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.
10 HS/01 Handle trailing backslash gracefully. (CVE-2019-15846)
16 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
22 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
23 buffer overrun for (non-chunking) other transports.
25 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
26 TLS1.3, means that a server rejecting a client certificate is not visible
27 to the client until the first read of encrypted data (typically the
28 response to EHLO). Add detection for that case and treat it as a failed
29 TLS connection attempt, so that the normal retry-in-clear can work (if
32 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
33 and/or domain. Found and fixed by Jason Betts.
35 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
36 configuration). If a CNAME target was not a wellformed name pattern, a
39 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
40 the OS reports them interleaved with other addresses.
42 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
43 used both for input and for a verify callout, both encrypted, SMTP
44 responses being sent by the server could be lost. This resulted in
45 dropped connections and sometimes bounces generated by a peer sending
48 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
49 string. Previously it was possible to cause undefined behaviour in a
50 library routine (usually a crash). Found by "zerons".
57 JH/01 Remove code calling the customisable local_scan function, unless a new
58 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
60 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
61 non-signal-safe functions being used.
63 JH/03 Bug 2269: When presented with a received message having a stupidly large
64 number of DKIM-Signature headers, disable DKIM verification to avoid
65 a resource-consumption attack. The limit is set at twenty.
67 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
68 report of oldest_pass in ${authres } in consequence, and separate out
69 some descriptions of reasons for verification fail.
71 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
72 files in the spool were present and unlocked. A queue-runner could spot
73 them, resulting in a duplicate delivery. Fix that by doing the unlock
74 after the unlink. Investigation by Tim Stewart. Take the opportunity to
75 add more error-checking on spoolfile handling while that code is being
78 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
79 No known attacks, no CVE, this is defensive hardening.
81 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
82 a queue-runner could start a delivery while other operations were ongoing.
83 Cutthrough delivery was a common victim, resulting in duplicate delivery.
84 Found and investigated by Tim Stewart. Fix by using the open message data
85 file handle rather than opening another, and not locally closing it (which
86 releases a lock) for that case, while creating the temporary .eml format
87 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
89 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
90 $sender_verify_failure/$recipient_verify_failure to "random".
92 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
95 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
96 Previously this would segfault.
98 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
101 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
102 like zero, since the resolver should be doing this for us, But we need one
103 as a CNAME but no MX presence gets the CNAME returned; we need to check
104 that doesn't point to an MX to declare it "no MX returned" rather than
105 "error, loop". A new main option is added so the older capability of
106 following some limited number of chain links is maintained.
108 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
110 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
111 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
112 now-deprecated earlier definitions used only specified the range up to TLS
113 1.2 (in the older-version library docs).
115 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
117 JH/15 Rework TLS client-side context management. Stop using a global, and
118 explicitly pass a context around. This enables future use of TLS for
119 connections to service-daemons (eg. malware scanning) while a client smtp
120 connection is using TLS; with cutthrough connections this is quite likely.
122 JH/16 Fix ARC verification to do AS checks in reverse order.
124 JH/17 Support a "tls" option on the ${readsocket } expansion item.
126 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
127 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
128 Previously the "utf8" would be re-prepended for every additional message.
130 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
131 Previously thery were accepted, resulting in issues when attempting to
132 forward messages to a non-supporting MTA.
134 PP/02 Let -n work with printing macros too, not just options.
136 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
137 one parent address was copied, and bogus data was used at delivery-logging
138 time. Either a crash (after delivery) or bogus log data could result.
139 Discovery and analysis by Tim Stewart.
141 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
142 Previously if the string ended mid-character, we did not insert the
143 promised '?' replacement.
145 PP/04 Documentation: current string operators work on bytes, not codepoints.
147 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
148 should pack well giving a smaller memory footprint so better caching and
149 therefore performance. Group the declarations where this can't be done so
150 that the byte-sized flag variables are not interspersed among pointer
151 variables, giving a better chance of good packing by the compiler.
153 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
154 non-null, to avoid issues with sites running BATV. Previously reports were
155 sent with an empty envelope sender so looked like bounces.
157 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
158 The ignore_error flag wasn't being returned from the filter subprocess so
159 was not set for later routers. Investigation and fix by Matthias Kurz.
161 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
162 and a msg:complete for the whole, when a message is manually removed using
163 -Mrm. Developement by Matthias Kurz, hacked on by JH.
165 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
166 a "Gnu special" function, asprintf() in the DB utility binary builds; I
167 hope that is portable enough.
169 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
170 requiring a known-CA anchor certificate; make it now rely entirely on the
171 TLSA as an anchor. Checking the name on the leaf cert against the name
172 on the A-record for the host is still done for TA (but not for EE mode).
174 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
175 included in delivery lines for non-proxied connections, when compiled with
176 SUPPORT_SOCKS and running with proxy logging enabled.
178 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
179 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
180 move the existing event to fire before the normal logging of message
181 failure so that custom logging is bracketed by normal logging.
183 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
184 msg:fail:internal event. Developement by Matthias Kurz.
186 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
187 far too small for todays use of crypto signatures stored there. Go all
188 the way to the max DNS message size of 64kB, even though this might be
189 overmuch for IOT constrained device use.
191 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
192 copy a string over itself. The library routine is documented as not
193 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
195 JH/32 For main options check_spool_space and check_inode_space, where the
196 platform supports 64b integers, support more than the previous 2^31 kB
197 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
198 the previous G, M, k.
200 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
201 $authenticated_fail_id variable on authentication failure. Previously
204 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
205 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
206 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
207 GNUTLS_SEC_PARAM_MEDIUM.
209 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
210 side. Previously we would continue as if no SNI had been received.
212 JH/36 Harden the handling of string-lists. When a list consisted of a sole
213 "<" character, which should be a list-separator specification, we walked
214 off past the nul-terimation.
216 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
217 causes) even when the retry time is not yet met. Previously they were
218 not, meaning that when (say) an account was over-quota and temp-rejecting,
219 and multiple senders' messages were queued, only one sender would get
220 notified on each configured delay_warning cycle.
222 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
224 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
225 cipher-suites, an error can be left on the stack even for a succeeding
226 accept; this results in impossible error messages when a later operation
229 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
230 return error codes indicating retry. Under TLS1.3 this becomes required.
232 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
233 it only wrote the new authenticators, resulting in a lack of tracking of
234 peer changes of ESMTP extensions until the next cache flush.
236 JH/41 Fix the loop reading a message header line to check for integer overflow,
237 and more-often against header_maxsize. Previously a crafted message could
238 induce a crash of the recive process; now the message is cleanly rejected.
240 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
241 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
247 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
248 When redis_servers is set to a list of > 1 element, and the Redis servers
249 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
250 case of MOVED into a DEFER case instead, thus moving the query onto the
251 next server in the list. For a cluster of N elements, all N servers must
252 be defined in redis_servers.
254 GF/02 Catch and remove uninitialized value warning in exiqsumm
255 Check for existence of @ARGV before looking at $ARGV[0]
257 JH/01 Replace the store_release() internal interface with store_newblock(),
258 which internalises the check required to safely use the old one, plus
259 the allocate and data copy operations duplicated in both (!) of the
260 extant use locations.
262 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
263 modifier. This matches the restriction on the commandline.
265 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
266 Previously only the last row was returned.
268 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
269 we assumed that tags in the header were well-formed, and parsed the
270 element content after inspecting only the first char of the tag.
271 Assumptions at that stage could crash the receive process on malformed
274 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
275 While running the DKIM ACL we operate on the Permanent memory pool so that
276 variables created with "set" persist to the DATA ACL. Also (at any time)
277 DNS lookups that fail create cache records using the Permanent pool. But
278 expansions release any allocations made on the current pool - so a dnsdb
279 lookup expansion done in the DKIM ACL releases the memory used for the
280 DNS negative-cache, and bad things result. Solution is to switch to the
281 Main pool for expansions.
282 While we're in that code, add checks on the DNS cache during store_reset,
283 active in the testsuite.
284 Problem spotted, and debugging aided, by Wolfgang Breyha.
286 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
287 When none of the hosts presented to a transport match an already-open
288 connection, close it and proceed with the list. Previously we would
289 queue the message. Spotted by Lena with Yahoo, probably involving
292 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
293 Previously a spurious "250 OK id=" response was appended to the proper
296 JH/08 The "support for" informational output now, which built with Content
297 Scanning support, has a line for the malware scanner interfaces compiled
298 in. Interface can be individually included or not at build time.
300 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
301 by the template makefile "src/EDITME". The "STREAM" support for an older
302 ClamAV interface method is removed.
304 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
305 rows affected is given instead).
307 JH/11 The runtime Berkeley DB library version is now additionally output by
308 "exim -d -bV". Previously only the compile-time version was shown.
310 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
311 SMTP connection. Previously, when one had more receipients than the
312 first, an abortive onward connection was made. Move to full support for
313 multiple onward connections in sequence, handling cutthrough connection
314 for all multi-message initiating connections.
316 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
317 routers. Previously, a multi-recipient message would fail to match the
318 onward-connection opened for the first recipient, and cause its closure.
320 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
321 a timeout on read on a GnuTLS initiating connection, resulting in the
322 initiating connection being dropped. This mattered most when the callout
323 was marked defer_ok. Fix to keep the two timeout-detection methods
326 JH/15 Relax results from ACL control request to enable cutthrough, in
327 unsupported situations, from error to silently (except under debug)
328 ignoring. This covers use with PRDR, frozen messages, queue-only and
331 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
333 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
334 metadata, resulting in a crash in free().
336 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
337 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
338 Broken also in d185889f4, with init system revamp.
340 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
341 Previously we abruptly closed the connection after reading a malware-
342 found indication; now we go on to read the "scan ok" response line,
345 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
346 ACL. Previously, a crash would result.
348 JH/19 Speed up macro lookups during configuration file read, by skipping non-
349 macro text after a replacement (previously it was only once per line) and
350 by skipping builtin macros when searching for an uppercase lead character.
352 JH/20 DANE support moved from Experimental to mainline. The Makefile control
353 for the build is renamed.
355 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
356 was allocated for every new TLS startup, meaning one per message. Fix
357 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
359 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
360 reported the original. Fix to report (as far as possible) the ACL
361 result replacing the original.
363 JH/23 Fix memory leak during multi-message connections using STARTTLS under
364 OpenSSL. Certificate information is loaded for every new TLS startup,
365 and the resources needed to be freed.
367 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
369 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
372 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
373 DATA response info to the (existing) per-recipient response info for
374 the "C=" log element. It can have useful tracking info from the
375 destination system. Patch from Simon Arlott.
377 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
378 length value. Previously this would segfault.
380 HS/02 Support Avast multiline protoocol, this allows passing flags to
381 newer versions of the scanner.
383 JH/28 Ensure that variables possibly set during message acceptance are marked
384 dead before release of memory in the daemon loop. This stops complaints
385 about them when the debug_store option is enabled. Discovered specifically
386 for sender_rate_period, but applies to a whole set of variables.
387 Do the same for the queue-runner and queue-list loops, for variables set
388 from spool message files. Do the same for the SMTP per-message loop, for
389 certain variables indirectly set in ACL operations.
391 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
392 as a multi-recipient message from a mailinglist manager). The coding had
393 an arbitrary cutoff number of characters while checking for more input;
394 enforced by writing a NUL into the buffer. This corrupted long / fast
395 input. The problem was exposed more widely when more pipelineing of SMTP
396 responses was introduced, and one Exim system was feeding another.
397 The symptom is log complaints of SMTP syntax error (NUL chars) on the
398 receiving system, and refused recipients seen by the sending system
399 (propating to people being dropped from mailing lists).
400 Discovered and pinpointed by David Carter.
402 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
403 replaced by the ${authresults } expansion.
405 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
407 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
408 allows proper process termination in container environments.
410 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
411 Previously the "final dot" had a newline after it; ensure it is CR,LF.
413 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
414 and "err_perm", deprecated since 4.83 when the RFC-defined words
415 "temperror" and "permerror" were introduced.
417 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
418 transport-filters or DKIM-signing. The restriction was lost in the
419 consolidation of verify-callout and delivery SMTP handling.
420 Extend the restriction to also cover ARC-signing.
422 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
423 in defer=pass mode supply a 450 to the initiator. Previously the message
426 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
427 tls_require_ciphers is used as before.
429 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
430 "pass_unscanned". Only tmpfails from the scanner are written to
431 the paniclog, as they may require admin intervention (permission
432 denied, license issues). Other scanner errors (like decompression
433 bombs) do not cause a paniclog entry.
435 JH/36 Fix reinitialisation of DKIM logging variable between messages.
436 Previously it was possible to log spurious information in receive log
439 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
440 triggered odd behaviour from Outlook Express clients.
442 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
445 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
446 since the IETF WG has not yet settled on that versus the original
447 "bare" representation.
449 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
450 Previously the millisecond value corrupted the output.
451 Fix also for syslog_pid=no and log_selector +pid, for which the pid
452 corrupted the output.
458 JH/01 Rework error string handling in TLS interface so that the caller in
459 more cases is responsible for logging. This permits library-sourced
460 string to be attached to addresses during delivery, and collapses
461 pairs of long lines into single ones.
463 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
464 during configuration. Wildcards are allowed and expanded.
466 JH/02 Rework error string handling in DKIM to pass more info back to callers.
467 This permits better logging.
469 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
470 do not close it down and have the child transport start it up again on
471 the passed-on TCP connection. Instead, proxy the child (and any
472 subsequent ones) for TLS via a unix-domain socket channel. Logging is
473 affected: the continued delivery log lines do not have any DNSSEC, TLS
474 Certificate or OCSP information. TLS cipher information is still logged.
476 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
477 identical IP addresses on different listening ports. Will also affect
480 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
481 add noisy ifdef guards to special-case this sillyness.
482 Patch from Bernd Kuhls.
484 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
485 than 255 are no longer allowed.
487 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
488 Disable the session-cache too, which might reduce our load. Since we
489 currrectly use a new context for every connection, both as server and
490 client, there is no benefit for these.
491 GnuTLS appears to not support tickets server-side by default (we don't
492 call gnutls_session_ticket_enable_server()) but client side is enabled
493 by default on recent versions (3.1.3 +) unless the PFS priority string
496 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
497 <https://reproducible-builds.org/specs/source-date-epoch/>.
499 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
500 the check for any unsuccessful recipients did not notice the limit, and
501 erroneously found still-pending ones.
503 JH/08 Pipeline CHUNKING command and data together, on kernels that support
504 MSG_MORE. Only in-clear (not on TLS connections).
506 JH/09 Avoid using a temporary file during transport using dkim. Unless a
507 transport-filter is involved we can buffer the headers in memory for
508 creating the signature, and read the spool data file once for the
509 signature and again for transmission.
511 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
512 4.77 as the kernel support then wasn't solid, having issues in 64bit
513 mode. Now, it's been long enough. Add support for FreeBSD also.
515 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
516 case where the routing stage had gathered several addresses to send to
517 a host before calling the transport for the first, we previously failed
518 to close down TLS in the old transport process before passing the TCP
519 connection to the new process. The new one sent a STARTTLS command
520 which naturally failed, giving a failed delivery and bloating the retry
521 database. Investigation and fix prototype from Wolfgang Breyha.
523 JH/12 Fix check on SMTP command input synchronisation. Previously there were
524 false-negatives in the check that the sender had not preempted a response
525 or prompt from Exim (running as a server), due to that code's lack of
526 awareness of the SMTP input buffering.
528 PP/04 Add commandline_checks_require_admin option.
529 Exim drops privileges sanely, various checks such as -be aren't a
530 security problem, as long as you trust local users with access to their
531 own account. When invoked by services which pass untrusted data to
532 Exim, this might be an issue. Set this option in main configuration
533 AND make fixes to the calling application, such as using `--` to stop
536 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
537 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
538 responses to those, into a single TLS record each way (this usually means
539 a single packet). As a side issue, smtp_enforce_sync now works on TLS
542 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
543 affects you only if you're dancing at the edge of the param size limits.
544 If you are, and this message makes sense to you, then: raise the
545 configured limit or use OpenSSL 1.1. Nothing we can do for older
548 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
549 cmdline element to get the documented default one. Previously it was
552 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
553 are unsuable for non-message-specific reasons - eg. connection timeout,
554 banner-time rejection.
556 JH/16 Fix logging of delivery remote port, when specified by router, under
559 PP/06 Repair manualroute's ability to take options in any order, even if one
560 is the name of a transport.
563 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
565 JH/17 Change the list-building routines interface to use the expanding-string
566 triplet model, for better allocation and copying behaviour.
568 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
569 Previously it was constructed the first time a possibly-matching string
570 was met in the configuration file input during startup; now it is done
573 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
574 compatible one, to avoid the (poorly documented) possibility of a config
575 file in the working directory redirecting the DB files, possibly correpting
576 some existing file. CVE-2017-10140 assigned for BDB.
578 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
579 cache-hot. Previously, although the result was properly cached, the
580 initial verify call returned a defer.
582 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
583 the main verify for receipient in uncached-mode.
585 JH/22 Retire historical build files to an "unsupported" subdir. These are
586 defined as "ones for which we have no current evidence of testing".
588 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
589 if present. Previously it was ignored.
591 JH/24 Start using specified-initialisers in C structure init coding. This is
592 a C99 feature (it's 2017, so now considered safe).
594 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
595 if was a fixed-sized field and bitmask ops via macros; it is now more
598 PP/07 GitHub PR 56: Apply MariaDB build fix.
599 Patch provided by Jaroslav Škarvada.
601 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
602 during Coverity cleanups [4.87 JH/47]
603 Diagnosis and fix provided by Michael Fischer v. Mollard.
605 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
606 the right size to place the terminating semicolon on its own folded
607 line, the header hash was calculated to an incorrect value thanks to
608 the (relaxed) space the fold became.
610 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
611 and confused the parent.
613 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
614 which could crash as a result. This could lead to undeliverable messages.
616 JH/28 Logging: "next input sent too soon" now shows where input was truncated
619 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
620 matters on fast-turnover and PID-randomising systems, which were getting
621 out-of-order delivery.
623 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
624 a possibly-overlapping copy. The symptom was that "Remote host closed
625 connection in response to HELO" was logged instead of the actual 4xx
628 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
629 Previously only that bufferd was discarded, resulting in SYMTP command
632 JH/32 DKIM: when a message has multiple signatures matching an identity given
633 in dkim_verify_signers, run the dkim acl once for each. Previously only
634 one run was done. Bug 2189.
636 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
637 "panic the current process" to "deliberately defer". The panic log is
638 still written with the problem list name; the mail and reject logs now
639 get a temp-reject line for the message that was being handled, saying
640 something like "domains check lookup or other defer". The SMTP 451
641 message is still "Temporary local problem".
643 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
644 A crafted sequence of BDAT commands could result in in-use memory beeing
645 freed. CVE-2017-16943.
647 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
648 from SMTP input. Previously it was always done; now only done for DATA
649 and not BDAT commands. CVE-2017-16944.
651 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
652 to the message (such as an overlong header line). Previously this was
653 not done and we did not exit BDAT mode. Followon from the previous item
654 though a different problem.
660 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
661 than -2003 did; needs libidn2 in addition to libidn.
663 JH/02 The path option on a pipe transport is now expanded before use.
665 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
666 Patch provided by "Björn", documentation fix added too.
668 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
669 missing a wire-to-host endian conversion.
671 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
672 close after a BDAT command line could be taken as a following command,
673 giving a synch failure. Fix by only checking for synch immediately
674 before acknowledging the chunk.
676 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
677 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
678 macro. Patches provided by Josh Soref.
680 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
681 Previously we did not; the RFC seems ambiguous and VRFY is not listed
682 by IANA as a service extension. However, John Klensin suggests that we
685 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
686 the dkim code may be unix-mode line endings rather than smtp wire-format
687 CRLF, so prepend a CR to any bare LF.
689 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
690 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
692 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
693 the first were themselves being wrongly included in the feed into dkim
694 processing; with most chunk sizes in use this resulted in an incorrect
695 body hash calculated value.
697 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
698 DKIM signature block, for verification. Although advised against by
699 standards it is specifically not ruled illegal.
701 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
703 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
704 missing a body hash (the bh= tag).
706 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
707 It seems that HAProxy sends the Proxy Protocol information in clear and
708 only then does a TLS startup, so do the same.
710 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
711 TCP connections (such as for Spamd) unless the daemon successfully set
712 Fast Open mode on its listening sockets. This fixes breakage seen on
713 too-old kernels or those not configured for Fast Open, at the cost of
714 requiring both directions being enabled for TFO, and TFO never being used
715 by non-daemon-related Exim processes.
717 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
718 endings, at least on the first header line. Try to canonify any that get
719 past that check, despite the cost.
721 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
722 now limited to an arbitrary five deep, while parsing addresses with the
723 strip_excess_angle_brackets option enabled.
725 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
726 instead leave the unprompted TLS handshake in socket buffer for the
727 TLS library to consume.
729 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
731 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
733 JH/16 Drop variables when they go out of scope. Memory management drops a whole
734 region in one operation, for speed, and this leaves assigned pointers
735 dangling. Add checks run only under the testsuite which checks all
736 variables at a store-reset and panics on a dangling pointer; add code
737 explicitly nulling out all the variables discovered. Fixes one known
738 bug: a transport crash, where a dangling pointer for $sending_ip_address
739 originally assigned in a verify callout, is re-used.
741 PP/06 Drop '.' from @INC in various Perl scripts.
743 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
745 PP/08 Reduce a number of compilation warnings under clang; building with
746 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
747 should be warning-free.
749 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
751 HS/01 Fix portability problems introduced by PP/08 for platforms where
752 realloc(NULL) is not equivalent to malloc() [SunOS et al].
754 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
755 chunk. This allows us to accept broken chunked messages. We need a more
756 general solution here.
758 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
759 already-broken messages in the queue.
761 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
763 JH/19 Fix reference counting bug in routing-generated-address tracking.
769 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
770 supports it and a size is available (ie. the sending peer gave us one).
772 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
773 years of being deprecated). The replacements are the ACLs
774 acl_smtp_mime and acl_not_smtp_mime.
776 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
777 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
778 or even an in-clear connection were permitted. Now, if the host lookup
779 was dnssec and dane was requested then the host is only used if the
780 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
781 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
782 if one fails this test.
783 This means that a poorly-configured remote DNS will make it incommunicado;
784 but it protects against a DNS-interception attack on it.
786 JH/04 Bug 1810: make continued-use of an open smtp transport connection
787 non-noisy when a race steals the message being considered.
789 JH/05 If main configuration option tls_certificate is unset, generate a
790 self-signed certificate for inbound TLS connections.
792 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
793 in rewrites and routers.
795 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
796 and logged a warning sing 4.83; now they are a configuration file error.
798 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
799 (lacking @domain). Apply the same qualification processing as RCPT.
801 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
803 JH/10 Support ${sha256:} applied to a string (as well as the previous
806 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
807 a cutthrough deliver is pending, as we always want to make a connection.
808 This also avoids re-routing the message when later placing the cutthrough
809 connection after a verify cache hit.
810 Do not update it with the verify result either.
812 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
813 when routing results in more than one destination address.
815 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
816 signing (which inhibits the cutthrough capability). Previously only
817 the presence of an option was tested; now an expansion evaluating as
818 empty is permissible (obviously it should depend only on data available
819 when the cutthrough connection is made).
821 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
822 the relevant preceding SMTP command did not note the pipelining mode.
824 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
825 Previously they were not counted.
827 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
828 as one having no matching records. Previously we deferred the message
829 that needed the lookup.
831 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
832 distinguished as "(=".
834 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
835 for missing MX records. Previously it only worked for missing A records.
837 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
839 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
840 after the data-go-ahead and data-ack. Patch from Jason Betts.
842 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
843 even for a "none" policy. Patch from Tony Meyer.
845 JH/22 Fix continued use of a connection for further deliveries. If a port was
846 specified by a router, it must also match for the delivery to be
849 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
850 When one of the recipients of a message was unsuitable for the connection
851 (has no matching addresses), we lost track of needing to mark it
852 deferred. As a result mail would be lost.
854 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
856 JH/25 Decoding ACL controls is now done using a binary search; the source code
857 takes up less space and should be simpler to maintain. Merge the ACL
858 condition decode tables also, with similar effect.
860 JH/26 Fix problem with one_time used on a redirect router which returned the
861 parent address unchanged. A retry would see the parent address marked as
862 delivered, so not attempt the (identical) child. As a result mail would
865 JH/27 Fix a possible security hole, wherein a process operating with the Exim
866 UID can gain a root shell. Credit to http://www.halfdog.net/ for
867 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
870 JH/28 Enable {spool,log} filesystem space and inode checks as default.
871 Main config options check_{log,spool}_{inodes,space} are now
872 100 inodes, 10MB unless set otherwise in the configuration.
874 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
875 Previously it only applied to the main-section connection policy
878 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
880 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
881 by me. Added RFC7919 DH primes as an alternative.
883 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
884 are not in the system include path.
886 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
887 GnuTLS, when a session startup failed (eg because the client disconnected)
888 Exim did stdio operations after fclose. This was exposed by a recent
889 change which nulled out the file handle after the fclose.
891 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
892 signed directly by the cert-signing cert, rather than an intermediate
893 OCSP-signing cert. This is the model used by LetsEncrypt.
895 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
897 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
898 an incoming connection.
900 HS/02 Bug 1802: Do not half-close the connection after sending a request
903 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
904 fallback to "prime256v1".
906 JH/34 SECURITY: Use proper copy of DATA command in error message.
907 Could leak key material. Remotely exploitable. CVE-2016-9963.
913 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
914 and 3.4.4 - once the server is enabled to respond to an OCSP request
915 it does even when not requested, resulting in a stapling non-aware
916 client dropping the TLS connection.
918 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
919 support variable-length bit vectors. No functional change.
921 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
922 The I= interface field on outgoing lines is now after the H= remote
923 host field, same as incoming lines. There is a separate
924 outgoing_interface log selector which allows you to disable the
927 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
928 If not running log_selector +smtp_connection the mainlog would be held
929 open indefinitely after a "too many connections" event, including to a
930 deleted file after a log rotate. Leave the per net connection logging
931 leaving it open for efficiency as that will be quickly detected by the
932 check on the next write.
934 HS/01 Bug 1671: Fix post transport crash.
935 Processing the wait-<transport> messages could crash the delivery
936 process if the message IDs didn't exist for some reason. When
937 using 'split_spool_directory=yes' the construction of the spool
938 file name failed already, exposing the same netto behaviour.
940 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
941 mime_regex ACL conditions.
943 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
944 to DSN fail messages (bounces): remote IP, remote greeting, remote response
945 to HELO, local diagnostic string.
947 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
948 log line to debug. Even when configured with a tls authenticator many
949 client connections are expected to not authenticate in this way, so
950 an authenticate fail is not an error.
952 HS/02 Add the Exim version string to the process info. This way exiwhat
953 gives some more detail about the running daemon.
955 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
956 matter for fast-change records such as DNSBLs.
958 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
959 retry record, even if constant. There may be multiple transports with
960 different interface settings and the retry behaviour needs to be kept
963 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
965 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
967 JH/10 Bug 840: fix log_defer_output option of pipe transport
969 JH/11 Bug 830: use same host for all RCPTS of a message, even under
970 hosts_randomize. This matters a lot when combined with mua_wrapper.
972 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
973 ${quote_pgsql:<string>} operator.
975 JH/13 Bug 1708: avoid misaligned access in cached lookup.
977 JH/14 Change header file name for freeradius-client. Relevant if compiling
978 with Radius support; from the Gentoo tree and checked under Fedora.
980 JH/15 Bug 1712: Introduce $prdr_requested flag variable
982 JH/16 Bug 1714: Permit an empty string as expansion result for transport
983 option transport_filter, meaning no filtering.
985 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
987 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
988 defaults to "*" (all hosts). The variable is now available when not built
989 with TLS, default unset, mainly to enable keeping the testsuite sane.
990 If a server certificate is not supplied (via tls_certificate) an error is
991 logged, and clients will find TLS connections fail on startup. Presumably
992 they will retry in-clear.
993 Packagers of Exim are strongly encouraged to create a server certificate
994 at installation time.
996 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
997 with the $config_file variable.
999 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1000 in transport context, after the attempt, and per-recipient. The latter type
1001 is per host attempted. The event data is the error message, and the errno
1002 information encodes the lookup type (A vs. MX) used for the (first) host,
1003 and the trailing two digits of the smtp 4xx response.
1005 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1006 to write to mainlog (or rejectlog, paniclog) in the window between file
1007 creation and permissions/ownership being changed. Particularly affects
1008 installations where exicyclog is run as root, rather than exim user;
1009 result is that the running daemon panics and dies.
1011 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1013 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1014 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1015 "pri" and "weight". Note that the previous implicit priority given by the
1016 list order is no longer honoured.
1018 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1019 for DKIM processing.
1021 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1022 by defining SUPPORT_SOCKS.
1024 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1025 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1026 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1027 variables are renamed to proxy_{local,external}_{address,port}.
1029 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1030 for a build by defining SUPPORT_I18N
1032 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1033 of the query string, and make ${quote_redis:} do that quoting.
1035 JH/29 Move Events support from Experimental to mainline, enabled by default
1036 and removable for a build by defining DISABLE_EVENT.
1038 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1040 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1041 cached by the daemon.
1043 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1044 by defining LOOKUP_REDIS. The libhiredis library is required.
1046 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1047 keys are given for lookup.
1049 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1050 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1051 only supported when built with TLS support. The PolarSSL SHA routines
1052 are still used when the TLS library is too old for convenient support.
1054 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1055 openssl_options), for security. OpenSSL forces this from version 1.1.0
1056 server-side so match that on older versions.
1058 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1059 allocation for $value could be released as the expansion processing
1060 concluded, but leaving the global pointer active for it.
1062 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1063 and to use the domains and local_parts ACL conditions.
1065 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1066 incorrectly not doubled on cutthrough transmission, hence seen as a
1067 body-termination at the receiving system - resulting in truncated mails.
1068 Commonly the sender saw a TCP-level error, and retransmitted the message
1069 via the normal store-and-forward channel. This could result in duplicates
1070 received - but deduplicating mailstores were liable to retain only the
1071 initial truncated version.
1073 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1075 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1077 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1078 we're in there, support oversigning also; bug 1309.
1080 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1082 HS/04 Add support for keep_environment and add_environment options.
1084 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1085 either intentional arithmetic overflow during PRNG, or testing config-
1088 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1089 delivery resulted in actual delivery. Cancel cutthrough before DATA
1092 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1093 rejects a recipient: pass the reject to the originator.
1095 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1096 Many were false-positives and ignorable, but it's worth fixing the
1099 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1100 for the new environment-manipulation done at startup. Move the routines
1101 from being local to tls.c to being global via the os.c file.
1103 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1104 an extract embedded as result-arg for a map, the first arg for extract
1105 is unavailable so we cannot tell if this is a numbered or keyed
1106 extraction. Accept either.
1112 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1115 JH/02 The smtp transport option "multi_domain" is now expanded.
1117 JH/03 The smtp transport now requests PRDR by default, if the server offers
1120 JH/04 Certificate name checking on server certificates, when exim is a client,
1121 is now done by default. The transport option tls_verify_cert_hostnames
1122 can be used to disable this per-host. The build option
1123 EXPERIMENTAL_CERTNAMES is withdrawn.
1125 JH/05 The value of the tls_verify_certificates smtp transport and main options
1126 default to the word "system" to access the system default CA bundle.
1127 For GnuTLS, only version 3.0.20 or later.
1129 JH/06 Verification of the server certificate for a TLS connection is now tried
1130 (but not required) by default. The verification status is now logged by
1131 default, for both outbound TLS and client-certificate supplying inbound
1134 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1137 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1138 Status Notification (bounce) messages are now MIME format per RFC 3464.
1139 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1140 under the control of the dsn_advertise_hosts option, and routers may
1141 have a dsn_lasthop option.
1143 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1144 default, modifiable by a malware= option. The list separator for
1145 the options can now be changed in the usual way. Bug 68.
1147 JH/10 The smtp_receive_timeout main option is now expanded before use.
1149 JH/11 The incoming_interface log option now also enables logging of the
1150 local interface on delivery outgoing connections.
1152 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1153 if the interface and destination host and port all match.
1155 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1158 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1159 Patch from Andrew Lewis.
1161 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1162 now supports optional time-restrictions, weighting, and priority
1163 modifiers per server. Patch originally by <rommer@active.by>.
1165 JH/16 The spamd_address main option now supports a mixed list of local
1166 and remote servers. Remote servers can be IPv6 addresses, and
1167 specify a port-range.
1169 JH/17 Bug 68: The spamd_address main option now supports an optional
1170 timeout value per server.
1172 JH/18 Bug 1581: Router and transport options headers_add/remove can
1173 now have the list separator specified.
1175 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1178 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1181 JH/21 Support for the A6 type of dns record is withdrawn.
1183 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1184 rather than the verbs used.
1186 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1187 from 255 to 1024 chars.
1189 JH/24 Verification callouts now attempt to use TLS by default.
1191 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1192 are generic router options now. The defaults didn't change.
1194 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1195 Original patch from Alexander Shikoff, worked over by JH.
1197 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1198 files if ZCAT_COMMAND is not executable.
1200 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1202 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1204 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1205 Normally benign, it bites when the pair was led to by a CNAME;
1206 modern usage is to not canonicalize the domain to a CNAME target
1207 (and we were inconsistent anyway for A-only vs AAAA+A).
1209 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1211 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1212 when evaluating $sender_host_dnssec.
1214 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1215 $sender_helo_dnssec variable.
1217 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1219 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1221 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1223 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1224 documented as working, but never had. Support all but $spam_report.
1226 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1227 added for tls authenticator.
1229 HS/03 Add perl_taintmode main config option
1235 TL/01 When running the test suite, the README says that variables such as
1236 no_msglog_check are global and can be placed anywhere in a specific
1237 test's script, however it was observed that placement needed to be near
1238 the beginning for it to behave that way. Changed the runtest perl
1239 script to read through the entire script once to detect and set these
1240 variables, reset to the beginning of the script, and then run through
1241 the script parsing/test process like normal.
1243 TL/02 The BSD's have an arc4random API. One of the functions to induce
1244 adding randomness was arc4random_stir(), but it has been removed in
1245 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1246 function when detected.
1248 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1249 cause callback expansion.
1251 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1252 syntax errors in an expansion can be treated as a string instead of
1253 logging or causing an error, due to the internal use of bool_lax
1254 instead of bool when processing it.
1256 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1257 server certificates when making smtp deliveries.
1259 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1261 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1263 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1265 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1266 Merged patch from Sebastian Wiedenroth.
1268 JH/05 Fix results-pipe from transport process. Several recipients, combined
1269 with certificate use, exposed issues where response data items split
1270 over buffer boundaries were not parsed properly. This eventually
1271 resulted in duplicates being sent. This issue only became common enough
1272 to notice due to the introduction of connection certificate information,
1273 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1275 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1276 size buffer was used, resulting in syntax errors when an expansion
1279 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1280 version 3.3.6 or later.
1282 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1283 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1284 both become "event_action", the variables become $event_name, $event_data
1285 and $event_defer_errno. There is a new variable $verify_mode, usable in
1286 routers, transports and related events. The tls:cert event is now also
1287 raised for inbound connections, if the main configuration event_action
1290 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1291 early OCSP support, but no stapling (appears to be less than 1.0.0).
1293 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1294 server certificate names available under the smtp transport option
1295 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1298 JH/10 Time-related extraction expansions from certificates now use the main
1299 option "timezone" setting for output formatting, and are consistent
1300 between OpenSSL and GnuTLS compilations. Bug 1541.
1302 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1303 encoded parameter in the incoming message. Bug 1558.
1305 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1306 include certificate info, eximon was claiming there were spoolfile
1309 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1311 JH/14 Log delivery-related information more consistently, using the sequence
1312 "H=<name> [<ip>]" wherever possible.
1314 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1315 are problematic for Debian distribution, omit them from the release
1318 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1320 JH/16 Fix string representation of time values on 64bit time_t architectures.
1323 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1324 output list separator was used.
1329 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1330 checkers that were complaining about end of non-void function with no
1333 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1334 This was a regression introduced in 4.83 by another bugfix.
1336 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1338 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1339 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1345 TF/01 Correctly close the server side of TLS when forking for delivery.
1347 When a message was received over SMTP with TLS, Exim failed to clear up
1348 the incoming connection properly after forking off the child process to
1349 deliver the message. In some situations the subsequent outgoing
1350 delivery connection happened to have the same fd number as the incoming
1351 connection previously had. Exim would try to use TLS and fail, logging
1352 a "Bad file descriptor" error.
1354 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1355 utilities have not been installed.
1357 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1358 temporary space as the ACL may create new global variables.
1360 TL/01 LDAP support uses per connection or global context settings, depending
1361 upon the detected version of the libraries at build time.
1363 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1364 to extract and use the src ip:port in logging and expansions as if it
1365 were a direct connection from the outside internet. PPv2 support was
1366 updated based on HAProxy spec change in May 2014.
1368 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1370 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1371 Properly escape header and check for NULL return.
1373 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1376 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1378 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1379 characters in header names, implemented as a verify condition.
1380 Contributed by Michael Fischer v. Mollard.
1382 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1383 results permerror and temperror. Previous values are deprecated but
1384 still accepted. In a future release, err_perm and err_temp will be
1385 completely removed, which will be a backward incompatibility if the
1386 ACL tests for either of these two old results. Patch contributed by
1387 user bes-internal on the mailing list.
1389 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1391 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1392 selectors, in both main and reject logs.
1394 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1397 JH/07 Add malware type "sock" for talking to simple daemon.
1399 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1401 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1402 routers/transports under cutthrough routing.
1404 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1405 numbers. Touch up "bool" conditional to keep the same definition.
1407 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1409 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1411 JH/12 Expand items in router/transport headers_add or headers_remove lists
1412 individually rather than the list as a whole. Bug 1452.
1414 Required for reasonable handling of multiple headers_ options when
1415 they may be empty; requires that headers_remove items with embedded
1416 colons must have them doubled (or the list-separator changed).
1418 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1419 view the policy declared in the DMARC record. Currently, $dmarc_status
1420 is a combined value of both the record presence and the result of the
1423 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1425 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1426 dnslookup router and the smtp transport (applying to the forward
1429 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1430 of ldap servers used for a specific lookup. Patch provided by Heiko
1433 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1434 New variable $lookup_dnssec_authenticated for observability.
1436 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1437 Patch submitted by Lars Timman.
1439 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1441 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1442 Requires trusted mode and valid format message id, aborts otherwise.
1443 Patch contributed by Heiko Schlichting.
1445 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1446 certextract with support for various fields. Bug 1358.
1448 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1449 is requested by default, modifiable by smtp transport option
1452 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1453 operate on certificate variables to give certificate fingerprints
1454 Also new ${sha256:cert_variable}.
1456 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1458 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1459 Christian Aistleitner.
1461 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1463 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1464 file. Patch from Wolfgang Breyha.
1466 JH/25 Expand the coverage of the delivery $host and $host_address to
1467 client authenticators run in verify callout. Bug 1476.
1469 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1470 align with daemon_smtp_ports. Bug 72.
1472 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1473 support and error reporting did not work properly.
1475 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1476 and is readable. Patch from Andrew Colin Kissa.
1478 TL/14 Enhance documentation of ${run expansion and how it parses the
1479 commandline after expansion, particularly in the case when an
1480 unquoted variable expansion results in an empty value.
1482 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1484 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1485 by renaming away from it. Addresses GH issue 15, reported by
1488 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1490 TL/15 SECURITY: prevent double expansion in math comparison functions
1491 (can expand unsanitized data). Not remotely exploitable.
1498 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1500 PP/02 Make -n do something, by making it not do something.
1501 When combined with -bP, the name of an option is not output.
1503 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1506 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1507 $sender_host_name and config options to manage this, and basic check
1510 PP/05 DSCP support for outbound connections and control modifier for inbound.
1512 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1513 (Only plugin which currently uses this is kerberos4, which nobody should
1514 be using, but we should make it available and other future plugins might
1515 conceivably use it, even though it would break NAT; stuff *should* be
1516 using channel bindings instead).
1518 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1519 name; added for Sendmail compatibility; requires admin caller.
1520 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1521 just ignore it); requires trusted caller.
1522 Also parse but ignore: -Ac -Am -X<logfile>
1525 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1527 TL/02 Add +smtp_confirmation as a default logging option.
1529 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1530 Patch by Magnus Holmgren from 2007-02-20.
1532 TL/04 Bugzilla 1281 - Spec typo.
1533 Bugzilla 1283 - Spec typo.
1534 Bugzilla 1290 - Spec grammar fixes.
1536 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1538 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1540 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1541 mailing list by by Dmitry Isaikin.
1543 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1545 JH/02 Support "G" suffix to numbers in ${if comparisons.
1547 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1549 NM/01 Bugzilla 1197 - Spec typo
1550 Bugzilla 1196 - Spec examples corrections
1552 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1554 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1555 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1558 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1559 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1561 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1562 "acl {{name}{arg}...}", and optional args on acl condition
1565 JH/05 Permit multiple router/transport headers_add/remove lines.
1567 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1569 JH/07 Avoid using a waiting database for a single-message-only transport.
1570 Performance patch from Paul Fisher. Bugzilla 1262.
1572 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1575 JH/09 Add $headers_added variable, with content from use of ACL modifier
1576 add_header (but not yet added to the message). Bugzilla 199.
1578 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1579 Pulled from Bugzilla 817 by Wolfgang Breyha.
1581 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1583 (nb: this is the same fix as in Exim 4.80.1)
1585 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1588 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1591 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1593 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1594 advertise SMTP AUTH mechanism to us, instead of a generic
1595 protocol violation error. Also, make Exim more robust to bad
1596 data from the Dovecot auth socket.
1598 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1600 When a queue runner is handling a message, Exim first routes the
1601 recipient addresses, during which it prunes them based on the retry
1602 hints database. After that it attempts to deliver the message to
1603 any remaining recipients. It then updates the hints database using
1606 So if a recipient address works intermittently, it can get repeatedly
1607 deferred at routing time. The retry hints record remains fresh so the
1608 address never reaches the final cutoff time.
1610 This is a fairly common occurrence when a user is bumping up against
1611 their storage quota. Exim had some logic in its local delivery code
1612 to deal with this. However it did not apply to per-recipient defers
1613 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1615 This change adds a proper retry rule check during routing so that the
1616 final cutoff time is checked against the message's age. We only do
1617 this check if there is an address retry record and there is not a
1618 domain retry record; this implies that previous attempts to handle
1619 the address had the retry_use_local_parts option turned on. We use
1620 this as an approximation for the destination being like a local
1621 delivery, as in LMTP.
1623 I suspect this new check makes the old local delivery cutoff check
1624 redundant, but I have not verified this so I left the code in place.
1626 TF/02 Correct gecos expansion when From: is a prefix of the username.
1628 Test 0254 submits a message to Exim with the header
1632 When I ran the test suite under the user fanf2, Exim expanded
1633 the header to contain my full name, whereas it should have added
1634 a Resent-Sender: header. It erroneously treats any prefix of the
1635 username as equal to the username.
1637 This change corrects that bug.
1639 GF/01 DCC debug and logging tidyup
1640 Error conditions log to paniclog rather than rejectlog.
1641 Debug lines prefixed by "DCC: " to remove any ambiguity.
1643 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1645 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1646 Bug spotted by Jeremy Harris; was flawed since initial commit.
1647 Would have resulted in OCSP responses post-SNI triggering an Exim
1648 NULL dereference and crash.
1650 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1652 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1653 Bug detection, analysis and fix by Samuel Thibault.
1654 Bugzilla 1331, Debian bug #698092.
1656 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1658 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1659 Server implementation by Todd Lyons, client by JH.
1660 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1661 config variable "prdr_enable" controls whether the server
1662 advertises the facility. If the client requests PRDR a new
1663 acl_data_smtp_prdr ACL is called once for each recipient, after
1664 the body content is received and before the acl_smtp_data ACL.
1665 The client is controlled by both of: a hosts_try_prdr option
1666 on the smtp transport, and the server advertisement.
1667 Default client logging of deliveries and rejections involving
1668 PRDR are flagged with the string "PRDR".
1670 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1671 fclose(). Diagnosis by Todd Lyons.
1673 PP/17 Update configure.default to handle IPv6 localhost better.
1674 Patch by Alain Williams (plus minor tweaks).
1677 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1678 This is now consistent with GnuTLS, and is now documented: the
1679 previous undocumented portable approach to treating the option as
1680 unset was to force an expansion failure. That still works, and
1681 an empty string is now equivalent.
1683 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1684 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1685 not performing validation itself.
1687 PP/20 Added force_command boolean option to pipe transport.
1688 Patch from Nick Koston, of cPanel Inc.
1690 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1693 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1695 PP/21 Fix eximon continuous updating with timestamped log-files.
1696 Broken in a format-string cleanup in 4.80, missed when I repaired the
1697 other false fix of the same issue.
1698 Report and fix from Heiko Schlichting.
1701 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1702 Report from Prashanth Katuri.
1704 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1705 It's SecureTransport, so affects any MacOS clients which use the
1706 system-integrated TLS libraries, including email clients.
1708 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1709 using a MIME ACL for non-SMTP local injection.
1710 Report and assistance in diagnosis by Warren Baker.
1712 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1714 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1716 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1717 last id that failed so it may be referenced in subsequent ACL's.
1719 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1722 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1723 ldap library initialization, allowing self-signed CA's to be
1724 used. Also properly sets require_cert option later in code by
1725 using NULL (global ldap config) instead of ldap handle (per
1726 session). Bug diagnosis and testing by alxgomz.
1728 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1729 the src/util/ subdirectory.
1731 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1732 renamed to Transport Post Delivery Action by Jeremy Harris, as
1735 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1736 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1737 redis_servers = needs to be configured which will be used by the redis
1738 lookup. Patch from Warren Baker, of The Packet Hub.
1740 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1742 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1743 hostname or reverse DNS when processing a host list. Used suggestions
1744 from multiple comments on this bug.
1746 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1748 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1749 Missed a few lines, added it to make the runtest require no keyboard
1752 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1753 contains upper case chars. Make router use caseful_local_part.
1755 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1756 support when GnuTLS has been built with p11-kit.
1762 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1764 This, or similar/improved, will also be change PP/11 of 4.82.
1770 PP/01 Handle short writes when writing local log-files.
1771 In practice, only affects FreeBSD (8 onwards).
1772 Bugzilla 1053, with thanks to Dmitry Isaikin.
1774 NM/01 Bugzilla 949 - Documentation tweak
1776 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1779 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1781 PP/02 Implemented gsasl authenticator.
1783 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1785 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1786 `pkg-config foo` for cflags/libs.
1788 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1789 with rest of GSASL and with heimdal_gssapi.
1791 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1792 `pkg-config foo` for cflags/libs for the TLS implementation.
1794 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1795 properties get this fed in as external SSF. A number of robustness
1796 and debugging improvements to the cyrus_sasl authenticator.
1798 PP/08 cyrus_sasl server now expands the server_realm option.
1800 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1801 Patch by Jeremy Harris.
1803 PP/10 Added dbmjz lookup type.
1805 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1807 PP/12 MAIL args handles TAB as well as SP, for better interop with
1808 non-compliant senders.
1809 Analysis and variant patch by Todd Lyons.
1811 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1812 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1813 Patch from Dirk Mueller <dmueller@suse.com>
1815 PP/13 tls_peerdn now print-escaped for spool files.
1816 Observed some $tls_peerdn in wild which contained \n, which resulted
1817 in spool file corruption.
1819 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1820 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1821 or write after TLS renegotiation, which otherwise led to messages
1824 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1825 as a tracking header (ie: a signed header comes before the signature).
1826 Patch from Wolfgang Breyha.
1828 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1829 comma-sep list; embedded commas doubled.
1831 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1833 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1835 Report and patch from Dmitry Banschikov.
1837 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1838 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1839 failures. We appear to now support TLS1.1+ with Exim.
1841 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1842 lets Exim select keys and certificates based upon TLS SNI from client.
1843 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1844 before an outbound SMTP session. New log_selector, +tls_sni.
1846 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1847 NULL dereference. Report and patch from Alun Jones.
1849 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1850 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1851 Not seeing resolver debug output on NetBSD, but suspect this is a
1852 resolver implementation change.
1854 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1855 Left warnings. Added "eximon gdb" invocation mode.
1857 PP/21 Defaulting "accept_8bitmime" to true, not false.
1859 PP/22 Added -bw for inetd wait mode support.
1861 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1862 locate the relevant includes and libraries. Made this the default.
1864 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1865 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1867 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1868 This may cause build issues on older platforms.
1870 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1871 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1872 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1873 Added SNI support via GnuTLS too.
1874 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1876 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1878 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1879 Applied second patch from Janne, implementing suggestion to default
1880 multiple-strings-in-record handling to match SPF spec.
1882 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1884 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1885 read-only, out of scope).
1886 Patch from Wolfgang Breyha, report from Stuart Northfield.
1888 PP/29 Fix three issues highlighted by clang analyser static analysis.
1889 Only crash-plausible issue would require the Cambridge-specific
1890 iplookup router and a misconfiguration.
1891 Report from Marcin Mirosław.
1893 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1895 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1896 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1897 As part of this, removing so much warning spew let me fix some minor
1898 real issues in debug logging.
1900 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1901 assignment on my part. Fixed.
1903 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1904 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1905 Janne Snabb (who went above and beyond: thank you).
1907 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1908 string otherwise requires a connection and a bunch more work and it's
1909 relatively easy to get wrong. Should also expose TLS library linkage
1912 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1913 64-bit ${eval} (JH/03).
1915 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1916 GNU libc to support some of the 64-bit stuff, should not lead to
1917 conflicts. Defined before os.h is pulled in, so if a given platform
1918 needs to override this, it can.
1920 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1921 protection layer was required, which is not implemented.
1922 Bugzilla 1254, patch from Wolfgang Breyha.
1924 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1925 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1926 tls_dhparam take prime identifiers. Also unbreak combination of
1927 OpenSSL+DH_params+TLSSNI.
1929 PP/39 Disable SSLv2 by default in OpenSSL support.
1935 PP/01 Solaris build fix for Oracle's LDAP libraries.
1936 Bugzilla 1109, patch from Stephen Usher.
1938 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1940 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1943 TF/02 Fix a couple more cases where we did not log the error message
1944 when unlink() failed. See also change 4.74-TF/03.
1946 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1947 lock up or crash if it happened to be inside a call to libc when it
1948 got a SIGUSR1 from exiwhat.
1950 The SIGUSR1 handler appends the current process status to the process
1951 log which is later printed by exiwhat. It used to use the general
1952 purpose logging code to do this, but several functions it calls are
1953 not safe for signals.
1955 The new output code in the SIGUSR1 handler is specific to the process
1956 log, and simple enough that it's easy to inspect for signal safety.
1957 Removing some special cases also simplifies the general logging code.
1958 Removing the spurious timestamps from the process log simplifies
1961 TF/04 Improved ratelimit ACL condition.
1963 The /noupdate option has been deprecated in favour of /readonly which
1964 has clearer semantics. The /leaky, /strict, and /readonly update modes
1965 are mutually exclusive. The update mode is no longer included in the
1966 database key; it just determines when the database is updated. (This
1967 means that when you upgrade Exim will forget old rate measurements.)
1969 Exim now checks that the per_* options are used with an update mode that
1970 makes sense for the current ACL. For example, when Exim is processing a
1971 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1972 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1973 must specify per_mail/readonly. If you omit the update mode it defaults to
1974 /leaky where that makes sense (as before) or /readonly where required.
1976 The /noupdate option is now undocumented but still supported for
1977 backwards compatibility. It is equivalent to /readonly except that in
1978 ACLs where /readonly is required you may specify /leaky/noupdate or
1979 /strict/noupdate which are treated the same as /readonly.
1981 A useful new feature is the /count= option. This is a generalization
1982 of the per_byte option, so that you can measure the throughput of other
1983 aggregate values. For example, the per_byte option is now equivalent
1984 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1986 The per_rcpt option has been generalized using the /count= mechanism
1987 (though it's more complicated than the per_byte equivalence). When it is
1988 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1989 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1990 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1991 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1992 Note that using per_rcpt with a non-readonly update mode in more than
1993 one ACL will cause the recipients to be double-counted. (The per_mail
1994 and per_byte options don't have this problem.)
1996 The handling of very low rates has changed slightly. If the computed rate
1997 is less than the event's count (usually one) then this event is the first
1998 after a long gap. In this case the rate is set to the same as this event's
1999 count, so that the first message of a spam run is counted properly.
2001 The major new feature is a mechanism for counting the rate of unique
2002 events. The new per_addr option counts the number of different
2003 recipients that someone has sent messages to in the last time period. It
2004 behaves like per_rcpt if all the recipient addresses are different, but
2005 duplicate recipient addresses do not increase the measured rate. Like
2006 the /count= option this is a general mechanism, so the per_addr option
2007 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2008 example, measure the rate that a client uses different sender addresses
2009 with the options per_mail/unique=$sender_address. There are further
2010 details in the main documentation.
2012 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2014 TF/06 Removed a few PCRE remnants.
2016 TF/07 Automatically extract Exim's version number from tags in the git
2017 repository when doing development or release builds.
2019 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2020 Bugzilla 879. Patch from Paul Fisher.
2022 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2023 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2026 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2028 PP/05 Variable $av_failed, true if the AV scanner deferred.
2029 Bugzilla 1078. Patch from John Horne.
2031 PP/06 Stop make process more reliably on build failure.
2032 Bugzilla 1087. Patch from Heiko Schlittermann.
2034 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2035 Bugzilla 1089. Patch from Heiko Schlittermann.
2037 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2038 Bugzilla 1131. Patch from Holger Weiß.
2040 PP/09 Handle IPv6 addresses with SPF.
2041 Bugzilla 860. Patch from Wolfgang Breyha.
2043 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2045 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2048 PP/11 match_* no longer expand right-hand-side by default.
2049 New compile-time build option, EXPAND_LISTMATCH_RHS.
2050 New expansion conditions, "inlist", "inlisti".
2052 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2054 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2056 PP/14 fix log_write() format string regression from TF/03.
2057 Bugzilla 1152. Patch from Dmitry Isaikin.
2063 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2065 PP/02 Harmonised TLS library version reporting; only show if debugging.
2066 Layout now matches that introduced for other libraries in 4.74 PP/03.
2068 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2070 PP/04 New "dns_use_edns0" global option.
2072 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2075 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2076 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2078 TK/01 Updated PolarSSL code to 0.14.2.
2079 Bugzilla 1097. Patch from Andreas Metzler.
2081 PP/07 Catch divide-by-zero in ${eval:...}.
2082 Fixes bugzilla 1102.
2084 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2087 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2088 format-string attack -- SECURITY: remote arbitrary code execution.
2090 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2091 time unintentionally subject to list matching rules, letting the header
2092 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2093 arbitrary string expansion). This allowed for information disclosure.
2095 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2096 INT_MIN/-1 -- value coerced to INT_MAX.
2102 NM/01 Workaround for PCRE version dependency in version reporting
2105 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2106 This fixes portability to compilers other than gcc, notably
2107 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2109 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2110 makefiles for portability to HP-UX and POSIX correctness.
2112 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2113 Also via indented variable definition in the Makefile.
2114 (Debugging by Oliver Heesakkers).
2116 PP/02 Restore caching of spamd results with expanded spamd_address.
2117 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2119 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2120 Improves build reliability. Fix from: Frank Elsner
2122 NM/02 Fix wide character breakage in the rfc2047 coding
2123 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2125 NM/03 Allow underscore in dnslist lookups
2126 Fixes bug 1026. Patch from Graeme Fowler
2128 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2129 Code patches from Adam Ciarcinski of NetBSD.
2131 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2134 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2135 is logged, to avoid truncation. Patch from John Horne.
2137 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2138 Patch from Jakob Hirsch.
2140 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2141 SQL string expansion failure details.
2142 Patch from Andrey Oktyabrski.
2144 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2145 Patch from Simon Arlott.
2147 PP/09 New lookups functionality failed to compile on old gcc which rejects
2148 extern declarations in function scope.
2149 Patch from Oliver Fleischmann
2151 PP/10 Use sig_atomic_t for flags set from signal handlers.
2152 Check getgroups() return and improve debugging.
2153 Fixed developed for diagnosis in bug 927 (which turned out to be
2156 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2157 Patch from Mark Zealey.
2159 PP/12 Bugzilla 1056: Improved spamd server selection.
2160 Patch from Mark Zealey.
2162 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2163 Based on patch from Heiko Schlittermann.
2165 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2166 Patch from Uwe Doering, sign-off by Michael Haardt.
2168 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2169 variable declaration deep within a block. Bug and patch from
2172 PP/15 lookups-Makefile IRIX compatibility coercion.
2174 PP/16 Make DISABLE_DKIM build knob functional.
2176 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2177 Patch by Simon Arlott
2179 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2180 variable argument macros. Our copy now differs from upstream.
2186 TF/01 Failure to get a lock on a hints database can have serious
2187 consequences so log it to the panic log.
2189 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2190 controlled using the smtp_confirmation log selector.
2192 TF/03 Include the error message when we fail to unlink a spool file.
2194 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2195 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2196 for maintaining out-of-tree patches for some time.
2198 PP/01 Bugzilla 139: Documentation and portability issues.
2199 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2200 Handle per-OS dynamic-module compilation flags.
2202 PP/02 Let /dev/null have normal permissions.
2203 The 4.73 fixes were a little too stringent and complained about the
2204 permissions on /dev/null. Exempt it from some checks.
2205 Reported by Andreas M. Kirchwitz.
2207 PP/03 Report version information for many libraries, including
2208 Exim version information for dynamically loaded libraries. Created
2209 version.h, now support a version extension string for distributors
2210 who patch heavily. Dynamic module ABI change.
2212 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2213 privilege escalation vulnerability whereby the Exim run-time user
2214 can cause root to append content of the attacker's choosing to
2217 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2220 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2221 If dropping privileges for untrusted macros, we disabled normal logging
2222 on the basis that it would fail; for the Exim run-time user, this is not
2223 the case, and it resulted in successful deliveries going unlogged.
2224 Fixed. Reported by Andreas Metzler.
2230 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2231 only prepend for the Resent-* case. Fixes regression introduced in
2232 Exim 4.70 by NM/22 for Bugzilla 607.
2234 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2235 increasing numbers of administrators be bitten by this.
2237 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2239 PP/03 Bugzilla 994: added openssl_options main configuration option.
2241 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2243 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2245 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2247 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2248 without a peer certificate, leading to a segfault because of an
2249 assumption that peers always have certificates. Be a little more
2250 paranoid. Problem reported by Martin Tscholak.
2252 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2253 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2254 NB: ClamAV planning to remove STREAM in "middle of 2010".
2255 CL also introduces -bmalware, various -d+acl logging additions and
2256 more caution in buffer sizes.
2258 PP/09 Implemented reverse_ip expansion operator.
2260 PP/10 Bugzilla 937: provide a "debug" ACL control.
2262 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2264 PP/12 Bugzilla 973: Implement --version.
2266 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2268 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2270 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2272 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2273 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2274 ignore trailing whitespace.
2276 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2278 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2281 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2282 Notification from Dr Andrew Aitchison.
2284 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2285 ExtendedDetectionInfo response format.
2286 Notification from John Horne.
2288 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2291 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2292 XSL and documented dependency on system catalogs, with examples of how
2295 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2298 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2299 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2300 configuration file which is writeable by the Exim user or group.
2302 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2303 of configuration files to cover files specified with the -C option if
2304 they are going to be used with root privileges, not just the default
2307 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2308 option (effectively making it always true).
2310 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2311 files to be used while preserving root privileges.
2313 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2314 that rogue child processes cannot use them.
2316 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2317 run-time user, instead of root.
2319 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2320 Exim run-time user without dropping privileges.
2322 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2323 result string, instead of calling string_vformat() twice with the same
2326 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2327 for other users. Others should always drop root privileges if they use
2328 -C on the command line, even for a whitelisted configure file.
2330 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2332 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2338 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2339 $data_path, and $header_path variables; fixed documentation bugs and
2342 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2343 exipick to access non-standard spools, including the "frozen" queue
2346 NM/01 Bugzilla 965: Support mysql stored procedures.
2347 Patch from Alain Williams
2349 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2351 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2352 Patch from Andreas Metzler
2354 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2355 Patch from Kirill Miazine
2357 NM/05 Bugzilla 671: Added umask to procmail example.
2359 JJ/03 installed exipick 20100323.0, fixing doc bug
2361 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2362 directory. Notification and patch from Dan Rosenberg.
2364 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2366 TK/02 Improve log output when DKIM signing operation fails.
2368 MH/01 Treat the transport option dkim_domain as a colon separated
2369 list, not as a single string, and sign the message with each element,
2370 omitting multiple occurences of the same signer.
2372 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2373 Bugzilla 985, 986. Patch by Simon Arlott
2375 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2376 Patch by Simon Arlott
2378 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2379 MBX locking. Notification from Dan Rosenberg.
2385 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2387 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2389 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2391 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2393 NM/04 Bugzilla 915: Flag broken perl installation during build.
2399 TK/01 Added patch by Johannes Berg that expands the main option
2400 "spamd_address" if it starts with a dollar sign.
2402 TK/02 Write list of recipients to X-Envelope-Sender header when building
2403 the mbox-format spool file for content scanning (suggested by Jakob
2406 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2407 (http://www.dcc-servers.net/) support via dccifd. Activated by
2408 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2410 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2411 by Mark Daniel Reidel <mr@df.eu>.
2413 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2414 When building exim an external PCRE library is now needed -
2415 PCRE is a system library on the majority of modern systems.
2416 See entry on PCRE_LIBS in EDITME file.
2418 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2419 conversation. Added nologin parameter to request.
2420 Patch contributed by Kirill Miazine.
2422 TF/01 Do not log submission mode rewrites if they do not change the address.
2424 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2426 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2427 log files in place. Contributed by Roberto Lima.
2429 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2431 TF/03 Bugzilla 615: When checking the local_parts router precondition
2432 after a local_part_suffix or local_part_prefix option, Exim now
2433 does not use the address's named list lookup cache, since this
2434 contains cached lookups for the whole local part.
2436 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2437 Robert Millan. Documentation is in experimental-spec.txt.
2439 TF/04 Bugzilla 668: Fix parallel build (make -j).
2441 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2443 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2444 Patch provided by Jan Srzednicki.
2446 TF/05 Leading white space used to be stripped from $spam_report which
2447 wrecked the formatting. Now it is preserved.
2449 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2450 that they are available at delivery time.
2452 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2454 TF/08 TLS error reporting now respects the incoming_interface and
2455 incoming_port log selectors.
2457 TF/09 Produce a more useful error message if an SMTP transport's hosts
2458 setting expands to an empty string.
2460 NM/06 Bugzilla 744: EXPN did not work under TLS.
2461 Patch provided by Phil Pennock.
2463 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2464 Patch provided by Richard Godbee.
2466 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2467 acl_smtp_notquit, added index entry.
2469 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2470 Patch provided by Eugene Bujak.
2472 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2473 accept(). Patch provided by Maxim Dounin.
2475 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2476 Patch provided by Phil Pennock.
2478 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2480 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2481 Patch provided by Brad "anomie" Jorsch.
2483 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2484 Patch provided by Dean Brooks.
2486 TK/05 Add native DKIM support (does not depend on external libraries).
2488 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2489 Patch provided by Graeme Fowler.
2491 NM/16 Bugzilla 851: Documentation example syntax fix.
2493 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2495 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2498 NM/19 Bugzilla 745: TLS version reporting.
2499 Patch provided by Phil Pennock.
2501 NM/20 Bugzilla 167: bool: condition support.
2502 Patch provided by Phil Pennock.
2504 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2505 clients. Patch provided by Phil Pennock.
2507 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2508 Patch provided by Brad "anomie" Jorsch.
2510 NM/23 Bugzilla 687: Fix misparses in eximstats.
2511 Patch provided by Heiko Schlittermann.
2513 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2514 Patch provided by Heiko Schlittermann.
2516 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2517 plus update to original patch.
2519 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2521 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2522 Patch provided by David Brownlee.
2524 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2526 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2528 NM/30 Bugzilla 888: TLS documentation bugfixes.
2530 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2532 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2533 Unlike the original bugzilla I have changed all shell scripts in src tree.
2535 NM/33 Bugzilla 898: Transport filter timeout fix.
2536 Patch by Todd Rinaldo.
2538 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2539 Patch by Serge Demonchaux.
2541 NM/35 Bugzilla 39: Base64 decode bug fixes.
2542 Patch by Jakob Hirsch.
2544 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2546 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2548 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2550 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2556 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2557 ALT-N's libdkim that I have put here:
2558 http://duncanthrax.net/exim-experimental/
2560 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2561 were called 'true' and it seems that C99 defines that as a reserved
2562 keyword to be used with 'bool' variable types. That means you could
2563 not include C99-style headers which use bools without triggering
2564 build errors in sieve.c.
2566 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2567 as mailq or other aliases. Changed the --help handling significantly
2568 to do whats expected. exim_usage() emits usage/help information.
2570 SC/01 Added the -bylocaldomain option to eximstats.
2572 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2574 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2576 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2582 PH/01 Another patch from the Sieve maintainer.
2584 PH/02 When an IPv6 address is converted to a string for single-key lookup
2585 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2586 dots are used instead of colons so that keys in lsearch files need not
2587 contain colons. This was done some time before quoting was made available
2588 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2589 (notated using the quote facility) so as to distinguish them from IPv4
2590 keys. This meant that lookups for IP addresses in host lists did not work
2591 for iplsearch lookups.
2593 This has been fixed by arranging for IPv6 addresses to be expressed with
2594 colons if the lookup type is iplsearch. This is not incompatible, because
2595 previously such lookups could never work.
2597 The situation is now rather anomalous, since one *can* have colons in
2598 ordinary lsearch keys. However, making the change in all cases is
2599 incompatible and would probably break a number of configurations.
2601 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2604 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2605 conversion specification without a maximum field width, thereby enabling
2606 a rogue spamd server to cause a buffer overflow. While nobody in their
2607 right mind would setup Exim to query an untrusted spamd server, an
2608 attacker that gains access to a server running spamd could potentially
2609 exploit this vulnerability to run arbitrary code as the Exim user.
2611 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2612 $primary_hostname instead of what libspf2 thinks the hosts name is.
2614 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2615 a directory entry by the name of the lookup key. Previously, if a
2616 symlink pointed to a non-existing file or a file in a directory that
2617 Exim lacked permissions to read, a lookup for a key matching that
2618 symlink would fail. Now it is enough that a matching directory entry
2619 exists, symlink or not. (Bugzilla 503.)
2621 PH/03 The body_linecount and body_zerocount variables are now exported in the
2624 PH/04 Added the $dnslist_matched variable.
2626 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2627 This means they are set thereafter only if the connection becomes
2630 PH/06 Added the client_condition to authenticators so that some can be skipped
2631 by clients under certain conditions.
2633 PH/07 The error message for a badly-placed control=no_multiline_responses left
2634 "_responses" off the end of the name.
2636 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2638 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2639 (without spaces) instead of just copying the configuration text.
2641 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2643 PH/11 Added $max_received_linelength.
2645 PH/12 Added +ignore_defer and +include_defer to host lists.
2647 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2648 way in which PCRE > 7.0 is built.
2650 PH/14 Implemented queue_only_load_latch.
2652 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2653 MAIL command. The effect was to mangle the value on 64-bit systems.
2655 PH/16 Another patch from the Sieve maintainer.
2657 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2659 PH/18 If a system quota error occurred while trying to create the file for
2660 a maildir delivery, the message "Mailbox is full" was not appended to the
2661 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2662 only to a quota excession during the actual writing of the file.
2664 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2665 characters?) which causes problems in log lines. The DN values are now
2666 passed through string_printing() before being added to log lines.
2668 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2669 and InterBase are left for another time.)
2671 PH/21 Added message_body_newlines option.
2673 PH/22 Guard against possible overflow in moan_check_errorcopy().
2675 PH/23 POSIX allows open() to be a macro; guard against that.
2677 PH/24 If the recipient of an error message contained an @ in the local part
2678 (suitably quoted, of course), incorrect values were put in $domain and
2679 $local_part during the evaluation of errors_copy.
2685 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2686 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2689 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2690 issue a MAIL command.
2692 PH/02 In an ACL statement such as
2694 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2696 if a client was not listed at all, or was listed with a value other than
2697 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2698 the condition was not true (as it should be), so access was not denied.
2699 The bug was that the ! inversion was incorrectly passed on to the second
2700 item. This has been fixed.
2702 PH/03 Added additional dnslists conditions == and =& which are different from
2703 = and & when the dns lookup returns more than one IP address.
2705 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2706 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2708 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2709 FSYNC, which compiles an option called disable_fsync that allows for
2710 bypassing fsync(). The documentation is heavily laced with warnings.
2712 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2714 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2715 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2716 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2717 including adding "make clean"; (3) Added -fPIC when compiling the test
2718 dynamically loaded module, to get rid of a warning.
2720 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2721 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2722 = 0s. The bug is otherwise harmless.
2724 PH/07 There was a bug in the dovecot authenticator such that the value of
2725 $auth1 could be overwritten, and so not correctly preserved, after a
2726 successful authentication. This usually meant that the value preserved by
2727 the server_setid option was incorrect.
2729 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2731 PH/09 Installed PCRE release 7.0.
2733 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2734 run for batched SMTP input. It is now run at the start of every message
2735 in the batch. While fixing this I discovered that the process information
2736 (output by running exiwhat) was not always getting set for -bs and -bS
2737 input. This is fixed, and it now also says "batched" for BSMTP.
2739 PH/11 Added control=no_pipelining.
2741 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2742 patch, slightly modified), and move the expansion of helo_data till after
2743 the connection is made in the smtp transport (so it can use these
2746 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2748 PH/14 Added log_selector = +pid.
2750 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2752 PH/16 Add ${if forany and ${if forall.
2754 PH/17 Added dsn_from option to vary the From: line in DSNs.
2756 PH/18 Flush SMTP output before performing a callout, unless control =
2757 no_callout_flush is set.
2759 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2760 was true (the default) a successful delivery failed to delete the retry
2761 item, thus causing premature timeout of the address. The bug is now
2764 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2766 PH/21 Long custom messages for fakedefer and fakereject are now split up
2767 into multiline responses in the same way that messages for "deny" and
2768 other ACL rejections are.
2770 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2771 with slight modification.
2773 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2774 draft, changing the syntax and factoring some duplicate code".
2776 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2777 for deliveries of the second and subsequent messages over the same SMTP
2780 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2781 ${reduce, with only minor "tidies".
2783 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2785 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2786 expansion side effects.
2788 PH/27 When a message times out after an over-quota error from an Exim-imposed
2789 quota, the bounce message says "mailbox is full". This message was not
2790 being given when it was a system quota that was exceeded. It now should
2793 MH/03 Made $recipients available in local_scan(). local_scan() already has
2794 better access to the recipient list through recipients_list[], but
2795 $recipients can be useful in postmaster-provided expansion strings.
2797 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2798 in the case of a MAIL command with additional options following the
2799 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2800 were accidentally chopped off.
2802 PH/29 SMTP synchronization checks are implemented when a command is read -
2803 there is a check that no more input is waiting when there shouldn't be
2804 any. However, for some commands, a delay in an ACL can mean that it is
2805 some time before the response is written. In this time, more input might
2806 arrive, invalidly. So now there are extra checks after an ACL has run for
2807 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2808 pipelining has not been advertised.
2810 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2812 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2813 returned in the SMTP response when smtp_return_error_details was false.
2814 This has been fixed.
2816 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2817 instead of the C I/O that was originally supplied, because problems were
2818 reported on Solaris.
2820 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2821 Exim which did not show up earlier: it was assuming that a call to
2822 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2823 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2824 was a macro that became an assignment, so it seemed to work. This has
2825 changed to a proper function call with a void return, hence the compile
2826 error. Exim's code has been fixed.
2828 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2831 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2833 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2835 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2836 because it turns out to be too big or there is a timeout) there is no
2837 "Completed" line in the log. When some messages of this type were
2838 selected by exigrep, they were listed as "not completed". Others were
2839 picked up by some special patterns. I have improved the selection
2840 criteria to be more general.
2842 PH/38 The host_find_failed option in the manualroute router can now be set
2843 to "ignore", to completely ignore a host whose IP address cannot be
2844 found. If all hosts are ignored, the behaviour is controlled by the new
2845 host_all_ignored option.
2847 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2848 homing or because of multiple MX records with /mx) generated more than
2849 one IP address, and the following item turned out to be the local host,
2850 all the secondary addresses of the first item were incorrectly removed
2851 from the list, along with the local host and any following hosts (which
2852 is what is supposed to happen).
2854 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2855 whoever called Exim into the -H file. In the case of the daemon it was
2856 behaving confusingly. When first started, it used values for whoever
2857 started the daemon, but after a SIGHUP it used the Exim user (because it
2858 calls itself on a restart). I have changed the code so that it now always
2861 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2862 message are rejected with the same error (e.g. no authentication or bad
2863 sender address), and a DATA command is nevertheless sent (as can happen
2864 with PIPELINING or a stupid MUA), the error message that was given to the
2865 RCPT commands is included in the rejection of the DATA command. This is
2866 intended to be helpful for MUAs that show only the final error to their
2869 PH/42 Another patch from the Sieve maintainer.
2871 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2872 Eximstats - Fixed some broken HTML links and added missing column headers
2874 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2875 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2877 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2879 PH/43 Yet another patch from the Sieve maintainer.
2881 PH/44 I found a way to check for a TCP/IP connection going away before sending
2882 the response to the final '.' that terminates a message, but only in the
2883 case where the client has not sent further data following the '.'
2884 (unfortunately, this is allowed). However, in many cases there won't be
2885 any further data because there won't be any more messages to send. A call
2886 to select() can be used: if it shows that the input is "ready", there is
2887 either input waiting, or the socket has been closed. An attempt to read
2888 the next input character can distinguish the two cases. Previously, Exim
2889 would have sent an OK response which the client would never have see.
2890 This could lead to message repetition. This fix should cure that, at
2891 least in a lot of common cases.
2893 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2894 advertised in response to EHLO.
2900 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2901 fixed by 4.65/MH/01 (is this a record?) are fixed:
2903 (i) An empty string was always treated as zero by the numeric comparison
2904 operators. This behaviour has been restored.
2906 (ii) It is documented that the numeric comparison operators always treat
2907 their arguments as decimal numbers. This was broken in that numbers
2908 starting with 0 were being interpreted as octal.
2910 While fixing these problems I realized that there was another issue that
2911 hadn't been noticed. Values of message_size_limit (both the global option
2912 and the transport option) were treated as octal if they started with 0.
2913 The documentation was vague. These values are now always treated as
2914 decimal, and I will make that clear in the documentation.
2920 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2921 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2924 MH/01 Don't check that the operands of numeric comparison operators are
2925 integers when their expansion is in "skipping" mode (fixes bug
2926 introduced by 4.64-PH/07).
2928 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2929 child addresses, Exim now panics and dies. Previously, because the count
2930 is held in a short int, deliveries were likely to be lost. As such a
2931 large number of recipients for a single message is ridiculous
2932 (performance will be very, very poor), I have chosen to impose a limit
2933 rather than extend the field.
2939 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2940 leftover -K file (the existence of which was triggered by #402).
2941 While we were at it, introduced process PID as part of the -K
2942 filename. This should rule out race conditions when creating
2945 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2946 processing considerably. Previous code took too long for large mails,
2947 triggering a timeout which in turn triggers #401.
2949 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2950 in the DK code in transports.c. sendfile() is not really portable,
2951 hence the _LINUX specificness.
2953 TF/01 In the add_headers option to the mail command in an Exim filter,
2954 there was a bug that Exim would claim a syntax error in any
2955 header after the first one which had an odd number of characters
2958 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2959 callout verification, Exim cached a "reject" for the entire domain. This
2960 is correct for most verifications, but it is not correct for a recipient
2961 verification with use_sender or use_postmaster set, because in that case
2962 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2963 case of MAIL FROM:<> rejection from other early rejections (e.g.
2964 rejection of HELO). When verifying a recipient using a non-null MAIL
2965 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2966 Whatever the result of the callout, the value of the domain cache is
2967 left unchanged (for any other kind of callout, getting as far as trying
2968 RCPT means that the domain itself is ok).
2970 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2973 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2974 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2975 session, the daemon ignores ECONNECT errors and logs others; it now
2976 ignores EPIPE as well.
2978 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2979 (quoted-printable decoding).
2981 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2982 later the small subsequent patch to fix an introduced bug.
2984 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2986 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2988 PH/08 An error is now given if message_size_limit is specified negative.
2990 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2991 to be given (somewhat) arbitrary names.
2993 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2996 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2997 miscellaneous code fixes
2999 PH/10 Added the log_reject_target ACL modifier to specify where to log
3002 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3003 hostname. This is wrong, because it relates to the incoming message (and
3004 probably the interface on which it is arriving) and not to the outgoing
3005 callout (which could be using a different interface). This has been
3006 changed to use the value of the helo_data option from the smtp transport
3007 instead - this is what is used when a message is actually being sent. If
3008 there is no remote transport (possible with a router that sets up host
3009 addresses), $smtp_active_hostname is used.
3011 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3012 tweaks were necessary in order to get it to work (see also 21 below):
3013 (a) The code assumed that strncpy() returns a negative number on buffer
3014 overflow, which isn't the case. Replaced with Exim's string_format()
3016 (b) There were several signed/unsigned issues. I just did the minimum
3017 hacking in of casts. There is scope for a larger refactoring.
3018 (c) The code used strcasecmp() which is not a standard C function.
3019 Replaced with Exim's strcmpic() function.
3020 (d) The code set only $1; it now sets $auth1 as well.
3021 (e) A simple test gave the error "authentication client didn't specify
3022 service in request". It would seem that Dovecot has changed its
3023 interface. Fortunately there's a specification; I followed it and
3024 changed what the client sends and it appears to be working now.
3026 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3029 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3030 address A is aliased to B and C, where B exists and C does not. Without
3031 -v the output is "A verified" because verification stops after a
3032 successful redirection if more than one address is generated. However,
3033 with -v the child addresses are also verified. Exim was outputting "A
3034 failed to verify" and then showing the successful verification for C,
3035 with its parentage. It now outputs "B failed to verify", showing B's
3036 parentage before showing the successful verification of C.
3038 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3039 look up a TXT record in a specific list after matching in a combined
3042 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3043 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3044 they consult the DNS. I had assumed they would set it the way they
3045 wanted; and indeed my experiments on Linux seem to show that in some
3046 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3047 To be on the safe side, however, I have now made the interface to
3048 host_find_byname() similar to host_find_bydns(), with an argument
3049 containing the DNS resolver options. The host_find_byname() function now
3050 sets these options at its start, just as host_find_bydns() does. The smtp
3051 transport options dns_qualify_single and dns_search_parents are passed to
3052 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3053 of host_find_byname() use the default settings of RES_DEFNAMES
3054 (qualify_single) but not RES_DNSRCH (search_parents).
3056 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3057 spool_read_header() do less string testing, by means of a preliminary
3058 switch on the second character of optional "-foo" lines. (This is
3059 overdue, caused by the large number of possibilities that now exist.
3060 Originally there were few.) While I was there, I also converted the
3061 str(n)cmp tests so they don't re-test the leading "-" and the first
3062 character, in the hope this might squeeze out yet more improvement.
3064 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3065 flag allowing group syntax was set by the header_syntax check but not
3066 turned off, possible causing trouble later; (2) The flag was not being
3067 set at all for the header_verify test, causing "group"-style headers to
3068 be rejected. I have now set it in this case, and also caused header_
3069 verify to ignore an empty address taken from a group. While doing this, I
3070 came across some other cases where the code for allowing group syntax
3071 while scanning a header line wasn't quite right (mostly, not resetting
3072 the flag correctly in the right place). These bugs could have caused
3073 trouble for malformed header lines. I hope it is now all correct.
3075 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3076 with the "reply" argument non-NULL. The code, however (which originally
3077 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3078 but it didn't always do it. This confused somebody who was copying the
3079 code for some other use. I have removed all the tests.
3081 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3082 feature that was used to support insecure browsers during the U.S. crypto
3083 embargo. It requires special client support, and Exim is probably the
3084 only MTA that supported it -- and would never use it because real RSA is
3085 always available. This code has been removed, because it had the bad
3086 effect of slowing Exim down by computing (never used) parameters for the
3087 RSA_EXPORT functionality.
3089 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3090 authenticator to fail if there's a tab character in the incoming data
3091 (there should never be unless someone is messing about, as it's supposed
3092 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3093 if the connection is using TLS or if the remote IP is the same as the
3094 local IP, and the "valid-client-cert option" if a client certificate has
3097 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3098 authenticators. This can be used for authorization after authentication
3099 succeeds. (In the case of plaintext, it servers for both authentication
3102 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3103 if any retry times were supplied.
3105 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3106 connection, where there is no client IP address to check. In this
3107 situation, the verify now always succeeds.
3109 PH/25 Applied John Jetmore's -Mset patch.
3111 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3113 PH/27 In a string expansion for a processed (not raw) header when multiple
3114 headers of the same name were present, leading whitespace was being
3115 removed from all of them, but trailing whitespace was being removed only
3116 from the last one. Now trailing whitespace is removed from each header
3117 before concatenation. Completely empty headers in a concatenation (as
3118 before) are ignored.
3120 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3121 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3123 PH/29 [Removed. This was a change that I later backed out, and forgot to
3124 correct the ChangeLog entry (that I had efficiently created) before
3125 committing the later change.]
3127 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3128 address errors (4xx response to RCPT) over the same connection as other
3129 messages routed to the same hosts. Such deliveries are always "forced",
3130 so retry times are not inspected. This resulted in far too many retries
3131 for the affected addresses. The effect occurred only when there were more
3132 hosts than the hosts_max_try setting in the smtp transport when it had
3133 the 4xx errors. Those hosts that it had tried were not added to the list
3134 of hosts for which the message was waiting, so if all were tried, there
3135 was no problem. Two fixes have been applied:
3137 (i) If there are any address or message errors in an SMTP delivery, none
3138 of the hosts (tried or untried) are now added to the list of hosts
3139 for which the message is waiting, so the message should not be a
3140 candidate for sending over the same connection that was used for a
3141 successful delivery of some other message. This seems entirely
3142 reasonable: after all the message is NOT "waiting for some host".
3143 This is so "obvious" that I'm not sure why it wasn't done
3144 previously. Hope I haven't missed anything, but it can't do any
3145 harm, as the worst effect is to miss an optimization.
3147 (ii) If, despite (i), such a delivery is accidentally attempted, the
3148 routing retry time is respected, so at least it doesn't keep
3149 hammering the server.
3151 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3152 in ${readsocket because some servers need this prod.
3154 PH/32 Added some extra debug output when updating a wait-xxx database.
3156 PH/33 The hint "could be header name not terminated by colon", which has been
3157 given for certain expansion errors for a long time, was not being given
3158 for the ${if def:h_colon_omitted{... case.
3160 PH/34 The spec says: "With one important exception, whenever a domain list is
3161 being scanned, $domain contains the subject domain." There was at least
3162 one case where this was not true.
3164 PH/35 The error "getsockname() failed: connection reset by peer" was being
3165 written to the panic log as well as the main log, but it isn't really
3166 panic-worthy as it just means the connection died rather early on. I have
3167 removed the panic log writing for the ECONNRESET error when getsockname()
3170 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3171 runs only) independently of the message's sender address. This meant
3172 that, if the 4xx error was in fact related to the sender, a different
3173 message to the same recipient with a different sender could confuse
3174 things. In particular, this can happen when sending to a greylisting
3175 server, but other circumstances could also provoke similar problems.
3176 I have changed the default so that the retry time for these errors is now
3177 based a combination of the sender and recipient addresses. This change
3178 can be overridden by setting address_retry_include_sender=false in the
3181 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3182 remote server are returned as part of bounce messages. This was not
3183 happening for LMTP over a pipe (the lmtp transport), but now it is the
3184 same for both kinds of LMTP.
3186 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3187 in header lines that were in fact CNAMEs. This is no longer the case.
3189 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3190 and queue runs started by the daemon processed all messages. This has
3191 been fixed so that -R and -S can now usefully be given with -q<time>.
3193 PH/40 Import PCRE release 6.7 (fixes some bugs).
3195 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3197 PH/42 Give an error if -q is specified more than once.
3199 PH/43 Renamed the variables $interface_address and $interface_port as
3200 $received_ip_address and $received_port, to make it clear that these
3201 values apply to message reception, and not to the outgoing interface when
3202 a message is delivered. (The old names remain recognized, of course.)
3204 PH/44 There was no timeout on the connect() call when using a Unix domain
3205 socket in the ${readsocket expansion. There now is.
3207 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3208 be meaningful with "accept".
3210 SC/01 Eximstats V1.43
3211 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3213 SC/02 Eximstats V1.44
3214 Use a glob alias rather than an array ref in the generated
3215 parser. This improves both readability and performance.
3217 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3218 Collect SpamAssassin and rejection statistics.
3219 Don't display local sender or destination tables unless
3220 there is data to show.
3221 Added average volumes into the top table text output.
3223 SC/04 Eximstats V1.46
3224 Collect data on the number of addresses (recipients)
3225 as well as the number of messages.
3227 SC/05 Eximstats V1.47
3228 Added 'Message too big' to the list of mail rejection
3229 reasons (thanks to Marco Gaiarin).
3231 SC/06 Eximstats V1.48
3232 Mainlog lines which have GMT offsets and are too short to
3233 have a flag are now skipped.
3235 SC/07 Eximstats V1.49 (Alain Williams)
3236 Added the -emptyok flag.
3238 SC/08 Eximstats V1.50
3239 Fixes for obtaining the IP address from reject messages.
3241 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3242 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3243 whitespace changes from 4.64-PH/27
3245 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3248 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3249 are found, allow negative numbers in numeric criteria)
3251 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3253 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3254 to match changes made in 4.64-PH/43
3256 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3258 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3259 "domain" is actually an IP address, and force a failure. This locks out
3260 those revolvers/nameservers that support "A-for-A" lookups, in
3261 contravention of the specifications.
3263 PH/48 When a host name was looked up from an IP address, and the subsequent
3264 forward lookup of the name timed out, the host name was left in
3265 $sender_host_name, contrary to the specification.
3267 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3268 restricted to single-key lookups, Exim was not diagnosing an error if
3269 * or *@ was used with a query-style lookup.
3271 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3273 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3274 long ago, but noone interested enough thought of it. Let's just say that
3275 the "1.1" means that there are some new functions that weren't there at
3276 some point in the past.
3278 PH/51 Error processing for expansion failure of helo_data from an smtp
3279 transport during callout processing was broken.
3281 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3282 tested/used via the -bh/-bhc/-bs options.
3284 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3285 bug, fixed in subsequent PCRE releases).
3287 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3288 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3290 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3296 SC/01 Use a glob alias rather than an array ref in eximstats generated
3297 parser. This improves both readability and performance.
3299 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3300 Don't display local sender or destination tables in eximstats unless
3301 there is data to show.
3302 Added average volumes into the eximstats top table text output.
3304 SC/03 Collect data on the number of addresses (recipients) as well
3305 as the number of messages in eximstats.
3307 TF/01 Correct an error in the documentation for the redirect router. Exim
3308 does (usually) call initgroups() when daemonizing.
3310 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3311 with consistent privilege compared to when running as a daemon.
3313 TF/03 Note in the spec that $authenticated_id is not set for local
3314 submissions from trusted users.
3316 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3317 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3319 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3320 by adding some example configuration directives to the default
3321 configuration file. A little bit of work is required to uncomment the
3322 directives and define how usernames and passwords are checked, but
3323 there is now a framework to start from.
3325 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3326 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3327 without this. I don't know how relevant this is to other LDAP libraries.
3329 PH/02 Add the verb name to the "unknown ACL verb" error.
3331 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3333 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3335 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3336 directory not expanded when it should be if an expanded home directory
3337 was set for the address (which is overridden by the transport).
3339 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3342 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3343 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3344 because it is too late at that time, and has no effect.
3346 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3347 security issue with \' (bugzilla #107). I could not use the
3348 PQescapeStringConn() function, because it needs a PGconn value as one of
3351 PH/08 When testing addresses using -bt, indicate those final addresses that
3352 are duplicates that would not cause an additional delivery. At least one
3353 person was confused, thinking that -bt output corresponded to deliveries.
3354 (Suppressing duplicates isn't a good idea as you lose the information
3355 about possibly different redirections that led to the duplicates.)
3357 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3358 systems where poll() doesn't work, in particular OS X.
3360 PH/10 Added more information to debugging output for retry time not reached.
3362 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3363 operations in malware.c.
3365 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3368 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3369 syslog_duplication set false, log lines that would normally be written
3370 both the the main log and to the reject log were not written to syslog at
3373 PH/14 In the default configuration, change the use of "message" in ACL warn
3374 statements to "add_header".
3376 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3377 not followed by a command (e.g. "seen endif").
3379 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3380 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3383 PH/17 Added extra conditions to the default value of delay_warning_condition
3387 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3388 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3389 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3392 The Auto-Submitted: and various List- headers are standardised, whereas I
3393 don't think Precedence: ever was.
3395 PH/18 Refactored debugging code in route_finduser() to show more information,
3396 in particular, the error code if getpwnam() issues one.
3398 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3399 This is apparently needed in addition to the PH/07 change above to avoid
3400 any possible encoding problems.
3402 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3403 but not after initializing Perl.
3405 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3406 output them only if debugging. By default they are written stderr,
3407 apparently, which is not desirable.
3409 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3412 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3415 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3417 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3418 authenticated or an ident call has been made. Suppress the default
3419 values for $authenticated_id and $authenticated_sender (but permit -oMai
3420 and -oMas) when testing with -bh.
3422 PH/24 Re-jigged the order of the tests in the default configuration so that the
3423 tests for valid domains and recipients precede the DNS black list and CSA
3424 tests, on the grounds that those ones are more expensive.
3426 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3427 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3428 This bug exists in every version of Exim that I still have, right back to
3431 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3432 However, an attempt to turn on case-sensitivity in a regex key by
3433 including (?-i) didn't work because the subject string was already
3434 lowercased, and the effects were non-intuitive. It turns out that a
3435 one-line patch can be used to allow (?-i) to work as expected.
3441 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3442 other effects) broke the use of negated acl sub-conditions.
3444 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3447 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3448 "Deny" causes Exim to reject the incoming connection with a 554 error.
3449 Unfortunately, if there is a major crisis, such as a disk failure,
3450 tcp-wrappers gives "deny", whereas what one would like would be some
3451 kind of temporary error. A kludge has been added to help with this.
3452 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3453 554 error is used if errno is still zero or contains ENOENT (which occurs
3454 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3457 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3459 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3460 errors. Otherwise a message that provokes a temporary error (when other
3461 messages do not) can cause a whole host to time out.
3463 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3464 addresses were routed directly to files or pipes from a redirect router.
3465 File deliveries just didn't batch; pipe deliveries might have suffered
3468 PH/06 A failure to get a lock for a hints database would erroneously always say
3469 "Failed to get write lock", even when it was really a read lock.
3471 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3472 of 0600. This has been changed to use the value of the lockfile_mode
3473 option (which defaults to 0600).
3475 PH/08 Applied small patch from the Sieve maintainer.
3477 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3478 folder from quota calculations, a direct delivery into this folder messed
3479 up the contents of the maildirsize file. This was because the regex was
3480 used only to exclude .Trash (or whatever) when the size of the mailbox
3481 was calculated. There was no check that a delivery was happening into an
3482 excluded directory. This bug has been fixed by ignoring all quota
3483 processing for deliveries into excluded directories.
3485 PH/10 Added the maildirfolder_create_regex option to appendfile.
3491 PH/01 The code for finding all the local interface addresses on a FreeBSD
3492 system running IPv6 was broken. This may well have applied to all BSD
3493 systems, as well as to others that have similar system calls. The broken
3494 code found IPv4 interfaces correctly, but gave incorrect values for the
3495 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3496 that it would not match correctly against @[] and not recognize the IPv6
3499 PH/02 The ipliteral router was not recognizing addresses of the form user@
3500 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3502 PH/03 Added disable_ipv6.
3504 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3505 decoded form, because it is most often used to construct To: headers
3506 lines in autoreplies, and the decoded form may well be syntactically
3507 invalid. However, $reply_address has leading white space removed, and all
3508 newlines turned into spaces so that the autoreply transport does not
3511 PH/05 If group was specified without a user on a router, and no group or user
3512 was specified on a transport, the group from the router was ignored.
3514 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3515 for visible compile-time settings that can be used to change these
3516 numbers, for those that want even more. Backwards compatibility with old
3517 spool files has been maintained. However, going back to a previous Exim
3518 release will lost any variables that are in spool files.
3520 PH/07 Two small changes when running in the test harness: increase delay when
3521 passing a TCP/IP connection to a new process, in case the original
3522 process has to generate a bounce, and remove special handling of
3523 127.0.0.2 (sic), which is no longer necessary.
3525 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3526 be the same on different OS.
3528 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3531 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3532 whether --show-vars was specified or not
3534 JJ/02 exipick: Added support for new ACL variable spool format introduced
3537 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3538 syntactically invalid From: or Reply-to: line, and a filter used this to
3539 generate an autoreply, and therefore failed to obtain an address for the
3540 autoreply, Exim could try to deliver to a non-existent relative file
3541 name, causing unrelated and misleading errors. What now happens is that
3542 it logs this as a hard delivery error, but does not attempt to create a
3545 PH/11 The exinext utility has a -C option for testing purposes, but although
3546 the given file was scanned by exinext itself; it wasn't being passed on
3547 when Exim was called.
3549 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3550 an end-of-file indication when reading a command response.
3552 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3553 compiled. In many other places in Exim, IPv6 addresses are always
3554 recognized, so I have changed this. It also means that IPv4 domain
3555 literals of the form [IPV4:n.n.n.n] are now always recognized.
3557 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3558 used if the router is not running as root, for example, when verifying at
3559 ACL time, or when using -bh. The debugging output from this situation was
3560 non-existent - all you got was a failure to exec. I have made two
3563 (a) Failures to set uid/gid, the current directory, or a process leader
3564 in a subprocess such as that created by queryprogram now generate
3565 suitable debugging output when -d is set.
3567 (b) The queryprogram router detects when it is not running as root,
3568 outputs suitable debugging information if -d is set, and then runs
3569 the subprocess without attempting to change uid/gid.
3571 PH/15 Minor change to Makefile for building test_host (undocumented testing
3574 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3575 additional section of a DNS packet that returns MX or SRV records.
3576 Instead, it always explicitly searches for A/AAAA records. This avoids
3577 major problems that occur when a DNS server includes only records of one
3578 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3579 fixed another bug: if SRV records were looked up and the corresponding
3580 address records were *not* found in the additional section, the port
3581 values from the SRV records were lost.
3583 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3584 using the correct key (the original address) when searching the retry
3585 rules in order to find which one to use for generating the retry hint.
3587 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3588 adding the default one. Similarly, if it contains a Reply-To: header, the
3589 errors_reply_to option, if set, is not used.
3591 PH/19 When calculating a retry time, Exim used to measure the "time since
3592 failure" by looking at the "first failed" field in the retry record. Now
3593 it does not use this if it is later than than the arrival time of the
3594 message. Instead it uses the arrival time. This makes for better
3595 behaviour in cases where some deliveries succeed, thus re-setting the
3596 "first failed" field. An example is a quota failure for a huge message
3597 when small messages continue to be delivered. Without this change, the
3598 "time since failure" will always be short, possible causing more frequent
3599 delivery attempts for the huge message than are intended.
3600 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3602 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3603 $1, $2, $3) because the numerical variables can be reset during some
3604 expansion items (e.g. "match"), thereby losing the authentication data.
3606 PH/21 Make -bV show the size of off_t variables so that the test suite can
3607 decide whether to run tests for quotas > 2G.
3609 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3610 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3611 filecount value is greater than 2G or if a quota value is greater than 2G
3612 on a system where the size of off_t is not greater than 4, a panic error
3615 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3616 never match. The debug and -bh output now contains an explicit error
3617 message indicating a malformed IPv4 address or mask.
3619 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3620 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3621 PH/23 above applies.
3623 PH/25 Do not write to syslog when running in the test harness. The only
3624 occasion when this arises is a failure to open the main or panic logs
3625 (for which there is an explicit test).
3627 PH/26 Added the /no_tell option to "control=freeze".
3629 PH/27 If a host name lookup failed very early in a connection, for example, if
3630 the IP address matched host_lookup and the reverse lookup yielded a name
3631 that did not have a forward lookup, an error message of the form "no IP
3632 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3633 could be logged. Now it outputs the IP address instead of "NULL".
3635 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3636 allows the sender and the authenticated sender to be set when
3637 submitting a message from within Exim. Since child_open_exim() is
3638 documented for local_scan(), the new function should be too.
3640 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3641 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3642 results in an empty string is now treated as unset.
3644 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3646 PH/31 Added sender_verify_fail logging option.
3648 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3649 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3650 tidied the source and removed it altogether.
3652 PH/33 When a queue run was abandoned because the load average was too high, a
3653 log line was always written; now it is written only if the queue_run log
3654 selector is set. In addition, the log line for abandonment now contains
3655 information about the queue run such as the pid. This is always present
3656 in "start" and "stop" lines but was omitted from the "abandon" line.
3658 PH/34 Omit spaces between a header name and the colon in the error message that
3659 is given when verify = headers_syntax fails (if there are lots of them,
3660 the message gets confusing).
3662 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3663 names, as there are now some PTR records that contain slashes. This check
3664 is only to protect against broken name servers that fall over on strange
3665 characters, so the fact that it applies to all lookups doesn't matter.
3667 PH/36 Now that the new test suite is complete, we can remove some of the
3668 special code in Exim that was needed for the old test suite. For example,
3669 sorting DNS records because real resolvers return them in an arbitrary
3670 order. The new test suite's fake resolver always returns records in the
3673 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3674 bounces) except when queue_only is set, to avoid logging races between
3675 the different processes.
3677 PH/38 Panic-die if .include specifies a non-absolute path.
3679 PH/39 A tweak to the "H" retry rule from its user.
3681 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3682 a label. They prevented compilation on older perls.
3684 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3685 a warning to be raised on newish perls.
3687 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3688 on queue. Changes to match documented behaviour of showing count of
3689 messages matching specified criteria.
3691 PH/40 Changed the default ident timeout from 30s to 5s.
3693 PH/41 Added support for the use of login_cap features, on those BSD systems
3694 that have them, for controlling the resources used by pipe deliveries.
3696 PH/42 The content-scanning code uses fopen() to create files in which to put
3697 message data. Previously it was not paying any attention to the mode of
3698 the files. Exim runs with umask(0) because the rest of the code creates
3699 files with open(), and sets the required mode explicitly. Thus, these
3700 files were ending up world-writeable. This was not a big issue, because,
3701 being within the spool directory, they were not world-accessible. I have
3702 created a function called modefopen, which takes an additional mode
3703 argument. It sets umask(777), creates the file, chmods it to the required
3704 mode, then resets the umask. All the relevant calls to fopen() in the
3705 content scanning code have been changed to use this function.
3707 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3708 to 24 hours. This avoids potential overflow problems when processing G
3709 and H retry rules. I suspect nobody ever tinkers with this value.
3711 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3713 PH/45 When the plaintext authenticator is running as a client, the server's
3714 challenges are checked to ensure they are valid base64 strings. By
3715 default, the authentication attempt is cancelled if an invalid string is
3716 received. Setting client_ignore_invalid_base64 true ignores these errors.
3717 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3718 they are received. Thus, the responses can be made to depend on the
3719 challenges. If an invalid string is ignored, an empty string is placed in
3722 PH/46 Messages that are created by the autoreply transport now contains a
3723 References: header, in accordance with RFCs 2822 and 3834.
3725 PH/47 Added authenticated_sender_force to the smtp transport.
3727 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3729 PH/49 Installed latest patch from the Sieve maintainer.
3731 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3732 was also set, the appendfile transport was unnecessarily scanning a
3733 directory of message files (e.g. for maildir delivery) to find the count
3734 of files (along with the size), even though it did not need this
3735 information. It now does the scan only if it needs to find either the
3736 size of the count of files.
3738 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3740 PH/52 Two bugs concerned with error handling when the smtp transport is
3743 (i) Exim was not creating retry information for temporary errors given
3744 for individual recipients after the DATA command when the smtp transport
3745 was used in LMTP mode. This meant that they could be retried too
3746 frequently, and not timed out correctly.
3748 (ii) Exim was setting the flag that allows error details to be returned
3749 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3750 recipients that were returned after the DATA command.
3752 PH/53 This is related to PH/52, but is more general: for any failing address,
3753 when detailed error information was permitted to be returned to the
3754 sender, but the error was temporary, then after the final timeout, only
3755 "retry timeout exceeded" was returned. Now it returns the full error as
3756 well as "retry timeout exceeded".
3758 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3759 do this, and (what is worse) MTAs that accept it.
3761 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3762 will now be deprecated.
3764 PH/56 New os.c-cygwin from the Cygwin maintainer.
3766 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3767 formats (previously only available in exim formats via -bpr, -bpru,
3768 and -bpra. Now also available in native and exiqgrep formats)
3770 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3771 with very large, slow to parse queues
3773 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3775 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3777 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3778 responses to authentication challenges, though it was showing the
3779 challenges; (ii) I've removed the CR characters from the debug output for
3782 PH/58 Allow for the insertion of a newline as well as a space when a string
3783 is turned into more than one encoded-word during RFC 2047 encoding. The
3784 Sieve code now uses this.
3786 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3787 data_4xx, lost_connection, tls_required.
3789 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3790 message was being sent as an SMTP response.
3792 PH/61 Add -l and -k options to exicyclog.
3794 PH/62 When verifying, if an address was redirected to one new address, so that
3795 verification continued, and the new address failed or deferred after
3796 having set something in $address_data, the value of $address_data was not
3797 passed back to the ACL. This was different to the case when no
3798 redirection occurred. The value is now passed back in both cases.
3800 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3801 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3802 use login_cap.h, so on its own it isn't the distinguishing feature. The
3803 new name refers directly to the setclassresources() function.
3805 PH/65 Added configuration files for NetBSD3.
3807 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3809 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3810 is preferred over IPv4.
3812 PH/68 The bounce_return_message and bounce_return_body options were not being
3813 honoured for bounces generated during the reception of non-SMTP messages.
3814 In particular, this applied to messages rejected by the ACL. This bug has
3815 been fixed. However, if bounce_return_message is true and bounce_return_
3816 body is false, the headers that are returned for a non-SMTP message
3817 include only those that have been read before the error was detected.
3818 (In the case of an ACL rejection, they have all been read.)
3820 PH/69 The HTML version of the specification is now built in a directory called
3821 spec_html instead of spec.html, because the latter looks like a path with
3822 a MIME-type, and this confuses some software.
3824 PH/70 Catch two compiler warnings in sieve.c.
3826 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3827 function verify_get_ident() calls ip_connect() to connect a socket, but
3828 if the "connect()" function timed out, ip_connect() used to close the
3829 socket. However, verify_get_ident() also closes the socket later, and in
3830 between Exim writes to the log, which may get opened at this point. When
3831 the socket was closed in ip_connect(), the log could get the same file
3832 descriptor number as the socket. This naturally causes chaos. The fix is
3833 not to close the socket in ip_connect(); the socket should be closed by
3834 the function that creates it. There was only one place in the code where
3835 this was missing, in the iplookup router, which I don't think anybody now
3836 uses, but I've fixed it anyway.
3838 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3839 well as to direct DNS lookups. Otherwise the handling of names in host
3840 lists is inconsistent and therefore confusing.
3846 PH/01 Two changes to the default runtime configuration:
3848 (1) Move the checks for relay_from_hosts and authenticated clients from
3849 after to before the (commented out) DNS black list checks.
3851 (2) Add control=submission to the relay_from_hosts and authenticated
3852 clients checks, on the grounds that messages accepted by these
3853 statements are most likely to be submissions.
3855 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3857 (1) Generate an error if the third argument for the ${prvs expansion is
3860 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3863 (3) Reset the variables that are obtained from the first argument of
3864 ${prvscheck and used in the second argument before leaving the code,
3865 because their memory is reclaimed, so using them afterwards may do
3868 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3869 one (it's much easier than Tom thought :-).
3871 (5) Because of (4), we can now allow for the use of $prvscheck_result
3872 inside the third argument.
3874 PH/03 For some reason, the default setting of PATH when running a command from
3875 a pipe transport was just "/usr/bin". I have changed it to
3878 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3879 anything to be listed in the output from -bV.
3881 PH/05 When a filter generated an autoreply, the entire To: header line was
3882 quoted in the delivery log line, like this:
3884 => >A.N.Other <ano@some.domain> <original@ddress> ...
3886 This has been changed so that it extracts the operative address. There
3887 may be more than one such address. If so, they are comma-separated, like
3890 => >ano@some.domain,ona@other.domain <original@ddress> ...
3892 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3893 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3894 not being looked up in the rDNS to get a host name, Exim was showing the
3895 IP address twice in Received: lines, even though the IP addresses were
3896 identical. For example:
3898 Received: from [1.2.3.4] (helo=[1.2.3.4])
3900 However, if the real host name was known, it was omitting the HELO data
3901 if it matched the actual IP address. This has been tidied up so that it
3902 doesn't show the same IP address twice.
3904 PH/07 When both +timestamp and +memory debugging was on, the value given by
3905 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3906 called by the debug printing, thereby overwriting the timestamp buffer.
3907 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3909 PH/08 When the original message was included in an autoreply transport, it
3910 always said "this is a copy of the message, including all the headers",
3911 even if body_only or headers_only was set. It now gives an appropriate
3914 PH/09 Applied a patch from the Sieve maintainer which:
3916 o fixes some comments
3917 o adds the (disabled) notify extension core
3918 o adds some debug output for the result of if/elsif tests
3919 o points to the current vacation draft in the documentation
3920 and documents the missing references header update
3924 o fixes a bug in processing the envelope test (when testing
3925 multiple envelope elements, the last element determined the
3928 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3929 Electronic Mail") by including:
3931 Auto-submitted: auto-generated
3933 in the messages that it generates (bounce messages and others, such as
3934 warnings). In the case of bounce messages for non-SMTP messages, there was
3935 also a typo: it was using "Auto_submitted" (underscore instead of
3936 hyphen). Since every message generated by Exim is necessarily in response
3937 to another message, thes have all been changed to:
3939 Auto-Submitted: auto-replied
3941 in accordance with these statements in the RFC:
3943 The auto-replied keyword:
3945 - SHOULD be used on messages sent in direct response to another
3946 message by an automatic process,
3948 - MUST NOT be used on manually-generated messages,
3950 - MAY be used on Delivery Status Notifications (DSNs) and Message
3951 Disposition Notifications (MDNs),
3953 - MUST NOT be used on messages generated by automatic or periodic
3954 processes, except for messages which are automatic responses to
3957 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3958 to the default Received: header definition.
3960 PH/12 Added log selector acl_warn_skipped (default on).
3962 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3963 variables because (a) they are in the wrong storage pool and (b) even if
3964 they were copied, it wouldn't work properly because of the caching.
3966 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3967 checking when decoding. Apparently there are clients that generate
3968 overlong encoded strings. Why am I not surprised?
3970 PH/15 If the first argument of "${if match_address" was not empty, but did not
3971 contain an "@" character, Exim crashed. Now it writes a panic log message
3972 and treats the condition as false.
3974 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3976 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3977 extension "envelope-auth". The code is finished and in agreement with
3978 other implementations, but there is no documentation so far and in fact,
3979 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3980 not changing the active code.
3982 Print executed "if" and "elsif" statements when debugging is used. This
3983 helps a great deal to understand what a filter does.
3985 Document more things not specified clearly in RFC3028. I had all this
3986 sorted out, when out of a sudden new issues came to my mind. Oops."
3988 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3991 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3992 canonical form (as documented). However, after a host name lookup from
3993 the IP address, check_host() was doing a simple string comparison with
3994 addresses acquired from the DNS when checking that the found name did
3995 have the original IP as one of its addresses. Since any found IPv6
3996 addresses are likely to be in abbreviated form, the comparison could
3997 fail. Luckily, there already exists a function for doing the comparison
3998 by converting both addresses to binary, so now that is used instead of
3999 the text comparison.
4001 PH/20 There was another similar case to PH/19, when a complete host name was
4002 given in a host list; looking up its IP address could give an abbreviated
4003 form, whereas the current host's name might or might not be abbreviated.
4004 The same fix has been applied.
4010 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4011 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4014 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4015 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4017 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4019 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4020 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4021 Also, for "Auto-Submitted", treat anything other than "no" as
4022 non-personal, in accordance with RFC 3834. (Previously it treated
4023 anything starting "auto-" as non-personal.)
4025 TF/01 The control=submission/name=... option had a problem with syntax
4026 errors if the name included a slash character. The /name= option
4027 now slurps the rest of the string, so it can include any characters
4028 but it must come last in the list of options (after /sender_retain
4031 PH/05 Some modifications to the interface to the fake nameserver for the new
4039 TK/01 Added the "success_on_redirect" address verification option. See
4040 NewStuff for rationale and an example.
4042 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4044 PH/02 Patch to exigrep to allow it to work on syslog lines.
4046 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4047 fread() to skip over the body file's header line, because in Cygwin the
4048 header line is locked and is inaccessible.
4050 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4051 co-exist for some time) to make it clear that it is the Exim ID that is
4052 referenced, not the Message-ID: header line.
4054 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4055 string_format() function, because snprintf() does not exist on all
4058 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4059 ${stat: expansion item.
4061 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4062 protocol synchronization error", to keep the pedants happy.
4064 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4065 well as for IRIX systems, when gcc is being used. See the host.c source
4068 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4070 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4073 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4074 transport and to the smtp transport in LMTP mode.
4076 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4078 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4079 run a filter in a subprocess. This could lead to confusion in subsequent
4080 lookups in the parent process. There should also be a search_tidyup() at
4081 the end of the subprocess.
4083 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4084 only if the host matched helo_try_verify_hosts, which caused the
4085 verification to occur when the EHLO/HELO command was issued. The ACL just
4086 tested the remembered result. Now, if a previous verification attempt has
4087 not happened, "verify = helo" does it there and then.
4089 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4091 TK/03 Fix log output including CR from clamd.
4093 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4094 exist provoked a memory error which could cause a segfault.
4096 PH/15 Installed PCRE 6.2
4098 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4100 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4101 of the problem. Specifically, suggested +O2 rather than +O1 for the
4104 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4106 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4107 record, the port was not correctly logged when the outgoing_port log
4108 selector was set (it logged the transort's default port).
4110 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4111 fallback_hosts, and "hosts" in the smtp transport.
4113 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4114 host errors such as "Connection refused".
4116 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4117 authentication with radiusclient 0.4.9:
4119 - Error returned from rc_read_config was caught wrongly
4120 - Username/password not passed on to radius server due to wrong length.
4122 The presumption is that some radiusclient API changes for 4.51/PH/17
4123 were not taken care of correctly. The code is still untested by me (my
4124 Linux distribution still has 0.3.2 of radiusclient), but it was
4125 contributed by a Radius user.
4127 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4128 expanding the "port" option of the smtp transport.
4130 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4131 while reading a MIME header. Thanks to Tom Hughes for a patch.
4133 PH/24 Include config.h inside local_scan.h so that configuration settings are
4136 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4137 that in an ACL for RCPT (for example), you can examine exactly what was
4140 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4141 commands, but it was not correctly comparing the address with the actual
4142 client host address. Thus, it would show the EHLO address in Received:
4143 header lines when this was not necessary.
4145 PH/27 Added the % operator to ${eval:}.
4147 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4148 it should be ignoring failures (because with -C, for example, it has lost
4149 privilege). It wasn't ignoring creation failures other than "already
4152 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4155 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4156 because an input line was too long, either on its own, or by virtue of
4157 too many continuations, the temporary file was not being removed, and the
4158 return code was incorrect.
4160 PH/31 Missing "BOOL" in function definition in filtertest.c.
4162 PH/32 Applied Sieve patches from the maintainer.
4164 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4166 PH/33 Added "verify = not_blind".
4168 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4169 Local/Makefile (with some defaults set). These are used in built scripts
4170 such as exicyclog, but they have never been used in the exim_install
4171 script (though there are many overriding facilities there). I have
4172 arranged that the exim_install script now takes note of these two
4175 PH/35 Installed configuration files for Dragonfly.
4177 PH/36 When a locally submitted message by a trusted user did not contain a
4178 From: header, and the sender address was obtained from -f or from an SMTP
4179 MAIL command, and the trusted user did not use -F to supply a sender
4180 name, $originator_name was incorrectly used when constructing a From:
4181 header. Furthermore, $originator_name was used for submission mode
4182 messages from external hosts without From: headers in a similar way,
4183 which is clearly wrong.
4185 PH/37 Added control=suppress_local_fixups.
4187 PH/38 When log_selector = +received_sender was set, and the addition of the
4188 sender made the log line's construction buffer exactly full, or one byte
4189 less than full, an overflow happened when the terminating "\n" was
4192 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4193 when the result of a list match is failure because a DNS lookup failed.
4195 PH/40 RM_COMMAND is now used in the building process.
4197 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4198 the "build-* directories that it finds.
4200 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4201 address in a domain literal was a prefix of an interface address.
4203 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4204 when verifying a sender address, unless rewrite_headers is false.
4206 PH/44 Wrote a long comment about why errors_to addresses are verified as
4207 recipients, not senders.
4209 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4210 the ratelimit ACL was added.
4212 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4214 PH/46 Added extra information about PostgreSQL errors to the error string.
4216 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4217 avoiding the need to install special zones in a real server. This is
4218 backwards compatible; if it can't find the fake resolver, it drops back.
4219 Thus, both old and new test suites can be run.
4221 TF/02 Added util/ratelimit.pl
4223 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4224 clock is set back in time.
4226 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4227 Candler <B.Candler@pobox.com>.
4229 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4230 OK for addresses that are the result of redirections.
4232 PH/48 A number of further additions for the benefit of the new test suite,
4233 including a fake gethostbyname() that interfaces to the fake DNS resolver
4236 TF/06 The fix for widen_domains has also been applied to qualify_single and
4237 search_parents which are the other dnslookup options that can cause
4240 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4243 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4245 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4246 service" if it encountered an MX record with an empty target hostname.
4247 The message is now "an MX or SRV record indicated no SMTP service".
4249 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4250 if the DNS of the sending site is misconfigured. This is quite a
4251 common situation. This change restores the behaviour of treating a
4252 helo verification defer as a failure.
4254 PH/51 If self=fail was set on a router, the bounce message did not include the
4255 actual error message.
4261 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4263 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4264 command itself ended in error, the underlying message about the transport
4265 filter timeout was being overwritten with the pipe command error. Now the
4266 underlying error message should be appended to the second error message.
4268 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4270 PH/02 Reduce the amount of output that "make" produces by default. Full output
4271 can still be requested.
4273 PH/03 The warning log line about a condition test deferring for a "warn" verb
4274 was being output only once per connection, rather than after each
4275 occurrence (because it was using the same function as for successful
4276 "warn" verbs). This seems wrong, so I have changed it.
4278 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4279 it should not have, which might have caused a crash in the right
4280 circumstances, but probably never did.
4282 PH/04 Installed a modified version of Tony Finch's patch to make submission
4283 mode fix the return path as well as the Sender: header line, and to
4284 add a /name= option so that you can make the user's friendly name appear
4287 TF/03 Added the control = fakedefer ACL modifier.
4289 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4290 Mark Lowes for thorough testing.
4292 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4294 TK/03 Merged latest SRS patch from Miles Wilton.
4296 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4297 with the definition in sysexits.h (which is #included earlier).
4298 Fortunately, Exim does not actually use EX_OK. The code used to try to
4299 preserve the sysexits.h value, by assuming that macro definitions were
4300 scanned for macro replacements. I have been disabused of this notion,
4301 so now the code just undefines EX_OK before #including unistd.h.
4303 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4304 in the smtp transport. When a block could not be written in a single
4305 write() function, the timeout was being re-applied to each part-write.
4306 This seems wrong - if the receiver was accepting one byte at a time it
4307 would take for ever. The timeout is now adjusted when this happens. It
4308 doesn't have to be particularly precise.
4310 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4311 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4313 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4314 without a domain if the check to <postmaster@domain> fails.
4316 SC/01 Eximstats: added -xls and the ability to specify output files
4317 (patch written by Frank Heydlauf).
4319 SC/02 Eximstats: use FileHandles for outputting results.
4321 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4323 SC/04 Eximstats: fixed display of large numbers with -nvr option
4325 SC/05 Eximstats: fixed merging of reports with empty tables.
4327 SC/06 Eximstats: added the -include_original_destination flag
4329 SC/07 Eximstats: removed tabs and trailing whitespace.
4331 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4333 TK/06 MBOX spool code: Add real "From " MBOX separator line
4334 so the .eml file is really in mbox format (even though
4335 most programs do not really care). Patch from Alex Miller.
4337 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4338 The latter is generated from $received_to and is only set if the
4339 message has one envelope recipient. SA can use these headers,
4340 obviously out-of-the-box. Patch from Alex Miller.
4342 PH/08 The ${def test on a variable was returning false if the variable's
4343 value was "0", contrary to what the specification has always said!
4344 The result should be true unless the variable is empty.
4346 PH/09 The syntax error of a character other than { following "${if
4347 def:variable_name" (after optional whitespace) was not being diagnosed.
4348 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4349 accidental colon was present, for example, could give incorrect results.
4351 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4352 result is used (not including appendfile, where other changes are about
4355 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4356 This involved changing a lot of size variables from int to off_t. It
4357 should work with maildirs and everything.
4359 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4360 spamd dying while we are connected to it.
4362 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4365 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4366 function for BDB 4.3.
4368 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4370 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4371 the sources for PCRE have been re-arranged and more files are now
4374 PH/15 The code I had for printing potentially long long variables in PH/11
4375 above was not the best (it lost precision). The length of off_t variables
4376 is now inspected at build time, and an appropriate printing format (%ld
4377 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4378 to be "long long int" or "long int". This is needed for the internal
4379 formatting function string_vformat().
4381 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4382 the configuration file to be ":syslog", then the script "guesses" where
4383 the logs files are, rather than using the compiled in default. In our
4384 case the guess is not the same as the compiled default, so the script
4385 suddenly stopped working when I started to use syslog. The patch checks
4386 to see if log_file_path is "". If so, it attempts to read it from exim
4387 with no configuration file to get the compiled in version, before it
4388 falls back to the previous guessing code."
4390 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4391 implementing BATV in an Exim configuration. See NewStuff for the gory
4394 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4395 Makefile that are specific to HP-UX.
4397 PH/18 If the "use_postmaster" option was set for a recipient callout together
4398 with the "random" option, the postmaster address was used as the MAIL
4399 FROM address for the random test, but not for the subsequent recipient
4400 test. It is now used for both.
4402 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4403 patch removes a few documentation additions to RFC 3028, because the
4404 latest draft now contains them. It adds the new en;ascii-case comparator
4405 and a new error check for 8bit text in MIME parts. Comparator and
4406 require names are now matched exactly. I enabled the subaddress
4407 extension, but it is not well tested yet (read: it works for me)."
4409 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4410 rework some of the code of TK/09 above to avoid the hardwired use of
4411 "%lld" and "long long". Replaced the call to snprintf() with a call to
4414 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4415 records point to non-existent hosts", "retry timeout exceeded", and
4416 "retry time not reached for any host after a long failure period".
4418 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4419 experimental DomainKeys support:
4421 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4422 (2) On an error such as an illegally used "control", the wrong name for
4423 the control was given.
4425 These problems did NOT occur unless DomainKeys support was compiled.
4427 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4429 PH/24 Added ${if match_ip condition.
4431 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4432 databases so that it will be absolutely obvious if a crash occurs in the
4433 DB library. This is a regular occurrence (often caused by mis-matched
4436 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4437 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4438 picked up on a user's system that detects such things. There doesn't seem
4439 to be a gcc warning option for this - only an attribute that has to be
4440 put on the function's prototype. It seems that in Fedora Core 4 they have
4441 set this on a number of new functions. No doubt there will be more in due
4444 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4445 specify a transport. However, if an address that was verified by such a
4446 router was the subject of a callout, Exim crashed because it tried to
4447 read the rcpt_include_affixes from the non-existent transport. Now it
4448 just assumes that the setting of that option is false. This bug was
4449 introduced by 4.51/PH/31.
4451 PH/28 Changed -d+all to exclude +memory, because that information is very
4452 rarely of interest, but it makes the output a lot bigger. People tend to
4453 do -d+all out of habit.
4455 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4456 code in os-type was giving problems when libc.so lives in lib64, like on
4459 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4460 aren't the modern standard, and it seems that some systems' include files
4461 don't always have them. Exim was already checking for some of the newer
4462 ones like T_AAAA, and defining it itself. I've added checks for all the
4463 record types that Exim uses.
4465 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4466 not automatically generating a new one, as it is supposed to. This
4467 prevented TLS from working. If the file did exist, but contained invalid
4468 data, a new version was generated, as expected. It was only the case of a
4469 non-existent file that was broken.
4471 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4472 with a change in libdomainkeys > 0.64.
4474 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4475 from DNS. If the selector record carries the flag, it now has
4476 precedence over the domain-wide flag.
4478 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4480 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4481 the use of a port name that isn't defined in /etc/services) occurred, the
4482 message was deferred as in a normal delivery, and thus remained on the
4483 spool, instead of being failed because of the mua_wrapper setting. This
4484 is now fixed, and I tidied up some of the mua_wrapper messages at the
4487 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4488 the messages in a hash of arrays rather than using individual hashes.
4489 This is a bit cleaner and results in dramatic memory savings, albeit
4490 at a slight CPU cost.
4492 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4493 as requested by Marc Sherman.
4495 SC/10 Eximstats: added histograms for user specified patterns as requested
4498 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4500 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4501 fopen() in the content-scanning modules that did not already have it.
4507 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4508 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4510 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4512 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4514 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4515 to test Sieve filters that use "vacation".
4517 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4518 that changes the way the GnuTLS parameters are stored in the cache file.
4519 The new format can be generated externally. For backward compatibility,
4520 if the data in the cache doesn't make sense, Exim assumes it has read an
4521 old-format file, and it generates new data and writes a new file. This
4522 means that you can't go back to an older release without removing the
4525 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4526 work if there are any delivery delays because "one_time" forces the
4527 parent to be marked "delivered", so its unseen clone is never tried
4528 again. For this reason, Exim now forbids the simultaneous setting of
4531 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4532 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4533 entry if you want to know the details. The fix, however, neglected to
4534 consider the case when local delivery batching is involved. The test for
4535 "previously delivered" was not happening when checking to see if an
4536 address could be batched with a previous (undelivered) one; under
4537 certain circumstances this could lead to multiple deliveries to the same
4540 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4541 in its include files, and this causes problems building Exim.
4543 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4544 header_syntax) but Exim was just ignoring anything given after a slash.
4545 In particular, this caused confusion with an attempt to use "verify =
4546 reverse_host_lookup/defer_ok". An error is now given when options are
4547 supplied for verify items that do not have them. (Maybe reverse_host_
4548 lookup should have a defer_ok option, but that's a different point.)
4550 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4551 defined by RFC 821) to 2048, because there were problems with some AUTH
4552 commands, and RFC 1869 says the size should be increased for extended
4553 SMTP commands that take arguments.
4555 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4558 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4559 "unknown" error; now it says that the functionality isn't in the binary.
4561 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4562 an address' error message when a string expansion fails (syntax or
4563 whatever). Otherwise the password may appear in the log. Following change
4564 PH/42 below, there is no longer a chance of it appearing in a bounce
4567 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4569 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4570 of its addresses was ever tried. (Bugzilla bug #2.)
4572 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4573 the result incorrectly in the debug output. (It correctly added a newline
4574 to what was transported.)
4576 TF/01 Added $received_time.
4578 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4579 commented out examples of how to interface to a virus scanner and to
4580 SpamAssassin. Also added commented examples of av_scanner and
4581 spamd_address settings.
4583 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4584 and controls are allowed in which ACLs. There were a couple of minor
4585 errors. Some of the entries in the conditions table (which is a table of
4586 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4587 negation of where the condition IS allowed.
4589 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4591 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4592 header file does not have a version number, so I've had to invent a new
4593 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4594 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4595 radiusclient), but it was contributed by a Radius user.
4597 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4598 files or directories, for OpenSSL.
4600 PH/19 When an Exim process that is running as root has to create an Exim log
4601 file, it does so in a subprocess that runs as exim:exim so as to get the
4602 ownership right at creation (otherwise, other Exim processes might see
4603 the file with the wrong ownership). There was no test for failure of this
4604 fork() call, which would lead to the process getting stuck as it waited
4605 for a non-existent subprocess. Forks do occasionally fail when resources
4606 run out. I reviewed all the other calls to fork(); they all seem to check
4609 PH/20 When checking for unexpected SMTP input at connect time (before writing
4610 the banner), Exim was not dealing correctly with a non-positive return
4611 from the read() function. If the client had disconnected by this time,
4612 the result was a log entry for a synchronization error with an empty
4613 string after "input=" when read() returned zero. If read() returned -1
4614 (an event I could not check), uninitialized data bytes were printed.
4615 There were reports of junk text (parts of files, etc) appearing after
4618 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4620 PH/22 Added support for macro redefinition, and (re)definition in between
4621 driver and ACL definitions.
4623 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4624 forgetting to use the resulting value; it was using the unexpanded value.
4626 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4627 hadn't been configured. The fix is from Juergen Kreileder, who
4628 understands it better than I do:
4630 "Here's what I see happening with three configured cyrus_sasl
4631 authenticators configured (plain, login, cram-md5):
4633 On startup auth_cyrus_sasl_init() gets called for each of these.
4634 This means three calls to sasl_listmech() without a specified mech_list.
4635 => SASL tests which mechs of all available mechs actually work
4636 => three warnings about OTP not working
4637 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4639 With the patch, sasl_listmech() also gets called three times. But now
4640 SASL's mech_list option is set to the server_mech specified in the the
4641 authenticator. Or in other words, the answer from sasl_listmech()
4642 gets limited to just the mech you're testing for (which is different
4644 => the return list contains just 'plain' or 'login', 'cram-md5' or
4645 nothing depending on the value of ob->server_mech.
4647 I've just tested the patch: Authentication still works fine,
4648 unavailable mechs specified in the exim configuration are still
4649 caught, and the auth.log warnings about OTP are gone."
4651 PH/25 When debugging is enabled, the contents of the command line are added
4652 to the debugging output, even when log_selector=+arguments is not
4655 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4656 answer is "GNU", and only if the return is "GNU/something" is the answer
4659 PH/27 $acl_verify_message is now set immediately after the failure of a
4660 verification in an ACL, and so is available in subsequent modifiers. In
4661 particular, the message can be preserved by coding like this:
4663 warn !verify = sender
4664 set acl_m0 = $acl_verify_message
4666 Previously, $acl_verify_message was set only while expanding "message"
4667 and "log_message" when a very denied access.
4669 PH/28 Modified OS/os.c-Linux with
4671 -#ifndef OS_LOAD_AVERAGE
4672 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4674 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4675 nomenclature these days.)
4677 PH/29 Installed patch from the Sieve maintainer that adds the options
4678 sieve_useraddress and sieve_subaddress to the redirect router.
4680 PH/30 In these circumstances:
4681 . Two addresses routed to the same list of hosts;
4682 . First host does not offer TLS;
4683 . First host accepts first address;
4684 . First host gives temporary error to second address;
4685 . Second host offers TLS and a TLS session is established;
4686 . Second host accepts second address.
4687 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4688 and peerdn, if requested) that were in fact used only for the second
4691 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4692 attention to any local part prefix or suffix that was matched by the
4693 router that accepted the address. It now behaves in the same way as it
4694 does for delivery: the affixes are removed from the local part unless
4695 rcpt_include_affixes is set on the transport.
4697 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4698 timeout during the DATA phase of an incoming message.
4700 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4701 applied a patch sanctioned by the Sieve maintainer.
4703 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4704 the uid or gid is negative. A case of a negative gid caused this to be
4705 noticed. The fix allows for either to be negative.
4707 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4708 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4711 PH/36 The change PH/12 above was broken. Fixed it.
4713 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4714 the grounds that routing the same address twice would always produce the
4715 same answer. This might have been true once, but it is certainly no
4716 longer true now. Routing a child address may depend on the previous
4717 routing that produced that child. Some complicated redirection strategies
4718 went wrong when messages had multiple recipients, and made Exim's
4719 behaviour dependent on the order in which the addresses were given.
4721 I have moved the duplicate checking until after the routing is complete.
4722 Exim scans the addresses that are assigned to local and remote
4723 transports, and removes any duplicates. This means that more work will be
4724 done, as duplicates will always all be routed, but duplicates are
4725 presumably rare, so I don't expect this is of any significance.
4727 For deliveries to pipes, files, and autoreplies, the duplicate checking
4728 still happens during the routing process, since they are not going to be
4731 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4732 It corrects a timeout issue with spamd. This is Ian's comment: "The
4733 background is that sometimes spamd either never reads data from a
4734 connection it has accepted, or it never writes response data. The exiscan
4735 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4736 blindly assumes that writes won't block so it may never time out."
4738 PH/39 Allow G after quota size as well as K and M.
4740 PH/40 The value set for $authenticated_id in an authenticator may not contain
4741 binary zeroes or newlines because the value is written to log lines and
4742 to spool files. There was no check on this. Now the value is run through
4743 the string_printing() function so that such characters are converted to
4744 printable escape sequences.
4746 PH/41 $message_linecount is a new variable that contains the total number of
4747 lines in the message. Compare $body_linecount, which is the count for the
4750 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4751 bounce and delay warning messages, except in certain special cases, which
4754 (a) An SMTP error message from a remote host;
4755 (b) A message specified in a :fail: redirection;
4756 (c) A message specified in a "fail" command in a system filter;
4757 (d) A message specified in a FAIL return from the queryprogram router;
4758 (e) A message specified by the cannot_route_message router option.
4760 In these cases only, Exim does include the error details in bounce and
4761 warning messages. There are also a few cases where bland messages such
4762 as "unrouteable address" or "local delivery error" are given.
4764 PH/43 $value is now also set for the "else" part of a ${run expansion.
4766 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4767 being worked on, but at least Exim now implements the latest version to
4770 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4771 process to complete was treated as a delivery failure, a timeout while
4772 writing the message to the pipe was logged, but erroneously treated as a
4773 successful delivery. Such timeouts include transport filter timeouts. For
4774 consistency with the overall process timeout, these timeouts are now
4775 treated as errors, giving rise to delivery failures by default. However,
4776 there is now a new Boolean option for the pipe transport called
4777 timeout_defer, which, if set TRUE, converts the failures into defers for
4778 both kinds of timeout. A transport filter timeout is now identified in
4781 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4782 systems where "make" and "gmake" are different, calling "gmake" at top
4783 level broke things. I've arranged for the value of $(MAKE) to be passed
4784 from the Makefile to this script so that it can call the same version of
4788 A note about Exim versions 4.44 and 4.50
4789 ----------------------------------------
4791 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4792 changes of various kinds. As a consequence, a big documentation update was
4793 needed. This delayed the release for rather longer than seemed good, especially
4794 in the light of a couple of (minor) security issues. Therefore, the changes
4795 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4796 release. So 4.44 and 4.50 are in effect two different branches that both start
4799 I have left the 4.50 change log unchanged; it contains all the changes since
4800 4.43. The change log for 4.44 is below; many of its items are identical to
4801 those for 4.50. This seems to be the most sensible way to preserve the
4802 historical information.
4808 1. Minor wording change to the doc/README.SIEVE file.
4810 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4811 computation of the current number of files was incorrect.
4813 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4814 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4817 4. Give more explanation in the error message when the command for a transport
4818 filter fails to execute.
4820 5. There are several places where Exim runs a non-Exim command in a
4821 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4822 was being done only for the command run by the queryprogram router. It is
4823 now done for all such subprocesses. The other cases are: ${run, transport
4824 filters, and the commands run by the lmtp and pipe transports.
4826 6. Added CONFIGURE_GROUP build-time option.
4828 7. Some older OS have a limit of 256 on the maximum number of file
4829 descriptors. Exim was using setrlimit() to set 1000 as a large value
4830 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4831 systems. I've change it so that if it can't get 1000, it tries for 256.
4833 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4834 was an oversight, and furthermore, ever since the addition of extra
4835 controls (e.g. 4.43/32), the checks on when to allow different forms of
4836 "control" were broken. There should now be diagnostics for all cases when a
4837 control that does not make sense is encountered.
4839 9. Added the /retain_sender option to "control=submission".
4841 10. $recipients is now available in the predata ACL (oversight).
4843 11. Tidy the search cache before the fork to do a delivery from a message
4844 received from the command line. Otherwise the child will trigger a lookup
4845 failure and thereby defer the delivery if it tries to use (for example) a
4846 cached ldap connection that the parent has called unbind on.
4848 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4849 of $address_data from the recipient verification was clobbered by the
4850 sender verification.
4852 13. The value of address_data from a sender verification is now available in
4853 $sender_address_data in subsequent conditions in the ACL statement.
4855 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4857 15. Added a new option "connect=<time>" to callout options, to set a different
4860 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4861 was its contents. (It was OK if the option was not defined at all.)
4863 17. A "Completed" log line is now written for messages that are removed from
4864 the spool by the -Mrm option.
4866 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4867 information about exactly what failed.
4869 19. Added -dd to debug only the daemon process.
4871 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4872 handles timeouts, both on the server side and network timeouts. Renamed the
4873 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4875 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4876 It is now set to "smtps".
4878 22. $host_address is now set to the target address during the checking of
4879 ignore_target_hosts.
4881 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4882 being passed; this would have caused $sender_host_name to have been used if
4883 matching the list had actually called for a host name (not very likely,
4884 since this list is usually IP addresses). A host name is now passed as
4887 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4888 code that specifies a non-restarting handler (typically sigaction() in
4889 modern systems) in an attempt to fix a rare and obscure crash bug.
4891 25. Narrowed the window for a race in the daemon that could cause it to ignore
4892 SIGCHLD signals. This is not a major problem, because they are used only to
4893 wake it up if nothing else does.
4895 26. A malformed maildirsize file could cause Exim to calculate negative values
4896 for the mailbox size or file count. Odd effects could occur as a result.
4897 The maildirsize information is now recalculated if the size or filecount
4900 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4901 support for a long time. Removed HAVE_SYS_VFS_H.
4903 28. Installed the latest version of exipick from John Jetmore.
4905 29. In an address list, if the pattern was not a regular expression, an empty
4906 subject address (from a bounce message) matched only if the pattern was an
4907 empty string. Non-empty patterns were not even tested. This was the wrong
4908 because it is perfectly reasonable to use an empty address as part of a
4909 database query. An empty address is now tested by patterns that are
4910 lookups. However, all the other forms of pattern expect the subject to
4911 contain a local part and a domain, and therefore, for them, an empty
4912 address still always fails if the pattern is not itself empty.
4914 30. Exim went into a mad DNS loop when attempting to do a callout where the
4915 host was specified on an smtp transport, and looking it up yielded more
4916 than one IP address.
4918 31. Re-factored the code for checking spool and log partition space into a
4919 function that finds that data and another that does the check. The former
4920 is then used to implement four new variables: $spool_space, $log_space,
4921 $spool_inodes, and $log_inodes.
4923 32. The RFC2047 encoding function was originally intended for short strings
4924 such as real names; it was not keeping to the 75-character limit for
4925 encoded words that the RFC imposes. It now respects the limit, and
4926 generates multiple encoded words if necessary. To be on the safe side, I
4927 have increased the buffer size for the ${rfc2047: expansion operator from
4930 33. It is now permitted to omit both strings after an "if" condition; if the
4931 condition is true, the result is "true". As before, when the second string
4932 is omitted, a false condition yields an empty string. This makes it less
4933 cumbersome to write custom ACL and router conditions.
4935 34. Failure to deliver a bounce message always caused it to be frozen, even if
4936 there was an errors_to setting on the router. The errors_to setting is now
4939 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4940 canonical form (fully expanded) before being placed in
4941 $sender_host_address.
4943 36. The table in the code that translates DNS record types into text (T_A to
4944 "A" for instance) was missing entries for NS and CNAME. It is just possible
4945 that this could have caused confusion if both these types were looked up
4946 for the same domain, because the text type is used as part of Exim's
4947 per-process caching. But the chance of anyone hitting this buglet seems
4950 37. The dnsdb lookup has been extended in a number of ways.
4952 (1) There is a new type, "zns", which walks up the domain tree until it
4953 finds some nameserver records. It should be used with care.
4955 (2) There is a new type, "mxh", which is like "mx" except that it returns
4956 just the host names, not the priorities.
4958 (3) It is now possible to give a list of domains (or IP addresses) to be
4959 looked up. The behaviour when one of the lookups defers can be
4960 controlled by a keyword.
4962 (4) It is now possible to specify the separator character for use when
4963 multiple records are returned.
4965 38. The dnslists ACL condition has been extended: it is now possible to supply
4966 a list of IP addresses and/or domains to be looked up in a particular DNS
4969 39. Added log_selector=+queue_time_overall.
4971 40. When running the queue in the test harness, wait just a tad after forking a
4972 delivery process, to get repeatability of debugging output.
4974 41. Include certificate and key file names in error message when GnuTLS fails
4975 to set them up, because the GnuTLS error message doesn't include the name
4976 of the failing file when there is a problem reading it.
4978 42. Allow both -bf and -bF in the same test run.
4980 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4982 44. The "Exiscan patch" is now merged into the mainline Exim source.
4984 45. Sometimes the final signoff response after QUIT could fail to get
4985 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4986 < 0 before doing a fflush(). This bug looks as though it goes back to the
4987 introduction of TLS in release 3.20, but "sometimes" must have been rare
4988 because the tests only now provoked it.
4990 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4991 (this can affect the format of dates).
4993 47. exim_tidydb, when checking for the continued existence of a message for
4994 which it has found a message-specific retry record, was not finding
4995 messages that were in split spool directories. Consequently, it was
4996 deleting retry records that should have stayed in existence.
4998 48. Steve fixed some bugs in eximstats.
5000 49. The SPA authentication driver was not abandoning authentication and moving
5001 on to the next authenticator when an expansion was forced to fail,
5002 contradicting the general specification for all authenticators. Instead it
5003 was generating a temporary error. It now behaves as specified.
5005 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5006 (the order specifies the preference for clients). The order is now AES256,
5007 AES128, 3DES, ARCFOUR128.
5009 51. Small patch to Sieve code - explicitly set From: when generating an
5012 52. Exim crashed if a remote delivery caused a very long error message to be
5013 recorded - for instance if somebody sent an entire SpamAssassin report back
5014 as a large number of 550 error lines. This bug was coincidentally fixed by
5015 increasing the size of one of Exim's internal buffers (big_buffer) that
5016 happened as part of the Exiscan merge. However, to be on the safe side, I
5017 have made the code more robust (and fixed the comments that describe what
5020 53. Now that there can be additional text after "Completed" in log lines (if
5021 the queue_time_overall log selector is set), a one-byte patch to exigrep
5022 was needed to allow it to recognize "Completed" as not the last thing in
5025 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5026 patch that reportedly fixes this has been added. I am not expert enough to
5027 create a test for it. This is what the patch creator wrote:
5029 "I found a little strange behaviour of ldap code when working with
5030 Windows 2003 AD Domain, where users was placed in more than one
5031 Organization Units. When I tried to give exim partial DN, the exit code
5032 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5033 But simultaneously result of request was absolutely normal ldap result,
5034 so I produce this patch..."
5036 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5037 REFERENCE, so I have modified the code to exclude the patch when that macro
5040 55. Some experimental protocols are using DNS PTR records for new purposes. The
5041 keys for these records are domain names, not reversed IP addresses. The
5042 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5043 leaves it alone. Component reversal etc. now happens only for IP addresses.
5046 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5048 57. Double the size of the debug message buffer (to 2048) so that more of very
5049 long debug lines gets shown.
5051 58. The exicyclog utility now does better if the number of log files to keep
5052 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5054 59. Two changes related to the smtp_active_hostname option:
5056 (1) $smtp_active_hostname is now available as a variable.
5057 (2) The default for smtp_banner uses $smtp_active_hostname instead
5058 of $primary_hostname.
5060 60. The host_aton() function is supposed to be passed a string that is known
5061 to be a valid IP address. However, in the case of IPv6 addresses, it was
5062 not checking this. This is a hostage to fortune. Exim now panics and dies
5063 if the condition is not met. A case was found where this could be provoked
5064 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5065 components; fortuitously, this particular loophole had already been fixed
5066 by change 4.50/55 above.
5068 If there are any other similar loopholes, the new check in host_aton()
5069 itself should stop them being exploited. The report I received stated that
5070 data on the command line could provoke the exploit when Exim was running as
5071 exim, but did not say which command line option was involved. All I could
5072 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5073 running as the user.
5076 61. There was a buffer overflow vulnerability in the SPA authentication code
5077 (which came originally from the Samba project). I have added a test to the
5078 spa_base64_to_bits() function which I hope fixes it.
5081 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5082 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5084 63. The daemon start-up calls getloadavg() while still root for those OS that
5085 need the first call to be done as root, but it missed one case: when
5086 deliver_queue_load_max is set with deliver_drop_privilege. This is
5087 necessary for the benefit of the queue runner, because there is no re-exec
5088 when deliver_drop_privilege is set.
5090 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5091 This has been fixed.
5093 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5094 was in use, was not putting the data itself into the right store pool;
5095 consequently, it could be overwritten for a subsequent message in the same
5096 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5099 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5101 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5102 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5103 the function were treating the return as a boolean value, which happened to
5104 work because 0=false and not-0=true, but is not correct code.
5106 68. The host_aton() function was not handling scoped IPv6 addresses (those
5107 with, for example, "%eth0" on the end) correctly.
5109 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5110 negated items (that is, ~something) in unsigned ints. Some compilers
5111 apparently mutter when there is no cast.
5113 70. If an address verification called from an ACL failed, and did not produce a
5114 user-specific message (i.e. there was only a "system" message), nothing was
5115 put in $acl_verify_message. In this situation, it now puts the system
5118 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5119 session; change 4.31/43 added the unwanted input to the log line - except
5120 that it did not do this in the start of session case. It now does.
5122 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5123 This is wrong and can cause the other end to generate a synchronization
5124 error if it is another Exim or anything else that does the synchronization
5125 check. A QUIT command is no longer sent after a timeout.
5127 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5128 during host lookups.
5130 74. The defer_ok option of callout verification was not working if it was used
5131 when verifying addresses in header lines, that is, for this case:
5133 verify = header_sender/callout=defer_ok
5135 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5136 those file descriptors could be used for SMTP connections. If anything
5137 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5138 could be sent to the SMTP client, causing chaos. The daemon now opens
5139 stdin, stdout, and stderr to /dev/null when it puts itself into the
5142 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5143 log by default. The user can override this with suitable Perl magic.
5145 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5146 the log message when discard triggers, was not working for the DATA ACL or
5147 for the non-SMTP ACL.
5149 78. Error message wording change in sieve.c.
5151 79. If smtp_accept_max_per_host was set, the number of connections could be
5152 restricted to fewer than expected, because the daemon was trying to set up
5153 a new connection before checking whether the processes handling previous
5154 connections had finished. The check for completed processes is now done
5155 earlier. On busy systems, this bug wouldn't be noticed because something
5156 else would have woken the daemon, and it would have reaped the completed
5159 80. If a message was submitted locally by a user whose login name contained one
5160 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5161 It caused a spool format error. I have fixed the spool reading code. A
5162 related problem was that the "from" clause in the Received: line became
5163 illegal because of the space(s). It is now covered by ${quote_local_part.
5165 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5168 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5170 83. Patch from Sieve maintainer to fix unterminated string problem in
5171 "vacation" handling.
5173 84. Some minor changes to the Linux configuration files to help with other
5174 OS variants using glibc.
5176 85. One more patch for Sieve to update vacation handling to latest spec.
5179 ----------------------------------------------------
5180 See the note above about the 4.44 and 4.50 releases.
5181 ----------------------------------------------------
5187 1. Change 4.43/35 introduced a bug that caused file counts to be
5188 incorrectly computed when quota_filecount was set in an appendfile
5191 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5192 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5195 3. Give more explanation in the error message when the command for a transport
5196 filter fails to execute.
5198 4. There are several places where Exim runs a non-Exim command in a
5199 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5200 was being done only for the command run by the queryprogram router. It is
5201 now done for all such subprocesses. The other cases are: ${run, transport
5202 filters, and the commands run by the lmtp and pipe transports.
5204 5. Some older OS have a limit of 256 on the maximum number of file
5205 descriptors. Exim was using setrlimit() to set 1000 as a large value
5206 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5207 systems. I've change it so that if it can't get 1000, it tries for 256.
5209 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5210 was an oversight, and furthermore, ever since the addition of extra
5211 controls (e.g. 4.43/32), the checks on when to allow different forms of
5212 "control" were broken. There should now be diagnostics for all cases when a
5213 control that does not make sense is encountered.
5215 7. $recipients is now available in the predata ACL (oversight).
5217 8. Tidy the search cache before the fork to do a delivery from a message
5218 received from the command line. Otherwise the child will trigger a lookup
5219 failure and thereby defer the delivery if it tries to use (for example) a
5220 cached ldap connection that the parent has called unbind on.
5222 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5223 of $address_data from the recipient verification was clobbered by the
5224 sender verification.
5226 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5227 was its contents. (It was OK if the option was not defined at all.)
5229 11. A "Completed" log line is now written for messages that are removed from
5230 the spool by the -Mrm option.
5232 12. $host_address is now set to the target address during the checking of
5233 ignore_target_hosts.
5235 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5236 being passed; this would have caused $sender_host_name to have been used if
5237 matching the list had actually called for a host name (not very likely,
5238 since this list is usually IP addresses). A host name is now passed as
5241 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5242 code that specifies a non-restarting handler (typically sigaction() in
5243 modern systems) in an attempt to fix a rare and obscure crash bug.
5245 15. Narrowed the window for a race in the daemon that could cause it to ignore
5246 SIGCHLD signals. This is not a major problem, because they are used only to
5247 wake it up if nothing else does.
5249 16. A malformed maildirsize file could cause Exim to calculate negative values
5250 for the mailbox size or file count. Odd effects could occur as a result.
5251 The maildirsize information is now recalculated if the size or filecount
5254 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5255 support for a long time. Removed HAVE_SYS_VFS_H.
5257 18. Updated exipick to current release from John Jetmore.
5259 19. Allow an empty sender to be matched against a lookup in an address list.
5260 Previously the only cases considered were a regular expression, or an
5263 20. Exim went into a mad DNS lookup loop when doing a callout where the
5264 host was specified on the transport, if the DNS lookup yielded more than
5267 21. The RFC2047 encoding function was originally intended for short strings
5268 such as real names; it was not keeping to the 75-character limit for
5269 encoded words that the RFC imposes. It now respects the limit, and
5270 generates multiple encoded words if necessary. To be on the safe side, I
5271 have increased the buffer size for the ${rfc2047: expansion operator from
5274 22. Failure to deliver a bounce message always caused it to be frozen, even if
5275 there was an errors_to setting on the router. The errors_to setting is now
5278 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5279 canonical form (fully expanded) before being placed in
5280 $sender_host_address.
5282 24. Updated eximstats to version 1.33
5284 25. Include certificate and key file names in error message when GnuTLS fails
5285 to set them up, because the GnuTLS error message doesn't include the name
5286 of the failing file when there is a problem reading it.
5288 26. Expand error message when OpenSSL has problems setting up cert/key files.
5291 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5292 (this can affect the format of dates).
5294 28. exim_tidydb, when checking for the continued existence of a message for
5295 which it has found a message-specific retry record, was not finding
5296 messages that were in split spool directories. Consequently, it was
5297 deleting retry records that should have stayed in existence.
5299 29. eximstats updated to version 1.35
5300 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5301 1.35 - bugfix such that pie charts by volume are generated correctly
5303 30. The SPA authentication driver was not abandoning authentication and moving
5304 on to the next authenticator when an expansion was forced to fail,
5305 contradicting the general specification for all authenticators. Instead it
5306 was generating a temporary error. It now behaves as specified.
5308 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5309 (the order specifies the preference for clients). The order is now AES256,
5310 AES128, 3DES, ARCFOUR128.
5312 31. Small patch to Sieve code - explicitly set From: when generating an
5315 32. Exim crashed if a remote delivery caused a very long error message to be
5316 recorded - for instance if somebody sent an entire SpamAssassin report back
5317 as a large number of 550 error lines. This bug was coincidentally fixed by
5318 increasing the size of one of Exim's internal buffers (big_buffer) that
5319 happened as part of the Exiscan merge. However, to be on the safe side, I
5320 have made the code more robust (and fixed the comments that describe what
5323 33. Some experimental protocols are using DNS PTR records for new purposes. The
5324 keys for these records are domain names, not reversed IP addresses. The
5325 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5326 leaves it alone. Component reversal etc. now happens only for IP addresses.
5329 34. The host_aton() function is supposed to be passed a string that is known
5330 to be a valid IP address. However, in the case of IPv6 addresses, it was
5331 not checking this. This is a hostage to fortune. Exim now panics and dies
5332 if the condition is not met. A case was found where this could be provoked
5333 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5334 components; fortuitously, this particular loophole had already been fixed
5335 by change 4.50/55 or 4.44/33 above.
5337 If there are any other similar loopholes, the new check in host_aton()
5338 itself should stop them being exploited. The report I received stated that
5339 data on the command line could provoke the exploit when Exim was running as
5340 exim, but did not say which command line option was involved. All I could
5341 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5342 running as the user.
5345 35. There was a buffer overflow vulnerability in the SPA authentication code
5346 (which came originally from the Samba project). I have added a test to the
5347 spa_base64_to_bits() function which I hope fixes it.
5350 36. The daemon start-up calls getloadavg() while still root for those OS that
5351 need the first call to be done as root, but it missed one case: when
5352 deliver_queue_load_max is set with deliver_drop_privilege. This is
5353 necessary for the benefit of the queue runner, because there is no re-exec
5354 when deliver_drop_privilege is set.
5356 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5357 was in use, was not putting the data itself into the right store pool;
5358 consequently, it could be overwritten for a subsequent message in the same
5359 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5362 38. Sometimes the final signoff response after QUIT could fail to get
5363 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5364 < 0 before doing a fflush(). This bug looks as though it goes back to the
5365 introduction of TLS in release 3.20, but "sometimes" must have been rare
5366 because the tests only now provoked it.
5372 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5373 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5374 Now it returns an integer. A number of calls were still expecting a T/F
5375 return. Fortuitously, in all cases, the tests worked in OK situations,
5376 which is the norm. However, things would have gone wrong on any write
5377 failures on the smtp file descriptor. This function is used when sending
5378 messages over SMTP and also when doing verify callouts.
5380 2. When Exim is called to do synchronous delivery of a locally submitted
5381 message (the -odf or -odi options), it no longer closes stderr before doing
5384 3. Implemented the mua_wrapper option.
5386 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5388 5. Implemented the functions header_remove(), header_testname(),
5389 header_add_at_position(), and receive_remove_recipient(), and exported them
5392 6. If an ACL "warn" statement specified the addition of headers, Exim already
5393 inserted X-ACL-Warn: at the start if there was no header name. However, it
5394 was not making this test for the second and subsequent header lines if
5395 there were newlines in the string. This meant that an invalid header could
5396 be inserted if Exim was badly configured.
5398 7. Allow an ACL "warn" statement to add header lines at the start or after all
5399 the Received: headers, as well as at the end.
5401 8. Added the rcpt_4xx retry error code.
5403 9. Added postmaster_mailfrom=xxx to callout verification option.
5405 10. Added mailfrom=xxxx to the callout verification option, for verify=
5408 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5409 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5411 12. Inserted some casts to stop certain compilers warning when using pointer
5412 differences as field lengths or precisions in printf-type calls (mostly
5413 affecting debugging statements).
5415 13. Added optional readline() support for -be (dynamically loaded).
5417 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5418 same clock tick as a message's arrival, so that its received time was the
5419 same as the "first fail" time on the retry record, and that message
5420 remained on the queue past the ultimate address timeout, every queue runner
5421 would try a delivery (because it was past the ultimate address timeout) but
5422 after another failure, the ultimate address timeout, which should have then
5423 bounced the address, did not kick in. This was a "< instead of <=" error;
5424 in most cases the first failure would have been in the next clock tick
5425 after the received time, and all would be well.
5427 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5428 being recognized when the domain list was tested by the match_domain
5429 condition in an expansion string.
5431 16. Added the ${str2b64: operator.
5433 17. Exim was always calling setrlimit() to set a large limit for the number of
5434 processes, without checking whether the existing limit was already
5435 adequate. (It did check for the limit on file descriptors.) Furthermore,
5436 errors from getrlimit() and setrlimit() were being ignored. Now they are
5437 logged to the main and panic logs, but Exim does carry on, to try to do its
5438 job under whatever limits there are.
5440 18. Imported PCRE 5.0.
5442 19. Trivial typo in log message " temporarily refused connection" (the leading
5445 20. If the log selector return_path_on_delivery was set and an address was
5446 redirected to /dev/null, the delivery process crashed because it assumed
5447 that a return path would always be set for a "successful" delivery. In this
5448 case, the whole delivery is bypassed as an optimization, and therefore no
5451 21. Internal re-arrangement: the function for sending a challenge and reading
5452 a response while authentication was assuming a zero-terminated challenge
5453 string. It's now changed to take a pointer and a length, to allow for
5454 binary data in such strings.
5456 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5458 23. Exim was not respecting finduser_retries when seeking the login of the
5459 uid under which it was called; it was always trying 10 times. (The default
5460 setting of finduser_retries is zero.) Also, it was sleeping after the final
5461 failure, which is pointless.
5463 24. Implemented tls_on_connect_ports.
5465 25. Implemented acl_smtp_predata.
5467 26. If the domain in control=submission is set empty, Exim assumes that the
5468 authenticated id is a complete email address when it generates From: or
5469 Sender: header lines.
5471 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5472 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5473 chown and chgrp in /bin and hostname in /usr/bin.
5475 28. Exim was keeping the "process log" file open after each use, just as it
5476 does for the main log. This opens the possibility of it remaining open for
5477 long periods when the USR1 signal hits a daemon. Occasional processlog
5478 errors were reported, that could have been caused by this. Anyway, it seems
5479 much more sensible not to leave this file open at all, so that is what now
5482 29. The long-running daemon process does not normally write to the log once it
5483 has entered its main loop, and it closes the log before doing so. This is
5484 so that log files can straightforwardly be renamed and moved. However,
5485 there are a couple of unusual error situations where the daemon does write
5486 log entries, and I had neglected to close the log afterwards.
5488 30. The text of an SMTP error response that was received during a remote
5489 delivery was being truncated at 512 bytes. This is too short for some of
5490 the long messages that one sometimes sees. I've increased the limit to
5493 31. It is now possible to make retry rules that apply only when a message has a
5494 specific sender, in particular, an empty sender.
5496 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5497 it possible to be selective about when SMTP synchronization is enforced.
5499 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5501 32. Implemented hosts_connection_nolog.
5503 33. Added an ACL for QUIT.
5505 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5508 35. Added mailbox_size and mailbox_filecount to appendfile.
5510 36. Added control = no_multiline_responses to ACLs.
5512 37. There was a bug in the logic of the code that waits for the clock to tick
5513 in the case where the clock went backwards by a substantial amount such
5514 that the microsecond fraction of "now" was more than the microsecond
5515 fraction of "then" (but the whole seconds number was less).
5517 38. Added support for the libradius Radius client library this is found on
5518 FreeBSD (previously only the radiusclient library was supported).
5524 1. When certain lookups returned multiple values in the form name=value, the
5525 quoting of the values was not always being done properly. Specifically:
5526 (a) If the value started with a double quote, but contained no whitespace,
5528 (b) If the value contained whitespace other than a space character (i.e.
5529 tabs or newlines or carriage returns) it was not quoted.
5530 This fix has been applied to the mysql and pgsql lookups by writing a
5531 separate quoting function and calling it from the lookup code. The fix
5532 should probably also be applied to nisplus, ibase and oracle lookups, but
5533 since I cannot test any of those, I have not disturbed their existing code.
5535 2. A hit in the callout cache for a specific address caused a log line with no
5536 reason for rejecting RCPT. Now it says "Previous (cached) callout
5537 verification failure".
5539 3. There was an off-by-one bug in the queryprogram router. An over-long
5540 return line was truncated at 256 instead of 255 characters, thereby
5541 overflowing its buffer with the terminating zero. As well as fixing this, I
5542 have increased the buffer size to 1024 (and made a note to document this).
5544 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5545 when Exim is waiting for an SMTP response from a remote server, Exim
5546 restarts its select() call on the socket, thereby resetting its timeout.
5547 This is not a problem when such interrupts are rare. Somebody set up a cron
5548 job to run exiwhat every 2 minutes, which is less than the normal select()
5549 timeout (5 or 10 minutes). This meant that the select() timeout never
5550 kicked in because it was always reset. I have fixed this by comparing the
5551 time when an interrupt arrives with the time at the start of the first call
5552 to select(). If more time than the timeout has elapsed, the interrupt is
5553 treated as a timeout.
5555 5. Some internal re-factoring in preparation for the addition of Sieve
5556 extensions (by MH). In particular, the "personal" test is moved to a
5557 separate function, and given an option for scanning Cc: and Bcc: (which is
5558 not set for Exim filters).
5560 6. When Exim created an email address using the login of the caller as the
5561 local part (e.g. when creating a From: or Sender: header line), it was not
5562 quoting the local part when it contained special characters such as @.
5564 7. Installed new OpenBSD configuration files.
5566 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5567 try to make them clearer.
5569 9. Callout options, other than the timeout value, were being ignored when
5570 verifying sender addresses in header lines. For example, when using
5572 verify = header_sender/callout=no_cache
5574 the cache was (incorrectly) being used.
5576 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5577 only the Cygwin environment.
5579 11. When return_path_on_delivery was set as a log selector, if different remote
5580 addresses in the same message used different return paths and parallel
5581 remote delivery occurred, the wrong values would sometimes be logged.
5582 (Whenever a remote delivery process finished, the return path value from
5583 the most recently started remote delivery process was logged.)
5585 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5586 lines when AUTH and/or TLS are in use. This is the "received protocol"
5587 field. Exim used to use "asmtp" for authenticated SMTP, without any
5588 indication (in the protocol name) for TLS use. Now it follows the RFC and
5589 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5590 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5591 names appear in log lines as well as in Received: header lines.
5593 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5594 extensions, and comparison tests, and to fix some bugs.
5596 14. Changes to the "personal" filter test:
5598 (1) The test was buggy in that it was just doing the equivalent of
5599 "contains" tests on header lines. For example, if a user's address was
5600 anne@some.where, the "personal" test would incorrectly be true for
5602 To: susanne@some.where
5604 This test is now done by extracting each address from the header in turn,
5605 and checking the entire address. Other tests that are part of "personal"
5606 are now done using regular expressions (for example, to check local parts
5607 of addresses in From: header lines).
5609 (2) The list of non-personal local parts in From: addresses has been
5610 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5611 taken from the Sieve specification recommendations.
5613 (3) If the message contains any header line starting with "List-" it is
5614 treated as non-personal.
5616 (4) The test for "circular" in the Subject: header line has been removed
5617 because it now seems ill-conceived.
5619 15. Minor typos in src/EDITME comments corrected.
5621 16. Installed latest exipick from John Jetmore.
5623 17. If headers_add on a router specified a text string that was too long for
5624 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5625 of string_sprintf() is now avoided.
5627 18. $message_body_size was not set (it was always zero) when running the DATA
5628 ACL and the local_scan() function.
5630 19. For the "mail" command in an Exim filter, no default was being set for
5631 the once_repeat time, causing a random time value to be used if "once" was
5632 specified. (If the value happened to be <= 0, no repeat happened.) The
5633 default is now 0s, meaning "never repeat". The "vacation" command was OK
5634 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5635 (I found it when inspecting the code).
5637 20. There is now an overall timeout for performing a callout verification. It
5638 defaults to 4 times the callout timeout, which applies to individual SMTP
5639 commands during the callout. The overall timeout applies when there is more
5640 than one host that can be tried. The timeout is checked before trying the
5641 next host. This prevents very long delays if there are a large number of
5642 hosts and all are timing out (e.g. when the network connections are timing
5643 out). The value of the overall timeout can be changed by specifying an
5644 additional sub-option for "callout", called "maxwait". For example:
5646 verify = sender/callout=5s,maxwait=20s
5648 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5649 to the end before writing, but this should make it even safer).
5651 22. Exim was forgetting that it had advertised PIPELINING for the second and
5652 subsequent messages on an SMTP connection. It was also not resetting its
5653 memory on STARTTLS and an internal HELO.
5655 23. When Exim logs an SMTP synchronization error within a session, it now
5656 records whether PIPELINING has been advertised or not.
5658 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5659 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5660 rather than long int.
5662 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5664 26. Added the never_mail option to autoreply.
5670 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5671 crash if the getsockname() call failed; this can happen if a connection is
5672 closed very soon after it is established. The problem was simply in the
5673 order in which certain operations were done, causing Exim to try to write
5674 to the SMTP stream before it had set up the file descriptor. The bug has
5675 been fixed by making things happen in the correct order.
5681 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5682 before the connection was closed, thus losing the rejection response.
5684 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5685 some early Solaris releases, but causes trouble in current releases where
5686 socklen_t is defined.
5688 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5691 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5694 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5695 that releasing the top of it at the end releases what was used for sub-
5696 expansions (unless the block got too big). However, discard this block if
5697 the first thing is a variable or header, so that we can use its block when
5698 it is dynamic (useful for very large $message_headers, for example).
5700 6. Lookups now cache *every* query, not just the most recent. A new, separate
5701 store pool is used for this. It can be recovered when all lookup caches are
5702 flushed. Lookups now release memory at the end of their result strings.
5703 This has involved some general refactoring of the lookup sources.
5705 7. Some code has been added to the store_xxx() functions to reduce the amount
5706 of flapping under certain conditions.
5708 8. log_incoming_interface used to affect only the <= reception log lines. Now
5709 it causes the local interface and port to be added to several more SMTP log
5710 lines, for example "SMTP connection from", and rejection lines.
5712 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5714 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5716 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5717 could be overwritten at the end of the current message (or the start of a
5718 new message if it was set in a HELO ACL). The value is now preserved for
5719 the duration of the SMTP connection.
5721 12. If a transport had a headers_rewrite setting, and a matching header line
5722 contained an unqualified address, that address was qualified, even if it
5723 did not match any rewriting rules. The underlying bug was that the values
5724 of the flags that permit the existence of unqualified sender and recipient
5725 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5726 non-local messages, and by -bnq for local messages) were not being
5727 preserved with the message after it was received.
5729 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5730 "next input=" as part of the text comprising the host identity instead of
5731 the correct text. The code was using the same buffer for two different
5732 strings. However, depending on which order the printing function evaluated
5733 its arguments, the bug did not always show up. Under Linux, for example, my
5734 test suite worked just fine.
5736 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5737 doesn't work with some older versions of Perl. It has been changed to "my",
5738 which in any case is probably the better facility to use.
5740 15. A really picky compiler found some instances of statements for creating
5741 error messages that either had too many or two few arguments for the format
5744 16. The size of the buffer for calls to the DNS resolver has been increased
5745 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5746 for addresses that have a lot of PTR records. This alleviates a problem; it
5747 does not fully solve it.
5749 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5750 buffer now truncates the list and logs the incident, which is the same
5751 action as happens when Exim is looking up a host name and its aliases.
5752 Previously in this situation something unpredictable would happen;
5753 sometimes it was "internal error: store_reset failed".
5755 18. If a server dropped the connection unexpectedly when an Exim client was
5756 using GnuTLS and trying to read a response, the client delivery process
5757 crashed while trying to generate an error log message.
5759 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5760 string, for example:
5762 warn message = H1: something\nH2: something
5764 the text was added as a single header line from Exim's point of view
5765 though it ended up OK in the delivered message. However, searching for the
5766 second and subsequent header lines using $h_h2: did not work. This has been
5767 fixed. Similarly, if a system filter added multiple headers in this way,
5768 the routers could not see them.
5770 20. Expanded the error message when iplsearch is called with an invalid key to
5771 suggest using net-iplsearch in a host list.
5773 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5774 ACLs are no longer actually imposed (and a message to that effect is
5777 22. If a "gecos" field in a passwd entry contained escaped characters, in
5778 particular, if it contained a \" sequence, Exim got it wrong when building
5779 a From: or a Sender: header from that name. A second bug also caused
5780 incorrect handling when an unquoted " was present following a character
5781 that needed quoting.
5783 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5784 was not being matched caselessly.
5786 24. Arranged for all hyphens in the exim.8 source to be escaped with
5789 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5790 properly. Recipient callout cache records were still being keyed to include
5791 the sender, even when use_sender was set false. This led to far more
5792 callouts that were necessary. The sender is no longer included in the key
5793 when use_sender is false.
5795 26. Added "control = submission" modifier to ACLs.
5797 27. Added the ${base62d: operator to decode base 62 numbers.
5799 28. dnsdb lookups can now access SRV records.
5801 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5802 the configuration file.
5804 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5805 (-v) mode. This makes the output for a verbose queue run more intelligible.
5807 31. Added a use_postmaster feature to recipient callouts.
5809 32. Added the $body_zerocount variable, containing the number of binary zero
5810 bytes in the message body.
5812 33. The time of last modification of the "new" subdirectory is now used as the
5813 "mailbox time last read" when there is a quota error for a maildir
5816 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5818 35. Added +ignore_unknown as a special item in host lists.
5820 36. Code for decoding IPv6 addresses in host lists is now included, even if
5821 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5822 address was recognized as an IP address, but was then not correctly decoded
5823 into binary, causing unexpected and incorrect effects when compared with
5830 1. Very minor rewording of debugging text in manualroute to say "list of
5831 hosts" instead of "hostlist".
5833 2. If verify=header_syntax was set, and a header line with an unqualified
5834 address (no domain) and a large number of spaces between the end of the
5835 name and the colon was received, the reception process suffered a buffer
5836 overflow, and (when I tested it) crashed. This was caused by some obsolete
5837 code that should have been removed. The fix is to remove it!
5839 3. When running in the test harness, delay a bit after writing a bounce
5840 message to get a bit more predictability in the log output.
5842 4. Added a call to search_tidyup() just before forking a reception process. In
5843 theory, someone could use a lookup in the expansion of smtp_accept_max_
5844 per_host which, without the tidyup, could leave open a database connection.
5846 5. Added the variables $recipient_data and $sender_data which get set from a
5847 lookup success in an ACL "recipients" or "senders" condition, or a router
5848 "senders" option, similar to $domain_data and $local_part_data.
5850 6. Moved the writing of debug_print from before to after the "senders" test
5853 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5854 problems for message scanning, either using a data ACL, or using
5855 local_scan() because the Received: header was not generated till after they
5856 were called (in order to set the time as the time of reception completion).
5857 I have revised the way this works. The header is now generated after the
5858 body is received, but before the ACL or local_scan() are called. After they
5859 are run, the timestamp in the header is updated.
5865 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5866 before starting a queue runner without re-exec. This happened only when
5867 deliver_drop_privilege was set or when the Exim user was set to root. The
5868 effect of the bug was that timeouts during subsequent deliveries caused
5869 crashes instead of being properly handled. The handler is now left at its
5870 default (and expected) setting.
5872 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5873 message, again when deliver_drop_privilege is set or Exim is run as root.
5874 The bug described in (1) was not present in this case, but the tidying up
5875 of the other signals was missing. I have made the two cases consistent.
5877 3. The ignore_target_hosts setting on a manualroute router was being ignored
5878 for hosts that were looked up using the /MX notation.
5880 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5883 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5884 operated on the sender address. After changing the $sender_address to <>
5885 for the sender address verify, Exim was re-instated it as the original
5886 (before rewriting) address, but remembering that it had rewritten it, so it
5887 wasn't rewriting it again. This bug also had the effect of breaking the
5888 sender address verification caching when the sender address was rewritten.
5890 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5891 This has been changed so that if the ip literal address matches
5892 ignore_target_hosts, the router declines.
5894 7. Added expansion conditions match_domain, match_address, and match_local_
5895 part (NOT match_host).
5897 8. The placeholder for the Received: header didn't have a length field set.
5899 9. Added code to Exim itself and to exim_lock to test for a specific race
5900 condition that could lead to file corruption when using MBX delivery. The
5901 issue is with the lockfile that is created in /tmp. If this file is removed
5902 after a process has opened it but before that process has acquired a lock,
5903 there is the potential for a second process to recreate the file and also
5904 acquire a lock. This could lead to two Exim processes writing to the file
5905 at the same time. The added code performs the same test as UW imapd; it
5906 checks after acquiring the lock that its file descriptor still refers to
5907 the same named file.
5909 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5910 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5913 11. Added the smtp_active_hostname option. If used, this will typically be made
5914 to depend on the incoming interface address. Because $interface_address is
5915 not set up until the daemon has forked a reception process, error responses
5916 that can happen earlier (such as "too many connections") no longer contain
5919 12. If an expansion in a condition on a "warn" statement fails because a lookup
5920 defers, the "warn" statement is abandoned, and the next ACL statement is
5921 processed. Previously this caused the whole ACL to be aborted.
5923 13. Added the iplsearch lookup type.
5925 14. Added ident_timeout as a log selector.
5927 15. Added tls_certificate_verified as a log selector.
5929 16. Added a global option tls_require_ciphers (compare the smtp transport
5930 option of the same name). This controls incoming TLS connections.
5932 17. I finally figured out how to make tls_require_ciphers do a similar thing
5933 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5934 before starting the TLS session.
5936 18. Tabs are now shown as \t in -bP output.
5938 19. If the log selector return_path_on_delivery was set, Exim crashed when
5939 bouncing a message because it had too many Received: header lines.
5941 20. If two routers both had headers_remove settings, and the first one included
5942 a superfluous trailing colon, the final name in the first list and the
5943 first name in the second list were incorrectly joined into one item (with a
5944 colon in the middle).
5950 1. Added -C and -D options to the exinext utility, mainly to make it easier
5951 to include in the automated testing, but these could be helpful when
5952 multiple configurations are in use.
5954 2. The exinext utility was not formatting the output nicely when there was
5955 an alternate port involved in the retry record key, nor when there was a
5956 message id as well (for retries that were specific to a specific message
5957 and a specific host). It was also confused by IPv6 addresses, because of
5958 the additional colons they contain. I have fixed the IPv4 problem, and
5959 patched it up to do a reasonable job for IPv6.
5961 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5962 delivery, the log line now contains "pipelined" if PIPELINING was used.
5964 4. An SMTP transport process used to panic and die if the bind() call to set
5965 an explicit outgoing interface failed. This has been changed; it is now
5966 treated in the same way as a connect() failure.
5968 5. A reference to $sender_host_name in the part of a conditional expansion
5969 that was being skipped was still causing a DNS lookup. This no longer
5972 6. The def: expansion condition was not recognizing references to header lines
5973 that used bh_ and bheader_.
5975 7. Added the _cache feature to named lists.
5977 8. The code for checking quota_filecount in the appendfile transport was
5978 allowing one more file than it should have been.
5980 9. For compatibility with Sendmail, the command line option
5988 and sets the incoming protocol and host name (for trusted callers). The
5989 host name and its colon can be omitted when only the protocol is to be set.
5990 Note the Exim already has two private options, -pd and -ps, that refer to
5991 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5992 "s", but I don't think that's a major issue.
5994 10. A number of refactoring changes to the code, none of which should affect
5997 (a) The number of logging options was getting close to filling up the
5998 32-bit word that was used as a bit map. I have split them into two classes:
5999 those that are passed in the argument to log_write(), and those that are
6000 only ever tested independently outside of that function. These are now in
6001 separate 32-bit words, so there is plenty of room for expansion again.
6002 There is no change in the user interface or the logging behaviour.
6004 (b) When building, for example, log lines, the code previously used a
6005 macro that called string_cat() twice, in order to add two strings. This is
6006 not really sufficiently general. Furthermore, there was one instance where
6007 it was actually wrong because one of the argument was used twice, and in
6008 one call a function was used. (As it happened, calling the function twice
6009 did not affect the overall behaviour.) The macro has been replaced by a
6010 function that can join an arbitrary number of extra strings onto a growing
6013 (c) The code for expansion conditions now uses a table and a binary chop
6014 instead of a serial search (which was left over from when there were very
6015 few conditions). Also, it now recognizes conditions like "pam" even when
6016 the relevant support is not compiled in: a suitably worded error message is
6017 given if an attempt is made to use such a condition.
6019 11. Added ${time_interval:xxxxx}.
6021 12. A bug was causing one of the ddress fields not to be passed back correctly
6022 from remote delivery subprocesses. The field in question was not being
6023 subsequently used, so this caused to problems in practice.
6025 13. Added new log selectors queue_time and deliver_time.
6027 14. Might have fixed a bug in maildirsizefile handling that threw up
6028 "unexpected character" debug warnings, and recalculated the data
6029 unnecessarily. In any case, I expanded the warning message to give more
6032 15. Added the message "Restricted characters in address" to the statements in
6033 the default ACL that block characters like @ and % in local parts.
6035 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6036 Three changes have been made:
6038 (a) There was a serious bug; a negative response to MAIL caused the whole
6039 recipient domain to be cached as invalid, thereby blocking all messages
6040 to all local parts at the same domain, from all senders. This bug has
6041 been fixed. The domain is no longer cached after a negative response to
6042 MAIL if the sender used is not empty.
6044 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6047 (c) A new callout option, "use_sender" has been added for people who want
6048 the modified behaviour.
6054 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6057 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6058 indeed breaks things for older releases.
6060 3. Added additional logging to the case where there is a problem reading data
6061 from a filter that is running in a subprocess using a pipe, in order to
6062 try to track down a specific problem.
6064 4. Testing facility fudge: when running in the test harness and attempting
6065 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6066 getting "No route to host". Convert this to a timeout.
6068 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6071 6. Some OS don't have socklen_t but use size_t instead. This affects the
6072 fifth argument of getsockopt() amongst other things. This is now
6073 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6074 can be set for individual OS. I have set it for SunOS5, OSF1, and
6075 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6076 some earlier ones do not.
6078 7. Change 4.30/15 was not doing the test caselessly.
6080 8. The standard form for an IPv6 address literal was being rejected by address
6081 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6082 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6083 this, as well as the form without the "IPv6" on the front (but only when
6084 address literals are enabled, of course).
6086 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6088 10. Exim crashed if a message with an empty sender address specified by -f
6089 encountered a router with an errors_to setting. This could be provoked only
6090 by a command such as
6094 where an empty string was supplied; "<>" did not hit this bug.
6096 11. Installed PCRE release 4.5.
6098 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6099 remained set. It is now erased.
6101 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6102 times from message ids (which are base 36 rather than the normal 62).
6104 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6105 were being counted as actual protocol errors, and logged if the log
6106 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6107 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6108 and DATA following a set of rejected RCPTs do not count as protocol errors.
6109 In other words, Exim assumes they were pipelined, though this may not
6110 actually be the case. Of course, in all cases the client gets an
6111 appropriate error code.
6113 15. If a lookup fails in an ACL condition, a message about the failure may
6114 be available; it is used if testing the ACL cannot continue, because most
6115 such messages specify what the cause of the deferral is. However, some
6116 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6117 that caused an old message to be retained and used if a later statement
6118 caused a defer, replacing the real cause of the deferral.
6120 16. If an IP address had so many PTR records that the DNS lookup buffer
6121 was not large enough to hold them, Exim could crash while trying to process
6122 the truncated data. It now detects and logs this case.
6124 17. Further to 4.21/58, another change has been made: if (and only if) the
6125 first line of a message (the first header line) ends with CRLF, a bare LF
6126 in a subsequent header line has a space inserted after it, so as not to
6127 terminate the header.
6129 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6130 unnecessarily, used atoi() instead of strtol(), and didn't check the
6131 termination when getting file sizes from file names by regex.
6133 19. Completely re-implemented the support for maildirsize files, in the light
6134 of a number of problems with the previous contributed implementation
6135 (4.30/29). In particular:
6137 . If the quota is zero, the maildirsize file is maintained, but no quota is
6140 . If the maildir directory does not exist, it is created before any attempt
6141 to write a maildirsize file.
6143 . The quota value in the file is just a cache; if the quota is changed in
6144 the transport, the new value overrides.
6146 . A regular expression is available for excluding directories from the
6149 20. The autoreply transport checks the characters in options that define the
6150 message's headers; it allows continued headers, but it was checking with
6151 isspace() after an embedded newline instead of explicitly looking for a
6154 21. If all the "regular" hosts to which an address was routed had passed their
6155 expiry times, and had not reached their retry times, the address was
6156 bounced, even if fallback hosts were defined. Now Exim should go on to try
6159 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6160 equivalent code in the SMTP transport. Some hosts send humungous responses
6161 to HELO/EHLO, more than 1024 it seems.
6163 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6164 gives compiler warnings in some environments. I've now done it "properly",
6167 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6168 (because of problems with the built-in one) was declared to return uschar *
6169 instead of char *, causing compiler failure.
6171 25. Fixed a file descriptor leak when processing alias/forward files.
6173 26. Fixed a minor format string issue in dbfn.c.
6175 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6177 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6178 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6181 29. When a sender address is verified, it is cached, to save repeating the test
6182 when there is more than one recipient in a message. However, when the
6183 verification involves a callout, it is possible for different callout
6184 options to be set for different recipients. It is too complicated to keep
6185 track of this in the cache, so now Exim always runs a verification when a
6186 callout is required, relying on the callout cache for the optimization.
6187 The overhead is duplication of the address routing, but this should not be
6190 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6191 to be verified with callout=postmaster, and the main callout worked but the
6192 postmaster check failed, the verification correctly failed. However, if a
6193 subsequent RCPT command asked for sender verification *without* the
6194 postmaster check, incorrect caching caused this verification also to fail,
6197 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6198 it was not caching the DNS options (qualify_single, search_parents) that
6199 were used when the lookup failed. A subsequent lookup with different
6200 options therefore always gave the same answer, though there were cases
6201 where it should not have. (Example: a "domains = !$mx_any" option on a
6202 dnslookup router: the "domains" option is always processed without any
6203 widening, but the router might have qualify_single set.) Now Exim uses the
6204 cached value only when the same options are set.
6206 32. Added John Jetmore's "exipick" utility to the distribution.
6208 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6209 than a timeout (e.g. a certificate is required, and is not provided), an
6210 Exim server now closes the connection immediately. Previously it waited for
6211 the client to close - but if the client is SSL, it seems that they each
6212 wait for each other, leading to a delay before one of them times out.
6214 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6215 maintained 0.8.x compatibility because I don't think many are using it, and
6216 it is clearly obsolete.
6218 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6221 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6222 client certificate was expired. A simple patch fixes this, though I don't
6223 understand the full logic of why the verify callback is called multiple
6226 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6227 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6228 which causes problems with some clients (such as the Certicom SSL Plus
6229 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6230 disables the coutermeasure allowing Eudora to connect."
6232 38. Exim was not checking that a write() to a log file succeeded. This could
6233 lead to Bad Things if a log got too big, in particular if it hit a file
6234 size limit. Exim now panics and dies if it cannot write to a log file, just
6235 as it does if it cannot open a log file.
6237 39. Modified OS/Makefile-Linux so that it now contains
6239 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6241 The two -D definitions ensure that Exim is compiled with large file
6242 support, which makes it possible to handle log files that are bigger than
6245 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6246 instance) a domain was checked against a named list that involved a lookup,
6247 causing $domain_data to be set, then another domain was checked against the
6248 same list, then the first domain was re-checked, the value of $domain_data
6249 after the final check could be wrong. In particular, if the second check
6250 failed, it could be set empty. This bug probably also applied to
6253 41. The strip_trailing_dot option was not being applied to the address given
6254 with the -f command-line option.
6256 42. The code for reading a message's header from the spool was incrementing
6257 $received_count, but never initializing it. This meant that the value was
6258 incorrect (doubled) while delivering a message in the same process in which
6259 it was received. In the most common configuration of Exim, this never
6260 happens - a fresh exec is done - but it can happen when
6261 deliver_drop_privilege is set.
6263 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6264 it now includes up to 150 characters of the unexpected data in the log
6267 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6268 and building data strings. The size of both of these buffers was 10 000
6269 bytes - far larger than anybody would *ever* want, thought I. Needless to
6270 say, somebody hit the limit. I have increased the maximum line length to
6271 20 000 and the maximum data length of concatenated lines to 100 000. I have
6272 also fixed two bugs, because there was no checking on these buffers. Tsk,
6273 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6274 buffer is too small.
6276 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6277 lsearch lookups. Now it does.
6279 46. When parsing a route_list item in a manualroute router, a fixed-length
6280 buffer was used for the list of hosts. I made this 1024 bytes long,
6281 thinking that nobody would ever have a list of hosts that long. Wrong.
6282 Somebody had a whole pile of complicated expansion conditions, and the
6283 string was silently truncated, leading to an expansion error. It turns out
6284 that it is easier to change to an unlimited length (owing to other changes
6285 that have happened since this code was originally written) than to build
6286 structure for giving a limitation error. The length of the item that
6287 expands into the list of hosts is now unlimited.
6289 47. The lsearch lookup could not handle data where the length of text line was
6290 more than 4095 characters. Such lines were truncated, leading to shortened
6291 data being returned. It should now handle lines of any length.
6293 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6294 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6297 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6298 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6299 no longer happens in comment lines. A list of replacements is now placed
6300 at the head of all of the source files, except those whose only change is
6301 to replace PERL_COMMAND in the very first #! line.
6303 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6304 messages on the queue, with a bottom-up merge sort, using code contributed
6305 by Michael Haardt. This should make operations like -bp somewhat faster on
6306 large queues. It won't affect queue runners, except when queue_run_in_order
6309 51. Installed eximstats 1.31 in the distribution.
6311 52. Added support for SRV lookups to the dnslookup router.
6313 53. If an ACL referred to $message_body or $message_body_end, the value was not
6314 reset for any messages that followed in the same SMTP session.
6316 54. The store-handling optimization for building very long strings was not
6317 differentiating between the different store pools. I don't think this
6318 actually made any difference in practice, but I've tidied it.
6320 55. While running the routers to verify a sender address, $sender_address
6321 was still set to the sender address. This is wrong, because when routing to
6322 send a bounce to the sender, it would be empty. Therefore, I have changed
6323 it so that, while verifying a sender address, $sender_address is set to <>.
6324 (There is no change to what happens when verifying a recipient address.)
6326 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6327 target A or AAAA records (if not already returned) without resetting the
6328 qualify_single or search_parents options of the DNS resolver. These are
6329 inappropriate in this case because the targets of MX and SRV records must
6330 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6331 target that, when qualified, matched something in the local domain. These
6332 two options are now turned off when doing these lookups.
6334 57. It seems that at least some releases of Reiserfs (which does not have the
6335 concept of a fixed number of inodes) returns zero and not -1 for the
6336 number of available inodes. This interacted badly with check_spool_inodes,
6337 which assumed that -1 was the "no such thing" setting. What I have done is
6338 to check that the total number of inodes is greater than zero before doing
6339 the test of how many are available.
6341 58. When a "warn" ACL statement has a log_message modifier, the message is
6342 remembered, and not repeated. This is to avoid a lot of repetition when a
6343 message has many recipients that cause the same warning to be written.
6344 However, Exim was preserving the list of already written lines for an
6345 entire SMTP session, which doesn't seem right. The memory is now reset if a
6346 new message is started.
6348 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6349 debugging output unless log_rewrite was also set.
6351 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6352 of (int)(handle) when we know that handle contains (void *)(-1).
6354 61. The Exim daemon panic-logs an error return when it closes the incoming
6355 connection. However "connection reset by peer" seems to be common, and
6356 isn't really an error worthy of noting specially, so that particular error
6359 62. When Exim is trying to find all the local interfaces, it used to panic and
6360 die if the ioctl to get the interface flags failed. However, it seems that
6361 on at least one OS (Solaris 9) it is possible to have an interface that is
6362 included in the list of interfaces, but for which you get a failure error
6363 for this call. This happens when the interface is not "plumbed" into a
6364 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6365 failure of the "get flags" call assumes that the interface is down.
6367 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6368 makes life easier for people who are doing arithmetic on fields extracted
6369 from dates, where you often get leading zeros that should not be
6370 interpreted as octal.
6372 64. Added qualify_domain to the redirect router, to override the global
6375 65. If a pathologically long header line contained very many addresses (the
6376 report of this problem mentioned 10 000) and each of them was rewritten,
6377 Exim could use up a very large amount of memory. (It kept on making new
6378 copies of the header line as it rewrote, and never released the old ones.)
6379 At the expense of a bit more processing, the header rewriting function has
6380 been changed so that it no longer eats memory in this way.
6382 66. The generation of the Received: header has been moved from the time that a
6383 message starts to be received, to the time that it finishes. The timestamp
6384 in the Received: header should now be very close to that of the <= log
6385 line. There are two side-effects of this change:
6387 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6388 logged header lines no longer include the local Received: line, because
6389 it has not yet been created. The same applies to a copy of the message
6390 that is returned to a non-SMTP sender when a message is rejected.
6392 (b) When a filter file is tested using -bf, no additional Received: header
6393 is added to the test message. After some thought, I decided that this
6396 This change does not affect the value of $received_for. It is still set
6397 after address rewriting, but before local_scan() is called.
6399 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6401 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6402 gave an unhelpful panic error message, and a defer error. I have managed to
6403 change this behaviour so that it now rejects any supplied certificate,
6404 which seems right, as the list of acceptable certificates is empty.
6406 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6407 gave an unhelpful defer error. I have not managed to make this reject any
6408 supplied certificates, but the error message it gives is "no certificate
6409 supplied", which is not helpful.
6411 70. exigrep's output now also includes lines that are not associated with any
6412 message, but which match the given pattern. Implemented by a patch from
6413 Martin Sluka, which also tidied up the Perl a bit.
6415 71. Recipient callout verification, like sender verification, was using <> in
6416 the MAIL FROM command. This isn't really the right thing, since the actual
6417 sender may affect whether the remote host accepts the recipient or not. I
6418 have changed it to use the actual sender in the callout; this means that
6419 the cache record is now keyed on a recipient/sender pair, not just the
6420 recipient address. There doesn't seem to be a real danger of callout loops,
6421 since a callout by the remote host to check the sender would use <>.
6422 [SEE ABOVE: changed after hitting problems.]
6424 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6425 temporary errors. However, in the case of such a code being given after
6426 the end of a data transmission (i.e. after ".") Exim was failing to write
6427 a retry record for the message. (Yes, there was some broken host that was
6428 actually sending 8xx at this point.)
6430 73. An unknown lookup type in a host list could cause Exim to panic-die when
6431 the list was checked. (An example that provoked this was putting <; in the
6432 middle of a list instead of at the start.) If this happened during a DATA
6433 ACL check, a -D file could be left lying around. This kind of configuration
6434 error no longer causes Exim to die; instead it causes a defer error. The
6435 incident is still logged to the main and panic logs.
6437 74. Buglet left over from Exim 3 conversion. The message "too many messages
6438 in one connection" was written to the rejectlog but not the mainlog, except
6439 when address rewriting (yes!) was being logged.
6441 75. Added write_rejectlog option.
6443 76. When a system filter was run not as root (that is, when system_filter_user
6444 was set), the values of the $n variables were not being returned to the
6445 main process; thus, they were not subsequently available in the $sn
6448 77. Added +return_path_on_delivery log selector.
6450 78. A connection timeout was being treated differently from recipients deferred
6451 when testing hosts_max_try with a message that was older than the host's
6452 retry timeout. (The host should not be counted, thus allowing all hosts to
6453 be tried at least once before bouncing.) This may have been the cause of an
6454 occasionally reported bug whereby a message would remain on the queue
6455 longer than the retry timeout, but would be bounced if a delivery was
6456 forced. I say "may" because I never totally pinned down the problem;
6457 setting up timeout/retry tests is difficult. See also the next item.
6459 79. The ultimate address timeout was not being applied to errors that involved
6460 a combination of host plus message (for example, a timeout on a MAIL
6461 command). When an address resolved to a number of possible hosts, and they
6462 were not all tried for each delivery (e.g. because of hosts_max_try), a
6463 message could remain on the queue longer than the retry timeout.
6465 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6468 81. Fixed an obscure SMTP outgoing bug which required at least the following
6469 conditions: (a) there was another message waiting for the same server;
6470 (b) the server returned 5xx to all RCPT commands in the first message so
6471 that the message was not completed; (c) the server dropped the connection
6472 or gave a negative response to the RSET that Exim sends to abort the
6473 transaction. The observed case was a dropped connection after DATA that had
6474 been sent in pipelining mode. That is, the server had advertised PIPELINING
6475 but was not implementing it correctly. The effect of the bug was incorrect
6476 behaviour, such as trying another host, and this could lead to a crash.
6482 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6483 and daemon.c were passed as pointers to ints; they should have been
6484 pointers to socklen_t variables (which are typically unsigned ints).
6486 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6489 3. Fixed a really odd bug that affected only the testing scheme; patching a
6490 certain fixed string in the binary changed the value of another string that
6491 happened to be identical to the end of the original first string.
6493 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6494 name", it returns that address as the IP address. On some operating
6495 systems (e.g. Solaris), it also passes back the IP address string as the
6496 "host name". However, on others (e.g. Linux), it passes back an empty
6497 string. Exim wasn't checking for this, and was changing the host name to an
6498 empty string, assuming it had been canonicalized.
6500 5. Although rare, it is permitted to have more than one PTR record for a given
6501 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6502 all the names associated with an address, because they do in Solaris.
6503 However, it seems that they do not in Linux for data that comes from the
6504 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6505 I found this out when I moved to a new Linux workstation and tried to run
6506 the Exim test suite.
6508 To get round this problem I have changed the code so that it now does its
6509 own call to the DNS to look up PTR records when searching for a host name.
6510 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6511 addresses that are only in /etc/hosts are still found.
6513 This behaviour is, however, controlled by an option called host_lookup_
6514 order, which defaults to "bydns:byaddr". If people want to use the other
6515 order, or indeed, just use one or the other means of lookup, they can
6516 specify it in this variable.
6518 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6519 some operating systems, this comes back from gethostbyaddr() as an empty
6520 string, and this is what Exim used to test for. However, it seems that in
6521 other systems, "." is yielded. Exim now tests for this case too.
6523 7. The values of check_spool_space and check_log_space are now held internally
6524 as a number of kilobytes instead of an absolute number of bytes. If a
6525 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6526 kilobyte. This means that much larger values can be stored.
6528 8. Exim monitor: an attempt to get the action menu when not actually pointing
6529 at a message produces an empty menu entitled "No message selected". This
6530 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6531 no entries in it ("Shell widget menu has zero width and/or height"). So I
6532 have added a single, blank menu entry in this case.
6534 9. Added ${quote_local_part.
6536 10. MIME decoding is now applied to the contents of Subject: header lines when
6539 11. Now that a reference to $sender_host_address automatically causes a reverse
6540 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6541 host lookup before query-style lookups in lists that might use this
6542 variable. This has therefore been abolished, and the "net-" prefix is no
6543 longer necessary for query-style lookups.
6545 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6546 have been a typo for LFLAGS, so it has been changed.
6548 13. The install script calls Exim with "-C /dev/null" in order to find the
6549 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6550 to be output. However, since Exim outputs its version number before the
6551 error, it didn't break the script. It just looked ugly. I fixed this by
6552 always allowing "-C /dev/null" if the caller is root.
6554 14. Ignore overlarge ACL variable number when reading spool file - insurance
6555 against a later release with more variables having written the file.
6557 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6558 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6559 this, as well as the form without the "IPv6" on the front.
6561 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6562 OS/Makefile-Darwin file.
6564 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6565 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6567 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6568 variable. However, some OS use ints for inodes. I've added cast to long int
6569 to get rid of the compiler warning.
6571 19. I had forgotten to lock out "/../" in configuration file names when
6572 ALT_CONFIG_PREFIX was set.
6574 20. Routers used for verification do not need to specify transports. However,
6575 if such a router generated a host list, and callout was configured, Exim
6576 crashed, because it could not find a port number from the (non-existent)
6577 transport. It now assumes port 25 in this circumstance.
6579 21. Added the -t option to exigrep.
6581 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6582 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6583 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6584 them is set, LOOKUP_LSEARCH is forced.
6586 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6588 24. Added sender and host information to the "rejected by local_scan()" log
6589 line; previously there was no indication of these.
6591 25. Added .include_if_exists.
6593 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6594 Linux. It turns out that not all file systems support this. Apparently some
6595 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6596 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6597 not supported on the file descriptor, is now ignored when Exim is trying to
6598 sync a directory. This applies only to Linux.
6600 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6602 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6603 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6606 29. Added support for maildirsize files from supplied patch (modified a bit).
6608 30. The use of :fail: followed by an empty string could lead Exim to respond to
6609 sender verification failures with (e.g.):
6611 550 Verification failed for <xxx>
6612 550 Sender verify failed
6614 where the first response line was missing the '-' that indicates it is not
6615 the final line of the response.
6617 31. The loop for finding the name of the user that called Exim had a hardwired
6618 limit of 10; it now uses the value of finduser_retries, which is used for
6619 all other user lookups.
6621 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6624 33. Exim was neglecting to zero errno before one call of strtol() when
6625 expanding a string and expecting an integer value. On some systems this
6626 resulted in spurious "integer overflow" errors. Also, it was casting the
6627 result into an int without checking.
6629 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6630 did not work. The code looks as if it has *never* worked, though it appears
6631 to have been documented since at least release 1.62. I have made it work.
6633 35. The "timeout_DNS" error in retry rules, also documented since at least
6634 1.62, also never worked. As it isn't clear exactly what this means, and
6635 clearly it isn't a major issue, I have abolished the feature by treating it
6636 as "timeout", and writing a warning to the main and panic logs.
6638 36. The display of retry rules for -brt wasn't always showing the error code
6641 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6642 timeout_connect_A, timeout_connect_MX.
6644 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6645 to the empty sender.
6647 39. The daemon was not analysing the content of -oX till after it had closed
6648 stderr and disconnected from the controlling terminal. This meant that any
6649 syntax errors were only noted on the panic log, and the return code from
6650 the command was 0. By re-arranging the code a little, I've made the
6651 decoding happen first, so such errors now appear on stderr, and the return
6652 code is 1. However, the actual setting up of the sockets still happens in
6653 the disconnected process, so errors there are still only recorded on the
6656 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6657 connections (as happens on some IP stacks) was logged at start up time as
6658 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6659 it from "IPv6 and IPv4", which means that two separate sockets are being
6662 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6663 says whether AF_INET or AF_INET6 was passed as an argument.
6665 42. Exiwhat output was messed up when time zones were included in log
6668 43. Exiwhat now gives more information about the daemon's listening ports,
6669 and whether -tls-on-connect was used.
6671 44. The "port" option of the smtp transport is now expanded.
6673 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6674 silently ignored. Now an error message is written to the main and panic
6677 46. There's a new ACL modifier called "logwrite" which writes to a log file
6678 as soon as it is encountered.
6680 47. Added $local_user_uid and $local_user_gid at routing time.
6682 48. Exim crashed when trying to verify a sender address that was being
6685 49. Exim was recognizing only a space character after ".include". It now also
6686 recognizes a tab character.
6688 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6689 extracting the relevant information from the specification. The man page no
6690 longer contains scrambled data for the -d option, and I've added a section
6691 at the front about calling Exim under different names.
6693 51. Added "extra_headers" argument to the "mail" command in filter files.
6695 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6698 53. Installed eximstats 1.29.
6700 54. Added transport_filter_timeout as a generic transport option.
6702 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6703 Cc: header lines. This was required by RFC 822, but it not required by RFC
6706 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6707 incoming messages that did not have them. Now it does so only if the
6708 message originates locally, that is, if there is no associated remote host
6709 address. When Resent- header lines are present, this applies to the Resent-
6710 lines rather than the non-Resent- lines.
6712 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6713 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6715 58. Messages for configuration errors now include the name of the main
6716 configuration file - useful now that there may be more than one file in a
6717 list (.included file names were always shown).
6719 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6720 for those rare installations that do not start the daemon as root or run it
6721 setuid root. I've cut out the call to initgroups() if the daemon is not
6724 60. The Exim user and group can now be bound into the binary as text strings
6725 that are looked up at the start of Exim's processing.
6727 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6729 62. Added $mailstore_basename variable.
6731 63. Installed patch to sieve.c from Michael Haardt.
6733 64. When Exim failed to open the panic log after failing to open the main log,
6734 the original message it was trying to log was written to stderr and debug
6735 output, but if they were not available (the usual case in production), it
6736 was lost. Now it is written to syslog before the two lines that record the
6737 failures to open the logs.
6739 65. Users' Exim filters run in subprocesses under the user's uid. It is
6740 possible for a "deliver" command or an alias in a "personal" command to
6741 provoke an address rewrite. If logging of address rewriting is configured,
6742 this fails because the process is not running as root or exim. There may be
6743 a better way of dealing with this, but for the moment (because 4.30 needs
6744 to be released), I have disabled address rewrite logging when running a
6745 filter in a non-root, non-exim process.
6751 1. The buildconfig auxiliary program wasn't quoting the value set for
6752 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6753 not defined. This bug was masked in 4.22 by the effect that was fixed in
6756 2. Some messages that were rejected after a message id was allocated were
6757 shown as "incomplete" by exigrep. It no longer does this for messages that
6758 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6760 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6761 have allow_domain_literals set, the ID did not get logged in the <= line.
6762 Domain literals are now always recognized in Message-ID: header lines.
6764 4. The first argument for a ${extract expansion item is the key name or field
6765 number. Leading and trailing spaces in this item were not being ignored,
6766 causing some misleading effects.
6768 5. When deliver_drop_privilege was set, single queue runner processes started
6769 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6770 same command in the process it spins off) were not dropping privilege.
6772 6. When the daemon running as "exim" started a queue runner, it always
6773 re-executed Exim in the spun-off process. This is a waste of effort when
6774 deliver_drop_privilege is set. The new process now just calls the
6775 queue-runner function directly.
6781 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6784 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6785 ignored. Though the use of -oP was forcing the writing of a pid file, it
6786 was always written to the default place.
6788 3. If the message "no IP address found for host xxxx" is generated during
6789 incoming verification, it is now followed by identification of the incoming
6790 connection (so you can more easily find what provoked it).
6792 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6794 5. Added some features to "harden" Exim a bit more against certain attacks:
6796 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6797 be put in Local/Makefile. This is like the never_users runtime option,
6798 but it cannot be overridden. The default setting is "root".
6800 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6801 prefix string with which any file named in a -C command line option
6804 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6805 is retained for -C and -D only if the caller of Exim is root. Without
6806 it, the exim user may also use -C and -D and retain privilege.
6808 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6809 command line option is disabled.
6811 6. Macro names set by the -D option must start with an upper case letter, just
6812 like macro names defined in the configuration file.
6814 7. Added "dereference=" facility to LDAP.
6816 8. Two instances of the typo "uknown" in the source files are fixed.
6818 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6819 the Configure-Makefile script screwed up while processing it.
6821 10. Incorporated PCRE 4.4.
6823 11. The SMTP synchronization check was not operating right at the start of an
6824 SMTP session. For example, it could not catch a HELO sent before the client
6825 waited for the greeting. There is now a check for outstanding input at the
6826 point when the greeting is written. Because of the duplex, asynchronous
6827 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6828 way, but not yet received, when the check is performed.
6830 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6831 on TCP/IP sockets, because this apparently causes some broken clients to
6834 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6835 unchanged) from the Cygwin maintainer.
6837 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6838 was supported instead of testing for mbx. Effectively a typo.
6840 15. The spa authenticator server code was not checking that the input it
6841 received was valid base64.
6843 16. The debug output line for the "set" modifier in ACLs was not showing the
6844 name of the variable that was being set.
6846 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6848 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6849 lookup on its own. Something else was needed to trigger the lookup. For
6850 example, a match in host_lookup or the need for a host name in a host list.
6851 Now, if $sender_host_name is referenced and the host name has not yet been
6852 looked up, a lookup is performed. If the lookup fails, the variable remains
6853 empty, and $host_lookup_failed is set to "1".
6855 19. Added "eqi" as a case-independent comparison operator.
6857 20. The saslauthd authentication condition could segfault if neither service
6858 nor realm was specified.
6860 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6861 error message that was logged was misleading, and incoming SMTP
6862 connections were dropped. The message is now more accurate, and temporary
6863 errors are given to SMTP connections.
6865 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6866 (except RSET) with a 421 error, until QUIT is received. However, it was
6867 failing to send a response to QUIT.
6869 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6870 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6871 ACL is now run after the helo_try_verify_hosts code.
6873 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6874 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6875 case-independent, so other case variants are also recognized). Apparently
6876 some systems use these upper case variants.
6878 25. If more than two messages were waiting for the same host, and a transport
6879 filter was specified for the transport, Exim sent two messages over the
6880 same TCP/IP connection, and then failed with "socket operation on non-
6881 socket" when it tried to send the third.
6883 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6885 27. The extern definition of crypt16() in expand.c was not being excluded when
6886 the OS had its own crypt16() function.
6888 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6889 as a preferred synonym for return_size_limit, both as an option and as an
6892 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6894 30. Changed the default configuration ACL to relax the local part checking rule
6895 for addresses that are not in any local domains. For these addresses,
6896 slashes and pipe symbols are allowed within local parts, but the sequence
6897 /../ is explicitly forbidden.
6899 31. SPA server authentication was not clearing the challenge buffer before
6902 32. log_message in a "warn" ACL statement was writing to the reject log as
6903 well as to the main log, which contradicts the documentation and doesn't
6904 seem right (because no rejection is happening). So I have stopped it.
6906 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6907 However, I am unable to do any testing of this.
6909 34. Fixed an infelicity in the appendfile transport. When checking directories
6910 for a mailbox, to see if any needed to be created, it was accidentally
6911 using path names with one or more superfluous leading slashes; tracing
6912 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6914 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6915 contents are added to the log line that is written for every discarded
6916 recipient. (Previously a log_message setting was ignored.)
6918 36. The ${quote: operator now quotes the string if it is empty.
6920 37. The install script runs exim in order to find its version number. If for
6921 some reason other than non-existence or emptiness, which it checks, it
6922 could not run './exim', it was installing it with an empty version number,
6923 i.e. as "exim-". This error state is now caught, and the installation is
6926 38. An argument was missing from the function that creates an error message
6927 when Exim fails to connect to the socket for saslauthd authentication.
6928 This could cause Exim to crash, or give a corrupted message.
6930 39. Added isip, isip4, and isip6 to ${if conditions.
6932 40. The ACL variables $acl_xx are now saved with the message, and can be
6933 accessed later in routers, transports, and filters.
6935 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6936 strings in the file are not string-expanded.
6938 42. If a MAIL command specified a SIZE value that was too large to fit into an
6939 int variable, the check against message_size_limit failed. Such values are
6940 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6941 day this will have to be increased, but I don't think I want to be around
6942 when emails are that large.
6949 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6950 iconv() is not standard in FreeBSD.
6952 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6953 IPv6 enabled. The observed symptom was a segmentation fault on return from
6954 the function os_common_find_running_interfaces() in src/os.c.
6956 3. In the check_special_case() function in daemon.c I had used "errno" as an
6957 argument name, which causes warnings on some systems. This was basically a
6958 typo, since it was named "eno" in the comments!
6960 4. The code that waits for the clock to tick (at a resolution of some fraction
6961 of a second) so as to ensure message-id uniqueness was always waiting for
6962 at least one whole tick, when it could have waited for less. [This is
6963 almost certainly not relevant at current processor speeds, where it is
6964 unlikely to ever wait at all. But we try to future-proof.]
6966 5. The function that sleeps for a time interval that includes fractions of a
6967 second contained a race. It did not block SIGALRM between setting the
6968 timer, and suspending (a couple of lines later). If the interval was short
6969 and the sigsuspend() was delayed until after it had expired, the suspension
6970 never ended. On busy systems this could lead to processes getting stuck for
6973 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6974 process, before it forks any delivery processes. The open lookup caching
6975 mechanism meant that the open file or database connection was passed into
6976 the delivery process. The problem was that delivery processes always tidy
6977 up cached lookup data. This could cause a problem for the next delivery
6978 process started by the queue runner, because the external queue runner
6979 process does not know about the closure. So the next delivery process
6980 still has data in the lookup cache. In the case of a file lookup, there was
6981 no problem because closing a file descriptor in a subprocess doesn't affect
6982 the parent. However, if the lookup was caching a connection to a database,
6983 the connection was closed, and the second delivery process was likely to
6984 see errors such as "PGSQL: query failed: server closed the connection
6985 unexpectedly". The problem has been fixed by closing all cached lookups
6986 in a queue runner before running a delivery process.
6988 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6989 seem to have the "const" qualifier which it has on other OS. I've
6992 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6993 *of the same type* (client or server) with the same public name that an
6994 error should be diagnosed.
6996 9. When Exim looked up a host name for an IP address, but failed to find the
6997 original IP address when looking up the host name (a safety check), it
6998 output the message "<ip address> does not match any IP for NULL", which was
6999 confusing, to say the least. The bug was that the host name should have
7000 appeared instead of "NULL".
7002 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7003 user that is built into the binary, and the -C or -D options is used, root
7004 privilege is dropped before the configuration file is read. In addition,
7005 logging is switched to stderr instead of the normal log files. If the
7006 configuration then re-defines the Exim user, the unprivileged environment
7007 is probably not what is expected, so Exim logs a panic warning message (but
7010 However, if deliver_drop_privilege is set, the unprivileged state may well
7011 be exactly what is intended, so the warning has been cut out in that case,
7012 and Exim is allowed to try to write to its normal log files.
7018 1. smtp_return_error_details was not giving details for temporary sender
7019 or receiver verification errors.
7021 2. Diagnose a configuration error if two authenticators have the same public
7024 3. Exim used not to create the message log file for a message until the first
7025 delivery attempt. This could be confusing when incoming messages were held
7026 for policy or load reasons. The message log file is now created at the time
7027 the message is received, and an initial "Received" line is written to it.
7029 4. The automatically generated man page for command line options had a minor
7030 bug that caused no ill effects; however, a more serious problem was that
7031 the procedure for building the man page automatically didn't always
7032 operate. Consequently, release 4.20 contains an out-of-date version. This
7033 shouldn't happen again.
7035 5. When building Exim with embedded Perl support, the script that builds the
7036 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7037 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7039 6. The freeze_tell option was not being used for messages that were frozen on
7040 arrival, either by an ACL or by local_scan().
7042 7. Added the smtp_incomplete_transaction log selector.
7044 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7045 was accepting AUTH without a new EHLO.
7047 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7048 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7051 10. Logging of TCP/IP connections (when configured) now happens in the main
7052 daemon process instead of the child process, so that the TCP/IP connection
7053 count is more accurate (but it can never be perfect).
7055 11. The use of "drop" in a nested ACL was not being handled correctly in the
7056 outer ACL. Now, if condition failure induced by the nested "drop" causes
7057 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7058 or "require"), the connection is dropped.
7060 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7061 that yield "discard" can now be used with an "accept" or a "discard" verb,
7062 but an error is generated for any others (because I can't see a useful way
7063 to define what should happen).
7065 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7066 are now processed in the same way as lines in the Exim configuration file.
7067 In particular, continuation lines are supported.
7069 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7071 15. Added -ti meaning -t -i.
7073 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7074 domains, and warn by logging if others are found.
7076 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7077 returned from GIFCONF when Exim is trying to find the list of interfaces on
7078 a host. The code in os.c has been modified to copy each ifreq to an aligned
7079 structure in all cases.
7081 Also, in some cases, the returned ifreq's were being copied to a 'struct
7082 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7083 means the last couple of bytes of an IPv6 address could be chopped if the
7084 ifreq contained only a normal sockaddr (14 bytes storage).
7086 18. Named domain lists were not supported in the hosts_treat_as_local option.
7087 An entry such as +xxxx was not recognized, and was treated as a literal
7090 19. Ensure that header lines added by a DATA ACL are included in the reject log
7091 if the ACL subsequently rejects the message.
7093 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7094 MD5 (which is deprecated).
7096 21. When testing a filter file using -bf, Exim was writing a message when it
7097 took the sender from a "From " line in the message, but it was not doing so
7098 when it took $return_path from a Return-Path: header line. It now does.
7100 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7101 with a valid header line field name (a series of printing characters
7102 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7104 23. Changed "disc" in the source to "disk" to conform to the documentation and
7105 the book and for uniformity.
7107 24. Ignore Sendmail's -Ooption=value command line item.
7109 25. When execve() failed while trying to run a command in a pipe transport,
7110 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7111 could be confused with a return value of 69 from the command itself. This
7112 has been changed to 127, the value the shell returns if it is asked to run
7113 a non-existent command. The wording for the related log line suggests a
7114 non-existent command as the problem.
7116 26. If received_header_text expands to an empty string, do not add a Received:
7117 header line to the message. (Well, it adds a token one on the spool, but
7118 marks it "old" so that it doesn't get used or transmitted.)
7120 27. Installed eximstats 1.28 (addition of -nt option).
7122 28. There was no check for failure on the call to getsockname() in the daemon
7123 code. This can fail if there is a shortage of resources on the system, with
7124 ENOMEM, for example. A temporary error is now given on failure.
7126 29. Contrary to the C standard, it seems that in some environments, the
7127 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7128 program. Exim now does this explicitly; it affects the formatting of
7129 timestamps using strftime().
7131 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7132 complaints. I've now initialized all the variables, to avoid this.
7134 32. Header lines added by a system filter were not being "seen" during
7135 transport-time rewrites.
7137 33. The info_callback() function passed to OpenSSL is set up with type void
7138 (*)(SSL *, int, int), as described somewhere. However, when calling the
7139 function (actually a macro) that sets it up, the type void(*)() is
7140 expected. I've put in a cast to prevent warnings from picky compilers.
7142 34. If a DNS black list lookup found a CNAME record, but there were no A
7143 records associated with the domain it pointed at, Exim crashed.
7145 35. If a DNS black list lookup returned more than one A record, Exim ignored
7146 all but the first. It now scans all returned addresses if a particular IP
7147 value is being sought. In this situation, the contents of the
7148 $dnslist_value variable are a list of all the addresses, separated by a
7151 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7152 to accept a host name and all its aliases if the forward lookup for any of
7153 them yielded the IP address of the incoming connection. Now it accepts only
7154 those names whose forward lookup yields the correct IP address. Any other
7155 names are discarded. This closes a loophole whereby a rogue DNS
7156 administrator could create reverse DNS records to break through a
7157 wildcarded host restriction in an ACL.
7159 37. If a user filter or a system filter that ran in a subprocess used any of
7160 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7161 the wrong values were passed to the pipe command ($thisaddress had the
7162 value of $0, $0 had the value of $1, etc). This bug was introduced by
7163 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7165 38. Improved the line breaking for long SMTP error messages from ACLs.
7166 Previously, if there was no break point between 40 and 75 characters, Exim
7167 left the rest of the message alone. Two changes have been made: (a) I've
7168 reduced the minimum length to 35 characters; (b) if it can't find a break
7169 point between 35 and 75 characters, it looks ahead and uses the first one
7170 that it finds. This may give the occasional overlong line, but at least the
7171 remaining text gets split now.
7173 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7174 file descriptors might be low, and that setting 1000 would always raise it.
7175 It turns out that in some environments, the limit is already over 1000 and
7176 that lowering it causes trouble. So now Exim takes care not to decrease it.
7178 40. When delivering a message, the value of $return_path is set to $sender_
7179 address at the start of routing (routers may change the value). By an
7180 oversight, this default was not being set up when an address was tested by
7181 -bt or -bv, which affected the outcome if any router or filter referred to
7184 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7185 log only when "message" or "log_message" are set. However, if one of the
7186 conditions was an address verification, or a call to a nested ACL, the
7187 messages generated by the underlying test were being passed through. This
7188 no longer happens. The underlying message is available in $acl_verify_
7189 message for both "message" and "log_message" expansions, so it can be
7190 passed through if needed.
7192 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7193 new expansion $bh_ to give the encoded byte string without charset
7194 translation. Translation happens only if iconv() is available; HAVE_ICONV
7195 indicates this at build time. HEADERS_CHARSET gives the charset to
7196 translate to; headers_charset can change it in the configuration, and
7197 "headers charset" can change it in an individual filter file.
7199 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7200 that creates RFC 2047 encoded "words" labels them as that charset instead
7201 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7202 expansion operator; (ii) when Exim creates a From: line for a local
7203 message; (iii) when a header line is rewritten to include a "phrase" part.
7205 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7206 buggy, causing it to skip the first lines of messages whose message ID
7207 ended in 'D'. This would not have bitten before Exim release 4.14, because
7208 message IDs were unlikely to end in 'D' before then. The effect was to have
7209 incorrect size information for certain domains.
7211 45. #include "config.h" was missing at the start of the crypt16.c module. This
7212 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7215 46. If there was a timeout during a "random" callout check, Exim treated it as
7216 a failure of the random address, and carried on sending RSET and the real
7217 address. If the delay was just some slowness somewhere, the response to the
7218 original RCPT would be taken as a response to RSET and so on, causing
7219 mayhem of various kinds.
7221 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7222 when I implemented it. It didn't allow for the fact that some option values
7223 may legitimately be negative (e.g. size_addition), and it didn't even do
7224 the right test for positive values.
7226 48. Domain names in DNS records are case-independent. Exim always looks them up
7227 in lower case. Some resolvers return domain names in exactly the case they
7228 appear in the zone file, that is, they may contain uppercase letters. Not
7229 all resolvers do this - some return always lower case. Exim was treating a
7230 change of case by a resolver as a change of domain, similar to a widening
7231 of a domain abbreviation. This triggered its re-routing code and so it was
7232 trying to route what was effectively the same domain again. This normally
7233 caused routing to fail (because the router wouldn't handle the domain
7234 twice). Now Exim checks for this case specially, and just changes the
7235 casing of the domain that it ultimately uses when it transmits the message
7238 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7241 50. If a filter generated a file delivery with a non-absolute name (possible if
7242 no home directory exists for the router), the forbid_file option was not
7245 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7246 the existing equality matching.
7248 52. Exim was using ints instead of ino_t variables in some places where it was
7249 dealing with inode numbers.
7251 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7252 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7253 called TMPDIR, and if it finds it is different, it changes its value.
7255 54. The smtp_printf() function is now made available to local_scan() so
7256 additional output lines can be written before returning. There is also an
7257 smtp_fflush() function to enable the detection of a dropped connection.
7258 The variables smtp_input and smtp_batched_input are exported to
7261 55. Changed the default runtime configuration: the message "Unknown user"
7262 has been removed from the ACL, and instead placed on the localuser router,
7263 using the cannot_route_message feature. This means that any verification
7264 failures that generate their own messages won't get overridden. Similarly,
7265 the "Unrouteable address" message that was in the ACL for unverifiable
7266 relay addresses has also been removed.
7268 56. Added hosts_avoid_esmtp to the smtp transport.
7270 57. The exicyclog script was not checking for the esoteric option
7271 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7272 will work only if exicyclog is run under the appropriate euid.
7274 58. Following a discussion on the list, the rules by which Exim recognises line
7275 endings on incoming messages have been changed. The -dropcr and drop_cr
7276 options are now no-ops, retained only for backwards compatibility. The
7277 following line terminators are recognized: LF CRLF CR. However, special
7278 processing applies to CR:
7280 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7281 nor a local message in the state where . is a terminator.
7283 (ii) If a bare CR is encountered in a header line, an extra space is added
7284 after the line terminator so as not to end the header. The reasoning
7285 behind this is that bare CRs in header lines are most likely either
7286 to be mistakes, or people trying to play silly games.
7288 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7289 was being incorrectly given as 18 bytes larger than it should have been.
7290 This is a VOB (very old bug).
7292 60. This may never have affected anything current, but just in case it has:
7293 When the local host is found other than at the start of a list of hosts,
7294 the local host, those with the same MX, and any that follow, are discarded.
7295 When the list in question was part of a longer list of hosts, the following
7296 hosts (not currently being processed) were also being discarded. This no
7297 longer happens. I'm not sure if this situation could ever has previously
7300 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7303 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7304 header. This is something that is recommended in a new Internet Draft, and
7305 is something that is documented as being done by Sendmail. There are two
7306 possible values. For messages generated by the autoreply transport, Exim
7309 Auto-Submitted: auto-replied
7311 whereas for all other generated messages (e.g. bounces) it adds
7313 Auto-Submitted: auto-generated
7315 63. The "personal" condition in filters now includes a test for the
7316 Auto-Submitted: header. If it contains the string "auto-" the message it
7317 not considered personal.
7319 64. Added rcpt_include_affixes as a generic transport option.
7321 65. Added queue_only_override (default true).
7323 66. Added the syslog_duplication option.
7325 67. If what should have been the first header line of a message consisted of
7326 a space followed by a colon, Exim was mis-interpreting it as a header line.
7327 It isn't of course - it is syntactically invalid and should therefore be
7328 treated as the start of the message body. The misbehaviour could have
7329 caused a number of strange effects, including loss of data in subsequent
7330 header lines, and spool format errors.
7332 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7333 client host had authenticated. This control can now be exercised by an ACL
7334 for more flexibility.
7336 69. By default, callouts do not happen when testing with -bh. There is now a
7337 variant, -bhc, which does actually run the callout code, including
7338 consulting and updating the callout cache.
7340 70. Added support for saslauthd authentication, courtesy of Alexander
7343 71. If statvfs() failed on the spool or log directories while checking their
7344 size for availability, Exim confusingly gave the error "space shortage".
7345 Furthermore, in debugging mode it crashed with a floating point exception.
7346 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7347 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7348 serious problem, Exim now writes to the main and panic logs when this
7349 happens, with details of the failure. It then refuses to accept the
7350 incoming message, giving the message "spool directory problem" or "log
7351 directory problem" with a 421 code for SMTP messages.
7353 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7354 0, 1, and 2 exist, because some OS complain for execs without them (see
7355 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7356 descriptors. However, the code omitted to check that the open succeeded,
7357 causing mysterious errors if for some reason the permissions on /dev/null
7358 got screwed. Now Exim writes a message to the main and panic logs, and
7359 bombs out if it can't open /dev/null.
7361 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7362 interact so that it is all more flexible. It is supposed to remain
7363 backwards compatible. Also added extra_local_interfaces.
7365 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7366 to bomb out with an assertion failure - to the client this appears as a
7367 connection drop. This problem occurs in the part of the code that was taken
7368 from the Samba project. Fortunately, the assertion is in a very simple
7369 function, so I have fixed this by reproducing the function inline in the
7370 one place where it is called, and arranging for authentication to fail
7371 instead of killing the process with assert().
7373 75. The SPA client code was not working when the server requested OEM rather
7374 than Unicode encoding.
7376 76. Added code to make require_files with a specific uid setting more usable in
7377 the case where statting the file as root fails - usually a non-root-mounted
7378 NFS file system. When this happens and the failure is EACCES, Exim now
7379 forks a subprocess and does the per-uid checking as the relevant uid.
7381 77. Added process_log_path.
7383 78. If log_file_path was not explicitly set, a setting of check_log_space or
7384 check_log_inodes was ignored.
7386 79. If a space check for the spool or log partitions fails, the incident is now
7387 logged. Of course, in the latter case the data may get lost...
7389 80. Added the %p formatting code to string_format() so that it can be used to
7390 print addresses in debug_print(). Adjusted all the address printing in the
7391 debugging in store.c to use %p rather than %d.
7393 81. There was a concern that a line of code in smtp_in.c could overflow a
7394 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7395 initially expressed, the concern was not well-founded, because trailing
7396 spaces are removed early. However, if the trailing spaces were followed by
7397 a NULL, they did not get removed, so the overflow was possible. Two fixes
7400 (a) I re-wrote the offending code in a cleaner fashion.
7401 (b) If an incoming SMTP command contains a NULL character, it is rejected
7404 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7405 runs initgroups(), so that if the Exim user is in any additional groups,
7406 they will be used during message reception.
7412 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob