1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
12 buffer overrun for (non-chunking) other transports.
14 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
15 TLS1.3, means that a server rejecting a client certificate is not visible
16 to the client until the first read of encrypted data (typically the
17 response to EHLO). Add detection for that case and treat it as a failed
18 TLS connection attempt, so that the normal retry-in-clear can work (if
21 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
22 and/or domain. Found and fixed by Jason Betts.
24 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
25 configuration). If a CNAME target was not a wellformed name pattern, a
28 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
29 the OS reports them interleaved with other addresses.
31 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
32 used both for input and for a verify callout, both encrypted, SMTP
33 responses being sent by the server could be lost. This resulted in
34 dropped connections and sometimes bounces generated by a peer sending
41 JH/01 Remove code calling the customisable local_scan function, unless a new
42 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
44 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
45 non-signal-safe functions being used.
47 JH/03 Bug 2269: When presented with a received message having a stupidly large
48 number of DKIM-Signature headers, disable DKIM verification to avoid
49 a resource-consumption attack. The limit is set at twenty.
51 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
52 report of oldest_pass in ${authres } in consequence, and separate out
53 some descriptions of reasons for verification fail.
55 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
56 files in the spool were present and unlocked. A queue-runner could spot
57 them, resulting in a duplicate delivery. Fix that by doing the unlock
58 after the unlink. Investigation by Tim Stewart. Take the opportunity to
59 add more error-checking on spoolfile handling while that code is being
62 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
63 No known attacks, no CVE, this is defensive hardening.
65 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
66 a queue-runner could start a delivery while other operations were ongoing.
67 Cutthrough delivery was a common victim, resulting in duplicate delivery.
68 Found and investigated by Tim Stewart. Fix by using the open message data
69 file handle rather than opening another, and not locally closing it (which
70 releases a lock) for that case, while creating the temporary .eml format
71 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
73 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
74 $sender_verify_failure/$recipient_verify_failure to "random".
76 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
79 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
80 Previously this would segfault.
82 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
85 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
86 like zero, since the resolver should be doing this for us, But we need one
87 as a CNAME but no MX presence gets the CNAME returned; we need to check
88 that doesn't point to an MX to declare it "no MX returned" rather than
89 "error, loop". A new main option is added so the older capability of
90 following some limited number of chain links is maintained.
92 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
94 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
95 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
96 now-deprecated earlier definitions used only specified the range up to TLS
97 1.2 (in the older-version library docs).
99 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
101 JH/15 Rework TLS client-side context management. Stop using a global, and
102 explicitly pass a context around. This enables future use of TLS for
103 connections to service-daemons (eg. malware scanning) while a client smtp
104 connection is using TLS; with cutthrough connections this is quite likely.
106 JH/16 Fix ARC verification to do AS checks in reverse order.
108 JH/17 Support a "tls" option on the ${readsocket } expansion item.
110 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
111 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
112 Previously the "utf8" would be re-prepended for every additional message.
114 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
115 Previously thery were accepted, resulting in issues when attempting to
116 forward messages to a non-supporting MTA.
118 PP/02 Let -n work with printing macros too, not just options.
120 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
121 one parent address was copied, and bogus data was used at delivery-logging
122 time. Either a crash (after delivery) or bogus log data could result.
123 Discovery and analysis by Tim Stewart.
125 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
126 Previously if the string ended mid-character, we did not insert the
127 promised '?' replacement.
129 PP/04 Documentation: current string operators work on bytes, not codepoints.
131 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
132 should pack well giving a smaller memory footprint so better caching and
133 therefore performance. Group the declarations where this can't be done so
134 that the byte-sized flag variables are not interspersed among pointer
135 variables, giving a better chance of good packing by the compiler.
137 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
138 non-null, to avoid issues with sites running BATV. Previously reports were
139 sent with an empty envelope sender so looked like bounces.
141 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
142 The ignore_error flag wasn't being returned from the filter subprocess so
143 was not set for later routers. Investigation and fix by Matthias Kurz.
145 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
146 and a msg:complete for the whole, when a message is manually removed using
147 -Mrm. Developement by Matthias Kurz, hacked on by JH.
149 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
150 a "Gnu special" function, asprintf() in the DB utility binary builds; I
151 hope that is portable enough.
153 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
154 requiring a known-CA anchor certificate; make it now rely entirely on the
155 TLSA as an anchor. Checking the name on the leaf cert against the name
156 on the A-record for the host is still done for TA (but not for EE mode).
158 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
159 included in delivery lines for non-proxied connections, when compiled with
160 SUPPORT_SOCKS and running with proxy logging enabled.
162 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
163 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
164 move the existing event to fire before the normal logging of message
165 failure so that custom logging is bracketed by normal logging.
167 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
168 msg:fail:internal event. Developement by Matthias Kurz.
170 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
171 far too small for todays use of crypto signatures stored there. Go all
172 the way to the max DNS message size of 64kB, even though this might be
173 overmuch for IOT constrained device use.
175 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
176 copy a string over itself. The library routine is documented as not
177 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
179 JH/32 For main options check_spool_space and check_inode_space, where the
180 platform supports 64b integers, support more than the previous 2^31 kB
181 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
182 the previous G, M, k.
184 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
185 $authenticated_fail_id variable on authentication failure. Previously
188 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
189 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
190 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
191 GNUTLS_SEC_PARAM_MEDIUM.
193 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
194 side. Previously we would continue as if no SNI had been received.
196 JH/36 Harden the handling of string-lists. When a list consisted of a sole
197 "<" character, which should be a list-separator specification, we walked
198 off past the nul-terimation.
200 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
201 causes) even when the retry time is not yet met. Previously they were
202 not, meaning that when (say) an account was over-quota and temp-rejecting,
203 and multiple senders' messages were queued, only one sender would get
204 notified on each configured delay_warning cycle.
206 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
208 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
209 cipher-suites, an error can be left on the stack even for a succeeding
210 accept; this results in impossible error messages when a later operation
213 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
214 return error codes indicating retry. Under TLS1.3 this becomes required.
216 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
217 it only wrote the new authenticators, resulting in a lack of tracking of
218 peer changes of ESMTP extensions until the next cache flush.
220 JH/41 Fix the loop reading a message header line to check for integer overflow,
221 and more-often against header_maxsize. Previously a crafted message could
222 induce a crash of the recive process; now the message is cleanly rejected.
224 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
225 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
231 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
232 When redis_servers is set to a list of > 1 element, and the Redis servers
233 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
234 case of MOVED into a DEFER case instead, thus moving the query onto the
235 next server in the list. For a cluster of N elements, all N servers must
236 be defined in redis_servers.
238 GF/02 Catch and remove uninitialized value warning in exiqsumm
239 Check for existence of @ARGV before looking at $ARGV[0]
241 JH/01 Replace the store_release() internal interface with store_newblock(),
242 which internalises the check required to safely use the old one, plus
243 the allocate and data copy operations duplicated in both (!) of the
244 extant use locations.
246 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
247 modifier. This matches the restriction on the commandline.
249 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
250 Previously only the last row was returned.
252 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
253 we assumed that tags in the header were well-formed, and parsed the
254 element content after inspecting only the first char of the tag.
255 Assumptions at that stage could crash the receive process on malformed
258 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
259 While running the DKIM ACL we operate on the Permanent memory pool so that
260 variables created with "set" persist to the DATA ACL. Also (at any time)
261 DNS lookups that fail create cache records using the Permanent pool. But
262 expansions release any allocations made on the current pool - so a dnsdb
263 lookup expansion done in the DKIM ACL releases the memory used for the
264 DNS negative-cache, and bad things result. Solution is to switch to the
265 Main pool for expansions.
266 While we're in that code, add checks on the DNS cache during store_reset,
267 active in the testsuite.
268 Problem spotted, and debugging aided, by Wolfgang Breyha.
270 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
271 When none of the hosts presented to a transport match an already-open
272 connection, close it and proceed with the list. Previously we would
273 queue the message. Spotted by Lena with Yahoo, probably involving
276 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
277 Previously a spurious "250 OK id=" response was appended to the proper
280 JH/08 The "support for" informational output now, which built with Content
281 Scanning support, has a line for the malware scanner interfaces compiled
282 in. Interface can be individually included or not at build time.
284 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
285 by the template makefile "src/EDITME". The "STREAM" support for an older
286 ClamAV interface method is removed.
288 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
289 rows affected is given instead).
291 JH/11 The runtime Berkeley DB library version is now additionally output by
292 "exim -d -bV". Previously only the compile-time version was shown.
294 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
295 SMTP connection. Previously, when one had more receipients than the
296 first, an abortive onward connection was made. Move to full support for
297 multiple onward connections in sequence, handling cutthrough connection
298 for all multi-message initiating connections.
300 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
301 routers. Previously, a multi-recipient message would fail to match the
302 onward-connection opened for the first recipient, and cause its closure.
304 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
305 a timeout on read on a GnuTLS initiating connection, resulting in the
306 initiating connection being dropped. This mattered most when the callout
307 was marked defer_ok. Fix to keep the two timeout-detection methods
310 JH/15 Relax results from ACL control request to enable cutthrough, in
311 unsupported situations, from error to silently (except under debug)
312 ignoring. This covers use with PRDR, frozen messages, queue-only and
315 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
317 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
318 metadata, resulting in a crash in free().
320 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
321 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
322 Broken also in d185889f4, with init system revamp.
324 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
325 Previously we abruptly closed the connection after reading a malware-
326 found indication; now we go on to read the "scan ok" response line,
329 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
330 ACL. Previously, a crash would result.
332 JH/19 Speed up macro lookups during configuration file read, by skipping non-
333 macro text after a replacement (previously it was only once per line) and
334 by skipping builtin macros when searching for an uppercase lead character.
336 JH/20 DANE support moved from Experimental to mainline. The Makefile control
337 for the build is renamed.
339 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
340 was allocated for every new TLS startup, meaning one per message. Fix
341 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
343 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
344 reported the original. Fix to report (as far as possible) the ACL
345 result replacing the original.
347 JH/23 Fix memory leak during multi-message connections using STARTTLS under
348 OpenSSL. Certificate information is loaded for every new TLS startup,
349 and the resources needed to be freed.
351 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
353 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
356 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
357 DATA response info to the (existing) per-recipient response info for
358 the "C=" log element. It can have useful tracking info from the
359 destination system. Patch from Simon Arlott.
361 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
362 length value. Previously this would segfault.
364 HS/02 Support Avast multiline protoocol, this allows passing flags to
365 newer versions of the scanner.
367 JH/28 Ensure that variables possibly set during message acceptance are marked
368 dead before release of memory in the daemon loop. This stops complaints
369 about them when the debug_store option is enabled. Discovered specifically
370 for sender_rate_period, but applies to a whole set of variables.
371 Do the same for the queue-runner and queue-list loops, for variables set
372 from spool message files. Do the same for the SMTP per-message loop, for
373 certain variables indirectly set in ACL operations.
375 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
376 as a multi-recipient message from a mailinglist manager). The coding had
377 an arbitrary cutoff number of characters while checking for more input;
378 enforced by writing a NUL into the buffer. This corrupted long / fast
379 input. The problem was exposed more widely when more pipelineing of SMTP
380 responses was introduced, and one Exim system was feeding another.
381 The symptom is log complaints of SMTP syntax error (NUL chars) on the
382 receiving system, and refused recipients seen by the sending system
383 (propating to people being dropped from mailing lists).
384 Discovered and pinpointed by David Carter.
386 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
387 replaced by the ${authresults } expansion.
389 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
391 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
392 allows proper process termination in container environments.
394 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
395 Previously the "final dot" had a newline after it; ensure it is CR,LF.
397 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
398 and "err_perm", deprecated since 4.83 when the RFC-defined words
399 "temperror" and "permerror" were introduced.
401 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
402 transport-filters or DKIM-signing. The restriction was lost in the
403 consolidation of verify-callout and delivery SMTP handling.
404 Extend the restriction to also cover ARC-signing.
406 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
407 in defer=pass mode supply a 450 to the initiator. Previously the message
410 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
411 tls_require_ciphers is used as before.
413 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
414 "pass_unscanned". Only tmpfails from the scanner are written to
415 the paniclog, as they may require admin intervention (permission
416 denied, license issues). Other scanner errors (like decompression
417 bombs) do not cause a paniclog entry.
419 JH/36 Fix reinitialisation of DKIM logging variable between messages.
420 Previously it was possible to log spurious information in receive log
423 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
424 triggered odd behaviour from Outlook Express clients.
426 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
429 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
430 since the IETF WG has not yet settled on that versus the original
431 "bare" representation.
433 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
434 Previously the millisecond value corrupted the output.
435 Fix also for syslog_pid=no and log_selector +pid, for which the pid
436 corrupted the output.
442 JH/01 Rework error string handling in TLS interface so that the caller in
443 more cases is responsible for logging. This permits library-sourced
444 string to be attached to addresses during delivery, and collapses
445 pairs of long lines into single ones.
447 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
448 during configuration. Wildcards are allowed and expanded.
450 JH/02 Rework error string handling in DKIM to pass more info back to callers.
451 This permits better logging.
453 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
454 do not close it down and have the child transport start it up again on
455 the passed-on TCP connection. Instead, proxy the child (and any
456 subsequent ones) for TLS via a unix-domain socket channel. Logging is
457 affected: the continued delivery log lines do not have any DNSSEC, TLS
458 Certificate or OCSP information. TLS cipher information is still logged.
460 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
461 identical IP addresses on different listening ports. Will also affect
464 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
465 add noisy ifdef guards to special-case this sillyness.
466 Patch from Bernd Kuhls.
468 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
469 than 255 are no longer allowed.
471 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
472 Disable the session-cache too, which might reduce our load. Since we
473 currrectly use a new context for every connection, both as server and
474 client, there is no benefit for these.
475 GnuTLS appears to not support tickets server-side by default (we don't
476 call gnutls_session_ticket_enable_server()) but client side is enabled
477 by default on recent versions (3.1.3 +) unless the PFS priority string
480 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
481 <https://reproducible-builds.org/specs/source-date-epoch/>.
483 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
484 the check for any unsuccessful recipients did not notice the limit, and
485 erroneously found still-pending ones.
487 JH/08 Pipeline CHUNKING command and data together, on kernels that support
488 MSG_MORE. Only in-clear (not on TLS connections).
490 JH/09 Avoid using a temporary file during transport using dkim. Unless a
491 transport-filter is involved we can buffer the headers in memory for
492 creating the signature, and read the spool data file once for the
493 signature and again for transmission.
495 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
496 4.77 as the kernel support then wasn't solid, having issues in 64bit
497 mode. Now, it's been long enough. Add support for FreeBSD also.
499 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
500 case where the routing stage had gathered several addresses to send to
501 a host before calling the transport for the first, we previously failed
502 to close down TLS in the old transport process before passing the TCP
503 connection to the new process. The new one sent a STARTTLS command
504 which naturally failed, giving a failed delivery and bloating the retry
505 database. Investigation and fix prototype from Wolfgang Breyha.
507 JH/12 Fix check on SMTP command input synchronisation. Previously there were
508 false-negatives in the check that the sender had not preempted a response
509 or prompt from Exim (running as a server), due to that code's lack of
510 awareness of the SMTP input buffering.
512 PP/04 Add commandline_checks_require_admin option.
513 Exim drops privileges sanely, various checks such as -be aren't a
514 security problem, as long as you trust local users with access to their
515 own account. When invoked by services which pass untrusted data to
516 Exim, this might be an issue. Set this option in main configuration
517 AND make fixes to the calling application, such as using `--` to stop
520 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
521 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
522 responses to those, into a single TLS record each way (this usually means
523 a single packet). As a side issue, smtp_enforce_sync now works on TLS
526 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
527 affects you only if you're dancing at the edge of the param size limits.
528 If you are, and this message makes sense to you, then: raise the
529 configured limit or use OpenSSL 1.1. Nothing we can do for older
532 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
533 cmdline element to get the documented default one. Previously it was
536 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
537 are unsuable for non-message-specific reasons - eg. connection timeout,
538 banner-time rejection.
540 JH/16 Fix logging of delivery remote port, when specified by router, under
543 PP/06 Repair manualroute's ability to take options in any order, even if one
544 is the name of a transport.
547 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
549 JH/17 Change the list-building routines interface to use the expanding-string
550 triplet model, for better allocation and copying behaviour.
552 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
553 Previously it was constructed the first time a possibly-matching string
554 was met in the configuration file input during startup; now it is done
557 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
558 compatible one, to avoid the (poorly documented) possibility of a config
559 file in the working directory redirecting the DB files, possibly correpting
560 some existing file. CVE-2017-10140 assigned for BDB.
562 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
563 cache-hot. Previously, although the result was properly cached, the
564 initial verify call returned a defer.
566 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
567 the main verify for receipient in uncached-mode.
569 JH/22 Retire historical build files to an "unsupported" subdir. These are
570 defined as "ones for which we have no current evidence of testing".
572 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
573 if present. Previously it was ignored.
575 JH/24 Start using specified-initialisers in C structure init coding. This is
576 a C99 feature (it's 2017, so now considered safe).
578 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
579 if was a fixed-sized field and bitmask ops via macros; it is now more
582 PP/07 GitHub PR 56: Apply MariaDB build fix.
583 Patch provided by Jaroslav Škarvada.
585 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
586 during Coverity cleanups [4.87 JH/47]
587 Diagnosis and fix provided by Michael Fischer v. Mollard.
589 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
590 the right size to place the terminating semicolon on its own folded
591 line, the header hash was calculated to an incorrect value thanks to
592 the (relaxed) space the fold became.
594 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
595 and confused the parent.
597 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
598 which could crash as a result. This could lead to undeliverable messages.
600 JH/28 Logging: "next input sent too soon" now shows where input was truncated
603 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
604 matters on fast-turnover and PID-randomising systems, which were getting
605 out-of-order delivery.
607 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
608 a possibly-overlapping copy. The symptom was that "Remote host closed
609 connection in response to HELO" was logged instead of the actual 4xx
612 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
613 Previously only that bufferd was discarded, resulting in SYMTP command
616 JH/32 DKIM: when a message has multiple signatures matching an identity given
617 in dkim_verify_signers, run the dkim acl once for each. Previously only
618 one run was done. Bug 2189.
620 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
621 "panic the current process" to "deliberately defer". The panic log is
622 still written with the problem list name; the mail and reject logs now
623 get a temp-reject line for the message that was being handled, saying
624 something like "domains check lookup or other defer". The SMTP 451
625 message is still "Temporary local problem".
627 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
628 A crafted sequence of BDAT commands could result in in-use memory beeing
629 freed. CVE-2017-16943.
631 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
632 from SMTP input. Previously it was always done; now only done for DATA
633 and not BDAT commands. CVE-2017-16944.
635 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
636 to the message (such as an overlong header line). Previously this was
637 not done and we did not exit BDAT mode. Followon from the previous item
638 though a different problem.
644 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
645 than -2003 did; needs libidn2 in addition to libidn.
647 JH/02 The path option on a pipe transport is now expanded before use.
649 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
650 Patch provided by "Björn", documentation fix added too.
652 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
653 missing a wire-to-host endian conversion.
655 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
656 close after a BDAT command line could be taken as a following command,
657 giving a synch failure. Fix by only checking for synch immediately
658 before acknowledging the chunk.
660 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
661 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
662 macro. Patches provided by Josh Soref.
664 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
665 Previously we did not; the RFC seems ambiguous and VRFY is not listed
666 by IANA as a service extension. However, John Klensin suggests that we
669 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
670 the dkim code may be unix-mode line endings rather than smtp wire-format
671 CRLF, so prepend a CR to any bare LF.
673 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
674 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
676 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
677 the first were themselves being wrongly included in the feed into dkim
678 processing; with most chunk sizes in use this resulted in an incorrect
679 body hash calculated value.
681 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
682 DKIM signature block, for verification. Although advised against by
683 standards it is specifically not ruled illegal.
685 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
687 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
688 missing a body hash (the bh= tag).
690 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
691 It seems that HAProxy sends the Proxy Protocol information in clear and
692 only then does a TLS startup, so do the same.
694 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
695 TCP connections (such as for Spamd) unless the daemon successfully set
696 Fast Open mode on its listening sockets. This fixes breakage seen on
697 too-old kernels or those not configured for Fast Open, at the cost of
698 requiring both directions being enabled for TFO, and TFO never being used
699 by non-daemon-related Exim processes.
701 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
702 endings, at least on the first header line. Try to canonify any that get
703 past that check, despite the cost.
705 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
706 now limited to an arbitrary five deep, while parsing addresses with the
707 strip_excess_angle_brackets option enabled.
709 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
710 instead leave the unprompted TLS handshake in socket buffer for the
711 TLS library to consume.
713 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
715 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
717 JH/16 Drop variables when they go out of scope. Memory management drops a whole
718 region in one operation, for speed, and this leaves assigned pointers
719 dangling. Add checks run only under the testsuite which checks all
720 variables at a store-reset and panics on a dangling pointer; add code
721 explicitly nulling out all the variables discovered. Fixes one known
722 bug: a transport crash, where a dangling pointer for $sending_ip_address
723 originally assigned in a verify callout, is re-used.
725 PP/06 Drop '.' from @INC in various Perl scripts.
727 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
729 PP/08 Reduce a number of compilation warnings under clang; building with
730 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
731 should be warning-free.
733 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
735 HS/01 Fix portability problems introduced by PP/08 for platforms where
736 realloc(NULL) is not equivalent to malloc() [SunOS et al].
738 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
739 chunk. This allows us to accept broken chunked messages. We need a more
740 general solution here.
742 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
743 already-broken messages in the queue.
745 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
747 JH/19 Fix reference counting bug in routing-generated-address tracking.
753 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
754 supports it and a size is available (ie. the sending peer gave us one).
756 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
757 years of being deprecated). The replacements are the ACLs
758 acl_smtp_mime and acl_not_smtp_mime.
760 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
761 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
762 or even an in-clear connection were permitted. Now, if the host lookup
763 was dnssec and dane was requested then the host is only used if the
764 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
765 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
766 if one fails this test.
767 This means that a poorly-configured remote DNS will make it incommunicado;
768 but it protects against a DNS-interception attack on it.
770 JH/04 Bug 1810: make continued-use of an open smtp transport connection
771 non-noisy when a race steals the message being considered.
773 JH/05 If main configuration option tls_certificate is unset, generate a
774 self-signed certificate for inbound TLS connections.
776 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
777 in rewrites and routers.
779 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
780 and logged a warning sing 4.83; now they are a configuration file error.
782 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
783 (lacking @domain). Apply the same qualification processing as RCPT.
785 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
787 JH/10 Support ${sha256:} applied to a string (as well as the previous
790 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
791 a cutthrough deliver is pending, as we always want to make a connection.
792 This also avoids re-routing the message when later placing the cutthrough
793 connection after a verify cache hit.
794 Do not update it with the verify result either.
796 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
797 when routing results in more than one destination address.
799 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
800 signing (which inhibits the cutthrough capability). Previously only
801 the presence of an option was tested; now an expansion evaluating as
802 empty is permissible (obviously it should depend only on data available
803 when the cutthrough connection is made).
805 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
806 the relevant preceding SMTP command did not note the pipelining mode.
808 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
809 Previously they were not counted.
811 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
812 as one having no matching records. Previously we deferred the message
813 that needed the lookup.
815 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
816 distinguished as "(=".
818 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
819 for missing MX records. Previously it only worked for missing A records.
821 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
823 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
824 after the data-go-ahead and data-ack. Patch from Jason Betts.
826 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
827 even for a "none" policy. Patch from Tony Meyer.
829 JH/22 Fix continued use of a connection for further deliveries. If a port was
830 specified by a router, it must also match for the delivery to be
833 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
834 When one of the recipients of a message was unsuitable for the connection
835 (has no matching addresses), we lost track of needing to mark it
836 deferred. As a result mail would be lost.
838 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
840 JH/25 Decoding ACL controls is now done using a binary search; the source code
841 takes up less space and should be simpler to maintain. Merge the ACL
842 condition decode tables also, with similar effect.
844 JH/26 Fix problem with one_time used on a redirect router which returned the
845 parent address unchanged. A retry would see the parent address marked as
846 delivered, so not attempt the (identical) child. As a result mail would
849 JH/27 Fix a possible security hole, wherein a process operating with the Exim
850 UID can gain a root shell. Credit to http://www.halfdog.net/ for
851 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
854 JH/28 Enable {spool,log} filesystem space and inode checks as default.
855 Main config options check_{log,spool}_{inodes,space} are now
856 100 inodes, 10MB unless set otherwise in the configuration.
858 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
859 Previously it only applied to the main-section connection policy
862 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
864 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
865 by me. Added RFC7919 DH primes as an alternative.
867 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
868 are not in the system include path.
870 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
871 GnuTLS, when a session startup failed (eg because the client disconnected)
872 Exim did stdio operations after fclose. This was exposed by a recent
873 change which nulled out the file handle after the fclose.
875 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
876 signed directly by the cert-signing cert, rather than an intermediate
877 OCSP-signing cert. This is the model used by LetsEncrypt.
879 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
881 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
882 an incoming connection.
884 HS/02 Bug 1802: Do not half-close the connection after sending a request
887 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
888 fallback to "prime256v1".
890 JH/34 SECURITY: Use proper copy of DATA command in error message.
891 Could leak key material. Remotely exploitable. CVE-2016-9963.
897 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
898 and 3.4.4 - once the server is enabled to respond to an OCSP request
899 it does even when not requested, resulting in a stapling non-aware
900 client dropping the TLS connection.
902 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
903 support variable-length bit vectors. No functional change.
905 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
906 The I= interface field on outgoing lines is now after the H= remote
907 host field, same as incoming lines. There is a separate
908 outgoing_interface log selector which allows you to disable the
911 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
912 If not running log_selector +smtp_connection the mainlog would be held
913 open indefinitely after a "too many connections" event, including to a
914 deleted file after a log rotate. Leave the per net connection logging
915 leaving it open for efficiency as that will be quickly detected by the
916 check on the next write.
918 HS/01 Bug 1671: Fix post transport crash.
919 Processing the wait-<transport> messages could crash the delivery
920 process if the message IDs didn't exist for some reason. When
921 using 'split_spool_directory=yes' the construction of the spool
922 file name failed already, exposing the same netto behaviour.
924 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
925 mime_regex ACL conditions.
927 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
928 to DSN fail messages (bounces): remote IP, remote greeting, remote response
929 to HELO, local diagnostic string.
931 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
932 log line to debug. Even when configured with a tls authenticator many
933 client connections are expected to not authenticate in this way, so
934 an authenticate fail is not an error.
936 HS/02 Add the Exim version string to the process info. This way exiwhat
937 gives some more detail about the running daemon.
939 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
940 matter for fast-change records such as DNSBLs.
942 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
943 retry record, even if constant. There may be multiple transports with
944 different interface settings and the retry behaviour needs to be kept
947 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
949 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
951 JH/10 Bug 840: fix log_defer_output option of pipe transport
953 JH/11 Bug 830: use same host for all RCPTS of a message, even under
954 hosts_randomize. This matters a lot when combined with mua_wrapper.
956 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
957 ${quote_pgsql:<string>} operator.
959 JH/13 Bug 1708: avoid misaligned access in cached lookup.
961 JH/14 Change header file name for freeradius-client. Relevant if compiling
962 with Radius support; from the Gentoo tree and checked under Fedora.
964 JH/15 Bug 1712: Introduce $prdr_requested flag variable
966 JH/16 Bug 1714: Permit an empty string as expansion result for transport
967 option transport_filter, meaning no filtering.
969 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
971 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
972 defaults to "*" (all hosts). The variable is now available when not built
973 with TLS, default unset, mainly to enable keeping the testsuite sane.
974 If a server certificate is not supplied (via tls_certificate) an error is
975 logged, and clients will find TLS connections fail on startup. Presumably
976 they will retry in-clear.
977 Packagers of Exim are strongly encouraged to create a server certificate
978 at installation time.
980 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
981 with the $config_file variable.
983 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
984 in transport context, after the attempt, and per-recipient. The latter type
985 is per host attempted. The event data is the error message, and the errno
986 information encodes the lookup type (A vs. MX) used for the (first) host,
987 and the trailing two digits of the smtp 4xx response.
989 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
990 to write to mainlog (or rejectlog, paniclog) in the window between file
991 creation and permissions/ownership being changed. Particularly affects
992 installations where exicyclog is run as root, rather than exim user;
993 result is that the running daemon panics and dies.
995 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
997 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
998 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
999 "pri" and "weight". Note that the previous implicit priority given by the
1000 list order is no longer honoured.
1002 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1003 for DKIM processing.
1005 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1006 by defining SUPPORT_SOCKS.
1008 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1009 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1010 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1011 variables are renamed to proxy_{local,external}_{address,port}.
1013 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1014 for a build by defining SUPPORT_I18N
1016 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1017 of the query string, and make ${quote_redis:} do that quoting.
1019 JH/29 Move Events support from Experimental to mainline, enabled by default
1020 and removable for a build by defining DISABLE_EVENT.
1022 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1024 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1025 cached by the daemon.
1027 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1028 by defining LOOKUP_REDIS. The libhiredis library is required.
1030 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1031 keys are given for lookup.
1033 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1034 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1035 only supported when built with TLS support. The PolarSSL SHA routines
1036 are still used when the TLS library is too old for convenient support.
1038 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1039 openssl_options), for security. OpenSSL forces this from version 1.1.0
1040 server-side so match that on older versions.
1042 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1043 allocation for $value could be released as the expansion processing
1044 concluded, but leaving the global pointer active for it.
1046 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1047 and to use the domains and local_parts ACL conditions.
1049 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1050 incorrectly not doubled on cutthrough transmission, hence seen as a
1051 body-termination at the receiving system - resulting in truncated mails.
1052 Commonly the sender saw a TCP-level error, and retransmitted the message
1053 via the normal store-and-forward channel. This could result in duplicates
1054 received - but deduplicating mailstores were liable to retain only the
1055 initial truncated version.
1057 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1059 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1061 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1062 we're in there, support oversigning also; bug 1309.
1064 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1066 HS/04 Add support for keep_environment and add_environment options.
1068 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1069 either intentional arithmetic overflow during PRNG, or testing config-
1072 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1073 delivery resulted in actual delivery. Cancel cutthrough before DATA
1076 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1077 rejects a recipient: pass the reject to the originator.
1079 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1080 Many were false-positives and ignorable, but it's worth fixing the
1083 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1084 for the new environment-manipulation done at startup. Move the routines
1085 from being local to tls.c to being global via the os.c file.
1087 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1088 an extract embedded as result-arg for a map, the first arg for extract
1089 is unavailable so we cannot tell if this is a numbered or keyed
1090 extraction. Accept either.
1096 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1099 JH/02 The smtp transport option "multi_domain" is now expanded.
1101 JH/03 The smtp transport now requests PRDR by default, if the server offers
1104 JH/04 Certificate name checking on server certificates, when exim is a client,
1105 is now done by default. The transport option tls_verify_cert_hostnames
1106 can be used to disable this per-host. The build option
1107 EXPERIMENTAL_CERTNAMES is withdrawn.
1109 JH/05 The value of the tls_verify_certificates smtp transport and main options
1110 default to the word "system" to access the system default CA bundle.
1111 For GnuTLS, only version 3.0.20 or later.
1113 JH/06 Verification of the server certificate for a TLS connection is now tried
1114 (but not required) by default. The verification status is now logged by
1115 default, for both outbound TLS and client-certificate supplying inbound
1118 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1121 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1122 Status Notification (bounce) messages are now MIME format per RFC 3464.
1123 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1124 under the control of the dsn_advertise_hosts option, and routers may
1125 have a dsn_lasthop option.
1127 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1128 default, modifiable by a malware= option. The list separator for
1129 the options can now be changed in the usual way. Bug 68.
1131 JH/10 The smtp_receive_timeout main option is now expanded before use.
1133 JH/11 The incoming_interface log option now also enables logging of the
1134 local interface on delivery outgoing connections.
1136 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1137 if the interface and destination host and port all match.
1139 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1142 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1143 Patch from Andrew Lewis.
1145 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1146 now supports optional time-restrictions, weighting, and priority
1147 modifiers per server. Patch originally by <rommer@active.by>.
1149 JH/16 The spamd_address main option now supports a mixed list of local
1150 and remote servers. Remote servers can be IPv6 addresses, and
1151 specify a port-range.
1153 JH/17 Bug 68: The spamd_address main option now supports an optional
1154 timeout value per server.
1156 JH/18 Bug 1581: Router and transport options headers_add/remove can
1157 now have the list separator specified.
1159 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1162 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1165 JH/21 Support for the A6 type of dns record is withdrawn.
1167 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1168 rather than the verbs used.
1170 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1171 from 255 to 1024 chars.
1173 JH/24 Verification callouts now attempt to use TLS by default.
1175 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1176 are generic router options now. The defaults didn't change.
1178 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1179 Original patch from Alexander Shikoff, worked over by JH.
1181 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1182 files if ZCAT_COMMAND is not executable.
1184 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1186 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1188 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1189 Normally benign, it bites when the pair was led to by a CNAME;
1190 modern usage is to not canonicalize the domain to a CNAME target
1191 (and we were inconsistent anyway for A-only vs AAAA+A).
1193 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1195 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1196 when evaluating $sender_host_dnssec.
1198 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1199 $sender_helo_dnssec variable.
1201 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1203 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1205 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1207 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1208 documented as working, but never had. Support all but $spam_report.
1210 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1211 added for tls authenticator.
1213 HS/03 Add perl_taintmode main config option
1219 TL/01 When running the test suite, the README says that variables such as
1220 no_msglog_check are global and can be placed anywhere in a specific
1221 test's script, however it was observed that placement needed to be near
1222 the beginning for it to behave that way. Changed the runtest perl
1223 script to read through the entire script once to detect and set these
1224 variables, reset to the beginning of the script, and then run through
1225 the script parsing/test process like normal.
1227 TL/02 The BSD's have an arc4random API. One of the functions to induce
1228 adding randomness was arc4random_stir(), but it has been removed in
1229 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1230 function when detected.
1232 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1233 cause callback expansion.
1235 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1236 syntax errors in an expansion can be treated as a string instead of
1237 logging or causing an error, due to the internal use of bool_lax
1238 instead of bool when processing it.
1240 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1241 server certificates when making smtp deliveries.
1243 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1245 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1247 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1249 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1250 Merged patch from Sebastian Wiedenroth.
1252 JH/05 Fix results-pipe from transport process. Several recipients, combined
1253 with certificate use, exposed issues where response data items split
1254 over buffer boundaries were not parsed properly. This eventually
1255 resulted in duplicates being sent. This issue only became common enough
1256 to notice due to the introduction of connection certificate information,
1257 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1259 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1260 size buffer was used, resulting in syntax errors when an expansion
1263 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1264 version 3.3.6 or later.
1266 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1267 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1268 both become "event_action", the variables become $event_name, $event_data
1269 and $event_defer_errno. There is a new variable $verify_mode, usable in
1270 routers, transports and related events. The tls:cert event is now also
1271 raised for inbound connections, if the main configuration event_action
1274 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1275 early OCSP support, but no stapling (appears to be less than 1.0.0).
1277 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1278 server certificate names available under the smtp transport option
1279 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1282 JH/10 Time-related extraction expansions from certificates now use the main
1283 option "timezone" setting for output formatting, and are consistent
1284 between OpenSSL and GnuTLS compilations. Bug 1541.
1286 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1287 encoded parameter in the incoming message. Bug 1558.
1289 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1290 include certificate info, eximon was claiming there were spoolfile
1293 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1295 JH/14 Log delivery-related information more consistently, using the sequence
1296 "H=<name> [<ip>]" wherever possible.
1298 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1299 are problematic for Debian distribution, omit them from the release
1302 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1304 JH/16 Fix string representation of time values on 64bit time_t architectures.
1307 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1308 output list separator was used.
1313 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1314 checkers that were complaining about end of non-void function with no
1317 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1318 This was a regression introduced in 4.83 by another bugfix.
1320 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1322 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1323 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1329 TF/01 Correctly close the server side of TLS when forking for delivery.
1331 When a message was received over SMTP with TLS, Exim failed to clear up
1332 the incoming connection properly after forking off the child process to
1333 deliver the message. In some situations the subsequent outgoing
1334 delivery connection happened to have the same fd number as the incoming
1335 connection previously had. Exim would try to use TLS and fail, logging
1336 a "Bad file descriptor" error.
1338 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1339 utilities have not been installed.
1341 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1342 temporary space as the ACL may create new global variables.
1344 TL/01 LDAP support uses per connection or global context settings, depending
1345 upon the detected version of the libraries at build time.
1347 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1348 to extract and use the src ip:port in logging and expansions as if it
1349 were a direct connection from the outside internet. PPv2 support was
1350 updated based on HAProxy spec change in May 2014.
1352 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1354 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1355 Properly escape header and check for NULL return.
1357 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1360 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1362 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1363 characters in header names, implemented as a verify condition.
1364 Contributed by Michael Fischer v. Mollard.
1366 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1367 results permerror and temperror. Previous values are deprecated but
1368 still accepted. In a future release, err_perm and err_temp will be
1369 completely removed, which will be a backward incompatibility if the
1370 ACL tests for either of these two old results. Patch contributed by
1371 user bes-internal on the mailing list.
1373 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1375 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1376 selectors, in both main and reject logs.
1378 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1381 JH/07 Add malware type "sock" for talking to simple daemon.
1383 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1385 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1386 routers/transports under cutthrough routing.
1388 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1389 numbers. Touch up "bool" conditional to keep the same definition.
1391 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1393 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1395 JH/12 Expand items in router/transport headers_add or headers_remove lists
1396 individually rather than the list as a whole. Bug 1452.
1398 Required for reasonable handling of multiple headers_ options when
1399 they may be empty; requires that headers_remove items with embedded
1400 colons must have them doubled (or the list-separator changed).
1402 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1403 view the policy declared in the DMARC record. Currently, $dmarc_status
1404 is a combined value of both the record presence and the result of the
1407 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1409 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1410 dnslookup router and the smtp transport (applying to the forward
1413 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1414 of ldap servers used for a specific lookup. Patch provided by Heiko
1417 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1418 New variable $lookup_dnssec_authenticated for observability.
1420 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1421 Patch submitted by Lars Timman.
1423 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1425 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1426 Requires trusted mode and valid format message id, aborts otherwise.
1427 Patch contributed by Heiko Schlichting.
1429 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1430 certextract with support for various fields. Bug 1358.
1432 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1433 is requested by default, modifiable by smtp transport option
1436 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1437 operate on certificate variables to give certificate fingerprints
1438 Also new ${sha256:cert_variable}.
1440 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1442 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1443 Christian Aistleitner.
1445 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1447 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1448 file. Patch from Wolfgang Breyha.
1450 JH/25 Expand the coverage of the delivery $host and $host_address to
1451 client authenticators run in verify callout. Bug 1476.
1453 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1454 align with daemon_smtp_ports. Bug 72.
1456 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1457 support and error reporting did not work properly.
1459 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1460 and is readable. Patch from Andrew Colin Kissa.
1462 TL/14 Enhance documentation of ${run expansion and how it parses the
1463 commandline after expansion, particularly in the case when an
1464 unquoted variable expansion results in an empty value.
1466 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1468 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1469 by renaming away from it. Addresses GH issue 15, reported by
1472 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1474 TL/15 SECURITY: prevent double expansion in math comparison functions
1475 (can expand unsanitized data). Not remotely exploitable.
1482 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1484 PP/02 Make -n do something, by making it not do something.
1485 When combined with -bP, the name of an option is not output.
1487 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1490 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1491 $sender_host_name and config options to manage this, and basic check
1494 PP/05 DSCP support for outbound connections and control modifier for inbound.
1496 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1497 (Only plugin which currently uses this is kerberos4, which nobody should
1498 be using, but we should make it available and other future plugins might
1499 conceivably use it, even though it would break NAT; stuff *should* be
1500 using channel bindings instead).
1502 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1503 name; added for Sendmail compatibility; requires admin caller.
1504 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1505 just ignore it); requires trusted caller.
1506 Also parse but ignore: -Ac -Am -X<logfile>
1509 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1511 TL/02 Add +smtp_confirmation as a default logging option.
1513 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1514 Patch by Magnus Holmgren from 2007-02-20.
1516 TL/04 Bugzilla 1281 - Spec typo.
1517 Bugzilla 1283 - Spec typo.
1518 Bugzilla 1290 - Spec grammar fixes.
1520 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1522 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1524 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1525 mailing list by by Dmitry Isaikin.
1527 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1529 JH/02 Support "G" suffix to numbers in ${if comparisons.
1531 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1533 NM/01 Bugzilla 1197 - Spec typo
1534 Bugzilla 1196 - Spec examples corrections
1536 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1538 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1539 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1542 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1543 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1545 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1546 "acl {{name}{arg}...}", and optional args on acl condition
1549 JH/05 Permit multiple router/transport headers_add/remove lines.
1551 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1553 JH/07 Avoid using a waiting database for a single-message-only transport.
1554 Performance patch from Paul Fisher. Bugzilla 1262.
1556 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1559 JH/09 Add $headers_added variable, with content from use of ACL modifier
1560 add_header (but not yet added to the message). Bugzilla 199.
1562 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1563 Pulled from Bugzilla 817 by Wolfgang Breyha.
1565 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1567 (nb: this is the same fix as in Exim 4.80.1)
1569 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1572 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1575 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1577 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1578 advertise SMTP AUTH mechanism to us, instead of a generic
1579 protocol violation error. Also, make Exim more robust to bad
1580 data from the Dovecot auth socket.
1582 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1584 When a queue runner is handling a message, Exim first routes the
1585 recipient addresses, during which it prunes them based on the retry
1586 hints database. After that it attempts to deliver the message to
1587 any remaining recipients. It then updates the hints database using
1590 So if a recipient address works intermittently, it can get repeatedly
1591 deferred at routing time. The retry hints record remains fresh so the
1592 address never reaches the final cutoff time.
1594 This is a fairly common occurrence when a user is bumping up against
1595 their storage quota. Exim had some logic in its local delivery code
1596 to deal with this. However it did not apply to per-recipient defers
1597 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1599 This change adds a proper retry rule check during routing so that the
1600 final cutoff time is checked against the message's age. We only do
1601 this check if there is an address retry record and there is not a
1602 domain retry record; this implies that previous attempts to handle
1603 the address had the retry_use_local_parts option turned on. We use
1604 this as an approximation for the destination being like a local
1605 delivery, as in LMTP.
1607 I suspect this new check makes the old local delivery cutoff check
1608 redundant, but I have not verified this so I left the code in place.
1610 TF/02 Correct gecos expansion when From: is a prefix of the username.
1612 Test 0254 submits a message to Exim with the header
1616 When I ran the test suite under the user fanf2, Exim expanded
1617 the header to contain my full name, whereas it should have added
1618 a Resent-Sender: header. It erroneously treats any prefix of the
1619 username as equal to the username.
1621 This change corrects that bug.
1623 GF/01 DCC debug and logging tidyup
1624 Error conditions log to paniclog rather than rejectlog.
1625 Debug lines prefixed by "DCC: " to remove any ambiguity.
1627 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1629 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1630 Bug spotted by Jeremy Harris; was flawed since initial commit.
1631 Would have resulted in OCSP responses post-SNI triggering an Exim
1632 NULL dereference and crash.
1634 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1636 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1637 Bug detection, analysis and fix by Samuel Thibault.
1638 Bugzilla 1331, Debian bug #698092.
1640 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1642 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1643 Server implementation by Todd Lyons, client by JH.
1644 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1645 config variable "prdr_enable" controls whether the server
1646 advertises the facility. If the client requests PRDR a new
1647 acl_data_smtp_prdr ACL is called once for each recipient, after
1648 the body content is received and before the acl_smtp_data ACL.
1649 The client is controlled by both of: a hosts_try_prdr option
1650 on the smtp transport, and the server advertisement.
1651 Default client logging of deliveries and rejections involving
1652 PRDR are flagged with the string "PRDR".
1654 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1655 fclose(). Diagnosis by Todd Lyons.
1657 PP/17 Update configure.default to handle IPv6 localhost better.
1658 Patch by Alain Williams (plus minor tweaks).
1661 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1662 This is now consistent with GnuTLS, and is now documented: the
1663 previous undocumented portable approach to treating the option as
1664 unset was to force an expansion failure. That still works, and
1665 an empty string is now equivalent.
1667 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1668 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1669 not performing validation itself.
1671 PP/20 Added force_command boolean option to pipe transport.
1672 Patch from Nick Koston, of cPanel Inc.
1674 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1677 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1679 PP/21 Fix eximon continuous updating with timestamped log-files.
1680 Broken in a format-string cleanup in 4.80, missed when I repaired the
1681 other false fix of the same issue.
1682 Report and fix from Heiko Schlichting.
1685 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1686 Report from Prashanth Katuri.
1688 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1689 It's SecureTransport, so affects any MacOS clients which use the
1690 system-integrated TLS libraries, including email clients.
1692 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1693 using a MIME ACL for non-SMTP local injection.
1694 Report and assistance in diagnosis by Warren Baker.
1696 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1698 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1700 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1701 last id that failed so it may be referenced in subsequent ACL's.
1703 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1706 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1707 ldap library initialization, allowing self-signed CA's to be
1708 used. Also properly sets require_cert option later in code by
1709 using NULL (global ldap config) instead of ldap handle (per
1710 session). Bug diagnosis and testing by alxgomz.
1712 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1713 the src/util/ subdirectory.
1715 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1716 renamed to Transport Post Delivery Action by Jeremy Harris, as
1719 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1720 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1721 redis_servers = needs to be configured which will be used by the redis
1722 lookup. Patch from Warren Baker, of The Packet Hub.
1724 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1726 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1727 hostname or reverse DNS when processing a host list. Used suggestions
1728 from multiple comments on this bug.
1730 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1732 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1733 Missed a few lines, added it to make the runtest require no keyboard
1736 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1737 contains upper case chars. Make router use caseful_local_part.
1739 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1740 support when GnuTLS has been built with p11-kit.
1746 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1748 This, or similar/improved, will also be change PP/11 of 4.82.
1754 PP/01 Handle short writes when writing local log-files.
1755 In practice, only affects FreeBSD (8 onwards).
1756 Bugzilla 1053, with thanks to Dmitry Isaikin.
1758 NM/01 Bugzilla 949 - Documentation tweak
1760 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1763 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1765 PP/02 Implemented gsasl authenticator.
1767 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1769 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1770 `pkg-config foo` for cflags/libs.
1772 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1773 with rest of GSASL and with heimdal_gssapi.
1775 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1776 `pkg-config foo` for cflags/libs for the TLS implementation.
1778 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1779 properties get this fed in as external SSF. A number of robustness
1780 and debugging improvements to the cyrus_sasl authenticator.
1782 PP/08 cyrus_sasl server now expands the server_realm option.
1784 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1785 Patch by Jeremy Harris.
1787 PP/10 Added dbmjz lookup type.
1789 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1791 PP/12 MAIL args handles TAB as well as SP, for better interop with
1792 non-compliant senders.
1793 Analysis and variant patch by Todd Lyons.
1795 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1796 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1797 Patch from Dirk Mueller <dmueller@suse.com>
1799 PP/13 tls_peerdn now print-escaped for spool files.
1800 Observed some $tls_peerdn in wild which contained \n, which resulted
1801 in spool file corruption.
1803 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1804 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1805 or write after TLS renegotiation, which otherwise led to messages
1808 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1809 as a tracking header (ie: a signed header comes before the signature).
1810 Patch from Wolfgang Breyha.
1812 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1813 comma-sep list; embedded commas doubled.
1815 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1817 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1819 Report and patch from Dmitry Banschikov.
1821 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1822 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1823 failures. We appear to now support TLS1.1+ with Exim.
1825 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1826 lets Exim select keys and certificates based upon TLS SNI from client.
1827 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1828 before an outbound SMTP session. New log_selector, +tls_sni.
1830 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1831 NULL dereference. Report and patch from Alun Jones.
1833 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1834 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1835 Not seeing resolver debug output on NetBSD, but suspect this is a
1836 resolver implementation change.
1838 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1839 Left warnings. Added "eximon gdb" invocation mode.
1841 PP/21 Defaulting "accept_8bitmime" to true, not false.
1843 PP/22 Added -bw for inetd wait mode support.
1845 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1846 locate the relevant includes and libraries. Made this the default.
1848 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1849 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1851 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1852 This may cause build issues on older platforms.
1854 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1855 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1856 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1857 Added SNI support via GnuTLS too.
1858 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1860 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1862 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1863 Applied second patch from Janne, implementing suggestion to default
1864 multiple-strings-in-record handling to match SPF spec.
1866 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1868 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1869 read-only, out of scope).
1870 Patch from Wolfgang Breyha, report from Stuart Northfield.
1872 PP/29 Fix three issues highlighted by clang analyser static analysis.
1873 Only crash-plausible issue would require the Cambridge-specific
1874 iplookup router and a misconfiguration.
1875 Report from Marcin Mirosław.
1877 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1879 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1880 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1881 As part of this, removing so much warning spew let me fix some minor
1882 real issues in debug logging.
1884 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1885 assignment on my part. Fixed.
1887 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1888 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1889 Janne Snabb (who went above and beyond: thank you).
1891 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1892 string otherwise requires a connection and a bunch more work and it's
1893 relatively easy to get wrong. Should also expose TLS library linkage
1896 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1897 64-bit ${eval} (JH/03).
1899 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1900 GNU libc to support some of the 64-bit stuff, should not lead to
1901 conflicts. Defined before os.h is pulled in, so if a given platform
1902 needs to override this, it can.
1904 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1905 protection layer was required, which is not implemented.
1906 Bugzilla 1254, patch from Wolfgang Breyha.
1908 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1909 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1910 tls_dhparam take prime identifiers. Also unbreak combination of
1911 OpenSSL+DH_params+TLSSNI.
1913 PP/39 Disable SSLv2 by default in OpenSSL support.
1919 PP/01 Solaris build fix for Oracle's LDAP libraries.
1920 Bugzilla 1109, patch from Stephen Usher.
1922 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1924 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1927 TF/02 Fix a couple more cases where we did not log the error message
1928 when unlink() failed. See also change 4.74-TF/03.
1930 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1931 lock up or crash if it happened to be inside a call to libc when it
1932 got a SIGUSR1 from exiwhat.
1934 The SIGUSR1 handler appends the current process status to the process
1935 log which is later printed by exiwhat. It used to use the general
1936 purpose logging code to do this, but several functions it calls are
1937 not safe for signals.
1939 The new output code in the SIGUSR1 handler is specific to the process
1940 log, and simple enough that it's easy to inspect for signal safety.
1941 Removing some special cases also simplifies the general logging code.
1942 Removing the spurious timestamps from the process log simplifies
1945 TF/04 Improved ratelimit ACL condition.
1947 The /noupdate option has been deprecated in favour of /readonly which
1948 has clearer semantics. The /leaky, /strict, and /readonly update modes
1949 are mutually exclusive. The update mode is no longer included in the
1950 database key; it just determines when the database is updated. (This
1951 means that when you upgrade Exim will forget old rate measurements.)
1953 Exim now checks that the per_* options are used with an update mode that
1954 makes sense for the current ACL. For example, when Exim is processing a
1955 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1956 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1957 must specify per_mail/readonly. If you omit the update mode it defaults to
1958 /leaky where that makes sense (as before) or /readonly where required.
1960 The /noupdate option is now undocumented but still supported for
1961 backwards compatibility. It is equivalent to /readonly except that in
1962 ACLs where /readonly is required you may specify /leaky/noupdate or
1963 /strict/noupdate which are treated the same as /readonly.
1965 A useful new feature is the /count= option. This is a generalization
1966 of the per_byte option, so that you can measure the throughput of other
1967 aggregate values. For example, the per_byte option is now equivalent
1968 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1970 The per_rcpt option has been generalized using the /count= mechanism
1971 (though it's more complicated than the per_byte equivalence). When it is
1972 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1973 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1974 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1975 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1976 Note that using per_rcpt with a non-readonly update mode in more than
1977 one ACL will cause the recipients to be double-counted. (The per_mail
1978 and per_byte options don't have this problem.)
1980 The handling of very low rates has changed slightly. If the computed rate
1981 is less than the event's count (usually one) then this event is the first
1982 after a long gap. In this case the rate is set to the same as this event's
1983 count, so that the first message of a spam run is counted properly.
1985 The major new feature is a mechanism for counting the rate of unique
1986 events. The new per_addr option counts the number of different
1987 recipients that someone has sent messages to in the last time period. It
1988 behaves like per_rcpt if all the recipient addresses are different, but
1989 duplicate recipient addresses do not increase the measured rate. Like
1990 the /count= option this is a general mechanism, so the per_addr option
1991 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1992 example, measure the rate that a client uses different sender addresses
1993 with the options per_mail/unique=$sender_address. There are further
1994 details in the main documentation.
1996 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1998 TF/06 Removed a few PCRE remnants.
2000 TF/07 Automatically extract Exim's version number from tags in the git
2001 repository when doing development or release builds.
2003 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2004 Bugzilla 879. Patch from Paul Fisher.
2006 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2007 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2010 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2012 PP/05 Variable $av_failed, true if the AV scanner deferred.
2013 Bugzilla 1078. Patch from John Horne.
2015 PP/06 Stop make process more reliably on build failure.
2016 Bugzilla 1087. Patch from Heiko Schlittermann.
2018 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2019 Bugzilla 1089. Patch from Heiko Schlittermann.
2021 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2022 Bugzilla 1131. Patch from Holger Weiß.
2024 PP/09 Handle IPv6 addresses with SPF.
2025 Bugzilla 860. Patch from Wolfgang Breyha.
2027 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2029 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2032 PP/11 match_* no longer expand right-hand-side by default.
2033 New compile-time build option, EXPAND_LISTMATCH_RHS.
2034 New expansion conditions, "inlist", "inlisti".
2036 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2038 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2040 PP/14 fix log_write() format string regression from TF/03.
2041 Bugzilla 1152. Patch from Dmitry Isaikin.
2047 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2049 PP/02 Harmonised TLS library version reporting; only show if debugging.
2050 Layout now matches that introduced for other libraries in 4.74 PP/03.
2052 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2054 PP/04 New "dns_use_edns0" global option.
2056 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2059 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2060 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2062 TK/01 Updated PolarSSL code to 0.14.2.
2063 Bugzilla 1097. Patch from Andreas Metzler.
2065 PP/07 Catch divide-by-zero in ${eval:...}.
2066 Fixes bugzilla 1102.
2068 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2071 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2072 format-string attack -- SECURITY: remote arbitrary code execution.
2074 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2075 time unintentionally subject to list matching rules, letting the header
2076 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2077 arbitrary string expansion). This allowed for information disclosure.
2079 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2080 INT_MIN/-1 -- value coerced to INT_MAX.
2086 NM/01 Workaround for PCRE version dependency in version reporting
2089 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2090 This fixes portability to compilers other than gcc, notably
2091 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2093 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2094 makefiles for portability to HP-UX and POSIX correctness.
2096 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2097 Also via indented variable definition in the Makefile.
2098 (Debugging by Oliver Heesakkers).
2100 PP/02 Restore caching of spamd results with expanded spamd_address.
2101 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2103 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2104 Improves build reliability. Fix from: Frank Elsner
2106 NM/02 Fix wide character breakage in the rfc2047 coding
2107 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2109 NM/03 Allow underscore in dnslist lookups
2110 Fixes bug 1026. Patch from Graeme Fowler
2112 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2113 Code patches from Adam Ciarcinski of NetBSD.
2115 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2118 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2119 is logged, to avoid truncation. Patch from John Horne.
2121 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2122 Patch from Jakob Hirsch.
2124 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2125 SQL string expansion failure details.
2126 Patch from Andrey Oktyabrski.
2128 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2129 Patch from Simon Arlott.
2131 PP/09 New lookups functionality failed to compile on old gcc which rejects
2132 extern declarations in function scope.
2133 Patch from Oliver Fleischmann
2135 PP/10 Use sig_atomic_t for flags set from signal handlers.
2136 Check getgroups() return and improve debugging.
2137 Fixed developed for diagnosis in bug 927 (which turned out to be
2140 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2141 Patch from Mark Zealey.
2143 PP/12 Bugzilla 1056: Improved spamd server selection.
2144 Patch from Mark Zealey.
2146 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2147 Based on patch from Heiko Schlittermann.
2149 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2150 Patch from Uwe Doering, sign-off by Michael Haardt.
2152 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2153 variable declaration deep within a block. Bug and patch from
2156 PP/15 lookups-Makefile IRIX compatibility coercion.
2158 PP/16 Make DISABLE_DKIM build knob functional.
2160 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2161 Patch by Simon Arlott
2163 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2164 variable argument macros. Our copy now differs from upstream.
2170 TF/01 Failure to get a lock on a hints database can have serious
2171 consequences so log it to the panic log.
2173 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2174 controlled using the smtp_confirmation log selector.
2176 TF/03 Include the error message when we fail to unlink a spool file.
2178 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2179 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2180 for maintaining out-of-tree patches for some time.
2182 PP/01 Bugzilla 139: Documentation and portability issues.
2183 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2184 Handle per-OS dynamic-module compilation flags.
2186 PP/02 Let /dev/null have normal permissions.
2187 The 4.73 fixes were a little too stringent and complained about the
2188 permissions on /dev/null. Exempt it from some checks.
2189 Reported by Andreas M. Kirchwitz.
2191 PP/03 Report version information for many libraries, including
2192 Exim version information for dynamically loaded libraries. Created
2193 version.h, now support a version extension string for distributors
2194 who patch heavily. Dynamic module ABI change.
2196 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2197 privilege escalation vulnerability whereby the Exim run-time user
2198 can cause root to append content of the attacker's choosing to
2201 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2204 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2205 If dropping privileges for untrusted macros, we disabled normal logging
2206 on the basis that it would fail; for the Exim run-time user, this is not
2207 the case, and it resulted in successful deliveries going unlogged.
2208 Fixed. Reported by Andreas Metzler.
2214 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2215 only prepend for the Resent-* case. Fixes regression introduced in
2216 Exim 4.70 by NM/22 for Bugzilla 607.
2218 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2219 increasing numbers of administrators be bitten by this.
2221 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2223 PP/03 Bugzilla 994: added openssl_options main configuration option.
2225 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2227 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2229 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2231 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2232 without a peer certificate, leading to a segfault because of an
2233 assumption that peers always have certificates. Be a little more
2234 paranoid. Problem reported by Martin Tscholak.
2236 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2237 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2238 NB: ClamAV planning to remove STREAM in "middle of 2010".
2239 CL also introduces -bmalware, various -d+acl logging additions and
2240 more caution in buffer sizes.
2242 PP/09 Implemented reverse_ip expansion operator.
2244 PP/10 Bugzilla 937: provide a "debug" ACL control.
2246 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2248 PP/12 Bugzilla 973: Implement --version.
2250 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2252 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2254 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2256 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2257 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2258 ignore trailing whitespace.
2260 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2262 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2265 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2266 Notification from Dr Andrew Aitchison.
2268 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2269 ExtendedDetectionInfo response format.
2270 Notification from John Horne.
2272 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2275 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2276 XSL and documented dependency on system catalogs, with examples of how
2279 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2282 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2283 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2284 configuration file which is writeable by the Exim user or group.
2286 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2287 of configuration files to cover files specified with the -C option if
2288 they are going to be used with root privileges, not just the default
2291 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2292 option (effectively making it always true).
2294 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2295 files to be used while preserving root privileges.
2297 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2298 that rogue child processes cannot use them.
2300 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2301 run-time user, instead of root.
2303 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2304 Exim run-time user without dropping privileges.
2306 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2307 result string, instead of calling string_vformat() twice with the same
2310 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2311 for other users. Others should always drop root privileges if they use
2312 -C on the command line, even for a whitelisted configure file.
2314 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2316 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2322 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2323 $data_path, and $header_path variables; fixed documentation bugs and
2326 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2327 exipick to access non-standard spools, including the "frozen" queue
2330 NM/01 Bugzilla 965: Support mysql stored procedures.
2331 Patch from Alain Williams
2333 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2335 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2336 Patch from Andreas Metzler
2338 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2339 Patch from Kirill Miazine
2341 NM/05 Bugzilla 671: Added umask to procmail example.
2343 JJ/03 installed exipick 20100323.0, fixing doc bug
2345 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2346 directory. Notification and patch from Dan Rosenberg.
2348 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2350 TK/02 Improve log output when DKIM signing operation fails.
2352 MH/01 Treat the transport option dkim_domain as a colon separated
2353 list, not as a single string, and sign the message with each element,
2354 omitting multiple occurences of the same signer.
2356 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2357 Bugzilla 985, 986. Patch by Simon Arlott
2359 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2360 Patch by Simon Arlott
2362 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2363 MBX locking. Notification from Dan Rosenberg.
2369 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2371 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2373 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2375 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2377 NM/04 Bugzilla 915: Flag broken perl installation during build.
2383 TK/01 Added patch by Johannes Berg that expands the main option
2384 "spamd_address" if it starts with a dollar sign.
2386 TK/02 Write list of recipients to X-Envelope-Sender header when building
2387 the mbox-format spool file for content scanning (suggested by Jakob
2390 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2391 (http://www.dcc-servers.net/) support via dccifd. Activated by
2392 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2394 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2395 by Mark Daniel Reidel <mr@df.eu>.
2397 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2398 When building exim an external PCRE library is now needed -
2399 PCRE is a system library on the majority of modern systems.
2400 See entry on PCRE_LIBS in EDITME file.
2402 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2403 conversation. Added nologin parameter to request.
2404 Patch contributed by Kirill Miazine.
2406 TF/01 Do not log submission mode rewrites if they do not change the address.
2408 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2410 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2411 log files in place. Contributed by Roberto Lima.
2413 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2415 TF/03 Bugzilla 615: When checking the local_parts router precondition
2416 after a local_part_suffix or local_part_prefix option, Exim now
2417 does not use the address's named list lookup cache, since this
2418 contains cached lookups for the whole local part.
2420 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2421 Robert Millan. Documentation is in experimental-spec.txt.
2423 TF/04 Bugzilla 668: Fix parallel build (make -j).
2425 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2427 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2428 Patch provided by Jan Srzednicki.
2430 TF/05 Leading white space used to be stripped from $spam_report which
2431 wrecked the formatting. Now it is preserved.
2433 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2434 that they are available at delivery time.
2436 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2438 TF/08 TLS error reporting now respects the incoming_interface and
2439 incoming_port log selectors.
2441 TF/09 Produce a more useful error message if an SMTP transport's hosts
2442 setting expands to an empty string.
2444 NM/06 Bugzilla 744: EXPN did not work under TLS.
2445 Patch provided by Phil Pennock.
2447 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2448 Patch provided by Richard Godbee.
2450 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2451 acl_smtp_notquit, added index entry.
2453 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2454 Patch provided by Eugene Bujak.
2456 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2457 accept(). Patch provided by Maxim Dounin.
2459 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2460 Patch provided by Phil Pennock.
2462 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2464 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2465 Patch provided by Brad "anomie" Jorsch.
2467 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2468 Patch provided by Dean Brooks.
2470 TK/05 Add native DKIM support (does not depend on external libraries).
2472 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2473 Patch provided by Graeme Fowler.
2475 NM/16 Bugzilla 851: Documentation example syntax fix.
2477 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2479 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2482 NM/19 Bugzilla 745: TLS version reporting.
2483 Patch provided by Phil Pennock.
2485 NM/20 Bugzilla 167: bool: condition support.
2486 Patch provided by Phil Pennock.
2488 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2489 clients. Patch provided by Phil Pennock.
2491 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2492 Patch provided by Brad "anomie" Jorsch.
2494 NM/23 Bugzilla 687: Fix misparses in eximstats.
2495 Patch provided by Heiko Schlittermann.
2497 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2498 Patch provided by Heiko Schlittermann.
2500 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2501 plus update to original patch.
2503 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2505 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2506 Patch provided by David Brownlee.
2508 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2510 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2512 NM/30 Bugzilla 888: TLS documentation bugfixes.
2514 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2516 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2517 Unlike the original bugzilla I have changed all shell scripts in src tree.
2519 NM/33 Bugzilla 898: Transport filter timeout fix.
2520 Patch by Todd Rinaldo.
2522 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2523 Patch by Serge Demonchaux.
2525 NM/35 Bugzilla 39: Base64 decode bug fixes.
2526 Patch by Jakob Hirsch.
2528 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2530 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2532 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2534 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2540 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2541 ALT-N's libdkim that I have put here:
2542 http://duncanthrax.net/exim-experimental/
2544 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2545 were called 'true' and it seems that C99 defines that as a reserved
2546 keyword to be used with 'bool' variable types. That means you could
2547 not include C99-style headers which use bools without triggering
2548 build errors in sieve.c.
2550 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2551 as mailq or other aliases. Changed the --help handling significantly
2552 to do whats expected. exim_usage() emits usage/help information.
2554 SC/01 Added the -bylocaldomain option to eximstats.
2556 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2558 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2560 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2566 PH/01 Another patch from the Sieve maintainer.
2568 PH/02 When an IPv6 address is converted to a string for single-key lookup
2569 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2570 dots are used instead of colons so that keys in lsearch files need not
2571 contain colons. This was done some time before quoting was made available
2572 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2573 (notated using the quote facility) so as to distinguish them from IPv4
2574 keys. This meant that lookups for IP addresses in host lists did not work
2575 for iplsearch lookups.
2577 This has been fixed by arranging for IPv6 addresses to be expressed with
2578 colons if the lookup type is iplsearch. This is not incompatible, because
2579 previously such lookups could never work.
2581 The situation is now rather anomalous, since one *can* have colons in
2582 ordinary lsearch keys. However, making the change in all cases is
2583 incompatible and would probably break a number of configurations.
2585 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2588 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2589 conversion specification without a maximum field width, thereby enabling
2590 a rogue spamd server to cause a buffer overflow. While nobody in their
2591 right mind would setup Exim to query an untrusted spamd server, an
2592 attacker that gains access to a server running spamd could potentially
2593 exploit this vulnerability to run arbitrary code as the Exim user.
2595 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2596 $primary_hostname instead of what libspf2 thinks the hosts name is.
2598 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2599 a directory entry by the name of the lookup key. Previously, if a
2600 symlink pointed to a non-existing file or a file in a directory that
2601 Exim lacked permissions to read, a lookup for a key matching that
2602 symlink would fail. Now it is enough that a matching directory entry
2603 exists, symlink or not. (Bugzilla 503.)
2605 PH/03 The body_linecount and body_zerocount variables are now exported in the
2608 PH/04 Added the $dnslist_matched variable.
2610 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2611 This means they are set thereafter only if the connection becomes
2614 PH/06 Added the client_condition to authenticators so that some can be skipped
2615 by clients under certain conditions.
2617 PH/07 The error message for a badly-placed control=no_multiline_responses left
2618 "_responses" off the end of the name.
2620 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2622 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2623 (without spaces) instead of just copying the configuration text.
2625 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2627 PH/11 Added $max_received_linelength.
2629 PH/12 Added +ignore_defer and +include_defer to host lists.
2631 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2632 way in which PCRE > 7.0 is built.
2634 PH/14 Implemented queue_only_load_latch.
2636 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2637 MAIL command. The effect was to mangle the value on 64-bit systems.
2639 PH/16 Another patch from the Sieve maintainer.
2641 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2643 PH/18 If a system quota error occurred while trying to create the file for
2644 a maildir delivery, the message "Mailbox is full" was not appended to the
2645 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2646 only to a quota excession during the actual writing of the file.
2648 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2649 characters?) which causes problems in log lines. The DN values are now
2650 passed through string_printing() before being added to log lines.
2652 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2653 and InterBase are left for another time.)
2655 PH/21 Added message_body_newlines option.
2657 PH/22 Guard against possible overflow in moan_check_errorcopy().
2659 PH/23 POSIX allows open() to be a macro; guard against that.
2661 PH/24 If the recipient of an error message contained an @ in the local part
2662 (suitably quoted, of course), incorrect values were put in $domain and
2663 $local_part during the evaluation of errors_copy.
2669 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2670 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2673 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2674 issue a MAIL command.
2676 PH/02 In an ACL statement such as
2678 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2680 if a client was not listed at all, or was listed with a value other than
2681 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2682 the condition was not true (as it should be), so access was not denied.
2683 The bug was that the ! inversion was incorrectly passed on to the second
2684 item. This has been fixed.
2686 PH/03 Added additional dnslists conditions == and =& which are different from
2687 = and & when the dns lookup returns more than one IP address.
2689 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2690 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2692 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2693 FSYNC, which compiles an option called disable_fsync that allows for
2694 bypassing fsync(). The documentation is heavily laced with warnings.
2696 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2698 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2699 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2700 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2701 including adding "make clean"; (3) Added -fPIC when compiling the test
2702 dynamically loaded module, to get rid of a warning.
2704 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2705 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2706 = 0s. The bug is otherwise harmless.
2708 PH/07 There was a bug in the dovecot authenticator such that the value of
2709 $auth1 could be overwritten, and so not correctly preserved, after a
2710 successful authentication. This usually meant that the value preserved by
2711 the server_setid option was incorrect.
2713 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2715 PH/09 Installed PCRE release 7.0.
2717 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2718 run for batched SMTP input. It is now run at the start of every message
2719 in the batch. While fixing this I discovered that the process information
2720 (output by running exiwhat) was not always getting set for -bs and -bS
2721 input. This is fixed, and it now also says "batched" for BSMTP.
2723 PH/11 Added control=no_pipelining.
2725 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2726 patch, slightly modified), and move the expansion of helo_data till after
2727 the connection is made in the smtp transport (so it can use these
2730 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2732 PH/14 Added log_selector = +pid.
2734 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2736 PH/16 Add ${if forany and ${if forall.
2738 PH/17 Added dsn_from option to vary the From: line in DSNs.
2740 PH/18 Flush SMTP output before performing a callout, unless control =
2741 no_callout_flush is set.
2743 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2744 was true (the default) a successful delivery failed to delete the retry
2745 item, thus causing premature timeout of the address. The bug is now
2748 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2750 PH/21 Long custom messages for fakedefer and fakereject are now split up
2751 into multiline responses in the same way that messages for "deny" and
2752 other ACL rejections are.
2754 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2755 with slight modification.
2757 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2758 draft, changing the syntax and factoring some duplicate code".
2760 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2761 for deliveries of the second and subsequent messages over the same SMTP
2764 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2765 ${reduce, with only minor "tidies".
2767 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2769 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2770 expansion side effects.
2772 PH/27 When a message times out after an over-quota error from an Exim-imposed
2773 quota, the bounce message says "mailbox is full". This message was not
2774 being given when it was a system quota that was exceeded. It now should
2777 MH/03 Made $recipients available in local_scan(). local_scan() already has
2778 better access to the recipient list through recipients_list[], but
2779 $recipients can be useful in postmaster-provided expansion strings.
2781 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2782 in the case of a MAIL command with additional options following the
2783 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2784 were accidentally chopped off.
2786 PH/29 SMTP synchronization checks are implemented when a command is read -
2787 there is a check that no more input is waiting when there shouldn't be
2788 any. However, for some commands, a delay in an ACL can mean that it is
2789 some time before the response is written. In this time, more input might
2790 arrive, invalidly. So now there are extra checks after an ACL has run for
2791 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2792 pipelining has not been advertised.
2794 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2796 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2797 returned in the SMTP response when smtp_return_error_details was false.
2798 This has been fixed.
2800 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2801 instead of the C I/O that was originally supplied, because problems were
2802 reported on Solaris.
2804 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2805 Exim which did not show up earlier: it was assuming that a call to
2806 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2807 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2808 was a macro that became an assignment, so it seemed to work. This has
2809 changed to a proper function call with a void return, hence the compile
2810 error. Exim's code has been fixed.
2812 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2815 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2817 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2819 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2820 because it turns out to be too big or there is a timeout) there is no
2821 "Completed" line in the log. When some messages of this type were
2822 selected by exigrep, they were listed as "not completed". Others were
2823 picked up by some special patterns. I have improved the selection
2824 criteria to be more general.
2826 PH/38 The host_find_failed option in the manualroute router can now be set
2827 to "ignore", to completely ignore a host whose IP address cannot be
2828 found. If all hosts are ignored, the behaviour is controlled by the new
2829 host_all_ignored option.
2831 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2832 homing or because of multiple MX records with /mx) generated more than
2833 one IP address, and the following item turned out to be the local host,
2834 all the secondary addresses of the first item were incorrectly removed
2835 from the list, along with the local host and any following hosts (which
2836 is what is supposed to happen).
2838 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2839 whoever called Exim into the -H file. In the case of the daemon it was
2840 behaving confusingly. When first started, it used values for whoever
2841 started the daemon, but after a SIGHUP it used the Exim user (because it
2842 calls itself on a restart). I have changed the code so that it now always
2845 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2846 message are rejected with the same error (e.g. no authentication or bad
2847 sender address), and a DATA command is nevertheless sent (as can happen
2848 with PIPELINING or a stupid MUA), the error message that was given to the
2849 RCPT commands is included in the rejection of the DATA command. This is
2850 intended to be helpful for MUAs that show only the final error to their
2853 PH/42 Another patch from the Sieve maintainer.
2855 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2856 Eximstats - Fixed some broken HTML links and added missing column headers
2858 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2859 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2861 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2863 PH/43 Yet another patch from the Sieve maintainer.
2865 PH/44 I found a way to check for a TCP/IP connection going away before sending
2866 the response to the final '.' that terminates a message, but only in the
2867 case where the client has not sent further data following the '.'
2868 (unfortunately, this is allowed). However, in many cases there won't be
2869 any further data because there won't be any more messages to send. A call
2870 to select() can be used: if it shows that the input is "ready", there is
2871 either input waiting, or the socket has been closed. An attempt to read
2872 the next input character can distinguish the two cases. Previously, Exim
2873 would have sent an OK response which the client would never have see.
2874 This could lead to message repetition. This fix should cure that, at
2875 least in a lot of common cases.
2877 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2878 advertised in response to EHLO.
2884 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2885 fixed by 4.65/MH/01 (is this a record?) are fixed:
2887 (i) An empty string was always treated as zero by the numeric comparison
2888 operators. This behaviour has been restored.
2890 (ii) It is documented that the numeric comparison operators always treat
2891 their arguments as decimal numbers. This was broken in that numbers
2892 starting with 0 were being interpreted as octal.
2894 While fixing these problems I realized that there was another issue that
2895 hadn't been noticed. Values of message_size_limit (both the global option
2896 and the transport option) were treated as octal if they started with 0.
2897 The documentation was vague. These values are now always treated as
2898 decimal, and I will make that clear in the documentation.
2904 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2905 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2908 MH/01 Don't check that the operands of numeric comparison operators are
2909 integers when their expansion is in "skipping" mode (fixes bug
2910 introduced by 4.64-PH/07).
2912 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2913 child addresses, Exim now panics and dies. Previously, because the count
2914 is held in a short int, deliveries were likely to be lost. As such a
2915 large number of recipients for a single message is ridiculous
2916 (performance will be very, very poor), I have chosen to impose a limit
2917 rather than extend the field.
2923 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2924 leftover -K file (the existence of which was triggered by #402).
2925 While we were at it, introduced process PID as part of the -K
2926 filename. This should rule out race conditions when creating
2929 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2930 processing considerably. Previous code took too long for large mails,
2931 triggering a timeout which in turn triggers #401.
2933 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2934 in the DK code in transports.c. sendfile() is not really portable,
2935 hence the _LINUX specificness.
2937 TF/01 In the add_headers option to the mail command in an Exim filter,
2938 there was a bug that Exim would claim a syntax error in any
2939 header after the first one which had an odd number of characters
2942 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2943 callout verification, Exim cached a "reject" for the entire domain. This
2944 is correct for most verifications, but it is not correct for a recipient
2945 verification with use_sender or use_postmaster set, because in that case
2946 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2947 case of MAIL FROM:<> rejection from other early rejections (e.g.
2948 rejection of HELO). When verifying a recipient using a non-null MAIL
2949 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2950 Whatever the result of the callout, the value of the domain cache is
2951 left unchanged (for any other kind of callout, getting as far as trying
2952 RCPT means that the domain itself is ok).
2954 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2957 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2958 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2959 session, the daemon ignores ECONNECT errors and logs others; it now
2960 ignores EPIPE as well.
2962 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2963 (quoted-printable decoding).
2965 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2966 later the small subsequent patch to fix an introduced bug.
2968 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2970 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2972 PH/08 An error is now given if message_size_limit is specified negative.
2974 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2975 to be given (somewhat) arbitrary names.
2977 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2980 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2981 miscellaneous code fixes
2983 PH/10 Added the log_reject_target ACL modifier to specify where to log
2986 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2987 hostname. This is wrong, because it relates to the incoming message (and
2988 probably the interface on which it is arriving) and not to the outgoing
2989 callout (which could be using a different interface). This has been
2990 changed to use the value of the helo_data option from the smtp transport
2991 instead - this is what is used when a message is actually being sent. If
2992 there is no remote transport (possible with a router that sets up host
2993 addresses), $smtp_active_hostname is used.
2995 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2996 tweaks were necessary in order to get it to work (see also 21 below):
2997 (a) The code assumed that strncpy() returns a negative number on buffer
2998 overflow, which isn't the case. Replaced with Exim's string_format()
3000 (b) There were several signed/unsigned issues. I just did the minimum
3001 hacking in of casts. There is scope for a larger refactoring.
3002 (c) The code used strcasecmp() which is not a standard C function.
3003 Replaced with Exim's strcmpic() function.
3004 (d) The code set only $1; it now sets $auth1 as well.
3005 (e) A simple test gave the error "authentication client didn't specify
3006 service in request". It would seem that Dovecot has changed its
3007 interface. Fortunately there's a specification; I followed it and
3008 changed what the client sends and it appears to be working now.
3010 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3013 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3014 address A is aliased to B and C, where B exists and C does not. Without
3015 -v the output is "A verified" because verification stops after a
3016 successful redirection if more than one address is generated. However,
3017 with -v the child addresses are also verified. Exim was outputting "A
3018 failed to verify" and then showing the successful verification for C,
3019 with its parentage. It now outputs "B failed to verify", showing B's
3020 parentage before showing the successful verification of C.
3022 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3023 look up a TXT record in a specific list after matching in a combined
3026 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3027 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3028 they consult the DNS. I had assumed they would set it the way they
3029 wanted; and indeed my experiments on Linux seem to show that in some
3030 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3031 To be on the safe side, however, I have now made the interface to
3032 host_find_byname() similar to host_find_bydns(), with an argument
3033 containing the DNS resolver options. The host_find_byname() function now
3034 sets these options at its start, just as host_find_bydns() does. The smtp
3035 transport options dns_qualify_single and dns_search_parents are passed to
3036 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3037 of host_find_byname() use the default settings of RES_DEFNAMES
3038 (qualify_single) but not RES_DNSRCH (search_parents).
3040 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3041 spool_read_header() do less string testing, by means of a preliminary
3042 switch on the second character of optional "-foo" lines. (This is
3043 overdue, caused by the large number of possibilities that now exist.
3044 Originally there were few.) While I was there, I also converted the
3045 str(n)cmp tests so they don't re-test the leading "-" and the first
3046 character, in the hope this might squeeze out yet more improvement.
3048 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3049 flag allowing group syntax was set by the header_syntax check but not
3050 turned off, possible causing trouble later; (2) The flag was not being
3051 set at all for the header_verify test, causing "group"-style headers to
3052 be rejected. I have now set it in this case, and also caused header_
3053 verify to ignore an empty address taken from a group. While doing this, I
3054 came across some other cases where the code for allowing group syntax
3055 while scanning a header line wasn't quite right (mostly, not resetting
3056 the flag correctly in the right place). These bugs could have caused
3057 trouble for malformed header lines. I hope it is now all correct.
3059 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3060 with the "reply" argument non-NULL. The code, however (which originally
3061 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3062 but it didn't always do it. This confused somebody who was copying the
3063 code for some other use. I have removed all the tests.
3065 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3066 feature that was used to support insecure browsers during the U.S. crypto
3067 embargo. It requires special client support, and Exim is probably the
3068 only MTA that supported it -- and would never use it because real RSA is
3069 always available. This code has been removed, because it had the bad
3070 effect of slowing Exim down by computing (never used) parameters for the
3071 RSA_EXPORT functionality.
3073 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3074 authenticator to fail if there's a tab character in the incoming data
3075 (there should never be unless someone is messing about, as it's supposed
3076 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3077 if the connection is using TLS or if the remote IP is the same as the
3078 local IP, and the "valid-client-cert option" if a client certificate has
3081 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3082 authenticators. This can be used for authorization after authentication
3083 succeeds. (In the case of plaintext, it servers for both authentication
3086 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3087 if any retry times were supplied.
3089 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3090 connection, where there is no client IP address to check. In this
3091 situation, the verify now always succeeds.
3093 PH/25 Applied John Jetmore's -Mset patch.
3095 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3097 PH/27 In a string expansion for a processed (not raw) header when multiple
3098 headers of the same name were present, leading whitespace was being
3099 removed from all of them, but trailing whitespace was being removed only
3100 from the last one. Now trailing whitespace is removed from each header
3101 before concatenation. Completely empty headers in a concatenation (as
3102 before) are ignored.
3104 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3105 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3107 PH/29 [Removed. This was a change that I later backed out, and forgot to
3108 correct the ChangeLog entry (that I had efficiently created) before
3109 committing the later change.]
3111 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3112 address errors (4xx response to RCPT) over the same connection as other
3113 messages routed to the same hosts. Such deliveries are always "forced",
3114 so retry times are not inspected. This resulted in far too many retries
3115 for the affected addresses. The effect occurred only when there were more
3116 hosts than the hosts_max_try setting in the smtp transport when it had
3117 the 4xx errors. Those hosts that it had tried were not added to the list
3118 of hosts for which the message was waiting, so if all were tried, there
3119 was no problem. Two fixes have been applied:
3121 (i) If there are any address or message errors in an SMTP delivery, none
3122 of the hosts (tried or untried) are now added to the list of hosts
3123 for which the message is waiting, so the message should not be a
3124 candidate for sending over the same connection that was used for a
3125 successful delivery of some other message. This seems entirely
3126 reasonable: after all the message is NOT "waiting for some host".
3127 This is so "obvious" that I'm not sure why it wasn't done
3128 previously. Hope I haven't missed anything, but it can't do any
3129 harm, as the worst effect is to miss an optimization.
3131 (ii) If, despite (i), such a delivery is accidentally attempted, the
3132 routing retry time is respected, so at least it doesn't keep
3133 hammering the server.
3135 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3136 in ${readsocket because some servers need this prod.
3138 PH/32 Added some extra debug output when updating a wait-xxx database.
3140 PH/33 The hint "could be header name not terminated by colon", which has been
3141 given for certain expansion errors for a long time, was not being given
3142 for the ${if def:h_colon_omitted{... case.
3144 PH/34 The spec says: "With one important exception, whenever a domain list is
3145 being scanned, $domain contains the subject domain." There was at least
3146 one case where this was not true.
3148 PH/35 The error "getsockname() failed: connection reset by peer" was being
3149 written to the panic log as well as the main log, but it isn't really
3150 panic-worthy as it just means the connection died rather early on. I have
3151 removed the panic log writing for the ECONNRESET error when getsockname()
3154 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3155 runs only) independently of the message's sender address. This meant
3156 that, if the 4xx error was in fact related to the sender, a different
3157 message to the same recipient with a different sender could confuse
3158 things. In particular, this can happen when sending to a greylisting
3159 server, but other circumstances could also provoke similar problems.
3160 I have changed the default so that the retry time for these errors is now
3161 based a combination of the sender and recipient addresses. This change
3162 can be overridden by setting address_retry_include_sender=false in the
3165 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3166 remote server are returned as part of bounce messages. This was not
3167 happening for LMTP over a pipe (the lmtp transport), but now it is the
3168 same for both kinds of LMTP.
3170 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3171 in header lines that were in fact CNAMEs. This is no longer the case.
3173 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3174 and queue runs started by the daemon processed all messages. This has
3175 been fixed so that -R and -S can now usefully be given with -q<time>.
3177 PH/40 Import PCRE release 6.7 (fixes some bugs).
3179 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3181 PH/42 Give an error if -q is specified more than once.
3183 PH/43 Renamed the variables $interface_address and $interface_port as
3184 $received_ip_address and $received_port, to make it clear that these
3185 values apply to message reception, and not to the outgoing interface when
3186 a message is delivered. (The old names remain recognized, of course.)
3188 PH/44 There was no timeout on the connect() call when using a Unix domain
3189 socket in the ${readsocket expansion. There now is.
3191 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3192 be meaningful with "accept".
3194 SC/01 Eximstats V1.43
3195 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3197 SC/02 Eximstats V1.44
3198 Use a glob alias rather than an array ref in the generated
3199 parser. This improves both readability and performance.
3201 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3202 Collect SpamAssassin and rejection statistics.
3203 Don't display local sender or destination tables unless
3204 there is data to show.
3205 Added average volumes into the top table text output.
3207 SC/04 Eximstats V1.46
3208 Collect data on the number of addresses (recipients)
3209 as well as the number of messages.
3211 SC/05 Eximstats V1.47
3212 Added 'Message too big' to the list of mail rejection
3213 reasons (thanks to Marco Gaiarin).
3215 SC/06 Eximstats V1.48
3216 Mainlog lines which have GMT offsets and are too short to
3217 have a flag are now skipped.
3219 SC/07 Eximstats V1.49 (Alain Williams)
3220 Added the -emptyok flag.
3222 SC/08 Eximstats V1.50
3223 Fixes for obtaining the IP address from reject messages.
3225 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3226 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3227 whitespace changes from 4.64-PH/27
3229 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3232 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3233 are found, allow negative numbers in numeric criteria)
3235 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3237 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3238 to match changes made in 4.64-PH/43
3240 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3242 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3243 "domain" is actually an IP address, and force a failure. This locks out
3244 those revolvers/nameservers that support "A-for-A" lookups, in
3245 contravention of the specifications.
3247 PH/48 When a host name was looked up from an IP address, and the subsequent
3248 forward lookup of the name timed out, the host name was left in
3249 $sender_host_name, contrary to the specification.
3251 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3252 restricted to single-key lookups, Exim was not diagnosing an error if
3253 * or *@ was used with a query-style lookup.
3255 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3257 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3258 long ago, but noone interested enough thought of it. Let's just say that
3259 the "1.1" means that there are some new functions that weren't there at
3260 some point in the past.
3262 PH/51 Error processing for expansion failure of helo_data from an smtp
3263 transport during callout processing was broken.
3265 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3266 tested/used via the -bh/-bhc/-bs options.
3268 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3269 bug, fixed in subsequent PCRE releases).
3271 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3272 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3274 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3280 SC/01 Use a glob alias rather than an array ref in eximstats generated
3281 parser. This improves both readability and performance.
3283 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3284 Don't display local sender or destination tables in eximstats unless
3285 there is data to show.
3286 Added average volumes into the eximstats top table text output.
3288 SC/03 Collect data on the number of addresses (recipients) as well
3289 as the number of messages in eximstats.
3291 TF/01 Correct an error in the documentation for the redirect router. Exim
3292 does (usually) call initgroups() when daemonizing.
3294 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3295 with consistent privilege compared to when running as a daemon.
3297 TF/03 Note in the spec that $authenticated_id is not set for local
3298 submissions from trusted users.
3300 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3301 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3303 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3304 by adding some example configuration directives to the default
3305 configuration file. A little bit of work is required to uncomment the
3306 directives and define how usernames and passwords are checked, but
3307 there is now a framework to start from.
3309 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3310 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3311 without this. I don't know how relevant this is to other LDAP libraries.
3313 PH/02 Add the verb name to the "unknown ACL verb" error.
3315 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3317 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3319 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3320 directory not expanded when it should be if an expanded home directory
3321 was set for the address (which is overridden by the transport).
3323 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3326 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3327 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3328 because it is too late at that time, and has no effect.
3330 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3331 security issue with \' (bugzilla #107). I could not use the
3332 PQescapeStringConn() function, because it needs a PGconn value as one of
3335 PH/08 When testing addresses using -bt, indicate those final addresses that
3336 are duplicates that would not cause an additional delivery. At least one
3337 person was confused, thinking that -bt output corresponded to deliveries.
3338 (Suppressing duplicates isn't a good idea as you lose the information
3339 about possibly different redirections that led to the duplicates.)
3341 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3342 systems where poll() doesn't work, in particular OS X.
3344 PH/10 Added more information to debugging output for retry time not reached.
3346 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3347 operations in malware.c.
3349 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3352 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3353 syslog_duplication set false, log lines that would normally be written
3354 both the the main log and to the reject log were not written to syslog at
3357 PH/14 In the default configuration, change the use of "message" in ACL warn
3358 statements to "add_header".
3360 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3361 not followed by a command (e.g. "seen endif").
3363 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3364 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3367 PH/17 Added extra conditions to the default value of delay_warning_condition
3371 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3372 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3373 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3376 The Auto-Submitted: and various List- headers are standardised, whereas I
3377 don't think Precedence: ever was.
3379 PH/18 Refactored debugging code in route_finduser() to show more information,
3380 in particular, the error code if getpwnam() issues one.
3382 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3383 This is apparently needed in addition to the PH/07 change above to avoid
3384 any possible encoding problems.
3386 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3387 but not after initializing Perl.
3389 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3390 output them only if debugging. By default they are written stderr,
3391 apparently, which is not desirable.
3393 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3396 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3399 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3401 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3402 authenticated or an ident call has been made. Suppress the default
3403 values for $authenticated_id and $authenticated_sender (but permit -oMai
3404 and -oMas) when testing with -bh.
3406 PH/24 Re-jigged the order of the tests in the default configuration so that the
3407 tests for valid domains and recipients precede the DNS black list and CSA
3408 tests, on the grounds that those ones are more expensive.
3410 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3411 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3412 This bug exists in every version of Exim that I still have, right back to
3415 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3416 However, an attempt to turn on case-sensitivity in a regex key by
3417 including (?-i) didn't work because the subject string was already
3418 lowercased, and the effects were non-intuitive. It turns out that a
3419 one-line patch can be used to allow (?-i) to work as expected.
3425 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3426 other effects) broke the use of negated acl sub-conditions.
3428 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3431 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3432 "Deny" causes Exim to reject the incoming connection with a 554 error.
3433 Unfortunately, if there is a major crisis, such as a disk failure,
3434 tcp-wrappers gives "deny", whereas what one would like would be some
3435 kind of temporary error. A kludge has been added to help with this.
3436 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3437 554 error is used if errno is still zero or contains ENOENT (which occurs
3438 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3441 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3443 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3444 errors. Otherwise a message that provokes a temporary error (when other
3445 messages do not) can cause a whole host to time out.
3447 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3448 addresses were routed directly to files or pipes from a redirect router.
3449 File deliveries just didn't batch; pipe deliveries might have suffered
3452 PH/06 A failure to get a lock for a hints database would erroneously always say
3453 "Failed to get write lock", even when it was really a read lock.
3455 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3456 of 0600. This has been changed to use the value of the lockfile_mode
3457 option (which defaults to 0600).
3459 PH/08 Applied small patch from the Sieve maintainer.
3461 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3462 folder from quota calculations, a direct delivery into this folder messed
3463 up the contents of the maildirsize file. This was because the regex was
3464 used only to exclude .Trash (or whatever) when the size of the mailbox
3465 was calculated. There was no check that a delivery was happening into an
3466 excluded directory. This bug has been fixed by ignoring all quota
3467 processing for deliveries into excluded directories.
3469 PH/10 Added the maildirfolder_create_regex option to appendfile.
3475 PH/01 The code for finding all the local interface addresses on a FreeBSD
3476 system running IPv6 was broken. This may well have applied to all BSD
3477 systems, as well as to others that have similar system calls. The broken
3478 code found IPv4 interfaces correctly, but gave incorrect values for the
3479 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3480 that it would not match correctly against @[] and not recognize the IPv6
3483 PH/02 The ipliteral router was not recognizing addresses of the form user@
3484 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3486 PH/03 Added disable_ipv6.
3488 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3489 decoded form, because it is most often used to construct To: headers
3490 lines in autoreplies, and the decoded form may well be syntactically
3491 invalid. However, $reply_address has leading white space removed, and all
3492 newlines turned into spaces so that the autoreply transport does not
3495 PH/05 If group was specified without a user on a router, and no group or user
3496 was specified on a transport, the group from the router was ignored.
3498 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3499 for visible compile-time settings that can be used to change these
3500 numbers, for those that want even more. Backwards compatibility with old
3501 spool files has been maintained. However, going back to a previous Exim
3502 release will lost any variables that are in spool files.
3504 PH/07 Two small changes when running in the test harness: increase delay when
3505 passing a TCP/IP connection to a new process, in case the original
3506 process has to generate a bounce, and remove special handling of
3507 127.0.0.2 (sic), which is no longer necessary.
3509 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3510 be the same on different OS.
3512 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3515 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3516 whether --show-vars was specified or not
3518 JJ/02 exipick: Added support for new ACL variable spool format introduced
3521 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3522 syntactically invalid From: or Reply-to: line, and a filter used this to
3523 generate an autoreply, and therefore failed to obtain an address for the
3524 autoreply, Exim could try to deliver to a non-existent relative file
3525 name, causing unrelated and misleading errors. What now happens is that
3526 it logs this as a hard delivery error, but does not attempt to create a
3529 PH/11 The exinext utility has a -C option for testing purposes, but although
3530 the given file was scanned by exinext itself; it wasn't being passed on
3531 when Exim was called.
3533 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3534 an end-of-file indication when reading a command response.
3536 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3537 compiled. In many other places in Exim, IPv6 addresses are always
3538 recognized, so I have changed this. It also means that IPv4 domain
3539 literals of the form [IPV4:n.n.n.n] are now always recognized.
3541 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3542 used if the router is not running as root, for example, when verifying at
3543 ACL time, or when using -bh. The debugging output from this situation was
3544 non-existent - all you got was a failure to exec. I have made two
3547 (a) Failures to set uid/gid, the current directory, or a process leader
3548 in a subprocess such as that created by queryprogram now generate
3549 suitable debugging output when -d is set.
3551 (b) The queryprogram router detects when it is not running as root,
3552 outputs suitable debugging information if -d is set, and then runs
3553 the subprocess without attempting to change uid/gid.
3555 PH/15 Minor change to Makefile for building test_host (undocumented testing
3558 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3559 additional section of a DNS packet that returns MX or SRV records.
3560 Instead, it always explicitly searches for A/AAAA records. This avoids
3561 major problems that occur when a DNS server includes only records of one
3562 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3563 fixed another bug: if SRV records were looked up and the corresponding
3564 address records were *not* found in the additional section, the port
3565 values from the SRV records were lost.
3567 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3568 using the correct key (the original address) when searching the retry
3569 rules in order to find which one to use for generating the retry hint.
3571 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3572 adding the default one. Similarly, if it contains a Reply-To: header, the
3573 errors_reply_to option, if set, is not used.
3575 PH/19 When calculating a retry time, Exim used to measure the "time since
3576 failure" by looking at the "first failed" field in the retry record. Now
3577 it does not use this if it is later than than the arrival time of the
3578 message. Instead it uses the arrival time. This makes for better
3579 behaviour in cases where some deliveries succeed, thus re-setting the
3580 "first failed" field. An example is a quota failure for a huge message
3581 when small messages continue to be delivered. Without this change, the
3582 "time since failure" will always be short, possible causing more frequent
3583 delivery attempts for the huge message than are intended.
3584 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3586 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3587 $1, $2, $3) because the numerical variables can be reset during some
3588 expansion items (e.g. "match"), thereby losing the authentication data.
3590 PH/21 Make -bV show the size of off_t variables so that the test suite can
3591 decide whether to run tests for quotas > 2G.
3593 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3594 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3595 filecount value is greater than 2G or if a quota value is greater than 2G
3596 on a system where the size of off_t is not greater than 4, a panic error
3599 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3600 never match. The debug and -bh output now contains an explicit error
3601 message indicating a malformed IPv4 address or mask.
3603 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3604 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3605 PH/23 above applies.
3607 PH/25 Do not write to syslog when running in the test harness. The only
3608 occasion when this arises is a failure to open the main or panic logs
3609 (for which there is an explicit test).
3611 PH/26 Added the /no_tell option to "control=freeze".
3613 PH/27 If a host name lookup failed very early in a connection, for example, if
3614 the IP address matched host_lookup and the reverse lookup yielded a name
3615 that did not have a forward lookup, an error message of the form "no IP
3616 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3617 could be logged. Now it outputs the IP address instead of "NULL".
3619 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3620 allows the sender and the authenticated sender to be set when
3621 submitting a message from within Exim. Since child_open_exim() is
3622 documented for local_scan(), the new function should be too.
3624 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3625 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3626 results in an empty string is now treated as unset.
3628 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3630 PH/31 Added sender_verify_fail logging option.
3632 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3633 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3634 tidied the source and removed it altogether.
3636 PH/33 When a queue run was abandoned because the load average was too high, a
3637 log line was always written; now it is written only if the queue_run log
3638 selector is set. In addition, the log line for abandonment now contains
3639 information about the queue run such as the pid. This is always present
3640 in "start" and "stop" lines but was omitted from the "abandon" line.
3642 PH/34 Omit spaces between a header name and the colon in the error message that
3643 is given when verify = headers_syntax fails (if there are lots of them,
3644 the message gets confusing).
3646 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3647 names, as there are now some PTR records that contain slashes. This check
3648 is only to protect against broken name servers that fall over on strange
3649 characters, so the fact that it applies to all lookups doesn't matter.
3651 PH/36 Now that the new test suite is complete, we can remove some of the
3652 special code in Exim that was needed for the old test suite. For example,
3653 sorting DNS records because real resolvers return them in an arbitrary
3654 order. The new test suite's fake resolver always returns records in the
3657 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3658 bounces) except when queue_only is set, to avoid logging races between
3659 the different processes.
3661 PH/38 Panic-die if .include specifies a non-absolute path.
3663 PH/39 A tweak to the "H" retry rule from its user.
3665 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3666 a label. They prevented compilation on older perls.
3668 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3669 a warning to be raised on newish perls.
3671 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3672 on queue. Changes to match documented behaviour of showing count of
3673 messages matching specified criteria.
3675 PH/40 Changed the default ident timeout from 30s to 5s.
3677 PH/41 Added support for the use of login_cap features, on those BSD systems
3678 that have them, for controlling the resources used by pipe deliveries.
3680 PH/42 The content-scanning code uses fopen() to create files in which to put
3681 message data. Previously it was not paying any attention to the mode of
3682 the files. Exim runs with umask(0) because the rest of the code creates
3683 files with open(), and sets the required mode explicitly. Thus, these
3684 files were ending up world-writeable. This was not a big issue, because,
3685 being within the spool directory, they were not world-accessible. I have
3686 created a function called modefopen, which takes an additional mode
3687 argument. It sets umask(777), creates the file, chmods it to the required
3688 mode, then resets the umask. All the relevant calls to fopen() in the
3689 content scanning code have been changed to use this function.
3691 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3692 to 24 hours. This avoids potential overflow problems when processing G
3693 and H retry rules. I suspect nobody ever tinkers with this value.
3695 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3697 PH/45 When the plaintext authenticator is running as a client, the server's
3698 challenges are checked to ensure they are valid base64 strings. By
3699 default, the authentication attempt is cancelled if an invalid string is
3700 received. Setting client_ignore_invalid_base64 true ignores these errors.
3701 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3702 they are received. Thus, the responses can be made to depend on the
3703 challenges. If an invalid string is ignored, an empty string is placed in
3706 PH/46 Messages that are created by the autoreply transport now contains a
3707 References: header, in accordance with RFCs 2822 and 3834.
3709 PH/47 Added authenticated_sender_force to the smtp transport.
3711 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3713 PH/49 Installed latest patch from the Sieve maintainer.
3715 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3716 was also set, the appendfile transport was unnecessarily scanning a
3717 directory of message files (e.g. for maildir delivery) to find the count
3718 of files (along with the size), even though it did not need this
3719 information. It now does the scan only if it needs to find either the
3720 size of the count of files.
3722 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3724 PH/52 Two bugs concerned with error handling when the smtp transport is
3727 (i) Exim was not creating retry information for temporary errors given
3728 for individual recipients after the DATA command when the smtp transport
3729 was used in LMTP mode. This meant that they could be retried too
3730 frequently, and not timed out correctly.
3732 (ii) Exim was setting the flag that allows error details to be returned
3733 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3734 recipients that were returned after the DATA command.
3736 PH/53 This is related to PH/52, but is more general: for any failing address,
3737 when detailed error information was permitted to be returned to the
3738 sender, but the error was temporary, then after the final timeout, only
3739 "retry timeout exceeded" was returned. Now it returns the full error as
3740 well as "retry timeout exceeded".
3742 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3743 do this, and (what is worse) MTAs that accept it.
3745 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3746 will now be deprecated.
3748 PH/56 New os.c-cygwin from the Cygwin maintainer.
3750 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3751 formats (previously only available in exim formats via -bpr, -bpru,
3752 and -bpra. Now also available in native and exiqgrep formats)
3754 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3755 with very large, slow to parse queues
3757 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3759 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3761 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3762 responses to authentication challenges, though it was showing the
3763 challenges; (ii) I've removed the CR characters from the debug output for
3766 PH/58 Allow for the insertion of a newline as well as a space when a string
3767 is turned into more than one encoded-word during RFC 2047 encoding. The
3768 Sieve code now uses this.
3770 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3771 data_4xx, lost_connection, tls_required.
3773 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3774 message was being sent as an SMTP response.
3776 PH/61 Add -l and -k options to exicyclog.
3778 PH/62 When verifying, if an address was redirected to one new address, so that
3779 verification continued, and the new address failed or deferred after
3780 having set something in $address_data, the value of $address_data was not
3781 passed back to the ACL. This was different to the case when no
3782 redirection occurred. The value is now passed back in both cases.
3784 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3785 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3786 use login_cap.h, so on its own it isn't the distinguishing feature. The
3787 new name refers directly to the setclassresources() function.
3789 PH/65 Added configuration files for NetBSD3.
3791 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3793 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3794 is preferred over IPv4.
3796 PH/68 The bounce_return_message and bounce_return_body options were not being
3797 honoured for bounces generated during the reception of non-SMTP messages.
3798 In particular, this applied to messages rejected by the ACL. This bug has
3799 been fixed. However, if bounce_return_message is true and bounce_return_
3800 body is false, the headers that are returned for a non-SMTP message
3801 include only those that have been read before the error was detected.
3802 (In the case of an ACL rejection, they have all been read.)
3804 PH/69 The HTML version of the specification is now built in a directory called
3805 spec_html instead of spec.html, because the latter looks like a path with
3806 a MIME-type, and this confuses some software.
3808 PH/70 Catch two compiler warnings in sieve.c.
3810 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3811 function verify_get_ident() calls ip_connect() to connect a socket, but
3812 if the "connect()" function timed out, ip_connect() used to close the
3813 socket. However, verify_get_ident() also closes the socket later, and in
3814 between Exim writes to the log, which may get opened at this point. When
3815 the socket was closed in ip_connect(), the log could get the same file
3816 descriptor number as the socket. This naturally causes chaos. The fix is
3817 not to close the socket in ip_connect(); the socket should be closed by
3818 the function that creates it. There was only one place in the code where
3819 this was missing, in the iplookup router, which I don't think anybody now
3820 uses, but I've fixed it anyway.
3822 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3823 well as to direct DNS lookups. Otherwise the handling of names in host
3824 lists is inconsistent and therefore confusing.
3830 PH/01 Two changes to the default runtime configuration:
3832 (1) Move the checks for relay_from_hosts and authenticated clients from
3833 after to before the (commented out) DNS black list checks.
3835 (2) Add control=submission to the relay_from_hosts and authenticated
3836 clients checks, on the grounds that messages accepted by these
3837 statements are most likely to be submissions.
3839 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3841 (1) Generate an error if the third argument for the ${prvs expansion is
3844 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3847 (3) Reset the variables that are obtained from the first argument of
3848 ${prvscheck and used in the second argument before leaving the code,
3849 because their memory is reclaimed, so using them afterwards may do
3852 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3853 one (it's much easier than Tom thought :-).
3855 (5) Because of (4), we can now allow for the use of $prvscheck_result
3856 inside the third argument.
3858 PH/03 For some reason, the default setting of PATH when running a command from
3859 a pipe transport was just "/usr/bin". I have changed it to
3862 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3863 anything to be listed in the output from -bV.
3865 PH/05 When a filter generated an autoreply, the entire To: header line was
3866 quoted in the delivery log line, like this:
3868 => >A.N.Other <ano@some.domain> <original@ddress> ...
3870 This has been changed so that it extracts the operative address. There
3871 may be more than one such address. If so, they are comma-separated, like
3874 => >ano@some.domain,ona@other.domain <original@ddress> ...
3876 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3877 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3878 not being looked up in the rDNS to get a host name, Exim was showing the
3879 IP address twice in Received: lines, even though the IP addresses were
3880 identical. For example:
3882 Received: from [1.2.3.4] (helo=[1.2.3.4])
3884 However, if the real host name was known, it was omitting the HELO data
3885 if it matched the actual IP address. This has been tidied up so that it
3886 doesn't show the same IP address twice.
3888 PH/07 When both +timestamp and +memory debugging was on, the value given by
3889 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3890 called by the debug printing, thereby overwriting the timestamp buffer.
3891 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3893 PH/08 When the original message was included in an autoreply transport, it
3894 always said "this is a copy of the message, including all the headers",
3895 even if body_only or headers_only was set. It now gives an appropriate
3898 PH/09 Applied a patch from the Sieve maintainer which:
3900 o fixes some comments
3901 o adds the (disabled) notify extension core
3902 o adds some debug output for the result of if/elsif tests
3903 o points to the current vacation draft in the documentation
3904 and documents the missing references header update
3908 o fixes a bug in processing the envelope test (when testing
3909 multiple envelope elements, the last element determined the
3912 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3913 Electronic Mail") by including:
3915 Auto-submitted: auto-generated
3917 in the messages that it generates (bounce messages and others, such as
3918 warnings). In the case of bounce messages for non-SMTP messages, there was
3919 also a typo: it was using "Auto_submitted" (underscore instead of
3920 hyphen). Since every message generated by Exim is necessarily in response
3921 to another message, thes have all been changed to:
3923 Auto-Submitted: auto-replied
3925 in accordance with these statements in the RFC:
3927 The auto-replied keyword:
3929 - SHOULD be used on messages sent in direct response to another
3930 message by an automatic process,
3932 - MUST NOT be used on manually-generated messages,
3934 - MAY be used on Delivery Status Notifications (DSNs) and Message
3935 Disposition Notifications (MDNs),
3937 - MUST NOT be used on messages generated by automatic or periodic
3938 processes, except for messages which are automatic responses to
3941 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3942 to the default Received: header definition.
3944 PH/12 Added log selector acl_warn_skipped (default on).
3946 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3947 variables because (a) they are in the wrong storage pool and (b) even if
3948 they were copied, it wouldn't work properly because of the caching.
3950 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3951 checking when decoding. Apparently there are clients that generate
3952 overlong encoded strings. Why am I not surprised?
3954 PH/15 If the first argument of "${if match_address" was not empty, but did not
3955 contain an "@" character, Exim crashed. Now it writes a panic log message
3956 and treats the condition as false.
3958 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3960 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3961 extension "envelope-auth". The code is finished and in agreement with
3962 other implementations, but there is no documentation so far and in fact,
3963 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3964 not changing the active code.
3966 Print executed "if" and "elsif" statements when debugging is used. This
3967 helps a great deal to understand what a filter does.
3969 Document more things not specified clearly in RFC3028. I had all this
3970 sorted out, when out of a sudden new issues came to my mind. Oops."
3972 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3975 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3976 canonical form (as documented). However, after a host name lookup from
3977 the IP address, check_host() was doing a simple string comparison with
3978 addresses acquired from the DNS when checking that the found name did
3979 have the original IP as one of its addresses. Since any found IPv6
3980 addresses are likely to be in abbreviated form, the comparison could
3981 fail. Luckily, there already exists a function for doing the comparison
3982 by converting both addresses to binary, so now that is used instead of
3983 the text comparison.
3985 PH/20 There was another similar case to PH/19, when a complete host name was
3986 given in a host list; looking up its IP address could give an abbreviated
3987 form, whereas the current host's name might or might not be abbreviated.
3988 The same fix has been applied.
3994 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3995 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3998 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3999 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4001 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4003 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4004 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4005 Also, for "Auto-Submitted", treat anything other than "no" as
4006 non-personal, in accordance with RFC 3834. (Previously it treated
4007 anything starting "auto-" as non-personal.)
4009 TF/01 The control=submission/name=... option had a problem with syntax
4010 errors if the name included a slash character. The /name= option
4011 now slurps the rest of the string, so it can include any characters
4012 but it must come last in the list of options (after /sender_retain
4015 PH/05 Some modifications to the interface to the fake nameserver for the new
4023 TK/01 Added the "success_on_redirect" address verification option. See
4024 NewStuff for rationale and an example.
4026 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4028 PH/02 Patch to exigrep to allow it to work on syslog lines.
4030 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4031 fread() to skip over the body file's header line, because in Cygwin the
4032 header line is locked and is inaccessible.
4034 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4035 co-exist for some time) to make it clear that it is the Exim ID that is
4036 referenced, not the Message-ID: header line.
4038 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4039 string_format() function, because snprintf() does not exist on all
4042 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4043 ${stat: expansion item.
4045 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4046 protocol synchronization error", to keep the pedants happy.
4048 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4049 well as for IRIX systems, when gcc is being used. See the host.c source
4052 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4054 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4057 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4058 transport and to the smtp transport in LMTP mode.
4060 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4062 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4063 run a filter in a subprocess. This could lead to confusion in subsequent
4064 lookups in the parent process. There should also be a search_tidyup() at
4065 the end of the subprocess.
4067 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4068 only if the host matched helo_try_verify_hosts, which caused the
4069 verification to occur when the EHLO/HELO command was issued. The ACL just
4070 tested the remembered result. Now, if a previous verification attempt has
4071 not happened, "verify = helo" does it there and then.
4073 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4075 TK/03 Fix log output including CR from clamd.
4077 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4078 exist provoked a memory error which could cause a segfault.
4080 PH/15 Installed PCRE 6.2
4082 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4084 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4085 of the problem. Specifically, suggested +O2 rather than +O1 for the
4088 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4090 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4091 record, the port was not correctly logged when the outgoing_port log
4092 selector was set (it logged the transort's default port).
4094 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4095 fallback_hosts, and "hosts" in the smtp transport.
4097 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4098 host errors such as "Connection refused".
4100 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4101 authentication with radiusclient 0.4.9:
4103 - Error returned from rc_read_config was caught wrongly
4104 - Username/password not passed on to radius server due to wrong length.
4106 The presumption is that some radiusclient API changes for 4.51/PH/17
4107 were not taken care of correctly. The code is still untested by me (my
4108 Linux distribution still has 0.3.2 of radiusclient), but it was
4109 contributed by a Radius user.
4111 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4112 expanding the "port" option of the smtp transport.
4114 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4115 while reading a MIME header. Thanks to Tom Hughes for a patch.
4117 PH/24 Include config.h inside local_scan.h so that configuration settings are
4120 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4121 that in an ACL for RCPT (for example), you can examine exactly what was
4124 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4125 commands, but it was not correctly comparing the address with the actual
4126 client host address. Thus, it would show the EHLO address in Received:
4127 header lines when this was not necessary.
4129 PH/27 Added the % operator to ${eval:}.
4131 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4132 it should be ignoring failures (because with -C, for example, it has lost
4133 privilege). It wasn't ignoring creation failures other than "already
4136 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4139 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4140 because an input line was too long, either on its own, or by virtue of
4141 too many continuations, the temporary file was not being removed, and the
4142 return code was incorrect.
4144 PH/31 Missing "BOOL" in function definition in filtertest.c.
4146 PH/32 Applied Sieve patches from the maintainer.
4148 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4150 PH/33 Added "verify = not_blind".
4152 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4153 Local/Makefile (with some defaults set). These are used in built scripts
4154 such as exicyclog, but they have never been used in the exim_install
4155 script (though there are many overriding facilities there). I have
4156 arranged that the exim_install script now takes note of these two
4159 PH/35 Installed configuration files for Dragonfly.
4161 PH/36 When a locally submitted message by a trusted user did not contain a
4162 From: header, and the sender address was obtained from -f or from an SMTP
4163 MAIL command, and the trusted user did not use -F to supply a sender
4164 name, $originator_name was incorrectly used when constructing a From:
4165 header. Furthermore, $originator_name was used for submission mode
4166 messages from external hosts without From: headers in a similar way,
4167 which is clearly wrong.
4169 PH/37 Added control=suppress_local_fixups.
4171 PH/38 When log_selector = +received_sender was set, and the addition of the
4172 sender made the log line's construction buffer exactly full, or one byte
4173 less than full, an overflow happened when the terminating "\n" was
4176 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4177 when the result of a list match is failure because a DNS lookup failed.
4179 PH/40 RM_COMMAND is now used in the building process.
4181 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4182 the "build-* directories that it finds.
4184 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4185 address in a domain literal was a prefix of an interface address.
4187 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4188 when verifying a sender address, unless rewrite_headers is false.
4190 PH/44 Wrote a long comment about why errors_to addresses are verified as
4191 recipients, not senders.
4193 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4194 the ratelimit ACL was added.
4196 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4198 PH/46 Added extra information about PostgreSQL errors to the error string.
4200 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4201 avoiding the need to install special zones in a real server. This is
4202 backwards compatible; if it can't find the fake resolver, it drops back.
4203 Thus, both old and new test suites can be run.
4205 TF/02 Added util/ratelimit.pl
4207 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4208 clock is set back in time.
4210 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4211 Candler <B.Candler@pobox.com>.
4213 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4214 OK for addresses that are the result of redirections.
4216 PH/48 A number of further additions for the benefit of the new test suite,
4217 including a fake gethostbyname() that interfaces to the fake DNS resolver
4220 TF/06 The fix for widen_domains has also been applied to qualify_single and
4221 search_parents which are the other dnslookup options that can cause
4224 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4227 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4229 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4230 service" if it encountered an MX record with an empty target hostname.
4231 The message is now "an MX or SRV record indicated no SMTP service".
4233 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4234 if the DNS of the sending site is misconfigured. This is quite a
4235 common situation. This change restores the behaviour of treating a
4236 helo verification defer as a failure.
4238 PH/51 If self=fail was set on a router, the bounce message did not include the
4239 actual error message.
4245 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4247 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4248 command itself ended in error, the underlying message about the transport
4249 filter timeout was being overwritten with the pipe command error. Now the
4250 underlying error message should be appended to the second error message.
4252 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4254 PH/02 Reduce the amount of output that "make" produces by default. Full output
4255 can still be requested.
4257 PH/03 The warning log line about a condition test deferring for a "warn" verb
4258 was being output only once per connection, rather than after each
4259 occurrence (because it was using the same function as for successful
4260 "warn" verbs). This seems wrong, so I have changed it.
4262 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4263 it should not have, which might have caused a crash in the right
4264 circumstances, but probably never did.
4266 PH/04 Installed a modified version of Tony Finch's patch to make submission
4267 mode fix the return path as well as the Sender: header line, and to
4268 add a /name= option so that you can make the user's friendly name appear
4271 TF/03 Added the control = fakedefer ACL modifier.
4273 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4274 Mark Lowes for thorough testing.
4276 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4278 TK/03 Merged latest SRS patch from Miles Wilton.
4280 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4281 with the definition in sysexits.h (which is #included earlier).
4282 Fortunately, Exim does not actually use EX_OK. The code used to try to
4283 preserve the sysexits.h value, by assuming that macro definitions were
4284 scanned for macro replacements. I have been disabused of this notion,
4285 so now the code just undefines EX_OK before #including unistd.h.
4287 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4288 in the smtp transport. When a block could not be written in a single
4289 write() function, the timeout was being re-applied to each part-write.
4290 This seems wrong - if the receiver was accepting one byte at a time it
4291 would take for ever. The timeout is now adjusted when this happens. It
4292 doesn't have to be particularly precise.
4294 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4295 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4297 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4298 without a domain if the check to <postmaster@domain> fails.
4300 SC/01 Eximstats: added -xls and the ability to specify output files
4301 (patch written by Frank Heydlauf).
4303 SC/02 Eximstats: use FileHandles for outputting results.
4305 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4307 SC/04 Eximstats: fixed display of large numbers with -nvr option
4309 SC/05 Eximstats: fixed merging of reports with empty tables.
4311 SC/06 Eximstats: added the -include_original_destination flag
4313 SC/07 Eximstats: removed tabs and trailing whitespace.
4315 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4317 TK/06 MBOX spool code: Add real "From " MBOX separator line
4318 so the .eml file is really in mbox format (even though
4319 most programs do not really care). Patch from Alex Miller.
4321 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4322 The latter is generated from $received_to and is only set if the
4323 message has one envelope recipient. SA can use these headers,
4324 obviously out-of-the-box. Patch from Alex Miller.
4326 PH/08 The ${def test on a variable was returning false if the variable's
4327 value was "0", contrary to what the specification has always said!
4328 The result should be true unless the variable is empty.
4330 PH/09 The syntax error of a character other than { following "${if
4331 def:variable_name" (after optional whitespace) was not being diagnosed.
4332 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4333 accidental colon was present, for example, could give incorrect results.
4335 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4336 result is used (not including appendfile, where other changes are about
4339 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4340 This involved changing a lot of size variables from int to off_t. It
4341 should work with maildirs and everything.
4343 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4344 spamd dying while we are connected to it.
4346 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4349 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4350 function for BDB 4.3.
4352 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4354 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4355 the sources for PCRE have been re-arranged and more files are now
4358 PH/15 The code I had for printing potentially long long variables in PH/11
4359 above was not the best (it lost precision). The length of off_t variables
4360 is now inspected at build time, and an appropriate printing format (%ld
4361 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4362 to be "long long int" or "long int". This is needed for the internal
4363 formatting function string_vformat().
4365 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4366 the configuration file to be ":syslog", then the script "guesses" where
4367 the logs files are, rather than using the compiled in default. In our
4368 case the guess is not the same as the compiled default, so the script
4369 suddenly stopped working when I started to use syslog. The patch checks
4370 to see if log_file_path is "". If so, it attempts to read it from exim
4371 with no configuration file to get the compiled in version, before it
4372 falls back to the previous guessing code."
4374 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4375 implementing BATV in an Exim configuration. See NewStuff for the gory
4378 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4379 Makefile that are specific to HP-UX.
4381 PH/18 If the "use_postmaster" option was set for a recipient callout together
4382 with the "random" option, the postmaster address was used as the MAIL
4383 FROM address for the random test, but not for the subsequent recipient
4384 test. It is now used for both.
4386 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4387 patch removes a few documentation additions to RFC 3028, because the
4388 latest draft now contains them. It adds the new en;ascii-case comparator
4389 and a new error check for 8bit text in MIME parts. Comparator and
4390 require names are now matched exactly. I enabled the subaddress
4391 extension, but it is not well tested yet (read: it works for me)."
4393 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4394 rework some of the code of TK/09 above to avoid the hardwired use of
4395 "%lld" and "long long". Replaced the call to snprintf() with a call to
4398 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4399 records point to non-existent hosts", "retry timeout exceeded", and
4400 "retry time not reached for any host after a long failure period".
4402 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4403 experimental DomainKeys support:
4405 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4406 (2) On an error such as an illegally used "control", the wrong name for
4407 the control was given.
4409 These problems did NOT occur unless DomainKeys support was compiled.
4411 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4413 PH/24 Added ${if match_ip condition.
4415 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4416 databases so that it will be absolutely obvious if a crash occurs in the
4417 DB library. This is a regular occurrence (often caused by mis-matched
4420 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4421 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4422 picked up on a user's system that detects such things. There doesn't seem
4423 to be a gcc warning option for this - only an attribute that has to be
4424 put on the function's prototype. It seems that in Fedora Core 4 they have
4425 set this on a number of new functions. No doubt there will be more in due
4428 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4429 specify a transport. However, if an address that was verified by such a
4430 router was the subject of a callout, Exim crashed because it tried to
4431 read the rcpt_include_affixes from the non-existent transport. Now it
4432 just assumes that the setting of that option is false. This bug was
4433 introduced by 4.51/PH/31.
4435 PH/28 Changed -d+all to exclude +memory, because that information is very
4436 rarely of interest, but it makes the output a lot bigger. People tend to
4437 do -d+all out of habit.
4439 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4440 code in os-type was giving problems when libc.so lives in lib64, like on
4443 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4444 aren't the modern standard, and it seems that some systems' include files
4445 don't always have them. Exim was already checking for some of the newer
4446 ones like T_AAAA, and defining it itself. I've added checks for all the
4447 record types that Exim uses.
4449 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4450 not automatically generating a new one, as it is supposed to. This
4451 prevented TLS from working. If the file did exist, but contained invalid
4452 data, a new version was generated, as expected. It was only the case of a
4453 non-existent file that was broken.
4455 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4456 with a change in libdomainkeys > 0.64.
4458 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4459 from DNS. If the selector record carries the flag, it now has
4460 precedence over the domain-wide flag.
4462 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4464 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4465 the use of a port name that isn't defined in /etc/services) occurred, the
4466 message was deferred as in a normal delivery, and thus remained on the
4467 spool, instead of being failed because of the mua_wrapper setting. This
4468 is now fixed, and I tidied up some of the mua_wrapper messages at the
4471 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4472 the messages in a hash of arrays rather than using individual hashes.
4473 This is a bit cleaner and results in dramatic memory savings, albeit
4474 at a slight CPU cost.
4476 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4477 as requested by Marc Sherman.
4479 SC/10 Eximstats: added histograms for user specified patterns as requested
4482 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4484 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4485 fopen() in the content-scanning modules that did not already have it.
4491 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4492 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4494 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4496 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4498 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4499 to test Sieve filters that use "vacation".
4501 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4502 that changes the way the GnuTLS parameters are stored in the cache file.
4503 The new format can be generated externally. For backward compatibility,
4504 if the data in the cache doesn't make sense, Exim assumes it has read an
4505 old-format file, and it generates new data and writes a new file. This
4506 means that you can't go back to an older release without removing the
4509 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4510 work if there are any delivery delays because "one_time" forces the
4511 parent to be marked "delivered", so its unseen clone is never tried
4512 again. For this reason, Exim now forbids the simultaneous setting of
4515 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4516 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4517 entry if you want to know the details. The fix, however, neglected to
4518 consider the case when local delivery batching is involved. The test for
4519 "previously delivered" was not happening when checking to see if an
4520 address could be batched with a previous (undelivered) one; under
4521 certain circumstances this could lead to multiple deliveries to the same
4524 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4525 in its include files, and this causes problems building Exim.
4527 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4528 header_syntax) but Exim was just ignoring anything given after a slash.
4529 In particular, this caused confusion with an attempt to use "verify =
4530 reverse_host_lookup/defer_ok". An error is now given when options are
4531 supplied for verify items that do not have them. (Maybe reverse_host_
4532 lookup should have a defer_ok option, but that's a different point.)
4534 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4535 defined by RFC 821) to 2048, because there were problems with some AUTH
4536 commands, and RFC 1869 says the size should be increased for extended
4537 SMTP commands that take arguments.
4539 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4542 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4543 "unknown" error; now it says that the functionality isn't in the binary.
4545 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4546 an address' error message when a string expansion fails (syntax or
4547 whatever). Otherwise the password may appear in the log. Following change
4548 PH/42 below, there is no longer a chance of it appearing in a bounce
4551 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4553 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4554 of its addresses was ever tried. (Bugzilla bug #2.)
4556 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4557 the result incorrectly in the debug output. (It correctly added a newline
4558 to what was transported.)
4560 TF/01 Added $received_time.
4562 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4563 commented out examples of how to interface to a virus scanner and to
4564 SpamAssassin. Also added commented examples of av_scanner and
4565 spamd_address settings.
4567 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4568 and controls are allowed in which ACLs. There were a couple of minor
4569 errors. Some of the entries in the conditions table (which is a table of
4570 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4571 negation of where the condition IS allowed.
4573 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4575 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4576 header file does not have a version number, so I've had to invent a new
4577 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4578 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4579 radiusclient), but it was contributed by a Radius user.
4581 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4582 files or directories, for OpenSSL.
4584 PH/19 When an Exim process that is running as root has to create an Exim log
4585 file, it does so in a subprocess that runs as exim:exim so as to get the
4586 ownership right at creation (otherwise, other Exim processes might see
4587 the file with the wrong ownership). There was no test for failure of this
4588 fork() call, which would lead to the process getting stuck as it waited
4589 for a non-existent subprocess. Forks do occasionally fail when resources
4590 run out. I reviewed all the other calls to fork(); they all seem to check
4593 PH/20 When checking for unexpected SMTP input at connect time (before writing
4594 the banner), Exim was not dealing correctly with a non-positive return
4595 from the read() function. If the client had disconnected by this time,
4596 the result was a log entry for a synchronization error with an empty
4597 string after "input=" when read() returned zero. If read() returned -1
4598 (an event I could not check), uninitialized data bytes were printed.
4599 There were reports of junk text (parts of files, etc) appearing after
4602 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4604 PH/22 Added support for macro redefinition, and (re)definition in between
4605 driver and ACL definitions.
4607 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4608 forgetting to use the resulting value; it was using the unexpanded value.
4610 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4611 hadn't been configured. The fix is from Juergen Kreileder, who
4612 understands it better than I do:
4614 "Here's what I see happening with three configured cyrus_sasl
4615 authenticators configured (plain, login, cram-md5):
4617 On startup auth_cyrus_sasl_init() gets called for each of these.
4618 This means three calls to sasl_listmech() without a specified mech_list.
4619 => SASL tests which mechs of all available mechs actually work
4620 => three warnings about OTP not working
4621 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4623 With the patch, sasl_listmech() also gets called three times. But now
4624 SASL's mech_list option is set to the server_mech specified in the the
4625 authenticator. Or in other words, the answer from sasl_listmech()
4626 gets limited to just the mech you're testing for (which is different
4628 => the return list contains just 'plain' or 'login', 'cram-md5' or
4629 nothing depending on the value of ob->server_mech.
4631 I've just tested the patch: Authentication still works fine,
4632 unavailable mechs specified in the exim configuration are still
4633 caught, and the auth.log warnings about OTP are gone."
4635 PH/25 When debugging is enabled, the contents of the command line are added
4636 to the debugging output, even when log_selector=+arguments is not
4639 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4640 answer is "GNU", and only if the return is "GNU/something" is the answer
4643 PH/27 $acl_verify_message is now set immediately after the failure of a
4644 verification in an ACL, and so is available in subsequent modifiers. In
4645 particular, the message can be preserved by coding like this:
4647 warn !verify = sender
4648 set acl_m0 = $acl_verify_message
4650 Previously, $acl_verify_message was set only while expanding "message"
4651 and "log_message" when a very denied access.
4653 PH/28 Modified OS/os.c-Linux with
4655 -#ifndef OS_LOAD_AVERAGE
4656 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4658 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4659 nomenclature these days.)
4661 PH/29 Installed patch from the Sieve maintainer that adds the options
4662 sieve_useraddress and sieve_subaddress to the redirect router.
4664 PH/30 In these circumstances:
4665 . Two addresses routed to the same list of hosts;
4666 . First host does not offer TLS;
4667 . First host accepts first address;
4668 . First host gives temporary error to second address;
4669 . Second host offers TLS and a TLS session is established;
4670 . Second host accepts second address.
4671 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4672 and peerdn, if requested) that were in fact used only for the second
4675 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4676 attention to any local part prefix or suffix that was matched by the
4677 router that accepted the address. It now behaves in the same way as it
4678 does for delivery: the affixes are removed from the local part unless
4679 rcpt_include_affixes is set on the transport.
4681 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4682 timeout during the DATA phase of an incoming message.
4684 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4685 applied a patch sanctioned by the Sieve maintainer.
4687 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4688 the uid or gid is negative. A case of a negative gid caused this to be
4689 noticed. The fix allows for either to be negative.
4691 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4692 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4695 PH/36 The change PH/12 above was broken. Fixed it.
4697 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4698 the grounds that routing the same address twice would always produce the
4699 same answer. This might have been true once, but it is certainly no
4700 longer true now. Routing a child address may depend on the previous
4701 routing that produced that child. Some complicated redirection strategies
4702 went wrong when messages had multiple recipients, and made Exim's
4703 behaviour dependent on the order in which the addresses were given.
4705 I have moved the duplicate checking until after the routing is complete.
4706 Exim scans the addresses that are assigned to local and remote
4707 transports, and removes any duplicates. This means that more work will be
4708 done, as duplicates will always all be routed, but duplicates are
4709 presumably rare, so I don't expect this is of any significance.
4711 For deliveries to pipes, files, and autoreplies, the duplicate checking
4712 still happens during the routing process, since they are not going to be
4715 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4716 It corrects a timeout issue with spamd. This is Ian's comment: "The
4717 background is that sometimes spamd either never reads data from a
4718 connection it has accepted, or it never writes response data. The exiscan
4719 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4720 blindly assumes that writes won't block so it may never time out."
4722 PH/39 Allow G after quota size as well as K and M.
4724 PH/40 The value set for $authenticated_id in an authenticator may not contain
4725 binary zeroes or newlines because the value is written to log lines and
4726 to spool files. There was no check on this. Now the value is run through
4727 the string_printing() function so that such characters are converted to
4728 printable escape sequences.
4730 PH/41 $message_linecount is a new variable that contains the total number of
4731 lines in the message. Compare $body_linecount, which is the count for the
4734 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4735 bounce and delay warning messages, except in certain special cases, which
4738 (a) An SMTP error message from a remote host;
4739 (b) A message specified in a :fail: redirection;
4740 (c) A message specified in a "fail" command in a system filter;
4741 (d) A message specified in a FAIL return from the queryprogram router;
4742 (e) A message specified by the cannot_route_message router option.
4744 In these cases only, Exim does include the error details in bounce and
4745 warning messages. There are also a few cases where bland messages such
4746 as "unrouteable address" or "local delivery error" are given.
4748 PH/43 $value is now also set for the "else" part of a ${run expansion.
4750 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4751 being worked on, but at least Exim now implements the latest version to
4754 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4755 process to complete was treated as a delivery failure, a timeout while
4756 writing the message to the pipe was logged, but erroneously treated as a
4757 successful delivery. Such timeouts include transport filter timeouts. For
4758 consistency with the overall process timeout, these timeouts are now
4759 treated as errors, giving rise to delivery failures by default. However,
4760 there is now a new Boolean option for the pipe transport called
4761 timeout_defer, which, if set TRUE, converts the failures into defers for
4762 both kinds of timeout. A transport filter timeout is now identified in
4765 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4766 systems where "make" and "gmake" are different, calling "gmake" at top
4767 level broke things. I've arranged for the value of $(MAKE) to be passed
4768 from the Makefile to this script so that it can call the same version of
4772 A note about Exim versions 4.44 and 4.50
4773 ----------------------------------------
4775 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4776 changes of various kinds. As a consequence, a big documentation update was
4777 needed. This delayed the release for rather longer than seemed good, especially
4778 in the light of a couple of (minor) security issues. Therefore, the changes
4779 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4780 release. So 4.44 and 4.50 are in effect two different branches that both start
4783 I have left the 4.50 change log unchanged; it contains all the changes since
4784 4.43. The change log for 4.44 is below; many of its items are identical to
4785 those for 4.50. This seems to be the most sensible way to preserve the
4786 historical information.
4792 1. Minor wording change to the doc/README.SIEVE file.
4794 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4795 computation of the current number of files was incorrect.
4797 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4798 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4801 4. Give more explanation in the error message when the command for a transport
4802 filter fails to execute.
4804 5. There are several places where Exim runs a non-Exim command in a
4805 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4806 was being done only for the command run by the queryprogram router. It is
4807 now done for all such subprocesses. The other cases are: ${run, transport
4808 filters, and the commands run by the lmtp and pipe transports.
4810 6. Added CONFIGURE_GROUP build-time option.
4812 7. Some older OS have a limit of 256 on the maximum number of file
4813 descriptors. Exim was using setrlimit() to set 1000 as a large value
4814 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4815 systems. I've change it so that if it can't get 1000, it tries for 256.
4817 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4818 was an oversight, and furthermore, ever since the addition of extra
4819 controls (e.g. 4.43/32), the checks on when to allow different forms of
4820 "control" were broken. There should now be diagnostics for all cases when a
4821 control that does not make sense is encountered.
4823 9. Added the /retain_sender option to "control=submission".
4825 10. $recipients is now available in the predata ACL (oversight).
4827 11. Tidy the search cache before the fork to do a delivery from a message
4828 received from the command line. Otherwise the child will trigger a lookup
4829 failure and thereby defer the delivery if it tries to use (for example) a
4830 cached ldap connection that the parent has called unbind on.
4832 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4833 of $address_data from the recipient verification was clobbered by the
4834 sender verification.
4836 13. The value of address_data from a sender verification is now available in
4837 $sender_address_data in subsequent conditions in the ACL statement.
4839 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4841 15. Added a new option "connect=<time>" to callout options, to set a different
4844 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4845 was its contents. (It was OK if the option was not defined at all.)
4847 17. A "Completed" log line is now written for messages that are removed from
4848 the spool by the -Mrm option.
4850 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4851 information about exactly what failed.
4853 19. Added -dd to debug only the daemon process.
4855 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4856 handles timeouts, both on the server side and network timeouts. Renamed the
4857 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4859 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4860 It is now set to "smtps".
4862 22. $host_address is now set to the target address during the checking of
4863 ignore_target_hosts.
4865 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4866 being passed; this would have caused $sender_host_name to have been used if
4867 matching the list had actually called for a host name (not very likely,
4868 since this list is usually IP addresses). A host name is now passed as
4871 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4872 code that specifies a non-restarting handler (typically sigaction() in
4873 modern systems) in an attempt to fix a rare and obscure crash bug.
4875 25. Narrowed the window for a race in the daemon that could cause it to ignore
4876 SIGCHLD signals. This is not a major problem, because they are used only to
4877 wake it up if nothing else does.
4879 26. A malformed maildirsize file could cause Exim to calculate negative values
4880 for the mailbox size or file count. Odd effects could occur as a result.
4881 The maildirsize information is now recalculated if the size or filecount
4884 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4885 support for a long time. Removed HAVE_SYS_VFS_H.
4887 28. Installed the latest version of exipick from John Jetmore.
4889 29. In an address list, if the pattern was not a regular expression, an empty
4890 subject address (from a bounce message) matched only if the pattern was an
4891 empty string. Non-empty patterns were not even tested. This was the wrong
4892 because it is perfectly reasonable to use an empty address as part of a
4893 database query. An empty address is now tested by patterns that are
4894 lookups. However, all the other forms of pattern expect the subject to
4895 contain a local part and a domain, and therefore, for them, an empty
4896 address still always fails if the pattern is not itself empty.
4898 30. Exim went into a mad DNS loop when attempting to do a callout where the
4899 host was specified on an smtp transport, and looking it up yielded more
4900 than one IP address.
4902 31. Re-factored the code for checking spool and log partition space into a
4903 function that finds that data and another that does the check. The former
4904 is then used to implement four new variables: $spool_space, $log_space,
4905 $spool_inodes, and $log_inodes.
4907 32. The RFC2047 encoding function was originally intended for short strings
4908 such as real names; it was not keeping to the 75-character limit for
4909 encoded words that the RFC imposes. It now respects the limit, and
4910 generates multiple encoded words if necessary. To be on the safe side, I
4911 have increased the buffer size for the ${rfc2047: expansion operator from
4914 33. It is now permitted to omit both strings after an "if" condition; if the
4915 condition is true, the result is "true". As before, when the second string
4916 is omitted, a false condition yields an empty string. This makes it less
4917 cumbersome to write custom ACL and router conditions.
4919 34. Failure to deliver a bounce message always caused it to be frozen, even if
4920 there was an errors_to setting on the router. The errors_to setting is now
4923 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4924 canonical form (fully expanded) before being placed in
4925 $sender_host_address.
4927 36. The table in the code that translates DNS record types into text (T_A to
4928 "A" for instance) was missing entries for NS and CNAME. It is just possible
4929 that this could have caused confusion if both these types were looked up
4930 for the same domain, because the text type is used as part of Exim's
4931 per-process caching. But the chance of anyone hitting this buglet seems
4934 37. The dnsdb lookup has been extended in a number of ways.
4936 (1) There is a new type, "zns", which walks up the domain tree until it
4937 finds some nameserver records. It should be used with care.
4939 (2) There is a new type, "mxh", which is like "mx" except that it returns
4940 just the host names, not the priorities.
4942 (3) It is now possible to give a list of domains (or IP addresses) to be
4943 looked up. The behaviour when one of the lookups defers can be
4944 controlled by a keyword.
4946 (4) It is now possible to specify the separator character for use when
4947 multiple records are returned.
4949 38. The dnslists ACL condition has been extended: it is now possible to supply
4950 a list of IP addresses and/or domains to be looked up in a particular DNS
4953 39. Added log_selector=+queue_time_overall.
4955 40. When running the queue in the test harness, wait just a tad after forking a
4956 delivery process, to get repeatability of debugging output.
4958 41. Include certificate and key file names in error message when GnuTLS fails
4959 to set them up, because the GnuTLS error message doesn't include the name
4960 of the failing file when there is a problem reading it.
4962 42. Allow both -bf and -bF in the same test run.
4964 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4966 44. The "Exiscan patch" is now merged into the mainline Exim source.
4968 45. Sometimes the final signoff response after QUIT could fail to get
4969 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4970 < 0 before doing a fflush(). This bug looks as though it goes back to the
4971 introduction of TLS in release 3.20, but "sometimes" must have been rare
4972 because the tests only now provoked it.
4974 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4975 (this can affect the format of dates).
4977 47. exim_tidydb, when checking for the continued existence of a message for
4978 which it has found a message-specific retry record, was not finding
4979 messages that were in split spool directories. Consequently, it was
4980 deleting retry records that should have stayed in existence.
4982 48. Steve fixed some bugs in eximstats.
4984 49. The SPA authentication driver was not abandoning authentication and moving
4985 on to the next authenticator when an expansion was forced to fail,
4986 contradicting the general specification for all authenticators. Instead it
4987 was generating a temporary error. It now behaves as specified.
4989 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4990 (the order specifies the preference for clients). The order is now AES256,
4991 AES128, 3DES, ARCFOUR128.
4993 51. Small patch to Sieve code - explicitly set From: when generating an
4996 52. Exim crashed if a remote delivery caused a very long error message to be
4997 recorded - for instance if somebody sent an entire SpamAssassin report back
4998 as a large number of 550 error lines. This bug was coincidentally fixed by
4999 increasing the size of one of Exim's internal buffers (big_buffer) that
5000 happened as part of the Exiscan merge. However, to be on the safe side, I
5001 have made the code more robust (and fixed the comments that describe what
5004 53. Now that there can be additional text after "Completed" in log lines (if
5005 the queue_time_overall log selector is set), a one-byte patch to exigrep
5006 was needed to allow it to recognize "Completed" as not the last thing in
5009 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5010 patch that reportedly fixes this has been added. I am not expert enough to
5011 create a test for it. This is what the patch creator wrote:
5013 "I found a little strange behaviour of ldap code when working with
5014 Windows 2003 AD Domain, where users was placed in more than one
5015 Organization Units. When I tried to give exim partial DN, the exit code
5016 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5017 But simultaneously result of request was absolutely normal ldap result,
5018 so I produce this patch..."
5020 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5021 REFERENCE, so I have modified the code to exclude the patch when that macro
5024 55. Some experimental protocols are using DNS PTR records for new purposes. The
5025 keys for these records are domain names, not reversed IP addresses. The
5026 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5027 leaves it alone. Component reversal etc. now happens only for IP addresses.
5030 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5032 57. Double the size of the debug message buffer (to 2048) so that more of very
5033 long debug lines gets shown.
5035 58. The exicyclog utility now does better if the number of log files to keep
5036 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5038 59. Two changes related to the smtp_active_hostname option:
5040 (1) $smtp_active_hostname is now available as a variable.
5041 (2) The default for smtp_banner uses $smtp_active_hostname instead
5042 of $primary_hostname.
5044 60. The host_aton() function is supposed to be passed a string that is known
5045 to be a valid IP address. However, in the case of IPv6 addresses, it was
5046 not checking this. This is a hostage to fortune. Exim now panics and dies
5047 if the condition is not met. A case was found where this could be provoked
5048 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5049 components; fortuitously, this particular loophole had already been fixed
5050 by change 4.50/55 above.
5052 If there are any other similar loopholes, the new check in host_aton()
5053 itself should stop them being exploited. The report I received stated that
5054 data on the command line could provoke the exploit when Exim was running as
5055 exim, but did not say which command line option was involved. All I could
5056 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5057 running as the user.
5060 61. There was a buffer overflow vulnerability in the SPA authentication code
5061 (which came originally from the Samba project). I have added a test to the
5062 spa_base64_to_bits() function which I hope fixes it.
5065 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5066 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5068 63. The daemon start-up calls getloadavg() while still root for those OS that
5069 need the first call to be done as root, but it missed one case: when
5070 deliver_queue_load_max is set with deliver_drop_privilege. This is
5071 necessary for the benefit of the queue runner, because there is no re-exec
5072 when deliver_drop_privilege is set.
5074 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5075 This has been fixed.
5077 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5078 was in use, was not putting the data itself into the right store pool;
5079 consequently, it could be overwritten for a subsequent message in the same
5080 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5083 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5085 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5086 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5087 the function were treating the return as a boolean value, which happened to
5088 work because 0=false and not-0=true, but is not correct code.
5090 68. The host_aton() function was not handling scoped IPv6 addresses (those
5091 with, for example, "%eth0" on the end) correctly.
5093 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5094 negated items (that is, ~something) in unsigned ints. Some compilers
5095 apparently mutter when there is no cast.
5097 70. If an address verification called from an ACL failed, and did not produce a
5098 user-specific message (i.e. there was only a "system" message), nothing was
5099 put in $acl_verify_message. In this situation, it now puts the system
5102 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5103 session; change 4.31/43 added the unwanted input to the log line - except
5104 that it did not do this in the start of session case. It now does.
5106 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5107 This is wrong and can cause the other end to generate a synchronization
5108 error if it is another Exim or anything else that does the synchronization
5109 check. A QUIT command is no longer sent after a timeout.
5111 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5112 during host lookups.
5114 74. The defer_ok option of callout verification was not working if it was used
5115 when verifying addresses in header lines, that is, for this case:
5117 verify = header_sender/callout=defer_ok
5119 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5120 those file descriptors could be used for SMTP connections. If anything
5121 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5122 could be sent to the SMTP client, causing chaos. The daemon now opens
5123 stdin, stdout, and stderr to /dev/null when it puts itself into the
5126 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5127 log by default. The user can override this with suitable Perl magic.
5129 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5130 the log message when discard triggers, was not working for the DATA ACL or
5131 for the non-SMTP ACL.
5133 78. Error message wording change in sieve.c.
5135 79. If smtp_accept_max_per_host was set, the number of connections could be
5136 restricted to fewer than expected, because the daemon was trying to set up
5137 a new connection before checking whether the processes handling previous
5138 connections had finished. The check for completed processes is now done
5139 earlier. On busy systems, this bug wouldn't be noticed because something
5140 else would have woken the daemon, and it would have reaped the completed
5143 80. If a message was submitted locally by a user whose login name contained one
5144 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5145 It caused a spool format error. I have fixed the spool reading code. A
5146 related problem was that the "from" clause in the Received: line became
5147 illegal because of the space(s). It is now covered by ${quote_local_part.
5149 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5152 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5154 83. Patch from Sieve maintainer to fix unterminated string problem in
5155 "vacation" handling.
5157 84. Some minor changes to the Linux configuration files to help with other
5158 OS variants using glibc.
5160 85. One more patch for Sieve to update vacation handling to latest spec.
5163 ----------------------------------------------------
5164 See the note above about the 4.44 and 4.50 releases.
5165 ----------------------------------------------------
5171 1. Change 4.43/35 introduced a bug that caused file counts to be
5172 incorrectly computed when quota_filecount was set in an appendfile
5175 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5176 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5179 3. Give more explanation in the error message when the command for a transport
5180 filter fails to execute.
5182 4. There are several places where Exim runs a non-Exim command in a
5183 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5184 was being done only for the command run by the queryprogram router. It is
5185 now done for all such subprocesses. The other cases are: ${run, transport
5186 filters, and the commands run by the lmtp and pipe transports.
5188 5. Some older OS have a limit of 256 on the maximum number of file
5189 descriptors. Exim was using setrlimit() to set 1000 as a large value
5190 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5191 systems. I've change it so that if it can't get 1000, it tries for 256.
5193 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5194 was an oversight, and furthermore, ever since the addition of extra
5195 controls (e.g. 4.43/32), the checks on when to allow different forms of
5196 "control" were broken. There should now be diagnostics for all cases when a
5197 control that does not make sense is encountered.
5199 7. $recipients is now available in the predata ACL (oversight).
5201 8. Tidy the search cache before the fork to do a delivery from a message
5202 received from the command line. Otherwise the child will trigger a lookup
5203 failure and thereby defer the delivery if it tries to use (for example) a
5204 cached ldap connection that the parent has called unbind on.
5206 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5207 of $address_data from the recipient verification was clobbered by the
5208 sender verification.
5210 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5211 was its contents. (It was OK if the option was not defined at all.)
5213 11. A "Completed" log line is now written for messages that are removed from
5214 the spool by the -Mrm option.
5216 12. $host_address is now set to the target address during the checking of
5217 ignore_target_hosts.
5219 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5220 being passed; this would have caused $sender_host_name to have been used if
5221 matching the list had actually called for a host name (not very likely,
5222 since this list is usually IP addresses). A host name is now passed as
5225 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5226 code that specifies a non-restarting handler (typically sigaction() in
5227 modern systems) in an attempt to fix a rare and obscure crash bug.
5229 15. Narrowed the window for a race in the daemon that could cause it to ignore
5230 SIGCHLD signals. This is not a major problem, because they are used only to
5231 wake it up if nothing else does.
5233 16. A malformed maildirsize file could cause Exim to calculate negative values
5234 for the mailbox size or file count. Odd effects could occur as a result.
5235 The maildirsize information is now recalculated if the size or filecount
5238 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5239 support for a long time. Removed HAVE_SYS_VFS_H.
5241 18. Updated exipick to current release from John Jetmore.
5243 19. Allow an empty sender to be matched against a lookup in an address list.
5244 Previously the only cases considered were a regular expression, or an
5247 20. Exim went into a mad DNS lookup loop when doing a callout where the
5248 host was specified on the transport, if the DNS lookup yielded more than
5251 21. The RFC2047 encoding function was originally intended for short strings
5252 such as real names; it was not keeping to the 75-character limit for
5253 encoded words that the RFC imposes. It now respects the limit, and
5254 generates multiple encoded words if necessary. To be on the safe side, I
5255 have increased the buffer size for the ${rfc2047: expansion operator from
5258 22. Failure to deliver a bounce message always caused it to be frozen, even if
5259 there was an errors_to setting on the router. The errors_to setting is now
5262 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5263 canonical form (fully expanded) before being placed in
5264 $sender_host_address.
5266 24. Updated eximstats to version 1.33
5268 25. Include certificate and key file names in error message when GnuTLS fails
5269 to set them up, because the GnuTLS error message doesn't include the name
5270 of the failing file when there is a problem reading it.
5272 26. Expand error message when OpenSSL has problems setting up cert/key files.
5275 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5276 (this can affect the format of dates).
5278 28. exim_tidydb, when checking for the continued existence of a message for
5279 which it has found a message-specific retry record, was not finding
5280 messages that were in split spool directories. Consequently, it was
5281 deleting retry records that should have stayed in existence.
5283 29. eximstats updated to version 1.35
5284 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5285 1.35 - bugfix such that pie charts by volume are generated correctly
5287 30. The SPA authentication driver was not abandoning authentication and moving
5288 on to the next authenticator when an expansion was forced to fail,
5289 contradicting the general specification for all authenticators. Instead it
5290 was generating a temporary error. It now behaves as specified.
5292 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5293 (the order specifies the preference for clients). The order is now AES256,
5294 AES128, 3DES, ARCFOUR128.
5296 31. Small patch to Sieve code - explicitly set From: when generating an
5299 32. Exim crashed if a remote delivery caused a very long error message to be
5300 recorded - for instance if somebody sent an entire SpamAssassin report back
5301 as a large number of 550 error lines. This bug was coincidentally fixed by
5302 increasing the size of one of Exim's internal buffers (big_buffer) that
5303 happened as part of the Exiscan merge. However, to be on the safe side, I
5304 have made the code more robust (and fixed the comments that describe what
5307 33. Some experimental protocols are using DNS PTR records for new purposes. The
5308 keys for these records are domain names, not reversed IP addresses. The
5309 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5310 leaves it alone. Component reversal etc. now happens only for IP addresses.
5313 34. The host_aton() function is supposed to be passed a string that is known
5314 to be a valid IP address. However, in the case of IPv6 addresses, it was
5315 not checking this. This is a hostage to fortune. Exim now panics and dies
5316 if the condition is not met. A case was found where this could be provoked
5317 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5318 components; fortuitously, this particular loophole had already been fixed
5319 by change 4.50/55 or 4.44/33 above.
5321 If there are any other similar loopholes, the new check in host_aton()
5322 itself should stop them being exploited. The report I received stated that
5323 data on the command line could provoke the exploit when Exim was running as
5324 exim, but did not say which command line option was involved. All I could
5325 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5326 running as the user.
5329 35. There was a buffer overflow vulnerability in the SPA authentication code
5330 (which came originally from the Samba project). I have added a test to the
5331 spa_base64_to_bits() function which I hope fixes it.
5334 36. The daemon start-up calls getloadavg() while still root for those OS that
5335 need the first call to be done as root, but it missed one case: when
5336 deliver_queue_load_max is set with deliver_drop_privilege. This is
5337 necessary for the benefit of the queue runner, because there is no re-exec
5338 when deliver_drop_privilege is set.
5340 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5341 was in use, was not putting the data itself into the right store pool;
5342 consequently, it could be overwritten for a subsequent message in the same
5343 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5346 38. Sometimes the final signoff response after QUIT could fail to get
5347 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5348 < 0 before doing a fflush(). This bug looks as though it goes back to the
5349 introduction of TLS in release 3.20, but "sometimes" must have been rare
5350 because the tests only now provoked it.
5356 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5357 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5358 Now it returns an integer. A number of calls were still expecting a T/F
5359 return. Fortuitously, in all cases, the tests worked in OK situations,
5360 which is the norm. However, things would have gone wrong on any write
5361 failures on the smtp file descriptor. This function is used when sending
5362 messages over SMTP and also when doing verify callouts.
5364 2. When Exim is called to do synchronous delivery of a locally submitted
5365 message (the -odf or -odi options), it no longer closes stderr before doing
5368 3. Implemented the mua_wrapper option.
5370 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5372 5. Implemented the functions header_remove(), header_testname(),
5373 header_add_at_position(), and receive_remove_recipient(), and exported them
5376 6. If an ACL "warn" statement specified the addition of headers, Exim already
5377 inserted X-ACL-Warn: at the start if there was no header name. However, it
5378 was not making this test for the second and subsequent header lines if
5379 there were newlines in the string. This meant that an invalid header could
5380 be inserted if Exim was badly configured.
5382 7. Allow an ACL "warn" statement to add header lines at the start or after all
5383 the Received: headers, as well as at the end.
5385 8. Added the rcpt_4xx retry error code.
5387 9. Added postmaster_mailfrom=xxx to callout verification option.
5389 10. Added mailfrom=xxxx to the callout verification option, for verify=
5392 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5393 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5395 12. Inserted some casts to stop certain compilers warning when using pointer
5396 differences as field lengths or precisions in printf-type calls (mostly
5397 affecting debugging statements).
5399 13. Added optional readline() support for -be (dynamically loaded).
5401 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5402 same clock tick as a message's arrival, so that its received time was the
5403 same as the "first fail" time on the retry record, and that message
5404 remained on the queue past the ultimate address timeout, every queue runner
5405 would try a delivery (because it was past the ultimate address timeout) but
5406 after another failure, the ultimate address timeout, which should have then
5407 bounced the address, did not kick in. This was a "< instead of <=" error;
5408 in most cases the first failure would have been in the next clock tick
5409 after the received time, and all would be well.
5411 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5412 being recognized when the domain list was tested by the match_domain
5413 condition in an expansion string.
5415 16. Added the ${str2b64: operator.
5417 17. Exim was always calling setrlimit() to set a large limit for the number of
5418 processes, without checking whether the existing limit was already
5419 adequate. (It did check for the limit on file descriptors.) Furthermore,
5420 errors from getrlimit() and setrlimit() were being ignored. Now they are
5421 logged to the main and panic logs, but Exim does carry on, to try to do its
5422 job under whatever limits there are.
5424 18. Imported PCRE 5.0.
5426 19. Trivial typo in log message " temporarily refused connection" (the leading
5429 20. If the log selector return_path_on_delivery was set and an address was
5430 redirected to /dev/null, the delivery process crashed because it assumed
5431 that a return path would always be set for a "successful" delivery. In this
5432 case, the whole delivery is bypassed as an optimization, and therefore no
5435 21. Internal re-arrangement: the function for sending a challenge and reading
5436 a response while authentication was assuming a zero-terminated challenge
5437 string. It's now changed to take a pointer and a length, to allow for
5438 binary data in such strings.
5440 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5442 23. Exim was not respecting finduser_retries when seeking the login of the
5443 uid under which it was called; it was always trying 10 times. (The default
5444 setting of finduser_retries is zero.) Also, it was sleeping after the final
5445 failure, which is pointless.
5447 24. Implemented tls_on_connect_ports.
5449 25. Implemented acl_smtp_predata.
5451 26. If the domain in control=submission is set empty, Exim assumes that the
5452 authenticated id is a complete email address when it generates From: or
5453 Sender: header lines.
5455 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5456 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5457 chown and chgrp in /bin and hostname in /usr/bin.
5459 28. Exim was keeping the "process log" file open after each use, just as it
5460 does for the main log. This opens the possibility of it remaining open for
5461 long periods when the USR1 signal hits a daemon. Occasional processlog
5462 errors were reported, that could have been caused by this. Anyway, it seems
5463 much more sensible not to leave this file open at all, so that is what now
5466 29. The long-running daemon process does not normally write to the log once it
5467 has entered its main loop, and it closes the log before doing so. This is
5468 so that log files can straightforwardly be renamed and moved. However,
5469 there are a couple of unusual error situations where the daemon does write
5470 log entries, and I had neglected to close the log afterwards.
5472 30. The text of an SMTP error response that was received during a remote
5473 delivery was being truncated at 512 bytes. This is too short for some of
5474 the long messages that one sometimes sees. I've increased the limit to
5477 31. It is now possible to make retry rules that apply only when a message has a
5478 specific sender, in particular, an empty sender.
5480 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5481 it possible to be selective about when SMTP synchronization is enforced.
5483 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5485 32. Implemented hosts_connection_nolog.
5487 33. Added an ACL for QUIT.
5489 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5492 35. Added mailbox_size and mailbox_filecount to appendfile.
5494 36. Added control = no_multiline_responses to ACLs.
5496 37. There was a bug in the logic of the code that waits for the clock to tick
5497 in the case where the clock went backwards by a substantial amount such
5498 that the microsecond fraction of "now" was more than the microsecond
5499 fraction of "then" (but the whole seconds number was less).
5501 38. Added support for the libradius Radius client library this is found on
5502 FreeBSD (previously only the radiusclient library was supported).
5508 1. When certain lookups returned multiple values in the form name=value, the
5509 quoting of the values was not always being done properly. Specifically:
5510 (a) If the value started with a double quote, but contained no whitespace,
5512 (b) If the value contained whitespace other than a space character (i.e.
5513 tabs or newlines or carriage returns) it was not quoted.
5514 This fix has been applied to the mysql and pgsql lookups by writing a
5515 separate quoting function and calling it from the lookup code. The fix
5516 should probably also be applied to nisplus, ibase and oracle lookups, but
5517 since I cannot test any of those, I have not disturbed their existing code.
5519 2. A hit in the callout cache for a specific address caused a log line with no
5520 reason for rejecting RCPT. Now it says "Previous (cached) callout
5521 verification failure".
5523 3. There was an off-by-one bug in the queryprogram router. An over-long
5524 return line was truncated at 256 instead of 255 characters, thereby
5525 overflowing its buffer with the terminating zero. As well as fixing this, I
5526 have increased the buffer size to 1024 (and made a note to document this).
5528 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5529 when Exim is waiting for an SMTP response from a remote server, Exim
5530 restarts its select() call on the socket, thereby resetting its timeout.
5531 This is not a problem when such interrupts are rare. Somebody set up a cron
5532 job to run exiwhat every 2 minutes, which is less than the normal select()
5533 timeout (5 or 10 minutes). This meant that the select() timeout never
5534 kicked in because it was always reset. I have fixed this by comparing the
5535 time when an interrupt arrives with the time at the start of the first call
5536 to select(). If more time than the timeout has elapsed, the interrupt is
5537 treated as a timeout.
5539 5. Some internal re-factoring in preparation for the addition of Sieve
5540 extensions (by MH). In particular, the "personal" test is moved to a
5541 separate function, and given an option for scanning Cc: and Bcc: (which is
5542 not set for Exim filters).
5544 6. When Exim created an email address using the login of the caller as the
5545 local part (e.g. when creating a From: or Sender: header line), it was not
5546 quoting the local part when it contained special characters such as @.
5548 7. Installed new OpenBSD configuration files.
5550 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5551 try to make them clearer.
5553 9. Callout options, other than the timeout value, were being ignored when
5554 verifying sender addresses in header lines. For example, when using
5556 verify = header_sender/callout=no_cache
5558 the cache was (incorrectly) being used.
5560 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5561 only the Cygwin environment.
5563 11. When return_path_on_delivery was set as a log selector, if different remote
5564 addresses in the same message used different return paths and parallel
5565 remote delivery occurred, the wrong values would sometimes be logged.
5566 (Whenever a remote delivery process finished, the return path value from
5567 the most recently started remote delivery process was logged.)
5569 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5570 lines when AUTH and/or TLS are in use. This is the "received protocol"
5571 field. Exim used to use "asmtp" for authenticated SMTP, without any
5572 indication (in the protocol name) for TLS use. Now it follows the RFC and
5573 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5574 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5575 names appear in log lines as well as in Received: header lines.
5577 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5578 extensions, and comparison tests, and to fix some bugs.
5580 14. Changes to the "personal" filter test:
5582 (1) The test was buggy in that it was just doing the equivalent of
5583 "contains" tests on header lines. For example, if a user's address was
5584 anne@some.where, the "personal" test would incorrectly be true for
5586 To: susanne@some.where
5588 This test is now done by extracting each address from the header in turn,
5589 and checking the entire address. Other tests that are part of "personal"
5590 are now done using regular expressions (for example, to check local parts
5591 of addresses in From: header lines).
5593 (2) The list of non-personal local parts in From: addresses has been
5594 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5595 taken from the Sieve specification recommendations.
5597 (3) If the message contains any header line starting with "List-" it is
5598 treated as non-personal.
5600 (4) The test for "circular" in the Subject: header line has been removed
5601 because it now seems ill-conceived.
5603 15. Minor typos in src/EDITME comments corrected.
5605 16. Installed latest exipick from John Jetmore.
5607 17. If headers_add on a router specified a text string that was too long for
5608 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5609 of string_sprintf() is now avoided.
5611 18. $message_body_size was not set (it was always zero) when running the DATA
5612 ACL and the local_scan() function.
5614 19. For the "mail" command in an Exim filter, no default was being set for
5615 the once_repeat time, causing a random time value to be used if "once" was
5616 specified. (If the value happened to be <= 0, no repeat happened.) The
5617 default is now 0s, meaning "never repeat". The "vacation" command was OK
5618 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5619 (I found it when inspecting the code).
5621 20. There is now an overall timeout for performing a callout verification. It
5622 defaults to 4 times the callout timeout, which applies to individual SMTP
5623 commands during the callout. The overall timeout applies when there is more
5624 than one host that can be tried. The timeout is checked before trying the
5625 next host. This prevents very long delays if there are a large number of
5626 hosts and all are timing out (e.g. when the network connections are timing
5627 out). The value of the overall timeout can be changed by specifying an
5628 additional sub-option for "callout", called "maxwait". For example:
5630 verify = sender/callout=5s,maxwait=20s
5632 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5633 to the end before writing, but this should make it even safer).
5635 22. Exim was forgetting that it had advertised PIPELINING for the second and
5636 subsequent messages on an SMTP connection. It was also not resetting its
5637 memory on STARTTLS and an internal HELO.
5639 23. When Exim logs an SMTP synchronization error within a session, it now
5640 records whether PIPELINING has been advertised or not.
5642 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5643 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5644 rather than long int.
5646 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5648 26. Added the never_mail option to autoreply.
5654 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5655 crash if the getsockname() call failed; this can happen if a connection is
5656 closed very soon after it is established. The problem was simply in the
5657 order in which certain operations were done, causing Exim to try to write
5658 to the SMTP stream before it had set up the file descriptor. The bug has
5659 been fixed by making things happen in the correct order.
5665 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5666 before the connection was closed, thus losing the rejection response.
5668 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5669 some early Solaris releases, but causes trouble in current releases where
5670 socklen_t is defined.
5672 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5675 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5678 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5679 that releasing the top of it at the end releases what was used for sub-
5680 expansions (unless the block got too big). However, discard this block if
5681 the first thing is a variable or header, so that we can use its block when
5682 it is dynamic (useful for very large $message_headers, for example).
5684 6. Lookups now cache *every* query, not just the most recent. A new, separate
5685 store pool is used for this. It can be recovered when all lookup caches are
5686 flushed. Lookups now release memory at the end of their result strings.
5687 This has involved some general refactoring of the lookup sources.
5689 7. Some code has been added to the store_xxx() functions to reduce the amount
5690 of flapping under certain conditions.
5692 8. log_incoming_interface used to affect only the <= reception log lines. Now
5693 it causes the local interface and port to be added to several more SMTP log
5694 lines, for example "SMTP connection from", and rejection lines.
5696 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5698 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5700 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5701 could be overwritten at the end of the current message (or the start of a
5702 new message if it was set in a HELO ACL). The value is now preserved for
5703 the duration of the SMTP connection.
5705 12. If a transport had a headers_rewrite setting, and a matching header line
5706 contained an unqualified address, that address was qualified, even if it
5707 did not match any rewriting rules. The underlying bug was that the values
5708 of the flags that permit the existence of unqualified sender and recipient
5709 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5710 non-local messages, and by -bnq for local messages) were not being
5711 preserved with the message after it was received.
5713 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5714 "next input=" as part of the text comprising the host identity instead of
5715 the correct text. The code was using the same buffer for two different
5716 strings. However, depending on which order the printing function evaluated
5717 its arguments, the bug did not always show up. Under Linux, for example, my
5718 test suite worked just fine.
5720 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5721 doesn't work with some older versions of Perl. It has been changed to "my",
5722 which in any case is probably the better facility to use.
5724 15. A really picky compiler found some instances of statements for creating
5725 error messages that either had too many or two few arguments for the format
5728 16. The size of the buffer for calls to the DNS resolver has been increased
5729 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5730 for addresses that have a lot of PTR records. This alleviates a problem; it
5731 does not fully solve it.
5733 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5734 buffer now truncates the list and logs the incident, which is the same
5735 action as happens when Exim is looking up a host name and its aliases.
5736 Previously in this situation something unpredictable would happen;
5737 sometimes it was "internal error: store_reset failed".
5739 18. If a server dropped the connection unexpectedly when an Exim client was
5740 using GnuTLS and trying to read a response, the client delivery process
5741 crashed while trying to generate an error log message.
5743 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5744 string, for example:
5746 warn message = H1: something\nH2: something
5748 the text was added as a single header line from Exim's point of view
5749 though it ended up OK in the delivered message. However, searching for the
5750 second and subsequent header lines using $h_h2: did not work. This has been
5751 fixed. Similarly, if a system filter added multiple headers in this way,
5752 the routers could not see them.
5754 20. Expanded the error message when iplsearch is called with an invalid key to
5755 suggest using net-iplsearch in a host list.
5757 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5758 ACLs are no longer actually imposed (and a message to that effect is
5761 22. If a "gecos" field in a passwd entry contained escaped characters, in
5762 particular, if it contained a \" sequence, Exim got it wrong when building
5763 a From: or a Sender: header from that name. A second bug also caused
5764 incorrect handling when an unquoted " was present following a character
5765 that needed quoting.
5767 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5768 was not being matched caselessly.
5770 24. Arranged for all hyphens in the exim.8 source to be escaped with
5773 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5774 properly. Recipient callout cache records were still being keyed to include
5775 the sender, even when use_sender was set false. This led to far more
5776 callouts that were necessary. The sender is no longer included in the key
5777 when use_sender is false.
5779 26. Added "control = submission" modifier to ACLs.
5781 27. Added the ${base62d: operator to decode base 62 numbers.
5783 28. dnsdb lookups can now access SRV records.
5785 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5786 the configuration file.
5788 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5789 (-v) mode. This makes the output for a verbose queue run more intelligible.
5791 31. Added a use_postmaster feature to recipient callouts.
5793 32. Added the $body_zerocount variable, containing the number of binary zero
5794 bytes in the message body.
5796 33. The time of last modification of the "new" subdirectory is now used as the
5797 "mailbox time last read" when there is a quota error for a maildir
5800 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5802 35. Added +ignore_unknown as a special item in host lists.
5804 36. Code for decoding IPv6 addresses in host lists is now included, even if
5805 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5806 address was recognized as an IP address, but was then not correctly decoded
5807 into binary, causing unexpected and incorrect effects when compared with
5814 1. Very minor rewording of debugging text in manualroute to say "list of
5815 hosts" instead of "hostlist".
5817 2. If verify=header_syntax was set, and a header line with an unqualified
5818 address (no domain) and a large number of spaces between the end of the
5819 name and the colon was received, the reception process suffered a buffer
5820 overflow, and (when I tested it) crashed. This was caused by some obsolete
5821 code that should have been removed. The fix is to remove it!
5823 3. When running in the test harness, delay a bit after writing a bounce
5824 message to get a bit more predictability in the log output.
5826 4. Added a call to search_tidyup() just before forking a reception process. In
5827 theory, someone could use a lookup in the expansion of smtp_accept_max_
5828 per_host which, without the tidyup, could leave open a database connection.
5830 5. Added the variables $recipient_data and $sender_data which get set from a
5831 lookup success in an ACL "recipients" or "senders" condition, or a router
5832 "senders" option, similar to $domain_data and $local_part_data.
5834 6. Moved the writing of debug_print from before to after the "senders" test
5837 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5838 problems for message scanning, either using a data ACL, or using
5839 local_scan() because the Received: header was not generated till after they
5840 were called (in order to set the time as the time of reception completion).
5841 I have revised the way this works. The header is now generated after the
5842 body is received, but before the ACL or local_scan() are called. After they
5843 are run, the timestamp in the header is updated.
5849 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5850 before starting a queue runner without re-exec. This happened only when
5851 deliver_drop_privilege was set or when the Exim user was set to root. The
5852 effect of the bug was that timeouts during subsequent deliveries caused
5853 crashes instead of being properly handled. The handler is now left at its
5854 default (and expected) setting.
5856 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5857 message, again when deliver_drop_privilege is set or Exim is run as root.
5858 The bug described in (1) was not present in this case, but the tidying up
5859 of the other signals was missing. I have made the two cases consistent.
5861 3. The ignore_target_hosts setting on a manualroute router was being ignored
5862 for hosts that were looked up using the /MX notation.
5864 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5867 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5868 operated on the sender address. After changing the $sender_address to <>
5869 for the sender address verify, Exim was re-instated it as the original
5870 (before rewriting) address, but remembering that it had rewritten it, so it
5871 wasn't rewriting it again. This bug also had the effect of breaking the
5872 sender address verification caching when the sender address was rewritten.
5874 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5875 This has been changed so that if the ip literal address matches
5876 ignore_target_hosts, the router declines.
5878 7. Added expansion conditions match_domain, match_address, and match_local_
5879 part (NOT match_host).
5881 8. The placeholder for the Received: header didn't have a length field set.
5883 9. Added code to Exim itself and to exim_lock to test for a specific race
5884 condition that could lead to file corruption when using MBX delivery. The
5885 issue is with the lockfile that is created in /tmp. If this file is removed
5886 after a process has opened it but before that process has acquired a lock,
5887 there is the potential for a second process to recreate the file and also
5888 acquire a lock. This could lead to two Exim processes writing to the file
5889 at the same time. The added code performs the same test as UW imapd; it
5890 checks after acquiring the lock that its file descriptor still refers to
5891 the same named file.
5893 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5894 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5897 11. Added the smtp_active_hostname option. If used, this will typically be made
5898 to depend on the incoming interface address. Because $interface_address is
5899 not set up until the daemon has forked a reception process, error responses
5900 that can happen earlier (such as "too many connections") no longer contain
5903 12. If an expansion in a condition on a "warn" statement fails because a lookup
5904 defers, the "warn" statement is abandoned, and the next ACL statement is
5905 processed. Previously this caused the whole ACL to be aborted.
5907 13. Added the iplsearch lookup type.
5909 14. Added ident_timeout as a log selector.
5911 15. Added tls_certificate_verified as a log selector.
5913 16. Added a global option tls_require_ciphers (compare the smtp transport
5914 option of the same name). This controls incoming TLS connections.
5916 17. I finally figured out how to make tls_require_ciphers do a similar thing
5917 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5918 before starting the TLS session.
5920 18. Tabs are now shown as \t in -bP output.
5922 19. If the log selector return_path_on_delivery was set, Exim crashed when
5923 bouncing a message because it had too many Received: header lines.
5925 20. If two routers both had headers_remove settings, and the first one included
5926 a superfluous trailing colon, the final name in the first list and the
5927 first name in the second list were incorrectly joined into one item (with a
5928 colon in the middle).
5934 1. Added -C and -D options to the exinext utility, mainly to make it easier
5935 to include in the automated testing, but these could be helpful when
5936 multiple configurations are in use.
5938 2. The exinext utility was not formatting the output nicely when there was
5939 an alternate port involved in the retry record key, nor when there was a
5940 message id as well (for retries that were specific to a specific message
5941 and a specific host). It was also confused by IPv6 addresses, because of
5942 the additional colons they contain. I have fixed the IPv4 problem, and
5943 patched it up to do a reasonable job for IPv6.
5945 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5946 delivery, the log line now contains "pipelined" if PIPELINING was used.
5948 4. An SMTP transport process used to panic and die if the bind() call to set
5949 an explicit outgoing interface failed. This has been changed; it is now
5950 treated in the same way as a connect() failure.
5952 5. A reference to $sender_host_name in the part of a conditional expansion
5953 that was being skipped was still causing a DNS lookup. This no longer
5956 6. The def: expansion condition was not recognizing references to header lines
5957 that used bh_ and bheader_.
5959 7. Added the _cache feature to named lists.
5961 8. The code for checking quota_filecount in the appendfile transport was
5962 allowing one more file than it should have been.
5964 9. For compatibility with Sendmail, the command line option
5972 and sets the incoming protocol and host name (for trusted callers). The
5973 host name and its colon can be omitted when only the protocol is to be set.
5974 Note the Exim already has two private options, -pd and -ps, that refer to
5975 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5976 "s", but I don't think that's a major issue.
5978 10. A number of refactoring changes to the code, none of which should affect
5981 (a) The number of logging options was getting close to filling up the
5982 32-bit word that was used as a bit map. I have split them into two classes:
5983 those that are passed in the argument to log_write(), and those that are
5984 only ever tested independently outside of that function. These are now in
5985 separate 32-bit words, so there is plenty of room for expansion again.
5986 There is no change in the user interface or the logging behaviour.
5988 (b) When building, for example, log lines, the code previously used a
5989 macro that called string_cat() twice, in order to add two strings. This is
5990 not really sufficiently general. Furthermore, there was one instance where
5991 it was actually wrong because one of the argument was used twice, and in
5992 one call a function was used. (As it happened, calling the function twice
5993 did not affect the overall behaviour.) The macro has been replaced by a
5994 function that can join an arbitrary number of extra strings onto a growing
5997 (c) The code for expansion conditions now uses a table and a binary chop
5998 instead of a serial search (which was left over from when there were very
5999 few conditions). Also, it now recognizes conditions like "pam" even when
6000 the relevant support is not compiled in: a suitably worded error message is
6001 given if an attempt is made to use such a condition.
6003 11. Added ${time_interval:xxxxx}.
6005 12. A bug was causing one of the ddress fields not to be passed back correctly
6006 from remote delivery subprocesses. The field in question was not being
6007 subsequently used, so this caused to problems in practice.
6009 13. Added new log selectors queue_time and deliver_time.
6011 14. Might have fixed a bug in maildirsizefile handling that threw up
6012 "unexpected character" debug warnings, and recalculated the data
6013 unnecessarily. In any case, I expanded the warning message to give more
6016 15. Added the message "Restricted characters in address" to the statements in
6017 the default ACL that block characters like @ and % in local parts.
6019 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6020 Three changes have been made:
6022 (a) There was a serious bug; a negative response to MAIL caused the whole
6023 recipient domain to be cached as invalid, thereby blocking all messages
6024 to all local parts at the same domain, from all senders. This bug has
6025 been fixed. The domain is no longer cached after a negative response to
6026 MAIL if the sender used is not empty.
6028 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6031 (c) A new callout option, "use_sender" has been added for people who want
6032 the modified behaviour.
6038 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6041 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6042 indeed breaks things for older releases.
6044 3. Added additional logging to the case where there is a problem reading data
6045 from a filter that is running in a subprocess using a pipe, in order to
6046 try to track down a specific problem.
6048 4. Testing facility fudge: when running in the test harness and attempting
6049 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6050 getting "No route to host". Convert this to a timeout.
6052 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6055 6. Some OS don't have socklen_t but use size_t instead. This affects the
6056 fifth argument of getsockopt() amongst other things. This is now
6057 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6058 can be set for individual OS. I have set it for SunOS5, OSF1, and
6059 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6060 some earlier ones do not.
6062 7. Change 4.30/15 was not doing the test caselessly.
6064 8. The standard form for an IPv6 address literal was being rejected by address
6065 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6066 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6067 this, as well as the form without the "IPv6" on the front (but only when
6068 address literals are enabled, of course).
6070 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6072 10. Exim crashed if a message with an empty sender address specified by -f
6073 encountered a router with an errors_to setting. This could be provoked only
6074 by a command such as
6078 where an empty string was supplied; "<>" did not hit this bug.
6080 11. Installed PCRE release 4.5.
6082 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6083 remained set. It is now erased.
6085 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6086 times from message ids (which are base 36 rather than the normal 62).
6088 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6089 were being counted as actual protocol errors, and logged if the log
6090 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6091 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6092 and DATA following a set of rejected RCPTs do not count as protocol errors.
6093 In other words, Exim assumes they were pipelined, though this may not
6094 actually be the case. Of course, in all cases the client gets an
6095 appropriate error code.
6097 15. If a lookup fails in an ACL condition, a message about the failure may
6098 be available; it is used if testing the ACL cannot continue, because most
6099 such messages specify what the cause of the deferral is. However, some
6100 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6101 that caused an old message to be retained and used if a later statement
6102 caused a defer, replacing the real cause of the deferral.
6104 16. If an IP address had so many PTR records that the DNS lookup buffer
6105 was not large enough to hold them, Exim could crash while trying to process
6106 the truncated data. It now detects and logs this case.
6108 17. Further to 4.21/58, another change has been made: if (and only if) the
6109 first line of a message (the first header line) ends with CRLF, a bare LF
6110 in a subsequent header line has a space inserted after it, so as not to
6111 terminate the header.
6113 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6114 unnecessarily, used atoi() instead of strtol(), and didn't check the
6115 termination when getting file sizes from file names by regex.
6117 19. Completely re-implemented the support for maildirsize files, in the light
6118 of a number of problems with the previous contributed implementation
6119 (4.30/29). In particular:
6121 . If the quota is zero, the maildirsize file is maintained, but no quota is
6124 . If the maildir directory does not exist, it is created before any attempt
6125 to write a maildirsize file.
6127 . The quota value in the file is just a cache; if the quota is changed in
6128 the transport, the new value overrides.
6130 . A regular expression is available for excluding directories from the
6133 20. The autoreply transport checks the characters in options that define the
6134 message's headers; it allows continued headers, but it was checking with
6135 isspace() after an embedded newline instead of explicitly looking for a
6138 21. If all the "regular" hosts to which an address was routed had passed their
6139 expiry times, and had not reached their retry times, the address was
6140 bounced, even if fallback hosts were defined. Now Exim should go on to try
6143 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6144 equivalent code in the SMTP transport. Some hosts send humungous responses
6145 to HELO/EHLO, more than 1024 it seems.
6147 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6148 gives compiler warnings in some environments. I've now done it "properly",
6151 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6152 (because of problems with the built-in one) was declared to return uschar *
6153 instead of char *, causing compiler failure.
6155 25. Fixed a file descriptor leak when processing alias/forward files.
6157 26. Fixed a minor format string issue in dbfn.c.
6159 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6161 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6162 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6165 29. When a sender address is verified, it is cached, to save repeating the test
6166 when there is more than one recipient in a message. However, when the
6167 verification involves a callout, it is possible for different callout
6168 options to be set for different recipients. It is too complicated to keep
6169 track of this in the cache, so now Exim always runs a verification when a
6170 callout is required, relying on the callout cache for the optimization.
6171 The overhead is duplication of the address routing, but this should not be
6174 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6175 to be verified with callout=postmaster, and the main callout worked but the
6176 postmaster check failed, the verification correctly failed. However, if a
6177 subsequent RCPT command asked for sender verification *without* the
6178 postmaster check, incorrect caching caused this verification also to fail,
6181 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6182 it was not caching the DNS options (qualify_single, search_parents) that
6183 were used when the lookup failed. A subsequent lookup with different
6184 options therefore always gave the same answer, though there were cases
6185 where it should not have. (Example: a "domains = !$mx_any" option on a
6186 dnslookup router: the "domains" option is always processed without any
6187 widening, but the router might have qualify_single set.) Now Exim uses the
6188 cached value only when the same options are set.
6190 32. Added John Jetmore's "exipick" utility to the distribution.
6192 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6193 than a timeout (e.g. a certificate is required, and is not provided), an
6194 Exim server now closes the connection immediately. Previously it waited for
6195 the client to close - but if the client is SSL, it seems that they each
6196 wait for each other, leading to a delay before one of them times out.
6198 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6199 maintained 0.8.x compatibility because I don't think many are using it, and
6200 it is clearly obsolete.
6202 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6205 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6206 client certificate was expired. A simple patch fixes this, though I don't
6207 understand the full logic of why the verify callback is called multiple
6210 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6211 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6212 which causes problems with some clients (such as the Certicom SSL Plus
6213 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6214 disables the coutermeasure allowing Eudora to connect."
6216 38. Exim was not checking that a write() to a log file succeeded. This could
6217 lead to Bad Things if a log got too big, in particular if it hit a file
6218 size limit. Exim now panics and dies if it cannot write to a log file, just
6219 as it does if it cannot open a log file.
6221 39. Modified OS/Makefile-Linux so that it now contains
6223 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6225 The two -D definitions ensure that Exim is compiled with large file
6226 support, which makes it possible to handle log files that are bigger than
6229 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6230 instance) a domain was checked against a named list that involved a lookup,
6231 causing $domain_data to be set, then another domain was checked against the
6232 same list, then the first domain was re-checked, the value of $domain_data
6233 after the final check could be wrong. In particular, if the second check
6234 failed, it could be set empty. This bug probably also applied to
6237 41. The strip_trailing_dot option was not being applied to the address given
6238 with the -f command-line option.
6240 42. The code for reading a message's header from the spool was incrementing
6241 $received_count, but never initializing it. This meant that the value was
6242 incorrect (doubled) while delivering a message in the same process in which
6243 it was received. In the most common configuration of Exim, this never
6244 happens - a fresh exec is done - but it can happen when
6245 deliver_drop_privilege is set.
6247 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6248 it now includes up to 150 characters of the unexpected data in the log
6251 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6252 and building data strings. The size of both of these buffers was 10 000
6253 bytes - far larger than anybody would *ever* want, thought I. Needless to
6254 say, somebody hit the limit. I have increased the maximum line length to
6255 20 000 and the maximum data length of concatenated lines to 100 000. I have
6256 also fixed two bugs, because there was no checking on these buffers. Tsk,
6257 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6258 buffer is too small.
6260 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6261 lsearch lookups. Now it does.
6263 46. When parsing a route_list item in a manualroute router, a fixed-length
6264 buffer was used for the list of hosts. I made this 1024 bytes long,
6265 thinking that nobody would ever have a list of hosts that long. Wrong.
6266 Somebody had a whole pile of complicated expansion conditions, and the
6267 string was silently truncated, leading to an expansion error. It turns out
6268 that it is easier to change to an unlimited length (owing to other changes
6269 that have happened since this code was originally written) than to build
6270 structure for giving a limitation error. The length of the item that
6271 expands into the list of hosts is now unlimited.
6273 47. The lsearch lookup could not handle data where the length of text line was
6274 more than 4095 characters. Such lines were truncated, leading to shortened
6275 data being returned. It should now handle lines of any length.
6277 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6278 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6281 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6282 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6283 no longer happens in comment lines. A list of replacements is now placed
6284 at the head of all of the source files, except those whose only change is
6285 to replace PERL_COMMAND in the very first #! line.
6287 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6288 messages on the queue, with a bottom-up merge sort, using code contributed
6289 by Michael Haardt. This should make operations like -bp somewhat faster on
6290 large queues. It won't affect queue runners, except when queue_run_in_order
6293 51. Installed eximstats 1.31 in the distribution.
6295 52. Added support for SRV lookups to the dnslookup router.
6297 53. If an ACL referred to $message_body or $message_body_end, the value was not
6298 reset for any messages that followed in the same SMTP session.
6300 54. The store-handling optimization for building very long strings was not
6301 differentiating between the different store pools. I don't think this
6302 actually made any difference in practice, but I've tidied it.
6304 55. While running the routers to verify a sender address, $sender_address
6305 was still set to the sender address. This is wrong, because when routing to
6306 send a bounce to the sender, it would be empty. Therefore, I have changed
6307 it so that, while verifying a sender address, $sender_address is set to <>.
6308 (There is no change to what happens when verifying a recipient address.)
6310 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6311 target A or AAAA records (if not already returned) without resetting the
6312 qualify_single or search_parents options of the DNS resolver. These are
6313 inappropriate in this case because the targets of MX and SRV records must
6314 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6315 target that, when qualified, matched something in the local domain. These
6316 two options are now turned off when doing these lookups.
6318 57. It seems that at least some releases of Reiserfs (which does not have the
6319 concept of a fixed number of inodes) returns zero and not -1 for the
6320 number of available inodes. This interacted badly with check_spool_inodes,
6321 which assumed that -1 was the "no such thing" setting. What I have done is
6322 to check that the total number of inodes is greater than zero before doing
6323 the test of how many are available.
6325 58. When a "warn" ACL statement has a log_message modifier, the message is
6326 remembered, and not repeated. This is to avoid a lot of repetition when a
6327 message has many recipients that cause the same warning to be written.
6328 However, Exim was preserving the list of already written lines for an
6329 entire SMTP session, which doesn't seem right. The memory is now reset if a
6330 new message is started.
6332 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6333 debugging output unless log_rewrite was also set.
6335 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6336 of (int)(handle) when we know that handle contains (void *)(-1).
6338 61. The Exim daemon panic-logs an error return when it closes the incoming
6339 connection. However "connection reset by peer" seems to be common, and
6340 isn't really an error worthy of noting specially, so that particular error
6343 62. When Exim is trying to find all the local interfaces, it used to panic and
6344 die if the ioctl to get the interface flags failed. However, it seems that
6345 on at least one OS (Solaris 9) it is possible to have an interface that is
6346 included in the list of interfaces, but for which you get a failure error
6347 for this call. This happens when the interface is not "plumbed" into a
6348 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6349 failure of the "get flags" call assumes that the interface is down.
6351 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6352 makes life easier for people who are doing arithmetic on fields extracted
6353 from dates, where you often get leading zeros that should not be
6354 interpreted as octal.
6356 64. Added qualify_domain to the redirect router, to override the global
6359 65. If a pathologically long header line contained very many addresses (the
6360 report of this problem mentioned 10 000) and each of them was rewritten,
6361 Exim could use up a very large amount of memory. (It kept on making new
6362 copies of the header line as it rewrote, and never released the old ones.)
6363 At the expense of a bit more processing, the header rewriting function has
6364 been changed so that it no longer eats memory in this way.
6366 66. The generation of the Received: header has been moved from the time that a
6367 message starts to be received, to the time that it finishes. The timestamp
6368 in the Received: header should now be very close to that of the <= log
6369 line. There are two side-effects of this change:
6371 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6372 logged header lines no longer include the local Received: line, because
6373 it has not yet been created. The same applies to a copy of the message
6374 that is returned to a non-SMTP sender when a message is rejected.
6376 (b) When a filter file is tested using -bf, no additional Received: header
6377 is added to the test message. After some thought, I decided that this
6380 This change does not affect the value of $received_for. It is still set
6381 after address rewriting, but before local_scan() is called.
6383 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6385 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6386 gave an unhelpful panic error message, and a defer error. I have managed to
6387 change this behaviour so that it now rejects any supplied certificate,
6388 which seems right, as the list of acceptable certificates is empty.
6390 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6391 gave an unhelpful defer error. I have not managed to make this reject any
6392 supplied certificates, but the error message it gives is "no certificate
6393 supplied", which is not helpful.
6395 70. exigrep's output now also includes lines that are not associated with any
6396 message, but which match the given pattern. Implemented by a patch from
6397 Martin Sluka, which also tidied up the Perl a bit.
6399 71. Recipient callout verification, like sender verification, was using <> in
6400 the MAIL FROM command. This isn't really the right thing, since the actual
6401 sender may affect whether the remote host accepts the recipient or not. I
6402 have changed it to use the actual sender in the callout; this means that
6403 the cache record is now keyed on a recipient/sender pair, not just the
6404 recipient address. There doesn't seem to be a real danger of callout loops,
6405 since a callout by the remote host to check the sender would use <>.
6406 [SEE ABOVE: changed after hitting problems.]
6408 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6409 temporary errors. However, in the case of such a code being given after
6410 the end of a data transmission (i.e. after ".") Exim was failing to write
6411 a retry record for the message. (Yes, there was some broken host that was
6412 actually sending 8xx at this point.)
6414 73. An unknown lookup type in a host list could cause Exim to panic-die when
6415 the list was checked. (An example that provoked this was putting <; in the
6416 middle of a list instead of at the start.) If this happened during a DATA
6417 ACL check, a -D file could be left lying around. This kind of configuration
6418 error no longer causes Exim to die; instead it causes a defer error. The
6419 incident is still logged to the main and panic logs.
6421 74. Buglet left over from Exim 3 conversion. The message "too many messages
6422 in one connection" was written to the rejectlog but not the mainlog, except
6423 when address rewriting (yes!) was being logged.
6425 75. Added write_rejectlog option.
6427 76. When a system filter was run not as root (that is, when system_filter_user
6428 was set), the values of the $n variables were not being returned to the
6429 main process; thus, they were not subsequently available in the $sn
6432 77. Added +return_path_on_delivery log selector.
6434 78. A connection timeout was being treated differently from recipients deferred
6435 when testing hosts_max_try with a message that was older than the host's
6436 retry timeout. (The host should not be counted, thus allowing all hosts to
6437 be tried at least once before bouncing.) This may have been the cause of an
6438 occasionally reported bug whereby a message would remain on the queue
6439 longer than the retry timeout, but would be bounced if a delivery was
6440 forced. I say "may" because I never totally pinned down the problem;
6441 setting up timeout/retry tests is difficult. See also the next item.
6443 79. The ultimate address timeout was not being applied to errors that involved
6444 a combination of host plus message (for example, a timeout on a MAIL
6445 command). When an address resolved to a number of possible hosts, and they
6446 were not all tried for each delivery (e.g. because of hosts_max_try), a
6447 message could remain on the queue longer than the retry timeout.
6449 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6452 81. Fixed an obscure SMTP outgoing bug which required at least the following
6453 conditions: (a) there was another message waiting for the same server;
6454 (b) the server returned 5xx to all RCPT commands in the first message so
6455 that the message was not completed; (c) the server dropped the connection
6456 or gave a negative response to the RSET that Exim sends to abort the
6457 transaction. The observed case was a dropped connection after DATA that had
6458 been sent in pipelining mode. That is, the server had advertised PIPELINING
6459 but was not implementing it correctly. The effect of the bug was incorrect
6460 behaviour, such as trying another host, and this could lead to a crash.
6466 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6467 and daemon.c were passed as pointers to ints; they should have been
6468 pointers to socklen_t variables (which are typically unsigned ints).
6470 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6473 3. Fixed a really odd bug that affected only the testing scheme; patching a
6474 certain fixed string in the binary changed the value of another string that
6475 happened to be identical to the end of the original first string.
6477 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6478 name", it returns that address as the IP address. On some operating
6479 systems (e.g. Solaris), it also passes back the IP address string as the
6480 "host name". However, on others (e.g. Linux), it passes back an empty
6481 string. Exim wasn't checking for this, and was changing the host name to an
6482 empty string, assuming it had been canonicalized.
6484 5. Although rare, it is permitted to have more than one PTR record for a given
6485 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6486 all the names associated with an address, because they do in Solaris.
6487 However, it seems that they do not in Linux for data that comes from the
6488 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6489 I found this out when I moved to a new Linux workstation and tried to run
6490 the Exim test suite.
6492 To get round this problem I have changed the code so that it now does its
6493 own call to the DNS to look up PTR records when searching for a host name.
6494 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6495 addresses that are only in /etc/hosts are still found.
6497 This behaviour is, however, controlled by an option called host_lookup_
6498 order, which defaults to "bydns:byaddr". If people want to use the other
6499 order, or indeed, just use one or the other means of lookup, they can
6500 specify it in this variable.
6502 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6503 some operating systems, this comes back from gethostbyaddr() as an empty
6504 string, and this is what Exim used to test for. However, it seems that in
6505 other systems, "." is yielded. Exim now tests for this case too.
6507 7. The values of check_spool_space and check_log_space are now held internally
6508 as a number of kilobytes instead of an absolute number of bytes. If a
6509 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6510 kilobyte. This means that much larger values can be stored.
6512 8. Exim monitor: an attempt to get the action menu when not actually pointing
6513 at a message produces an empty menu entitled "No message selected". This
6514 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6515 no entries in it ("Shell widget menu has zero width and/or height"). So I
6516 have added a single, blank menu entry in this case.
6518 9. Added ${quote_local_part.
6520 10. MIME decoding is now applied to the contents of Subject: header lines when
6523 11. Now that a reference to $sender_host_address automatically causes a reverse
6524 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6525 host lookup before query-style lookups in lists that might use this
6526 variable. This has therefore been abolished, and the "net-" prefix is no
6527 longer necessary for query-style lookups.
6529 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6530 have been a typo for LFLAGS, so it has been changed.
6532 13. The install script calls Exim with "-C /dev/null" in order to find the
6533 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6534 to be output. However, since Exim outputs its version number before the
6535 error, it didn't break the script. It just looked ugly. I fixed this by
6536 always allowing "-C /dev/null" if the caller is root.
6538 14. Ignore overlarge ACL variable number when reading spool file - insurance
6539 against a later release with more variables having written the file.
6541 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6542 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6543 this, as well as the form without the "IPv6" on the front.
6545 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6546 OS/Makefile-Darwin file.
6548 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6549 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6551 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6552 variable. However, some OS use ints for inodes. I've added cast to long int
6553 to get rid of the compiler warning.
6555 19. I had forgotten to lock out "/../" in configuration file names when
6556 ALT_CONFIG_PREFIX was set.
6558 20. Routers used for verification do not need to specify transports. However,
6559 if such a router generated a host list, and callout was configured, Exim
6560 crashed, because it could not find a port number from the (non-existent)
6561 transport. It now assumes port 25 in this circumstance.
6563 21. Added the -t option to exigrep.
6565 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6566 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6567 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6568 them is set, LOOKUP_LSEARCH is forced.
6570 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6572 24. Added sender and host information to the "rejected by local_scan()" log
6573 line; previously there was no indication of these.
6575 25. Added .include_if_exists.
6577 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6578 Linux. It turns out that not all file systems support this. Apparently some
6579 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6580 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6581 not supported on the file descriptor, is now ignored when Exim is trying to
6582 sync a directory. This applies only to Linux.
6584 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6586 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6587 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6590 29. Added support for maildirsize files from supplied patch (modified a bit).
6592 30. The use of :fail: followed by an empty string could lead Exim to respond to
6593 sender verification failures with (e.g.):
6595 550 Verification failed for <xxx>
6596 550 Sender verify failed
6598 where the first response line was missing the '-' that indicates it is not
6599 the final line of the response.
6601 31. The loop for finding the name of the user that called Exim had a hardwired
6602 limit of 10; it now uses the value of finduser_retries, which is used for
6603 all other user lookups.
6605 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6608 33. Exim was neglecting to zero errno before one call of strtol() when
6609 expanding a string and expecting an integer value. On some systems this
6610 resulted in spurious "integer overflow" errors. Also, it was casting the
6611 result into an int without checking.
6613 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6614 did not work. The code looks as if it has *never* worked, though it appears
6615 to have been documented since at least release 1.62. I have made it work.
6617 35. The "timeout_DNS" error in retry rules, also documented since at least
6618 1.62, also never worked. As it isn't clear exactly what this means, and
6619 clearly it isn't a major issue, I have abolished the feature by treating it
6620 as "timeout", and writing a warning to the main and panic logs.
6622 36. The display of retry rules for -brt wasn't always showing the error code
6625 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6626 timeout_connect_A, timeout_connect_MX.
6628 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6629 to the empty sender.
6631 39. The daemon was not analysing the content of -oX till after it had closed
6632 stderr and disconnected from the controlling terminal. This meant that any
6633 syntax errors were only noted on the panic log, and the return code from
6634 the command was 0. By re-arranging the code a little, I've made the
6635 decoding happen first, so such errors now appear on stderr, and the return
6636 code is 1. However, the actual setting up of the sockets still happens in
6637 the disconnected process, so errors there are still only recorded on the
6640 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6641 connections (as happens on some IP stacks) was logged at start up time as
6642 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6643 it from "IPv6 and IPv4", which means that two separate sockets are being
6646 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6647 says whether AF_INET or AF_INET6 was passed as an argument.
6649 42. Exiwhat output was messed up when time zones were included in log
6652 43. Exiwhat now gives more information about the daemon's listening ports,
6653 and whether -tls-on-connect was used.
6655 44. The "port" option of the smtp transport is now expanded.
6657 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6658 silently ignored. Now an error message is written to the main and panic
6661 46. There's a new ACL modifier called "logwrite" which writes to a log file
6662 as soon as it is encountered.
6664 47. Added $local_user_uid and $local_user_gid at routing time.
6666 48. Exim crashed when trying to verify a sender address that was being
6669 49. Exim was recognizing only a space character after ".include". It now also
6670 recognizes a tab character.
6672 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6673 extracting the relevant information from the specification. The man page no
6674 longer contains scrambled data for the -d option, and I've added a section
6675 at the front about calling Exim under different names.
6677 51. Added "extra_headers" argument to the "mail" command in filter files.
6679 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6682 53. Installed eximstats 1.29.
6684 54. Added transport_filter_timeout as a generic transport option.
6686 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6687 Cc: header lines. This was required by RFC 822, but it not required by RFC
6690 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6691 incoming messages that did not have them. Now it does so only if the
6692 message originates locally, that is, if there is no associated remote host
6693 address. When Resent- header lines are present, this applies to the Resent-
6694 lines rather than the non-Resent- lines.
6696 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6697 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6699 58. Messages for configuration errors now include the name of the main
6700 configuration file - useful now that there may be more than one file in a
6701 list (.included file names were always shown).
6703 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6704 for those rare installations that do not start the daemon as root or run it
6705 setuid root. I've cut out the call to initgroups() if the daemon is not
6708 60. The Exim user and group can now be bound into the binary as text strings
6709 that are looked up at the start of Exim's processing.
6711 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6713 62. Added $mailstore_basename variable.
6715 63. Installed patch to sieve.c from Michael Haardt.
6717 64. When Exim failed to open the panic log after failing to open the main log,
6718 the original message it was trying to log was written to stderr and debug
6719 output, but if they were not available (the usual case in production), it
6720 was lost. Now it is written to syslog before the two lines that record the
6721 failures to open the logs.
6723 65. Users' Exim filters run in subprocesses under the user's uid. It is
6724 possible for a "deliver" command or an alias in a "personal" command to
6725 provoke an address rewrite. If logging of address rewriting is configured,
6726 this fails because the process is not running as root or exim. There may be
6727 a better way of dealing with this, but for the moment (because 4.30 needs
6728 to be released), I have disabled address rewrite logging when running a
6729 filter in a non-root, non-exim process.
6735 1. The buildconfig auxiliary program wasn't quoting the value set for
6736 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6737 not defined. This bug was masked in 4.22 by the effect that was fixed in
6740 2. Some messages that were rejected after a message id was allocated were
6741 shown as "incomplete" by exigrep. It no longer does this for messages that
6742 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6744 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6745 have allow_domain_literals set, the ID did not get logged in the <= line.
6746 Domain literals are now always recognized in Message-ID: header lines.
6748 4. The first argument for a ${extract expansion item is the key name or field
6749 number. Leading and trailing spaces in this item were not being ignored,
6750 causing some misleading effects.
6752 5. When deliver_drop_privilege was set, single queue runner processes started
6753 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6754 same command in the process it spins off) were not dropping privilege.
6756 6. When the daemon running as "exim" started a queue runner, it always
6757 re-executed Exim in the spun-off process. This is a waste of effort when
6758 deliver_drop_privilege is set. The new process now just calls the
6759 queue-runner function directly.
6765 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6768 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6769 ignored. Though the use of -oP was forcing the writing of a pid file, it
6770 was always written to the default place.
6772 3. If the message "no IP address found for host xxxx" is generated during
6773 incoming verification, it is now followed by identification of the incoming
6774 connection (so you can more easily find what provoked it).
6776 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6778 5. Added some features to "harden" Exim a bit more against certain attacks:
6780 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6781 be put in Local/Makefile. This is like the never_users runtime option,
6782 but it cannot be overridden. The default setting is "root".
6784 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6785 prefix string with which any file named in a -C command line option
6788 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6789 is retained for -C and -D only if the caller of Exim is root. Without
6790 it, the exim user may also use -C and -D and retain privilege.
6792 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6793 command line option is disabled.
6795 6. Macro names set by the -D option must start with an upper case letter, just
6796 like macro names defined in the configuration file.
6798 7. Added "dereference=" facility to LDAP.
6800 8. Two instances of the typo "uknown" in the source files are fixed.
6802 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6803 the Configure-Makefile script screwed up while processing it.
6805 10. Incorporated PCRE 4.4.
6807 11. The SMTP synchronization check was not operating right at the start of an
6808 SMTP session. For example, it could not catch a HELO sent before the client
6809 waited for the greeting. There is now a check for outstanding input at the
6810 point when the greeting is written. Because of the duplex, asynchronous
6811 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6812 way, but not yet received, when the check is performed.
6814 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6815 on TCP/IP sockets, because this apparently causes some broken clients to
6818 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6819 unchanged) from the Cygwin maintainer.
6821 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6822 was supported instead of testing for mbx. Effectively a typo.
6824 15. The spa authenticator server code was not checking that the input it
6825 received was valid base64.
6827 16. The debug output line for the "set" modifier in ACLs was not showing the
6828 name of the variable that was being set.
6830 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6832 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6833 lookup on its own. Something else was needed to trigger the lookup. For
6834 example, a match in host_lookup or the need for a host name in a host list.
6835 Now, if $sender_host_name is referenced and the host name has not yet been
6836 looked up, a lookup is performed. If the lookup fails, the variable remains
6837 empty, and $host_lookup_failed is set to "1".
6839 19. Added "eqi" as a case-independent comparison operator.
6841 20. The saslauthd authentication condition could segfault if neither service
6842 nor realm was specified.
6844 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6845 error message that was logged was misleading, and incoming SMTP
6846 connections were dropped. The message is now more accurate, and temporary
6847 errors are given to SMTP connections.
6849 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6850 (except RSET) with a 421 error, until QUIT is received. However, it was
6851 failing to send a response to QUIT.
6853 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6854 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6855 ACL is now run after the helo_try_verify_hosts code.
6857 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6858 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6859 case-independent, so other case variants are also recognized). Apparently
6860 some systems use these upper case variants.
6862 25. If more than two messages were waiting for the same host, and a transport
6863 filter was specified for the transport, Exim sent two messages over the
6864 same TCP/IP connection, and then failed with "socket operation on non-
6865 socket" when it tried to send the third.
6867 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6869 27. The extern definition of crypt16() in expand.c was not being excluded when
6870 the OS had its own crypt16() function.
6872 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6873 as a preferred synonym for return_size_limit, both as an option and as an
6876 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6878 30. Changed the default configuration ACL to relax the local part checking rule
6879 for addresses that are not in any local domains. For these addresses,
6880 slashes and pipe symbols are allowed within local parts, but the sequence
6881 /../ is explicitly forbidden.
6883 31. SPA server authentication was not clearing the challenge buffer before
6886 32. log_message in a "warn" ACL statement was writing to the reject log as
6887 well as to the main log, which contradicts the documentation and doesn't
6888 seem right (because no rejection is happening). So I have stopped it.
6890 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6891 However, I am unable to do any testing of this.
6893 34. Fixed an infelicity in the appendfile transport. When checking directories
6894 for a mailbox, to see if any needed to be created, it was accidentally
6895 using path names with one or more superfluous leading slashes; tracing
6896 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6898 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6899 contents are added to the log line that is written for every discarded
6900 recipient. (Previously a log_message setting was ignored.)
6902 36. The ${quote: operator now quotes the string if it is empty.
6904 37. The install script runs exim in order to find its version number. If for
6905 some reason other than non-existence or emptiness, which it checks, it
6906 could not run './exim', it was installing it with an empty version number,
6907 i.e. as "exim-". This error state is now caught, and the installation is
6910 38. An argument was missing from the function that creates an error message
6911 when Exim fails to connect to the socket for saslauthd authentication.
6912 This could cause Exim to crash, or give a corrupted message.
6914 39. Added isip, isip4, and isip6 to ${if conditions.
6916 40. The ACL variables $acl_xx are now saved with the message, and can be
6917 accessed later in routers, transports, and filters.
6919 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6920 strings in the file are not string-expanded.
6922 42. If a MAIL command specified a SIZE value that was too large to fit into an
6923 int variable, the check against message_size_limit failed. Such values are
6924 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6925 day this will have to be increased, but I don't think I want to be around
6926 when emails are that large.
6933 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6934 iconv() is not standard in FreeBSD.
6936 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6937 IPv6 enabled. The observed symptom was a segmentation fault on return from
6938 the function os_common_find_running_interfaces() in src/os.c.
6940 3. In the check_special_case() function in daemon.c I had used "errno" as an
6941 argument name, which causes warnings on some systems. This was basically a
6942 typo, since it was named "eno" in the comments!
6944 4. The code that waits for the clock to tick (at a resolution of some fraction
6945 of a second) so as to ensure message-id uniqueness was always waiting for
6946 at least one whole tick, when it could have waited for less. [This is
6947 almost certainly not relevant at current processor speeds, where it is
6948 unlikely to ever wait at all. But we try to future-proof.]
6950 5. The function that sleeps for a time interval that includes fractions of a
6951 second contained a race. It did not block SIGALRM between setting the
6952 timer, and suspending (a couple of lines later). If the interval was short
6953 and the sigsuspend() was delayed until after it had expired, the suspension
6954 never ended. On busy systems this could lead to processes getting stuck for
6957 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6958 process, before it forks any delivery processes. The open lookup caching
6959 mechanism meant that the open file or database connection was passed into
6960 the delivery process. The problem was that delivery processes always tidy
6961 up cached lookup data. This could cause a problem for the next delivery
6962 process started by the queue runner, because the external queue runner
6963 process does not know about the closure. So the next delivery process
6964 still has data in the lookup cache. In the case of a file lookup, there was
6965 no problem because closing a file descriptor in a subprocess doesn't affect
6966 the parent. However, if the lookup was caching a connection to a database,
6967 the connection was closed, and the second delivery process was likely to
6968 see errors such as "PGSQL: query failed: server closed the connection
6969 unexpectedly". The problem has been fixed by closing all cached lookups
6970 in a queue runner before running a delivery process.
6972 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6973 seem to have the "const" qualifier which it has on other OS. I've
6976 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6977 *of the same type* (client or server) with the same public name that an
6978 error should be diagnosed.
6980 9. When Exim looked up a host name for an IP address, but failed to find the
6981 original IP address when looking up the host name (a safety check), it
6982 output the message "<ip address> does not match any IP for NULL", which was
6983 confusing, to say the least. The bug was that the host name should have
6984 appeared instead of "NULL".
6986 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6987 user that is built into the binary, and the -C or -D options is used, root
6988 privilege is dropped before the configuration file is read. In addition,
6989 logging is switched to stderr instead of the normal log files. If the
6990 configuration then re-defines the Exim user, the unprivileged environment
6991 is probably not what is expected, so Exim logs a panic warning message (but
6994 However, if deliver_drop_privilege is set, the unprivileged state may well
6995 be exactly what is intended, so the warning has been cut out in that case,
6996 and Exim is allowed to try to write to its normal log files.
7002 1. smtp_return_error_details was not giving details for temporary sender
7003 or receiver verification errors.
7005 2. Diagnose a configuration error if two authenticators have the same public
7008 3. Exim used not to create the message log file for a message until the first
7009 delivery attempt. This could be confusing when incoming messages were held
7010 for policy or load reasons. The message log file is now created at the time
7011 the message is received, and an initial "Received" line is written to it.
7013 4. The automatically generated man page for command line options had a minor
7014 bug that caused no ill effects; however, a more serious problem was that
7015 the procedure for building the man page automatically didn't always
7016 operate. Consequently, release 4.20 contains an out-of-date version. This
7017 shouldn't happen again.
7019 5. When building Exim with embedded Perl support, the script that builds the
7020 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7021 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7023 6. The freeze_tell option was not being used for messages that were frozen on
7024 arrival, either by an ACL or by local_scan().
7026 7. Added the smtp_incomplete_transaction log selector.
7028 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7029 was accepting AUTH without a new EHLO.
7031 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7032 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7035 10. Logging of TCP/IP connections (when configured) now happens in the main
7036 daemon process instead of the child process, so that the TCP/IP connection
7037 count is more accurate (but it can never be perfect).
7039 11. The use of "drop" in a nested ACL was not being handled correctly in the
7040 outer ACL. Now, if condition failure induced by the nested "drop" causes
7041 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7042 or "require"), the connection is dropped.
7044 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7045 that yield "discard" can now be used with an "accept" or a "discard" verb,
7046 but an error is generated for any others (because I can't see a useful way
7047 to define what should happen).
7049 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7050 are now processed in the same way as lines in the Exim configuration file.
7051 In particular, continuation lines are supported.
7053 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7055 15. Added -ti meaning -t -i.
7057 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7058 domains, and warn by logging if others are found.
7060 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7061 returned from GIFCONF when Exim is trying to find the list of interfaces on
7062 a host. The code in os.c has been modified to copy each ifreq to an aligned
7063 structure in all cases.
7065 Also, in some cases, the returned ifreq's were being copied to a 'struct
7066 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7067 means the last couple of bytes of an IPv6 address could be chopped if the
7068 ifreq contained only a normal sockaddr (14 bytes storage).
7070 18. Named domain lists were not supported in the hosts_treat_as_local option.
7071 An entry such as +xxxx was not recognized, and was treated as a literal
7074 19. Ensure that header lines added by a DATA ACL are included in the reject log
7075 if the ACL subsequently rejects the message.
7077 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7078 MD5 (which is deprecated).
7080 21. When testing a filter file using -bf, Exim was writing a message when it
7081 took the sender from a "From " line in the message, but it was not doing so
7082 when it took $return_path from a Return-Path: header line. It now does.
7084 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7085 with a valid header line field name (a series of printing characters
7086 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7088 23. Changed "disc" in the source to "disk" to conform to the documentation and
7089 the book and for uniformity.
7091 24. Ignore Sendmail's -Ooption=value command line item.
7093 25. When execve() failed while trying to run a command in a pipe transport,
7094 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7095 could be confused with a return value of 69 from the command itself. This
7096 has been changed to 127, the value the shell returns if it is asked to run
7097 a non-existent command. The wording for the related log line suggests a
7098 non-existent command as the problem.
7100 26. If received_header_text expands to an empty string, do not add a Received:
7101 header line to the message. (Well, it adds a token one on the spool, but
7102 marks it "old" so that it doesn't get used or transmitted.)
7104 27. Installed eximstats 1.28 (addition of -nt option).
7106 28. There was no check for failure on the call to getsockname() in the daemon
7107 code. This can fail if there is a shortage of resources on the system, with
7108 ENOMEM, for example. A temporary error is now given on failure.
7110 29. Contrary to the C standard, it seems that in some environments, the
7111 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7112 program. Exim now does this explicitly; it affects the formatting of
7113 timestamps using strftime().
7115 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7116 complaints. I've now initialized all the variables, to avoid this.
7118 32. Header lines added by a system filter were not being "seen" during
7119 transport-time rewrites.
7121 33. The info_callback() function passed to OpenSSL is set up with type void
7122 (*)(SSL *, int, int), as described somewhere. However, when calling the
7123 function (actually a macro) that sets it up, the type void(*)() is
7124 expected. I've put in a cast to prevent warnings from picky compilers.
7126 34. If a DNS black list lookup found a CNAME record, but there were no A
7127 records associated with the domain it pointed at, Exim crashed.
7129 35. If a DNS black list lookup returned more than one A record, Exim ignored
7130 all but the first. It now scans all returned addresses if a particular IP
7131 value is being sought. In this situation, the contents of the
7132 $dnslist_value variable are a list of all the addresses, separated by a
7135 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7136 to accept a host name and all its aliases if the forward lookup for any of
7137 them yielded the IP address of the incoming connection. Now it accepts only
7138 those names whose forward lookup yields the correct IP address. Any other
7139 names are discarded. This closes a loophole whereby a rogue DNS
7140 administrator could create reverse DNS records to break through a
7141 wildcarded host restriction in an ACL.
7143 37. If a user filter or a system filter that ran in a subprocess used any of
7144 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7145 the wrong values were passed to the pipe command ($thisaddress had the
7146 value of $0, $0 had the value of $1, etc). This bug was introduced by
7147 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7149 38. Improved the line breaking for long SMTP error messages from ACLs.
7150 Previously, if there was no break point between 40 and 75 characters, Exim
7151 left the rest of the message alone. Two changes have been made: (a) I've
7152 reduced the minimum length to 35 characters; (b) if it can't find a break
7153 point between 35 and 75 characters, it looks ahead and uses the first one
7154 that it finds. This may give the occasional overlong line, but at least the
7155 remaining text gets split now.
7157 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7158 file descriptors might be low, and that setting 1000 would always raise it.
7159 It turns out that in some environments, the limit is already over 1000 and
7160 that lowering it causes trouble. So now Exim takes care not to decrease it.
7162 40. When delivering a message, the value of $return_path is set to $sender_
7163 address at the start of routing (routers may change the value). By an
7164 oversight, this default was not being set up when an address was tested by
7165 -bt or -bv, which affected the outcome if any router or filter referred to
7168 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7169 log only when "message" or "log_message" are set. However, if one of the
7170 conditions was an address verification, or a call to a nested ACL, the
7171 messages generated by the underlying test were being passed through. This
7172 no longer happens. The underlying message is available in $acl_verify_
7173 message for both "message" and "log_message" expansions, so it can be
7174 passed through if needed.
7176 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7177 new expansion $bh_ to give the encoded byte string without charset
7178 translation. Translation happens only if iconv() is available; HAVE_ICONV
7179 indicates this at build time. HEADERS_CHARSET gives the charset to
7180 translate to; headers_charset can change it in the configuration, and
7181 "headers charset" can change it in an individual filter file.
7183 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7184 that creates RFC 2047 encoded "words" labels them as that charset instead
7185 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7186 expansion operator; (ii) when Exim creates a From: line for a local
7187 message; (iii) when a header line is rewritten to include a "phrase" part.
7189 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7190 buggy, causing it to skip the first lines of messages whose message ID
7191 ended in 'D'. This would not have bitten before Exim release 4.14, because
7192 message IDs were unlikely to end in 'D' before then. The effect was to have
7193 incorrect size information for certain domains.
7195 45. #include "config.h" was missing at the start of the crypt16.c module. This
7196 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7199 46. If there was a timeout during a "random" callout check, Exim treated it as
7200 a failure of the random address, and carried on sending RSET and the real
7201 address. If the delay was just some slowness somewhere, the response to the
7202 original RCPT would be taken as a response to RSET and so on, causing
7203 mayhem of various kinds.
7205 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7206 when I implemented it. It didn't allow for the fact that some option values
7207 may legitimately be negative (e.g. size_addition), and it didn't even do
7208 the right test for positive values.
7210 48. Domain names in DNS records are case-independent. Exim always looks them up
7211 in lower case. Some resolvers return domain names in exactly the case they
7212 appear in the zone file, that is, they may contain uppercase letters. Not
7213 all resolvers do this - some return always lower case. Exim was treating a
7214 change of case by a resolver as a change of domain, similar to a widening
7215 of a domain abbreviation. This triggered its re-routing code and so it was
7216 trying to route what was effectively the same domain again. This normally
7217 caused routing to fail (because the router wouldn't handle the domain
7218 twice). Now Exim checks for this case specially, and just changes the
7219 casing of the domain that it ultimately uses when it transmits the message
7222 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7225 50. If a filter generated a file delivery with a non-absolute name (possible if
7226 no home directory exists for the router), the forbid_file option was not
7229 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7230 the existing equality matching.
7232 52. Exim was using ints instead of ino_t variables in some places where it was
7233 dealing with inode numbers.
7235 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7236 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7237 called TMPDIR, and if it finds it is different, it changes its value.
7239 54. The smtp_printf() function is now made available to local_scan() so
7240 additional output lines can be written before returning. There is also an
7241 smtp_fflush() function to enable the detection of a dropped connection.
7242 The variables smtp_input and smtp_batched_input are exported to
7245 55. Changed the default runtime configuration: the message "Unknown user"
7246 has been removed from the ACL, and instead placed on the localuser router,
7247 using the cannot_route_message feature. This means that any verification
7248 failures that generate their own messages won't get overridden. Similarly,
7249 the "Unrouteable address" message that was in the ACL for unverifiable
7250 relay addresses has also been removed.
7252 56. Added hosts_avoid_esmtp to the smtp transport.
7254 57. The exicyclog script was not checking for the esoteric option
7255 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7256 will work only if exicyclog is run under the appropriate euid.
7258 58. Following a discussion on the list, the rules by which Exim recognises line
7259 endings on incoming messages have been changed. The -dropcr and drop_cr
7260 options are now no-ops, retained only for backwards compatibility. The
7261 following line terminators are recognized: LF CRLF CR. However, special
7262 processing applies to CR:
7264 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7265 nor a local message in the state where . is a terminator.
7267 (ii) If a bare CR is encountered in a header line, an extra space is added
7268 after the line terminator so as not to end the header. The reasoning
7269 behind this is that bare CRs in header lines are most likely either
7270 to be mistakes, or people trying to play silly games.
7272 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7273 was being incorrectly given as 18 bytes larger than it should have been.
7274 This is a VOB (very old bug).
7276 60. This may never have affected anything current, but just in case it has:
7277 When the local host is found other than at the start of a list of hosts,
7278 the local host, those with the same MX, and any that follow, are discarded.
7279 When the list in question was part of a longer list of hosts, the following
7280 hosts (not currently being processed) were also being discarded. This no
7281 longer happens. I'm not sure if this situation could ever has previously
7284 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7287 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7288 header. This is something that is recommended in a new Internet Draft, and
7289 is something that is documented as being done by Sendmail. There are two
7290 possible values. For messages generated by the autoreply transport, Exim
7293 Auto-Submitted: auto-replied
7295 whereas for all other generated messages (e.g. bounces) it adds
7297 Auto-Submitted: auto-generated
7299 63. The "personal" condition in filters now includes a test for the
7300 Auto-Submitted: header. If it contains the string "auto-" the message it
7301 not considered personal.
7303 64. Added rcpt_include_affixes as a generic transport option.
7305 65. Added queue_only_override (default true).
7307 66. Added the syslog_duplication option.
7309 67. If what should have been the first header line of a message consisted of
7310 a space followed by a colon, Exim was mis-interpreting it as a header line.
7311 It isn't of course - it is syntactically invalid and should therefore be
7312 treated as the start of the message body. The misbehaviour could have
7313 caused a number of strange effects, including loss of data in subsequent
7314 header lines, and spool format errors.
7316 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7317 client host had authenticated. This control can now be exercised by an ACL
7318 for more flexibility.
7320 69. By default, callouts do not happen when testing with -bh. There is now a
7321 variant, -bhc, which does actually run the callout code, including
7322 consulting and updating the callout cache.
7324 70. Added support for saslauthd authentication, courtesy of Alexander
7327 71. If statvfs() failed on the spool or log directories while checking their
7328 size for availability, Exim confusingly gave the error "space shortage".
7329 Furthermore, in debugging mode it crashed with a floating point exception.
7330 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7331 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7332 serious problem, Exim now writes to the main and panic logs when this
7333 happens, with details of the failure. It then refuses to accept the
7334 incoming message, giving the message "spool directory problem" or "log
7335 directory problem" with a 421 code for SMTP messages.
7337 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7338 0, 1, and 2 exist, because some OS complain for execs without them (see
7339 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7340 descriptors. However, the code omitted to check that the open succeeded,
7341 causing mysterious errors if for some reason the permissions on /dev/null
7342 got screwed. Now Exim writes a message to the main and panic logs, and
7343 bombs out if it can't open /dev/null.
7345 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7346 interact so that it is all more flexible. It is supposed to remain
7347 backwards compatible. Also added extra_local_interfaces.
7349 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7350 to bomb out with an assertion failure - to the client this appears as a
7351 connection drop. This problem occurs in the part of the code that was taken
7352 from the Samba project. Fortunately, the assertion is in a very simple
7353 function, so I have fixed this by reproducing the function inline in the
7354 one place where it is called, and arranging for authentication to fail
7355 instead of killing the process with assert().
7357 75. The SPA client code was not working when the server requested OEM rather
7358 than Unicode encoding.
7360 76. Added code to make require_files with a specific uid setting more usable in
7361 the case where statting the file as root fails - usually a non-root-mounted
7362 NFS file system. When this happens and the failure is EACCES, Exim now
7363 forks a subprocess and does the per-uid checking as the relevant uid.
7365 77. Added process_log_path.
7367 78. If log_file_path was not explicitly set, a setting of check_log_space or
7368 check_log_inodes was ignored.
7370 79. If a space check for the spool or log partitions fails, the incident is now
7371 logged. Of course, in the latter case the data may get lost...
7373 80. Added the %p formatting code to string_format() so that it can be used to
7374 print addresses in debug_print(). Adjusted all the address printing in the
7375 debugging in store.c to use %p rather than %d.
7377 81. There was a concern that a line of code in smtp_in.c could overflow a
7378 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7379 initially expressed, the concern was not well-founded, because trailing
7380 spaces are removed early. However, if the trailing spaces were followed by
7381 a NULL, they did not get removed, so the overflow was possible. Two fixes
7384 (a) I re-wrote the offending code in a cleaner fashion.
7385 (b) If an incoming SMTP command contains a NULL character, it is rejected
7388 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7389 runs initgroups(), so that if the Exim user is in any additional groups,
7390 they will be used during message reception.
7396 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob