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.
41 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
42 When redis_servers is set to a list of > 1 element, and the Redis servers
43 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
44 case of MOVED into a DEFER case instead, thus moving the query onto the
45 next server in the list. For a cluster of N elements, all N servers must
46 be defined in redis_servers.
48 GF/02 Catch and remove uninitialized value warning in exiqsumm
49 Check for existence of @ARGV before looking at $ARGV[0]
51 JH/01 Replace the store_release() internal interface with store_newblock(),
52 which internalises the check required to safely use the old one, plus
53 the allocate and data copy operations duplicated in both (!) of the
56 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
57 modifier. This matches the restriction on the commandline.
59 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
60 Previously only the last row was returned.
62 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
63 we assumed that tags in the header were well-formed, and parsed the
64 element content after inspecting only the first char of the tag.
65 Assumptions at that stage could crash the receive process on malformed
68 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
69 While running the DKIM ACL we operate on the Permanent memory pool so that
70 variables created with "set" persist to the DATA ACL. Also (at any time)
71 DNS lookups that fail create cache records using the Permanent pool. But
72 expansions release any allocations made on the current pool - so a dnsdb
73 lookup expansion done in the DKIM ACL releases the memory used for the
74 DNS negative-cache, and bad things result. Solution is to switch to the
75 Main pool for expansions.
76 While we're in that code, add checks on the DNS cache during store_reset,
77 active in the testsuite.
78 Problem spotted, and debugging aided, by Wolfgang Breyha.
80 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
81 When none of the hosts presented to a transport match an already-open
82 connection, close it and proceed with the list. Previously we would
83 queue the message. Spotted by Lena with Yahoo, probably involving
86 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
87 Previously a spurious "250 OK id=" response was appended to the proper
90 JH/08 The "support for" informational output now, which built with Content
91 Scanning support, has a line for the malware scanner interfaces compiled
92 in. Interface can be individually included or not at build time.
94 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
95 by the template makefile "src/EDITME". The "STREAM" support for an older
96 ClamAV interface method is removed.
98 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
99 rows affected is given instead).
101 JH/11 The runtime Berkeley DB library version is now additionally output by
102 "exim -d -bV". Previously only the compile-time version was shown.
104 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
105 SMTP connection. Previously, when one had more receipients than the
106 first, an abortive onward connection was made. Move to full support for
107 multiple onward connections in sequence, handling cutthrough connection
108 for all multi-message initiating connections.
110 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
111 routers. Previously, a multi-recipient message would fail to match the
112 onward-connection opened for the first recipient, and cause its closure.
114 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
115 a timeout on read on a GnuTLS initiating connection, resulting in the
116 initiating connection being dropped. This mattered most when the callout
117 was marked defer_ok. Fix to keep the two timeout-detection methods
120 JH/15 Relax results from ACL control request to enable cutthrough, in
121 unsupported situations, from error to silently (except under debug)
122 ignoring. This covers use with PRDR, frozen messages, queue-only and
125 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
127 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
128 metadata, resulting in a crash in free().
130 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
131 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
132 Broken also in d185889f4, with init system revamp.
134 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
135 Previously we abruptly closed the connection after reading a malware-
136 found indication; now we go on to read the "scan ok" response line,
139 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
140 ACL. Previously, a crash would result.
142 JH/19 Speed up macro lookups during configuration file read, by skipping non-
143 macro text after a replacement (previously it was only once per line) and
144 by skipping builtin macros when searching for an uppercase lead character.
146 JH/20 DANE support moved from Experimental to mainline. The Makefile control
147 for the build is renamed.
149 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
150 was allocated for every new TLS startup, meaning one per message. Fix
151 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
153 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
154 reported the original. Fix to report (as far as possible) the ACL
155 result replacing the original.
157 JH/23 Fix memory leak during multi-message connections using STARTTLS under
158 OpenSSL. Certificate information is loaded for every new TLS startup,
159 and the resources needed to be freed.
161 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
163 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
166 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
167 DATA response info to the (existing) per-recipient response info for
168 the "C=" log element. It can have useful tracking info from the
169 destination system. Patch from Simon Arlott.
171 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
172 length value. Previously this would segfault.
174 HS/02 Support Avast multiline protoocol, this allows passing flags to
175 newer versions of the scanner.
177 JH/28 Ensure that variables possibly set during message acceptance are marked
178 dead before release of memory in the daemon loop. This stops complaints
179 about them when the debug_store option is enabled. Discovered specifically
180 for sender_rate_period, but applies to a whole set of variables.
181 Do the same for the queue-runner and queue-list loops, for variables set
182 from spool message files. Do the same for the SMTP per-message loop, for
183 certain variables indirectly set in ACL operations.
185 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
186 as a multi-recipient message from a mailinglist manager). The coding had
187 an arbitrary cutoff number of characters while checking for more input;
188 enforced by writing a NUL into the buffer. This corrupted long / fast
189 input. The problem was exposed more widely when more pipelineing of SMTP
190 responses was introduced, and one Exim system was feeding another.
191 The symptom is log complaints of SMTP syntax error (NUL chars) on the
192 receiving system, and refused recipients seen by the sending system
193 (propating to people being dropped from mailing lists).
194 Discovered and pinpointed by David Carter.
196 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
197 replaced by the ${authresults } expansion.
199 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
201 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
202 allows proper process termination in container environments.
204 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
205 Previously the "final dot" had a newline after it; ensure it is CR,LF.
207 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
208 and "err_perm", deprecated since 4.83 when the RFC-defined words
209 "temperror" and "permerror" were introduced.
211 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
212 transport-filters or DKIM-signing. The restriction was lost in the
213 consolidation of verify-callout and delivery SMTP handling.
214 Extend the restriction to also cover ARC-signing.
216 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
217 in defer=pass mode supply a 450 to the initiator. Previously the message
220 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
221 tls_require_ciphers is used as before.
223 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
224 "pass_unscanned". Only tmpfails from the scanner are written to
225 the paniclog, as they may require admin intervention (permission
226 denied, license issues). Other scanner errors (like decompression
227 bombs) do not cause a paniclog entry.
229 JH/36 Fix reinitialisation of DKIM logging variable between messages.
230 Previously it was possible to log spurious information in receive log
233 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
234 triggered odd behaviour from Outlook Express clients.
236 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
239 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
240 since the IETF WG has not yet settled on that versus the original
241 "bare" representation.
243 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
244 Previously the millisecond value corrupted the output.
245 Fix also for syslog_pid=no and log_selector +pid, for which the pid
246 corrupted the output.
252 JH/01 Rework error string handling in TLS interface so that the caller in
253 more cases is responsible for logging. This permits library-sourced
254 string to be attached to addresses during delivery, and collapses
255 pairs of long lines into single ones.
257 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
258 during configuration. Wildcards are allowed and expanded.
260 JH/02 Rework error string handling in DKIM to pass more info back to callers.
261 This permits better logging.
263 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
264 do not close it down and have the child transport start it up again on
265 the passed-on TCP connection. Instead, proxy the child (and any
266 subsequent ones) for TLS via a unix-domain socket channel. Logging is
267 affected: the continued delivery log lines do not have any DNSSEC, TLS
268 Certificate or OCSP information. TLS cipher information is still logged.
270 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
271 identical IP addresses on different listening ports. Will also affect
274 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
275 add noisy ifdef guards to special-case this sillyness.
276 Patch from Bernd Kuhls.
278 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
279 than 255 are no longer allowed.
281 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
282 Disable the session-cache too, which might reduce our load. Since we
283 currrectly use a new context for every connection, both as server and
284 client, there is no benefit for these.
285 GnuTLS appears to not support tickets server-side by default (we don't
286 call gnutls_session_ticket_enable_server()) but client side is enabled
287 by default on recent versions (3.1.3 +) unless the PFS priority string
290 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
291 <https://reproducible-builds.org/specs/source-date-epoch/>.
293 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
294 the check for any unsuccessful recipients did not notice the limit, and
295 erroneously found still-pending ones.
297 JH/08 Pipeline CHUNKING command and data together, on kernels that support
298 MSG_MORE. Only in-clear (not on TLS connections).
300 JH/09 Avoid using a temporary file during transport using dkim. Unless a
301 transport-filter is involved we can buffer the headers in memory for
302 creating the signature, and read the spool data file once for the
303 signature and again for transmission.
305 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
306 4.77 as the kernel support then wasn't solid, having issues in 64bit
307 mode. Now, it's been long enough. Add support for FreeBSD also.
309 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
310 case where the routing stage had gathered several addresses to send to
311 a host before calling the transport for the first, we previously failed
312 to close down TLS in the old transport process before passing the TCP
313 connection to the new process. The new one sent a STARTTLS command
314 which naturally failed, giving a failed delivery and bloating the retry
315 database. Investigation and fix prototype from Wolfgang Breyha.
317 JH/12 Fix check on SMTP command input synchronisation. Previously there were
318 false-negatives in the check that the sender had not preempted a response
319 or prompt from Exim (running as a server), due to that code's lack of
320 awareness of the SMTP input buffering.
322 PP/04 Add commandline_checks_require_admin option.
323 Exim drops privileges sanely, various checks such as -be aren't a
324 security problem, as long as you trust local users with access to their
325 own account. When invoked by services which pass untrusted data to
326 Exim, this might be an issue. Set this option in main configuration
327 AND make fixes to the calling application, such as using `--` to stop
330 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
331 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
332 responses to those, into a single TLS record each way (this usually means
333 a single packet). As a side issue, smtp_enforce_sync now works on TLS
336 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
337 affects you only if you're dancing at the edge of the param size limits.
338 If you are, and this message makes sense to you, then: raise the
339 configured limit or use OpenSSL 1.1. Nothing we can do for older
342 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
343 cmdline element to get the documented default one. Previously it was
346 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
347 are unsuable for non-message-specific reasons - eg. connection timeout,
348 banner-time rejection.
350 JH/16 Fix logging of delivery remote port, when specified by router, under
353 PP/06 Repair manualroute's ability to take options in any order, even if one
354 is the name of a transport.
357 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
359 JH/17 Change the list-building routines interface to use the expanding-string
360 triplet model, for better allocation and copying behaviour.
362 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
363 Previously it was constructed the first time a possibly-matching string
364 was met in the configuration file input during startup; now it is done
367 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
368 compatible one, to avoid the (poorly documented) possibility of a config
369 file in the working directory redirecting the DB files, possibly correpting
370 some existing file. CVE-2017-10140 assigned for BDB.
372 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
373 cache-hot. Previously, although the result was properly cached, the
374 initial verify call returned a defer.
376 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
377 the main verify for receipient in uncached-mode.
379 JH/22 Retire historical build files to an "unsupported" subdir. These are
380 defined as "ones for which we have no current evidence of testing".
382 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
383 if present. Previously it was ignored.
385 JH/24 Start using specified-initialisers in C structure init coding. This is
386 a C99 feature (it's 2017, so now considered safe).
388 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
389 if was a fixed-sized field and bitmask ops via macros; it is now more
392 PP/07 GitHub PR 56: Apply MariaDB build fix.
393 Patch provided by Jaroslav Škarvada.
395 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
396 during Coverity cleanups [4.87 JH/47]
397 Diagnosis and fix provided by Michael Fischer v. Mollard.
399 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
400 the right size to place the terminating semicolon on its own folded
401 line, the header hash was calculated to an incorrect value thanks to
402 the (relaxed) space the fold became.
404 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
405 and confused the parent.
407 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
408 which could crash as a result. This could lead to undeliverable messages.
410 JH/28 Logging: "next input sent too soon" now shows where input was truncated
413 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
414 matters on fast-turnover and PID-randomising systems, which were getting
415 out-of-order delivery.
417 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
418 a possibly-overlapping copy. The symptom was that "Remote host closed
419 connection in response to HELO" was logged instead of the actual 4xx
422 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
423 Previously only that bufferd was discarded, resulting in SYMTP command
426 JH/32 DKIM: when a message has multiple signatures matching an identity given
427 in dkim_verify_signers, run the dkim acl once for each. Previously only
428 one run was done. Bug 2189.
430 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
431 "panic the current process" to "deliberately defer". The panic log is
432 still written with the problem list name; the mail and reject logs now
433 get a temp-reject line for the message that was being handled, saying
434 something like "domains check lookup or other defer". The SMTP 451
435 message is still "Temporary local problem".
437 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
438 A crafted sequence of BDAT commands could result in in-use memory beeing
439 freed. CVE-2017-16943.
441 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
442 from SMTP input. Previously it was always done; now only done for DATA
443 and not BDAT commands. CVE-2017-16944.
445 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
446 to the message (such as an overlong header line). Previously this was
447 not done and we did not exit BDAT mode. Followon from the previous item
448 though a different problem.
454 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
455 than -2003 did; needs libidn2 in addition to libidn.
457 JH/02 The path option on a pipe transport is now expanded before use.
459 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
460 Patch provided by "Björn", documentation fix added too.
462 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
463 missing a wire-to-host endian conversion.
465 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
466 close after a BDAT command line could be taken as a following command,
467 giving a synch failure. Fix by only checking for synch immediately
468 before acknowledging the chunk.
470 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
471 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
472 macro. Patches provided by Josh Soref.
474 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
475 Previously we did not; the RFC seems ambiguous and VRFY is not listed
476 by IANA as a service extension. However, John Klensin suggests that we
479 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
480 the dkim code may be unix-mode line endings rather than smtp wire-format
481 CRLF, so prepend a CR to any bare LF.
483 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
484 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
486 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
487 the first were themselves being wrongly included in the feed into dkim
488 processing; with most chunk sizes in use this resulted in an incorrect
489 body hash calculated value.
491 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
492 DKIM signature block, for verification. Although advised against by
493 standards it is specifically not ruled illegal.
495 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
497 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
498 missing a body hash (the bh= tag).
500 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
501 It seems that HAProxy sends the Proxy Protocol information in clear and
502 only then does a TLS startup, so do the same.
504 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
505 TCP connections (such as for Spamd) unless the daemon successfully set
506 Fast Open mode on its listening sockets. This fixes breakage seen on
507 too-old kernels or those not configured for Fast Open, at the cost of
508 requiring both directions being enabled for TFO, and TFO never being used
509 by non-daemon-related Exim processes.
511 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
512 endings, at least on the first header line. Try to canonify any that get
513 past that check, despite the cost.
515 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
516 now limited to an arbitrary five deep, while parsing addresses with the
517 strip_excess_angle_brackets option enabled.
519 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
520 instead leave the unprompted TLS handshake in socket buffer for the
521 TLS library to consume.
523 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
525 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
527 JH/16 Drop variables when they go out of scope. Memory management drops a whole
528 region in one operation, for speed, and this leaves assigned pointers
529 dangling. Add checks run only under the testsuite which checks all
530 variables at a store-reset and panics on a dangling pointer; add code
531 explicitly nulling out all the variables discovered. Fixes one known
532 bug: a transport crash, where a dangling pointer for $sending_ip_address
533 originally assigned in a verify callout, is re-used.
535 PP/06 Drop '.' from @INC in various Perl scripts.
537 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
539 PP/08 Reduce a number of compilation warnings under clang; building with
540 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
541 should be warning-free.
543 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
545 HS/01 Fix portability problems introduced by PP/08 for platforms where
546 realloc(NULL) is not equivalent to malloc() [SunOS et al].
548 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
549 chunk. This allows us to accept broken chunked messages. We need a more
550 general solution here.
552 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
553 already-broken messages in the queue.
555 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
557 JH/19 Fix reference counting bug in routing-generated-address tracking.
563 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
564 supports it and a size is available (ie. the sending peer gave us one).
566 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
567 years of being deprecated). The replacements are the ACLs
568 acl_smtp_mime and acl_not_smtp_mime.
570 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
571 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
572 or even an in-clear connection were permitted. Now, if the host lookup
573 was dnssec and dane was requested then the host is only used if the
574 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
575 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
576 if one fails this test.
577 This means that a poorly-configured remote DNS will make it incommunicado;
578 but it protects against a DNS-interception attack on it.
580 JH/04 Bug 1810: make continued-use of an open smtp transport connection
581 non-noisy when a race steals the message being considered.
583 JH/05 If main configuration option tls_certificate is unset, generate a
584 self-signed certificate for inbound TLS connections.
586 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
587 in rewrites and routers.
589 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
590 and logged a warning sing 4.83; now they are a configuration file error.
592 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
593 (lacking @domain). Apply the same qualification processing as RCPT.
595 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
597 JH/10 Support ${sha256:} applied to a string (as well as the previous
600 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
601 a cutthrough deliver is pending, as we always want to make a connection.
602 This also avoids re-routing the message when later placing the cutthrough
603 connection after a verify cache hit.
604 Do not update it with the verify result either.
606 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
607 when routing results in more than one destination address.
609 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
610 signing (which inhibits the cutthrough capability). Previously only
611 the presence of an option was tested; now an expansion evaluating as
612 empty is permissible (obviously it should depend only on data available
613 when the cutthrough connection is made).
615 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
616 the relevant preceding SMTP command did not note the pipelining mode.
618 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
619 Previously they were not counted.
621 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
622 as one having no matching records. Previously we deferred the message
623 that needed the lookup.
625 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
626 distinguished as "(=".
628 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
629 for missing MX records. Previously it only worked for missing A records.
631 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
633 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
634 after the data-go-ahead and data-ack. Patch from Jason Betts.
636 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
637 even for a "none" policy. Patch from Tony Meyer.
639 JH/22 Fix continued use of a connection for further deliveries. If a port was
640 specified by a router, it must also match for the delivery to be
643 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
644 When one of the recipients of a message was unsuitable for the connection
645 (has no matching addresses), we lost track of needing to mark it
646 deferred. As a result mail would be lost.
648 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
650 JH/25 Decoding ACL controls is now done using a binary search; the source code
651 takes up less space and should be simpler to maintain. Merge the ACL
652 condition decode tables also, with similar effect.
654 JH/26 Fix problem with one_time used on a redirect router which returned the
655 parent address unchanged. A retry would see the parent address marked as
656 delivered, so not attempt the (identical) child. As a result mail would
659 JH/27 Fix a possible security hole, wherein a process operating with the Exim
660 UID can gain a root shell. Credit to http://www.halfdog.net/ for
661 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
664 JH/28 Enable {spool,log} filesystem space and inode checks as default.
665 Main config options check_{log,spool}_{inodes,space} are now
666 100 inodes, 10MB unless set otherwise in the configuration.
668 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
669 Previously it only applied to the main-section connection policy
672 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
674 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
675 by me. Added RFC7919 DH primes as an alternative.
677 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
678 are not in the system include path.
680 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
681 GnuTLS, when a session startup failed (eg because the client disconnected)
682 Exim did stdio operations after fclose. This was exposed by a recent
683 change which nulled out the file handle after the fclose.
685 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
686 signed directly by the cert-signing cert, rather than an intermediate
687 OCSP-signing cert. This is the model used by LetsEncrypt.
689 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
691 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
692 an incoming connection.
694 HS/02 Bug 1802: Do not half-close the connection after sending a request
697 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
698 fallback to "prime256v1".
700 JH/34 SECURITY: Use proper copy of DATA command in error message.
701 Could leak key material. Remotely exploitable. CVE-2016-9963.
707 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
708 and 3.4.4 - once the server is enabled to respond to an OCSP request
709 it does even when not requested, resulting in a stapling non-aware
710 client dropping the TLS connection.
712 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
713 support variable-length bit vectors. No functional change.
715 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
716 The I= interface field on outgoing lines is now after the H= remote
717 host field, same as incoming lines. There is a separate
718 outgoing_interface log selector which allows you to disable the
721 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
722 If not running log_selector +smtp_connection the mainlog would be held
723 open indefinitely after a "too many connections" event, including to a
724 deleted file after a log rotate. Leave the per net connection logging
725 leaving it open for efficiency as that will be quickly detected by the
726 check on the next write.
728 HS/01 Bug 1671: Fix post transport crash.
729 Processing the wait-<transport> messages could crash the delivery
730 process if the message IDs didn't exist for some reason. When
731 using 'split_spool_directory=yes' the construction of the spool
732 file name failed already, exposing the same netto behaviour.
734 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
735 mime_regex ACL conditions.
737 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
738 to DSN fail messages (bounces): remote IP, remote greeting, remote response
739 to HELO, local diagnostic string.
741 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
742 log line to debug. Even when configured with a tls authenticator many
743 client connections are expected to not authenticate in this way, so
744 an authenticate fail is not an error.
746 HS/02 Add the Exim version string to the process info. This way exiwhat
747 gives some more detail about the running daemon.
749 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
750 matter for fast-change records such as DNSBLs.
752 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
753 retry record, even if constant. There may be multiple transports with
754 different interface settings and the retry behaviour needs to be kept
757 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
759 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
761 JH/10 Bug 840: fix log_defer_output option of pipe transport
763 JH/11 Bug 830: use same host for all RCPTS of a message, even under
764 hosts_randomize. This matters a lot when combined with mua_wrapper.
766 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
767 ${quote_pgsql:<string>} operator.
769 JH/13 Bug 1708: avoid misaligned access in cached lookup.
771 JH/14 Change header file name for freeradius-client. Relevant if compiling
772 with Radius support; from the Gentoo tree and checked under Fedora.
774 JH/15 Bug 1712: Introduce $prdr_requested flag variable
776 JH/16 Bug 1714: Permit an empty string as expansion result for transport
777 option transport_filter, meaning no filtering.
779 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
781 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
782 defaults to "*" (all hosts). The variable is now available when not built
783 with TLS, default unset, mainly to enable keeping the testsuite sane.
784 If a server certificate is not supplied (via tls_certificate) an error is
785 logged, and clients will find TLS connections fail on startup. Presumably
786 they will retry in-clear.
787 Packagers of Exim are strongly encouraged to create a server certificate
788 at installation time.
790 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
791 with the $config_file variable.
793 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
794 in transport context, after the attempt, and per-recipient. The latter type
795 is per host attempted. The event data is the error message, and the errno
796 information encodes the lookup type (A vs. MX) used for the (first) host,
797 and the trailing two digits of the smtp 4xx response.
799 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
800 to write to mainlog (or rejectlog, paniclog) in the window between file
801 creation and permissions/ownership being changed. Particularly affects
802 installations where exicyclog is run as root, rather than exim user;
803 result is that the running daemon panics and dies.
805 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
807 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
808 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
809 "pri" and "weight". Note that the previous implicit priority given by the
810 list order is no longer honoured.
812 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
815 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
816 by defining SUPPORT_SOCKS.
818 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
819 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
820 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
821 variables are renamed to proxy_{local,external}_{address,port}.
823 JH/27 Move Internationalisation support from Experimental to mainline, enabled
824 for a build by defining SUPPORT_I18N
826 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
827 of the query string, and make ${quote_redis:} do that quoting.
829 JH/29 Move Events support from Experimental to mainline, enabled by default
830 and removable for a build by defining DISABLE_EVENT.
832 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
834 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
835 cached by the daemon.
837 JH/32 Move Redis support from Experimental to mainline, enabled for a build
838 by defining LOOKUP_REDIS. The libhiredis library is required.
840 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
841 keys are given for lookup.
843 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
844 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
845 only supported when built with TLS support. The PolarSSL SHA routines
846 are still used when the TLS library is too old for convenient support.
848 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
849 openssl_options), for security. OpenSSL forces this from version 1.1.0
850 server-side so match that on older versions.
852 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
853 allocation for $value could be released as the expansion processing
854 concluded, but leaving the global pointer active for it.
856 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
857 and to use the domains and local_parts ACL conditions.
859 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
860 incorrectly not doubled on cutthrough transmission, hence seen as a
861 body-termination at the receiving system - resulting in truncated mails.
862 Commonly the sender saw a TCP-level error, and retransmitted the message
863 via the normal store-and-forward channel. This could result in duplicates
864 received - but deduplicating mailstores were liable to retain only the
865 initial truncated version.
867 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
869 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
871 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
872 we're in there, support oversigning also; bug 1309.
874 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
876 HS/04 Add support for keep_environment and add_environment options.
878 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
879 either intentional arithmetic overflow during PRNG, or testing config-
882 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
883 delivery resulted in actual delivery. Cancel cutthrough before DATA
886 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
887 rejects a recipient: pass the reject to the originator.
889 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
890 Many were false-positives and ignorable, but it's worth fixing the
893 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
894 for the new environment-manipulation done at startup. Move the routines
895 from being local to tls.c to being global via the os.c file.
897 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
898 an extract embedded as result-arg for a map, the first arg for extract
899 is unavailable so we cannot tell if this is a numbered or keyed
900 extraction. Accept either.
906 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
909 JH/02 The smtp transport option "multi_domain" is now expanded.
911 JH/03 The smtp transport now requests PRDR by default, if the server offers
914 JH/04 Certificate name checking on server certificates, when exim is a client,
915 is now done by default. The transport option tls_verify_cert_hostnames
916 can be used to disable this per-host. The build option
917 EXPERIMENTAL_CERTNAMES is withdrawn.
919 JH/05 The value of the tls_verify_certificates smtp transport and main options
920 default to the word "system" to access the system default CA bundle.
921 For GnuTLS, only version 3.0.20 or later.
923 JH/06 Verification of the server certificate for a TLS connection is now tried
924 (but not required) by default. The verification status is now logged by
925 default, for both outbound TLS and client-certificate supplying inbound
928 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
931 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
932 Status Notification (bounce) messages are now MIME format per RFC 3464.
933 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
934 under the control of the dsn_advertise_hosts option, and routers may
935 have a dsn_lasthop option.
937 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
938 default, modifiable by a malware= option. The list separator for
939 the options can now be changed in the usual way. Bug 68.
941 JH/10 The smtp_receive_timeout main option is now expanded before use.
943 JH/11 The incoming_interface log option now also enables logging of the
944 local interface on delivery outgoing connections.
946 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
947 if the interface and destination host and port all match.
949 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
952 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
953 Patch from Andrew Lewis.
955 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
956 now supports optional time-restrictions, weighting, and priority
957 modifiers per server. Patch originally by <rommer@active.by>.
959 JH/16 The spamd_address main option now supports a mixed list of local
960 and remote servers. Remote servers can be IPv6 addresses, and
961 specify a port-range.
963 JH/17 Bug 68: The spamd_address main option now supports an optional
964 timeout value per server.
966 JH/18 Bug 1581: Router and transport options headers_add/remove can
967 now have the list separator specified.
969 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
972 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
975 JH/21 Support for the A6 type of dns record is withdrawn.
977 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
978 rather than the verbs used.
980 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
981 from 255 to 1024 chars.
983 JH/24 Verification callouts now attempt to use TLS by default.
985 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
986 are generic router options now. The defaults didn't change.
988 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
989 Original patch from Alexander Shikoff, worked over by JH.
991 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
992 files if ZCAT_COMMAND is not executable.
994 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
996 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
998 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
999 Normally benign, it bites when the pair was led to by a CNAME;
1000 modern usage is to not canonicalize the domain to a CNAME target
1001 (and we were inconsistent anyway for A-only vs AAAA+A).
1003 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1005 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1006 when evaluating $sender_host_dnssec.
1008 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1009 $sender_helo_dnssec variable.
1011 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1013 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1015 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1017 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1018 documented as working, but never had. Support all but $spam_report.
1020 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1021 added for tls authenticator.
1023 HS/03 Add perl_taintmode main config option
1029 TL/01 When running the test suite, the README says that variables such as
1030 no_msglog_check are global and can be placed anywhere in a specific
1031 test's script, however it was observed that placement needed to be near
1032 the beginning for it to behave that way. Changed the runtest perl
1033 script to read through the entire script once to detect and set these
1034 variables, reset to the beginning of the script, and then run through
1035 the script parsing/test process like normal.
1037 TL/02 The BSD's have an arc4random API. One of the functions to induce
1038 adding randomness was arc4random_stir(), but it has been removed in
1039 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1040 function when detected.
1042 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1043 cause callback expansion.
1045 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1046 syntax errors in an expansion can be treated as a string instead of
1047 logging or causing an error, due to the internal use of bool_lax
1048 instead of bool when processing it.
1050 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1051 server certificates when making smtp deliveries.
1053 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1055 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1057 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1059 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1060 Merged patch from Sebastian Wiedenroth.
1062 JH/05 Fix results-pipe from transport process. Several recipients, combined
1063 with certificate use, exposed issues where response data items split
1064 over buffer boundaries were not parsed properly. This eventually
1065 resulted in duplicates being sent. This issue only became common enough
1066 to notice due to the introduction of connection certificate information,
1067 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1069 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1070 size buffer was used, resulting in syntax errors when an expansion
1073 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1074 version 3.3.6 or later.
1076 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1077 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1078 both become "event_action", the variables become $event_name, $event_data
1079 and $event_defer_errno. There is a new variable $verify_mode, usable in
1080 routers, transports and related events. The tls:cert event is now also
1081 raised for inbound connections, if the main configuration event_action
1084 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1085 early OCSP support, but no stapling (appears to be less than 1.0.0).
1087 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1088 server certificate names available under the smtp transport option
1089 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1092 JH/10 Time-related extraction expansions from certificates now use the main
1093 option "timezone" setting for output formatting, and are consistent
1094 between OpenSSL and GnuTLS compilations. Bug 1541.
1096 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1097 encoded parameter in the incoming message. Bug 1558.
1099 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1100 include certificate info, eximon was claiming there were spoolfile
1103 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1105 JH/14 Log delivery-related information more consistently, using the sequence
1106 "H=<name> [<ip>]" wherever possible.
1108 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1109 are problematic for Debian distribution, omit them from the release
1112 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1114 JH/16 Fix string representation of time values on 64bit time_t architectures.
1117 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1118 output list separator was used.
1123 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1124 checkers that were complaining about end of non-void function with no
1127 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1128 This was a regression introduced in 4.83 by another bugfix.
1130 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1132 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1133 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1139 TF/01 Correctly close the server side of TLS when forking for delivery.
1141 When a message was received over SMTP with TLS, Exim failed to clear up
1142 the incoming connection properly after forking off the child process to
1143 deliver the message. In some situations the subsequent outgoing
1144 delivery connection happened to have the same fd number as the incoming
1145 connection previously had. Exim would try to use TLS and fail, logging
1146 a "Bad file descriptor" error.
1148 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1149 utilities have not been installed.
1151 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1152 temporary space as the ACL may create new global variables.
1154 TL/01 LDAP support uses per connection or global context settings, depending
1155 upon the detected version of the libraries at build time.
1157 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1158 to extract and use the src ip:port in logging and expansions as if it
1159 were a direct connection from the outside internet. PPv2 support was
1160 updated based on HAProxy spec change in May 2014.
1162 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1164 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1165 Properly escape header and check for NULL return.
1167 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1170 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1172 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1173 characters in header names, implemented as a verify condition.
1174 Contributed by Michael Fischer v. Mollard.
1176 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1177 results permerror and temperror. Previous values are deprecated but
1178 still accepted. In a future release, err_perm and err_temp will be
1179 completely removed, which will be a backward incompatibility if the
1180 ACL tests for either of these two old results. Patch contributed by
1181 user bes-internal on the mailing list.
1183 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1185 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1186 selectors, in both main and reject logs.
1188 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1191 JH/07 Add malware type "sock" for talking to simple daemon.
1193 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1195 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1196 routers/transports under cutthrough routing.
1198 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1199 numbers. Touch up "bool" conditional to keep the same definition.
1201 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1203 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1205 JH/12 Expand items in router/transport headers_add or headers_remove lists
1206 individually rather than the list as a whole. Bug 1452.
1208 Required for reasonable handling of multiple headers_ options when
1209 they may be empty; requires that headers_remove items with embedded
1210 colons must have them doubled (or the list-separator changed).
1212 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1213 view the policy declared in the DMARC record. Currently, $dmarc_status
1214 is a combined value of both the record presence and the result of the
1217 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1219 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1220 dnslookup router and the smtp transport (applying to the forward
1223 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1224 of ldap servers used for a specific lookup. Patch provided by Heiko
1227 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1228 New variable $lookup_dnssec_authenticated for observability.
1230 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1231 Patch submitted by Lars Timman.
1233 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1235 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1236 Requires trusted mode and valid format message id, aborts otherwise.
1237 Patch contributed by Heiko Schlichting.
1239 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1240 certextract with support for various fields. Bug 1358.
1242 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1243 is requested by default, modifiable by smtp transport option
1246 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1247 operate on certificate variables to give certificate fingerprints
1248 Also new ${sha256:cert_variable}.
1250 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1252 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1253 Christian Aistleitner.
1255 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1257 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1258 file. Patch from Wolfgang Breyha.
1260 JH/25 Expand the coverage of the delivery $host and $host_address to
1261 client authenticators run in verify callout. Bug 1476.
1263 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1264 align with daemon_smtp_ports. Bug 72.
1266 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1267 support and error reporting did not work properly.
1269 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1270 and is readable. Patch from Andrew Colin Kissa.
1272 TL/14 Enhance documentation of ${run expansion and how it parses the
1273 commandline after expansion, particularly in the case when an
1274 unquoted variable expansion results in an empty value.
1276 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1278 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1279 by renaming away from it. Addresses GH issue 15, reported by
1282 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1284 TL/15 SECURITY: prevent double expansion in math comparison functions
1285 (can expand unsanitized data). Not remotely exploitable.
1292 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1294 PP/02 Make -n do something, by making it not do something.
1295 When combined with -bP, the name of an option is not output.
1297 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1300 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1301 $sender_host_name and config options to manage this, and basic check
1304 PP/05 DSCP support for outbound connections and control modifier for inbound.
1306 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1307 (Only plugin which currently uses this is kerberos4, which nobody should
1308 be using, but we should make it available and other future plugins might
1309 conceivably use it, even though it would break NAT; stuff *should* be
1310 using channel bindings instead).
1312 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1313 name; added for Sendmail compatibility; requires admin caller.
1314 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1315 just ignore it); requires trusted caller.
1316 Also parse but ignore: -Ac -Am -X<logfile>
1319 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1321 TL/02 Add +smtp_confirmation as a default logging option.
1323 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1324 Patch by Magnus Holmgren from 2007-02-20.
1326 TL/04 Bugzilla 1281 - Spec typo.
1327 Bugzilla 1283 - Spec typo.
1328 Bugzilla 1290 - Spec grammar fixes.
1330 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1332 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1334 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1335 mailing list by by Dmitry Isaikin.
1337 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1339 JH/02 Support "G" suffix to numbers in ${if comparisons.
1341 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1343 NM/01 Bugzilla 1197 - Spec typo
1344 Bugzilla 1196 - Spec examples corrections
1346 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1348 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1349 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1352 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1353 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1355 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1356 "acl {{name}{arg}...}", and optional args on acl condition
1359 JH/05 Permit multiple router/transport headers_add/remove lines.
1361 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1363 JH/07 Avoid using a waiting database for a single-message-only transport.
1364 Performance patch from Paul Fisher. Bugzilla 1262.
1366 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1369 JH/09 Add $headers_added variable, with content from use of ACL modifier
1370 add_header (but not yet added to the message). Bugzilla 199.
1372 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1373 Pulled from Bugzilla 817 by Wolfgang Breyha.
1375 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1377 (nb: this is the same fix as in Exim 4.80.1)
1379 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1382 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1385 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1387 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1388 advertise SMTP AUTH mechanism to us, instead of a generic
1389 protocol violation error. Also, make Exim more robust to bad
1390 data from the Dovecot auth socket.
1392 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1394 When a queue runner is handling a message, Exim first routes the
1395 recipient addresses, during which it prunes them based on the retry
1396 hints database. After that it attempts to deliver the message to
1397 any remaining recipients. It then updates the hints database using
1400 So if a recipient address works intermittently, it can get repeatedly
1401 deferred at routing time. The retry hints record remains fresh so the
1402 address never reaches the final cutoff time.
1404 This is a fairly common occurrence when a user is bumping up against
1405 their storage quota. Exim had some logic in its local delivery code
1406 to deal with this. However it did not apply to per-recipient defers
1407 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1409 This change adds a proper retry rule check during routing so that the
1410 final cutoff time is checked against the message's age. We only do
1411 this check if there is an address retry record and there is not a
1412 domain retry record; this implies that previous attempts to handle
1413 the address had the retry_use_local_parts option turned on. We use
1414 this as an approximation for the destination being like a local
1415 delivery, as in LMTP.
1417 I suspect this new check makes the old local delivery cutoff check
1418 redundant, but I have not verified this so I left the code in place.
1420 TF/02 Correct gecos expansion when From: is a prefix of the username.
1422 Test 0254 submits a message to Exim with the header
1426 When I ran the test suite under the user fanf2, Exim expanded
1427 the header to contain my full name, whereas it should have added
1428 a Resent-Sender: header. It erroneously treats any prefix of the
1429 username as equal to the username.
1431 This change corrects that bug.
1433 GF/01 DCC debug and logging tidyup
1434 Error conditions log to paniclog rather than rejectlog.
1435 Debug lines prefixed by "DCC: " to remove any ambiguity.
1437 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1439 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1440 Bug spotted by Jeremy Harris; was flawed since initial commit.
1441 Would have resulted in OCSP responses post-SNI triggering an Exim
1442 NULL dereference and crash.
1444 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1446 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1447 Bug detection, analysis and fix by Samuel Thibault.
1448 Bugzilla 1331, Debian bug #698092.
1450 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1452 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1453 Server implementation by Todd Lyons, client by JH.
1454 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1455 config variable "prdr_enable" controls whether the server
1456 advertises the facility. If the client requests PRDR a new
1457 acl_data_smtp_prdr ACL is called once for each recipient, after
1458 the body content is received and before the acl_smtp_data ACL.
1459 The client is controlled by both of: a hosts_try_prdr option
1460 on the smtp transport, and the server advertisement.
1461 Default client logging of deliveries and rejections involving
1462 PRDR are flagged with the string "PRDR".
1464 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1465 fclose(). Diagnosis by Todd Lyons.
1467 PP/17 Update configure.default to handle IPv6 localhost better.
1468 Patch by Alain Williams (plus minor tweaks).
1471 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1472 This is now consistent with GnuTLS, and is now documented: the
1473 previous undocumented portable approach to treating the option as
1474 unset was to force an expansion failure. That still works, and
1475 an empty string is now equivalent.
1477 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1478 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1479 not performing validation itself.
1481 PP/20 Added force_command boolean option to pipe transport.
1482 Patch from Nick Koston, of cPanel Inc.
1484 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1487 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1489 PP/21 Fix eximon continuous updating with timestamped log-files.
1490 Broken in a format-string cleanup in 4.80, missed when I repaired the
1491 other false fix of the same issue.
1492 Report and fix from Heiko Schlichting.
1495 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1496 Report from Prashanth Katuri.
1498 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1499 It's SecureTransport, so affects any MacOS clients which use the
1500 system-integrated TLS libraries, including email clients.
1502 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1503 using a MIME ACL for non-SMTP local injection.
1504 Report and assistance in diagnosis by Warren Baker.
1506 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1508 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1510 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1511 last id that failed so it may be referenced in subsequent ACL's.
1513 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1516 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1517 ldap library initialization, allowing self-signed CA's to be
1518 used. Also properly sets require_cert option later in code by
1519 using NULL (global ldap config) instead of ldap handle (per
1520 session). Bug diagnosis and testing by alxgomz.
1522 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1523 the src/util/ subdirectory.
1525 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1526 renamed to Transport Post Delivery Action by Jeremy Harris, as
1529 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1530 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1531 redis_servers = needs to be configured which will be used by the redis
1532 lookup. Patch from Warren Baker, of The Packet Hub.
1534 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1536 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1537 hostname or reverse DNS when processing a host list. Used suggestions
1538 from multiple comments on this bug.
1540 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1542 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1543 Missed a few lines, added it to make the runtest require no keyboard
1546 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1547 contains upper case chars. Make router use caseful_local_part.
1549 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1550 support when GnuTLS has been built with p11-kit.
1556 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1558 This, or similar/improved, will also be change PP/11 of 4.82.
1564 PP/01 Handle short writes when writing local log-files.
1565 In practice, only affects FreeBSD (8 onwards).
1566 Bugzilla 1053, with thanks to Dmitry Isaikin.
1568 NM/01 Bugzilla 949 - Documentation tweak
1570 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1573 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1575 PP/02 Implemented gsasl authenticator.
1577 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1579 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1580 `pkg-config foo` for cflags/libs.
1582 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1583 with rest of GSASL and with heimdal_gssapi.
1585 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1586 `pkg-config foo` for cflags/libs for the TLS implementation.
1588 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1589 properties get this fed in as external SSF. A number of robustness
1590 and debugging improvements to the cyrus_sasl authenticator.
1592 PP/08 cyrus_sasl server now expands the server_realm option.
1594 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1595 Patch by Jeremy Harris.
1597 PP/10 Added dbmjz lookup type.
1599 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1601 PP/12 MAIL args handles TAB as well as SP, for better interop with
1602 non-compliant senders.
1603 Analysis and variant patch by Todd Lyons.
1605 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1606 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1607 Patch from Dirk Mueller <dmueller@suse.com>
1609 PP/13 tls_peerdn now print-escaped for spool files.
1610 Observed some $tls_peerdn in wild which contained \n, which resulted
1611 in spool file corruption.
1613 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1614 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1615 or write after TLS renegotiation, which otherwise led to messages
1618 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1619 as a tracking header (ie: a signed header comes before the signature).
1620 Patch from Wolfgang Breyha.
1622 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1623 comma-sep list; embedded commas doubled.
1625 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1627 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1629 Report and patch from Dmitry Banschikov.
1631 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1632 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1633 failures. We appear to now support TLS1.1+ with Exim.
1635 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1636 lets Exim select keys and certificates based upon TLS SNI from client.
1637 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1638 before an outbound SMTP session. New log_selector, +tls_sni.
1640 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1641 NULL dereference. Report and patch from Alun Jones.
1643 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1644 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1645 Not seeing resolver debug output on NetBSD, but suspect this is a
1646 resolver implementation change.
1648 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1649 Left warnings. Added "eximon gdb" invocation mode.
1651 PP/21 Defaulting "accept_8bitmime" to true, not false.
1653 PP/22 Added -bw for inetd wait mode support.
1655 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1656 locate the relevant includes and libraries. Made this the default.
1658 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1659 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1661 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1662 This may cause build issues on older platforms.
1664 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1665 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1666 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1667 Added SNI support via GnuTLS too.
1668 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1670 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1672 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1673 Applied second patch from Janne, implementing suggestion to default
1674 multiple-strings-in-record handling to match SPF spec.
1676 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1678 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1679 read-only, out of scope).
1680 Patch from Wolfgang Breyha, report from Stuart Northfield.
1682 PP/29 Fix three issues highlighted by clang analyser static analysis.
1683 Only crash-plausible issue would require the Cambridge-specific
1684 iplookup router and a misconfiguration.
1685 Report from Marcin Mirosław.
1687 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1689 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1690 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1691 As part of this, removing so much warning spew let me fix some minor
1692 real issues in debug logging.
1694 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1695 assignment on my part. Fixed.
1697 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1698 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1699 Janne Snabb (who went above and beyond: thank you).
1701 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1702 string otherwise requires a connection and a bunch more work and it's
1703 relatively easy to get wrong. Should also expose TLS library linkage
1706 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1707 64-bit ${eval} (JH/03).
1709 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1710 GNU libc to support some of the 64-bit stuff, should not lead to
1711 conflicts. Defined before os.h is pulled in, so if a given platform
1712 needs to override this, it can.
1714 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1715 protection layer was required, which is not implemented.
1716 Bugzilla 1254, patch from Wolfgang Breyha.
1718 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1719 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1720 tls_dhparam take prime identifiers. Also unbreak combination of
1721 OpenSSL+DH_params+TLSSNI.
1723 PP/39 Disable SSLv2 by default in OpenSSL support.
1729 PP/01 Solaris build fix for Oracle's LDAP libraries.
1730 Bugzilla 1109, patch from Stephen Usher.
1732 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1734 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1737 TF/02 Fix a couple more cases where we did not log the error message
1738 when unlink() failed. See also change 4.74-TF/03.
1740 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1741 lock up or crash if it happened to be inside a call to libc when it
1742 got a SIGUSR1 from exiwhat.
1744 The SIGUSR1 handler appends the current process status to the process
1745 log which is later printed by exiwhat. It used to use the general
1746 purpose logging code to do this, but several functions it calls are
1747 not safe for signals.
1749 The new output code in the SIGUSR1 handler is specific to the process
1750 log, and simple enough that it's easy to inspect for signal safety.
1751 Removing some special cases also simplifies the general logging code.
1752 Removing the spurious timestamps from the process log simplifies
1755 TF/04 Improved ratelimit ACL condition.
1757 The /noupdate option has been deprecated in favour of /readonly which
1758 has clearer semantics. The /leaky, /strict, and /readonly update modes
1759 are mutually exclusive. The update mode is no longer included in the
1760 database key; it just determines when the database is updated. (This
1761 means that when you upgrade Exim will forget old rate measurements.)
1763 Exim now checks that the per_* options are used with an update mode that
1764 makes sense for the current ACL. For example, when Exim is processing a
1765 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1766 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1767 must specify per_mail/readonly. If you omit the update mode it defaults to
1768 /leaky where that makes sense (as before) or /readonly where required.
1770 The /noupdate option is now undocumented but still supported for
1771 backwards compatibility. It is equivalent to /readonly except that in
1772 ACLs where /readonly is required you may specify /leaky/noupdate or
1773 /strict/noupdate which are treated the same as /readonly.
1775 A useful new feature is the /count= option. This is a generalization
1776 of the per_byte option, so that you can measure the throughput of other
1777 aggregate values. For example, the per_byte option is now equivalent
1778 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1780 The per_rcpt option has been generalized using the /count= mechanism
1781 (though it's more complicated than the per_byte equivalence). When it is
1782 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1783 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1784 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1785 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1786 Note that using per_rcpt with a non-readonly update mode in more than
1787 one ACL will cause the recipients to be double-counted. (The per_mail
1788 and per_byte options don't have this problem.)
1790 The handling of very low rates has changed slightly. If the computed rate
1791 is less than the event's count (usually one) then this event is the first
1792 after a long gap. In this case the rate is set to the same as this event's
1793 count, so that the first message of a spam run is counted properly.
1795 The major new feature is a mechanism for counting the rate of unique
1796 events. The new per_addr option counts the number of different
1797 recipients that someone has sent messages to in the last time period. It
1798 behaves like per_rcpt if all the recipient addresses are different, but
1799 duplicate recipient addresses do not increase the measured rate. Like
1800 the /count= option this is a general mechanism, so the per_addr option
1801 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1802 example, measure the rate that a client uses different sender addresses
1803 with the options per_mail/unique=$sender_address. There are further
1804 details in the main documentation.
1806 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1808 TF/06 Removed a few PCRE remnants.
1810 TF/07 Automatically extract Exim's version number from tags in the git
1811 repository when doing development or release builds.
1813 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1814 Bugzilla 879. Patch from Paul Fisher.
1816 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1817 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1820 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1822 PP/05 Variable $av_failed, true if the AV scanner deferred.
1823 Bugzilla 1078. Patch from John Horne.
1825 PP/06 Stop make process more reliably on build failure.
1826 Bugzilla 1087. Patch from Heiko Schlittermann.
1828 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1829 Bugzilla 1089. Patch from Heiko Schlittermann.
1831 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1832 Bugzilla 1131. Patch from Holger Weiß.
1834 PP/09 Handle IPv6 addresses with SPF.
1835 Bugzilla 860. Patch from Wolfgang Breyha.
1837 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1839 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1842 PP/11 match_* no longer expand right-hand-side by default.
1843 New compile-time build option, EXPAND_LISTMATCH_RHS.
1844 New expansion conditions, "inlist", "inlisti".
1846 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1848 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1850 PP/14 fix log_write() format string regression from TF/03.
1851 Bugzilla 1152. Patch from Dmitry Isaikin.
1857 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1859 PP/02 Harmonised TLS library version reporting; only show if debugging.
1860 Layout now matches that introduced for other libraries in 4.74 PP/03.
1862 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1864 PP/04 New "dns_use_edns0" global option.
1866 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1869 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1870 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1872 TK/01 Updated PolarSSL code to 0.14.2.
1873 Bugzilla 1097. Patch from Andreas Metzler.
1875 PP/07 Catch divide-by-zero in ${eval:...}.
1876 Fixes bugzilla 1102.
1878 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1881 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1882 format-string attack -- SECURITY: remote arbitrary code execution.
1884 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1885 time unintentionally subject to list matching rules, letting the header
1886 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1887 arbitrary string expansion). This allowed for information disclosure.
1889 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1890 INT_MIN/-1 -- value coerced to INT_MAX.
1896 NM/01 Workaround for PCRE version dependency in version reporting
1899 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1900 This fixes portability to compilers other than gcc, notably
1901 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1903 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1904 makefiles for portability to HP-UX and POSIX correctness.
1906 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1907 Also via indented variable definition in the Makefile.
1908 (Debugging by Oliver Heesakkers).
1910 PP/02 Restore caching of spamd results with expanded spamd_address.
1911 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1913 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1914 Improves build reliability. Fix from: Frank Elsner
1916 NM/02 Fix wide character breakage in the rfc2047 coding
1917 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1919 NM/03 Allow underscore in dnslist lookups
1920 Fixes bug 1026. Patch from Graeme Fowler
1922 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1923 Code patches from Adam Ciarcinski of NetBSD.
1925 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1928 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1929 is logged, to avoid truncation. Patch from John Horne.
1931 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1932 Patch from Jakob Hirsch.
1934 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1935 SQL string expansion failure details.
1936 Patch from Andrey Oktyabrski.
1938 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1939 Patch from Simon Arlott.
1941 PP/09 New lookups functionality failed to compile on old gcc which rejects
1942 extern declarations in function scope.
1943 Patch from Oliver Fleischmann
1945 PP/10 Use sig_atomic_t for flags set from signal handlers.
1946 Check getgroups() return and improve debugging.
1947 Fixed developed for diagnosis in bug 927 (which turned out to be
1950 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1951 Patch from Mark Zealey.
1953 PP/12 Bugzilla 1056: Improved spamd server selection.
1954 Patch from Mark Zealey.
1956 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1957 Based on patch from Heiko Schlittermann.
1959 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1960 Patch from Uwe Doering, sign-off by Michael Haardt.
1962 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1963 variable declaration deep within a block. Bug and patch from
1966 PP/15 lookups-Makefile IRIX compatibility coercion.
1968 PP/16 Make DISABLE_DKIM build knob functional.
1970 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1971 Patch by Simon Arlott
1973 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1974 variable argument macros. Our copy now differs from upstream.
1980 TF/01 Failure to get a lock on a hints database can have serious
1981 consequences so log it to the panic log.
1983 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1984 controlled using the smtp_confirmation log selector.
1986 TF/03 Include the error message when we fail to unlink a spool file.
1988 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1989 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1990 for maintaining out-of-tree patches for some time.
1992 PP/01 Bugzilla 139: Documentation and portability issues.
1993 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1994 Handle per-OS dynamic-module compilation flags.
1996 PP/02 Let /dev/null have normal permissions.
1997 The 4.73 fixes were a little too stringent and complained about the
1998 permissions on /dev/null. Exempt it from some checks.
1999 Reported by Andreas M. Kirchwitz.
2001 PP/03 Report version information for many libraries, including
2002 Exim version information for dynamically loaded libraries. Created
2003 version.h, now support a version extension string for distributors
2004 who patch heavily. Dynamic module ABI change.
2006 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2007 privilege escalation vulnerability whereby the Exim run-time user
2008 can cause root to append content of the attacker's choosing to
2011 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2014 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2015 If dropping privileges for untrusted macros, we disabled normal logging
2016 on the basis that it would fail; for the Exim run-time user, this is not
2017 the case, and it resulted in successful deliveries going unlogged.
2018 Fixed. Reported by Andreas Metzler.
2024 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2025 only prepend for the Resent-* case. Fixes regression introduced in
2026 Exim 4.70 by NM/22 for Bugzilla 607.
2028 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2029 increasing numbers of administrators be bitten by this.
2031 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2033 PP/03 Bugzilla 994: added openssl_options main configuration option.
2035 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2037 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2039 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2041 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2042 without a peer certificate, leading to a segfault because of an
2043 assumption that peers always have certificates. Be a little more
2044 paranoid. Problem reported by Martin Tscholak.
2046 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2047 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2048 NB: ClamAV planning to remove STREAM in "middle of 2010".
2049 CL also introduces -bmalware, various -d+acl logging additions and
2050 more caution in buffer sizes.
2052 PP/09 Implemented reverse_ip expansion operator.
2054 PP/10 Bugzilla 937: provide a "debug" ACL control.
2056 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2058 PP/12 Bugzilla 973: Implement --version.
2060 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2062 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2064 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2066 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2067 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2068 ignore trailing whitespace.
2070 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2072 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2075 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2076 Notification from Dr Andrew Aitchison.
2078 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2079 ExtendedDetectionInfo response format.
2080 Notification from John Horne.
2082 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2085 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2086 XSL and documented dependency on system catalogs, with examples of how
2089 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2092 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2093 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2094 configuration file which is writeable by the Exim user or group.
2096 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2097 of configuration files to cover files specified with the -C option if
2098 they are going to be used with root privileges, not just the default
2101 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2102 option (effectively making it always true).
2104 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2105 files to be used while preserving root privileges.
2107 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2108 that rogue child processes cannot use them.
2110 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2111 run-time user, instead of root.
2113 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2114 Exim run-time user without dropping privileges.
2116 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2117 result string, instead of calling string_vformat() twice with the same
2120 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2121 for other users. Others should always drop root privileges if they use
2122 -C on the command line, even for a whitelisted configure file.
2124 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2126 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2132 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2133 $data_path, and $header_path variables; fixed documentation bugs and
2136 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2137 exipick to access non-standard spools, including the "frozen" queue
2140 NM/01 Bugzilla 965: Support mysql stored procedures.
2141 Patch from Alain Williams
2143 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2145 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2146 Patch from Andreas Metzler
2148 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2149 Patch from Kirill Miazine
2151 NM/05 Bugzilla 671: Added umask to procmail example.
2153 JJ/03 installed exipick 20100323.0, fixing doc bug
2155 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2156 directory. Notification and patch from Dan Rosenberg.
2158 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2160 TK/02 Improve log output when DKIM signing operation fails.
2162 MH/01 Treat the transport option dkim_domain as a colon separated
2163 list, not as a single string, and sign the message with each element,
2164 omitting multiple occurences of the same signer.
2166 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2167 Bugzilla 985, 986. Patch by Simon Arlott
2169 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2170 Patch by Simon Arlott
2172 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2173 MBX locking. Notification from Dan Rosenberg.
2179 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2181 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2183 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2185 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2187 NM/04 Bugzilla 915: Flag broken perl installation during build.
2193 TK/01 Added patch by Johannes Berg that expands the main option
2194 "spamd_address" if it starts with a dollar sign.
2196 TK/02 Write list of recipients to X-Envelope-Sender header when building
2197 the mbox-format spool file for content scanning (suggested by Jakob
2200 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2201 (http://www.dcc-servers.net/) support via dccifd. Activated by
2202 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2204 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2205 by Mark Daniel Reidel <mr@df.eu>.
2207 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2208 When building exim an external PCRE library is now needed -
2209 PCRE is a system library on the majority of modern systems.
2210 See entry on PCRE_LIBS in EDITME file.
2212 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2213 conversation. Added nologin parameter to request.
2214 Patch contributed by Kirill Miazine.
2216 TF/01 Do not log submission mode rewrites if they do not change the address.
2218 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2220 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2221 log files in place. Contributed by Roberto Lima.
2223 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2225 TF/03 Bugzilla 615: When checking the local_parts router precondition
2226 after a local_part_suffix or local_part_prefix option, Exim now
2227 does not use the address's named list lookup cache, since this
2228 contains cached lookups for the whole local part.
2230 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2231 Robert Millan. Documentation is in experimental-spec.txt.
2233 TF/04 Bugzilla 668: Fix parallel build (make -j).
2235 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2237 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2238 Patch provided by Jan Srzednicki.
2240 TF/05 Leading white space used to be stripped from $spam_report which
2241 wrecked the formatting. Now it is preserved.
2243 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2244 that they are available at delivery time.
2246 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2248 TF/08 TLS error reporting now respects the incoming_interface and
2249 incoming_port log selectors.
2251 TF/09 Produce a more useful error message if an SMTP transport's hosts
2252 setting expands to an empty string.
2254 NM/06 Bugzilla 744: EXPN did not work under TLS.
2255 Patch provided by Phil Pennock.
2257 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2258 Patch provided by Richard Godbee.
2260 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2261 acl_smtp_notquit, added index entry.
2263 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2264 Patch provided by Eugene Bujak.
2266 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2267 accept(). Patch provided by Maxim Dounin.
2269 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2270 Patch provided by Phil Pennock.
2272 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2274 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2275 Patch provided by Brad "anomie" Jorsch.
2277 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2278 Patch provided by Dean Brooks.
2280 TK/05 Add native DKIM support (does not depend on external libraries).
2282 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2283 Patch provided by Graeme Fowler.
2285 NM/16 Bugzilla 851: Documentation example syntax fix.
2287 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2289 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2292 NM/19 Bugzilla 745: TLS version reporting.
2293 Patch provided by Phil Pennock.
2295 NM/20 Bugzilla 167: bool: condition support.
2296 Patch provided by Phil Pennock.
2298 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2299 clients. Patch provided by Phil Pennock.
2301 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2302 Patch provided by Brad "anomie" Jorsch.
2304 NM/23 Bugzilla 687: Fix misparses in eximstats.
2305 Patch provided by Heiko Schlittermann.
2307 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2308 Patch provided by Heiko Schlittermann.
2310 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2311 plus update to original patch.
2313 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2315 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2316 Patch provided by David Brownlee.
2318 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2320 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2322 NM/30 Bugzilla 888: TLS documentation bugfixes.
2324 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2326 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2327 Unlike the original bugzilla I have changed all shell scripts in src tree.
2329 NM/33 Bugzilla 898: Transport filter timeout fix.
2330 Patch by Todd Rinaldo.
2332 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2333 Patch by Serge Demonchaux.
2335 NM/35 Bugzilla 39: Base64 decode bug fixes.
2336 Patch by Jakob Hirsch.
2338 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2340 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2342 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2344 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2350 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2351 ALT-N's libdkim that I have put here:
2352 http://duncanthrax.net/exim-experimental/
2354 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2355 were called 'true' and it seems that C99 defines that as a reserved
2356 keyword to be used with 'bool' variable types. That means you could
2357 not include C99-style headers which use bools without triggering
2358 build errors in sieve.c.
2360 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2361 as mailq or other aliases. Changed the --help handling significantly
2362 to do whats expected. exim_usage() emits usage/help information.
2364 SC/01 Added the -bylocaldomain option to eximstats.
2366 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2368 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2370 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2376 PH/01 Another patch from the Sieve maintainer.
2378 PH/02 When an IPv6 address is converted to a string for single-key lookup
2379 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2380 dots are used instead of colons so that keys in lsearch files need not
2381 contain colons. This was done some time before quoting was made available
2382 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2383 (notated using the quote facility) so as to distinguish them from IPv4
2384 keys. This meant that lookups for IP addresses in host lists did not work
2385 for iplsearch lookups.
2387 This has been fixed by arranging for IPv6 addresses to be expressed with
2388 colons if the lookup type is iplsearch. This is not incompatible, because
2389 previously such lookups could never work.
2391 The situation is now rather anomalous, since one *can* have colons in
2392 ordinary lsearch keys. However, making the change in all cases is
2393 incompatible and would probably break a number of configurations.
2395 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2398 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2399 conversion specification without a maximum field width, thereby enabling
2400 a rogue spamd server to cause a buffer overflow. While nobody in their
2401 right mind would setup Exim to query an untrusted spamd server, an
2402 attacker that gains access to a server running spamd could potentially
2403 exploit this vulnerability to run arbitrary code as the Exim user.
2405 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2406 $primary_hostname instead of what libspf2 thinks the hosts name is.
2408 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2409 a directory entry by the name of the lookup key. Previously, if a
2410 symlink pointed to a non-existing file or a file in a directory that
2411 Exim lacked permissions to read, a lookup for a key matching that
2412 symlink would fail. Now it is enough that a matching directory entry
2413 exists, symlink or not. (Bugzilla 503.)
2415 PH/03 The body_linecount and body_zerocount variables are now exported in the
2418 PH/04 Added the $dnslist_matched variable.
2420 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2421 This means they are set thereafter only if the connection becomes
2424 PH/06 Added the client_condition to authenticators so that some can be skipped
2425 by clients under certain conditions.
2427 PH/07 The error message for a badly-placed control=no_multiline_responses left
2428 "_responses" off the end of the name.
2430 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2432 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2433 (without spaces) instead of just copying the configuration text.
2435 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2437 PH/11 Added $max_received_linelength.
2439 PH/12 Added +ignore_defer and +include_defer to host lists.
2441 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2442 way in which PCRE > 7.0 is built.
2444 PH/14 Implemented queue_only_load_latch.
2446 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2447 MAIL command. The effect was to mangle the value on 64-bit systems.
2449 PH/16 Another patch from the Sieve maintainer.
2451 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2453 PH/18 If a system quota error occurred while trying to create the file for
2454 a maildir delivery, the message "Mailbox is full" was not appended to the
2455 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2456 only to a quota excession during the actual writing of the file.
2458 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2459 characters?) which causes problems in log lines. The DN values are now
2460 passed through string_printing() before being added to log lines.
2462 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2463 and InterBase are left for another time.)
2465 PH/21 Added message_body_newlines option.
2467 PH/22 Guard against possible overflow in moan_check_errorcopy().
2469 PH/23 POSIX allows open() to be a macro; guard against that.
2471 PH/24 If the recipient of an error message contained an @ in the local part
2472 (suitably quoted, of course), incorrect values were put in $domain and
2473 $local_part during the evaluation of errors_copy.
2479 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2480 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2483 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2484 issue a MAIL command.
2486 PH/02 In an ACL statement such as
2488 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2490 if a client was not listed at all, or was listed with a value other than
2491 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2492 the condition was not true (as it should be), so access was not denied.
2493 The bug was that the ! inversion was incorrectly passed on to the second
2494 item. This has been fixed.
2496 PH/03 Added additional dnslists conditions == and =& which are different from
2497 = and & when the dns lookup returns more than one IP address.
2499 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2500 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2502 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2503 FSYNC, which compiles an option called disable_fsync that allows for
2504 bypassing fsync(). The documentation is heavily laced with warnings.
2506 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2508 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2509 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2510 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2511 including adding "make clean"; (3) Added -fPIC when compiling the test
2512 dynamically loaded module, to get rid of a warning.
2514 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2515 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2516 = 0s. The bug is otherwise harmless.
2518 PH/07 There was a bug in the dovecot authenticator such that the value of
2519 $auth1 could be overwritten, and so not correctly preserved, after a
2520 successful authentication. This usually meant that the value preserved by
2521 the server_setid option was incorrect.
2523 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2525 PH/09 Installed PCRE release 7.0.
2527 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2528 run for batched SMTP input. It is now run at the start of every message
2529 in the batch. While fixing this I discovered that the process information
2530 (output by running exiwhat) was not always getting set for -bs and -bS
2531 input. This is fixed, and it now also says "batched" for BSMTP.
2533 PH/11 Added control=no_pipelining.
2535 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2536 patch, slightly modified), and move the expansion of helo_data till after
2537 the connection is made in the smtp transport (so it can use these
2540 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2542 PH/14 Added log_selector = +pid.
2544 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2546 PH/16 Add ${if forany and ${if forall.
2548 PH/17 Added dsn_from option to vary the From: line in DSNs.
2550 PH/18 Flush SMTP output before performing a callout, unless control =
2551 no_callout_flush is set.
2553 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2554 was true (the default) a successful delivery failed to delete the retry
2555 item, thus causing premature timeout of the address. The bug is now
2558 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2560 PH/21 Long custom messages for fakedefer and fakereject are now split up
2561 into multiline responses in the same way that messages for "deny" and
2562 other ACL rejections are.
2564 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2565 with slight modification.
2567 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2568 draft, changing the syntax and factoring some duplicate code".
2570 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2571 for deliveries of the second and subsequent messages over the same SMTP
2574 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2575 ${reduce, with only minor "tidies".
2577 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2579 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2580 expansion side effects.
2582 PH/27 When a message times out after an over-quota error from an Exim-imposed
2583 quota, the bounce message says "mailbox is full". This message was not
2584 being given when it was a system quota that was exceeded. It now should
2587 MH/03 Made $recipients available in local_scan(). local_scan() already has
2588 better access to the recipient list through recipients_list[], but
2589 $recipients can be useful in postmaster-provided expansion strings.
2591 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2592 in the case of a MAIL command with additional options following the
2593 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2594 were accidentally chopped off.
2596 PH/29 SMTP synchronization checks are implemented when a command is read -
2597 there is a check that no more input is waiting when there shouldn't be
2598 any. However, for some commands, a delay in an ACL can mean that it is
2599 some time before the response is written. In this time, more input might
2600 arrive, invalidly. So now there are extra checks after an ACL has run for
2601 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2602 pipelining has not been advertised.
2604 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2606 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2607 returned in the SMTP response when smtp_return_error_details was false.
2608 This has been fixed.
2610 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2611 instead of the C I/O that was originally supplied, because problems were
2612 reported on Solaris.
2614 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2615 Exim which did not show up earlier: it was assuming that a call to
2616 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2617 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2618 was a macro that became an assignment, so it seemed to work. This has
2619 changed to a proper function call with a void return, hence the compile
2620 error. Exim's code has been fixed.
2622 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2625 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2627 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2629 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2630 because it turns out to be too big or there is a timeout) there is no
2631 "Completed" line in the log. When some messages of this type were
2632 selected by exigrep, they were listed as "not completed". Others were
2633 picked up by some special patterns. I have improved the selection
2634 criteria to be more general.
2636 PH/38 The host_find_failed option in the manualroute router can now be set
2637 to "ignore", to completely ignore a host whose IP address cannot be
2638 found. If all hosts are ignored, the behaviour is controlled by the new
2639 host_all_ignored option.
2641 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2642 homing or because of multiple MX records with /mx) generated more than
2643 one IP address, and the following item turned out to be the local host,
2644 all the secondary addresses of the first item were incorrectly removed
2645 from the list, along with the local host and any following hosts (which
2646 is what is supposed to happen).
2648 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2649 whoever called Exim into the -H file. In the case of the daemon it was
2650 behaving confusingly. When first started, it used values for whoever
2651 started the daemon, but after a SIGHUP it used the Exim user (because it
2652 calls itself on a restart). I have changed the code so that it now always
2655 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2656 message are rejected with the same error (e.g. no authentication or bad
2657 sender address), and a DATA command is nevertheless sent (as can happen
2658 with PIPELINING or a stupid MUA), the error message that was given to the
2659 RCPT commands is included in the rejection of the DATA command. This is
2660 intended to be helpful for MUAs that show only the final error to their
2663 PH/42 Another patch from the Sieve maintainer.
2665 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2666 Eximstats - Fixed some broken HTML links and added missing column headers
2668 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2669 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2671 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2673 PH/43 Yet another patch from the Sieve maintainer.
2675 PH/44 I found a way to check for a TCP/IP connection going away before sending
2676 the response to the final '.' that terminates a message, but only in the
2677 case where the client has not sent further data following the '.'
2678 (unfortunately, this is allowed). However, in many cases there won't be
2679 any further data because there won't be any more messages to send. A call
2680 to select() can be used: if it shows that the input is "ready", there is
2681 either input waiting, or the socket has been closed. An attempt to read
2682 the next input character can distinguish the two cases. Previously, Exim
2683 would have sent an OK response which the client would never have see.
2684 This could lead to message repetition. This fix should cure that, at
2685 least in a lot of common cases.
2687 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2688 advertised in response to EHLO.
2694 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2695 fixed by 4.65/MH/01 (is this a record?) are fixed:
2697 (i) An empty string was always treated as zero by the numeric comparison
2698 operators. This behaviour has been restored.
2700 (ii) It is documented that the numeric comparison operators always treat
2701 their arguments as decimal numbers. This was broken in that numbers
2702 starting with 0 were being interpreted as octal.
2704 While fixing these problems I realized that there was another issue that
2705 hadn't been noticed. Values of message_size_limit (both the global option
2706 and the transport option) were treated as octal if they started with 0.
2707 The documentation was vague. These values are now always treated as
2708 decimal, and I will make that clear in the documentation.
2714 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2715 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2718 MH/01 Don't check that the operands of numeric comparison operators are
2719 integers when their expansion is in "skipping" mode (fixes bug
2720 introduced by 4.64-PH/07).
2722 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2723 child addresses, Exim now panics and dies. Previously, because the count
2724 is held in a short int, deliveries were likely to be lost. As such a
2725 large number of recipients for a single message is ridiculous
2726 (performance will be very, very poor), I have chosen to impose a limit
2727 rather than extend the field.
2733 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2734 leftover -K file (the existence of which was triggered by #402).
2735 While we were at it, introduced process PID as part of the -K
2736 filename. This should rule out race conditions when creating
2739 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2740 processing considerably. Previous code took too long for large mails,
2741 triggering a timeout which in turn triggers #401.
2743 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2744 in the DK code in transports.c. sendfile() is not really portable,
2745 hence the _LINUX specificness.
2747 TF/01 In the add_headers option to the mail command in an Exim filter,
2748 there was a bug that Exim would claim a syntax error in any
2749 header after the first one which had an odd number of characters
2752 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2753 callout verification, Exim cached a "reject" for the entire domain. This
2754 is correct for most verifications, but it is not correct for a recipient
2755 verification with use_sender or use_postmaster set, because in that case
2756 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2757 case of MAIL FROM:<> rejection from other early rejections (e.g.
2758 rejection of HELO). When verifying a recipient using a non-null MAIL
2759 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2760 Whatever the result of the callout, the value of the domain cache is
2761 left unchanged (for any other kind of callout, getting as far as trying
2762 RCPT means that the domain itself is ok).
2764 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2767 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2768 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2769 session, the daemon ignores ECONNECT errors and logs others; it now
2770 ignores EPIPE as well.
2772 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2773 (quoted-printable decoding).
2775 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2776 later the small subsequent patch to fix an introduced bug.
2778 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2780 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2782 PH/08 An error is now given if message_size_limit is specified negative.
2784 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2785 to be given (somewhat) arbitrary names.
2787 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2790 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2791 miscellaneous code fixes
2793 PH/10 Added the log_reject_target ACL modifier to specify where to log
2796 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2797 hostname. This is wrong, because it relates to the incoming message (and
2798 probably the interface on which it is arriving) and not to the outgoing
2799 callout (which could be using a different interface). This has been
2800 changed to use the value of the helo_data option from the smtp transport
2801 instead - this is what is used when a message is actually being sent. If
2802 there is no remote transport (possible with a router that sets up host
2803 addresses), $smtp_active_hostname is used.
2805 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2806 tweaks were necessary in order to get it to work (see also 21 below):
2807 (a) The code assumed that strncpy() returns a negative number on buffer
2808 overflow, which isn't the case. Replaced with Exim's string_format()
2810 (b) There were several signed/unsigned issues. I just did the minimum
2811 hacking in of casts. There is scope for a larger refactoring.
2812 (c) The code used strcasecmp() which is not a standard C function.
2813 Replaced with Exim's strcmpic() function.
2814 (d) The code set only $1; it now sets $auth1 as well.
2815 (e) A simple test gave the error "authentication client didn't specify
2816 service in request". It would seem that Dovecot has changed its
2817 interface. Fortunately there's a specification; I followed it and
2818 changed what the client sends and it appears to be working now.
2820 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2823 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2824 address A is aliased to B and C, where B exists and C does not. Without
2825 -v the output is "A verified" because verification stops after a
2826 successful redirection if more than one address is generated. However,
2827 with -v the child addresses are also verified. Exim was outputting "A
2828 failed to verify" and then showing the successful verification for C,
2829 with its parentage. It now outputs "B failed to verify", showing B's
2830 parentage before showing the successful verification of C.
2832 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2833 look up a TXT record in a specific list after matching in a combined
2836 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2837 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2838 they consult the DNS. I had assumed they would set it the way they
2839 wanted; and indeed my experiments on Linux seem to show that in some
2840 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2841 To be on the safe side, however, I have now made the interface to
2842 host_find_byname() similar to host_find_bydns(), with an argument
2843 containing the DNS resolver options. The host_find_byname() function now
2844 sets these options at its start, just as host_find_bydns() does. The smtp
2845 transport options dns_qualify_single and dns_search_parents are passed to
2846 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2847 of host_find_byname() use the default settings of RES_DEFNAMES
2848 (qualify_single) but not RES_DNSRCH (search_parents).
2850 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2851 spool_read_header() do less string testing, by means of a preliminary
2852 switch on the second character of optional "-foo" lines. (This is
2853 overdue, caused by the large number of possibilities that now exist.
2854 Originally there were few.) While I was there, I also converted the
2855 str(n)cmp tests so they don't re-test the leading "-" and the first
2856 character, in the hope this might squeeze out yet more improvement.
2858 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2859 flag allowing group syntax was set by the header_syntax check but not
2860 turned off, possible causing trouble later; (2) The flag was not being
2861 set at all for the header_verify test, causing "group"-style headers to
2862 be rejected. I have now set it in this case, and also caused header_
2863 verify to ignore an empty address taken from a group. While doing this, I
2864 came across some other cases where the code for allowing group syntax
2865 while scanning a header line wasn't quite right (mostly, not resetting
2866 the flag correctly in the right place). These bugs could have caused
2867 trouble for malformed header lines. I hope it is now all correct.
2869 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2870 with the "reply" argument non-NULL. The code, however (which originally
2871 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2872 but it didn't always do it. This confused somebody who was copying the
2873 code for some other use. I have removed all the tests.
2875 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2876 feature that was used to support insecure browsers during the U.S. crypto
2877 embargo. It requires special client support, and Exim is probably the
2878 only MTA that supported it -- and would never use it because real RSA is
2879 always available. This code has been removed, because it had the bad
2880 effect of slowing Exim down by computing (never used) parameters for the
2881 RSA_EXPORT functionality.
2883 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2884 authenticator to fail if there's a tab character in the incoming data
2885 (there should never be unless someone is messing about, as it's supposed
2886 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2887 if the connection is using TLS or if the remote IP is the same as the
2888 local IP, and the "valid-client-cert option" if a client certificate has
2891 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2892 authenticators. This can be used for authorization after authentication
2893 succeeds. (In the case of plaintext, it servers for both authentication
2896 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2897 if any retry times were supplied.
2899 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2900 connection, where there is no client IP address to check. In this
2901 situation, the verify now always succeeds.
2903 PH/25 Applied John Jetmore's -Mset patch.
2905 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2907 PH/27 In a string expansion for a processed (not raw) header when multiple
2908 headers of the same name were present, leading whitespace was being
2909 removed from all of them, but trailing whitespace was being removed only
2910 from the last one. Now trailing whitespace is removed from each header
2911 before concatenation. Completely empty headers in a concatenation (as
2912 before) are ignored.
2914 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2915 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2917 PH/29 [Removed. This was a change that I later backed out, and forgot to
2918 correct the ChangeLog entry (that I had efficiently created) before
2919 committing the later change.]
2921 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2922 address errors (4xx response to RCPT) over the same connection as other
2923 messages routed to the same hosts. Such deliveries are always "forced",
2924 so retry times are not inspected. This resulted in far too many retries
2925 for the affected addresses. The effect occurred only when there were more
2926 hosts than the hosts_max_try setting in the smtp transport when it had
2927 the 4xx errors. Those hosts that it had tried were not added to the list
2928 of hosts for which the message was waiting, so if all were tried, there
2929 was no problem. Two fixes have been applied:
2931 (i) If there are any address or message errors in an SMTP delivery, none
2932 of the hosts (tried or untried) are now added to the list of hosts
2933 for which the message is waiting, so the message should not be a
2934 candidate for sending over the same connection that was used for a
2935 successful delivery of some other message. This seems entirely
2936 reasonable: after all the message is NOT "waiting for some host".
2937 This is so "obvious" that I'm not sure why it wasn't done
2938 previously. Hope I haven't missed anything, but it can't do any
2939 harm, as the worst effect is to miss an optimization.
2941 (ii) If, despite (i), such a delivery is accidentally attempted, the
2942 routing retry time is respected, so at least it doesn't keep
2943 hammering the server.
2945 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2946 in ${readsocket because some servers need this prod.
2948 PH/32 Added some extra debug output when updating a wait-xxx database.
2950 PH/33 The hint "could be header name not terminated by colon", which has been
2951 given for certain expansion errors for a long time, was not being given
2952 for the ${if def:h_colon_omitted{... case.
2954 PH/34 The spec says: "With one important exception, whenever a domain list is
2955 being scanned, $domain contains the subject domain." There was at least
2956 one case where this was not true.
2958 PH/35 The error "getsockname() failed: connection reset by peer" was being
2959 written to the panic log as well as the main log, but it isn't really
2960 panic-worthy as it just means the connection died rather early on. I have
2961 removed the panic log writing for the ECONNRESET error when getsockname()
2964 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2965 runs only) independently of the message's sender address. This meant
2966 that, if the 4xx error was in fact related to the sender, a different
2967 message to the same recipient with a different sender could confuse
2968 things. In particular, this can happen when sending to a greylisting
2969 server, but other circumstances could also provoke similar problems.
2970 I have changed the default so that the retry time for these errors is now
2971 based a combination of the sender and recipient addresses. This change
2972 can be overridden by setting address_retry_include_sender=false in the
2975 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2976 remote server are returned as part of bounce messages. This was not
2977 happening for LMTP over a pipe (the lmtp transport), but now it is the
2978 same for both kinds of LMTP.
2980 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2981 in header lines that were in fact CNAMEs. This is no longer the case.
2983 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2984 and queue runs started by the daemon processed all messages. This has
2985 been fixed so that -R and -S can now usefully be given with -q<time>.
2987 PH/40 Import PCRE release 6.7 (fixes some bugs).
2989 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2991 PH/42 Give an error if -q is specified more than once.
2993 PH/43 Renamed the variables $interface_address and $interface_port as
2994 $received_ip_address and $received_port, to make it clear that these
2995 values apply to message reception, and not to the outgoing interface when
2996 a message is delivered. (The old names remain recognized, of course.)
2998 PH/44 There was no timeout on the connect() call when using a Unix domain
2999 socket in the ${readsocket expansion. There now is.
3001 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3002 be meaningful with "accept".
3004 SC/01 Eximstats V1.43
3005 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3007 SC/02 Eximstats V1.44
3008 Use a glob alias rather than an array ref in the generated
3009 parser. This improves both readability and performance.
3011 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3012 Collect SpamAssassin and rejection statistics.
3013 Don't display local sender or destination tables unless
3014 there is data to show.
3015 Added average volumes into the top table text output.
3017 SC/04 Eximstats V1.46
3018 Collect data on the number of addresses (recipients)
3019 as well as the number of messages.
3021 SC/05 Eximstats V1.47
3022 Added 'Message too big' to the list of mail rejection
3023 reasons (thanks to Marco Gaiarin).
3025 SC/06 Eximstats V1.48
3026 Mainlog lines which have GMT offsets and are too short to
3027 have a flag are now skipped.
3029 SC/07 Eximstats V1.49 (Alain Williams)
3030 Added the -emptyok flag.
3032 SC/08 Eximstats V1.50
3033 Fixes for obtaining the IP address from reject messages.
3035 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3036 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3037 whitespace changes from 4.64-PH/27
3039 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3042 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3043 are found, allow negative numbers in numeric criteria)
3045 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3047 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3048 to match changes made in 4.64-PH/43
3050 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3052 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3053 "domain" is actually an IP address, and force a failure. This locks out
3054 those revolvers/nameservers that support "A-for-A" lookups, in
3055 contravention of the specifications.
3057 PH/48 When a host name was looked up from an IP address, and the subsequent
3058 forward lookup of the name timed out, the host name was left in
3059 $sender_host_name, contrary to the specification.
3061 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3062 restricted to single-key lookups, Exim was not diagnosing an error if
3063 * or *@ was used with a query-style lookup.
3065 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3067 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3068 long ago, but noone interested enough thought of it. Let's just say that
3069 the "1.1" means that there are some new functions that weren't there at
3070 some point in the past.
3072 PH/51 Error processing for expansion failure of helo_data from an smtp
3073 transport during callout processing was broken.
3075 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3076 tested/used via the -bh/-bhc/-bs options.
3078 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3079 bug, fixed in subsequent PCRE releases).
3081 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3082 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3084 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3090 SC/01 Use a glob alias rather than an array ref in eximstats generated
3091 parser. This improves both readability and performance.
3093 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3094 Don't display local sender or destination tables in eximstats unless
3095 there is data to show.
3096 Added average volumes into the eximstats top table text output.
3098 SC/03 Collect data on the number of addresses (recipients) as well
3099 as the number of messages in eximstats.
3101 TF/01 Correct an error in the documentation for the redirect router. Exim
3102 does (usually) call initgroups() when daemonizing.
3104 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3105 with consistent privilege compared to when running as a daemon.
3107 TF/03 Note in the spec that $authenticated_id is not set for local
3108 submissions from trusted users.
3110 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3111 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3113 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3114 by adding some example configuration directives to the default
3115 configuration file. A little bit of work is required to uncomment the
3116 directives and define how usernames and passwords are checked, but
3117 there is now a framework to start from.
3119 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3120 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3121 without this. I don't know how relevant this is to other LDAP libraries.
3123 PH/02 Add the verb name to the "unknown ACL verb" error.
3125 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3127 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3129 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3130 directory not expanded when it should be if an expanded home directory
3131 was set for the address (which is overridden by the transport).
3133 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3136 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3137 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3138 because it is too late at that time, and has no effect.
3140 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3141 security issue with \' (bugzilla #107). I could not use the
3142 PQescapeStringConn() function, because it needs a PGconn value as one of
3145 PH/08 When testing addresses using -bt, indicate those final addresses that
3146 are duplicates that would not cause an additional delivery. At least one
3147 person was confused, thinking that -bt output corresponded to deliveries.
3148 (Suppressing duplicates isn't a good idea as you lose the information
3149 about possibly different redirections that led to the duplicates.)
3151 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3152 systems where poll() doesn't work, in particular OS X.
3154 PH/10 Added more information to debugging output for retry time not reached.
3156 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3157 operations in malware.c.
3159 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3162 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3163 syslog_duplication set false, log lines that would normally be written
3164 both the the main log and to the reject log were not written to syslog at
3167 PH/14 In the default configuration, change the use of "message" in ACL warn
3168 statements to "add_header".
3170 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3171 not followed by a command (e.g. "seen endif").
3173 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3174 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3177 PH/17 Added extra conditions to the default value of delay_warning_condition
3181 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3182 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3183 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3186 The Auto-Submitted: and various List- headers are standardised, whereas I
3187 don't think Precedence: ever was.
3189 PH/18 Refactored debugging code in route_finduser() to show more information,
3190 in particular, the error code if getpwnam() issues one.
3192 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3193 This is apparently needed in addition to the PH/07 change above to avoid
3194 any possible encoding problems.
3196 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3197 but not after initializing Perl.
3199 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3200 output them only if debugging. By default they are written stderr,
3201 apparently, which is not desirable.
3203 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3206 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3209 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3211 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3212 authenticated or an ident call has been made. Suppress the default
3213 values for $authenticated_id and $authenticated_sender (but permit -oMai
3214 and -oMas) when testing with -bh.
3216 PH/24 Re-jigged the order of the tests in the default configuration so that the
3217 tests for valid domains and recipients precede the DNS black list and CSA
3218 tests, on the grounds that those ones are more expensive.
3220 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3221 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3222 This bug exists in every version of Exim that I still have, right back to
3225 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3226 However, an attempt to turn on case-sensitivity in a regex key by
3227 including (?-i) didn't work because the subject string was already
3228 lowercased, and the effects were non-intuitive. It turns out that a
3229 one-line patch can be used to allow (?-i) to work as expected.
3235 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3236 other effects) broke the use of negated acl sub-conditions.
3238 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3241 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3242 "Deny" causes Exim to reject the incoming connection with a 554 error.
3243 Unfortunately, if there is a major crisis, such as a disk failure,
3244 tcp-wrappers gives "deny", whereas what one would like would be some
3245 kind of temporary error. A kludge has been added to help with this.
3246 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3247 554 error is used if errno is still zero or contains ENOENT (which occurs
3248 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3251 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3253 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3254 errors. Otherwise a message that provokes a temporary error (when other
3255 messages do not) can cause a whole host to time out.
3257 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3258 addresses were routed directly to files or pipes from a redirect router.
3259 File deliveries just didn't batch; pipe deliveries might have suffered
3262 PH/06 A failure to get a lock for a hints database would erroneously always say
3263 "Failed to get write lock", even when it was really a read lock.
3265 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3266 of 0600. This has been changed to use the value of the lockfile_mode
3267 option (which defaults to 0600).
3269 PH/08 Applied small patch from the Sieve maintainer.
3271 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3272 folder from quota calculations, a direct delivery into this folder messed
3273 up the contents of the maildirsize file. This was because the regex was
3274 used only to exclude .Trash (or whatever) when the size of the mailbox
3275 was calculated. There was no check that a delivery was happening into an
3276 excluded directory. This bug has been fixed by ignoring all quota
3277 processing for deliveries into excluded directories.
3279 PH/10 Added the maildirfolder_create_regex option to appendfile.
3285 PH/01 The code for finding all the local interface addresses on a FreeBSD
3286 system running IPv6 was broken. This may well have applied to all BSD
3287 systems, as well as to others that have similar system calls. The broken
3288 code found IPv4 interfaces correctly, but gave incorrect values for the
3289 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3290 that it would not match correctly against @[] and not recognize the IPv6
3293 PH/02 The ipliteral router was not recognizing addresses of the form user@
3294 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3296 PH/03 Added disable_ipv6.
3298 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3299 decoded form, because it is most often used to construct To: headers
3300 lines in autoreplies, and the decoded form may well be syntactically
3301 invalid. However, $reply_address has leading white space removed, and all
3302 newlines turned into spaces so that the autoreply transport does not
3305 PH/05 If group was specified without a user on a router, and no group or user
3306 was specified on a transport, the group from the router was ignored.
3308 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3309 for visible compile-time settings that can be used to change these
3310 numbers, for those that want even more. Backwards compatibility with old
3311 spool files has been maintained. However, going back to a previous Exim
3312 release will lost any variables that are in spool files.
3314 PH/07 Two small changes when running in the test harness: increase delay when
3315 passing a TCP/IP connection to a new process, in case the original
3316 process has to generate a bounce, and remove special handling of
3317 127.0.0.2 (sic), which is no longer necessary.
3319 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3320 be the same on different OS.
3322 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3325 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3326 whether --show-vars was specified or not
3328 JJ/02 exipick: Added support for new ACL variable spool format introduced
3331 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3332 syntactically invalid From: or Reply-to: line, and a filter used this to
3333 generate an autoreply, and therefore failed to obtain an address for the
3334 autoreply, Exim could try to deliver to a non-existent relative file
3335 name, causing unrelated and misleading errors. What now happens is that
3336 it logs this as a hard delivery error, but does not attempt to create a
3339 PH/11 The exinext utility has a -C option for testing purposes, but although
3340 the given file was scanned by exinext itself; it wasn't being passed on
3341 when Exim was called.
3343 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3344 an end-of-file indication when reading a command response.
3346 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3347 compiled. In many other places in Exim, IPv6 addresses are always
3348 recognized, so I have changed this. It also means that IPv4 domain
3349 literals of the form [IPV4:n.n.n.n] are now always recognized.
3351 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3352 used if the router is not running as root, for example, when verifying at
3353 ACL time, or when using -bh. The debugging output from this situation was
3354 non-existent - all you got was a failure to exec. I have made two
3357 (a) Failures to set uid/gid, the current directory, or a process leader
3358 in a subprocess such as that created by queryprogram now generate
3359 suitable debugging output when -d is set.
3361 (b) The queryprogram router detects when it is not running as root,
3362 outputs suitable debugging information if -d is set, and then runs
3363 the subprocess without attempting to change uid/gid.
3365 PH/15 Minor change to Makefile for building test_host (undocumented testing
3368 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3369 additional section of a DNS packet that returns MX or SRV records.
3370 Instead, it always explicitly searches for A/AAAA records. This avoids
3371 major problems that occur when a DNS server includes only records of one
3372 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3373 fixed another bug: if SRV records were looked up and the corresponding
3374 address records were *not* found in the additional section, the port
3375 values from the SRV records were lost.
3377 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3378 using the correct key (the original address) when searching the retry
3379 rules in order to find which one to use for generating the retry hint.
3381 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3382 adding the default one. Similarly, if it contains a Reply-To: header, the
3383 errors_reply_to option, if set, is not used.
3385 PH/19 When calculating a retry time, Exim used to measure the "time since
3386 failure" by looking at the "first failed" field in the retry record. Now
3387 it does not use this if it is later than than the arrival time of the
3388 message. Instead it uses the arrival time. This makes for better
3389 behaviour in cases where some deliveries succeed, thus re-setting the
3390 "first failed" field. An example is a quota failure for a huge message
3391 when small messages continue to be delivered. Without this change, the
3392 "time since failure" will always be short, possible causing more frequent
3393 delivery attempts for the huge message than are intended.
3394 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3396 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3397 $1, $2, $3) because the numerical variables can be reset during some
3398 expansion items (e.g. "match"), thereby losing the authentication data.
3400 PH/21 Make -bV show the size of off_t variables so that the test suite can
3401 decide whether to run tests for quotas > 2G.
3403 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3404 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3405 filecount value is greater than 2G or if a quota value is greater than 2G
3406 on a system where the size of off_t is not greater than 4, a panic error
3409 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3410 never match. The debug and -bh output now contains an explicit error
3411 message indicating a malformed IPv4 address or mask.
3413 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3414 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3415 PH/23 above applies.
3417 PH/25 Do not write to syslog when running in the test harness. The only
3418 occasion when this arises is a failure to open the main or panic logs
3419 (for which there is an explicit test).
3421 PH/26 Added the /no_tell option to "control=freeze".
3423 PH/27 If a host name lookup failed very early in a connection, for example, if
3424 the IP address matched host_lookup and the reverse lookup yielded a name
3425 that did not have a forward lookup, an error message of the form "no IP
3426 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3427 could be logged. Now it outputs the IP address instead of "NULL".
3429 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3430 allows the sender and the authenticated sender to be set when
3431 submitting a message from within Exim. Since child_open_exim() is
3432 documented for local_scan(), the new function should be too.
3434 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3435 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3436 results in an empty string is now treated as unset.
3438 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3440 PH/31 Added sender_verify_fail logging option.
3442 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3443 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3444 tidied the source and removed it altogether.
3446 PH/33 When a queue run was abandoned because the load average was too high, a
3447 log line was always written; now it is written only if the queue_run log
3448 selector is set. In addition, the log line for abandonment now contains
3449 information about the queue run such as the pid. This is always present
3450 in "start" and "stop" lines but was omitted from the "abandon" line.
3452 PH/34 Omit spaces between a header name and the colon in the error message that
3453 is given when verify = headers_syntax fails (if there are lots of them,
3454 the message gets confusing).
3456 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3457 names, as there are now some PTR records that contain slashes. This check
3458 is only to protect against broken name servers that fall over on strange
3459 characters, so the fact that it applies to all lookups doesn't matter.
3461 PH/36 Now that the new test suite is complete, we can remove some of the
3462 special code in Exim that was needed for the old test suite. For example,
3463 sorting DNS records because real resolvers return them in an arbitrary
3464 order. The new test suite's fake resolver always returns records in the
3467 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3468 bounces) except when queue_only is set, to avoid logging races between
3469 the different processes.
3471 PH/38 Panic-die if .include specifies a non-absolute path.
3473 PH/39 A tweak to the "H" retry rule from its user.
3475 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3476 a label. They prevented compilation on older perls.
3478 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3479 a warning to be raised on newish perls.
3481 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3482 on queue. Changes to match documented behaviour of showing count of
3483 messages matching specified criteria.
3485 PH/40 Changed the default ident timeout from 30s to 5s.
3487 PH/41 Added support for the use of login_cap features, on those BSD systems
3488 that have them, for controlling the resources used by pipe deliveries.
3490 PH/42 The content-scanning code uses fopen() to create files in which to put
3491 message data. Previously it was not paying any attention to the mode of
3492 the files. Exim runs with umask(0) because the rest of the code creates
3493 files with open(), and sets the required mode explicitly. Thus, these
3494 files were ending up world-writeable. This was not a big issue, because,
3495 being within the spool directory, they were not world-accessible. I have
3496 created a function called modefopen, which takes an additional mode
3497 argument. It sets umask(777), creates the file, chmods it to the required
3498 mode, then resets the umask. All the relevant calls to fopen() in the
3499 content scanning code have been changed to use this function.
3501 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3502 to 24 hours. This avoids potential overflow problems when processing G
3503 and H retry rules. I suspect nobody ever tinkers with this value.
3505 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3507 PH/45 When the plaintext authenticator is running as a client, the server's
3508 challenges are checked to ensure they are valid base64 strings. By
3509 default, the authentication attempt is cancelled if an invalid string is
3510 received. Setting client_ignore_invalid_base64 true ignores these errors.
3511 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3512 they are received. Thus, the responses can be made to depend on the
3513 challenges. If an invalid string is ignored, an empty string is placed in
3516 PH/46 Messages that are created by the autoreply transport now contains a
3517 References: header, in accordance with RFCs 2822 and 3834.
3519 PH/47 Added authenticated_sender_force to the smtp transport.
3521 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3523 PH/49 Installed latest patch from the Sieve maintainer.
3525 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3526 was also set, the appendfile transport was unnecessarily scanning a
3527 directory of message files (e.g. for maildir delivery) to find the count
3528 of files (along with the size), even though it did not need this
3529 information. It now does the scan only if it needs to find either the
3530 size of the count of files.
3532 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3534 PH/52 Two bugs concerned with error handling when the smtp transport is
3537 (i) Exim was not creating retry information for temporary errors given
3538 for individual recipients after the DATA command when the smtp transport
3539 was used in LMTP mode. This meant that they could be retried too
3540 frequently, and not timed out correctly.
3542 (ii) Exim was setting the flag that allows error details to be returned
3543 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3544 recipients that were returned after the DATA command.
3546 PH/53 This is related to PH/52, but is more general: for any failing address,
3547 when detailed error information was permitted to be returned to the
3548 sender, but the error was temporary, then after the final timeout, only
3549 "retry timeout exceeded" was returned. Now it returns the full error as
3550 well as "retry timeout exceeded".
3552 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3553 do this, and (what is worse) MTAs that accept it.
3555 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3556 will now be deprecated.
3558 PH/56 New os.c-cygwin from the Cygwin maintainer.
3560 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3561 formats (previously only available in exim formats via -bpr, -bpru,
3562 and -bpra. Now also available in native and exiqgrep formats)
3564 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3565 with very large, slow to parse queues
3567 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3569 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3571 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3572 responses to authentication challenges, though it was showing the
3573 challenges; (ii) I've removed the CR characters from the debug output for
3576 PH/58 Allow for the insertion of a newline as well as a space when a string
3577 is turned into more than one encoded-word during RFC 2047 encoding. The
3578 Sieve code now uses this.
3580 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3581 data_4xx, lost_connection, tls_required.
3583 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3584 message was being sent as an SMTP response.
3586 PH/61 Add -l and -k options to exicyclog.
3588 PH/62 When verifying, if an address was redirected to one new address, so that
3589 verification continued, and the new address failed or deferred after
3590 having set something in $address_data, the value of $address_data was not
3591 passed back to the ACL. This was different to the case when no
3592 redirection occurred. The value is now passed back in both cases.
3594 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3595 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3596 use login_cap.h, so on its own it isn't the distinguishing feature. The
3597 new name refers directly to the setclassresources() function.
3599 PH/65 Added configuration files for NetBSD3.
3601 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3603 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3604 is preferred over IPv4.
3606 PH/68 The bounce_return_message and bounce_return_body options were not being
3607 honoured for bounces generated during the reception of non-SMTP messages.
3608 In particular, this applied to messages rejected by the ACL. This bug has
3609 been fixed. However, if bounce_return_message is true and bounce_return_
3610 body is false, the headers that are returned for a non-SMTP message
3611 include only those that have been read before the error was detected.
3612 (In the case of an ACL rejection, they have all been read.)
3614 PH/69 The HTML version of the specification is now built in a directory called
3615 spec_html instead of spec.html, because the latter looks like a path with
3616 a MIME-type, and this confuses some software.
3618 PH/70 Catch two compiler warnings in sieve.c.
3620 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3621 function verify_get_ident() calls ip_connect() to connect a socket, but
3622 if the "connect()" function timed out, ip_connect() used to close the
3623 socket. However, verify_get_ident() also closes the socket later, and in
3624 between Exim writes to the log, which may get opened at this point. When
3625 the socket was closed in ip_connect(), the log could get the same file
3626 descriptor number as the socket. This naturally causes chaos. The fix is
3627 not to close the socket in ip_connect(); the socket should be closed by
3628 the function that creates it. There was only one place in the code where
3629 this was missing, in the iplookup router, which I don't think anybody now
3630 uses, but I've fixed it anyway.
3632 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3633 well as to direct DNS lookups. Otherwise the handling of names in host
3634 lists is inconsistent and therefore confusing.
3640 PH/01 Two changes to the default runtime configuration:
3642 (1) Move the checks for relay_from_hosts and authenticated clients from
3643 after to before the (commented out) DNS black list checks.
3645 (2) Add control=submission to the relay_from_hosts and authenticated
3646 clients checks, on the grounds that messages accepted by these
3647 statements are most likely to be submissions.
3649 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3651 (1) Generate an error if the third argument for the ${prvs expansion is
3654 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3657 (3) Reset the variables that are obtained from the first argument of
3658 ${prvscheck and used in the second argument before leaving the code,
3659 because their memory is reclaimed, so using them afterwards may do
3662 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3663 one (it's much easier than Tom thought :-).
3665 (5) Because of (4), we can now allow for the use of $prvscheck_result
3666 inside the third argument.
3668 PH/03 For some reason, the default setting of PATH when running a command from
3669 a pipe transport was just "/usr/bin". I have changed it to
3672 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3673 anything to be listed in the output from -bV.
3675 PH/05 When a filter generated an autoreply, the entire To: header line was
3676 quoted in the delivery log line, like this:
3678 => >A.N.Other <ano@some.domain> <original@ddress> ...
3680 This has been changed so that it extracts the operative address. There
3681 may be more than one such address. If so, they are comma-separated, like
3684 => >ano@some.domain,ona@other.domain <original@ddress> ...
3686 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3687 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3688 not being looked up in the rDNS to get a host name, Exim was showing the
3689 IP address twice in Received: lines, even though the IP addresses were
3690 identical. For example:
3692 Received: from [1.2.3.4] (helo=[1.2.3.4])
3694 However, if the real host name was known, it was omitting the HELO data
3695 if it matched the actual IP address. This has been tidied up so that it
3696 doesn't show the same IP address twice.
3698 PH/07 When both +timestamp and +memory debugging was on, the value given by
3699 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3700 called by the debug printing, thereby overwriting the timestamp buffer.
3701 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3703 PH/08 When the original message was included in an autoreply transport, it
3704 always said "this is a copy of the message, including all the headers",
3705 even if body_only or headers_only was set. It now gives an appropriate
3708 PH/09 Applied a patch from the Sieve maintainer which:
3710 o fixes some comments
3711 o adds the (disabled) notify extension core
3712 o adds some debug output for the result of if/elsif tests
3713 o points to the current vacation draft in the documentation
3714 and documents the missing references header update
3718 o fixes a bug in processing the envelope test (when testing
3719 multiple envelope elements, the last element determined the
3722 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3723 Electronic Mail") by including:
3725 Auto-submitted: auto-generated
3727 in the messages that it generates (bounce messages and others, such as
3728 warnings). In the case of bounce messages for non-SMTP messages, there was
3729 also a typo: it was using "Auto_submitted" (underscore instead of
3730 hyphen). Since every message generated by Exim is necessarily in response
3731 to another message, thes have all been changed to:
3733 Auto-Submitted: auto-replied
3735 in accordance with these statements in the RFC:
3737 The auto-replied keyword:
3739 - SHOULD be used on messages sent in direct response to another
3740 message by an automatic process,
3742 - MUST NOT be used on manually-generated messages,
3744 - MAY be used on Delivery Status Notifications (DSNs) and Message
3745 Disposition Notifications (MDNs),
3747 - MUST NOT be used on messages generated by automatic or periodic
3748 processes, except for messages which are automatic responses to
3751 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3752 to the default Received: header definition.
3754 PH/12 Added log selector acl_warn_skipped (default on).
3756 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3757 variables because (a) they are in the wrong storage pool and (b) even if
3758 they were copied, it wouldn't work properly because of the caching.
3760 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3761 checking when decoding. Apparently there are clients that generate
3762 overlong encoded strings. Why am I not surprised?
3764 PH/15 If the first argument of "${if match_address" was not empty, but did not
3765 contain an "@" character, Exim crashed. Now it writes a panic log message
3766 and treats the condition as false.
3768 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3770 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3771 extension "envelope-auth". The code is finished and in agreement with
3772 other implementations, but there is no documentation so far and in fact,
3773 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3774 not changing the active code.
3776 Print executed "if" and "elsif" statements when debugging is used. This
3777 helps a great deal to understand what a filter does.
3779 Document more things not specified clearly in RFC3028. I had all this
3780 sorted out, when out of a sudden new issues came to my mind. Oops."
3782 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3785 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3786 canonical form (as documented). However, after a host name lookup from
3787 the IP address, check_host() was doing a simple string comparison with
3788 addresses acquired from the DNS when checking that the found name did
3789 have the original IP as one of its addresses. Since any found IPv6
3790 addresses are likely to be in abbreviated form, the comparison could
3791 fail. Luckily, there already exists a function for doing the comparison
3792 by converting both addresses to binary, so now that is used instead of
3793 the text comparison.
3795 PH/20 There was another similar case to PH/19, when a complete host name was
3796 given in a host list; looking up its IP address could give an abbreviated
3797 form, whereas the current host's name might or might not be abbreviated.
3798 The same fix has been applied.
3804 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3805 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3808 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3809 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3811 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3813 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3814 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3815 Also, for "Auto-Submitted", treat anything other than "no" as
3816 non-personal, in accordance with RFC 3834. (Previously it treated
3817 anything starting "auto-" as non-personal.)
3819 TF/01 The control=submission/name=... option had a problem with syntax
3820 errors if the name included a slash character. The /name= option
3821 now slurps the rest of the string, so it can include any characters
3822 but it must come last in the list of options (after /sender_retain
3825 PH/05 Some modifications to the interface to the fake nameserver for the new
3833 TK/01 Added the "success_on_redirect" address verification option. See
3834 NewStuff for rationale and an example.
3836 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3838 PH/02 Patch to exigrep to allow it to work on syslog lines.
3840 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3841 fread() to skip over the body file's header line, because in Cygwin the
3842 header line is locked and is inaccessible.
3844 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3845 co-exist for some time) to make it clear that it is the Exim ID that is
3846 referenced, not the Message-ID: header line.
3848 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3849 string_format() function, because snprintf() does not exist on all
3852 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3853 ${stat: expansion item.
3855 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3856 protocol synchronization error", to keep the pedants happy.
3858 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3859 well as for IRIX systems, when gcc is being used. See the host.c source
3862 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3864 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3867 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3868 transport and to the smtp transport in LMTP mode.
3870 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3872 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3873 run a filter in a subprocess. This could lead to confusion in subsequent
3874 lookups in the parent process. There should also be a search_tidyup() at
3875 the end of the subprocess.
3877 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3878 only if the host matched helo_try_verify_hosts, which caused the
3879 verification to occur when the EHLO/HELO command was issued. The ACL just
3880 tested the remembered result. Now, if a previous verification attempt has
3881 not happened, "verify = helo" does it there and then.
3883 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3885 TK/03 Fix log output including CR from clamd.
3887 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3888 exist provoked a memory error which could cause a segfault.
3890 PH/15 Installed PCRE 6.2
3892 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3894 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3895 of the problem. Specifically, suggested +O2 rather than +O1 for the
3898 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3900 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3901 record, the port was not correctly logged when the outgoing_port log
3902 selector was set (it logged the transort's default port).
3904 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3905 fallback_hosts, and "hosts" in the smtp transport.
3907 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3908 host errors such as "Connection refused".
3910 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3911 authentication with radiusclient 0.4.9:
3913 - Error returned from rc_read_config was caught wrongly
3914 - Username/password not passed on to radius server due to wrong length.
3916 The presumption is that some radiusclient API changes for 4.51/PH/17
3917 were not taken care of correctly. The code is still untested by me (my
3918 Linux distribution still has 0.3.2 of radiusclient), but it was
3919 contributed by a Radius user.
3921 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3922 expanding the "port" option of the smtp transport.
3924 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3925 while reading a MIME header. Thanks to Tom Hughes for a patch.
3927 PH/24 Include config.h inside local_scan.h so that configuration settings are
3930 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3931 that in an ACL for RCPT (for example), you can examine exactly what was
3934 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3935 commands, but it was not correctly comparing the address with the actual
3936 client host address. Thus, it would show the EHLO address in Received:
3937 header lines when this was not necessary.
3939 PH/27 Added the % operator to ${eval:}.
3941 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3942 it should be ignoring failures (because with -C, for example, it has lost
3943 privilege). It wasn't ignoring creation failures other than "already
3946 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3949 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3950 because an input line was too long, either on its own, or by virtue of
3951 too many continuations, the temporary file was not being removed, and the
3952 return code was incorrect.
3954 PH/31 Missing "BOOL" in function definition in filtertest.c.
3956 PH/32 Applied Sieve patches from the maintainer.
3958 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3960 PH/33 Added "verify = not_blind".
3962 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3963 Local/Makefile (with some defaults set). These are used in built scripts
3964 such as exicyclog, but they have never been used in the exim_install
3965 script (though there are many overriding facilities there). I have
3966 arranged that the exim_install script now takes note of these two
3969 PH/35 Installed configuration files for Dragonfly.
3971 PH/36 When a locally submitted message by a trusted user did not contain a
3972 From: header, and the sender address was obtained from -f or from an SMTP
3973 MAIL command, and the trusted user did not use -F to supply a sender
3974 name, $originator_name was incorrectly used when constructing a From:
3975 header. Furthermore, $originator_name was used for submission mode
3976 messages from external hosts without From: headers in a similar way,
3977 which is clearly wrong.
3979 PH/37 Added control=suppress_local_fixups.
3981 PH/38 When log_selector = +received_sender was set, and the addition of the
3982 sender made the log line's construction buffer exactly full, or one byte
3983 less than full, an overflow happened when the terminating "\n" was
3986 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3987 when the result of a list match is failure because a DNS lookup failed.
3989 PH/40 RM_COMMAND is now used in the building process.
3991 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3992 the "build-* directories that it finds.
3994 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3995 address in a domain literal was a prefix of an interface address.
3997 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3998 when verifying a sender address, unless rewrite_headers is false.
4000 PH/44 Wrote a long comment about why errors_to addresses are verified as
4001 recipients, not senders.
4003 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4004 the ratelimit ACL was added.
4006 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4008 PH/46 Added extra information about PostgreSQL errors to the error string.
4010 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4011 avoiding the need to install special zones in a real server. This is
4012 backwards compatible; if it can't find the fake resolver, it drops back.
4013 Thus, both old and new test suites can be run.
4015 TF/02 Added util/ratelimit.pl
4017 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4018 clock is set back in time.
4020 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4021 Candler <B.Candler@pobox.com>.
4023 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4024 OK for addresses that are the result of redirections.
4026 PH/48 A number of further additions for the benefit of the new test suite,
4027 including a fake gethostbyname() that interfaces to the fake DNS resolver
4030 TF/06 The fix for widen_domains has also been applied to qualify_single and
4031 search_parents which are the other dnslookup options that can cause
4034 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4037 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4039 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4040 service" if it encountered an MX record with an empty target hostname.
4041 The message is now "an MX or SRV record indicated no SMTP service".
4043 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4044 if the DNS of the sending site is misconfigured. This is quite a
4045 common situation. This change restores the behaviour of treating a
4046 helo verification defer as a failure.
4048 PH/51 If self=fail was set on a router, the bounce message did not include the
4049 actual error message.
4055 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4057 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4058 command itself ended in error, the underlying message about the transport
4059 filter timeout was being overwritten with the pipe command error. Now the
4060 underlying error message should be appended to the second error message.
4062 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4064 PH/02 Reduce the amount of output that "make" produces by default. Full output
4065 can still be requested.
4067 PH/03 The warning log line about a condition test deferring for a "warn" verb
4068 was being output only once per connection, rather than after each
4069 occurrence (because it was using the same function as for successful
4070 "warn" verbs). This seems wrong, so I have changed it.
4072 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4073 it should not have, which might have caused a crash in the right
4074 circumstances, but probably never did.
4076 PH/04 Installed a modified version of Tony Finch's patch to make submission
4077 mode fix the return path as well as the Sender: header line, and to
4078 add a /name= option so that you can make the user's friendly name appear
4081 TF/03 Added the control = fakedefer ACL modifier.
4083 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4084 Mark Lowes for thorough testing.
4086 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4088 TK/03 Merged latest SRS patch from Miles Wilton.
4090 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4091 with the definition in sysexits.h (which is #included earlier).
4092 Fortunately, Exim does not actually use EX_OK. The code used to try to
4093 preserve the sysexits.h value, by assuming that macro definitions were
4094 scanned for macro replacements. I have been disabused of this notion,
4095 so now the code just undefines EX_OK before #including unistd.h.
4097 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4098 in the smtp transport. When a block could not be written in a single
4099 write() function, the timeout was being re-applied to each part-write.
4100 This seems wrong - if the receiver was accepting one byte at a time it
4101 would take for ever. The timeout is now adjusted when this happens. It
4102 doesn't have to be particularly precise.
4104 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4105 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4107 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4108 without a domain if the check to <postmaster@domain> fails.
4110 SC/01 Eximstats: added -xls and the ability to specify output files
4111 (patch written by Frank Heydlauf).
4113 SC/02 Eximstats: use FileHandles for outputting results.
4115 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4117 SC/04 Eximstats: fixed display of large numbers with -nvr option
4119 SC/05 Eximstats: fixed merging of reports with empty tables.
4121 SC/06 Eximstats: added the -include_original_destination flag
4123 SC/07 Eximstats: removed tabs and trailing whitespace.
4125 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4127 TK/06 MBOX spool code: Add real "From " MBOX separator line
4128 so the .eml file is really in mbox format (even though
4129 most programs do not really care). Patch from Alex Miller.
4131 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4132 The latter is generated from $received_to and is only set if the
4133 message has one envelope recipient. SA can use these headers,
4134 obviously out-of-the-box. Patch from Alex Miller.
4136 PH/08 The ${def test on a variable was returning false if the variable's
4137 value was "0", contrary to what the specification has always said!
4138 The result should be true unless the variable is empty.
4140 PH/09 The syntax error of a character other than { following "${if
4141 def:variable_name" (after optional whitespace) was not being diagnosed.
4142 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4143 accidental colon was present, for example, could give incorrect results.
4145 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4146 result is used (not including appendfile, where other changes are about
4149 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4150 This involved changing a lot of size variables from int to off_t. It
4151 should work with maildirs and everything.
4153 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4154 spamd dying while we are connected to it.
4156 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4159 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4160 function for BDB 4.3.
4162 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4164 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4165 the sources for PCRE have been re-arranged and more files are now
4168 PH/15 The code I had for printing potentially long long variables in PH/11
4169 above was not the best (it lost precision). The length of off_t variables
4170 is now inspected at build time, and an appropriate printing format (%ld
4171 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4172 to be "long long int" or "long int". This is needed for the internal
4173 formatting function string_vformat().
4175 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4176 the configuration file to be ":syslog", then the script "guesses" where
4177 the logs files are, rather than using the compiled in default. In our
4178 case the guess is not the same as the compiled default, so the script
4179 suddenly stopped working when I started to use syslog. The patch checks
4180 to see if log_file_path is "". If so, it attempts to read it from exim
4181 with no configuration file to get the compiled in version, before it
4182 falls back to the previous guessing code."
4184 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4185 implementing BATV in an Exim configuration. See NewStuff for the gory
4188 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4189 Makefile that are specific to HP-UX.
4191 PH/18 If the "use_postmaster" option was set for a recipient callout together
4192 with the "random" option, the postmaster address was used as the MAIL
4193 FROM address for the random test, but not for the subsequent recipient
4194 test. It is now used for both.
4196 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4197 patch removes a few documentation additions to RFC 3028, because the
4198 latest draft now contains them. It adds the new en;ascii-case comparator
4199 and a new error check for 8bit text in MIME parts. Comparator and
4200 require names are now matched exactly. I enabled the subaddress
4201 extension, but it is not well tested yet (read: it works for me)."
4203 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4204 rework some of the code of TK/09 above to avoid the hardwired use of
4205 "%lld" and "long long". Replaced the call to snprintf() with a call to
4208 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4209 records point to non-existent hosts", "retry timeout exceeded", and
4210 "retry time not reached for any host after a long failure period".
4212 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4213 experimental DomainKeys support:
4215 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4216 (2) On an error such as an illegally used "control", the wrong name for
4217 the control was given.
4219 These problems did NOT occur unless DomainKeys support was compiled.
4221 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4223 PH/24 Added ${if match_ip condition.
4225 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4226 databases so that it will be absolutely obvious if a crash occurs in the
4227 DB library. This is a regular occurrence (often caused by mis-matched
4230 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4231 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4232 picked up on a user's system that detects such things. There doesn't seem
4233 to be a gcc warning option for this - only an attribute that has to be
4234 put on the function's prototype. It seems that in Fedora Core 4 they have
4235 set this on a number of new functions. No doubt there will be more in due
4238 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4239 specify a transport. However, if an address that was verified by such a
4240 router was the subject of a callout, Exim crashed because it tried to
4241 read the rcpt_include_affixes from the non-existent transport. Now it
4242 just assumes that the setting of that option is false. This bug was
4243 introduced by 4.51/PH/31.
4245 PH/28 Changed -d+all to exclude +memory, because that information is very
4246 rarely of interest, but it makes the output a lot bigger. People tend to
4247 do -d+all out of habit.
4249 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4250 code in os-type was giving problems when libc.so lives in lib64, like on
4253 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4254 aren't the modern standard, and it seems that some systems' include files
4255 don't always have them. Exim was already checking for some of the newer
4256 ones like T_AAAA, and defining it itself. I've added checks for all the
4257 record types that Exim uses.
4259 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4260 not automatically generating a new one, as it is supposed to. This
4261 prevented TLS from working. If the file did exist, but contained invalid
4262 data, a new version was generated, as expected. It was only the case of a
4263 non-existent file that was broken.
4265 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4266 with a change in libdomainkeys > 0.64.
4268 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4269 from DNS. If the selector record carries the flag, it now has
4270 precedence over the domain-wide flag.
4272 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4274 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4275 the use of a port name that isn't defined in /etc/services) occurred, the
4276 message was deferred as in a normal delivery, and thus remained on the
4277 spool, instead of being failed because of the mua_wrapper setting. This
4278 is now fixed, and I tidied up some of the mua_wrapper messages at the
4281 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4282 the messages in a hash of arrays rather than using individual hashes.
4283 This is a bit cleaner and results in dramatic memory savings, albeit
4284 at a slight CPU cost.
4286 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4287 as requested by Marc Sherman.
4289 SC/10 Eximstats: added histograms for user specified patterns as requested
4292 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4294 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4295 fopen() in the content-scanning modules that did not already have it.
4301 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4302 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4304 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4306 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4308 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4309 to test Sieve filters that use "vacation".
4311 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4312 that changes the way the GnuTLS parameters are stored in the cache file.
4313 The new format can be generated externally. For backward compatibility,
4314 if the data in the cache doesn't make sense, Exim assumes it has read an
4315 old-format file, and it generates new data and writes a new file. This
4316 means that you can't go back to an older release without removing the
4319 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4320 work if there are any delivery delays because "one_time" forces the
4321 parent to be marked "delivered", so its unseen clone is never tried
4322 again. For this reason, Exim now forbids the simultaneous setting of
4325 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4326 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4327 entry if you want to know the details. The fix, however, neglected to
4328 consider the case when local delivery batching is involved. The test for
4329 "previously delivered" was not happening when checking to see if an
4330 address could be batched with a previous (undelivered) one; under
4331 certain circumstances this could lead to multiple deliveries to the same
4334 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4335 in its include files, and this causes problems building Exim.
4337 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4338 header_syntax) but Exim was just ignoring anything given after a slash.
4339 In particular, this caused confusion with an attempt to use "verify =
4340 reverse_host_lookup/defer_ok". An error is now given when options are
4341 supplied for verify items that do not have them. (Maybe reverse_host_
4342 lookup should have a defer_ok option, but that's a different point.)
4344 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4345 defined by RFC 821) to 2048, because there were problems with some AUTH
4346 commands, and RFC 1869 says the size should be increased for extended
4347 SMTP commands that take arguments.
4349 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4352 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4353 "unknown" error; now it says that the functionality isn't in the binary.
4355 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4356 an address' error message when a string expansion fails (syntax or
4357 whatever). Otherwise the password may appear in the log. Following change
4358 PH/42 below, there is no longer a chance of it appearing in a bounce
4361 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4363 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4364 of its addresses was ever tried. (Bugzilla bug #2.)
4366 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4367 the result incorrectly in the debug output. (It correctly added a newline
4368 to what was transported.)
4370 TF/01 Added $received_time.
4372 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4373 commented out examples of how to interface to a virus scanner and to
4374 SpamAssassin. Also added commented examples of av_scanner and
4375 spamd_address settings.
4377 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4378 and controls are allowed in which ACLs. There were a couple of minor
4379 errors. Some of the entries in the conditions table (which is a table of
4380 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4381 negation of where the condition IS allowed.
4383 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4385 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4386 header file does not have a version number, so I've had to invent a new
4387 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4388 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4389 radiusclient), but it was contributed by a Radius user.
4391 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4392 files or directories, for OpenSSL.
4394 PH/19 When an Exim process that is running as root has to create an Exim log
4395 file, it does so in a subprocess that runs as exim:exim so as to get the
4396 ownership right at creation (otherwise, other Exim processes might see
4397 the file with the wrong ownership). There was no test for failure of this
4398 fork() call, which would lead to the process getting stuck as it waited
4399 for a non-existent subprocess. Forks do occasionally fail when resources
4400 run out. I reviewed all the other calls to fork(); they all seem to check
4403 PH/20 When checking for unexpected SMTP input at connect time (before writing
4404 the banner), Exim was not dealing correctly with a non-positive return
4405 from the read() function. If the client had disconnected by this time,
4406 the result was a log entry for a synchronization error with an empty
4407 string after "input=" when read() returned zero. If read() returned -1
4408 (an event I could not check), uninitialized data bytes were printed.
4409 There were reports of junk text (parts of files, etc) appearing after
4412 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4414 PH/22 Added support for macro redefinition, and (re)definition in between
4415 driver and ACL definitions.
4417 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4418 forgetting to use the resulting value; it was using the unexpanded value.
4420 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4421 hadn't been configured. The fix is from Juergen Kreileder, who
4422 understands it better than I do:
4424 "Here's what I see happening with three configured cyrus_sasl
4425 authenticators configured (plain, login, cram-md5):
4427 On startup auth_cyrus_sasl_init() gets called for each of these.
4428 This means three calls to sasl_listmech() without a specified mech_list.
4429 => SASL tests which mechs of all available mechs actually work
4430 => three warnings about OTP not working
4431 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4433 With the patch, sasl_listmech() also gets called three times. But now
4434 SASL's mech_list option is set to the server_mech specified in the the
4435 authenticator. Or in other words, the answer from sasl_listmech()
4436 gets limited to just the mech you're testing for (which is different
4438 => the return list contains just 'plain' or 'login', 'cram-md5' or
4439 nothing depending on the value of ob->server_mech.
4441 I've just tested the patch: Authentication still works fine,
4442 unavailable mechs specified in the exim configuration are still
4443 caught, and the auth.log warnings about OTP are gone."
4445 PH/25 When debugging is enabled, the contents of the command line are added
4446 to the debugging output, even when log_selector=+arguments is not
4449 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4450 answer is "GNU", and only if the return is "GNU/something" is the answer
4453 PH/27 $acl_verify_message is now set immediately after the failure of a
4454 verification in an ACL, and so is available in subsequent modifiers. In
4455 particular, the message can be preserved by coding like this:
4457 warn !verify = sender
4458 set acl_m0 = $acl_verify_message
4460 Previously, $acl_verify_message was set only while expanding "message"
4461 and "log_message" when a very denied access.
4463 PH/28 Modified OS/os.c-Linux with
4465 -#ifndef OS_LOAD_AVERAGE
4466 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4468 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4469 nomenclature these days.)
4471 PH/29 Installed patch from the Sieve maintainer that adds the options
4472 sieve_useraddress and sieve_subaddress to the redirect router.
4474 PH/30 In these circumstances:
4475 . Two addresses routed to the same list of hosts;
4476 . First host does not offer TLS;
4477 . First host accepts first address;
4478 . First host gives temporary error to second address;
4479 . Second host offers TLS and a TLS session is established;
4480 . Second host accepts second address.
4481 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4482 and peerdn, if requested) that were in fact used only for the second
4485 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4486 attention to any local part prefix or suffix that was matched by the
4487 router that accepted the address. It now behaves in the same way as it
4488 does for delivery: the affixes are removed from the local part unless
4489 rcpt_include_affixes is set on the transport.
4491 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4492 timeout during the DATA phase of an incoming message.
4494 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4495 applied a patch sanctioned by the Sieve maintainer.
4497 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4498 the uid or gid is negative. A case of a negative gid caused this to be
4499 noticed. The fix allows for either to be negative.
4501 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4502 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4505 PH/36 The change PH/12 above was broken. Fixed it.
4507 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4508 the grounds that routing the same address twice would always produce the
4509 same answer. This might have been true once, but it is certainly no
4510 longer true now. Routing a child address may depend on the previous
4511 routing that produced that child. Some complicated redirection strategies
4512 went wrong when messages had multiple recipients, and made Exim's
4513 behaviour dependent on the order in which the addresses were given.
4515 I have moved the duplicate checking until after the routing is complete.
4516 Exim scans the addresses that are assigned to local and remote
4517 transports, and removes any duplicates. This means that more work will be
4518 done, as duplicates will always all be routed, but duplicates are
4519 presumably rare, so I don't expect this is of any significance.
4521 For deliveries to pipes, files, and autoreplies, the duplicate checking
4522 still happens during the routing process, since they are not going to be
4525 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4526 It corrects a timeout issue with spamd. This is Ian's comment: "The
4527 background is that sometimes spamd either never reads data from a
4528 connection it has accepted, or it never writes response data. The exiscan
4529 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4530 blindly assumes that writes won't block so it may never time out."
4532 PH/39 Allow G after quota size as well as K and M.
4534 PH/40 The value set for $authenticated_id in an authenticator may not contain
4535 binary zeroes or newlines because the value is written to log lines and
4536 to spool files. There was no check on this. Now the value is run through
4537 the string_printing() function so that such characters are converted to
4538 printable escape sequences.
4540 PH/41 $message_linecount is a new variable that contains the total number of
4541 lines in the message. Compare $body_linecount, which is the count for the
4544 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4545 bounce and delay warning messages, except in certain special cases, which
4548 (a) An SMTP error message from a remote host;
4549 (b) A message specified in a :fail: redirection;
4550 (c) A message specified in a "fail" command in a system filter;
4551 (d) A message specified in a FAIL return from the queryprogram router;
4552 (e) A message specified by the cannot_route_message router option.
4554 In these cases only, Exim does include the error details in bounce and
4555 warning messages. There are also a few cases where bland messages such
4556 as "unrouteable address" or "local delivery error" are given.
4558 PH/43 $value is now also set for the "else" part of a ${run expansion.
4560 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4561 being worked on, but at least Exim now implements the latest version to
4564 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4565 process to complete was treated as a delivery failure, a timeout while
4566 writing the message to the pipe was logged, but erroneously treated as a
4567 successful delivery. Such timeouts include transport filter timeouts. For
4568 consistency with the overall process timeout, these timeouts are now
4569 treated as errors, giving rise to delivery failures by default. However,
4570 there is now a new Boolean option for the pipe transport called
4571 timeout_defer, which, if set TRUE, converts the failures into defers for
4572 both kinds of timeout. A transport filter timeout is now identified in
4575 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4576 systems where "make" and "gmake" are different, calling "gmake" at top
4577 level broke things. I've arranged for the value of $(MAKE) to be passed
4578 from the Makefile to this script so that it can call the same version of
4582 A note about Exim versions 4.44 and 4.50
4583 ----------------------------------------
4585 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4586 changes of various kinds. As a consequence, a big documentation update was
4587 needed. This delayed the release for rather longer than seemed good, especially
4588 in the light of a couple of (minor) security issues. Therefore, the changes
4589 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4590 release. So 4.44 and 4.50 are in effect two different branches that both start
4593 I have left the 4.50 change log unchanged; it contains all the changes since
4594 4.43. The change log for 4.44 is below; many of its items are identical to
4595 those for 4.50. This seems to be the most sensible way to preserve the
4596 historical information.
4602 1. Minor wording change to the doc/README.SIEVE file.
4604 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4605 computation of the current number of files was incorrect.
4607 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4608 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4611 4. Give more explanation in the error message when the command for a transport
4612 filter fails to execute.
4614 5. There are several places where Exim runs a non-Exim command in a
4615 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4616 was being done only for the command run by the queryprogram router. It is
4617 now done for all such subprocesses. The other cases are: ${run, transport
4618 filters, and the commands run by the lmtp and pipe transports.
4620 6. Added CONFIGURE_GROUP build-time option.
4622 7. Some older OS have a limit of 256 on the maximum number of file
4623 descriptors. Exim was using setrlimit() to set 1000 as a large value
4624 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4625 systems. I've change it so that if it can't get 1000, it tries for 256.
4627 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4628 was an oversight, and furthermore, ever since the addition of extra
4629 controls (e.g. 4.43/32), the checks on when to allow different forms of
4630 "control" were broken. There should now be diagnostics for all cases when a
4631 control that does not make sense is encountered.
4633 9. Added the /retain_sender option to "control=submission".
4635 10. $recipients is now available in the predata ACL (oversight).
4637 11. Tidy the search cache before the fork to do a delivery from a message
4638 received from the command line. Otherwise the child will trigger a lookup
4639 failure and thereby defer the delivery if it tries to use (for example) a
4640 cached ldap connection that the parent has called unbind on.
4642 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4643 of $address_data from the recipient verification was clobbered by the
4644 sender verification.
4646 13. The value of address_data from a sender verification is now available in
4647 $sender_address_data in subsequent conditions in the ACL statement.
4649 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4651 15. Added a new option "connect=<time>" to callout options, to set a different
4654 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4655 was its contents. (It was OK if the option was not defined at all.)
4657 17. A "Completed" log line is now written for messages that are removed from
4658 the spool by the -Mrm option.
4660 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4661 information about exactly what failed.
4663 19. Added -dd to debug only the daemon process.
4665 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4666 handles timeouts, both on the server side and network timeouts. Renamed the
4667 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4669 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4670 It is now set to "smtps".
4672 22. $host_address is now set to the target address during the checking of
4673 ignore_target_hosts.
4675 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4676 being passed; this would have caused $sender_host_name to have been used if
4677 matching the list had actually called for a host name (not very likely,
4678 since this list is usually IP addresses). A host name is now passed as
4681 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4682 code that specifies a non-restarting handler (typically sigaction() in
4683 modern systems) in an attempt to fix a rare and obscure crash bug.
4685 25. Narrowed the window for a race in the daemon that could cause it to ignore
4686 SIGCHLD signals. This is not a major problem, because they are used only to
4687 wake it up if nothing else does.
4689 26. A malformed maildirsize file could cause Exim to calculate negative values
4690 for the mailbox size or file count. Odd effects could occur as a result.
4691 The maildirsize information is now recalculated if the size or filecount
4694 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4695 support for a long time. Removed HAVE_SYS_VFS_H.
4697 28. Installed the latest version of exipick from John Jetmore.
4699 29. In an address list, if the pattern was not a regular expression, an empty
4700 subject address (from a bounce message) matched only if the pattern was an
4701 empty string. Non-empty patterns were not even tested. This was the wrong
4702 because it is perfectly reasonable to use an empty address as part of a
4703 database query. An empty address is now tested by patterns that are
4704 lookups. However, all the other forms of pattern expect the subject to
4705 contain a local part and a domain, and therefore, for them, an empty
4706 address still always fails if the pattern is not itself empty.
4708 30. Exim went into a mad DNS loop when attempting to do a callout where the
4709 host was specified on an smtp transport, and looking it up yielded more
4710 than one IP address.
4712 31. Re-factored the code for checking spool and log partition space into a
4713 function that finds that data and another that does the check. The former
4714 is then used to implement four new variables: $spool_space, $log_space,
4715 $spool_inodes, and $log_inodes.
4717 32. The RFC2047 encoding function was originally intended for short strings
4718 such as real names; it was not keeping to the 75-character limit for
4719 encoded words that the RFC imposes. It now respects the limit, and
4720 generates multiple encoded words if necessary. To be on the safe side, I
4721 have increased the buffer size for the ${rfc2047: expansion operator from
4724 33. It is now permitted to omit both strings after an "if" condition; if the
4725 condition is true, the result is "true". As before, when the second string
4726 is omitted, a false condition yields an empty string. This makes it less
4727 cumbersome to write custom ACL and router conditions.
4729 34. Failure to deliver a bounce message always caused it to be frozen, even if
4730 there was an errors_to setting on the router. The errors_to setting is now
4733 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4734 canonical form (fully expanded) before being placed in
4735 $sender_host_address.
4737 36. The table in the code that translates DNS record types into text (T_A to
4738 "A" for instance) was missing entries for NS and CNAME. It is just possible
4739 that this could have caused confusion if both these types were looked up
4740 for the same domain, because the text type is used as part of Exim's
4741 per-process caching. But the chance of anyone hitting this buglet seems
4744 37. The dnsdb lookup has been extended in a number of ways.
4746 (1) There is a new type, "zns", which walks up the domain tree until it
4747 finds some nameserver records. It should be used with care.
4749 (2) There is a new type, "mxh", which is like "mx" except that it returns
4750 just the host names, not the priorities.
4752 (3) It is now possible to give a list of domains (or IP addresses) to be
4753 looked up. The behaviour when one of the lookups defers can be
4754 controlled by a keyword.
4756 (4) It is now possible to specify the separator character for use when
4757 multiple records are returned.
4759 38. The dnslists ACL condition has been extended: it is now possible to supply
4760 a list of IP addresses and/or domains to be looked up in a particular DNS
4763 39. Added log_selector=+queue_time_overall.
4765 40. When running the queue in the test harness, wait just a tad after forking a
4766 delivery process, to get repeatability of debugging output.
4768 41. Include certificate and key file names in error message when GnuTLS fails
4769 to set them up, because the GnuTLS error message doesn't include the name
4770 of the failing file when there is a problem reading it.
4772 42. Allow both -bf and -bF in the same test run.
4774 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4776 44. The "Exiscan patch" is now merged into the mainline Exim source.
4778 45. Sometimes the final signoff response after QUIT could fail to get
4779 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4780 < 0 before doing a fflush(). This bug looks as though it goes back to the
4781 introduction of TLS in release 3.20, but "sometimes" must have been rare
4782 because the tests only now provoked it.
4784 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4785 (this can affect the format of dates).
4787 47. exim_tidydb, when checking for the continued existence of a message for
4788 which it has found a message-specific retry record, was not finding
4789 messages that were in split spool directories. Consequently, it was
4790 deleting retry records that should have stayed in existence.
4792 48. Steve fixed some bugs in eximstats.
4794 49. The SPA authentication driver was not abandoning authentication and moving
4795 on to the next authenticator when an expansion was forced to fail,
4796 contradicting the general specification for all authenticators. Instead it
4797 was generating a temporary error. It now behaves as specified.
4799 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4800 (the order specifies the preference for clients). The order is now AES256,
4801 AES128, 3DES, ARCFOUR128.
4803 51. Small patch to Sieve code - explicitly set From: when generating an
4806 52. Exim crashed if a remote delivery caused a very long error message to be
4807 recorded - for instance if somebody sent an entire SpamAssassin report back
4808 as a large number of 550 error lines. This bug was coincidentally fixed by
4809 increasing the size of one of Exim's internal buffers (big_buffer) that
4810 happened as part of the Exiscan merge. However, to be on the safe side, I
4811 have made the code more robust (and fixed the comments that describe what
4814 53. Now that there can be additional text after "Completed" in log lines (if
4815 the queue_time_overall log selector is set), a one-byte patch to exigrep
4816 was needed to allow it to recognize "Completed" as not the last thing in
4819 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4820 patch that reportedly fixes this has been added. I am not expert enough to
4821 create a test for it. This is what the patch creator wrote:
4823 "I found a little strange behaviour of ldap code when working with
4824 Windows 2003 AD Domain, where users was placed in more than one
4825 Organization Units. When I tried to give exim partial DN, the exit code
4826 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4827 But simultaneously result of request was absolutely normal ldap result,
4828 so I produce this patch..."
4830 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4831 REFERENCE, so I have modified the code to exclude the patch when that macro
4834 55. Some experimental protocols are using DNS PTR records for new purposes. The
4835 keys for these records are domain names, not reversed IP addresses. The
4836 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4837 leaves it alone. Component reversal etc. now happens only for IP addresses.
4840 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4842 57. Double the size of the debug message buffer (to 2048) so that more of very
4843 long debug lines gets shown.
4845 58. The exicyclog utility now does better if the number of log files to keep
4846 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4848 59. Two changes related to the smtp_active_hostname option:
4850 (1) $smtp_active_hostname is now available as a variable.
4851 (2) The default for smtp_banner uses $smtp_active_hostname instead
4852 of $primary_hostname.
4854 60. The host_aton() function is supposed to be passed a string that is known
4855 to be a valid IP address. However, in the case of IPv6 addresses, it was
4856 not checking this. This is a hostage to fortune. Exim now panics and dies
4857 if the condition is not met. A case was found where this could be provoked
4858 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4859 components; fortuitously, this particular loophole had already been fixed
4860 by change 4.50/55 above.
4862 If there are any other similar loopholes, the new check in host_aton()
4863 itself should stop them being exploited. The report I received stated that
4864 data on the command line could provoke the exploit when Exim was running as
4865 exim, but did not say which command line option was involved. All I could
4866 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4867 running as the user.
4870 61. There was a buffer overflow vulnerability in the SPA authentication code
4871 (which came originally from the Samba project). I have added a test to the
4872 spa_base64_to_bits() function which I hope fixes it.
4875 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4876 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4878 63. The daemon start-up calls getloadavg() while still root for those OS that
4879 need the first call to be done as root, but it missed one case: when
4880 deliver_queue_load_max is set with deliver_drop_privilege. This is
4881 necessary for the benefit of the queue runner, because there is no re-exec
4882 when deliver_drop_privilege is set.
4884 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4885 This has been fixed.
4887 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4888 was in use, was not putting the data itself into the right store pool;
4889 consequently, it could be overwritten for a subsequent message in the same
4890 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4893 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4895 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4896 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4897 the function were treating the return as a boolean value, which happened to
4898 work because 0=false and not-0=true, but is not correct code.
4900 68. The host_aton() function was not handling scoped IPv6 addresses (those
4901 with, for example, "%eth0" on the end) correctly.
4903 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4904 negated items (that is, ~something) in unsigned ints. Some compilers
4905 apparently mutter when there is no cast.
4907 70. If an address verification called from an ACL failed, and did not produce a
4908 user-specific message (i.e. there was only a "system" message), nothing was
4909 put in $acl_verify_message. In this situation, it now puts the system
4912 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4913 session; change 4.31/43 added the unwanted input to the log line - except
4914 that it did not do this in the start of session case. It now does.
4916 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4917 This is wrong and can cause the other end to generate a synchronization
4918 error if it is another Exim or anything else that does the synchronization
4919 check. A QUIT command is no longer sent after a timeout.
4921 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4922 during host lookups.
4924 74. The defer_ok option of callout verification was not working if it was used
4925 when verifying addresses in header lines, that is, for this case:
4927 verify = header_sender/callout=defer_ok
4929 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4930 those file descriptors could be used for SMTP connections. If anything
4931 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4932 could be sent to the SMTP client, causing chaos. The daemon now opens
4933 stdin, stdout, and stderr to /dev/null when it puts itself into the
4936 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4937 log by default. The user can override this with suitable Perl magic.
4939 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4940 the log message when discard triggers, was not working for the DATA ACL or
4941 for the non-SMTP ACL.
4943 78. Error message wording change in sieve.c.
4945 79. If smtp_accept_max_per_host was set, the number of connections could be
4946 restricted to fewer than expected, because the daemon was trying to set up
4947 a new connection before checking whether the processes handling previous
4948 connections had finished. The check for completed processes is now done
4949 earlier. On busy systems, this bug wouldn't be noticed because something
4950 else would have woken the daemon, and it would have reaped the completed
4953 80. If a message was submitted locally by a user whose login name contained one
4954 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4955 It caused a spool format error. I have fixed the spool reading code. A
4956 related problem was that the "from" clause in the Received: line became
4957 illegal because of the space(s). It is now covered by ${quote_local_part.
4959 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4962 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4964 83. Patch from Sieve maintainer to fix unterminated string problem in
4965 "vacation" handling.
4967 84. Some minor changes to the Linux configuration files to help with other
4968 OS variants using glibc.
4970 85. One more patch for Sieve to update vacation handling to latest spec.
4973 ----------------------------------------------------
4974 See the note above about the 4.44 and 4.50 releases.
4975 ----------------------------------------------------
4981 1. Change 4.43/35 introduced a bug that caused file counts to be
4982 incorrectly computed when quota_filecount was set in an appendfile
4985 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4986 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4989 3. Give more explanation in the error message when the command for a transport
4990 filter fails to execute.
4992 4. There are several places where Exim runs a non-Exim command in a
4993 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4994 was being done only for the command run by the queryprogram router. It is
4995 now done for all such subprocesses. The other cases are: ${run, transport
4996 filters, and the commands run by the lmtp and pipe transports.
4998 5. Some older OS have a limit of 256 on the maximum number of file
4999 descriptors. Exim was using setrlimit() to set 1000 as a large value
5000 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5001 systems. I've change it so that if it can't get 1000, it tries for 256.
5003 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5004 was an oversight, and furthermore, ever since the addition of extra
5005 controls (e.g. 4.43/32), the checks on when to allow different forms of
5006 "control" were broken. There should now be diagnostics for all cases when a
5007 control that does not make sense is encountered.
5009 7. $recipients is now available in the predata ACL (oversight).
5011 8. Tidy the search cache before the fork to do a delivery from a message
5012 received from the command line. Otherwise the child will trigger a lookup
5013 failure and thereby defer the delivery if it tries to use (for example) a
5014 cached ldap connection that the parent has called unbind on.
5016 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5017 of $address_data from the recipient verification was clobbered by the
5018 sender verification.
5020 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5021 was its contents. (It was OK if the option was not defined at all.)
5023 11. A "Completed" log line is now written for messages that are removed from
5024 the spool by the -Mrm option.
5026 12. $host_address is now set to the target address during the checking of
5027 ignore_target_hosts.
5029 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5030 being passed; this would have caused $sender_host_name to have been used if
5031 matching the list had actually called for a host name (not very likely,
5032 since this list is usually IP addresses). A host name is now passed as
5035 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5036 code that specifies a non-restarting handler (typically sigaction() in
5037 modern systems) in an attempt to fix a rare and obscure crash bug.
5039 15. Narrowed the window for a race in the daemon that could cause it to ignore
5040 SIGCHLD signals. This is not a major problem, because they are used only to
5041 wake it up if nothing else does.
5043 16. A malformed maildirsize file could cause Exim to calculate negative values
5044 for the mailbox size or file count. Odd effects could occur as a result.
5045 The maildirsize information is now recalculated if the size or filecount
5048 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5049 support for a long time. Removed HAVE_SYS_VFS_H.
5051 18. Updated exipick to current release from John Jetmore.
5053 19. Allow an empty sender to be matched against a lookup in an address list.
5054 Previously the only cases considered were a regular expression, or an
5057 20. Exim went into a mad DNS lookup loop when doing a callout where the
5058 host was specified on the transport, if the DNS lookup yielded more than
5061 21. The RFC2047 encoding function was originally intended for short strings
5062 such as real names; it was not keeping to the 75-character limit for
5063 encoded words that the RFC imposes. It now respects the limit, and
5064 generates multiple encoded words if necessary. To be on the safe side, I
5065 have increased the buffer size for the ${rfc2047: expansion operator from
5068 22. Failure to deliver a bounce message always caused it to be frozen, even if
5069 there was an errors_to setting on the router. The errors_to setting is now
5072 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5073 canonical form (fully expanded) before being placed in
5074 $sender_host_address.
5076 24. Updated eximstats to version 1.33
5078 25. Include certificate and key file names in error message when GnuTLS fails
5079 to set them up, because the GnuTLS error message doesn't include the name
5080 of the failing file when there is a problem reading it.
5082 26. Expand error message when OpenSSL has problems setting up cert/key files.
5085 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5086 (this can affect the format of dates).
5088 28. exim_tidydb, when checking for the continued existence of a message for
5089 which it has found a message-specific retry record, was not finding
5090 messages that were in split spool directories. Consequently, it was
5091 deleting retry records that should have stayed in existence.
5093 29. eximstats updated to version 1.35
5094 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5095 1.35 - bugfix such that pie charts by volume are generated correctly
5097 30. The SPA authentication driver was not abandoning authentication and moving
5098 on to the next authenticator when an expansion was forced to fail,
5099 contradicting the general specification for all authenticators. Instead it
5100 was generating a temporary error. It now behaves as specified.
5102 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5103 (the order specifies the preference for clients). The order is now AES256,
5104 AES128, 3DES, ARCFOUR128.
5106 31. Small patch to Sieve code - explicitly set From: when generating an
5109 32. Exim crashed if a remote delivery caused a very long error message to be
5110 recorded - for instance if somebody sent an entire SpamAssassin report back
5111 as a large number of 550 error lines. This bug was coincidentally fixed by
5112 increasing the size of one of Exim's internal buffers (big_buffer) that
5113 happened as part of the Exiscan merge. However, to be on the safe side, I
5114 have made the code more robust (and fixed the comments that describe what
5117 33. Some experimental protocols are using DNS PTR records for new purposes. The
5118 keys for these records are domain names, not reversed IP addresses. The
5119 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5120 leaves it alone. Component reversal etc. now happens only for IP addresses.
5123 34. The host_aton() function is supposed to be passed a string that is known
5124 to be a valid IP address. However, in the case of IPv6 addresses, it was
5125 not checking this. This is a hostage to fortune. Exim now panics and dies
5126 if the condition is not met. A case was found where this could be provoked
5127 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5128 components; fortuitously, this particular loophole had already been fixed
5129 by change 4.50/55 or 4.44/33 above.
5131 If there are any other similar loopholes, the new check in host_aton()
5132 itself should stop them being exploited. The report I received stated that
5133 data on the command line could provoke the exploit when Exim was running as
5134 exim, but did not say which command line option was involved. All I could
5135 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5136 running as the user.
5139 35. There was a buffer overflow vulnerability in the SPA authentication code
5140 (which came originally from the Samba project). I have added a test to the
5141 spa_base64_to_bits() function which I hope fixes it.
5144 36. The daemon start-up calls getloadavg() while still root for those OS that
5145 need the first call to be done as root, but it missed one case: when
5146 deliver_queue_load_max is set with deliver_drop_privilege. This is
5147 necessary for the benefit of the queue runner, because there is no re-exec
5148 when deliver_drop_privilege is set.
5150 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5151 was in use, was not putting the data itself into the right store pool;
5152 consequently, it could be overwritten for a subsequent message in the same
5153 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5156 38. Sometimes the final signoff response after QUIT could fail to get
5157 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5158 < 0 before doing a fflush(). This bug looks as though it goes back to the
5159 introduction of TLS in release 3.20, but "sometimes" must have been rare
5160 because the tests only now provoked it.
5166 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5167 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5168 Now it returns an integer. A number of calls were still expecting a T/F
5169 return. Fortuitously, in all cases, the tests worked in OK situations,
5170 which is the norm. However, things would have gone wrong on any write
5171 failures on the smtp file descriptor. This function is used when sending
5172 messages over SMTP and also when doing verify callouts.
5174 2. When Exim is called to do synchronous delivery of a locally submitted
5175 message (the -odf or -odi options), it no longer closes stderr before doing
5178 3. Implemented the mua_wrapper option.
5180 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5182 5. Implemented the functions header_remove(), header_testname(),
5183 header_add_at_position(), and receive_remove_recipient(), and exported them
5186 6. If an ACL "warn" statement specified the addition of headers, Exim already
5187 inserted X-ACL-Warn: at the start if there was no header name. However, it
5188 was not making this test for the second and subsequent header lines if
5189 there were newlines in the string. This meant that an invalid header could
5190 be inserted if Exim was badly configured.
5192 7. Allow an ACL "warn" statement to add header lines at the start or after all
5193 the Received: headers, as well as at the end.
5195 8. Added the rcpt_4xx retry error code.
5197 9. Added postmaster_mailfrom=xxx to callout verification option.
5199 10. Added mailfrom=xxxx to the callout verification option, for verify=
5202 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5203 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5205 12. Inserted some casts to stop certain compilers warning when using pointer
5206 differences as field lengths or precisions in printf-type calls (mostly
5207 affecting debugging statements).
5209 13. Added optional readline() support for -be (dynamically loaded).
5211 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5212 same clock tick as a message's arrival, so that its received time was the
5213 same as the "first fail" time on the retry record, and that message
5214 remained on the queue past the ultimate address timeout, every queue runner
5215 would try a delivery (because it was past the ultimate address timeout) but
5216 after another failure, the ultimate address timeout, which should have then
5217 bounced the address, did not kick in. This was a "< instead of <=" error;
5218 in most cases the first failure would have been in the next clock tick
5219 after the received time, and all would be well.
5221 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5222 being recognized when the domain list was tested by the match_domain
5223 condition in an expansion string.
5225 16. Added the ${str2b64: operator.
5227 17. Exim was always calling setrlimit() to set a large limit for the number of
5228 processes, without checking whether the existing limit was already
5229 adequate. (It did check for the limit on file descriptors.) Furthermore,
5230 errors from getrlimit() and setrlimit() were being ignored. Now they are
5231 logged to the main and panic logs, but Exim does carry on, to try to do its
5232 job under whatever limits there are.
5234 18. Imported PCRE 5.0.
5236 19. Trivial typo in log message " temporarily refused connection" (the leading
5239 20. If the log selector return_path_on_delivery was set and an address was
5240 redirected to /dev/null, the delivery process crashed because it assumed
5241 that a return path would always be set for a "successful" delivery. In this
5242 case, the whole delivery is bypassed as an optimization, and therefore no
5245 21. Internal re-arrangement: the function for sending a challenge and reading
5246 a response while authentication was assuming a zero-terminated challenge
5247 string. It's now changed to take a pointer and a length, to allow for
5248 binary data in such strings.
5250 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5252 23. Exim was not respecting finduser_retries when seeking the login of the
5253 uid under which it was called; it was always trying 10 times. (The default
5254 setting of finduser_retries is zero.) Also, it was sleeping after the final
5255 failure, which is pointless.
5257 24. Implemented tls_on_connect_ports.
5259 25. Implemented acl_smtp_predata.
5261 26. If the domain in control=submission is set empty, Exim assumes that the
5262 authenticated id is a complete email address when it generates From: or
5263 Sender: header lines.
5265 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5266 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5267 chown and chgrp in /bin and hostname in /usr/bin.
5269 28. Exim was keeping the "process log" file open after each use, just as it
5270 does for the main log. This opens the possibility of it remaining open for
5271 long periods when the USR1 signal hits a daemon. Occasional processlog
5272 errors were reported, that could have been caused by this. Anyway, it seems
5273 much more sensible not to leave this file open at all, so that is what now
5276 29. The long-running daemon process does not normally write to the log once it
5277 has entered its main loop, and it closes the log before doing so. This is
5278 so that log files can straightforwardly be renamed and moved. However,
5279 there are a couple of unusual error situations where the daemon does write
5280 log entries, and I had neglected to close the log afterwards.
5282 30. The text of an SMTP error response that was received during a remote
5283 delivery was being truncated at 512 bytes. This is too short for some of
5284 the long messages that one sometimes sees. I've increased the limit to
5287 31. It is now possible to make retry rules that apply only when a message has a
5288 specific sender, in particular, an empty sender.
5290 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5291 it possible to be selective about when SMTP synchronization is enforced.
5293 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5295 32. Implemented hosts_connection_nolog.
5297 33. Added an ACL for QUIT.
5299 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5302 35. Added mailbox_size and mailbox_filecount to appendfile.
5304 36. Added control = no_multiline_responses to ACLs.
5306 37. There was a bug in the logic of the code that waits for the clock to tick
5307 in the case where the clock went backwards by a substantial amount such
5308 that the microsecond fraction of "now" was more than the microsecond
5309 fraction of "then" (but the whole seconds number was less).
5311 38. Added support for the libradius Radius client library this is found on
5312 FreeBSD (previously only the radiusclient library was supported).
5318 1. When certain lookups returned multiple values in the form name=value, the
5319 quoting of the values was not always being done properly. Specifically:
5320 (a) If the value started with a double quote, but contained no whitespace,
5322 (b) If the value contained whitespace other than a space character (i.e.
5323 tabs or newlines or carriage returns) it was not quoted.
5324 This fix has been applied to the mysql and pgsql lookups by writing a
5325 separate quoting function and calling it from the lookup code. The fix
5326 should probably also be applied to nisplus, ibase and oracle lookups, but
5327 since I cannot test any of those, I have not disturbed their existing code.
5329 2. A hit in the callout cache for a specific address caused a log line with no
5330 reason for rejecting RCPT. Now it says "Previous (cached) callout
5331 verification failure".
5333 3. There was an off-by-one bug in the queryprogram router. An over-long
5334 return line was truncated at 256 instead of 255 characters, thereby
5335 overflowing its buffer with the terminating zero. As well as fixing this, I
5336 have increased the buffer size to 1024 (and made a note to document this).
5338 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5339 when Exim is waiting for an SMTP response from a remote server, Exim
5340 restarts its select() call on the socket, thereby resetting its timeout.
5341 This is not a problem when such interrupts are rare. Somebody set up a cron
5342 job to run exiwhat every 2 minutes, which is less than the normal select()
5343 timeout (5 or 10 minutes). This meant that the select() timeout never
5344 kicked in because it was always reset. I have fixed this by comparing the
5345 time when an interrupt arrives with the time at the start of the first call
5346 to select(). If more time than the timeout has elapsed, the interrupt is
5347 treated as a timeout.
5349 5. Some internal re-factoring in preparation for the addition of Sieve
5350 extensions (by MH). In particular, the "personal" test is moved to a
5351 separate function, and given an option for scanning Cc: and Bcc: (which is
5352 not set for Exim filters).
5354 6. When Exim created an email address using the login of the caller as the
5355 local part (e.g. when creating a From: or Sender: header line), it was not
5356 quoting the local part when it contained special characters such as @.
5358 7. Installed new OpenBSD configuration files.
5360 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5361 try to make them clearer.
5363 9. Callout options, other than the timeout value, were being ignored when
5364 verifying sender addresses in header lines. For example, when using
5366 verify = header_sender/callout=no_cache
5368 the cache was (incorrectly) being used.
5370 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5371 only the Cygwin environment.
5373 11. When return_path_on_delivery was set as a log selector, if different remote
5374 addresses in the same message used different return paths and parallel
5375 remote delivery occurred, the wrong values would sometimes be logged.
5376 (Whenever a remote delivery process finished, the return path value from
5377 the most recently started remote delivery process was logged.)
5379 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5380 lines when AUTH and/or TLS are in use. This is the "received protocol"
5381 field. Exim used to use "asmtp" for authenticated SMTP, without any
5382 indication (in the protocol name) for TLS use. Now it follows the RFC and
5383 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5384 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5385 names appear in log lines as well as in Received: header lines.
5387 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5388 extensions, and comparison tests, and to fix some bugs.
5390 14. Changes to the "personal" filter test:
5392 (1) The test was buggy in that it was just doing the equivalent of
5393 "contains" tests on header lines. For example, if a user's address was
5394 anne@some.where, the "personal" test would incorrectly be true for
5396 To: susanne@some.where
5398 This test is now done by extracting each address from the header in turn,
5399 and checking the entire address. Other tests that are part of "personal"
5400 are now done using regular expressions (for example, to check local parts
5401 of addresses in From: header lines).
5403 (2) The list of non-personal local parts in From: addresses has been
5404 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5405 taken from the Sieve specification recommendations.
5407 (3) If the message contains any header line starting with "List-" it is
5408 treated as non-personal.
5410 (4) The test for "circular" in the Subject: header line has been removed
5411 because it now seems ill-conceived.
5413 15. Minor typos in src/EDITME comments corrected.
5415 16. Installed latest exipick from John Jetmore.
5417 17. If headers_add on a router specified a text string that was too long for
5418 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5419 of string_sprintf() is now avoided.
5421 18. $message_body_size was not set (it was always zero) when running the DATA
5422 ACL and the local_scan() function.
5424 19. For the "mail" command in an Exim filter, no default was being set for
5425 the once_repeat time, causing a random time value to be used if "once" was
5426 specified. (If the value happened to be <= 0, no repeat happened.) The
5427 default is now 0s, meaning "never repeat". The "vacation" command was OK
5428 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5429 (I found it when inspecting the code).
5431 20. There is now an overall timeout for performing a callout verification. It
5432 defaults to 4 times the callout timeout, which applies to individual SMTP
5433 commands during the callout. The overall timeout applies when there is more
5434 than one host that can be tried. The timeout is checked before trying the
5435 next host. This prevents very long delays if there are a large number of
5436 hosts and all are timing out (e.g. when the network connections are timing
5437 out). The value of the overall timeout can be changed by specifying an
5438 additional sub-option for "callout", called "maxwait". For example:
5440 verify = sender/callout=5s,maxwait=20s
5442 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5443 to the end before writing, but this should make it even safer).
5445 22. Exim was forgetting that it had advertised PIPELINING for the second and
5446 subsequent messages on an SMTP connection. It was also not resetting its
5447 memory on STARTTLS and an internal HELO.
5449 23. When Exim logs an SMTP synchronization error within a session, it now
5450 records whether PIPELINING has been advertised or not.
5452 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5453 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5454 rather than long int.
5456 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5458 26. Added the never_mail option to autoreply.
5464 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5465 crash if the getsockname() call failed; this can happen if a connection is
5466 closed very soon after it is established. The problem was simply in the
5467 order in which certain operations were done, causing Exim to try to write
5468 to the SMTP stream before it had set up the file descriptor. The bug has
5469 been fixed by making things happen in the correct order.
5475 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5476 before the connection was closed, thus losing the rejection response.
5478 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5479 some early Solaris releases, but causes trouble in current releases where
5480 socklen_t is defined.
5482 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5485 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5488 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5489 that releasing the top of it at the end releases what was used for sub-
5490 expansions (unless the block got too big). However, discard this block if
5491 the first thing is a variable or header, so that we can use its block when
5492 it is dynamic (useful for very large $message_headers, for example).
5494 6. Lookups now cache *every* query, not just the most recent. A new, separate
5495 store pool is used for this. It can be recovered when all lookup caches are
5496 flushed. Lookups now release memory at the end of their result strings.
5497 This has involved some general refactoring of the lookup sources.
5499 7. Some code has been added to the store_xxx() functions to reduce the amount
5500 of flapping under certain conditions.
5502 8. log_incoming_interface used to affect only the <= reception log lines. Now
5503 it causes the local interface and port to be added to several more SMTP log
5504 lines, for example "SMTP connection from", and rejection lines.
5506 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5508 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5510 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5511 could be overwritten at the end of the current message (or the start of a
5512 new message if it was set in a HELO ACL). The value is now preserved for
5513 the duration of the SMTP connection.
5515 12. If a transport had a headers_rewrite setting, and a matching header line
5516 contained an unqualified address, that address was qualified, even if it
5517 did not match any rewriting rules. The underlying bug was that the values
5518 of the flags that permit the existence of unqualified sender and recipient
5519 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5520 non-local messages, and by -bnq for local messages) were not being
5521 preserved with the message after it was received.
5523 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5524 "next input=" as part of the text comprising the host identity instead of
5525 the correct text. The code was using the same buffer for two different
5526 strings. However, depending on which order the printing function evaluated
5527 its arguments, the bug did not always show up. Under Linux, for example, my
5528 test suite worked just fine.
5530 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5531 doesn't work with some older versions of Perl. It has been changed to "my",
5532 which in any case is probably the better facility to use.
5534 15. A really picky compiler found some instances of statements for creating
5535 error messages that either had too many or two few arguments for the format
5538 16. The size of the buffer for calls to the DNS resolver has been increased
5539 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5540 for addresses that have a lot of PTR records. This alleviates a problem; it
5541 does not fully solve it.
5543 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5544 buffer now truncates the list and logs the incident, which is the same
5545 action as happens when Exim is looking up a host name and its aliases.
5546 Previously in this situation something unpredictable would happen;
5547 sometimes it was "internal error: store_reset failed".
5549 18. If a server dropped the connection unexpectedly when an Exim client was
5550 using GnuTLS and trying to read a response, the client delivery process
5551 crashed while trying to generate an error log message.
5553 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5554 string, for example:
5556 warn message = H1: something\nH2: something
5558 the text was added as a single header line from Exim's point of view
5559 though it ended up OK in the delivered message. However, searching for the
5560 second and subsequent header lines using $h_h2: did not work. This has been
5561 fixed. Similarly, if a system filter added multiple headers in this way,
5562 the routers could not see them.
5564 20. Expanded the error message when iplsearch is called with an invalid key to
5565 suggest using net-iplsearch in a host list.
5567 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5568 ACLs are no longer actually imposed (and a message to that effect is
5571 22. If a "gecos" field in a passwd entry contained escaped characters, in
5572 particular, if it contained a \" sequence, Exim got it wrong when building
5573 a From: or a Sender: header from that name. A second bug also caused
5574 incorrect handling when an unquoted " was present following a character
5575 that needed quoting.
5577 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5578 was not being matched caselessly.
5580 24. Arranged for all hyphens in the exim.8 source to be escaped with
5583 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5584 properly. Recipient callout cache records were still being keyed to include
5585 the sender, even when use_sender was set false. This led to far more
5586 callouts that were necessary. The sender is no longer included in the key
5587 when use_sender is false.
5589 26. Added "control = submission" modifier to ACLs.
5591 27. Added the ${base62d: operator to decode base 62 numbers.
5593 28. dnsdb lookups can now access SRV records.
5595 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5596 the configuration file.
5598 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5599 (-v) mode. This makes the output for a verbose queue run more intelligible.
5601 31. Added a use_postmaster feature to recipient callouts.
5603 32. Added the $body_zerocount variable, containing the number of binary zero
5604 bytes in the message body.
5606 33. The time of last modification of the "new" subdirectory is now used as the
5607 "mailbox time last read" when there is a quota error for a maildir
5610 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5612 35. Added +ignore_unknown as a special item in host lists.
5614 36. Code for decoding IPv6 addresses in host lists is now included, even if
5615 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5616 address was recognized as an IP address, but was then not correctly decoded
5617 into binary, causing unexpected and incorrect effects when compared with
5624 1. Very minor rewording of debugging text in manualroute to say "list of
5625 hosts" instead of "hostlist".
5627 2. If verify=header_syntax was set, and a header line with an unqualified
5628 address (no domain) and a large number of spaces between the end of the
5629 name and the colon was received, the reception process suffered a buffer
5630 overflow, and (when I tested it) crashed. This was caused by some obsolete
5631 code that should have been removed. The fix is to remove it!
5633 3. When running in the test harness, delay a bit after writing a bounce
5634 message to get a bit more predictability in the log output.
5636 4. Added a call to search_tidyup() just before forking a reception process. In
5637 theory, someone could use a lookup in the expansion of smtp_accept_max_
5638 per_host which, without the tidyup, could leave open a database connection.
5640 5. Added the variables $recipient_data and $sender_data which get set from a
5641 lookup success in an ACL "recipients" or "senders" condition, or a router
5642 "senders" option, similar to $domain_data and $local_part_data.
5644 6. Moved the writing of debug_print from before to after the "senders" test
5647 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5648 problems for message scanning, either using a data ACL, or using
5649 local_scan() because the Received: header was not generated till after they
5650 were called (in order to set the time as the time of reception completion).
5651 I have revised the way this works. The header is now generated after the
5652 body is received, but before the ACL or local_scan() are called. After they
5653 are run, the timestamp in the header is updated.
5659 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5660 before starting a queue runner without re-exec. This happened only when
5661 deliver_drop_privilege was set or when the Exim user was set to root. The
5662 effect of the bug was that timeouts during subsequent deliveries caused
5663 crashes instead of being properly handled. The handler is now left at its
5664 default (and expected) setting.
5666 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5667 message, again when deliver_drop_privilege is set or Exim is run as root.
5668 The bug described in (1) was not present in this case, but the tidying up
5669 of the other signals was missing. I have made the two cases consistent.
5671 3. The ignore_target_hosts setting on a manualroute router was being ignored
5672 for hosts that were looked up using the /MX notation.
5674 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5677 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5678 operated on the sender address. After changing the $sender_address to <>
5679 for the sender address verify, Exim was re-instated it as the original
5680 (before rewriting) address, but remembering that it had rewritten it, so it
5681 wasn't rewriting it again. This bug also had the effect of breaking the
5682 sender address verification caching when the sender address was rewritten.
5684 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5685 This has been changed so that if the ip literal address matches
5686 ignore_target_hosts, the router declines.
5688 7. Added expansion conditions match_domain, match_address, and match_local_
5689 part (NOT match_host).
5691 8. The placeholder for the Received: header didn't have a length field set.
5693 9. Added code to Exim itself and to exim_lock to test for a specific race
5694 condition that could lead to file corruption when using MBX delivery. The
5695 issue is with the lockfile that is created in /tmp. If this file is removed
5696 after a process has opened it but before that process has acquired a lock,
5697 there is the potential for a second process to recreate the file and also
5698 acquire a lock. This could lead to two Exim processes writing to the file
5699 at the same time. The added code performs the same test as UW imapd; it
5700 checks after acquiring the lock that its file descriptor still refers to
5701 the same named file.
5703 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5704 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5707 11. Added the smtp_active_hostname option. If used, this will typically be made
5708 to depend on the incoming interface address. Because $interface_address is
5709 not set up until the daemon has forked a reception process, error responses
5710 that can happen earlier (such as "too many connections") no longer contain
5713 12. If an expansion in a condition on a "warn" statement fails because a lookup
5714 defers, the "warn" statement is abandoned, and the next ACL statement is
5715 processed. Previously this caused the whole ACL to be aborted.
5717 13. Added the iplsearch lookup type.
5719 14. Added ident_timeout as a log selector.
5721 15. Added tls_certificate_verified as a log selector.
5723 16. Added a global option tls_require_ciphers (compare the smtp transport
5724 option of the same name). This controls incoming TLS connections.
5726 17. I finally figured out how to make tls_require_ciphers do a similar thing
5727 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5728 before starting the TLS session.
5730 18. Tabs are now shown as \t in -bP output.
5732 19. If the log selector return_path_on_delivery was set, Exim crashed when
5733 bouncing a message because it had too many Received: header lines.
5735 20. If two routers both had headers_remove settings, and the first one included
5736 a superfluous trailing colon, the final name in the first list and the
5737 first name in the second list were incorrectly joined into one item (with a
5738 colon in the middle).
5744 1. Added -C and -D options to the exinext utility, mainly to make it easier
5745 to include in the automated testing, but these could be helpful when
5746 multiple configurations are in use.
5748 2. The exinext utility was not formatting the output nicely when there was
5749 an alternate port involved in the retry record key, nor when there was a
5750 message id as well (for retries that were specific to a specific message
5751 and a specific host). It was also confused by IPv6 addresses, because of
5752 the additional colons they contain. I have fixed the IPv4 problem, and
5753 patched it up to do a reasonable job for IPv6.
5755 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5756 delivery, the log line now contains "pipelined" if PIPELINING was used.
5758 4. An SMTP transport process used to panic and die if the bind() call to set
5759 an explicit outgoing interface failed. This has been changed; it is now
5760 treated in the same way as a connect() failure.
5762 5. A reference to $sender_host_name in the part of a conditional expansion
5763 that was being skipped was still causing a DNS lookup. This no longer
5766 6. The def: expansion condition was not recognizing references to header lines
5767 that used bh_ and bheader_.
5769 7. Added the _cache feature to named lists.
5771 8. The code for checking quota_filecount in the appendfile transport was
5772 allowing one more file than it should have been.
5774 9. For compatibility with Sendmail, the command line option
5782 and sets the incoming protocol and host name (for trusted callers). The
5783 host name and its colon can be omitted when only the protocol is to be set.
5784 Note the Exim already has two private options, -pd and -ps, that refer to
5785 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5786 "s", but I don't think that's a major issue.
5788 10. A number of refactoring changes to the code, none of which should affect
5791 (a) The number of logging options was getting close to filling up the
5792 32-bit word that was used as a bit map. I have split them into two classes:
5793 those that are passed in the argument to log_write(), and those that are
5794 only ever tested independently outside of that function. These are now in
5795 separate 32-bit words, so there is plenty of room for expansion again.
5796 There is no change in the user interface or the logging behaviour.
5798 (b) When building, for example, log lines, the code previously used a
5799 macro that called string_cat() twice, in order to add two strings. This is
5800 not really sufficiently general. Furthermore, there was one instance where
5801 it was actually wrong because one of the argument was used twice, and in
5802 one call a function was used. (As it happened, calling the function twice
5803 did not affect the overall behaviour.) The macro has been replaced by a
5804 function that can join an arbitrary number of extra strings onto a growing
5807 (c) The code for expansion conditions now uses a table and a binary chop
5808 instead of a serial search (which was left over from when there were very
5809 few conditions). Also, it now recognizes conditions like "pam" even when
5810 the relevant support is not compiled in: a suitably worded error message is
5811 given if an attempt is made to use such a condition.
5813 11. Added ${time_interval:xxxxx}.
5815 12. A bug was causing one of the ddress fields not to be passed back correctly
5816 from remote delivery subprocesses. The field in question was not being
5817 subsequently used, so this caused to problems in practice.
5819 13. Added new log selectors queue_time and deliver_time.
5821 14. Might have fixed a bug in maildirsizefile handling that threw up
5822 "unexpected character" debug warnings, and recalculated the data
5823 unnecessarily. In any case, I expanded the warning message to give more
5826 15. Added the message "Restricted characters in address" to the statements in
5827 the default ACL that block characters like @ and % in local parts.
5829 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5830 Three changes have been made:
5832 (a) There was a serious bug; a negative response to MAIL caused the whole
5833 recipient domain to be cached as invalid, thereby blocking all messages
5834 to all local parts at the same domain, from all senders. This bug has
5835 been fixed. The domain is no longer cached after a negative response to
5836 MAIL if the sender used is not empty.
5838 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5841 (c) A new callout option, "use_sender" has been added for people who want
5842 the modified behaviour.
5848 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5851 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5852 indeed breaks things for older releases.
5854 3. Added additional logging to the case where there is a problem reading data
5855 from a filter that is running in a subprocess using a pipe, in order to
5856 try to track down a specific problem.
5858 4. Testing facility fudge: when running in the test harness and attempting
5859 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5860 getting "No route to host". Convert this to a timeout.
5862 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5865 6. Some OS don't have socklen_t but use size_t instead. This affects the
5866 fifth argument of getsockopt() amongst other things. This is now
5867 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5868 can be set for individual OS. I have set it for SunOS5, OSF1, and
5869 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5870 some earlier ones do not.
5872 7. Change 4.30/15 was not doing the test caselessly.
5874 8. The standard form for an IPv6 address literal was being rejected by address
5875 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5876 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5877 this, as well as the form without the "IPv6" on the front (but only when
5878 address literals are enabled, of course).
5880 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5882 10. Exim crashed if a message with an empty sender address specified by -f
5883 encountered a router with an errors_to setting. This could be provoked only
5884 by a command such as
5888 where an empty string was supplied; "<>" did not hit this bug.
5890 11. Installed PCRE release 4.5.
5892 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5893 remained set. It is now erased.
5895 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5896 times from message ids (which are base 36 rather than the normal 62).
5898 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5899 were being counted as actual protocol errors, and logged if the log
5900 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5901 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5902 and DATA following a set of rejected RCPTs do not count as protocol errors.
5903 In other words, Exim assumes they were pipelined, though this may not
5904 actually be the case. Of course, in all cases the client gets an
5905 appropriate error code.
5907 15. If a lookup fails in an ACL condition, a message about the failure may
5908 be available; it is used if testing the ACL cannot continue, because most
5909 such messages specify what the cause of the deferral is. However, some
5910 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5911 that caused an old message to be retained and used if a later statement
5912 caused a defer, replacing the real cause of the deferral.
5914 16. If an IP address had so many PTR records that the DNS lookup buffer
5915 was not large enough to hold them, Exim could crash while trying to process
5916 the truncated data. It now detects and logs this case.
5918 17. Further to 4.21/58, another change has been made: if (and only if) the
5919 first line of a message (the first header line) ends with CRLF, a bare LF
5920 in a subsequent header line has a space inserted after it, so as not to
5921 terminate the header.
5923 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5924 unnecessarily, used atoi() instead of strtol(), and didn't check the
5925 termination when getting file sizes from file names by regex.
5927 19. Completely re-implemented the support for maildirsize files, in the light
5928 of a number of problems with the previous contributed implementation
5929 (4.30/29). In particular:
5931 . If the quota is zero, the maildirsize file is maintained, but no quota is
5934 . If the maildir directory does not exist, it is created before any attempt
5935 to write a maildirsize file.
5937 . The quota value in the file is just a cache; if the quota is changed in
5938 the transport, the new value overrides.
5940 . A regular expression is available for excluding directories from the
5943 20. The autoreply transport checks the characters in options that define the
5944 message's headers; it allows continued headers, but it was checking with
5945 isspace() after an embedded newline instead of explicitly looking for a
5948 21. If all the "regular" hosts to which an address was routed had passed their
5949 expiry times, and had not reached their retry times, the address was
5950 bounced, even if fallback hosts were defined. Now Exim should go on to try
5953 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5954 equivalent code in the SMTP transport. Some hosts send humungous responses
5955 to HELO/EHLO, more than 1024 it seems.
5957 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5958 gives compiler warnings in some environments. I've now done it "properly",
5961 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5962 (because of problems with the built-in one) was declared to return uschar *
5963 instead of char *, causing compiler failure.
5965 25. Fixed a file descriptor leak when processing alias/forward files.
5967 26. Fixed a minor format string issue in dbfn.c.
5969 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5971 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5972 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5975 29. When a sender address is verified, it is cached, to save repeating the test
5976 when there is more than one recipient in a message. However, when the
5977 verification involves a callout, it is possible for different callout
5978 options to be set for different recipients. It is too complicated to keep
5979 track of this in the cache, so now Exim always runs a verification when a
5980 callout is required, relying on the callout cache for the optimization.
5981 The overhead is duplication of the address routing, but this should not be
5984 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5985 to be verified with callout=postmaster, and the main callout worked but the
5986 postmaster check failed, the verification correctly failed. However, if a
5987 subsequent RCPT command asked for sender verification *without* the
5988 postmaster check, incorrect caching caused this verification also to fail,
5991 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5992 it was not caching the DNS options (qualify_single, search_parents) that
5993 were used when the lookup failed. A subsequent lookup with different
5994 options therefore always gave the same answer, though there were cases
5995 where it should not have. (Example: a "domains = !$mx_any" option on a
5996 dnslookup router: the "domains" option is always processed without any
5997 widening, but the router might have qualify_single set.) Now Exim uses the
5998 cached value only when the same options are set.
6000 32. Added John Jetmore's "exipick" utility to the distribution.
6002 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6003 than a timeout (e.g. a certificate is required, and is not provided), an
6004 Exim server now closes the connection immediately. Previously it waited for
6005 the client to close - but if the client is SSL, it seems that they each
6006 wait for each other, leading to a delay before one of them times out.
6008 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6009 maintained 0.8.x compatibility because I don't think many are using it, and
6010 it is clearly obsolete.
6012 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6015 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6016 client certificate was expired. A simple patch fixes this, though I don't
6017 understand the full logic of why the verify callback is called multiple
6020 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6021 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6022 which causes problems with some clients (such as the Certicom SSL Plus
6023 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6024 disables the coutermeasure allowing Eudora to connect."
6026 38. Exim was not checking that a write() to a log file succeeded. This could
6027 lead to Bad Things if a log got too big, in particular if it hit a file
6028 size limit. Exim now panics and dies if it cannot write to a log file, just
6029 as it does if it cannot open a log file.
6031 39. Modified OS/Makefile-Linux so that it now contains
6033 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6035 The two -D definitions ensure that Exim is compiled with large file
6036 support, which makes it possible to handle log files that are bigger than
6039 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6040 instance) a domain was checked against a named list that involved a lookup,
6041 causing $domain_data to be set, then another domain was checked against the
6042 same list, then the first domain was re-checked, the value of $domain_data
6043 after the final check could be wrong. In particular, if the second check
6044 failed, it could be set empty. This bug probably also applied to
6047 41. The strip_trailing_dot option was not being applied to the address given
6048 with the -f command-line option.
6050 42. The code for reading a message's header from the spool was incrementing
6051 $received_count, but never initializing it. This meant that the value was
6052 incorrect (doubled) while delivering a message in the same process in which
6053 it was received. In the most common configuration of Exim, this never
6054 happens - a fresh exec is done - but it can happen when
6055 deliver_drop_privilege is set.
6057 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6058 it now includes up to 150 characters of the unexpected data in the log
6061 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6062 and building data strings. The size of both of these buffers was 10 000
6063 bytes - far larger than anybody would *ever* want, thought I. Needless to
6064 say, somebody hit the limit. I have increased the maximum line length to
6065 20 000 and the maximum data length of concatenated lines to 100 000. I have
6066 also fixed two bugs, because there was no checking on these buffers. Tsk,
6067 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6068 buffer is too small.
6070 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6071 lsearch lookups. Now it does.
6073 46. When parsing a route_list item in a manualroute router, a fixed-length
6074 buffer was used for the list of hosts. I made this 1024 bytes long,
6075 thinking that nobody would ever have a list of hosts that long. Wrong.
6076 Somebody had a whole pile of complicated expansion conditions, and the
6077 string was silently truncated, leading to an expansion error. It turns out
6078 that it is easier to change to an unlimited length (owing to other changes
6079 that have happened since this code was originally written) than to build
6080 structure for giving a limitation error. The length of the item that
6081 expands into the list of hosts is now unlimited.
6083 47. The lsearch lookup could not handle data where the length of text line was
6084 more than 4095 characters. Such lines were truncated, leading to shortened
6085 data being returned. It should now handle lines of any length.
6087 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6088 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6091 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6092 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6093 no longer happens in comment lines. A list of replacements is now placed
6094 at the head of all of the source files, except those whose only change is
6095 to replace PERL_COMMAND in the very first #! line.
6097 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6098 messages on the queue, with a bottom-up merge sort, using code contributed
6099 by Michael Haardt. This should make operations like -bp somewhat faster on
6100 large queues. It won't affect queue runners, except when queue_run_in_order
6103 51. Installed eximstats 1.31 in the distribution.
6105 52. Added support for SRV lookups to the dnslookup router.
6107 53. If an ACL referred to $message_body or $message_body_end, the value was not
6108 reset for any messages that followed in the same SMTP session.
6110 54. The store-handling optimization for building very long strings was not
6111 differentiating between the different store pools. I don't think this
6112 actually made any difference in practice, but I've tidied it.
6114 55. While running the routers to verify a sender address, $sender_address
6115 was still set to the sender address. This is wrong, because when routing to
6116 send a bounce to the sender, it would be empty. Therefore, I have changed
6117 it so that, while verifying a sender address, $sender_address is set to <>.
6118 (There is no change to what happens when verifying a recipient address.)
6120 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6121 target A or AAAA records (if not already returned) without resetting the
6122 qualify_single or search_parents options of the DNS resolver. These are
6123 inappropriate in this case because the targets of MX and SRV records must
6124 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6125 target that, when qualified, matched something in the local domain. These
6126 two options are now turned off when doing these lookups.
6128 57. It seems that at least some releases of Reiserfs (which does not have the
6129 concept of a fixed number of inodes) returns zero and not -1 for the
6130 number of available inodes. This interacted badly with check_spool_inodes,
6131 which assumed that -1 was the "no such thing" setting. What I have done is
6132 to check that the total number of inodes is greater than zero before doing
6133 the test of how many are available.
6135 58. When a "warn" ACL statement has a log_message modifier, the message is
6136 remembered, and not repeated. This is to avoid a lot of repetition when a
6137 message has many recipients that cause the same warning to be written.
6138 However, Exim was preserving the list of already written lines for an
6139 entire SMTP session, which doesn't seem right. The memory is now reset if a
6140 new message is started.
6142 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6143 debugging output unless log_rewrite was also set.
6145 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6146 of (int)(handle) when we know that handle contains (void *)(-1).
6148 61. The Exim daemon panic-logs an error return when it closes the incoming
6149 connection. However "connection reset by peer" seems to be common, and
6150 isn't really an error worthy of noting specially, so that particular error
6153 62. When Exim is trying to find all the local interfaces, it used to panic and
6154 die if the ioctl to get the interface flags failed. However, it seems that
6155 on at least one OS (Solaris 9) it is possible to have an interface that is
6156 included in the list of interfaces, but for which you get a failure error
6157 for this call. This happens when the interface is not "plumbed" into a
6158 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6159 failure of the "get flags" call assumes that the interface is down.
6161 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6162 makes life easier for people who are doing arithmetic on fields extracted
6163 from dates, where you often get leading zeros that should not be
6164 interpreted as octal.
6166 64. Added qualify_domain to the redirect router, to override the global
6169 65. If a pathologically long header line contained very many addresses (the
6170 report of this problem mentioned 10 000) and each of them was rewritten,
6171 Exim could use up a very large amount of memory. (It kept on making new
6172 copies of the header line as it rewrote, and never released the old ones.)
6173 At the expense of a bit more processing, the header rewriting function has
6174 been changed so that it no longer eats memory in this way.
6176 66. The generation of the Received: header has been moved from the time that a
6177 message starts to be received, to the time that it finishes. The timestamp
6178 in the Received: header should now be very close to that of the <= log
6179 line. There are two side-effects of this change:
6181 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6182 logged header lines no longer include the local Received: line, because
6183 it has not yet been created. The same applies to a copy of the message
6184 that is returned to a non-SMTP sender when a message is rejected.
6186 (b) When a filter file is tested using -bf, no additional Received: header
6187 is added to the test message. After some thought, I decided that this
6190 This change does not affect the value of $received_for. It is still set
6191 after address rewriting, but before local_scan() is called.
6193 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6195 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6196 gave an unhelpful panic error message, and a defer error. I have managed to
6197 change this behaviour so that it now rejects any supplied certificate,
6198 which seems right, as the list of acceptable certificates is empty.
6200 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6201 gave an unhelpful defer error. I have not managed to make this reject any
6202 supplied certificates, but the error message it gives is "no certificate
6203 supplied", which is not helpful.
6205 70. exigrep's output now also includes lines that are not associated with any
6206 message, but which match the given pattern. Implemented by a patch from
6207 Martin Sluka, which also tidied up the Perl a bit.
6209 71. Recipient callout verification, like sender verification, was using <> in
6210 the MAIL FROM command. This isn't really the right thing, since the actual
6211 sender may affect whether the remote host accepts the recipient or not. I
6212 have changed it to use the actual sender in the callout; this means that
6213 the cache record is now keyed on a recipient/sender pair, not just the
6214 recipient address. There doesn't seem to be a real danger of callout loops,
6215 since a callout by the remote host to check the sender would use <>.
6216 [SEE ABOVE: changed after hitting problems.]
6218 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6219 temporary errors. However, in the case of such a code being given after
6220 the end of a data transmission (i.e. after ".") Exim was failing to write
6221 a retry record for the message. (Yes, there was some broken host that was
6222 actually sending 8xx at this point.)
6224 73. An unknown lookup type in a host list could cause Exim to panic-die when
6225 the list was checked. (An example that provoked this was putting <; in the
6226 middle of a list instead of at the start.) If this happened during a DATA
6227 ACL check, a -D file could be left lying around. This kind of configuration
6228 error no longer causes Exim to die; instead it causes a defer error. The
6229 incident is still logged to the main and panic logs.
6231 74. Buglet left over from Exim 3 conversion. The message "too many messages
6232 in one connection" was written to the rejectlog but not the mainlog, except
6233 when address rewriting (yes!) was being logged.
6235 75. Added write_rejectlog option.
6237 76. When a system filter was run not as root (that is, when system_filter_user
6238 was set), the values of the $n variables were not being returned to the
6239 main process; thus, they were not subsequently available in the $sn
6242 77. Added +return_path_on_delivery log selector.
6244 78. A connection timeout was being treated differently from recipients deferred
6245 when testing hosts_max_try with a message that was older than the host's
6246 retry timeout. (The host should not be counted, thus allowing all hosts to
6247 be tried at least once before bouncing.) This may have been the cause of an
6248 occasionally reported bug whereby a message would remain on the queue
6249 longer than the retry timeout, but would be bounced if a delivery was
6250 forced. I say "may" because I never totally pinned down the problem;
6251 setting up timeout/retry tests is difficult. See also the next item.
6253 79. The ultimate address timeout was not being applied to errors that involved
6254 a combination of host plus message (for example, a timeout on a MAIL
6255 command). When an address resolved to a number of possible hosts, and they
6256 were not all tried for each delivery (e.g. because of hosts_max_try), a
6257 message could remain on the queue longer than the retry timeout.
6259 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6262 81. Fixed an obscure SMTP outgoing bug which required at least the following
6263 conditions: (a) there was another message waiting for the same server;
6264 (b) the server returned 5xx to all RCPT commands in the first message so
6265 that the message was not completed; (c) the server dropped the connection
6266 or gave a negative response to the RSET that Exim sends to abort the
6267 transaction. The observed case was a dropped connection after DATA that had
6268 been sent in pipelining mode. That is, the server had advertised PIPELINING
6269 but was not implementing it correctly. The effect of the bug was incorrect
6270 behaviour, such as trying another host, and this could lead to a crash.
6276 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6277 and daemon.c were passed as pointers to ints; they should have been
6278 pointers to socklen_t variables (which are typically unsigned ints).
6280 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6283 3. Fixed a really odd bug that affected only the testing scheme; patching a
6284 certain fixed string in the binary changed the value of another string that
6285 happened to be identical to the end of the original first string.
6287 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6288 name", it returns that address as the IP address. On some operating
6289 systems (e.g. Solaris), it also passes back the IP address string as the
6290 "host name". However, on others (e.g. Linux), it passes back an empty
6291 string. Exim wasn't checking for this, and was changing the host name to an
6292 empty string, assuming it had been canonicalized.
6294 5. Although rare, it is permitted to have more than one PTR record for a given
6295 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6296 all the names associated with an address, because they do in Solaris.
6297 However, it seems that they do not in Linux for data that comes from the
6298 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6299 I found this out when I moved to a new Linux workstation and tried to run
6300 the Exim test suite.
6302 To get round this problem I have changed the code so that it now does its
6303 own call to the DNS to look up PTR records when searching for a host name.
6304 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6305 addresses that are only in /etc/hosts are still found.
6307 This behaviour is, however, controlled by an option called host_lookup_
6308 order, which defaults to "bydns:byaddr". If people want to use the other
6309 order, or indeed, just use one or the other means of lookup, they can
6310 specify it in this variable.
6312 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6313 some operating systems, this comes back from gethostbyaddr() as an empty
6314 string, and this is what Exim used to test for. However, it seems that in
6315 other systems, "." is yielded. Exim now tests for this case too.
6317 7. The values of check_spool_space and check_log_space are now held internally
6318 as a number of kilobytes instead of an absolute number of bytes. If a
6319 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6320 kilobyte. This means that much larger values can be stored.
6322 8. Exim monitor: an attempt to get the action menu when not actually pointing
6323 at a message produces an empty menu entitled "No message selected". This
6324 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6325 no entries in it ("Shell widget menu has zero width and/or height"). So I
6326 have added a single, blank menu entry in this case.
6328 9. Added ${quote_local_part.
6330 10. MIME decoding is now applied to the contents of Subject: header lines when
6333 11. Now that a reference to $sender_host_address automatically causes a reverse
6334 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6335 host lookup before query-style lookups in lists that might use this
6336 variable. This has therefore been abolished, and the "net-" prefix is no
6337 longer necessary for query-style lookups.
6339 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6340 have been a typo for LFLAGS, so it has been changed.
6342 13. The install script calls Exim with "-C /dev/null" in order to find the
6343 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6344 to be output. However, since Exim outputs its version number before the
6345 error, it didn't break the script. It just looked ugly. I fixed this by
6346 always allowing "-C /dev/null" if the caller is root.
6348 14. Ignore overlarge ACL variable number when reading spool file - insurance
6349 against a later release with more variables having written the file.
6351 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6352 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6353 this, as well as the form without the "IPv6" on the front.
6355 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6356 OS/Makefile-Darwin file.
6358 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6359 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6361 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6362 variable. However, some OS use ints for inodes. I've added cast to long int
6363 to get rid of the compiler warning.
6365 19. I had forgotten to lock out "/../" in configuration file names when
6366 ALT_CONFIG_PREFIX was set.
6368 20. Routers used for verification do not need to specify transports. However,
6369 if such a router generated a host list, and callout was configured, Exim
6370 crashed, because it could not find a port number from the (non-existent)
6371 transport. It now assumes port 25 in this circumstance.
6373 21. Added the -t option to exigrep.
6375 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6376 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6377 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6378 them is set, LOOKUP_LSEARCH is forced.
6380 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6382 24. Added sender and host information to the "rejected by local_scan()" log
6383 line; previously there was no indication of these.
6385 25. Added .include_if_exists.
6387 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6388 Linux. It turns out that not all file systems support this. Apparently some
6389 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6390 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6391 not supported on the file descriptor, is now ignored when Exim is trying to
6392 sync a directory. This applies only to Linux.
6394 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6396 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6397 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6400 29. Added support for maildirsize files from supplied patch (modified a bit).
6402 30. The use of :fail: followed by an empty string could lead Exim to respond to
6403 sender verification failures with (e.g.):
6405 550 Verification failed for <xxx>
6406 550 Sender verify failed
6408 where the first response line was missing the '-' that indicates it is not
6409 the final line of the response.
6411 31. The loop for finding the name of the user that called Exim had a hardwired
6412 limit of 10; it now uses the value of finduser_retries, which is used for
6413 all other user lookups.
6415 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6418 33. Exim was neglecting to zero errno before one call of strtol() when
6419 expanding a string and expecting an integer value. On some systems this
6420 resulted in spurious "integer overflow" errors. Also, it was casting the
6421 result into an int without checking.
6423 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6424 did not work. The code looks as if it has *never* worked, though it appears
6425 to have been documented since at least release 1.62. I have made it work.
6427 35. The "timeout_DNS" error in retry rules, also documented since at least
6428 1.62, also never worked. As it isn't clear exactly what this means, and
6429 clearly it isn't a major issue, I have abolished the feature by treating it
6430 as "timeout", and writing a warning to the main and panic logs.
6432 36. The display of retry rules for -brt wasn't always showing the error code
6435 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6436 timeout_connect_A, timeout_connect_MX.
6438 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6439 to the empty sender.
6441 39. The daemon was not analysing the content of -oX till after it had closed
6442 stderr and disconnected from the controlling terminal. This meant that any
6443 syntax errors were only noted on the panic log, and the return code from
6444 the command was 0. By re-arranging the code a little, I've made the
6445 decoding happen first, so such errors now appear on stderr, and the return
6446 code is 1. However, the actual setting up of the sockets still happens in
6447 the disconnected process, so errors there are still only recorded on the
6450 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6451 connections (as happens on some IP stacks) was logged at start up time as
6452 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6453 it from "IPv6 and IPv4", which means that two separate sockets are being
6456 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6457 says whether AF_INET or AF_INET6 was passed as an argument.
6459 42. Exiwhat output was messed up when time zones were included in log
6462 43. Exiwhat now gives more information about the daemon's listening ports,
6463 and whether -tls-on-connect was used.
6465 44. The "port" option of the smtp transport is now expanded.
6467 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6468 silently ignored. Now an error message is written to the main and panic
6471 46. There's a new ACL modifier called "logwrite" which writes to a log file
6472 as soon as it is encountered.
6474 47. Added $local_user_uid and $local_user_gid at routing time.
6476 48. Exim crashed when trying to verify a sender address that was being
6479 49. Exim was recognizing only a space character after ".include". It now also
6480 recognizes a tab character.
6482 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6483 extracting the relevant information from the specification. The man page no
6484 longer contains scrambled data for the -d option, and I've added a section
6485 at the front about calling Exim under different names.
6487 51. Added "extra_headers" argument to the "mail" command in filter files.
6489 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6492 53. Installed eximstats 1.29.
6494 54. Added transport_filter_timeout as a generic transport option.
6496 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6497 Cc: header lines. This was required by RFC 822, but it not required by RFC
6500 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6501 incoming messages that did not have them. Now it does so only if the
6502 message originates locally, that is, if there is no associated remote host
6503 address. When Resent- header lines are present, this applies to the Resent-
6504 lines rather than the non-Resent- lines.
6506 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6507 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6509 58. Messages for configuration errors now include the name of the main
6510 configuration file - useful now that there may be more than one file in a
6511 list (.included file names were always shown).
6513 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6514 for those rare installations that do not start the daemon as root or run it
6515 setuid root. I've cut out the call to initgroups() if the daemon is not
6518 60. The Exim user and group can now be bound into the binary as text strings
6519 that are looked up at the start of Exim's processing.
6521 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6523 62. Added $mailstore_basename variable.
6525 63. Installed patch to sieve.c from Michael Haardt.
6527 64. When Exim failed to open the panic log after failing to open the main log,
6528 the original message it was trying to log was written to stderr and debug
6529 output, but if they were not available (the usual case in production), it
6530 was lost. Now it is written to syslog before the two lines that record the
6531 failures to open the logs.
6533 65. Users' Exim filters run in subprocesses under the user's uid. It is
6534 possible for a "deliver" command or an alias in a "personal" command to
6535 provoke an address rewrite. If logging of address rewriting is configured,
6536 this fails because the process is not running as root or exim. There may be
6537 a better way of dealing with this, but for the moment (because 4.30 needs
6538 to be released), I have disabled address rewrite logging when running a
6539 filter in a non-root, non-exim process.
6545 1. The buildconfig auxiliary program wasn't quoting the value set for
6546 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6547 not defined. This bug was masked in 4.22 by the effect that was fixed in
6550 2. Some messages that were rejected after a message id was allocated were
6551 shown as "incomplete" by exigrep. It no longer does this for messages that
6552 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6554 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6555 have allow_domain_literals set, the ID did not get logged in the <= line.
6556 Domain literals are now always recognized in Message-ID: header lines.
6558 4. The first argument for a ${extract expansion item is the key name or field
6559 number. Leading and trailing spaces in this item were not being ignored,
6560 causing some misleading effects.
6562 5. When deliver_drop_privilege was set, single queue runner processes started
6563 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6564 same command in the process it spins off) were not dropping privilege.
6566 6. When the daemon running as "exim" started a queue runner, it always
6567 re-executed Exim in the spun-off process. This is a waste of effort when
6568 deliver_drop_privilege is set. The new process now just calls the
6569 queue-runner function directly.
6575 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6578 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6579 ignored. Though the use of -oP was forcing the writing of a pid file, it
6580 was always written to the default place.
6582 3. If the message "no IP address found for host xxxx" is generated during
6583 incoming verification, it is now followed by identification of the incoming
6584 connection (so you can more easily find what provoked it).
6586 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6588 5. Added some features to "harden" Exim a bit more against certain attacks:
6590 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6591 be put in Local/Makefile. This is like the never_users runtime option,
6592 but it cannot be overridden. The default setting is "root".
6594 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6595 prefix string with which any file named in a -C command line option
6598 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6599 is retained for -C and -D only if the caller of Exim is root. Without
6600 it, the exim user may also use -C and -D and retain privilege.
6602 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6603 command line option is disabled.
6605 6. Macro names set by the -D option must start with an upper case letter, just
6606 like macro names defined in the configuration file.
6608 7. Added "dereference=" facility to LDAP.
6610 8. Two instances of the typo "uknown" in the source files are fixed.
6612 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6613 the Configure-Makefile script screwed up while processing it.
6615 10. Incorporated PCRE 4.4.
6617 11. The SMTP synchronization check was not operating right at the start of an
6618 SMTP session. For example, it could not catch a HELO sent before the client
6619 waited for the greeting. There is now a check for outstanding input at the
6620 point when the greeting is written. Because of the duplex, asynchronous
6621 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6622 way, but not yet received, when the check is performed.
6624 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6625 on TCP/IP sockets, because this apparently causes some broken clients to
6628 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6629 unchanged) from the Cygwin maintainer.
6631 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6632 was supported instead of testing for mbx. Effectively a typo.
6634 15. The spa authenticator server code was not checking that the input it
6635 received was valid base64.
6637 16. The debug output line for the "set" modifier in ACLs was not showing the
6638 name of the variable that was being set.
6640 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6642 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6643 lookup on its own. Something else was needed to trigger the lookup. For
6644 example, a match in host_lookup or the need for a host name in a host list.
6645 Now, if $sender_host_name is referenced and the host name has not yet been
6646 looked up, a lookup is performed. If the lookup fails, the variable remains
6647 empty, and $host_lookup_failed is set to "1".
6649 19. Added "eqi" as a case-independent comparison operator.
6651 20. The saslauthd authentication condition could segfault if neither service
6652 nor realm was specified.
6654 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6655 error message that was logged was misleading, and incoming SMTP
6656 connections were dropped. The message is now more accurate, and temporary
6657 errors are given to SMTP connections.
6659 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6660 (except RSET) with a 421 error, until QUIT is received. However, it was
6661 failing to send a response to QUIT.
6663 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6664 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6665 ACL is now run after the helo_try_verify_hosts code.
6667 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6668 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6669 case-independent, so other case variants are also recognized). Apparently
6670 some systems use these upper case variants.
6672 25. If more than two messages were waiting for the same host, and a transport
6673 filter was specified for the transport, Exim sent two messages over the
6674 same TCP/IP connection, and then failed with "socket operation on non-
6675 socket" when it tried to send the third.
6677 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6679 27. The extern definition of crypt16() in expand.c was not being excluded when
6680 the OS had its own crypt16() function.
6682 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6683 as a preferred synonym for return_size_limit, both as an option and as an
6686 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6688 30. Changed the default configuration ACL to relax the local part checking rule
6689 for addresses that are not in any local domains. For these addresses,
6690 slashes and pipe symbols are allowed within local parts, but the sequence
6691 /../ is explicitly forbidden.
6693 31. SPA server authentication was not clearing the challenge buffer before
6696 32. log_message in a "warn" ACL statement was writing to the reject log as
6697 well as to the main log, which contradicts the documentation and doesn't
6698 seem right (because no rejection is happening). So I have stopped it.
6700 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6701 However, I am unable to do any testing of this.
6703 34. Fixed an infelicity in the appendfile transport. When checking directories
6704 for a mailbox, to see if any needed to be created, it was accidentally
6705 using path names with one or more superfluous leading slashes; tracing
6706 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6708 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6709 contents are added to the log line that is written for every discarded
6710 recipient. (Previously a log_message setting was ignored.)
6712 36. The ${quote: operator now quotes the string if it is empty.
6714 37. The install script runs exim in order to find its version number. If for
6715 some reason other than non-existence or emptiness, which it checks, it
6716 could not run './exim', it was installing it with an empty version number,
6717 i.e. as "exim-". This error state is now caught, and the installation is
6720 38. An argument was missing from the function that creates an error message
6721 when Exim fails to connect to the socket for saslauthd authentication.
6722 This could cause Exim to crash, or give a corrupted message.
6724 39. Added isip, isip4, and isip6 to ${if conditions.
6726 40. The ACL variables $acl_xx are now saved with the message, and can be
6727 accessed later in routers, transports, and filters.
6729 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6730 strings in the file are not string-expanded.
6732 42. If a MAIL command specified a SIZE value that was too large to fit into an
6733 int variable, the check against message_size_limit failed. Such values are
6734 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6735 day this will have to be increased, but I don't think I want to be around
6736 when emails are that large.
6743 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6744 iconv() is not standard in FreeBSD.
6746 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6747 IPv6 enabled. The observed symptom was a segmentation fault on return from
6748 the function os_common_find_running_interfaces() in src/os.c.
6750 3. In the check_special_case() function in daemon.c I had used "errno" as an
6751 argument name, which causes warnings on some systems. This was basically a
6752 typo, since it was named "eno" in the comments!
6754 4. The code that waits for the clock to tick (at a resolution of some fraction
6755 of a second) so as to ensure message-id uniqueness was always waiting for
6756 at least one whole tick, when it could have waited for less. [This is
6757 almost certainly not relevant at current processor speeds, where it is
6758 unlikely to ever wait at all. But we try to future-proof.]
6760 5. The function that sleeps for a time interval that includes fractions of a
6761 second contained a race. It did not block SIGALRM between setting the
6762 timer, and suspending (a couple of lines later). If the interval was short
6763 and the sigsuspend() was delayed until after it had expired, the suspension
6764 never ended. On busy systems this could lead to processes getting stuck for
6767 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6768 process, before it forks any delivery processes. The open lookup caching
6769 mechanism meant that the open file or database connection was passed into
6770 the delivery process. The problem was that delivery processes always tidy
6771 up cached lookup data. This could cause a problem for the next delivery
6772 process started by the queue runner, because the external queue runner
6773 process does not know about the closure. So the next delivery process
6774 still has data in the lookup cache. In the case of a file lookup, there was
6775 no problem because closing a file descriptor in a subprocess doesn't affect
6776 the parent. However, if the lookup was caching a connection to a database,
6777 the connection was closed, and the second delivery process was likely to
6778 see errors such as "PGSQL: query failed: server closed the connection
6779 unexpectedly". The problem has been fixed by closing all cached lookups
6780 in a queue runner before running a delivery process.
6782 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6783 seem to have the "const" qualifier which it has on other OS. I've
6786 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6787 *of the same type* (client or server) with the same public name that an
6788 error should be diagnosed.
6790 9. When Exim looked up a host name for an IP address, but failed to find the
6791 original IP address when looking up the host name (a safety check), it
6792 output the message "<ip address> does not match any IP for NULL", which was
6793 confusing, to say the least. The bug was that the host name should have
6794 appeared instead of "NULL".
6796 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6797 user that is built into the binary, and the -C or -D options is used, root
6798 privilege is dropped before the configuration file is read. In addition,
6799 logging is switched to stderr instead of the normal log files. If the
6800 configuration then re-defines the Exim user, the unprivileged environment
6801 is probably not what is expected, so Exim logs a panic warning message (but
6804 However, if deliver_drop_privilege is set, the unprivileged state may well
6805 be exactly what is intended, so the warning has been cut out in that case,
6806 and Exim is allowed to try to write to its normal log files.
6812 1. smtp_return_error_details was not giving details for temporary sender
6813 or receiver verification errors.
6815 2. Diagnose a configuration error if two authenticators have the same public
6818 3. Exim used not to create the message log file for a message until the first
6819 delivery attempt. This could be confusing when incoming messages were held
6820 for policy or load reasons. The message log file is now created at the time
6821 the message is received, and an initial "Received" line is written to it.
6823 4. The automatically generated man page for command line options had a minor
6824 bug that caused no ill effects; however, a more serious problem was that
6825 the procedure for building the man page automatically didn't always
6826 operate. Consequently, release 4.20 contains an out-of-date version. This
6827 shouldn't happen again.
6829 5. When building Exim with embedded Perl support, the script that builds the
6830 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6831 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6833 6. The freeze_tell option was not being used for messages that were frozen on
6834 arrival, either by an ACL or by local_scan().
6836 7. Added the smtp_incomplete_transaction log selector.
6838 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6839 was accepting AUTH without a new EHLO.
6841 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6842 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6845 10. Logging of TCP/IP connections (when configured) now happens in the main
6846 daemon process instead of the child process, so that the TCP/IP connection
6847 count is more accurate (but it can never be perfect).
6849 11. The use of "drop" in a nested ACL was not being handled correctly in the
6850 outer ACL. Now, if condition failure induced by the nested "drop" causes
6851 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6852 or "require"), the connection is dropped.
6854 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6855 that yield "discard" can now be used with an "accept" or a "discard" verb,
6856 but an error is generated for any others (because I can't see a useful way
6857 to define what should happen).
6859 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6860 are now processed in the same way as lines in the Exim configuration file.
6861 In particular, continuation lines are supported.
6863 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6865 15. Added -ti meaning -t -i.
6867 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6868 domains, and warn by logging if others are found.
6870 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6871 returned from GIFCONF when Exim is trying to find the list of interfaces on
6872 a host. The code in os.c has been modified to copy each ifreq to an aligned
6873 structure in all cases.
6875 Also, in some cases, the returned ifreq's were being copied to a 'struct
6876 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6877 means the last couple of bytes of an IPv6 address could be chopped if the
6878 ifreq contained only a normal sockaddr (14 bytes storage).
6880 18. Named domain lists were not supported in the hosts_treat_as_local option.
6881 An entry such as +xxxx was not recognized, and was treated as a literal
6884 19. Ensure that header lines added by a DATA ACL are included in the reject log
6885 if the ACL subsequently rejects the message.
6887 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6888 MD5 (which is deprecated).
6890 21. When testing a filter file using -bf, Exim was writing a message when it
6891 took the sender from a "From " line in the message, but it was not doing so
6892 when it took $return_path from a Return-Path: header line. It now does.
6894 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6895 with a valid header line field name (a series of printing characters
6896 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6898 23. Changed "disc" in the source to "disk" to conform to the documentation and
6899 the book and for uniformity.
6901 24. Ignore Sendmail's -Ooption=value command line item.
6903 25. When execve() failed while trying to run a command in a pipe transport,
6904 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6905 could be confused with a return value of 69 from the command itself. This
6906 has been changed to 127, the value the shell returns if it is asked to run
6907 a non-existent command. The wording for the related log line suggests a
6908 non-existent command as the problem.
6910 26. If received_header_text expands to an empty string, do not add a Received:
6911 header line to the message. (Well, it adds a token one on the spool, but
6912 marks it "old" so that it doesn't get used or transmitted.)
6914 27. Installed eximstats 1.28 (addition of -nt option).
6916 28. There was no check for failure on the call to getsockname() in the daemon
6917 code. This can fail if there is a shortage of resources on the system, with
6918 ENOMEM, for example. A temporary error is now given on failure.
6920 29. Contrary to the C standard, it seems that in some environments, the
6921 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6922 program. Exim now does this explicitly; it affects the formatting of
6923 timestamps using strftime().
6925 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6926 complaints. I've now initialized all the variables, to avoid this.
6928 32. Header lines added by a system filter were not being "seen" during
6929 transport-time rewrites.
6931 33. The info_callback() function passed to OpenSSL is set up with type void
6932 (*)(SSL *, int, int), as described somewhere. However, when calling the
6933 function (actually a macro) that sets it up, the type void(*)() is
6934 expected. I've put in a cast to prevent warnings from picky compilers.
6936 34. If a DNS black list lookup found a CNAME record, but there were no A
6937 records associated with the domain it pointed at, Exim crashed.
6939 35. If a DNS black list lookup returned more than one A record, Exim ignored
6940 all but the first. It now scans all returned addresses if a particular IP
6941 value is being sought. In this situation, the contents of the
6942 $dnslist_value variable are a list of all the addresses, separated by a
6945 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6946 to accept a host name and all its aliases if the forward lookup for any of
6947 them yielded the IP address of the incoming connection. Now it accepts only
6948 those names whose forward lookup yields the correct IP address. Any other
6949 names are discarded. This closes a loophole whereby a rogue DNS
6950 administrator could create reverse DNS records to break through a
6951 wildcarded host restriction in an ACL.
6953 37. If a user filter or a system filter that ran in a subprocess used any of
6954 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6955 the wrong values were passed to the pipe command ($thisaddress had the
6956 value of $0, $0 had the value of $1, etc). This bug was introduced by
6957 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6959 38. Improved the line breaking for long SMTP error messages from ACLs.
6960 Previously, if there was no break point between 40 and 75 characters, Exim
6961 left the rest of the message alone. Two changes have been made: (a) I've
6962 reduced the minimum length to 35 characters; (b) if it can't find a break
6963 point between 35 and 75 characters, it looks ahead and uses the first one
6964 that it finds. This may give the occasional overlong line, but at least the
6965 remaining text gets split now.
6967 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6968 file descriptors might be low, and that setting 1000 would always raise it.
6969 It turns out that in some environments, the limit is already over 1000 and
6970 that lowering it causes trouble. So now Exim takes care not to decrease it.
6972 40. When delivering a message, the value of $return_path is set to $sender_
6973 address at the start of routing (routers may change the value). By an
6974 oversight, this default was not being set up when an address was tested by
6975 -bt or -bv, which affected the outcome if any router or filter referred to
6978 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6979 log only when "message" or "log_message" are set. However, if one of the
6980 conditions was an address verification, or a call to a nested ACL, the
6981 messages generated by the underlying test were being passed through. This
6982 no longer happens. The underlying message is available in $acl_verify_
6983 message for both "message" and "log_message" expansions, so it can be
6984 passed through if needed.
6986 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6987 new expansion $bh_ to give the encoded byte string without charset
6988 translation. Translation happens only if iconv() is available; HAVE_ICONV
6989 indicates this at build time. HEADERS_CHARSET gives the charset to
6990 translate to; headers_charset can change it in the configuration, and
6991 "headers charset" can change it in an individual filter file.
6993 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6994 that creates RFC 2047 encoded "words" labels them as that charset instead
6995 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6996 expansion operator; (ii) when Exim creates a From: line for a local
6997 message; (iii) when a header line is rewritten to include a "phrase" part.
6999 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7000 buggy, causing it to skip the first lines of messages whose message ID
7001 ended in 'D'. This would not have bitten before Exim release 4.14, because
7002 message IDs were unlikely to end in 'D' before then. The effect was to have
7003 incorrect size information for certain domains.
7005 45. #include "config.h" was missing at the start of the crypt16.c module. This
7006 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7009 46. If there was a timeout during a "random" callout check, Exim treated it as
7010 a failure of the random address, and carried on sending RSET and the real
7011 address. If the delay was just some slowness somewhere, the response to the
7012 original RCPT would be taken as a response to RSET and so on, causing
7013 mayhem of various kinds.
7015 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7016 when I implemented it. It didn't allow for the fact that some option values
7017 may legitimately be negative (e.g. size_addition), and it didn't even do
7018 the right test for positive values.
7020 48. Domain names in DNS records are case-independent. Exim always looks them up
7021 in lower case. Some resolvers return domain names in exactly the case they
7022 appear in the zone file, that is, they may contain uppercase letters. Not
7023 all resolvers do this - some return always lower case. Exim was treating a
7024 change of case by a resolver as a change of domain, similar to a widening
7025 of a domain abbreviation. This triggered its re-routing code and so it was
7026 trying to route what was effectively the same domain again. This normally
7027 caused routing to fail (because the router wouldn't handle the domain
7028 twice). Now Exim checks for this case specially, and just changes the
7029 casing of the domain that it ultimately uses when it transmits the message
7032 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7035 50. If a filter generated a file delivery with a non-absolute name (possible if
7036 no home directory exists for the router), the forbid_file option was not
7039 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7040 the existing equality matching.
7042 52. Exim was using ints instead of ino_t variables in some places where it was
7043 dealing with inode numbers.
7045 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7046 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7047 called TMPDIR, and if it finds it is different, it changes its value.
7049 54. The smtp_printf() function is now made available to local_scan() so
7050 additional output lines can be written before returning. There is also an
7051 smtp_fflush() function to enable the detection of a dropped connection.
7052 The variables smtp_input and smtp_batched_input are exported to
7055 55. Changed the default runtime configuration: the message "Unknown user"
7056 has been removed from the ACL, and instead placed on the localuser router,
7057 using the cannot_route_message feature. This means that any verification
7058 failures that generate their own messages won't get overridden. Similarly,
7059 the "Unrouteable address" message that was in the ACL for unverifiable
7060 relay addresses has also been removed.
7062 56. Added hosts_avoid_esmtp to the smtp transport.
7064 57. The exicyclog script was not checking for the esoteric option
7065 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7066 will work only if exicyclog is run under the appropriate euid.
7068 58. Following a discussion on the list, the rules by which Exim recognises line
7069 endings on incoming messages have been changed. The -dropcr and drop_cr
7070 options are now no-ops, retained only for backwards compatibility. The
7071 following line terminators are recognized: LF CRLF CR. However, special
7072 processing applies to CR:
7074 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7075 nor a local message in the state where . is a terminator.
7077 (ii) If a bare CR is encountered in a header line, an extra space is added
7078 after the line terminator so as not to end the header. The reasoning
7079 behind this is that bare CRs in header lines are most likely either
7080 to be mistakes, or people trying to play silly games.
7082 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7083 was being incorrectly given as 18 bytes larger than it should have been.
7084 This is a VOB (very old bug).
7086 60. This may never have affected anything current, but just in case it has:
7087 When the local host is found other than at the start of a list of hosts,
7088 the local host, those with the same MX, and any that follow, are discarded.
7089 When the list in question was part of a longer list of hosts, the following
7090 hosts (not currently being processed) were also being discarded. This no
7091 longer happens. I'm not sure if this situation could ever has previously
7094 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7097 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7098 header. This is something that is recommended in a new Internet Draft, and
7099 is something that is documented as being done by Sendmail. There are two
7100 possible values. For messages generated by the autoreply transport, Exim
7103 Auto-Submitted: auto-replied
7105 whereas for all other generated messages (e.g. bounces) it adds
7107 Auto-Submitted: auto-generated
7109 63. The "personal" condition in filters now includes a test for the
7110 Auto-Submitted: header. If it contains the string "auto-" the message it
7111 not considered personal.
7113 64. Added rcpt_include_affixes as a generic transport option.
7115 65. Added queue_only_override (default true).
7117 66. Added the syslog_duplication option.
7119 67. If what should have been the first header line of a message consisted of
7120 a space followed by a colon, Exim was mis-interpreting it as a header line.
7121 It isn't of course - it is syntactically invalid and should therefore be
7122 treated as the start of the message body. The misbehaviour could have
7123 caused a number of strange effects, including loss of data in subsequent
7124 header lines, and spool format errors.
7126 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7127 client host had authenticated. This control can now be exercised by an ACL
7128 for more flexibility.
7130 69. By default, callouts do not happen when testing with -bh. There is now a
7131 variant, -bhc, which does actually run the callout code, including
7132 consulting and updating the callout cache.
7134 70. Added support for saslauthd authentication, courtesy of Alexander
7137 71. If statvfs() failed on the spool or log directories while checking their
7138 size for availability, Exim confusingly gave the error "space shortage".
7139 Furthermore, in debugging mode it crashed with a floating point exception.
7140 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7141 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7142 serious problem, Exim now writes to the main and panic logs when this
7143 happens, with details of the failure. It then refuses to accept the
7144 incoming message, giving the message "spool directory problem" or "log
7145 directory problem" with a 421 code for SMTP messages.
7147 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7148 0, 1, and 2 exist, because some OS complain for execs without them (see
7149 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7150 descriptors. However, the code omitted to check that the open succeeded,
7151 causing mysterious errors if for some reason the permissions on /dev/null
7152 got screwed. Now Exim writes a message to the main and panic logs, and
7153 bombs out if it can't open /dev/null.
7155 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7156 interact so that it is all more flexible. It is supposed to remain
7157 backwards compatible. Also added extra_local_interfaces.
7159 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7160 to bomb out with an assertion failure - to the client this appears as a
7161 connection drop. This problem occurs in the part of the code that was taken
7162 from the Samba project. Fortunately, the assertion is in a very simple
7163 function, so I have fixed this by reproducing the function inline in the
7164 one place where it is called, and arranging for authentication to fail
7165 instead of killing the process with assert().
7167 75. The SPA client code was not working when the server requested OEM rather
7168 than Unicode encoding.
7170 76. Added code to make require_files with a specific uid setting more usable in
7171 the case where statting the file as root fails - usually a non-root-mounted
7172 NFS file system. When this happens and the failure is EACCES, Exim now
7173 forks a subprocess and does the per-uid checking as the relevant uid.
7175 77. Added process_log_path.
7177 78. If log_file_path was not explicitly set, a setting of check_log_space or
7178 check_log_inodes was ignored.
7180 79. If a space check for the spool or log partitions fails, the incident is now
7181 logged. Of course, in the latter case the data may get lost...
7183 80. Added the %p formatting code to string_format() so that it can be used to
7184 print addresses in debug_print(). Adjusted all the address printing in the
7185 debugging in store.c to use %p rather than %d.
7187 81. There was a concern that a line of code in smtp_in.c could overflow a
7188 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7189 initially expressed, the concern was not well-founded, because trailing
7190 spaces are removed early. However, if the trailing spaces were followed by
7191 a NULL, they did not get removed, so the overflow was possible. Two fixes
7194 (a) I re-wrote the offending code in a cleaner fashion.
7195 (b) If an incoming SMTP command contains a NULL character, it is rejected
7198 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7199 runs initgroups(), so that if the Exim user is in any additional groups,
7200 they will be used during message reception.
7206 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob