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.
48 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
49 When redis_servers is set to a list of > 1 element, and the Redis servers
50 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
51 case of MOVED into a DEFER case instead, thus moving the query onto the
52 next server in the list. For a cluster of N elements, all N servers must
53 be defined in redis_servers.
55 GF/02 Catch and remove uninitialized value warning in exiqsumm
56 Check for existence of @ARGV before looking at $ARGV[0]
58 JH/01 Replace the store_release() internal interface with store_newblock(),
59 which internalises the check required to safely use the old one, plus
60 the allocate and data copy operations duplicated in both (!) of the
63 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
64 modifier. This matches the restriction on the commandline.
66 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
67 Previously only the last row was returned.
69 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
70 we assumed that tags in the header were well-formed, and parsed the
71 element content after inspecting only the first char of the tag.
72 Assumptions at that stage could crash the receive process on malformed
75 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
76 While running the DKIM ACL we operate on the Permanent memory pool so that
77 variables created with "set" persist to the DATA ACL. Also (at any time)
78 DNS lookups that fail create cache records using the Permanent pool. But
79 expansions release any allocations made on the current pool - so a dnsdb
80 lookup expansion done in the DKIM ACL releases the memory used for the
81 DNS negative-cache, and bad things result. Solution is to switch to the
82 Main pool for expansions.
83 While we're in that code, add checks on the DNS cache during store_reset,
84 active in the testsuite.
85 Problem spotted, and debugging aided, by Wolfgang Breyha.
87 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
88 When none of the hosts presented to a transport match an already-open
89 connection, close it and proceed with the list. Previously we would
90 queue the message. Spotted by Lena with Yahoo, probably involving
93 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
94 Previously a spurious "250 OK id=" response was appended to the proper
97 JH/08 The "support for" informational output now, which built with Content
98 Scanning support, has a line for the malware scanner interfaces compiled
99 in. Interface can be individually included or not at build time.
101 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
102 by the template makefile "src/EDITME". The "STREAM" support for an older
103 ClamAV interface method is removed.
105 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
106 rows affected is given instead).
108 JH/11 The runtime Berkeley DB library version is now additionally output by
109 "exim -d -bV". Previously only the compile-time version was shown.
111 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
112 SMTP connection. Previously, when one had more receipients than the
113 first, an abortive onward connection was made. Move to full support for
114 multiple onward connections in sequence, handling cutthrough connection
115 for all multi-message initiating connections.
117 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
118 routers. Previously, a multi-recipient message would fail to match the
119 onward-connection opened for the first recipient, and cause its closure.
121 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
122 a timeout on read on a GnuTLS initiating connection, resulting in the
123 initiating connection being dropped. This mattered most when the callout
124 was marked defer_ok. Fix to keep the two timeout-detection methods
127 JH/15 Relax results from ACL control request to enable cutthrough, in
128 unsupported situations, from error to silently (except under debug)
129 ignoring. This covers use with PRDR, frozen messages, queue-only and
132 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
134 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
135 metadata, resulting in a crash in free().
137 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
138 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
139 Broken also in d185889f4, with init system revamp.
141 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
142 Previously we abruptly closed the connection after reading a malware-
143 found indication; now we go on to read the "scan ok" response line,
146 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
147 ACL. Previously, a crash would result.
149 JH/19 Speed up macro lookups during configuration file read, by skipping non-
150 macro text after a replacement (previously it was only once per line) and
151 by skipping builtin macros when searching for an uppercase lead character.
153 JH/20 DANE support moved from Experimental to mainline. The Makefile control
154 for the build is renamed.
156 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
157 was allocated for every new TLS startup, meaning one per message. Fix
158 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
160 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
161 reported the original. Fix to report (as far as possible) the ACL
162 result replacing the original.
164 JH/23 Fix memory leak during multi-message connections using STARTTLS under
165 OpenSSL. Certificate information is loaded for every new TLS startup,
166 and the resources needed to be freed.
168 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
170 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
173 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
174 DATA response info to the (existing) per-recipient response info for
175 the "C=" log element. It can have useful tracking info from the
176 destination system. Patch from Simon Arlott.
178 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
179 length value. Previously this would segfault.
181 HS/02 Support Avast multiline protoocol, this allows passing flags to
182 newer versions of the scanner.
184 JH/28 Ensure that variables possibly set during message acceptance are marked
185 dead before release of memory in the daemon loop. This stops complaints
186 about them when the debug_store option is enabled. Discovered specifically
187 for sender_rate_period, but applies to a whole set of variables.
188 Do the same for the queue-runner and queue-list loops, for variables set
189 from spool message files. Do the same for the SMTP per-message loop, for
190 certain variables indirectly set in ACL operations.
192 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
193 as a multi-recipient message from a mailinglist manager). The coding had
194 an arbitrary cutoff number of characters while checking for more input;
195 enforced by writing a NUL into the buffer. This corrupted long / fast
196 input. The problem was exposed more widely when more pipelineing of SMTP
197 responses was introduced, and one Exim system was feeding another.
198 The symptom is log complaints of SMTP syntax error (NUL chars) on the
199 receiving system, and refused recipients seen by the sending system
200 (propating to people being dropped from mailing lists).
201 Discovered and pinpointed by David Carter.
203 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
204 replaced by the ${authresults } expansion.
206 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
208 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
209 allows proper process termination in container environments.
211 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
212 Previously the "final dot" had a newline after it; ensure it is CR,LF.
214 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
215 and "err_perm", deprecated since 4.83 when the RFC-defined words
216 "temperror" and "permerror" were introduced.
218 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
219 transport-filters or DKIM-signing. The restriction was lost in the
220 consolidation of verify-callout and delivery SMTP handling.
221 Extend the restriction to also cover ARC-signing.
223 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
224 in defer=pass mode supply a 450 to the initiator. Previously the message
227 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
228 tls_require_ciphers is used as before.
230 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
231 "pass_unscanned". Only tmpfails from the scanner are written to
232 the paniclog, as they may require admin intervention (permission
233 denied, license issues). Other scanner errors (like decompression
234 bombs) do not cause a paniclog entry.
236 JH/36 Fix reinitialisation of DKIM logging variable between messages.
237 Previously it was possible to log spurious information in receive log
240 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
241 triggered odd behaviour from Outlook Express clients.
243 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
246 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
247 since the IETF WG has not yet settled on that versus the original
248 "bare" representation.
250 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
251 Previously the millisecond value corrupted the output.
252 Fix also for syslog_pid=no and log_selector +pid, for which the pid
253 corrupted the output.
259 JH/01 Rework error string handling in TLS interface so that the caller in
260 more cases is responsible for logging. This permits library-sourced
261 string to be attached to addresses during delivery, and collapses
262 pairs of long lines into single ones.
264 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
265 during configuration. Wildcards are allowed and expanded.
267 JH/02 Rework error string handling in DKIM to pass more info back to callers.
268 This permits better logging.
270 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
271 do not close it down and have the child transport start it up again on
272 the passed-on TCP connection. Instead, proxy the child (and any
273 subsequent ones) for TLS via a unix-domain socket channel. Logging is
274 affected: the continued delivery log lines do not have any DNSSEC, TLS
275 Certificate or OCSP information. TLS cipher information is still logged.
277 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
278 identical IP addresses on different listening ports. Will also affect
281 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
282 add noisy ifdef guards to special-case this sillyness.
283 Patch from Bernd Kuhls.
285 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
286 than 255 are no longer allowed.
288 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
289 Disable the session-cache too, which might reduce our load. Since we
290 currrectly use a new context for every connection, both as server and
291 client, there is no benefit for these.
292 GnuTLS appears to not support tickets server-side by default (we don't
293 call gnutls_session_ticket_enable_server()) but client side is enabled
294 by default on recent versions (3.1.3 +) unless the PFS priority string
297 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
298 <https://reproducible-builds.org/specs/source-date-epoch/>.
300 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
301 the check for any unsuccessful recipients did not notice the limit, and
302 erroneously found still-pending ones.
304 JH/08 Pipeline CHUNKING command and data together, on kernels that support
305 MSG_MORE. Only in-clear (not on TLS connections).
307 JH/09 Avoid using a temporary file during transport using dkim. Unless a
308 transport-filter is involved we can buffer the headers in memory for
309 creating the signature, and read the spool data file once for the
310 signature and again for transmission.
312 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
313 4.77 as the kernel support then wasn't solid, having issues in 64bit
314 mode. Now, it's been long enough. Add support for FreeBSD also.
316 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
317 case where the routing stage had gathered several addresses to send to
318 a host before calling the transport for the first, we previously failed
319 to close down TLS in the old transport process before passing the TCP
320 connection to the new process. The new one sent a STARTTLS command
321 which naturally failed, giving a failed delivery and bloating the retry
322 database. Investigation and fix prototype from Wolfgang Breyha.
324 JH/12 Fix check on SMTP command input synchronisation. Previously there were
325 false-negatives in the check that the sender had not preempted a response
326 or prompt from Exim (running as a server), due to that code's lack of
327 awareness of the SMTP input buffering.
329 PP/04 Add commandline_checks_require_admin option.
330 Exim drops privileges sanely, various checks such as -be aren't a
331 security problem, as long as you trust local users with access to their
332 own account. When invoked by services which pass untrusted data to
333 Exim, this might be an issue. Set this option in main configuration
334 AND make fixes to the calling application, such as using `--` to stop
337 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
338 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
339 responses to those, into a single TLS record each way (this usually means
340 a single packet). As a side issue, smtp_enforce_sync now works on TLS
343 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
344 affects you only if you're dancing at the edge of the param size limits.
345 If you are, and this message makes sense to you, then: raise the
346 configured limit or use OpenSSL 1.1. Nothing we can do for older
349 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
350 cmdline element to get the documented default one. Previously it was
353 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
354 are unsuable for non-message-specific reasons - eg. connection timeout,
355 banner-time rejection.
357 JH/16 Fix logging of delivery remote port, when specified by router, under
360 PP/06 Repair manualroute's ability to take options in any order, even if one
361 is the name of a transport.
364 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
366 JH/17 Change the list-building routines interface to use the expanding-string
367 triplet model, for better allocation and copying behaviour.
369 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
370 Previously it was constructed the first time a possibly-matching string
371 was met in the configuration file input during startup; now it is done
374 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
375 compatible one, to avoid the (poorly documented) possibility of a config
376 file in the working directory redirecting the DB files, possibly correpting
377 some existing file. CVE-2017-10140 assigned for BDB.
379 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
380 cache-hot. Previously, although the result was properly cached, the
381 initial verify call returned a defer.
383 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
384 the main verify for receipient in uncached-mode.
386 JH/22 Retire historical build files to an "unsupported" subdir. These are
387 defined as "ones for which we have no current evidence of testing".
389 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
390 if present. Previously it was ignored.
392 JH/24 Start using specified-initialisers in C structure init coding. This is
393 a C99 feature (it's 2017, so now considered safe).
395 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
396 if was a fixed-sized field and bitmask ops via macros; it is now more
399 PP/07 GitHub PR 56: Apply MariaDB build fix.
400 Patch provided by Jaroslav Škarvada.
402 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
403 during Coverity cleanups [4.87 JH/47]
404 Diagnosis and fix provided by Michael Fischer v. Mollard.
406 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
407 the right size to place the terminating semicolon on its own folded
408 line, the header hash was calculated to an incorrect value thanks to
409 the (relaxed) space the fold became.
411 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
412 and confused the parent.
414 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
415 which could crash as a result. This could lead to undeliverable messages.
417 JH/28 Logging: "next input sent too soon" now shows where input was truncated
420 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
421 matters on fast-turnover and PID-randomising systems, which were getting
422 out-of-order delivery.
424 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
425 a possibly-overlapping copy. The symptom was that "Remote host closed
426 connection in response to HELO" was logged instead of the actual 4xx
429 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
430 Previously only that bufferd was discarded, resulting in SYMTP command
433 JH/32 DKIM: when a message has multiple signatures matching an identity given
434 in dkim_verify_signers, run the dkim acl once for each. Previously only
435 one run was done. Bug 2189.
437 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
438 "panic the current process" to "deliberately defer". The panic log is
439 still written with the problem list name; the mail and reject logs now
440 get a temp-reject line for the message that was being handled, saying
441 something like "domains check lookup or other defer". The SMTP 451
442 message is still "Temporary local problem".
444 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
445 A crafted sequence of BDAT commands could result in in-use memory beeing
446 freed. CVE-2017-16943.
448 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
449 from SMTP input. Previously it was always done; now only done for DATA
450 and not BDAT commands. CVE-2017-16944.
452 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
453 to the message (such as an overlong header line). Previously this was
454 not done and we did not exit BDAT mode. Followon from the previous item
455 though a different problem.
461 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
462 than -2003 did; needs libidn2 in addition to libidn.
464 JH/02 The path option on a pipe transport is now expanded before use.
466 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
467 Patch provided by "Björn", documentation fix added too.
469 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
470 missing a wire-to-host endian conversion.
472 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
473 close after a BDAT command line could be taken as a following command,
474 giving a synch failure. Fix by only checking for synch immediately
475 before acknowledging the chunk.
477 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
478 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
479 macro. Patches provided by Josh Soref.
481 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
482 Previously we did not; the RFC seems ambiguous and VRFY is not listed
483 by IANA as a service extension. However, John Klensin suggests that we
486 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
487 the dkim code may be unix-mode line endings rather than smtp wire-format
488 CRLF, so prepend a CR to any bare LF.
490 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
491 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
493 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
494 the first were themselves being wrongly included in the feed into dkim
495 processing; with most chunk sizes in use this resulted in an incorrect
496 body hash calculated value.
498 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
499 DKIM signature block, for verification. Although advised against by
500 standards it is specifically not ruled illegal.
502 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
504 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
505 missing a body hash (the bh= tag).
507 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
508 It seems that HAProxy sends the Proxy Protocol information in clear and
509 only then does a TLS startup, so do the same.
511 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
512 TCP connections (such as for Spamd) unless the daemon successfully set
513 Fast Open mode on its listening sockets. This fixes breakage seen on
514 too-old kernels or those not configured for Fast Open, at the cost of
515 requiring both directions being enabled for TFO, and TFO never being used
516 by non-daemon-related Exim processes.
518 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
519 endings, at least on the first header line. Try to canonify any that get
520 past that check, despite the cost.
522 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
523 now limited to an arbitrary five deep, while parsing addresses with the
524 strip_excess_angle_brackets option enabled.
526 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
527 instead leave the unprompted TLS handshake in socket buffer for the
528 TLS library to consume.
530 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
532 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
534 JH/16 Drop variables when they go out of scope. Memory management drops a whole
535 region in one operation, for speed, and this leaves assigned pointers
536 dangling. Add checks run only under the testsuite which checks all
537 variables at a store-reset and panics on a dangling pointer; add code
538 explicitly nulling out all the variables discovered. Fixes one known
539 bug: a transport crash, where a dangling pointer for $sending_ip_address
540 originally assigned in a verify callout, is re-used.
542 PP/06 Drop '.' from @INC in various Perl scripts.
544 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
546 PP/08 Reduce a number of compilation warnings under clang; building with
547 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
548 should be warning-free.
550 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
552 HS/01 Fix portability problems introduced by PP/08 for platforms where
553 realloc(NULL) is not equivalent to malloc() [SunOS et al].
555 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
556 chunk. This allows us to accept broken chunked messages. We need a more
557 general solution here.
559 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
560 already-broken messages in the queue.
562 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
564 JH/19 Fix reference counting bug in routing-generated-address tracking.
570 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
571 supports it and a size is available (ie. the sending peer gave us one).
573 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
574 years of being deprecated). The replacements are the ACLs
575 acl_smtp_mime and acl_not_smtp_mime.
577 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
578 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
579 or even an in-clear connection were permitted. Now, if the host lookup
580 was dnssec and dane was requested then the host is only used if the
581 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
582 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
583 if one fails this test.
584 This means that a poorly-configured remote DNS will make it incommunicado;
585 but it protects against a DNS-interception attack on it.
587 JH/04 Bug 1810: make continued-use of an open smtp transport connection
588 non-noisy when a race steals the message being considered.
590 JH/05 If main configuration option tls_certificate is unset, generate a
591 self-signed certificate for inbound TLS connections.
593 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
594 in rewrites and routers.
596 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
597 and logged a warning sing 4.83; now they are a configuration file error.
599 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
600 (lacking @domain). Apply the same qualification processing as RCPT.
602 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
604 JH/10 Support ${sha256:} applied to a string (as well as the previous
607 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
608 a cutthrough deliver is pending, as we always want to make a connection.
609 This also avoids re-routing the message when later placing the cutthrough
610 connection after a verify cache hit.
611 Do not update it with the verify result either.
613 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
614 when routing results in more than one destination address.
616 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
617 signing (which inhibits the cutthrough capability). Previously only
618 the presence of an option was tested; now an expansion evaluating as
619 empty is permissible (obviously it should depend only on data available
620 when the cutthrough connection is made).
622 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
623 the relevant preceding SMTP command did not note the pipelining mode.
625 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
626 Previously they were not counted.
628 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
629 as one having no matching records. Previously we deferred the message
630 that needed the lookup.
632 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
633 distinguished as "(=".
635 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
636 for missing MX records. Previously it only worked for missing A records.
638 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
640 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
641 after the data-go-ahead and data-ack. Patch from Jason Betts.
643 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
644 even for a "none" policy. Patch from Tony Meyer.
646 JH/22 Fix continued use of a connection for further deliveries. If a port was
647 specified by a router, it must also match for the delivery to be
650 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
651 When one of the recipients of a message was unsuitable for the connection
652 (has no matching addresses), we lost track of needing to mark it
653 deferred. As a result mail would be lost.
655 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
657 JH/25 Decoding ACL controls is now done using a binary search; the source code
658 takes up less space and should be simpler to maintain. Merge the ACL
659 condition decode tables also, with similar effect.
661 JH/26 Fix problem with one_time used on a redirect router which returned the
662 parent address unchanged. A retry would see the parent address marked as
663 delivered, so not attempt the (identical) child. As a result mail would
666 JH/27 Fix a possible security hole, wherein a process operating with the Exim
667 UID can gain a root shell. Credit to http://www.halfdog.net/ for
668 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
671 JH/28 Enable {spool,log} filesystem space and inode checks as default.
672 Main config options check_{log,spool}_{inodes,space} are now
673 100 inodes, 10MB unless set otherwise in the configuration.
675 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
676 Previously it only applied to the main-section connection policy
679 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
681 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
682 by me. Added RFC7919 DH primes as an alternative.
684 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
685 are not in the system include path.
687 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
688 GnuTLS, when a session startup failed (eg because the client disconnected)
689 Exim did stdio operations after fclose. This was exposed by a recent
690 change which nulled out the file handle after the fclose.
692 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
693 signed directly by the cert-signing cert, rather than an intermediate
694 OCSP-signing cert. This is the model used by LetsEncrypt.
696 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
698 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
699 an incoming connection.
701 HS/02 Bug 1802: Do not half-close the connection after sending a request
704 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
705 fallback to "prime256v1".
707 JH/34 SECURITY: Use proper copy of DATA command in error message.
708 Could leak key material. Remotely exploitable. CVE-2016-9963.
714 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
715 and 3.4.4 - once the server is enabled to respond to an OCSP request
716 it does even when not requested, resulting in a stapling non-aware
717 client dropping the TLS connection.
719 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
720 support variable-length bit vectors. No functional change.
722 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
723 The I= interface field on outgoing lines is now after the H= remote
724 host field, same as incoming lines. There is a separate
725 outgoing_interface log selector which allows you to disable the
728 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
729 If not running log_selector +smtp_connection the mainlog would be held
730 open indefinitely after a "too many connections" event, including to a
731 deleted file after a log rotate. Leave the per net connection logging
732 leaving it open for efficiency as that will be quickly detected by the
733 check on the next write.
735 HS/01 Bug 1671: Fix post transport crash.
736 Processing the wait-<transport> messages could crash the delivery
737 process if the message IDs didn't exist for some reason. When
738 using 'split_spool_directory=yes' the construction of the spool
739 file name failed already, exposing the same netto behaviour.
741 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
742 mime_regex ACL conditions.
744 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
745 to DSN fail messages (bounces): remote IP, remote greeting, remote response
746 to HELO, local diagnostic string.
748 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
749 log line to debug. Even when configured with a tls authenticator many
750 client connections are expected to not authenticate in this way, so
751 an authenticate fail is not an error.
753 HS/02 Add the Exim version string to the process info. This way exiwhat
754 gives some more detail about the running daemon.
756 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
757 matter for fast-change records such as DNSBLs.
759 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
760 retry record, even if constant. There may be multiple transports with
761 different interface settings and the retry behaviour needs to be kept
764 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
766 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
768 JH/10 Bug 840: fix log_defer_output option of pipe transport
770 JH/11 Bug 830: use same host for all RCPTS of a message, even under
771 hosts_randomize. This matters a lot when combined with mua_wrapper.
773 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
774 ${quote_pgsql:<string>} operator.
776 JH/13 Bug 1708: avoid misaligned access in cached lookup.
778 JH/14 Change header file name for freeradius-client. Relevant if compiling
779 with Radius support; from the Gentoo tree and checked under Fedora.
781 JH/15 Bug 1712: Introduce $prdr_requested flag variable
783 JH/16 Bug 1714: Permit an empty string as expansion result for transport
784 option transport_filter, meaning no filtering.
786 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
788 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
789 defaults to "*" (all hosts). The variable is now available when not built
790 with TLS, default unset, mainly to enable keeping the testsuite sane.
791 If a server certificate is not supplied (via tls_certificate) an error is
792 logged, and clients will find TLS connections fail on startup. Presumably
793 they will retry in-clear.
794 Packagers of Exim are strongly encouraged to create a server certificate
795 at installation time.
797 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
798 with the $config_file variable.
800 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
801 in transport context, after the attempt, and per-recipient. The latter type
802 is per host attempted. The event data is the error message, and the errno
803 information encodes the lookup type (A vs. MX) used for the (first) host,
804 and the trailing two digits of the smtp 4xx response.
806 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
807 to write to mainlog (or rejectlog, paniclog) in the window between file
808 creation and permissions/ownership being changed. Particularly affects
809 installations where exicyclog is run as root, rather than exim user;
810 result is that the running daemon panics and dies.
812 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
814 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
815 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
816 "pri" and "weight". Note that the previous implicit priority given by the
817 list order is no longer honoured.
819 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
822 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
823 by defining SUPPORT_SOCKS.
825 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
826 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
827 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
828 variables are renamed to proxy_{local,external}_{address,port}.
830 JH/27 Move Internationalisation support from Experimental to mainline, enabled
831 for a build by defining SUPPORT_I18N
833 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
834 of the query string, and make ${quote_redis:} do that quoting.
836 JH/29 Move Events support from Experimental to mainline, enabled by default
837 and removable for a build by defining DISABLE_EVENT.
839 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
841 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
842 cached by the daemon.
844 JH/32 Move Redis support from Experimental to mainline, enabled for a build
845 by defining LOOKUP_REDIS. The libhiredis library is required.
847 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
848 keys are given for lookup.
850 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
851 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
852 only supported when built with TLS support. The PolarSSL SHA routines
853 are still used when the TLS library is too old for convenient support.
855 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
856 openssl_options), for security. OpenSSL forces this from version 1.1.0
857 server-side so match that on older versions.
859 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
860 allocation for $value could be released as the expansion processing
861 concluded, but leaving the global pointer active for it.
863 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
864 and to use the domains and local_parts ACL conditions.
866 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
867 incorrectly not doubled on cutthrough transmission, hence seen as a
868 body-termination at the receiving system - resulting in truncated mails.
869 Commonly the sender saw a TCP-level error, and retransmitted the message
870 via the normal store-and-forward channel. This could result in duplicates
871 received - but deduplicating mailstores were liable to retain only the
872 initial truncated version.
874 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
876 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
878 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
879 we're in there, support oversigning also; bug 1309.
881 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
883 HS/04 Add support for keep_environment and add_environment options.
885 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
886 either intentional arithmetic overflow during PRNG, or testing config-
889 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
890 delivery resulted in actual delivery. Cancel cutthrough before DATA
893 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
894 rejects a recipient: pass the reject to the originator.
896 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
897 Many were false-positives and ignorable, but it's worth fixing the
900 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
901 for the new environment-manipulation done at startup. Move the routines
902 from being local to tls.c to being global via the os.c file.
904 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
905 an extract embedded as result-arg for a map, the first arg for extract
906 is unavailable so we cannot tell if this is a numbered or keyed
907 extraction. Accept either.
913 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
916 JH/02 The smtp transport option "multi_domain" is now expanded.
918 JH/03 The smtp transport now requests PRDR by default, if the server offers
921 JH/04 Certificate name checking on server certificates, when exim is a client,
922 is now done by default. The transport option tls_verify_cert_hostnames
923 can be used to disable this per-host. The build option
924 EXPERIMENTAL_CERTNAMES is withdrawn.
926 JH/05 The value of the tls_verify_certificates smtp transport and main options
927 default to the word "system" to access the system default CA bundle.
928 For GnuTLS, only version 3.0.20 or later.
930 JH/06 Verification of the server certificate for a TLS connection is now tried
931 (but not required) by default. The verification status is now logged by
932 default, for both outbound TLS and client-certificate supplying inbound
935 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
938 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
939 Status Notification (bounce) messages are now MIME format per RFC 3464.
940 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
941 under the control of the dsn_advertise_hosts option, and routers may
942 have a dsn_lasthop option.
944 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
945 default, modifiable by a malware= option. The list separator for
946 the options can now be changed in the usual way. Bug 68.
948 JH/10 The smtp_receive_timeout main option is now expanded before use.
950 JH/11 The incoming_interface log option now also enables logging of the
951 local interface on delivery outgoing connections.
953 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
954 if the interface and destination host and port all match.
956 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
959 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
960 Patch from Andrew Lewis.
962 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
963 now supports optional time-restrictions, weighting, and priority
964 modifiers per server. Patch originally by <rommer@active.by>.
966 JH/16 The spamd_address main option now supports a mixed list of local
967 and remote servers. Remote servers can be IPv6 addresses, and
968 specify a port-range.
970 JH/17 Bug 68: The spamd_address main option now supports an optional
971 timeout value per server.
973 JH/18 Bug 1581: Router and transport options headers_add/remove can
974 now have the list separator specified.
976 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
979 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
982 JH/21 Support for the A6 type of dns record is withdrawn.
984 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
985 rather than the verbs used.
987 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
988 from 255 to 1024 chars.
990 JH/24 Verification callouts now attempt to use TLS by default.
992 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
993 are generic router options now. The defaults didn't change.
995 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
996 Original patch from Alexander Shikoff, worked over by JH.
998 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
999 files if ZCAT_COMMAND is not executable.
1001 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1003 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1005 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1006 Normally benign, it bites when the pair was led to by a CNAME;
1007 modern usage is to not canonicalize the domain to a CNAME target
1008 (and we were inconsistent anyway for A-only vs AAAA+A).
1010 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1012 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1013 when evaluating $sender_host_dnssec.
1015 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1016 $sender_helo_dnssec variable.
1018 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1020 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1022 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1024 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1025 documented as working, but never had. Support all but $spam_report.
1027 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1028 added for tls authenticator.
1030 HS/03 Add perl_taintmode main config option
1036 TL/01 When running the test suite, the README says that variables such as
1037 no_msglog_check are global and can be placed anywhere in a specific
1038 test's script, however it was observed that placement needed to be near
1039 the beginning for it to behave that way. Changed the runtest perl
1040 script to read through the entire script once to detect and set these
1041 variables, reset to the beginning of the script, and then run through
1042 the script parsing/test process like normal.
1044 TL/02 The BSD's have an arc4random API. One of the functions to induce
1045 adding randomness was arc4random_stir(), but it has been removed in
1046 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1047 function when detected.
1049 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1050 cause callback expansion.
1052 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1053 syntax errors in an expansion can be treated as a string instead of
1054 logging or causing an error, due to the internal use of bool_lax
1055 instead of bool when processing it.
1057 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1058 server certificates when making smtp deliveries.
1060 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1062 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1064 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1066 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1067 Merged patch from Sebastian Wiedenroth.
1069 JH/05 Fix results-pipe from transport process. Several recipients, combined
1070 with certificate use, exposed issues where response data items split
1071 over buffer boundaries were not parsed properly. This eventually
1072 resulted in duplicates being sent. This issue only became common enough
1073 to notice due to the introduction of connection certificate information,
1074 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1076 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1077 size buffer was used, resulting in syntax errors when an expansion
1080 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1081 version 3.3.6 or later.
1083 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1084 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1085 both become "event_action", the variables become $event_name, $event_data
1086 and $event_defer_errno. There is a new variable $verify_mode, usable in
1087 routers, transports and related events. The tls:cert event is now also
1088 raised for inbound connections, if the main configuration event_action
1091 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1092 early OCSP support, but no stapling (appears to be less than 1.0.0).
1094 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1095 server certificate names available under the smtp transport option
1096 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1099 JH/10 Time-related extraction expansions from certificates now use the main
1100 option "timezone" setting for output formatting, and are consistent
1101 between OpenSSL and GnuTLS compilations. Bug 1541.
1103 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1104 encoded parameter in the incoming message. Bug 1558.
1106 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1107 include certificate info, eximon was claiming there were spoolfile
1110 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1112 JH/14 Log delivery-related information more consistently, using the sequence
1113 "H=<name> [<ip>]" wherever possible.
1115 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1116 are problematic for Debian distribution, omit them from the release
1119 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1121 JH/16 Fix string representation of time values on 64bit time_t architectures.
1124 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1125 output list separator was used.
1130 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1131 checkers that were complaining about end of non-void function with no
1134 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1135 This was a regression introduced in 4.83 by another bugfix.
1137 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1139 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1140 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1146 TF/01 Correctly close the server side of TLS when forking for delivery.
1148 When a message was received over SMTP with TLS, Exim failed to clear up
1149 the incoming connection properly after forking off the child process to
1150 deliver the message. In some situations the subsequent outgoing
1151 delivery connection happened to have the same fd number as the incoming
1152 connection previously had. Exim would try to use TLS and fail, logging
1153 a "Bad file descriptor" error.
1155 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1156 utilities have not been installed.
1158 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1159 temporary space as the ACL may create new global variables.
1161 TL/01 LDAP support uses per connection or global context settings, depending
1162 upon the detected version of the libraries at build time.
1164 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1165 to extract and use the src ip:port in logging and expansions as if it
1166 were a direct connection from the outside internet. PPv2 support was
1167 updated based on HAProxy spec change in May 2014.
1169 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1171 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1172 Properly escape header and check for NULL return.
1174 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1177 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1179 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1180 characters in header names, implemented as a verify condition.
1181 Contributed by Michael Fischer v. Mollard.
1183 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1184 results permerror and temperror. Previous values are deprecated but
1185 still accepted. In a future release, err_perm and err_temp will be
1186 completely removed, which will be a backward incompatibility if the
1187 ACL tests for either of these two old results. Patch contributed by
1188 user bes-internal on the mailing list.
1190 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1192 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1193 selectors, in both main and reject logs.
1195 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1198 JH/07 Add malware type "sock" for talking to simple daemon.
1200 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1202 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1203 routers/transports under cutthrough routing.
1205 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1206 numbers. Touch up "bool" conditional to keep the same definition.
1208 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1210 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1212 JH/12 Expand items in router/transport headers_add or headers_remove lists
1213 individually rather than the list as a whole. Bug 1452.
1215 Required for reasonable handling of multiple headers_ options when
1216 they may be empty; requires that headers_remove items with embedded
1217 colons must have them doubled (or the list-separator changed).
1219 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1220 view the policy declared in the DMARC record. Currently, $dmarc_status
1221 is a combined value of both the record presence and the result of the
1224 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1226 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1227 dnslookup router and the smtp transport (applying to the forward
1230 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1231 of ldap servers used for a specific lookup. Patch provided by Heiko
1234 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1235 New variable $lookup_dnssec_authenticated for observability.
1237 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1238 Patch submitted by Lars Timman.
1240 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1242 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1243 Requires trusted mode and valid format message id, aborts otherwise.
1244 Patch contributed by Heiko Schlichting.
1246 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1247 certextract with support for various fields. Bug 1358.
1249 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1250 is requested by default, modifiable by smtp transport option
1253 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1254 operate on certificate variables to give certificate fingerprints
1255 Also new ${sha256:cert_variable}.
1257 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1259 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1260 Christian Aistleitner.
1262 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1264 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1265 file. Patch from Wolfgang Breyha.
1267 JH/25 Expand the coverage of the delivery $host and $host_address to
1268 client authenticators run in verify callout. Bug 1476.
1270 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1271 align with daemon_smtp_ports. Bug 72.
1273 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1274 support and error reporting did not work properly.
1276 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1277 and is readable. Patch from Andrew Colin Kissa.
1279 TL/14 Enhance documentation of ${run expansion and how it parses the
1280 commandline after expansion, particularly in the case when an
1281 unquoted variable expansion results in an empty value.
1283 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1285 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1286 by renaming away from it. Addresses GH issue 15, reported by
1289 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1291 TL/15 SECURITY: prevent double expansion in math comparison functions
1292 (can expand unsanitized data). Not remotely exploitable.
1299 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1301 PP/02 Make -n do something, by making it not do something.
1302 When combined with -bP, the name of an option is not output.
1304 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1307 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1308 $sender_host_name and config options to manage this, and basic check
1311 PP/05 DSCP support for outbound connections and control modifier for inbound.
1313 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1314 (Only plugin which currently uses this is kerberos4, which nobody should
1315 be using, but we should make it available and other future plugins might
1316 conceivably use it, even though it would break NAT; stuff *should* be
1317 using channel bindings instead).
1319 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1320 name; added for Sendmail compatibility; requires admin caller.
1321 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1322 just ignore it); requires trusted caller.
1323 Also parse but ignore: -Ac -Am -X<logfile>
1326 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1328 TL/02 Add +smtp_confirmation as a default logging option.
1330 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1331 Patch by Magnus Holmgren from 2007-02-20.
1333 TL/04 Bugzilla 1281 - Spec typo.
1334 Bugzilla 1283 - Spec typo.
1335 Bugzilla 1290 - Spec grammar fixes.
1337 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1339 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1341 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1342 mailing list by by Dmitry Isaikin.
1344 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1346 JH/02 Support "G" suffix to numbers in ${if comparisons.
1348 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1350 NM/01 Bugzilla 1197 - Spec typo
1351 Bugzilla 1196 - Spec examples corrections
1353 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1355 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1356 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1359 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1360 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1362 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1363 "acl {{name}{arg}...}", and optional args on acl condition
1366 JH/05 Permit multiple router/transport headers_add/remove lines.
1368 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1370 JH/07 Avoid using a waiting database for a single-message-only transport.
1371 Performance patch from Paul Fisher. Bugzilla 1262.
1373 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1376 JH/09 Add $headers_added variable, with content from use of ACL modifier
1377 add_header (but not yet added to the message). Bugzilla 199.
1379 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1380 Pulled from Bugzilla 817 by Wolfgang Breyha.
1382 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1384 (nb: this is the same fix as in Exim 4.80.1)
1386 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1389 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1392 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1394 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1395 advertise SMTP AUTH mechanism to us, instead of a generic
1396 protocol violation error. Also, make Exim more robust to bad
1397 data from the Dovecot auth socket.
1399 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1401 When a queue runner is handling a message, Exim first routes the
1402 recipient addresses, during which it prunes them based on the retry
1403 hints database. After that it attempts to deliver the message to
1404 any remaining recipients. It then updates the hints database using
1407 So if a recipient address works intermittently, it can get repeatedly
1408 deferred at routing time. The retry hints record remains fresh so the
1409 address never reaches the final cutoff time.
1411 This is a fairly common occurrence when a user is bumping up against
1412 their storage quota. Exim had some logic in its local delivery code
1413 to deal with this. However it did not apply to per-recipient defers
1414 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1416 This change adds a proper retry rule check during routing so that the
1417 final cutoff time is checked against the message's age. We only do
1418 this check if there is an address retry record and there is not a
1419 domain retry record; this implies that previous attempts to handle
1420 the address had the retry_use_local_parts option turned on. We use
1421 this as an approximation for the destination being like a local
1422 delivery, as in LMTP.
1424 I suspect this new check makes the old local delivery cutoff check
1425 redundant, but I have not verified this so I left the code in place.
1427 TF/02 Correct gecos expansion when From: is a prefix of the username.
1429 Test 0254 submits a message to Exim with the header
1433 When I ran the test suite under the user fanf2, Exim expanded
1434 the header to contain my full name, whereas it should have added
1435 a Resent-Sender: header. It erroneously treats any prefix of the
1436 username as equal to the username.
1438 This change corrects that bug.
1440 GF/01 DCC debug and logging tidyup
1441 Error conditions log to paniclog rather than rejectlog.
1442 Debug lines prefixed by "DCC: " to remove any ambiguity.
1444 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1446 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1447 Bug spotted by Jeremy Harris; was flawed since initial commit.
1448 Would have resulted in OCSP responses post-SNI triggering an Exim
1449 NULL dereference and crash.
1451 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1453 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1454 Bug detection, analysis and fix by Samuel Thibault.
1455 Bugzilla 1331, Debian bug #698092.
1457 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1459 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1460 Server implementation by Todd Lyons, client by JH.
1461 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1462 config variable "prdr_enable" controls whether the server
1463 advertises the facility. If the client requests PRDR a new
1464 acl_data_smtp_prdr ACL is called once for each recipient, after
1465 the body content is received and before the acl_smtp_data ACL.
1466 The client is controlled by both of: a hosts_try_prdr option
1467 on the smtp transport, and the server advertisement.
1468 Default client logging of deliveries and rejections involving
1469 PRDR are flagged with the string "PRDR".
1471 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1472 fclose(). Diagnosis by Todd Lyons.
1474 PP/17 Update configure.default to handle IPv6 localhost better.
1475 Patch by Alain Williams (plus minor tweaks).
1478 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1479 This is now consistent with GnuTLS, and is now documented: the
1480 previous undocumented portable approach to treating the option as
1481 unset was to force an expansion failure. That still works, and
1482 an empty string is now equivalent.
1484 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1485 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1486 not performing validation itself.
1488 PP/20 Added force_command boolean option to pipe transport.
1489 Patch from Nick Koston, of cPanel Inc.
1491 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1494 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1496 PP/21 Fix eximon continuous updating with timestamped log-files.
1497 Broken in a format-string cleanup in 4.80, missed when I repaired the
1498 other false fix of the same issue.
1499 Report and fix from Heiko Schlichting.
1502 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1503 Report from Prashanth Katuri.
1505 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1506 It's SecureTransport, so affects any MacOS clients which use the
1507 system-integrated TLS libraries, including email clients.
1509 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1510 using a MIME ACL for non-SMTP local injection.
1511 Report and assistance in diagnosis by Warren Baker.
1513 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1515 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1517 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1518 last id that failed so it may be referenced in subsequent ACL's.
1520 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1523 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1524 ldap library initialization, allowing self-signed CA's to be
1525 used. Also properly sets require_cert option later in code by
1526 using NULL (global ldap config) instead of ldap handle (per
1527 session). Bug diagnosis and testing by alxgomz.
1529 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1530 the src/util/ subdirectory.
1532 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1533 renamed to Transport Post Delivery Action by Jeremy Harris, as
1536 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1537 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1538 redis_servers = needs to be configured which will be used by the redis
1539 lookup. Patch from Warren Baker, of The Packet Hub.
1541 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1543 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1544 hostname or reverse DNS when processing a host list. Used suggestions
1545 from multiple comments on this bug.
1547 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1549 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1550 Missed a few lines, added it to make the runtest require no keyboard
1553 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1554 contains upper case chars. Make router use caseful_local_part.
1556 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1557 support when GnuTLS has been built with p11-kit.
1563 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1565 This, or similar/improved, will also be change PP/11 of 4.82.
1571 PP/01 Handle short writes when writing local log-files.
1572 In practice, only affects FreeBSD (8 onwards).
1573 Bugzilla 1053, with thanks to Dmitry Isaikin.
1575 NM/01 Bugzilla 949 - Documentation tweak
1577 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1580 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1582 PP/02 Implemented gsasl authenticator.
1584 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1586 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1587 `pkg-config foo` for cflags/libs.
1589 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1590 with rest of GSASL and with heimdal_gssapi.
1592 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1593 `pkg-config foo` for cflags/libs for the TLS implementation.
1595 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1596 properties get this fed in as external SSF. A number of robustness
1597 and debugging improvements to the cyrus_sasl authenticator.
1599 PP/08 cyrus_sasl server now expands the server_realm option.
1601 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1602 Patch by Jeremy Harris.
1604 PP/10 Added dbmjz lookup type.
1606 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1608 PP/12 MAIL args handles TAB as well as SP, for better interop with
1609 non-compliant senders.
1610 Analysis and variant patch by Todd Lyons.
1612 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1613 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1614 Patch from Dirk Mueller <dmueller@suse.com>
1616 PP/13 tls_peerdn now print-escaped for spool files.
1617 Observed some $tls_peerdn in wild which contained \n, which resulted
1618 in spool file corruption.
1620 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1621 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1622 or write after TLS renegotiation, which otherwise led to messages
1625 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1626 as a tracking header (ie: a signed header comes before the signature).
1627 Patch from Wolfgang Breyha.
1629 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1630 comma-sep list; embedded commas doubled.
1632 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1634 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1636 Report and patch from Dmitry Banschikov.
1638 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1639 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1640 failures. We appear to now support TLS1.1+ with Exim.
1642 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1643 lets Exim select keys and certificates based upon TLS SNI from client.
1644 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1645 before an outbound SMTP session. New log_selector, +tls_sni.
1647 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1648 NULL dereference. Report and patch from Alun Jones.
1650 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1651 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1652 Not seeing resolver debug output on NetBSD, but suspect this is a
1653 resolver implementation change.
1655 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1656 Left warnings. Added "eximon gdb" invocation mode.
1658 PP/21 Defaulting "accept_8bitmime" to true, not false.
1660 PP/22 Added -bw for inetd wait mode support.
1662 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1663 locate the relevant includes and libraries. Made this the default.
1665 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1666 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1668 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1669 This may cause build issues on older platforms.
1671 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1672 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1673 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1674 Added SNI support via GnuTLS too.
1675 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1677 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1679 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1680 Applied second patch from Janne, implementing suggestion to default
1681 multiple-strings-in-record handling to match SPF spec.
1683 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1685 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1686 read-only, out of scope).
1687 Patch from Wolfgang Breyha, report from Stuart Northfield.
1689 PP/29 Fix three issues highlighted by clang analyser static analysis.
1690 Only crash-plausible issue would require the Cambridge-specific
1691 iplookup router and a misconfiguration.
1692 Report from Marcin Mirosław.
1694 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1696 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1697 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1698 As part of this, removing so much warning spew let me fix some minor
1699 real issues in debug logging.
1701 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1702 assignment on my part. Fixed.
1704 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1705 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1706 Janne Snabb (who went above and beyond: thank you).
1708 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1709 string otherwise requires a connection and a bunch more work and it's
1710 relatively easy to get wrong. Should also expose TLS library linkage
1713 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1714 64-bit ${eval} (JH/03).
1716 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1717 GNU libc to support some of the 64-bit stuff, should not lead to
1718 conflicts. Defined before os.h is pulled in, so if a given platform
1719 needs to override this, it can.
1721 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1722 protection layer was required, which is not implemented.
1723 Bugzilla 1254, patch from Wolfgang Breyha.
1725 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1726 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1727 tls_dhparam take prime identifiers. Also unbreak combination of
1728 OpenSSL+DH_params+TLSSNI.
1730 PP/39 Disable SSLv2 by default in OpenSSL support.
1736 PP/01 Solaris build fix for Oracle's LDAP libraries.
1737 Bugzilla 1109, patch from Stephen Usher.
1739 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1741 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1744 TF/02 Fix a couple more cases where we did not log the error message
1745 when unlink() failed. See also change 4.74-TF/03.
1747 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1748 lock up or crash if it happened to be inside a call to libc when it
1749 got a SIGUSR1 from exiwhat.
1751 The SIGUSR1 handler appends the current process status to the process
1752 log which is later printed by exiwhat. It used to use the general
1753 purpose logging code to do this, but several functions it calls are
1754 not safe for signals.
1756 The new output code in the SIGUSR1 handler is specific to the process
1757 log, and simple enough that it's easy to inspect for signal safety.
1758 Removing some special cases also simplifies the general logging code.
1759 Removing the spurious timestamps from the process log simplifies
1762 TF/04 Improved ratelimit ACL condition.
1764 The /noupdate option has been deprecated in favour of /readonly which
1765 has clearer semantics. The /leaky, /strict, and /readonly update modes
1766 are mutually exclusive. The update mode is no longer included in the
1767 database key; it just determines when the database is updated. (This
1768 means that when you upgrade Exim will forget old rate measurements.)
1770 Exim now checks that the per_* options are used with an update mode that
1771 makes sense for the current ACL. For example, when Exim is processing a
1772 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1773 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1774 must specify per_mail/readonly. If you omit the update mode it defaults to
1775 /leaky where that makes sense (as before) or /readonly where required.
1777 The /noupdate option is now undocumented but still supported for
1778 backwards compatibility. It is equivalent to /readonly except that in
1779 ACLs where /readonly is required you may specify /leaky/noupdate or
1780 /strict/noupdate which are treated the same as /readonly.
1782 A useful new feature is the /count= option. This is a generalization
1783 of the per_byte option, so that you can measure the throughput of other
1784 aggregate values. For example, the per_byte option is now equivalent
1785 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1787 The per_rcpt option has been generalized using the /count= mechanism
1788 (though it's more complicated than the per_byte equivalence). When it is
1789 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1790 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1791 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1792 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1793 Note that using per_rcpt with a non-readonly update mode in more than
1794 one ACL will cause the recipients to be double-counted. (The per_mail
1795 and per_byte options don't have this problem.)
1797 The handling of very low rates has changed slightly. If the computed rate
1798 is less than the event's count (usually one) then this event is the first
1799 after a long gap. In this case the rate is set to the same as this event's
1800 count, so that the first message of a spam run is counted properly.
1802 The major new feature is a mechanism for counting the rate of unique
1803 events. The new per_addr option counts the number of different
1804 recipients that someone has sent messages to in the last time period. It
1805 behaves like per_rcpt if all the recipient addresses are different, but
1806 duplicate recipient addresses do not increase the measured rate. Like
1807 the /count= option this is a general mechanism, so the per_addr option
1808 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1809 example, measure the rate that a client uses different sender addresses
1810 with the options per_mail/unique=$sender_address. There are further
1811 details in the main documentation.
1813 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1815 TF/06 Removed a few PCRE remnants.
1817 TF/07 Automatically extract Exim's version number from tags in the git
1818 repository when doing development or release builds.
1820 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1821 Bugzilla 879. Patch from Paul Fisher.
1823 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1824 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1827 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1829 PP/05 Variable $av_failed, true if the AV scanner deferred.
1830 Bugzilla 1078. Patch from John Horne.
1832 PP/06 Stop make process more reliably on build failure.
1833 Bugzilla 1087. Patch from Heiko Schlittermann.
1835 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1836 Bugzilla 1089. Patch from Heiko Schlittermann.
1838 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1839 Bugzilla 1131. Patch from Holger Weiß.
1841 PP/09 Handle IPv6 addresses with SPF.
1842 Bugzilla 860. Patch from Wolfgang Breyha.
1844 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1846 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1849 PP/11 match_* no longer expand right-hand-side by default.
1850 New compile-time build option, EXPAND_LISTMATCH_RHS.
1851 New expansion conditions, "inlist", "inlisti".
1853 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1855 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1857 PP/14 fix log_write() format string regression from TF/03.
1858 Bugzilla 1152. Patch from Dmitry Isaikin.
1864 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1866 PP/02 Harmonised TLS library version reporting; only show if debugging.
1867 Layout now matches that introduced for other libraries in 4.74 PP/03.
1869 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1871 PP/04 New "dns_use_edns0" global option.
1873 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1876 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1877 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1879 TK/01 Updated PolarSSL code to 0.14.2.
1880 Bugzilla 1097. Patch from Andreas Metzler.
1882 PP/07 Catch divide-by-zero in ${eval:...}.
1883 Fixes bugzilla 1102.
1885 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1888 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1889 format-string attack -- SECURITY: remote arbitrary code execution.
1891 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1892 time unintentionally subject to list matching rules, letting the header
1893 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1894 arbitrary string expansion). This allowed for information disclosure.
1896 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1897 INT_MIN/-1 -- value coerced to INT_MAX.
1903 NM/01 Workaround for PCRE version dependency in version reporting
1906 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1907 This fixes portability to compilers other than gcc, notably
1908 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1910 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1911 makefiles for portability to HP-UX and POSIX correctness.
1913 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1914 Also via indented variable definition in the Makefile.
1915 (Debugging by Oliver Heesakkers).
1917 PP/02 Restore caching of spamd results with expanded spamd_address.
1918 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1920 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1921 Improves build reliability. Fix from: Frank Elsner
1923 NM/02 Fix wide character breakage in the rfc2047 coding
1924 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1926 NM/03 Allow underscore in dnslist lookups
1927 Fixes bug 1026. Patch from Graeme Fowler
1929 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1930 Code patches from Adam Ciarcinski of NetBSD.
1932 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1935 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1936 is logged, to avoid truncation. Patch from John Horne.
1938 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1939 Patch from Jakob Hirsch.
1941 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1942 SQL string expansion failure details.
1943 Patch from Andrey Oktyabrski.
1945 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1946 Patch from Simon Arlott.
1948 PP/09 New lookups functionality failed to compile on old gcc which rejects
1949 extern declarations in function scope.
1950 Patch from Oliver Fleischmann
1952 PP/10 Use sig_atomic_t for flags set from signal handlers.
1953 Check getgroups() return and improve debugging.
1954 Fixed developed for diagnosis in bug 927 (which turned out to be
1957 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1958 Patch from Mark Zealey.
1960 PP/12 Bugzilla 1056: Improved spamd server selection.
1961 Patch from Mark Zealey.
1963 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1964 Based on patch from Heiko Schlittermann.
1966 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1967 Patch from Uwe Doering, sign-off by Michael Haardt.
1969 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1970 variable declaration deep within a block. Bug and patch from
1973 PP/15 lookups-Makefile IRIX compatibility coercion.
1975 PP/16 Make DISABLE_DKIM build knob functional.
1977 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1978 Patch by Simon Arlott
1980 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1981 variable argument macros. Our copy now differs from upstream.
1987 TF/01 Failure to get a lock on a hints database can have serious
1988 consequences so log it to the panic log.
1990 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1991 controlled using the smtp_confirmation log selector.
1993 TF/03 Include the error message when we fail to unlink a spool file.
1995 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1996 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1997 for maintaining out-of-tree patches for some time.
1999 PP/01 Bugzilla 139: Documentation and portability issues.
2000 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2001 Handle per-OS dynamic-module compilation flags.
2003 PP/02 Let /dev/null have normal permissions.
2004 The 4.73 fixes were a little too stringent and complained about the
2005 permissions on /dev/null. Exempt it from some checks.
2006 Reported by Andreas M. Kirchwitz.
2008 PP/03 Report version information for many libraries, including
2009 Exim version information for dynamically loaded libraries. Created
2010 version.h, now support a version extension string for distributors
2011 who patch heavily. Dynamic module ABI change.
2013 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2014 privilege escalation vulnerability whereby the Exim run-time user
2015 can cause root to append content of the attacker's choosing to
2018 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2021 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2022 If dropping privileges for untrusted macros, we disabled normal logging
2023 on the basis that it would fail; for the Exim run-time user, this is not
2024 the case, and it resulted in successful deliveries going unlogged.
2025 Fixed. Reported by Andreas Metzler.
2031 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2032 only prepend for the Resent-* case. Fixes regression introduced in
2033 Exim 4.70 by NM/22 for Bugzilla 607.
2035 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2036 increasing numbers of administrators be bitten by this.
2038 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2040 PP/03 Bugzilla 994: added openssl_options main configuration option.
2042 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2044 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2046 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2048 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2049 without a peer certificate, leading to a segfault because of an
2050 assumption that peers always have certificates. Be a little more
2051 paranoid. Problem reported by Martin Tscholak.
2053 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2054 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2055 NB: ClamAV planning to remove STREAM in "middle of 2010".
2056 CL also introduces -bmalware, various -d+acl logging additions and
2057 more caution in buffer sizes.
2059 PP/09 Implemented reverse_ip expansion operator.
2061 PP/10 Bugzilla 937: provide a "debug" ACL control.
2063 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2065 PP/12 Bugzilla 973: Implement --version.
2067 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2069 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2071 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2073 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2074 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2075 ignore trailing whitespace.
2077 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2079 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2082 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2083 Notification from Dr Andrew Aitchison.
2085 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2086 ExtendedDetectionInfo response format.
2087 Notification from John Horne.
2089 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2092 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2093 XSL and documented dependency on system catalogs, with examples of how
2096 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2099 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2100 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2101 configuration file which is writeable by the Exim user or group.
2103 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2104 of configuration files to cover files specified with the -C option if
2105 they are going to be used with root privileges, not just the default
2108 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2109 option (effectively making it always true).
2111 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2112 files to be used while preserving root privileges.
2114 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2115 that rogue child processes cannot use them.
2117 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2118 run-time user, instead of root.
2120 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2121 Exim run-time user without dropping privileges.
2123 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2124 result string, instead of calling string_vformat() twice with the same
2127 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2128 for other users. Others should always drop root privileges if they use
2129 -C on the command line, even for a whitelisted configure file.
2131 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2133 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2139 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2140 $data_path, and $header_path variables; fixed documentation bugs and
2143 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2144 exipick to access non-standard spools, including the "frozen" queue
2147 NM/01 Bugzilla 965: Support mysql stored procedures.
2148 Patch from Alain Williams
2150 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2152 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2153 Patch from Andreas Metzler
2155 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2156 Patch from Kirill Miazine
2158 NM/05 Bugzilla 671: Added umask to procmail example.
2160 JJ/03 installed exipick 20100323.0, fixing doc bug
2162 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2163 directory. Notification and patch from Dan Rosenberg.
2165 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2167 TK/02 Improve log output when DKIM signing operation fails.
2169 MH/01 Treat the transport option dkim_domain as a colon separated
2170 list, not as a single string, and sign the message with each element,
2171 omitting multiple occurences of the same signer.
2173 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2174 Bugzilla 985, 986. Patch by Simon Arlott
2176 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2177 Patch by Simon Arlott
2179 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2180 MBX locking. Notification from Dan Rosenberg.
2186 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2188 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2190 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2192 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2194 NM/04 Bugzilla 915: Flag broken perl installation during build.
2200 TK/01 Added patch by Johannes Berg that expands the main option
2201 "spamd_address" if it starts with a dollar sign.
2203 TK/02 Write list of recipients to X-Envelope-Sender header when building
2204 the mbox-format spool file for content scanning (suggested by Jakob
2207 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2208 (http://www.dcc-servers.net/) support via dccifd. Activated by
2209 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2211 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2212 by Mark Daniel Reidel <mr@df.eu>.
2214 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2215 When building exim an external PCRE library is now needed -
2216 PCRE is a system library on the majority of modern systems.
2217 See entry on PCRE_LIBS in EDITME file.
2219 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2220 conversation. Added nologin parameter to request.
2221 Patch contributed by Kirill Miazine.
2223 TF/01 Do not log submission mode rewrites if they do not change the address.
2225 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2227 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2228 log files in place. Contributed by Roberto Lima.
2230 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2232 TF/03 Bugzilla 615: When checking the local_parts router precondition
2233 after a local_part_suffix or local_part_prefix option, Exim now
2234 does not use the address's named list lookup cache, since this
2235 contains cached lookups for the whole local part.
2237 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2238 Robert Millan. Documentation is in experimental-spec.txt.
2240 TF/04 Bugzilla 668: Fix parallel build (make -j).
2242 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2244 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2245 Patch provided by Jan Srzednicki.
2247 TF/05 Leading white space used to be stripped from $spam_report which
2248 wrecked the formatting. Now it is preserved.
2250 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2251 that they are available at delivery time.
2253 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2255 TF/08 TLS error reporting now respects the incoming_interface and
2256 incoming_port log selectors.
2258 TF/09 Produce a more useful error message if an SMTP transport's hosts
2259 setting expands to an empty string.
2261 NM/06 Bugzilla 744: EXPN did not work under TLS.
2262 Patch provided by Phil Pennock.
2264 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2265 Patch provided by Richard Godbee.
2267 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2268 acl_smtp_notquit, added index entry.
2270 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2271 Patch provided by Eugene Bujak.
2273 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2274 accept(). Patch provided by Maxim Dounin.
2276 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2277 Patch provided by Phil Pennock.
2279 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2281 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2282 Patch provided by Brad "anomie" Jorsch.
2284 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2285 Patch provided by Dean Brooks.
2287 TK/05 Add native DKIM support (does not depend on external libraries).
2289 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2290 Patch provided by Graeme Fowler.
2292 NM/16 Bugzilla 851: Documentation example syntax fix.
2294 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2296 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2299 NM/19 Bugzilla 745: TLS version reporting.
2300 Patch provided by Phil Pennock.
2302 NM/20 Bugzilla 167: bool: condition support.
2303 Patch provided by Phil Pennock.
2305 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2306 clients. Patch provided by Phil Pennock.
2308 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2309 Patch provided by Brad "anomie" Jorsch.
2311 NM/23 Bugzilla 687: Fix misparses in eximstats.
2312 Patch provided by Heiko Schlittermann.
2314 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2315 Patch provided by Heiko Schlittermann.
2317 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2318 plus update to original patch.
2320 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2322 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2323 Patch provided by David Brownlee.
2325 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2327 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2329 NM/30 Bugzilla 888: TLS documentation bugfixes.
2331 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2333 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2334 Unlike the original bugzilla I have changed all shell scripts in src tree.
2336 NM/33 Bugzilla 898: Transport filter timeout fix.
2337 Patch by Todd Rinaldo.
2339 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2340 Patch by Serge Demonchaux.
2342 NM/35 Bugzilla 39: Base64 decode bug fixes.
2343 Patch by Jakob Hirsch.
2345 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2347 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2349 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2351 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2357 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2358 ALT-N's libdkim that I have put here:
2359 http://duncanthrax.net/exim-experimental/
2361 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2362 were called 'true' and it seems that C99 defines that as a reserved
2363 keyword to be used with 'bool' variable types. That means you could
2364 not include C99-style headers which use bools without triggering
2365 build errors in sieve.c.
2367 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2368 as mailq or other aliases. Changed the --help handling significantly
2369 to do whats expected. exim_usage() emits usage/help information.
2371 SC/01 Added the -bylocaldomain option to eximstats.
2373 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2375 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2377 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2383 PH/01 Another patch from the Sieve maintainer.
2385 PH/02 When an IPv6 address is converted to a string for single-key lookup
2386 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2387 dots are used instead of colons so that keys in lsearch files need not
2388 contain colons. This was done some time before quoting was made available
2389 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2390 (notated using the quote facility) so as to distinguish them from IPv4
2391 keys. This meant that lookups for IP addresses in host lists did not work
2392 for iplsearch lookups.
2394 This has been fixed by arranging for IPv6 addresses to be expressed with
2395 colons if the lookup type is iplsearch. This is not incompatible, because
2396 previously such lookups could never work.
2398 The situation is now rather anomalous, since one *can* have colons in
2399 ordinary lsearch keys. However, making the change in all cases is
2400 incompatible and would probably break a number of configurations.
2402 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2405 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2406 conversion specification without a maximum field width, thereby enabling
2407 a rogue spamd server to cause a buffer overflow. While nobody in their
2408 right mind would setup Exim to query an untrusted spamd server, an
2409 attacker that gains access to a server running spamd could potentially
2410 exploit this vulnerability to run arbitrary code as the Exim user.
2412 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2413 $primary_hostname instead of what libspf2 thinks the hosts name is.
2415 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2416 a directory entry by the name of the lookup key. Previously, if a
2417 symlink pointed to a non-existing file or a file in a directory that
2418 Exim lacked permissions to read, a lookup for a key matching that
2419 symlink would fail. Now it is enough that a matching directory entry
2420 exists, symlink or not. (Bugzilla 503.)
2422 PH/03 The body_linecount and body_zerocount variables are now exported in the
2425 PH/04 Added the $dnslist_matched variable.
2427 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2428 This means they are set thereafter only if the connection becomes
2431 PH/06 Added the client_condition to authenticators so that some can be skipped
2432 by clients under certain conditions.
2434 PH/07 The error message for a badly-placed control=no_multiline_responses left
2435 "_responses" off the end of the name.
2437 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2439 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2440 (without spaces) instead of just copying the configuration text.
2442 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2444 PH/11 Added $max_received_linelength.
2446 PH/12 Added +ignore_defer and +include_defer to host lists.
2448 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2449 way in which PCRE > 7.0 is built.
2451 PH/14 Implemented queue_only_load_latch.
2453 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2454 MAIL command. The effect was to mangle the value on 64-bit systems.
2456 PH/16 Another patch from the Sieve maintainer.
2458 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2460 PH/18 If a system quota error occurred while trying to create the file for
2461 a maildir delivery, the message "Mailbox is full" was not appended to the
2462 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2463 only to a quota excession during the actual writing of the file.
2465 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2466 characters?) which causes problems in log lines. The DN values are now
2467 passed through string_printing() before being added to log lines.
2469 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2470 and InterBase are left for another time.)
2472 PH/21 Added message_body_newlines option.
2474 PH/22 Guard against possible overflow in moan_check_errorcopy().
2476 PH/23 POSIX allows open() to be a macro; guard against that.
2478 PH/24 If the recipient of an error message contained an @ in the local part
2479 (suitably quoted, of course), incorrect values were put in $domain and
2480 $local_part during the evaluation of errors_copy.
2486 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2487 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2490 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2491 issue a MAIL command.
2493 PH/02 In an ACL statement such as
2495 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2497 if a client was not listed at all, or was listed with a value other than
2498 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2499 the condition was not true (as it should be), so access was not denied.
2500 The bug was that the ! inversion was incorrectly passed on to the second
2501 item. This has been fixed.
2503 PH/03 Added additional dnslists conditions == and =& which are different from
2504 = and & when the dns lookup returns more than one IP address.
2506 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2507 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2509 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2510 FSYNC, which compiles an option called disable_fsync that allows for
2511 bypassing fsync(). The documentation is heavily laced with warnings.
2513 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2515 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2516 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2517 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2518 including adding "make clean"; (3) Added -fPIC when compiling the test
2519 dynamically loaded module, to get rid of a warning.
2521 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2522 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2523 = 0s. The bug is otherwise harmless.
2525 PH/07 There was a bug in the dovecot authenticator such that the value of
2526 $auth1 could be overwritten, and so not correctly preserved, after a
2527 successful authentication. This usually meant that the value preserved by
2528 the server_setid option was incorrect.
2530 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2532 PH/09 Installed PCRE release 7.0.
2534 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2535 run for batched SMTP input. It is now run at the start of every message
2536 in the batch. While fixing this I discovered that the process information
2537 (output by running exiwhat) was not always getting set for -bs and -bS
2538 input. This is fixed, and it now also says "batched" for BSMTP.
2540 PH/11 Added control=no_pipelining.
2542 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2543 patch, slightly modified), and move the expansion of helo_data till after
2544 the connection is made in the smtp transport (so it can use these
2547 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2549 PH/14 Added log_selector = +pid.
2551 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2553 PH/16 Add ${if forany and ${if forall.
2555 PH/17 Added dsn_from option to vary the From: line in DSNs.
2557 PH/18 Flush SMTP output before performing a callout, unless control =
2558 no_callout_flush is set.
2560 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2561 was true (the default) a successful delivery failed to delete the retry
2562 item, thus causing premature timeout of the address. The bug is now
2565 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2567 PH/21 Long custom messages for fakedefer and fakereject are now split up
2568 into multiline responses in the same way that messages for "deny" and
2569 other ACL rejections are.
2571 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2572 with slight modification.
2574 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2575 draft, changing the syntax and factoring some duplicate code".
2577 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2578 for deliveries of the second and subsequent messages over the same SMTP
2581 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2582 ${reduce, with only minor "tidies".
2584 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2586 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2587 expansion side effects.
2589 PH/27 When a message times out after an over-quota error from an Exim-imposed
2590 quota, the bounce message says "mailbox is full". This message was not
2591 being given when it was a system quota that was exceeded. It now should
2594 MH/03 Made $recipients available in local_scan(). local_scan() already has
2595 better access to the recipient list through recipients_list[], but
2596 $recipients can be useful in postmaster-provided expansion strings.
2598 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2599 in the case of a MAIL command with additional options following the
2600 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2601 were accidentally chopped off.
2603 PH/29 SMTP synchronization checks are implemented when a command is read -
2604 there is a check that no more input is waiting when there shouldn't be
2605 any. However, for some commands, a delay in an ACL can mean that it is
2606 some time before the response is written. In this time, more input might
2607 arrive, invalidly. So now there are extra checks after an ACL has run for
2608 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2609 pipelining has not been advertised.
2611 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2613 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2614 returned in the SMTP response when smtp_return_error_details was false.
2615 This has been fixed.
2617 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2618 instead of the C I/O that was originally supplied, because problems were
2619 reported on Solaris.
2621 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2622 Exim which did not show up earlier: it was assuming that a call to
2623 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2624 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2625 was a macro that became an assignment, so it seemed to work. This has
2626 changed to a proper function call with a void return, hence the compile
2627 error. Exim's code has been fixed.
2629 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2632 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2634 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2636 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2637 because it turns out to be too big or there is a timeout) there is no
2638 "Completed" line in the log. When some messages of this type were
2639 selected by exigrep, they were listed as "not completed". Others were
2640 picked up by some special patterns. I have improved the selection
2641 criteria to be more general.
2643 PH/38 The host_find_failed option in the manualroute router can now be set
2644 to "ignore", to completely ignore a host whose IP address cannot be
2645 found. If all hosts are ignored, the behaviour is controlled by the new
2646 host_all_ignored option.
2648 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2649 homing or because of multiple MX records with /mx) generated more than
2650 one IP address, and the following item turned out to be the local host,
2651 all the secondary addresses of the first item were incorrectly removed
2652 from the list, along with the local host and any following hosts (which
2653 is what is supposed to happen).
2655 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2656 whoever called Exim into the -H file. In the case of the daemon it was
2657 behaving confusingly. When first started, it used values for whoever
2658 started the daemon, but after a SIGHUP it used the Exim user (because it
2659 calls itself on a restart). I have changed the code so that it now always
2662 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2663 message are rejected with the same error (e.g. no authentication or bad
2664 sender address), and a DATA command is nevertheless sent (as can happen
2665 with PIPELINING or a stupid MUA), the error message that was given to the
2666 RCPT commands is included in the rejection of the DATA command. This is
2667 intended to be helpful for MUAs that show only the final error to their
2670 PH/42 Another patch from the Sieve maintainer.
2672 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2673 Eximstats - Fixed some broken HTML links and added missing column headers
2675 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2676 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2678 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2680 PH/43 Yet another patch from the Sieve maintainer.
2682 PH/44 I found a way to check for a TCP/IP connection going away before sending
2683 the response to the final '.' that terminates a message, but only in the
2684 case where the client has not sent further data following the '.'
2685 (unfortunately, this is allowed). However, in many cases there won't be
2686 any further data because there won't be any more messages to send. A call
2687 to select() can be used: if it shows that the input is "ready", there is
2688 either input waiting, or the socket has been closed. An attempt to read
2689 the next input character can distinguish the two cases. Previously, Exim
2690 would have sent an OK response which the client would never have see.
2691 This could lead to message repetition. This fix should cure that, at
2692 least in a lot of common cases.
2694 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2695 advertised in response to EHLO.
2701 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2702 fixed by 4.65/MH/01 (is this a record?) are fixed:
2704 (i) An empty string was always treated as zero by the numeric comparison
2705 operators. This behaviour has been restored.
2707 (ii) It is documented that the numeric comparison operators always treat
2708 their arguments as decimal numbers. This was broken in that numbers
2709 starting with 0 were being interpreted as octal.
2711 While fixing these problems I realized that there was another issue that
2712 hadn't been noticed. Values of message_size_limit (both the global option
2713 and the transport option) were treated as octal if they started with 0.
2714 The documentation was vague. These values are now always treated as
2715 decimal, and I will make that clear in the documentation.
2721 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2722 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2725 MH/01 Don't check that the operands of numeric comparison operators are
2726 integers when their expansion is in "skipping" mode (fixes bug
2727 introduced by 4.64-PH/07).
2729 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2730 child addresses, Exim now panics and dies. Previously, because the count
2731 is held in a short int, deliveries were likely to be lost. As such a
2732 large number of recipients for a single message is ridiculous
2733 (performance will be very, very poor), I have chosen to impose a limit
2734 rather than extend the field.
2740 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2741 leftover -K file (the existence of which was triggered by #402).
2742 While we were at it, introduced process PID as part of the -K
2743 filename. This should rule out race conditions when creating
2746 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2747 processing considerably. Previous code took too long for large mails,
2748 triggering a timeout which in turn triggers #401.
2750 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2751 in the DK code in transports.c. sendfile() is not really portable,
2752 hence the _LINUX specificness.
2754 TF/01 In the add_headers option to the mail command in an Exim filter,
2755 there was a bug that Exim would claim a syntax error in any
2756 header after the first one which had an odd number of characters
2759 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2760 callout verification, Exim cached a "reject" for the entire domain. This
2761 is correct for most verifications, but it is not correct for a recipient
2762 verification with use_sender or use_postmaster set, because in that case
2763 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2764 case of MAIL FROM:<> rejection from other early rejections (e.g.
2765 rejection of HELO). When verifying a recipient using a non-null MAIL
2766 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2767 Whatever the result of the callout, the value of the domain cache is
2768 left unchanged (for any other kind of callout, getting as far as trying
2769 RCPT means that the domain itself is ok).
2771 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2774 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2775 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2776 session, the daemon ignores ECONNECT errors and logs others; it now
2777 ignores EPIPE as well.
2779 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2780 (quoted-printable decoding).
2782 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2783 later the small subsequent patch to fix an introduced bug.
2785 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2787 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2789 PH/08 An error is now given if message_size_limit is specified negative.
2791 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2792 to be given (somewhat) arbitrary names.
2794 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2797 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2798 miscellaneous code fixes
2800 PH/10 Added the log_reject_target ACL modifier to specify where to log
2803 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2804 hostname. This is wrong, because it relates to the incoming message (and
2805 probably the interface on which it is arriving) and not to the outgoing
2806 callout (which could be using a different interface). This has been
2807 changed to use the value of the helo_data option from the smtp transport
2808 instead - this is what is used when a message is actually being sent. If
2809 there is no remote transport (possible with a router that sets up host
2810 addresses), $smtp_active_hostname is used.
2812 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2813 tweaks were necessary in order to get it to work (see also 21 below):
2814 (a) The code assumed that strncpy() returns a negative number on buffer
2815 overflow, which isn't the case. Replaced with Exim's string_format()
2817 (b) There were several signed/unsigned issues. I just did the minimum
2818 hacking in of casts. There is scope for a larger refactoring.
2819 (c) The code used strcasecmp() which is not a standard C function.
2820 Replaced with Exim's strcmpic() function.
2821 (d) The code set only $1; it now sets $auth1 as well.
2822 (e) A simple test gave the error "authentication client didn't specify
2823 service in request". It would seem that Dovecot has changed its
2824 interface. Fortunately there's a specification; I followed it and
2825 changed what the client sends and it appears to be working now.
2827 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2830 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2831 address A is aliased to B and C, where B exists and C does not. Without
2832 -v the output is "A verified" because verification stops after a
2833 successful redirection if more than one address is generated. However,
2834 with -v the child addresses are also verified. Exim was outputting "A
2835 failed to verify" and then showing the successful verification for C,
2836 with its parentage. It now outputs "B failed to verify", showing B's
2837 parentage before showing the successful verification of C.
2839 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2840 look up a TXT record in a specific list after matching in a combined
2843 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2844 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2845 they consult the DNS. I had assumed they would set it the way they
2846 wanted; and indeed my experiments on Linux seem to show that in some
2847 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2848 To be on the safe side, however, I have now made the interface to
2849 host_find_byname() similar to host_find_bydns(), with an argument
2850 containing the DNS resolver options. The host_find_byname() function now
2851 sets these options at its start, just as host_find_bydns() does. The smtp
2852 transport options dns_qualify_single and dns_search_parents are passed to
2853 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2854 of host_find_byname() use the default settings of RES_DEFNAMES
2855 (qualify_single) but not RES_DNSRCH (search_parents).
2857 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2858 spool_read_header() do less string testing, by means of a preliminary
2859 switch on the second character of optional "-foo" lines. (This is
2860 overdue, caused by the large number of possibilities that now exist.
2861 Originally there were few.) While I was there, I also converted the
2862 str(n)cmp tests so they don't re-test the leading "-" and the first
2863 character, in the hope this might squeeze out yet more improvement.
2865 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2866 flag allowing group syntax was set by the header_syntax check but not
2867 turned off, possible causing trouble later; (2) The flag was not being
2868 set at all for the header_verify test, causing "group"-style headers to
2869 be rejected. I have now set it in this case, and also caused header_
2870 verify to ignore an empty address taken from a group. While doing this, I
2871 came across some other cases where the code for allowing group syntax
2872 while scanning a header line wasn't quite right (mostly, not resetting
2873 the flag correctly in the right place). These bugs could have caused
2874 trouble for malformed header lines. I hope it is now all correct.
2876 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2877 with the "reply" argument non-NULL. The code, however (which originally
2878 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2879 but it didn't always do it. This confused somebody who was copying the
2880 code for some other use. I have removed all the tests.
2882 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2883 feature that was used to support insecure browsers during the U.S. crypto
2884 embargo. It requires special client support, and Exim is probably the
2885 only MTA that supported it -- and would never use it because real RSA is
2886 always available. This code has been removed, because it had the bad
2887 effect of slowing Exim down by computing (never used) parameters for the
2888 RSA_EXPORT functionality.
2890 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2891 authenticator to fail if there's a tab character in the incoming data
2892 (there should never be unless someone is messing about, as it's supposed
2893 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2894 if the connection is using TLS or if the remote IP is the same as the
2895 local IP, and the "valid-client-cert option" if a client certificate has
2898 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2899 authenticators. This can be used for authorization after authentication
2900 succeeds. (In the case of plaintext, it servers for both authentication
2903 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2904 if any retry times were supplied.
2906 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2907 connection, where there is no client IP address to check. In this
2908 situation, the verify now always succeeds.
2910 PH/25 Applied John Jetmore's -Mset patch.
2912 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2914 PH/27 In a string expansion for a processed (not raw) header when multiple
2915 headers of the same name were present, leading whitespace was being
2916 removed from all of them, but trailing whitespace was being removed only
2917 from the last one. Now trailing whitespace is removed from each header
2918 before concatenation. Completely empty headers in a concatenation (as
2919 before) are ignored.
2921 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2922 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2924 PH/29 [Removed. This was a change that I later backed out, and forgot to
2925 correct the ChangeLog entry (that I had efficiently created) before
2926 committing the later change.]
2928 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2929 address errors (4xx response to RCPT) over the same connection as other
2930 messages routed to the same hosts. Such deliveries are always "forced",
2931 so retry times are not inspected. This resulted in far too many retries
2932 for the affected addresses. The effect occurred only when there were more
2933 hosts than the hosts_max_try setting in the smtp transport when it had
2934 the 4xx errors. Those hosts that it had tried were not added to the list
2935 of hosts for which the message was waiting, so if all were tried, there
2936 was no problem. Two fixes have been applied:
2938 (i) If there are any address or message errors in an SMTP delivery, none
2939 of the hosts (tried or untried) are now added to the list of hosts
2940 for which the message is waiting, so the message should not be a
2941 candidate for sending over the same connection that was used for a
2942 successful delivery of some other message. This seems entirely
2943 reasonable: after all the message is NOT "waiting for some host".
2944 This is so "obvious" that I'm not sure why it wasn't done
2945 previously. Hope I haven't missed anything, but it can't do any
2946 harm, as the worst effect is to miss an optimization.
2948 (ii) If, despite (i), such a delivery is accidentally attempted, the
2949 routing retry time is respected, so at least it doesn't keep
2950 hammering the server.
2952 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2953 in ${readsocket because some servers need this prod.
2955 PH/32 Added some extra debug output when updating a wait-xxx database.
2957 PH/33 The hint "could be header name not terminated by colon", which has been
2958 given for certain expansion errors for a long time, was not being given
2959 for the ${if def:h_colon_omitted{... case.
2961 PH/34 The spec says: "With one important exception, whenever a domain list is
2962 being scanned, $domain contains the subject domain." There was at least
2963 one case where this was not true.
2965 PH/35 The error "getsockname() failed: connection reset by peer" was being
2966 written to the panic log as well as the main log, but it isn't really
2967 panic-worthy as it just means the connection died rather early on. I have
2968 removed the panic log writing for the ECONNRESET error when getsockname()
2971 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2972 runs only) independently of the message's sender address. This meant
2973 that, if the 4xx error was in fact related to the sender, a different
2974 message to the same recipient with a different sender could confuse
2975 things. In particular, this can happen when sending to a greylisting
2976 server, but other circumstances could also provoke similar problems.
2977 I have changed the default so that the retry time for these errors is now
2978 based a combination of the sender and recipient addresses. This change
2979 can be overridden by setting address_retry_include_sender=false in the
2982 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2983 remote server are returned as part of bounce messages. This was not
2984 happening for LMTP over a pipe (the lmtp transport), but now it is the
2985 same for both kinds of LMTP.
2987 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2988 in header lines that were in fact CNAMEs. This is no longer the case.
2990 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2991 and queue runs started by the daemon processed all messages. This has
2992 been fixed so that -R and -S can now usefully be given with -q<time>.
2994 PH/40 Import PCRE release 6.7 (fixes some bugs).
2996 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2998 PH/42 Give an error if -q is specified more than once.
3000 PH/43 Renamed the variables $interface_address and $interface_port as
3001 $received_ip_address and $received_port, to make it clear that these
3002 values apply to message reception, and not to the outgoing interface when
3003 a message is delivered. (The old names remain recognized, of course.)
3005 PH/44 There was no timeout on the connect() call when using a Unix domain
3006 socket in the ${readsocket expansion. There now is.
3008 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3009 be meaningful with "accept".
3011 SC/01 Eximstats V1.43
3012 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3014 SC/02 Eximstats V1.44
3015 Use a glob alias rather than an array ref in the generated
3016 parser. This improves both readability and performance.
3018 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3019 Collect SpamAssassin and rejection statistics.
3020 Don't display local sender or destination tables unless
3021 there is data to show.
3022 Added average volumes into the top table text output.
3024 SC/04 Eximstats V1.46
3025 Collect data on the number of addresses (recipients)
3026 as well as the number of messages.
3028 SC/05 Eximstats V1.47
3029 Added 'Message too big' to the list of mail rejection
3030 reasons (thanks to Marco Gaiarin).
3032 SC/06 Eximstats V1.48
3033 Mainlog lines which have GMT offsets and are too short to
3034 have a flag are now skipped.
3036 SC/07 Eximstats V1.49 (Alain Williams)
3037 Added the -emptyok flag.
3039 SC/08 Eximstats V1.50
3040 Fixes for obtaining the IP address from reject messages.
3042 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3043 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3044 whitespace changes from 4.64-PH/27
3046 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3049 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3050 are found, allow negative numbers in numeric criteria)
3052 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3054 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3055 to match changes made in 4.64-PH/43
3057 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3059 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3060 "domain" is actually an IP address, and force a failure. This locks out
3061 those revolvers/nameservers that support "A-for-A" lookups, in
3062 contravention of the specifications.
3064 PH/48 When a host name was looked up from an IP address, and the subsequent
3065 forward lookup of the name timed out, the host name was left in
3066 $sender_host_name, contrary to the specification.
3068 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3069 restricted to single-key lookups, Exim was not diagnosing an error if
3070 * or *@ was used with a query-style lookup.
3072 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3074 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3075 long ago, but noone interested enough thought of it. Let's just say that
3076 the "1.1" means that there are some new functions that weren't there at
3077 some point in the past.
3079 PH/51 Error processing for expansion failure of helo_data from an smtp
3080 transport during callout processing was broken.
3082 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3083 tested/used via the -bh/-bhc/-bs options.
3085 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3086 bug, fixed in subsequent PCRE releases).
3088 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3089 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3091 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3097 SC/01 Use a glob alias rather than an array ref in eximstats generated
3098 parser. This improves both readability and performance.
3100 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3101 Don't display local sender or destination tables in eximstats unless
3102 there is data to show.
3103 Added average volumes into the eximstats top table text output.
3105 SC/03 Collect data on the number of addresses (recipients) as well
3106 as the number of messages in eximstats.
3108 TF/01 Correct an error in the documentation for the redirect router. Exim
3109 does (usually) call initgroups() when daemonizing.
3111 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3112 with consistent privilege compared to when running as a daemon.
3114 TF/03 Note in the spec that $authenticated_id is not set for local
3115 submissions from trusted users.
3117 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3118 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3120 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3121 by adding some example configuration directives to the default
3122 configuration file. A little bit of work is required to uncomment the
3123 directives and define how usernames and passwords are checked, but
3124 there is now a framework to start from.
3126 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3127 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3128 without this. I don't know how relevant this is to other LDAP libraries.
3130 PH/02 Add the verb name to the "unknown ACL verb" error.
3132 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3134 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3136 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3137 directory not expanded when it should be if an expanded home directory
3138 was set for the address (which is overridden by the transport).
3140 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3143 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3144 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3145 because it is too late at that time, and has no effect.
3147 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3148 security issue with \' (bugzilla #107). I could not use the
3149 PQescapeStringConn() function, because it needs a PGconn value as one of
3152 PH/08 When testing addresses using -bt, indicate those final addresses that
3153 are duplicates that would not cause an additional delivery. At least one
3154 person was confused, thinking that -bt output corresponded to deliveries.
3155 (Suppressing duplicates isn't a good idea as you lose the information
3156 about possibly different redirections that led to the duplicates.)
3158 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3159 systems where poll() doesn't work, in particular OS X.
3161 PH/10 Added more information to debugging output for retry time not reached.
3163 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3164 operations in malware.c.
3166 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3169 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3170 syslog_duplication set false, log lines that would normally be written
3171 both the the main log and to the reject log were not written to syslog at
3174 PH/14 In the default configuration, change the use of "message" in ACL warn
3175 statements to "add_header".
3177 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3178 not followed by a command (e.g. "seen endif").
3180 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3181 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3184 PH/17 Added extra conditions to the default value of delay_warning_condition
3188 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3189 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3190 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3193 The Auto-Submitted: and various List- headers are standardised, whereas I
3194 don't think Precedence: ever was.
3196 PH/18 Refactored debugging code in route_finduser() to show more information,
3197 in particular, the error code if getpwnam() issues one.
3199 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3200 This is apparently needed in addition to the PH/07 change above to avoid
3201 any possible encoding problems.
3203 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3204 but not after initializing Perl.
3206 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3207 output them only if debugging. By default they are written stderr,
3208 apparently, which is not desirable.
3210 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3213 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3216 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3218 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3219 authenticated or an ident call has been made. Suppress the default
3220 values for $authenticated_id and $authenticated_sender (but permit -oMai
3221 and -oMas) when testing with -bh.
3223 PH/24 Re-jigged the order of the tests in the default configuration so that the
3224 tests for valid domains and recipients precede the DNS black list and CSA
3225 tests, on the grounds that those ones are more expensive.
3227 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3228 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3229 This bug exists in every version of Exim that I still have, right back to
3232 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3233 However, an attempt to turn on case-sensitivity in a regex key by
3234 including (?-i) didn't work because the subject string was already
3235 lowercased, and the effects were non-intuitive. It turns out that a
3236 one-line patch can be used to allow (?-i) to work as expected.
3242 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3243 other effects) broke the use of negated acl sub-conditions.
3245 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3248 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3249 "Deny" causes Exim to reject the incoming connection with a 554 error.
3250 Unfortunately, if there is a major crisis, such as a disk failure,
3251 tcp-wrappers gives "deny", whereas what one would like would be some
3252 kind of temporary error. A kludge has been added to help with this.
3253 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3254 554 error is used if errno is still zero or contains ENOENT (which occurs
3255 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3258 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3260 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3261 errors. Otherwise a message that provokes a temporary error (when other
3262 messages do not) can cause a whole host to time out.
3264 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3265 addresses were routed directly to files or pipes from a redirect router.
3266 File deliveries just didn't batch; pipe deliveries might have suffered
3269 PH/06 A failure to get a lock for a hints database would erroneously always say
3270 "Failed to get write lock", even when it was really a read lock.
3272 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3273 of 0600. This has been changed to use the value of the lockfile_mode
3274 option (which defaults to 0600).
3276 PH/08 Applied small patch from the Sieve maintainer.
3278 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3279 folder from quota calculations, a direct delivery into this folder messed
3280 up the contents of the maildirsize file. This was because the regex was
3281 used only to exclude .Trash (or whatever) when the size of the mailbox
3282 was calculated. There was no check that a delivery was happening into an
3283 excluded directory. This bug has been fixed by ignoring all quota
3284 processing for deliveries into excluded directories.
3286 PH/10 Added the maildirfolder_create_regex option to appendfile.
3292 PH/01 The code for finding all the local interface addresses on a FreeBSD
3293 system running IPv6 was broken. This may well have applied to all BSD
3294 systems, as well as to others that have similar system calls. The broken
3295 code found IPv4 interfaces correctly, but gave incorrect values for the
3296 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3297 that it would not match correctly against @[] and not recognize the IPv6
3300 PH/02 The ipliteral router was not recognizing addresses of the form user@
3301 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3303 PH/03 Added disable_ipv6.
3305 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3306 decoded form, because it is most often used to construct To: headers
3307 lines in autoreplies, and the decoded form may well be syntactically
3308 invalid. However, $reply_address has leading white space removed, and all
3309 newlines turned into spaces so that the autoreply transport does not
3312 PH/05 If group was specified without a user on a router, and no group or user
3313 was specified on a transport, the group from the router was ignored.
3315 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3316 for visible compile-time settings that can be used to change these
3317 numbers, for those that want even more. Backwards compatibility with old
3318 spool files has been maintained. However, going back to a previous Exim
3319 release will lost any variables that are in spool files.
3321 PH/07 Two small changes when running in the test harness: increase delay when
3322 passing a TCP/IP connection to a new process, in case the original
3323 process has to generate a bounce, and remove special handling of
3324 127.0.0.2 (sic), which is no longer necessary.
3326 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3327 be the same on different OS.
3329 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3332 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3333 whether --show-vars was specified or not
3335 JJ/02 exipick: Added support for new ACL variable spool format introduced
3338 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3339 syntactically invalid From: or Reply-to: line, and a filter used this to
3340 generate an autoreply, and therefore failed to obtain an address for the
3341 autoreply, Exim could try to deliver to a non-existent relative file
3342 name, causing unrelated and misleading errors. What now happens is that
3343 it logs this as a hard delivery error, but does not attempt to create a
3346 PH/11 The exinext utility has a -C option for testing purposes, but although
3347 the given file was scanned by exinext itself; it wasn't being passed on
3348 when Exim was called.
3350 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3351 an end-of-file indication when reading a command response.
3353 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3354 compiled. In many other places in Exim, IPv6 addresses are always
3355 recognized, so I have changed this. It also means that IPv4 domain
3356 literals of the form [IPV4:n.n.n.n] are now always recognized.
3358 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3359 used if the router is not running as root, for example, when verifying at
3360 ACL time, or when using -bh. The debugging output from this situation was
3361 non-existent - all you got was a failure to exec. I have made two
3364 (a) Failures to set uid/gid, the current directory, or a process leader
3365 in a subprocess such as that created by queryprogram now generate
3366 suitable debugging output when -d is set.
3368 (b) The queryprogram router detects when it is not running as root,
3369 outputs suitable debugging information if -d is set, and then runs
3370 the subprocess without attempting to change uid/gid.
3372 PH/15 Minor change to Makefile for building test_host (undocumented testing
3375 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3376 additional section of a DNS packet that returns MX or SRV records.
3377 Instead, it always explicitly searches for A/AAAA records. This avoids
3378 major problems that occur when a DNS server includes only records of one
3379 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3380 fixed another bug: if SRV records were looked up and the corresponding
3381 address records were *not* found in the additional section, the port
3382 values from the SRV records were lost.
3384 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3385 using the correct key (the original address) when searching the retry
3386 rules in order to find which one to use for generating the retry hint.
3388 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3389 adding the default one. Similarly, if it contains a Reply-To: header, the
3390 errors_reply_to option, if set, is not used.
3392 PH/19 When calculating a retry time, Exim used to measure the "time since
3393 failure" by looking at the "first failed" field in the retry record. Now
3394 it does not use this if it is later than than the arrival time of the
3395 message. Instead it uses the arrival time. This makes for better
3396 behaviour in cases where some deliveries succeed, thus re-setting the
3397 "first failed" field. An example is a quota failure for a huge message
3398 when small messages continue to be delivered. Without this change, the
3399 "time since failure" will always be short, possible causing more frequent
3400 delivery attempts for the huge message than are intended.
3401 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3403 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3404 $1, $2, $3) because the numerical variables can be reset during some
3405 expansion items (e.g. "match"), thereby losing the authentication data.
3407 PH/21 Make -bV show the size of off_t variables so that the test suite can
3408 decide whether to run tests for quotas > 2G.
3410 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3411 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3412 filecount value is greater than 2G or if a quota value is greater than 2G
3413 on a system where the size of off_t is not greater than 4, a panic error
3416 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3417 never match. The debug and -bh output now contains an explicit error
3418 message indicating a malformed IPv4 address or mask.
3420 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3421 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3422 PH/23 above applies.
3424 PH/25 Do not write to syslog when running in the test harness. The only
3425 occasion when this arises is a failure to open the main or panic logs
3426 (for which there is an explicit test).
3428 PH/26 Added the /no_tell option to "control=freeze".
3430 PH/27 If a host name lookup failed very early in a connection, for example, if
3431 the IP address matched host_lookup and the reverse lookup yielded a name
3432 that did not have a forward lookup, an error message of the form "no IP
3433 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3434 could be logged. Now it outputs the IP address instead of "NULL".
3436 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3437 allows the sender and the authenticated sender to be set when
3438 submitting a message from within Exim. Since child_open_exim() is
3439 documented for local_scan(), the new function should be too.
3441 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3442 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3443 results in an empty string is now treated as unset.
3445 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3447 PH/31 Added sender_verify_fail logging option.
3449 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3450 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3451 tidied the source and removed it altogether.
3453 PH/33 When a queue run was abandoned because the load average was too high, a
3454 log line was always written; now it is written only if the queue_run log
3455 selector is set. In addition, the log line for abandonment now contains
3456 information about the queue run such as the pid. This is always present
3457 in "start" and "stop" lines but was omitted from the "abandon" line.
3459 PH/34 Omit spaces between a header name and the colon in the error message that
3460 is given when verify = headers_syntax fails (if there are lots of them,
3461 the message gets confusing).
3463 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3464 names, as there are now some PTR records that contain slashes. This check
3465 is only to protect against broken name servers that fall over on strange
3466 characters, so the fact that it applies to all lookups doesn't matter.
3468 PH/36 Now that the new test suite is complete, we can remove some of the
3469 special code in Exim that was needed for the old test suite. For example,
3470 sorting DNS records because real resolvers return them in an arbitrary
3471 order. The new test suite's fake resolver always returns records in the
3474 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3475 bounces) except when queue_only is set, to avoid logging races between
3476 the different processes.
3478 PH/38 Panic-die if .include specifies a non-absolute path.
3480 PH/39 A tweak to the "H" retry rule from its user.
3482 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3483 a label. They prevented compilation on older perls.
3485 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3486 a warning to be raised on newish perls.
3488 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3489 on queue. Changes to match documented behaviour of showing count of
3490 messages matching specified criteria.
3492 PH/40 Changed the default ident timeout from 30s to 5s.
3494 PH/41 Added support for the use of login_cap features, on those BSD systems
3495 that have them, for controlling the resources used by pipe deliveries.
3497 PH/42 The content-scanning code uses fopen() to create files in which to put
3498 message data. Previously it was not paying any attention to the mode of
3499 the files. Exim runs with umask(0) because the rest of the code creates
3500 files with open(), and sets the required mode explicitly. Thus, these
3501 files were ending up world-writeable. This was not a big issue, because,
3502 being within the spool directory, they were not world-accessible. I have
3503 created a function called modefopen, which takes an additional mode
3504 argument. It sets umask(777), creates the file, chmods it to the required
3505 mode, then resets the umask. All the relevant calls to fopen() in the
3506 content scanning code have been changed to use this function.
3508 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3509 to 24 hours. This avoids potential overflow problems when processing G
3510 and H retry rules. I suspect nobody ever tinkers with this value.
3512 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3514 PH/45 When the plaintext authenticator is running as a client, the server's
3515 challenges are checked to ensure they are valid base64 strings. By
3516 default, the authentication attempt is cancelled if an invalid string is
3517 received. Setting client_ignore_invalid_base64 true ignores these errors.
3518 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3519 they are received. Thus, the responses can be made to depend on the
3520 challenges. If an invalid string is ignored, an empty string is placed in
3523 PH/46 Messages that are created by the autoreply transport now contains a
3524 References: header, in accordance with RFCs 2822 and 3834.
3526 PH/47 Added authenticated_sender_force to the smtp transport.
3528 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3530 PH/49 Installed latest patch from the Sieve maintainer.
3532 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3533 was also set, the appendfile transport was unnecessarily scanning a
3534 directory of message files (e.g. for maildir delivery) to find the count
3535 of files (along with the size), even though it did not need this
3536 information. It now does the scan only if it needs to find either the
3537 size of the count of files.
3539 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3541 PH/52 Two bugs concerned with error handling when the smtp transport is
3544 (i) Exim was not creating retry information for temporary errors given
3545 for individual recipients after the DATA command when the smtp transport
3546 was used in LMTP mode. This meant that they could be retried too
3547 frequently, and not timed out correctly.
3549 (ii) Exim was setting the flag that allows error details to be returned
3550 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3551 recipients that were returned after the DATA command.
3553 PH/53 This is related to PH/52, but is more general: for any failing address,
3554 when detailed error information was permitted to be returned to the
3555 sender, but the error was temporary, then after the final timeout, only
3556 "retry timeout exceeded" was returned. Now it returns the full error as
3557 well as "retry timeout exceeded".
3559 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3560 do this, and (what is worse) MTAs that accept it.
3562 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3563 will now be deprecated.
3565 PH/56 New os.c-cygwin from the Cygwin maintainer.
3567 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3568 formats (previously only available in exim formats via -bpr, -bpru,
3569 and -bpra. Now also available in native and exiqgrep formats)
3571 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3572 with very large, slow to parse queues
3574 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3576 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3578 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3579 responses to authentication challenges, though it was showing the
3580 challenges; (ii) I've removed the CR characters from the debug output for
3583 PH/58 Allow for the insertion of a newline as well as a space when a string
3584 is turned into more than one encoded-word during RFC 2047 encoding. The
3585 Sieve code now uses this.
3587 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3588 data_4xx, lost_connection, tls_required.
3590 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3591 message was being sent as an SMTP response.
3593 PH/61 Add -l and -k options to exicyclog.
3595 PH/62 When verifying, if an address was redirected to one new address, so that
3596 verification continued, and the new address failed or deferred after
3597 having set something in $address_data, the value of $address_data was not
3598 passed back to the ACL. This was different to the case when no
3599 redirection occurred. The value is now passed back in both cases.
3601 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3602 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3603 use login_cap.h, so on its own it isn't the distinguishing feature. The
3604 new name refers directly to the setclassresources() function.
3606 PH/65 Added configuration files for NetBSD3.
3608 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3610 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3611 is preferred over IPv4.
3613 PH/68 The bounce_return_message and bounce_return_body options were not being
3614 honoured for bounces generated during the reception of non-SMTP messages.
3615 In particular, this applied to messages rejected by the ACL. This bug has
3616 been fixed. However, if bounce_return_message is true and bounce_return_
3617 body is false, the headers that are returned for a non-SMTP message
3618 include only those that have been read before the error was detected.
3619 (In the case of an ACL rejection, they have all been read.)
3621 PH/69 The HTML version of the specification is now built in a directory called
3622 spec_html instead of spec.html, because the latter looks like a path with
3623 a MIME-type, and this confuses some software.
3625 PH/70 Catch two compiler warnings in sieve.c.
3627 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3628 function verify_get_ident() calls ip_connect() to connect a socket, but
3629 if the "connect()" function timed out, ip_connect() used to close the
3630 socket. However, verify_get_ident() also closes the socket later, and in
3631 between Exim writes to the log, which may get opened at this point. When
3632 the socket was closed in ip_connect(), the log could get the same file
3633 descriptor number as the socket. This naturally causes chaos. The fix is
3634 not to close the socket in ip_connect(); the socket should be closed by
3635 the function that creates it. There was only one place in the code where
3636 this was missing, in the iplookup router, which I don't think anybody now
3637 uses, but I've fixed it anyway.
3639 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3640 well as to direct DNS lookups. Otherwise the handling of names in host
3641 lists is inconsistent and therefore confusing.
3647 PH/01 Two changes to the default runtime configuration:
3649 (1) Move the checks for relay_from_hosts and authenticated clients from
3650 after to before the (commented out) DNS black list checks.
3652 (2) Add control=submission to the relay_from_hosts and authenticated
3653 clients checks, on the grounds that messages accepted by these
3654 statements are most likely to be submissions.
3656 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3658 (1) Generate an error if the third argument for the ${prvs expansion is
3661 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3664 (3) Reset the variables that are obtained from the first argument of
3665 ${prvscheck and used in the second argument before leaving the code,
3666 because their memory is reclaimed, so using them afterwards may do
3669 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3670 one (it's much easier than Tom thought :-).
3672 (5) Because of (4), we can now allow for the use of $prvscheck_result
3673 inside the third argument.
3675 PH/03 For some reason, the default setting of PATH when running a command from
3676 a pipe transport was just "/usr/bin". I have changed it to
3679 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3680 anything to be listed in the output from -bV.
3682 PH/05 When a filter generated an autoreply, the entire To: header line was
3683 quoted in the delivery log line, like this:
3685 => >A.N.Other <ano@some.domain> <original@ddress> ...
3687 This has been changed so that it extracts the operative address. There
3688 may be more than one such address. If so, they are comma-separated, like
3691 => >ano@some.domain,ona@other.domain <original@ddress> ...
3693 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3694 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3695 not being looked up in the rDNS to get a host name, Exim was showing the
3696 IP address twice in Received: lines, even though the IP addresses were
3697 identical. For example:
3699 Received: from [1.2.3.4] (helo=[1.2.3.4])
3701 However, if the real host name was known, it was omitting the HELO data
3702 if it matched the actual IP address. This has been tidied up so that it
3703 doesn't show the same IP address twice.
3705 PH/07 When both +timestamp and +memory debugging was on, the value given by
3706 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3707 called by the debug printing, thereby overwriting the timestamp buffer.
3708 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3710 PH/08 When the original message was included in an autoreply transport, it
3711 always said "this is a copy of the message, including all the headers",
3712 even if body_only or headers_only was set. It now gives an appropriate
3715 PH/09 Applied a patch from the Sieve maintainer which:
3717 o fixes some comments
3718 o adds the (disabled) notify extension core
3719 o adds some debug output for the result of if/elsif tests
3720 o points to the current vacation draft in the documentation
3721 and documents the missing references header update
3725 o fixes a bug in processing the envelope test (when testing
3726 multiple envelope elements, the last element determined the
3729 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3730 Electronic Mail") by including:
3732 Auto-submitted: auto-generated
3734 in the messages that it generates (bounce messages and others, such as
3735 warnings). In the case of bounce messages for non-SMTP messages, there was
3736 also a typo: it was using "Auto_submitted" (underscore instead of
3737 hyphen). Since every message generated by Exim is necessarily in response
3738 to another message, thes have all been changed to:
3740 Auto-Submitted: auto-replied
3742 in accordance with these statements in the RFC:
3744 The auto-replied keyword:
3746 - SHOULD be used on messages sent in direct response to another
3747 message by an automatic process,
3749 - MUST NOT be used on manually-generated messages,
3751 - MAY be used on Delivery Status Notifications (DSNs) and Message
3752 Disposition Notifications (MDNs),
3754 - MUST NOT be used on messages generated by automatic or periodic
3755 processes, except for messages which are automatic responses to
3758 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3759 to the default Received: header definition.
3761 PH/12 Added log selector acl_warn_skipped (default on).
3763 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3764 variables because (a) they are in the wrong storage pool and (b) even if
3765 they were copied, it wouldn't work properly because of the caching.
3767 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3768 checking when decoding. Apparently there are clients that generate
3769 overlong encoded strings. Why am I not surprised?
3771 PH/15 If the first argument of "${if match_address" was not empty, but did not
3772 contain an "@" character, Exim crashed. Now it writes a panic log message
3773 and treats the condition as false.
3775 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3777 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3778 extension "envelope-auth". The code is finished and in agreement with
3779 other implementations, but there is no documentation so far and in fact,
3780 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3781 not changing the active code.
3783 Print executed "if" and "elsif" statements when debugging is used. This
3784 helps a great deal to understand what a filter does.
3786 Document more things not specified clearly in RFC3028. I had all this
3787 sorted out, when out of a sudden new issues came to my mind. Oops."
3789 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3792 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3793 canonical form (as documented). However, after a host name lookup from
3794 the IP address, check_host() was doing a simple string comparison with
3795 addresses acquired from the DNS when checking that the found name did
3796 have the original IP as one of its addresses. Since any found IPv6
3797 addresses are likely to be in abbreviated form, the comparison could
3798 fail. Luckily, there already exists a function for doing the comparison
3799 by converting both addresses to binary, so now that is used instead of
3800 the text comparison.
3802 PH/20 There was another similar case to PH/19, when a complete host name was
3803 given in a host list; looking up its IP address could give an abbreviated
3804 form, whereas the current host's name might or might not be abbreviated.
3805 The same fix has been applied.
3811 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3812 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3815 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3816 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3818 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3820 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3821 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3822 Also, for "Auto-Submitted", treat anything other than "no" as
3823 non-personal, in accordance with RFC 3834. (Previously it treated
3824 anything starting "auto-" as non-personal.)
3826 TF/01 The control=submission/name=... option had a problem with syntax
3827 errors if the name included a slash character. The /name= option
3828 now slurps the rest of the string, so it can include any characters
3829 but it must come last in the list of options (after /sender_retain
3832 PH/05 Some modifications to the interface to the fake nameserver for the new
3840 TK/01 Added the "success_on_redirect" address verification option. See
3841 NewStuff for rationale and an example.
3843 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3845 PH/02 Patch to exigrep to allow it to work on syslog lines.
3847 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3848 fread() to skip over the body file's header line, because in Cygwin the
3849 header line is locked and is inaccessible.
3851 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3852 co-exist for some time) to make it clear that it is the Exim ID that is
3853 referenced, not the Message-ID: header line.
3855 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3856 string_format() function, because snprintf() does not exist on all
3859 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3860 ${stat: expansion item.
3862 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3863 protocol synchronization error", to keep the pedants happy.
3865 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3866 well as for IRIX systems, when gcc is being used. See the host.c source
3869 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3871 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3874 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3875 transport and to the smtp transport in LMTP mode.
3877 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3879 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3880 run a filter in a subprocess. This could lead to confusion in subsequent
3881 lookups in the parent process. There should also be a search_tidyup() at
3882 the end of the subprocess.
3884 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3885 only if the host matched helo_try_verify_hosts, which caused the
3886 verification to occur when the EHLO/HELO command was issued. The ACL just
3887 tested the remembered result. Now, if a previous verification attempt has
3888 not happened, "verify = helo" does it there and then.
3890 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3892 TK/03 Fix log output including CR from clamd.
3894 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3895 exist provoked a memory error which could cause a segfault.
3897 PH/15 Installed PCRE 6.2
3899 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3901 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3902 of the problem. Specifically, suggested +O2 rather than +O1 for the
3905 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3907 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3908 record, the port was not correctly logged when the outgoing_port log
3909 selector was set (it logged the transort's default port).
3911 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3912 fallback_hosts, and "hosts" in the smtp transport.
3914 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3915 host errors such as "Connection refused".
3917 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3918 authentication with radiusclient 0.4.9:
3920 - Error returned from rc_read_config was caught wrongly
3921 - Username/password not passed on to radius server due to wrong length.
3923 The presumption is that some radiusclient API changes for 4.51/PH/17
3924 were not taken care of correctly. The code is still untested by me (my
3925 Linux distribution still has 0.3.2 of radiusclient), but it was
3926 contributed by a Radius user.
3928 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3929 expanding the "port" option of the smtp transport.
3931 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3932 while reading a MIME header. Thanks to Tom Hughes for a patch.
3934 PH/24 Include config.h inside local_scan.h so that configuration settings are
3937 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3938 that in an ACL for RCPT (for example), you can examine exactly what was
3941 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3942 commands, but it was not correctly comparing the address with the actual
3943 client host address. Thus, it would show the EHLO address in Received:
3944 header lines when this was not necessary.
3946 PH/27 Added the % operator to ${eval:}.
3948 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3949 it should be ignoring failures (because with -C, for example, it has lost
3950 privilege). It wasn't ignoring creation failures other than "already
3953 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3956 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3957 because an input line was too long, either on its own, or by virtue of
3958 too many continuations, the temporary file was not being removed, and the
3959 return code was incorrect.
3961 PH/31 Missing "BOOL" in function definition in filtertest.c.
3963 PH/32 Applied Sieve patches from the maintainer.
3965 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3967 PH/33 Added "verify = not_blind".
3969 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3970 Local/Makefile (with some defaults set). These are used in built scripts
3971 such as exicyclog, but they have never been used in the exim_install
3972 script (though there are many overriding facilities there). I have
3973 arranged that the exim_install script now takes note of these two
3976 PH/35 Installed configuration files for Dragonfly.
3978 PH/36 When a locally submitted message by a trusted user did not contain a
3979 From: header, and the sender address was obtained from -f or from an SMTP
3980 MAIL command, and the trusted user did not use -F to supply a sender
3981 name, $originator_name was incorrectly used when constructing a From:
3982 header. Furthermore, $originator_name was used for submission mode
3983 messages from external hosts without From: headers in a similar way,
3984 which is clearly wrong.
3986 PH/37 Added control=suppress_local_fixups.
3988 PH/38 When log_selector = +received_sender was set, and the addition of the
3989 sender made the log line's construction buffer exactly full, or one byte
3990 less than full, an overflow happened when the terminating "\n" was
3993 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3994 when the result of a list match is failure because a DNS lookup failed.
3996 PH/40 RM_COMMAND is now used in the building process.
3998 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3999 the "build-* directories that it finds.
4001 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4002 address in a domain literal was a prefix of an interface address.
4004 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4005 when verifying a sender address, unless rewrite_headers is false.
4007 PH/44 Wrote a long comment about why errors_to addresses are verified as
4008 recipients, not senders.
4010 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4011 the ratelimit ACL was added.
4013 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4015 PH/46 Added extra information about PostgreSQL errors to the error string.
4017 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4018 avoiding the need to install special zones in a real server. This is
4019 backwards compatible; if it can't find the fake resolver, it drops back.
4020 Thus, both old and new test suites can be run.
4022 TF/02 Added util/ratelimit.pl
4024 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4025 clock is set back in time.
4027 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4028 Candler <B.Candler@pobox.com>.
4030 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4031 OK for addresses that are the result of redirections.
4033 PH/48 A number of further additions for the benefit of the new test suite,
4034 including a fake gethostbyname() that interfaces to the fake DNS resolver
4037 TF/06 The fix for widen_domains has also been applied to qualify_single and
4038 search_parents which are the other dnslookup options that can cause
4041 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4044 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4046 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4047 service" if it encountered an MX record with an empty target hostname.
4048 The message is now "an MX or SRV record indicated no SMTP service".
4050 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4051 if the DNS of the sending site is misconfigured. This is quite a
4052 common situation. This change restores the behaviour of treating a
4053 helo verification defer as a failure.
4055 PH/51 If self=fail was set on a router, the bounce message did not include the
4056 actual error message.
4062 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4064 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4065 command itself ended in error, the underlying message about the transport
4066 filter timeout was being overwritten with the pipe command error. Now the
4067 underlying error message should be appended to the second error message.
4069 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4071 PH/02 Reduce the amount of output that "make" produces by default. Full output
4072 can still be requested.
4074 PH/03 The warning log line about a condition test deferring for a "warn" verb
4075 was being output only once per connection, rather than after each
4076 occurrence (because it was using the same function as for successful
4077 "warn" verbs). This seems wrong, so I have changed it.
4079 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4080 it should not have, which might have caused a crash in the right
4081 circumstances, but probably never did.
4083 PH/04 Installed a modified version of Tony Finch's patch to make submission
4084 mode fix the return path as well as the Sender: header line, and to
4085 add a /name= option so that you can make the user's friendly name appear
4088 TF/03 Added the control = fakedefer ACL modifier.
4090 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4091 Mark Lowes for thorough testing.
4093 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4095 TK/03 Merged latest SRS patch from Miles Wilton.
4097 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4098 with the definition in sysexits.h (which is #included earlier).
4099 Fortunately, Exim does not actually use EX_OK. The code used to try to
4100 preserve the sysexits.h value, by assuming that macro definitions were
4101 scanned for macro replacements. I have been disabused of this notion,
4102 so now the code just undefines EX_OK before #including unistd.h.
4104 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4105 in the smtp transport. When a block could not be written in a single
4106 write() function, the timeout was being re-applied to each part-write.
4107 This seems wrong - if the receiver was accepting one byte at a time it
4108 would take for ever. The timeout is now adjusted when this happens. It
4109 doesn't have to be particularly precise.
4111 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4112 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4114 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4115 without a domain if the check to <postmaster@domain> fails.
4117 SC/01 Eximstats: added -xls and the ability to specify output files
4118 (patch written by Frank Heydlauf).
4120 SC/02 Eximstats: use FileHandles for outputting results.
4122 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4124 SC/04 Eximstats: fixed display of large numbers with -nvr option
4126 SC/05 Eximstats: fixed merging of reports with empty tables.
4128 SC/06 Eximstats: added the -include_original_destination flag
4130 SC/07 Eximstats: removed tabs and trailing whitespace.
4132 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4134 TK/06 MBOX spool code: Add real "From " MBOX separator line
4135 so the .eml file is really in mbox format (even though
4136 most programs do not really care). Patch from Alex Miller.
4138 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4139 The latter is generated from $received_to and is only set if the
4140 message has one envelope recipient. SA can use these headers,
4141 obviously out-of-the-box. Patch from Alex Miller.
4143 PH/08 The ${def test on a variable was returning false if the variable's
4144 value was "0", contrary to what the specification has always said!
4145 The result should be true unless the variable is empty.
4147 PH/09 The syntax error of a character other than { following "${if
4148 def:variable_name" (after optional whitespace) was not being diagnosed.
4149 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4150 accidental colon was present, for example, could give incorrect results.
4152 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4153 result is used (not including appendfile, where other changes are about
4156 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4157 This involved changing a lot of size variables from int to off_t. It
4158 should work with maildirs and everything.
4160 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4161 spamd dying while we are connected to it.
4163 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4166 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4167 function for BDB 4.3.
4169 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4171 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4172 the sources for PCRE have been re-arranged and more files are now
4175 PH/15 The code I had for printing potentially long long variables in PH/11
4176 above was not the best (it lost precision). The length of off_t variables
4177 is now inspected at build time, and an appropriate printing format (%ld
4178 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4179 to be "long long int" or "long int". This is needed for the internal
4180 formatting function string_vformat().
4182 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4183 the configuration file to be ":syslog", then the script "guesses" where
4184 the logs files are, rather than using the compiled in default. In our
4185 case the guess is not the same as the compiled default, so the script
4186 suddenly stopped working when I started to use syslog. The patch checks
4187 to see if log_file_path is "". If so, it attempts to read it from exim
4188 with no configuration file to get the compiled in version, before it
4189 falls back to the previous guessing code."
4191 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4192 implementing BATV in an Exim configuration. See NewStuff for the gory
4195 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4196 Makefile that are specific to HP-UX.
4198 PH/18 If the "use_postmaster" option was set for a recipient callout together
4199 with the "random" option, the postmaster address was used as the MAIL
4200 FROM address for the random test, but not for the subsequent recipient
4201 test. It is now used for both.
4203 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4204 patch removes a few documentation additions to RFC 3028, because the
4205 latest draft now contains them. It adds the new en;ascii-case comparator
4206 and a new error check for 8bit text in MIME parts. Comparator and
4207 require names are now matched exactly. I enabled the subaddress
4208 extension, but it is not well tested yet (read: it works for me)."
4210 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4211 rework some of the code of TK/09 above to avoid the hardwired use of
4212 "%lld" and "long long". Replaced the call to snprintf() with a call to
4215 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4216 records point to non-existent hosts", "retry timeout exceeded", and
4217 "retry time not reached for any host after a long failure period".
4219 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4220 experimental DomainKeys support:
4222 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4223 (2) On an error such as an illegally used "control", the wrong name for
4224 the control was given.
4226 These problems did NOT occur unless DomainKeys support was compiled.
4228 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4230 PH/24 Added ${if match_ip condition.
4232 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4233 databases so that it will be absolutely obvious if a crash occurs in the
4234 DB library. This is a regular occurrence (often caused by mis-matched
4237 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4238 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4239 picked up on a user's system that detects such things. There doesn't seem
4240 to be a gcc warning option for this - only an attribute that has to be
4241 put on the function's prototype. It seems that in Fedora Core 4 they have
4242 set this on a number of new functions. No doubt there will be more in due
4245 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4246 specify a transport. However, if an address that was verified by such a
4247 router was the subject of a callout, Exim crashed because it tried to
4248 read the rcpt_include_affixes from the non-existent transport. Now it
4249 just assumes that the setting of that option is false. This bug was
4250 introduced by 4.51/PH/31.
4252 PH/28 Changed -d+all to exclude +memory, because that information is very
4253 rarely of interest, but it makes the output a lot bigger. People tend to
4254 do -d+all out of habit.
4256 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4257 code in os-type was giving problems when libc.so lives in lib64, like on
4260 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4261 aren't the modern standard, and it seems that some systems' include files
4262 don't always have them. Exim was already checking for some of the newer
4263 ones like T_AAAA, and defining it itself. I've added checks for all the
4264 record types that Exim uses.
4266 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4267 not automatically generating a new one, as it is supposed to. This
4268 prevented TLS from working. If the file did exist, but contained invalid
4269 data, a new version was generated, as expected. It was only the case of a
4270 non-existent file that was broken.
4272 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4273 with a change in libdomainkeys > 0.64.
4275 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4276 from DNS. If the selector record carries the flag, it now has
4277 precedence over the domain-wide flag.
4279 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4281 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4282 the use of a port name that isn't defined in /etc/services) occurred, the
4283 message was deferred as in a normal delivery, and thus remained on the
4284 spool, instead of being failed because of the mua_wrapper setting. This
4285 is now fixed, and I tidied up some of the mua_wrapper messages at the
4288 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4289 the messages in a hash of arrays rather than using individual hashes.
4290 This is a bit cleaner and results in dramatic memory savings, albeit
4291 at a slight CPU cost.
4293 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4294 as requested by Marc Sherman.
4296 SC/10 Eximstats: added histograms for user specified patterns as requested
4299 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4301 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4302 fopen() in the content-scanning modules that did not already have it.
4308 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4309 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4311 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4313 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4315 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4316 to test Sieve filters that use "vacation".
4318 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4319 that changes the way the GnuTLS parameters are stored in the cache file.
4320 The new format can be generated externally. For backward compatibility,
4321 if the data in the cache doesn't make sense, Exim assumes it has read an
4322 old-format file, and it generates new data and writes a new file. This
4323 means that you can't go back to an older release without removing the
4326 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4327 work if there are any delivery delays because "one_time" forces the
4328 parent to be marked "delivered", so its unseen clone is never tried
4329 again. For this reason, Exim now forbids the simultaneous setting of
4332 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4333 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4334 entry if you want to know the details. The fix, however, neglected to
4335 consider the case when local delivery batching is involved. The test for
4336 "previously delivered" was not happening when checking to see if an
4337 address could be batched with a previous (undelivered) one; under
4338 certain circumstances this could lead to multiple deliveries to the same
4341 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4342 in its include files, and this causes problems building Exim.
4344 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4345 header_syntax) but Exim was just ignoring anything given after a slash.
4346 In particular, this caused confusion with an attempt to use "verify =
4347 reverse_host_lookup/defer_ok". An error is now given when options are
4348 supplied for verify items that do not have them. (Maybe reverse_host_
4349 lookup should have a defer_ok option, but that's a different point.)
4351 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4352 defined by RFC 821) to 2048, because there were problems with some AUTH
4353 commands, and RFC 1869 says the size should be increased for extended
4354 SMTP commands that take arguments.
4356 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4359 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4360 "unknown" error; now it says that the functionality isn't in the binary.
4362 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4363 an address' error message when a string expansion fails (syntax or
4364 whatever). Otherwise the password may appear in the log. Following change
4365 PH/42 below, there is no longer a chance of it appearing in a bounce
4368 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4370 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4371 of its addresses was ever tried. (Bugzilla bug #2.)
4373 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4374 the result incorrectly in the debug output. (It correctly added a newline
4375 to what was transported.)
4377 TF/01 Added $received_time.
4379 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4380 commented out examples of how to interface to a virus scanner and to
4381 SpamAssassin. Also added commented examples of av_scanner and
4382 spamd_address settings.
4384 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4385 and controls are allowed in which ACLs. There were a couple of minor
4386 errors. Some of the entries in the conditions table (which is a table of
4387 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4388 negation of where the condition IS allowed.
4390 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4392 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4393 header file does not have a version number, so I've had to invent a new
4394 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4395 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4396 radiusclient), but it was contributed by a Radius user.
4398 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4399 files or directories, for OpenSSL.
4401 PH/19 When an Exim process that is running as root has to create an Exim log
4402 file, it does so in a subprocess that runs as exim:exim so as to get the
4403 ownership right at creation (otherwise, other Exim processes might see
4404 the file with the wrong ownership). There was no test for failure of this
4405 fork() call, which would lead to the process getting stuck as it waited
4406 for a non-existent subprocess. Forks do occasionally fail when resources
4407 run out. I reviewed all the other calls to fork(); they all seem to check
4410 PH/20 When checking for unexpected SMTP input at connect time (before writing
4411 the banner), Exim was not dealing correctly with a non-positive return
4412 from the read() function. If the client had disconnected by this time,
4413 the result was a log entry for a synchronization error with an empty
4414 string after "input=" when read() returned zero. If read() returned -1
4415 (an event I could not check), uninitialized data bytes were printed.
4416 There were reports of junk text (parts of files, etc) appearing after
4419 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4421 PH/22 Added support for macro redefinition, and (re)definition in between
4422 driver and ACL definitions.
4424 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4425 forgetting to use the resulting value; it was using the unexpanded value.
4427 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4428 hadn't been configured. The fix is from Juergen Kreileder, who
4429 understands it better than I do:
4431 "Here's what I see happening with three configured cyrus_sasl
4432 authenticators configured (plain, login, cram-md5):
4434 On startup auth_cyrus_sasl_init() gets called for each of these.
4435 This means three calls to sasl_listmech() without a specified mech_list.
4436 => SASL tests which mechs of all available mechs actually work
4437 => three warnings about OTP not working
4438 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4440 With the patch, sasl_listmech() also gets called three times. But now
4441 SASL's mech_list option is set to the server_mech specified in the the
4442 authenticator. Or in other words, the answer from sasl_listmech()
4443 gets limited to just the mech you're testing for (which is different
4445 => the return list contains just 'plain' or 'login', 'cram-md5' or
4446 nothing depending on the value of ob->server_mech.
4448 I've just tested the patch: Authentication still works fine,
4449 unavailable mechs specified in the exim configuration are still
4450 caught, and the auth.log warnings about OTP are gone."
4452 PH/25 When debugging is enabled, the contents of the command line are added
4453 to the debugging output, even when log_selector=+arguments is not
4456 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4457 answer is "GNU", and only if the return is "GNU/something" is the answer
4460 PH/27 $acl_verify_message is now set immediately after the failure of a
4461 verification in an ACL, and so is available in subsequent modifiers. In
4462 particular, the message can be preserved by coding like this:
4464 warn !verify = sender
4465 set acl_m0 = $acl_verify_message
4467 Previously, $acl_verify_message was set only while expanding "message"
4468 and "log_message" when a very denied access.
4470 PH/28 Modified OS/os.c-Linux with
4472 -#ifndef OS_LOAD_AVERAGE
4473 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4475 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4476 nomenclature these days.)
4478 PH/29 Installed patch from the Sieve maintainer that adds the options
4479 sieve_useraddress and sieve_subaddress to the redirect router.
4481 PH/30 In these circumstances:
4482 . Two addresses routed to the same list of hosts;
4483 . First host does not offer TLS;
4484 . First host accepts first address;
4485 . First host gives temporary error to second address;
4486 . Second host offers TLS and a TLS session is established;
4487 . Second host accepts second address.
4488 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4489 and peerdn, if requested) that were in fact used only for the second
4492 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4493 attention to any local part prefix or suffix that was matched by the
4494 router that accepted the address. It now behaves in the same way as it
4495 does for delivery: the affixes are removed from the local part unless
4496 rcpt_include_affixes is set on the transport.
4498 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4499 timeout during the DATA phase of an incoming message.
4501 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4502 applied a patch sanctioned by the Sieve maintainer.
4504 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4505 the uid or gid is negative. A case of a negative gid caused this to be
4506 noticed. The fix allows for either to be negative.
4508 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4509 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4512 PH/36 The change PH/12 above was broken. Fixed it.
4514 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4515 the grounds that routing the same address twice would always produce the
4516 same answer. This might have been true once, but it is certainly no
4517 longer true now. Routing a child address may depend on the previous
4518 routing that produced that child. Some complicated redirection strategies
4519 went wrong when messages had multiple recipients, and made Exim's
4520 behaviour dependent on the order in which the addresses were given.
4522 I have moved the duplicate checking until after the routing is complete.
4523 Exim scans the addresses that are assigned to local and remote
4524 transports, and removes any duplicates. This means that more work will be
4525 done, as duplicates will always all be routed, but duplicates are
4526 presumably rare, so I don't expect this is of any significance.
4528 For deliveries to pipes, files, and autoreplies, the duplicate checking
4529 still happens during the routing process, since they are not going to be
4532 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4533 It corrects a timeout issue with spamd. This is Ian's comment: "The
4534 background is that sometimes spamd either never reads data from a
4535 connection it has accepted, or it never writes response data. The exiscan
4536 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4537 blindly assumes that writes won't block so it may never time out."
4539 PH/39 Allow G after quota size as well as K and M.
4541 PH/40 The value set for $authenticated_id in an authenticator may not contain
4542 binary zeroes or newlines because the value is written to log lines and
4543 to spool files. There was no check on this. Now the value is run through
4544 the string_printing() function so that such characters are converted to
4545 printable escape sequences.
4547 PH/41 $message_linecount is a new variable that contains the total number of
4548 lines in the message. Compare $body_linecount, which is the count for the
4551 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4552 bounce and delay warning messages, except in certain special cases, which
4555 (a) An SMTP error message from a remote host;
4556 (b) A message specified in a :fail: redirection;
4557 (c) A message specified in a "fail" command in a system filter;
4558 (d) A message specified in a FAIL return from the queryprogram router;
4559 (e) A message specified by the cannot_route_message router option.
4561 In these cases only, Exim does include the error details in bounce and
4562 warning messages. There are also a few cases where bland messages such
4563 as "unrouteable address" or "local delivery error" are given.
4565 PH/43 $value is now also set for the "else" part of a ${run expansion.
4567 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4568 being worked on, but at least Exim now implements the latest version to
4571 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4572 process to complete was treated as a delivery failure, a timeout while
4573 writing the message to the pipe was logged, but erroneously treated as a
4574 successful delivery. Such timeouts include transport filter timeouts. For
4575 consistency with the overall process timeout, these timeouts are now
4576 treated as errors, giving rise to delivery failures by default. However,
4577 there is now a new Boolean option for the pipe transport called
4578 timeout_defer, which, if set TRUE, converts the failures into defers for
4579 both kinds of timeout. A transport filter timeout is now identified in
4582 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4583 systems where "make" and "gmake" are different, calling "gmake" at top
4584 level broke things. I've arranged for the value of $(MAKE) to be passed
4585 from the Makefile to this script so that it can call the same version of
4589 A note about Exim versions 4.44 and 4.50
4590 ----------------------------------------
4592 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4593 changes of various kinds. As a consequence, a big documentation update was
4594 needed. This delayed the release for rather longer than seemed good, especially
4595 in the light of a couple of (minor) security issues. Therefore, the changes
4596 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4597 release. So 4.44 and 4.50 are in effect two different branches that both start
4600 I have left the 4.50 change log unchanged; it contains all the changes since
4601 4.43. The change log for 4.44 is below; many of its items are identical to
4602 those for 4.50. This seems to be the most sensible way to preserve the
4603 historical information.
4609 1. Minor wording change to the doc/README.SIEVE file.
4611 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4612 computation of the current number of files was incorrect.
4614 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4615 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4618 4. Give more explanation in the error message when the command for a transport
4619 filter fails to execute.
4621 5. There are several places where Exim runs a non-Exim command in a
4622 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4623 was being done only for the command run by the queryprogram router. It is
4624 now done for all such subprocesses. The other cases are: ${run, transport
4625 filters, and the commands run by the lmtp and pipe transports.
4627 6. Added CONFIGURE_GROUP build-time option.
4629 7. Some older OS have a limit of 256 on the maximum number of file
4630 descriptors. Exim was using setrlimit() to set 1000 as a large value
4631 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4632 systems. I've change it so that if it can't get 1000, it tries for 256.
4634 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4635 was an oversight, and furthermore, ever since the addition of extra
4636 controls (e.g. 4.43/32), the checks on when to allow different forms of
4637 "control" were broken. There should now be diagnostics for all cases when a
4638 control that does not make sense is encountered.
4640 9. Added the /retain_sender option to "control=submission".
4642 10. $recipients is now available in the predata ACL (oversight).
4644 11. Tidy the search cache before the fork to do a delivery from a message
4645 received from the command line. Otherwise the child will trigger a lookup
4646 failure and thereby defer the delivery if it tries to use (for example) a
4647 cached ldap connection that the parent has called unbind on.
4649 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4650 of $address_data from the recipient verification was clobbered by the
4651 sender verification.
4653 13. The value of address_data from a sender verification is now available in
4654 $sender_address_data in subsequent conditions in the ACL statement.
4656 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4658 15. Added a new option "connect=<time>" to callout options, to set a different
4661 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4662 was its contents. (It was OK if the option was not defined at all.)
4664 17. A "Completed" log line is now written for messages that are removed from
4665 the spool by the -Mrm option.
4667 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4668 information about exactly what failed.
4670 19. Added -dd to debug only the daemon process.
4672 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4673 handles timeouts, both on the server side and network timeouts. Renamed the
4674 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4676 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4677 It is now set to "smtps".
4679 22. $host_address is now set to the target address during the checking of
4680 ignore_target_hosts.
4682 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4683 being passed; this would have caused $sender_host_name to have been used if
4684 matching the list had actually called for a host name (not very likely,
4685 since this list is usually IP addresses). A host name is now passed as
4688 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4689 code that specifies a non-restarting handler (typically sigaction() in
4690 modern systems) in an attempt to fix a rare and obscure crash bug.
4692 25. Narrowed the window for a race in the daemon that could cause it to ignore
4693 SIGCHLD signals. This is not a major problem, because they are used only to
4694 wake it up if nothing else does.
4696 26. A malformed maildirsize file could cause Exim to calculate negative values
4697 for the mailbox size or file count. Odd effects could occur as a result.
4698 The maildirsize information is now recalculated if the size or filecount
4701 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4702 support for a long time. Removed HAVE_SYS_VFS_H.
4704 28. Installed the latest version of exipick from John Jetmore.
4706 29. In an address list, if the pattern was not a regular expression, an empty
4707 subject address (from a bounce message) matched only if the pattern was an
4708 empty string. Non-empty patterns were not even tested. This was the wrong
4709 because it is perfectly reasonable to use an empty address as part of a
4710 database query. An empty address is now tested by patterns that are
4711 lookups. However, all the other forms of pattern expect the subject to
4712 contain a local part and a domain, and therefore, for them, an empty
4713 address still always fails if the pattern is not itself empty.
4715 30. Exim went into a mad DNS loop when attempting to do a callout where the
4716 host was specified on an smtp transport, and looking it up yielded more
4717 than one IP address.
4719 31. Re-factored the code for checking spool and log partition space into a
4720 function that finds that data and another that does the check. The former
4721 is then used to implement four new variables: $spool_space, $log_space,
4722 $spool_inodes, and $log_inodes.
4724 32. The RFC2047 encoding function was originally intended for short strings
4725 such as real names; it was not keeping to the 75-character limit for
4726 encoded words that the RFC imposes. It now respects the limit, and
4727 generates multiple encoded words if necessary. To be on the safe side, I
4728 have increased the buffer size for the ${rfc2047: expansion operator from
4731 33. It is now permitted to omit both strings after an "if" condition; if the
4732 condition is true, the result is "true". As before, when the second string
4733 is omitted, a false condition yields an empty string. This makes it less
4734 cumbersome to write custom ACL and router conditions.
4736 34. Failure to deliver a bounce message always caused it to be frozen, even if
4737 there was an errors_to setting on the router. The errors_to setting is now
4740 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4741 canonical form (fully expanded) before being placed in
4742 $sender_host_address.
4744 36. The table in the code that translates DNS record types into text (T_A to
4745 "A" for instance) was missing entries for NS and CNAME. It is just possible
4746 that this could have caused confusion if both these types were looked up
4747 for the same domain, because the text type is used as part of Exim's
4748 per-process caching. But the chance of anyone hitting this buglet seems
4751 37. The dnsdb lookup has been extended in a number of ways.
4753 (1) There is a new type, "zns", which walks up the domain tree until it
4754 finds some nameserver records. It should be used with care.
4756 (2) There is a new type, "mxh", which is like "mx" except that it returns
4757 just the host names, not the priorities.
4759 (3) It is now possible to give a list of domains (or IP addresses) to be
4760 looked up. The behaviour when one of the lookups defers can be
4761 controlled by a keyword.
4763 (4) It is now possible to specify the separator character for use when
4764 multiple records are returned.
4766 38. The dnslists ACL condition has been extended: it is now possible to supply
4767 a list of IP addresses and/or domains to be looked up in a particular DNS
4770 39. Added log_selector=+queue_time_overall.
4772 40. When running the queue in the test harness, wait just a tad after forking a
4773 delivery process, to get repeatability of debugging output.
4775 41. Include certificate and key file names in error message when GnuTLS fails
4776 to set them up, because the GnuTLS error message doesn't include the name
4777 of the failing file when there is a problem reading it.
4779 42. Allow both -bf and -bF in the same test run.
4781 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4783 44. The "Exiscan patch" is now merged into the mainline Exim source.
4785 45. Sometimes the final signoff response after QUIT could fail to get
4786 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4787 < 0 before doing a fflush(). This bug looks as though it goes back to the
4788 introduction of TLS in release 3.20, but "sometimes" must have been rare
4789 because the tests only now provoked it.
4791 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4792 (this can affect the format of dates).
4794 47. exim_tidydb, when checking for the continued existence of a message for
4795 which it has found a message-specific retry record, was not finding
4796 messages that were in split spool directories. Consequently, it was
4797 deleting retry records that should have stayed in existence.
4799 48. Steve fixed some bugs in eximstats.
4801 49. The SPA authentication driver was not abandoning authentication and moving
4802 on to the next authenticator when an expansion was forced to fail,
4803 contradicting the general specification for all authenticators. Instead it
4804 was generating a temporary error. It now behaves as specified.
4806 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4807 (the order specifies the preference for clients). The order is now AES256,
4808 AES128, 3DES, ARCFOUR128.
4810 51. Small patch to Sieve code - explicitly set From: when generating an
4813 52. Exim crashed if a remote delivery caused a very long error message to be
4814 recorded - for instance if somebody sent an entire SpamAssassin report back
4815 as a large number of 550 error lines. This bug was coincidentally fixed by
4816 increasing the size of one of Exim's internal buffers (big_buffer) that
4817 happened as part of the Exiscan merge. However, to be on the safe side, I
4818 have made the code more robust (and fixed the comments that describe what
4821 53. Now that there can be additional text after "Completed" in log lines (if
4822 the queue_time_overall log selector is set), a one-byte patch to exigrep
4823 was needed to allow it to recognize "Completed" as not the last thing in
4826 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4827 patch that reportedly fixes this has been added. I am not expert enough to
4828 create a test for it. This is what the patch creator wrote:
4830 "I found a little strange behaviour of ldap code when working with
4831 Windows 2003 AD Domain, where users was placed in more than one
4832 Organization Units. When I tried to give exim partial DN, the exit code
4833 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4834 But simultaneously result of request was absolutely normal ldap result,
4835 so I produce this patch..."
4837 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4838 REFERENCE, so I have modified the code to exclude the patch when that macro
4841 55. Some experimental protocols are using DNS PTR records for new purposes. The
4842 keys for these records are domain names, not reversed IP addresses. The
4843 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4844 leaves it alone. Component reversal etc. now happens only for IP addresses.
4847 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4849 57. Double the size of the debug message buffer (to 2048) so that more of very
4850 long debug lines gets shown.
4852 58. The exicyclog utility now does better if the number of log files to keep
4853 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4855 59. Two changes related to the smtp_active_hostname option:
4857 (1) $smtp_active_hostname is now available as a variable.
4858 (2) The default for smtp_banner uses $smtp_active_hostname instead
4859 of $primary_hostname.
4861 60. The host_aton() function is supposed to be passed a string that is known
4862 to be a valid IP address. However, in the case of IPv6 addresses, it was
4863 not checking this. This is a hostage to fortune. Exim now panics and dies
4864 if the condition is not met. A case was found where this could be provoked
4865 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4866 components; fortuitously, this particular loophole had already been fixed
4867 by change 4.50/55 above.
4869 If there are any other similar loopholes, the new check in host_aton()
4870 itself should stop them being exploited. The report I received stated that
4871 data on the command line could provoke the exploit when Exim was running as
4872 exim, but did not say which command line option was involved. All I could
4873 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4874 running as the user.
4877 61. There was a buffer overflow vulnerability in the SPA authentication code
4878 (which came originally from the Samba project). I have added a test to the
4879 spa_base64_to_bits() function which I hope fixes it.
4882 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4883 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4885 63. The daemon start-up calls getloadavg() while still root for those OS that
4886 need the first call to be done as root, but it missed one case: when
4887 deliver_queue_load_max is set with deliver_drop_privilege. This is
4888 necessary for the benefit of the queue runner, because there is no re-exec
4889 when deliver_drop_privilege is set.
4891 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4892 This has been fixed.
4894 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4895 was in use, was not putting the data itself into the right store pool;
4896 consequently, it could be overwritten for a subsequent message in the same
4897 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4900 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4902 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4903 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4904 the function were treating the return as a boolean value, which happened to
4905 work because 0=false and not-0=true, but is not correct code.
4907 68. The host_aton() function was not handling scoped IPv6 addresses (those
4908 with, for example, "%eth0" on the end) correctly.
4910 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4911 negated items (that is, ~something) in unsigned ints. Some compilers
4912 apparently mutter when there is no cast.
4914 70. If an address verification called from an ACL failed, and did not produce a
4915 user-specific message (i.e. there was only a "system" message), nothing was
4916 put in $acl_verify_message. In this situation, it now puts the system
4919 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4920 session; change 4.31/43 added the unwanted input to the log line - except
4921 that it did not do this in the start of session case. It now does.
4923 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4924 This is wrong and can cause the other end to generate a synchronization
4925 error if it is another Exim or anything else that does the synchronization
4926 check. A QUIT command is no longer sent after a timeout.
4928 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4929 during host lookups.
4931 74. The defer_ok option of callout verification was not working if it was used
4932 when verifying addresses in header lines, that is, for this case:
4934 verify = header_sender/callout=defer_ok
4936 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4937 those file descriptors could be used for SMTP connections. If anything
4938 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4939 could be sent to the SMTP client, causing chaos. The daemon now opens
4940 stdin, stdout, and stderr to /dev/null when it puts itself into the
4943 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4944 log by default. The user can override this with suitable Perl magic.
4946 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4947 the log message when discard triggers, was not working for the DATA ACL or
4948 for the non-SMTP ACL.
4950 78. Error message wording change in sieve.c.
4952 79. If smtp_accept_max_per_host was set, the number of connections could be
4953 restricted to fewer than expected, because the daemon was trying to set up
4954 a new connection before checking whether the processes handling previous
4955 connections had finished. The check for completed processes is now done
4956 earlier. On busy systems, this bug wouldn't be noticed because something
4957 else would have woken the daemon, and it would have reaped the completed
4960 80. If a message was submitted locally by a user whose login name contained one
4961 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4962 It caused a spool format error. I have fixed the spool reading code. A
4963 related problem was that the "from" clause in the Received: line became
4964 illegal because of the space(s). It is now covered by ${quote_local_part.
4966 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4969 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4971 83. Patch from Sieve maintainer to fix unterminated string problem in
4972 "vacation" handling.
4974 84. Some minor changes to the Linux configuration files to help with other
4975 OS variants using glibc.
4977 85. One more patch for Sieve to update vacation handling to latest spec.
4980 ----------------------------------------------------
4981 See the note above about the 4.44 and 4.50 releases.
4982 ----------------------------------------------------
4988 1. Change 4.43/35 introduced a bug that caused file counts to be
4989 incorrectly computed when quota_filecount was set in an appendfile
4992 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4993 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4996 3. Give more explanation in the error message when the command for a transport
4997 filter fails to execute.
4999 4. There are several places where Exim runs a non-Exim command in a
5000 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5001 was being done only for the command run by the queryprogram router. It is
5002 now done for all such subprocesses. The other cases are: ${run, transport
5003 filters, and the commands run by the lmtp and pipe transports.
5005 5. Some older OS have a limit of 256 on the maximum number of file
5006 descriptors. Exim was using setrlimit() to set 1000 as a large value
5007 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5008 systems. I've change it so that if it can't get 1000, it tries for 256.
5010 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5011 was an oversight, and furthermore, ever since the addition of extra
5012 controls (e.g. 4.43/32), the checks on when to allow different forms of
5013 "control" were broken. There should now be diagnostics for all cases when a
5014 control that does not make sense is encountered.
5016 7. $recipients is now available in the predata ACL (oversight).
5018 8. Tidy the search cache before the fork to do a delivery from a message
5019 received from the command line. Otherwise the child will trigger a lookup
5020 failure and thereby defer the delivery if it tries to use (for example) a
5021 cached ldap connection that the parent has called unbind on.
5023 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5024 of $address_data from the recipient verification was clobbered by the
5025 sender verification.
5027 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5028 was its contents. (It was OK if the option was not defined at all.)
5030 11. A "Completed" log line is now written for messages that are removed from
5031 the spool by the -Mrm option.
5033 12. $host_address is now set to the target address during the checking of
5034 ignore_target_hosts.
5036 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5037 being passed; this would have caused $sender_host_name to have been used if
5038 matching the list had actually called for a host name (not very likely,
5039 since this list is usually IP addresses). A host name is now passed as
5042 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5043 code that specifies a non-restarting handler (typically sigaction() in
5044 modern systems) in an attempt to fix a rare and obscure crash bug.
5046 15. Narrowed the window for a race in the daemon that could cause it to ignore
5047 SIGCHLD signals. This is not a major problem, because they are used only to
5048 wake it up if nothing else does.
5050 16. A malformed maildirsize file could cause Exim to calculate negative values
5051 for the mailbox size or file count. Odd effects could occur as a result.
5052 The maildirsize information is now recalculated if the size or filecount
5055 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5056 support for a long time. Removed HAVE_SYS_VFS_H.
5058 18. Updated exipick to current release from John Jetmore.
5060 19. Allow an empty sender to be matched against a lookup in an address list.
5061 Previously the only cases considered were a regular expression, or an
5064 20. Exim went into a mad DNS lookup loop when doing a callout where the
5065 host was specified on the transport, if the DNS lookup yielded more than
5068 21. The RFC2047 encoding function was originally intended for short strings
5069 such as real names; it was not keeping to the 75-character limit for
5070 encoded words that the RFC imposes. It now respects the limit, and
5071 generates multiple encoded words if necessary. To be on the safe side, I
5072 have increased the buffer size for the ${rfc2047: expansion operator from
5075 22. Failure to deliver a bounce message always caused it to be frozen, even if
5076 there was an errors_to setting on the router. The errors_to setting is now
5079 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5080 canonical form (fully expanded) before being placed in
5081 $sender_host_address.
5083 24. Updated eximstats to version 1.33
5085 25. Include certificate and key file names in error message when GnuTLS fails
5086 to set them up, because the GnuTLS error message doesn't include the name
5087 of the failing file when there is a problem reading it.
5089 26. Expand error message when OpenSSL has problems setting up cert/key files.
5092 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5093 (this can affect the format of dates).
5095 28. exim_tidydb, when checking for the continued existence of a message for
5096 which it has found a message-specific retry record, was not finding
5097 messages that were in split spool directories. Consequently, it was
5098 deleting retry records that should have stayed in existence.
5100 29. eximstats updated to version 1.35
5101 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5102 1.35 - bugfix such that pie charts by volume are generated correctly
5104 30. The SPA authentication driver was not abandoning authentication and moving
5105 on to the next authenticator when an expansion was forced to fail,
5106 contradicting the general specification for all authenticators. Instead it
5107 was generating a temporary error. It now behaves as specified.
5109 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5110 (the order specifies the preference for clients). The order is now AES256,
5111 AES128, 3DES, ARCFOUR128.
5113 31. Small patch to Sieve code - explicitly set From: when generating an
5116 32. Exim crashed if a remote delivery caused a very long error message to be
5117 recorded - for instance if somebody sent an entire SpamAssassin report back
5118 as a large number of 550 error lines. This bug was coincidentally fixed by
5119 increasing the size of one of Exim's internal buffers (big_buffer) that
5120 happened as part of the Exiscan merge. However, to be on the safe side, I
5121 have made the code more robust (and fixed the comments that describe what
5124 33. Some experimental protocols are using DNS PTR records for new purposes. The
5125 keys for these records are domain names, not reversed IP addresses. The
5126 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5127 leaves it alone. Component reversal etc. now happens only for IP addresses.
5130 34. The host_aton() function is supposed to be passed a string that is known
5131 to be a valid IP address. However, in the case of IPv6 addresses, it was
5132 not checking this. This is a hostage to fortune. Exim now panics and dies
5133 if the condition is not met. A case was found where this could be provoked
5134 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5135 components; fortuitously, this particular loophole had already been fixed
5136 by change 4.50/55 or 4.44/33 above.
5138 If there are any other similar loopholes, the new check in host_aton()
5139 itself should stop them being exploited. The report I received stated that
5140 data on the command line could provoke the exploit when Exim was running as
5141 exim, but did not say which command line option was involved. All I could
5142 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5143 running as the user.
5146 35. There was a buffer overflow vulnerability in the SPA authentication code
5147 (which came originally from the Samba project). I have added a test to the
5148 spa_base64_to_bits() function which I hope fixes it.
5151 36. The daemon start-up calls getloadavg() while still root for those OS that
5152 need the first call to be done as root, but it missed one case: when
5153 deliver_queue_load_max is set with deliver_drop_privilege. This is
5154 necessary for the benefit of the queue runner, because there is no re-exec
5155 when deliver_drop_privilege is set.
5157 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5158 was in use, was not putting the data itself into the right store pool;
5159 consequently, it could be overwritten for a subsequent message in the same
5160 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5163 38. Sometimes the final signoff response after QUIT could fail to get
5164 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5165 < 0 before doing a fflush(). This bug looks as though it goes back to the
5166 introduction of TLS in release 3.20, but "sometimes" must have been rare
5167 because the tests only now provoked it.
5173 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5174 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5175 Now it returns an integer. A number of calls were still expecting a T/F
5176 return. Fortuitously, in all cases, the tests worked in OK situations,
5177 which is the norm. However, things would have gone wrong on any write
5178 failures on the smtp file descriptor. This function is used when sending
5179 messages over SMTP and also when doing verify callouts.
5181 2. When Exim is called to do synchronous delivery of a locally submitted
5182 message (the -odf or -odi options), it no longer closes stderr before doing
5185 3. Implemented the mua_wrapper option.
5187 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5189 5. Implemented the functions header_remove(), header_testname(),
5190 header_add_at_position(), and receive_remove_recipient(), and exported them
5193 6. If an ACL "warn" statement specified the addition of headers, Exim already
5194 inserted X-ACL-Warn: at the start if there was no header name. However, it
5195 was not making this test for the second and subsequent header lines if
5196 there were newlines in the string. This meant that an invalid header could
5197 be inserted if Exim was badly configured.
5199 7. Allow an ACL "warn" statement to add header lines at the start or after all
5200 the Received: headers, as well as at the end.
5202 8. Added the rcpt_4xx retry error code.
5204 9. Added postmaster_mailfrom=xxx to callout verification option.
5206 10. Added mailfrom=xxxx to the callout verification option, for verify=
5209 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5210 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5212 12. Inserted some casts to stop certain compilers warning when using pointer
5213 differences as field lengths or precisions in printf-type calls (mostly
5214 affecting debugging statements).
5216 13. Added optional readline() support for -be (dynamically loaded).
5218 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5219 same clock tick as a message's arrival, so that its received time was the
5220 same as the "first fail" time on the retry record, and that message
5221 remained on the queue past the ultimate address timeout, every queue runner
5222 would try a delivery (because it was past the ultimate address timeout) but
5223 after another failure, the ultimate address timeout, which should have then
5224 bounced the address, did not kick in. This was a "< instead of <=" error;
5225 in most cases the first failure would have been in the next clock tick
5226 after the received time, and all would be well.
5228 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5229 being recognized when the domain list was tested by the match_domain
5230 condition in an expansion string.
5232 16. Added the ${str2b64: operator.
5234 17. Exim was always calling setrlimit() to set a large limit for the number of
5235 processes, without checking whether the existing limit was already
5236 adequate. (It did check for the limit on file descriptors.) Furthermore,
5237 errors from getrlimit() and setrlimit() were being ignored. Now they are
5238 logged to the main and panic logs, but Exim does carry on, to try to do its
5239 job under whatever limits there are.
5241 18. Imported PCRE 5.0.
5243 19. Trivial typo in log message " temporarily refused connection" (the leading
5246 20. If the log selector return_path_on_delivery was set and an address was
5247 redirected to /dev/null, the delivery process crashed because it assumed
5248 that a return path would always be set for a "successful" delivery. In this
5249 case, the whole delivery is bypassed as an optimization, and therefore no
5252 21. Internal re-arrangement: the function for sending a challenge and reading
5253 a response while authentication was assuming a zero-terminated challenge
5254 string. It's now changed to take a pointer and a length, to allow for
5255 binary data in such strings.
5257 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5259 23. Exim was not respecting finduser_retries when seeking the login of the
5260 uid under which it was called; it was always trying 10 times. (The default
5261 setting of finduser_retries is zero.) Also, it was sleeping after the final
5262 failure, which is pointless.
5264 24. Implemented tls_on_connect_ports.
5266 25. Implemented acl_smtp_predata.
5268 26. If the domain in control=submission is set empty, Exim assumes that the
5269 authenticated id is a complete email address when it generates From: or
5270 Sender: header lines.
5272 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5273 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5274 chown and chgrp in /bin and hostname in /usr/bin.
5276 28. Exim was keeping the "process log" file open after each use, just as it
5277 does for the main log. This opens the possibility of it remaining open for
5278 long periods when the USR1 signal hits a daemon. Occasional processlog
5279 errors were reported, that could have been caused by this. Anyway, it seems
5280 much more sensible not to leave this file open at all, so that is what now
5283 29. The long-running daemon process does not normally write to the log once it
5284 has entered its main loop, and it closes the log before doing so. This is
5285 so that log files can straightforwardly be renamed and moved. However,
5286 there are a couple of unusual error situations where the daemon does write
5287 log entries, and I had neglected to close the log afterwards.
5289 30. The text of an SMTP error response that was received during a remote
5290 delivery was being truncated at 512 bytes. This is too short for some of
5291 the long messages that one sometimes sees. I've increased the limit to
5294 31. It is now possible to make retry rules that apply only when a message has a
5295 specific sender, in particular, an empty sender.
5297 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5298 it possible to be selective about when SMTP synchronization is enforced.
5300 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5302 32. Implemented hosts_connection_nolog.
5304 33. Added an ACL for QUIT.
5306 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5309 35. Added mailbox_size and mailbox_filecount to appendfile.
5311 36. Added control = no_multiline_responses to ACLs.
5313 37. There was a bug in the logic of the code that waits for the clock to tick
5314 in the case where the clock went backwards by a substantial amount such
5315 that the microsecond fraction of "now" was more than the microsecond
5316 fraction of "then" (but the whole seconds number was less).
5318 38. Added support for the libradius Radius client library this is found on
5319 FreeBSD (previously only the radiusclient library was supported).
5325 1. When certain lookups returned multiple values in the form name=value, the
5326 quoting of the values was not always being done properly. Specifically:
5327 (a) If the value started with a double quote, but contained no whitespace,
5329 (b) If the value contained whitespace other than a space character (i.e.
5330 tabs or newlines or carriage returns) it was not quoted.
5331 This fix has been applied to the mysql and pgsql lookups by writing a
5332 separate quoting function and calling it from the lookup code. The fix
5333 should probably also be applied to nisplus, ibase and oracle lookups, but
5334 since I cannot test any of those, I have not disturbed their existing code.
5336 2. A hit in the callout cache for a specific address caused a log line with no
5337 reason for rejecting RCPT. Now it says "Previous (cached) callout
5338 verification failure".
5340 3. There was an off-by-one bug in the queryprogram router. An over-long
5341 return line was truncated at 256 instead of 255 characters, thereby
5342 overflowing its buffer with the terminating zero. As well as fixing this, I
5343 have increased the buffer size to 1024 (and made a note to document this).
5345 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5346 when Exim is waiting for an SMTP response from a remote server, Exim
5347 restarts its select() call on the socket, thereby resetting its timeout.
5348 This is not a problem when such interrupts are rare. Somebody set up a cron
5349 job to run exiwhat every 2 minutes, which is less than the normal select()
5350 timeout (5 or 10 minutes). This meant that the select() timeout never
5351 kicked in because it was always reset. I have fixed this by comparing the
5352 time when an interrupt arrives with the time at the start of the first call
5353 to select(). If more time than the timeout has elapsed, the interrupt is
5354 treated as a timeout.
5356 5. Some internal re-factoring in preparation for the addition of Sieve
5357 extensions (by MH). In particular, the "personal" test is moved to a
5358 separate function, and given an option for scanning Cc: and Bcc: (which is
5359 not set for Exim filters).
5361 6. When Exim created an email address using the login of the caller as the
5362 local part (e.g. when creating a From: or Sender: header line), it was not
5363 quoting the local part when it contained special characters such as @.
5365 7. Installed new OpenBSD configuration files.
5367 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5368 try to make them clearer.
5370 9. Callout options, other than the timeout value, were being ignored when
5371 verifying sender addresses in header lines. For example, when using
5373 verify = header_sender/callout=no_cache
5375 the cache was (incorrectly) being used.
5377 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5378 only the Cygwin environment.
5380 11. When return_path_on_delivery was set as a log selector, if different remote
5381 addresses in the same message used different return paths and parallel
5382 remote delivery occurred, the wrong values would sometimes be logged.
5383 (Whenever a remote delivery process finished, the return path value from
5384 the most recently started remote delivery process was logged.)
5386 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5387 lines when AUTH and/or TLS are in use. This is the "received protocol"
5388 field. Exim used to use "asmtp" for authenticated SMTP, without any
5389 indication (in the protocol name) for TLS use. Now it follows the RFC and
5390 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5391 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5392 names appear in log lines as well as in Received: header lines.
5394 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5395 extensions, and comparison tests, and to fix some bugs.
5397 14. Changes to the "personal" filter test:
5399 (1) The test was buggy in that it was just doing the equivalent of
5400 "contains" tests on header lines. For example, if a user's address was
5401 anne@some.where, the "personal" test would incorrectly be true for
5403 To: susanne@some.where
5405 This test is now done by extracting each address from the header in turn,
5406 and checking the entire address. Other tests that are part of "personal"
5407 are now done using regular expressions (for example, to check local parts
5408 of addresses in From: header lines).
5410 (2) The list of non-personal local parts in From: addresses has been
5411 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5412 taken from the Sieve specification recommendations.
5414 (3) If the message contains any header line starting with "List-" it is
5415 treated as non-personal.
5417 (4) The test for "circular" in the Subject: header line has been removed
5418 because it now seems ill-conceived.
5420 15. Minor typos in src/EDITME comments corrected.
5422 16. Installed latest exipick from John Jetmore.
5424 17. If headers_add on a router specified a text string that was too long for
5425 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5426 of string_sprintf() is now avoided.
5428 18. $message_body_size was not set (it was always zero) when running the DATA
5429 ACL and the local_scan() function.
5431 19. For the "mail" command in an Exim filter, no default was being set for
5432 the once_repeat time, causing a random time value to be used if "once" was
5433 specified. (If the value happened to be <= 0, no repeat happened.) The
5434 default is now 0s, meaning "never repeat". The "vacation" command was OK
5435 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5436 (I found it when inspecting the code).
5438 20. There is now an overall timeout for performing a callout verification. It
5439 defaults to 4 times the callout timeout, which applies to individual SMTP
5440 commands during the callout. The overall timeout applies when there is more
5441 than one host that can be tried. The timeout is checked before trying the
5442 next host. This prevents very long delays if there are a large number of
5443 hosts and all are timing out (e.g. when the network connections are timing
5444 out). The value of the overall timeout can be changed by specifying an
5445 additional sub-option for "callout", called "maxwait". For example:
5447 verify = sender/callout=5s,maxwait=20s
5449 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5450 to the end before writing, but this should make it even safer).
5452 22. Exim was forgetting that it had advertised PIPELINING for the second and
5453 subsequent messages on an SMTP connection. It was also not resetting its
5454 memory on STARTTLS and an internal HELO.
5456 23. When Exim logs an SMTP synchronization error within a session, it now
5457 records whether PIPELINING has been advertised or not.
5459 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5460 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5461 rather than long int.
5463 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5465 26. Added the never_mail option to autoreply.
5471 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5472 crash if the getsockname() call failed; this can happen if a connection is
5473 closed very soon after it is established. The problem was simply in the
5474 order in which certain operations were done, causing Exim to try to write
5475 to the SMTP stream before it had set up the file descriptor. The bug has
5476 been fixed by making things happen in the correct order.
5482 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5483 before the connection was closed, thus losing the rejection response.
5485 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5486 some early Solaris releases, but causes trouble in current releases where
5487 socklen_t is defined.
5489 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5492 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5495 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5496 that releasing the top of it at the end releases what was used for sub-
5497 expansions (unless the block got too big). However, discard this block if
5498 the first thing is a variable or header, so that we can use its block when
5499 it is dynamic (useful for very large $message_headers, for example).
5501 6. Lookups now cache *every* query, not just the most recent. A new, separate
5502 store pool is used for this. It can be recovered when all lookup caches are
5503 flushed. Lookups now release memory at the end of their result strings.
5504 This has involved some general refactoring of the lookup sources.
5506 7. Some code has been added to the store_xxx() functions to reduce the amount
5507 of flapping under certain conditions.
5509 8. log_incoming_interface used to affect only the <= reception log lines. Now
5510 it causes the local interface and port to be added to several more SMTP log
5511 lines, for example "SMTP connection from", and rejection lines.
5513 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5515 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5517 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5518 could be overwritten at the end of the current message (or the start of a
5519 new message if it was set in a HELO ACL). The value is now preserved for
5520 the duration of the SMTP connection.
5522 12. If a transport had a headers_rewrite setting, and a matching header line
5523 contained an unqualified address, that address was qualified, even if it
5524 did not match any rewriting rules. The underlying bug was that the values
5525 of the flags that permit the existence of unqualified sender and recipient
5526 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5527 non-local messages, and by -bnq for local messages) were not being
5528 preserved with the message after it was received.
5530 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5531 "next input=" as part of the text comprising the host identity instead of
5532 the correct text. The code was using the same buffer for two different
5533 strings. However, depending on which order the printing function evaluated
5534 its arguments, the bug did not always show up. Under Linux, for example, my
5535 test suite worked just fine.
5537 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5538 doesn't work with some older versions of Perl. It has been changed to "my",
5539 which in any case is probably the better facility to use.
5541 15. A really picky compiler found some instances of statements for creating
5542 error messages that either had too many or two few arguments for the format
5545 16. The size of the buffer for calls to the DNS resolver has been increased
5546 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5547 for addresses that have a lot of PTR records. This alleviates a problem; it
5548 does not fully solve it.
5550 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5551 buffer now truncates the list and logs the incident, which is the same
5552 action as happens when Exim is looking up a host name and its aliases.
5553 Previously in this situation something unpredictable would happen;
5554 sometimes it was "internal error: store_reset failed".
5556 18. If a server dropped the connection unexpectedly when an Exim client was
5557 using GnuTLS and trying to read a response, the client delivery process
5558 crashed while trying to generate an error log message.
5560 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5561 string, for example:
5563 warn message = H1: something\nH2: something
5565 the text was added as a single header line from Exim's point of view
5566 though it ended up OK in the delivered message. However, searching for the
5567 second and subsequent header lines using $h_h2: did not work. This has been
5568 fixed. Similarly, if a system filter added multiple headers in this way,
5569 the routers could not see them.
5571 20. Expanded the error message when iplsearch is called with an invalid key to
5572 suggest using net-iplsearch in a host list.
5574 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5575 ACLs are no longer actually imposed (and a message to that effect is
5578 22. If a "gecos" field in a passwd entry contained escaped characters, in
5579 particular, if it contained a \" sequence, Exim got it wrong when building
5580 a From: or a Sender: header from that name. A second bug also caused
5581 incorrect handling when an unquoted " was present following a character
5582 that needed quoting.
5584 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5585 was not being matched caselessly.
5587 24. Arranged for all hyphens in the exim.8 source to be escaped with
5590 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5591 properly. Recipient callout cache records were still being keyed to include
5592 the sender, even when use_sender was set false. This led to far more
5593 callouts that were necessary. The sender is no longer included in the key
5594 when use_sender is false.
5596 26. Added "control = submission" modifier to ACLs.
5598 27. Added the ${base62d: operator to decode base 62 numbers.
5600 28. dnsdb lookups can now access SRV records.
5602 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5603 the configuration file.
5605 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5606 (-v) mode. This makes the output for a verbose queue run more intelligible.
5608 31. Added a use_postmaster feature to recipient callouts.
5610 32. Added the $body_zerocount variable, containing the number of binary zero
5611 bytes in the message body.
5613 33. The time of last modification of the "new" subdirectory is now used as the
5614 "mailbox time last read" when there is a quota error for a maildir
5617 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5619 35. Added +ignore_unknown as a special item in host lists.
5621 36. Code for decoding IPv6 addresses in host lists is now included, even if
5622 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5623 address was recognized as an IP address, but was then not correctly decoded
5624 into binary, causing unexpected and incorrect effects when compared with
5631 1. Very minor rewording of debugging text in manualroute to say "list of
5632 hosts" instead of "hostlist".
5634 2. If verify=header_syntax was set, and a header line with an unqualified
5635 address (no domain) and a large number of spaces between the end of the
5636 name and the colon was received, the reception process suffered a buffer
5637 overflow, and (when I tested it) crashed. This was caused by some obsolete
5638 code that should have been removed. The fix is to remove it!
5640 3. When running in the test harness, delay a bit after writing a bounce
5641 message to get a bit more predictability in the log output.
5643 4. Added a call to search_tidyup() just before forking a reception process. In
5644 theory, someone could use a lookup in the expansion of smtp_accept_max_
5645 per_host which, without the tidyup, could leave open a database connection.
5647 5. Added the variables $recipient_data and $sender_data which get set from a
5648 lookup success in an ACL "recipients" or "senders" condition, or a router
5649 "senders" option, similar to $domain_data and $local_part_data.
5651 6. Moved the writing of debug_print from before to after the "senders" test
5654 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5655 problems for message scanning, either using a data ACL, or using
5656 local_scan() because the Received: header was not generated till after they
5657 were called (in order to set the time as the time of reception completion).
5658 I have revised the way this works. The header is now generated after the
5659 body is received, but before the ACL or local_scan() are called. After they
5660 are run, the timestamp in the header is updated.
5666 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5667 before starting a queue runner without re-exec. This happened only when
5668 deliver_drop_privilege was set or when the Exim user was set to root. The
5669 effect of the bug was that timeouts during subsequent deliveries caused
5670 crashes instead of being properly handled. The handler is now left at its
5671 default (and expected) setting.
5673 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5674 message, again when deliver_drop_privilege is set or Exim is run as root.
5675 The bug described in (1) was not present in this case, but the tidying up
5676 of the other signals was missing. I have made the two cases consistent.
5678 3. The ignore_target_hosts setting on a manualroute router was being ignored
5679 for hosts that were looked up using the /MX notation.
5681 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5684 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5685 operated on the sender address. After changing the $sender_address to <>
5686 for the sender address verify, Exim was re-instated it as the original
5687 (before rewriting) address, but remembering that it had rewritten it, so it
5688 wasn't rewriting it again. This bug also had the effect of breaking the
5689 sender address verification caching when the sender address was rewritten.
5691 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5692 This has been changed so that if the ip literal address matches
5693 ignore_target_hosts, the router declines.
5695 7. Added expansion conditions match_domain, match_address, and match_local_
5696 part (NOT match_host).
5698 8. The placeholder for the Received: header didn't have a length field set.
5700 9. Added code to Exim itself and to exim_lock to test for a specific race
5701 condition that could lead to file corruption when using MBX delivery. The
5702 issue is with the lockfile that is created in /tmp. If this file is removed
5703 after a process has opened it but before that process has acquired a lock,
5704 there is the potential for a second process to recreate the file and also
5705 acquire a lock. This could lead to two Exim processes writing to the file
5706 at the same time. The added code performs the same test as UW imapd; it
5707 checks after acquiring the lock that its file descriptor still refers to
5708 the same named file.
5710 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5711 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5714 11. Added the smtp_active_hostname option. If used, this will typically be made
5715 to depend on the incoming interface address. Because $interface_address is
5716 not set up until the daemon has forked a reception process, error responses
5717 that can happen earlier (such as "too many connections") no longer contain
5720 12. If an expansion in a condition on a "warn" statement fails because a lookup
5721 defers, the "warn" statement is abandoned, and the next ACL statement is
5722 processed. Previously this caused the whole ACL to be aborted.
5724 13. Added the iplsearch lookup type.
5726 14. Added ident_timeout as a log selector.
5728 15. Added tls_certificate_verified as a log selector.
5730 16. Added a global option tls_require_ciphers (compare the smtp transport
5731 option of the same name). This controls incoming TLS connections.
5733 17. I finally figured out how to make tls_require_ciphers do a similar thing
5734 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5735 before starting the TLS session.
5737 18. Tabs are now shown as \t in -bP output.
5739 19. If the log selector return_path_on_delivery was set, Exim crashed when
5740 bouncing a message because it had too many Received: header lines.
5742 20. If two routers both had headers_remove settings, and the first one included
5743 a superfluous trailing colon, the final name in the first list and the
5744 first name in the second list were incorrectly joined into one item (with a
5745 colon in the middle).
5751 1. Added -C and -D options to the exinext utility, mainly to make it easier
5752 to include in the automated testing, but these could be helpful when
5753 multiple configurations are in use.
5755 2. The exinext utility was not formatting the output nicely when there was
5756 an alternate port involved in the retry record key, nor when there was a
5757 message id as well (for retries that were specific to a specific message
5758 and a specific host). It was also confused by IPv6 addresses, because of
5759 the additional colons they contain. I have fixed the IPv4 problem, and
5760 patched it up to do a reasonable job for IPv6.
5762 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5763 delivery, the log line now contains "pipelined" if PIPELINING was used.
5765 4. An SMTP transport process used to panic and die if the bind() call to set
5766 an explicit outgoing interface failed. This has been changed; it is now
5767 treated in the same way as a connect() failure.
5769 5. A reference to $sender_host_name in the part of a conditional expansion
5770 that was being skipped was still causing a DNS lookup. This no longer
5773 6. The def: expansion condition was not recognizing references to header lines
5774 that used bh_ and bheader_.
5776 7. Added the _cache feature to named lists.
5778 8. The code for checking quota_filecount in the appendfile transport was
5779 allowing one more file than it should have been.
5781 9. For compatibility with Sendmail, the command line option
5789 and sets the incoming protocol and host name (for trusted callers). The
5790 host name and its colon can be omitted when only the protocol is to be set.
5791 Note the Exim already has two private options, -pd and -ps, that refer to
5792 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5793 "s", but I don't think that's a major issue.
5795 10. A number of refactoring changes to the code, none of which should affect
5798 (a) The number of logging options was getting close to filling up the
5799 32-bit word that was used as a bit map. I have split them into two classes:
5800 those that are passed in the argument to log_write(), and those that are
5801 only ever tested independently outside of that function. These are now in
5802 separate 32-bit words, so there is plenty of room for expansion again.
5803 There is no change in the user interface or the logging behaviour.
5805 (b) When building, for example, log lines, the code previously used a
5806 macro that called string_cat() twice, in order to add two strings. This is
5807 not really sufficiently general. Furthermore, there was one instance where
5808 it was actually wrong because one of the argument was used twice, and in
5809 one call a function was used. (As it happened, calling the function twice
5810 did not affect the overall behaviour.) The macro has been replaced by a
5811 function that can join an arbitrary number of extra strings onto a growing
5814 (c) The code for expansion conditions now uses a table and a binary chop
5815 instead of a serial search (which was left over from when there were very
5816 few conditions). Also, it now recognizes conditions like "pam" even when
5817 the relevant support is not compiled in: a suitably worded error message is
5818 given if an attempt is made to use such a condition.
5820 11. Added ${time_interval:xxxxx}.
5822 12. A bug was causing one of the ddress fields not to be passed back correctly
5823 from remote delivery subprocesses. The field in question was not being
5824 subsequently used, so this caused to problems in practice.
5826 13. Added new log selectors queue_time and deliver_time.
5828 14. Might have fixed a bug in maildirsizefile handling that threw up
5829 "unexpected character" debug warnings, and recalculated the data
5830 unnecessarily. In any case, I expanded the warning message to give more
5833 15. Added the message "Restricted characters in address" to the statements in
5834 the default ACL that block characters like @ and % in local parts.
5836 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5837 Three changes have been made:
5839 (a) There was a serious bug; a negative response to MAIL caused the whole
5840 recipient domain to be cached as invalid, thereby blocking all messages
5841 to all local parts at the same domain, from all senders. This bug has
5842 been fixed. The domain is no longer cached after a negative response to
5843 MAIL if the sender used is not empty.
5845 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5848 (c) A new callout option, "use_sender" has been added for people who want
5849 the modified behaviour.
5855 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5858 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5859 indeed breaks things for older releases.
5861 3. Added additional logging to the case where there is a problem reading data
5862 from a filter that is running in a subprocess using a pipe, in order to
5863 try to track down a specific problem.
5865 4. Testing facility fudge: when running in the test harness and attempting
5866 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5867 getting "No route to host". Convert this to a timeout.
5869 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5872 6. Some OS don't have socklen_t but use size_t instead. This affects the
5873 fifth argument of getsockopt() amongst other things. This is now
5874 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5875 can be set for individual OS. I have set it for SunOS5, OSF1, and
5876 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5877 some earlier ones do not.
5879 7. Change 4.30/15 was not doing the test caselessly.
5881 8. The standard form for an IPv6 address literal was being rejected by address
5882 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5883 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5884 this, as well as the form without the "IPv6" on the front (but only when
5885 address literals are enabled, of course).
5887 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5889 10. Exim crashed if a message with an empty sender address specified by -f
5890 encountered a router with an errors_to setting. This could be provoked only
5891 by a command such as
5895 where an empty string was supplied; "<>" did not hit this bug.
5897 11. Installed PCRE release 4.5.
5899 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5900 remained set. It is now erased.
5902 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5903 times from message ids (which are base 36 rather than the normal 62).
5905 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5906 were being counted as actual protocol errors, and logged if the log
5907 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5908 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5909 and DATA following a set of rejected RCPTs do not count as protocol errors.
5910 In other words, Exim assumes they were pipelined, though this may not
5911 actually be the case. Of course, in all cases the client gets an
5912 appropriate error code.
5914 15. If a lookup fails in an ACL condition, a message about the failure may
5915 be available; it is used if testing the ACL cannot continue, because most
5916 such messages specify what the cause of the deferral is. However, some
5917 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5918 that caused an old message to be retained and used if a later statement
5919 caused a defer, replacing the real cause of the deferral.
5921 16. If an IP address had so many PTR records that the DNS lookup buffer
5922 was not large enough to hold them, Exim could crash while trying to process
5923 the truncated data. It now detects and logs this case.
5925 17. Further to 4.21/58, another change has been made: if (and only if) the
5926 first line of a message (the first header line) ends with CRLF, a bare LF
5927 in a subsequent header line has a space inserted after it, so as not to
5928 terminate the header.
5930 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5931 unnecessarily, used atoi() instead of strtol(), and didn't check the
5932 termination when getting file sizes from file names by regex.
5934 19. Completely re-implemented the support for maildirsize files, in the light
5935 of a number of problems with the previous contributed implementation
5936 (4.30/29). In particular:
5938 . If the quota is zero, the maildirsize file is maintained, but no quota is
5941 . If the maildir directory does not exist, it is created before any attempt
5942 to write a maildirsize file.
5944 . The quota value in the file is just a cache; if the quota is changed in
5945 the transport, the new value overrides.
5947 . A regular expression is available for excluding directories from the
5950 20. The autoreply transport checks the characters in options that define the
5951 message's headers; it allows continued headers, but it was checking with
5952 isspace() after an embedded newline instead of explicitly looking for a
5955 21. If all the "regular" hosts to which an address was routed had passed their
5956 expiry times, and had not reached their retry times, the address was
5957 bounced, even if fallback hosts were defined. Now Exim should go on to try
5960 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5961 equivalent code in the SMTP transport. Some hosts send humungous responses
5962 to HELO/EHLO, more than 1024 it seems.
5964 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5965 gives compiler warnings in some environments. I've now done it "properly",
5968 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5969 (because of problems with the built-in one) was declared to return uschar *
5970 instead of char *, causing compiler failure.
5972 25. Fixed a file descriptor leak when processing alias/forward files.
5974 26. Fixed a minor format string issue in dbfn.c.
5976 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5978 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5979 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5982 29. When a sender address is verified, it is cached, to save repeating the test
5983 when there is more than one recipient in a message. However, when the
5984 verification involves a callout, it is possible for different callout
5985 options to be set for different recipients. It is too complicated to keep
5986 track of this in the cache, so now Exim always runs a verification when a
5987 callout is required, relying on the callout cache for the optimization.
5988 The overhead is duplication of the address routing, but this should not be
5991 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5992 to be verified with callout=postmaster, and the main callout worked but the
5993 postmaster check failed, the verification correctly failed. However, if a
5994 subsequent RCPT command asked for sender verification *without* the
5995 postmaster check, incorrect caching caused this verification also to fail,
5998 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5999 it was not caching the DNS options (qualify_single, search_parents) that
6000 were used when the lookup failed. A subsequent lookup with different
6001 options therefore always gave the same answer, though there were cases
6002 where it should not have. (Example: a "domains = !$mx_any" option on a
6003 dnslookup router: the "domains" option is always processed without any
6004 widening, but the router might have qualify_single set.) Now Exim uses the
6005 cached value only when the same options are set.
6007 32. Added John Jetmore's "exipick" utility to the distribution.
6009 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6010 than a timeout (e.g. a certificate is required, and is not provided), an
6011 Exim server now closes the connection immediately. Previously it waited for
6012 the client to close - but if the client is SSL, it seems that they each
6013 wait for each other, leading to a delay before one of them times out.
6015 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6016 maintained 0.8.x compatibility because I don't think many are using it, and
6017 it is clearly obsolete.
6019 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6022 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6023 client certificate was expired. A simple patch fixes this, though I don't
6024 understand the full logic of why the verify callback is called multiple
6027 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6028 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6029 which causes problems with some clients (such as the Certicom SSL Plus
6030 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6031 disables the coutermeasure allowing Eudora to connect."
6033 38. Exim was not checking that a write() to a log file succeeded. This could
6034 lead to Bad Things if a log got too big, in particular if it hit a file
6035 size limit. Exim now panics and dies if it cannot write to a log file, just
6036 as it does if it cannot open a log file.
6038 39. Modified OS/Makefile-Linux so that it now contains
6040 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6042 The two -D definitions ensure that Exim is compiled with large file
6043 support, which makes it possible to handle log files that are bigger than
6046 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6047 instance) a domain was checked against a named list that involved a lookup,
6048 causing $domain_data to be set, then another domain was checked against the
6049 same list, then the first domain was re-checked, the value of $domain_data
6050 after the final check could be wrong. In particular, if the second check
6051 failed, it could be set empty. This bug probably also applied to
6054 41. The strip_trailing_dot option was not being applied to the address given
6055 with the -f command-line option.
6057 42. The code for reading a message's header from the spool was incrementing
6058 $received_count, but never initializing it. This meant that the value was
6059 incorrect (doubled) while delivering a message in the same process in which
6060 it was received. In the most common configuration of Exim, this never
6061 happens - a fresh exec is done - but it can happen when
6062 deliver_drop_privilege is set.
6064 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6065 it now includes up to 150 characters of the unexpected data in the log
6068 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6069 and building data strings. The size of both of these buffers was 10 000
6070 bytes - far larger than anybody would *ever* want, thought I. Needless to
6071 say, somebody hit the limit. I have increased the maximum line length to
6072 20 000 and the maximum data length of concatenated lines to 100 000. I have
6073 also fixed two bugs, because there was no checking on these buffers. Tsk,
6074 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6075 buffer is too small.
6077 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6078 lsearch lookups. Now it does.
6080 46. When parsing a route_list item in a manualroute router, a fixed-length
6081 buffer was used for the list of hosts. I made this 1024 bytes long,
6082 thinking that nobody would ever have a list of hosts that long. Wrong.
6083 Somebody had a whole pile of complicated expansion conditions, and the
6084 string was silently truncated, leading to an expansion error. It turns out
6085 that it is easier to change to an unlimited length (owing to other changes
6086 that have happened since this code was originally written) than to build
6087 structure for giving a limitation error. The length of the item that
6088 expands into the list of hosts is now unlimited.
6090 47. The lsearch lookup could not handle data where the length of text line was
6091 more than 4095 characters. Such lines were truncated, leading to shortened
6092 data being returned. It should now handle lines of any length.
6094 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6095 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6098 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6099 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6100 no longer happens in comment lines. A list of replacements is now placed
6101 at the head of all of the source files, except those whose only change is
6102 to replace PERL_COMMAND in the very first #! line.
6104 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6105 messages on the queue, with a bottom-up merge sort, using code contributed
6106 by Michael Haardt. This should make operations like -bp somewhat faster on
6107 large queues. It won't affect queue runners, except when queue_run_in_order
6110 51. Installed eximstats 1.31 in the distribution.
6112 52. Added support for SRV lookups to the dnslookup router.
6114 53. If an ACL referred to $message_body or $message_body_end, the value was not
6115 reset for any messages that followed in the same SMTP session.
6117 54. The store-handling optimization for building very long strings was not
6118 differentiating between the different store pools. I don't think this
6119 actually made any difference in practice, but I've tidied it.
6121 55. While running the routers to verify a sender address, $sender_address
6122 was still set to the sender address. This is wrong, because when routing to
6123 send a bounce to the sender, it would be empty. Therefore, I have changed
6124 it so that, while verifying a sender address, $sender_address is set to <>.
6125 (There is no change to what happens when verifying a recipient address.)
6127 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6128 target A or AAAA records (if not already returned) without resetting the
6129 qualify_single or search_parents options of the DNS resolver. These are
6130 inappropriate in this case because the targets of MX and SRV records must
6131 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6132 target that, when qualified, matched something in the local domain. These
6133 two options are now turned off when doing these lookups.
6135 57. It seems that at least some releases of Reiserfs (which does not have the
6136 concept of a fixed number of inodes) returns zero and not -1 for the
6137 number of available inodes. This interacted badly with check_spool_inodes,
6138 which assumed that -1 was the "no such thing" setting. What I have done is
6139 to check that the total number of inodes is greater than zero before doing
6140 the test of how many are available.
6142 58. When a "warn" ACL statement has a log_message modifier, the message is
6143 remembered, and not repeated. This is to avoid a lot of repetition when a
6144 message has many recipients that cause the same warning to be written.
6145 However, Exim was preserving the list of already written lines for an
6146 entire SMTP session, which doesn't seem right. The memory is now reset if a
6147 new message is started.
6149 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6150 debugging output unless log_rewrite was also set.
6152 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6153 of (int)(handle) when we know that handle contains (void *)(-1).
6155 61. The Exim daemon panic-logs an error return when it closes the incoming
6156 connection. However "connection reset by peer" seems to be common, and
6157 isn't really an error worthy of noting specially, so that particular error
6160 62. When Exim is trying to find all the local interfaces, it used to panic and
6161 die if the ioctl to get the interface flags failed. However, it seems that
6162 on at least one OS (Solaris 9) it is possible to have an interface that is
6163 included in the list of interfaces, but for which you get a failure error
6164 for this call. This happens when the interface is not "plumbed" into a
6165 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6166 failure of the "get flags" call assumes that the interface is down.
6168 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6169 makes life easier for people who are doing arithmetic on fields extracted
6170 from dates, where you often get leading zeros that should not be
6171 interpreted as octal.
6173 64. Added qualify_domain to the redirect router, to override the global
6176 65. If a pathologically long header line contained very many addresses (the
6177 report of this problem mentioned 10 000) and each of them was rewritten,
6178 Exim could use up a very large amount of memory. (It kept on making new
6179 copies of the header line as it rewrote, and never released the old ones.)
6180 At the expense of a bit more processing, the header rewriting function has
6181 been changed so that it no longer eats memory in this way.
6183 66. The generation of the Received: header has been moved from the time that a
6184 message starts to be received, to the time that it finishes. The timestamp
6185 in the Received: header should now be very close to that of the <= log
6186 line. There are two side-effects of this change:
6188 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6189 logged header lines no longer include the local Received: line, because
6190 it has not yet been created. The same applies to a copy of the message
6191 that is returned to a non-SMTP sender when a message is rejected.
6193 (b) When a filter file is tested using -bf, no additional Received: header
6194 is added to the test message. After some thought, I decided that this
6197 This change does not affect the value of $received_for. It is still set
6198 after address rewriting, but before local_scan() is called.
6200 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6202 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6203 gave an unhelpful panic error message, and a defer error. I have managed to
6204 change this behaviour so that it now rejects any supplied certificate,
6205 which seems right, as the list of acceptable certificates is empty.
6207 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6208 gave an unhelpful defer error. I have not managed to make this reject any
6209 supplied certificates, but the error message it gives is "no certificate
6210 supplied", which is not helpful.
6212 70. exigrep's output now also includes lines that are not associated with any
6213 message, but which match the given pattern. Implemented by a patch from
6214 Martin Sluka, which also tidied up the Perl a bit.
6216 71. Recipient callout verification, like sender verification, was using <> in
6217 the MAIL FROM command. This isn't really the right thing, since the actual
6218 sender may affect whether the remote host accepts the recipient or not. I
6219 have changed it to use the actual sender in the callout; this means that
6220 the cache record is now keyed on a recipient/sender pair, not just the
6221 recipient address. There doesn't seem to be a real danger of callout loops,
6222 since a callout by the remote host to check the sender would use <>.
6223 [SEE ABOVE: changed after hitting problems.]
6225 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6226 temporary errors. However, in the case of such a code being given after
6227 the end of a data transmission (i.e. after ".") Exim was failing to write
6228 a retry record for the message. (Yes, there was some broken host that was
6229 actually sending 8xx at this point.)
6231 73. An unknown lookup type in a host list could cause Exim to panic-die when
6232 the list was checked. (An example that provoked this was putting <; in the
6233 middle of a list instead of at the start.) If this happened during a DATA
6234 ACL check, a -D file could be left lying around. This kind of configuration
6235 error no longer causes Exim to die; instead it causes a defer error. The
6236 incident is still logged to the main and panic logs.
6238 74. Buglet left over from Exim 3 conversion. The message "too many messages
6239 in one connection" was written to the rejectlog but not the mainlog, except
6240 when address rewriting (yes!) was being logged.
6242 75. Added write_rejectlog option.
6244 76. When a system filter was run not as root (that is, when system_filter_user
6245 was set), the values of the $n variables were not being returned to the
6246 main process; thus, they were not subsequently available in the $sn
6249 77. Added +return_path_on_delivery log selector.
6251 78. A connection timeout was being treated differently from recipients deferred
6252 when testing hosts_max_try with a message that was older than the host's
6253 retry timeout. (The host should not be counted, thus allowing all hosts to
6254 be tried at least once before bouncing.) This may have been the cause of an
6255 occasionally reported bug whereby a message would remain on the queue
6256 longer than the retry timeout, but would be bounced if a delivery was
6257 forced. I say "may" because I never totally pinned down the problem;
6258 setting up timeout/retry tests is difficult. See also the next item.
6260 79. The ultimate address timeout was not being applied to errors that involved
6261 a combination of host plus message (for example, a timeout on a MAIL
6262 command). When an address resolved to a number of possible hosts, and they
6263 were not all tried for each delivery (e.g. because of hosts_max_try), a
6264 message could remain on the queue longer than the retry timeout.
6266 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6269 81. Fixed an obscure SMTP outgoing bug which required at least the following
6270 conditions: (a) there was another message waiting for the same server;
6271 (b) the server returned 5xx to all RCPT commands in the first message so
6272 that the message was not completed; (c) the server dropped the connection
6273 or gave a negative response to the RSET that Exim sends to abort the
6274 transaction. The observed case was a dropped connection after DATA that had
6275 been sent in pipelining mode. That is, the server had advertised PIPELINING
6276 but was not implementing it correctly. The effect of the bug was incorrect
6277 behaviour, such as trying another host, and this could lead to a crash.
6283 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6284 and daemon.c were passed as pointers to ints; they should have been
6285 pointers to socklen_t variables (which are typically unsigned ints).
6287 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6290 3. Fixed a really odd bug that affected only the testing scheme; patching a
6291 certain fixed string in the binary changed the value of another string that
6292 happened to be identical to the end of the original first string.
6294 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6295 name", it returns that address as the IP address. On some operating
6296 systems (e.g. Solaris), it also passes back the IP address string as the
6297 "host name". However, on others (e.g. Linux), it passes back an empty
6298 string. Exim wasn't checking for this, and was changing the host name to an
6299 empty string, assuming it had been canonicalized.
6301 5. Although rare, it is permitted to have more than one PTR record for a given
6302 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6303 all the names associated with an address, because they do in Solaris.
6304 However, it seems that they do not in Linux for data that comes from the
6305 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6306 I found this out when I moved to a new Linux workstation and tried to run
6307 the Exim test suite.
6309 To get round this problem I have changed the code so that it now does its
6310 own call to the DNS to look up PTR records when searching for a host name.
6311 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6312 addresses that are only in /etc/hosts are still found.
6314 This behaviour is, however, controlled by an option called host_lookup_
6315 order, which defaults to "bydns:byaddr". If people want to use the other
6316 order, or indeed, just use one or the other means of lookup, they can
6317 specify it in this variable.
6319 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6320 some operating systems, this comes back from gethostbyaddr() as an empty
6321 string, and this is what Exim used to test for. However, it seems that in
6322 other systems, "." is yielded. Exim now tests for this case too.
6324 7. The values of check_spool_space and check_log_space are now held internally
6325 as a number of kilobytes instead of an absolute number of bytes. If a
6326 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6327 kilobyte. This means that much larger values can be stored.
6329 8. Exim monitor: an attempt to get the action menu when not actually pointing
6330 at a message produces an empty menu entitled "No message selected". This
6331 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6332 no entries in it ("Shell widget menu has zero width and/or height"). So I
6333 have added a single, blank menu entry in this case.
6335 9. Added ${quote_local_part.
6337 10. MIME decoding is now applied to the contents of Subject: header lines when
6340 11. Now that a reference to $sender_host_address automatically causes a reverse
6341 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6342 host lookup before query-style lookups in lists that might use this
6343 variable. This has therefore been abolished, and the "net-" prefix is no
6344 longer necessary for query-style lookups.
6346 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6347 have been a typo for LFLAGS, so it has been changed.
6349 13. The install script calls Exim with "-C /dev/null" in order to find the
6350 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6351 to be output. However, since Exim outputs its version number before the
6352 error, it didn't break the script. It just looked ugly. I fixed this by
6353 always allowing "-C /dev/null" if the caller is root.
6355 14. Ignore overlarge ACL variable number when reading spool file - insurance
6356 against a later release with more variables having written the file.
6358 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6359 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6360 this, as well as the form without the "IPv6" on the front.
6362 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6363 OS/Makefile-Darwin file.
6365 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6366 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6368 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6369 variable. However, some OS use ints for inodes. I've added cast to long int
6370 to get rid of the compiler warning.
6372 19. I had forgotten to lock out "/../" in configuration file names when
6373 ALT_CONFIG_PREFIX was set.
6375 20. Routers used for verification do not need to specify transports. However,
6376 if such a router generated a host list, and callout was configured, Exim
6377 crashed, because it could not find a port number from the (non-existent)
6378 transport. It now assumes port 25 in this circumstance.
6380 21. Added the -t option to exigrep.
6382 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6383 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6384 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6385 them is set, LOOKUP_LSEARCH is forced.
6387 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6389 24. Added sender and host information to the "rejected by local_scan()" log
6390 line; previously there was no indication of these.
6392 25. Added .include_if_exists.
6394 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6395 Linux. It turns out that not all file systems support this. Apparently some
6396 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6397 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6398 not supported on the file descriptor, is now ignored when Exim is trying to
6399 sync a directory. This applies only to Linux.
6401 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6403 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6404 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6407 29. Added support for maildirsize files from supplied patch (modified a bit).
6409 30. The use of :fail: followed by an empty string could lead Exim to respond to
6410 sender verification failures with (e.g.):
6412 550 Verification failed for <xxx>
6413 550 Sender verify failed
6415 where the first response line was missing the '-' that indicates it is not
6416 the final line of the response.
6418 31. The loop for finding the name of the user that called Exim had a hardwired
6419 limit of 10; it now uses the value of finduser_retries, which is used for
6420 all other user lookups.
6422 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6425 33. Exim was neglecting to zero errno before one call of strtol() when
6426 expanding a string and expecting an integer value. On some systems this
6427 resulted in spurious "integer overflow" errors. Also, it was casting the
6428 result into an int without checking.
6430 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6431 did not work. The code looks as if it has *never* worked, though it appears
6432 to have been documented since at least release 1.62. I have made it work.
6434 35. The "timeout_DNS" error in retry rules, also documented since at least
6435 1.62, also never worked. As it isn't clear exactly what this means, and
6436 clearly it isn't a major issue, I have abolished the feature by treating it
6437 as "timeout", and writing a warning to the main and panic logs.
6439 36. The display of retry rules for -brt wasn't always showing the error code
6442 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6443 timeout_connect_A, timeout_connect_MX.
6445 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6446 to the empty sender.
6448 39. The daemon was not analysing the content of -oX till after it had closed
6449 stderr and disconnected from the controlling terminal. This meant that any
6450 syntax errors were only noted on the panic log, and the return code from
6451 the command was 0. By re-arranging the code a little, I've made the
6452 decoding happen first, so such errors now appear on stderr, and the return
6453 code is 1. However, the actual setting up of the sockets still happens in
6454 the disconnected process, so errors there are still only recorded on the
6457 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6458 connections (as happens on some IP stacks) was logged at start up time as
6459 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6460 it from "IPv6 and IPv4", which means that two separate sockets are being
6463 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6464 says whether AF_INET or AF_INET6 was passed as an argument.
6466 42. Exiwhat output was messed up when time zones were included in log
6469 43. Exiwhat now gives more information about the daemon's listening ports,
6470 and whether -tls-on-connect was used.
6472 44. The "port" option of the smtp transport is now expanded.
6474 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6475 silently ignored. Now an error message is written to the main and panic
6478 46. There's a new ACL modifier called "logwrite" which writes to a log file
6479 as soon as it is encountered.
6481 47. Added $local_user_uid and $local_user_gid at routing time.
6483 48. Exim crashed when trying to verify a sender address that was being
6486 49. Exim was recognizing only a space character after ".include". It now also
6487 recognizes a tab character.
6489 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6490 extracting the relevant information from the specification. The man page no
6491 longer contains scrambled data for the -d option, and I've added a section
6492 at the front about calling Exim under different names.
6494 51. Added "extra_headers" argument to the "mail" command in filter files.
6496 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6499 53. Installed eximstats 1.29.
6501 54. Added transport_filter_timeout as a generic transport option.
6503 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6504 Cc: header lines. This was required by RFC 822, but it not required by RFC
6507 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6508 incoming messages that did not have them. Now it does so only if the
6509 message originates locally, that is, if there is no associated remote host
6510 address. When Resent- header lines are present, this applies to the Resent-
6511 lines rather than the non-Resent- lines.
6513 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6514 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6516 58. Messages for configuration errors now include the name of the main
6517 configuration file - useful now that there may be more than one file in a
6518 list (.included file names were always shown).
6520 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6521 for those rare installations that do not start the daemon as root or run it
6522 setuid root. I've cut out the call to initgroups() if the daemon is not
6525 60. The Exim user and group can now be bound into the binary as text strings
6526 that are looked up at the start of Exim's processing.
6528 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6530 62. Added $mailstore_basename variable.
6532 63. Installed patch to sieve.c from Michael Haardt.
6534 64. When Exim failed to open the panic log after failing to open the main log,
6535 the original message it was trying to log was written to stderr and debug
6536 output, but if they were not available (the usual case in production), it
6537 was lost. Now it is written to syslog before the two lines that record the
6538 failures to open the logs.
6540 65. Users' Exim filters run in subprocesses under the user's uid. It is
6541 possible for a "deliver" command or an alias in a "personal" command to
6542 provoke an address rewrite. If logging of address rewriting is configured,
6543 this fails because the process is not running as root or exim. There may be
6544 a better way of dealing with this, but for the moment (because 4.30 needs
6545 to be released), I have disabled address rewrite logging when running a
6546 filter in a non-root, non-exim process.
6552 1. The buildconfig auxiliary program wasn't quoting the value set for
6553 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6554 not defined. This bug was masked in 4.22 by the effect that was fixed in
6557 2. Some messages that were rejected after a message id was allocated were
6558 shown as "incomplete" by exigrep. It no longer does this for messages that
6559 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6561 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6562 have allow_domain_literals set, the ID did not get logged in the <= line.
6563 Domain literals are now always recognized in Message-ID: header lines.
6565 4. The first argument for a ${extract expansion item is the key name or field
6566 number. Leading and trailing spaces in this item were not being ignored,
6567 causing some misleading effects.
6569 5. When deliver_drop_privilege was set, single queue runner processes started
6570 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6571 same command in the process it spins off) were not dropping privilege.
6573 6. When the daemon running as "exim" started a queue runner, it always
6574 re-executed Exim in the spun-off process. This is a waste of effort when
6575 deliver_drop_privilege is set. The new process now just calls the
6576 queue-runner function directly.
6582 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6585 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6586 ignored. Though the use of -oP was forcing the writing of a pid file, it
6587 was always written to the default place.
6589 3. If the message "no IP address found for host xxxx" is generated during
6590 incoming verification, it is now followed by identification of the incoming
6591 connection (so you can more easily find what provoked it).
6593 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6595 5. Added some features to "harden" Exim a bit more against certain attacks:
6597 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6598 be put in Local/Makefile. This is like the never_users runtime option,
6599 but it cannot be overridden. The default setting is "root".
6601 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6602 prefix string with which any file named in a -C command line option
6605 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6606 is retained for -C and -D only if the caller of Exim is root. Without
6607 it, the exim user may also use -C and -D and retain privilege.
6609 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6610 command line option is disabled.
6612 6. Macro names set by the -D option must start with an upper case letter, just
6613 like macro names defined in the configuration file.
6615 7. Added "dereference=" facility to LDAP.
6617 8. Two instances of the typo "uknown" in the source files are fixed.
6619 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6620 the Configure-Makefile script screwed up while processing it.
6622 10. Incorporated PCRE 4.4.
6624 11. The SMTP synchronization check was not operating right at the start of an
6625 SMTP session. For example, it could not catch a HELO sent before the client
6626 waited for the greeting. There is now a check for outstanding input at the
6627 point when the greeting is written. Because of the duplex, asynchronous
6628 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6629 way, but not yet received, when the check is performed.
6631 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6632 on TCP/IP sockets, because this apparently causes some broken clients to
6635 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6636 unchanged) from the Cygwin maintainer.
6638 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6639 was supported instead of testing for mbx. Effectively a typo.
6641 15. The spa authenticator server code was not checking that the input it
6642 received was valid base64.
6644 16. The debug output line for the "set" modifier in ACLs was not showing the
6645 name of the variable that was being set.
6647 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6649 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6650 lookup on its own. Something else was needed to trigger the lookup. For
6651 example, a match in host_lookup or the need for a host name in a host list.
6652 Now, if $sender_host_name is referenced and the host name has not yet been
6653 looked up, a lookup is performed. If the lookup fails, the variable remains
6654 empty, and $host_lookup_failed is set to "1".
6656 19. Added "eqi" as a case-independent comparison operator.
6658 20. The saslauthd authentication condition could segfault if neither service
6659 nor realm was specified.
6661 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6662 error message that was logged was misleading, and incoming SMTP
6663 connections were dropped. The message is now more accurate, and temporary
6664 errors are given to SMTP connections.
6666 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6667 (except RSET) with a 421 error, until QUIT is received. However, it was
6668 failing to send a response to QUIT.
6670 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6671 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6672 ACL is now run after the helo_try_verify_hosts code.
6674 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6675 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6676 case-independent, so other case variants are also recognized). Apparently
6677 some systems use these upper case variants.
6679 25. If more than two messages were waiting for the same host, and a transport
6680 filter was specified for the transport, Exim sent two messages over the
6681 same TCP/IP connection, and then failed with "socket operation on non-
6682 socket" when it tried to send the third.
6684 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6686 27. The extern definition of crypt16() in expand.c was not being excluded when
6687 the OS had its own crypt16() function.
6689 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6690 as a preferred synonym for return_size_limit, both as an option and as an
6693 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6695 30. Changed the default configuration ACL to relax the local part checking rule
6696 for addresses that are not in any local domains. For these addresses,
6697 slashes and pipe symbols are allowed within local parts, but the sequence
6698 /../ is explicitly forbidden.
6700 31. SPA server authentication was not clearing the challenge buffer before
6703 32. log_message in a "warn" ACL statement was writing to the reject log as
6704 well as to the main log, which contradicts the documentation and doesn't
6705 seem right (because no rejection is happening). So I have stopped it.
6707 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6708 However, I am unable to do any testing of this.
6710 34. Fixed an infelicity in the appendfile transport. When checking directories
6711 for a mailbox, to see if any needed to be created, it was accidentally
6712 using path names with one or more superfluous leading slashes; tracing
6713 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6715 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6716 contents are added to the log line that is written for every discarded
6717 recipient. (Previously a log_message setting was ignored.)
6719 36. The ${quote: operator now quotes the string if it is empty.
6721 37. The install script runs exim in order to find its version number. If for
6722 some reason other than non-existence or emptiness, which it checks, it
6723 could not run './exim', it was installing it with an empty version number,
6724 i.e. as "exim-". This error state is now caught, and the installation is
6727 38. An argument was missing from the function that creates an error message
6728 when Exim fails to connect to the socket for saslauthd authentication.
6729 This could cause Exim to crash, or give a corrupted message.
6731 39. Added isip, isip4, and isip6 to ${if conditions.
6733 40. The ACL variables $acl_xx are now saved with the message, and can be
6734 accessed later in routers, transports, and filters.
6736 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6737 strings in the file are not string-expanded.
6739 42. If a MAIL command specified a SIZE value that was too large to fit into an
6740 int variable, the check against message_size_limit failed. Such values are
6741 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6742 day this will have to be increased, but I don't think I want to be around
6743 when emails are that large.
6750 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6751 iconv() is not standard in FreeBSD.
6753 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6754 IPv6 enabled. The observed symptom was a segmentation fault on return from
6755 the function os_common_find_running_interfaces() in src/os.c.
6757 3. In the check_special_case() function in daemon.c I had used "errno" as an
6758 argument name, which causes warnings on some systems. This was basically a
6759 typo, since it was named "eno" in the comments!
6761 4. The code that waits for the clock to tick (at a resolution of some fraction
6762 of a second) so as to ensure message-id uniqueness was always waiting for
6763 at least one whole tick, when it could have waited for less. [This is
6764 almost certainly not relevant at current processor speeds, where it is
6765 unlikely to ever wait at all. But we try to future-proof.]
6767 5. The function that sleeps for a time interval that includes fractions of a
6768 second contained a race. It did not block SIGALRM between setting the
6769 timer, and suspending (a couple of lines later). If the interval was short
6770 and the sigsuspend() was delayed until after it had expired, the suspension
6771 never ended. On busy systems this could lead to processes getting stuck for
6774 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6775 process, before it forks any delivery processes. The open lookup caching
6776 mechanism meant that the open file or database connection was passed into
6777 the delivery process. The problem was that delivery processes always tidy
6778 up cached lookup data. This could cause a problem for the next delivery
6779 process started by the queue runner, because the external queue runner
6780 process does not know about the closure. So the next delivery process
6781 still has data in the lookup cache. In the case of a file lookup, there was
6782 no problem because closing a file descriptor in a subprocess doesn't affect
6783 the parent. However, if the lookup was caching a connection to a database,
6784 the connection was closed, and the second delivery process was likely to
6785 see errors such as "PGSQL: query failed: server closed the connection
6786 unexpectedly". The problem has been fixed by closing all cached lookups
6787 in a queue runner before running a delivery process.
6789 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6790 seem to have the "const" qualifier which it has on other OS. I've
6793 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6794 *of the same type* (client or server) with the same public name that an
6795 error should be diagnosed.
6797 9. When Exim looked up a host name for an IP address, but failed to find the
6798 original IP address when looking up the host name (a safety check), it
6799 output the message "<ip address> does not match any IP for NULL", which was
6800 confusing, to say the least. The bug was that the host name should have
6801 appeared instead of "NULL".
6803 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6804 user that is built into the binary, and the -C or -D options is used, root
6805 privilege is dropped before the configuration file is read. In addition,
6806 logging is switched to stderr instead of the normal log files. If the
6807 configuration then re-defines the Exim user, the unprivileged environment
6808 is probably not what is expected, so Exim logs a panic warning message (but
6811 However, if deliver_drop_privilege is set, the unprivileged state may well
6812 be exactly what is intended, so the warning has been cut out in that case,
6813 and Exim is allowed to try to write to its normal log files.
6819 1. smtp_return_error_details was not giving details for temporary sender
6820 or receiver verification errors.
6822 2. Diagnose a configuration error if two authenticators have the same public
6825 3. Exim used not to create the message log file for a message until the first
6826 delivery attempt. This could be confusing when incoming messages were held
6827 for policy or load reasons. The message log file is now created at the time
6828 the message is received, and an initial "Received" line is written to it.
6830 4. The automatically generated man page for command line options had a minor
6831 bug that caused no ill effects; however, a more serious problem was that
6832 the procedure for building the man page automatically didn't always
6833 operate. Consequently, release 4.20 contains an out-of-date version. This
6834 shouldn't happen again.
6836 5. When building Exim with embedded Perl support, the script that builds the
6837 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6838 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6840 6. The freeze_tell option was not being used for messages that were frozen on
6841 arrival, either by an ACL or by local_scan().
6843 7. Added the smtp_incomplete_transaction log selector.
6845 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6846 was accepting AUTH without a new EHLO.
6848 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6849 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6852 10. Logging of TCP/IP connections (when configured) now happens in the main
6853 daemon process instead of the child process, so that the TCP/IP connection
6854 count is more accurate (but it can never be perfect).
6856 11. The use of "drop" in a nested ACL was not being handled correctly in the
6857 outer ACL. Now, if condition failure induced by the nested "drop" causes
6858 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6859 or "require"), the connection is dropped.
6861 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6862 that yield "discard" can now be used with an "accept" or a "discard" verb,
6863 but an error is generated for any others (because I can't see a useful way
6864 to define what should happen).
6866 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6867 are now processed in the same way as lines in the Exim configuration file.
6868 In particular, continuation lines are supported.
6870 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6872 15. Added -ti meaning -t -i.
6874 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6875 domains, and warn by logging if others are found.
6877 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6878 returned from GIFCONF when Exim is trying to find the list of interfaces on
6879 a host. The code in os.c has been modified to copy each ifreq to an aligned
6880 structure in all cases.
6882 Also, in some cases, the returned ifreq's were being copied to a 'struct
6883 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6884 means the last couple of bytes of an IPv6 address could be chopped if the
6885 ifreq contained only a normal sockaddr (14 bytes storage).
6887 18. Named domain lists were not supported in the hosts_treat_as_local option.
6888 An entry such as +xxxx was not recognized, and was treated as a literal
6891 19. Ensure that header lines added by a DATA ACL are included in the reject log
6892 if the ACL subsequently rejects the message.
6894 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6895 MD5 (which is deprecated).
6897 21. When testing a filter file using -bf, Exim was writing a message when it
6898 took the sender from a "From " line in the message, but it was not doing so
6899 when it took $return_path from a Return-Path: header line. It now does.
6901 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6902 with a valid header line field name (a series of printing characters
6903 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6905 23. Changed "disc" in the source to "disk" to conform to the documentation and
6906 the book and for uniformity.
6908 24. Ignore Sendmail's -Ooption=value command line item.
6910 25. When execve() failed while trying to run a command in a pipe transport,
6911 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6912 could be confused with a return value of 69 from the command itself. This
6913 has been changed to 127, the value the shell returns if it is asked to run
6914 a non-existent command. The wording for the related log line suggests a
6915 non-existent command as the problem.
6917 26. If received_header_text expands to an empty string, do not add a Received:
6918 header line to the message. (Well, it adds a token one on the spool, but
6919 marks it "old" so that it doesn't get used or transmitted.)
6921 27. Installed eximstats 1.28 (addition of -nt option).
6923 28. There was no check for failure on the call to getsockname() in the daemon
6924 code. This can fail if there is a shortage of resources on the system, with
6925 ENOMEM, for example. A temporary error is now given on failure.
6927 29. Contrary to the C standard, it seems that in some environments, the
6928 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6929 program. Exim now does this explicitly; it affects the formatting of
6930 timestamps using strftime().
6932 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6933 complaints. I've now initialized all the variables, to avoid this.
6935 32. Header lines added by a system filter were not being "seen" during
6936 transport-time rewrites.
6938 33. The info_callback() function passed to OpenSSL is set up with type void
6939 (*)(SSL *, int, int), as described somewhere. However, when calling the
6940 function (actually a macro) that sets it up, the type void(*)() is
6941 expected. I've put in a cast to prevent warnings from picky compilers.
6943 34. If a DNS black list lookup found a CNAME record, but there were no A
6944 records associated with the domain it pointed at, Exim crashed.
6946 35. If a DNS black list lookup returned more than one A record, Exim ignored
6947 all but the first. It now scans all returned addresses if a particular IP
6948 value is being sought. In this situation, the contents of the
6949 $dnslist_value variable are a list of all the addresses, separated by a
6952 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6953 to accept a host name and all its aliases if the forward lookup for any of
6954 them yielded the IP address of the incoming connection. Now it accepts only
6955 those names whose forward lookup yields the correct IP address. Any other
6956 names are discarded. This closes a loophole whereby a rogue DNS
6957 administrator could create reverse DNS records to break through a
6958 wildcarded host restriction in an ACL.
6960 37. If a user filter or a system filter that ran in a subprocess used any of
6961 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6962 the wrong values were passed to the pipe command ($thisaddress had the
6963 value of $0, $0 had the value of $1, etc). This bug was introduced by
6964 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6966 38. Improved the line breaking for long SMTP error messages from ACLs.
6967 Previously, if there was no break point between 40 and 75 characters, Exim
6968 left the rest of the message alone. Two changes have been made: (a) I've
6969 reduced the minimum length to 35 characters; (b) if it can't find a break
6970 point between 35 and 75 characters, it looks ahead and uses the first one
6971 that it finds. This may give the occasional overlong line, but at least the
6972 remaining text gets split now.
6974 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6975 file descriptors might be low, and that setting 1000 would always raise it.
6976 It turns out that in some environments, the limit is already over 1000 and
6977 that lowering it causes trouble. So now Exim takes care not to decrease it.
6979 40. When delivering a message, the value of $return_path is set to $sender_
6980 address at the start of routing (routers may change the value). By an
6981 oversight, this default was not being set up when an address was tested by
6982 -bt or -bv, which affected the outcome if any router or filter referred to
6985 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6986 log only when "message" or "log_message" are set. However, if one of the
6987 conditions was an address verification, or a call to a nested ACL, the
6988 messages generated by the underlying test were being passed through. This
6989 no longer happens. The underlying message is available in $acl_verify_
6990 message for both "message" and "log_message" expansions, so it can be
6991 passed through if needed.
6993 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6994 new expansion $bh_ to give the encoded byte string without charset
6995 translation. Translation happens only if iconv() is available; HAVE_ICONV
6996 indicates this at build time. HEADERS_CHARSET gives the charset to
6997 translate to; headers_charset can change it in the configuration, and
6998 "headers charset" can change it in an individual filter file.
7000 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7001 that creates RFC 2047 encoded "words" labels them as that charset instead
7002 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7003 expansion operator; (ii) when Exim creates a From: line for a local
7004 message; (iii) when a header line is rewritten to include a "phrase" part.
7006 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7007 buggy, causing it to skip the first lines of messages whose message ID
7008 ended in 'D'. This would not have bitten before Exim release 4.14, because
7009 message IDs were unlikely to end in 'D' before then. The effect was to have
7010 incorrect size information for certain domains.
7012 45. #include "config.h" was missing at the start of the crypt16.c module. This
7013 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7016 46. If there was a timeout during a "random" callout check, Exim treated it as
7017 a failure of the random address, and carried on sending RSET and the real
7018 address. If the delay was just some slowness somewhere, the response to the
7019 original RCPT would be taken as a response to RSET and so on, causing
7020 mayhem of various kinds.
7022 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7023 when I implemented it. It didn't allow for the fact that some option values
7024 may legitimately be negative (e.g. size_addition), and it didn't even do
7025 the right test for positive values.
7027 48. Domain names in DNS records are case-independent. Exim always looks them up
7028 in lower case. Some resolvers return domain names in exactly the case they
7029 appear in the zone file, that is, they may contain uppercase letters. Not
7030 all resolvers do this - some return always lower case. Exim was treating a
7031 change of case by a resolver as a change of domain, similar to a widening
7032 of a domain abbreviation. This triggered its re-routing code and so it was
7033 trying to route what was effectively the same domain again. This normally
7034 caused routing to fail (because the router wouldn't handle the domain
7035 twice). Now Exim checks for this case specially, and just changes the
7036 casing of the domain that it ultimately uses when it transmits the message
7039 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7042 50. If a filter generated a file delivery with a non-absolute name (possible if
7043 no home directory exists for the router), the forbid_file option was not
7046 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7047 the existing equality matching.
7049 52. Exim was using ints instead of ino_t variables in some places where it was
7050 dealing with inode numbers.
7052 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7053 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7054 called TMPDIR, and if it finds it is different, it changes its value.
7056 54. The smtp_printf() function is now made available to local_scan() so
7057 additional output lines can be written before returning. There is also an
7058 smtp_fflush() function to enable the detection of a dropped connection.
7059 The variables smtp_input and smtp_batched_input are exported to
7062 55. Changed the default runtime configuration: the message "Unknown user"
7063 has been removed from the ACL, and instead placed on the localuser router,
7064 using the cannot_route_message feature. This means that any verification
7065 failures that generate their own messages won't get overridden. Similarly,
7066 the "Unrouteable address" message that was in the ACL for unverifiable
7067 relay addresses has also been removed.
7069 56. Added hosts_avoid_esmtp to the smtp transport.
7071 57. The exicyclog script was not checking for the esoteric option
7072 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7073 will work only if exicyclog is run under the appropriate euid.
7075 58. Following a discussion on the list, the rules by which Exim recognises line
7076 endings on incoming messages have been changed. The -dropcr and drop_cr
7077 options are now no-ops, retained only for backwards compatibility. The
7078 following line terminators are recognized: LF CRLF CR. However, special
7079 processing applies to CR:
7081 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7082 nor a local message in the state where . is a terminator.
7084 (ii) If a bare CR is encountered in a header line, an extra space is added
7085 after the line terminator so as not to end the header. The reasoning
7086 behind this is that bare CRs in header lines are most likely either
7087 to be mistakes, or people trying to play silly games.
7089 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7090 was being incorrectly given as 18 bytes larger than it should have been.
7091 This is a VOB (very old bug).
7093 60. This may never have affected anything current, but just in case it has:
7094 When the local host is found other than at the start of a list of hosts,
7095 the local host, those with the same MX, and any that follow, are discarded.
7096 When the list in question was part of a longer list of hosts, the following
7097 hosts (not currently being processed) were also being discarded. This no
7098 longer happens. I'm not sure if this situation could ever has previously
7101 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7104 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7105 header. This is something that is recommended in a new Internet Draft, and
7106 is something that is documented as being done by Sendmail. There are two
7107 possible values. For messages generated by the autoreply transport, Exim
7110 Auto-Submitted: auto-replied
7112 whereas for all other generated messages (e.g. bounces) it adds
7114 Auto-Submitted: auto-generated
7116 63. The "personal" condition in filters now includes a test for the
7117 Auto-Submitted: header. If it contains the string "auto-" the message it
7118 not considered personal.
7120 64. Added rcpt_include_affixes as a generic transport option.
7122 65. Added queue_only_override (default true).
7124 66. Added the syslog_duplication option.
7126 67. If what should have been the first header line of a message consisted of
7127 a space followed by a colon, Exim was mis-interpreting it as a header line.
7128 It isn't of course - it is syntactically invalid and should therefore be
7129 treated as the start of the message body. The misbehaviour could have
7130 caused a number of strange effects, including loss of data in subsequent
7131 header lines, and spool format errors.
7133 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7134 client host had authenticated. This control can now be exercised by an ACL
7135 for more flexibility.
7137 69. By default, callouts do not happen when testing with -bh. There is now a
7138 variant, -bhc, which does actually run the callout code, including
7139 consulting and updating the callout cache.
7141 70. Added support for saslauthd authentication, courtesy of Alexander
7144 71. If statvfs() failed on the spool or log directories while checking their
7145 size for availability, Exim confusingly gave the error "space shortage".
7146 Furthermore, in debugging mode it crashed with a floating point exception.
7147 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7148 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7149 serious problem, Exim now writes to the main and panic logs when this
7150 happens, with details of the failure. It then refuses to accept the
7151 incoming message, giving the message "spool directory problem" or "log
7152 directory problem" with a 421 code for SMTP messages.
7154 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7155 0, 1, and 2 exist, because some OS complain for execs without them (see
7156 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7157 descriptors. However, the code omitted to check that the open succeeded,
7158 causing mysterious errors if for some reason the permissions on /dev/null
7159 got screwed. Now Exim writes a message to the main and panic logs, and
7160 bombs out if it can't open /dev/null.
7162 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7163 interact so that it is all more flexible. It is supposed to remain
7164 backwards compatible. Also added extra_local_interfaces.
7166 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7167 to bomb out with an assertion failure - to the client this appears as a
7168 connection drop. This problem occurs in the part of the code that was taken
7169 from the Samba project. Fortunately, the assertion is in a very simple
7170 function, so I have fixed this by reproducing the function inline in the
7171 one place where it is called, and arranging for authentication to fail
7172 instead of killing the process with assert().
7174 75. The SPA client code was not working when the server requested OEM rather
7175 than Unicode encoding.
7177 76. Added code to make require_files with a specific uid setting more usable in
7178 the case where statting the file as root fails - usually a non-root-mounted
7179 NFS file system. When this happens and the failure is EACCES, Exim now
7180 forks a subprocess and does the per-uid checking as the relevant uid.
7182 77. Added process_log_path.
7184 78. If log_file_path was not explicitly set, a setting of check_log_space or
7185 check_log_inodes was ignored.
7187 79. If a space check for the spool or log partitions fails, the incident is now
7188 logged. Of course, in the latter case the data may get lost...
7190 80. Added the %p formatting code to string_format() so that it can be used to
7191 print addresses in debug_print(). Adjusted all the address printing in the
7192 debugging in store.c to use %p rather than %d.
7194 81. There was a concern that a line of code in smtp_in.c could overflow a
7195 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7196 initially expressed, the concern was not well-founded, because trailing
7197 spaces are removed early. However, if the trailing spaces were followed by
7198 a NULL, they did not get removed, so the overflow was possible. Two fixes
7201 (a) I re-wrote the offending code in a cleaner fashion.
7202 (b) If an incoming SMTP command contains a NULL character, it is rejected
7205 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7206 runs initgroups(), so that if the Exim user is in any additional groups,
7207 they will be used during message reception.
7213 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob