is, ~something) in unsigned ints. Some compilers
5124 apparently mutter when there is no cast.
5126 70. If an address verification called from an ACL failed, and did not produce a
5127 user-specific message (i.e. there was only a "system" message), nothing was
5128 put in $acl_verify_message. In this situation, it now puts the system
5131 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5132 session; change 4.31/43 added the unwanted input to the log line - except
5133 that it did not do this in the start of session case. It now does.
5135 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5136 This is wrong and can cause the other end to generate a synchronization
5137 error if it is another Exim or anything else that does the synchronization
5138 check. A QUIT command is no longer sent after a timeout.
5140 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5141 during host lookups.
5143 74. The defer_ok option of callout verification was not working if it was used
5144 when verifying addresses in header lines, that is, for this case:
5146 verify = header_sender/callout=defer_ok
5148 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5149 those file descriptors could be used for SMTP connections. If anything
5150 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5151 could be sent to the SMTP client, causing chaos. The daemon now opens
5152 stdin, stdout, and stderr to /dev/null when it puts itself into the
5155 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5156 log by default. The user can override this with suitable Perl magic.
5158 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5159 the log message when discard triggers, was not working for the DATA ACL or
5160 for the non-SMTP ACL.
5162 78. Error message wording change in sieve.c.
5164 79. If smtp_accept_max_per_host was set, the number of connections could be
5165 restricted to fewer than expected, because the daemon was trying to set up
5166 a new connection before checking whether the processes handling previous
5167 connections had finished. The check for completed processes is now done
5168 earlier. On busy systems, this bug wouldn't be noticed because something
5169 else would have woken the daemon, and it would have reaped the completed
5172 80. If a message was submitted locally by a user whose login name contained one
5173 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5174 It caused a spool format error. I have fixed the spool reading code. A
5175 related problem was that the "from" clause in the Received: line became
5176 illegal because of the space(s). It is now covered by ${quote_local_part.
5178 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5181 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5183 83. Patch from Sieve maintainer to fix unterminated string problem in
5184 "vacation" handling.
5186 84. Some minor changes to the Linux configuration files to help with other
5187 OS variants using glibc.
5189 85. One more patch for Sieve to update vacation handling to latest spec.
5192 ----------------------------------------------------
5193 See the note above about the 4.44 and 4.50 releases.
5194 ----------------------------------------------------
5200 1. Change 4.43/35 introduced a bug that caused file counts to be
5201 incorrectly computed when quota_filecount was set in an appendfile
5204 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5205 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5208 3. Give more explanation in the error message when the command for a transport
5209 filter fails to execute.
5211 4. There are several places where Exim runs a non-Exim command in a
5212 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5213 was being done only for the command run by the queryprogram router. It is
5214 now done for all such subprocesses. The other cases are: ${run, transport
5215 filters, and the commands run by the lmtp and pipe transports.
5217 5. Some older OS have a limit of 256 on the maximum number of file
5218 descriptors. Exim was using setrlimit() to set 1000 as a large value
5219 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5220 systems. I've change it so that if it can't get 1000, it tries for 256.
5222 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5223 was an oversight, and furthermore, ever since the addition of extra
5224 controls (e.g. 4.43/32), the checks on when to allow different forms of
5225 "control" were broken. There should now be diagnostics for all cases when a
5226 control that does not make sense is encountered.
5228 7. $recipients is now available in the predata ACL (oversight).
5230 8. Tidy the search cache before the fork to do a delivery from a message
5231 received from the command line. Otherwise the child will trigger a lookup
5232 failure and thereby defer the delivery if it tries to use (for example) a
5233 cached ldap connection that the parent has called unbind on.
5235 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5236 of $address_data from the recipient verification was clobbered by the
5237 sender verification.
5239 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5240 was its contents. (It was OK if the option was not defined at all.)
5242 11. A "Completed" log line is now written for messages that are removed from
5243 the spool by the -Mrm option.
5245 12. $host_address is now set to the target address during the checking of
5246 ignore_target_hosts.
5248 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5249 being passed; this would have caused $sender_host_name to have been used if
5250 matching the list had actually called for a host name (not very likely,
5251 since this list is usually IP addresses). A host name is now passed as
5254 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5255 code that specifies a non-restarting handler (typically sigaction() in
5256 modern systems) in an attempt to fix a rare and obscure crash bug.
5258 15. Narrowed the window for a race in the daemon that could cause it to ignore
5259 SIGCHLD signals. This is not a major problem, because they are used only to
5260 wake it up if nothing else does.
5262 16. A malformed maildirsize file could cause Exim to calculate negative values
5263 for the mailbox size or file count. Odd effects could occur as a result.
5264 The maildirsize information is now recalculated if the size or filecount
5267 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5268 support for a long time. Removed HAVE_SYS_VFS_H.
5270 18. Updated exipick to current release from John Jetmore.
5272 19. Allow an empty sender to be matched against a lookup in an address list.
5273 Previously the only cases considered were a regular expression, or an
5276 20. Exim went into a mad DNS lookup loop when doing a callout where the
5277 host was specified on the transport, if the DNS lookup yielded more than
5280 21. The RFC2047 encoding function was originally intended for short strings
5281 such as real names; it was not keeping to the 75-character limit for
5282 encoded words that the RFC imposes. It now respects the limit, and
5283 generates multiple encoded words if necessary. To be on the safe side, I
5284 have increased the buffer size for the ${rfc2047: expansion operator from
5287 22. Failure to deliver a bounce message always caused it to be frozen, even if
5288 there was an errors_to setting on the router. The errors_to setting is now
5291 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5292 canonical form (fully expanded) before being placed in
5293 $sender_host_address.
5295 24. Updated eximstats to version 1.33
5297 25. Include certificate and key file names in error message when GnuTLS fails
5298 to set them up, because the GnuTLS error message doesn't include the name
5299 of the failing file when there is a problem reading it.
5301 26. Expand error message when OpenSSL has problems setting up cert/key files.
5304 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5305 (this can affect the format of dates).
5307 28. exim_tidydb, when checking for the continued existence of a message for
5308 which it has found a message-specific retry record, was not finding
5309 messages that were in split spool directories. Consequently, it was
5310 deleting retry records that should have stayed in existence.
5312 29. eximstats updated to version 1.35
5313 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5314 1.35 - bugfix such that pie charts by volume are generated correctly
5316 30. The SPA authentication driver was not abandoning authentication and moving
5317 on to the next authenticator when an expansion was forced to fail,
5318 contradicting the general specification for all authenticators. Instead it
5319 was generating a temporary error. It now behaves as specified.
5321 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5322 (the order specifies the preference for clients). The order is now AES256,
5323 AES128, 3DES, ARCFOUR128.
5325 31. Small patch to Sieve code - explicitly set From: when generating an
5328 32. Exim crashed if a remote delivery caused a very long error message to be
5329 recorded - for instance if somebody sent an entire SpamAssassin report back
5330 as a large number of 550 error lines. This bug was coincidentally fixed by
5331 increasing the size of one of Exim's internal buffers (big_buffer) that
5332 happened as part of the Exiscan merge. However, to be on the safe side, I
5333 have made the code more robust (and fixed the comments that describe what
5336 33. Some experimental protocols are using DNS PTR records for new purposes. The
5337 keys for these records are domain names, not reversed IP addresses. The
5338 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5339 leaves it alone. Component reversal etc. now happens only for IP addresses.
5342 34. The host_aton() function is supposed to be passed a string that is known
5343 to be a valid IP address. However, in the case of IPv6 addresses, it was
5344 not checking this. This is a hostage to fortune. Exim now panics and dies
5345 if the condition is not met. A case was found where this could be provoked
5346 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5347 components; fortuitously, this particular loophole had already been fixed
5348 by change 4.50/55 or 4.44/33 above.
5350 If there are any other similar loopholes, the new check in host_aton()
5351 itself should stop them being exploited. The report I received stated that
5352 data on the command line could provoke the exploit when Exim was running as
5353 exim, but did not say which command line option was involved. All I could
5354 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5355 running as the user.
5358 35. There was a buffer overflow vulnerability in the SPA authentication code
5359 (which came originally from the Samba project). I have added a test to the
5360 spa_base64_to_bits() function which I hope fixes it.
5363 36. The daemon start-up calls getloadavg() while still root for those OS that
5364 need the first call to be done as root, but it missed one case: when
5365 deliver_queue_load_max is set with deliver_drop_privilege. This is
5366 necessary for the benefit of the queue runner, because there is no re-exec
5367 when deliver_drop_privilege is set.
5369 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5370 was in use, was not putting the data itself into the right store pool;
5371 consequently, it could be overwritten for a subsequent message in the same
5372 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5375 38. Sometimes the final signoff response after QUIT could fail to get
5376 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5377 < 0 before doing a fflush(). This bug looks as though it goes back to the
5378 introduction of TLS in release 3.20, but "sometimes" must have been rare
5379 because the tests only now provoked it.
5385 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5386 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5387 Now it returns an integer. A number of calls were still expecting a T/F
5388 return. Fortuitously, in all cases, the tests worked in OK situations,
5389 which is the norm. However, things would have gone wrong on any write
5390 failures on the smtp file descriptor. This function is used when sending
5391 messages over SMTP and also when doing verify callouts.
5393 2. When Exim is called to do synchronous delivery of a locally submitted
5394 message (the -odf or -odi options), it no longer closes stderr before doing
5397 3. Implemented the mua_wrapper option.
5399 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5401 5. Implemented the functions header_remove(), header_testname(),
5402 header_add_at_position(), and receive_remove_recipient(), and exported them
5405 6. If an ACL "warn" statement specified the addition of headers, Exim already
5406 inserted X-ACL-Warn: at the start if there was no header name. However, it
5407 was not making this test for the second and subsequent header lines if
5408 there were newlines in the string. This meant that an invalid header could
5409 be inserted if Exim was badly configured.
5411 7. Allow an ACL "warn" statement to add header lines at the start or after all
5412 the Received: headers, as well as at the end.
5414 8. Added the rcpt_4xx retry error code.
5416 9. Added postmaster_mailfrom=xxx to callout verification option.
5418 10. Added mailfrom=xxxx to the callout verification option, for verify=
5421 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5422 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5424 12. Inserted some casts to stop certain compilers warning when using pointer
5425 differences as field lengths or precisions in printf-type calls (mostly
5426 affecting debugging statements).
5428 13. Added optional readline() support for -be (dynamically loaded).
5430 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5431 same clock tick as a message's arrival, so that its received time was the
5432 same as the "first fail" time on the retry record, and that message
5433 remained on the queue past the ultimate address timeout, every queue runner
5434 would try a delivery (because it was past the ultimate address timeout) but
5435 after another failure, the ultimate address timeout, which should have then
5436 bounced the address, did not kick in. This was a "< instead of <=" error;
5437 in most cases the first failure would have been in the next clock tick
5438 after the received time, and all would be well.
5440 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5441 being recognized when the domain list was tested by the match_domain
5442 condition in an expansion string.
5444 16. Added the ${str2b64: operator.
5446 17. Exim was always calling setrlimit() to set a large limit for the number of
5447 processes, without checking whether the existing limit was already
5448 adequate. (It did check for the limit on file descriptors.) Furthermore,
5449 errors from getrlimit() and setrlimit() were being ignored. Now they are
5450 logged to the main and panic logs, but Exim does carry on, to try to do its
5451 job under whatever limits there are.
5453 18. Imported PCRE 5.0.
5455 19. Trivial typo in log message " temporarily refused connection" (the leading
5458 20. If the log selector return_path_on_delivery was set and an address was
5459 redirected to /dev/null, the delivery process crashed because it assumed
5460 that a return path would always be set for a "successful" delivery. In this
5461 case, the whole delivery is bypassed as an optimization, and therefore no
5464 21. Internal re-arrangement: the function for sending a challenge and reading
5465 a response while authentication was assuming a zero-terminated challenge
5466 string. It's now changed to take a pointer and a length, to allow for
5467 binary data in such strings.
5469 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5471 23. Exim was not respecting finduser_retries when seeking the login of the
5472 uid under which it was called; it was always trying 10 times. (The default
5473 setting of finduser_retries is zero.) Also, it was sleeping after the final
5474 failure, which is pointless.
5476 24. Implemented tls_on_connect_ports.
5478 25. Implemented acl_smtp_predata.
5480 26. If the domain in control=submission is set empty, Exim assumes that the
5481 authenticated id is a complete email address when it generates From: or
5482 Sender: header lines.
5484 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5485 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5486 chown and chgrp in /bin and hostname in /usr/bin.
5488 28. Exim was keeping the "process log" file open after each use, just as it
5489 does for the main log. This opens the possibility of it remaining open for
5490 long periods when the USR1 signal hits a daemon. Occasional processlog
5491 errors were reported, that could have been caused by this. Anyway, it seems
5492 much more sensible not to leave this file open at all, so that is what now
5495 29. The long-running daemon process does not normally write to the log once it
5496 has entered its main loop, and it closes the log before doing so. This is
5497 so that log files can straightforwardly be renamed and moved. However,
5498 there are a couple of unusual error situations where the daemon does write
5499 log entries, and I had neglected to close the log afterwards.
5501 30. The text of an SMTP error response that was received during a remote
5502 delivery was being truncated at 512 bytes. This is too short for some of
5503 the long messages that one sometimes sees. I've increased the limit to
5506 31. It is now possible to make retry rules that apply only when a message has a
5507 specific sender, in particular, an empty sender.
5509 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5510 it possible to be selective about when SMTP synchronization is enforced.
5512 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5514 32. Implemented hosts_connection_nolog.
5516 33. Added an ACL for QUIT.
5518 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5521 35. Added mailbox_size and mailbox_filecount to appendfile.
5523 36. Added control = no_multiline_responses to ACLs.
5525 37. There was a bug in the logic of the code that waits for the clock to tick
5526 in the case where the clock went backwards by a substantial amount such
5527 that the microsecond fraction of "now" was more than the microsecond
5528 fraction of "then" (but the whole seconds number was less).
5530 38. Added support for the libradius Radius client library this is found on
5531 FreeBSD (previously only the radiusclient library was supported).
5537 1. When certain lookups returned multiple values in the form name=value, the
5538 quoting of the values was not always being done properly. Specifically:
5539 (a) If the value started with a double quote, but contained no whitespace,
5541 (b) If the value contained whitespace other than a space character (i.e.
5542 tabs or newlines or carriage returns) it was not quoted.
5543 This fix has been applied to the mysql and pgsql lookups by writing a
5544 separate quoting function and calling it from the lookup code. The fix
5545 should probably also be applied to nisplus, ibase and oracle lookups, but
5546 since I cannot test any of those, I have not disturbed their existing code.
5548 2. A hit in the callout cache for a specific address caused a log line with no
5549 reason for rejecting RCPT. Now it says "Previous (cached) callout
5550 verification failure".
5552 3. There was an off-by-one bug in the queryprogram router. An over-long
5553 return line was truncated at 256 instead of 255 characters, thereby
5554 overflowing its buffer with the terminating zero. As well as fixing this, I
5555 have increased the buffer size to 1024 (and made a note to document this).
5557 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5558 when Exim is waiting for an SMTP response from a remote server, Exim
5559 restarts its select() call on the socket, thereby resetting its timeout.
5560 This is not a problem when such interrupts are rare. Somebody set up a cron
5561 job to run exiwhat every 2 minutes, which is less than the normal select()
5562 timeout (5 or 10 minutes). This meant that the select() timeout never
5563 kicked in because it was always reset. I have fixed this by comparing the
5564 time when an interrupt arrives with the time at the start of the first call
5565 to select(). If more time than the timeout has elapsed, the interrupt is
5566 treated as a timeout.
5568 5. Some internal re-factoring in preparation for the addition of Sieve
5569 extensions (by MH). In particular, the "personal" test is moved to a
5570 separate function, and given an option for scanning Cc: and Bcc: (which is
5571 not set for Exim filters).
5573 6. When Exim created an email address using the login of the caller as the
5574 local part (e.g. when creating a From: or Sender: header line), it was not
5575 quoting the local part when it contained special characters such as @.
5577 7. Installed new OpenBSD configuration files.
5579 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5580 try to make them clearer.
5582 9. Callout options, other than the timeout value, were being ignored when
5583 verifying sender addresses in header lines. For example, when using
5585 verify = header_sender/callout=no_cache
5587 the cache was (incorrectly) being used.
5589 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5590 only the Cygwin environment.
5592 11. When return_path_on_delivery was set as a log selector, if different remote
5593 addresses in the same message used different return paths and parallel
5594 remote delivery occurred, the wrong values would sometimes be logged.
5595 (Whenever a remote delivery process finished, the return path value from
5596 the most recently started remote delivery process was logged.)
5598 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5599 lines when AUTH and/or TLS are in use. This is the "received protocol"
5600 field. Exim used to use "asmtp" for authenticated SMTP, without any
5601 indication (in the protocol name) for TLS use. Now it follows the RFC and
5602 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5603 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5604 names appear in log lines as well as in Received: header lines.
5606 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5607 extensions, and comparison tests, and to fix some bugs.
5609 14. Changes to the "personal" filter test:
5611 (1) The test was buggy in that it was just doing the equivalent of
5612 "contains" tests on header lines. For example, if a user's address was
5613 anne@some.where, the "personal" test would incorrectly be true for
5615 To: susanne@some.where
5617 This test is now done by extracting each address from the header in turn,
5618 and checking the entire address. Other tests that are part of "personal"
5619 are now done using regular expressions (for example, to check local parts
5620 of addresses in From: header lines).
5622 (2) The list of non-personal local parts in From: addresses has been
5623 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5624 taken from the Sieve specification recommendations.
5626 (3) If the message contains any header line starting with "List-" it is
5627 treated as non-personal.
5629 (4) The test for "circular" in the Subject: header line has been removed
5630 because it now seems ill-conceived.
5632 15. Minor typos in src/EDITME comments corrected.
5634 16. Installed latest exipick from John Jetmore.
5636 17. If headers_add on a router specified a text string that was too long for
5637 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5638 of string_sprintf() is now avoided.
5640 18. $message_body_size was not set (it was always zero) when running the DATA
5641 ACL and the local_scan() function.
5643 19. For the "mail" command in an Exim filter, no default was being set for
5644 the once_repeat time, causing a random time value to be used if "once" was
5645 specified. (If the value happened to be <= 0, no repeat happened.) The
5646 default is now 0s, meaning "never repeat". The "vacation" command was OK
5647 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5648 (I found it when inspecting the code).
5650 20. There is now an overall timeout for performing a callout verification. It
5651 defaults to 4 times the callout timeout, which applies to individual SMTP
5652 commands during the callout. The overall timeout applies when there is more
5653 than one host that can be tried. The timeout is checked before trying the
5654 next host. This prevents very long delays if there are a large number of
5655 hosts and all are timing out (e.g. when the network connections are timing
5656 out). The value of the overall timeout can be changed by specifying an
5657 additional sub-option for "callout", called "maxwait". For example:
5659 verify = sender/callout=5s,maxwait=20s
5661 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5662 to the end before writing, but this should make it even safer).
5664 22. Exim was forgetting that it had advertised PIPELINING for the second and
5665 subsequent messages on an SMTP connection. It was also not resetting its
5666 memory on STARTTLS and an internal HELO.
5668 23. When Exim logs an SMTP synchronization error within a session, it now
5669 records whether PIPELINING has been advertised or not.
5671 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5672 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5673 rather than long int.
5675 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5677 26. Added the never_mail option to autoreply.
5683 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5684 crash if the getsockname() call failed; this can happen if a connection is
5685 closed very soon after it is established. The problem was simply in the
5686 order in which certain operations were done, causing Exim to try to write
5687 to the SMTP stream before it had set up the file descriptor. The bug has
5688 been fixed by making things happen in the correct order.
5694 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5695 before the connection was closed, thus losing the rejection response.
5697 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5698 some early Solaris releases, but causes trouble in current releases where
5699 socklen_t is defined.
5701 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5704 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5707 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5708 that releasing the top of it at the end releases what was used for sub-
5709 expansions (unless the block got too big). However, discard this block if
5710 the first thing is a variable or header, so that we can use its block when
5711 it is dynamic (useful for very large $message_headers, for example).
5713 6. Lookups now cache *every* query, not just the most recent. A new, separate
5714 store pool is used for this. It can be recovered when all lookup caches are
5715 flushed. Lookups now release memory at the end of their result strings.
5716 This has involved some general refactoring of the lookup sources.
5718 7. Some code has been added to the store_xxx() functions to reduce the amount
5719 of flapping under certain conditions.
5721 8. log_incoming_interface used to affect only the <= reception log lines. Now
5722 it causes the local interface and port to be added to several more SMTP log
5723 lines, for example "SMTP connection from", and rejection lines.
5725 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5727 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5729 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5730 could be overwritten at the end of the current message (or the start of a
5731 new message if it was set in a HELO ACL). The value is now preserved for
5732 the duration of the SMTP connection.
5734 12. If a transport had a headers_rewrite setting, and a matching header line
5735 contained an unqualified address, that address was qualified, even if it
5736 did not match any rewriting rules. The underlying bug was that the values
5737 of the flags that permit the existence of unqualified sender and recipient
5738 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5739 non-local messages, and by -bnq for local messages) were not being
5740 preserved with the message after it was received.
5742 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5743 "next input=" as part of the text comprising the host identity instead of
5744 the correct text. The code was using the same buffer for two different
5745 strings. However, depending on which order the printing function evaluated
5746 its arguments, the bug did not always show up. Under Linux, for example, my
5747 test suite worked just fine.
5749 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5750 doesn't work with some older versions of Perl. It has been changed to "my",
5751 which in any case is probably the better facility to use.
5753 15. A really picky compiler found some instances of statements for creating
5754 error messages that either had too many or two few arguments for the format
5757 16. The size of the buffer for calls to the DNS resolver has been increased
5758 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5759 for addresses that have a lot of PTR records. This alleviates a problem; it
5760 does not fully solve it.
5762 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5763 buffer now truncates the list and logs the incident, which is the same
5764 action as happens when Exim is looking up a host name and its aliases.
5765 Previously in this situation something unpredictable would happen;
5766 sometimes it was "internal error: store_reset failed".
5768 18. If a server dropped the connection unexpectedly when an Exim client was
5769 using GnuTLS and trying to read a response, the client delivery process
5770 crashed while trying to generate an error log message.
5772 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5773 string, for example:
5775 warn message = H1: something\nH2: something
5777 the text was added as a single header line from Exim's point of view
5778 though it ended up OK in the delivered message. However, searching for the
5779 second and subsequent header lines using $h_h2: did not work. This has been
5780 fixed. Similarly, if a system filter added multiple headers in this way,
5781 the routers could not see them.
5783 20. Expanded the error message when iplsearch is called with an invalid key to
5784 suggest using net-iplsearch in a host list.
5786 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5787 ACLs are no longer actually imposed (and a message to that effect is
5790 22. If a "gecos" field in a passwd entry contained escaped characters, in
5791 particular, if it contained a \" sequence, Exim got it wrong when building
5792 a From: or a Sender: header from that name. A second bug also caused
5793 incorrect handling when an unquoted " was present following a character
5794 that needed quoting.
5796 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5797 was not being matched caselessly.
5799 24. Arranged for all hyphens in the exim.8 source to be escaped with
5802 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5803 properly. Recipient callout cache records were still being keyed to include
5804 the sender, even when use_sender was set false. This led to far more
5805 callouts that were necessary. The sender is no longer included in the key
5806 when use_sender is false.
5808 26. Added "control = submission" modifier to ACLs.
5810 27. Added the ${base62d: operator to decode base 62 numbers.
5812 28. dnsdb lookups can now access SRV records.
5814 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5815 the configuration file.
5817 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5818 (-v) mode. This makes the output for a verbose queue run more intelligible.
5820 31. Added a use_postmaster feature to recipient callouts.
5822 32. Added the $body_zerocount variable, containing the number of binary zero
5823 bytes in the message body.
5825 33. The time of last modification of the "new" subdirectory is now used as the
5826 "mailbox time last read" when there is a quota error for a maildir
5829 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5831 35. Added +ignore_unknown as a special item in host lists.
5833 36. Code for decoding IPv6 addresses in host lists is now included, even if
5834 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5835 address was recognized as an IP address, but was then not correctly decoded
5836 into binary, causing unexpected and incorrect effects when compared with
5843 1. Very minor rewording of debugging text in manualroute to say "list of
5844 hosts" instead of "hostlist".
5846 2. If verify=header_syntax was set, and a header line with an unqualified
5847 address (no domain) and a large number of spaces between the end of the
5848 name and the colon was received, the reception process suffered a buffer
5849 overflow, and (when I tested it) crashed. This was caused by some obsolete
5850 code that should have been removed. The fix is to remove it!
5852 3. When running in the test harness, delay a bit after writing a bounce
5853 message to get a bit more predictability in the log output.
5855 4. Added a call to search_tidyup() just before forking a reception process. In
5856 theory, someone could use a lookup in the expansion of smtp_accept_max_
5857 per_host which, without the tidyup, could leave open a database connection.
5859 5. Added the variables $recipient_data and $sender_data which get set from a
5860 lookup success in an ACL "recipients" or "senders" condition, or a router
5861 "senders" option, similar to $domain_data and $local_part_data.
5863 6. Moved the writing of debug_print from before to after the "senders" test
5866 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5867 problems for message scanning, either using a data ACL, or using
5868 local_scan() because the Received: header was not generated till after they
5869 were called (in order to set the time as the time of reception completion).
5870 I have revised the way this works. The header is now generated after the
5871 body is received, but before the ACL or local_scan() are called. After they
5872 are run, the timestamp in the header is updated.
5878 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5879 before starting a queue runner without re-exec. This happened only when
5880 deliver_drop_privilege was set or when the Exim user was set to root. The
5881 effect of the bug was that timeouts during subsequent deliveries caused
5882 crashes instead of being properly handled. The handler is now left at its
5883 default (and expected) setting.
5885 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5886 message, again when deliver_drop_privilege is set or Exim is run as root.
5887 The bug described in (1) was not present in this case, but the tidying up
5888 of the other signals was missing. I have made the two cases consistent.
5890 3. The ignore_target_hosts setting on a manualroute router was being ignored
5891 for hosts that were looked up using the /MX notation.
5893 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5896 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5897 operated on the sender address. After changing the $sender_address to <>
5898 for the sender address verify, Exim was re-instated it as the original
5899 (before rewriting) address, but remembering that it had rewritten it, so it
5900 wasn't rewriting it again. This bug also had the effect of breaking the
5901 sender address verification caching when the sender address was rewritten.
5903 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5904 This has been changed so that if the ip literal address matches
5905 ignore_target_hosts, the router declines.
5907 7. Added expansion conditions match_domain, match_address, and match_local_
5908 part (NOT match_host).
5910 8. The placeholder for the Received: header didn't have a length field set.
5912 9. Added code to Exim itself and to exim_lock to test for a specific race
5913 condition that could lead to file corruption when using MBX delivery. The
5914 issue is with the lockfile that is created in /tmp. If this file is removed
5915 after a process has opened it but before that process has acquired a lock,
5916 there is the potential for a second process to recreate the file and also
5917 acquire a lock. This could lead to two Exim processes writing to the file
5918 at the same time. The added code performs the same test as UW imapd; it
5919 checks after acquiring the lock that its file descriptor still refers to
5920 the same named file.
5922 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5923 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5926 11. Added the smtp_active_hostname option. If used, this will typically be made
5927 to depend on the incoming interface address. Because $interface_address is
5928 not set up until the daemon has forked a reception process, error responses
5929 that can happen earlier (such as "too many connections") no longer contain
5932 12. If an expansion in a condition on a "warn" statement fails because a lookup
5933 defers, the "warn" statement is abandoned, and the next ACL statement is
5934 processed. Previously this caused the whole ACL to be aborted.
5936 13. Added the iplsearch lookup type.
5938 14. Added ident_timeout as a log selector.
5940 15. Added tls_certificate_verified as a log selector.
5942 16. Added a global option tls_require_ciphers (compare the smtp transport
5943 option of the same name). This controls incoming TLS connections.
5945 17. I finally figured out how to make tls_require_ciphers do a similar thing
5946 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5947 before starting the TLS session.
5949 18. Tabs are now shown as \t in -bP output.
5951 19. If the log selector return_path_on_delivery was set, Exim crashed when
5952 bouncing a message because it had too many Received: header lines.
5954 20. If two routers both had headers_remove settings, and the first one included
5955 a superfluous trailing colon, the final name in the first list and the
5956 first name in the second list were incorrectly joined into one item (with a
5957 colon in the middle).
5963 1. Added -C and -D options to the exinext utility, mainly to make it easier
5964 to include in the automated testing, but these could be helpful when
5965 multiple configurations are in use.
5967 2. The exinext utility was not formatting the output nicely when there was
5968 an alternate port involved in the retry record key, nor when there was a
5969 message id as well (for retries that were specific to a specific message
5970 and a specific host). It was also confused by IPv6 addresses, because of
5971 the additional colons they contain. I have fixed the IPv4 problem, and
5972 patched it up to do a reasonable job for IPv6.
5974 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5975 delivery, the log line now contains "pipelined" if PIPELINING was used.
5977 4. An SMTP transport process used to panic and die if the bind() call to set
5978 an explicit outgoing interface failed. This has been changed; it is now
5979 treated in the same way as a connect() failure.
5981 5. A reference to $sender_host_name in the part of a conditional expansion
5982 that was being skipped was still causing a DNS lookup. This no longer
5985 6. The def: expansion condition was not recognizing references to header lines
5986 that used bh_ and bheader_.
5988 7. Added the _cache feature to named lists.
5990 8. The code for checking quota_filecount in the appendfile transport was
5991 allowing one more file than it should have been.
5993 9. For compatibility with Sendmail, the command line option
6001 and sets the incoming protocol and host name (for trusted callers). The
6002 host name and its colon can be omitted when only the protocol is to be set.
6003 Note the Exim already has two private options, -pd and -ps, that refer to
6004 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6005 "s", but I don't think that's a major issue.
6007 10. A number of refactoring changes to the code, none of which should affect
6010 (a) The number of logging options was getting close to filling up the
6011 32-bit word that was used as a bit map. I have split them into two classes:
6012 those that are passed in the argument to log_write(), and those that are
6013 only ever tested independently outside of that function. These are now in
6014 separate 32-bit words, so there is plenty of room for expansion again.
6015 There is no change in the user interface or the logging behaviour.
6017 (b) When building, for example, log lines, the code previously used a
6018 macro that called string_cat() twice, in order to add two strings. This is
6019 not really sufficiently general. Furthermore, there was one instance where
6020 it was actually wrong because one of the argument was used twice, and in
6021 one call a function was used. (As it happened, calling the function twice
6022 did not affect the overall behaviour.) The macro has been replaced by a
6023 function that can join an arbitrary number of extra strings onto a growing
6026 (c) The code for expansion conditions now uses a table and a binary chop
6027 instead of a serial search (which was left over from when there were very
6028 few conditions). Also, it now recognizes conditions like "pam" even when
6029 the relevant support is not compiled in: a suitably worded error message is
6030 given if an attempt is made to use such a condition.
6032 11. Added ${time_interval:xxxxx}.
6034 12. A bug was causing one of the ddress fields not to be passed back correctly
6035 from remote delivery subprocesses. The field in question was not being
6036 subsequently used, so this caused to problems in practice.
6038 13. Added new log selectors queue_time and deliver_time.
6040 14. Might have fixed a bug in maildirsizefile handling that threw up
6041 "unexpected character" debug warnings, and recalculated the data
6042 unnecessarily. In any case, I expanded the warning message to give more
6045 15. Added the message "Restricted characters in address" to the statements in
6046 the default ACL that block characters like @ and % in local parts.
6048 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6049 Three changes have been made:
6051 (a) There was a serious bug; a negative response to MAIL caused the whole
6052 recipient domain to be cached as invalid, thereby blocking all messages
6053 to all local parts at the same domain, from all senders. This bug has
6054 been fixed. The domain is no longer cached after a negative response to
6055 MAIL if the sender used is not empty.
6057 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6060 (c) A new callout option, "use_sender" has been added for people who want
6061 the modified behaviour.
6067 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6070 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6071 indeed breaks things for older releases.
6073 3. Added additional logging to the case where there is a problem reading data
6074 from a filter that is running in a subprocess using a pipe, in order to
6075 try to track down a specific problem.
6077 4. Testing facility fudge: when running in the test harness and attempting
6078 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6079 getting "No route to host". Convert this to a timeout.
6081 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6084 6. Some OS don't have socklen_t but use size_t instead. This affects the
6085 fifth argument of getsockopt() amongst other things. This is now
6086 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6087 can be set for individual OS. I have set it for SunOS5, OSF1, and
6088 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6089 some earlier ones do not.
6091 7. Change 4.30/15 was not doing the test caselessly.
6093 8. The standard form for an IPv6 address literal was being rejected by address
6094 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6095 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6096 this, as well as the form without the "IPv6" on the front (but only when
6097 address literals are enabled, of course).
6099 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6101 10. Exim crashed if a message with an empty sender address specified by -f
6102 encountered a router with an errors_to setting. This could be provoked only
6103 by a command such as
6107 where an empty string was supplied; "<>" did not hit this bug.
6109 11. Installed PCRE release 4.5.
6111 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6112 remained set. It is now erased.
6114 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6115 times from message ids (which are base 36 rather than the normal 62).
6117 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6118 were being counted as actual protocol errors, and logged if the log
6119 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6120 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6121 and DATA following a set of rejected RCPTs do not count as protocol errors.
6122 In other words, Exim assumes they were pipelined, though this may not
6123 actually be the case. Of course, in all cases the client gets an
6124 appropriate error code.
6126 15. If a lookup fails in an ACL condition, a message about the failure may
6127 be available; it is used if testing the ACL cannot continue, because most
6128 such messages specify what the cause of the deferral is. However, some
6129 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6130 that caused an old message to be retained and used if a later statement
6131 caused a defer, replacing the real cause of the deferral.
6133 16. If an IP address had so many PTR records that the DNS lookup buffer
6134 was not large enough to hold them, Exim could crash while trying to process
6135 the truncated data. It now detects and logs this case.
6137 17. Further to 4.21/58, another change has been made: if (and only if) the
6138 first line of a message (the first header line) ends with CRLF, a bare LF
6139 in a subsequent header line has a space inserted after it, so as not to
6140 terminate the header.
6142 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6143 unnecessarily, used atoi() instead of strtol(), and didn't check the
6144 termination when getting file sizes from file names by regex.
6146 19. Completely re-implemented the support for maildirsize files, in the light
6147 of a number of problems with the previous contributed implementation
6148 (4.30/29). In particular:
6150 . If the quota is zero, the maildirsize file is maintained, but no quota is
6153 . If the maildir directory does not exist, it is created before any attempt
6154 to write a maildirsize file.
6156 . The quota value in the file is just a cache; if the quota is changed in
6157 the transport, the new value overrides.
6159 . A regular expression is available for excluding directories from the
6162 20. The autoreply transport checks the characters in options that define the
6163 message's headers; it allows continued headers, but it was checking with
6164 isspace() after an embedded newline instead of explicitly looking for a
6167 21. If all the "regular" hosts to which an address was routed had passed their
6168 expiry times, and had not reached their retry times, the address was
6169 bounced, even if fallback hosts were defined. Now Exim should go on to try
6172 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6173 equivalent code in the SMTP transport. Some hosts send humungous responses
6174 to HELO/EHLO, more than 1024 it seems.
6176 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6177 gives compiler warnings in some environments. I've now done it "properly",
6180 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6181 (because of problems with the built-in one) was declared to return uschar *
6182 instead of char *, causing compiler failure.
6184 25. Fixed a file descriptor leak when processing alias/forward files.
6186 26. Fixed a minor format string issue in dbfn.c.
6188 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6190 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6191 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6194 29. When a sender address is verified, it is cached, to save repeating the test
6195 when there is more than one recipient in a message. However, when the
6196 verification involves a callout, it is possible for different callout
6197 options to be set for different recipients. It is too complicated to keep
6198 track of this in the cache, so now Exim always runs a verification when a
6199 callout is required, relying on the callout cache for the optimization.
6200 The overhead is duplication of the address routing, but this should not be
6203 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6204 to be verified with callout=postmaster, and the main callout worked but the
6205 postmaster check failed, the verification correctly failed. However, if a
6206 subsequent RCPT command asked for sender verification *without* the
6207 postmaster check, incorrect caching caused this verification also to fail,
6210 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6211 it was not caching the DNS options (qualify_single, search_parents) that
6212 were used when the lookup failed. A subsequent lookup with different
6213 options therefore always gave the same answer, though there were cases
6214 where it should not have. (Example: a "domains = !$mx_any" option on a
6215 dnslookup router: the "domains" option is always processed without any
6216 widening, but the router might have qualify_single set.) Now Exim uses the
6217 cached value only when the same options are set.
6219 32. Added John Jetmore's "exipick" utility to the distribution.
6221 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6222 than a timeout (e.g. a certificate is required, and is not provided), an
6223 Exim server now closes the connection immediately. Previously it waited for
6224 the client to close - but if the client is SSL, it seems that they each
6225 wait for each other, leading to a delay before one of them times out.
6227 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6228 maintained 0.8.x compatibility because I don't think many are using it, and
6229 it is clearly obsolete.
6231 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6234 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6235 client certificate was expired. A simple patch fixes this, though I don't
6236 understand the full logic of why the verify callback is called multiple
6239 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6240 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6241 which causes problems with some clients (such as the Certicom SSL Plus
6242 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6243 disables the coutermeasure allowing Eudora to connect."
6245 38. Exim was not checking that a write() to a log file succeeded. This could
6246 lead to Bad Things if a log got too big, in particular if it hit a file
6247 size limit. Exim now panics and dies if it cannot write to a log file, just
6248 as it does if it cannot open a log file.
6250 39. Modified OS/Makefile-Linux so that it now contains
6252 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6254 The two -D definitions ensure that Exim is compiled with large file
6255 support, which makes it possible to handle log files that are bigger than
6258 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6259 instance) a domain was checked against a named list that involved a lookup,
6260 causing $domain_data to be set, then another domain was checked against the
6261 same list, then the first domain was re-checked, the value of $domain_data
6262 after the final check could be wrong. In particular, if the second check
6263 failed, it could be set empty. This bug probably also applied to
6266 41. The strip_trailing_dot option was not being applied to the address given
6267 with the -f command-line option.
6269 42. The code for reading a message's header from the spool was incrementing
6270 $received_count, but never initializing it. This meant that the value was
6271 incorrect (doubled) while delivering a message in the same process in which
6272 it was received. In the most common configuration of Exim, this never
6273 happens - a fresh exec is done - but it can happen when
6274 deliver_drop_privilege is set.
6276 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6277 it now includes up to 150 characters of the unexpected data in the log
6280 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6281 and building data strings. The size of both of these buffers was 10 000
6282 bytes - far larger than anybody would *ever* want, thought I. Needless to
6283 say, somebody hit the limit. I have increased the maximum line length to
6284 20 000 and the maximum data length of concatenated lines to 100 000. I have
6285 also fixed two bugs, because there was no checking on these buffers. Tsk,
6286 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6287 buffer is too small.
6289 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6290 lsearch lookups. Now it does.
6292 46. When parsing a route_list item in a manualroute router, a fixed-length
6293 buffer was used for the list of hosts. I made this 1024 bytes long,
6294 thinking that nobody would ever have a list of hosts that long. Wrong.
6295 Somebody had a whole pile of complicated expansion conditions, and the
6296 string was silently truncated, leading to an expansion error. It turns out
6297 that it is easier to change to an unlimited length (owing to other changes
6298 that have happened since this code was originally written) than to build
6299 structure for giving a limitation error. The length of the item that
6300 expands into the list of hosts is now unlimited.
6302 47. The lsearch lookup could not handle data where the length of text line was
6303 more than 4095 characters. Such lines were truncated, leading to shortened
6304 data being returned. It should now handle lines of any length.
6306 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6307 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6310 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6311 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6312 no longer happens in comment lines. A list of replacements is now placed
6313 at the head of all of the source files, except those whose only change is
6314 to replace PERL_COMMAND in the very first #! line.
6316 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6317 messages on the queue, with a bottom-up merge sort, using code contributed
6318 by Michael Haardt. This should make operations like -bp somewhat faster on
6319 large queues. It won't affect queue runners, except when queue_run_in_order
6322 51. Installed eximstats 1.31 in the distribution.
6324 52. Added support for SRV lookups to the dnslookup router.
6326 53. If an ACL referred to $message_body or $message_body_end, the value was not
6327 reset for any messages that followed in the same SMTP session.
6329 54. The store-handling optimization for building very long strings was not
6330 differentiating between the different store pools. I don't think this
6331 actually made any difference in practice, but I've tidied it.
6333 55. While running the routers to verify a sender address, $sender_address
6334 was still set to the sender address. This is wrong, because when routing to
6335 send a bounce to the sender, it would be empty. Therefore, I have changed
6336 it so that, while verifying a sender address, $sender_address is set to <>.
6337 (There is no change to what happens when verifying a recipient address.)
6339 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6340 target A or AAAA records (if not already returned) without resetting the
6341 qualify_single or search_parents options of the DNS resolver. These are
6342 inappropriate in this case because the targets of MX and SRV records must
6343 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6344 target that, when qualified, matched something in the local domain. These
6345 two options are now turned off when doing these lookups.
6347 57. It seems that at least some releases of Reiserfs (which does not have the
6348 concept of a fixed number of inodes) returns zero and not -1 for the
6349 number of available inodes. This interacted badly with check_spool_inodes,
6350 which assumed that -1 was the "no such thing" setting. What I have done is
6351 to check that the total number of inodes is greater than zero before doing
6352 the test of how many are available.
6354 58. When a "warn" ACL statement has a log_message modifier, the message is
6355 remembered, and not repeated. This is to avoid a lot of repetition when a
6356 message has many recipients that cause the same warning to be written.
6357 However, Exim was preserving the list of already written lines for an
6358 entire SMTP session, which doesn't seem right. The memory is now reset if a
6359 new message is started.
6361 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6362 debugging output unless log_rewrite was also set.
6364 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6365 of (int)(handle) when we know that handle contains (void *)(-1).
6367 61. The Exim daemon panic-logs an error return when it closes the incoming
6368 connection. However "connection reset by peer" seems to be common, and
6369 isn't really an error worthy of noting specially, so that particular error
6372 62. When Exim is trying to find all the local interfaces, it used to panic and
6373 die if the ioctl to get the interface flags failed. However, it seems that
6374 on at least one OS (Solaris 9) it is possible to have an interface that is
6375 included in the list of interfaces, but for which you get a failure error
6376 for this call. This happens when the interface is not "plumbed" into a
6377 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6378 failure of the "get flags" call assumes that the interface is down.
6380 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6381 makes life easier for people who are doing arithmetic on fields extracted
6382 from dates, where you often get leading zeros that should not be
6383 interpreted as octal.
6385 64. Added qualify_domain to the redirect router, to override the global
6388 65. If a pathologically long header line contained very many addresses (the
6389 report of this problem mentioned 10 000) and each of them was rewritten,
6390 Exim could use up a very large amount of memory. (It kept on making new
6391 copies of the header line as it rewrote, and never released the old ones.)
6392 At the expense of a bit more processing, the header rewriting function has
6393 been changed so that it no longer eats memory in this way.
6395 66. The generation of the Received: header has been moved from the time that a
6396 message starts to be received, to the time that it finishes. The timestamp
6397 in the Received: header should now be very close to that of the <= log
6398 line. There are two side-effects of this change:
6400 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6401 logged header lines no longer include the local Received: line, because
6402 it has not yet been created. The same applies to a copy of the message
6403 that is returned to a non-SMTP sender when a message is rejected.
6405 (b) When a filter file is tested using -bf, no additional Received: header
6406 is added to the test message. After some thought, I decided that this
6409 This change does not affect the value of $received_for. It is still set
6410 after address rewriting, but before local_scan() is called.
6412 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6414 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6415 gave an unhelpful panic error message, and a defer error. I have managed to
6416 change this behaviour so that it now rejects any supplied certificate,
6417 which seems right, as the list of acceptable certificates is empty.
6419 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6420 gave an unhelpful defer error. I have not managed to make this reject any
6421 supplied certificates, but the error message it gives is "no certificate
6422 supplied", which is not helpful.
6424 70. exigrep's output now also includes lines that are not associated with any
6425 message, but which match the given pattern. Implemented by a patch from
6426 Martin Sluka, which also tidied up the Perl a bit.
6428 71. Recipient callout verification, like sender verification, was using <> in
6429 the MAIL FROM command. This isn't really the right thing, since the actual
6430 sender may affect whether the remote host accepts the recipient or not. I
6431 have changed it to use the actual sender in the callout; this means that
6432 the cache record is now keyed on a recipient/sender pair, not just the
6433 recipient address. There doesn't seem to be a real danger of callout loops,
6434 since a callout by the remote host to check the sender would use <>.
6435 [SEE ABOVE: changed after hitting problems.]
6437 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6438 temporary errors. However, in the case of such a code being given after
6439 the end of a data transmission (i.e. after ".") Exim was failing to write
6440 a retry record for the message. (Yes, there was some broken host that was
6441 actually sending 8xx at this point.)
6443 73. An unknown lookup type in a host list could cause Exim to panic-die when
6444 the list was checked. (An example that provoked this was putting <; in the
6445 middle of a list instead of at the start.) If this happened during a DATA
6446 ACL check, a -D file could be left lying around. This kind of configuration
6447 error no longer causes Exim to die; instead it causes a defer error. The
6448 incident is still logged to the main and panic logs.
6450 74. Buglet left over from Exim 3 conversion. The message "too many messages
6451 in one connection" was written to the rejectlog but not the mainlog, except
6452 when address rewriting (yes!) was being logged.
6454 75. Added write_rejectlog option.
6456 76. When a system filter was run not as root (that is, when system_filter_user
6457 was set), the values of the $n variables were not being returned to the
6458 main process; thus, they were not subsequently available in the $sn
6461 77. Added +return_path_on_delivery log selector.
6463 78. A connection timeout was being treated differently from recipients deferred
6464 when testing hosts_max_try with a message that was older than the host's
6465 retry timeout. (The host should not be counted, thus allowing all hosts to
6466 be tried at least once before bouncing.) This may have been the cause of an
6467 occasionally reported bug whereby a message would remain on the queue
6468 longer than the retry timeout, but would be bounced if a delivery was
6469 forced. I say "may" because I never totally pinned down the problem;
6470 setting up timeout/retry tests is difficult. See also the next item.
6472 79. The ultimate address timeout was not being applied to errors that involved
6473 a combination of host plus message (for example, a timeout on a MAIL
6474 command). When an address resolved to a number of possible hosts, and they
6475 were not all tried for each delivery (e.g. because of hosts_max_try), a
6476 message could remain on the queue longer than the retry timeout.
6478 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6481 81. Fixed an obscure SMTP outgoing bug which required at least the following
6482 conditions: (a) there was another message waiting for the same server;
6483 (b) the server returned 5xx to all RCPT commands in the first message so
6484 that the message was not completed; (c) the server dropped the connection
6485 or gave a negative response to the RSET that Exim sends to abort the
6486 transaction. The observed case was a dropped connection after DATA that had
6487 been sent in pipelining mode. That is, the server had advertised PIPELINING
6488 but was not implementing it correctly. The effect of the bug was incorrect
6489 behaviour, such as trying another host, and this could lead to a crash.
6495 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6496 and daemon.c were passed as pointers to ints; they should have been
6497 pointers to socklen_t variables (which are typically unsigned ints).
6499 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6502 3. Fixed a really odd bug that affected only the testing scheme; patching a
6503 certain fixed string in the binary changed the value of another string that
6504 happened to be identical to the end of the original first string.
6506 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6507 name", it returns that address as the IP address. On some operating
6508 systems (e.g. Solaris), it also passes back the IP address string as the
6509 "host name". However, on others (e.g. Linux), it passes back an empty
6510 string. Exim wasn't checking for this, and was changing the host name to an
6511 empty string, assuming it had been canonicalized.
6513 5. Although rare, it is permitted to have more than one PTR record for a given
6514 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6515 all the names associated with an address, because they do in Solaris.
6516 However, it seems that they do not in Linux for data that comes from the
6517 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6518 I found this out when I moved to a new Linux workstation and tried to run
6519 the Exim test suite.
6521 To get round this problem I have changed the code so that it now does its
6522 own call to the DNS to look up PTR records when searching for a host name.
6523 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6524 addresses that are only in /etc/hosts are still found.
6526 This behaviour is, however, controlled by an option called host_lookup_
6527 order, which defaults to "bydns:byaddr". If people want to use the other
6528 order, or indeed, just use one or the other means of lookup, they can
6529 specify it in this variable.
6531 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6532 some operating systems, this comes back from gethostbyaddr() as an empty
6533 string, and this is what Exim used to test for. However, it seems that in
6534 other systems, "." is yielded. Exim now tests for this case too.
6536 7. The values of check_spool_space and check_log_space are now held internally
6537 as a number of kilobytes instead of an absolute number of bytes. If a
6538 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6539 kilobyte. This means that much larger values can be stored.
6541 8. Exim monitor: an attempt to get the action menu when not actually pointing
6542 at a message produces an empty menu entitled "No message selected". This
6543 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6544 no entries in it ("Shell widget menu has zero width and/or height"). So I
6545 have added a single, blank menu entry in this case.
6547 9. Added ${quote_local_part.
6549 10. MIME decoding is now applied to the contents of Subject: header lines when
6552 11. Now that a reference to $sender_host_address automatically causes a reverse
6553 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6554 host lookup before query-style lookups in lists that might use this
6555 variable. This has therefore been abolished, and the "net-" prefix is no
6556 longer necessary for query-style lookups.
6558 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6559 have been a typo for LFLAGS, so it has been changed.
6561 13. The install script calls Exim with "-C /dev/null" in order to find the
6562 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6563 to be output. However, since Exim outputs its version number before the
6564 error, it didn't break the script. It just looked ugly. I fixed this by
6565 always allowing "-C /dev/null" if the caller is root.
6567 14. Ignore overlarge ACL variable number when reading spool file - insurance
6568 against a later release with more variables having written the file.
6570 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6571 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6572 this, as well as the form without the "IPv6" on the front.
6574 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6575 OS/Makefile-Darwin file.
6577 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6578 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6580 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6581 variable. However, some OS use ints for inodes. I've added cast to long int
6582 to get rid of the compiler warning.
6584 19. I had forgotten to lock out "/../" in configuration file names when
6585 ALT_CONFIG_PREFIX was set.
6587 20. Routers used for verification do not need to specify transports. However,
6588 if such a router generated a host list, and callout was configured, Exim
6589 crashed, because it could not find a port number from the (non-existent)
6590 transport. It now assumes port 25 in this circumstance.
6592 21. Added the -t option to exigrep.
6594 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6595 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6596 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6597 them is set, LOOKUP_LSEARCH is forced.
6599 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6601 24. Added sender and host information to the "rejected by local_scan()" log
6602 line; previously there was no indication of these.
6604 25. Added .include_if_exists.
6606 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6607 Linux. It turns out that not all file systems support this. Apparently some
6608 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6609 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6610 not supported on the file descriptor, is now ignored when Exim is trying to
6611 sync a directory. This applies only to Linux.
6613 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6615 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6616 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6619 29. Added support for maildirsize files from supplied patch (modified a bit).
6621 30. The use of :fail: followed by an empty string could lead Exim to respond to
6622 sender verification failures with (e.g.):
6624 550 Verification failed for <xxx>
6625 550 Sender verify failed
6627 where the first response line was missing the '-' that indicates it is not
6628 the final line of the response.
6630 31. The loop for finding the name of the user that called Exim had a hardwired
6631 limit of 10; it now uses the value of finduser_retries, which is used for
6632 all other user lookups.
6634 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6637 33. Exim was neglecting to zero errno before one call of strtol() when
6638 expanding a string and expecting an integer value. On some systems this
6639 resulted in spurious "integer overflow" errors. Also, it was casting the
6640 result into an int without checking.
6642 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6643 did not work. The code looks as if it has *never* worked, though it appears
6644 to have been documented since at least release 1.62. I have made it work.
6646 35. The "timeout_DNS" error in retry rules, also documented since at least
6647 1.62, also never worked. As it isn't clear exactly what this means, and
6648 clearly it isn't a major issue, I have abolished the feature by treating it
6649 as "timeout", and writing a warning to the main and panic logs.
6651 36. The display of retry rules for -brt wasn't always showing the error code
6654 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6655 timeout_connect_A, timeout_connect_MX.
6657 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6658 to the empty sender.
6660 39. The daemon was not analysing the content of -oX till after it had closed
6661 stderr and disconnected from the controlling terminal. This meant that any
6662 syntax errors were only noted on the panic log, and the return code from
6663 the command was 0. By re-arranging the code a little, I've made the
6664 decoding happen first, so such errors now appear on stderr, and the return
6665 code is 1. However, the actual setting up of the sockets still happens in
6666 the disconnected process, so errors there are still only recorded on the
6669 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6670 connections (as happens on some IP stacks) was logged at start up time as
6671 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6672 it from "IPv6 and IPv4", which means that two separate sockets are being
6675 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6676 says whether AF_INET or AF_INET6 was passed as an argument.
6678 42. Exiwhat output was messed up when time zones were included in log
6681 43. Exiwhat now gives more information about the daemon's listening ports,
6682 and whether -tls-on-connect was used.
6684 44. The "port" option of the smtp transport is now expanded.
6686 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6687 silently ignored. Now an error message is written to the main and panic
6690 46. There's a new ACL modifier called "logwrite" which writes to a log file
6691 as soon as it is encountered.
6693 47. Added $local_user_uid and $local_user_gid at routing time.
6695 48. Exim crashed when trying to verify a sender address that was being
6698 49. Exim was recognizing only a space character after ".include". It now also
6699 recognizes a tab character.
6701 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6702 extracting the relevant information from the specification. The man page no
6703 longer contains scrambled data for the -d option, and I've added a section
6704 at the front about calling Exim under different names.
6706 51. Added "extra_headers" argument to the "mail" command in filter files.
6708 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6711 53. Installed eximstats 1.29.
6713 54. Added transport_filter_timeout as a generic transport option.
6715 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6716 Cc: header lines. This was required by RFC 822, but it not required by RFC
6719 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6720 incoming messages that did not have them. Now it does so only if the
6721 message originates locally, that is, if there is no associated remote host
6722 address. When Resent- header lines are present, this applies to the Resent-
6723 lines rather than the non-Resent- lines.
6725 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6726 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6728 58. Messages for configuration errors now include the name of the main
6729 configuration file - useful now that there may be more than one file in a
6730 list (.included file names were always shown).
6732 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6733 for those rare installations that do not start the daemon as root or run it
6734 setuid root. I've cut out the call to initgroups() if the daemon is not
6737 60. The Exim user and group can now be bound into the binary as text strings
6738 that are looked up at the start of Exim's processing.
6740 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6742 62. Added $mailstore_basename variable.
6744 63. Installed patch to sieve.c from Michael Haardt.
6746 64. When Exim failed to open the panic log after failing to open the main log,
6747 the original message it was trying to log was written to stderr and debug
6748 output, but if they were not available (the usual case in production), it
6749 was lost. Now it is written to syslog before the two lines that record the
6750 failures to open the logs.
6752 65. Users' Exim filters run in subprocesses under the user's uid. It is
6753 possible for a "deliver" command or an alias in a "personal" command to
6754 provoke an address rewrite. If logging of address rewriting is configured,
6755 this fails because the process is not running as root or exim. There may be
6756 a better way of dealing with this, but for the moment (because 4.30 needs
6757 to be released), I have disabled address rewrite logging when running a
6758 filter in a non-root, non-exim process.
6764 1. The buildconfig auxiliary program wasn't quoting the value set for
6765 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6766 not defined. This bug was masked in 4.22 by the effect that was fixed in
6769 2. Some messages that were rejected after a message id was allocated were
6770 shown as "incomplete" by exigrep. It no longer does this for messages that
6771 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6773 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6774 have allow_domain_literals set, the ID did not get logged in the <= line.
6775 Domain literals are now always recognized in Message-ID: header lines.
6777 4. The first argument for a ${extract expansion item is the key name or field
6778 number. Leading and trailing spaces in this item were not being ignored,
6779 causing some misleading effects.
6781 5. When deliver_drop_privilege was set, single queue runner processes started
6782 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6783 same command in the process it spins off) were not dropping privilege.
6785 6. When the daemon running as "exim" started a queue runner, it always
6786 re-executed Exim in the spun-off process. This is a waste of effort when
6787 deliver_drop_privilege is set. The new process now just calls the
6788 queue-runner function directly.
6794 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6797 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6798 ignored. Though the use of -oP was forcing the writing of a pid file, it
6799 was always written to the default place.
6801 3. If the message "no IP address found for host xxxx" is generated during
6802 incoming verification, it is now followed by identification of the incoming
6803 connection (so you can more easily find what provoked it).
6805 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6807 5. Added some features to "harden" Exim a bit more against certain attacks:
6809 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6810 be put in Local/Makefile. This is like the never_users runtime option,
6811 but it cannot be overridden. The default setting is "root".
6813 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6814 prefix string with which any file named in a -C command line option
6817 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6818 is retained for -C and -D only if the caller of Exim is root. Without
6819 it, the exim user may also use -C and -D and retain privilege.
6821 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6822 command line option is disabled.
6824 6. Macro names set by the -D option must start with an upper case letter, just
6825 like macro names defined in the configuration file.
6827 7. Added "dereference=" facility to LDAP.
6829 8. Two instances of the typo "uknown" in the source files are fixed.
6831 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6832 the Configure-Makefile script screwed up while processing it.
6834 10. Incorporated PCRE 4.4.
6836 11. The SMTP synchronization check was not operating right at the start of an
6837 SMTP session. For example, it could not catch a HELO sent before the client
6838 waited for the greeting. There is now a check for outstanding input at the
6839 point when the greeting is written. Because of the duplex, asynchronous
6840 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6841 way, but not yet received, when the check is performed.
6843 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6844 on TCP/IP sockets, because this apparently causes some broken clients to
6847 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6848 unchanged) from the Cygwin maintainer.
6850 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6851 was supported instead of testing for mbx. Effectively a typo.
6853 15. The spa authenticator server code was not checking that the input it
6854 received was valid base64.
6856 16. The debug output line for the "set" modifier in ACLs was not showing the
6857 name of the variable that was being set.
6859 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6861 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6862 lookup on its own. Something else was needed to trigger the lookup. For
6863 example, a match in host_lookup or the need for a host name in a host list.
6864 Now, if $sender_host_name is referenced and the host name has not yet been
6865 looked up, a lookup is performed. If the lookup fails, the variable remains
6866 empty, and $host_lookup_failed is set to "1".
6868 19. Added "eqi" as a case-independent comparison operator.
6870 20. The saslauthd authentication condition could segfault if neither service
6871 nor realm was specified.
6873 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6874 error message that was logged was misleading, and incoming SMTP
6875 connections were dropped. The message is now more accurate, and temporary
6876 errors are given to SMTP connections.
6878 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6879 (except RSET) with a 421 error, until QUIT is received. However, it was
6880 failing to send a response to QUIT.
6882 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6883 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6884 ACL is now run after the helo_try_verify_hosts code.
6886 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6887 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6888 case-independent, so other case variants are also recognized). Apparently
6889 some systems use these upper case variants.
6891 25. If more than two messages were waiting for the same host, and a transport
6892 filter was specified for the transport, Exim sent two messages over the
6893 same TCP/IP connection, and then failed with "socket operation on non-
6894 socket" when it tried to send the third.
6896 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6898 27. The extern definition of crypt16() in expand.c was not being excluded when
6899 the OS had its own crypt16() function.
6901 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6902 as a preferred synonym for return_size_limit, both as an option and as an
6905 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6907 30. Changed the default configuration ACL to relax the local part checking rule
6908 for addresses that are not in any local domains. For these addresses,
6909 slashes and pipe symbols are allowed within local parts, but the sequence
6910 /../ is explicitly forbidden.
6912 31. SPA server authentication was not clearing the challenge buffer before
6915 32. log_message in a "warn" ACL statement was writing to the reject log as
6916 well as to the main log, which contradicts the documentation and doesn't
6917 seem right (because no rejection is happening). So I have stopped it.
6919 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6920 However, I am unable to do any testing of this.
6922 34. Fixed an infelicity in the appendfile transport. When checking directories
6923 for a mailbox, to see if any needed to be created, it was accidentally
6924 using path names with one or more superfluous leading slashes; tracing
6925 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6927 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6928 contents are added to the log line that is written for every discarded
6929 recipient. (Previously a log_message setting was ignored.)
6931 36. The ${quote: operator now quotes the string if it is empty.
6933 37. The install script runs exim in order to find its version number. If for
6934 some reason other than non-existence or emptiness, which it checks, it
6935 could not run './exim', it was installing it with an empty version number,
6936 i.e. as "exim-". This error state is now caught, and the installation is
6939 38. An argument was missing from the function that creates an error message
6940 when Exim fails to connect to the socket for saslauthd authentication.
6941 This could cause Exim to crash, or give a corrupted message.
6943 39. Added isip, isip4, and isip6 to ${if conditions.
6945 40. The ACL variables $acl_xx are now saved with the message, and can be
6946 accessed later in routers, transports, and filters.
6948 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6949 strings in the file are not string-expanded.
6951 42. If a MAIL command specified a SIZE value that was too large to fit into an
6952 int variable, the check against message_size_limit failed. Such values are
6953 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6954 day this will have to be increased, but I don't think I want to be around
6955 when emails are that large.
6962 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6963 iconv() is not standard in FreeBSD.
6965 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6966 IPv6 enabled. The observed symptom was a segmentation fault on return from
6967 the function os_common_find_running_interfaces() in src/os.c.
6969 3. In the check_special_case() function in daemon.c I had used "errno" as an
6970 argument name, which causes warnings on some systems. This was basically a
6971 typo, since it was named "eno" in the comments!
6973 4. The code that waits for the clock to tick (at a resolution of some fraction
6974 of a second) so as to ensure message-id uniqueness was always waiting for
6975 at least one whole tick, when it could have waited for less. [This is
6976 almost certainly not relevant at current processor speeds, where it is
6977 unlikely to ever wait at all. But we try to future-proof.]
6979 5. The function that sleeps for a time interval that includes fractions of a
6980 second contained a race. It did not block SIGALRM between setting the
6981 timer, and suspending (a couple of lines later). If the interval was short
6982 and the sigsuspend() was delayed until after it had expired, the suspension
6983 never ended. On busy systems this could lead to processes getting stuck for
6986 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6987 process, before it forks any delivery processes. The open lookup caching
6988 mechanism meant that the open file or database connection was passed into
6989 the delivery process. The problem was that delivery processes always tidy
6990 up cached lookup data. This could cause a problem for the next delivery
6991 process started by the queue runner, because the external queue runner
6992 process does not know about the closure. So the next delivery process
6993 still has data in the lookup cache. In the case of a file lookup, there was
6994 no problem because closing a file descriptor in a subprocess doesn't affect
6995 the parent. However, if the lookup was caching a connection to a database,
6996 the connection was closed, and the second delivery process was likely to
6997 see errors such as "PGSQL: query failed: server closed the connection
6998 unexpectedly". The problem has been fixed by closing all cached lookups
6999 in a queue runner before running a delivery process.
7001 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7002 seem to have the "const" qualifier which it has on other OS. I've
7005 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7006 *of the same type* (client or server) with the same public name that an
7007 error should be diagnosed.
7009 9. When Exim looked up a host name for an IP address, but failed to find the
7010 original IP address when looking up the host name (a safety check), it
7011 output the message "<ip address> does not match any IP for NULL", which was
7012 confusing, to say the least. The bug was that the host name should have
7013 appeared instead of "NULL".
7015 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7016 user that is built into the binary, and the -C or -D options is used, root
7017 privilege is dropped before the configuration file is read. In addition,
7018 logging is switched to stderr instead of the normal log files. If the
7019 configuration then re-defines the Exim user, the unprivileged environment
7020 is probably not what is expected, so Exim logs a panic warning message (but
7023 However, if deliver_drop_privilege is set, the unprivileged state may well
7024 be exactly what is intended, so the warning has been cut out in that case,
7025 and Exim is allowed to try to write to its normal log files.
7031 1. smtp_return_error_details was not giving details for temporary sender
7032 or receiver verification errors.
7034 2. Diagnose a configuration error if two authenticators have the same public
7037 3. Exim used not to create the message log file for a message until the first
7038 delivery attempt. This could be confusing when incoming messages were held
7039 for policy or load reasons. The message log file is now created at the time
7040 the message is received, and an initial "Received" line is written to it.
7042 4. The automatically generated man page for command line options had a minor
7043 bug that caused no ill effects; however, a more serious problem was that
7044 the procedure for building the man page automatically didn't always
7045 operate. Consequently, release 4.20 contains an out-of-date version. This
7046 shouldn't happen again.
7048 5. When building Exim with embedded Perl support, the script that builds the
7049 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7050 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7052 6. The freeze_tell option was not being used for messages that were frozen on
7053 arrival, either by an ACL or by local_scan().
7055 7. Added the smtp_incomplete_transaction log selector.
7057 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7058 was accepting AUTH without a new EHLO.
7060 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7061 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7064 10. Logging of TCP/IP connections (when configured) now happens in the main
7065 daemon process instead of the child process, so that the TCP/IP connection
7066 count is more accurate (but it can never be perfect).
7068 11. The use of "drop" in a nested ACL was not being handled correctly in the
7069 outer ACL. Now, if condition failure induced by the nested "drop" causes
7070 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7071 or "require"), the connection is dropped.
7073 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7074 that yield "discard" can now be used with an "accept" or a "discard" verb,
7075 but an error is generated for any others (because I can't see a useful way
7076 to define what should happen).
7078 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7079 are now processed in the same way as lines in the Exim configuration file.
7080 In particular, continuation lines are supported.
7082 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7084 15. Added -ti meaning -t -i.
7086 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7087 domains, and warn by logging if others are found.
7089 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7090 returned from GIFCONF when Exim is trying to find the list of interfaces on
7091 a host. The code in os.c has been modified to copy each ifreq to an aligned
7092 structure in all cases.
7094 Also, in some cases, the returned ifreq's were being copied to a 'struct
7095 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7096 means the last couple of bytes of an IPv6 address could be chopped if the
7097 ifreq contained only a normal sockaddr (14 bytes storage).
7099 18. Named domain lists were not supported in the hosts_treat_as_local option.
7100 An entry such as +xxxx was not recognized, and was treated as a literal
7103 19. Ensure that header lines added by a DATA ACL are included in the reject log
7104 if the ACL subsequently rejects the message.
7106 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7107 MD5 (which is deprecated).
7109 21. When testing a filter file using -bf, Exim was writing a message when it
7110 took the sender from a "From " line in the message, but it was not doing so
7111 when it took $return_path from a Return-Path: header line. It now does.
7113 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7114 with a valid header line field name (a series of printing characters
7115 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7117 23. Changed "disc" in the source to "disk" to conform to the documentation and
7118 the book and for uniformity.
7120 24. Ignore Sendmail's -Ooption=value command line item.
7122 25. When execve() failed while trying to run a command in a pipe transport,
7123 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7124 could be confused with a return value of 69 from the command itself. This
7125 has been changed to 127, the value the shell returns if it is asked to run
7126 a non-existent command. The wording for the related log line suggests a
7127 non-existent command as the problem.
7129 26. If received_header_text expands to an empty string, do not add a Received:
7130 header line to the message. (Well, it adds a token one on the spool, but
7131 marks it "old" so that it doesn't get used or transmitted.)
7133 27. Installed eximstats 1.28 (addition of -nt option).
7135 28. There was no check for failure on the call to getsockname() in the daemon
7136 code. This can fail if there is a shortage of resources on the system, with
7137 ENOMEM, for example. A temporary error is now given on failure.
7139 29. Contrary to the C standard, it seems that in some environments, the
7140 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7141 program. Exim now does this explicitly; it affects the formatting of
7142 timestamps using strftime().
7144 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7145 complaints. I've now initialized all the variables, to avoid this.
7147 32. Header lines added by a system filter were not being "seen" during
7148 transport-time rewrites.
7150 33. The info_callback() function passed to OpenSSL is set up with type void
7151 (*)(SSL *, int, int), as described somewhere. However, when calling the
7152 function (actually a macro) that sets it up, the type void(*)() is
7153 expected. I've put in a cast to prevent warnings from picky compilers.
7155 34. If a DNS black list lookup found a CNAME record, but there were no A
7156 records associated with the domain it pointed at, Exim crashed.
7158 35. If a DNS black list lookup returned more than one A record, Exim ignored
7159 all but the first. It now scans all returned addresses if a particular IP
7160 value is being sought. In this situation, the contents of the
7161 $dnslist_value variable are a list of all the addresses, separated by a
7164 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7165 to accept a host name and all its aliases if the forward lookup for any of
7166 them yielded the IP address of the incoming connection. Now it accepts only
7167 those names whose forward lookup yields the correct IP address. Any other
7168 names are discarded. This closes a loophole whereby a rogue DNS
7169 administrator could create reverse DNS records to break through a
7170 wildcarded host restriction in an ACL.
7172 37. If a user filter or a system filter that ran in a subprocess used any of
7173 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7174 the wrong values were passed to the pipe command ($thisaddress had the
7175 value of $0, $0 had the value of $1, etc). This bug was introduced by
7176 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7178 38. Improved the line breaking for long SMTP error messages from ACLs.
7179 Previously, if there was no break point between 40 and 75 characters, Exim
7180 left the rest of the message alone. Two changes have been made: (a) I've
7181 reduced the minimum length to 35 characters; (b) if it can't find a break
7182 point between 35 and 75 characters, it looks ahead and uses the first one
7183 that it finds. This may give the occasional overlong line, but at least the
7184 remaining text gets split now.
7186 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7187 file descriptors might be low, and that setting 1000 would always raise it.
7188 It turns out that in some environments, the limit is already over 1000 and
7189 that lowering it causes trouble. So now Exim takes care not to decrease it.
7191 40. When delivering a message, the value of $return_path is set to $sender_
7192 address at the start of routing (routers may change the value). By an
7193 oversight, this default was not being set up when an address was tested by
7194 -bt or -bv, which affected the outcome if any router or filter referred to
7197 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7198 log only when "message" or "log_message" are set. However, if one of the
7199 conditions was an address verification, or a call to a nested ACL, the
7200 messages generated by the underlying test were being passed through. This
7201 no longer happens. The underlying message is available in $acl_verify_
7202 message for both "message" and "log_message" expansions, so it can be
7203 passed through if needed.
7205 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7206 new expansion $bh_ to give the encoded byte string without charset
7207 translation. Translation happens only if iconv() is available; HAVE_ICONV
7208 indicates this at build time. HEADERS_CHARSET gives the charset to
7209 translate to; headers_charset can change it in the configuration, and
7210 "headers charset" can change it in an individual filter file.
7212 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7213 that creates RFC 2047 encoded "words" labels them as that charset instead
7214 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7215 expansion operator; (ii) when Exim creates a From: line for a local
7216 message; (iii) when a header line is rewritten to include a "phrase" part.
7218 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7219 buggy, causing it to skip the first lines of messages whose message ID
7220 ended in 'D'. This would not have bitten before Exim release 4.14, because
7221 message IDs were unlikely to end in 'D' before then. The effect was to have
7222 incorrect size information for certain domains.
7224 45. #include "config.h" was missing at the start of the crypt16.c module. This
7225 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7228 46. If there was a timeout during a "random" callout check, Exim treated it as
7229 a failure of the random address, and carried on sending RSET and the real
7230 address. If the delay was just some slowness somewhere, the response to the
7231 original RCPT would be taken as a response to RSET and so on, causing
7232 mayhem of various kinds.
7234 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7235 when I implemented it. It didn't allow for the fact that some option values
7236 may legitimately be negative (e.g. size_addition), and it didn't even do
7237 the right test for positive values.
7239 48. Domain names in DNS records are case-independent. Exim always looks them up
7240 in lower case. Some resolvers return domain names in exactly the case they
7241 appear in the zone file, that is, they may contain uppercase letters. Not
7242 all resolvers do this - some return always lower case. Exim was treating a
7243 change of case by a resolver as a change of domain, similar to a widening
7244 of a domain abbreviation. This triggered its re-routing code and so it was
7245 trying to route what was effectively the same domain again. This normally
7246 caused routing to fail (because the router wouldn't handle the domain
7247 twice). Now Exim checks for this case specially, and just changes the
7248 casing of the domain that it ultimately uses when it transmits the message
7251 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7254 50. If a filter generated a file delivery with a non-absolute name (possible if
7255 no home directory exists for the router), the forbid_file option was not
7258 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7259 the existing equality matching.
7261 52. Exim was using ints instead of ino_t variables in some places where it was
7262 dealing with inode numbers.
7264 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7265 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7266 called TMPDIR, and if it finds it is different, it changes its value.
7268 54. The smtp_printf() function is now made available to local_scan() so
7269 additional output lines can be written before returning. There is also an
7270 smtp_fflush() function to enable the detection of a dropped connection.
7271 The variables smtp_input and smtp_batched_input are exported to
7274 55. Changed the default runtime configuration: the message "Unknown user"
7275 has been removed from the ACL, and instead placed on the localuser router,
7276 using the cannot_route_message feature. This means that any verification
7277 failures that generate their own messages won't get overridden. Similarly,
7278 the "Unrouteable address" message that was in the ACL for unverifiable
7279 relay addresses has also been removed.
7281 56. Added hosts_avoid_esmtp to the smtp transport.
7283 57. The exicyclog script was not checking for the esoteric option
7284 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7285 will work only if exicyclog is run under the appropriate euid.
7287 58. Following a discussion on the list, the rules by which Exim recognises line
7288 endings on incoming messages have been changed. The -dropcr and drop_cr
7289 options are now no-ops, retained only for backwards compatibility. The
7290 following line terminators are recognized: LF CRLF CR. However, special
7291 processing applies to CR:
7293 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7294 nor a local message in the state where . is a terminator.
7296 (ii) If a bare CR is encountered in a header line, an extra space is added
7297 after the line terminator so as not to end the header. The reasoning
7298 behind this is that bare CRs in header lines are most likely either
7299 to be mistakes, or people trying to play silly games.
7301 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7302 was being incorrectly given as 18 bytes larger than it should have been.
7303 This is a VOB (very old bug).
7305 60. This may never have affected anything current, but just in case it has:
7306 When the local host is found other than at the start of a list of hosts,
7307 the local host, those with the same MX, and any that follow, are discarded.
7308 When the list in question was part of a longer list of hosts, the following
7309 hosts (not currently being processed) were also being discarded. This no
7310 longer happens. I'm not sure if this situation could ever has previously
7313 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7316 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7317 header. This is something that is recommended in a new Internet Draft, and
7318 is something that is documented as being done by Sendmail. There are two
7319 possible values. For messages generated by the autoreply transport, Exim
7322 Auto-Submitted: auto-replied
7324 whereas for all other generated messages (e.g. bounces) it adds
7326 Auto-Submitted: auto-generated
7328 63. The "personal" condition in filters now includes a test for the
7329 Auto-Submitted: header. If it contains the string "auto-" the message it
7330 not considered personal.
7332 64. Added rcpt_include_affixes as a generic transport option.
7334 65. Added queue_only_override (default true).
7336 66. Added the syslog_duplication option.
7338 67. If what should have been the first header line of a message consisted of
7339 a space followed by a colon, Exim was mis-interpreting it as a header line.
7340 It isn't of course - it is syntactically invalid and should therefore be
7341 treated as the start of the message body. The misbehaviour could have
7342 caused a number of strange effects, including loss of data in subsequent
7343 header lines, and spool format errors.
7345 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7346 client host had authenticated. This control can now be exercised by an ACL
7347 for more flexibility.
7349 69. By default, callouts do not happen when testing with -bh. There is now a
7350 variant, -bhc, which does actually run the callout code, including
7351 consulting and updating the callout cache.
7353 70. Added support for saslauthd authentication, courtesy of Alexander
7356 71. If statvfs() failed on the spool or log directories while checking their
7357 size for availability, Exim confusingly gave the error "space shortage".
7358 Furthermore, in debugging mode it crashed with a floating point exception.
7359 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7360 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7361 serious problem, Exim now writes to the main and panic logs when this
7362 happens, with details of the failure. It then refuses to accept the
7363 incoming message, giving the message "spool directory problem" or "log
7364 directory problem" with a 421 code for SMTP messages.
7366 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7367 0, 1, and 2 exist, because some OS complain for execs without them (see
7368 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7369 descriptors. However, the code omitted to check that the open succeeded,
7370 causing mysterious errors if for some reason the permissions on /dev/null
7371 got screwed. Now Exim writes a message to the main and panic logs, and
7372 bombs out if it can't open /dev/null.
7374 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7375 interact so that it is all more flexible. It is supposed to remain
7376 backwards compatible. Also added extra_local_interfaces.
7378 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7379 to bomb out with an assertion failure - to the client this appears as a
7380 connection drop. This problem occurs in the part of the code that was taken
7381 from the Samba project. Fortunately, the assertion is in a very simple
7382 function, so I have fixed this by reproducing the function inline in the
7383 one place where it is called, and arranging for authentication to fail
7384 instead of killing the process with assert().
7386 75. The SPA client code was not working when the server requested OEM rather
7387 than Unicode encoding.
7389 76. Added code to make require_files with a specific uid setting more usable in
7390 the case where statting the file as root fails - usually a non-root-mounted
7391 NFS file system. When this happens and the failure is EACCES, Exim now
7392 forks a subprocess and does the per-uid checking as the relevant uid.
7394 77. Added process_log_path.
7396 78. If log_file_path was not explicitly set, a setting of check_log_space or
7397 check_log_inodes was ignored.
7399 79. If a space check for the spool or log partitions fails, the incident is now
7400 logged. Of course, in the latter case the data may get lost...
7402 80. Added the %p formatting code to string_format() so that it can be used to
7403 print addresses in debug_print(). Adjusted all the address printing in the
7404 debugging in store.c to use %p rather than %d.
7406 81. There was a concern that a line of code in smtp_in.c could overflow a
7407 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7408 initially expressed, the concern was not well-founded, because trailing
7409 spaces are removed early. However, if the trailing spaces were followed by
7410 a NULL, they did not get removed, so the overflow was possible. Two fixes
7413 (a) I re-wrote the offending code in a cleaner fashion.
7414 (b) If an incoming SMTP command contains a NULL character, it is rejected
7417 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7418 runs initgroups(), so that if the Exim user is in any additional groups,
7419 they will be used during message reception.
7425 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob