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/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
12 non-signal-safe functions being used.
14 JH/03 Bug 2269: When presented with a received message having a stupidly large
15 number of DKIM-Signature headers, disable DKIM verification to avoid
16 a resource-consumption attack. The limit is set at twenty.
18 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
19 files in the spool were present and unlocked. A queue-runner could spot
20 them, resulting in a duplicate delivery. Fix that by doing the unlock
21 after the unlink. Investigation by Tim Stewart.
23 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
24 a queue-runner could start a delivery while other operations were ongoing.
25 Cutthrough delivery was a common victim, resulting in duplicate delivery.
26 Found and investigated by Tim Stewart. Fix by using the open message data
27 file handle rather than opening another, and not locally closing it (which
28 releases a lock) for that case, while creating the temporary .eml format
29 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
31 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
34 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
35 Previously this would segfault.
37 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
40 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
42 JH/16 Fix ARC verification to do AS checks in reverse order.
44 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
45 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
46 Previously the "utf8" would be re-prepended for every additional message.
48 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
49 one parent address was copied, and bogus data was used at delivery-logging
50 time. Either a crash (after delivery) or bogus log data could result.
51 Discovery and analysis by Tim Stewart.
53 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
54 The ignore_error flag wasn't being returned from the filter subprocess so
55 was not set for later routers. Investigation and fix by Matthias Kurz.
57 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
58 requiring a known-CA anchor certificate; make it now rely entirely on the
59 TLSA as an anchor. Checking the name on the leaf cert against the name
60 on the A-record for the host is still done for TA (but not for EE mode).
62 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
63 included in delivery lines for non-proxied connections, when compiled with
64 SUPPORT_SOCKS and running with proxy logging enabled.
66 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
67 copy a string over itself. The library routine is documented as not
68 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
74 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
75 When redis_servers is set to a list of > 1 element, and the Redis servers
76 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
77 case of MOVED into a DEFER case instead, thus moving the query onto the
78 next server in the list. For a cluster of N elements, all N servers must
79 be defined in redis_servers.
81 GF/02 Catch and remove uninitialized value warning in exiqsumm
82 Check for existence of @ARGV before looking at $ARGV[0]
84 JH/01 Replace the store_release() internal interface with store_newblock(),
85 which internalises the check required to safely use the old one, plus
86 the allocate and data copy operations duplicated in both (!) of the
89 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
90 modifier. This matches the restriction on the commandline.
92 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
93 Previously only the last row was returned.
95 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
96 we assumed that tags in the header were well-formed, and parsed the
97 element content after inspecting only the first char of the tag.
98 Assumptions at that stage could crash the receive process on malformed
101 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
102 While running the DKIM ACL we operate on the Permanent memory pool so that
103 variables created with "set" persist to the DATA ACL. Also (at any time)
104 DNS lookups that fail create cache records using the Permanent pool. But
105 expansions release any allocations made on the current pool - so a dnsdb
106 lookup expansion done in the DKIM ACL releases the memory used for the
107 DNS negative-cache, and bad things result. Solution is to switch to the
108 Main pool for expansions.
109 While we're in that code, add checks on the DNS cache during store_reset,
110 active in the testsuite.
111 Problem spotted, and debugging aided, by Wolfgang Breyha.
113 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
114 When none of the hosts presented to a transport match an already-open
115 connection, close it and proceed with the list. Previously we would
116 queue the message. Spotted by Lena with Yahoo, probably involving
119 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
120 Previously a spurious "250 OK id=" response was appended to the proper
123 JH/08 The "support for" informational output now, which built with Content
124 Scanning support, has a line for the malware scanner interfaces compiled
125 in. Interface can be individually included or not at build time.
127 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
128 by the template makefile "src/EDITME". The "STREAM" support for an older
129 ClamAV interface method is removed.
131 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
132 rows affected is given instead).
134 JH/11 The runtime Berkeley DB library version is now additionally output by
135 "exim -d -bV". Previously only the compile-time version was shown.
137 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
138 SMTP connection. Previously, when one had more receipients than the
139 first, an abortive onward connection was made. Move to full support for
140 multiple onward connections in sequence, handling cutthrough connection
141 for all multi-message initiating connections.
143 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
144 routers. Previously, a multi-recipient message would fail to match the
145 onward-connection opened for the first recipient, and cause its closure.
147 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
148 a timeout on read on a GnuTLS initiating connection, resulting in the
149 initiating connection being dropped. This mattered most when the callout
150 was marked defer_ok. Fix to keep the two timeout-detection methods
153 JH/15 Relax results from ACL control request to enable cutthrough, in
154 unsupported situations, from error to silently (except under debug)
155 ignoring. This covers use with PRDR, frozen messages, queue-only and
158 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
160 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
161 metadata, resulting in a crash in free().
163 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
164 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
165 Broken also in d185889f4, with init system revamp.
167 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
168 Previously we abruptly closed the connection after reading a malware-
169 found indication; now we go on to read the "scan ok" response line,
172 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
173 ACL. Previously, a crash would result.
175 JH/19 Speed up macro lookups during configuration file read, by skipping non-
176 macro text after a replacement (previously it was only once per line) and
177 by skipping builtin macros when searching for an uppercase lead character.
179 JH/20 DANE support moved from Experimental to mainline. The Makefile control
180 for the build is renamed.
182 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
183 was allocated for every new TLS startup, meaning one per message. Fix
184 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
186 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
187 reported the original. Fix to report (as far as possible) the ACL
188 result replacing the original.
190 JH/23 Fix memory leak during multi-message connections using STARTTLS under
191 OpenSSL. Certificate information is loaded for every new TLS startup,
192 and the resources needed to be freed.
194 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
196 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
199 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
200 DATA response info to the (existing) per-recipient response info for
201 the "C=" log element. It can have useful tracking info from the
202 destination system. Patch from Simon Arlott.
204 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
205 length value. Previously this would segfault.
207 HS/02 Support Avast multiline protoocol, this allows passing flags to
208 newer versions of the scanner.
210 JH/28 Ensure that variables possibly set during message acceptance are marked
211 dead before release of memory in the daemon loop. This stops complaints
212 about them when the debug_store option is enabled. Discovered specifically
213 for sender_rate_period, but applies to a whole set of variables.
214 Do the same for the queue-runner and queue-list loops, for variables set
215 from spool message files. Do the same for the SMTP per-message loop, for
216 certain variables indirectly set in ACL operations.
218 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
219 as a multi-recipient message from a mailinglist manager). The coding had
220 an arbitrary cutoff number of characters while checking for more input;
221 enforced by writing a NUL into the buffer. This corrupted long / fast
222 input. The problem was exposed more widely when more pipelineing of SMTP
223 responses was introduced, and one Exim system was feeding another.
224 The symptom is log complaints of SMTP syntax error (NUL chars) on the
225 receiving system, and refused recipients seen by the sending system
226 (propating to people being dropped from mailing lists).
227 Discovered and pinpointed by David Carter.
229 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
230 replaced by the ${authresults } expansion.
232 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
234 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
235 allows proper process termination in container environments.
237 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
238 Previously the "final dot" had a newline after it; ensure it is CR,LF.
240 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
241 and "err_perm", deprecated since 4.83 when the RFC-defined words
242 "temperror" and "permerror" were introduced.
244 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
245 transport-filters or DKIM-signing. The restriction was lost in the
246 consolidation of verify-callout and delivery SMTP handling.
247 Extend the restriction to also cover ARC-signing.
249 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
250 in defer=pass mode supply a 450 to the initiator. Previously the message
253 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
254 tls_require_ciphers is used as before.
256 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
257 "pass_unscanned". Only tmpfails from the scanner are written to
258 the paniclog, as they may require admin intervention (permission
259 denied, license issues). Other scanner errors (like decompression
260 bombs) do not cause a paniclog entry.
262 JH/36 Fix reinitialisation of DKIM logging variable between messages.
263 Previously it was possible to log spurious information in receive log
266 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
267 triggered odd behaviour from Outlook Express clients.
269 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
272 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
273 since the IETF WG has not yet settled on that versus the original
274 "bare" representation.
276 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
277 Previously the millisecond value corrupted the output.
278 Fix also for syslog_pid=no and log_selector +pid, for which the pid
279 corrupted the output.
285 JH/01 Rework error string handling in TLS interface so that the caller in
286 more cases is responsible for logging. This permits library-sourced
287 string to be attached to addresses during delivery, and collapses
288 pairs of long lines into single ones.
290 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
291 during configuration. Wildcards are allowed and expanded.
293 JH/02 Rework error string handling in DKIM to pass more info back to callers.
294 This permits better logging.
296 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
297 do not close it down and have the child transport start it up again on
298 the passed-on TCP connection. Instead, proxy the child (and any
299 subsequent ones) for TLS via a unix-domain socket channel. Logging is
300 affected: the continued delivery log lines do not have any DNSSEC, TLS
301 Certificate or OCSP information. TLS cipher information is still logged.
303 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
304 identical IP addresses on different listening ports. Will also affect
307 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
308 add noisy ifdef guards to special-case this sillyness.
309 Patch from Bernd Kuhls.
311 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
312 than 255 are no longer allowed.
314 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
315 Disable the session-cache too, which might reduce our load. Since we
316 currrectly use a new context for every connection, both as server and
317 client, there is no benefit for these.
318 GnuTLS appears to not support tickets server-side by default (we don't
319 call gnutls_session_ticket_enable_server()) but client side is enabled
320 by default on recent versions (3.1.3 +) unless the PFS priority string
323 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
324 <https://reproducible-builds.org/specs/source-date-epoch/>.
326 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
327 the check for any unsuccessful recipients did not notice the limit, and
328 erroneously found still-pending ones.
330 JH/08 Pipeline CHUNKING command and data together, on kernels that support
331 MSG_MORE. Only in-clear (not on TLS connections).
333 JH/09 Avoid using a temporary file during transport using dkim. Unless a
334 transport-filter is involved we can buffer the headers in memory for
335 creating the signature, and read the spool data file once for the
336 signature and again for transmission.
338 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
339 4.77 as the kernel support then wasn't solid, having issues in 64bit
340 mode. Now, it's been long enough. Add support for FreeBSD also.
342 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
343 case where the routing stage had gathered several addresses to send to
344 a host before calling the transport for the first, we previously failed
345 to close down TLS in the old transport process before passing the TCP
346 connection to the new process. The new one sent a STARTTLS command
347 which naturally failed, giving a failed delivery and bloating the retry
348 database. Investigation and fix prototype from Wolfgang Breyha.
350 JH/12 Fix check on SMTP command input synchronisation. Previously there were
351 false-negatives in the check that the sender had not preempted a response
352 or prompt from Exim (running as a server), due to that code's lack of
353 awareness of the SMTP input buffering.
355 PP/04 Add commandline_checks_require_admin option.
356 Exim drops privileges sanely, various checks such as -be aren't a
357 security problem, as long as you trust local users with access to their
358 own account. When invoked by services which pass untrusted data to
359 Exim, this might be an issue. Set this option in main configuration
360 AND make fixes to the calling application, such as using `--` to stop
363 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
364 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
365 responses to those, into a single TLS record each way (this usually means
366 a single packet). As a side issue, smtp_enforce_sync now works on TLS
369 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
370 affects you only if you're dancing at the edge of the param size limits.
371 If you are, and this message makes sense to you, then: raise the
372 configured limit or use OpenSSL 1.1. Nothing we can do for older
375 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
376 cmdline element to get the documented default one. Previously it was
379 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
380 are unsuable for non-message-specific reasons - eg. connection timeout,
381 banner-time rejection.
383 JH/16 Fix logging of delivery remote port, when specified by router, under
386 PP/06 Repair manualroute's ability to take options in any order, even if one
387 is the name of a transport.
390 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
392 JH/17 Change the list-building routines interface to use the expanding-string
393 triplet model, for better allocation and copying behaviour.
395 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
396 Previously it was constructed the first time a possibly-matching string
397 was met in the configuration file input during startup; now it is done
400 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
401 compatible one, to avoid the (poorly documented) possibility of a config
402 file in the working directory redirecting the DB files, possibly correpting
403 some existing file. CVE-2017-10140 assigned for BDB.
405 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
406 cache-hot. Previously, although the result was properly cached, the
407 initial verify call returned a defer.
409 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
410 the main verify for receipient in uncached-mode.
412 JH/22 Retire historical build files to an "unsupported" subdir. These are
413 defined as "ones for which we have no current evidence of testing".
415 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
416 if present. Previously it was ignored.
418 JH/24 Start using specified-initialisers in C structure init coding. This is
419 a C99 feature (it's 2017, so now considered safe).
421 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
422 if was a fixed-sized field and bitmask ops via macros; it is now more
425 PP/07 GitHub PR 56: Apply MariaDB build fix.
426 Patch provided by Jaroslav Škarvada.
428 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
429 during Coverity cleanups [4.87 JH/47]
430 Diagnosis and fix provided by Michael Fischer v. Mollard.
432 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
433 the right size to place the terminating semicolon on its own folded
434 line, the header hash was calculated to an incorrect value thanks to
435 the (relaxed) space the fold became.
437 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
438 and confused the parent.
440 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
441 which could crash as a result. This could lead to undeliverable messages.
443 JH/28 Logging: "next input sent too soon" now shows where input was truncated
446 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
447 matters on fast-turnover and PID-randomising systems, which were getting
448 out-of-order delivery.
450 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
451 a possibly-overlapping copy. The symptom was that "Remote host closed
452 connection in response to HELO" was logged instead of the actual 4xx
455 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
456 Previously only that bufferd was discarded, resulting in SYMTP command
459 JH/32 DKIM: when a message has multiple signatures matching an identity given
460 in dkim_verify_signers, run the dkim acl once for each. Previously only
461 one run was done. Bug 2189.
463 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
464 "panic the current process" to "deliberately defer". The panic log is
465 still written with the problem list name; the mail and reject logs now
466 get a temp-reject line for the message that was being handled, saying
467 something like "domains check lookup or other defer". The SMTP 451
468 message is still "Temporary local problem".
470 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
471 A crafted sequence of BDAT commands could result in in-use memory beeing
472 freed. CVE-2017-16943.
474 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
475 from SMTP input. Previously it was always done; now only done for DATA
476 and not BDAT commands. CVE-2017-16944.
478 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
479 to the message (such as an overlong header line). Previously this was
480 not done and we did not exit BDAT mode. Followon from the previous item
481 though a different problem.
487 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
488 than -2003 did; needs libidn2 in addition to libidn.
490 JH/02 The path option on a pipe transport is now expanded before use.
492 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
493 Patch provided by "Björn", documentation fix added too.
495 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
496 missing a wire-to-host endian conversion.
498 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
499 close after a BDAT command line could be taken as a following command,
500 giving a synch failure. Fix by only checking for synch immediately
501 before acknowledging the chunk.
503 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
504 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
505 macro. Patches provided by Josh Soref.
507 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
508 Previously we did not; the RFC seems ambiguous and VRFY is not listed
509 by IANA as a service extension. However, John Klensin suggests that we
512 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
513 the dkim code may be unix-mode line endings rather than smtp wire-format
514 CRLF, so prepend a CR to any bare LF.
516 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
517 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
519 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
520 the first were themselves being wrongly included in the feed into dkim
521 processing; with most chunk sizes in use this resulted in an incorrect
522 body hash calculated value.
524 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
525 DKIM signature block, for verification. Although advised against by
526 standards it is specifically not ruled illegal.
528 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
530 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
531 missing a body hash (the bh= tag).
533 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
534 It seems that HAProxy sends the Proxy Protocol information in clear and
535 only then does a TLS startup, so do the same.
537 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
538 TCP connections (such as for Spamd) unless the daemon successfully set
539 Fast Open mode on its listening sockets. This fixes breakage seen on
540 too-old kernels or those not configured for Fast Open, at the cost of
541 requiring both directions being enabled for TFO, and TFO never being used
542 by non-daemon-related Exim processes.
544 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
545 endings, at least on the first header line. Try to canonify any that get
546 past that check, despite the cost.
548 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
549 now limited to an arbitrary five deep, while parsing addresses with the
550 strip_excess_angle_brackets option enabled.
552 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
553 instead leave the unprompted TLS handshake in socket buffer for the
554 TLS library to consume.
556 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
558 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
560 JH/16 Drop variables when they go out of scope. Memory management drops a whole
561 region in one operation, for speed, and this leaves assigned pointers
562 dangling. Add checks run only under the testsuite which checks all
563 variables at a store-reset and panics on a dangling pointer; add code
564 explicitly nulling out all the variables discovered. Fixes one known
565 bug: a transport crash, where a dangling pointer for $sending_ip_address
566 originally assigned in a verify callout, is re-used.
568 PP/06 Drop '.' from @INC in various Perl scripts.
570 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
572 PP/08 Reduce a number of compilation warnings under clang; building with
573 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
574 should be warning-free.
576 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
578 HS/01 Fix portability problems introduced by PP/08 for platforms where
579 realloc(NULL) is not equivalent to malloc() [SunOS et al].
581 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
582 chunk. This allows us to accept broken chunked messages. We need a more
583 general solution here.
585 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
586 already-broken messages in the queue.
588 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
590 JH/19 Fix reference counting bug in routing-generated-address tracking.
596 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
597 supports it and a size is available (ie. the sending peer gave us one).
599 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
600 years of being deprecated). The replacements are the ACLs
601 acl_smtp_mime and acl_not_smtp_mime.
603 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
604 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
605 or even an in-clear connection were permitted. Now, if the host lookup
606 was dnssec and dane was requested then the host is only used if the
607 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
608 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
609 if one fails this test.
610 This means that a poorly-configured remote DNS will make it incommunicado;
611 but it protects against a DNS-interception attack on it.
613 JH/04 Bug 1810: make continued-use of an open smtp transport connection
614 non-noisy when a race steals the message being considered.
616 JH/05 If main configuration option tls_certificate is unset, generate a
617 self-signed certificate for inbound TLS connections.
619 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
620 in rewrites and routers.
622 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
623 and logged a warning sing 4.83; now they are a configuration file error.
625 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
626 (lacking @domain). Apply the same qualification processing as RCPT.
628 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
630 JH/10 Support ${sha256:} applied to a string (as well as the previous
633 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
634 a cutthrough deliver is pending, as we always want to make a connection.
635 This also avoids re-routing the message when later placing the cutthrough
636 connection after a verify cache hit.
637 Do not update it with the verify result either.
639 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
640 when routing results in more than one destination address.
642 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
643 signing (which inhibits the cutthrough capability). Previously only
644 the presence of an option was tested; now an expansion evaluating as
645 empty is permissible (obviously it should depend only on data available
646 when the cutthrough connection is made).
648 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
649 the relevant preceding SMTP command did not note the pipelining mode.
651 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
652 Previously they were not counted.
654 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
655 as one having no matching records. Previously we deferred the message
656 that needed the lookup.
658 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
659 distinguished as "(=".
661 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
662 for missing MX records. Previously it only worked for missing A records.
664 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
666 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
667 after the data-go-ahead and data-ack. Patch from Jason Betts.
669 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
670 even for a "none" policy. Patch from Tony Meyer.
672 JH/22 Fix continued use of a connection for further deliveries. If a port was
673 specified by a router, it must also match for the delivery to be
676 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
677 When one of the recipients of a message was unsuitable for the connection
678 (has no matching addresses), we lost track of needing to mark it
679 deferred. As a result mail would be lost.
681 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
683 JH/25 Decoding ACL controls is now done using a binary search; the source code
684 takes up less space and should be simpler to maintain. Merge the ACL
685 condition decode tables also, with similar effect.
687 JH/26 Fix problem with one_time used on a redirect router which returned the
688 parent address unchanged. A retry would see the parent address marked as
689 delivered, so not attempt the (identical) child. As a result mail would
692 JH/27 Fix a possible security hole, wherein a process operating with the Exim
693 UID can gain a root shell. Credit to http://www.halfdog.net/ for
694 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
697 JH/28 Enable {spool,log} filesystem space and inode checks as default.
698 Main config options check_{log,spool}_{inodes,space} are now
699 100 inodes, 10MB unless set otherwise in the configuration.
701 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
702 Previously it only applied to the main-section connection policy
705 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
707 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
708 by me. Added RFC7919 DH primes as an alternative.
710 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
711 are not in the system include path.
713 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
714 GnuTLS, when a session startup failed (eg because the client disconnected)
715 Exim did stdio operations after fclose. This was exposed by a recent
716 change which nulled out the file handle after the fclose.
718 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
719 signed directly by the cert-signing cert, rather than an intermediate
720 OCSP-signing cert. This is the model used by LetsEncrypt.
722 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
724 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
725 an incoming connection.
727 HS/02 Bug 1802: Do not half-close the connection after sending a request
730 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
731 fallback to "prime256v1".
733 JH/34 SECURITY: Use proper copy of DATA command in error message.
734 Could leak key material. Remotely exploitable. CVE-2016-9963.
740 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
741 and 3.4.4 - once the server is enabled to respond to an OCSP request
742 it does even when not requested, resulting in a stapling non-aware
743 client dropping the TLS connection.
745 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
746 support variable-length bit vectors. No functional change.
748 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
749 The I= interface field on outgoing lines is now after the H= remote
750 host field, same as incoming lines. There is a separate
751 outgoing_interface log selector which allows you to disable the
754 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
755 If not running log_selector +smtp_connection the mainlog would be held
756 open indefinitely after a "too many connections" event, including to a
757 deleted file after a log rotate. Leave the per net connection logging
758 leaving it open for efficiency as that will be quickly detected by the
759 check on the next write.
761 HS/01 Bug 1671: Fix post transport crash.
762 Processing the wait-<transport> messages could crash the delivery
763 process if the message IDs didn't exist for some reason. When
764 using 'split_spool_directory=yes' the construction of the spool
765 file name failed already, exposing the same netto behaviour.
767 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
768 mime_regex ACL conditions.
770 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
771 to DSN fail messages (bounces): remote IP, remote greeting, remote response
772 to HELO, local diagnostic string.
774 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
775 log line to debug. Even when configured with a tls authenticator many
776 client connections are expected to not authenticate in this way, so
777 an authenticate fail is not an error.
779 HS/02 Add the Exim version string to the process info. This way exiwhat
780 gives some more detail about the running daemon.
782 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
783 matter for fast-change records such as DNSBLs.
785 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
786 retry record, even if constant. There may be multiple transports with
787 different interface settings and the retry behaviour needs to be kept
790 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
792 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
794 JH/10 Bug 840: fix log_defer_output option of pipe transport
796 JH/11 Bug 830: use same host for all RCPTS of a message, even under
797 hosts_randomize. This matters a lot when combined with mua_wrapper.
799 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
800 ${quote_pgsql:<string>} operator.
802 JH/13 Bug 1708: avoid misaligned access in cached lookup.
804 JH/14 Change header file name for freeradius-client. Relevant if compiling
805 with Radius support; from the Gentoo tree and checked under Fedora.
807 JH/15 Bug 1712: Introduce $prdr_requested flag variable
809 JH/16 Bug 1714: Permit an empty string as expansion result for transport
810 option transport_filter, meaning no filtering.
812 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
814 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
815 defaults to "*" (all hosts). The variable is now available when not built
816 with TLS, default unset, mainly to enable keeping the testsuite sane.
817 If a server certificate is not supplied (via tls_certificate) an error is
818 logged, and clients will find TLS connections fail on startup. Presumably
819 they will retry in-clear.
820 Packagers of Exim are strongly encouraged to create a server certificate
821 at installation time.
823 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
824 with the $config_file variable.
826 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
827 in transport context, after the attempt, and per-recipient. The latter type
828 is per host attempted. The event data is the error message, and the errno
829 information encodes the lookup type (A vs. MX) used for the (first) host,
830 and the trailing two digits of the smtp 4xx response.
832 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
833 to write to mainlog (or rejectlog, paniclog) in the window between file
834 creation and permissions/ownership being changed. Particularly affects
835 installations where exicyclog is run as root, rather than exim user;
836 result is that the running daemon panics and dies.
838 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
840 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
841 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
842 "pri" and "weight". Note that the previous implicit priority given by the
843 list order is no longer honoured.
845 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
848 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
849 by defining SUPPORT_SOCKS.
851 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
852 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
853 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
854 variables are renamed to proxy_{local,external}_{address,port}.
856 JH/27 Move Internationalisation support from Experimental to mainline, enabled
857 for a build by defining SUPPORT_I18N
859 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
860 of the query string, and make ${quote_redis:} do that quoting.
862 JH/29 Move Events support from Experimental to mainline, enabled by default
863 and removable for a build by defining DISABLE_EVENT.
865 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
867 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
868 cached by the daemon.
870 JH/32 Move Redis support from Experimental to mainline, enabled for a build
871 by defining LOOKUP_REDIS. The libhiredis library is required.
873 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
874 keys are given for lookup.
876 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
877 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
878 only supported when built with TLS support. The PolarSSL SHA routines
879 are still used when the TLS library is too old for convenient support.
881 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
882 openssl_options), for security. OpenSSL forces this from version 1.1.0
883 server-side so match that on older versions.
885 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
886 allocation for $value could be released as the expansion processing
887 concluded, but leaving the global pointer active for it.
889 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
890 and to use the domains and local_parts ACL conditions.
892 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
893 incorrectly not doubled on cutthrough transmission, hence seen as a
894 body-termination at the receiving system - resulting in truncated mails.
895 Commonly the sender saw a TCP-level error, and retransmitted the message
896 via the normal store-and-forward channel. This could result in duplicates
897 received - but deduplicating mailstores were liable to retain only the
898 initial truncated version.
900 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
902 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
904 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
905 we're in there, support oversigning also; bug 1309.
907 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
909 HS/04 Add support for keep_environment and add_environment options.
911 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
912 either intentional arithmetic overflow during PRNG, or testing config-
915 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
916 delivery resulted in actual delivery. Cancel cutthrough before DATA
919 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
920 rejects a recipient: pass the reject to the originator.
922 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
923 Many were false-positives and ignorable, but it's worth fixing the
926 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
927 for the new environment-manipulation done at startup. Move the routines
928 from being local to tls.c to being global via the os.c file.
930 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
931 an extract embedded as result-arg for a map, the first arg for extract
932 is unavailable so we cannot tell if this is a numbered or keyed
933 extraction. Accept either.
939 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
942 JH/02 The smtp transport option "multi_domain" is now expanded.
944 JH/03 The smtp transport now requests PRDR by default, if the server offers
947 JH/04 Certificate name checking on server certificates, when exim is a client,
948 is now done by default. The transport option tls_verify_cert_hostnames
949 can be used to disable this per-host. The build option
950 EXPERIMENTAL_CERTNAMES is withdrawn.
952 JH/05 The value of the tls_verify_certificates smtp transport and main options
953 default to the word "system" to access the system default CA bundle.
954 For GnuTLS, only version 3.0.20 or later.
956 JH/06 Verification of the server certificate for a TLS connection is now tried
957 (but not required) by default. The verification status is now logged by
958 default, for both outbound TLS and client-certificate supplying inbound
961 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
964 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
965 Status Notification (bounce) messages are now MIME format per RFC 3464.
966 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
967 under the control of the dsn_advertise_hosts option, and routers may
968 have a dsn_lasthop option.
970 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
971 default, modifiable by a malware= option. The list separator for
972 the options can now be changed in the usual way. Bug 68.
974 JH/10 The smtp_receive_timeout main option is now expanded before use.
976 JH/11 The incoming_interface log option now also enables logging of the
977 local interface on delivery outgoing connections.
979 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
980 if the interface and destination host and port all match.
982 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
985 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
986 Patch from Andrew Lewis.
988 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
989 now supports optional time-restrictions, weighting, and priority
990 modifiers per server. Patch originally by <rommer@active.by>.
992 JH/16 The spamd_address main option now supports a mixed list of local
993 and remote servers. Remote servers can be IPv6 addresses, and
994 specify a port-range.
996 JH/17 Bug 68: The spamd_address main option now supports an optional
997 timeout value per server.
999 JH/18 Bug 1581: Router and transport options headers_add/remove can
1000 now have the list separator specified.
1002 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1005 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1008 JH/21 Support for the A6 type of dns record is withdrawn.
1010 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1011 rather than the verbs used.
1013 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1014 from 255 to 1024 chars.
1016 JH/24 Verification callouts now attempt to use TLS by default.
1018 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1019 are generic router options now. The defaults didn't change.
1021 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1022 Original patch from Alexander Shikoff, worked over by JH.
1024 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1025 files if ZCAT_COMMAND is not executable.
1027 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1029 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1031 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1032 Normally benign, it bites when the pair was led to by a CNAME;
1033 modern usage is to not canonicalize the domain to a CNAME target
1034 (and we were inconsistent anyway for A-only vs AAAA+A).
1036 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1038 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1039 when evaluating $sender_host_dnssec.
1041 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1042 $sender_helo_dnssec variable.
1044 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1046 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1048 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1050 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1051 documented as working, but never had. Support all but $spam_report.
1053 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1054 added for tls authenticator.
1056 HS/03 Add perl_taintmode main config option
1062 TL/01 When running the test suite, the README says that variables such as
1063 no_msglog_check are global and can be placed anywhere in a specific
1064 test's script, however it was observed that placement needed to be near
1065 the beginning for it to behave that way. Changed the runtest perl
1066 script to read through the entire script once to detect and set these
1067 variables, reset to the beginning of the script, and then run through
1068 the script parsing/test process like normal.
1070 TL/02 The BSD's have an arc4random API. One of the functions to induce
1071 adding randomness was arc4random_stir(), but it has been removed in
1072 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1073 function when detected.
1075 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1076 cause callback expansion.
1078 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1079 syntax errors in an expansion can be treated as a string instead of
1080 logging or causing an error, due to the internal use of bool_lax
1081 instead of bool when processing it.
1083 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1084 server certificates when making smtp deliveries.
1086 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1088 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1090 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1092 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1093 Merged patch from Sebastian Wiedenroth.
1095 JH/05 Fix results-pipe from transport process. Several recipients, combined
1096 with certificate use, exposed issues where response data items split
1097 over buffer boundaries were not parsed properly. This eventually
1098 resulted in duplicates being sent. This issue only became common enough
1099 to notice due to the introduction of connection certificate information,
1100 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1102 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1103 size buffer was used, resulting in syntax errors when an expansion
1106 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1107 version 3.3.6 or later.
1109 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1110 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1111 both become "event_action", the variables become $event_name, $event_data
1112 and $event_defer_errno. There is a new variable $verify_mode, usable in
1113 routers, transports and related events. The tls:cert event is now also
1114 raised for inbound connections, if the main configuration event_action
1117 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1118 early OCSP support, but no stapling (appears to be less than 1.0.0).
1120 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1121 server certificate names available under the smtp transport option
1122 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1125 JH/10 Time-related extraction expansions from certificates now use the main
1126 option "timezone" setting for output formatting, and are consistent
1127 between OpenSSL and GnuTLS compilations. Bug 1541.
1129 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1130 encoded parameter in the incoming message. Bug 1558.
1132 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1133 include certificate info, eximon was claiming there were spoolfile
1136 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1138 JH/14 Log delivery-related information more consistently, using the sequence
1139 "H=<name> [<ip>]" wherever possible.
1141 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1142 are problematic for Debian distribution, omit them from the release
1145 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1147 JH/16 Fix string representation of time values on 64bit time_t architectures.
1150 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1151 output list separator was used.
1156 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1157 checkers that were complaining about end of non-void function with no
1160 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1161 This was a regression introduced in 4.83 by another bugfix.
1163 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1165 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1166 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1172 TF/01 Correctly close the server side of TLS when forking for delivery.
1174 When a message was received over SMTP with TLS, Exim failed to clear up
1175 the incoming connection properly after forking off the child process to
1176 deliver the message. In some situations the subsequent outgoing
1177 delivery connection happened to have the same fd number as the incoming
1178 connection previously had. Exim would try to use TLS and fail, logging
1179 a "Bad file descriptor" error.
1181 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1182 utilities have not been installed.
1184 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1185 temporary space as the ACL may create new global variables.
1187 TL/01 LDAP support uses per connection or global context settings, depending
1188 upon the detected version of the libraries at build time.
1190 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1191 to extract and use the src ip:port in logging and expansions as if it
1192 were a direct connection from the outside internet. PPv2 support was
1193 updated based on HAProxy spec change in May 2014.
1195 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1197 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1198 Properly escape header and check for NULL return.
1200 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1203 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1205 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1206 characters in header names, implemented as a verify condition.
1207 Contributed by Michael Fischer v. Mollard.
1209 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1210 results permerror and temperror. Previous values are deprecated but
1211 still accepted. In a future release, err_perm and err_temp will be
1212 completely removed, which will be a backward incompatibility if the
1213 ACL tests for either of these two old results. Patch contributed by
1214 user bes-internal on the mailing list.
1216 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1218 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1219 selectors, in both main and reject logs.
1221 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1224 JH/07 Add malware type "sock" for talking to simple daemon.
1226 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1228 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1229 routers/transports under cutthrough routing.
1231 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1232 numbers. Touch up "bool" conditional to keep the same definition.
1234 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1236 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1238 JH/12 Expand items in router/transport headers_add or headers_remove lists
1239 individually rather than the list as a whole. Bug 1452.
1241 Required for reasonable handling of multiple headers_ options when
1242 they may be empty; requires that headers_remove items with embedded
1243 colons must have them doubled (or the list-separator changed).
1245 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1246 view the policy declared in the DMARC record. Currently, $dmarc_status
1247 is a combined value of both the record presence and the result of the
1250 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1252 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1253 dnslookup router and the smtp transport (applying to the forward
1256 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1257 of ldap servers used for a specific lookup. Patch provided by Heiko
1260 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1261 New variable $lookup_dnssec_authenticated for observability.
1263 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1264 Patch submitted by Lars Timman.
1266 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1268 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1269 Requires trusted mode and valid format message id, aborts otherwise.
1270 Patch contributed by Heiko Schlichting.
1272 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1273 certextract with support for various fields. Bug 1358.
1275 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1276 is requested by default, modifiable by smtp transport option
1279 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1280 operate on certificate variables to give certificate fingerprints
1281 Also new ${sha256:cert_variable}.
1283 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1285 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1286 Christian Aistleitner.
1288 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1290 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1291 file. Patch from Wolfgang Breyha.
1293 JH/25 Expand the coverage of the delivery $host and $host_address to
1294 client authenticators run in verify callout. Bug 1476.
1296 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1297 align with daemon_smtp_ports. Bug 72.
1299 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1300 support and error reporting did not work properly.
1302 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1303 and is readable. Patch from Andrew Colin Kissa.
1305 TL/14 Enhance documentation of ${run expansion and how it parses the
1306 commandline after expansion, particularly in the case when an
1307 unquoted variable expansion results in an empty value.
1309 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1311 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1312 by renaming away from it. Addresses GH issue 15, reported by
1315 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1317 TL/15 SECURITY: prevent double expansion in math comparison functions
1318 (can expand unsanitized data). Not remotely exploitable.
1325 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1327 PP/02 Make -n do something, by making it not do something.
1328 When combined with -bP, the name of an option is not output.
1330 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1333 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1334 $sender_host_name and config options to manage this, and basic check
1337 PP/05 DSCP support for outbound connections and control modifier for inbound.
1339 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1340 (Only plugin which currently uses this is kerberos4, which nobody should
1341 be using, but we should make it available and other future plugins might
1342 conceivably use it, even though it would break NAT; stuff *should* be
1343 using channel bindings instead).
1345 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1346 name; added for Sendmail compatibility; requires admin caller.
1347 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1348 just ignore it); requires trusted caller.
1349 Also parse but ignore: -Ac -Am -X<logfile>
1352 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1354 TL/02 Add +smtp_confirmation as a default logging option.
1356 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1357 Patch by Magnus Holmgren from 2007-02-20.
1359 TL/04 Bugzilla 1281 - Spec typo.
1360 Bugzilla 1283 - Spec typo.
1361 Bugzilla 1290 - Spec grammar fixes.
1363 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1365 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1367 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1368 mailing list by by Dmitry Isaikin.
1370 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1372 JH/02 Support "G" suffix to numbers in ${if comparisons.
1374 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1376 NM/01 Bugzilla 1197 - Spec typo
1377 Bugzilla 1196 - Spec examples corrections
1379 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1381 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1382 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1385 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1386 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1388 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1389 "acl {{name}{arg}...}", and optional args on acl condition
1392 JH/05 Permit multiple router/transport headers_add/remove lines.
1394 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1396 JH/07 Avoid using a waiting database for a single-message-only transport.
1397 Performance patch from Paul Fisher. Bugzilla 1262.
1399 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1402 JH/09 Add $headers_added variable, with content from use of ACL modifier
1403 add_header (but not yet added to the message). Bugzilla 199.
1405 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1406 Pulled from Bugzilla 817 by Wolfgang Breyha.
1408 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1410 (nb: this is the same fix as in Exim 4.80.1)
1412 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1415 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1418 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1420 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1421 advertise SMTP AUTH mechanism to us, instead of a generic
1422 protocol violation error. Also, make Exim more robust to bad
1423 data from the Dovecot auth socket.
1425 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1427 When a queue runner is handling a message, Exim first routes the
1428 recipient addresses, during which it prunes them based on the retry
1429 hints database. After that it attempts to deliver the message to
1430 any remaining recipients. It then updates the hints database using
1433 So if a recipient address works intermittently, it can get repeatedly
1434 deferred at routing time. The retry hints record remains fresh so the
1435 address never reaches the final cutoff time.
1437 This is a fairly common occurrence when a user is bumping up against
1438 their storage quota. Exim had some logic in its local delivery code
1439 to deal with this. However it did not apply to per-recipient defers
1440 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1442 This change adds a proper retry rule check during routing so that the
1443 final cutoff time is checked against the message's age. We only do
1444 this check if there is an address retry record and there is not a
1445 domain retry record; this implies that previous attempts to handle
1446 the address had the retry_use_local_parts option turned on. We use
1447 this as an approximation for the destination being like a local
1448 delivery, as in LMTP.
1450 I suspect this new check makes the old local delivery cutoff check
1451 redundant, but I have not verified this so I left the code in place.
1453 TF/02 Correct gecos expansion when From: is a prefix of the username.
1455 Test 0254 submits a message to Exim with the header
1459 When I ran the test suite under the user fanf2, Exim expanded
1460 the header to contain my full name, whereas it should have added
1461 a Resent-Sender: header. It erroneously treats any prefix of the
1462 username as equal to the username.
1464 This change corrects that bug.
1466 GF/01 DCC debug and logging tidyup
1467 Error conditions log to paniclog rather than rejectlog.
1468 Debug lines prefixed by "DCC: " to remove any ambiguity.
1470 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1472 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1473 Bug spotted by Jeremy Harris; was flawed since initial commit.
1474 Would have resulted in OCSP responses post-SNI triggering an Exim
1475 NULL dereference and crash.
1477 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1479 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1480 Bug detection, analysis and fix by Samuel Thibault.
1481 Bugzilla 1331, Debian bug #698092.
1483 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1485 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1486 Server implementation by Todd Lyons, client by JH.
1487 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1488 config variable "prdr_enable" controls whether the server
1489 advertises the facility. If the client requests PRDR a new
1490 acl_data_smtp_prdr ACL is called once for each recipient, after
1491 the body content is received and before the acl_smtp_data ACL.
1492 The client is controlled by both of: a hosts_try_prdr option
1493 on the smtp transport, and the server advertisement.
1494 Default client logging of deliveries and rejections involving
1495 PRDR are flagged with the string "PRDR".
1497 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1498 fclose(). Diagnosis by Todd Lyons.
1500 PP/17 Update configure.default to handle IPv6 localhost better.
1501 Patch by Alain Williams (plus minor tweaks).
1504 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1505 This is now consistent with GnuTLS, and is now documented: the
1506 previous undocumented portable approach to treating the option as
1507 unset was to force an expansion failure. That still works, and
1508 an empty string is now equivalent.
1510 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1511 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1512 not performing validation itself.
1514 PP/20 Added force_command boolean option to pipe transport.
1515 Patch from Nick Koston, of cPanel Inc.
1517 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1520 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1522 PP/21 Fix eximon continuous updating with timestamped log-files.
1523 Broken in a format-string cleanup in 4.80, missed when I repaired the
1524 other false fix of the same issue.
1525 Report and fix from Heiko Schlichting.
1528 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1529 Report from Prashanth Katuri.
1531 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1532 It's SecureTransport, so affects any MacOS clients which use the
1533 system-integrated TLS libraries, including email clients.
1535 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1536 using a MIME ACL for non-SMTP local injection.
1537 Report and assistance in diagnosis by Warren Baker.
1539 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1541 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1543 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1544 last id that failed so it may be referenced in subsequent ACL's.
1546 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1549 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1550 ldap library initialization, allowing self-signed CA's to be
1551 used. Also properly sets require_cert option later in code by
1552 using NULL (global ldap config) instead of ldap handle (per
1553 session). Bug diagnosis and testing by alxgomz.
1555 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1556 the src/util/ subdirectory.
1558 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1559 renamed to Transport Post Delivery Action by Jeremy Harris, as
1562 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1563 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1564 redis_servers = needs to be configured which will be used by the redis
1565 lookup. Patch from Warren Baker, of The Packet Hub.
1567 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1569 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1570 hostname or reverse DNS when processing a host list. Used suggestions
1571 from multiple comments on this bug.
1573 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1575 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1576 Missed a few lines, added it to make the runtest require no keyboard
1579 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1580 contains upper case chars. Make router use caseful_local_part.
1582 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1583 support when GnuTLS has been built with p11-kit.
1589 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1591 This, or similar/improved, will also be change PP/11 of 4.82.
1597 PP/01 Handle short writes when writing local log-files.
1598 In practice, only affects FreeBSD (8 onwards).
1599 Bugzilla 1053, with thanks to Dmitry Isaikin.
1601 NM/01 Bugzilla 949 - Documentation tweak
1603 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1606 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1608 PP/02 Implemented gsasl authenticator.
1610 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1612 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1613 `pkg-config foo` for cflags/libs.
1615 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1616 with rest of GSASL and with heimdal_gssapi.
1618 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1619 `pkg-config foo` for cflags/libs for the TLS implementation.
1621 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1622 properties get this fed in as external SSF. A number of robustness
1623 and debugging improvements to the cyrus_sasl authenticator.
1625 PP/08 cyrus_sasl server now expands the server_realm option.
1627 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1628 Patch by Jeremy Harris.
1630 PP/10 Added dbmjz lookup type.
1632 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1634 PP/12 MAIL args handles TAB as well as SP, for better interop with
1635 non-compliant senders.
1636 Analysis and variant patch by Todd Lyons.
1638 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1639 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1640 Patch from Dirk Mueller <dmueller@suse.com>
1642 PP/13 tls_peerdn now print-escaped for spool files.
1643 Observed some $tls_peerdn in wild which contained \n, which resulted
1644 in spool file corruption.
1646 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1647 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1648 or write after TLS renegotiation, which otherwise led to messages
1651 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1652 as a tracking header (ie: a signed header comes before the signature).
1653 Patch from Wolfgang Breyha.
1655 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1656 comma-sep list; embedded commas doubled.
1658 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1660 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1662 Report and patch from Dmitry Banschikov.
1664 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1665 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1666 failures. We appear to now support TLS1.1+ with Exim.
1668 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1669 lets Exim select keys and certificates based upon TLS SNI from client.
1670 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1671 before an outbound SMTP session. New log_selector, +tls_sni.
1673 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1674 NULL dereference. Report and patch from Alun Jones.
1676 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1677 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1678 Not seeing resolver debug output on NetBSD, but suspect this is a
1679 resolver implementation change.
1681 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1682 Left warnings. Added "eximon gdb" invocation mode.
1684 PP/21 Defaulting "accept_8bitmime" to true, not false.
1686 PP/22 Added -bw for inetd wait mode support.
1688 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1689 locate the relevant includes and libraries. Made this the default.
1691 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1692 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1694 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1695 This may cause build issues on older platforms.
1697 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1698 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1699 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1700 Added SNI support via GnuTLS too.
1701 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1703 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1705 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1706 Applied second patch from Janne, implementing suggestion to default
1707 multiple-strings-in-record handling to match SPF spec.
1709 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1711 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1712 read-only, out of scope).
1713 Patch from Wolfgang Breyha, report from Stuart Northfield.
1715 PP/29 Fix three issues highlighted by clang analyser static analysis.
1716 Only crash-plausible issue would require the Cambridge-specific
1717 iplookup router and a misconfiguration.
1718 Report from Marcin Mirosław.
1720 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1722 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1723 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1724 As part of this, removing so much warning spew let me fix some minor
1725 real issues in debug logging.
1727 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1728 assignment on my part. Fixed.
1730 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1731 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1732 Janne Snabb (who went above and beyond: thank you).
1734 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1735 string otherwise requires a connection and a bunch more work and it's
1736 relatively easy to get wrong. Should also expose TLS library linkage
1739 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1740 64-bit ${eval} (JH/03).
1742 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1743 GNU libc to support some of the 64-bit stuff, should not lead to
1744 conflicts. Defined before os.h is pulled in, so if a given platform
1745 needs to override this, it can.
1747 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1748 protection layer was required, which is not implemented.
1749 Bugzilla 1254, patch from Wolfgang Breyha.
1751 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1752 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1753 tls_dhparam take prime identifiers. Also unbreak combination of
1754 OpenSSL+DH_params+TLSSNI.
1756 PP/39 Disable SSLv2 by default in OpenSSL support.
1762 PP/01 Solaris build fix for Oracle's LDAP libraries.
1763 Bugzilla 1109, patch from Stephen Usher.
1765 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1767 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1770 TF/02 Fix a couple more cases where we did not log the error message
1771 when unlink() failed. See also change 4.74-TF/03.
1773 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1774 lock up or crash if it happened to be inside a call to libc when it
1775 got a SIGUSR1 from exiwhat.
1777 The SIGUSR1 handler appends the current process status to the process
1778 log which is later printed by exiwhat. It used to use the general
1779 purpose logging code to do this, but several functions it calls are
1780 not safe for signals.
1782 The new output code in the SIGUSR1 handler is specific to the process
1783 log, and simple enough that it's easy to inspect for signal safety.
1784 Removing some special cases also simplifies the general logging code.
1785 Removing the spurious timestamps from the process log simplifies
1788 TF/04 Improved ratelimit ACL condition.
1790 The /noupdate option has been deprecated in favour of /readonly which
1791 has clearer semantics. The /leaky, /strict, and /readonly update modes
1792 are mutually exclusive. The update mode is no longer included in the
1793 database key; it just determines when the database is updated. (This
1794 means that when you upgrade Exim will forget old rate measurements.)
1796 Exim now checks that the per_* options are used with an update mode that
1797 makes sense for the current ACL. For example, when Exim is processing a
1798 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1799 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1800 must specify per_mail/readonly. If you omit the update mode it defaults to
1801 /leaky where that makes sense (as before) or /readonly where required.
1803 The /noupdate option is now undocumented but still supported for
1804 backwards compatibility. It is equivalent to /readonly except that in
1805 ACLs where /readonly is required you may specify /leaky/noupdate or
1806 /strict/noupdate which are treated the same as /readonly.
1808 A useful new feature is the /count= option. This is a generalization
1809 of the per_byte option, so that you can measure the throughput of other
1810 aggregate values. For example, the per_byte option is now equivalent
1811 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1813 The per_rcpt option has been generalized using the /count= mechanism
1814 (though it's more complicated than the per_byte equivalence). When it is
1815 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1816 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1817 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1818 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1819 Note that using per_rcpt with a non-readonly update mode in more than
1820 one ACL will cause the recipients to be double-counted. (The per_mail
1821 and per_byte options don't have this problem.)
1823 The handling of very low rates has changed slightly. If the computed rate
1824 is less than the event's count (usually one) then this event is the first
1825 after a long gap. In this case the rate is set to the same as this event's
1826 count, so that the first message of a spam run is counted properly.
1828 The major new feature is a mechanism for counting the rate of unique
1829 events. The new per_addr option counts the number of different
1830 recipients that someone has sent messages to in the last time period. It
1831 behaves like per_rcpt if all the recipient addresses are different, but
1832 duplicate recipient addresses do not increase the measured rate. Like
1833 the /count= option this is a general mechanism, so the per_addr option
1834 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1835 example, measure the rate that a client uses different sender addresses
1836 with the options per_mail/unique=$sender_address. There are further
1837 details in the main documentation.
1839 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1841 TF/06 Removed a few PCRE remnants.
1843 TF/07 Automatically extract Exim's version number from tags in the git
1844 repository when doing development or release builds.
1846 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1847 Bugzilla 879. Patch from Paul Fisher.
1849 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1850 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1853 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1855 PP/05 Variable $av_failed, true if the AV scanner deferred.
1856 Bugzilla 1078. Patch from John Horne.
1858 PP/06 Stop make process more reliably on build failure.
1859 Bugzilla 1087. Patch from Heiko Schlittermann.
1861 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1862 Bugzilla 1089. Patch from Heiko Schlittermann.
1864 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1865 Bugzilla 1131. Patch from Holger Weiß.
1867 PP/09 Handle IPv6 addresses with SPF.
1868 Bugzilla 860. Patch from Wolfgang Breyha.
1870 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1872 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1875 PP/11 match_* no longer expand right-hand-side by default.
1876 New compile-time build option, EXPAND_LISTMATCH_RHS.
1877 New expansion conditions, "inlist", "inlisti".
1879 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1881 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1883 PP/14 fix log_write() format string regression from TF/03.
1884 Bugzilla 1152. Patch from Dmitry Isaikin.
1890 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1892 PP/02 Harmonised TLS library version reporting; only show if debugging.
1893 Layout now matches that introduced for other libraries in 4.74 PP/03.
1895 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1897 PP/04 New "dns_use_edns0" global option.
1899 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1902 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1903 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1905 TK/01 Updated PolarSSL code to 0.14.2.
1906 Bugzilla 1097. Patch from Andreas Metzler.
1908 PP/07 Catch divide-by-zero in ${eval:...}.
1909 Fixes bugzilla 1102.
1911 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1914 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1915 format-string attack -- SECURITY: remote arbitrary code execution.
1917 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1918 time unintentionally subject to list matching rules, letting the header
1919 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1920 arbitrary string expansion). This allowed for information disclosure.
1922 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1923 INT_MIN/-1 -- value coerced to INT_MAX.
1929 NM/01 Workaround for PCRE version dependency in version reporting
1932 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1933 This fixes portability to compilers other than gcc, notably
1934 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1936 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1937 makefiles for portability to HP-UX and POSIX correctness.
1939 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1940 Also via indented variable definition in the Makefile.
1941 (Debugging by Oliver Heesakkers).
1943 PP/02 Restore caching of spamd results with expanded spamd_address.
1944 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1946 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1947 Improves build reliability. Fix from: Frank Elsner
1949 NM/02 Fix wide character breakage in the rfc2047 coding
1950 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1952 NM/03 Allow underscore in dnslist lookups
1953 Fixes bug 1026. Patch from Graeme Fowler
1955 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1956 Code patches from Adam Ciarcinski of NetBSD.
1958 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1961 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1962 is logged, to avoid truncation. Patch from John Horne.
1964 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1965 Patch from Jakob Hirsch.
1967 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1968 SQL string expansion failure details.
1969 Patch from Andrey Oktyabrski.
1971 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1972 Patch from Simon Arlott.
1974 PP/09 New lookups functionality failed to compile on old gcc which rejects
1975 extern declarations in function scope.
1976 Patch from Oliver Fleischmann
1978 PP/10 Use sig_atomic_t for flags set from signal handlers.
1979 Check getgroups() return and improve debugging.
1980 Fixed developed for diagnosis in bug 927 (which turned out to be
1983 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1984 Patch from Mark Zealey.
1986 PP/12 Bugzilla 1056: Improved spamd server selection.
1987 Patch from Mark Zealey.
1989 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1990 Based on patch from Heiko Schlittermann.
1992 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1993 Patch from Uwe Doering, sign-off by Michael Haardt.
1995 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1996 variable declaration deep within a block. Bug and patch from
1999 PP/15 lookups-Makefile IRIX compatibility coercion.
2001 PP/16 Make DISABLE_DKIM build knob functional.
2003 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2004 Patch by Simon Arlott
2006 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2007 variable argument macros. Our copy now differs from upstream.
2013 TF/01 Failure to get a lock on a hints database can have serious
2014 consequences so log it to the panic log.
2016 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2017 controlled using the smtp_confirmation log selector.
2019 TF/03 Include the error message when we fail to unlink a spool file.
2021 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2022 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2023 for maintaining out-of-tree patches for some time.
2025 PP/01 Bugzilla 139: Documentation and portability issues.
2026 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2027 Handle per-OS dynamic-module compilation flags.
2029 PP/02 Let /dev/null have normal permissions.
2030 The 4.73 fixes were a little too stringent and complained about the
2031 permissions on /dev/null. Exempt it from some checks.
2032 Reported by Andreas M. Kirchwitz.
2034 PP/03 Report version information for many libraries, including
2035 Exim version information for dynamically loaded libraries. Created
2036 version.h, now support a version extension string for distributors
2037 who patch heavily. Dynamic module ABI change.
2039 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2040 privilege escalation vulnerability whereby the Exim run-time user
2041 can cause root to append content of the attacker's choosing to
2044 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2047 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2048 If dropping privileges for untrusted macros, we disabled normal logging
2049 on the basis that it would fail; for the Exim run-time user, this is not
2050 the case, and it resulted in successful deliveries going unlogged.
2051 Fixed. Reported by Andreas Metzler.
2057 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2058 only prepend for the Resent-* case. Fixes regression introduced in
2059 Exim 4.70 by NM/22 for Bugzilla 607.
2061 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2062 increasing numbers of administrators be bitten by this.
2064 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2066 PP/03 Bugzilla 994: added openssl_options main configuration option.
2068 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2070 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2072 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2074 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2075 without a peer certificate, leading to a segfault because of an
2076 assumption that peers always have certificates. Be a little more
2077 paranoid. Problem reported by Martin Tscholak.
2079 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2080 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2081 NB: ClamAV planning to remove STREAM in "middle of 2010".
2082 CL also introduces -bmalware, various -d+acl logging additions and
2083 more caution in buffer sizes.
2085 PP/09 Implemented reverse_ip expansion operator.
2087 PP/10 Bugzilla 937: provide a "debug" ACL control.
2089 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2091 PP/12 Bugzilla 973: Implement --version.
2093 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2095 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2097 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2099 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2100 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2101 ignore trailing whitespace.
2103 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2105 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2108 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2109 Notification from Dr Andrew Aitchison.
2111 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2112 ExtendedDetectionInfo response format.
2113 Notification from John Horne.
2115 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2118 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2119 XSL and documented dependency on system catalogs, with examples of how
2122 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2125 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2126 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2127 configuration file which is writeable by the Exim user or group.
2129 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2130 of configuration files to cover files specified with the -C option if
2131 they are going to be used with root privileges, not just the default
2134 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2135 option (effectively making it always true).
2137 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2138 files to be used while preserving root privileges.
2140 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2141 that rogue child processes cannot use them.
2143 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2144 run-time user, instead of root.
2146 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2147 Exim run-time user without dropping privileges.
2149 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2150 result string, instead of calling string_vformat() twice with the same
2153 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2154 for other users. Others should always drop root privileges if they use
2155 -C on the command line, even for a whitelisted configure file.
2157 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2159 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2165 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2166 $data_path, and $header_path variables; fixed documentation bugs and
2169 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2170 exipick to access non-standard spools, including the "frozen" queue
2173 NM/01 Bugzilla 965: Support mysql stored procedures.
2174 Patch from Alain Williams
2176 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2178 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2179 Patch from Andreas Metzler
2181 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2182 Patch from Kirill Miazine
2184 NM/05 Bugzilla 671: Added umask to procmail example.
2186 JJ/03 installed exipick 20100323.0, fixing doc bug
2188 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2189 directory. Notification and patch from Dan Rosenberg.
2191 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2193 TK/02 Improve log output when DKIM signing operation fails.
2195 MH/01 Treat the transport option dkim_domain as a colon separated
2196 list, not as a single string, and sign the message with each element,
2197 omitting multiple occurences of the same signer.
2199 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2200 Bugzilla 985, 986. Patch by Simon Arlott
2202 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2203 Patch by Simon Arlott
2205 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2206 MBX locking. Notification from Dan Rosenberg.
2212 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2214 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2216 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2218 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2220 NM/04 Bugzilla 915: Flag broken perl installation during build.
2226 TK/01 Added patch by Johannes Berg that expands the main option
2227 "spamd_address" if it starts with a dollar sign.
2229 TK/02 Write list of recipients to X-Envelope-Sender header when building
2230 the mbox-format spool file for content scanning (suggested by Jakob
2233 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2234 (http://www.dcc-servers.net/) support via dccifd. Activated by
2235 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2237 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2238 by Mark Daniel Reidel <mr@df.eu>.
2240 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2241 When building exim an external PCRE library is now needed -
2242 PCRE is a system library on the majority of modern systems.
2243 See entry on PCRE_LIBS in EDITME file.
2245 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2246 conversation. Added nologin parameter to request.
2247 Patch contributed by Kirill Miazine.
2249 TF/01 Do not log submission mode rewrites if they do not change the address.
2251 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2253 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2254 log files in place. Contributed by Roberto Lima.
2256 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2258 TF/03 Bugzilla 615: When checking the local_parts router precondition
2259 after a local_part_suffix or local_part_prefix option, Exim now
2260 does not use the address's named list lookup cache, since this
2261 contains cached lookups for the whole local part.
2263 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2264 Robert Millan. Documentation is in experimental-spec.txt.
2266 TF/04 Bugzilla 668: Fix parallel build (make -j).
2268 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2270 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2271 Patch provided by Jan Srzednicki.
2273 TF/05 Leading white space used to be stripped from $spam_report which
2274 wrecked the formatting. Now it is preserved.
2276 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2277 that they are available at delivery time.
2279 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2281 TF/08 TLS error reporting now respects the incoming_interface and
2282 incoming_port log selectors.
2284 TF/09 Produce a more useful error message if an SMTP transport's hosts
2285 setting expands to an empty string.
2287 NM/06 Bugzilla 744: EXPN did not work under TLS.
2288 Patch provided by Phil Pennock.
2290 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2291 Patch provided by Richard Godbee.
2293 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2294 acl_smtp_notquit, added index entry.
2296 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2297 Patch provided by Eugene Bujak.
2299 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2300 accept(). Patch provided by Maxim Dounin.
2302 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2303 Patch provided by Phil Pennock.
2305 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2307 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2308 Patch provided by Brad "anomie" Jorsch.
2310 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2311 Patch provided by Dean Brooks.
2313 TK/05 Add native DKIM support (does not depend on external libraries).
2315 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2316 Patch provided by Graeme Fowler.
2318 NM/16 Bugzilla 851: Documentation example syntax fix.
2320 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2322 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2325 NM/19 Bugzilla 745: TLS version reporting.
2326 Patch provided by Phil Pennock.
2328 NM/20 Bugzilla 167: bool: condition support.
2329 Patch provided by Phil Pennock.
2331 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2332 clients. Patch provided by Phil Pennock.
2334 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2335 Patch provided by Brad "anomie" Jorsch.
2337 NM/23 Bugzilla 687: Fix misparses in eximstats.
2338 Patch provided by Heiko Schlittermann.
2340 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2341 Patch provided by Heiko Schlittermann.
2343 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2344 plus update to original patch.
2346 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2348 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2349 Patch provided by David Brownlee.
2351 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2353 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2355 NM/30 Bugzilla 888: TLS documentation bugfixes.
2357 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2359 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2360 Unlike the original bugzilla I have changed all shell scripts in src tree.
2362 NM/33 Bugzilla 898: Transport filter timeout fix.
2363 Patch by Todd Rinaldo.
2365 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2366 Patch by Serge Demonchaux.
2368 NM/35 Bugzilla 39: Base64 decode bug fixes.
2369 Patch by Jakob Hirsch.
2371 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2373 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2375 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2377 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2383 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2384 ALT-N's libdkim that I have put here:
2385 http://duncanthrax.net/exim-experimental/
2387 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2388 were called 'true' and it seems that C99 defines that as a reserved
2389 keyword to be used with 'bool' variable types. That means you could
2390 not include C99-style headers which use bools without triggering
2391 build errors in sieve.c.
2393 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2394 as mailq or other aliases. Changed the --help handling significantly
2395 to do whats expected. exim_usage() emits usage/help information.
2397 SC/01 Added the -bylocaldomain option to eximstats.
2399 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2401 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2403 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2409 PH/01 Another patch from the Sieve maintainer.
2411 PH/02 When an IPv6 address is converted to a string for single-key lookup
2412 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2413 dots are used instead of colons so that keys in lsearch files need not
2414 contain colons. This was done some time before quoting was made available
2415 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2416 (notated using the quote facility) so as to distinguish them from IPv4
2417 keys. This meant that lookups for IP addresses in host lists did not work
2418 for iplsearch lookups.
2420 This has been fixed by arranging for IPv6 addresses to be expressed with
2421 colons if the lookup type is iplsearch. This is not incompatible, because
2422 previously such lookups could never work.
2424 The situation is now rather anomalous, since one *can* have colons in
2425 ordinary lsearch keys. However, making the change in all cases is
2426 incompatible and would probably break a number of configurations.
2428 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2431 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2432 conversion specification without a maximum field width, thereby enabling
2433 a rogue spamd server to cause a buffer overflow. While nobody in their
2434 right mind would setup Exim to query an untrusted spamd server, an
2435 attacker that gains access to a server running spamd could potentially
2436 exploit this vulnerability to run arbitrary code as the Exim user.
2438 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2439 $primary_hostname instead of what libspf2 thinks the hosts name is.
2441 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2442 a directory entry by the name of the lookup key. Previously, if a
2443 symlink pointed to a non-existing file or a file in a directory that
2444 Exim lacked permissions to read, a lookup for a key matching that
2445 symlink would fail. Now it is enough that a matching directory entry
2446 exists, symlink or not. (Bugzilla 503.)
2448 PH/03 The body_linecount and body_zerocount variables are now exported in the
2451 PH/04 Added the $dnslist_matched variable.
2453 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2454 This means they are set thereafter only if the connection becomes
2457 PH/06 Added the client_condition to authenticators so that some can be skipped
2458 by clients under certain conditions.
2460 PH/07 The error message for a badly-placed control=no_multiline_responses left
2461 "_responses" off the end of the name.
2463 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2465 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2466 (without spaces) instead of just copying the configuration text.
2468 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2470 PH/11 Added $max_received_linelength.
2472 PH/12 Added +ignore_defer and +include_defer to host lists.
2474 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2475 way in which PCRE > 7.0 is built.
2477 PH/14 Implemented queue_only_load_latch.
2479 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2480 MAIL command. The effect was to mangle the value on 64-bit systems.
2482 PH/16 Another patch from the Sieve maintainer.
2484 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2486 PH/18 If a system quota error occurred while trying to create the file for
2487 a maildir delivery, the message "Mailbox is full" was not appended to the
2488 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2489 only to a quota excession during the actual writing of the file.
2491 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2492 characters?) which causes problems in log lines. The DN values are now
2493 passed through string_printing() before being added to log lines.
2495 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2496 and InterBase are left for another time.)
2498 PH/21 Added message_body_newlines option.
2500 PH/22 Guard against possible overflow in moan_check_errorcopy().
2502 PH/23 POSIX allows open() to be a macro; guard against that.
2504 PH/24 If the recipient of an error message contained an @ in the local part
2505 (suitably quoted, of course), incorrect values were put in $domain and
2506 $local_part during the evaluation of errors_copy.
2512 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2513 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2516 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2517 issue a MAIL command.
2519 PH/02 In an ACL statement such as
2521 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2523 if a client was not listed at all, or was listed with a value other than
2524 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2525 the condition was not true (as it should be), so access was not denied.
2526 The bug was that the ! inversion was incorrectly passed on to the second
2527 item. This has been fixed.
2529 PH/03 Added additional dnslists conditions == and =& which are different from
2530 = and & when the dns lookup returns more than one IP address.
2532 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2533 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2535 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2536 FSYNC, which compiles an option called disable_fsync that allows for
2537 bypassing fsync(). The documentation is heavily laced with warnings.
2539 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2541 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2542 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2543 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2544 including adding "make clean"; (3) Added -fPIC when compiling the test
2545 dynamically loaded module, to get rid of a warning.
2547 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2548 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2549 = 0s. The bug is otherwise harmless.
2551 PH/07 There was a bug in the dovecot authenticator such that the value of
2552 $auth1 could be overwritten, and so not correctly preserved, after a
2553 successful authentication. This usually meant that the value preserved by
2554 the server_setid option was incorrect.
2556 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2558 PH/09 Installed PCRE release 7.0.
2560 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2561 run for batched SMTP input. It is now run at the start of every message
2562 in the batch. While fixing this I discovered that the process information
2563 (output by running exiwhat) was not always getting set for -bs and -bS
2564 input. This is fixed, and it now also says "batched" for BSMTP.
2566 PH/11 Added control=no_pipelining.
2568 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2569 patch, slightly modified), and move the expansion of helo_data till after
2570 the connection is made in the smtp transport (so it can use these
2573 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2575 PH/14 Added log_selector = +pid.
2577 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2579 PH/16 Add ${if forany and ${if forall.
2581 PH/17 Added dsn_from option to vary the From: line in DSNs.
2583 PH/18 Flush SMTP output before performing a callout, unless control =
2584 no_callout_flush is set.
2586 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2587 was true (the default) a successful delivery failed to delete the retry
2588 item, thus causing premature timeout of the address. The bug is now
2591 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2593 PH/21 Long custom messages for fakedefer and fakereject are now split up
2594 into multiline responses in the same way that messages for "deny" and
2595 other ACL rejections are.
2597 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2598 with slight modification.
2600 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2601 draft, changing the syntax and factoring some duplicate code".
2603 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2604 for deliveries of the second and subsequent messages over the same SMTP
2607 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2608 ${reduce, with only minor "tidies".
2610 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2612 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2613 expansion side effects.
2615 PH/27 When a message times out after an over-quota error from an Exim-imposed
2616 quota, the bounce message says "mailbox is full". This message was not
2617 being given when it was a system quota that was exceeded. It now should
2620 MH/03 Made $recipients available in local_scan(). local_scan() already has
2621 better access to the recipient list through recipients_list[], but
2622 $recipients can be useful in postmaster-provided expansion strings.
2624 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2625 in the case of a MAIL command with additional options following the
2626 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2627 were accidentally chopped off.
2629 PH/29 SMTP synchronization checks are implemented when a command is read -
2630 there is a check that no more input is waiting when there shouldn't be
2631 any. However, for some commands, a delay in an ACL can mean that it is
2632 some time before the response is written. In this time, more input might
2633 arrive, invalidly. So now there are extra checks after an ACL has run for
2634 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2635 pipelining has not been advertised.
2637 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2639 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2640 returned in the SMTP response when smtp_return_error_details was false.
2641 This has been fixed.
2643 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2644 instead of the C I/O that was originally supplied, because problems were
2645 reported on Solaris.
2647 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2648 Exim which did not show up earlier: it was assuming that a call to
2649 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2650 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2651 was a macro that became an assignment, so it seemed to work. This has
2652 changed to a proper function call with a void return, hence the compile
2653 error. Exim's code has been fixed.
2655 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2658 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2660 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2662 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2663 because it turns out to be too big or there is a timeout) there is no
2664 "Completed" line in the log. When some messages of this type were
2665 selected by exigrep, they were listed as "not completed". Others were
2666 picked up by some special patterns. I have improved the selection
2667 criteria to be more general.
2669 PH/38 The host_find_failed option in the manualroute router can now be set
2670 to "ignore", to completely ignore a host whose IP address cannot be
2671 found. If all hosts are ignored, the behaviour is controlled by the new
2672 host_all_ignored option.
2674 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2675 homing or because of multiple MX records with /mx) generated more than
2676 one IP address, and the following item turned out to be the local host,
2677 all the secondary addresses of the first item were incorrectly removed
2678 from the list, along with the local host and any following hosts (which
2679 is what is supposed to happen).
2681 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2682 whoever called Exim into the -H file. In the case of the daemon it was
2683 behaving confusingly. When first started, it used values for whoever
2684 started the daemon, but after a SIGHUP it used the Exim user (because it
2685 calls itself on a restart). I have changed the code so that it now always
2688 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2689 message are rejected with the same error (e.g. no authentication or bad
2690 sender address), and a DATA command is nevertheless sent (as can happen
2691 with PIPELINING or a stupid MUA), the error message that was given to the
2692 RCPT commands is included in the rejection of the DATA command. This is
2693 intended to be helpful for MUAs that show only the final error to their
2696 PH/42 Another patch from the Sieve maintainer.
2698 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2699 Eximstats - Fixed some broken HTML links and added missing column headers
2701 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2702 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2704 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2706 PH/43 Yet another patch from the Sieve maintainer.
2708 PH/44 I found a way to check for a TCP/IP connection going away before sending
2709 the response to the final '.' that terminates a message, but only in the
2710 case where the client has not sent further data following the '.'
2711 (unfortunately, this is allowed). However, in many cases there won't be
2712 any further data because there won't be any more messages to send. A call
2713 to select() can be used: if it shows that the input is "ready", there is
2714 either input waiting, or the socket has been closed. An attempt to read
2715 the next input character can distinguish the two cases. Previously, Exim
2716 would have sent an OK response which the client would never have see.
2717 This could lead to message repetition. This fix should cure that, at
2718 least in a lot of common cases.
2720 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2721 advertised in response to EHLO.
2727 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2728 fixed by 4.65/MH/01 (is this a record?) are fixed:
2730 (i) An empty string was always treated as zero by the numeric comparison
2731 operators. This behaviour has been restored.
2733 (ii) It is documented that the numeric comparison operators always treat
2734 their arguments as decimal numbers. This was broken in that numbers
2735 starting with 0 were being interpreted as octal.
2737 While fixing these problems I realized that there was another issue that
2738 hadn't been noticed. Values of message_size_limit (both the global option
2739 and the transport option) were treated as octal if they started with 0.
2740 The documentation was vague. These values are now always treated as
2741 decimal, and I will make that clear in the documentation.
2747 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2748 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2751 MH/01 Don't check that the operands of numeric comparison operators are
2752 integers when their expansion is in "skipping" mode (fixes bug
2753 introduced by 4.64-PH/07).
2755 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2756 child addresses, Exim now panics and dies. Previously, because the count
2757 is held in a short int, deliveries were likely to be lost. As such a
2758 large number of recipients for a single message is ridiculous
2759 (performance will be very, very poor), I have chosen to impose a limit
2760 rather than extend the field.
2766 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2767 leftover -K file (the existence of which was triggered by #402).
2768 While we were at it, introduced process PID as part of the -K
2769 filename. This should rule out race conditions when creating
2772 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2773 processing considerably. Previous code took too long for large mails,
2774 triggering a timeout which in turn triggers #401.
2776 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2777 in the DK code in transports.c. sendfile() is not really portable,
2778 hence the _LINUX specificness.
2780 TF/01 In the add_headers option to the mail command in an Exim filter,
2781 there was a bug that Exim would claim a syntax error in any
2782 header after the first one which had an odd number of characters
2785 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2786 callout verification, Exim cached a "reject" for the entire domain. This
2787 is correct for most verifications, but it is not correct for a recipient
2788 verification with use_sender or use_postmaster set, because in that case
2789 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2790 case of MAIL FROM:<> rejection from other early rejections (e.g.
2791 rejection of HELO). When verifying a recipient using a non-null MAIL
2792 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2793 Whatever the result of the callout, the value of the domain cache is
2794 left unchanged (for any other kind of callout, getting as far as trying
2795 RCPT means that the domain itself is ok).
2797 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2800 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2801 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2802 session, the daemon ignores ECONNECT errors and logs others; it now
2803 ignores EPIPE as well.
2805 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2806 (quoted-printable decoding).
2808 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2809 later the small subsequent patch to fix an introduced bug.
2811 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2813 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2815 PH/08 An error is now given if message_size_limit is specified negative.
2817 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2818 to be given (somewhat) arbitrary names.
2820 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2823 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2824 miscellaneous code fixes
2826 PH/10 Added the log_reject_target ACL modifier to specify where to log
2829 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2830 hostname. This is wrong, because it relates to the incoming message (and
2831 probably the interface on which it is arriving) and not to the outgoing
2832 callout (which could be using a different interface). This has been
2833 changed to use the value of the helo_data option from the smtp transport
2834 instead - this is what is used when a message is actually being sent. If
2835 there is no remote transport (possible with a router that sets up host
2836 addresses), $smtp_active_hostname is used.
2838 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2839 tweaks were necessary in order to get it to work (see also 21 below):
2840 (a) The code assumed that strncpy() returns a negative number on buffer
2841 overflow, which isn't the case. Replaced with Exim's string_format()
2843 (b) There were several signed/unsigned issues. I just did the minimum
2844 hacking in of casts. There is scope for a larger refactoring.
2845 (c) The code used strcasecmp() which is not a standard C function.
2846 Replaced with Exim's strcmpic() function.
2847 (d) The code set only $1; it now sets $auth1 as well.
2848 (e) A simple test gave the error "authentication client didn't specify
2849 service in request". It would seem that Dovecot has changed its
2850 interface. Fortunately there's a specification; I followed it and
2851 changed what the client sends and it appears to be working now.
2853 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2856 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2857 address A is aliased to B and C, where B exists and C does not. Without
2858 -v the output is "A verified" because verification stops after a
2859 successful redirection if more than one address is generated. However,
2860 with -v the child addresses are also verified. Exim was outputting "A
2861 failed to verify" and then showing the successful verification for C,
2862 with its parentage. It now outputs "B failed to verify", showing B's
2863 parentage before showing the successful verification of C.
2865 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2866 look up a TXT record in a specific list after matching in a combined
2869 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2870 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2871 they consult the DNS. I had assumed they would set it the way they
2872 wanted; and indeed my experiments on Linux seem to show that in some
2873 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2874 To be on the safe side, however, I have now made the interface to
2875 host_find_byname() similar to host_find_bydns(), with an argument
2876 containing the DNS resolver options. The host_find_byname() function now
2877 sets these options at its start, just as host_find_bydns() does. The smtp
2878 transport options dns_qualify_single and dns_search_parents are passed to
2879 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2880 of host_find_byname() use the default settings of RES_DEFNAMES
2881 (qualify_single) but not RES_DNSRCH (search_parents).
2883 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2884 spool_read_header() do less string testing, by means of a preliminary
2885 switch on the second character of optional "-foo" lines. (This is
2886 overdue, caused by the large number of possibilities that now exist.
2887 Originally there were few.) While I was there, I also converted the
2888 str(n)cmp tests so they don't re-test the leading "-" and the first
2889 character, in the hope this might squeeze out yet more improvement.
2891 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2892 flag allowing group syntax was set by the header_syntax check but not
2893 turned off, possible causing trouble later; (2) The flag was not being
2894 set at all for the header_verify test, causing "group"-style headers to
2895 be rejected. I have now set it in this case, and also caused header_
2896 verify to ignore an empty address taken from a group. While doing this, I
2897 came across some other cases where the code for allowing group syntax
2898 while scanning a header line wasn't quite right (mostly, not resetting
2899 the flag correctly in the right place). These bugs could have caused
2900 trouble for malformed header lines. I hope it is now all correct.
2902 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2903 with the "reply" argument non-NULL. The code, however (which originally
2904 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2905 but it didn't always do it. This confused somebody who was copying the
2906 code for some other use. I have removed all the tests.
2908 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2909 feature that was used to support insecure browsers during the U.S. crypto
2910 embargo. It requires special client support, and Exim is probably the
2911 only MTA that supported it -- and would never use it because real RSA is
2912 always available. This code has been removed, because it had the bad
2913 effect of slowing Exim down by computing (never used) parameters for the
2914 RSA_EXPORT functionality.
2916 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2917 authenticator to fail if there's a tab character in the incoming data
2918 (there should never be unless someone is messing about, as it's supposed
2919 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2920 if the connection is using TLS or if the remote IP is the same as the
2921 local IP, and the "valid-client-cert option" if a client certificate has
2924 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2925 authenticators. This can be used for authorization after authentication
2926 succeeds. (In the case of plaintext, it servers for both authentication
2929 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2930 if any retry times were supplied.
2932 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2933 connection, where there is no client IP address to check. In this
2934 situation, the verify now always succeeds.
2936 PH/25 Applied John Jetmore's -Mset patch.
2938 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2940 PH/27 In a string expansion for a processed (not raw) header when multiple
2941 headers of the same name were present, leading whitespace was being
2942 removed from all of them, but trailing whitespace was being removed only
2943 from the last one. Now trailing whitespace is removed from each header
2944 before concatenation. Completely empty headers in a concatenation (as
2945 before) are ignored.
2947 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2948 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2950 PH/29 [Removed. This was a change that I later backed out, and forgot to
2951 correct the ChangeLog entry (that I had efficiently created) before
2952 committing the later change.]
2954 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2955 address errors (4xx response to RCPT) over the same connection as other
2956 messages routed to the same hosts. Such deliveries are always "forced",
2957 so retry times are not inspected. This resulted in far too many retries
2958 for the affected addresses. The effect occurred only when there were more
2959 hosts than the hosts_max_try setting in the smtp transport when it had
2960 the 4xx errors. Those hosts that it had tried were not added to the list
2961 of hosts for which the message was waiting, so if all were tried, there
2962 was no problem. Two fixes have been applied:
2964 (i) If there are any address or message errors in an SMTP delivery, none
2965 of the hosts (tried or untried) are now added to the list of hosts
2966 for which the message is waiting, so the message should not be a
2967 candidate for sending over the same connection that was used for a
2968 successful delivery of some other message. This seems entirely
2969 reasonable: after all the message is NOT "waiting for some host".
2970 This is so "obvious" that I'm not sure why it wasn't done
2971 previously. Hope I haven't missed anything, but it can't do any
2972 harm, as the worst effect is to miss an optimization.
2974 (ii) If, despite (i), such a delivery is accidentally attempted, the
2975 routing retry time is respected, so at least it doesn't keep
2976 hammering the server.
2978 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2979 in ${readsocket because some servers need this prod.
2981 PH/32 Added some extra debug output when updating a wait-xxx database.
2983 PH/33 The hint "could be header name not terminated by colon", which has been
2984 given for certain expansion errors for a long time, was not being given
2985 for the ${if def:h_colon_omitted{... case.
2987 PH/34 The spec says: "With one important exception, whenever a domain list is
2988 being scanned, $domain contains the subject domain." There was at least
2989 one case where this was not true.
2991 PH/35 The error "getsockname() failed: connection reset by peer" was being
2992 written to the panic log as well as the main log, but it isn't really
2993 panic-worthy as it just means the connection died rather early on. I have
2994 removed the panic log writing for the ECONNRESET error when getsockname()
2997 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2998 runs only) independently of the message's sender address. This meant
2999 that, if the 4xx error was in fact related to the sender, a different
3000 message to the same recipient with a different sender could confuse
3001 things. In particular, this can happen when sending to a greylisting
3002 server, but other circumstances could also provoke similar problems.
3003 I have changed the default so that the retry time for these errors is now
3004 based a combination of the sender and recipient addresses. This change
3005 can be overridden by setting address_retry_include_sender=false in the
3008 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3009 remote server are returned as part of bounce messages. This was not
3010 happening for LMTP over a pipe (the lmtp transport), but now it is the
3011 same for both kinds of LMTP.
3013 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3014 in header lines that were in fact CNAMEs. This is no longer the case.
3016 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3017 and queue runs started by the daemon processed all messages. This has
3018 been fixed so that -R and -S can now usefully be given with -q<time>.
3020 PH/40 Import PCRE release 6.7 (fixes some bugs).
3022 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3024 PH/42 Give an error if -q is specified more than once.
3026 PH/43 Renamed the variables $interface_address and $interface_port as
3027 $received_ip_address and $received_port, to make it clear that these
3028 values apply to message reception, and not to the outgoing interface when
3029 a message is delivered. (The old names remain recognized, of course.)
3031 PH/44 There was no timeout on the connect() call when using a Unix domain
3032 socket in the ${readsocket expansion. There now is.
3034 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3035 be meaningful with "accept".
3037 SC/01 Eximstats V1.43
3038 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3040 SC/02 Eximstats V1.44
3041 Use a glob alias rather than an array ref in the generated
3042 parser. This improves both readability and performance.
3044 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3045 Collect SpamAssassin and rejection statistics.
3046 Don't display local sender or destination tables unless
3047 there is data to show.
3048 Added average volumes into the top table text output.
3050 SC/04 Eximstats V1.46
3051 Collect data on the number of addresses (recipients)
3052 as well as the number of messages.
3054 SC/05 Eximstats V1.47
3055 Added 'Message too big' to the list of mail rejection
3056 reasons (thanks to Marco Gaiarin).
3058 SC/06 Eximstats V1.48
3059 Mainlog lines which have GMT offsets and are too short to
3060 have a flag are now skipped.
3062 SC/07 Eximstats V1.49 (Alain Williams)
3063 Added the -emptyok flag.
3065 SC/08 Eximstats V1.50
3066 Fixes for obtaining the IP address from reject messages.
3068 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3069 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3070 whitespace changes from 4.64-PH/27
3072 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3075 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3076 are found, allow negative numbers in numeric criteria)
3078 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3080 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3081 to match changes made in 4.64-PH/43
3083 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3085 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3086 "domain" is actually an IP address, and force a failure. This locks out
3087 those revolvers/nameservers that support "A-for-A" lookups, in
3088 contravention of the specifications.
3090 PH/48 When a host name was looked up from an IP address, and the subsequent
3091 forward lookup of the name timed out, the host name was left in
3092 $sender_host_name, contrary to the specification.
3094 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3095 restricted to single-key lookups, Exim was not diagnosing an error if
3096 * or *@ was used with a query-style lookup.
3098 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3100 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3101 long ago, but noone interested enough thought of it. Let's just say that
3102 the "1.1" means that there are some new functions that weren't there at
3103 some point in the past.
3105 PH/51 Error processing for expansion failure of helo_data from an smtp
3106 transport during callout processing was broken.
3108 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3109 tested/used via the -bh/-bhc/-bs options.
3111 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3112 bug, fixed in subsequent PCRE releases).
3114 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3115 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3117 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3123 SC/01 Use a glob alias rather than an array ref in eximstats generated
3124 parser. This improves both readability and performance.
3126 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3127 Don't display local sender or destination tables in eximstats unless
3128 there is data to show.
3129 Added average volumes into the eximstats top table text output.
3131 SC/03 Collect data on the number of addresses (recipients) as well
3132 as the number of messages in eximstats.
3134 TF/01 Correct an error in the documentation for the redirect router. Exim
3135 does (usually) call initgroups() when daemonizing.
3137 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3138 with consistent privilege compared to when running as a daemon.
3140 TF/03 Note in the spec that $authenticated_id is not set for local
3141 submissions from trusted users.
3143 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3144 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3146 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3147 by adding some example configuration directives to the default
3148 configuration file. A little bit of work is required to uncomment the
3149 directives and define how usernames and passwords are checked, but
3150 there is now a framework to start from.
3152 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3153 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3154 without this. I don't know how relevant this is to other LDAP libraries.
3156 PH/02 Add the verb name to the "unknown ACL verb" error.
3158 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3160 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3162 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3163 directory not expanded when it should be if an expanded home directory
3164 was set for the address (which is overridden by the transport).
3166 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3169 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3170 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3171 because it is too late at that time, and has no effect.
3173 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3174 security issue with \' (bugzilla #107). I could not use the
3175 PQescapeStringConn() function, because it needs a PGconn value as one of
3178 PH/08 When testing addresses using -bt, indicate those final addresses that
3179 are duplicates that would not cause an additional delivery. At least one
3180 person was confused, thinking that -bt output corresponded to deliveries.
3181 (Suppressing duplicates isn't a good idea as you lose the information
3182 about possibly different redirections that led to the duplicates.)
3184 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3185 systems where poll() doesn't work, in particular OS X.
3187 PH/10 Added more information to debugging output for retry time not reached.
3189 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3190 operations in malware.c.
3192 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3195 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3196 syslog_duplication set false, log lines that would normally be written
3197 both the the main log and to the reject log were not written to syslog at
3200 PH/14 In the default configuration, change the use of "message" in ACL warn
3201 statements to "add_header".
3203 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3204 not followed by a command (e.g. "seen endif").
3206 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3207 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3210 PH/17 Added extra conditions to the default value of delay_warning_condition
3214 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3215 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3216 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3219 The Auto-Submitted: and various List- headers are standardised, whereas I
3220 don't think Precedence: ever was.
3222 PH/18 Refactored debugging code in route_finduser() to show more information,
3223 in particular, the error code if getpwnam() issues one.
3225 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3226 This is apparently needed in addition to the PH/07 change above to avoid
3227 any possible encoding problems.
3229 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3230 but not after initializing Perl.
3232 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3233 output them only if debugging. By default they are written stderr,
3234 apparently, which is not desirable.
3236 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3239 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3242 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3244 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3245 authenticated or an ident call has been made. Suppress the default
3246 values for $authenticated_id and $authenticated_sender (but permit -oMai
3247 and -oMas) when testing with -bh.
3249 PH/24 Re-jigged the order of the tests in the default configuration so that the
3250 tests for valid domains and recipients precede the DNS black list and CSA
3251 tests, on the grounds that those ones are more expensive.
3253 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3254 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3255 This bug exists in every version of Exim that I still have, right back to
3258 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3259 However, an attempt to turn on case-sensitivity in a regex key by
3260 including (?-i) didn't work because the subject string was already
3261 lowercased, and the effects were non-intuitive. It turns out that a
3262 one-line patch can be used to allow (?-i) to work as expected.
3268 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3269 other effects) broke the use of negated acl sub-conditions.
3271 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3274 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3275 "Deny" causes Exim to reject the incoming connection with a 554 error.
3276 Unfortunately, if there is a major crisis, such as a disk failure,
3277 tcp-wrappers gives "deny", whereas what one would like would be some
3278 kind of temporary error. A kludge has been added to help with this.
3279 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3280 554 error is used if errno is still zero or contains ENOENT (which occurs
3281 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3284 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3286 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3287 errors. Otherwise a message that provokes a temporary error (when other
3288 messages do not) can cause a whole host to time out.
3290 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3291 addresses were routed directly to files or pipes from a redirect router.
3292 File deliveries just didn't batch; pipe deliveries might have suffered
3295 PH/06 A failure to get a lock for a hints database would erroneously always say
3296 "Failed to get write lock", even when it was really a read lock.
3298 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3299 of 0600. This has been changed to use the value of the lockfile_mode
3300 option (which defaults to 0600).
3302 PH/08 Applied small patch from the Sieve maintainer.
3304 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3305 folder from quota calculations, a direct delivery into this folder messed
3306 up the contents of the maildirsize file. This was because the regex was
3307 used only to exclude .Trash (or whatever) when the size of the mailbox
3308 was calculated. There was no check that a delivery was happening into an
3309 excluded directory. This bug has been fixed by ignoring all quota
3310 processing for deliveries into excluded directories.
3312 PH/10 Added the maildirfolder_create_regex option to appendfile.
3318 PH/01 The code for finding all the local interface addresses on a FreeBSD
3319 system running IPv6 was broken. This may well have applied to all BSD
3320 systems, as well as to others that have similar system calls. The broken
3321 code found IPv4 interfaces correctly, but gave incorrect values for the
3322 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3323 that it would not match correctly against @[] and not recognize the IPv6
3326 PH/02 The ipliteral router was not recognizing addresses of the form user@
3327 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3329 PH/03 Added disable_ipv6.
3331 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3332 decoded form, because it is most often used to construct To: headers
3333 lines in autoreplies, and the decoded form may well be syntactically
3334 invalid. However, $reply_address has leading white space removed, and all
3335 newlines turned into spaces so that the autoreply transport does not
3338 PH/05 If group was specified without a user on a router, and no group or user
3339 was specified on a transport, the group from the router was ignored.
3341 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3342 for visible compile-time settings that can be used to change these
3343 numbers, for those that want even more. Backwards compatibility with old
3344 spool files has been maintained. However, going back to a previous Exim
3345 release will lost any variables that are in spool files.
3347 PH/07 Two small changes when running in the test harness: increase delay when
3348 passing a TCP/IP connection to a new process, in case the original
3349 process has to generate a bounce, and remove special handling of
3350 127.0.0.2 (sic), which is no longer necessary.
3352 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3353 be the same on different OS.
3355 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3358 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3359 whether --show-vars was specified or not
3361 JJ/02 exipick: Added support for new ACL variable spool format introduced
3364 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3365 syntactically invalid From: or Reply-to: line, and a filter used this to
3366 generate an autoreply, and therefore failed to obtain an address for the
3367 autoreply, Exim could try to deliver to a non-existent relative file
3368 name, causing unrelated and misleading errors. What now happens is that
3369 it logs this as a hard delivery error, but does not attempt to create a
3372 PH/11 The exinext utility has a -C option for testing purposes, but although
3373 the given file was scanned by exinext itself; it wasn't being passed on
3374 when Exim was called.
3376 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3377 an end-of-file indication when reading a command response.
3379 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3380 compiled. In many other places in Exim, IPv6 addresses are always
3381 recognized, so I have changed this. It also means that IPv4 domain
3382 literals of the form [IPV4:n.n.n.n] are now always recognized.
3384 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3385 used if the router is not running as root, for example, when verifying at
3386 ACL time, or when using -bh. The debugging output from this situation was
3387 non-existent - all you got was a failure to exec. I have made two
3390 (a) Failures to set uid/gid, the current directory, or a process leader
3391 in a subprocess such as that created by queryprogram now generate
3392 suitable debugging output when -d is set.
3394 (b) The queryprogram router detects when it is not running as root,
3395 outputs suitable debugging information if -d is set, and then runs
3396 the subprocess without attempting to change uid/gid.
3398 PH/15 Minor change to Makefile for building test_host (undocumented testing
3401 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3402 additional section of a DNS packet that returns MX or SRV records.
3403 Instead, it always explicitly searches for A/AAAA records. This avoids
3404 major problems that occur when a DNS server includes only records of one
3405 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3406 fixed another bug: if SRV records were looked up and the corresponding
3407 address records were *not* found in the additional section, the port
3408 values from the SRV records were lost.
3410 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3411 using the correct key (the original address) when searching the retry
3412 rules in order to find which one to use for generating the retry hint.
3414 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3415 adding the default one. Similarly, if it contains a Reply-To: header, the
3416 errors_reply_to option, if set, is not used.
3418 PH/19 When calculating a retry time, Exim used to measure the "time since
3419 failure" by looking at the "first failed" field in the retry record. Now
3420 it does not use this if it is later than than the arrival time of the
3421 message. Instead it uses the arrival time. This makes for better
3422 behaviour in cases where some deliveries succeed, thus re-setting the
3423 "first failed" field. An example is a quota failure for a huge message
3424 when small messages continue to be delivered. Without this change, the
3425 "time since failure" will always be short, possible causing more frequent
3426 delivery attempts for the huge message than are intended.
3427 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3429 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3430 $1, $2, $3) because the numerical variables can be reset during some
3431 expansion items (e.g. "match"), thereby losing the authentication data.
3433 PH/21 Make -bV show the size of off_t variables so that the test suite can
3434 decide whether to run tests for quotas > 2G.
3436 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3437 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3438 filecount value is greater than 2G or if a quota value is greater than 2G
3439 on a system where the size of off_t is not greater than 4, a panic error
3442 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3443 never match. The debug and -bh output now contains an explicit error
3444 message indicating a malformed IPv4 address or mask.
3446 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3447 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3448 PH/23 above applies.
3450 PH/25 Do not write to syslog when running in the test harness. The only
3451 occasion when this arises is a failure to open the main or panic logs
3452 (for which there is an explicit test).
3454 PH/26 Added the /no_tell option to "control=freeze".
3456 PH/27 If a host name lookup failed very early in a connection, for example, if
3457 the IP address matched host_lookup and the reverse lookup yielded a name
3458 that did not have a forward lookup, an error message of the form "no IP
3459 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3460 could be logged. Now it outputs the IP address instead of "NULL".
3462 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3463 allows the sender and the authenticated sender to be set when
3464 submitting a message from within Exim. Since child_open_exim() is
3465 documented for local_scan(), the new function should be too.
3467 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3468 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3469 results in an empty string is now treated as unset.
3471 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3473 PH/31 Added sender_verify_fail logging option.
3475 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3476 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3477 tidied the source and removed it altogether.
3479 PH/33 When a queue run was abandoned because the load average was too high, a
3480 log line was always written; now it is written only if the queue_run log
3481 selector is set. In addition, the log line for abandonment now contains
3482 information about the queue run such as the pid. This is always present
3483 in "start" and "stop" lines but was omitted from the "abandon" line.
3485 PH/34 Omit spaces between a header name and the colon in the error message that
3486 is given when verify = headers_syntax fails (if there are lots of them,
3487 the message gets confusing).
3489 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3490 names, as there are now some PTR records that contain slashes. This check
3491 is only to protect against broken name servers that fall over on strange
3492 characters, so the fact that it applies to all lookups doesn't matter.
3494 PH/36 Now that the new test suite is complete, we can remove some of the
3495 special code in Exim that was needed for the old test suite. For example,
3496 sorting DNS records because real resolvers return them in an arbitrary
3497 order. The new test suite's fake resolver always returns records in the
3500 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3501 bounces) except when queue_only is set, to avoid logging races between
3502 the different processes.
3504 PH/38 Panic-die if .include specifies a non-absolute path.
3506 PH/39 A tweak to the "H" retry rule from its user.
3508 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3509 a label. They prevented compilation on older perls.
3511 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3512 a warning to be raised on newish perls.
3514 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3515 on queue. Changes to match documented behaviour of showing count of
3516 messages matching specified criteria.
3518 PH/40 Changed the default ident timeout from 30s to 5s.
3520 PH/41 Added support for the use of login_cap features, on those BSD systems
3521 that have them, for controlling the resources used by pipe deliveries.
3523 PH/42 The content-scanning code uses fopen() to create files in which to put
3524 message data. Previously it was not paying any attention to the mode of
3525 the files. Exim runs with umask(0) because the rest of the code creates
3526 files with open(), and sets the required mode explicitly. Thus, these
3527 files were ending up world-writeable. This was not a big issue, because,
3528 being within the spool directory, they were not world-accessible. I have
3529 created a function called modefopen, which takes an additional mode
3530 argument. It sets umask(777), creates the file, chmods it to the required
3531 mode, then resets the umask. All the relevant calls to fopen() in the
3532 content scanning code have been changed to use this function.
3534 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3535 to 24 hours. This avoids potential overflow problems when processing G
3536 and H retry rules. I suspect nobody ever tinkers with this value.
3538 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3540 PH/45 When the plaintext authenticator is running as a client, the server's
3541 challenges are checked to ensure they are valid base64 strings. By
3542 default, the authentication attempt is cancelled if an invalid string is
3543 received. Setting client_ignore_invalid_base64 true ignores these errors.
3544 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3545 they are received. Thus, the responses can be made to depend on the
3546 challenges. If an invalid string is ignored, an empty string is placed in
3549 PH/46 Messages that are created by the autoreply transport now contains a
3550 References: header, in accordance with RFCs 2822 and 3834.
3552 PH/47 Added authenticated_sender_force to the smtp transport.
3554 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3556 PH/49 Installed latest patch from the Sieve maintainer.
3558 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3559 was also set, the appendfile transport was unnecessarily scanning a
3560 directory of message files (e.g. for maildir delivery) to find the count
3561 of files (along with the size), even though it did not need this
3562 information. It now does the scan only if it needs to find either the
3563 size of the count of files.
3565 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3567 PH/52 Two bugs concerned with error handling when the smtp transport is
3570 (i) Exim was not creating retry information for temporary errors given
3571 for individual recipients after the DATA command when the smtp transport
3572 was used in LMTP mode. This meant that they could be retried too
3573 frequently, and not timed out correctly.
3575 (ii) Exim was setting the flag that allows error details to be returned
3576 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3577 recipients that were returned after the DATA command.
3579 PH/53 This is related to PH/52, but is more general: for any failing address,
3580 when detailed error information was permitted to be returned to the
3581 sender, but the error was temporary, then after the final timeout, only
3582 "retry timeout exceeded" was returned. Now it returns the full error as
3583 well as "retry timeout exceeded".
3585 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3586 do this, and (what is worse) MTAs that accept it.
3588 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3589 will now be deprecated.
3591 PH/56 New os.c-cygwin from the Cygwin maintainer.
3593 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3594 formats (previously only available in exim formats via -bpr, -bpru,
3595 and -bpra. Now also available in native and exiqgrep formats)
3597 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3598 with very large, slow to parse queues
3600 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3602 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3604 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3605 responses to authentication challenges, though it was showing the
3606 challenges; (ii) I've removed the CR characters from the debug output for
3609 PH/58 Allow for the insertion of a newline as well as a space when a string
3610 is turned into more than one encoded-word during RFC 2047 encoding. The
3611 Sieve code now uses this.
3613 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3614 data_4xx, lost_connection, tls_required.
3616 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3617 message was being sent as an SMTP response.
3619 PH/61 Add -l and -k options to exicyclog.
3621 PH/62 When verifying, if an address was redirected to one new address, so that
3622 verification continued, and the new address failed or deferred after
3623 having set something in $address_data, the value of $address_data was not
3624 passed back to the ACL. This was different to the case when no
3625 redirection occurred. The value is now passed back in both cases.
3627 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3628 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3629 use login_cap.h, so on its own it isn't the distinguishing feature. The
3630 new name refers directly to the setclassresources() function.
3632 PH/65 Added configuration files for NetBSD3.
3634 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3636 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3637 is preferred over IPv4.
3639 PH/68 The bounce_return_message and bounce_return_body options were not being
3640 honoured for bounces generated during the reception of non-SMTP messages.
3641 In particular, this applied to messages rejected by the ACL. This bug has
3642 been fixed. However, if bounce_return_message is true and bounce_return_
3643 body is false, the headers that are returned for a non-SMTP message
3644 include only those that have been read before the error was detected.
3645 (In the case of an ACL rejection, they have all been read.)
3647 PH/69 The HTML version of the specification is now built in a directory called
3648 spec_html instead of spec.html, because the latter looks like a path with
3649 a MIME-type, and this confuses some software.
3651 PH/70 Catch two compiler warnings in sieve.c.
3653 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3654 function verify_get_ident() calls ip_connect() to connect a socket, but
3655 if the "connect()" function timed out, ip_connect() used to close the
3656 socket. However, verify_get_ident() also closes the socket later, and in
3657 between Exim writes to the log, which may get opened at this point. When
3658 the socket was closed in ip_connect(), the log could get the same file
3659 descriptor number as the socket. This naturally causes chaos. The fix is
3660 not to close the socket in ip_connect(); the socket should be closed by
3661 the function that creates it. There was only one place in the code where
3662 this was missing, in the iplookup router, which I don't think anybody now
3663 uses, but I've fixed it anyway.
3665 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3666 well as to direct DNS lookups. Otherwise the handling of names in host
3667 lists is inconsistent and therefore confusing.
3673 PH/01 Two changes to the default runtime configuration:
3675 (1) Move the checks for relay_from_hosts and authenticated clients from
3676 after to before the (commented out) DNS black list checks.
3678 (2) Add control=submission to the relay_from_hosts and authenticated
3679 clients checks, on the grounds that messages accepted by these
3680 statements are most likely to be submissions.
3682 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3684 (1) Generate an error if the third argument for the ${prvs expansion is
3687 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3690 (3) Reset the variables that are obtained from the first argument of
3691 ${prvscheck and used in the second argument before leaving the code,
3692 because their memory is reclaimed, so using them afterwards may do
3695 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3696 one (it's much easier than Tom thought :-).
3698 (5) Because of (4), we can now allow for the use of $prvscheck_result
3699 inside the third argument.
3701 PH/03 For some reason, the default setting of PATH when running a command from
3702 a pipe transport was just "/usr/bin". I have changed it to
3705 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3706 anything to be listed in the output from -bV.
3708 PH/05 When a filter generated an autoreply, the entire To: header line was
3709 quoted in the delivery log line, like this:
3711 => >A.N.Other <ano@some.domain> <original@ddress> ...
3713 This has been changed so that it extracts the operative address. There
3714 may be more than one such address. If so, they are comma-separated, like
3717 => >ano@some.domain,ona@other.domain <original@ddress> ...
3719 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3720 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3721 not being looked up in the rDNS to get a host name, Exim was showing the
3722 IP address twice in Received: lines, even though the IP addresses were
3723 identical. For example:
3725 Received: from [1.2.3.4] (helo=[1.2.3.4])
3727 However, if the real host name was known, it was omitting the HELO data
3728 if it matched the actual IP address. This has been tidied up so that it
3729 doesn't show the same IP address twice.
3731 PH/07 When both +timestamp and +memory debugging was on, the value given by
3732 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3733 called by the debug printing, thereby overwriting the timestamp buffer.
3734 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3736 PH/08 When the original message was included in an autoreply transport, it
3737 always said "this is a copy of the message, including all the headers",
3738 even if body_only or headers_only was set. It now gives an appropriate
3741 PH/09 Applied a patch from the Sieve maintainer which:
3743 o fixes some comments
3744 o adds the (disabled) notify extension core
3745 o adds some debug output for the result of if/elsif tests
3746 o points to the current vacation draft in the documentation
3747 and documents the missing references header update
3751 o fixes a bug in processing the envelope test (when testing
3752 multiple envelope elements, the last element determined the
3755 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3756 Electronic Mail") by including:
3758 Auto-submitted: auto-generated
3760 in the messages that it generates (bounce messages and others, such as
3761 warnings). In the case of bounce messages for non-SMTP messages, there was
3762 also a typo: it was using "Auto_submitted" (underscore instead of
3763 hyphen). Since every message generated by Exim is necessarily in response
3764 to another message, thes have all been changed to:
3766 Auto-Submitted: auto-replied
3768 in accordance with these statements in the RFC:
3770 The auto-replied keyword:
3772 - SHOULD be used on messages sent in direct response to another
3773 message by an automatic process,
3775 - MUST NOT be used on manually-generated messages,
3777 - MAY be used on Delivery Status Notifications (DSNs) and Message
3778 Disposition Notifications (MDNs),
3780 - MUST NOT be used on messages generated by automatic or periodic
3781 processes, except for messages which are automatic responses to
3784 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3785 to the default Received: header definition.
3787 PH/12 Added log selector acl_warn_skipped (default on).
3789 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3790 variables because (a) they are in the wrong storage pool and (b) even if
3791 they were copied, it wouldn't work properly because of the caching.
3793 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3794 checking when decoding. Apparently there are clients that generate
3795 overlong encoded strings. Why am I not surprised?
3797 PH/15 If the first argument of "${if match_address" was not empty, but did not
3798 contain an "@" character, Exim crashed. Now it writes a panic log message
3799 and treats the condition as false.
3801 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3803 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3804 extension "envelope-auth". The code is finished and in agreement with
3805 other implementations, but there is no documentation so far and in fact,
3806 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3807 not changing the active code.
3809 Print executed "if" and "elsif" statements when debugging is used. This
3810 helps a great deal to understand what a filter does.
3812 Document more things not specified clearly in RFC3028. I had all this
3813 sorted out, when out of a sudden new issues came to my mind. Oops."
3815 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3818 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3819 canonical form (as documented). However, after a host name lookup from
3820 the IP address, check_host() was doing a simple string comparison with
3821 addresses acquired from the DNS when checking that the found name did
3822 have the original IP as one of its addresses. Since any found IPv6
3823 addresses are likely to be in abbreviated form, the comparison could
3824 fail. Luckily, there already exists a function for doing the comparison
3825 by converting both addresses to binary, so now that is used instead of
3826 the text comparison.
3828 PH/20 There was another similar case to PH/19, when a complete host name was
3829 given in a host list; looking up its IP address could give an abbreviated
3830 form, whereas the current host's name might or might not be abbreviated.
3831 The same fix has been applied.
3837 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3838 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3841 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3842 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3844 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3846 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3847 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3848 Also, for "Auto-Submitted", treat anything other than "no" as
3849 non-personal, in accordance with RFC 3834. (Previously it treated
3850 anything starting "auto-" as non-personal.)
3852 TF/01 The control=submission/name=... option had a problem with syntax
3853 errors if the name included a slash character. The /name= option
3854 now slurps the rest of the string, so it can include any characters
3855 but it must come last in the list of options (after /sender_retain
3858 PH/05 Some modifications to the interface to the fake nameserver for the new
3866 TK/01 Added the "success_on_redirect" address verification option. See
3867 NewStuff for rationale and an example.
3869 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3871 PH/02 Patch to exigrep to allow it to work on syslog lines.
3873 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3874 fread() to skip over the body file's header line, because in Cygwin the
3875 header line is locked and is inaccessible.
3877 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3878 co-exist for some time) to make it clear that it is the Exim ID that is
3879 referenced, not the Message-ID: header line.
3881 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3882 string_format() function, because snprintf() does not exist on all
3885 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3886 ${stat: expansion item.
3888 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3889 protocol synchronization error", to keep the pedants happy.
3891 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3892 well as for IRIX systems, when gcc is being used. See the host.c source
3895 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3897 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3900 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3901 transport and to the smtp transport in LMTP mode.
3903 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3905 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3906 run a filter in a subprocess. This could lead to confusion in subsequent
3907 lookups in the parent process. There should also be a search_tidyup() at
3908 the end of the subprocess.
3910 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3911 only if the host matched helo_try_verify_hosts, which caused the
3912 verification to occur when the EHLO/HELO command was issued. The ACL just
3913 tested the remembered result. Now, if a previous verification attempt has
3914 not happened, "verify = helo" does it there and then.
3916 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3918 TK/03 Fix log output including CR from clamd.
3920 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3921 exist provoked a memory error which could cause a segfault.
3923 PH/15 Installed PCRE 6.2
3925 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3927 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3928 of the problem. Specifically, suggested +O2 rather than +O1 for the
3931 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3933 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3934 record, the port was not correctly logged when the outgoing_port log
3935 selector was set (it logged the transort's default port).
3937 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3938 fallback_hosts, and "hosts" in the smtp transport.
3940 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3941 host errors such as "Connection refused".
3943 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3944 authentication with radiusclient 0.4.9:
3946 - Error returned from rc_read_config was caught wrongly
3947 - Username/password not passed on to radius server due to wrong length.
3949 The presumption is that some radiusclient API changes for 4.51/PH/17
3950 were not taken care of correctly. The code is still untested by me (my
3951 Linux distribution still has 0.3.2 of radiusclient), but it was
3952 contributed by a Radius user.
3954 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3955 expanding the "port" option of the smtp transport.
3957 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3958 while reading a MIME header. Thanks to Tom Hughes for a patch.
3960 PH/24 Include config.h inside local_scan.h so that configuration settings are
3963 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3964 that in an ACL for RCPT (for example), you can examine exactly what was
3967 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3968 commands, but it was not correctly comparing the address with the actual
3969 client host address. Thus, it would show the EHLO address in Received:
3970 header lines when this was not necessary.
3972 PH/27 Added the % operator to ${eval:}.
3974 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3975 it should be ignoring failures (because with -C, for example, it has lost
3976 privilege). It wasn't ignoring creation failures other than "already
3979 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3982 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3983 because an input line was too long, either on its own, or by virtue of
3984 too many continuations, the temporary file was not being removed, and the
3985 return code was incorrect.
3987 PH/31 Missing "BOOL" in function definition in filtertest.c.
3989 PH/32 Applied Sieve patches from the maintainer.
3991 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3993 PH/33 Added "verify = not_blind".
3995 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3996 Local/Makefile (with some defaults set). These are used in built scripts
3997 such as exicyclog, but they have never been used in the exim_install
3998 script (though there are many overriding facilities there). I have
3999 arranged that the exim_install script now takes note of these two
4002 PH/35 Installed configuration files for Dragonfly.
4004 PH/36 When a locally submitted message by a trusted user did not contain a
4005 From: header, and the sender address was obtained from -f or from an SMTP
4006 MAIL command, and the trusted user did not use -F to supply a sender
4007 name, $originator_name was incorrectly used when constructing a From:
4008 header. Furthermore, $originator_name was used for submission mode
4009 messages from external hosts without From: headers in a similar way,
4010 which is clearly wrong.
4012 PH/37 Added control=suppress_local_fixups.
4014 PH/38 When log_selector = +received_sender was set, and the addition of the
4015 sender made the log line's construction buffer exactly full, or one byte
4016 less than full, an overflow happened when the terminating "\n" was
4019 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4020 when the result of a list match is failure because a DNS lookup failed.
4022 PH/40 RM_COMMAND is now used in the building process.
4024 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4025 the "build-* directories that it finds.
4027 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4028 address in a domain literal was a prefix of an interface address.
4030 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4031 when verifying a sender address, unless rewrite_headers is false.
4033 PH/44 Wrote a long comment about why errors_to addresses are verified as
4034 recipients, not senders.
4036 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4037 the ratelimit ACL was added.
4039 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4041 PH/46 Added extra information about PostgreSQL errors to the error string.
4043 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4044 avoiding the need to install special zones in a real server. This is
4045 backwards compatible; if it can't find the fake resolver, it drops back.
4046 Thus, both old and new test suites can be run.
4048 TF/02 Added util/ratelimit.pl
4050 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4051 clock is set back in time.
4053 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4054 Candler <B.Candler@pobox.com>.
4056 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4057 OK for addresses that are the result of redirections.
4059 PH/48 A number of further additions for the benefit of the new test suite,
4060 including a fake gethostbyname() that interfaces to the fake DNS resolver
4063 TF/06 The fix for widen_domains has also been applied to qualify_single and
4064 search_parents which are the other dnslookup options that can cause
4067 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4070 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4072 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4073 service" if it encountered an MX record with an empty target hostname.
4074 The message is now "an MX or SRV record indicated no SMTP service".
4076 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4077 if the DNS of the sending site is misconfigured. This is quite a
4078 common situation. This change restores the behaviour of treating a
4079 helo verification defer as a failure.
4081 PH/51 If self=fail was set on a router, the bounce message did not include the
4082 actual error message.
4088 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4090 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4091 command itself ended in error, the underlying message about the transport
4092 filter timeout was being overwritten with the pipe command error. Now the
4093 underlying error message should be appended to the second error message.
4095 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4097 PH/02 Reduce the amount of output that "make" produces by default. Full output
4098 can still be requested.
4100 PH/03 The warning log line about a condition test deferring for a "warn" verb
4101 was being output only once per connection, rather than after each
4102 occurrence (because it was using the same function as for successful
4103 "warn" verbs). This seems wrong, so I have changed it.
4105 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4106 it should not have, which might have caused a crash in the right
4107 circumstances, but probably never did.
4109 PH/04 Installed a modified version of Tony Finch's patch to make submission
4110 mode fix the return path as well as the Sender: header line, and to
4111 add a /name= option so that you can make the user's friendly name appear
4114 TF/03 Added the control = fakedefer ACL modifier.
4116 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4117 Mark Lowes for thorough testing.
4119 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4121 TK/03 Merged latest SRS patch from Miles Wilton.
4123 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4124 with the definition in sysexits.h (which is #included earlier).
4125 Fortunately, Exim does not actually use EX_OK. The code used to try to
4126 preserve the sysexits.h value, by assuming that macro definitions were
4127 scanned for macro replacements. I have been disabused of this notion,
4128 so now the code just undefines EX_OK before #including unistd.h.
4130 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4131 in the smtp transport. When a block could not be written in a single
4132 write() function, the timeout was being re-applied to each part-write.
4133 This seems wrong - if the receiver was accepting one byte at a time it
4134 would take for ever. The timeout is now adjusted when this happens. It
4135 doesn't have to be particularly precise.
4137 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4138 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4140 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4141 without a domain if the check to <postmaster@domain> fails.
4143 SC/01 Eximstats: added -xls and the ability to specify output files
4144 (patch written by Frank Heydlauf).
4146 SC/02 Eximstats: use FileHandles for outputting results.
4148 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4150 SC/04 Eximstats: fixed display of large numbers with -nvr option
4152 SC/05 Eximstats: fixed merging of reports with empty tables.
4154 SC/06 Eximstats: added the -include_original_destination flag
4156 SC/07 Eximstats: removed tabs and trailing whitespace.
4158 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4160 TK/06 MBOX spool code: Add real "From " MBOX separator line
4161 so the .eml file is really in mbox format (even though
4162 most programs do not really care). Patch from Alex Miller.
4164 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4165 The latter is generated from $received_to and is only set if the
4166 message has one envelope recipient. SA can use these headers,
4167 obviously out-of-the-box. Patch from Alex Miller.
4169 PH/08 The ${def test on a variable was returning false if the variable's
4170 value was "0", contrary to what the specification has always said!
4171 The result should be true unless the variable is empty.
4173 PH/09 The syntax error of a character other than { following "${if
4174 def:variable_name" (after optional whitespace) was not being diagnosed.
4175 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4176 accidental colon was present, for example, could give incorrect results.
4178 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4179 result is used (not including appendfile, where other changes are about
4182 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4183 This involved changing a lot of size variables from int to off_t. It
4184 should work with maildirs and everything.
4186 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4187 spamd dying while we are connected to it.
4189 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4192 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4193 function for BDB 4.3.
4195 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4197 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4198 the sources for PCRE have been re-arranged and more files are now
4201 PH/15 The code I had for printing potentially long long variables in PH/11
4202 above was not the best (it lost precision). The length of off_t variables
4203 is now inspected at build time, and an appropriate printing format (%ld
4204 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4205 to be "long long int" or "long int". This is needed for the internal
4206 formatting function string_vformat().
4208 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4209 the configuration file to be ":syslog", then the script "guesses" where
4210 the logs files are, rather than using the compiled in default. In our
4211 case the guess is not the same as the compiled default, so the script
4212 suddenly stopped working when I started to use syslog. The patch checks
4213 to see if log_file_path is "". If so, it attempts to read it from exim
4214 with no configuration file to get the compiled in version, before it
4215 falls back to the previous guessing code."
4217 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4218 implementing BATV in an Exim configuration. See NewStuff for the gory
4221 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4222 Makefile that are specific to HP-UX.
4224 PH/18 If the "use_postmaster" option was set for a recipient callout together
4225 with the "random" option, the postmaster address was used as the MAIL
4226 FROM address for the random test, but not for the subsequent recipient
4227 test. It is now used for both.
4229 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4230 patch removes a few documentation additions to RFC 3028, because the
4231 latest draft now contains them. It adds the new en;ascii-case comparator
4232 and a new error check for 8bit text in MIME parts. Comparator and
4233 require names are now matched exactly. I enabled the subaddress
4234 extension, but it is not well tested yet (read: it works for me)."
4236 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4237 rework some of the code of TK/09 above to avoid the hardwired use of
4238 "%lld" and "long long". Replaced the call to snprintf() with a call to
4241 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4242 records point to non-existent hosts", "retry timeout exceeded", and
4243 "retry time not reached for any host after a long failure period".
4245 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4246 experimental DomainKeys support:
4248 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4249 (2) On an error such as an illegally used "control", the wrong name for
4250 the control was given.
4252 These problems did NOT occur unless DomainKeys support was compiled.
4254 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4256 PH/24 Added ${if match_ip condition.
4258 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4259 databases so that it will be absolutely obvious if a crash occurs in the
4260 DB library. This is a regular occurrence (often caused by mis-matched
4263 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4264 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4265 picked up on a user's system that detects such things. There doesn't seem
4266 to be a gcc warning option for this - only an attribute that has to be
4267 put on the function's prototype. It seems that in Fedora Core 4 they have
4268 set this on a number of new functions. No doubt there will be more in due
4271 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4272 specify a transport. However, if an address that was verified by such a
4273 router was the subject of a callout, Exim crashed because it tried to
4274 read the rcpt_include_affixes from the non-existent transport. Now it
4275 just assumes that the setting of that option is false. This bug was
4276 introduced by 4.51/PH/31.
4278 PH/28 Changed -d+all to exclude +memory, because that information is very
4279 rarely of interest, but it makes the output a lot bigger. People tend to
4280 do -d+all out of habit.
4282 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4283 code in os-type was giving problems when libc.so lives in lib64, like on
4286 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4287 aren't the modern standard, and it seems that some systems' include files
4288 don't always have them. Exim was already checking for some of the newer
4289 ones like T_AAAA, and defining it itself. I've added checks for all the
4290 record types that Exim uses.
4292 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4293 not automatically generating a new one, as it is supposed to. This
4294 prevented TLS from working. If the file did exist, but contained invalid
4295 data, a new version was generated, as expected. It was only the case of a
4296 non-existent file that was broken.
4298 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4299 with a change in libdomainkeys > 0.64.
4301 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4302 from DNS. If the selector record carries the flag, it now has
4303 precedence over the domain-wide flag.
4305 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4307 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4308 the use of a port name that isn't defined in /etc/services) occurred, the
4309 message was deferred as in a normal delivery, and thus remained on the
4310 spool, instead of being failed because of the mua_wrapper setting. This
4311 is now fixed, and I tidied up some of the mua_wrapper messages at the
4314 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4315 the messages in a hash of arrays rather than using individual hashes.
4316 This is a bit cleaner and results in dramatic memory savings, albeit
4317 at a slight CPU cost.
4319 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4320 as requested by Marc Sherman.
4322 SC/10 Eximstats: added histograms for user specified patterns as requested
4325 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4327 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4328 fopen() in the content-scanning modules that did not already have it.
4334 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4335 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4337 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4339 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4341 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4342 to test Sieve filters that use "vacation".
4344 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4345 that changes the way the GnuTLS parameters are stored in the cache file.
4346 The new format can be generated externally. For backward compatibility,
4347 if the data in the cache doesn't make sense, Exim assumes it has read an
4348 old-format file, and it generates new data and writes a new file. This
4349 means that you can't go back to an older release without removing the
4352 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4353 work if there are any delivery delays because "one_time" forces the
4354 parent to be marked "delivered", so its unseen clone is never tried
4355 again. For this reason, Exim now forbids the simultaneous setting of
4358 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4359 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4360 entry if you want to know the details. The fix, however, neglected to
4361 consider the case when local delivery batching is involved. The test for
4362 "previously delivered" was not happening when checking to see if an
4363 address could be batched with a previous (undelivered) one; under
4364 certain circumstances this could lead to multiple deliveries to the same
4367 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4368 in its include files, and this causes problems building Exim.
4370 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4371 header_syntax) but Exim was just ignoring anything given after a slash.
4372 In particular, this caused confusion with an attempt to use "verify =
4373 reverse_host_lookup/defer_ok". An error is now given when options are
4374 supplied for verify items that do not have them. (Maybe reverse_host_
4375 lookup should have a defer_ok option, but that's a different point.)
4377 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4378 defined by RFC 821) to 2048, because there were problems with some AUTH
4379 commands, and RFC 1869 says the size should be increased for extended
4380 SMTP commands that take arguments.
4382 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4385 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4386 "unknown" error; now it says that the functionality isn't in the binary.
4388 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4389 an address' error message when a string expansion fails (syntax or
4390 whatever). Otherwise the password may appear in the log. Following change
4391 PH/42 below, there is no longer a chance of it appearing in a bounce
4394 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4396 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4397 of its addresses was ever tried. (Bugzilla bug #2.)
4399 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4400 the result incorrectly in the debug output. (It correctly added a newline
4401 to what was transported.)
4403 TF/01 Added $received_time.
4405 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4406 commented out examples of how to interface to a virus scanner and to
4407 SpamAssassin. Also added commented examples of av_scanner and
4408 spamd_address settings.
4410 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4411 and controls are allowed in which ACLs. There were a couple of minor
4412 errors. Some of the entries in the conditions table (which is a table of
4413 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4414 negation of where the condition IS allowed.
4416 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4418 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4419 header file does not have a version number, so I've had to invent a new
4420 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4421 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4422 radiusclient), but it was contributed by a Radius user.
4424 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4425 files or directories, for OpenSSL.
4427 PH/19 When an Exim process that is running as root has to create an Exim log
4428 file, it does so in a subprocess that runs as exim:exim so as to get the
4429 ownership right at creation (otherwise, other Exim processes might see
4430 the file with the wrong ownership). There was no test for failure of this
4431 fork() call, which would lead to the process getting stuck as it waited
4432 for a non-existent subprocess. Forks do occasionally fail when resources
4433 run out. I reviewed all the other calls to fork(); they all seem to check
4436 PH/20 When checking for unexpected SMTP input at connect time (before writing
4437 the banner), Exim was not dealing correctly with a non-positive return
4438 from the read() function. If the client had disconnected by this time,
4439 the result was a log entry for a synchronization error with an empty
4440 string after "input=" when read() returned zero. If read() returned -1
4441 (an event I could not check), uninitialized data bytes were printed.
4442 There were reports of junk text (parts of files, etc) appearing after
4445 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4447 PH/22 Added support for macro redefinition, and (re)definition in between
4448 driver and ACL definitions.
4450 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4451 forgetting to use the resulting value; it was using the unexpanded value.
4453 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4454 hadn't been configured. The fix is from Juergen Kreileder, who
4455 understands it better than I do:
4457 "Here's what I see happening with three configured cyrus_sasl
4458 authenticators configured (plain, login, cram-md5):
4460 On startup auth_cyrus_sasl_init() gets called for each of these.
4461 This means three calls to sasl_listmech() without a specified mech_list.
4462 => SASL tests which mechs of all available mechs actually work
4463 => three warnings about OTP not working
4464 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4466 With the patch, sasl_listmech() also gets called three times. But now
4467 SASL's mech_list option is set to the server_mech specified in the the
4468 authenticator. Or in other words, the answer from sasl_listmech()
4469 gets limited to just the mech you're testing for (which is different
4471 => the return list contains just 'plain' or 'login', 'cram-md5' or
4472 nothing depending on the value of ob->server_mech.
4474 I've just tested the patch: Authentication still works fine,
4475 unavailable mechs specified in the exim configuration are still
4476 caught, and the auth.log warnings about OTP are gone."
4478 PH/25 When debugging is enabled, the contents of the command line are added
4479 to the debugging output, even when log_selector=+arguments is not
4482 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4483 answer is "GNU", and only if the return is "GNU/something" is the answer
4486 PH/27 $acl_verify_message is now set immediately after the failure of a
4487 verification in an ACL, and so is available in subsequent modifiers. In
4488 particular, the message can be preserved by coding like this:
4490 warn !verify = sender
4491 set acl_m0 = $acl_verify_message
4493 Previously, $acl_verify_message was set only while expanding "message"
4494 and "log_message" when a very denied access.
4496 PH/28 Modified OS/os.c-Linux with
4498 -#ifndef OS_LOAD_AVERAGE
4499 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4501 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4502 nomenclature these days.)
4504 PH/29 Installed patch from the Sieve maintainer that adds the options
4505 sieve_useraddress and sieve_subaddress to the redirect router.
4507 PH/30 In these circumstances:
4508 . Two addresses routed to the same list of hosts;
4509 . First host does not offer TLS;
4510 . First host accepts first address;
4511 . First host gives temporary error to second address;
4512 . Second host offers TLS and a TLS session is established;
4513 . Second host accepts second address.
4514 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4515 and peerdn, if requested) that were in fact used only for the second
4518 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4519 attention to any local part prefix or suffix that was matched by the
4520 router that accepted the address. It now behaves in the same way as it
4521 does for delivery: the affixes are removed from the local part unless
4522 rcpt_include_affixes is set on the transport.
4524 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4525 timeout during the DATA phase of an incoming message.
4527 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4528 applied a patch sanctioned by the Sieve maintainer.
4530 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4531 the uid or gid is negative. A case of a negative gid caused this to be
4532 noticed. The fix allows for either to be negative.
4534 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4535 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4538 PH/36 The change PH/12 above was broken. Fixed it.
4540 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4541 the grounds that routing the same address twice would always produce the
4542 same answer. This might have been true once, but it is certainly no
4543 longer true now. Routing a child address may depend on the previous
4544 routing that produced that child. Some complicated redirection strategies
4545 went wrong when messages had multiple recipients, and made Exim's
4546 behaviour dependent on the order in which the addresses were given.
4548 I have moved the duplicate checking until after the routing is complete.
4549 Exim scans the addresses that are assigned to local and remote
4550 transports, and removes any duplicates. This means that more work will be
4551 done, as duplicates will always all be routed, but duplicates are
4552 presumably rare, so I don't expect this is of any significance.
4554 For deliveries to pipes, files, and autoreplies, the duplicate checking
4555 still happens during the routing process, since they are not going to be
4558 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4559 It corrects a timeout issue with spamd. This is Ian's comment: "The
4560 background is that sometimes spamd either never reads data from a
4561 connection it has accepted, or it never writes response data. The exiscan
4562 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4563 blindly assumes that writes won't block so it may never time out."
4565 PH/39 Allow G after quota size as well as K and M.
4567 PH/40 The value set for $authenticated_id in an authenticator may not contain
4568 binary zeroes or newlines because the value is written to log lines and
4569 to spool files. There was no check on this. Now the value is run through
4570 the string_printing() function so that such characters are converted to
4571 printable escape sequences.
4573 PH/41 $message_linecount is a new variable that contains the total number of
4574 lines in the message. Compare $body_linecount, which is the count for the
4577 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4578 bounce and delay warning messages, except in certain special cases, which
4581 (a) An SMTP error message from a remote host;
4582 (b) A message specified in a :fail: redirection;
4583 (c) A message specified in a "fail" command in a system filter;
4584 (d) A message specified in a FAIL return from the queryprogram router;
4585 (e) A message specified by the cannot_route_message router option.
4587 In these cases only, Exim does include the error details in bounce and
4588 warning messages. There are also a few cases where bland messages such
4589 as "unrouteable address" or "local delivery error" are given.
4591 PH/43 $value is now also set for the "else" part of a ${run expansion.
4593 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4594 being worked on, but at least Exim now implements the latest version to
4597 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4598 process to complete was treated as a delivery failure, a timeout while
4599 writing the message to the pipe was logged, but erroneously treated as a
4600 successful delivery. Such timeouts include transport filter timeouts. For
4601 consistency with the overall process timeout, these timeouts are now
4602 treated as errors, giving rise to delivery failures by default. However,
4603 there is now a new Boolean option for the pipe transport called
4604 timeout_defer, which, if set TRUE, converts the failures into defers for
4605 both kinds of timeout. A transport filter timeout is now identified in
4608 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4609 systems where "make" and "gmake" are different, calling "gmake" at top
4610 level broke things. I've arranged for the value of $(MAKE) to be passed
4611 from the Makefile to this script so that it can call the same version of
4615 A note about Exim versions 4.44 and 4.50
4616 ----------------------------------------
4618 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4619 changes of various kinds. As a consequence, a big documentation update was
4620 needed. This delayed the release for rather longer than seemed good, especially
4621 in the light of a couple of (minor) security issues. Therefore, the changes
4622 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4623 release. So 4.44 and 4.50 are in effect two different branches that both start
4626 I have left the 4.50 change log unchanged; it contains all the changes since
4627 4.43. The change log for 4.44 is below; many of its items are identical to
4628 those for 4.50. This seems to be the most sensible way to preserve the
4629 historical information.
4635 1. Minor wording change to the doc/README.SIEVE file.
4637 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4638 computation of the current number of files was incorrect.
4640 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4641 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4644 4. Give more explanation in the error message when the command for a transport
4645 filter fails to execute.
4647 5. There are several places where Exim runs a non-Exim command in a
4648 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4649 was being done only for the command run by the queryprogram router. It is
4650 now done for all such subprocesses. The other cases are: ${run, transport
4651 filters, and the commands run by the lmtp and pipe transports.
4653 6. Added CONFIGURE_GROUP build-time option.
4655 7. Some older OS have a limit of 256 on the maximum number of file
4656 descriptors. Exim was using setrlimit() to set 1000 as a large value
4657 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4658 systems. I've change it so that if it can't get 1000, it tries for 256.
4660 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4661 was an oversight, and furthermore, ever since the addition of extra
4662 controls (e.g. 4.43/32), the checks on when to allow different forms of
4663 "control" were broken. There should now be diagnostics for all cases when a
4664 control that does not make sense is encountered.
4666 9. Added the /retain_sender option to "control=submission".
4668 10. $recipients is now available in the predata ACL (oversight).
4670 11. Tidy the search cache before the fork to do a delivery from a message
4671 received from the command line. Otherwise the child will trigger a lookup
4672 failure and thereby defer the delivery if it tries to use (for example) a
4673 cached ldap connection that the parent has called unbind on.
4675 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4676 of $address_data from the recipient verification was clobbered by the
4677 sender verification.
4679 13. The value of address_data from a sender verification is now available in
4680 $sender_address_data in subsequent conditions in the ACL statement.
4682 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4684 15. Added a new option "connect=<time>" to callout options, to set a different
4687 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4688 was its contents. (It was OK if the option was not defined at all.)
4690 17. A "Completed" log line is now written for messages that are removed from
4691 the spool by the -Mrm option.
4693 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4694 information about exactly what failed.
4696 19. Added -dd to debug only the daemon process.
4698 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4699 handles timeouts, both on the server side and network timeouts. Renamed the
4700 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4702 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4703 It is now set to "smtps".
4705 22. $host_address is now set to the target address during the checking of
4706 ignore_target_hosts.
4708 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4709 being passed; this would have caused $sender_host_name to have been used if
4710 matching the list had actually called for a host name (not very likely,
4711 since this list is usually IP addresses). A host name is now passed as
4714 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4715 code that specifies a non-restarting handler (typically sigaction() in
4716 modern systems) in an attempt to fix a rare and obscure crash bug.
4718 25. Narrowed the window for a race in the daemon that could cause it to ignore
4719 SIGCHLD signals. This is not a major problem, because they are used only to
4720 wake it up if nothing else does.
4722 26. A malformed maildirsize file could cause Exim to calculate negative values
4723 for the mailbox size or file count. Odd effects could occur as a result.
4724 The maildirsize information is now recalculated if the size or filecount
4727 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4728 support for a long time. Removed HAVE_SYS_VFS_H.
4730 28. Installed the latest version of exipick from John Jetmore.
4732 29. In an address list, if the pattern was not a regular expression, an empty
4733 subject address (from a bounce message) matched only if the pattern was an
4734 empty string. Non-empty patterns were not even tested. This was the wrong
4735 because it is perfectly reasonable to use an empty address as part of a
4736 database query. An empty address is now tested by patterns that are
4737 lookups. However, all the other forms of pattern expect the subject to
4738 contain a local part and a domain, and therefore, for them, an empty
4739 address still always fails if the pattern is not itself empty.
4741 30. Exim went into a mad DNS loop when attempting to do a callout where the
4742 host was specified on an smtp transport, and looking it up yielded more
4743 than one IP address.
4745 31. Re-factored the code for checking spool and log partition space into a
4746 function that finds that data and another that does the check. The former
4747 is then used to implement four new variables: $spool_space, $log_space,
4748 $spool_inodes, and $log_inodes.
4750 32. The RFC2047 encoding function was originally intended for short strings
4751 such as real names; it was not keeping to the 75-character limit for
4752 encoded words that the RFC imposes. It now respects the limit, and
4753 generates multiple encoded words if necessary. To be on the safe side, I
4754 have increased the buffer size for the ${rfc2047: expansion operator from
4757 33. It is now permitted to omit both strings after an "if" condition; if the
4758 condition is true, the result is "true". As before, when the second string
4759 is omitted, a false condition yields an empty string. This makes it less
4760 cumbersome to write custom ACL and router conditions.
4762 34. Failure to deliver a bounce message always caused it to be frozen, even if
4763 there was an errors_to setting on the router. The errors_to setting is now
4766 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4767 canonical form (fully expanded) before being placed in
4768 $sender_host_address.
4770 36. The table in the code that translates DNS record types into text (T_A to
4771 "A" for instance) was missing entries for NS and CNAME. It is just possible
4772 that this could have caused confusion if both these types were looked up
4773 for the same domain, because the text type is used as part of Exim's
4774 per-process caching. But the chance of anyone hitting this buglet seems
4777 37. The dnsdb lookup has been extended in a number of ways.
4779 (1) There is a new type, "zns", which walks up the domain tree until it
4780 finds some nameserver records. It should be used with care.
4782 (2) There is a new type, "mxh", which is like "mx" except that it returns
4783 just the host names, not the priorities.
4785 (3) It is now possible to give a list of domains (or IP addresses) to be
4786 looked up. The behaviour when one of the lookups defers can be
4787 controlled by a keyword.
4789 (4) It is now possible to specify the separator character for use when
4790 multiple records are returned.
4792 38. The dnslists ACL condition has been extended: it is now possible to supply
4793 a list of IP addresses and/or domains to be looked up in a particular DNS
4796 39. Added log_selector=+queue_time_overall.
4798 40. When running the queue in the test harness, wait just a tad after forking a
4799 delivery process, to get repeatability of debugging output.
4801 41. Include certificate and key file names in error message when GnuTLS fails
4802 to set them up, because the GnuTLS error message doesn't include the name
4803 of the failing file when there is a problem reading it.
4805 42. Allow both -bf and -bF in the same test run.
4807 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4809 44. The "Exiscan patch" is now merged into the mainline Exim source.
4811 45. Sometimes the final signoff response after QUIT could fail to get
4812 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4813 < 0 before doing a fflush(). This bug looks as though it goes back to the
4814 introduction of TLS in release 3.20, but "sometimes" must have been rare
4815 because the tests only now provoked it.
4817 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4818 (this can affect the format of dates).
4820 47. exim_tidydb, when checking for the continued existence of a message for
4821 which it has found a message-specific retry record, was not finding
4822 messages that were in split spool directories. Consequently, it was
4823 deleting retry records that should have stayed in existence.
4825 48. Steve fixed some bugs in eximstats.
4827 49. The SPA authentication driver was not abandoning authentication and moving
4828 on to the next authenticator when an expansion was forced to fail,
4829 contradicting the general specification for all authenticators. Instead it
4830 was generating a temporary error. It now behaves as specified.
4832 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4833 (the order specifies the preference for clients). The order is now AES256,
4834 AES128, 3DES, ARCFOUR128.
4836 51. Small patch to Sieve code - explicitly set From: when generating an
4839 52. Exim crashed if a remote delivery caused a very long error message to be
4840 recorded - for instance if somebody sent an entire SpamAssassin report back
4841 as a large number of 550 error lines. This bug was coincidentally fixed by
4842 increasing the size of one of Exim's internal buffers (big_buffer) that
4843 happened as part of the Exiscan merge. However, to be on the safe side, I
4844 have made the code more robust (and fixed the comments that describe what
4847 53. Now that there can be additional text after "Completed" in log lines (if
4848 the queue_time_overall log selector is set), a one-byte patch to exigrep
4849 was needed to allow it to recognize "Completed" as not the last thing in
4852 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4853 patch that reportedly fixes this has been added. I am not expert enough to
4854 create a test for it. This is what the patch creator wrote:
4856 "I found a little strange behaviour of ldap code when working with
4857 Windows 2003 AD Domain, where users was placed in more than one
4858 Organization Units. When I tried to give exim partial DN, the exit code
4859 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4860 But simultaneously result of request was absolutely normal ldap result,
4861 so I produce this patch..."
4863 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4864 REFERENCE, so I have modified the code to exclude the patch when that macro
4867 55. Some experimental protocols are using DNS PTR records for new purposes. The
4868 keys for these records are domain names, not reversed IP addresses. The
4869 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4870 leaves it alone. Component reversal etc. now happens only for IP addresses.
4873 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4875 57. Double the size of the debug message buffer (to 2048) so that more of very
4876 long debug lines gets shown.
4878 58. The exicyclog utility now does better if the number of log files to keep
4879 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4881 59. Two changes related to the smtp_active_hostname option:
4883 (1) $smtp_active_hostname is now available as a variable.
4884 (2) The default for smtp_banner uses $smtp_active_hostname instead
4885 of $primary_hostname.
4887 60. The host_aton() function is supposed to be passed a string that is known
4888 to be a valid IP address. However, in the case of IPv6 addresses, it was
4889 not checking this. This is a hostage to fortune. Exim now panics and dies
4890 if the condition is not met. A case was found where this could be provoked
4891 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4892 components; fortuitously, this particular loophole had already been fixed
4893 by change 4.50/55 above.
4895 If there are any other similar loopholes, the new check in host_aton()
4896 itself should stop them being exploited. The report I received stated that
4897 data on the command line could provoke the exploit when Exim was running as
4898 exim, but did not say which command line option was involved. All I could
4899 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4900 running as the user.
4903 61. There was a buffer overflow vulnerability in the SPA authentication code
4904 (which came originally from the Samba project). I have added a test to the
4905 spa_base64_to_bits() function which I hope fixes it.
4908 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4909 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4911 63. The daemon start-up calls getloadavg() while still root for those OS that
4912 need the first call to be done as root, but it missed one case: when
4913 deliver_queue_load_max is set with deliver_drop_privilege. This is
4914 necessary for the benefit of the queue runner, because there is no re-exec
4915 when deliver_drop_privilege is set.
4917 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4918 This has been fixed.
4920 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4921 was in use, was not putting the data itself into the right store pool;
4922 consequently, it could be overwritten for a subsequent message in the same
4923 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4926 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4928 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4929 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4930 the function were treating the return as a boolean value, which happened to
4931 work because 0=false and not-0=true, but is not correct code.
4933 68. The host_aton() function was not handling scoped IPv6 addresses (those
4934 with, for example, "%eth0" on the end) correctly.
4936 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4937 negated items (that is, ~something) in unsigned ints. Some compilers
4938 apparently mutter when there is no cast.
4940 70. If an address verification called from an ACL failed, and did not produce a
4941 user-specific message (i.e. there was only a "system" message), nothing was
4942 put in $acl_verify_message. In this situation, it now puts the system
4945 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4946 session; change 4.31/43 added the unwanted input to the log line - except
4947 that it did not do this in the start of session case. It now does.
4949 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4950 This is wrong and can cause the other end to generate a synchronization
4951 error if it is another Exim or anything else that does the synchronization
4952 check. A QUIT command is no longer sent after a timeout.
4954 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4955 during host lookups.
4957 74. The defer_ok option of callout verification was not working if it was used
4958 when verifying addresses in header lines, that is, for this case:
4960 verify = header_sender/callout=defer_ok
4962 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4963 those file descriptors could be used for SMTP connections. If anything
4964 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4965 could be sent to the SMTP client, causing chaos. The daemon now opens
4966 stdin, stdout, and stderr to /dev/null when it puts itself into the
4969 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4970 log by default. The user can override this with suitable Perl magic.
4972 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4973 the log message when discard triggers, was not working for the DATA ACL or
4974 for the non-SMTP ACL.
4976 78. Error message wording change in sieve.c.
4978 79. If smtp_accept_max_per_host was set, the number of connections could be
4979 restricted to fewer than expected, because the daemon was trying to set up
4980 a new connection before checking whether the processes handling previous
4981 connections had finished. The check for completed processes is now done
4982 earlier. On busy systems, this bug wouldn't be noticed because something
4983 else would have woken the daemon, and it would have reaped the completed
4986 80. If a message was submitted locally by a user whose login name contained one
4987 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4988 It caused a spool format error. I have fixed the spool reading code. A
4989 related problem was that the "from" clause in the Received: line became
4990 illegal because of the space(s). It is now covered by ${quote_local_part.
4992 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4995 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4997 83. Patch from Sieve maintainer to fix unterminated string problem in
4998 "vacation" handling.
5000 84. Some minor changes to the Linux configuration files to help with other
5001 OS variants using glibc.
5003 85. One more patch for Sieve to update vacation handling to latest spec.
5006 ----------------------------------------------------
5007 See the note above about the 4.44 and 4.50 releases.
5008 ----------------------------------------------------
5014 1. Change 4.43/35 introduced a bug that caused file counts to be
5015 incorrectly computed when quota_filecount was set in an appendfile
5018 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5019 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5022 3. Give more explanation in the error message when the command for a transport
5023 filter fails to execute.
5025 4. There are several places where Exim runs a non-Exim command in a
5026 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5027 was being done only for the command run by the queryprogram router. It is
5028 now done for all such subprocesses. The other cases are: ${run, transport
5029 filters, and the commands run by the lmtp and pipe transports.
5031 5. Some older OS have a limit of 256 on the maximum number of file
5032 descriptors. Exim was using setrlimit() to set 1000 as a large value
5033 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5034 systems. I've change it so that if it can't get 1000, it tries for 256.
5036 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5037 was an oversight, and furthermore, ever since the addition of extra
5038 controls (e.g. 4.43/32), the checks on when to allow different forms of
5039 "control" were broken. There should now be diagnostics for all cases when a
5040 control that does not make sense is encountered.
5042 7. $recipients is now available in the predata ACL (oversight).
5044 8. Tidy the search cache before the fork to do a delivery from a message
5045 received from the command line. Otherwise the child will trigger a lookup
5046 failure and thereby defer the delivery if it tries to use (for example) a
5047 cached ldap connection that the parent has called unbind on.
5049 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5050 of $address_data from the recipient verification was clobbered by the
5051 sender verification.
5053 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5054 was its contents. (It was OK if the option was not defined at all.)
5056 11. A "Completed" log line is now written for messages that are removed from
5057 the spool by the -Mrm option.
5059 12. $host_address is now set to the target address during the checking of
5060 ignore_target_hosts.
5062 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5063 being passed; this would have caused $sender_host_name to have been used if
5064 matching the list had actually called for a host name (not very likely,
5065 since this list is usually IP addresses). A host name is now passed as
5068 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5069 code that specifies a non-restarting handler (typically sigaction() in
5070 modern systems) in an attempt to fix a rare and obscure crash bug.
5072 15. Narrowed the window for a race in the daemon that could cause it to ignore
5073 SIGCHLD signals. This is not a major problem, because they are used only to
5074 wake it up if nothing else does.
5076 16. A malformed maildirsize file could cause Exim to calculate negative values
5077 for the mailbox size or file count. Odd effects could occur as a result.
5078 The maildirsize information is now recalculated if the size or filecount
5081 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5082 support for a long time. Removed HAVE_SYS_VFS_H.
5084 18. Updated exipick to current release from John Jetmore.
5086 19. Allow an empty sender to be matched against a lookup in an address list.
5087 Previously the only cases considered were a regular expression, or an
5090 20. Exim went into a mad DNS lookup loop when doing a callout where the
5091 host was specified on the transport, if the DNS lookup yielded more than
5094 21. The RFC2047 encoding function was originally intended for short strings
5095 such as real names; it was not keeping to the 75-character limit for
5096 encoded words that the RFC imposes. It now respects the limit, and
5097 generates multiple encoded words if necessary. To be on the safe side, I
5098 have increased the buffer size for the ${rfc2047: expansion operator from
5101 22. Failure to deliver a bounce message always caused it to be frozen, even if
5102 there was an errors_to setting on the router. The errors_to setting is now
5105 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5106 canonical form (fully expanded) before being placed in
5107 $sender_host_address.
5109 24. Updated eximstats to version 1.33
5111 25. Include certificate and key file names in error message when GnuTLS fails
5112 to set them up, because the GnuTLS error message doesn't include the name
5113 of the failing file when there is a problem reading it.
5115 26. Expand error message when OpenSSL has problems setting up cert/key files.
5118 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5119 (this can affect the format of dates).
5121 28. exim_tidydb, when checking for the continued existence of a message for
5122 which it has found a message-specific retry record, was not finding
5123 messages that were in split spool directories. Consequently, it was
5124 deleting retry records that should have stayed in existence.
5126 29. eximstats updated to version 1.35
5127 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5128 1.35 - bugfix such that pie charts by volume are generated correctly
5130 30. The SPA authentication driver was not abandoning authentication and moving
5131 on to the next authenticator when an expansion was forced to fail,
5132 contradicting the general specification for all authenticators. Instead it
5133 was generating a temporary error. It now behaves as specified.
5135 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5136 (the order specifies the preference for clients). The order is now AES256,
5137 AES128, 3DES, ARCFOUR128.
5139 31. Small patch to Sieve code - explicitly set From: when generating an
5142 32. Exim crashed if a remote delivery caused a very long error message to be
5143 recorded - for instance if somebody sent an entire SpamAssassin report back
5144 as a large number of 550 error lines. This bug was coincidentally fixed by
5145 increasing the size of one of Exim's internal buffers (big_buffer) that
5146 happened as part of the Exiscan merge. However, to be on the safe side, I
5147 have made the code more robust (and fixed the comments that describe what
5150 33. Some experimental protocols are using DNS PTR records for new purposes. The
5151 keys for these records are domain names, not reversed IP addresses. The
5152 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5153 leaves it alone. Component reversal etc. now happens only for IP addresses.
5156 34. The host_aton() function is supposed to be passed a string that is known
5157 to be a valid IP address. However, in the case of IPv6 addresses, it was
5158 not checking this. This is a hostage to fortune. Exim now panics and dies
5159 if the condition is not met. A case was found where this could be provoked
5160 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5161 components; fortuitously, this particular loophole had already been fixed
5162 by change 4.50/55 or 4.44/33 above.
5164 If there are any other similar loopholes, the new check in host_aton()
5165 itself should stop them being exploited. The report I received stated that
5166 data on the command line could provoke the exploit when Exim was running as
5167 exim, but did not say which command line option was involved. All I could
5168 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5169 running as the user.
5172 35. There was a buffer overflow vulnerability in the SPA authentication code
5173 (which came originally from the Samba project). I have added a test to the
5174 spa_base64_to_bits() function which I hope fixes it.
5177 36. The daemon start-up calls getloadavg() while still root for those OS that
5178 need the first call to be done as root, but it missed one case: when
5179 deliver_queue_load_max is set with deliver_drop_privilege. This is
5180 necessary for the benefit of the queue runner, because there is no re-exec
5181 when deliver_drop_privilege is set.
5183 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5184 was in use, was not putting the data itself into the right store pool;
5185 consequently, it could be overwritten for a subsequent message in the same
5186 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5189 38. Sometimes the final signoff response after QUIT could fail to get
5190 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5191 < 0 before doing a fflush(). This bug looks as though it goes back to the
5192 introduction of TLS in release 3.20, but "sometimes" must have been rare
5193 because the tests only now provoked it.
5199 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5200 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5201 Now it returns an integer. A number of calls were still expecting a T/F
5202 return. Fortuitously, in all cases, the tests worked in OK situations,
5203 which is the norm. However, things would have gone wrong on any write
5204 failures on the smtp file descriptor. This function is used when sending
5205 messages over SMTP and also when doing verify callouts.
5207 2. When Exim is called to do synchronous delivery of a locally submitted
5208 message (the -odf or -odi options), it no longer closes stderr before doing
5211 3. Implemented the mua_wrapper option.
5213 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5215 5. Implemented the functions header_remove(), header_testname(),
5216 header_add_at_position(), and receive_remove_recipient(), and exported them
5219 6. If an ACL "warn" statement specified the addition of headers, Exim already
5220 inserted X-ACL-Warn: at the start if there was no header name. However, it
5221 was not making this test for the second and subsequent header lines if
5222 there were newlines in the string. This meant that an invalid header could
5223 be inserted if Exim was badly configured.
5225 7. Allow an ACL "warn" statement to add header lines at the start or after all
5226 the Received: headers, as well as at the end.
5228 8. Added the rcpt_4xx retry error code.
5230 9. Added postmaster_mailfrom=xxx to callout verification option.
5232 10. Added mailfrom=xxxx to the callout verification option, for verify=
5235 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5236 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5238 12. Inserted some casts to stop certain compilers warning when using pointer
5239 differences as field lengths or precisions in printf-type calls (mostly
5240 affecting debugging statements).
5242 13. Added optional readline() support for -be (dynamically loaded).
5244 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5245 same clock tick as a message's arrival, so that its received time was the
5246 same as the "first fail" time on the retry record, and that message
5247 remained on the queue past the ultimate address timeout, every queue runner
5248 would try a delivery (because it was past the ultimate address timeout) but
5249 after another failure, the ultimate address timeout, which should have then
5250 bounced the address, did not kick in. This was a "< instead of <=" error;
5251 in most cases the first failure would have been in the next clock tick
5252 after the received time, and all would be well.
5254 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5255 being recognized when the domain list was tested by the match_domain
5256 condition in an expansion string.
5258 16. Added the ${str2b64: operator.
5260 17. Exim was always calling setrlimit() to set a large limit for the number of
5261 processes, without checking whether the existing limit was already
5262 adequate. (It did check for the limit on file descriptors.) Furthermore,
5263 errors from getrlimit() and setrlimit() were being ignored. Now they are
5264 logged to the main and panic logs, but Exim does carry on, to try to do its
5265 job under whatever limits there are.
5267 18. Imported PCRE 5.0.
5269 19. Trivial typo in log message " temporarily refused connection" (the leading
5272 20. If the log selector return_path_on_delivery was set and an address was
5273 redirected to /dev/null, the delivery process crashed because it assumed
5274 that a return path would always be set for a "successful" delivery. In this
5275 case, the whole delivery is bypassed as an optimization, and therefore no
5278 21. Internal re-arrangement: the function for sending a challenge and reading
5279 a response while authentication was assuming a zero-terminated challenge
5280 string. It's now changed to take a pointer and a length, to allow for
5281 binary data in such strings.
5283 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5285 23. Exim was not respecting finduser_retries when seeking the login of the
5286 uid under which it was called; it was always trying 10 times. (The default
5287 setting of finduser_retries is zero.) Also, it was sleeping after the final
5288 failure, which is pointless.
5290 24. Implemented tls_on_connect_ports.
5292 25. Implemented acl_smtp_predata.
5294 26. If the domain in control=submission is set empty, Exim assumes that the
5295 authenticated id is a complete email address when it generates From: or
5296 Sender: header lines.
5298 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5299 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5300 chown and chgrp in /bin and hostname in /usr/bin.
5302 28. Exim was keeping the "process log" file open after each use, just as it
5303 does for the main log. This opens the possibility of it remaining open for
5304 long periods when the USR1 signal hits a daemon. Occasional processlog
5305 errors were reported, that could have been caused by this. Anyway, it seems
5306 much more sensible not to leave this file open at all, so that is what now
5309 29. The long-running daemon process does not normally write to the log once it
5310 has entered its main loop, and it closes the log before doing so. This is
5311 so that log files can straightforwardly be renamed and moved. However,
5312 there are a couple of unusual error situations where the daemon does write
5313 log entries, and I had neglected to close the log afterwards.
5315 30. The text of an SMTP error response that was received during a remote
5316 delivery was being truncated at 512 bytes. This is too short for some of
5317 the long messages that one sometimes sees. I've increased the limit to
5320 31. It is now possible to make retry rules that apply only when a message has a
5321 specific sender, in particular, an empty sender.
5323 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5324 it possible to be selective about when SMTP synchronization is enforced.
5326 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5328 32. Implemented hosts_connection_nolog.
5330 33. Added an ACL for QUIT.
5332 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5335 35. Added mailbox_size and mailbox_filecount to appendfile.
5337 36. Added control = no_multiline_responses to ACLs.
5339 37. There was a bug in the logic of the code that waits for the clock to tick
5340 in the case where the clock went backwards by a substantial amount such
5341 that the microsecond fraction of "now" was more than the microsecond
5342 fraction of "then" (but the whole seconds number was less).
5344 38. Added support for the libradius Radius client library this is found on
5345 FreeBSD (previously only the radiusclient library was supported).
5351 1. When certain lookups returned multiple values in the form name=value, the
5352 quoting of the values was not always being done properly. Specifically:
5353 (a) If the value started with a double quote, but contained no whitespace,
5355 (b) If the value contained whitespace other than a space character (i.e.
5356 tabs or newlines or carriage returns) it was not quoted.
5357 This fix has been applied to the mysql and pgsql lookups by writing a
5358 separate quoting function and calling it from the lookup code. The fix
5359 should probably also be applied to nisplus, ibase and oracle lookups, but
5360 since I cannot test any of those, I have not disturbed their existing code.
5362 2. A hit in the callout cache for a specific address caused a log line with no
5363 reason for rejecting RCPT. Now it says "Previous (cached) callout
5364 verification failure".
5366 3. There was an off-by-one bug in the queryprogram router. An over-long
5367 return line was truncated at 256 instead of 255 characters, thereby
5368 overflowing its buffer with the terminating zero. As well as fixing this, I
5369 have increased the buffer size to 1024 (and made a note to document this).
5371 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5372 when Exim is waiting for an SMTP response from a remote server, Exim
5373 restarts its select() call on the socket, thereby resetting its timeout.
5374 This is not a problem when such interrupts are rare. Somebody set up a cron
5375 job to run exiwhat every 2 minutes, which is less than the normal select()
5376 timeout (5 or 10 minutes). This meant that the select() timeout never
5377 kicked in because it was always reset. I have fixed this by comparing the
5378 time when an interrupt arrives with the time at the start of the first call
5379 to select(). If more time than the timeout has elapsed, the interrupt is
5380 treated as a timeout.
5382 5. Some internal re-factoring in preparation for the addition of Sieve
5383 extensions (by MH). In particular, the "personal" test is moved to a
5384 separate function, and given an option for scanning Cc: and Bcc: (which is
5385 not set for Exim filters).
5387 6. When Exim created an email address using the login of the caller as the
5388 local part (e.g. when creating a From: or Sender: header line), it was not
5389 quoting the local part when it contained special characters such as @.
5391 7. Installed new OpenBSD configuration files.
5393 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5394 try to make them clearer.
5396 9. Callout options, other than the timeout value, were being ignored when
5397 verifying sender addresses in header lines. For example, when using
5399 verify = header_sender/callout=no_cache
5401 the cache was (incorrectly) being used.
5403 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5404 only the Cygwin environment.
5406 11. When return_path_on_delivery was set as a log selector, if different remote
5407 addresses in the same message used different return paths and parallel
5408 remote delivery occurred, the wrong values would sometimes be logged.
5409 (Whenever a remote delivery process finished, the return path value from
5410 the most recently started remote delivery process was logged.)
5412 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5413 lines when AUTH and/or TLS are in use. This is the "received protocol"
5414 field. Exim used to use "asmtp" for authenticated SMTP, without any
5415 indication (in the protocol name) for TLS use. Now it follows the RFC and
5416 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5417 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5418 names appear in log lines as well as in Received: header lines.
5420 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5421 extensions, and comparison tests, and to fix some bugs.
5423 14. Changes to the "personal" filter test:
5425 (1) The test was buggy in that it was just doing the equivalent of
5426 "contains" tests on header lines. For example, if a user's address was
5427 anne@some.where, the "personal" test would incorrectly be true for
5429 To: susanne@some.where
5431 This test is now done by extracting each address from the header in turn,
5432 and checking the entire address. Other tests that are part of "personal"
5433 are now done using regular expressions (for example, to check local parts
5434 of addresses in From: header lines).
5436 (2) The list of non-personal local parts in From: addresses has been
5437 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5438 taken from the Sieve specification recommendations.
5440 (3) If the message contains any header line starting with "List-" it is
5441 treated as non-personal.
5443 (4) The test for "circular" in the Subject: header line has been removed
5444 because it now seems ill-conceived.
5446 15. Minor typos in src/EDITME comments corrected.
5448 16. Installed latest exipick from John Jetmore.
5450 17. If headers_add on a router specified a text string that was too long for
5451 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5452 of string_sprintf() is now avoided.
5454 18. $message_body_size was not set (it was always zero) when running the DATA
5455 ACL and the local_scan() function.
5457 19. For the "mail" command in an Exim filter, no default was being set for
5458 the once_repeat time, causing a random time value to be used if "once" was
5459 specified. (If the value happened to be <= 0, no repeat happened.) The
5460 default is now 0s, meaning "never repeat". The "vacation" command was OK
5461 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5462 (I found it when inspecting the code).
5464 20. There is now an overall timeout for performing a callout verification. It
5465 defaults to 4 times the callout timeout, which applies to individual SMTP
5466 commands during the callout. The overall timeout applies when there is more
5467 than one host that can be tried. The timeout is checked before trying the
5468 next host. This prevents very long delays if there are a large number of
5469 hosts and all are timing out (e.g. when the network connections are timing
5470 out). The value of the overall timeout can be changed by specifying an
5471 additional sub-option for "callout", called "maxwait". For example:
5473 verify = sender/callout=5s,maxwait=20s
5475 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5476 to the end before writing, but this should make it even safer).
5478 22. Exim was forgetting that it had advertised PIPELINING for the second and
5479 subsequent messages on an SMTP connection. It was also not resetting its
5480 memory on STARTTLS and an internal HELO.
5482 23. When Exim logs an SMTP synchronization error within a session, it now
5483 records whether PIPELINING has been advertised or not.
5485 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5486 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5487 rather than long int.
5489 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5491 26. Added the never_mail option to autoreply.
5497 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5498 crash if the getsockname() call failed; this can happen if a connection is
5499 closed very soon after it is established. The problem was simply in the
5500 order in which certain operations were done, causing Exim to try to write
5501 to the SMTP stream before it had set up the file descriptor. The bug has
5502 been fixed by making things happen in the correct order.
5508 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5509 before the connection was closed, thus losing the rejection response.
5511 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5512 some early Solaris releases, but causes trouble in current releases where
5513 socklen_t is defined.
5515 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5518 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5521 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5522 that releasing the top of it at the end releases what was used for sub-
5523 expansions (unless the block got too big). However, discard this block if
5524 the first thing is a variable or header, so that we can use its block when
5525 it is dynamic (useful for very large $message_headers, for example).
5527 6. Lookups now cache *every* query, not just the most recent. A new, separate
5528 store pool is used for this. It can be recovered when all lookup caches are
5529 flushed. Lookups now release memory at the end of their result strings.
5530 This has involved some general refactoring of the lookup sources.
5532 7. Some code has been added to the store_xxx() functions to reduce the amount
5533 of flapping under certain conditions.
5535 8. log_incoming_interface used to affect only the <= reception log lines. Now
5536 it causes the local interface and port to be added to several more SMTP log
5537 lines, for example "SMTP connection from", and rejection lines.
5539 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5541 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5543 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5544 could be overwritten at the end of the current message (or the start of a
5545 new message if it was set in a HELO ACL). The value is now preserved for
5546 the duration of the SMTP connection.
5548 12. If a transport had a headers_rewrite setting, and a matching header line
5549 contained an unqualified address, that address was qualified, even if it
5550 did not match any rewriting rules. The underlying bug was that the values
5551 of the flags that permit the existence of unqualified sender and recipient
5552 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5553 non-local messages, and by -bnq for local messages) were not being
5554 preserved with the message after it was received.
5556 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5557 "next input=" as part of the text comprising the host identity instead of
5558 the correct text. The code was using the same buffer for two different
5559 strings. However, depending on which order the printing function evaluated
5560 its arguments, the bug did not always show up. Under Linux, for example, my
5561 test suite worked just fine.
5563 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5564 doesn't work with some older versions of Perl. It has been changed to "my",
5565 which in any case is probably the better facility to use.
5567 15. A really picky compiler found some instances of statements for creating
5568 error messages that either had too many or two few arguments for the format
5571 16. The size of the buffer for calls to the DNS resolver has been increased
5572 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5573 for addresses that have a lot of PTR records. This alleviates a problem; it
5574 does not fully solve it.
5576 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5577 buffer now truncates the list and logs the incident, which is the same
5578 action as happens when Exim is looking up a host name and its aliases.
5579 Previously in this situation something unpredictable would happen;
5580 sometimes it was "internal error: store_reset failed".
5582 18. If a server dropped the connection unexpectedly when an Exim client was
5583 using GnuTLS and trying to read a response, the client delivery process
5584 crashed while trying to generate an error log message.
5586 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5587 string, for example:
5589 warn message = H1: something\nH2: something
5591 the text was added as a single header line from Exim's point of view
5592 though it ended up OK in the delivered message. However, searching for the
5593 second and subsequent header lines using $h_h2: did not work. This has been
5594 fixed. Similarly, if a system filter added multiple headers in this way,
5595 the routers could not see them.
5597 20. Expanded the error message when iplsearch is called with an invalid key to
5598 suggest using net-iplsearch in a host list.
5600 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5601 ACLs are no longer actually imposed (and a message to that effect is
5604 22. If a "gecos" field in a passwd entry contained escaped characters, in
5605 particular, if it contained a \" sequence, Exim got it wrong when building
5606 a From: or a Sender: header from that name. A second bug also caused
5607 incorrect handling when an unquoted " was present following a character
5608 that needed quoting.
5610 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5611 was not being matched caselessly.
5613 24. Arranged for all hyphens in the exim.8 source to be escaped with
5616 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5617 properly. Recipient callout cache records were still being keyed to include
5618 the sender, even when use_sender was set false. This led to far more
5619 callouts that were necessary. The sender is no longer included in the key
5620 when use_sender is false.
5622 26. Added "control = submission" modifier to ACLs.
5624 27. Added the ${base62d: operator to decode base 62 numbers.
5626 28. dnsdb lookups can now access SRV records.
5628 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5629 the configuration file.
5631 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5632 (-v) mode. This makes the output for a verbose queue run more intelligible.
5634 31. Added a use_postmaster feature to recipient callouts.
5636 32. Added the $body_zerocount variable, containing the number of binary zero
5637 bytes in the message body.
5639 33. The time of last modification of the "new" subdirectory is now used as the
5640 "mailbox time last read" when there is a quota error for a maildir
5643 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5645 35. Added +ignore_unknown as a special item in host lists.
5647 36. Code for decoding IPv6 addresses in host lists is now included, even if
5648 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5649 address was recognized as an IP address, but was then not correctly decoded
5650 into binary, causing unexpected and incorrect effects when compared with
5657 1. Very minor rewording of debugging text in manualroute to say "list of
5658 hosts" instead of "hostlist".
5660 2. If verify=header_syntax was set, and a header line with an unqualified
5661 address (no domain) and a large number of spaces between the end of the
5662 name and the colon was received, the reception process suffered a buffer
5663 overflow, and (when I tested it) crashed. This was caused by some obsolete
5664 code that should have been removed. The fix is to remove it!
5666 3. When running in the test harness, delay a bit after writing a bounce
5667 message to get a bit more predictability in the log output.
5669 4. Added a call to search_tidyup() just before forking a reception process. In
5670 theory, someone could use a lookup in the expansion of smtp_accept_max_
5671 per_host which, without the tidyup, could leave open a database connection.
5673 5. Added the variables $recipient_data and $sender_data which get set from a
5674 lookup success in an ACL "recipients" or "senders" condition, or a router
5675 "senders" option, similar to $domain_data and $local_part_data.
5677 6. Moved the writing of debug_print from before to after the "senders" test
5680 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5681 problems for message scanning, either using a data ACL, or using
5682 local_scan() because the Received: header was not generated till after they
5683 were called (in order to set the time as the time of reception completion).
5684 I have revised the way this works. The header is now generated after the
5685 body is received, but before the ACL or local_scan() are called. After they
5686 are run, the timestamp in the header is updated.
5692 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5693 before starting a queue runner without re-exec. This happened only when
5694 deliver_drop_privilege was set or when the Exim user was set to root. The
5695 effect of the bug was that timeouts during subsequent deliveries caused
5696 crashes instead of being properly handled. The handler is now left at its
5697 default (and expected) setting.
5699 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5700 message, again when deliver_drop_privilege is set or Exim is run as root.
5701 The bug described in (1) was not present in this case, but the tidying up
5702 of the other signals was missing. I have made the two cases consistent.
5704 3. The ignore_target_hosts setting on a manualroute router was being ignored
5705 for hosts that were looked up using the /MX notation.
5707 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5710 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5711 operated on the sender address. After changing the $sender_address to <>
5712 for the sender address verify, Exim was re-instated it as the original
5713 (before rewriting) address, but remembering that it had rewritten it, so it
5714 wasn't rewriting it again. This bug also had the effect of breaking the
5715 sender address verification caching when the sender address was rewritten.
5717 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5718 This has been changed so that if the ip literal address matches
5719 ignore_target_hosts, the router declines.
5721 7. Added expansion conditions match_domain, match_address, and match_local_
5722 part (NOT match_host).
5724 8. The placeholder for the Received: header didn't have a length field set.
5726 9. Added code to Exim itself and to exim_lock to test for a specific race
5727 condition that could lead to file corruption when using MBX delivery. The
5728 issue is with the lockfile that is created in /tmp. If this file is removed
5729 after a process has opened it but before that process has acquired a lock,
5730 there is the potential for a second process to recreate the file and also
5731 acquire a lock. This could lead to two Exim processes writing to the file
5732 at the same time. The added code performs the same test as UW imapd; it
5733 checks after acquiring the lock that its file descriptor still refers to
5734 the same named file.
5736 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5737 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5740 11. Added the smtp_active_hostname option. If used, this will typically be made
5741 to depend on the incoming interface address. Because $interface_address is
5742 not set up until the daemon has forked a reception process, error responses
5743 that can happen earlier (such as "too many connections") no longer contain
5746 12. If an expansion in a condition on a "warn" statement fails because a lookup
5747 defers, the "warn" statement is abandoned, and the next ACL statement is
5748 processed. Previously this caused the whole ACL to be aborted.
5750 13. Added the iplsearch lookup type.
5752 14. Added ident_timeout as a log selector.
5754 15. Added tls_certificate_verified as a log selector.
5756 16. Added a global option tls_require_ciphers (compare the smtp transport
5757 option of the same name). This controls incoming TLS connections.
5759 17. I finally figured out how to make tls_require_ciphers do a similar thing
5760 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5761 before starting the TLS session.
5763 18. Tabs are now shown as \t in -bP output.
5765 19. If the log selector return_path_on_delivery was set, Exim crashed when
5766 bouncing a message because it had too many Received: header lines.
5768 20. If two routers both had headers_remove settings, and the first one included
5769 a superfluous trailing colon, the final name in the first list and the
5770 first name in the second list were incorrectly joined into one item (with a
5771 colon in the middle).
5777 1. Added -C and -D options to the exinext utility, mainly to make it easier
5778 to include in the automated testing, but these could be helpful when
5779 multiple configurations are in use.
5781 2. The exinext utility was not formatting the output nicely when there was
5782 an alternate port involved in the retry record key, nor when there was a
5783 message id as well (for retries that were specific to a specific message
5784 and a specific host). It was also confused by IPv6 addresses, because of
5785 the additional colons they contain. I have fixed the IPv4 problem, and
5786 patched it up to do a reasonable job for IPv6.
5788 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5789 delivery, the log line now contains "pipelined" if PIPELINING was used.
5791 4. An SMTP transport process used to panic and die if the bind() call to set
5792 an explicit outgoing interface failed. This has been changed; it is now
5793 treated in the same way as a connect() failure.
5795 5. A reference to $sender_host_name in the part of a conditional expansion
5796 that was being skipped was still causing a DNS lookup. This no longer
5799 6. The def: expansion condition was not recognizing references to header lines
5800 that used bh_ and bheader_.
5802 7. Added the _cache feature to named lists.
5804 8. The code for checking quota_filecount in the appendfile transport was
5805 allowing one more file than it should have been.
5807 9. For compatibility with Sendmail, the command line option
5815 and sets the incoming protocol and host name (for trusted callers). The
5816 host name and its colon can be omitted when only the protocol is to be set.
5817 Note the Exim already has two private options, -pd and -ps, that refer to
5818 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5819 "s", but I don't think that's a major issue.
5821 10. A number of refactoring changes to the code, none of which should affect
5824 (a) The number of logging options was getting close to filling up the
5825 32-bit word that was used as a bit map. I have split them into two classes:
5826 those that are passed in the argument to log_write(), and those that are
5827 only ever tested independently outside of that function. These are now in
5828 separate 32-bit words, so there is plenty of room for expansion again.
5829 There is no change in the user interface or the logging behaviour.
5831 (b) When building, for example, log lines, the code previously used a
5832 macro that called string_cat() twice, in order to add two strings. This is
5833 not really sufficiently general. Furthermore, there was one instance where
5834 it was actually wrong because one of the argument was used twice, and in
5835 one call a function was used. (As it happened, calling the function twice
5836 did not affect the overall behaviour.) The macro has been replaced by a
5837 function that can join an arbitrary number of extra strings onto a growing
5840 (c) The code for expansion conditions now uses a table and a binary chop
5841 instead of a serial search (which was left over from when there were very
5842 few conditions). Also, it now recognizes conditions like "pam" even when
5843 the relevant support is not compiled in: a suitably worded error message is
5844 given if an attempt is made to use such a condition.
5846 11. Added ${time_interval:xxxxx}.
5848 12. A bug was causing one of the ddress fields not to be passed back correctly
5849 from remote delivery subprocesses. The field in question was not being
5850 subsequently used, so this caused to problems in practice.
5852 13. Added new log selectors queue_time and deliver_time.
5854 14. Might have fixed a bug in maildirsizefile handling that threw up
5855 "unexpected character" debug warnings, and recalculated the data
5856 unnecessarily. In any case, I expanded the warning message to give more
5859 15. Added the message "Restricted characters in address" to the statements in
5860 the default ACL that block characters like @ and % in local parts.
5862 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5863 Three changes have been made:
5865 (a) There was a serious bug; a negative response to MAIL caused the whole
5866 recipient domain to be cached as invalid, thereby blocking all messages
5867 to all local parts at the same domain, from all senders. This bug has
5868 been fixed. The domain is no longer cached after a negative response to
5869 MAIL if the sender used is not empty.
5871 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5874 (c) A new callout option, "use_sender" has been added for people who want
5875 the modified behaviour.
5881 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5884 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5885 indeed breaks things for older releases.
5887 3. Added additional logging to the case where there is a problem reading data
5888 from a filter that is running in a subprocess using a pipe, in order to
5889 try to track down a specific problem.
5891 4. Testing facility fudge: when running in the test harness and attempting
5892 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5893 getting "No route to host". Convert this to a timeout.
5895 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5898 6. Some OS don't have socklen_t but use size_t instead. This affects the
5899 fifth argument of getsockopt() amongst other things. This is now
5900 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5901 can be set for individual OS. I have set it for SunOS5, OSF1, and
5902 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5903 some earlier ones do not.
5905 7. Change 4.30/15 was not doing the test caselessly.
5907 8. The standard form for an IPv6 address literal was being rejected by address
5908 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5909 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5910 this, as well as the form without the "IPv6" on the front (but only when
5911 address literals are enabled, of course).
5913 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5915 10. Exim crashed if a message with an empty sender address specified by -f
5916 encountered a router with an errors_to setting. This could be provoked only
5917 by a command such as
5921 where an empty string was supplied; "<>" did not hit this bug.
5923 11. Installed PCRE release 4.5.
5925 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5926 remained set. It is now erased.
5928 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5929 times from message ids (which are base 36 rather than the normal 62).
5931 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5932 were being counted as actual protocol errors, and logged if the log
5933 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5934 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5935 and DATA following a set of rejected RCPTs do not count as protocol errors.
5936 In other words, Exim assumes they were pipelined, though this may not
5937 actually be the case. Of course, in all cases the client gets an
5938 appropriate error code.
5940 15. If a lookup fails in an ACL condition, a message about the failure may
5941 be available; it is used if testing the ACL cannot continue, because most
5942 such messages specify what the cause of the deferral is. However, some
5943 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5944 that caused an old message to be retained and used if a later statement
5945 caused a defer, replacing the real cause of the deferral.
5947 16. If an IP address had so many PTR records that the DNS lookup buffer
5948 was not large enough to hold them, Exim could crash while trying to process
5949 the truncated data. It now detects and logs this case.
5951 17. Further to 4.21/58, another change has been made: if (and only if) the
5952 first line of a message (the first header line) ends with CRLF, a bare LF
5953 in a subsequent header line has a space inserted after it, so as not to
5954 terminate the header.
5956 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5957 unnecessarily, used atoi() instead of strtol(), and didn't check the
5958 termination when getting file sizes from file names by regex.
5960 19. Completely re-implemented the support for maildirsize files, in the light
5961 of a number of problems with the previous contributed implementation
5962 (4.30/29). In particular:
5964 . If the quota is zero, the maildirsize file is maintained, but no quota is
5967 . If the maildir directory does not exist, it is created before any attempt
5968 to write a maildirsize file.
5970 . The quota value in the file is just a cache; if the quota is changed in
5971 the transport, the new value overrides.
5973 . A regular expression is available for excluding directories from the
5976 20. The autoreply transport checks the characters in options that define the
5977 message's headers; it allows continued headers, but it was checking with
5978 isspace() after an embedded newline instead of explicitly looking for a
5981 21. If all the "regular" hosts to which an address was routed had passed their
5982 expiry times, and had not reached their retry times, the address was
5983 bounced, even if fallback hosts were defined. Now Exim should go on to try
5986 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5987 equivalent code in the SMTP transport. Some hosts send humungous responses
5988 to HELO/EHLO, more than 1024 it seems.
5990 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5991 gives compiler warnings in some environments. I've now done it "properly",
5994 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5995 (because of problems with the built-in one) was declared to return uschar *
5996 instead of char *, causing compiler failure.
5998 25. Fixed a file descriptor leak when processing alias/forward files.
6000 26. Fixed a minor format string issue in dbfn.c.
6002 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6004 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6005 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6008 29. When a sender address is verified, it is cached, to save repeating the test
6009 when there is more than one recipient in a message. However, when the
6010 verification involves a callout, it is possible for different callout
6011 options to be set for different recipients. It is too complicated to keep
6012 track of this in the cache, so now Exim always runs a verification when a
6013 callout is required, relying on the callout cache for the optimization.
6014 The overhead is duplication of the address routing, but this should not be
6017 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6018 to be verified with callout=postmaster, and the main callout worked but the
6019 postmaster check failed, the verification correctly failed. However, if a
6020 subsequent RCPT command asked for sender verification *without* the
6021 postmaster check, incorrect caching caused this verification also to fail,
6024 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6025 it was not caching the DNS options (qualify_single, search_parents) that
6026 were used when the lookup failed. A subsequent lookup with different
6027 options therefore always gave the same answer, though there were cases
6028 where it should not have. (Example: a "domains = !$mx_any" option on a
6029 dnslookup router: the "domains" option is always processed without any
6030 widening, but the router might have qualify_single set.) Now Exim uses the
6031 cached value only when the same options are set.
6033 32. Added John Jetmore's "exipick" utility to the distribution.
6035 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6036 than a timeout (e.g. a certificate is required, and is not provided), an
6037 Exim server now closes the connection immediately. Previously it waited for
6038 the client to close - but if the client is SSL, it seems that they each
6039 wait for each other, leading to a delay before one of them times out.
6041 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6042 maintained 0.8.x compatibility because I don't think many are using it, and
6043 it is clearly obsolete.
6045 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6048 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6049 client certificate was expired. A simple patch fixes this, though I don't
6050 understand the full logic of why the verify callback is called multiple
6053 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6054 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6055 which causes problems with some clients (such as the Certicom SSL Plus
6056 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6057 disables the coutermeasure allowing Eudora to connect."
6059 38. Exim was not checking that a write() to a log file succeeded. This could
6060 lead to Bad Things if a log got too big, in particular if it hit a file
6061 size limit. Exim now panics and dies if it cannot write to a log file, just
6062 as it does if it cannot open a log file.
6064 39. Modified OS/Makefile-Linux so that it now contains
6066 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6068 The two -D definitions ensure that Exim is compiled with large file
6069 support, which makes it possible to handle log files that are bigger than
6072 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6073 instance) a domain was checked against a named list that involved a lookup,
6074 causing $domain_data to be set, then another domain was checked against the
6075 same list, then the first domain was re-checked, the value of $domain_data
6076 after the final check could be wrong. In particular, if the second check
6077 failed, it could be set empty. This bug probably also applied to
6080 41. The strip_trailing_dot option was not being applied to the address given
6081 with the -f command-line option.
6083 42. The code for reading a message's header from the spool was incrementing
6084 $received_count, but never initializing it. This meant that the value was
6085 incorrect (doubled) while delivering a message in the same process in which
6086 it was received. In the most common configuration of Exim, this never
6087 happens - a fresh exec is done - but it can happen when
6088 deliver_drop_privilege is set.
6090 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6091 it now includes up to 150 characters of the unexpected data in the log
6094 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6095 and building data strings. The size of both of these buffers was 10 000
6096 bytes - far larger than anybody would *ever* want, thought I. Needless to
6097 say, somebody hit the limit. I have increased the maximum line length to
6098 20 000 and the maximum data length of concatenated lines to 100 000. I have
6099 also fixed two bugs, because there was no checking on these buffers. Tsk,
6100 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6101 buffer is too small.
6103 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6104 lsearch lookups. Now it does.
6106 46. When parsing a route_list item in a manualroute router, a fixed-length
6107 buffer was used for the list of hosts. I made this 1024 bytes long,
6108 thinking that nobody would ever have a list of hosts that long. Wrong.
6109 Somebody had a whole pile of complicated expansion conditions, and the
6110 string was silently truncated, leading to an expansion error. It turns out
6111 that it is easier to change to an unlimited length (owing to other changes
6112 that have happened since this code was originally written) than to build
6113 structure for giving a limitation error. The length of the item that
6114 expands into the list of hosts is now unlimited.
6116 47. The lsearch lookup could not handle data where the length of text line was
6117 more than 4095 characters. Such lines were truncated, leading to shortened
6118 data being returned. It should now handle lines of any length.
6120 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6121 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6124 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6125 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6126 no longer happens in comment lines. A list of replacements is now placed
6127 at the head of all of the source files, except those whose only change is
6128 to replace PERL_COMMAND in the very first #! line.
6130 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6131 messages on the queue, with a bottom-up merge sort, using code contributed
6132 by Michael Haardt. This should make operations like -bp somewhat faster on
6133 large queues. It won't affect queue runners, except when queue_run_in_order
6136 51. Installed eximstats 1.31 in the distribution.
6138 52. Added support for SRV lookups to the dnslookup router.
6140 53. If an ACL referred to $message_body or $message_body_end, the value was not
6141 reset for any messages that followed in the same SMTP session.
6143 54. The store-handling optimization for building very long strings was not
6144 differentiating between the different store pools. I don't think this
6145 actually made any difference in practice, but I've tidied it.
6147 55. While running the routers to verify a sender address, $sender_address
6148 was still set to the sender address. This is wrong, because when routing to
6149 send a bounce to the sender, it would be empty. Therefore, I have changed
6150 it so that, while verifying a sender address, $sender_address is set to <>.
6151 (There is no change to what happens when verifying a recipient address.)
6153 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6154 target A or AAAA records (if not already returned) without resetting the
6155 qualify_single or search_parents options of the DNS resolver. These are
6156 inappropriate in this case because the targets of MX and SRV records must
6157 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6158 target that, when qualified, matched something in the local domain. These
6159 two options are now turned off when doing these lookups.
6161 57. It seems that at least some releases of Reiserfs (which does not have the
6162 concept of a fixed number of inodes) returns zero and not -1 for the
6163 number of available inodes. This interacted badly with check_spool_inodes,
6164 which assumed that -1 was the "no such thing" setting. What I have done is
6165 to check that the total number of inodes is greater than zero before doing
6166 the test of how many are available.
6168 58. When a "warn" ACL statement has a log_message modifier, the message is
6169 remembered, and not repeated. This is to avoid a lot of repetition when a
6170 message has many recipients that cause the same warning to be written.
6171 However, Exim was preserving the list of already written lines for an
6172 entire SMTP session, which doesn't seem right. The memory is now reset if a
6173 new message is started.
6175 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6176 debugging output unless log_rewrite was also set.
6178 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6179 of (int)(handle) when we know that handle contains (void *)(-1).
6181 61. The Exim daemon panic-logs an error return when it closes the incoming
6182 connection. However "connection reset by peer" seems to be common, and
6183 isn't really an error worthy of noting specially, so that particular error
6186 62. When Exim is trying to find all the local interfaces, it used to panic and
6187 die if the ioctl to get the interface flags failed. However, it seems that
6188 on at least one OS (Solaris 9) it is possible to have an interface that is
6189 included in the list of interfaces, but for which you get a failure error
6190 for this call. This happens when the interface is not "plumbed" into a
6191 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6192 failure of the "get flags" call assumes that the interface is down.
6194 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6195 makes life easier for people who are doing arithmetic on fields extracted
6196 from dates, where you often get leading zeros that should not be
6197 interpreted as octal.
6199 64. Added qualify_domain to the redirect router, to override the global
6202 65. If a pathologically long header line contained very many addresses (the
6203 report of this problem mentioned 10 000) and each of them was rewritten,
6204 Exim could use up a very large amount of memory. (It kept on making new
6205 copies of the header line as it rewrote, and never released the old ones.)
6206 At the expense of a bit more processing, the header rewriting function has
6207 been changed so that it no longer eats memory in this way.
6209 66. The generation of the Received: header has been moved from the time that a
6210 message starts to be received, to the time that it finishes. The timestamp
6211 in the Received: header should now be very close to that of the <= log
6212 line. There are two side-effects of this change:
6214 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6215 logged header lines no longer include the local Received: line, because
6216 it has not yet been created. The same applies to a copy of the message
6217 that is returned to a non-SMTP sender when a message is rejected.
6219 (b) When a filter file is tested using -bf, no additional Received: header
6220 is added to the test message. After some thought, I decided that this
6223 This change does not affect the value of $received_for. It is still set
6224 after address rewriting, but before local_scan() is called.
6226 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6228 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6229 gave an unhelpful panic error message, and a defer error. I have managed to
6230 change this behaviour so that it now rejects any supplied certificate,
6231 which seems right, as the list of acceptable certificates is empty.
6233 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6234 gave an unhelpful defer error. I have not managed to make this reject any
6235 supplied certificates, but the error message it gives is "no certificate
6236 supplied", which is not helpful.
6238 70. exigrep's output now also includes lines that are not associated with any
6239 message, but which match the given pattern. Implemented by a patch from
6240 Martin Sluka, which also tidied up the Perl a bit.
6242 71. Recipient callout verification, like sender verification, was using <> in
6243 the MAIL FROM command. This isn't really the right thing, since the actual
6244 sender may affect whether the remote host accepts the recipient or not. I
6245 have changed it to use the actual sender in the callout; this means that
6246 the cache record is now keyed on a recipient/sender pair, not just the
6247 recipient address. There doesn't seem to be a real danger of callout loops,
6248 since a callout by the remote host to check the sender would use <>.
6249 [SEE ABOVE: changed after hitting problems.]
6251 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6252 temporary errors. However, in the case of such a code being given after
6253 the end of a data transmission (i.e. after ".") Exim was failing to write
6254 a retry record for the message. (Yes, there was some broken host that was
6255 actually sending 8xx at this point.)
6257 73. An unknown lookup type in a host list could cause Exim to panic-die when
6258 the list was checked. (An example that provoked this was putting <; in the
6259 middle of a list instead of at the start.) If this happened during a DATA
6260 ACL check, a -D file could be left lying around. This kind of configuration
6261 error no longer causes Exim to die; instead it causes a defer error. The
6262 incident is still logged to the main and panic logs.
6264 74. Buglet left over from Exim 3 conversion. The message "too many messages
6265 in one connection" was written to the rejectlog but not the mainlog, except
6266 when address rewriting (yes!) was being logged.
6268 75. Added write_rejectlog option.
6270 76. When a system filter was run not as root (that is, when system_filter_user
6271 was set), the values of the $n variables were not being returned to the
6272 main process; thus, they were not subsequently available in the $sn
6275 77. Added +return_path_on_delivery log selector.
6277 78. A connection timeout was being treated differently from recipients deferred
6278 when testing hosts_max_try with a message that was older than the host's
6279 retry timeout. (The host should not be counted, thus allowing all hosts to
6280 be tried at least once before bouncing.) This may have been the cause of an
6281 occasionally reported bug whereby a message would remain on the queue
6282 longer than the retry timeout, but would be bounced if a delivery was
6283 forced. I say "may" because I never totally pinned down the problem;
6284 setting up timeout/retry tests is difficult. See also the next item.
6286 79. The ultimate address timeout was not being applied to errors that involved
6287 a combination of host plus message (for example, a timeout on a MAIL
6288 command). When an address resolved to a number of possible hosts, and they
6289 were not all tried for each delivery (e.g. because of hosts_max_try), a
6290 message could remain on the queue longer than the retry timeout.
6292 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6295 81. Fixed an obscure SMTP outgoing bug which required at least the following
6296 conditions: (a) there was another message waiting for the same server;
6297 (b) the server returned 5xx to all RCPT commands in the first message so
6298 that the message was not completed; (c) the server dropped the connection
6299 or gave a negative response to the RSET that Exim sends to abort the
6300 transaction. The observed case was a dropped connection after DATA that had
6301 been sent in pipelining mode. That is, the server had advertised PIPELINING
6302 but was not implementing it correctly. The effect of the bug was incorrect
6303 behaviour, such as trying another host, and this could lead to a crash.
6309 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6310 and daemon.c were passed as pointers to ints; they should have been
6311 pointers to socklen_t variables (which are typically unsigned ints).
6313 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6316 3. Fixed a really odd bug that affected only the testing scheme; patching a
6317 certain fixed string in the binary changed the value of another string that
6318 happened to be identical to the end of the original first string.
6320 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6321 name", it returns that address as the IP address. On some operating
6322 systems (e.g. Solaris), it also passes back the IP address string as the
6323 "host name". However, on others (e.g. Linux), it passes back an empty
6324 string. Exim wasn't checking for this, and was changing the host name to an
6325 empty string, assuming it had been canonicalized.
6327 5. Although rare, it is permitted to have more than one PTR record for a given
6328 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6329 all the names associated with an address, because they do in Solaris.
6330 However, it seems that they do not in Linux for data that comes from the
6331 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6332 I found this out when I moved to a new Linux workstation and tried to run
6333 the Exim test suite.
6335 To get round this problem I have changed the code so that it now does its
6336 own call to the DNS to look up PTR records when searching for a host name.
6337 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6338 addresses that are only in /etc/hosts are still found.
6340 This behaviour is, however, controlled by an option called host_lookup_
6341 order, which defaults to "bydns:byaddr". If people want to use the other
6342 order, or indeed, just use one or the other means of lookup, they can
6343 specify it in this variable.
6345 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6346 some operating systems, this comes back from gethostbyaddr() as an empty
6347 string, and this is what Exim used to test for. However, it seems that in
6348 other systems, "." is yielded. Exim now tests for this case too.
6350 7. The values of check_spool_space and check_log_space are now held internally
6351 as a number of kilobytes instead of an absolute number of bytes. If a
6352 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6353 kilobyte. This means that much larger values can be stored.
6355 8. Exim monitor: an attempt to get the action menu when not actually pointing
6356 at a message produces an empty menu entitled "No message selected". This
6357 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6358 no entries in it ("Shell widget menu has zero width and/or height"). So I
6359 have added a single, blank menu entry in this case.
6361 9. Added ${quote_local_part.
6363 10. MIME decoding is now applied to the contents of Subject: header lines when
6366 11. Now that a reference to $sender_host_address automatically causes a reverse
6367 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6368 host lookup before query-style lookups in lists that might use this
6369 variable. This has therefore been abolished, and the "net-" prefix is no
6370 longer necessary for query-style lookups.
6372 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6373 have been a typo for LFLAGS, so it has been changed.
6375 13. The install script calls Exim with "-C /dev/null" in order to find the
6376 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6377 to be output. However, since Exim outputs its version number before the
6378 error, it didn't break the script. It just looked ugly. I fixed this by
6379 always allowing "-C /dev/null" if the caller is root.
6381 14. Ignore overlarge ACL variable number when reading spool file - insurance
6382 against a later release with more variables having written the file.
6384 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6385 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6386 this, as well as the form without the "IPv6" on the front.
6388 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6389 OS/Makefile-Darwin file.
6391 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6392 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6394 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6395 variable. However, some OS use ints for inodes. I've added cast to long int
6396 to get rid of the compiler warning.
6398 19. I had forgotten to lock out "/../" in configuration file names when
6399 ALT_CONFIG_PREFIX was set.
6401 20. Routers used for verification do not need to specify transports. However,
6402 if such a router generated a host list, and callout was configured, Exim
6403 crashed, because it could not find a port number from the (non-existent)
6404 transport. It now assumes port 25 in this circumstance.
6406 21. Added the -t option to exigrep.
6408 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6409 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6410 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6411 them is set, LOOKUP_LSEARCH is forced.
6413 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6415 24. Added sender and host information to the "rejected by local_scan()" log
6416 line; previously there was no indication of these.
6418 25. Added .include_if_exists.
6420 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6421 Linux. It turns out that not all file systems support this. Apparently some
6422 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6423 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6424 not supported on the file descriptor, is now ignored when Exim is trying to
6425 sync a directory. This applies only to Linux.
6427 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6429 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6430 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6433 29. Added support for maildirsize files from supplied patch (modified a bit).
6435 30. The use of :fail: followed by an empty string could lead Exim to respond to
6436 sender verification failures with (e.g.):
6438 550 Verification failed for <xxx>
6439 550 Sender verify failed
6441 where the first response line was missing the '-' that indicates it is not
6442 the final line of the response.
6444 31. The loop for finding the name of the user that called Exim had a hardwired
6445 limit of 10; it now uses the value of finduser_retries, which is used for
6446 all other user lookups.
6448 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6451 33. Exim was neglecting to zero errno before one call of strtol() when
6452 expanding a string and expecting an integer value. On some systems this
6453 resulted in spurious "integer overflow" errors. Also, it was casting the
6454 result into an int without checking.
6456 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6457 did not work. The code looks as if it has *never* worked, though it appears
6458 to have been documented since at least release 1.62. I have made it work.
6460 35. The "timeout_DNS" error in retry rules, also documented since at least
6461 1.62, also never worked. As it isn't clear exactly what this means, and
6462 clearly it isn't a major issue, I have abolished the feature by treating it
6463 as "timeout", and writing a warning to the main and panic logs.
6465 36. The display of retry rules for -brt wasn't always showing the error code
6468 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6469 timeout_connect_A, timeout_connect_MX.
6471 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6472 to the empty sender.
6474 39. The daemon was not analysing the content of -oX till after it had closed
6475 stderr and disconnected from the controlling terminal. This meant that any
6476 syntax errors were only noted on the panic log, and the return code from
6477 the command was 0. By re-arranging the code a little, I've made the
6478 decoding happen first, so such errors now appear on stderr, and the return
6479 code is 1. However, the actual setting up of the sockets still happens in
6480 the disconnected process, so errors there are still only recorded on the
6483 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6484 connections (as happens on some IP stacks) was logged at start up time as
6485 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6486 it from "IPv6 and IPv4", which means that two separate sockets are being
6489 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6490 says whether AF_INET or AF_INET6 was passed as an argument.
6492 42. Exiwhat output was messed up when time zones were included in log
6495 43. Exiwhat now gives more information about the daemon's listening ports,
6496 and whether -tls-on-connect was used.
6498 44. The "port" option of the smtp transport is now expanded.
6500 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6501 silently ignored. Now an error message is written to the main and panic
6504 46. There's a new ACL modifier called "logwrite" which writes to a log file
6505 as soon as it is encountered.
6507 47. Added $local_user_uid and $local_user_gid at routing time.
6509 48. Exim crashed when trying to verify a sender address that was being
6512 49. Exim was recognizing only a space character after ".include". It now also
6513 recognizes a tab character.
6515 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6516 extracting the relevant information from the specification. The man page no
6517 longer contains scrambled data for the -d option, and I've added a section
6518 at the front about calling Exim under different names.
6520 51. Added "extra_headers" argument to the "mail" command in filter files.
6522 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6525 53. Installed eximstats 1.29.
6527 54. Added transport_filter_timeout as a generic transport option.
6529 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6530 Cc: header lines. This was required by RFC 822, but it not required by RFC
6533 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6534 incoming messages that did not have them. Now it does so only if the
6535 message originates locally, that is, if there is no associated remote host
6536 address. When Resent- header lines are present, this applies to the Resent-
6537 lines rather than the non-Resent- lines.
6539 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6540 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6542 58. Messages for configuration errors now include the name of the main
6543 configuration file - useful now that there may be more than one file in a
6544 list (.included file names were always shown).
6546 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6547 for those rare installations that do not start the daemon as root or run it
6548 setuid root. I've cut out the call to initgroups() if the daemon is not
6551 60. The Exim user and group can now be bound into the binary as text strings
6552 that are looked up at the start of Exim's processing.
6554 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6556 62. Added $mailstore_basename variable.
6558 63. Installed patch to sieve.c from Michael Haardt.
6560 64. When Exim failed to open the panic log after failing to open the main log,
6561 the original message it was trying to log was written to stderr and debug
6562 output, but if they were not available (the usual case in production), it
6563 was lost. Now it is written to syslog before the two lines that record the
6564 failures to open the logs.
6566 65. Users' Exim filters run in subprocesses under the user's uid. It is
6567 possible for a "deliver" command or an alias in a "personal" command to
6568 provoke an address rewrite. If logging of address rewriting is configured,
6569 this fails because the process is not running as root or exim. There may be
6570 a better way of dealing with this, but for the moment (because 4.30 needs
6571 to be released), I have disabled address rewrite logging when running a
6572 filter in a non-root, non-exim process.
6578 1. The buildconfig auxiliary program wasn't quoting the value set for
6579 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6580 not defined. This bug was masked in 4.22 by the effect that was fixed in
6583 2. Some messages that were rejected after a message id was allocated were
6584 shown as "incomplete" by exigrep. It no longer does this for messages that
6585 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6587 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6588 have allow_domain_literals set, the ID did not get logged in the <= line.
6589 Domain literals are now always recognized in Message-ID: header lines.
6591 4. The first argument for a ${extract expansion item is the key name or field
6592 number. Leading and trailing spaces in this item were not being ignored,
6593 causing some misleading effects.
6595 5. When deliver_drop_privilege was set, single queue runner processes started
6596 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6597 same command in the process it spins off) were not dropping privilege.
6599 6. When the daemon running as "exim" started a queue runner, it always
6600 re-executed Exim in the spun-off process. This is a waste of effort when
6601 deliver_drop_privilege is set. The new process now just calls the
6602 queue-runner function directly.
6608 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6611 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6612 ignored. Though the use of -oP was forcing the writing of a pid file, it
6613 was always written to the default place.
6615 3. If the message "no IP address found for host xxxx" is generated during
6616 incoming verification, it is now followed by identification of the incoming
6617 connection (so you can more easily find what provoked it).
6619 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6621 5. Added some features to "harden" Exim a bit more against certain attacks:
6623 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6624 be put in Local/Makefile. This is like the never_users runtime option,
6625 but it cannot be overridden. The default setting is "root".
6627 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6628 prefix string with which any file named in a -C command line option
6631 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6632 is retained for -C and -D only if the caller of Exim is root. Without
6633 it, the exim user may also use -C and -D and retain privilege.
6635 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6636 command line option is disabled.
6638 6. Macro names set by the -D option must start with an upper case letter, just
6639 like macro names defined in the configuration file.
6641 7. Added "dereference=" facility to LDAP.
6643 8. Two instances of the typo "uknown" in the source files are fixed.
6645 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6646 the Configure-Makefile script screwed up while processing it.
6648 10. Incorporated PCRE 4.4.
6650 11. The SMTP synchronization check was not operating right at the start of an
6651 SMTP session. For example, it could not catch a HELO sent before the client
6652 waited for the greeting. There is now a check for outstanding input at the
6653 point when the greeting is written. Because of the duplex, asynchronous
6654 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6655 way, but not yet received, when the check is performed.
6657 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6658 on TCP/IP sockets, because this apparently causes some broken clients to
6661 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6662 unchanged) from the Cygwin maintainer.
6664 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6665 was supported instead of testing for mbx. Effectively a typo.
6667 15. The spa authenticator server code was not checking that the input it
6668 received was valid base64.
6670 16. The debug output line for the "set" modifier in ACLs was not showing the
6671 name of the variable that was being set.
6673 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6675 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6676 lookup on its own. Something else was needed to trigger the lookup. For
6677 example, a match in host_lookup or the need for a host name in a host list.
6678 Now, if $sender_host_name is referenced and the host name has not yet been
6679 looked up, a lookup is performed. If the lookup fails, the variable remains
6680 empty, and $host_lookup_failed is set to "1".
6682 19. Added "eqi" as a case-independent comparison operator.
6684 20. The saslauthd authentication condition could segfault if neither service
6685 nor realm was specified.
6687 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6688 error message that was logged was misleading, and incoming SMTP
6689 connections were dropped. The message is now more accurate, and temporary
6690 errors are given to SMTP connections.
6692 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6693 (except RSET) with a 421 error, until QUIT is received. However, it was
6694 failing to send a response to QUIT.
6696 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6697 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6698 ACL is now run after the helo_try_verify_hosts code.
6700 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6701 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6702 case-independent, so other case variants are also recognized). Apparently
6703 some systems use these upper case variants.
6705 25. If more than two messages were waiting for the same host, and a transport
6706 filter was specified for the transport, Exim sent two messages over the
6707 same TCP/IP connection, and then failed with "socket operation on non-
6708 socket" when it tried to send the third.
6710 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6712 27. The extern definition of crypt16() in expand.c was not being excluded when
6713 the OS had its own crypt16() function.
6715 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6716 as a preferred synonym for return_size_limit, both as an option and as an
6719 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6721 30. Changed the default configuration ACL to relax the local part checking rule
6722 for addresses that are not in any local domains. For these addresses,
6723 slashes and pipe symbols are allowed within local parts, but the sequence
6724 /../ is explicitly forbidden.
6726 31. SPA server authentication was not clearing the challenge buffer before
6729 32. log_message in a "warn" ACL statement was writing to the reject log as
6730 well as to the main log, which contradicts the documentation and doesn't
6731 seem right (because no rejection is happening). So I have stopped it.
6733 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6734 However, I am unable to do any testing of this.
6736 34. Fixed an infelicity in the appendfile transport. When checking directories
6737 for a mailbox, to see if any needed to be created, it was accidentally
6738 using path names with one or more superfluous leading slashes; tracing
6739 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6741 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6742 contents are added to the log line that is written for every discarded
6743 recipient. (Previously a log_message setting was ignored.)
6745 36. The ${quote: operator now quotes the string if it is empty.
6747 37. The install script runs exim in order to find its version number. If for
6748 some reason other than non-existence or emptiness, which it checks, it
6749 could not run './exim', it was installing it with an empty version number,
6750 i.e. as "exim-". This error state is now caught, and the installation is
6753 38. An argument was missing from the function that creates an error message
6754 when Exim fails to connect to the socket for saslauthd authentication.
6755 This could cause Exim to crash, or give a corrupted message.
6757 39. Added isip, isip4, and isip6 to ${if conditions.
6759 40. The ACL variables $acl_xx are now saved with the message, and can be
6760 accessed later in routers, transports, and filters.
6762 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6763 strings in the file are not string-expanded.
6765 42. If a MAIL command specified a SIZE value that was too large to fit into an
6766 int variable, the check against message_size_limit failed. Such values are
6767 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6768 day this will have to be increased, but I don't think I want to be around
6769 when emails are that large.
6776 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6777 iconv() is not standard in FreeBSD.
6779 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6780 IPv6 enabled. The observed symptom was a segmentation fault on return from
6781 the function os_common_find_running_interfaces() in src/os.c.
6783 3. In the check_special_case() function in daemon.c I had used "errno" as an
6784 argument name, which causes warnings on some systems. This was basically a
6785 typo, since it was named "eno" in the comments!
6787 4. The code that waits for the clock to tick (at a resolution of some fraction
6788 of a second) so as to ensure message-id uniqueness was always waiting for
6789 at least one whole tick, when it could have waited for less. [This is
6790 almost certainly not relevant at current processor speeds, where it is
6791 unlikely to ever wait at all. But we try to future-proof.]
6793 5. The function that sleeps for a time interval that includes fractions of a
6794 second contained a race. It did not block SIGALRM between setting the
6795 timer, and suspending (a couple of lines later). If the interval was short
6796 and the sigsuspend() was delayed until after it had expired, the suspension
6797 never ended. On busy systems this could lead to processes getting stuck for
6800 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6801 process, before it forks any delivery processes. The open lookup caching
6802 mechanism meant that the open file or database connection was passed into
6803 the delivery process. The problem was that delivery processes always tidy
6804 up cached lookup data. This could cause a problem for the next delivery
6805 process started by the queue runner, because the external queue runner
6806 process does not know about the closure. So the next delivery process
6807 still has data in the lookup cache. In the case of a file lookup, there was
6808 no problem because closing a file descriptor in a subprocess doesn't affect
6809 the parent. However, if the lookup was caching a connection to a database,
6810 the connection was closed, and the second delivery process was likely to
6811 see errors such as "PGSQL: query failed: server closed the connection
6812 unexpectedly". The problem has been fixed by closing all cached lookups
6813 in a queue runner before running a delivery process.
6815 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6816 seem to have the "const" qualifier which it has on other OS. I've
6819 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6820 *of the same type* (client or server) with the same public name that an
6821 error should be diagnosed.
6823 9. When Exim looked up a host name for an IP address, but failed to find the
6824 original IP address when looking up the host name (a safety check), it
6825 output the message "<ip address> does not match any IP for NULL", which was
6826 confusing, to say the least. The bug was that the host name should have
6827 appeared instead of "NULL".
6829 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6830 user that is built into the binary, and the -C or -D options is used, root
6831 privilege is dropped before the configuration file is read. In addition,
6832 logging is switched to stderr instead of the normal log files. If the
6833 configuration then re-defines the Exim user, the unprivileged environment
6834 is probably not what is expected, so Exim logs a panic warning message (but
6837 However, if deliver_drop_privilege is set, the unprivileged state may well
6838 be exactly what is intended, so the warning has been cut out in that case,
6839 and Exim is allowed to try to write to its normal log files.
6845 1. smtp_return_error_details was not giving details for temporary sender
6846 or receiver verification errors.
6848 2. Diagnose a configuration error if two authenticators have the same public
6851 3. Exim used not to create the message log file for a message until the first
6852 delivery attempt. This could be confusing when incoming messages were held
6853 for policy or load reasons. The message log file is now created at the time
6854 the message is received, and an initial "Received" line is written to it.
6856 4. The automatically generated man page for command line options had a minor
6857 bug that caused no ill effects; however, a more serious problem was that
6858 the procedure for building the man page automatically didn't always
6859 operate. Consequently, release 4.20 contains an out-of-date version. This
6860 shouldn't happen again.
6862 5. When building Exim with embedded Perl support, the script that builds the
6863 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6864 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6866 6. The freeze_tell option was not being used for messages that were frozen on
6867 arrival, either by an ACL or by local_scan().
6869 7. Added the smtp_incomplete_transaction log selector.
6871 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6872 was accepting AUTH without a new EHLO.
6874 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6875 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6878 10. Logging of TCP/IP connections (when configured) now happens in the main
6879 daemon process instead of the child process, so that the TCP/IP connection
6880 count is more accurate (but it can never be perfect).
6882 11. The use of "drop" in a nested ACL was not being handled correctly in the
6883 outer ACL. Now, if condition failure induced by the nested "drop" causes
6884 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6885 or "require"), the connection is dropped.
6887 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6888 that yield "discard" can now be used with an "accept" or a "discard" verb,
6889 but an error is generated for any others (because I can't see a useful way
6890 to define what should happen).
6892 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6893 are now processed in the same way as lines in the Exim configuration file.
6894 In particular, continuation lines are supported.
6896 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6898 15. Added -ti meaning -t -i.
6900 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6901 domains, and warn by logging if others are found.
6903 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6904 returned from GIFCONF when Exim is trying to find the list of interfaces on
6905 a host. The code in os.c has been modified to copy each ifreq to an aligned
6906 structure in all cases.
6908 Also, in some cases, the returned ifreq's were being copied to a 'struct
6909 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6910 means the last couple of bytes of an IPv6 address could be chopped if the
6911 ifreq contained only a normal sockaddr (14 bytes storage).
6913 18. Named domain lists were not supported in the hosts_treat_as_local option.
6914 An entry such as +xxxx was not recognized, and was treated as a literal
6917 19. Ensure that header lines added by a DATA ACL are included in the reject log
6918 if the ACL subsequently rejects the message.
6920 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6921 MD5 (which is deprecated).
6923 21. When testing a filter file using -bf, Exim was writing a message when it
6924 took the sender from a "From " line in the message, but it was not doing so
6925 when it took $return_path from a Return-Path: header line. It now does.
6927 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6928 with a valid header line field name (a series of printing characters
6929 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6931 23. Changed "disc" in the source to "disk" to conform to the documentation and
6932 the book and for uniformity.
6934 24. Ignore Sendmail's -Ooption=value command line item.
6936 25. When execve() failed while trying to run a command in a pipe transport,
6937 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6938 could be confused with a return value of 69 from the command itself. This
6939 has been changed to 127, the value the shell returns if it is asked to run
6940 a non-existent command. The wording for the related log line suggests a
6941 non-existent command as the problem.
6943 26. If received_header_text expands to an empty string, do not add a Received:
6944 header line to the message. (Well, it adds a token one on the spool, but
6945 marks it "old" so that it doesn't get used or transmitted.)
6947 27. Installed eximstats 1.28 (addition of -nt option).
6949 28. There was no check for failure on the call to getsockname() in the daemon
6950 code. This can fail if there is a shortage of resources on the system, with
6951 ENOMEM, for example. A temporary error is now given on failure.
6953 29. Contrary to the C standard, it seems that in some environments, the
6954 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6955 program. Exim now does this explicitly; it affects the formatting of
6956 timestamps using strftime().
6958 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6959 complaints. I've now initialized all the variables, to avoid this.
6961 32. Header lines added by a system filter were not being "seen" during
6962 transport-time rewrites.
6964 33. The info_callback() function passed to OpenSSL is set up with type void
6965 (*)(SSL *, int, int), as described somewhere. However, when calling the
6966 function (actually a macro) that sets it up, the type void(*)() is
6967 expected. I've put in a cast to prevent warnings from picky compilers.
6969 34. If a DNS black list lookup found a CNAME record, but there were no A
6970 records associated with the domain it pointed at, Exim crashed.
6972 35. If a DNS black list lookup returned more than one A record, Exim ignored
6973 all but the first. It now scans all returned addresses if a particular IP
6974 value is being sought. In this situation, the contents of the
6975 $dnslist_value variable are a list of all the addresses, separated by a
6978 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6979 to accept a host name and all its aliases if the forward lookup for any of
6980 them yielded the IP address of the incoming connection. Now it accepts only
6981 those names whose forward lookup yields the correct IP address. Any other
6982 names are discarded. This closes a loophole whereby a rogue DNS
6983 administrator could create reverse DNS records to break through a
6984 wildcarded host restriction in an ACL.
6986 37. If a user filter or a system filter that ran in a subprocess used any of
6987 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6988 the wrong values were passed to the pipe command ($thisaddress had the
6989 value of $0, $0 had the value of $1, etc). This bug was introduced by
6990 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6992 38. Improved the line breaking for long SMTP error messages from ACLs.
6993 Previously, if there was no break point between 40 and 75 characters, Exim
6994 left the rest of the message alone. Two changes have been made: (a) I've
6995 reduced the minimum length to 35 characters; (b) if it can't find a break
6996 point between 35 and 75 characters, it looks ahead and uses the first one
6997 that it finds. This may give the occasional overlong line, but at least the
6998 remaining text gets split now.
7000 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7001 file descriptors might be low, and that setting 1000 would always raise it.
7002 It turns out that in some environments, the limit is already over 1000 and
7003 that lowering it causes trouble. So now Exim takes care not to decrease it.
7005 40. When delivering a message, the value of $return_path is set to $sender_
7006 address at the start of routing (routers may change the value). By an
7007 oversight, this default was not being set up when an address was tested by
7008 -bt or -bv, which affected the outcome if any router or filter referred to
7011 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7012 log only when "message" or "log_message" are set. However, if one of the
7013 conditions was an address verification, or a call to a nested ACL, the
7014 messages generated by the underlying test were being passed through. This
7015 no longer happens. The underlying message is available in $acl_verify_
7016 message for both "message" and "log_message" expansions, so it can be
7017 passed through if needed.
7019 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7020 new expansion $bh_ to give the encoded byte string without charset
7021 translation. Translation happens only if iconv() is available; HAVE_ICONV
7022 indicates this at build time. HEADERS_CHARSET gives the charset to
7023 translate to; headers_charset can change it in the configuration, and
7024 "headers charset" can change it in an individual filter file.
7026 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7027 that creates RFC 2047 encoded "words" labels them as that charset instead
7028 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7029 expansion operator; (ii) when Exim creates a From: line for a local
7030 message; (iii) when a header line is rewritten to include a "phrase" part.
7032 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7033 buggy, causing it to skip the first lines of messages whose message ID
7034 ended in 'D'. This would not have bitten before Exim release 4.14, because
7035 message IDs were unlikely to end in 'D' before then. The effect was to have
7036 incorrect size information for certain domains.
7038 45. #include "config.h" was missing at the start of the crypt16.c module. This
7039 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7042 46. If there was a timeout during a "random" callout check, Exim treated it as
7043 a failure of the random address, and carried on sending RSET and the real
7044 address. If the delay was just some slowness somewhere, the response to the
7045 original RCPT would be taken as a response to RSET and so on, causing
7046 mayhem of various kinds.
7048 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7049 when I implemented it. It didn't allow for the fact that some option values
7050 may legitimately be negative (e.g. size_addition), and it didn't even do
7051 the right test for positive values.
7053 48. Domain names in DNS records are case-independent. Exim always looks them up
7054 in lower case. Some resolvers return domain names in exactly the case they
7055 appear in the zone file, that is, they may contain uppercase letters. Not
7056 all resolvers do this - some return always lower case. Exim was treating a
7057 change of case by a resolver as a change of domain, similar to a widening
7058 of a domain abbreviation. This triggered its re-routing code and so it was
7059 trying to route what was effectively the same domain again. This normally
7060 caused routing to fail (because the router wouldn't handle the domain
7061 twice). Now Exim checks for this case specially, and just changes the
7062 casing of the domain that it ultimately uses when it transmits the message
7065 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7068 50. If a filter generated a file delivery with a non-absolute name (possible if
7069 no home directory exists for the router), the forbid_file option was not
7072 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7073 the existing equality matching.
7075 52. Exim was using ints instead of ino_t variables in some places where it was
7076 dealing with inode numbers.
7078 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7079 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7080 called TMPDIR, and if it finds it is different, it changes its value.
7082 54. The smtp_printf() function is now made available to local_scan() so
7083 additional output lines can be written before returning. There is also an
7084 smtp_fflush() function to enable the detection of a dropped connection.
7085 The variables smtp_input and smtp_batched_input are exported to
7088 55. Changed the default runtime configuration: the message "Unknown user"
7089 has been removed from the ACL, and instead placed on the localuser router,
7090 using the cannot_route_message feature. This means that any verification
7091 failures that generate their own messages won't get overridden. Similarly,
7092 the "Unrouteable address" message that was in the ACL for unverifiable
7093 relay addresses has also been removed.
7095 56. Added hosts_avoid_esmtp to the smtp transport.
7097 57. The exicyclog script was not checking for the esoteric option
7098 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7099 will work only if exicyclog is run under the appropriate euid.
7101 58. Following a discussion on the list, the rules by which Exim recognises line
7102 endings on incoming messages have been changed. The -dropcr and drop_cr
7103 options are now no-ops, retained only for backwards compatibility. The
7104 following line terminators are recognized: LF CRLF CR. However, special
7105 processing applies to CR:
7107 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7108 nor a local message in the state where . is a terminator.
7110 (ii) If a bare CR is encountered in a header line, an extra space is added
7111 after the line terminator so as not to end the header. The reasoning
7112 behind this is that bare CRs in header lines are most likely either
7113 to be mistakes, or people trying to play silly games.
7115 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7116 was being incorrectly given as 18 bytes larger than it should have been.
7117 This is a VOB (very old bug).
7119 60. This may never have affected anything current, but just in case it has:
7120 When the local host is found other than at the start of a list of hosts,
7121 the local host, those with the same MX, and any that follow, are discarded.
7122 When the list in question was part of a longer list of hosts, the following
7123 hosts (not currently being processed) were also being discarded. This no
7124 longer happens. I'm not sure if this situation could ever has previously
7127 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7130 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7131 header. This is something that is recommended in a new Internet Draft, and
7132 is something that is documented as being done by Sendmail. There are two
7133 possible values. For messages generated by the autoreply transport, Exim
7136 Auto-Submitted: auto-replied
7138 whereas for all other generated messages (e.g. bounces) it adds
7140 Auto-Submitted: auto-generated
7142 63. The "personal" condition in filters now includes a test for the
7143 Auto-Submitted: header. If it contains the string "auto-" the message it
7144 not considered personal.
7146 64. Added rcpt_include_affixes as a generic transport option.
7148 65. Added queue_only_override (default true).
7150 66. Added the syslog_duplication option.
7152 67. If what should have been the first header line of a message consisted of
7153 a space followed by a colon, Exim was mis-interpreting it as a header line.
7154 It isn't of course - it is syntactically invalid and should therefore be
7155 treated as the start of the message body. The misbehaviour could have
7156 caused a number of strange effects, including loss of data in subsequent
7157 header lines, and spool format errors.
7159 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7160 client host had authenticated. This control can now be exercised by an ACL
7161 for more flexibility.
7163 69. By default, callouts do not happen when testing with -bh. There is now a
7164 variant, -bhc, which does actually run the callout code, including
7165 consulting and updating the callout cache.
7167 70. Added support for saslauthd authentication, courtesy of Alexander
7170 71. If statvfs() failed on the spool or log directories while checking their
7171 size for availability, Exim confusingly gave the error "space shortage".
7172 Furthermore, in debugging mode it crashed with a floating point exception.
7173 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7174 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7175 serious problem, Exim now writes to the main and panic logs when this
7176 happens, with details of the failure. It then refuses to accept the
7177 incoming message, giving the message "spool directory problem" or "log
7178 directory problem" with a 421 code for SMTP messages.
7180 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7181 0, 1, and 2 exist, because some OS complain for execs without them (see
7182 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7183 descriptors. However, the code omitted to check that the open succeeded,
7184 causing mysterious errors if for some reason the permissions on /dev/null
7185 got screwed. Now Exim writes a message to the main and panic logs, and
7186 bombs out if it can't open /dev/null.
7188 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7189 interact so that it is all more flexible. It is supposed to remain
7190 backwards compatible. Also added extra_local_interfaces.
7192 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7193 to bomb out with an assertion failure - to the client this appears as a
7194 connection drop. This problem occurs in the part of the code that was taken
7195 from the Samba project. Fortunately, the assertion is in a very simple
7196 function, so I have fixed this by reproducing the function inline in the
7197 one place where it is called, and arranging for authentication to fail
7198 instead of killing the process with assert().
7200 75. The SPA client code was not working when the server requested OEM rather
7201 than Unicode encoding.
7203 76. Added code to make require_files with a specific uid setting more usable in
7204 the case where statting the file as root fails - usually a non-root-mounted
7205 NFS file system. When this happens and the failure is EACCES, Exim now
7206 forks a subprocess and does the per-uid checking as the relevant uid.
7208 77. Added process_log_path.
7210 78. If log_file_path was not explicitly set, a setting of check_log_space or
7211 check_log_inodes was ignored.
7213 79. If a space check for the spool or log partitions fails, the incident is now
7214 logged. Of course, in the latter case the data may get lost...
7216 80. Added the %p formatting code to string_format() so that it can be used to
7217 print addresses in debug_print(). Adjusted all the address printing in the
7218 debugging in store.c to use %p rather than %d.
7220 81. There was a concern that a line of code in smtp_in.c could overflow a
7221 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7222 initially expressed, the concern was not well-founded, because trailing
7223 spaces are removed early. However, if the trailing spaces were followed by
7224 a NULL, they did not get removed, so the overflow was possible. Two fixes
7227 (a) I re-wrote the offending code in a cleaner fashion.
7228 (b) If an incoming SMTP command contains a NULL character, it is rejected
7231 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7232 runs initgroups(), so that if the Exim user is in any additional groups,
7233 they will be used during message reception.
7239 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob