1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
12 side, to decode a TLS 1.3 packet capture.
14 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
15 Previously the default library behaviour applied, sending two, each in
18 JH/03 Debug output for ACL now gives the config file name and line number for
21 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
23 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
25 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
26 buffer overrun for (non-chunking) other transports.
28 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
29 TLS1.3, means that a server rejecting a client certificate is not visible
30 to the client until the first read of encrypted data (typically the
31 response to EHLO). Add detection for that case and treat it as a failed
32 TLS connection attempt, so that the normal retry-in-clear can work (if
35 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
36 and/or domain. Found and fixed by Jason Betts.
38 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
39 configuration). If a CNAME target was not a wellformed name pattern, a
42 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
43 the OS reports them interleaved with other addresses.
50 JH/01 Remove code calling the customisable local_scan function, unless a new
51 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
53 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
54 non-signal-safe functions being used.
56 JH/03 Bug 2269: When presented with a received message having a stupidly large
57 number of DKIM-Signature headers, disable DKIM verification to avoid
58 a resource-consumption attack. The limit is set at twenty.
60 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
61 report of oldest_pass in ${authres } in consequence, and separate out
62 some descriptions of reasons for verification fail.
64 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
65 files in the spool were present and unlocked. A queue-runner could spot
66 them, resulting in a duplicate delivery. Fix that by doing the unlock
67 after the unlink. Investigation by Tim Stewart. Take the opportunity to
68 add more error-checking on spoolfile handling while that code is being
71 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
72 No known attacks, no CVE, this is defensive hardening.
74 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
75 a queue-runner could start a delivery while other operations were ongoing.
76 Cutthrough delivery was a common victim, resulting in duplicate delivery.
77 Found and investigated by Tim Stewart. Fix by using the open message data
78 file handle rather than opening another, and not locally closing it (which
79 releases a lock) for that case, while creating the temporary .eml format
80 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
82 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
83 $sender_verify_failure/$recipient_verify_failure to "random".
85 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
88 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
89 Previously this would segfault.
91 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
94 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
95 like zero, since the resolver should be doing this for us, But we need one
96 as a CNAME but no MX presence gets the CNAME returned; we need to check
97 that doesn't point to an MX to declare it "no MX returned" rather than
98 "error, loop". A new main option is added so the older capability of
99 following some limited number of chain links is maintained.
101 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
103 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
104 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
105 now-deprecated earlier definitions used only specified the range up to TLS
106 1.2 (in the older-version library docs).
108 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
110 JH/15 Rework TLS client-side context management. Stop using a global, and
111 explicitly pass a context around. This enables future use of TLS for
112 connections to service-daemons (eg. malware scanning) while a client smtp
113 connection is using TLS; with cutthrough connections this is quite likely.
115 JH/16 Fix ARC verification to do AS checks in reverse order.
117 JH/17 Support a "tls" option on the ${readsocket } expansion item.
119 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
120 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
121 Previously the "utf8" would be re-prepended for every additional message.
123 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
124 Previously thery were accepted, resulting in issues when attempting to
125 forward messages to a non-supporting MTA.
127 PP/02 Let -n work with printing macros too, not just options.
129 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
130 one parent address was copied, and bogus data was used at delivery-logging
131 time. Either a crash (after delivery) or bogus log data could result.
132 Discovery and analysis by Tim Stewart.
134 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
135 Previously if the string ended mid-character, we did not insert the
136 promised '?' replacement.
138 PP/04 Documentation: current string operators work on bytes, not codepoints.
140 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
141 should pack well giving a smaller memory footprint so better caching and
142 therefore performance. Group the declarations where this can't be done so
143 that the byte-sized flag variables are not interspersed among pointer
144 variables, giving a better chance of good packing by the compiler.
146 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
147 non-null, to avoid issues with sites running BATV. Previously reports were
148 sent with an empty envelope sender so looked like bounces.
150 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
151 The ignore_error flag wasn't being returned from the filter subprocess so
152 was not set for later routers. Investigation and fix by Matthias Kurz.
154 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
155 and a msg:complete for the whole, when a message is manually removed using
156 -Mrm. Developement by Matthias Kurz, hacked on by JH.
158 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
159 a "Gnu special" function, asprintf() in the DB utility binary builds; I
160 hope that is portable enough.
162 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
163 requiring a known-CA anchor certificate; make it now rely entirely on the
164 TLSA as an anchor. Checking the name on the leaf cert against the name
165 on the A-record for the host is still done for TA (but not for EE mode).
167 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
168 included in delivery lines for non-proxied connections, when compiled with
169 SUPPORT_SOCKS and running with proxy logging enabled.
171 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
172 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
173 move the existing event to fire before the normal logging of message
174 failure so that custom logging is bracketed by normal logging.
176 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
177 msg:fail:internal event. Developement by Matthias Kurz.
179 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
180 far too small for todays use of crypto signatures stored there. Go all
181 the way to the max DNS message size of 64kB, even though this might be
182 overmuch for IOT constrained device use.
184 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
185 copy a string over itself. The library routine is documented as not
186 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
188 JH/32 For main options check_spool_space and check_inode_space, where the
189 platform supports 64b integers, support more than the previous 2^31 kB
190 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
191 the previous G, M, k.
193 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
194 $authenticated_fail_id variable on authentication failure. Previously
197 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
198 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
199 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
200 GNUTLS_SEC_PARAM_MEDIUM.
202 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
203 side. Previously we would continue as if no SNI had been received.
205 JH/36 Harden the handling of string-lists. When a list consisted of a sole
206 "<" character, which should be a list-separator specification, we walked
207 off past the nul-terimation.
209 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
210 causes) even when the retry time is not yet met. Previously they were
211 not, meaning that when (say) an account was over-quota and temp-rejecting,
212 and multiple senders' messages were queued, only one sender would get
213 notified on each configured delay_warning cycle.
215 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
217 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
218 cipher-suites, an error can be left on the stack even for a succeeding
219 accept; this results in impossible error messages when a later operation
222 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
223 return error codes indicating retry. Under TLS1.3 this becomes required.
225 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
226 it only wrote the new authenticators, resulting in a lack of tracking of
227 peer changes of ESMTP extensions until the next cache flush.
229 JH/41 Fix the loop reading a message header line to check for integer overflow,
230 and more-often against header_maxsize. Previously a crafted message could
231 induce a crash of the recive process; now the message is cleanly rejected.
233 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
234 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
240 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
241 When redis_servers is set to a list of > 1 element, and the Redis servers
242 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
243 case of MOVED into a DEFER case instead, thus moving the query onto the
244 next server in the list. For a cluster of N elements, all N servers must
245 be defined in redis_servers.
247 GF/02 Catch and remove uninitialized value warning in exiqsumm
248 Check for existence of @ARGV before looking at $ARGV[0]
250 JH/01 Replace the store_release() internal interface with store_newblock(),
251 which internalises the check required to safely use the old one, plus
252 the allocate and data copy operations duplicated in both (!) of the
253 extant use locations.
255 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
256 modifier. This matches the restriction on the commandline.
258 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
259 Previously only the last row was returned.
261 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
262 we assumed that tags in the header were well-formed, and parsed the
263 element content after inspecting only the first char of the tag.
264 Assumptions at that stage could crash the receive process on malformed
267 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
268 While running the DKIM ACL we operate on the Permanent memory pool so that
269 variables created with "set" persist to the DATA ACL. Also (at any time)
270 DNS lookups that fail create cache records using the Permanent pool. But
271 expansions release any allocations made on the current pool - so a dnsdb
272 lookup expansion done in the DKIM ACL releases the memory used for the
273 DNS negative-cache, and bad things result. Solution is to switch to the
274 Main pool for expansions.
275 While we're in that code, add checks on the DNS cache during store_reset,
276 active in the testsuite.
277 Problem spotted, and debugging aided, by Wolfgang Breyha.
279 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
280 When none of the hosts presented to a transport match an already-open
281 connection, close it and proceed with the list. Previously we would
282 queue the message. Spotted by Lena with Yahoo, probably involving
285 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
286 Previously a spurious "250 OK id=" response was appended to the proper
289 JH/08 The "support for" informational output now, which built with Content
290 Scanning support, has a line for the malware scanner interfaces compiled
291 in. Interface can be individually included or not at build time.
293 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
294 by the template makefile "src/EDITME". The "STREAM" support for an older
295 ClamAV interface method is removed.
297 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
298 rows affected is given instead).
300 JH/11 The runtime Berkeley DB library version is now additionally output by
301 "exim -d -bV". Previously only the compile-time version was shown.
303 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
304 SMTP connection. Previously, when one had more receipients than the
305 first, an abortive onward connection was made. Move to full support for
306 multiple onward connections in sequence, handling cutthrough connection
307 for all multi-message initiating connections.
309 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
310 routers. Previously, a multi-recipient message would fail to match the
311 onward-connection opened for the first recipient, and cause its closure.
313 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
314 a timeout on read on a GnuTLS initiating connection, resulting in the
315 initiating connection being dropped. This mattered most when the callout
316 was marked defer_ok. Fix to keep the two timeout-detection methods
319 JH/15 Relax results from ACL control request to enable cutthrough, in
320 unsupported situations, from error to silently (except under debug)
321 ignoring. This covers use with PRDR, frozen messages, queue-only and
324 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
326 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
327 metadata, resulting in a crash in free().
329 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
330 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
331 Broken also in d185889f4, with init system revamp.
333 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
334 Previously we abruptly closed the connection after reading a malware-
335 found indication; now we go on to read the "scan ok" response line,
338 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
339 ACL. Previously, a crash would result.
341 JH/19 Speed up macro lookups during configuration file read, by skipping non-
342 macro text after a replacement (previously it was only once per line) and
343 by skipping builtin macros when searching for an uppercase lead character.
345 JH/20 DANE support moved from Experimental to mainline. The Makefile control
346 for the build is renamed.
348 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
349 was allocated for every new TLS startup, meaning one per message. Fix
350 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
352 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
353 reported the original. Fix to report (as far as possible) the ACL
354 result replacing the original.
356 JH/23 Fix memory leak during multi-message connections using STARTTLS under
357 OpenSSL. Certificate information is loaded for every new TLS startup,
358 and the resources needed to be freed.
360 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
362 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
365 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
366 DATA response info to the (existing) per-recipient response info for
367 the "C=" log element. It can have useful tracking info from the
368 destination system. Patch from Simon Arlott.
370 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
371 length value. Previously this would segfault.
373 HS/02 Support Avast multiline protoocol, this allows passing flags to
374 newer versions of the scanner.
376 JH/28 Ensure that variables possibly set during message acceptance are marked
377 dead before release of memory in the daemon loop. This stops complaints
378 about them when the debug_store option is enabled. Discovered specifically
379 for sender_rate_period, but applies to a whole set of variables.
380 Do the same for the queue-runner and queue-list loops, for variables set
381 from spool message files. Do the same for the SMTP per-message loop, for
382 certain variables indirectly set in ACL operations.
384 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
385 as a multi-recipient message from a mailinglist manager). The coding had
386 an arbitrary cutoff number of characters while checking for more input;
387 enforced by writing a NUL into the buffer. This corrupted long / fast
388 input. The problem was exposed more widely when more pipelineing of SMTP
389 responses was introduced, and one Exim system was feeding another.
390 The symptom is log complaints of SMTP syntax error (NUL chars) on the
391 receiving system, and refused recipients seen by the sending system
392 (propating to people being dropped from mailing lists).
393 Discovered and pinpointed by David Carter.
395 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
396 replaced by the ${authresults } expansion.
398 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
400 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
401 allows proper process termination in container environments.
403 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
404 Previously the "final dot" had a newline after it; ensure it is CR,LF.
406 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
407 and "err_perm", deprecated since 4.83 when the RFC-defined words
408 "temperror" and "permerror" were introduced.
410 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
411 transport-filters or DKIM-signing. The restriction was lost in the
412 consolidation of verify-callout and delivery SMTP handling.
413 Extend the restriction to also cover ARC-signing.
415 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
416 in defer=pass mode supply a 450 to the initiator. Previously the message
419 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
420 tls_require_ciphers is used as before.
422 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
423 "pass_unscanned". Only tmpfails from the scanner are written to
424 the paniclog, as they may require admin intervention (permission
425 denied, license issues). Other scanner errors (like decompression
426 bombs) do not cause a paniclog entry.
428 JH/36 Fix reinitialisation of DKIM logging variable between messages.
429 Previously it was possible to log spurious information in receive log
432 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
433 triggered odd behaviour from Outlook Express clients.
435 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
438 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
439 since the IETF WG has not yet settled on that versus the original
440 "bare" representation.
442 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
443 Previously the millisecond value corrupted the output.
444 Fix also for syslog_pid=no and log_selector +pid, for which the pid
445 corrupted the output.
451 JH/01 Rework error string handling in TLS interface so that the caller in
452 more cases is responsible for logging. This permits library-sourced
453 string to be attached to addresses during delivery, and collapses
454 pairs of long lines into single ones.
456 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
457 during configuration. Wildcards are allowed and expanded.
459 JH/02 Rework error string handling in DKIM to pass more info back to callers.
460 This permits better logging.
462 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
463 do not close it down and have the child transport start it up again on
464 the passed-on TCP connection. Instead, proxy the child (and any
465 subsequent ones) for TLS via a unix-domain socket channel. Logging is
466 affected: the continued delivery log lines do not have any DNSSEC, TLS
467 Certificate or OCSP information. TLS cipher information is still logged.
469 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
470 identical IP addresses on different listening ports. Will also affect
473 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
474 add noisy ifdef guards to special-case this sillyness.
475 Patch from Bernd Kuhls.
477 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
478 than 255 are no longer allowed.
480 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
481 Disable the session-cache too, which might reduce our load. Since we
482 currrectly use a new context for every connection, both as server and
483 client, there is no benefit for these.
484 GnuTLS appears to not support tickets server-side by default (we don't
485 call gnutls_session_ticket_enable_server()) but client side is enabled
486 by default on recent versions (3.1.3 +) unless the PFS priority string
489 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
490 <https://reproducible-builds.org/specs/source-date-epoch/>.
492 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
493 the check for any unsuccessful recipients did not notice the limit, and
494 erroneously found still-pending ones.
496 JH/08 Pipeline CHUNKING command and data together, on kernels that support
497 MSG_MORE. Only in-clear (not on TLS connections).
499 JH/09 Avoid using a temporary file during transport using dkim. Unless a
500 transport-filter is involved we can buffer the headers in memory for
501 creating the signature, and read the spool data file once for the
502 signature and again for transmission.
504 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
505 4.77 as the kernel support then wasn't solid, having issues in 64bit
506 mode. Now, it's been long enough. Add support for FreeBSD also.
508 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
509 case where the routing stage had gathered several addresses to send to
510 a host before calling the transport for the first, we previously failed
511 to close down TLS in the old transport process before passing the TCP
512 connection to the new process. The new one sent a STARTTLS command
513 which naturally failed, giving a failed delivery and bloating the retry
514 database. Investigation and fix prototype from Wolfgang Breyha.
516 JH/12 Fix check on SMTP command input synchronisation. Previously there were
517 false-negatives in the check that the sender had not preempted a response
518 or prompt from Exim (running as a server), due to that code's lack of
519 awareness of the SMTP input buffering.
521 PP/04 Add commandline_checks_require_admin option.
522 Exim drops privileges sanely, various checks such as -be aren't a
523 security problem, as long as you trust local users with access to their
524 own account. When invoked by services which pass untrusted data to
525 Exim, this might be an issue. Set this option in main configuration
526 AND make fixes to the calling application, such as using `--` to stop
529 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
530 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
531 responses to those, into a single TLS record each way (this usually means
532 a single packet). As a side issue, smtp_enforce_sync now works on TLS
535 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
536 affects you only if you're dancing at the edge of the param size limits.
537 If you are, and this message makes sense to you, then: raise the
538 configured limit or use OpenSSL 1.1. Nothing we can do for older
541 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
542 cmdline element to get the documented default one. Previously it was
545 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
546 are unsuable for non-message-specific reasons - eg. connection timeout,
547 banner-time rejection.
549 JH/16 Fix logging of delivery remote port, when specified by router, under
552 PP/06 Repair manualroute's ability to take options in any order, even if one
553 is the name of a transport.
556 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
558 JH/17 Change the list-building routines interface to use the expanding-string
559 triplet model, for better allocation and copying behaviour.
561 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
562 Previously it was constructed the first time a possibly-matching string
563 was met in the configuration file input during startup; now it is done
566 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
567 compatible one, to avoid the (poorly documented) possibility of a config
568 file in the working directory redirecting the DB files, possibly correpting
569 some existing file. CVE-2017-10140 assigned for BDB.
571 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
572 cache-hot. Previously, although the result was properly cached, the
573 initial verify call returned a defer.
575 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
576 the main verify for receipient in uncached-mode.
578 JH/22 Retire historical build files to an "unsupported" subdir. These are
579 defined as "ones for which we have no current evidence of testing".
581 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
582 if present. Previously it was ignored.
584 JH/24 Start using specified-initialisers in C structure init coding. This is
585 a C99 feature (it's 2017, so now considered safe).
587 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
588 if was a fixed-sized field and bitmask ops via macros; it is now more
591 PP/07 GitHub PR 56: Apply MariaDB build fix.
592 Patch provided by Jaroslav Škarvada.
594 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
595 during Coverity cleanups [4.87 JH/47]
596 Diagnosis and fix provided by Michael Fischer v. Mollard.
598 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
599 the right size to place the terminating semicolon on its own folded
600 line, the header hash was calculated to an incorrect value thanks to
601 the (relaxed) space the fold became.
603 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
604 and confused the parent.
606 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
607 which could crash as a result. This could lead to undeliverable messages.
609 JH/28 Logging: "next input sent too soon" now shows where input was truncated
612 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
613 matters on fast-turnover and PID-randomising systems, which were getting
614 out-of-order delivery.
616 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
617 a possibly-overlapping copy. The symptom was that "Remote host closed
618 connection in response to HELO" was logged instead of the actual 4xx
621 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
622 Previously only that bufferd was discarded, resulting in SYMTP command
625 JH/32 DKIM: when a message has multiple signatures matching an identity given
626 in dkim_verify_signers, run the dkim acl once for each. Previously only
627 one run was done. Bug 2189.
629 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
630 "panic the current process" to "deliberately defer". The panic log is
631 still written with the problem list name; the mail and reject logs now
632 get a temp-reject line for the message that was being handled, saying
633 something like "domains check lookup or other defer". The SMTP 451
634 message is still "Temporary local problem".
636 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
637 A crafted sequence of BDAT commands could result in in-use memory beeing
638 freed. CVE-2017-16943.
640 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
641 from SMTP input. Previously it was always done; now only done for DATA
642 and not BDAT commands. CVE-2017-16944.
644 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
645 to the message (such as an overlong header line). Previously this was
646 not done and we did not exit BDAT mode. Followon from the previous item
647 though a different problem.
653 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
654 than -2003 did; needs libidn2 in addition to libidn.
656 JH/02 The path option on a pipe transport is now expanded before use.
658 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
659 Patch provided by "Björn", documentation fix added too.
661 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
662 missing a wire-to-host endian conversion.
664 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
665 close after a BDAT command line could be taken as a following command,
666 giving a synch failure. Fix by only checking for synch immediately
667 before acknowledging the chunk.
669 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
670 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
671 macro. Patches provided by Josh Soref.
673 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
674 Previously we did not; the RFC seems ambiguous and VRFY is not listed
675 by IANA as a service extension. However, John Klensin suggests that we
678 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
679 the dkim code may be unix-mode line endings rather than smtp wire-format
680 CRLF, so prepend a CR to any bare LF.
682 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
683 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
685 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
686 the first were themselves being wrongly included in the feed into dkim
687 processing; with most chunk sizes in use this resulted in an incorrect
688 body hash calculated value.
690 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
691 DKIM signature block, for verification. Although advised against by
692 standards it is specifically not ruled illegal.
694 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
696 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
697 missing a body hash (the bh= tag).
699 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
700 It seems that HAProxy sends the Proxy Protocol information in clear and
701 only then does a TLS startup, so do the same.
703 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
704 TCP connections (such as for Spamd) unless the daemon successfully set
705 Fast Open mode on its listening sockets. This fixes breakage seen on
706 too-old kernels or those not configured for Fast Open, at the cost of
707 requiring both directions being enabled for TFO, and TFO never being used
708 by non-daemon-related Exim processes.
710 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
711 endings, at least on the first header line. Try to canonify any that get
712 past that check, despite the cost.
714 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
715 now limited to an arbitrary five deep, while parsing addresses with the
716 strip_excess_angle_brackets option enabled.
718 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
719 instead leave the unprompted TLS handshake in socket buffer for the
720 TLS library to consume.
722 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
724 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
726 JH/16 Drop variables when they go out of scope. Memory management drops a whole
727 region in one operation, for speed, and this leaves assigned pointers
728 dangling. Add checks run only under the testsuite which checks all
729 variables at a store-reset and panics on a dangling pointer; add code
730 explicitly nulling out all the variables discovered. Fixes one known
731 bug: a transport crash, where a dangling pointer for $sending_ip_address
732 originally assigned in a verify callout, is re-used.
734 PP/06 Drop '.' from @INC in various Perl scripts.
736 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
738 PP/08 Reduce a number of compilation warnings under clang; building with
739 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
740 should be warning-free.
742 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
744 HS/01 Fix portability problems introduced by PP/08 for platforms where
745 realloc(NULL) is not equivalent to malloc() [SunOS et al].
747 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
748 chunk. This allows us to accept broken chunked messages. We need a more
749 general solution here.
751 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
752 already-broken messages in the queue.
754 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
756 JH/19 Fix reference counting bug in routing-generated-address tracking.
762 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
763 supports it and a size is available (ie. the sending peer gave us one).
765 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
766 years of being deprecated). The replacements are the ACLs
767 acl_smtp_mime and acl_not_smtp_mime.
769 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
770 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
771 or even an in-clear connection were permitted. Now, if the host lookup
772 was dnssec and dane was requested then the host is only used if the
773 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
774 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
775 if one fails this test.
776 This means that a poorly-configured remote DNS will make it incommunicado;
777 but it protects against a DNS-interception attack on it.
779 JH/04 Bug 1810: make continued-use of an open smtp transport connection
780 non-noisy when a race steals the message being considered.
782 JH/05 If main configuration option tls_certificate is unset, generate a
783 self-signed certificate for inbound TLS connections.
785 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
786 in rewrites and routers.
788 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
789 and logged a warning sing 4.83; now they are a configuration file error.
791 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
792 (lacking @domain). Apply the same qualification processing as RCPT.
794 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
796 JH/10 Support ${sha256:} applied to a string (as well as the previous
799 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
800 a cutthrough deliver is pending, as we always want to make a connection.
801 This also avoids re-routing the message when later placing the cutthrough
802 connection after a verify cache hit.
803 Do not update it with the verify result either.
805 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
806 when routing results in more than one destination address.
808 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
809 signing (which inhibits the cutthrough capability). Previously only
810 the presence of an option was tested; now an expansion evaluating as
811 empty is permissible (obviously it should depend only on data available
812 when the cutthrough connection is made).
814 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
815 the relevant preceding SMTP command did not note the pipelining mode.
817 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
818 Previously they were not counted.
820 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
821 as one having no matching records. Previously we deferred the message
822 that needed the lookup.
824 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
825 distinguished as "(=".
827 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
828 for missing MX records. Previously it only worked for missing A records.
830 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
832 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
833 after the data-go-ahead and data-ack. Patch from Jason Betts.
835 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
836 even for a "none" policy. Patch from Tony Meyer.
838 JH/22 Fix continued use of a connection for further deliveries. If a port was
839 specified by a router, it must also match for the delivery to be
842 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
843 When one of the recipients of a message was unsuitable for the connection
844 (has no matching addresses), we lost track of needing to mark it
845 deferred. As a result mail would be lost.
847 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
849 JH/25 Decoding ACL controls is now done using a binary search; the source code
850 takes up less space and should be simpler to maintain. Merge the ACL
851 condition decode tables also, with similar effect.
853 JH/26 Fix problem with one_time used on a redirect router which returned the
854 parent address unchanged. A retry would see the parent address marked as
855 delivered, so not attempt the (identical) child. As a result mail would
858 JH/27 Fix a possible security hole, wherein a process operating with the Exim
859 UID can gain a root shell. Credit to http://www.halfdog.net/ for
860 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
863 JH/28 Enable {spool,log} filesystem space and inode checks as default.
864 Main config options check_{log,spool}_{inodes,space} are now
865 100 inodes, 10MB unless set otherwise in the configuration.
867 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
868 Previously it only applied to the main-section connection policy
871 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
873 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
874 by me. Added RFC7919 DH primes as an alternative.
876 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
877 are not in the system include path.
879 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
880 GnuTLS, when a session startup failed (eg because the client disconnected)
881 Exim did stdio operations after fclose. This was exposed by a recent
882 change which nulled out the file handle after the fclose.
884 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
885 signed directly by the cert-signing cert, rather than an intermediate
886 OCSP-signing cert. This is the model used by LetsEncrypt.
888 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
890 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
891 an incoming connection.
893 HS/02 Bug 1802: Do not half-close the connection after sending a request
896 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
897 fallback to "prime256v1".
899 JH/34 SECURITY: Use proper copy of DATA command in error message.
900 Could leak key material. Remotely exploitable. CVE-2016-9963.
906 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
907 and 3.4.4 - once the server is enabled to respond to an OCSP request
908 it does even when not requested, resulting in a stapling non-aware
909 client dropping the TLS connection.
911 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
912 support variable-length bit vectors. No functional change.
914 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
915 The I= interface field on outgoing lines is now after the H= remote
916 host field, same as incoming lines. There is a separate
917 outgoing_interface log selector which allows you to disable the
920 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
921 If not running log_selector +smtp_connection the mainlog would be held
922 open indefinitely after a "too many connections" event, including to a
923 deleted file after a log rotate. Leave the per net connection logging
924 leaving it open for efficiency as that will be quickly detected by the
925 check on the next write.
927 HS/01 Bug 1671: Fix post transport crash.
928 Processing the wait-<transport> messages could crash the delivery
929 process if the message IDs didn't exist for some reason. When
930 using 'split_spool_directory=yes' the construction of the spool
931 file name failed already, exposing the same netto behaviour.
933 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
934 mime_regex ACL conditions.
936 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
937 to DSN fail messages (bounces): remote IP, remote greeting, remote response
938 to HELO, local diagnostic string.
940 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
941 log line to debug. Even when configured with a tls authenticator many
942 client connections are expected to not authenticate in this way, so
943 an authenticate fail is not an error.
945 HS/02 Add the Exim version string to the process info. This way exiwhat
946 gives some more detail about the running daemon.
948 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
949 matter for fast-change records such as DNSBLs.
951 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
952 retry record, even if constant. There may be multiple transports with
953 different interface settings and the retry behaviour needs to be kept
956 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
958 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
960 JH/10 Bug 840: fix log_defer_output option of pipe transport
962 JH/11 Bug 830: use same host for all RCPTS of a message, even under
963 hosts_randomize. This matters a lot when combined with mua_wrapper.
965 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
966 ${quote_pgsql:<string>} operator.
968 JH/13 Bug 1708: avoid misaligned access in cached lookup.
970 JH/14 Change header file name for freeradius-client. Relevant if compiling
971 with Radius support; from the Gentoo tree and checked under Fedora.
973 JH/15 Bug 1712: Introduce $prdr_requested flag variable
975 JH/16 Bug 1714: Permit an empty string as expansion result for transport
976 option transport_filter, meaning no filtering.
978 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
980 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
981 defaults to "*" (all hosts). The variable is now available when not built
982 with TLS, default unset, mainly to enable keeping the testsuite sane.
983 If a server certificate is not supplied (via tls_certificate) an error is
984 logged, and clients will find TLS connections fail on startup. Presumably
985 they will retry in-clear.
986 Packagers of Exim are strongly encouraged to create a server certificate
987 at installation time.
989 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
990 with the $config_file variable.
992 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
993 in transport context, after the attempt, and per-recipient. The latter type
994 is per host attempted. The event data is the error message, and the errno
995 information encodes the lookup type (A vs. MX) used for the (first) host,
996 and the trailing two digits of the smtp 4xx response.
998 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
999 to write to mainlog (or rejectlog, paniclog) in the window between file
1000 creation and permissions/ownership being changed. Particularly affects
1001 installations where exicyclog is run as root, rather than exim user;
1002 result is that the running daemon panics and dies.
1004 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1006 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1007 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1008 "pri" and "weight". Note that the previous implicit priority given by the
1009 list order is no longer honoured.
1011 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1012 for DKIM processing.
1014 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1015 by defining SUPPORT_SOCKS.
1017 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1018 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1019 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1020 variables are renamed to proxy_{local,external}_{address,port}.
1022 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1023 for a build by defining SUPPORT_I18N
1025 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1026 of the query string, and make ${quote_redis:} do that quoting.
1028 JH/29 Move Events support from Experimental to mainline, enabled by default
1029 and removable for a build by defining DISABLE_EVENT.
1031 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1033 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1034 cached by the daemon.
1036 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1037 by defining LOOKUP_REDIS. The libhiredis library is required.
1039 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1040 keys are given for lookup.
1042 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1043 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1044 only supported when built with TLS support. The PolarSSL SHA routines
1045 are still used when the TLS library is too old for convenient support.
1047 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1048 openssl_options), for security. OpenSSL forces this from version 1.1.0
1049 server-side so match that on older versions.
1051 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1052 allocation for $value could be released as the expansion processing
1053 concluded, but leaving the global pointer active for it.
1055 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1056 and to use the domains and local_parts ACL conditions.
1058 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1059 incorrectly not doubled on cutthrough transmission, hence seen as a
1060 body-termination at the receiving system - resulting in truncated mails.
1061 Commonly the sender saw a TCP-level error, and retransmitted the message
1062 via the normal store-and-forward channel. This could result in duplicates
1063 received - but deduplicating mailstores were liable to retain only the
1064 initial truncated version.
1066 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1068 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1070 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1071 we're in there, support oversigning also; bug 1309.
1073 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1075 HS/04 Add support for keep_environment and add_environment options.
1077 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1078 either intentional arithmetic overflow during PRNG, or testing config-
1081 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1082 delivery resulted in actual delivery. Cancel cutthrough before DATA
1085 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1086 rejects a recipient: pass the reject to the originator.
1088 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1089 Many were false-positives and ignorable, but it's worth fixing the
1092 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1093 for the new environment-manipulation done at startup. Move the routines
1094 from being local to tls.c to being global via the os.c file.
1096 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1097 an extract embedded as result-arg for a map, the first arg for extract
1098 is unavailable so we cannot tell if this is a numbered or keyed
1099 extraction. Accept either.
1105 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1108 JH/02 The smtp transport option "multi_domain" is now expanded.
1110 JH/03 The smtp transport now requests PRDR by default, if the server offers
1113 JH/04 Certificate name checking on server certificates, when exim is a client,
1114 is now done by default. The transport option tls_verify_cert_hostnames
1115 can be used to disable this per-host. The build option
1116 EXPERIMENTAL_CERTNAMES is withdrawn.
1118 JH/05 The value of the tls_verify_certificates smtp transport and main options
1119 default to the word "system" to access the system default CA bundle.
1120 For GnuTLS, only version 3.0.20 or later.
1122 JH/06 Verification of the server certificate for a TLS connection is now tried
1123 (but not required) by default. The verification status is now logged by
1124 default, for both outbound TLS and client-certificate supplying inbound
1127 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1130 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1131 Status Notification (bounce) messages are now MIME format per RFC 3464.
1132 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1133 under the control of the dsn_advertise_hosts option, and routers may
1134 have a dsn_lasthop option.
1136 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1137 default, modifiable by a malware= option. The list separator for
1138 the options can now be changed in the usual way. Bug 68.
1140 JH/10 The smtp_receive_timeout main option is now expanded before use.
1142 JH/11 The incoming_interface log option now also enables logging of the
1143 local interface on delivery outgoing connections.
1145 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1146 if the interface and destination host and port all match.
1148 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1151 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1152 Patch from Andrew Lewis.
1154 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1155 now supports optional time-restrictions, weighting, and priority
1156 modifiers per server. Patch originally by <rommer@active.by>.
1158 JH/16 The spamd_address main option now supports a mixed list of local
1159 and remote servers. Remote servers can be IPv6 addresses, and
1160 specify a port-range.
1162 JH/17 Bug 68: The spamd_address main option now supports an optional
1163 timeout value per server.
1165 JH/18 Bug 1581: Router and transport options headers_add/remove can
1166 now have the list separator specified.
1168 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1171 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1174 JH/21 Support for the A6 type of dns record is withdrawn.
1176 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1177 rather than the verbs used.
1179 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1180 from 255 to 1024 chars.
1182 JH/24 Verification callouts now attempt to use TLS by default.
1184 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1185 are generic router options now. The defaults didn't change.
1187 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1188 Original patch from Alexander Shikoff, worked over by JH.
1190 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1191 files if ZCAT_COMMAND is not executable.
1193 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1195 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1197 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1198 Normally benign, it bites when the pair was led to by a CNAME;
1199 modern usage is to not canonicalize the domain to a CNAME target
1200 (and we were inconsistent anyway for A-only vs AAAA+A).
1202 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1204 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1205 when evaluating $sender_host_dnssec.
1207 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1208 $sender_helo_dnssec variable.
1210 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1212 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1214 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1216 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1217 documented as working, but never had. Support all but $spam_report.
1219 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1220 added for tls authenticator.
1222 HS/03 Add perl_taintmode main config option
1228 TL/01 When running the test suite, the README says that variables such as
1229 no_msglog_check are global and can be placed anywhere in a specific
1230 test's script, however it was observed that placement needed to be near
1231 the beginning for it to behave that way. Changed the runtest perl
1232 script to read through the entire script once to detect and set these
1233 variables, reset to the beginning of the script, and then run through
1234 the script parsing/test process like normal.
1236 TL/02 The BSD's have an arc4random API. One of the functions to induce
1237 adding randomness was arc4random_stir(), but it has been removed in
1238 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1239 function when detected.
1241 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1242 cause callback expansion.
1244 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1245 syntax errors in an expansion can be treated as a string instead of
1246 logging or causing an error, due to the internal use of bool_lax
1247 instead of bool when processing it.
1249 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1250 server certificates when making smtp deliveries.
1252 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1254 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1256 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1258 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1259 Merged patch from Sebastian Wiedenroth.
1261 JH/05 Fix results-pipe from transport process. Several recipients, combined
1262 with certificate use, exposed issues where response data items split
1263 over buffer boundaries were not parsed properly. This eventually
1264 resulted in duplicates being sent. This issue only became common enough
1265 to notice due to the introduction of connection certificate information,
1266 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1268 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1269 size buffer was used, resulting in syntax errors when an expansion
1272 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1273 version 3.3.6 or later.
1275 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1276 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1277 both become "event_action", the variables become $event_name, $event_data
1278 and $event_defer_errno. There is a new variable $verify_mode, usable in
1279 routers, transports and related events. The tls:cert event is now also
1280 raised for inbound connections, if the main configuration event_action
1283 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1284 early OCSP support, but no stapling (appears to be less than 1.0.0).
1286 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1287 server certificate names available under the smtp transport option
1288 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1291 JH/10 Time-related extraction expansions from certificates now use the main
1292 option "timezone" setting for output formatting, and are consistent
1293 between OpenSSL and GnuTLS compilations. Bug 1541.
1295 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1296 encoded parameter in the incoming message. Bug 1558.
1298 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1299 include certificate info, eximon was claiming there were spoolfile
1302 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1304 JH/14 Log delivery-related information more consistently, using the sequence
1305 "H=<name> [<ip>]" wherever possible.
1307 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1308 are problematic for Debian distribution, omit them from the release
1311 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1313 JH/16 Fix string representation of time values on 64bit time_t architectures.
1316 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1317 output list separator was used.
1322 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1323 checkers that were complaining about end of non-void function with no
1326 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1327 This was a regression introduced in 4.83 by another bugfix.
1329 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1331 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1332 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1338 TF/01 Correctly close the server side of TLS when forking for delivery.
1340 When a message was received over SMTP with TLS, Exim failed to clear up
1341 the incoming connection properly after forking off the child process to
1342 deliver the message. In some situations the subsequent outgoing
1343 delivery connection happened to have the same fd number as the incoming
1344 connection previously had. Exim would try to use TLS and fail, logging
1345 a "Bad file descriptor" error.
1347 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1348 utilities have not been installed.
1350 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1351 temporary space as the ACL may create new global variables.
1353 TL/01 LDAP support uses per connection or global context settings, depending
1354 upon the detected version of the libraries at build time.
1356 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1357 to extract and use the src ip:port in logging and expansions as if it
1358 were a direct connection from the outside internet. PPv2 support was
1359 updated based on HAProxy spec change in May 2014.
1361 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1363 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1364 Properly escape header and check for NULL return.
1366 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1369 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1371 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1372 characters in header names, implemented as a verify condition.
1373 Contributed by Michael Fischer v. Mollard.
1375 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1376 results permerror and temperror. Previous values are deprecated but
1377 still accepted. In a future release, err_perm and err_temp will be
1378 completely removed, which will be a backward incompatibility if the
1379 ACL tests for either of these two old results. Patch contributed by
1380 user bes-internal on the mailing list.
1382 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1384 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1385 selectors, in both main and reject logs.
1387 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1390 JH/07 Add malware type "sock" for talking to simple daemon.
1392 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1394 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1395 routers/transports under cutthrough routing.
1397 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1398 numbers. Touch up "bool" conditional to keep the same definition.
1400 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1402 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1404 JH/12 Expand items in router/transport headers_add or headers_remove lists
1405 individually rather than the list as a whole. Bug 1452.
1407 Required for reasonable handling of multiple headers_ options when
1408 they may be empty; requires that headers_remove items with embedded
1409 colons must have them doubled (or the list-separator changed).
1411 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1412 view the policy declared in the DMARC record. Currently, $dmarc_status
1413 is a combined value of both the record presence and the result of the
1416 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1418 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1419 dnslookup router and the smtp transport (applying to the forward
1422 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1423 of ldap servers used for a specific lookup. Patch provided by Heiko
1426 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1427 New variable $lookup_dnssec_authenticated for observability.
1429 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1430 Patch submitted by Lars Timman.
1432 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1434 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1435 Requires trusted mode and valid format message id, aborts otherwise.
1436 Patch contributed by Heiko Schlichting.
1438 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1439 certextract with support for various fields. Bug 1358.
1441 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1442 is requested by default, modifiable by smtp transport option
1445 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1446 operate on certificate variables to give certificate fingerprints
1447 Also new ${sha256:cert_variable}.
1449 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1451 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1452 Christian Aistleitner.
1454 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1456 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1457 file. Patch from Wolfgang Breyha.
1459 JH/25 Expand the coverage of the delivery $host and $host_address to
1460 client authenticators run in verify callout. Bug 1476.
1462 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1463 align with daemon_smtp_ports. Bug 72.
1465 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1466 support and error reporting did not work properly.
1468 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1469 and is readable. Patch from Andrew Colin Kissa.
1471 TL/14 Enhance documentation of ${run expansion and how it parses the
1472 commandline after expansion, particularly in the case when an
1473 unquoted variable expansion results in an empty value.
1475 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1477 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1478 by renaming away from it. Addresses GH issue 15, reported by
1481 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1483 TL/15 SECURITY: prevent double expansion in math comparison functions
1484 (can expand unsanitized data). Not remotely exploitable.
1491 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1493 PP/02 Make -n do something, by making it not do something.
1494 When combined with -bP, the name of an option is not output.
1496 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1499 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1500 $sender_host_name and config options to manage this, and basic check
1503 PP/05 DSCP support for outbound connections and control modifier for inbound.
1505 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1506 (Only plugin which currently uses this is kerberos4, which nobody should
1507 be using, but we should make it available and other future plugins might
1508 conceivably use it, even though it would break NAT; stuff *should* be
1509 using channel bindings instead).
1511 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1512 name; added for Sendmail compatibility; requires admin caller.
1513 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1514 just ignore it); requires trusted caller.
1515 Also parse but ignore: -Ac -Am -X<logfile>
1518 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1520 TL/02 Add +smtp_confirmation as a default logging option.
1522 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1523 Patch by Magnus Holmgren from 2007-02-20.
1525 TL/04 Bugzilla 1281 - Spec typo.
1526 Bugzilla 1283 - Spec typo.
1527 Bugzilla 1290 - Spec grammar fixes.
1529 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1531 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1533 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1534 mailing list by by Dmitry Isaikin.
1536 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1538 JH/02 Support "G" suffix to numbers in ${if comparisons.
1540 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1542 NM/01 Bugzilla 1197 - Spec typo
1543 Bugzilla 1196 - Spec examples corrections
1545 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1547 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1548 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1551 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1552 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1554 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1555 "acl {{name}{arg}...}", and optional args on acl condition
1558 JH/05 Permit multiple router/transport headers_add/remove lines.
1560 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1562 JH/07 Avoid using a waiting database for a single-message-only transport.
1563 Performance patch from Paul Fisher. Bugzilla 1262.
1565 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1568 JH/09 Add $headers_added variable, with content from use of ACL modifier
1569 add_header (but not yet added to the message). Bugzilla 199.
1571 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1572 Pulled from Bugzilla 817 by Wolfgang Breyha.
1574 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1576 (nb: this is the same fix as in Exim 4.80.1)
1578 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1581 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1584 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1586 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1587 advertise SMTP AUTH mechanism to us, instead of a generic
1588 protocol violation error. Also, make Exim more robust to bad
1589 data from the Dovecot auth socket.
1591 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1593 When a queue runner is handling a message, Exim first routes the
1594 recipient addresses, during which it prunes them based on the retry
1595 hints database. After that it attempts to deliver the message to
1596 any remaining recipients. It then updates the hints database using
1599 So if a recipient address works intermittently, it can get repeatedly
1600 deferred at routing time. The retry hints record remains fresh so the
1601 address never reaches the final cutoff time.
1603 This is a fairly common occurrence when a user is bumping up against
1604 their storage quota. Exim had some logic in its local delivery code
1605 to deal with this. However it did not apply to per-recipient defers
1606 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1608 This change adds a proper retry rule check during routing so that the
1609 final cutoff time is checked against the message's age. We only do
1610 this check if there is an address retry record and there is not a
1611 domain retry record; this implies that previous attempts to handle
1612 the address had the retry_use_local_parts option turned on. We use
1613 this as an approximation for the destination being like a local
1614 delivery, as in LMTP.
1616 I suspect this new check makes the old local delivery cutoff check
1617 redundant, but I have not verified this so I left the code in place.
1619 TF/02 Correct gecos expansion when From: is a prefix of the username.
1621 Test 0254 submits a message to Exim with the header
1625 When I ran the test suite under the user fanf2, Exim expanded
1626 the header to contain my full name, whereas it should have added
1627 a Resent-Sender: header. It erroneously treats any prefix of the
1628 username as equal to the username.
1630 This change corrects that bug.
1632 GF/01 DCC debug and logging tidyup
1633 Error conditions log to paniclog rather than rejectlog.
1634 Debug lines prefixed by "DCC: " to remove any ambiguity.
1636 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1638 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1639 Bug spotted by Jeremy Harris; was flawed since initial commit.
1640 Would have resulted in OCSP responses post-SNI triggering an Exim
1641 NULL dereference and crash.
1643 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1645 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1646 Bug detection, analysis and fix by Samuel Thibault.
1647 Bugzilla 1331, Debian bug #698092.
1649 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1651 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1652 Server implementation by Todd Lyons, client by JH.
1653 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1654 config variable "prdr_enable" controls whether the server
1655 advertises the facility. If the client requests PRDR a new
1656 acl_data_smtp_prdr ACL is called once for each recipient, after
1657 the body content is received and before the acl_smtp_data ACL.
1658 The client is controlled by both of: a hosts_try_prdr option
1659 on the smtp transport, and the server advertisement.
1660 Default client logging of deliveries and rejections involving
1661 PRDR are flagged with the string "PRDR".
1663 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1664 fclose(). Diagnosis by Todd Lyons.
1666 PP/17 Update configure.default to handle IPv6 localhost better.
1667 Patch by Alain Williams (plus minor tweaks).
1670 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1671 This is now consistent with GnuTLS, and is now documented: the
1672 previous undocumented portable approach to treating the option as
1673 unset was to force an expansion failure. That still works, and
1674 an empty string is now equivalent.
1676 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1677 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1678 not performing validation itself.
1680 PP/20 Added force_command boolean option to pipe transport.
1681 Patch from Nick Koston, of cPanel Inc.
1683 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1686 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1688 PP/21 Fix eximon continuous updating with timestamped log-files.
1689 Broken in a format-string cleanup in 4.80, missed when I repaired the
1690 other false fix of the same issue.
1691 Report and fix from Heiko Schlichting.
1694 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1695 Report from Prashanth Katuri.
1697 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1698 It's SecureTransport, so affects any MacOS clients which use the
1699 system-integrated TLS libraries, including email clients.
1701 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1702 using a MIME ACL for non-SMTP local injection.
1703 Report and assistance in diagnosis by Warren Baker.
1705 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1707 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1709 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1710 last id that failed so it may be referenced in subsequent ACL's.
1712 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1715 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1716 ldap library initialization, allowing self-signed CA's to be
1717 used. Also properly sets require_cert option later in code by
1718 using NULL (global ldap config) instead of ldap handle (per
1719 session). Bug diagnosis and testing by alxgomz.
1721 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1722 the src/util/ subdirectory.
1724 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1725 renamed to Transport Post Delivery Action by Jeremy Harris, as
1728 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1729 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1730 redis_servers = needs to be configured which will be used by the redis
1731 lookup. Patch from Warren Baker, of The Packet Hub.
1733 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1735 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1736 hostname or reverse DNS when processing a host list. Used suggestions
1737 from multiple comments on this bug.
1739 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1741 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1742 Missed a few lines, added it to make the runtest require no keyboard
1745 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1746 contains upper case chars. Make router use caseful_local_part.
1748 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1749 support when GnuTLS has been built with p11-kit.
1755 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1757 This, or similar/improved, will also be change PP/11 of 4.82.
1763 PP/01 Handle short writes when writing local log-files.
1764 In practice, only affects FreeBSD (8 onwards).
1765 Bugzilla 1053, with thanks to Dmitry Isaikin.
1767 NM/01 Bugzilla 949 - Documentation tweak
1769 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1772 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1774 PP/02 Implemented gsasl authenticator.
1776 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1778 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1779 `pkg-config foo` for cflags/libs.
1781 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1782 with rest of GSASL and with heimdal_gssapi.
1784 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1785 `pkg-config foo` for cflags/libs for the TLS implementation.
1787 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1788 properties get this fed in as external SSF. A number of robustness
1789 and debugging improvements to the cyrus_sasl authenticator.
1791 PP/08 cyrus_sasl server now expands the server_realm option.
1793 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1794 Patch by Jeremy Harris.
1796 PP/10 Added dbmjz lookup type.
1798 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1800 PP/12 MAIL args handles TAB as well as SP, for better interop with
1801 non-compliant senders.
1802 Analysis and variant patch by Todd Lyons.
1804 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1805 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1806 Patch from Dirk Mueller <dmueller@suse.com>
1808 PP/13 tls_peerdn now print-escaped for spool files.
1809 Observed some $tls_peerdn in wild which contained \n, which resulted
1810 in spool file corruption.
1812 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1813 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1814 or write after TLS renegotiation, which otherwise led to messages
1817 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1818 as a tracking header (ie: a signed header comes before the signature).
1819 Patch from Wolfgang Breyha.
1821 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1822 comma-sep list; embedded commas doubled.
1824 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1826 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1828 Report and patch from Dmitry Banschikov.
1830 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1831 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1832 failures. We appear to now support TLS1.1+ with Exim.
1834 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1835 lets Exim select keys and certificates based upon TLS SNI from client.
1836 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1837 before an outbound SMTP session. New log_selector, +tls_sni.
1839 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1840 NULL dereference. Report and patch from Alun Jones.
1842 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1843 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1844 Not seeing resolver debug output on NetBSD, but suspect this is a
1845 resolver implementation change.
1847 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1848 Left warnings. Added "eximon gdb" invocation mode.
1850 PP/21 Defaulting "accept_8bitmime" to true, not false.
1852 PP/22 Added -bw for inetd wait mode support.
1854 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1855 locate the relevant includes and libraries. Made this the default.
1857 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1858 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1860 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1861 This may cause build issues on older platforms.
1863 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1864 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1865 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1866 Added SNI support via GnuTLS too.
1867 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1869 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1871 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1872 Applied second patch from Janne, implementing suggestion to default
1873 multiple-strings-in-record handling to match SPF spec.
1875 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1877 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1878 read-only, out of scope).
1879 Patch from Wolfgang Breyha, report from Stuart Northfield.
1881 PP/29 Fix three issues highlighted by clang analyser static analysis.
1882 Only crash-plausible issue would require the Cambridge-specific
1883 iplookup router and a misconfiguration.
1884 Report from Marcin Mirosław.
1886 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1888 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1889 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1890 As part of this, removing so much warning spew let me fix some minor
1891 real issues in debug logging.
1893 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1894 assignment on my part. Fixed.
1896 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1897 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1898 Janne Snabb (who went above and beyond: thank you).
1900 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1901 string otherwise requires a connection and a bunch more work and it's
1902 relatively easy to get wrong. Should also expose TLS library linkage
1905 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1906 64-bit ${eval} (JH/03).
1908 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1909 GNU libc to support some of the 64-bit stuff, should not lead to
1910 conflicts. Defined before os.h is pulled in, so if a given platform
1911 needs to override this, it can.
1913 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1914 protection layer was required, which is not implemented.
1915 Bugzilla 1254, patch from Wolfgang Breyha.
1917 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1918 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1919 tls_dhparam take prime identifiers. Also unbreak combination of
1920 OpenSSL+DH_params+TLSSNI.
1922 PP/39 Disable SSLv2 by default in OpenSSL support.
1928 PP/01 Solaris build fix for Oracle's LDAP libraries.
1929 Bugzilla 1109, patch from Stephen Usher.
1931 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1933 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1936 TF/02 Fix a couple more cases where we did not log the error message
1937 when unlink() failed. See also change 4.74-TF/03.
1939 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1940 lock up or crash if it happened to be inside a call to libc when it
1941 got a SIGUSR1 from exiwhat.
1943 The SIGUSR1 handler appends the current process status to the process
1944 log which is later printed by exiwhat. It used to use the general
1945 purpose logging code to do this, but several functions it calls are
1946 not safe for signals.
1948 The new output code in the SIGUSR1 handler is specific to the process
1949 log, and simple enough that it's easy to inspect for signal safety.
1950 Removing some special cases also simplifies the general logging code.
1951 Removing the spurious timestamps from the process log simplifies
1954 TF/04 Improved ratelimit ACL condition.
1956 The /noupdate option has been deprecated in favour of /readonly which
1957 has clearer semantics. The /leaky, /strict, and /readonly update modes
1958 are mutually exclusive. The update mode is no longer included in the
1959 database key; it just determines when the database is updated. (This
1960 means that when you upgrade Exim will forget old rate measurements.)
1962 Exim now checks that the per_* options are used with an update mode that
1963 makes sense for the current ACL. For example, when Exim is processing a
1964 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1965 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1966 must specify per_mail/readonly. If you omit the update mode it defaults to
1967 /leaky where that makes sense (as before) or /readonly where required.
1969 The /noupdate option is now undocumented but still supported for
1970 backwards compatibility. It is equivalent to /readonly except that in
1971 ACLs where /readonly is required you may specify /leaky/noupdate or
1972 /strict/noupdate which are treated the same as /readonly.
1974 A useful new feature is the /count= option. This is a generalization
1975 of the per_byte option, so that you can measure the throughput of other
1976 aggregate values. For example, the per_byte option is now equivalent
1977 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1979 The per_rcpt option has been generalized using the /count= mechanism
1980 (though it's more complicated than the per_byte equivalence). When it is
1981 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1982 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1983 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1984 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1985 Note that using per_rcpt with a non-readonly update mode in more than
1986 one ACL will cause the recipients to be double-counted. (The per_mail
1987 and per_byte options don't have this problem.)
1989 The handling of very low rates has changed slightly. If the computed rate
1990 is less than the event's count (usually one) then this event is the first
1991 after a long gap. In this case the rate is set to the same as this event's
1992 count, so that the first message of a spam run is counted properly.
1994 The major new feature is a mechanism for counting the rate of unique
1995 events. The new per_addr option counts the number of different
1996 recipients that someone has sent messages to in the last time period. It
1997 behaves like per_rcpt if all the recipient addresses are different, but
1998 duplicate recipient addresses do not increase the measured rate. Like
1999 the /count= option this is a general mechanism, so the per_addr option
2000 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2001 example, measure the rate that a client uses different sender addresses
2002 with the options per_mail/unique=$sender_address. There are further
2003 details in the main documentation.
2005 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2007 TF/06 Removed a few PCRE remnants.
2009 TF/07 Automatically extract Exim's version number from tags in the git
2010 repository when doing development or release builds.
2012 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2013 Bugzilla 879. Patch from Paul Fisher.
2015 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2016 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2019 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2021 PP/05 Variable $av_failed, true if the AV scanner deferred.
2022 Bugzilla 1078. Patch from John Horne.
2024 PP/06 Stop make process more reliably on build failure.
2025 Bugzilla 1087. Patch from Heiko Schlittermann.
2027 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2028 Bugzilla 1089. Patch from Heiko Schlittermann.
2030 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2031 Bugzilla 1131. Patch from Holger Weiß.
2033 PP/09 Handle IPv6 addresses with SPF.
2034 Bugzilla 860. Patch from Wolfgang Breyha.
2036 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2038 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2041 PP/11 match_* no longer expand right-hand-side by default.
2042 New compile-time build option, EXPAND_LISTMATCH_RHS.
2043 New expansion conditions, "inlist", "inlisti".
2045 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2047 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2049 PP/14 fix log_write() format string regression from TF/03.
2050 Bugzilla 1152. Patch from Dmitry Isaikin.
2056 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2058 PP/02 Harmonised TLS library version reporting; only show if debugging.
2059 Layout now matches that introduced for other libraries in 4.74 PP/03.
2061 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2063 PP/04 New "dns_use_edns0" global option.
2065 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2068 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2069 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2071 TK/01 Updated PolarSSL code to 0.14.2.
2072 Bugzilla 1097. Patch from Andreas Metzler.
2074 PP/07 Catch divide-by-zero in ${eval:...}.
2075 Fixes bugzilla 1102.
2077 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2080 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2081 format-string attack -- SECURITY: remote arbitrary code execution.
2083 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2084 time unintentionally subject to list matching rules, letting the header
2085 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2086 arbitrary string expansion). This allowed for information disclosure.
2088 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2089 INT_MIN/-1 -- value coerced to INT_MAX.
2095 NM/01 Workaround for PCRE version dependency in version reporting
2098 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2099 This fixes portability to compilers other than gcc, notably
2100 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2102 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2103 makefiles for portability to HP-UX and POSIX correctness.
2105 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2106 Also via indented variable definition in the Makefile.
2107 (Debugging by Oliver Heesakkers).
2109 PP/02 Restore caching of spamd results with expanded spamd_address.
2110 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2112 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2113 Improves build reliability. Fix from: Frank Elsner
2115 NM/02 Fix wide character breakage in the rfc2047 coding
2116 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2118 NM/03 Allow underscore in dnslist lookups
2119 Fixes bug 1026. Patch from Graeme Fowler
2121 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2122 Code patches from Adam Ciarcinski of NetBSD.
2124 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2127 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2128 is logged, to avoid truncation. Patch from John Horne.
2130 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2131 Patch from Jakob Hirsch.
2133 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2134 SQL string expansion failure details.
2135 Patch from Andrey Oktyabrski.
2137 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2138 Patch from Simon Arlott.
2140 PP/09 New lookups functionality failed to compile on old gcc which rejects
2141 extern declarations in function scope.
2142 Patch from Oliver Fleischmann
2144 PP/10 Use sig_atomic_t for flags set from signal handlers.
2145 Check getgroups() return and improve debugging.
2146 Fixed developed for diagnosis in bug 927 (which turned out to be
2149 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2150 Patch from Mark Zealey.
2152 PP/12 Bugzilla 1056: Improved spamd server selection.
2153 Patch from Mark Zealey.
2155 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2156 Based on patch from Heiko Schlittermann.
2158 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2159 Patch from Uwe Doering, sign-off by Michael Haardt.
2161 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2162 variable declaration deep within a block. Bug and patch from
2165 PP/15 lookups-Makefile IRIX compatibility coercion.
2167 PP/16 Make DISABLE_DKIM build knob functional.
2169 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2170 Patch by Simon Arlott
2172 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2173 variable argument macros. Our copy now differs from upstream.
2179 TF/01 Failure to get a lock on a hints database can have serious
2180 consequences so log it to the panic log.
2182 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2183 controlled using the smtp_confirmation log selector.
2185 TF/03 Include the error message when we fail to unlink a spool file.
2187 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2188 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2189 for maintaining out-of-tree patches for some time.
2191 PP/01 Bugzilla 139: Documentation and portability issues.
2192 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2193 Handle per-OS dynamic-module compilation flags.
2195 PP/02 Let /dev/null have normal permissions.
2196 The 4.73 fixes were a little too stringent and complained about the
2197 permissions on /dev/null. Exempt it from some checks.
2198 Reported by Andreas M. Kirchwitz.
2200 PP/03 Report version information for many libraries, including
2201 Exim version information for dynamically loaded libraries. Created
2202 version.h, now support a version extension string for distributors
2203 who patch heavily. Dynamic module ABI change.
2205 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2206 privilege escalation vulnerability whereby the Exim run-time user
2207 can cause root to append content of the attacker's choosing to
2210 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2213 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2214 If dropping privileges for untrusted macros, we disabled normal logging
2215 on the basis that it would fail; for the Exim run-time user, this is not
2216 the case, and it resulted in successful deliveries going unlogged.
2217 Fixed. Reported by Andreas Metzler.
2223 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2224 only prepend for the Resent-* case. Fixes regression introduced in
2225 Exim 4.70 by NM/22 for Bugzilla 607.
2227 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2228 increasing numbers of administrators be bitten by this.
2230 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2232 PP/03 Bugzilla 994: added openssl_options main configuration option.
2234 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2236 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2238 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2240 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2241 without a peer certificate, leading to a segfault because of an
2242 assumption that peers always have certificates. Be a little more
2243 paranoid. Problem reported by Martin Tscholak.
2245 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2246 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2247 NB: ClamAV planning to remove STREAM in "middle of 2010".
2248 CL also introduces -bmalware, various -d+acl logging additions and
2249 more caution in buffer sizes.
2251 PP/09 Implemented reverse_ip expansion operator.
2253 PP/10 Bugzilla 937: provide a "debug" ACL control.
2255 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2257 PP/12 Bugzilla 973: Implement --version.
2259 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2261 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2263 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2265 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2266 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2267 ignore trailing whitespace.
2269 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2271 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2274 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2275 Notification from Dr Andrew Aitchison.
2277 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2278 ExtendedDetectionInfo response format.
2279 Notification from John Horne.
2281 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2284 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2285 XSL and documented dependency on system catalogs, with examples of how
2288 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2291 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2292 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2293 configuration file which is writeable by the Exim user or group.
2295 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2296 of configuration files to cover files specified with the -C option if
2297 they are going to be used with root privileges, not just the default
2300 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2301 option (effectively making it always true).
2303 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2304 files to be used while preserving root privileges.
2306 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2307 that rogue child processes cannot use them.
2309 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2310 run-time user, instead of root.
2312 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2313 Exim run-time user without dropping privileges.
2315 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2316 result string, instead of calling string_vformat() twice with the same
2319 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2320 for other users. Others should always drop root privileges if they use
2321 -C on the command line, even for a whitelisted configure file.
2323 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2325 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2331 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2332 $data_path, and $header_path variables; fixed documentation bugs and
2335 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2336 exipick to access non-standard spools, including the "frozen" queue
2339 NM/01 Bugzilla 965: Support mysql stored procedures.
2340 Patch from Alain Williams
2342 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2344 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2345 Patch from Andreas Metzler
2347 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2348 Patch from Kirill Miazine
2350 NM/05 Bugzilla 671: Added umask to procmail example.
2352 JJ/03 installed exipick 20100323.0, fixing doc bug
2354 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2355 directory. Notification and patch from Dan Rosenberg.
2357 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2359 TK/02 Improve log output when DKIM signing operation fails.
2361 MH/01 Treat the transport option dkim_domain as a colon separated
2362 list, not as a single string, and sign the message with each element,
2363 omitting multiple occurences of the same signer.
2365 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2366 Bugzilla 985, 986. Patch by Simon Arlott
2368 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2369 Patch by Simon Arlott
2371 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2372 MBX locking. Notification from Dan Rosenberg.
2378 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2380 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2382 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2384 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2386 NM/04 Bugzilla 915: Flag broken perl installation during build.
2392 TK/01 Added patch by Johannes Berg that expands the main option
2393 "spamd_address" if it starts with a dollar sign.
2395 TK/02 Write list of recipients to X-Envelope-Sender header when building
2396 the mbox-format spool file for content scanning (suggested by Jakob
2399 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2400 (http://www.dcc-servers.net/) support via dccifd. Activated by
2401 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2403 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2404 by Mark Daniel Reidel <mr@df.eu>.
2406 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2407 When building exim an external PCRE library is now needed -
2408 PCRE is a system library on the majority of modern systems.
2409 See entry on PCRE_LIBS in EDITME file.
2411 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2412 conversation. Added nologin parameter to request.
2413 Patch contributed by Kirill Miazine.
2415 TF/01 Do not log submission mode rewrites if they do not change the address.
2417 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2419 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2420 log files in place. Contributed by Roberto Lima.
2422 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2424 TF/03 Bugzilla 615: When checking the local_parts router precondition
2425 after a local_part_suffix or local_part_prefix option, Exim now
2426 does not use the address's named list lookup cache, since this
2427 contains cached lookups for the whole local part.
2429 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2430 Robert Millan. Documentation is in experimental-spec.txt.
2432 TF/04 Bugzilla 668: Fix parallel build (make -j).
2434 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2436 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2437 Patch provided by Jan Srzednicki.
2439 TF/05 Leading white space used to be stripped from $spam_report which
2440 wrecked the formatting. Now it is preserved.
2442 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2443 that they are available at delivery time.
2445 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2447 TF/08 TLS error reporting now respects the incoming_interface and
2448 incoming_port log selectors.
2450 TF/09 Produce a more useful error message if an SMTP transport's hosts
2451 setting expands to an empty string.
2453 NM/06 Bugzilla 744: EXPN did not work under TLS.
2454 Patch provided by Phil Pennock.
2456 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2457 Patch provided by Richard Godbee.
2459 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2460 acl_smtp_notquit, added index entry.
2462 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2463 Patch provided by Eugene Bujak.
2465 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2466 accept(). Patch provided by Maxim Dounin.
2468 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2469 Patch provided by Phil Pennock.
2471 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2473 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2474 Patch provided by Brad "anomie" Jorsch.
2476 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2477 Patch provided by Dean Brooks.
2479 TK/05 Add native DKIM support (does not depend on external libraries).
2481 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2482 Patch provided by Graeme Fowler.
2484 NM/16 Bugzilla 851: Documentation example syntax fix.
2486 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2488 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2491 NM/19 Bugzilla 745: TLS version reporting.
2492 Patch provided by Phil Pennock.
2494 NM/20 Bugzilla 167: bool: condition support.
2495 Patch provided by Phil Pennock.
2497 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2498 clients. Patch provided by Phil Pennock.
2500 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2501 Patch provided by Brad "anomie" Jorsch.
2503 NM/23 Bugzilla 687: Fix misparses in eximstats.
2504 Patch provided by Heiko Schlittermann.
2506 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2507 Patch provided by Heiko Schlittermann.
2509 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2510 plus update to original patch.
2512 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2514 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2515 Patch provided by David Brownlee.
2517 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2519 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2521 NM/30 Bugzilla 888: TLS documentation bugfixes.
2523 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2525 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2526 Unlike the original bugzilla I have changed all shell scripts in src tree.
2528 NM/33 Bugzilla 898: Transport filter timeout fix.
2529 Patch by Todd Rinaldo.
2531 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2532 Patch by Serge Demonchaux.
2534 NM/35 Bugzilla 39: Base64 decode bug fixes.
2535 Patch by Jakob Hirsch.
2537 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2539 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2541 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2543 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2549 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2550 ALT-N's libdkim that I have put here:
2551 http://duncanthrax.net/exim-experimental/
2553 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2554 were called 'true' and it seems that C99 defines that as a reserved
2555 keyword to be used with 'bool' variable types. That means you could
2556 not include C99-style headers which use bools without triggering
2557 build errors in sieve.c.
2559 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2560 as mailq or other aliases. Changed the --help handling significantly
2561 to do whats expected. exim_usage() emits usage/help information.
2563 SC/01 Added the -bylocaldomain option to eximstats.
2565 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2567 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2569 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2575 PH/01 Another patch from the Sieve maintainer.
2577 PH/02 When an IPv6 address is converted to a string for single-key lookup
2578 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2579 dots are used instead of colons so that keys in lsearch files need not
2580 contain colons. This was done some time before quoting was made available
2581 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2582 (notated using the quote facility) so as to distinguish them from IPv4
2583 keys. This meant that lookups for IP addresses in host lists did not work
2584 for iplsearch lookups.
2586 This has been fixed by arranging for IPv6 addresses to be expressed with
2587 colons if the lookup type is iplsearch. This is not incompatible, because
2588 previously such lookups could never work.
2590 The situation is now rather anomalous, since one *can* have colons in
2591 ordinary lsearch keys. However, making the change in all cases is
2592 incompatible and would probably break a number of configurations.
2594 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2597 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2598 conversion specification without a maximum field width, thereby enabling
2599 a rogue spamd server to cause a buffer overflow. While nobody in their
2600 right mind would setup Exim to query an untrusted spamd server, an
2601 attacker that gains access to a server running spamd could potentially
2602 exploit this vulnerability to run arbitrary code as the Exim user.
2604 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2605 $primary_hostname instead of what libspf2 thinks the hosts name is.
2607 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2608 a directory entry by the name of the lookup key. Previously, if a
2609 symlink pointed to a non-existing file or a file in a directory that
2610 Exim lacked permissions to read, a lookup for a key matching that
2611 symlink would fail. Now it is enough that a matching directory entry
2612 exists, symlink or not. (Bugzilla 503.)
2614 PH/03 The body_linecount and body_zerocount variables are now exported in the
2617 PH/04 Added the $dnslist_matched variable.
2619 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2620 This means they are set thereafter only if the connection becomes
2623 PH/06 Added the client_condition to authenticators so that some can be skipped
2624 by clients under certain conditions.
2626 PH/07 The error message for a badly-placed control=no_multiline_responses left
2627 "_responses" off the end of the name.
2629 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2631 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2632 (without spaces) instead of just copying the configuration text.
2634 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2636 PH/11 Added $max_received_linelength.
2638 PH/12 Added +ignore_defer and +include_defer to host lists.
2640 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2641 way in which PCRE > 7.0 is built.
2643 PH/14 Implemented queue_only_load_latch.
2645 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2646 MAIL command. The effect was to mangle the value on 64-bit systems.
2648 PH/16 Another patch from the Sieve maintainer.
2650 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2652 PH/18 If a system quota error occurred while trying to create the file for
2653 a maildir delivery, the message "Mailbox is full" was not appended to the
2654 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2655 only to a quota excession during the actual writing of the file.
2657 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2658 characters?) which causes problems in log lines. The DN values are now
2659 passed through string_printing() before being added to log lines.
2661 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2662 and InterBase are left for another time.)
2664 PH/21 Added message_body_newlines option.
2666 PH/22 Guard against possible overflow in moan_check_errorcopy().
2668 PH/23 POSIX allows open() to be a macro; guard against that.
2670 PH/24 If the recipient of an error message contained an @ in the local part
2671 (suitably quoted, of course), incorrect values were put in $domain and
2672 $local_part during the evaluation of errors_copy.
2678 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2679 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2682 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2683 issue a MAIL command.
2685 PH/02 In an ACL statement such as
2687 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2689 if a client was not listed at all, or was listed with a value other than
2690 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2691 the condition was not true (as it should be), so access was not denied.
2692 The bug was that the ! inversion was incorrectly passed on to the second
2693 item. This has been fixed.
2695 PH/03 Added additional dnslists conditions == and =& which are different from
2696 = and & when the dns lookup returns more than one IP address.
2698 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2699 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2701 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2702 FSYNC, which compiles an option called disable_fsync that allows for
2703 bypassing fsync(). The documentation is heavily laced with warnings.
2705 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2707 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2708 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2709 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2710 including adding "make clean"; (3) Added -fPIC when compiling the test
2711 dynamically loaded module, to get rid of a warning.
2713 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2714 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2715 = 0s. The bug is otherwise harmless.
2717 PH/07 There was a bug in the dovecot authenticator such that the value of
2718 $auth1 could be overwritten, and so not correctly preserved, after a
2719 successful authentication. This usually meant that the value preserved by
2720 the server_setid option was incorrect.
2722 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2724 PH/09 Installed PCRE release 7.0.
2726 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2727 run for batched SMTP input. It is now run at the start of every message
2728 in the batch. While fixing this I discovered that the process information
2729 (output by running exiwhat) was not always getting set for -bs and -bS
2730 input. This is fixed, and it now also says "batched" for BSMTP.
2732 PH/11 Added control=no_pipelining.
2734 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2735 patch, slightly modified), and move the expansion of helo_data till after
2736 the connection is made in the smtp transport (so it can use these
2739 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2741 PH/14 Added log_selector = +pid.
2743 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2745 PH/16 Add ${if forany and ${if forall.
2747 PH/17 Added dsn_from option to vary the From: line in DSNs.
2749 PH/18 Flush SMTP output before performing a callout, unless control =
2750 no_callout_flush is set.
2752 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2753 was true (the default) a successful delivery failed to delete the retry
2754 item, thus causing premature timeout of the address. The bug is now
2757 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2759 PH/21 Long custom messages for fakedefer and fakereject are now split up
2760 into multiline responses in the same way that messages for "deny" and
2761 other ACL rejections are.
2763 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2764 with slight modification.
2766 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2767 draft, changing the syntax and factoring some duplicate code".
2769 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2770 for deliveries of the second and subsequent messages over the same SMTP
2773 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2774 ${reduce, with only minor "tidies".
2776 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2778 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2779 expansion side effects.
2781 PH/27 When a message times out after an over-quota error from an Exim-imposed
2782 quota, the bounce message says "mailbox is full". This message was not
2783 being given when it was a system quota that was exceeded. It now should
2786 MH/03 Made $recipients available in local_scan(). local_scan() already has
2787 better access to the recipient list through recipients_list[], but
2788 $recipients can be useful in postmaster-provided expansion strings.
2790 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2791 in the case of a MAIL command with additional options following the
2792 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2793 were accidentally chopped off.
2795 PH/29 SMTP synchronization checks are implemented when a command is read -
2796 there is a check that no more input is waiting when there shouldn't be
2797 any. However, for some commands, a delay in an ACL can mean that it is
2798 some time before the response is written. In this time, more input might
2799 arrive, invalidly. So now there are extra checks after an ACL has run for
2800 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2801 pipelining has not been advertised.
2803 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2805 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2806 returned in the SMTP response when smtp_return_error_details was false.
2807 This has been fixed.
2809 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2810 instead of the C I/O that was originally supplied, because problems were
2811 reported on Solaris.
2813 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2814 Exim which did not show up earlier: it was assuming that a call to
2815 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2816 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2817 was a macro that became an assignment, so it seemed to work. This has
2818 changed to a proper function call with a void return, hence the compile
2819 error. Exim's code has been fixed.
2821 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2824 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2826 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2828 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2829 because it turns out to be too big or there is a timeout) there is no
2830 "Completed" line in the log. When some messages of this type were
2831 selected by exigrep, they were listed as "not completed". Others were
2832 picked up by some special patterns. I have improved the selection
2833 criteria to be more general.
2835 PH/38 The host_find_failed option in the manualroute router can now be set
2836 to "ignore", to completely ignore a host whose IP address cannot be
2837 found. If all hosts are ignored, the behaviour is controlled by the new
2838 host_all_ignored option.
2840 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2841 homing or because of multiple MX records with /mx) generated more than
2842 one IP address, and the following item turned out to be the local host,
2843 all the secondary addresses of the first item were incorrectly removed
2844 from the list, along with the local host and any following hosts (which
2845 is what is supposed to happen).
2847 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2848 whoever called Exim into the -H file. In the case of the daemon it was
2849 behaving confusingly. When first started, it used values for whoever
2850 started the daemon, but after a SIGHUP it used the Exim user (because it
2851 calls itself on a restart). I have changed the code so that it now always
2854 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2855 message are rejected with the same error (e.g. no authentication or bad
2856 sender address), and a DATA command is nevertheless sent (as can happen
2857 with PIPELINING or a stupid MUA), the error message that was given to the
2858 RCPT commands is included in the rejection of the DATA command. This is
2859 intended to be helpful for MUAs that show only the final error to their
2862 PH/42 Another patch from the Sieve maintainer.
2864 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2865 Eximstats - Fixed some broken HTML links and added missing column headers
2867 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2868 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2870 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2872 PH/43 Yet another patch from the Sieve maintainer.
2874 PH/44 I found a way to check for a TCP/IP connection going away before sending
2875 the response to the final '.' that terminates a message, but only in the
2876 case where the client has not sent further data following the '.'
2877 (unfortunately, this is allowed). However, in many cases there won't be
2878 any further data because there won't be any more messages to send. A call
2879 to select() can be used: if it shows that the input is "ready", there is
2880 either input waiting, or the socket has been closed. An attempt to read
2881 the next input character can distinguish the two cases. Previously, Exim
2882 would have sent an OK response which the client would never have see.
2883 This could lead to message repetition. This fix should cure that, at
2884 least in a lot of common cases.
2886 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2887 advertised in response to EHLO.
2893 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2894 fixed by 4.65/MH/01 (is this a record?) are fixed:
2896 (i) An empty string was always treated as zero by the numeric comparison
2897 operators. This behaviour has been restored.
2899 (ii) It is documented that the numeric comparison operators always treat
2900 their arguments as decimal numbers. This was broken in that numbers
2901 starting with 0 were being interpreted as octal.
2903 While fixing these problems I realized that there was another issue that
2904 hadn't been noticed. Values of message_size_limit (both the global option
2905 and the transport option) were treated as octal if they started with 0.
2906 The documentation was vague. These values are now always treated as
2907 decimal, and I will make that clear in the documentation.
2913 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2914 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2917 MH/01 Don't check that the operands of numeric comparison operators are
2918 integers when their expansion is in "skipping" mode (fixes bug
2919 introduced by 4.64-PH/07).
2921 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2922 child addresses, Exim now panics and dies. Previously, because the count
2923 is held in a short int, deliveries were likely to be lost. As such a
2924 large number of recipients for a single message is ridiculous
2925 (performance will be very, very poor), I have chosen to impose a limit
2926 rather than extend the field.
2932 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2933 leftover -K file (the existence of which was triggered by #402).
2934 While we were at it, introduced process PID as part of the -K
2935 filename. This should rule out race conditions when creating
2938 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2939 processing considerably. Previous code took too long for large mails,
2940 triggering a timeout which in turn triggers #401.
2942 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2943 in the DK code in transports.c. sendfile() is not really portable,
2944 hence the _LINUX specificness.
2946 TF/01 In the add_headers option to the mail command in an Exim filter,
2947 there was a bug that Exim would claim a syntax error in any
2948 header after the first one which had an odd number of characters
2951 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2952 callout verification, Exim cached a "reject" for the entire domain. This
2953 is correct for most verifications, but it is not correct for a recipient
2954 verification with use_sender or use_postmaster set, because in that case
2955 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2956 case of MAIL FROM:<> rejection from other early rejections (e.g.
2957 rejection of HELO). When verifying a recipient using a non-null MAIL
2958 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2959 Whatever the result of the callout, the value of the domain cache is
2960 left unchanged (for any other kind of callout, getting as far as trying
2961 RCPT means that the domain itself is ok).
2963 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2966 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2967 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2968 session, the daemon ignores ECONNECT errors and logs others; it now
2969 ignores EPIPE as well.
2971 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2972 (quoted-printable decoding).
2974 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2975 later the small subsequent patch to fix an introduced bug.
2977 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2979 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2981 PH/08 An error is now given if message_size_limit is specified negative.
2983 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2984 to be given (somewhat) arbitrary names.
2986 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2989 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2990 miscellaneous code fixes
2992 PH/10 Added the log_reject_target ACL modifier to specify where to log
2995 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2996 hostname. This is wrong, because it relates to the incoming message (and
2997 probably the interface on which it is arriving) and not to the outgoing
2998 callout (which could be using a different interface). This has been
2999 changed to use the value of the helo_data option from the smtp transport
3000 instead - this is what is used when a message is actually being sent. If
3001 there is no remote transport (possible with a router that sets up host
3002 addresses), $smtp_active_hostname is used.
3004 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3005 tweaks were necessary in order to get it to work (see also 21 below):
3006 (a) The code assumed that strncpy() returns a negative number on buffer
3007 overflow, which isn't the case. Replaced with Exim's string_format()
3009 (b) There were several signed/unsigned issues. I just did the minimum
3010 hacking in of casts. There is scope for a larger refactoring.
3011 (c) The code used strcasecmp() which is not a standard C function.
3012 Replaced with Exim's strcmpic() function.
3013 (d) The code set only $1; it now sets $auth1 as well.
3014 (e) A simple test gave the error "authentication client didn't specify
3015 service in request". It would seem that Dovecot has changed its
3016 interface. Fortunately there's a specification; I followed it and
3017 changed what the client sends and it appears to be working now.
3019 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3022 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3023 address A is aliased to B and C, where B exists and C does not. Without
3024 -v the output is "A verified" because verification stops after a
3025 successful redirection if more than one address is generated. However,
3026 with -v the child addresses are also verified. Exim was outputting "A
3027 failed to verify" and then showing the successful verification for C,
3028 with its parentage. It now outputs "B failed to verify", showing B's
3029 parentage before showing the successful verification of C.
3031 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3032 look up a TXT record in a specific list after matching in a combined
3035 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3036 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3037 they consult the DNS. I had assumed they would set it the way they
3038 wanted; and indeed my experiments on Linux seem to show that in some
3039 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3040 To be on the safe side, however, I have now made the interface to
3041 host_find_byname() similar to host_find_bydns(), with an argument
3042 containing the DNS resolver options. The host_find_byname() function now
3043 sets these options at its start, just as host_find_bydns() does. The smtp
3044 transport options dns_qualify_single and dns_search_parents are passed to
3045 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3046 of host_find_byname() use the default settings of RES_DEFNAMES
3047 (qualify_single) but not RES_DNSRCH (search_parents).
3049 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3050 spool_read_header() do less string testing, by means of a preliminary
3051 switch on the second character of optional "-foo" lines. (This is
3052 overdue, caused by the large number of possibilities that now exist.
3053 Originally there were few.) While I was there, I also converted the
3054 str(n)cmp tests so they don't re-test the leading "-" and the first
3055 character, in the hope this might squeeze out yet more improvement.
3057 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3058 flag allowing group syntax was set by the header_syntax check but not
3059 turned off, possible causing trouble later; (2) The flag was not being
3060 set at all for the header_verify test, causing "group"-style headers to
3061 be rejected. I have now set it in this case, and also caused header_
3062 verify to ignore an empty address taken from a group. While doing this, I
3063 came across some other cases where the code for allowing group syntax
3064 while scanning a header line wasn't quite right (mostly, not resetting
3065 the flag correctly in the right place). These bugs could have caused
3066 trouble for malformed header lines. I hope it is now all correct.
3068 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3069 with the "reply" argument non-NULL. The code, however (which originally
3070 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3071 but it didn't always do it. This confused somebody who was copying the
3072 code for some other use. I have removed all the tests.
3074 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3075 feature that was used to support insecure browsers during the U.S. crypto
3076 embargo. It requires special client support, and Exim is probably the
3077 only MTA that supported it -- and would never use it because real RSA is
3078 always available. This code has been removed, because it had the bad
3079 effect of slowing Exim down by computing (never used) parameters for the
3080 RSA_EXPORT functionality.
3082 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3083 authenticator to fail if there's a tab character in the incoming data
3084 (there should never be unless someone is messing about, as it's supposed
3085 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3086 if the connection is using TLS or if the remote IP is the same as the
3087 local IP, and the "valid-client-cert option" if a client certificate has
3090 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3091 authenticators. This can be used for authorization after authentication
3092 succeeds. (In the case of plaintext, it servers for both authentication
3095 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3096 if any retry times were supplied.
3098 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3099 connection, where there is no client IP address to check. In this
3100 situation, the verify now always succeeds.
3102 PH/25 Applied John Jetmore's -Mset patch.
3104 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3106 PH/27 In a string expansion for a processed (not raw) header when multiple
3107 headers of the same name were present, leading whitespace was being
3108 removed from all of them, but trailing whitespace was being removed only
3109 from the last one. Now trailing whitespace is removed from each header
3110 before concatenation. Completely empty headers in a concatenation (as
3111 before) are ignored.
3113 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3114 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3116 PH/29 [Removed. This was a change that I later backed out, and forgot to
3117 correct the ChangeLog entry (that I had efficiently created) before
3118 committing the later change.]
3120 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3121 address errors (4xx response to RCPT) over the same connection as other
3122 messages routed to the same hosts. Such deliveries are always "forced",
3123 so retry times are not inspected. This resulted in far too many retries
3124 for the affected addresses. The effect occurred only when there were more
3125 hosts than the hosts_max_try setting in the smtp transport when it had
3126 the 4xx errors. Those hosts that it had tried were not added to the list
3127 of hosts for which the message was waiting, so if all were tried, there
3128 was no problem. Two fixes have been applied:
3130 (i) If there are any address or message errors in an SMTP delivery, none
3131 of the hosts (tried or untried) are now added to the list of hosts
3132 for which the message is waiting, so the message should not be a
3133 candidate for sending over the same connection that was used for a
3134 successful delivery of some other message. This seems entirely
3135 reasonable: after all the message is NOT "waiting for some host".
3136 This is so "obvious" that I'm not sure why it wasn't done
3137 previously. Hope I haven't missed anything, but it can't do any
3138 harm, as the worst effect is to miss an optimization.
3140 (ii) If, despite (i), such a delivery is accidentally attempted, the
3141 routing retry time is respected, so at least it doesn't keep
3142 hammering the server.
3144 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3145 in ${readsocket because some servers need this prod.
3147 PH/32 Added some extra debug output when updating a wait-xxx database.
3149 PH/33 The hint "could be header name not terminated by colon", which has been
3150 given for certain expansion errors for a long time, was not being given
3151 for the ${if def:h_colon_omitted{... case.
3153 PH/34 The spec says: "With one important exception, whenever a domain list is
3154 being scanned, $domain contains the subject domain." There was at least
3155 one case where this was not true.
3157 PH/35 The error "getsockname() failed: connection reset by peer" was being
3158 written to the panic log as well as the main log, but it isn't really
3159 panic-worthy as it just means the connection died rather early on. I have
3160 removed the panic log writing for the ECONNRESET error when getsockname()
3163 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3164 runs only) independently of the message's sender address. This meant
3165 that, if the 4xx error was in fact related to the sender, a different
3166 message to the same recipient with a different sender could confuse
3167 things. In particular, this can happen when sending to a greylisting
3168 server, but other circumstances could also provoke similar problems.
3169 I have changed the default so that the retry time for these errors is now
3170 based a combination of the sender and recipient addresses. This change
3171 can be overridden by setting address_retry_include_sender=false in the
3174 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3175 remote server are returned as part of bounce messages. This was not
3176 happening for LMTP over a pipe (the lmtp transport), but now it is the
3177 same for both kinds of LMTP.
3179 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3180 in header lines that were in fact CNAMEs. This is no longer the case.
3182 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3183 and queue runs started by the daemon processed all messages. This has
3184 been fixed so that -R and -S can now usefully be given with -q<time>.
3186 PH/40 Import PCRE release 6.7 (fixes some bugs).
3188 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3190 PH/42 Give an error if -q is specified more than once.
3192 PH/43 Renamed the variables $interface_address and $interface_port as
3193 $received_ip_address and $received_port, to make it clear that these
3194 values apply to message reception, and not to the outgoing interface when
3195 a message is delivered. (The old names remain recognized, of course.)
3197 PH/44 There was no timeout on the connect() call when using a Unix domain
3198 socket in the ${readsocket expansion. There now is.
3200 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3201 be meaningful with "accept".
3203 SC/01 Eximstats V1.43
3204 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3206 SC/02 Eximstats V1.44
3207 Use a glob alias rather than an array ref in the generated
3208 parser. This improves both readability and performance.
3210 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3211 Collect SpamAssassin and rejection statistics.
3212 Don't display local sender or destination tables unless
3213 there is data to show.
3214 Added average volumes into the top table text output.
3216 SC/04 Eximstats V1.46
3217 Collect data on the number of addresses (recipients)
3218 as well as the number of messages.
3220 SC/05 Eximstats V1.47
3221 Added 'Message too big' to the list of mail rejection
3222 reasons (thanks to Marco Gaiarin).
3224 SC/06 Eximstats V1.48
3225 Mainlog lines which have GMT offsets and are too short to
3226 have a flag are now skipped.
3228 SC/07 Eximstats V1.49 (Alain Williams)
3229 Added the -emptyok flag.
3231 SC/08 Eximstats V1.50
3232 Fixes for obtaining the IP address from reject messages.
3234 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3235 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3236 whitespace changes from 4.64-PH/27
3238 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3241 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3242 are found, allow negative numbers in numeric criteria)
3244 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3246 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3247 to match changes made in 4.64-PH/43
3249 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3251 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3252 "domain" is actually an IP address, and force a failure. This locks out
3253 those revolvers/nameservers that support "A-for-A" lookups, in
3254 contravention of the specifications.
3256 PH/48 When a host name was looked up from an IP address, and the subsequent
3257 forward lookup of the name timed out, the host name was left in
3258 $sender_host_name, contrary to the specification.
3260 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3261 restricted to single-key lookups, Exim was not diagnosing an error if
3262 * or *@ was used with a query-style lookup.
3264 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3266 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3267 long ago, but noone interested enough thought of it. Let's just say that
3268 the "1.1" means that there are some new functions that weren't there at
3269 some point in the past.
3271 PH/51 Error processing for expansion failure of helo_data from an smtp
3272 transport during callout processing was broken.
3274 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3275 tested/used via the -bh/-bhc/-bs options.
3277 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3278 bug, fixed in subsequent PCRE releases).
3280 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3281 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3283 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3289 SC/01 Use a glob alias rather than an array ref in eximstats generated
3290 parser. This improves both readability and performance.
3292 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3293 Don't display local sender or destination tables in eximstats unless
3294 there is data to show.
3295 Added average volumes into the eximstats top table text output.
3297 SC/03 Collect data on the number of addresses (recipients) as well
3298 as the number of messages in eximstats.
3300 TF/01 Correct an error in the documentation for the redirect router. Exim
3301 does (usually) call initgroups() when daemonizing.
3303 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3304 with consistent privilege compared to when running as a daemon.
3306 TF/03 Note in the spec that $authenticated_id is not set for local
3307 submissions from trusted users.
3309 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3310 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3312 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3313 by adding some example configuration directives to the default
3314 configuration file. A little bit of work is required to uncomment the
3315 directives and define how usernames and passwords are checked, but
3316 there is now a framework to start from.
3318 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3319 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3320 without this. I don't know how relevant this is to other LDAP libraries.
3322 PH/02 Add the verb name to the "unknown ACL verb" error.
3324 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3326 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3328 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3329 directory not expanded when it should be if an expanded home directory
3330 was set for the address (which is overridden by the transport).
3332 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3335 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3336 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3337 because it is too late at that time, and has no effect.
3339 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3340 security issue with \' (bugzilla #107). I could not use the
3341 PQescapeStringConn() function, because it needs a PGconn value as one of
3344 PH/08 When testing addresses using -bt, indicate those final addresses that
3345 are duplicates that would not cause an additional delivery. At least one
3346 person was confused, thinking that -bt output corresponded to deliveries.
3347 (Suppressing duplicates isn't a good idea as you lose the information
3348 about possibly different redirections that led to the duplicates.)
3350 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3351 systems where poll() doesn't work, in particular OS X.
3353 PH/10 Added more information to debugging output for retry time not reached.
3355 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3356 operations in malware.c.
3358 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3361 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3362 syslog_duplication set false, log lines that would normally be written
3363 both the the main log and to the reject log were not written to syslog at
3366 PH/14 In the default configuration, change the use of "message" in ACL warn
3367 statements to "add_header".
3369 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3370 not followed by a command (e.g. "seen endif").
3372 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3373 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3376 PH/17 Added extra conditions to the default value of delay_warning_condition
3380 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3381 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3382 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3385 The Auto-Submitted: and various List- headers are standardised, whereas I
3386 don't think Precedence: ever was.
3388 PH/18 Refactored debugging code in route_finduser() to show more information,
3389 in particular, the error code if getpwnam() issues one.
3391 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3392 This is apparently needed in addition to the PH/07 change above to avoid
3393 any possible encoding problems.
3395 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3396 but not after initializing Perl.
3398 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3399 output them only if debugging. By default they are written stderr,
3400 apparently, which is not desirable.
3402 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3405 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3408 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3410 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3411 authenticated or an ident call has been made. Suppress the default
3412 values for $authenticated_id and $authenticated_sender (but permit -oMai
3413 and -oMas) when testing with -bh.
3415 PH/24 Re-jigged the order of the tests in the default configuration so that the
3416 tests for valid domains and recipients precede the DNS black list and CSA
3417 tests, on the grounds that those ones are more expensive.
3419 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3420 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3421 This bug exists in every version of Exim that I still have, right back to
3424 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3425 However, an attempt to turn on case-sensitivity in a regex key by
3426 including (?-i) didn't work because the subject string was already
3427 lowercased, and the effects were non-intuitive. It turns out that a
3428 one-line patch can be used to allow (?-i) to work as expected.
3434 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3435 other effects) broke the use of negated acl sub-conditions.
3437 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3440 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3441 "Deny" causes Exim to reject the incoming connection with a 554 error.
3442 Unfortunately, if there is a major crisis, such as a disk failure,
3443 tcp-wrappers gives "deny", whereas what one would like would be some
3444 kind of temporary error. A kludge has been added to help with this.
3445 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3446 554 error is used if errno is still zero or contains ENOENT (which occurs
3447 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3450 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3452 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3453 errors. Otherwise a message that provokes a temporary error (when other
3454 messages do not) can cause a whole host to time out.
3456 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3457 addresses were routed directly to files or pipes from a redirect router.
3458 File deliveries just didn't batch; pipe deliveries might have suffered
3461 PH/06 A failure to get a lock for a hints database would erroneously always say
3462 "Failed to get write lock", even when it was really a read lock.
3464 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3465 of 0600. This has been changed to use the value of the lockfile_mode
3466 option (which defaults to 0600).
3468 PH/08 Applied small patch from the Sieve maintainer.
3470 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3471 folder from quota calculations, a direct delivery into this folder messed
3472 up the contents of the maildirsize file. This was because the regex was
3473 used only to exclude .Trash (or whatever) when the size of the mailbox
3474 was calculated. There was no check that a delivery was happening into an
3475 excluded directory. This bug has been fixed by ignoring all quota
3476 processing for deliveries into excluded directories.
3478 PH/10 Added the maildirfolder_create_regex option to appendfile.
3484 PH/01 The code for finding all the local interface addresses on a FreeBSD
3485 system running IPv6 was broken. This may well have applied to all BSD
3486 systems, as well as to others that have similar system calls. The broken
3487 code found IPv4 interfaces correctly, but gave incorrect values for the
3488 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3489 that it would not match correctly against @[] and not recognize the IPv6
3492 PH/02 The ipliteral router was not recognizing addresses of the form user@
3493 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3495 PH/03 Added disable_ipv6.
3497 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3498 decoded form, because it is most often used to construct To: headers
3499 lines in autoreplies, and the decoded form may well be syntactically
3500 invalid. However, $reply_address has leading white space removed, and all
3501 newlines turned into spaces so that the autoreply transport does not
3504 PH/05 If group was specified without a user on a router, and no group or user
3505 was specified on a transport, the group from the router was ignored.
3507 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3508 for visible compile-time settings that can be used to change these
3509 numbers, for those that want even more. Backwards compatibility with old
3510 spool files has been maintained. However, going back to a previous Exim
3511 release will lost any variables that are in spool files.
3513 PH/07 Two small changes when running in the test harness: increase delay when
3514 passing a TCP/IP connection to a new process, in case the original
3515 process has to generate a bounce, and remove special handling of
3516 127.0.0.2 (sic), which is no longer necessary.
3518 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3519 be the same on different OS.
3521 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3524 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3525 whether --show-vars was specified or not
3527 JJ/02 exipick: Added support for new ACL variable spool format introduced
3530 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3531 syntactically invalid From: or Reply-to: line, and a filter used this to
3532 generate an autoreply, and therefore failed to obtain an address for the
3533 autoreply, Exim could try to deliver to a non-existent relative file
3534 name, causing unrelated and misleading errors. What now happens is that
3535 it logs this as a hard delivery error, but does not attempt to create a
3538 PH/11 The exinext utility has a -C option for testing purposes, but although
3539 the given file was scanned by exinext itself; it wasn't being passed on
3540 when Exim was called.
3542 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3543 an end-of-file indication when reading a command response.
3545 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3546 compiled. In many other places in Exim, IPv6 addresses are always
3547 recognized, so I have changed this. It also means that IPv4 domain
3548 literals of the form [IPV4:n.n.n.n] are now always recognized.
3550 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3551 used if the router is not running as root, for example, when verifying at
3552 ACL time, or when using -bh. The debugging output from this situation was
3553 non-existent - all you got was a failure to exec. I have made two
3556 (a) Failures to set uid/gid, the current directory, or a process leader
3557 in a subprocess such as that created by queryprogram now generate
3558 suitable debugging output when -d is set.
3560 (b) The queryprogram router detects when it is not running as root,
3561 outputs suitable debugging information if -d is set, and then runs
3562 the subprocess without attempting to change uid/gid.
3564 PH/15 Minor change to Makefile for building test_host (undocumented testing
3567 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3568 additional section of a DNS packet that returns MX or SRV records.
3569 Instead, it always explicitly searches for A/AAAA records. This avoids
3570 major problems that occur when a DNS server includes only records of one
3571 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3572 fixed another bug: if SRV records were looked up and the corresponding
3573 address records were *not* found in the additional section, the port
3574 values from the SRV records were lost.
3576 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3577 using the correct key (the original address) when searching the retry
3578 rules in order to find which one to use for generating the retry hint.
3580 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3581 adding the default one. Similarly, if it contains a Reply-To: header, the
3582 errors_reply_to option, if set, is not used.
3584 PH/19 When calculating a retry time, Exim used to measure the "time since
3585 failure" by looking at the "first failed" field in the retry record. Now
3586 it does not use this if it is later than than the arrival time of the
3587 message. Instead it uses the arrival time. This makes for better
3588 behaviour in cases where some deliveries succeed, thus re-setting the
3589 "first failed" field. An example is a quota failure for a huge message
3590 when small messages continue to be delivered. Without this change, the
3591 "time since failure" will always be short, possible causing more frequent
3592 delivery attempts for the huge message than are intended.
3593 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3595 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3596 $1, $2, $3) because the numerical variables can be reset during some
3597 expansion items (e.g. "match"), thereby losing the authentication data.
3599 PH/21 Make -bV show the size of off_t variables so that the test suite can
3600 decide whether to run tests for quotas > 2G.
3602 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3603 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3604 filecount value is greater than 2G or if a quota value is greater than 2G
3605 on a system where the size of off_t is not greater than 4, a panic error
3608 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3609 never match. The debug and -bh output now contains an explicit error
3610 message indicating a malformed IPv4 address or mask.
3612 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3613 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3614 PH/23 above applies.
3616 PH/25 Do not write to syslog when running in the test harness. The only
3617 occasion when this arises is a failure to open the main or panic logs
3618 (for which there is an explicit test).
3620 PH/26 Added the /no_tell option to "control=freeze".
3622 PH/27 If a host name lookup failed very early in a connection, for example, if
3623 the IP address matched host_lookup and the reverse lookup yielded a name
3624 that did not have a forward lookup, an error message of the form "no IP
3625 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3626 could be logged. Now it outputs the IP address instead of "NULL".
3628 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3629 allows the sender and the authenticated sender to be set when
3630 submitting a message from within Exim. Since child_open_exim() is
3631 documented for local_scan(), the new function should be too.
3633 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3634 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3635 results in an empty string is now treated as unset.
3637 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3639 PH/31 Added sender_verify_fail logging option.
3641 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3642 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3643 tidied the source and removed it altogether.
3645 PH/33 When a queue run was abandoned because the load average was too high, a
3646 log line was always written; now it is written only if the queue_run log
3647 selector is set. In addition, the log line for abandonment now contains
3648 information about the queue run such as the pid. This is always present
3649 in "start" and "stop" lines but was omitted from the "abandon" line.
3651 PH/34 Omit spaces between a header name and the colon in the error message that
3652 is given when verify = headers_syntax fails (if there are lots of them,
3653 the message gets confusing).
3655 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3656 names, as there are now some PTR records that contain slashes. This check
3657 is only to protect against broken name servers that fall over on strange
3658 characters, so the fact that it applies to all lookups doesn't matter.
3660 PH/36 Now that the new test suite is complete, we can remove some of the
3661 special code in Exim that was needed for the old test suite. For example,
3662 sorting DNS records because real resolvers return them in an arbitrary
3663 order. The new test suite's fake resolver always returns records in the
3666 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3667 bounces) except when queue_only is set, to avoid logging races between
3668 the different processes.
3670 PH/38 Panic-die if .include specifies a non-absolute path.
3672 PH/39 A tweak to the "H" retry rule from its user.
3674 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3675 a label. They prevented compilation on older perls.
3677 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3678 a warning to be raised on newish perls.
3680 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3681 on queue. Changes to match documented behaviour of showing count of
3682 messages matching specified criteria.
3684 PH/40 Changed the default ident timeout from 30s to 5s.
3686 PH/41 Added support for the use of login_cap features, on those BSD systems
3687 that have them, for controlling the resources used by pipe deliveries.
3689 PH/42 The content-scanning code uses fopen() to create files in which to put
3690 message data. Previously it was not paying any attention to the mode of
3691 the files. Exim runs with umask(0) because the rest of the code creates
3692 files with open(), and sets the required mode explicitly. Thus, these
3693 files were ending up world-writeable. This was not a big issue, because,
3694 being within the spool directory, they were not world-accessible. I have
3695 created a function called modefopen, which takes an additional mode
3696 argument. It sets umask(777), creates the file, chmods it to the required
3697 mode, then resets the umask. All the relevant calls to fopen() in the
3698 content scanning code have been changed to use this function.
3700 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3701 to 24 hours. This avoids potential overflow problems when processing G
3702 and H retry rules. I suspect nobody ever tinkers with this value.
3704 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3706 PH/45 When the plaintext authenticator is running as a client, the server's
3707 challenges are checked to ensure they are valid base64 strings. By
3708 default, the authentication attempt is cancelled if an invalid string is
3709 received. Setting client_ignore_invalid_base64 true ignores these errors.
3710 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3711 they are received. Thus, the responses can be made to depend on the
3712 challenges. If an invalid string is ignored, an empty string is placed in
3715 PH/46 Messages that are created by the autoreply transport now contains a
3716 References: header, in accordance with RFCs 2822 and 3834.
3718 PH/47 Added authenticated_sender_force to the smtp transport.
3720 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3722 PH/49 Installed latest patch from the Sieve maintainer.
3724 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3725 was also set, the appendfile transport was unnecessarily scanning a
3726 directory of message files (e.g. for maildir delivery) to find the count
3727 of files (along with the size), even though it did not need this
3728 information. It now does the scan only if it needs to find either the
3729 size of the count of files.
3731 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3733 PH/52 Two bugs concerned with error handling when the smtp transport is
3736 (i) Exim was not creating retry information for temporary errors given
3737 for individual recipients after the DATA command when the smtp transport
3738 was used in LMTP mode. This meant that they could be retried too
3739 frequently, and not timed out correctly.
3741 (ii) Exim was setting the flag that allows error details to be returned
3742 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3743 recipients that were returned after the DATA command.
3745 PH/53 This is related to PH/52, but is more general: for any failing address,
3746 when detailed error information was permitted to be returned to the
3747 sender, but the error was temporary, then after the final timeout, only
3748 "retry timeout exceeded" was returned. Now it returns the full error as
3749 well as "retry timeout exceeded".
3751 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3752 do this, and (what is worse) MTAs that accept it.
3754 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3755 will now be deprecated.
3757 PH/56 New os.c-cygwin from the Cygwin maintainer.
3759 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3760 formats (previously only available in exim formats via -bpr, -bpru,
3761 and -bpra. Now also available in native and exiqgrep formats)
3763 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3764 with very large, slow to parse queues
3766 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3768 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3770 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3771 responses to authentication challenges, though it was showing the
3772 challenges; (ii) I've removed the CR characters from the debug output for
3775 PH/58 Allow for the insertion of a newline as well as a space when a string
3776 is turned into more than one encoded-word during RFC 2047 encoding. The
3777 Sieve code now uses this.
3779 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3780 data_4xx, lost_connection, tls_required.
3782 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3783 message was being sent as an SMTP response.
3785 PH/61 Add -l and -k options to exicyclog.
3787 PH/62 When verifying, if an address was redirected to one new address, so that
3788 verification continued, and the new address failed or deferred after
3789 having set something in $address_data, the value of $address_data was not
3790 passed back to the ACL. This was different to the case when no
3791 redirection occurred. The value is now passed back in both cases.
3793 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3794 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3795 use login_cap.h, so on its own it isn't the distinguishing feature. The
3796 new name refers directly to the setclassresources() function.
3798 PH/65 Added configuration files for NetBSD3.
3800 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3802 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3803 is preferred over IPv4.
3805 PH/68 The bounce_return_message and bounce_return_body options were not being
3806 honoured for bounces generated during the reception of non-SMTP messages.
3807 In particular, this applied to messages rejected by the ACL. This bug has
3808 been fixed. However, if bounce_return_message is true and bounce_return_
3809 body is false, the headers that are returned for a non-SMTP message
3810 include only those that have been read before the error was detected.
3811 (In the case of an ACL rejection, they have all been read.)
3813 PH/69 The HTML version of the specification is now built in a directory called
3814 spec_html instead of spec.html, because the latter looks like a path with
3815 a MIME-type, and this confuses some software.
3817 PH/70 Catch two compiler warnings in sieve.c.
3819 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3820 function verify_get_ident() calls ip_connect() to connect a socket, but
3821 if the "connect()" function timed out, ip_connect() used to close the
3822 socket. However, verify_get_ident() also closes the socket later, and in
3823 between Exim writes to the log, which may get opened at this point. When
3824 the socket was closed in ip_connect(), the log could get the same file
3825 descriptor number as the socket. This naturally causes chaos. The fix is
3826 not to close the socket in ip_connect(); the socket should be closed by
3827 the function that creates it. There was only one place in the code where
3828 this was missing, in the iplookup router, which I don't think anybody now
3829 uses, but I've fixed it anyway.
3831 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3832 well as to direct DNS lookups. Otherwise the handling of names in host
3833 lists is inconsistent and therefore confusing.
3839 PH/01 Two changes to the default runtime configuration:
3841 (1) Move the checks for relay_from_hosts and authenticated clients from
3842 after to before the (commented out) DNS black list checks.
3844 (2) Add control=submission to the relay_from_hosts and authenticated
3845 clients checks, on the grounds that messages accepted by these
3846 statements are most likely to be submissions.
3848 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3850 (1) Generate an error if the third argument for the ${prvs expansion is
3853 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3856 (3) Reset the variables that are obtained from the first argument of
3857 ${prvscheck and used in the second argument before leaving the code,
3858 because their memory is reclaimed, so using them afterwards may do
3861 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3862 one (it's much easier than Tom thought :-).
3864 (5) Because of (4), we can now allow for the use of $prvscheck_result
3865 inside the third argument.
3867 PH/03 For some reason, the default setting of PATH when running a command from
3868 a pipe transport was just "/usr/bin". I have changed it to
3871 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3872 anything to be listed in the output from -bV.
3874 PH/05 When a filter generated an autoreply, the entire To: header line was
3875 quoted in the delivery log line, like this:
3877 => >A.N.Other <ano@some.domain> <original@ddress> ...
3879 This has been changed so that it extracts the operative address. There
3880 may be more than one such address. If so, they are comma-separated, like
3883 => >ano@some.domain,ona@other.domain <original@ddress> ...
3885 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3886 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3887 not being looked up in the rDNS to get a host name, Exim was showing the
3888 IP address twice in Received: lines, even though the IP addresses were
3889 identical. For example:
3891 Received: from [1.2.3.4] (helo=[1.2.3.4])
3893 However, if the real host name was known, it was omitting the HELO data
3894 if it matched the actual IP address. This has been tidied up so that it
3895 doesn't show the same IP address twice.
3897 PH/07 When both +timestamp and +memory debugging was on, the value given by
3898 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3899 called by the debug printing, thereby overwriting the timestamp buffer.
3900 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3902 PH/08 When the original message was included in an autoreply transport, it
3903 always said "this is a copy of the message, including all the headers",
3904 even if body_only or headers_only was set. It now gives an appropriate
3907 PH/09 Applied a patch from the Sieve maintainer which:
3909 o fixes some comments
3910 o adds the (disabled) notify extension core
3911 o adds some debug output for the result of if/elsif tests
3912 o points to the current vacation draft in the documentation
3913 and documents the missing references header update
3917 o fixes a bug in processing the envelope test (when testing
3918 multiple envelope elements, the last element determined the
3921 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3922 Electronic Mail") by including:
3924 Auto-submitted: auto-generated
3926 in the messages that it generates (bounce messages and others, such as
3927 warnings). In the case of bounce messages for non-SMTP messages, there was
3928 also a typo: it was using "Auto_submitted" (underscore instead of
3929 hyphen). Since every message generated by Exim is necessarily in response
3930 to another message, thes have all been changed to:
3932 Auto-Submitted: auto-replied
3934 in accordance with these statements in the RFC:
3936 The auto-replied keyword:
3938 - SHOULD be used on messages sent in direct response to another
3939 message by an automatic process,
3941 - MUST NOT be used on manually-generated messages,
3943 - MAY be used on Delivery Status Notifications (DSNs) and Message
3944 Disposition Notifications (MDNs),
3946 - MUST NOT be used on messages generated by automatic or periodic
3947 processes, except for messages which are automatic responses to
3950 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3951 to the default Received: header definition.
3953 PH/12 Added log selector acl_warn_skipped (default on).
3955 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3956 variables because (a) they are in the wrong storage pool and (b) even if
3957 they were copied, it wouldn't work properly because of the caching.
3959 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3960 checking when decoding. Apparently there are clients that generate
3961 overlong encoded strings. Why am I not surprised?
3963 PH/15 If the first argument of "${if match_address" was not empty, but did not
3964 contain an "@" character, Exim crashed. Now it writes a panic log message
3965 and treats the condition as false.
3967 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3969 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3970 extension "envelope-auth". The code is finished and in agreement with
3971 other implementations, but there is no documentation so far and in fact,
3972 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3973 not changing the active code.
3975 Print executed "if" and "elsif" statements when debugging is used. This
3976 helps a great deal to understand what a filter does.
3978 Document more things not specified clearly in RFC3028. I had all this
3979 sorted out, when out of a sudden new issues came to my mind. Oops."
3981 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3984 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3985 canonical form (as documented). However, after a host name lookup from
3986 the IP address, check_host() was doing a simple string comparison with
3987 addresses acquired from the DNS when checking that the found name did
3988 have the original IP as one of its addresses. Since any found IPv6
3989 addresses are likely to be in abbreviated form, the comparison could
3990 fail. Luckily, there already exists a function for doing the comparison
3991 by converting both addresses to binary, so now that is used instead of
3992 the text comparison.
3994 PH/20 There was another similar case to PH/19, when a complete host name was
3995 given in a host list; looking up its IP address could give an abbreviated
3996 form, whereas the current host's name might or might not be abbreviated.
3997 The same fix has been applied.
4003 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4004 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4007 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4008 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4010 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4012 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4013 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4014 Also, for "Auto-Submitted", treat anything other than "no" as
4015 non-personal, in accordance with RFC 3834. (Previously it treated
4016 anything starting "auto-" as non-personal.)
4018 TF/01 The control=submission/name=... option had a problem with syntax
4019 errors if the name included a slash character. The /name= option
4020 now slurps the rest of the string, so it can include any characters
4021 but it must come last in the list of options (after /sender_retain
4024 PH/05 Some modifications to the interface to the fake nameserver for the new
4032 TK/01 Added the "success_on_redirect" address verification option. See
4033 NewStuff for rationale and an example.
4035 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4037 PH/02 Patch to exigrep to allow it to work on syslog lines.
4039 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4040 fread() to skip over the body file's header line, because in Cygwin the
4041 header line is locked and is inaccessible.
4043 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4044 co-exist for some time) to make it clear that it is the Exim ID that is
4045 referenced, not the Message-ID: header line.
4047 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4048 string_format() function, because snprintf() does not exist on all
4051 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4052 ${stat: expansion item.
4054 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4055 protocol synchronization error", to keep the pedants happy.
4057 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4058 well as for IRIX systems, when gcc is being used. See the host.c source
4061 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4063 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4066 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4067 transport and to the smtp transport in LMTP mode.
4069 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4071 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4072 run a filter in a subprocess. This could lead to confusion in subsequent
4073 lookups in the parent process. There should also be a search_tidyup() at
4074 the end of the subprocess.
4076 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4077 only if the host matched helo_try_verify_hosts, which caused the
4078 verification to occur when the EHLO/HELO command was issued. The ACL just
4079 tested the remembered result. Now, if a previous verification attempt has
4080 not happened, "verify = helo" does it there and then.
4082 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4084 TK/03 Fix log output including CR from clamd.
4086 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4087 exist provoked a memory error which could cause a segfault.
4089 PH/15 Installed PCRE 6.2
4091 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4093 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4094 of the problem. Specifically, suggested +O2 rather than +O1 for the
4097 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4099 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4100 record, the port was not correctly logged when the outgoing_port log
4101 selector was set (it logged the transort's default port).
4103 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4104 fallback_hosts, and "hosts" in the smtp transport.
4106 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4107 host errors such as "Connection refused".
4109 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4110 authentication with radiusclient 0.4.9:
4112 - Error returned from rc_read_config was caught wrongly
4113 - Username/password not passed on to radius server due to wrong length.
4115 The presumption is that some radiusclient API changes for 4.51/PH/17
4116 were not taken care of correctly. The code is still untested by me (my
4117 Linux distribution still has 0.3.2 of radiusclient), but it was
4118 contributed by a Radius user.
4120 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4121 expanding the "port" option of the smtp transport.
4123 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4124 while reading a MIME header. Thanks to Tom Hughes for a patch.
4126 PH/24 Include config.h inside local_scan.h so that configuration settings are
4129 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4130 that in an ACL for RCPT (for example), you can examine exactly what was
4133 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4134 commands, but it was not correctly comparing the address with the actual
4135 client host address. Thus, it would show the EHLO address in Received:
4136 header lines when this was not necessary.
4138 PH/27 Added the % operator to ${eval:}.
4140 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4141 it should be ignoring failures (because with -C, for example, it has lost
4142 privilege). It wasn't ignoring creation failures other than "already
4145 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4148 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4149 because an input line was too long, either on its own, or by virtue of
4150 too many continuations, the temporary file was not being removed, and the
4151 return code was incorrect.
4153 PH/31 Missing "BOOL" in function definition in filtertest.c.
4155 PH/32 Applied Sieve patches from the maintainer.
4157 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4159 PH/33 Added "verify = not_blind".
4161 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4162 Local/Makefile (with some defaults set). These are used in built scripts
4163 such as exicyclog, but they have never been used in the exim_install
4164 script (though there are many overriding facilities there). I have
4165 arranged that the exim_install script now takes note of these two
4168 PH/35 Installed configuration files for Dragonfly.
4170 PH/36 When a locally submitted message by a trusted user did not contain a
4171 From: header, and the sender address was obtained from -f or from an SMTP
4172 MAIL command, and the trusted user did not use -F to supply a sender
4173 name, $originator_name was incorrectly used when constructing a From:
4174 header. Furthermore, $originator_name was used for submission mode
4175 messages from external hosts without From: headers in a similar way,
4176 which is clearly wrong.
4178 PH/37 Added control=suppress_local_fixups.
4180 PH/38 When log_selector = +received_sender was set, and the addition of the
4181 sender made the log line's construction buffer exactly full, or one byte
4182 less than full, an overflow happened when the terminating "\n" was
4185 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4186 when the result of a list match is failure because a DNS lookup failed.
4188 PH/40 RM_COMMAND is now used in the building process.
4190 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4191 the "build-* directories that it finds.
4193 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4194 address in a domain literal was a prefix of an interface address.
4196 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4197 when verifying a sender address, unless rewrite_headers is false.
4199 PH/44 Wrote a long comment about why errors_to addresses are verified as
4200 recipients, not senders.
4202 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4203 the ratelimit ACL was added.
4205 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4207 PH/46 Added extra information about PostgreSQL errors to the error string.
4209 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4210 avoiding the need to install special zones in a real server. This is
4211 backwards compatible; if it can't find the fake resolver, it drops back.
4212 Thus, both old and new test suites can be run.
4214 TF/02 Added util/ratelimit.pl
4216 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4217 clock is set back in time.
4219 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4220 Candler <B.Candler@pobox.com>.
4222 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4223 OK for addresses that are the result of redirections.
4225 PH/48 A number of further additions for the benefit of the new test suite,
4226 including a fake gethostbyname() that interfaces to the fake DNS resolver
4229 TF/06 The fix for widen_domains has also been applied to qualify_single and
4230 search_parents which are the other dnslookup options that can cause
4233 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4236 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4238 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4239 service" if it encountered an MX record with an empty target hostname.
4240 The message is now "an MX or SRV record indicated no SMTP service".
4242 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4243 if the DNS of the sending site is misconfigured. This is quite a
4244 common situation. This change restores the behaviour of treating a
4245 helo verification defer as a failure.
4247 PH/51 If self=fail was set on a router, the bounce message did not include the
4248 actual error message.
4254 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4256 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4257 command itself ended in error, the underlying message about the transport
4258 filter timeout was being overwritten with the pipe command error. Now the
4259 underlying error message should be appended to the second error message.
4261 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4263 PH/02 Reduce the amount of output that "make" produces by default. Full output
4264 can still be requested.
4266 PH/03 The warning log line about a condition test deferring for a "warn" verb
4267 was being output only once per connection, rather than after each
4268 occurrence (because it was using the same function as for successful
4269 "warn" verbs). This seems wrong, so I have changed it.
4271 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4272 it should not have, which might have caused a crash in the right
4273 circumstances, but probably never did.
4275 PH/04 Installed a modified version of Tony Finch's patch to make submission
4276 mode fix the return path as well as the Sender: header line, and to
4277 add a /name= option so that you can make the user's friendly name appear
4280 TF/03 Added the control = fakedefer ACL modifier.
4282 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4283 Mark Lowes for thorough testing.
4285 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4287 TK/03 Merged latest SRS patch from Miles Wilton.
4289 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4290 with the definition in sysexits.h (which is #included earlier).
4291 Fortunately, Exim does not actually use EX_OK. The code used to try to
4292 preserve the sysexits.h value, by assuming that macro definitions were
4293 scanned for macro replacements. I have been disabused of this notion,
4294 so now the code just undefines EX_OK before #including unistd.h.
4296 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4297 in the smtp transport. When a block could not be written in a single
4298 write() function, the timeout was being re-applied to each part-write.
4299 This seems wrong - if the receiver was accepting one byte at a time it
4300 would take for ever. The timeout is now adjusted when this happens. It
4301 doesn't have to be particularly precise.
4303 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4304 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4306 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4307 without a domain if the check to <postmaster@domain> fails.
4309 SC/01 Eximstats: added -xls and the ability to specify output files
4310 (patch written by Frank Heydlauf).
4312 SC/02 Eximstats: use FileHandles for outputting results.
4314 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4316 SC/04 Eximstats: fixed display of large numbers with -nvr option
4318 SC/05 Eximstats: fixed merging of reports with empty tables.
4320 SC/06 Eximstats: added the -include_original_destination flag
4322 SC/07 Eximstats: removed tabs and trailing whitespace.
4324 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4326 TK/06 MBOX spool code: Add real "From " MBOX separator line
4327 so the .eml file is really in mbox format (even though
4328 most programs do not really care). Patch from Alex Miller.
4330 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4331 The latter is generated from $received_to and is only set if the
4332 message has one envelope recipient. SA can use these headers,
4333 obviously out-of-the-box. Patch from Alex Miller.
4335 PH/08 The ${def test on a variable was returning false if the variable's
4336 value was "0", contrary to what the specification has always said!
4337 The result should be true unless the variable is empty.
4339 PH/09 The syntax error of a character other than { following "${if
4340 def:variable_name" (after optional whitespace) was not being diagnosed.
4341 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4342 accidental colon was present, for example, could give incorrect results.
4344 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4345 result is used (not including appendfile, where other changes are about
4348 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4349 This involved changing a lot of size variables from int to off_t. It
4350 should work with maildirs and everything.
4352 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4353 spamd dying while we are connected to it.
4355 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4358 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4359 function for BDB 4.3.
4361 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4363 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4364 the sources for PCRE have been re-arranged and more files are now
4367 PH/15 The code I had for printing potentially long long variables in PH/11
4368 above was not the best (it lost precision). The length of off_t variables
4369 is now inspected at build time, and an appropriate printing format (%ld
4370 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4371 to be "long long int" or "long int". This is needed for the internal
4372 formatting function string_vformat().
4374 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4375 the configuration file to be ":syslog", then the script "guesses" where
4376 the logs files are, rather than using the compiled in default. In our
4377 case the guess is not the same as the compiled default, so the script
4378 suddenly stopped working when I started to use syslog. The patch checks
4379 to see if log_file_path is "". If so, it attempts to read it from exim
4380 with no configuration file to get the compiled in version, before it
4381 falls back to the previous guessing code."
4383 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4384 implementing BATV in an Exim configuration. See NewStuff for the gory
4387 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4388 Makefile that are specific to HP-UX.
4390 PH/18 If the "use_postmaster" option was set for a recipient callout together
4391 with the "random" option, the postmaster address was used as the MAIL
4392 FROM address for the random test, but not for the subsequent recipient
4393 test. It is now used for both.
4395 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4396 patch removes a few documentation additions to RFC 3028, because the
4397 latest draft now contains them. It adds the new en;ascii-case comparator
4398 and a new error check for 8bit text in MIME parts. Comparator and
4399 require names are now matched exactly. I enabled the subaddress
4400 extension, but it is not well tested yet (read: it works for me)."
4402 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4403 rework some of the code of TK/09 above to avoid the hardwired use of
4404 "%lld" and "long long". Replaced the call to snprintf() with a call to
4407 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4408 records point to non-existent hosts", "retry timeout exceeded", and
4409 "retry time not reached for any host after a long failure period".
4411 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4412 experimental DomainKeys support:
4414 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4415 (2) On an error such as an illegally used "control", the wrong name for
4416 the control was given.
4418 These problems did NOT occur unless DomainKeys support was compiled.
4420 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4422 PH/24 Added ${if match_ip condition.
4424 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4425 databases so that it will be absolutely obvious if a crash occurs in the
4426 DB library. This is a regular occurrence (often caused by mis-matched
4429 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4430 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4431 picked up on a user's system that detects such things. There doesn't seem
4432 to be a gcc warning option for this - only an attribute that has to be
4433 put on the function's prototype. It seems that in Fedora Core 4 they have
4434 set this on a number of new functions. No doubt there will be more in due
4437 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4438 specify a transport. However, if an address that was verified by such a
4439 router was the subject of a callout, Exim crashed because it tried to
4440 read the rcpt_include_affixes from the non-existent transport. Now it
4441 just assumes that the setting of that option is false. This bug was
4442 introduced by 4.51/PH/31.
4444 PH/28 Changed -d+all to exclude +memory, because that information is very
4445 rarely of interest, but it makes the output a lot bigger. People tend to
4446 do -d+all out of habit.
4448 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4449 code in os-type was giving problems when libc.so lives in lib64, like on
4452 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4453 aren't the modern standard, and it seems that some systems' include files
4454 don't always have them. Exim was already checking for some of the newer
4455 ones like T_AAAA, and defining it itself. I've added checks for all the
4456 record types that Exim uses.
4458 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4459 not automatically generating a new one, as it is supposed to. This
4460 prevented TLS from working. If the file did exist, but contained invalid
4461 data, a new version was generated, as expected. It was only the case of a
4462 non-existent file that was broken.
4464 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4465 with a change in libdomainkeys > 0.64.
4467 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4468 from DNS. If the selector record carries the flag, it now has
4469 precedence over the domain-wide flag.
4471 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4473 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4474 the use of a port name that isn't defined in /etc/services) occurred, the
4475 message was deferred as in a normal delivery, and thus remained on the
4476 spool, instead of being failed because of the mua_wrapper setting. This
4477 is now fixed, and I tidied up some of the mua_wrapper messages at the
4480 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4481 the messages in a hash of arrays rather than using individual hashes.
4482 This is a bit cleaner and results in dramatic memory savings, albeit
4483 at a slight CPU cost.
4485 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4486 as requested by Marc Sherman.
4488 SC/10 Eximstats: added histograms for user specified patterns as requested
4491 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4493 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4494 fopen() in the content-scanning modules that did not already have it.
4500 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4501 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4503 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4505 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4507 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4508 to test Sieve filters that use "vacation".
4510 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4511 that changes the way the GnuTLS parameters are stored in the cache file.
4512 The new format can be generated externally. For backward compatibility,
4513 if the data in the cache doesn't make sense, Exim assumes it has read an
4514 old-format file, and it generates new data and writes a new file. This
4515 means that you can't go back to an older release without removing the
4518 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4519 work if there are any delivery delays because "one_time" forces the
4520 parent to be marked "delivered", so its unseen clone is never tried
4521 again. For this reason, Exim now forbids the simultaneous setting of
4524 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4525 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4526 entry if you want to know the details. The fix, however, neglected to
4527 consider the case when local delivery batching is involved. The test for
4528 "previously delivered" was not happening when checking to see if an
4529 address could be batched with a previous (undelivered) one; under
4530 certain circumstances this could lead to multiple deliveries to the same
4533 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4534 in its include files, and this causes problems building Exim.
4536 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4537 header_syntax) but Exim was just ignoring anything given after a slash.
4538 In particular, this caused confusion with an attempt to use "verify =
4539 reverse_host_lookup/defer_ok". An error is now given when options are
4540 supplied for verify items that do not have them. (Maybe reverse_host_
4541 lookup should have a defer_ok option, but that's a different point.)
4543 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4544 defined by RFC 821) to 2048, because there were problems with some AUTH
4545 commands, and RFC 1869 says the size should be increased for extended
4546 SMTP commands that take arguments.
4548 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4551 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4552 "unknown" error; now it says that the functionality isn't in the binary.
4554 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4555 an address' error message when a string expansion fails (syntax or
4556 whatever). Otherwise the password may appear in the log. Following change
4557 PH/42 below, there is no longer a chance of it appearing in a bounce
4560 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4562 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4563 of its addresses was ever tried. (Bugzilla bug #2.)
4565 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4566 the result incorrectly in the debug output. (It correctly added a newline
4567 to what was transported.)
4569 TF/01 Added $received_time.
4571 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4572 commented out examples of how to interface to a virus scanner and to
4573 SpamAssassin. Also added commented examples of av_scanner and
4574 spamd_address settings.
4576 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4577 and controls are allowed in which ACLs. There were a couple of minor
4578 errors. Some of the entries in the conditions table (which is a table of
4579 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4580 negation of where the condition IS allowed.
4582 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4584 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4585 header file does not have a version number, so I've had to invent a new
4586 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4587 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4588 radiusclient), but it was contributed by a Radius user.
4590 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4591 files or directories, for OpenSSL.
4593 PH/19 When an Exim process that is running as root has to create an Exim log
4594 file, it does so in a subprocess that runs as exim:exim so as to get the
4595 ownership right at creation (otherwise, other Exim processes might see
4596 the file with the wrong ownership). There was no test for failure of this
4597 fork() call, which would lead to the process getting stuck as it waited
4598 for a non-existent subprocess. Forks do occasionally fail when resources
4599 run out. I reviewed all the other calls to fork(); they all seem to check
4602 PH/20 When checking for unexpected SMTP input at connect time (before writing
4603 the banner), Exim was not dealing correctly with a non-positive return
4604 from the read() function. If the client had disconnected by this time,
4605 the result was a log entry for a synchronization error with an empty
4606 string after "input=" when read() returned zero. If read() returned -1
4607 (an event I could not check), uninitialized data bytes were printed.
4608 There were reports of junk text (parts of files, etc) appearing after
4611 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4613 PH/22 Added support for macro redefinition, and (re)definition in between
4614 driver and ACL definitions.
4616 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4617 forgetting to use the resulting value; it was using the unexpanded value.
4619 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4620 hadn't been configured. The fix is from Juergen Kreileder, who
4621 understands it better than I do:
4623 "Here's what I see happening with three configured cyrus_sasl
4624 authenticators configured (plain, login, cram-md5):
4626 On startup auth_cyrus_sasl_init() gets called for each of these.
4627 This means three calls to sasl_listmech() without a specified mech_list.
4628 => SASL tests which mechs of all available mechs actually work
4629 => three warnings about OTP not working
4630 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4632 With the patch, sasl_listmech() also gets called three times. But now
4633 SASL's mech_list option is set to the server_mech specified in the the
4634 authenticator. Or in other words, the answer from sasl_listmech()
4635 gets limited to just the mech you're testing for (which is different
4637 => the return list contains just 'plain' or 'login', 'cram-md5' or
4638 nothing depending on the value of ob->server_mech.
4640 I've just tested the patch: Authentication still works fine,
4641 unavailable mechs specified in the exim configuration are still
4642 caught, and the auth.log warnings about OTP are gone."
4644 PH/25 When debugging is enabled, the contents of the command line are added
4645 to the debugging output, even when log_selector=+arguments is not
4648 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4649 answer is "GNU", and only if the return is "GNU/something" is the answer
4652 PH/27 $acl_verify_message is now set immediately after the failure of a
4653 verification in an ACL, and so is available in subsequent modifiers. In
4654 particular, the message can be preserved by coding like this:
4656 warn !verify = sender
4657 set acl_m0 = $acl_verify_message
4659 Previously, $acl_verify_message was set only while expanding "message"
4660 and "log_message" when a very denied access.
4662 PH/28 Modified OS/os.c-Linux with
4664 -#ifndef OS_LOAD_AVERAGE
4665 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4667 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4668 nomenclature these days.)
4670 PH/29 Installed patch from the Sieve maintainer that adds the options
4671 sieve_useraddress and sieve_subaddress to the redirect router.
4673 PH/30 In these circumstances:
4674 . Two addresses routed to the same list of hosts;
4675 . First host does not offer TLS;
4676 . First host accepts first address;
4677 . First host gives temporary error to second address;
4678 . Second host offers TLS and a TLS session is established;
4679 . Second host accepts second address.
4680 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4681 and peerdn, if requested) that were in fact used only for the second
4684 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4685 attention to any local part prefix or suffix that was matched by the
4686 router that accepted the address. It now behaves in the same way as it
4687 does for delivery: the affixes are removed from the local part unless
4688 rcpt_include_affixes is set on the transport.
4690 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4691 timeout during the DATA phase of an incoming message.
4693 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4694 applied a patch sanctioned by the Sieve maintainer.
4696 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4697 the uid or gid is negative. A case of a negative gid caused this to be
4698 noticed. The fix allows for either to be negative.
4700 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4701 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4704 PH/36 The change PH/12 above was broken. Fixed it.
4706 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4707 the grounds that routing the same address twice would always produce the
4708 same answer. This might have been true once, but it is certainly no
4709 longer true now. Routing a child address may depend on the previous
4710 routing that produced that child. Some complicated redirection strategies
4711 went wrong when messages had multiple recipients, and made Exim's
4712 behaviour dependent on the order in which the addresses were given.
4714 I have moved the duplicate checking until after the routing is complete.
4715 Exim scans the addresses that are assigned to local and remote
4716 transports, and removes any duplicates. This means that more work will be
4717 done, as duplicates will always all be routed, but duplicates are
4718 presumably rare, so I don't expect this is of any significance.
4720 For deliveries to pipes, files, and autoreplies, the duplicate checking
4721 still happens during the routing process, since they are not going to be
4724 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4725 It corrects a timeout issue with spamd. This is Ian's comment: "The
4726 background is that sometimes spamd either never reads data from a
4727 connection it has accepted, or it never writes response data. The exiscan
4728 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4729 blindly assumes that writes won't block so it may never time out."
4731 PH/39 Allow G after quota size as well as K and M.
4733 PH/40 The value set for $authenticated_id in an authenticator may not contain
4734 binary zeroes or newlines because the value is written to log lines and
4735 to spool files. There was no check on this. Now the value is run through
4736 the string_printing() function so that such characters are converted to
4737 printable escape sequences.
4739 PH/41 $message_linecount is a new variable that contains the total number of
4740 lines in the message. Compare $body_linecount, which is the count for the
4743 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4744 bounce and delay warning messages, except in certain special cases, which
4747 (a) An SMTP error message from a remote host;
4748 (b) A message specified in a :fail: redirection;
4749 (c) A message specified in a "fail" command in a system filter;
4750 (d) A message specified in a FAIL return from the queryprogram router;
4751 (e) A message specified by the cannot_route_message router option.
4753 In these cases only, Exim does include the error details in bounce and
4754 warning messages. There are also a few cases where bland messages such
4755 as "unrouteable address" or "local delivery error" are given.
4757 PH/43 $value is now also set for the "else" part of a ${run expansion.
4759 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4760 being worked on, but at least Exim now implements the latest version to
4763 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4764 process to complete was treated as a delivery failure, a timeout while
4765 writing the message to the pipe was logged, but erroneously treated as a
4766 successful delivery. Such timeouts include transport filter timeouts. For
4767 consistency with the overall process timeout, these timeouts are now
4768 treated as errors, giving rise to delivery failures by default. However,
4769 there is now a new Boolean option for the pipe transport called
4770 timeout_defer, which, if set TRUE, converts the failures into defers for
4771 both kinds of timeout. A transport filter timeout is now identified in
4774 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4775 systems where "make" and "gmake" are different, calling "gmake" at top
4776 level broke things. I've arranged for the value of $(MAKE) to be passed
4777 from the Makefile to this script so that it can call the same version of
4781 A note about Exim versions 4.44 and 4.50
4782 ----------------------------------------
4784 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4785 changes of various kinds. As a consequence, a big documentation update was
4786 needed. This delayed the release for rather longer than seemed good, especially
4787 in the light of a couple of (minor) security issues. Therefore, the changes
4788 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4789 release. So 4.44 and 4.50 are in effect two different branches that both start
4792 I have left the 4.50 change log unchanged; it contains all the changes since
4793 4.43. The change log for 4.44 is below; many of its items are identical to
4794 those for 4.50. This seems to be the most sensible way to preserve the
4795 historical information.
4801 1. Minor wording change to the doc/README.SIEVE file.
4803 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4804 computation of the current number of files was incorrect.
4806 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4807 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4810 4. Give more explanation in the error message when the command for a transport
4811 filter fails to execute.
4813 5. There are several places where Exim runs a non-Exim command in a
4814 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4815 was being done only for the command run by the queryprogram router. It is
4816 now done for all such subprocesses. The other cases are: ${run, transport
4817 filters, and the commands run by the lmtp and pipe transports.
4819 6. Added CONFIGURE_GROUP build-time option.
4821 7. Some older OS have a limit of 256 on the maximum number of file
4822 descriptors. Exim was using setrlimit() to set 1000 as a large value
4823 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4824 systems. I've change it so that if it can't get 1000, it tries for 256.
4826 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4827 was an oversight, and furthermore, ever since the addition of extra
4828 controls (e.g. 4.43/32), the checks on when to allow different forms of
4829 "control" were broken. There should now be diagnostics for all cases when a
4830 control that does not make sense is encountered.
4832 9. Added the /retain_sender option to "control=submission".
4834 10. $recipients is now available in the predata ACL (oversight).
4836 11. Tidy the search cache before the fork to do a delivery from a message
4837 received from the command line. Otherwise the child will trigger a lookup
4838 failure and thereby defer the delivery if it tries to use (for example) a
4839 cached ldap connection that the parent has called unbind on.
4841 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4842 of $address_data from the recipient verification was clobbered by the
4843 sender verification.
4845 13. The value of address_data from a sender verification is now available in
4846 $sender_address_data in subsequent conditions in the ACL statement.
4848 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4850 15. Added a new option "connect=<time>" to callout options, to set a different
4853 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4854 was its contents. (It was OK if the option was not defined at all.)
4856 17. A "Completed" log line is now written for messages that are removed from
4857 the spool by the -Mrm option.
4859 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4860 information about exactly what failed.
4862 19. Added -dd to debug only the daemon process.
4864 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4865 handles timeouts, both on the server side and network timeouts. Renamed the
4866 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4868 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4869 It is now set to "smtps".
4871 22. $host_address is now set to the target address during the checking of
4872 ignore_target_hosts.
4874 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4875 being passed; this would have caused $sender_host_name to have been used if
4876 matching the list had actually called for a host name (not very likely,
4877 since this list is usually IP addresses). A host name is now passed as
4880 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4881 code that specifies a non-restarting handler (typically sigaction() in
4882 modern systems) in an attempt to fix a rare and obscure crash bug.
4884 25. Narrowed the window for a race in the daemon that could cause it to ignore
4885 SIGCHLD signals. This is not a major problem, because they are used only to
4886 wake it up if nothing else does.
4888 26. A malformed maildirsize file could cause Exim to calculate negative values
4889 for the mailbox size or file count. Odd effects could occur as a result.
4890 The maildirsize information is now recalculated if the size or filecount
4893 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4894 support for a long time. Removed HAVE_SYS_VFS_H.
4896 28. Installed the latest version of exipick from John Jetmore.
4898 29. In an address list, if the pattern was not a regular expression, an empty
4899 subject address (from a bounce message) matched only if the pattern was an
4900 empty string. Non-empty patterns were not even tested. This was the wrong
4901 because it is perfectly reasonable to use an empty address as part of a
4902 database query. An empty address is now tested by patterns that are
4903 lookups. However, all the other forms of pattern expect the subject to
4904 contain a local part and a domain, and therefore, for them, an empty
4905 address still always fails if the pattern is not itself empty.
4907 30. Exim went into a mad DNS loop when attempting to do a callout where the
4908 host was specified on an smtp transport, and looking it up yielded more
4909 than one IP address.
4911 31. Re-factored the code for checking spool and log partition space into a
4912 function that finds that data and another that does the check. The former
4913 is then used to implement four new variables: $spool_space, $log_space,
4914 $spool_inodes, and $log_inodes.
4916 32. The RFC2047 encoding function was originally intended for short strings
4917 such as real names; it was not keeping to the 75-character limit for
4918 encoded words that the RFC imposes. It now respects the limit, and
4919 generates multiple encoded words if necessary. To be on the safe side, I
4920 have increased the buffer size for the ${rfc2047: expansion operator from
4923 33. It is now permitted to omit both strings after an "if" condition; if the
4924 condition is true, the result is "true". As before, when the second string
4925 is omitted, a false condition yields an empty string. This makes it less
4926 cumbersome to write custom ACL and router conditions.
4928 34. Failure to deliver a bounce message always caused it to be frozen, even if
4929 there was an errors_to setting on the router. The errors_to setting is now
4932 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4933 canonical form (fully expanded) before being placed in
4934 $sender_host_address.
4936 36. The table in the code that translates DNS record types into text (T_A to
4937 "A" for instance) was missing entries for NS and CNAME. It is just possible
4938 that this could have caused confusion if both these types were looked up
4939 for the same domain, because the text type is used as part of Exim's
4940 per-process caching. But the chance of anyone hitting this buglet seems
4943 37. The dnsdb lookup has been extended in a number of ways.
4945 (1) There is a new type, "zns", which walks up the domain tree until it
4946 finds some nameserver records. It should be used with care.
4948 (2) There is a new type, "mxh", which is like "mx" except that it returns
4949 just the host names, not the priorities.
4951 (3) It is now possible to give a list of domains (or IP addresses) to be
4952 looked up. The behaviour when one of the lookups defers can be
4953 controlled by a keyword.
4955 (4) It is now possible to specify the separator character for use when
4956 multiple records are returned.
4958 38. The dnslists ACL condition has been extended: it is now possible to supply
4959 a list of IP addresses and/or domains to be looked up in a particular DNS
4962 39. Added log_selector=+queue_time_overall.
4964 40. When running the queue in the test harness, wait just a tad after forking a
4965 delivery process, to get repeatability of debugging output.
4967 41. Include certificate and key file names in error message when GnuTLS fails
4968 to set them up, because the GnuTLS error message doesn't include the name
4969 of the failing file when there is a problem reading it.
4971 42. Allow both -bf and -bF in the same test run.
4973 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4975 44. The "Exiscan patch" is now merged into the mainline Exim source.
4977 45. Sometimes the final signoff response after QUIT could fail to get
4978 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4979 < 0 before doing a fflush(). This bug looks as though it goes back to the
4980 introduction of TLS in release 3.20, but "sometimes" must have been rare
4981 because the tests only now provoked it.
4983 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4984 (this can affect the format of dates).
4986 47. exim_tidydb, when checking for the continued existence of a message for
4987 which it has found a message-specific retry record, was not finding
4988 messages that were in split spool directories. Consequently, it was
4989 deleting retry records that should have stayed in existence.
4991 48. Steve fixed some bugs in eximstats.
4993 49. The SPA authentication driver was not abandoning authentication and moving
4994 on to the next authenticator when an expansion was forced to fail,
4995 contradicting the general specification for all authenticators. Instead it
4996 was generating a temporary error. It now behaves as specified.
4998 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4999 (the order specifies the preference for clients). The order is now AES256,
5000 AES128, 3DES, ARCFOUR128.
5002 51. Small patch to Sieve code - explicitly set From: when generating an
5005 52. Exim crashed if a remote delivery caused a very long error message to be
5006 recorded - for instance if somebody sent an entire SpamAssassin report back
5007 as a large number of 550 error lines. This bug was coincidentally fixed by
5008 increasing the size of one of Exim's internal buffers (big_buffer) that
5009 happened as part of the Exiscan merge. However, to be on the safe side, I
5010 have made the code more robust (and fixed the comments that describe what
5013 53. Now that there can be additional text after "Completed" in log lines (if
5014 the queue_time_overall log selector is set), a one-byte patch to exigrep
5015 was needed to allow it to recognize "Completed" as not the last thing in
5018 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5019 patch that reportedly fixes this has been added. I am not expert enough to
5020 create a test for it. This is what the patch creator wrote:
5022 "I found a little strange behaviour of ldap code when working with
5023 Windows 2003 AD Domain, where users was placed in more than one
5024 Organization Units. When I tried to give exim partial DN, the exit code
5025 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5026 But simultaneously result of request was absolutely normal ldap result,
5027 so I produce this patch..."
5029 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5030 REFERENCE, so I have modified the code to exclude the patch when that macro
5033 55. Some experimental protocols are using DNS PTR records for new purposes. The
5034 keys for these records are domain names, not reversed IP addresses. The
5035 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5036 leaves it alone. Component reversal etc. now happens only for IP addresses.
5039 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5041 57. Double the size of the debug message buffer (to 2048) so that more of very
5042 long debug lines gets shown.
5044 58. The exicyclog utility now does better if the number of log files to keep
5045 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5047 59. Two changes related to the smtp_active_hostname option:
5049 (1) $smtp_active_hostname is now available as a variable.
5050 (2) The default for smtp_banner uses $smtp_active_hostname instead
5051 of $primary_hostname.
5053 60. The host_aton() function is supposed to be passed a string that is known
5054 to be a valid IP address. However, in the case of IPv6 addresses, it was
5055 not checking this. This is a hostage to fortune. Exim now panics and dies
5056 if the condition is not met. A case was found where this could be provoked
5057 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5058 components; fortuitously, this particular loophole had already been fixed
5059 by change 4.50/55 above.
5061 If there are any other similar loopholes, the new check in host_aton()
5062 itself should stop them being exploited. The report I received stated that
5063 data on the command line could provoke the exploit when Exim was running as
5064 exim, but did not say which command line option was involved. All I could
5065 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5066 running as the user.
5069 61. There was a buffer overflow vulnerability in the SPA authentication code
5070 (which came originally from the Samba project). I have added a test to the
5071 spa_base64_to_bits() function which I hope fixes it.
5074 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5075 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5077 63. The daemon start-up calls getloadavg() while still root for those OS that
5078 need the first call to be done as root, but it missed one case: when
5079 deliver_queue_load_max is set with deliver_drop_privilege. This is
5080 necessary for the benefit of the queue runner, because there is no re-exec
5081 when deliver_drop_privilege is set.
5083 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5084 This has been fixed.
5086 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5087 was in use, was not putting the data itself into the right store pool;
5088 consequently, it could be overwritten for a subsequent message in the same
5089 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5092 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5094 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5095 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5096 the function were treating the return as a boolean value, which happened to
5097 work because 0=false and not-0=true, but is not correct code.
5099 68. The host_aton() function was not handling scoped IPv6 addresses (those
5100 with, for example, "%eth0" on the end) correctly.
5102 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5103 negated items (that is, ~something) in unsigned ints. Some compilers
5104 apparently mutter when there is no cast.
5106 70. If an address verification called from an ACL failed, and did not produce a
5107 user-specific message (i.e. there was only a "system" message), nothing was
5108 put in $acl_verify_message. In this situation, it now puts the system
5111 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5112 session; change 4.31/43 added the unwanted input to the log line - except
5113 that it did not do this in the start of session case. It now does.
5115 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5116 This is wrong and can cause the other end to generate a synchronization
5117 error if it is another Exim or anything else that does the synchronization
5118 check. A QUIT command is no longer sent after a timeout.
5120 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5121 during host lookups.
5123 74. The defer_ok option of callout verification was not working if it was used
5124 when verifying addresses in header lines, that is, for this case:
5126 verify = header_sender/callout=defer_ok
5128 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5129 those file descriptors could be used for SMTP connections. If anything
5130 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5131 could be sent to the SMTP client, causing chaos. The daemon now opens
5132 stdin, stdout, and stderr to /dev/null when it puts itself into the
5135 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5136 log by default. The user can override this with suitable Perl magic.
5138 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5139 the log message when discard triggers, was not working for the DATA ACL or
5140 for the non-SMTP ACL.
5142 78. Error message wording change in sieve.c.
5144 79. If smtp_accept_max_per_host was set, the number of connections could be
5145 restricted to fewer than expected, because the daemon was trying to set up
5146 a new connection before checking whether the processes handling previous
5147 connections had finished. The check for completed processes is now done
5148 earlier. On busy systems, this bug wouldn't be noticed because something
5149 else would have woken the daemon, and it would have reaped the completed
5152 80. If a message was submitted locally by a user whose login name contained one
5153 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5154 It caused a spool format error. I have fixed the spool reading code. A
5155 related problem was that the "from" clause in the Received: line became
5156 illegal because of the space(s). It is now covered by ${quote_local_part.
5158 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5161 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5163 83. Patch from Sieve maintainer to fix unterminated string problem in
5164 "vacation" handling.
5166 84. Some minor changes to the Linux configuration files to help with other
5167 OS variants using glibc.
5169 85. One more patch for Sieve to update vacation handling to latest spec.
5172 ----------------------------------------------------
5173 See the note above about the 4.44 and 4.50 releases.
5174 ----------------------------------------------------
5180 1. Change 4.43/35 introduced a bug that caused file counts to be
5181 incorrectly computed when quota_filecount was set in an appendfile
5184 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5185 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5188 3. Give more explanation in the error message when the command for a transport
5189 filter fails to execute.
5191 4. There are several places where Exim runs a non-Exim command in a
5192 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5193 was being done only for the command run by the queryprogram router. It is
5194 now done for all such subprocesses. The other cases are: ${run, transport
5195 filters, and the commands run by the lmtp and pipe transports.
5197 5. Some older OS have a limit of 256 on the maximum number of file
5198 descriptors. Exim was using setrlimit() to set 1000 as a large value
5199 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5200 systems. I've change it so that if it can't get 1000, it tries for 256.
5202 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5203 was an oversight, and furthermore, ever since the addition of extra
5204 controls (e.g. 4.43/32), the checks on when to allow different forms of
5205 "control" were broken. There should now be diagnostics for all cases when a
5206 control that does not make sense is encountered.
5208 7. $recipients is now available in the predata ACL (oversight).
5210 8. Tidy the search cache before the fork to do a delivery from a message
5211 received from the command line. Otherwise the child will trigger a lookup
5212 failure and thereby defer the delivery if it tries to use (for example) a
5213 cached ldap connection that the parent has called unbind on.
5215 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5216 of $address_data from the recipient verification was clobbered by the
5217 sender verification.
5219 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5220 was its contents. (It was OK if the option was not defined at all.)
5222 11. A "Completed" log line is now written for messages that are removed from
5223 the spool by the -Mrm option.
5225 12. $host_address is now set to the target address during the checking of
5226 ignore_target_hosts.
5228 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5229 being passed; this would have caused $sender_host_name to have been used if
5230 matching the list had actually called for a host name (not very likely,
5231 since this list is usually IP addresses). A host name is now passed as
5234 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5235 code that specifies a non-restarting handler (typically sigaction() in
5236 modern systems) in an attempt to fix a rare and obscure crash bug.
5238 15. Narrowed the window for a race in the daemon that could cause it to ignore
5239 SIGCHLD signals. This is not a major problem, because they are used only to
5240 wake it up if nothing else does.
5242 16. A malformed maildirsize file could cause Exim to calculate negative values
5243 for the mailbox size or file count. Odd effects could occur as a result.
5244 The maildirsize information is now recalculated if the size or filecount
5247 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5248 support for a long time. Removed HAVE_SYS_VFS_H.
5250 18. Updated exipick to current release from John Jetmore.
5252 19. Allow an empty sender to be matched against a lookup in an address list.
5253 Previously the only cases considered were a regular expression, or an
5256 20. Exim went into a mad DNS lookup loop when doing a callout where the
5257 host was specified on the transport, if the DNS lookup yielded more than
5260 21. The RFC2047 encoding function was originally intended for short strings
5261 such as real names; it was not keeping to the 75-character limit for
5262 encoded words that the RFC imposes. It now respects the limit, and
5263 generates multiple encoded words if necessary. To be on the safe side, I
5264 have increased the buffer size for the ${rfc2047: expansion operator from
5267 22. Failure to deliver a bounce message always caused it to be frozen, even if
5268 there was an errors_to setting on the router. The errors_to setting is now
5271 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5272 canonical form (fully expanded) before being placed in
5273 $sender_host_address.
5275 24. Updated eximstats to version 1.33
5277 25. Include certificate and key file names in error message when GnuTLS fails
5278 to set them up, because the GnuTLS error message doesn't include the name
5279 of the failing file when there is a problem reading it.
5281 26. Expand error message when OpenSSL has problems setting up cert/key files.
5284 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5285 (this can affect the format of dates).
5287 28. exim_tidydb, when checking for the continued existence of a message for
5288 which it has found a message-specific retry record, was not finding
5289 messages that were in split spool directories. Consequently, it was
5290 deleting retry records that should have stayed in existence.
5292 29. eximstats updated to version 1.35
5293 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5294 1.35 - bugfix such that pie charts by volume are generated correctly
5296 30. The SPA authentication driver was not abandoning authentication and moving
5297 on to the next authenticator when an expansion was forced to fail,
5298 contradicting the general specification for all authenticators. Instead it
5299 was generating a temporary error. It now behaves as specified.
5301 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5302 (the order specifies the preference for clients). The order is now AES256,
5303 AES128, 3DES, ARCFOUR128.
5305 31. Small patch to Sieve code - explicitly set From: when generating an
5308 32. Exim crashed if a remote delivery caused a very long error message to be
5309 recorded - for instance if somebody sent an entire SpamAssassin report back
5310 as a large number of 550 error lines. This bug was coincidentally fixed by
5311 increasing the size of one of Exim's internal buffers (big_buffer) that
5312 happened as part of the Exiscan merge. However, to be on the safe side, I
5313 have made the code more robust (and fixed the comments that describe what
5316 33. Some experimental protocols are using DNS PTR records for new purposes. The
5317 keys for these records are domain names, not reversed IP addresses. The
5318 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5319 leaves it alone. Component reversal etc. now happens only for IP addresses.
5322 34. The host_aton() function is supposed to be passed a string that is known
5323 to be a valid IP address. However, in the case of IPv6 addresses, it was
5324 not checking this. This is a hostage to fortune. Exim now panics and dies
5325 if the condition is not met. A case was found where this could be provoked
5326 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5327 components; fortuitously, this particular loophole had already been fixed
5328 by change 4.50/55 or 4.44/33 above.
5330 If there are any other similar loopholes, the new check in host_aton()
5331 itself should stop them being exploited. The report I received stated that
5332 data on the command line could provoke the exploit when Exim was running as
5333 exim, but did not say which command line option was involved. All I could
5334 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5335 running as the user.
5338 35. There was a buffer overflow vulnerability in the SPA authentication code
5339 (which came originally from the Samba project). I have added a test to the
5340 spa_base64_to_bits() function which I hope fixes it.
5343 36. The daemon start-up calls getloadavg() while still root for those OS that
5344 need the first call to be done as root, but it missed one case: when
5345 deliver_queue_load_max is set with deliver_drop_privilege. This is
5346 necessary for the benefit of the queue runner, because there is no re-exec
5347 when deliver_drop_privilege is set.
5349 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5350 was in use, was not putting the data itself into the right store pool;
5351 consequently, it could be overwritten for a subsequent message in the same
5352 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5355 38. Sometimes the final signoff response after QUIT could fail to get
5356 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5357 < 0 before doing a fflush(). This bug looks as though it goes back to the
5358 introduction of TLS in release 3.20, but "sometimes" must have been rare
5359 because the tests only now provoked it.
5365 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5366 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5367 Now it returns an integer. A number of calls were still expecting a T/F
5368 return. Fortuitously, in all cases, the tests worked in OK situations,
5369 which is the norm. However, things would have gone wrong on any write
5370 failures on the smtp file descriptor. This function is used when sending
5371 messages over SMTP and also when doing verify callouts.
5373 2. When Exim is called to do synchronous delivery of a locally submitted
5374 message (the -odf or -odi options), it no longer closes stderr before doing
5377 3. Implemented the mua_wrapper option.
5379 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5381 5. Implemented the functions header_remove(), header_testname(),
5382 header_add_at_position(), and receive_remove_recipient(), and exported them
5385 6. If an ACL "warn" statement specified the addition of headers, Exim already
5386 inserted X-ACL-Warn: at the start if there was no header name. However, it
5387 was not making this test for the second and subsequent header lines if
5388 there were newlines in the string. This meant that an invalid header could
5389 be inserted if Exim was badly configured.
5391 7. Allow an ACL "warn" statement to add header lines at the start or after all
5392 the Received: headers, as well as at the end.
5394 8. Added the rcpt_4xx retry error code.
5396 9. Added postmaster_mailfrom=xxx to callout verification option.
5398 10. Added mailfrom=xxxx to the callout verification option, for verify=
5401 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5402 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5404 12. Inserted some casts to stop certain compilers warning when using pointer
5405 differences as field lengths or precisions in printf-type calls (mostly
5406 affecting debugging statements).
5408 13. Added optional readline() support for -be (dynamically loaded).
5410 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5411 same clock tick as a message's arrival, so that its received time was the
5412 same as the "first fail" time on the retry record, and that message
5413 remained on the queue past the ultimate address timeout, every queue runner
5414 would try a delivery (because it was past the ultimate address timeout) but
5415 after another failure, the ultimate address timeout, which should have then
5416 bounced the address, did not kick in. This was a "< instead of <=" error;
5417 in most cases the first failure would have been in the next clock tick
5418 after the received time, and all would be well.
5420 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5421 being recognized when the domain list was tested by the match_domain
5422 condition in an expansion string.
5424 16. Added the ${str2b64: operator.
5426 17. Exim was always calling setrlimit() to set a large limit for the number of
5427 processes, without checking whether the existing limit was already
5428 adequate. (It did check for the limit on file descriptors.) Furthermore,
5429 errors from getrlimit() and setrlimit() were being ignored. Now they are
5430 logged to the main and panic logs, but Exim does carry on, to try to do its
5431 job under whatever limits there are.
5433 18. Imported PCRE 5.0.
5435 19. Trivial typo in log message " temporarily refused connection" (the leading
5438 20. If the log selector return_path_on_delivery was set and an address was
5439 redirected to /dev/null, the delivery process crashed because it assumed
5440 that a return path would always be set for a "successful" delivery. In this
5441 case, the whole delivery is bypassed as an optimization, and therefore no
5444 21. Internal re-arrangement: the function for sending a challenge and reading
5445 a response while authentication was assuming a zero-terminated challenge
5446 string. It's now changed to take a pointer and a length, to allow for
5447 binary data in such strings.
5449 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5451 23. Exim was not respecting finduser_retries when seeking the login of the
5452 uid under which it was called; it was always trying 10 times. (The default
5453 setting of finduser_retries is zero.) Also, it was sleeping after the final
5454 failure, which is pointless.
5456 24. Implemented tls_on_connect_ports.
5458 25. Implemented acl_smtp_predata.
5460 26. If the domain in control=submission is set empty, Exim assumes that the
5461 authenticated id is a complete email address when it generates From: or
5462 Sender: header lines.
5464 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5465 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5466 chown and chgrp in /bin and hostname in /usr/bin.
5468 28. Exim was keeping the "process log" file open after each use, just as it
5469 does for the main log. This opens the possibility of it remaining open for
5470 long periods when the USR1 signal hits a daemon. Occasional processlog
5471 errors were reported, that could have been caused by this. Anyway, it seems
5472 much more sensible not to leave this file open at all, so that is what now
5475 29. The long-running daemon process does not normally write to the log once it
5476 has entered its main loop, and it closes the log before doing so. This is
5477 so that log files can straightforwardly be renamed and moved. However,
5478 there are a couple of unusual error situations where the daemon does write
5479 log entries, and I had neglected to close the log afterwards.
5481 30. The text of an SMTP error response that was received during a remote
5482 delivery was being truncated at 512 bytes. This is too short for some of
5483 the long messages that one sometimes sees. I've increased the limit to
5486 31. It is now possible to make retry rules that apply only when a message has a
5487 specific sender, in particular, an empty sender.
5489 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5490 it possible to be selective about when SMTP synchronization is enforced.
5492 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5494 32. Implemented hosts_connection_nolog.
5496 33. Added an ACL for QUIT.
5498 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5501 35. Added mailbox_size and mailbox_filecount to appendfile.
5503 36. Added control = no_multiline_responses to ACLs.
5505 37. There was a bug in the logic of the code that waits for the clock to tick
5506 in the case where the clock went backwards by a substantial amount such
5507 that the microsecond fraction of "now" was more than the microsecond
5508 fraction of "then" (but the whole seconds number was less).
5510 38. Added support for the libradius Radius client library this is found on
5511 FreeBSD (previously only the radiusclient library was supported).
5517 1. When certain lookups returned multiple values in the form name=value, the
5518 quoting of the values was not always being done properly. Specifically:
5519 (a) If the value started with a double quote, but contained no whitespace,
5521 (b) If the value contained whitespace other than a space character (i.e.
5522 tabs or newlines or carriage returns) it was not quoted.
5523 This fix has been applied to the mysql and pgsql lookups by writing a
5524 separate quoting function and calling it from the lookup code. The fix
5525 should probably also be applied to nisplus, ibase and oracle lookups, but
5526 since I cannot test any of those, I have not disturbed their existing code.
5528 2. A hit in the callout cache for a specific address caused a log line with no
5529 reason for rejecting RCPT. Now it says "Previous (cached) callout
5530 verification failure".
5532 3. There was an off-by-one bug in the queryprogram router. An over-long
5533 return line was truncated at 256 instead of 255 characters, thereby
5534 overflowing its buffer with the terminating zero. As well as fixing this, I
5535 have increased the buffer size to 1024 (and made a note to document this).
5537 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5538 when Exim is waiting for an SMTP response from a remote server, Exim
5539 restarts its select() call on the socket, thereby resetting its timeout.
5540 This is not a problem when such interrupts are rare. Somebody set up a cron
5541 job to run exiwhat every 2 minutes, which is less than the normal select()
5542 timeout (5 or 10 minutes). This meant that the select() timeout never
5543 kicked in because it was always reset. I have fixed this by comparing the
5544 time when an interrupt arrives with the time at the start of the first call
5545 to select(). If more time than the timeout has elapsed, the interrupt is
5546 treated as a timeout.
5548 5. Some internal re-factoring in preparation for the addition of Sieve
5549 extensions (by MH). In particular, the "personal" test is moved to a
5550 separate function, and given an option for scanning Cc: and Bcc: (which is
5551 not set for Exim filters).
5553 6. When Exim created an email address using the login of the caller as the
5554 local part (e.g. when creating a From: or Sender: header line), it was not
5555 quoting the local part when it contained special characters such as @.
5557 7. Installed new OpenBSD configuration files.
5559 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5560 try to make them clearer.
5562 9. Callout options, other than the timeout value, were being ignored when
5563 verifying sender addresses in header lines. For example, when using
5565 verify = header_sender/callout=no_cache
5567 the cache was (incorrectly) being used.
5569 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5570 only the Cygwin environment.
5572 11. When return_path_on_delivery was set as a log selector, if different remote
5573 addresses in the same message used different return paths and parallel
5574 remote delivery occurred, the wrong values would sometimes be logged.
5575 (Whenever a remote delivery process finished, the return path value from
5576 the most recently started remote delivery process was logged.)
5578 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5579 lines when AUTH and/or TLS are in use. This is the "received protocol"
5580 field. Exim used to use "asmtp" for authenticated SMTP, without any
5581 indication (in the protocol name) for TLS use. Now it follows the RFC and
5582 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5583 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5584 names appear in log lines as well as in Received: header lines.
5586 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5587 extensions, and comparison tests, and to fix some bugs.
5589 14. Changes to the "personal" filter test:
5591 (1) The test was buggy in that it was just doing the equivalent of
5592 "contains" tests on header lines. For example, if a user's address was
5593 anne@some.where, the "personal" test would incorrectly be true for
5595 To: susanne@some.where
5597 This test is now done by extracting each address from the header in turn,
5598 and checking the entire address. Other tests that are part of "personal"
5599 are now done using regular expressions (for example, to check local parts
5600 of addresses in From: header lines).
5602 (2) The list of non-personal local parts in From: addresses has been
5603 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5604 taken from the Sieve specification recommendations.
5606 (3) If the message contains any header line starting with "List-" it is
5607 treated as non-personal.
5609 (4) The test for "circular" in the Subject: header line has been removed
5610 because it now seems ill-conceived.
5612 15. Minor typos in src/EDITME comments corrected.
5614 16. Installed latest exipick from John Jetmore.
5616 17. If headers_add on a router specified a text string that was too long for
5617 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5618 of string_sprintf() is now avoided.
5620 18. $message_body_size was not set (it was always zero) when running the DATA
5621 ACL and the local_scan() function.
5623 19. For the "mail" command in an Exim filter, no default was being set for
5624 the once_repeat time, causing a random time value to be used if "once" was
5625 specified. (If the value happened to be <= 0, no repeat happened.) The
5626 default is now 0s, meaning "never repeat". The "vacation" command was OK
5627 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5628 (I found it when inspecting the code).
5630 20. There is now an overall timeout for performing a callout verification. It
5631 defaults to 4 times the callout timeout, which applies to individual SMTP
5632 commands during the callout. The overall timeout applies when there is more
5633 than one host that can be tried. The timeout is checked before trying the
5634 next host. This prevents very long delays if there are a large number of
5635 hosts and all are timing out (e.g. when the network connections are timing
5636 out). The value of the overall timeout can be changed by specifying an
5637 additional sub-option for "callout", called "maxwait". For example:
5639 verify = sender/callout=5s,maxwait=20s
5641 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5642 to the end before writing, but this should make it even safer).
5644 22. Exim was forgetting that it had advertised PIPELINING for the second and
5645 subsequent messages on an SMTP connection. It was also not resetting its
5646 memory on STARTTLS and an internal HELO.
5648 23. When Exim logs an SMTP synchronization error within a session, it now
5649 records whether PIPELINING has been advertised or not.
5651 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5652 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5653 rather than long int.
5655 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5657 26. Added the never_mail option to autoreply.
5663 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5664 crash if the getsockname() call failed; this can happen if a connection is
5665 closed very soon after it is established. The problem was simply in the
5666 order in which certain operations were done, causing Exim to try to write
5667 to the SMTP stream before it had set up the file descriptor. The bug has
5668 been fixed by making things happen in the correct order.
5674 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5675 before the connection was closed, thus losing the rejection response.
5677 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5678 some early Solaris releases, but causes trouble in current releases where
5679 socklen_t is defined.
5681 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5684 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5687 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5688 that releasing the top of it at the end releases what was used for sub-
5689 expansions (unless the block got too big). However, discard this block if
5690 the first thing is a variable or header, so that we can use its block when
5691 it is dynamic (useful for very large $message_headers, for example).
5693 6. Lookups now cache *every* query, not just the most recent. A new, separate
5694 store pool is used for this. It can be recovered when all lookup caches are
5695 flushed. Lookups now release memory at the end of their result strings.
5696 This has involved some general refactoring of the lookup sources.
5698 7. Some code has been added to the store_xxx() functions to reduce the amount
5699 of flapping under certain conditions.
5701 8. log_incoming_interface used to affect only the <= reception log lines. Now
5702 it causes the local interface and port to be added to several more SMTP log
5703 lines, for example "SMTP connection from", and rejection lines.
5705 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5707 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5709 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5710 could be overwritten at the end of the current message (or the start of a
5711 new message if it was set in a HELO ACL). The value is now preserved for
5712 the duration of the SMTP connection.
5714 12. If a transport had a headers_rewrite setting, and a matching header line
5715 contained an unqualified address, that address was qualified, even if it
5716 did not match any rewriting rules. The underlying bug was that the values
5717 of the flags that permit the existence of unqualified sender and recipient
5718 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5719 non-local messages, and by -bnq for local messages) were not being
5720 preserved with the message after it was received.
5722 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5723 "next input=" as part of the text comprising the host identity instead of
5724 the correct text. The code was using the same buffer for two different
5725 strings. However, depending on which order the printing function evaluated
5726 its arguments, the bug did not always show up. Under Linux, for example, my
5727 test suite worked just fine.
5729 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5730 doesn't work with some older versions of Perl. It has been changed to "my",
5731 which in any case is probably the better facility to use.
5733 15. A really picky compiler found some instances of statements for creating
5734 error messages that either had too many or two few arguments for the format
5737 16. The size of the buffer for calls to the DNS resolver has been increased
5738 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5739 for addresses that have a lot of PTR records. This alleviates a problem; it
5740 does not fully solve it.
5742 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5743 buffer now truncates the list and logs the incident, which is the same
5744 action as happens when Exim is looking up a host name and its aliases.
5745 Previously in this situation something unpredictable would happen;
5746 sometimes it was "internal error: store_reset failed".
5748 18. If a server dropped the connection unexpectedly when an Exim client was
5749 using GnuTLS and trying to read a response, the client delivery process
5750 crashed while trying to generate an error log message.
5752 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5753 string, for example:
5755 warn message = H1: something\nH2: something
5757 the text was added as a single header line from Exim's point of view
5758 though it ended up OK in the delivered message. However, searching for the
5759 second and subsequent header lines using $h_h2: did not work. This has been
5760 fixed. Similarly, if a system filter added multiple headers in this way,
5761 the routers could not see them.
5763 20. Expanded the error message when iplsearch is called with an invalid key to
5764 suggest using net-iplsearch in a host list.
5766 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5767 ACLs are no longer actually imposed (and a message to that effect is
5770 22. If a "gecos" field in a passwd entry contained escaped characters, in
5771 particular, if it contained a \" sequence, Exim got it wrong when building
5772 a From: or a Sender: header from that name. A second bug also caused
5773 incorrect handling when an unquoted " was present following a character
5774 that needed quoting.
5776 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5777 was not being matched caselessly.
5779 24. Arranged for all hyphens in the exim.8 source to be escaped with
5782 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5783 properly. Recipient callout cache records were still being keyed to include
5784 the sender, even when use_sender was set false. This led to far more
5785 callouts that were necessary. The sender is no longer included in the key
5786 when use_sender is false.
5788 26. Added "control = submission" modifier to ACLs.
5790 27. Added the ${base62d: operator to decode base 62 numbers.
5792 28. dnsdb lookups can now access SRV records.
5794 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5795 the configuration file.
5797 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5798 (-v) mode. This makes the output for a verbose queue run more intelligible.
5800 31. Added a use_postmaster feature to recipient callouts.
5802 32. Added the $body_zerocount variable, containing the number of binary zero
5803 bytes in the message body.
5805 33. The time of last modification of the "new" subdirectory is now used as the
5806 "mailbox time last read" when there is a quota error for a maildir
5809 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5811 35. Added +ignore_unknown as a special item in host lists.
5813 36. Code for decoding IPv6 addresses in host lists is now included, even if
5814 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5815 address was recognized as an IP address, but was then not correctly decoded
5816 into binary, causing unexpected and incorrect effects when compared with
5823 1. Very minor rewording of debugging text in manualroute to say "list of
5824 hosts" instead of "hostlist".
5826 2. If verify=header_syntax was set, and a header line with an unqualified
5827 address (no domain) and a large number of spaces between the end of the
5828 name and the colon was received, the reception process suffered a buffer
5829 overflow, and (when I tested it) crashed. This was caused by some obsolete
5830 code that should have been removed. The fix is to remove it!
5832 3. When running in the test harness, delay a bit after writing a bounce
5833 message to get a bit more predictability in the log output.
5835 4. Added a call to search_tidyup() just before forking a reception process. In
5836 theory, someone could use a lookup in the expansion of smtp_accept_max_
5837 per_host which, without the tidyup, could leave open a database connection.
5839 5. Added the variables $recipient_data and $sender_data which get set from a
5840 lookup success in an ACL "recipients" or "senders" condition, or a router
5841 "senders" option, similar to $domain_data and $local_part_data.
5843 6. Moved the writing of debug_print from before to after the "senders" test
5846 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5847 problems for message scanning, either using a data ACL, or using
5848 local_scan() because the Received: header was not generated till after they
5849 were called (in order to set the time as the time of reception completion).
5850 I have revised the way this works. The header is now generated after the
5851 body is received, but before the ACL or local_scan() are called. After they
5852 are run, the timestamp in the header is updated.
5858 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5859 before starting a queue runner without re-exec. This happened only when
5860 deliver_drop_privilege was set or when the Exim user was set to root. The
5861 effect of the bug was that timeouts during subsequent deliveries caused
5862 crashes instead of being properly handled. The handler is now left at its
5863 default (and expected) setting.
5865 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5866 message, again when deliver_drop_privilege is set or Exim is run as root.
5867 The bug described in (1) was not present in this case, but the tidying up
5868 of the other signals was missing. I have made the two cases consistent.
5870 3. The ignore_target_hosts setting on a manualroute router was being ignored
5871 for hosts that were looked up using the /MX notation.
5873 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5876 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5877 operated on the sender address. After changing the $sender_address to <>
5878 for the sender address verify, Exim was re-instated it as the original
5879 (before rewriting) address, but remembering that it had rewritten it, so it
5880 wasn't rewriting it again. This bug also had the effect of breaking the
5881 sender address verification caching when the sender address was rewritten.
5883 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5884 This has been changed so that if the ip literal address matches
5885 ignore_target_hosts, the router declines.
5887 7. Added expansion conditions match_domain, match_address, and match_local_
5888 part (NOT match_host).
5890 8. The placeholder for the Received: header didn't have a length field set.
5892 9. Added code to Exim itself and to exim_lock to test for a specific race
5893 condition that could lead to file corruption when using MBX delivery. The
5894 issue is with the lockfile that is created in /tmp. If this file is removed
5895 after a process has opened it but before that process has acquired a lock,
5896 there is the potential for a second process to recreate the file and also
5897 acquire a lock. This could lead to two Exim processes writing to the file
5898 at the same time. The added code performs the same test as UW imapd; it
5899 checks after acquiring the lock that its file descriptor still refers to
5900 the same named file.
5902 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5903 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5906 11. Added the smtp_active_hostname option. If used, this will typically be made
5907 to depend on the incoming interface address. Because $interface_address is
5908 not set up until the daemon has forked a reception process, error responses
5909 that can happen earlier (such as "too many connections") no longer contain
5912 12. If an expansion in a condition on a "warn" statement fails because a lookup
5913 defers, the "warn" statement is abandoned, and the next ACL statement is
5914 processed. Previously this caused the whole ACL to be aborted.
5916 13. Added the iplsearch lookup type.
5918 14. Added ident_timeout as a log selector.
5920 15. Added tls_certificate_verified as a log selector.
5922 16. Added a global option tls_require_ciphers (compare the smtp transport
5923 option of the same name). This controls incoming TLS connections.
5925 17. I finally figured out how to make tls_require_ciphers do a similar thing
5926 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5927 before starting the TLS session.
5929 18. Tabs are now shown as \t in -bP output.
5931 19. If the log selector return_path_on_delivery was set, Exim crashed when
5932 bouncing a message because it had too many Received: header lines.
5934 20. If two routers both had headers_remove settings, and the first one included
5935 a superfluous trailing colon, the final name in the first list and the
5936 first name in the second list were incorrectly joined into one item (with a
5937 colon in the middle).
5943 1. Added -C and -D options to the exinext utility, mainly to make it easier
5944 to include in the automated testing, but these could be helpful when
5945 multiple configurations are in use.
5947 2. The exinext utility was not formatting the output nicely when there was
5948 an alternate port involved in the retry record key, nor when there was a
5949 message id as well (for retries that were specific to a specific message
5950 and a specific host). It was also confused by IPv6 addresses, because of
5951 the additional colons they contain. I have fixed the IPv4 problem, and
5952 patched it up to do a reasonable job for IPv6.
5954 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5955 delivery, the log line now contains "pipelined" if PIPELINING was used.
5957 4. An SMTP transport process used to panic and die if the bind() call to set
5958 an explicit outgoing interface failed. This has been changed; it is now
5959 treated in the same way as a connect() failure.
5961 5. A reference to $sender_host_name in the part of a conditional expansion
5962 that was being skipped was still causing a DNS lookup. This no longer
5965 6. The def: expansion condition was not recognizing references to header lines
5966 that used bh_ and bheader_.
5968 7. Added the _cache feature to named lists.
5970 8. The code for checking quota_filecount in the appendfile transport was
5971 allowing one more file than it should have been.
5973 9. For compatibility with Sendmail, the command line option
5981 and sets the incoming protocol and host name (for trusted callers). The
5982 host name and its colon can be omitted when only the protocol is to be set.
5983 Note the Exim already has two private options, -pd and -ps, that refer to
5984 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5985 "s", but I don't think that's a major issue.
5987 10. A number of refactoring changes to the code, none of which should affect
5990 (a) The number of logging options was getting close to filling up the
5991 32-bit word that was used as a bit map. I have split them into two classes:
5992 those that are passed in the argument to log_write(), and those that are
5993 only ever tested independently outside of that function. These are now in
5994 separate 32-bit words, so there is plenty of room for expansion again.
5995 There is no change in the user interface or the logging behaviour.
5997 (b) When building, for example, log lines, the code previously used a
5998 macro that called string_cat() twice, in order to add two strings. This is
5999 not really sufficiently general. Furthermore, there was one instance where
6000 it was actually wrong because one of the argument was used twice, and in
6001 one call a function was used. (As it happened, calling the function twice
6002 did not affect the overall behaviour.) The macro has been replaced by a
6003 function that can join an arbitrary number of extra strings onto a growing
6006 (c) The code for expansion conditions now uses a table and a binary chop
6007 instead of a serial search (which was left over from when there were very
6008 few conditions). Also, it now recognizes conditions like "pam" even when
6009 the relevant support is not compiled in: a suitably worded error message is
6010 given if an attempt is made to use such a condition.
6012 11. Added ${time_interval:xxxxx}.
6014 12. A bug was causing one of the ddress fields not to be passed back correctly
6015 from remote delivery subprocesses. The field in question was not being
6016 subsequently used, so this caused to problems in practice.
6018 13. Added new log selectors queue_time and deliver_time.
6020 14. Might have fixed a bug in maildirsizefile handling that threw up
6021 "unexpected character" debug warnings, and recalculated the data
6022 unnecessarily. In any case, I expanded the warning message to give more
6025 15. Added the message "Restricted characters in address" to the statements in
6026 the default ACL that block characters like @ and % in local parts.
6028 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6029 Three changes have been made:
6031 (a) There was a serious bug; a negative response to MAIL caused the whole
6032 recipient domain to be cached as invalid, thereby blocking all messages
6033 to all local parts at the same domain, from all senders. This bug has
6034 been fixed. The domain is no longer cached after a negative response to
6035 MAIL if the sender used is not empty.
6037 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6040 (c) A new callout option, "use_sender" has been added for people who want
6041 the modified behaviour.
6047 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6050 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6051 indeed breaks things for older releases.
6053 3. Added additional logging to the case where there is a problem reading data
6054 from a filter that is running in a subprocess using a pipe, in order to
6055 try to track down a specific problem.
6057 4. Testing facility fudge: when running in the test harness and attempting
6058 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6059 getting "No route to host". Convert this to a timeout.
6061 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6064 6. Some OS don't have socklen_t but use size_t instead. This affects the
6065 fifth argument of getsockopt() amongst other things. This is now
6066 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6067 can be set for individual OS. I have set it for SunOS5, OSF1, and
6068 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6069 some earlier ones do not.
6071 7. Change 4.30/15 was not doing the test caselessly.
6073 8. The standard form for an IPv6 address literal was being rejected by address
6074 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6075 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6076 this, as well as the form without the "IPv6" on the front (but only when
6077 address literals are enabled, of course).
6079 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6081 10. Exim crashed if a message with an empty sender address specified by -f
6082 encountered a router with an errors_to setting. This could be provoked only
6083 by a command such as
6087 where an empty string was supplied; "<>" did not hit this bug.
6089 11. Installed PCRE release 4.5.
6091 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6092 remained set. It is now erased.
6094 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6095 times from message ids (which are base 36 rather than the normal 62).
6097 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6098 were being counted as actual protocol errors, and logged if the log
6099 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6100 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6101 and DATA following a set of rejected RCPTs do not count as protocol errors.
6102 In other words, Exim assumes they were pipelined, though this may not
6103 actually be the case. Of course, in all cases the client gets an
6104 appropriate error code.
6106 15. If a lookup fails in an ACL condition, a message about the failure may
6107 be available; it is used if testing the ACL cannot continue, because most
6108 such messages specify what the cause of the deferral is. However, some
6109 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6110 that caused an old message to be retained and used if a later statement
6111 caused a defer, replacing the real cause of the deferral.
6113 16. If an IP address had so many PTR records that the DNS lookup buffer
6114 was not large enough to hold them, Exim could crash while trying to process
6115 the truncated data. It now detects and logs this case.
6117 17. Further to 4.21/58, another change has been made: if (and only if) the
6118 first line of a message (the first header line) ends with CRLF, a bare LF
6119 in a subsequent header line has a space inserted after it, so as not to
6120 terminate the header.
6122 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6123 unnecessarily, used atoi() instead of strtol(), and didn't check the
6124 termination when getting file sizes from file names by regex.
6126 19. Completely re-implemented the support for maildirsize files, in the light
6127 of a number of problems with the previous contributed implementation
6128 (4.30/29). In particular:
6130 . If the quota is zero, the maildirsize file is maintained, but no quota is
6133 . If the maildir directory does not exist, it is created before any attempt
6134 to write a maildirsize file.
6136 . The quota value in the file is just a cache; if the quota is changed in
6137 the transport, the new value overrides.
6139 . A regular expression is available for excluding directories from the
6142 20. The autoreply transport checks the characters in options that define the
6143 message's headers; it allows continued headers, but it was checking with
6144 isspace() after an embedded newline instead of explicitly looking for a
6147 21. If all the "regular" hosts to which an address was routed had passed their
6148 expiry times, and had not reached their retry times, the address was
6149 bounced, even if fallback hosts were defined. Now Exim should go on to try
6152 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6153 equivalent code in the SMTP transport. Some hosts send humungous responses
6154 to HELO/EHLO, more than 1024 it seems.
6156 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6157 gives compiler warnings in some environments. I've now done it "properly",
6160 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6161 (because of problems with the built-in one) was declared to return uschar *
6162 instead of char *, causing compiler failure.
6164 25. Fixed a file descriptor leak when processing alias/forward files.
6166 26. Fixed a minor format string issue in dbfn.c.
6168 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6170 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6171 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6174 29. When a sender address is verified, it is cached, to save repeating the test
6175 when there is more than one recipient in a message. However, when the
6176 verification involves a callout, it is possible for different callout
6177 options to be set for different recipients. It is too complicated to keep
6178 track of this in the cache, so now Exim always runs a verification when a
6179 callout is required, relying on the callout cache for the optimization.
6180 The overhead is duplication of the address routing, but this should not be
6183 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6184 to be verified with callout=postmaster, and the main callout worked but the
6185 postmaster check failed, the verification correctly failed. However, if a
6186 subsequent RCPT command asked for sender verification *without* the
6187 postmaster check, incorrect caching caused this verification also to fail,
6190 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6191 it was not caching the DNS options (qualify_single, search_parents) that
6192 were used when the lookup failed. A subsequent lookup with different
6193 options therefore always gave the same answer, though there were cases
6194 where it should not have. (Example: a "domains = !$mx_any" option on a
6195 dnslookup router: the "domains" option is always processed without any
6196 widening, but the router might have qualify_single set.) Now Exim uses the
6197 cached value only when the same options are set.
6199 32. Added John Jetmore's "exipick" utility to the distribution.
6201 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6202 than a timeout (e.g. a certificate is required, and is not provided), an
6203 Exim server now closes the connection immediately. Previously it waited for
6204 the client to close - but if the client is SSL, it seems that they each
6205 wait for each other, leading to a delay before one of them times out.
6207 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6208 maintained 0.8.x compatibility because I don't think many are using it, and
6209 it is clearly obsolete.
6211 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6214 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6215 client certificate was expired. A simple patch fixes this, though I don't
6216 understand the full logic of why the verify callback is called multiple
6219 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6220 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6221 which causes problems with some clients (such as the Certicom SSL Plus
6222 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6223 disables the coutermeasure allowing Eudora to connect."
6225 38. Exim was not checking that a write() to a log file succeeded. This could
6226 lead to Bad Things if a log got too big, in particular if it hit a file
6227 size limit. Exim now panics and dies if it cannot write to a log file, just
6228 as it does if it cannot open a log file.
6230 39. Modified OS/Makefile-Linux so that it now contains
6232 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6234 The two -D definitions ensure that Exim is compiled with large file
6235 support, which makes it possible to handle log files that are bigger than
6238 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6239 instance) a domain was checked against a named list that involved a lookup,
6240 causing $domain_data to be set, then another domain was checked against the
6241 same list, then the first domain was re-checked, the value of $domain_data
6242 after the final check could be wrong. In particular, if the second check
6243 failed, it could be set empty. This bug probably also applied to
6246 41. The strip_trailing_dot option was not being applied to the address given
6247 with the -f command-line option.
6249 42. The code for reading a message's header from the spool was incrementing
6250 $received_count, but never initializing it. This meant that the value was
6251 incorrect (doubled) while delivering a message in the same process in which
6252 it was received. In the most common configuration of Exim, this never
6253 happens - a fresh exec is done - but it can happen when
6254 deliver_drop_privilege is set.
6256 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6257 it now includes up to 150 characters of the unexpected data in the log
6260 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6261 and building data strings. The size of both of these buffers was 10 000
6262 bytes - far larger than anybody would *ever* want, thought I. Needless to
6263 say, somebody hit the limit. I have increased the maximum line length to
6264 20 000 and the maximum data length of concatenated lines to 100 000. I have
6265 also fixed two bugs, because there was no checking on these buffers. Tsk,
6266 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6267 buffer is too small.
6269 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6270 lsearch lookups. Now it does.
6272 46. When parsing a route_list item in a manualroute router, a fixed-length
6273 buffer was used for the list of hosts. I made this 1024 bytes long,
6274 thinking that nobody would ever have a list of hosts that long. Wrong.
6275 Somebody had a whole pile of complicated expansion conditions, and the
6276 string was silently truncated, leading to an expansion error. It turns out
6277 that it is easier to change to an unlimited length (owing to other changes
6278 that have happened since this code was originally written) than to build
6279 structure for giving a limitation error. The length of the item that
6280 expands into the list of hosts is now unlimited.
6282 47. The lsearch lookup could not handle data where the length of text line was
6283 more than 4095 characters. Such lines were truncated, leading to shortened
6284 data being returned. It should now handle lines of any length.
6286 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6287 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6290 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6291 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6292 no longer happens in comment lines. A list of replacements is now placed
6293 at the head of all of the source files, except those whose only change is
6294 to replace PERL_COMMAND in the very first #! line.
6296 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6297 messages on the queue, with a bottom-up merge sort, using code contributed
6298 by Michael Haardt. This should make operations like -bp somewhat faster on
6299 large queues. It won't affect queue runners, except when queue_run_in_order
6302 51. Installed eximstats 1.31 in the distribution.
6304 52. Added support for SRV lookups to the dnslookup router.
6306 53. If an ACL referred to $message_body or $message_body_end, the value was not
6307 reset for any messages that followed in the same SMTP session.
6309 54. The store-handling optimization for building very long strings was not
6310 differentiating between the different store pools. I don't think this
6311 actually made any difference in practice, but I've tidied it.
6313 55. While running the routers to verify a sender address, $sender_address
6314 was still set to the sender address. This is wrong, because when routing to
6315 send a bounce to the sender, it would be empty. Therefore, I have changed
6316 it so that, while verifying a sender address, $sender_address is set to <>.
6317 (There is no change to what happens when verifying a recipient address.)
6319 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6320 target A or AAAA records (if not already returned) without resetting the
6321 qualify_single or search_parents options of the DNS resolver. These are
6322 inappropriate in this case because the targets of MX and SRV records must
6323 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6324 target that, when qualified, matched something in the local domain. These
6325 two options are now turned off when doing these lookups.
6327 57. It seems that at least some releases of Reiserfs (which does not have the
6328 concept of a fixed number of inodes) returns zero and not -1 for the
6329 number of available inodes. This interacted badly with check_spool_inodes,
6330 which assumed that -1 was the "no such thing" setting. What I have done is
6331 to check that the total number of inodes is greater than zero before doing
6332 the test of how many are available.
6334 58. When a "warn" ACL statement has a log_message modifier, the message is
6335 remembered, and not repeated. This is to avoid a lot of repetition when a
6336 message has many recipients that cause the same warning to be written.
6337 However, Exim was preserving the list of already written lines for an
6338 entire SMTP session, which doesn't seem right. The memory is now reset if a
6339 new message is started.
6341 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6342 debugging output unless log_rewrite was also set.
6344 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6345 of (int)(handle) when we know that handle contains (void *)(-1).
6347 61. The Exim daemon panic-logs an error return when it closes the incoming
6348 connection. However "connection reset by peer" seems to be common, and
6349 isn't really an error worthy of noting specially, so that particular error
6352 62. When Exim is trying to find all the local interfaces, it used to panic and
6353 die if the ioctl to get the interface flags failed. However, it seems that
6354 on at least one OS (Solaris 9) it is possible to have an interface that is
6355 included in the list of interfaces, but for which you get a failure error
6356 for this call. This happens when the interface is not "plumbed" into a
6357 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6358 failure of the "get flags" call assumes that the interface is down.
6360 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6361 makes life easier for people who are doing arithmetic on fields extracted
6362 from dates, where you often get leading zeros that should not be
6363 interpreted as octal.
6365 64. Added qualify_domain to the redirect router, to override the global
6368 65. If a pathologically long header line contained very many addresses (the
6369 report of this problem mentioned 10 000) and each of them was rewritten,
6370 Exim could use up a very large amount of memory. (It kept on making new
6371 copies of the header line as it rewrote, and never released the old ones.)
6372 At the expense of a bit more processing, the header rewriting function has
6373 been changed so that it no longer eats memory in this way.
6375 66. The generation of the Received: header has been moved from the time that a
6376 message starts to be received, to the time that it finishes. The timestamp
6377 in the Received: header should now be very close to that of the <= log
6378 line. There are two side-effects of this change:
6380 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6381 logged header lines no longer include the local Received: line, because
6382 it has not yet been created. The same applies to a copy of the message
6383 that is returned to a non-SMTP sender when a message is rejected.
6385 (b) When a filter file is tested using -bf, no additional Received: header
6386 is added to the test message. After some thought, I decided that this
6389 This change does not affect the value of $received_for. It is still set
6390 after address rewriting, but before local_scan() is called.
6392 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6394 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6395 gave an unhelpful panic error message, and a defer error. I have managed to
6396 change this behaviour so that it now rejects any supplied certificate,
6397 which seems right, as the list of acceptable certificates is empty.
6399 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6400 gave an unhelpful defer error. I have not managed to make this reject any
6401 supplied certificates, but the error message it gives is "no certificate
6402 supplied", which is not helpful.
6404 70. exigrep's output now also includes lines that are not associated with any
6405 message, but which match the given pattern. Implemented by a patch from
6406 Martin Sluka, which also tidied up the Perl a bit.
6408 71. Recipient callout verification, like sender verification, was using <> in
6409 the MAIL FROM command. This isn't really the right thing, since the actual
6410 sender may affect whether the remote host accepts the recipient or not. I
6411 have changed it to use the actual sender in the callout; this means that
6412 the cache record is now keyed on a recipient/sender pair, not just the
6413 recipient address. There doesn't seem to be a real danger of callout loops,
6414 since a callout by the remote host to check the sender would use <>.
6415 [SEE ABOVE: changed after hitting problems.]
6417 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6418 temporary errors. However, in the case of such a code being given after
6419 the end of a data transmission (i.e. after ".") Exim was failing to write
6420 a retry record for the message. (Yes, there was some broken host that was
6421 actually sending 8xx at this point.)
6423 73. An unknown lookup type in a host list could cause Exim to panic-die when
6424 the list was checked. (An example that provoked this was putting <; in the
6425 middle of a list instead of at the start.) If this happened during a DATA
6426 ACL check, a -D file could be left lying around. This kind of configuration
6427 error no longer causes Exim to die; instead it causes a defer error. The
6428 incident is still logged to the main and panic logs.
6430 74. Buglet left over from Exim 3 conversion. The message "too many messages
6431 in one connection" was written to the rejectlog but not the mainlog, except
6432 when address rewriting (yes!) was being logged.
6434 75. Added write_rejectlog option.
6436 76. When a system filter was run not as root (that is, when system_filter_user
6437 was set), the values of the $n variables were not being returned to the
6438 main process; thus, they were not subsequently available in the $sn
6441 77. Added +return_path_on_delivery log selector.
6443 78. A connection timeout was being treated differently from recipients deferred
6444 when testing hosts_max_try with a message that was older than the host's
6445 retry timeout. (The host should not be counted, thus allowing all hosts to
6446 be tried at least once before bouncing.) This may have been the cause of an
6447 occasionally reported bug whereby a message would remain on the queue
6448 longer than the retry timeout, but would be bounced if a delivery was
6449 forced. I say "may" because I never totally pinned down the problem;
6450 setting up timeout/retry tests is difficult. See also the next item.
6452 79. The ultimate address timeout was not being applied to errors that involved
6453 a combination of host plus message (for example, a timeout on a MAIL
6454 command). When an address resolved to a number of possible hosts, and they
6455 were not all tried for each delivery (e.g. because of hosts_max_try), a
6456 message could remain on the queue longer than the retry timeout.
6458 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6461 81. Fixed an obscure SMTP outgoing bug which required at least the following
6462 conditions: (a) there was another message waiting for the same server;
6463 (b) the server returned 5xx to all RCPT commands in the first message so
6464 that the message was not completed; (c) the server dropped the connection
6465 or gave a negative response to the RSET that Exim sends to abort the
6466 transaction. The observed case was a dropped connection after DATA that had
6467 been sent in pipelining mode. That is, the server had advertised PIPELINING
6468 but was not implementing it correctly. The effect of the bug was incorrect
6469 behaviour, such as trying another host, and this could lead to a crash.
6475 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6476 and daemon.c were passed as pointers to ints; they should have been
6477 pointers to socklen_t variables (which are typically unsigned ints).
6479 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6482 3. Fixed a really odd bug that affected only the testing scheme; patching a
6483 certain fixed string in the binary changed the value of another string that
6484 happened to be identical to the end of the original first string.
6486 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6487 name", it returns that address as the IP address. On some operating
6488 systems (e.g. Solaris), it also passes back the IP address string as the
6489 "host name". However, on others (e.g. Linux), it passes back an empty
6490 string. Exim wasn't checking for this, and was changing the host name to an
6491 empty string, assuming it had been canonicalized.
6493 5. Although rare, it is permitted to have more than one PTR record for a given
6494 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6495 all the names associated with an address, because they do in Solaris.
6496 However, it seems that they do not in Linux for data that comes from the
6497 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6498 I found this out when I moved to a new Linux workstation and tried to run
6499 the Exim test suite.
6501 To get round this problem I have changed the code so that it now does its
6502 own call to the DNS to look up PTR records when searching for a host name.
6503 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6504 addresses that are only in /etc/hosts are still found.
6506 This behaviour is, however, controlled by an option called host_lookup_
6507 order, which defaults to "bydns:byaddr". If people want to use the other
6508 order, or indeed, just use one or the other means of lookup, they can
6509 specify it in this variable.
6511 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6512 some operating systems, this comes back from gethostbyaddr() as an empty
6513 string, and this is what Exim used to test for. However, it seems that in
6514 other systems, "." is yielded. Exim now tests for this case too.
6516 7. The values of check_spool_space and check_log_space are now held internally
6517 as a number of kilobytes instead of an absolute number of bytes. If a
6518 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6519 kilobyte. This means that much larger values can be stored.
6521 8. Exim monitor: an attempt to get the action menu when not actually pointing
6522 at a message produces an empty menu entitled "No message selected". This
6523 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6524 no entries in it ("Shell widget menu has zero width and/or height"). So I
6525 have added a single, blank menu entry in this case.
6527 9. Added ${quote_local_part.
6529 10. MIME decoding is now applied to the contents of Subject: header lines when
6532 11. Now that a reference to $sender_host_address automatically causes a reverse
6533 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6534 host lookup before query-style lookups in lists that might use this
6535 variable. This has therefore been abolished, and the "net-" prefix is no
6536 longer necessary for query-style lookups.
6538 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6539 have been a typo for LFLAGS, so it has been changed.
6541 13. The install script calls Exim with "-C /dev/null" in order to find the
6542 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6543 to be output. However, since Exim outputs its version number before the
6544 error, it didn't break the script. It just looked ugly. I fixed this by
6545 always allowing "-C /dev/null" if the caller is root.
6547 14. Ignore overlarge ACL variable number when reading spool file - insurance
6548 against a later release with more variables having written the file.
6550 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6551 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6552 this, as well as the form without the "IPv6" on the front.
6554 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6555 OS/Makefile-Darwin file.
6557 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6558 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6560 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6561 variable. However, some OS use ints for inodes. I've added cast to long int
6562 to get rid of the compiler warning.
6564 19. I had forgotten to lock out "/../" in configuration file names when
6565 ALT_CONFIG_PREFIX was set.
6567 20. Routers used for verification do not need to specify transports. However,
6568 if such a router generated a host list, and callout was configured, Exim
6569 crashed, because it could not find a port number from the (non-existent)
6570 transport. It now assumes port 25 in this circumstance.
6572 21. Added the -t option to exigrep.
6574 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6575 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6576 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6577 them is set, LOOKUP_LSEARCH is forced.
6579 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6581 24. Added sender and host information to the "rejected by local_scan()" log
6582 line; previously there was no indication of these.
6584 25. Added .include_if_exists.
6586 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6587 Linux. It turns out that not all file systems support this. Apparently some
6588 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6589 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6590 not supported on the file descriptor, is now ignored when Exim is trying to
6591 sync a directory. This applies only to Linux.
6593 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6595 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6596 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6599 29. Added support for maildirsize files from supplied patch (modified a bit).
6601 30. The use of :fail: followed by an empty string could lead Exim to respond to
6602 sender verification failures with (e.g.):
6604 550 Verification failed for <xxx>
6605 550 Sender verify failed
6607 where the first response line was missing the '-' that indicates it is not
6608 the final line of the response.
6610 31. The loop for finding the name of the user that called Exim had a hardwired
6611 limit of 10; it now uses the value of finduser_retries, which is used for
6612 all other user lookups.
6614 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6617 33. Exim was neglecting to zero errno before one call of strtol() when
6618 expanding a string and expecting an integer value. On some systems this
6619 resulted in spurious "integer overflow" errors. Also, it was casting the
6620 result into an int without checking.
6622 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6623 did not work. The code looks as if it has *never* worked, though it appears
6624 to have been documented since at least release 1.62. I have made it work.
6626 35. The "timeout_DNS" error in retry rules, also documented since at least
6627 1.62, also never worked. As it isn't clear exactly what this means, and
6628 clearly it isn't a major issue, I have abolished the feature by treating it
6629 as "timeout", and writing a warning to the main and panic logs.
6631 36. The display of retry rules for -brt wasn't always showing the error code
6634 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6635 timeout_connect_A, timeout_connect_MX.
6637 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6638 to the empty sender.
6640 39. The daemon was not analysing the content of -oX till after it had closed
6641 stderr and disconnected from the controlling terminal. This meant that any
6642 syntax errors were only noted on the panic log, and the return code from
6643 the command was 0. By re-arranging the code a little, I've made the
6644 decoding happen first, so such errors now appear on stderr, and the return
6645 code is 1. However, the actual setting up of the sockets still happens in
6646 the disconnected process, so errors there are still only recorded on the
6649 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6650 connections (as happens on some IP stacks) was logged at start up time as
6651 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6652 it from "IPv6 and IPv4", which means that two separate sockets are being
6655 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6656 says whether AF_INET or AF_INET6 was passed as an argument.
6658 42. Exiwhat output was messed up when time zones were included in log
6661 43. Exiwhat now gives more information about the daemon's listening ports,
6662 and whether -tls-on-connect was used.
6664 44. The "port" option of the smtp transport is now expanded.
6666 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6667 silently ignored. Now an error message is written to the main and panic
6670 46. There's a new ACL modifier called "logwrite" which writes to a log file
6671 as soon as it is encountered.
6673 47. Added $local_user_uid and $local_user_gid at routing time.
6675 48. Exim crashed when trying to verify a sender address that was being
6678 49. Exim was recognizing only a space character after ".include". It now also
6679 recognizes a tab character.
6681 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6682 extracting the relevant information from the specification. The man page no
6683 longer contains scrambled data for the -d option, and I've added a section
6684 at the front about calling Exim under different names.
6686 51. Added "extra_headers" argument to the "mail" command in filter files.
6688 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6691 53. Installed eximstats 1.29.
6693 54. Added transport_filter_timeout as a generic transport option.
6695 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6696 Cc: header lines. This was required by RFC 822, but it not required by RFC
6699 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6700 incoming messages that did not have them. Now it does so only if the
6701 message originates locally, that is, if there is no associated remote host
6702 address. When Resent- header lines are present, this applies to the Resent-
6703 lines rather than the non-Resent- lines.
6705 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6706 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6708 58. Messages for configuration errors now include the name of the main
6709 configuration file - useful now that there may be more than one file in a
6710 list (.included file names were always shown).
6712 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6713 for those rare installations that do not start the daemon as root or run it
6714 setuid root. I've cut out the call to initgroups() if the daemon is not
6717 60. The Exim user and group can now be bound into the binary as text strings
6718 that are looked up at the start of Exim's processing.
6720 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6722 62. Added $mailstore_basename variable.
6724 63. Installed patch to sieve.c from Michael Haardt.
6726 64. When Exim failed to open the panic log after failing to open the main log,
6727 the original message it was trying to log was written to stderr and debug
6728 output, but if they were not available (the usual case in production), it
6729 was lost. Now it is written to syslog before the two lines that record the
6730 failures to open the logs.
6732 65. Users' Exim filters run in subprocesses under the user's uid. It is
6733 possible for a "deliver" command or an alias in a "personal" command to
6734 provoke an address rewrite. If logging of address rewriting is configured,
6735 this fails because the process is not running as root or exim. There may be
6736 a better way of dealing with this, but for the moment (because 4.30 needs
6737 to be released), I have disabled address rewrite logging when running a
6738 filter in a non-root, non-exim process.
6744 1. The buildconfig auxiliary program wasn't quoting the value set for
6745 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6746 not defined. This bug was masked in 4.22 by the effect that was fixed in
6749 2. Some messages that were rejected after a message id was allocated were
6750 shown as "incomplete" by exigrep. It no longer does this for messages that
6751 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6753 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6754 have allow_domain_literals set, the ID did not get logged in the <= line.
6755 Domain literals are now always recognized in Message-ID: header lines.
6757 4. The first argument for a ${extract expansion item is the key name or field
6758 number. Leading and trailing spaces in this item were not being ignored,
6759 causing some misleading effects.
6761 5. When deliver_drop_privilege was set, single queue runner processes started
6762 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6763 same command in the process it spins off) were not dropping privilege.
6765 6. When the daemon running as "exim" started a queue runner, it always
6766 re-executed Exim in the spun-off process. This is a waste of effort when
6767 deliver_drop_privilege is set. The new process now just calls the
6768 queue-runner function directly.
6774 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6777 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6778 ignored. Though the use of -oP was forcing the writing of a pid file, it
6779 was always written to the default place.
6781 3. If the message "no IP address found for host xxxx" is generated during
6782 incoming verification, it is now followed by identification of the incoming
6783 connection (so you can more easily find what provoked it).
6785 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6787 5. Added some features to "harden" Exim a bit more against certain attacks:
6789 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6790 be put in Local/Makefile. This is like the never_users runtime option,
6791 but it cannot be overridden. The default setting is "root".
6793 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6794 prefix string with which any file named in a -C command line option
6797 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6798 is retained for -C and -D only if the caller of Exim is root. Without
6799 it, the exim user may also use -C and -D and retain privilege.
6801 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6802 command line option is disabled.
6804 6. Macro names set by the -D option must start with an upper case letter, just
6805 like macro names defined in the configuration file.
6807 7. Added "dereference=" facility to LDAP.
6809 8. Two instances of the typo "uknown" in the source files are fixed.
6811 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6812 the Configure-Makefile script screwed up while processing it.
6814 10. Incorporated PCRE 4.4.
6816 11. The SMTP synchronization check was not operating right at the start of an
6817 SMTP session. For example, it could not catch a HELO sent before the client
6818 waited for the greeting. There is now a check for outstanding input at the
6819 point when the greeting is written. Because of the duplex, asynchronous
6820 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6821 way, but not yet received, when the check is performed.
6823 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6824 on TCP/IP sockets, because this apparently causes some broken clients to
6827 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6828 unchanged) from the Cygwin maintainer.
6830 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6831 was supported instead of testing for mbx. Effectively a typo.
6833 15. The spa authenticator server code was not checking that the input it
6834 received was valid base64.
6836 16. The debug output line for the "set" modifier in ACLs was not showing the
6837 name of the variable that was being set.
6839 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6841 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6842 lookup on its own. Something else was needed to trigger the lookup. For
6843 example, a match in host_lookup or the need for a host name in a host list.
6844 Now, if $sender_host_name is referenced and the host name has not yet been
6845 looked up, a lookup is performed. If the lookup fails, the variable remains
6846 empty, and $host_lookup_failed is set to "1".
6848 19. Added "eqi" as a case-independent comparison operator.
6850 20. The saslauthd authentication condition could segfault if neither service
6851 nor realm was specified.
6853 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6854 error message that was logged was misleading, and incoming SMTP
6855 connections were dropped. The message is now more accurate, and temporary
6856 errors are given to SMTP connections.
6858 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6859 (except RSET) with a 421 error, until QUIT is received. However, it was
6860 failing to send a response to QUIT.
6862 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6863 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6864 ACL is now run after the helo_try_verify_hosts code.
6866 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6867 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6868 case-independent, so other case variants are also recognized). Apparently
6869 some systems use these upper case variants.
6871 25. If more than two messages were waiting for the same host, and a transport
6872 filter was specified for the transport, Exim sent two messages over the
6873 same TCP/IP connection, and then failed with "socket operation on non-
6874 socket" when it tried to send the third.
6876 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6878 27. The extern definition of crypt16() in expand.c was not being excluded when
6879 the OS had its own crypt16() function.
6881 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6882 as a preferred synonym for return_size_limit, both as an option and as an
6885 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6887 30. Changed the default configuration ACL to relax the local part checking rule
6888 for addresses that are not in any local domains. For these addresses,
6889 slashes and pipe symbols are allowed within local parts, but the sequence
6890 /../ is explicitly forbidden.
6892 31. SPA server authentication was not clearing the challenge buffer before
6895 32. log_message in a "warn" ACL statement was writing to the reject log as
6896 well as to the main log, which contradicts the documentation and doesn't
6897 seem right (because no rejection is happening). So I have stopped it.
6899 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6900 However, I am unable to do any testing of this.
6902 34. Fixed an infelicity in the appendfile transport. When checking directories
6903 for a mailbox, to see if any needed to be created, it was accidentally
6904 using path names with one or more superfluous leading slashes; tracing
6905 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6907 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6908 contents are added to the log line that is written for every discarded
6909 recipient. (Previously a log_message setting was ignored.)
6911 36. The ${quote: operator now quotes the string if it is empty.
6913 37. The install script runs exim in order to find its version number. If for
6914 some reason other than non-existence or emptiness, which it checks, it
6915 could not run './exim', it was installing it with an empty version number,
6916 i.e. as "exim-". This error state is now caught, and the installation is
6919 38. An argument was missing from the function that creates an error message
6920 when Exim fails to connect to the socket for saslauthd authentication.
6921 This could cause Exim to crash, or give a corrupted message.
6923 39. Added isip, isip4, and isip6 to ${if conditions.
6925 40. The ACL variables $acl_xx are now saved with the message, and can be
6926 accessed later in routers, transports, and filters.
6928 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6929 strings in the file are not string-expanded.
6931 42. If a MAIL command specified a SIZE value that was too large to fit into an
6932 int variable, the check against message_size_limit failed. Such values are
6933 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6934 day this will have to be increased, but I don't think I want to be around
6935 when emails are that large.
6942 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6943 iconv() is not standard in FreeBSD.
6945 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6946 IPv6 enabled. The observed symptom was a segmentation fault on return from
6947 the function os_common_find_running_interfaces() in src/os.c.
6949 3. In the check_special_case() function in daemon.c I had used "errno" as an
6950 argument name, which causes warnings on some systems. This was basically a
6951 typo, since it was named "eno" in the comments!
6953 4. The code that waits for the clock to tick (at a resolution of some fraction
6954 of a second) so as to ensure message-id uniqueness was always waiting for
6955 at least one whole tick, when it could have waited for less. [This is
6956 almost certainly not relevant at current processor speeds, where it is
6957 unlikely to ever wait at all. But we try to future-proof.]
6959 5. The function that sleeps for a time interval that includes fractions of a
6960 second contained a race. It did not block SIGALRM between setting the
6961 timer, and suspending (a couple of lines later). If the interval was short
6962 and the sigsuspend() was delayed until after it had expired, the suspension
6963 never ended. On busy systems this could lead to processes getting stuck for
6966 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6967 process, before it forks any delivery processes. The open lookup caching
6968 mechanism meant that the open file or database connection was passed into
6969 the delivery process. The problem was that delivery processes always tidy
6970 up cached lookup data. This could cause a problem for the next delivery
6971 process started by the queue runner, because the external queue runner
6972 process does not know about the closure. So the next delivery process
6973 still has data in the lookup cache. In the case of a file lookup, there was
6974 no problem because closing a file descriptor in a subprocess doesn't affect
6975 the parent. However, if the lookup was caching a connection to a database,
6976 the connection was closed, and the second delivery process was likely to
6977 see errors such as "PGSQL: query failed: server closed the connection
6978 unexpectedly". The problem has been fixed by closing all cached lookups
6979 in a queue runner before running a delivery process.
6981 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6982 seem to have the "const" qualifier which it has on other OS. I've
6985 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6986 *of the same type* (client or server) with the same public name that an
6987 error should be diagnosed.
6989 9. When Exim looked up a host name for an IP address, but failed to find the
6990 original IP address when looking up the host name (a safety check), it
6991 output the message "<ip address> does not match any IP for NULL", which was
6992 confusing, to say the least. The bug was that the host name should have
6993 appeared instead of "NULL".
6995 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6996 user that is built into the binary, and the -C or -D options is used, root
6997 privilege is dropped before the configuration file is read. In addition,
6998 logging is switched to stderr instead of the normal log files. If the
6999 configuration then re-defines the Exim user, the unprivileged environment
7000 is probably not what is expected, so Exim logs a panic warning message (but
7003 However, if deliver_drop_privilege is set, the unprivileged state may well
7004 be exactly what is intended, so the warning has been cut out in that case,
7005 and Exim is allowed to try to write to its normal log files.
7011 1. smtp_return_error_details was not giving details for temporary sender
7012 or receiver verification errors.
7014 2. Diagnose a configuration error if two authenticators have the same public
7017 3. Exim used not to create the message log file for a message until the first
7018 delivery attempt. This could be confusing when incoming messages were held
7019 for policy or load reasons. The message log file is now created at the time
7020 the message is received, and an initial "Received" line is written to it.
7022 4. The automatically generated man page for command line options had a minor
7023 bug that caused no ill effects; however, a more serious problem was that
7024 the procedure for building the man page automatically didn't always
7025 operate. Consequently, release 4.20 contains an out-of-date version. This
7026 shouldn't happen again.
7028 5. When building Exim with embedded Perl support, the script that builds the
7029 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7030 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7032 6. The freeze_tell option was not being used for messages that were frozen on
7033 arrival, either by an ACL or by local_scan().
7035 7. Added the smtp_incomplete_transaction log selector.
7037 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7038 was accepting AUTH without a new EHLO.
7040 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7041 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7044 10. Logging of TCP/IP connections (when configured) now happens in the main
7045 daemon process instead of the child process, so that the TCP/IP connection
7046 count is more accurate (but it can never be perfect).
7048 11. The use of "drop" in a nested ACL was not being handled correctly in the
7049 outer ACL. Now, if condition failure induced by the nested "drop" causes
7050 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7051 or "require"), the connection is dropped.
7053 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7054 that yield "discard" can now be used with an "accept" or a "discard" verb,
7055 but an error is generated for any others (because I can't see a useful way
7056 to define what should happen).
7058 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7059 are now processed in the same way as lines in the Exim configuration file.
7060 In particular, continuation lines are supported.
7062 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7064 15. Added -ti meaning -t -i.
7066 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7067 domains, and warn by logging if others are found.
7069 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7070 returned from GIFCONF when Exim is trying to find the list of interfaces on
7071 a host. The code in os.c has been modified to copy each ifreq to an aligned
7072 structure in all cases.
7074 Also, in some cases, the returned ifreq's were being copied to a 'struct
7075 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7076 means the last couple of bytes of an IPv6 address could be chopped if the
7077 ifreq contained only a normal sockaddr (14 bytes storage).
7079 18. Named domain lists were not supported in the hosts_treat_as_local option.
7080 An entry such as +xxxx was not recognized, and was treated as a literal
7083 19. Ensure that header lines added by a DATA ACL are included in the reject log
7084 if the ACL subsequently rejects the message.
7086 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7087 MD5 (which is deprecated).
7089 21. When testing a filter file using -bf, Exim was writing a message when it
7090 took the sender from a "From " line in the message, but it was not doing so
7091 when it took $return_path from a Return-Path: header line. It now does.
7093 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7094 with a valid header line field name (a series of printing characters
7095 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7097 23. Changed "disc" in the source to "disk" to conform to the documentation and
7098 the book and for uniformity.
7100 24. Ignore Sendmail's -Ooption=value command line item.
7102 25. When execve() failed while trying to run a command in a pipe transport,
7103 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7104 could be confused with a return value of 69 from the command itself. This
7105 has been changed to 127, the value the shell returns if it is asked to run
7106 a non-existent command. The wording for the related log line suggests a
7107 non-existent command as the problem.
7109 26. If received_header_text expands to an empty string, do not add a Received:
7110 header line to the message. (Well, it adds a token one on the spool, but
7111 marks it "old" so that it doesn't get used or transmitted.)
7113 27. Installed eximstats 1.28 (addition of -nt option).
7115 28. There was no check for failure on the call to getsockname() in the daemon
7116 code. This can fail if there is a shortage of resources on the system, with
7117 ENOMEM, for example. A temporary error is now given on failure.
7119 29. Contrary to the C standard, it seems that in some environments, the
7120 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7121 program. Exim now does this explicitly; it affects the formatting of
7122 timestamps using strftime().
7124 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7125 complaints. I've now initialized all the variables, to avoid this.
7127 32. Header lines added by a system filter were not being "seen" during
7128 transport-time rewrites.
7130 33. The info_callback() function passed to OpenSSL is set up with type void
7131 (*)(SSL *, int, int), as described somewhere. However, when calling the
7132 function (actually a macro) that sets it up, the type void(*)() is
7133 expected. I've put in a cast to prevent warnings from picky compilers.
7135 34. If a DNS black list lookup found a CNAME record, but there were no A
7136 records associated with the domain it pointed at, Exim crashed.
7138 35. If a DNS black list lookup returned more than one A record, Exim ignored
7139 all but the first. It now scans all returned addresses if a particular IP
7140 value is being sought. In this situation, the contents of the
7141 $dnslist_value variable are a list of all the addresses, separated by a
7144 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7145 to accept a host name and all its aliases if the forward lookup for any of
7146 them yielded the IP address of the incoming connection. Now it accepts only
7147 those names whose forward lookup yields the correct IP address. Any other
7148 names are discarded. This closes a loophole whereby a rogue DNS
7149 administrator could create reverse DNS records to break through a
7150 wildcarded host restriction in an ACL.
7152 37. If a user filter or a system filter that ran in a subprocess used any of
7153 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7154 the wrong values were passed to the pipe command ($thisaddress had the
7155 value of $0, $0 had the value of $1, etc). This bug was introduced by
7156 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7158 38. Improved the line breaking for long SMTP error messages from ACLs.
7159 Previously, if there was no break point between 40 and 75 characters, Exim
7160 left the rest of the message alone. Two changes have been made: (a) I've
7161 reduced the minimum length to 35 characters; (b) if it can't find a break
7162 point between 35 and 75 characters, it looks ahead and uses the first one
7163 that it finds. This may give the occasional overlong line, but at least the
7164 remaining text gets split now.
7166 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7167 file descriptors might be low, and that setting 1000 would always raise it.
7168 It turns out that in some environments, the limit is already over 1000 and
7169 that lowering it causes trouble. So now Exim takes care not to decrease it.
7171 40. When delivering a message, the value of $return_path is set to $sender_
7172 address at the start of routing (routers may change the value). By an
7173 oversight, this default was not being set up when an address was tested by
7174 -bt or -bv, which affected the outcome if any router or filter referred to
7177 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7178 log only when "message" or "log_message" are set. However, if one of the
7179 conditions was an address verification, or a call to a nested ACL, the
7180 messages generated by the underlying test were being passed through. This
7181 no longer happens. The underlying message is available in $acl_verify_
7182 message for both "message" and "log_message" expansions, so it can be
7183 passed through if needed.
7185 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7186 new expansion $bh_ to give the encoded byte string without charset
7187 translation. Translation happens only if iconv() is available; HAVE_ICONV
7188 indicates this at build time. HEADERS_CHARSET gives the charset to
7189 translate to; headers_charset can change it in the configuration, and
7190 "headers charset" can change it in an individual filter file.
7192 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7193 that creates RFC 2047 encoded "words" labels them as that charset instead
7194 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7195 expansion operator; (ii) when Exim creates a From: line for a local
7196 message; (iii) when a header line is rewritten to include a "phrase" part.
7198 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7199 buggy, causing it to skip the first lines of messages whose message ID
7200 ended in 'D'. This would not have bitten before Exim release 4.14, because
7201 message IDs were unlikely to end in 'D' before then. The effect was to have
7202 incorrect size information for certain domains.
7204 45. #include "config.h" was missing at the start of the crypt16.c module. This
7205 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7208 46. If there was a timeout during a "random" callout check, Exim treated it as
7209 a failure of the random address, and carried on sending RSET and the real
7210 address. If the delay was just some slowness somewhere, the response to the
7211 original RCPT would be taken as a response to RSET and so on, causing
7212 mayhem of various kinds.
7214 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7215 when I implemented it. It didn't allow for the fact that some option values
7216 may legitimately be negative (e.g. size_addition), and it didn't even do
7217 the right test for positive values.
7219 48. Domain names in DNS records are case-independent. Exim always looks them up
7220 in lower case. Some resolvers return domain names in exactly the case they
7221 appear in the zone file, that is, they may contain uppercase letters. Not
7222 all resolvers do this - some return always lower case. Exim was treating a
7223 change of case by a resolver as a change of domain, similar to a widening
7224 of a domain abbreviation. This triggered its re-routing code and so it was
7225 trying to route what was effectively the same domain again. This normally
7226 caused routing to fail (because the router wouldn't handle the domain
7227 twice). Now Exim checks for this case specially, and just changes the
7228 casing of the domain that it ultimately uses when it transmits the message
7231 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7234 50. If a filter generated a file delivery with a non-absolute name (possible if
7235 no home directory exists for the router), the forbid_file option was not
7238 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7239 the existing equality matching.
7241 52. Exim was using ints instead of ino_t variables in some places where it was
7242 dealing with inode numbers.
7244 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7245 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7246 called TMPDIR, and if it finds it is different, it changes its value.
7248 54. The smtp_printf() function is now made available to local_scan() so
7249 additional output lines can be written before returning. There is also an
7250 smtp_fflush() function to enable the detection of a dropped connection.
7251 The variables smtp_input and smtp_batched_input are exported to
7254 55. Changed the default runtime configuration: the message "Unknown user"
7255 has been removed from the ACL, and instead placed on the localuser router,
7256 using the cannot_route_message feature. This means that any verification
7257 failures that generate their own messages won't get overridden. Similarly,
7258 the "Unrouteable address" message that was in the ACL for unverifiable
7259 relay addresses has also been removed.
7261 56. Added hosts_avoid_esmtp to the smtp transport.
7263 57. The exicyclog script was not checking for the esoteric option
7264 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7265 will work only if exicyclog is run under the appropriate euid.
7267 58. Following a discussion on the list, the rules by which Exim recognises line
7268 endings on incoming messages have been changed. The -dropcr and drop_cr
7269 options are now no-ops, retained only for backwards compatibility. The
7270 following line terminators are recognized: LF CRLF CR. However, special
7271 processing applies to CR:
7273 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7274 nor a local message in the state where . is a terminator.
7276 (ii) If a bare CR is encountered in a header line, an extra space is added
7277 after the line terminator so as not to end the header. The reasoning
7278 behind this is that bare CRs in header lines are most likely either
7279 to be mistakes, or people trying to play silly games.
7281 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7282 was being incorrectly given as 18 bytes larger than it should have been.
7283 This is a VOB (very old bug).
7285 60. This may never have affected anything current, but just in case it has:
7286 When the local host is found other than at the start of a list of hosts,
7287 the local host, those with the same MX, and any that follow, are discarded.
7288 When the list in question was part of a longer list of hosts, the following
7289 hosts (not currently being processed) were also being discarded. This no
7290 longer happens. I'm not sure if this situation could ever has previously
7293 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7296 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7297 header. This is something that is recommended in a new Internet Draft, and
7298 is something that is documented as being done by Sendmail. There are two
7299 possible values. For messages generated by the autoreply transport, Exim
7302 Auto-Submitted: auto-replied
7304 whereas for all other generated messages (e.g. bounces) it adds
7306 Auto-Submitted: auto-generated
7308 63. The "personal" condition in filters now includes a test for the
7309 Auto-Submitted: header. If it contains the string "auto-" the message it
7310 not considered personal.
7312 64. Added rcpt_include_affixes as a generic transport option.
7314 65. Added queue_only_override (default true).
7316 66. Added the syslog_duplication option.
7318 67. If what should have been the first header line of a message consisted of
7319 a space followed by a colon, Exim was mis-interpreting it as a header line.
7320 It isn't of course - it is syntactically invalid and should therefore be
7321 treated as the start of the message body. The misbehaviour could have
7322 caused a number of strange effects, including loss of data in subsequent
7323 header lines, and spool format errors.
7325 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7326 client host had authenticated. This control can now be exercised by an ACL
7327 for more flexibility.
7329 69. By default, callouts do not happen when testing with -bh. There is now a
7330 variant, -bhc, which does actually run the callout code, including
7331 consulting and updating the callout cache.
7333 70. Added support for saslauthd authentication, courtesy of Alexander
7336 71. If statvfs() failed on the spool or log directories while checking their
7337 size for availability, Exim confusingly gave the error "space shortage".
7338 Furthermore, in debugging mode it crashed with a floating point exception.
7339 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7340 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7341 serious problem, Exim now writes to the main and panic logs when this
7342 happens, with details of the failure. It then refuses to accept the
7343 incoming message, giving the message "spool directory problem" or "log
7344 directory problem" with a 421 code for SMTP messages.
7346 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7347 0, 1, and 2 exist, because some OS complain for execs without them (see
7348 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7349 descriptors. However, the code omitted to check that the open succeeded,
7350 causing mysterious errors if for some reason the permissions on /dev/null
7351 got screwed. Now Exim writes a message to the main and panic logs, and
7352 bombs out if it can't open /dev/null.
7354 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7355 interact so that it is all more flexible. It is supposed to remain
7356 backwards compatible. Also added extra_local_interfaces.
7358 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7359 to bomb out with an assertion failure - to the client this appears as a
7360 connection drop. This problem occurs in the part of the code that was taken
7361 from the Samba project. Fortunately, the assertion is in a very simple
7362 function, so I have fixed this by reproducing the function inline in the
7363 one place where it is called, and arranging for authentication to fail
7364 instead of killing the process with assert().
7366 75. The SPA client code was not working when the server requested OEM rather
7367 than Unicode encoding.
7369 76. Added code to make require_files with a specific uid setting more usable in
7370 the case where statting the file as root fails - usually a non-root-mounted
7371 NFS file system. When this happens and the failure is EACCES, Exim now
7372 forks a subprocess and does the per-uid checking as the relevant uid.
7374 77. Added process_log_path.
7376 78. If log_file_path was not explicitly set, a setting of check_log_space or
7377 check_log_inodes was ignored.
7379 79. If a space check for the spool or log partitions fails, the incident is now
7380 logged. Of course, in the latter case the data may get lost...
7382 80. Added the %p formatting code to string_format() so that it can be used to
7383 print addresses in debug_print(). Adjusted all the address printing in the
7384 debugging in store.c to use %p rather than %d.
7386 81. There was a concern that a line of code in smtp_in.c could overflow a
7387 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7388 initially expressed, the concern was not well-founded, because trailing
7389 spaces are removed early. However, if the trailing spaces were followed by
7390 a NULL, they did not get removed, so the overflow was possible. Two fixes
7393 (a) I re-wrote the offending code in a cleaner fashion.
7394 (b) If an incoming SMTP command contains a NULL character, it is rejected
7397 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7398 runs initgroups(), so that if the Exim user is in any additional groups,
7399 they will be used during message reception.
7405 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob