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.
8 Since Exim version 4.90
9 -----------------------
11 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
12 When redis_servers is set to a list of > 1 element, and the Redis servers
13 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
14 case of MOVED into a DEFER case instead, thus moving the query onto the
15 next server in the list. For a cluster of N elements, all N servers must
16 be defined in redis_servers.
18 GF/02 Catch and remove uninitialized value warning in exiqsumm
19 Check for existence of @ARGV before looking at $ARGV[0]
21 JH/01 Replace the store_release() internal interface with store_newblock(),
22 which internalises the check required to safely use the old one, plus
23 the allocate and data copy operations duplicated in both (!) of the
26 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
27 modifier. This matches the restriction on the commandline.
29 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
30 Previously only the last row was returned.
32 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
33 we assumed that tags in the header were well-formed, and parsed the
34 element content after inspecting only the first char of the tag.
35 Assumptions at that stage could crash the receive process on malformed
38 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
39 While running the DKIM ACL we operate on the Permanent memory pool so that
40 variables created with "set" persist to the DATA ACL. Also (at any time)
41 DNS lookups that fail create cache records using the Permanent pool. But
42 expansions release any allocations made on the current pool - so a dnsdb
43 lookup expansion done in the DKIM ACL releases the memory used for the
44 DNS negative-cache, and bad things result. Solution is to switch to the
45 Main pool for expansions.
46 While we're in that code, add checks on the DNS cache during store_reset,
47 active in the testsuite.
48 Problem spotted, and debugging aided, by Wolfgang Breyha.
50 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
51 When none of the hosts presented to a transport match an already-open
52 connection, close it and proceed with the list. Previously we would
53 queue the message. Spotted by Lena with Yahoo, probably involving
56 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
57 Previously a spurious "250 OK id=" response was appended to the proper
60 JH/08 The "support for" informational output now, which built with Content
61 Scanning support, has a line for the malware scanner interfaces compiled
62 in. Interface can be individually included or not at build time.
64 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
65 by the template makefile "src/EDITME". The "STREAM" support for an older
66 ClamAV interface method is removed.
68 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
69 rows affected is given instead).
71 JH/11 The runtime Berkeley DB library version is now additionally output by
72 "exim -d -bV". Previously only the compile-time version was shown.
74 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
75 SMTP connection. Previously, when one had more receipients than the
76 first, an abortive onward connection was made. Move to full support for
77 multiple onward connections in sequence, handling cutthrough connection
78 for all multi-message initiating connections.
80 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
81 routers. Previously, a multi-recipient message would fail to match the
82 onward-connection opened for the first recipient, and cause its closure.
84 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
85 a timeout on read on a GnuTLS initiating connection, resulting in the
86 initiating connection being dropped. This mattered most when the callout
87 was marked defer_ok. Fix to keep the two timeout-detection methods
90 JH/15 Relax results from ACL control request to enable cutthrough, in
91 unsupported situations, from error to silently (except under debug)
92 ignoring. This covers use with PRDR, frozen messages, queue-only and
95 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
97 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
98 metadata, resulting in a crash in free().
100 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
101 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
102 Broken also in d185889f4, with init system revamp.
104 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
105 Previously we abruptly closed the connection after reading a malware-
106 found indication; now we go on to read the "scan ok" response line,
109 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
110 ACL. Previously, a crash would result.
112 JH/19 Speed up macro lookups during configuration file read, by skipping non-
113 macro text after a replacement (previously it was only once per line) and
114 by skipping builtin macros when searching for an uppercase lead character.
116 JH/20 DANE support moved from Experimental to mainline. The Makefile control
117 for the build is renamed.
119 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
120 was allocated for every new TLS startup, meaning one per message. Fix
121 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
123 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
124 reported the original. Fix to report (as far as possible) the ACL
125 result replacing the original.
127 JH/23 Fix memory leak during multi-message connections using STARTTLS under
128 OpenSSL. Certificate information is loaded for every new TLS startup,
129 and the resources needed to be freed.
131 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
133 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
136 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
137 DATA response info to the (existing) per-recipient response info for
138 the "C=" log element. It can have useful tracking info from the
139 destination system. Patch from Simon Arlott.
141 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
142 length value. Previously this would segfault.
144 HS/02 Support Avast multiline protoocol, this allows passing flags to
145 newer versions of the scanner.
147 JH/28 Ensure that variables possibly set during message acceptance are marked
148 dead before release of memory in the daemon loop. This stops complaints
149 about them when the debug_store option is enabled. Discovered specifically
150 for sender_rate_period, but applies to a whole set of variables.
151 Do the same for the queue-runner and queue-list loops, for variables set
152 from spool message files. Do the same for the SMTP per-message loop, for
153 certain variables indirectly set in ACL operations.
155 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
156 as a multi-recipient message from a mailinglist manager). The coding had
157 an arbitrary cutoff number of characters while checking for more input;
158 enforced by writing a NUL into the buffer. This corrupted long / fast
159 input. The problem was exposed more widely when more pipelineing of SMTP
160 responses was introduced, and one Exim system was feeding another.
161 The symptom is log complaints of SMTP syntax error (NUL chars) on the
162 receiving system, and refused recipients seen by the sending system
163 (propating to people being dropped from mailing lists).
164 Discovered and pinpointed by David Carter.
166 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
167 replaced by the ${authresults } expansion.
169 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
171 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
172 allows proper process termination in container environments.
174 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
175 Previously the "final dot" had a newline after it; ensure it is CR,LF.
177 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
178 and "err_perm", deprecated since 4.83 when the RFC-defined words
179 "temperror" and "permerror" were introduced.
185 JH/01 Rework error string handling in TLS interface so that the caller in
186 more cases is responsible for logging. This permits library-sourced
187 string to be attached to addresses during delivery, and collapses
188 pairs of long lines into single ones.
190 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
191 during configuration. Wildcards are allowed and expanded.
193 JH/02 Rework error string handling in DKIM to pass more info back to callers.
194 This permits better logging.
196 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
197 do not close it down and have the child transport start it up again on
198 the passed-on TCP connection. Instead, proxy the child (and any
199 subsequent ones) for TLS via a unix-domain socket channel. Logging is
200 affected: the continued delivery log lines do not have any DNSSEC, TLS
201 Certificate or OCSP information. TLS cipher information is still logged.
203 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
204 identical IP addresses on different listening ports. Will also affect
207 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
208 add noisy ifdef guards to special-case this sillyness.
209 Patch from Bernd Kuhls.
211 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
212 than 255 are no longer allowed.
214 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
215 Disable the session-cache too, which might reduce our load. Since we
216 currrectly use a new context for every connection, both as server and
217 client, there is no benefit for these.
218 GnuTLS appears to not support tickets server-side by default (we don't
219 call gnutls_session_ticket_enable_server()) but client side is enabled
220 by default on recent versions (3.1.3 +) unless the PFS priority string
223 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
224 <https://reproducible-builds.org/specs/source-date-epoch/>.
226 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
227 the check for any unsuccessful recipients did not notice the limit, and
228 erroneously found still-pending ones.
230 JH/08 Pipeline CHUNKING command and data together, on kernels that support
231 MSG_MORE. Only in-clear (not on TLS connections).
233 JH/09 Avoid using a temporary file during transport using dkim. Unless a
234 transport-filter is involved we can buffer the headers in memory for
235 creating the signature, and read the spool data file once for the
236 signature and again for transmission.
238 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
239 4.77 as the kernel support then wasn't solid, having issues in 64bit
240 mode. Now, it's been long enough. Add support for FreeBSD also.
242 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
243 case where the routing stage had gathered several addresses to send to
244 a host before calling the transport for the first, we previously failed
245 to close down TLS in the old transport process before passing the TCP
246 connection to the new process. The new one sent a STARTTLS command
247 which naturally failed, giving a failed delivery and bloating the retry
248 database. Investigation and fix prototype from Wolfgang Breyha.
250 JH/12 Fix check on SMTP command input synchronisation. Previously there were
251 false-negatives in the check that the sender had not preempted a response
252 or prompt from Exim (running as a server), due to that code's lack of
253 awareness of the SMTP input buffering.
255 PP/04 Add commandline_checks_require_admin option.
256 Exim drops privileges sanely, various checks such as -be aren't a
257 security problem, as long as you trust local users with access to their
258 own account. When invoked by services which pass untrusted data to
259 Exim, this might be an issue. Set this option in main configuration
260 AND make fixes to the calling application, such as using `--` to stop
263 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
264 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
265 responses to those, into a single TLS record each way (this usually means
266 a single packet). As a side issue, smtp_enforce_sync now works on TLS
269 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
270 affects you only if you're dancing at the edge of the param size limits.
271 If you are, and this message makes sense to you, then: raise the
272 configured limit or use OpenSSL 1.1. Nothing we can do for older
275 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
276 cmdline element to get the documented default one. Previously it was
279 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
280 are unsuable for non-message-specific reasons - eg. connection timeout,
281 banner-time rejection.
283 JH/16 Fix logging of delivery remote port, when specified by router, under
286 PP/06 Repair manualroute's ability to take options in any order, even if one
287 is the name of a transport.
290 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
292 JH/17 Change the list-building routines interface to use the expanding-string
293 triplet model, for better allocation and copying behaviour.
295 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
296 Previously it was constructed the first time a possibly-matching string
297 was met in the configuration file input during startup; now it is done
300 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
301 compatible one, to avoid the (poorly documented) possibility of a config
302 file in the working directory redirecting the DB files, possibly correpting
303 some existing file. CVE-2017-10140 assigned for BDB.
305 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
306 cache-hot. Previously, although the result was properly cached, the
307 initial verify call returned a defer.
309 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
310 the main verify for receipient in uncached-mode.
312 JH/22 Retire historical build files to an "unsupported" subdir. These are
313 defined as "ones for which we have no current evidence of testing".
315 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
316 if present. Previously it was ignored.
318 JH/24 Start using specified-initialisers in C structure init coding. This is
319 a C99 feature (it's 2017, so now considered safe).
321 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
322 if was a fixed-sized field and bitmask ops via macros; it is now more
325 PP/07 GitHub PR 56: Apply MariaDB build fix.
326 Patch provided by Jaroslav Škarvada.
328 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
329 during Coverity cleanups [4.87 JH/47]
330 Diagnosis and fix provided by Michael Fischer v. Mollard.
332 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
333 the right size to place the terminating semicolon on its own folded
334 line, the header hash was calculated to an incorrect value thanks to
335 the (relaxed) space the fold became.
337 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
338 and confused the parent.
340 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
341 which could crash as a result. This could lead to undeliverable messages.
343 JH/28 Logging: "next input sent too soon" now shows where input was truncated
346 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
347 matters on fast-turnover and PID-randomising systems, which were getting
348 out-of-order delivery.
350 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
351 a possibly-overlapping copy. The symptom was that "Remote host closed
352 connection in response to HELO" was logged instead of the actual 4xx
355 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
356 Previously only that bufferd was discarded, resulting in SYMTP command
359 JH/32 DKIM: when a message has multiple signatures matching an identity given
360 in dkim_verify_signers, run the dkim acl once for each. Previously only
361 one run was done. Bug 2189.
363 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
364 "panic the current process" to "deliberately defer". The panic log is
365 still written with the problem list name; the mail and reject logs now
366 get a temp-reject line for the message that was being handled, saying
367 something like "domains check lookup or other defer". The SMTP 451
368 message is still "Temporary local problem".
370 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
371 A crafted sequence of BDAT commands could result in in-use memory beeing
372 freed. CVE-2017-16943.
374 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
375 from SMTP input. Previously it was always done; now only done for DATA
376 and not BDAT commands. CVE-2017-16944.
378 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
379 to the message (such as an overlong header line). Previously this was
380 not done and we did not exit BDAT mode. Followon from the previous item
381 though a different problem.
387 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
388 than -2003 did; needs libidn2 in addition to libidn.
390 JH/02 The path option on a pipe transport is now expanded before use.
392 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
393 Patch provided by "Björn", documentation fix added too.
395 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
396 missing a wire-to-host endian conversion.
398 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
399 close after a BDAT command line could be taken as a following command,
400 giving a synch failure. Fix by only checking for synch immediately
401 before acknowledging the chunk.
403 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
404 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
405 macro. Patches provided by Josh Soref.
407 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
408 Previously we did not; the RFC seems ambiguous and VRFY is not listed
409 by IANA as a service extension. However, John Klensin suggests that we
412 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
413 the dkim code may be unix-mode line endings rather than smtp wire-format
414 CRLF, so prepend a CR to any bare LF.
416 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
417 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
419 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
420 the first were themselves being wrongly included in the feed into dkim
421 processing; with most chunk sizes in use this resulted in an incorrect
422 body hash calculated value.
424 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
425 DKIM signature block, for verification. Although advised against by
426 standards it is specifically not ruled illegal.
428 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
430 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
431 missing a body hash (the bh= tag).
433 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
434 It seems that HAProxy sends the Proxy Protocol information in clear and
435 only then does a TLS startup, so do the same.
437 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
438 TCP connections (such as for Spamd) unless the daemon successfully set
439 Fast Open mode on its listening sockets. This fixes breakage seen on
440 too-old kernels or those not configured for Fast Open, at the cost of
441 requiring both directions being enabled for TFO, and TFO never being used
442 by non-daemon-related Exim processes.
444 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
445 endings, at least on the first header line. Try to canonify any that get
446 past that check, despite the cost.
448 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
449 now limited to an arbitrary five deep, while parsing addresses with the
450 strip_excess_angle_brackets option enabled.
452 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
453 instead leave the unprompted TLS handshake in socket buffer for the
454 TLS library to consume.
456 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
458 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
460 JH/16 Drop variables when they go out of scope. Memory management drops a whole
461 region in one operation, for speed, and this leaves assigned pointers
462 dangling. Add checks run only under the testsuite which checks all
463 variables at a store-reset and panics on a dangling pointer; add code
464 explicitly nulling out all the variables discovered. Fixes one known
465 bug: a transport crash, where a dangling pointer for $sending_ip_address
466 originally assigned in a verify callout, is re-used.
468 PP/06 Drop '.' from @INC in various Perl scripts.
470 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
472 PP/08 Reduce a number of compilation warnings under clang; building with
473 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
474 should be warning-free.
476 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
478 HS/01 Fix portability problems introduced by PP/08 for platforms where
479 realloc(NULL) is not equivalent to malloc() [SunOS et al].
481 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
482 chunk. This allows us to accept broken chunked messages. We need a more
483 general solution here.
485 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
486 already-broken messages in the queue.
488 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
490 JH/19 Fix reference counting bug in routing-generated-address tracking.
496 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
497 supports it and a size is available (ie. the sending peer gave us one).
499 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
500 years of being deprecated). The replacements are the ACLs
501 acl_smtp_mime and acl_not_smtp_mime.
503 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
504 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
505 or even an in-clear connection were permitted. Now, if the host lookup
506 was dnssec and dane was requested then the host is only used if the
507 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
508 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
509 if one fails this test.
510 This means that a poorly-configured remote DNS will make it incommunicado;
511 but it protects against a DNS-interception attack on it.
513 JH/04 Bug 1810: make continued-use of an open smtp transport connection
514 non-noisy when a race steals the message being considered.
516 JH/05 If main configuration option tls_certificate is unset, generate a
517 self-signed certificate for inbound TLS connections.
519 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
520 in rewrites and routers.
522 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
523 and logged a warning sing 4.83; now they are a configuration file error.
525 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
526 (lacking @domain). Apply the same qualification processing as RCPT.
528 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
530 JH/10 Support ${sha256:} applied to a string (as well as the previous
533 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
534 a cutthrough deliver is pending, as we always want to make a connection.
535 This also avoids re-routing the message when later placing the cutthrough
536 connection after a verify cache hit.
537 Do not update it with the verify result either.
539 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
540 when routing results in more than one destination address.
542 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
543 signing (which inhibits the cutthrough capability). Previously only
544 the presence of an option was tested; now an expansion evaluating as
545 empty is permissible (obviously it should depend only on data available
546 when the cutthrough connection is made).
548 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
549 the relevant preceding SMTP command did not note the pipelining mode.
551 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
552 Previously they were not counted.
554 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
555 as one having no matching records. Previously we deferred the message
556 that needed the lookup.
558 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
559 distinguished as "(=".
561 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
562 for missing MX records. Previously it only worked for missing A records.
564 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
566 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
567 after the data-go-ahead and data-ack. Patch from Jason Betts.
569 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
570 even for a "none" policy. Patch from Tony Meyer.
572 JH/22 Fix continued use of a connection for further deliveries. If a port was
573 specified by a router, it must also match for the delivery to be
576 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
577 When one of the recipients of a message was unsuitable for the connection
578 (has no matching addresses), we lost track of needing to mark it
579 deferred. As a result mail would be lost.
581 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
583 JH/25 Decoding ACL controls is now done using a binary search; the source code
584 takes up less space and should be simpler to maintain. Merge the ACL
585 condition decode tables also, with similar effect.
587 JH/26 Fix problem with one_time used on a redirect router which returned the
588 parent address unchanged. A retry would see the parent address marked as
589 delivered, so not attempt the (identical) child. As a result mail would
592 JH/27 Fix a possible security hole, wherein a process operating with the Exim
593 UID can gain a root shell. Credit to http://www.halfdog.net/ for
594 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
597 JH/28 Enable {spool,log} filesystem space and inode checks as default.
598 Main config options check_{log,spool}_{inodes,space} are now
599 100 inodes, 10MB unless set otherwise in the configuration.
601 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
602 Previously it only applied to the main-section connection policy
605 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
607 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
608 by me. Added RFC7919 DH primes as an alternative.
610 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
611 are not in the system include path.
613 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
614 GnuTLS, when a session startup failed (eg because the client disconnected)
615 Exim did stdio operations after fclose. This was exposed by a recent
616 change which nulled out the file handle after the fclose.
618 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
619 signed directly by the cert-signing cert, rather than an intermediate
620 OCSP-signing cert. This is the model used by LetsEncrypt.
622 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
624 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
625 an incoming connection.
627 HS/02 Bug 1802: Do not half-close the connection after sending a request
630 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
631 fallback to "prime256v1".
633 JH/34 SECURITY: Use proper copy of DATA command in error message.
634 Could leak key material. Remotely exploitable. CVE-2016-9963.
640 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
641 and 3.4.4 - once the server is enabled to respond to an OCSP request
642 it does even when not requested, resulting in a stapling non-aware
643 client dropping the TLS connection.
645 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
646 support variable-length bit vectors. No functional change.
648 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
649 The I= interface field on outgoing lines is now after the H= remote
650 host field, same as incoming lines. There is a separate
651 outgoing_interface log selector which allows you to disable the
654 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
655 If not running log_selector +smtp_connection the mainlog would be held
656 open indefinitely after a "too many connections" event, including to a
657 deleted file after a log rotate. Leave the per net connection logging
658 leaving it open for efficiency as that will be quickly detected by the
659 check on the next write.
661 HS/01 Bug 1671: Fix post transport crash.
662 Processing the wait-<transport> messages could crash the delivery
663 process if the message IDs didn't exist for some reason. When
664 using 'split_spool_directory=yes' the construction of the spool
665 file name failed already, exposing the same netto behaviour.
667 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
668 mime_regex ACL conditions.
670 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
671 to DSN fail messages (bounces): remote IP, remote greeting, remote response
672 to HELO, local diagnostic string.
674 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
675 log line to debug. Even when configured with a tls authenticator many
676 client connections are expected to not authenticate in this way, so
677 an authenticate fail is not an error.
679 HS/02 Add the Exim version string to the process info. This way exiwhat
680 gives some more detail about the running daemon.
682 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
683 matter for fast-change records such as DNSBLs.
685 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
686 retry record, even if constant. There may be multiple transports with
687 different interface settings and the retry behaviour needs to be kept
690 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
692 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
694 JH/10 Bug 840: fix log_defer_output option of pipe transport
696 JH/11 Bug 830: use same host for all RCPTS of a message, even under
697 hosts_randomize. This matters a lot when combined with mua_wrapper.
699 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
700 ${quote_pgsql:<string>} operator.
702 JH/13 Bug 1708: avoid misaligned access in cached lookup.
704 JH/14 Change header file name for freeradius-client. Relevant if compiling
705 with Radius support; from the Gentoo tree and checked under Fedora.
707 JH/15 Bug 1712: Introduce $prdr_requested flag variable
709 JH/16 Bug 1714: Permit an empty string as expansion result for transport
710 option transport_filter, meaning no filtering.
712 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
714 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
715 defaults to "*" (all hosts). The variable is now available when not built
716 with TLS, default unset, mainly to enable keeping the testsuite sane.
717 If a server certificate is not supplied (via tls_certificate) an error is
718 logged, and clients will find TLS connections fail on startup. Presumably
719 they will retry in-clear.
720 Packagers of Exim are strongly encouraged to create a server certificate
721 at installation time.
723 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
724 with the $config_file variable.
726 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
727 in transport context, after the attempt, and per-recipient. The latter type
728 is per host attempted. The event data is the error message, and the errno
729 information encodes the lookup type (A vs. MX) used for the (first) host,
730 and the trailing two digits of the smtp 4xx response.
732 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
733 to write to mainlog (or rejectlog, paniclog) in the window between file
734 creation and permissions/ownership being changed. Particularly affects
735 installations where exicyclog is run as root, rather than exim user;
736 result is that the running daemon panics and dies.
738 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
740 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
741 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
742 "pri" and "weight". Note that the previous implicit priority given by the
743 list order is no longer honoured.
745 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
748 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
749 by defining SUPPORT_SOCKS.
751 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
752 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
753 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
754 variables are renamed to proxy_{local,external}_{address,port}.
756 JH/27 Move Internationalisation support from Experimental to mainline, enabled
757 for a build by defining SUPPORT_I18N
759 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
760 of the query string, and make ${quote_redis:} do that quoting.
762 JH/29 Move Events support from Experimental to mainline, enabled by default
763 and removable for a build by defining DISABLE_EVENT.
765 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
767 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
768 cached by the daemon.
770 JH/32 Move Redis support from Experimental to mainline, enabled for a build
771 by defining LOOKUP_REDIS. The libhiredis library is required.
773 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
774 keys are given for lookup.
776 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
777 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
778 only supported when built with TLS support. The PolarSSL SHA routines
779 are still used when the TLS library is too old for convenient support.
781 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
782 openssl_options), for security. OpenSSL forces this from version 1.1.0
783 server-side so match that on older versions.
785 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
786 allocation for $value could be released as the expansion processing
787 concluded, but leaving the global pointer active for it.
789 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
790 and to use the domains and local_parts ACL conditions.
792 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
793 incorrectly not doubled on cutthrough transmission, hence seen as a
794 body-termination at the receiving system - resulting in truncated mails.
795 Commonly the sender saw a TCP-level error, and retransmitted the message
796 via the normal store-and-forward channel. This could result in duplicates
797 received - but deduplicating mailstores were liable to retain only the
798 initial truncated version.
800 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
802 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
804 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
805 we're in there, support oversigning also; bug 1309.
807 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
809 HS/04 Add support for keep_environment and add_environment options.
811 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
812 either intentional arithmetic overflow during PRNG, or testing config-
815 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
816 delivery resulted in actual delivery. Cancel cutthrough before DATA
819 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
820 rejects a recipient: pass the reject to the originator.
822 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
823 Many were false-positives and ignorable, but it's worth fixing the
826 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
827 for the new environment-manipulation done at startup. Move the routines
828 from being local to tls.c to being global via the os.c file.
830 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
831 an extract embedded as result-arg for a map, the first arg for extract
832 is unavailable so we cannot tell if this is a numbered or keyed
833 extraction. Accept either.
839 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
842 JH/02 The smtp transport option "multi_domain" is now expanded.
844 JH/03 The smtp transport now requests PRDR by default, if the server offers
847 JH/04 Certificate name checking on server certificates, when exim is a client,
848 is now done by default. The transport option tls_verify_cert_hostnames
849 can be used to disable this per-host. The build option
850 EXPERIMENTAL_CERTNAMES is withdrawn.
852 JH/05 The value of the tls_verify_certificates smtp transport and main options
853 default to the word "system" to access the system default CA bundle.
854 For GnuTLS, only version 3.0.20 or later.
856 JH/06 Verification of the server certificate for a TLS connection is now tried
857 (but not required) by default. The verification status is now logged by
858 default, for both outbound TLS and client-certificate supplying inbound
861 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
864 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
865 Status Notification (bounce) messages are now MIME format per RFC 3464.
866 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
867 under the control of the dsn_advertise_hosts option, and routers may
868 have a dsn_lasthop option.
870 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
871 default, modifiable by a malware= option. The list separator for
872 the options can now be changed in the usual way. Bug 68.
874 JH/10 The smtp_receive_timeout main option is now expanded before use.
876 JH/11 The incoming_interface log option now also enables logging of the
877 local interface on delivery outgoing connections.
879 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
880 if the interface and destination host and port all match.
882 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
885 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
886 Patch from Andrew Lewis.
888 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
889 now supports optional time-restrictions, weighting, and priority
890 modifiers per server. Patch originally by <rommer@active.by>.
892 JH/16 The spamd_address main option now supports a mixed list of local
893 and remote servers. Remote servers can be IPv6 addresses, and
894 specify a port-range.
896 JH/17 Bug 68: The spamd_address main option now supports an optional
897 timeout value per server.
899 JH/18 Bug 1581: Router and transport options headers_add/remove can
900 now have the list separator specified.
902 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
905 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
908 JH/21 Support for the A6 type of dns record is withdrawn.
910 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
911 rather than the verbs used.
913 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
914 from 255 to 1024 chars.
916 JH/24 Verification callouts now attempt to use TLS by default.
918 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
919 are generic router options now. The defaults didn't change.
921 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
922 Original patch from Alexander Shikoff, worked over by JH.
924 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
925 files if ZCAT_COMMAND is not executable.
927 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
929 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
931 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
932 Normally benign, it bites when the pair was led to by a CNAME;
933 modern usage is to not canonicalize the domain to a CNAME target
934 (and we were inconsistent anyway for A-only vs AAAA+A).
936 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
938 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
939 when evaluating $sender_host_dnssec.
941 JH/31 Check the HELO verification lookup for DNSSEC, adding new
942 $sender_helo_dnssec variable.
944 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
946 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
948 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
950 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
951 documented as working, but never had. Support all but $spam_report.
953 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
954 added for tls authenticator.
956 HS/03 Add perl_taintmode main config option
962 TL/01 When running the test suite, the README says that variables such as
963 no_msglog_check are global and can be placed anywhere in a specific
964 test's script, however it was observed that placement needed to be near
965 the beginning for it to behave that way. Changed the runtest perl
966 script to read through the entire script once to detect and set these
967 variables, reset to the beginning of the script, and then run through
968 the script parsing/test process like normal.
970 TL/02 The BSD's have an arc4random API. One of the functions to induce
971 adding randomness was arc4random_stir(), but it has been removed in
972 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
973 function when detected.
975 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
976 cause callback expansion.
978 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
979 syntax errors in an expansion can be treated as a string instead of
980 logging or causing an error, due to the internal use of bool_lax
981 instead of bool when processing it.
983 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
984 server certificates when making smtp deliveries.
986 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
988 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
990 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
992 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
993 Merged patch from Sebastian Wiedenroth.
995 JH/05 Fix results-pipe from transport process. Several recipients, combined
996 with certificate use, exposed issues where response data items split
997 over buffer boundaries were not parsed properly. This eventually
998 resulted in duplicates being sent. This issue only became common enough
999 to notice due to the introduction of connection certificate information,
1000 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1002 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1003 size buffer was used, resulting in syntax errors when an expansion
1006 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1007 version 3.3.6 or later.
1009 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1010 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1011 both become "event_action", the variables become $event_name, $event_data
1012 and $event_defer_errno. There is a new variable $verify_mode, usable in
1013 routers, transports and related events. The tls:cert event is now also
1014 raised for inbound connections, if the main configuration event_action
1017 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1018 early OCSP support, but no stapling (appears to be less than 1.0.0).
1020 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1021 server certificate names available under the smtp transport option
1022 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1025 JH/10 Time-related extraction expansions from certificates now use the main
1026 option "timezone" setting for output formatting, and are consistent
1027 between OpenSSL and GnuTLS compilations. Bug 1541.
1029 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1030 encoded parameter in the incoming message. Bug 1558.
1032 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1033 include certificate info, eximon was claiming there were spoolfile
1036 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1038 JH/14 Log delivery-related information more consistently, using the sequence
1039 "H=<name> [<ip>]" wherever possible.
1041 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1042 are problematic for Debian distribution, omit them from the release
1045 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1047 JH/16 Fix string representation of time values on 64bit time_t architectures.
1050 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1051 output list separator was used.
1056 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1057 checkers that were complaining about end of non-void function with no
1060 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1061 This was a regression introduced in 4.83 by another bugfix.
1063 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1065 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1066 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1072 TF/01 Correctly close the server side of TLS when forking for delivery.
1074 When a message was received over SMTP with TLS, Exim failed to clear up
1075 the incoming connection properly after forking off the child process to
1076 deliver the message. In some situations the subsequent outgoing
1077 delivery connection happened to have the same fd number as the incoming
1078 connection previously had. Exim would try to use TLS and fail, logging
1079 a "Bad file descriptor" error.
1081 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1082 utilities have not been installed.
1084 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1085 temporary space as the ACL may create new global variables.
1087 TL/01 LDAP support uses per connection or global context settings, depending
1088 upon the detected version of the libraries at build time.
1090 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1091 to extract and use the src ip:port in logging and expansions as if it
1092 were a direct connection from the outside internet. PPv2 support was
1093 updated based on HAProxy spec change in May 2014.
1095 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1097 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1098 Properly escape header and check for NULL return.
1100 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1103 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1105 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1106 characters in header names, implemented as a verify condition.
1107 Contributed by Michael Fischer v. Mollard.
1109 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1110 results permerror and temperror. Previous values are deprecated but
1111 still accepted. In a future release, err_perm and err_temp will be
1112 completely removed, which will be a backward incompatibility if the
1113 ACL tests for either of these two old results. Patch contributed by
1114 user bes-internal on the mailing list.
1116 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1118 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1119 selectors, in both main and reject logs.
1121 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1124 JH/07 Add malware type "sock" for talking to simple daemon.
1126 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1128 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1129 routers/transports under cutthrough routing.
1131 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1132 numbers. Touch up "bool" conditional to keep the same definition.
1134 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1136 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1138 JH/12 Expand items in router/transport headers_add or headers_remove lists
1139 individually rather than the list as a whole. Bug 1452.
1141 Required for reasonable handling of multiple headers_ options when
1142 they may be empty; requires that headers_remove items with embedded
1143 colons must have them doubled (or the list-separator changed).
1145 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1146 view the policy declared in the DMARC record. Currently, $dmarc_status
1147 is a combined value of both the record presence and the result of the
1150 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1152 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1153 dnslookup router and the smtp transport (applying to the forward
1156 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1157 of ldap servers used for a specific lookup. Patch provided by Heiko
1160 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1161 New variable $lookup_dnssec_authenticated for observability.
1163 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1164 Patch submitted by Lars Timman.
1166 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1168 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1169 Requires trusted mode and valid format message id, aborts otherwise.
1170 Patch contributed by Heiko Schlichting.
1172 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1173 certextract with support for various fields. Bug 1358.
1175 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1176 is requested by default, modifiable by smtp transport option
1179 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1180 operate on certificate variables to give certificate fingerprints
1181 Also new ${sha256:cert_variable}.
1183 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1185 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1186 Christian Aistleitner.
1188 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1190 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1191 file. Patch from Wolfgang Breyha.
1193 JH/25 Expand the coverage of the delivery $host and $host_address to
1194 client authenticators run in verify callout. Bug 1476.
1196 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1197 align with daemon_smtp_ports. Bug 72.
1199 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1200 support and error reporting did not work properly.
1202 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1203 and is readable. Patch from Andrew Colin Kissa.
1205 TL/14 Enhance documentation of ${run expansion and how it parses the
1206 commandline after expansion, particularly in the case when an
1207 unquoted variable expansion results in an empty value.
1209 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1211 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1212 by renaming away from it. Addresses GH issue 15, reported by
1215 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1217 TL/15 SECURITY: prevent double expansion in math comparison functions
1218 (can expand unsanitized data). Not remotely exploitable.
1225 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1227 PP/02 Make -n do something, by making it not do something.
1228 When combined with -bP, the name of an option is not output.
1230 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1233 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1234 $sender_host_name and config options to manage this, and basic check
1237 PP/05 DSCP support for outbound connections and control modifier for inbound.
1239 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1240 (Only plugin which currently uses this is kerberos4, which nobody should
1241 be using, but we should make it available and other future plugins might
1242 conceivably use it, even though it would break NAT; stuff *should* be
1243 using channel bindings instead).
1245 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1246 name; added for Sendmail compatibility; requires admin caller.
1247 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1248 just ignore it); requires trusted caller.
1249 Also parse but ignore: -Ac -Am -X<logfile>
1252 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1254 TL/02 Add +smtp_confirmation as a default logging option.
1256 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1257 Patch by Magnus Holmgren from 2007-02-20.
1259 TL/04 Bugzilla 1281 - Spec typo.
1260 Bugzilla 1283 - Spec typo.
1261 Bugzilla 1290 - Spec grammar fixes.
1263 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1265 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1267 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1268 mailing list by by Dmitry Isaikin.
1270 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1272 JH/02 Support "G" suffix to numbers in ${if comparisons.
1274 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1276 NM/01 Bugzilla 1197 - Spec typo
1277 Bugzilla 1196 - Spec examples corrections
1279 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1281 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1282 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1285 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1286 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1288 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1289 "acl {{name}{arg}...}", and optional args on acl condition
1292 JH/05 Permit multiple router/transport headers_add/remove lines.
1294 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1296 JH/07 Avoid using a waiting database for a single-message-only transport.
1297 Performance patch from Paul Fisher. Bugzilla 1262.
1299 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1302 JH/09 Add $headers_added variable, with content from use of ACL modifier
1303 add_header (but not yet added to the message). Bugzilla 199.
1305 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1306 Pulled from Bugzilla 817 by Wolfgang Breyha.
1308 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1310 (nb: this is the same fix as in Exim 4.80.1)
1312 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1315 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1318 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1320 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1321 advertise SMTP AUTH mechanism to us, instead of a generic
1322 protocol violation error. Also, make Exim more robust to bad
1323 data from the Dovecot auth socket.
1325 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1327 When a queue runner is handling a message, Exim first routes the
1328 recipient addresses, during which it prunes them based on the retry
1329 hints database. After that it attempts to deliver the message to
1330 any remaining recipients. It then updates the hints database using
1333 So if a recipient address works intermittently, it can get repeatedly
1334 deferred at routing time. The retry hints record remains fresh so the
1335 address never reaches the final cutoff time.
1337 This is a fairly common occurrence when a user is bumping up against
1338 their storage quota. Exim had some logic in its local delivery code
1339 to deal with this. However it did not apply to per-recipient defers
1340 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1342 This change adds a proper retry rule check during routing so that the
1343 final cutoff time is checked against the message's age. We only do
1344 this check if there is an address retry record and there is not a
1345 domain retry record; this implies that previous attempts to handle
1346 the address had the retry_use_local_parts option turned on. We use
1347 this as an approximation for the destination being like a local
1348 delivery, as in LMTP.
1350 I suspect this new check makes the old local delivery cutoff check
1351 redundant, but I have not verified this so I left the code in place.
1353 TF/02 Correct gecos expansion when From: is a prefix of the username.
1355 Test 0254 submits a message to Exim with the header
1359 When I ran the test suite under the user fanf2, Exim expanded
1360 the header to contain my full name, whereas it should have added
1361 a Resent-Sender: header. It erroneously treats any prefix of the
1362 username as equal to the username.
1364 This change corrects that bug.
1366 GF/01 DCC debug and logging tidyup
1367 Error conditions log to paniclog rather than rejectlog.
1368 Debug lines prefixed by "DCC: " to remove any ambiguity.
1370 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1372 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1373 Bug spotted by Jeremy Harris; was flawed since initial commit.
1374 Would have resulted in OCSP responses post-SNI triggering an Exim
1375 NULL dereference and crash.
1377 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1379 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1380 Bug detection, analysis and fix by Samuel Thibault.
1381 Bugzilla 1331, Debian bug #698092.
1383 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1385 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1386 Server implementation by Todd Lyons, client by JH.
1387 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1388 config variable "prdr_enable" controls whether the server
1389 advertises the facility. If the client requests PRDR a new
1390 acl_data_smtp_prdr ACL is called once for each recipient, after
1391 the body content is received and before the acl_smtp_data ACL.
1392 The client is controlled by both of: a hosts_try_prdr option
1393 on the smtp transport, and the server advertisement.
1394 Default client logging of deliveries and rejections involving
1395 PRDR are flagged with the string "PRDR".
1397 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1398 fclose(). Diagnosis by Todd Lyons.
1400 PP/17 Update configure.default to handle IPv6 localhost better.
1401 Patch by Alain Williams (plus minor tweaks).
1404 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1405 This is now consistent with GnuTLS, and is now documented: the
1406 previous undocumented portable approach to treating the option as
1407 unset was to force an expansion failure. That still works, and
1408 an empty string is now equivalent.
1410 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1411 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1412 not performing validation itself.
1414 PP/20 Added force_command boolean option to pipe transport.
1415 Patch from Nick Koston, of cPanel Inc.
1417 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1420 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1422 PP/21 Fix eximon continuous updating with timestamped log-files.
1423 Broken in a format-string cleanup in 4.80, missed when I repaired the
1424 other false fix of the same issue.
1425 Report and fix from Heiko Schlichting.
1428 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1429 Report from Prashanth Katuri.
1431 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1432 It's SecureTransport, so affects any MacOS clients which use the
1433 system-integrated TLS libraries, including email clients.
1435 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1436 using a MIME ACL for non-SMTP local injection.
1437 Report and assistance in diagnosis by Warren Baker.
1439 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1441 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1443 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1444 last id that failed so it may be referenced in subsequent ACL's.
1446 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1449 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1450 ldap library initialization, allowing self-signed CA's to be
1451 used. Also properly sets require_cert option later in code by
1452 using NULL (global ldap config) instead of ldap handle (per
1453 session). Bug diagnosis and testing by alxgomz.
1455 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1456 the src/util/ subdirectory.
1458 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1459 renamed to Transport Post Delivery Action by Jeremy Harris, as
1462 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1463 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1464 redis_servers = needs to be configured which will be used by the redis
1465 lookup. Patch from Warren Baker, of The Packet Hub.
1467 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1469 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1470 hostname or reverse DNS when processing a host list. Used suggestions
1471 from multiple comments on this bug.
1473 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1475 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1476 Missed a few lines, added it to make the runtest require no keyboard
1479 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1480 contains upper case chars. Make router use caseful_local_part.
1482 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1483 support when GnuTLS has been built with p11-kit.
1489 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1491 This, or similar/improved, will also be change PP/11 of 4.82.
1497 PP/01 Handle short writes when writing local log-files.
1498 In practice, only affects FreeBSD (8 onwards).
1499 Bugzilla 1053, with thanks to Dmitry Isaikin.
1501 NM/01 Bugzilla 949 - Documentation tweak
1503 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1506 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1508 PP/02 Implemented gsasl authenticator.
1510 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1512 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1513 `pkg-config foo` for cflags/libs.
1515 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1516 with rest of GSASL and with heimdal_gssapi.
1518 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1519 `pkg-config foo` for cflags/libs for the TLS implementation.
1521 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1522 properties get this fed in as external SSF. A number of robustness
1523 and debugging improvements to the cyrus_sasl authenticator.
1525 PP/08 cyrus_sasl server now expands the server_realm option.
1527 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1528 Patch by Jeremy Harris.
1530 PP/10 Added dbmjz lookup type.
1532 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1534 PP/12 MAIL args handles TAB as well as SP, for better interop with
1535 non-compliant senders.
1536 Analysis and variant patch by Todd Lyons.
1538 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1539 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1540 Patch from Dirk Mueller <dmueller@suse.com>
1542 PP/13 tls_peerdn now print-escaped for spool files.
1543 Observed some $tls_peerdn in wild which contained \n, which resulted
1544 in spool file corruption.
1546 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1547 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1548 or write after TLS renegotiation, which otherwise led to messages
1551 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1552 as a tracking header (ie: a signed header comes before the signature).
1553 Patch from Wolfgang Breyha.
1555 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1556 comma-sep list; embedded commas doubled.
1558 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1560 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1562 Report and patch from Dmitry Banschikov.
1564 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1565 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1566 failures. We appear to now support TLS1.1+ with Exim.
1568 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1569 lets Exim select keys and certificates based upon TLS SNI from client.
1570 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1571 before an outbound SMTP session. New log_selector, +tls_sni.
1573 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1574 NULL dereference. Report and patch from Alun Jones.
1576 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1577 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1578 Not seeing resolver debug output on NetBSD, but suspect this is a
1579 resolver implementation change.
1581 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1582 Left warnings. Added "eximon gdb" invocation mode.
1584 PP/21 Defaulting "accept_8bitmime" to true, not false.
1586 PP/22 Added -bw for inetd wait mode support.
1588 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1589 locate the relevant includes and libraries. Made this the default.
1591 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1592 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1594 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1595 This may cause build issues on older platforms.
1597 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1598 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1599 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1600 Added SNI support via GnuTLS too.
1601 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1603 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1605 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1606 Applied second patch from Janne, implementing suggestion to default
1607 multiple-strings-in-record handling to match SPF spec.
1609 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1611 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1612 read-only, out of scope).
1613 Patch from Wolfgang Breyha, report from Stuart Northfield.
1615 PP/29 Fix three issues highlighted by clang analyser static analysis.
1616 Only crash-plausible issue would require the Cambridge-specific
1617 iplookup router and a misconfiguration.
1618 Report from Marcin Mirosław.
1620 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1622 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1623 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1624 As part of this, removing so much warning spew let me fix some minor
1625 real issues in debug logging.
1627 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1628 assignment on my part. Fixed.
1630 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1631 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1632 Janne Snabb (who went above and beyond: thank you).
1634 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1635 string otherwise requires a connection and a bunch more work and it's
1636 relatively easy to get wrong. Should also expose TLS library linkage
1639 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1640 64-bit ${eval} (JH/03).
1642 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1643 GNU libc to support some of the 64-bit stuff, should not lead to
1644 conflicts. Defined before os.h is pulled in, so if a given platform
1645 needs to override this, it can.
1647 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1648 protection layer was required, which is not implemented.
1649 Bugzilla 1254, patch from Wolfgang Breyha.
1651 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1652 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1653 tls_dhparam take prime identifiers. Also unbreak combination of
1654 OpenSSL+DH_params+TLSSNI.
1656 PP/39 Disable SSLv2 by default in OpenSSL support.
1662 PP/01 Solaris build fix for Oracle's LDAP libraries.
1663 Bugzilla 1109, patch from Stephen Usher.
1665 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1667 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1670 TF/02 Fix a couple more cases where we did not log the error message
1671 when unlink() failed. See also change 4.74-TF/03.
1673 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1674 lock up or crash if it happened to be inside a call to libc when it
1675 got a SIGUSR1 from exiwhat.
1677 The SIGUSR1 handler appends the current process status to the process
1678 log which is later printed by exiwhat. It used to use the general
1679 purpose logging code to do this, but several functions it calls are
1680 not safe for signals.
1682 The new output code in the SIGUSR1 handler is specific to the process
1683 log, and simple enough that it's easy to inspect for signal safety.
1684 Removing some special cases also simplifies the general logging code.
1685 Removing the spurious timestamps from the process log simplifies
1688 TF/04 Improved ratelimit ACL condition.
1690 The /noupdate option has been deprecated in favour of /readonly which
1691 has clearer semantics. The /leaky, /strict, and /readonly update modes
1692 are mutually exclusive. The update mode is no longer included in the
1693 database key; it just determines when the database is updated. (This
1694 means that when you upgrade Exim will forget old rate measurements.)
1696 Exim now checks that the per_* options are used with an update mode that
1697 makes sense for the current ACL. For example, when Exim is processing a
1698 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1699 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1700 must specify per_mail/readonly. If you omit the update mode it defaults to
1701 /leaky where that makes sense (as before) or /readonly where required.
1703 The /noupdate option is now undocumented but still supported for
1704 backwards compatibility. It is equivalent to /readonly except that in
1705 ACLs where /readonly is required you may specify /leaky/noupdate or
1706 /strict/noupdate which are treated the same as /readonly.
1708 A useful new feature is the /count= option. This is a generalization
1709 of the per_byte option, so that you can measure the throughput of other
1710 aggregate values. For example, the per_byte option is now equivalent
1711 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1713 The per_rcpt option has been generalized using the /count= mechanism
1714 (though it's more complicated than the per_byte equivalence). When it is
1715 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1716 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1717 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1718 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1719 Note that using per_rcpt with a non-readonly update mode in more than
1720 one ACL will cause the recipients to be double-counted. (The per_mail
1721 and per_byte options don't have this problem.)
1723 The handling of very low rates has changed slightly. If the computed rate
1724 is less than the event's count (usually one) then this event is the first
1725 after a long gap. In this case the rate is set to the same as this event's
1726 count, so that the first message of a spam run is counted properly.
1728 The major new feature is a mechanism for counting the rate of unique
1729 events. The new per_addr option counts the number of different
1730 recipients that someone has sent messages to in the last time period. It
1731 behaves like per_rcpt if all the recipient addresses are different, but
1732 duplicate recipient addresses do not increase the measured rate. Like
1733 the /count= option this is a general mechanism, so the per_addr option
1734 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1735 example, measure the rate that a client uses different sender addresses
1736 with the options per_mail/unique=$sender_address. There are further
1737 details in the main documentation.
1739 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1741 TF/06 Removed a few PCRE remnants.
1743 TF/07 Automatically extract Exim's version number from tags in the git
1744 repository when doing development or release builds.
1746 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1747 Bugzilla 879. Patch from Paul Fisher.
1749 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1750 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1753 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1755 PP/05 Variable $av_failed, true if the AV scanner deferred.
1756 Bugzilla 1078. Patch from John Horne.
1758 PP/06 Stop make process more reliably on build failure.
1759 Bugzilla 1087. Patch from Heiko Schlittermann.
1761 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1762 Bugzilla 1089. Patch from Heiko Schlittermann.
1764 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1765 Bugzilla 1131. Patch from Holger Weiß.
1767 PP/09 Handle IPv6 addresses with SPF.
1768 Bugzilla 860. Patch from Wolfgang Breyha.
1770 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1772 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1775 PP/11 match_* no longer expand right-hand-side by default.
1776 New compile-time build option, EXPAND_LISTMATCH_RHS.
1777 New expansion conditions, "inlist", "inlisti".
1779 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1781 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1783 PP/14 fix log_write() format string regression from TF/03.
1784 Bugzilla 1152. Patch from Dmitry Isaikin.
1790 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1792 PP/02 Harmonised TLS library version reporting; only show if debugging.
1793 Layout now matches that introduced for other libraries in 4.74 PP/03.
1795 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1797 PP/04 New "dns_use_edns0" global option.
1799 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1802 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1803 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1805 TK/01 Updated PolarSSL code to 0.14.2.
1806 Bugzilla 1097. Patch from Andreas Metzler.
1808 PP/07 Catch divide-by-zero in ${eval:...}.
1809 Fixes bugzilla 1102.
1811 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1814 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1815 format-string attack -- SECURITY: remote arbitrary code execution.
1817 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1818 time unintentionally subject to list matching rules, letting the header
1819 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1820 arbitrary string expansion). This allowed for information disclosure.
1822 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1823 INT_MIN/-1 -- value coerced to INT_MAX.
1829 NM/01 Workaround for PCRE version dependency in version reporting
1832 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1833 This fixes portability to compilers other than gcc, notably
1834 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1836 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1837 makefiles for portability to HP-UX and POSIX correctness.
1839 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1840 Also via indented variable definition in the Makefile.
1841 (Debugging by Oliver Heesakkers).
1843 PP/02 Restore caching of spamd results with expanded spamd_address.
1844 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1846 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1847 Improves build reliability. Fix from: Frank Elsner
1849 NM/02 Fix wide character breakage in the rfc2047 coding
1850 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1852 NM/03 Allow underscore in dnslist lookups
1853 Fixes bug 1026. Patch from Graeme Fowler
1855 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1856 Code patches from Adam Ciarcinski of NetBSD.
1858 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1861 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1862 is logged, to avoid truncation. Patch from John Horne.
1864 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1865 Patch from Jakob Hirsch.
1867 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1868 SQL string expansion failure details.
1869 Patch from Andrey Oktyabrski.
1871 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1872 Patch from Simon Arlott.
1874 PP/09 New lookups functionality failed to compile on old gcc which rejects
1875 extern declarations in function scope.
1876 Patch from Oliver Fleischmann
1878 PP/10 Use sig_atomic_t for flags set from signal handlers.
1879 Check getgroups() return and improve debugging.
1880 Fixed developed for diagnosis in bug 927 (which turned out to be
1883 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1884 Patch from Mark Zealey.
1886 PP/12 Bugzilla 1056: Improved spamd server selection.
1887 Patch from Mark Zealey.
1889 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1890 Based on patch from Heiko Schlittermann.
1892 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1893 Patch from Uwe Doering, sign-off by Michael Haardt.
1895 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1896 variable declaration deep within a block. Bug and patch from
1899 PP/15 lookups-Makefile IRIX compatibility coercion.
1901 PP/16 Make DISABLE_DKIM build knob functional.
1903 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1904 Patch by Simon Arlott
1906 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1907 variable argument macros. Our copy now differs from upstream.
1913 TF/01 Failure to get a lock on a hints database can have serious
1914 consequences so log it to the panic log.
1916 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1917 controlled using the smtp_confirmation log selector.
1919 TF/03 Include the error message when we fail to unlink a spool file.
1921 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1922 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1923 for maintaining out-of-tree patches for some time.
1925 PP/01 Bugzilla 139: Documentation and portability issues.
1926 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1927 Handle per-OS dynamic-module compilation flags.
1929 PP/02 Let /dev/null have normal permissions.
1930 The 4.73 fixes were a little too stringent and complained about the
1931 permissions on /dev/null. Exempt it from some checks.
1932 Reported by Andreas M. Kirchwitz.
1934 PP/03 Report version information for many libraries, including
1935 Exim version information for dynamically loaded libraries. Created
1936 version.h, now support a version extension string for distributors
1937 who patch heavily. Dynamic module ABI change.
1939 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1940 privilege escalation vulnerability whereby the Exim run-time user
1941 can cause root to append content of the attacker's choosing to
1944 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1947 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1948 If dropping privileges for untrusted macros, we disabled normal logging
1949 on the basis that it would fail; for the Exim run-time user, this is not
1950 the case, and it resulted in successful deliveries going unlogged.
1951 Fixed. Reported by Andreas Metzler.
1957 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1958 only prepend for the Resent-* case. Fixes regression introduced in
1959 Exim 4.70 by NM/22 for Bugzilla 607.
1961 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1962 increasing numbers of administrators be bitten by this.
1964 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1966 PP/03 Bugzilla 994: added openssl_options main configuration option.
1968 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1970 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1972 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1974 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1975 without a peer certificate, leading to a segfault because of an
1976 assumption that peers always have certificates. Be a little more
1977 paranoid. Problem reported by Martin Tscholak.
1979 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1980 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1981 NB: ClamAV planning to remove STREAM in "middle of 2010".
1982 CL also introduces -bmalware, various -d+acl logging additions and
1983 more caution in buffer sizes.
1985 PP/09 Implemented reverse_ip expansion operator.
1987 PP/10 Bugzilla 937: provide a "debug" ACL control.
1989 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1991 PP/12 Bugzilla 973: Implement --version.
1993 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1995 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1997 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1999 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2000 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2001 ignore trailing whitespace.
2003 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2005 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2008 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2009 Notification from Dr Andrew Aitchison.
2011 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2012 ExtendedDetectionInfo response format.
2013 Notification from John Horne.
2015 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2018 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2019 XSL and documented dependency on system catalogs, with examples of how
2022 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2025 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2026 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2027 configuration file which is writeable by the Exim user or group.
2029 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2030 of configuration files to cover files specified with the -C option if
2031 they are going to be used with root privileges, not just the default
2034 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2035 option (effectively making it always true).
2037 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2038 files to be used while preserving root privileges.
2040 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2041 that rogue child processes cannot use them.
2043 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2044 run-time user, instead of root.
2046 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2047 Exim run-time user without dropping privileges.
2049 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2050 result string, instead of calling string_vformat() twice with the same
2053 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2054 for other users. Others should always drop root privileges if they use
2055 -C on the command line, even for a whitelisted configure file.
2057 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2059 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2065 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2066 $data_path, and $header_path variables; fixed documentation bugs and
2069 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2070 exipick to access non-standard spools, including the "frozen" queue
2073 NM/01 Bugzilla 965: Support mysql stored procedures.
2074 Patch from Alain Williams
2076 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2078 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2079 Patch from Andreas Metzler
2081 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2082 Patch from Kirill Miazine
2084 NM/05 Bugzilla 671: Added umask to procmail example.
2086 JJ/03 installed exipick 20100323.0, fixing doc bug
2088 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2089 directory. Notification and patch from Dan Rosenberg.
2091 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2093 TK/02 Improve log output when DKIM signing operation fails.
2095 MH/01 Treat the transport option dkim_domain as a colon separated
2096 list, not as a single string, and sign the message with each element,
2097 omitting multiple occurences of the same signer.
2099 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2100 Bugzilla 985, 986. Patch by Simon Arlott
2102 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2103 Patch by Simon Arlott
2105 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2106 MBX locking. Notification from Dan Rosenberg.
2112 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2114 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2116 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2118 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2120 NM/04 Bugzilla 915: Flag broken perl installation during build.
2126 TK/01 Added patch by Johannes Berg that expands the main option
2127 "spamd_address" if it starts with a dollar sign.
2129 TK/02 Write list of recipients to X-Envelope-Sender header when building
2130 the mbox-format spool file for content scanning (suggested by Jakob
2133 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2134 (http://www.dcc-servers.net/) support via dccifd. Activated by
2135 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2137 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2138 by Mark Daniel Reidel <mr@df.eu>.
2140 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2141 When building exim an external PCRE library is now needed -
2142 PCRE is a system library on the majority of modern systems.
2143 See entry on PCRE_LIBS in EDITME file.
2145 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2146 conversation. Added nologin parameter to request.
2147 Patch contributed by Kirill Miazine.
2149 TF/01 Do not log submission mode rewrites if they do not change the address.
2151 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2153 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2154 log files in place. Contributed by Roberto Lima.
2156 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2158 TF/03 Bugzilla 615: When checking the local_parts router precondition
2159 after a local_part_suffix or local_part_prefix option, Exim now
2160 does not use the address's named list lookup cache, since this
2161 contains cached lookups for the whole local part.
2163 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2164 Robert Millan. Documentation is in experimental-spec.txt.
2166 TF/04 Bugzilla 668: Fix parallel build (make -j).
2168 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2170 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2171 Patch provided by Jan Srzednicki.
2173 TF/05 Leading white space used to be stripped from $spam_report which
2174 wrecked the formatting. Now it is preserved.
2176 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2177 that they are available at delivery time.
2179 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2181 TF/08 TLS error reporting now respects the incoming_interface and
2182 incoming_port log selectors.
2184 TF/09 Produce a more useful error message if an SMTP transport's hosts
2185 setting expands to an empty string.
2187 NM/06 Bugzilla 744: EXPN did not work under TLS.
2188 Patch provided by Phil Pennock.
2190 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2191 Patch provided by Richard Godbee.
2193 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2194 acl_smtp_notquit, added index entry.
2196 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2197 Patch provided by Eugene Bujak.
2199 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2200 accept(). Patch provided by Maxim Dounin.
2202 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2203 Patch provided by Phil Pennock.
2205 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2207 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2208 Patch provided by Brad "anomie" Jorsch.
2210 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2211 Patch provided by Dean Brooks.
2213 TK/05 Add native DKIM support (does not depend on external libraries).
2215 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2216 Patch provided by Graeme Fowler.
2218 NM/16 Bugzilla 851: Documentation example syntax fix.
2220 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2222 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2225 NM/19 Bugzilla 745: TLS version reporting.
2226 Patch provided by Phil Pennock.
2228 NM/20 Bugzilla 167: bool: condition support.
2229 Patch provided by Phil Pennock.
2231 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2232 clients. Patch provided by Phil Pennock.
2234 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2235 Patch provided by Brad "anomie" Jorsch.
2237 NM/23 Bugzilla 687: Fix misparses in eximstats.
2238 Patch provided by Heiko Schlittermann.
2240 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2241 Patch provided by Heiko Schlittermann.
2243 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2244 plus update to original patch.
2246 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2248 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2249 Patch provided by David Brownlee.
2251 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2253 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2255 NM/30 Bugzilla 888: TLS documentation bugfixes.
2257 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2259 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2260 Unlike the original bugzilla I have changed all shell scripts in src tree.
2262 NM/33 Bugzilla 898: Transport filter timeout fix.
2263 Patch by Todd Rinaldo.
2265 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2266 Patch by Serge Demonchaux.
2268 NM/35 Bugzilla 39: Base64 decode bug fixes.
2269 Patch by Jakob Hirsch.
2271 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2273 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2275 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2277 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2283 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2284 ALT-N's libdkim that I have put here:
2285 http://duncanthrax.net/exim-experimental/
2287 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2288 were called 'true' and it seems that C99 defines that as a reserved
2289 keyword to be used with 'bool' variable types. That means you could
2290 not include C99-style headers which use bools without triggering
2291 build errors in sieve.c.
2293 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2294 as mailq or other aliases. Changed the --help handling significantly
2295 to do whats expected. exim_usage() emits usage/help information.
2297 SC/01 Added the -bylocaldomain option to eximstats.
2299 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2301 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2303 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2309 PH/01 Another patch from the Sieve maintainer.
2311 PH/02 When an IPv6 address is converted to a string for single-key lookup
2312 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2313 dots are used instead of colons so that keys in lsearch files need not
2314 contain colons. This was done some time before quoting was made available
2315 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2316 (notated using the quote facility) so as to distinguish them from IPv4
2317 keys. This meant that lookups for IP addresses in host lists did not work
2318 for iplsearch lookups.
2320 This has been fixed by arranging for IPv6 addresses to be expressed with
2321 colons if the lookup type is iplsearch. This is not incompatible, because
2322 previously such lookups could never work.
2324 The situation is now rather anomalous, since one *can* have colons in
2325 ordinary lsearch keys. However, making the change in all cases is
2326 incompatible and would probably break a number of configurations.
2328 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2331 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2332 conversion specification without a maximum field width, thereby enabling
2333 a rogue spamd server to cause a buffer overflow. While nobody in their
2334 right mind would setup Exim to query an untrusted spamd server, an
2335 attacker that gains access to a server running spamd could potentially
2336 exploit this vulnerability to run arbitrary code as the Exim user.
2338 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2339 $primary_hostname instead of what libspf2 thinks the hosts name is.
2341 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2342 a directory entry by the name of the lookup key. Previously, if a
2343 symlink pointed to a non-existing file or a file in a directory that
2344 Exim lacked permissions to read, a lookup for a key matching that
2345 symlink would fail. Now it is enough that a matching directory entry
2346 exists, symlink or not. (Bugzilla 503.)
2348 PH/03 The body_linecount and body_zerocount variables are now exported in the
2351 PH/04 Added the $dnslist_matched variable.
2353 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2354 This means they are set thereafter only if the connection becomes
2357 PH/06 Added the client_condition to authenticators so that some can be skipped
2358 by clients under certain conditions.
2360 PH/07 The error message for a badly-placed control=no_multiline_responses left
2361 "_responses" off the end of the name.
2363 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2365 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2366 (without spaces) instead of just copying the configuration text.
2368 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2370 PH/11 Added $max_received_linelength.
2372 PH/12 Added +ignore_defer and +include_defer to host lists.
2374 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2375 way in which PCRE > 7.0 is built.
2377 PH/14 Implemented queue_only_load_latch.
2379 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2380 MAIL command. The effect was to mangle the value on 64-bit systems.
2382 PH/16 Another patch from the Sieve maintainer.
2384 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2386 PH/18 If a system quota error occurred while trying to create the file for
2387 a maildir delivery, the message "Mailbox is full" was not appended to the
2388 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2389 only to a quota excession during the actual writing of the file.
2391 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2392 characters?) which causes problems in log lines. The DN values are now
2393 passed through string_printing() before being added to log lines.
2395 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2396 and InterBase are left for another time.)
2398 PH/21 Added message_body_newlines option.
2400 PH/22 Guard against possible overflow in moan_check_errorcopy().
2402 PH/23 POSIX allows open() to be a macro; guard against that.
2404 PH/24 If the recipient of an error message contained an @ in the local part
2405 (suitably quoted, of course), incorrect values were put in $domain and
2406 $local_part during the evaluation of errors_copy.
2412 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2413 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2416 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2417 issue a MAIL command.
2419 PH/02 In an ACL statement such as
2421 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2423 if a client was not listed at all, or was listed with a value other than
2424 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2425 the condition was not true (as it should be), so access was not denied.
2426 The bug was that the ! inversion was incorrectly passed on to the second
2427 item. This has been fixed.
2429 PH/03 Added additional dnslists conditions == and =& which are different from
2430 = and & when the dns lookup returns more than one IP address.
2432 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2433 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2435 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2436 FSYNC, which compiles an option called disable_fsync that allows for
2437 bypassing fsync(). The documentation is heavily laced with warnings.
2439 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2441 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2442 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2443 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2444 including adding "make clean"; (3) Added -fPIC when compiling the test
2445 dynamically loaded module, to get rid of a warning.
2447 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2448 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2449 = 0s. The bug is otherwise harmless.
2451 PH/07 There was a bug in the dovecot authenticator such that the value of
2452 $auth1 could be overwritten, and so not correctly preserved, after a
2453 successful authentication. This usually meant that the value preserved by
2454 the server_setid option was incorrect.
2456 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2458 PH/09 Installed PCRE release 7.0.
2460 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2461 run for batched SMTP input. It is now run at the start of every message
2462 in the batch. While fixing this I discovered that the process information
2463 (output by running exiwhat) was not always getting set for -bs and -bS
2464 input. This is fixed, and it now also says "batched" for BSMTP.
2466 PH/11 Added control=no_pipelining.
2468 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2469 patch, slightly modified), and move the expansion of helo_data till after
2470 the connection is made in the smtp transport (so it can use these
2473 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2475 PH/14 Added log_selector = +pid.
2477 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2479 PH/16 Add ${if forany and ${if forall.
2481 PH/17 Added dsn_from option to vary the From: line in DSNs.
2483 PH/18 Flush SMTP output before performing a callout, unless control =
2484 no_callout_flush is set.
2486 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2487 was true (the default) a successful delivery failed to delete the retry
2488 item, thus causing premature timeout of the address. The bug is now
2491 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2493 PH/21 Long custom messages for fakedefer and fakereject are now split up
2494 into multiline responses in the same way that messages for "deny" and
2495 other ACL rejections are.
2497 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2498 with slight modification.
2500 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2501 draft, changing the syntax and factoring some duplicate code".
2503 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2504 for deliveries of the second and subsequent messages over the same SMTP
2507 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2508 ${reduce, with only minor "tidies".
2510 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2512 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2513 expansion side effects.
2515 PH/27 When a message times out after an over-quota error from an Exim-imposed
2516 quota, the bounce message says "mailbox is full". This message was not
2517 being given when it was a system quota that was exceeded. It now should
2520 MH/03 Made $recipients available in local_scan(). local_scan() already has
2521 better access to the recipient list through recipients_list[], but
2522 $recipients can be useful in postmaster-provided expansion strings.
2524 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2525 in the case of a MAIL command with additional options following the
2526 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2527 were accidentally chopped off.
2529 PH/29 SMTP synchronization checks are implemented when a command is read -
2530 there is a check that no more input is waiting when there shouldn't be
2531 any. However, for some commands, a delay in an ACL can mean that it is
2532 some time before the response is written. In this time, more input might
2533 arrive, invalidly. So now there are extra checks after an ACL has run for
2534 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2535 pipelining has not been advertised.
2537 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2539 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2540 returned in the SMTP response when smtp_return_error_details was false.
2541 This has been fixed.
2543 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2544 instead of the C I/O that was originally supplied, because problems were
2545 reported on Solaris.
2547 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2548 Exim which did not show up earlier: it was assuming that a call to
2549 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2550 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2551 was a macro that became an assignment, so it seemed to work. This has
2552 changed to a proper function call with a void return, hence the compile
2553 error. Exim's code has been fixed.
2555 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2558 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2560 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2562 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2563 because it turns out to be too big or there is a timeout) there is no
2564 "Completed" line in the log. When some messages of this type were
2565 selected by exigrep, they were listed as "not completed". Others were
2566 picked up by some special patterns. I have improved the selection
2567 criteria to be more general.
2569 PH/38 The host_find_failed option in the manualroute router can now be set
2570 to "ignore", to completely ignore a host whose IP address cannot be
2571 found. If all hosts are ignored, the behaviour is controlled by the new
2572 host_all_ignored option.
2574 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2575 homing or because of multiple MX records with /mx) generated more than
2576 one IP address, and the following item turned out to be the local host,
2577 all the secondary addresses of the first item were incorrectly removed
2578 from the list, along with the local host and any following hosts (which
2579 is what is supposed to happen).
2581 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2582 whoever called Exim into the -H file. In the case of the daemon it was
2583 behaving confusingly. When first started, it used values for whoever
2584 started the daemon, but after a SIGHUP it used the Exim user (because it
2585 calls itself on a restart). I have changed the code so that it now always
2588 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2589 message are rejected with the same error (e.g. no authentication or bad
2590 sender address), and a DATA command is nevertheless sent (as can happen
2591 with PIPELINING or a stupid MUA), the error message that was given to the
2592 RCPT commands is included in the rejection of the DATA command. This is
2593 intended to be helpful for MUAs that show only the final error to their
2596 PH/42 Another patch from the Sieve maintainer.
2598 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2599 Eximstats - Fixed some broken HTML links and added missing column headers
2601 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2602 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2604 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2606 PH/43 Yet another patch from the Sieve maintainer.
2608 PH/44 I found a way to check for a TCP/IP connection going away before sending
2609 the response to the final '.' that terminates a message, but only in the
2610 case where the client has not sent further data following the '.'
2611 (unfortunately, this is allowed). However, in many cases there won't be
2612 any further data because there won't be any more messages to send. A call
2613 to select() can be used: if it shows that the input is "ready", there is
2614 either input waiting, or the socket has been closed. An attempt to read
2615 the next input character can distinguish the two cases. Previously, Exim
2616 would have sent an OK response which the client would never have see.
2617 This could lead to message repetition. This fix should cure that, at
2618 least in a lot of common cases.
2620 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2621 advertised in response to EHLO.
2627 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2628 fixed by 4.65/MH/01 (is this a record?) are fixed:
2630 (i) An empty string was always treated as zero by the numeric comparison
2631 operators. This behaviour has been restored.
2633 (ii) It is documented that the numeric comparison operators always treat
2634 their arguments as decimal numbers. This was broken in that numbers
2635 starting with 0 were being interpreted as octal.
2637 While fixing these problems I realized that there was another issue that
2638 hadn't been noticed. Values of message_size_limit (both the global option
2639 and the transport option) were treated as octal if they started with 0.
2640 The documentation was vague. These values are now always treated as
2641 decimal, and I will make that clear in the documentation.
2647 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2648 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2651 MH/01 Don't check that the operands of numeric comparison operators are
2652 integers when their expansion is in "skipping" mode (fixes bug
2653 introduced by 4.64-PH/07).
2655 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2656 child addresses, Exim now panics and dies. Previously, because the count
2657 is held in a short int, deliveries were likely to be lost. As such a
2658 large number of recipients for a single message is ridiculous
2659 (performance will be very, very poor), I have chosen to impose a limit
2660 rather than extend the field.
2666 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2667 leftover -K file (the existence of which was triggered by #402).
2668 While we were at it, introduced process PID as part of the -K
2669 filename. This should rule out race conditions when creating
2672 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2673 processing considerably. Previous code took too long for large mails,
2674 triggering a timeout which in turn triggers #401.
2676 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2677 in the DK code in transports.c. sendfile() is not really portable,
2678 hence the _LINUX specificness.
2680 TF/01 In the add_headers option to the mail command in an Exim filter,
2681 there was a bug that Exim would claim a syntax error in any
2682 header after the first one which had an odd number of characters
2685 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2686 callout verification, Exim cached a "reject" for the entire domain. This
2687 is correct for most verifications, but it is not correct for a recipient
2688 verification with use_sender or use_postmaster set, because in that case
2689 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2690 case of MAIL FROM:<> rejection from other early rejections (e.g.
2691 rejection of HELO). When verifying a recipient using a non-null MAIL
2692 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2693 Whatever the result of the callout, the value of the domain cache is
2694 left unchanged (for any other kind of callout, getting as far as trying
2695 RCPT means that the domain itself is ok).
2697 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2700 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2701 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2702 session, the daemon ignores ECONNECT errors and logs others; it now
2703 ignores EPIPE as well.
2705 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2706 (quoted-printable decoding).
2708 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2709 later the small subsequent patch to fix an introduced bug.
2711 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2713 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2715 PH/08 An error is now given if message_size_limit is specified negative.
2717 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2718 to be given (somewhat) arbitrary names.
2720 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2723 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2724 miscellaneous code fixes
2726 PH/10 Added the log_reject_target ACL modifier to specify where to log
2729 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2730 hostname. This is wrong, because it relates to the incoming message (and
2731 probably the interface on which it is arriving) and not to the outgoing
2732 callout (which could be using a different interface). This has been
2733 changed to use the value of the helo_data option from the smtp transport
2734 instead - this is what is used when a message is actually being sent. If
2735 there is no remote transport (possible with a router that sets up host
2736 addresses), $smtp_active_hostname is used.
2738 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2739 tweaks were necessary in order to get it to work (see also 21 below):
2740 (a) The code assumed that strncpy() returns a negative number on buffer
2741 overflow, which isn't the case. Replaced with Exim's string_format()
2743 (b) There were several signed/unsigned issues. I just did the minimum
2744 hacking in of casts. There is scope for a larger refactoring.
2745 (c) The code used strcasecmp() which is not a standard C function.
2746 Replaced with Exim's strcmpic() function.
2747 (d) The code set only $1; it now sets $auth1 as well.
2748 (e) A simple test gave the error "authentication client didn't specify
2749 service in request". It would seem that Dovecot has changed its
2750 interface. Fortunately there's a specification; I followed it and
2751 changed what the client sends and it appears to be working now.
2753 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2756 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2757 address A is aliased to B and C, where B exists and C does not. Without
2758 -v the output is "A verified" because verification stops after a
2759 successful redirection if more than one address is generated. However,
2760 with -v the child addresses are also verified. Exim was outputting "A
2761 failed to verify" and then showing the successful verification for C,
2762 with its parentage. It now outputs "B failed to verify", showing B's
2763 parentage before showing the successful verification of C.
2765 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2766 look up a TXT record in a specific list after matching in a combined
2769 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2770 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2771 they consult the DNS. I had assumed they would set it the way they
2772 wanted; and indeed my experiments on Linux seem to show that in some
2773 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2774 To be on the safe side, however, I have now made the interface to
2775 host_find_byname() similar to host_find_bydns(), with an argument
2776 containing the DNS resolver options. The host_find_byname() function now
2777 sets these options at its start, just as host_find_bydns() does. The smtp
2778 transport options dns_qualify_single and dns_search_parents are passed to
2779 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2780 of host_find_byname() use the default settings of RES_DEFNAMES
2781 (qualify_single) but not RES_DNSRCH (search_parents).
2783 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2784 spool_read_header() do less string testing, by means of a preliminary
2785 switch on the second character of optional "-foo" lines. (This is
2786 overdue, caused by the large number of possibilities that now exist.
2787 Originally there were few.) While I was there, I also converted the
2788 str(n)cmp tests so they don't re-test the leading "-" and the first
2789 character, in the hope this might squeeze out yet more improvement.
2791 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2792 flag allowing group syntax was set by the header_syntax check but not
2793 turned off, possible causing trouble later; (2) The flag was not being
2794 set at all for the header_verify test, causing "group"-style headers to
2795 be rejected. I have now set it in this case, and also caused header_
2796 verify to ignore an empty address taken from a group. While doing this, I
2797 came across some other cases where the code for allowing group syntax
2798 while scanning a header line wasn't quite right (mostly, not resetting
2799 the flag correctly in the right place). These bugs could have caused
2800 trouble for malformed header lines. I hope it is now all correct.
2802 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2803 with the "reply" argument non-NULL. The code, however (which originally
2804 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2805 but it didn't always do it. This confused somebody who was copying the
2806 code for some other use. I have removed all the tests.
2808 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2809 feature that was used to support insecure browsers during the U.S. crypto
2810 embargo. It requires special client support, and Exim is probably the
2811 only MTA that supported it -- and would never use it because real RSA is
2812 always available. This code has been removed, because it had the bad
2813 effect of slowing Exim down by computing (never used) parameters for the
2814 RSA_EXPORT functionality.
2816 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2817 authenticator to fail if there's a tab character in the incoming data
2818 (there should never be unless someone is messing about, as it's supposed
2819 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2820 if the connection is using TLS or if the remote IP is the same as the
2821 local IP, and the "valid-client-cert option" if a client certificate has
2824 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2825 authenticators. This can be used for authorization after authentication
2826 succeeds. (In the case of plaintext, it servers for both authentication
2829 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2830 if any retry times were supplied.
2832 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2833 connection, where there is no client IP address to check. In this
2834 situation, the verify now always succeeds.
2836 PH/25 Applied John Jetmore's -Mset patch.
2838 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2840 PH/27 In a string expansion for a processed (not raw) header when multiple
2841 headers of the same name were present, leading whitespace was being
2842 removed from all of them, but trailing whitespace was being removed only
2843 from the last one. Now trailing whitespace is removed from each header
2844 before concatenation. Completely empty headers in a concatenation (as
2845 before) are ignored.
2847 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2848 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2850 PH/29 [Removed. This was a change that I later backed out, and forgot to
2851 correct the ChangeLog entry (that I had efficiently created) before
2852 committing the later change.]
2854 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2855 address errors (4xx response to RCPT) over the same connection as other
2856 messages routed to the same hosts. Such deliveries are always "forced",
2857 so retry times are not inspected. This resulted in far too many retries
2858 for the affected addresses. The effect occurred only when there were more
2859 hosts than the hosts_max_try setting in the smtp transport when it had
2860 the 4xx errors. Those hosts that it had tried were not added to the list
2861 of hosts for which the message was waiting, so if all were tried, there
2862 was no problem. Two fixes have been applied:
2864 (i) If there are any address or message errors in an SMTP delivery, none
2865 of the hosts (tried or untried) are now added to the list of hosts
2866 for which the message is waiting, so the message should not be a
2867 candidate for sending over the same connection that was used for a
2868 successful delivery of some other message. This seems entirely
2869 reasonable: after all the message is NOT "waiting for some host".
2870 This is so "obvious" that I'm not sure why it wasn't done
2871 previously. Hope I haven't missed anything, but it can't do any
2872 harm, as the worst effect is to miss an optimization.
2874 (ii) If, despite (i), such a delivery is accidentally attempted, the
2875 routing retry time is respected, so at least it doesn't keep
2876 hammering the server.
2878 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2879 in ${readsocket because some servers need this prod.
2881 PH/32 Added some extra debug output when updating a wait-xxx database.
2883 PH/33 The hint "could be header name not terminated by colon", which has been
2884 given for certain expansion errors for a long time, was not being given
2885 for the ${if def:h_colon_omitted{... case.
2887 PH/34 The spec says: "With one important exception, whenever a domain list is
2888 being scanned, $domain contains the subject domain." There was at least
2889 one case where this was not true.
2891 PH/35 The error "getsockname() failed: connection reset by peer" was being
2892 written to the panic log as well as the main log, but it isn't really
2893 panic-worthy as it just means the connection died rather early on. I have
2894 removed the panic log writing for the ECONNRESET error when getsockname()
2897 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2898 runs only) independently of the message's sender address. This meant
2899 that, if the 4xx error was in fact related to the sender, a different
2900 message to the same recipient with a different sender could confuse
2901 things. In particular, this can happen when sending to a greylisting
2902 server, but other circumstances could also provoke similar problems.
2903 I have changed the default so that the retry time for these errors is now
2904 based a combination of the sender and recipient addresses. This change
2905 can be overridden by setting address_retry_include_sender=false in the
2908 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2909 remote server are returned as part of bounce messages. This was not
2910 happening for LMTP over a pipe (the lmtp transport), but now it is the
2911 same for both kinds of LMTP.
2913 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2914 in header lines that were in fact CNAMEs. This is no longer the case.
2916 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2917 and queue runs started by the daemon processed all messages. This has
2918 been fixed so that -R and -S can now usefully be given with -q<time>.
2920 PH/40 Import PCRE release 6.7 (fixes some bugs).
2922 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2924 PH/42 Give an error if -q is specified more than once.
2926 PH/43 Renamed the variables $interface_address and $interface_port as
2927 $received_ip_address and $received_port, to make it clear that these
2928 values apply to message reception, and not to the outgoing interface when
2929 a message is delivered. (The old names remain recognized, of course.)
2931 PH/44 There was no timeout on the connect() call when using a Unix domain
2932 socket in the ${readsocket expansion. There now is.
2934 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2935 be meaningful with "accept".
2937 SC/01 Eximstats V1.43
2938 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2940 SC/02 Eximstats V1.44
2941 Use a glob alias rather than an array ref in the generated
2942 parser. This improves both readability and performance.
2944 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2945 Collect SpamAssassin and rejection statistics.
2946 Don't display local sender or destination tables unless
2947 there is data to show.
2948 Added average volumes into the top table text output.
2950 SC/04 Eximstats V1.46
2951 Collect data on the number of addresses (recipients)
2952 as well as the number of messages.
2954 SC/05 Eximstats V1.47
2955 Added 'Message too big' to the list of mail rejection
2956 reasons (thanks to Marco Gaiarin).
2958 SC/06 Eximstats V1.48
2959 Mainlog lines which have GMT offsets and are too short to
2960 have a flag are now skipped.
2962 SC/07 Eximstats V1.49 (Alain Williams)
2963 Added the -emptyok flag.
2965 SC/08 Eximstats V1.50
2966 Fixes for obtaining the IP address from reject messages.
2968 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2969 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2970 whitespace changes from 4.64-PH/27
2972 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2975 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2976 are found, allow negative numbers in numeric criteria)
2978 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2980 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2981 to match changes made in 4.64-PH/43
2983 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2985 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2986 "domain" is actually an IP address, and force a failure. This locks out
2987 those revolvers/nameservers that support "A-for-A" lookups, in
2988 contravention of the specifications.
2990 PH/48 When a host name was looked up from an IP address, and the subsequent
2991 forward lookup of the name timed out, the host name was left in
2992 $sender_host_name, contrary to the specification.
2994 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2995 restricted to single-key lookups, Exim was not diagnosing an error if
2996 * or *@ was used with a query-style lookup.
2998 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3000 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3001 long ago, but noone interested enough thought of it. Let's just say that
3002 the "1.1" means that there are some new functions that weren't there at
3003 some point in the past.
3005 PH/51 Error processing for expansion failure of helo_data from an smtp
3006 transport during callout processing was broken.
3008 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3009 tested/used via the -bh/-bhc/-bs options.
3011 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3012 bug, fixed in subsequent PCRE releases).
3014 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3015 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3017 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3023 SC/01 Use a glob alias rather than an array ref in eximstats generated
3024 parser. This improves both readability and performance.
3026 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3027 Don't display local sender or destination tables in eximstats unless
3028 there is data to show.
3029 Added average volumes into the eximstats top table text output.
3031 SC/03 Collect data on the number of addresses (recipients) as well
3032 as the number of messages in eximstats.
3034 TF/01 Correct an error in the documentation for the redirect router. Exim
3035 does (usually) call initgroups() when daemonizing.
3037 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3038 with consistent privilege compared to when running as a daemon.
3040 TF/03 Note in the spec that $authenticated_id is not set for local
3041 submissions from trusted users.
3043 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3044 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3046 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3047 by adding some example configuration directives to the default
3048 configuration file. A little bit of work is required to uncomment the
3049 directives and define how usernames and passwords are checked, but
3050 there is now a framework to start from.
3052 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3053 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3054 without this. I don't know how relevant this is to other LDAP libraries.
3056 PH/02 Add the verb name to the "unknown ACL verb" error.
3058 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3060 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3062 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3063 directory not expanded when it should be if an expanded home directory
3064 was set for the address (which is overridden by the transport).
3066 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3069 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3070 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3071 because it is too late at that time, and has no effect.
3073 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3074 security issue with \' (bugzilla #107). I could not use the
3075 PQescapeStringConn() function, because it needs a PGconn value as one of
3078 PH/08 When testing addresses using -bt, indicate those final addresses that
3079 are duplicates that would not cause an additional delivery. At least one
3080 person was confused, thinking that -bt output corresponded to deliveries.
3081 (Suppressing duplicates isn't a good idea as you lose the information
3082 about possibly different redirections that led to the duplicates.)
3084 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3085 systems where poll() doesn't work, in particular OS X.
3087 PH/10 Added more information to debugging output for retry time not reached.
3089 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3090 operations in malware.c.
3092 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3095 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3096 syslog_duplication set false, log lines that would normally be written
3097 both the the main log and to the reject log were not written to syslog at
3100 PH/14 In the default configuration, change the use of "message" in ACL warn
3101 statements to "add_header".
3103 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3104 not followed by a command (e.g. "seen endif").
3106 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3107 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3110 PH/17 Added extra conditions to the default value of delay_warning_condition
3114 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3115 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3116 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3119 The Auto-Submitted: and various List- headers are standardised, whereas I
3120 don't think Precedence: ever was.
3122 PH/18 Refactored debugging code in route_finduser() to show more information,
3123 in particular, the error code if getpwnam() issues one.
3125 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3126 This is apparently needed in addition to the PH/07 change above to avoid
3127 any possible encoding problems.
3129 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3130 but not after initializing Perl.
3132 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3133 output them only if debugging. By default they are written stderr,
3134 apparently, which is not desirable.
3136 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3139 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3142 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3144 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3145 authenticated or an ident call has been made. Suppress the default
3146 values for $authenticated_id and $authenticated_sender (but permit -oMai
3147 and -oMas) when testing with -bh.
3149 PH/24 Re-jigged the order of the tests in the default configuration so that the
3150 tests for valid domains and recipients precede the DNS black list and CSA
3151 tests, on the grounds that those ones are more expensive.
3153 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3154 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3155 This bug exists in every version of Exim that I still have, right back to
3158 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3159 However, an attempt to turn on case-sensitivity in a regex key by
3160 including (?-i) didn't work because the subject string was already
3161 lowercased, and the effects were non-intuitive. It turns out that a
3162 one-line patch can be used to allow (?-i) to work as expected.
3168 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3169 other effects) broke the use of negated acl sub-conditions.
3171 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3174 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3175 "Deny" causes Exim to reject the incoming connection with a 554 error.
3176 Unfortunately, if there is a major crisis, such as a disk failure,
3177 tcp-wrappers gives "deny", whereas what one would like would be some
3178 kind of temporary error. A kludge has been added to help with this.
3179 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3180 554 error is used if errno is still zero or contains ENOENT (which occurs
3181 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3184 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3186 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3187 errors. Otherwise a message that provokes a temporary error (when other
3188 messages do not) can cause a whole host to time out.
3190 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3191 addresses were routed directly to files or pipes from a redirect router.
3192 File deliveries just didn't batch; pipe deliveries might have suffered
3195 PH/06 A failure to get a lock for a hints database would erroneously always say
3196 "Failed to get write lock", even when it was really a read lock.
3198 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3199 of 0600. This has been changed to use the value of the lockfile_mode
3200 option (which defaults to 0600).
3202 PH/08 Applied small patch from the Sieve maintainer.
3204 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3205 folder from quota calculations, a direct delivery into this folder messed
3206 up the contents of the maildirsize file. This was because the regex was
3207 used only to exclude .Trash (or whatever) when the size of the mailbox
3208 was calculated. There was no check that a delivery was happening into an
3209 excluded directory. This bug has been fixed by ignoring all quota
3210 processing for deliveries into excluded directories.
3212 PH/10 Added the maildirfolder_create_regex option to appendfile.
3218 PH/01 The code for finding all the local interface addresses on a FreeBSD
3219 system running IPv6 was broken. This may well have applied to all BSD
3220 systems, as well as to others that have similar system calls. The broken
3221 code found IPv4 interfaces correctly, but gave incorrect values for the
3222 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3223 that it would not match correctly against @[] and not recognize the IPv6
3226 PH/02 The ipliteral router was not recognizing addresses of the form user@
3227 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3229 PH/03 Added disable_ipv6.
3231 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3232 decoded form, because it is most often used to construct To: headers
3233 lines in autoreplies, and the decoded form may well be syntactically
3234 invalid. However, $reply_address has leading white space removed, and all
3235 newlines turned into spaces so that the autoreply transport does not
3238 PH/05 If group was specified without a user on a router, and no group or user
3239 was specified on a transport, the group from the router was ignored.
3241 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3242 for visible compile-time settings that can be used to change these
3243 numbers, for those that want even more. Backwards compatibility with old
3244 spool files has been maintained. However, going back to a previous Exim
3245 release will lost any variables that are in spool files.
3247 PH/07 Two small changes when running in the test harness: increase delay when
3248 passing a TCP/IP connection to a new process, in case the original
3249 process has to generate a bounce, and remove special handling of
3250 127.0.0.2 (sic), which is no longer necessary.
3252 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3253 be the same on different OS.
3255 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3258 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3259 whether --show-vars was specified or not
3261 JJ/02 exipick: Added support for new ACL variable spool format introduced
3264 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3265 syntactically invalid From: or Reply-to: line, and a filter used this to
3266 generate an autoreply, and therefore failed to obtain an address for the
3267 autoreply, Exim could try to deliver to a non-existent relative file
3268 name, causing unrelated and misleading errors. What now happens is that
3269 it logs this as a hard delivery error, but does not attempt to create a
3272 PH/11 The exinext utility has a -C option for testing purposes, but although
3273 the given file was scanned by exinext itself; it wasn't being passed on
3274 when Exim was called.
3276 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3277 an end-of-file indication when reading a command response.
3279 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3280 compiled. In many other places in Exim, IPv6 addresses are always
3281 recognized, so I have changed this. It also means that IPv4 domain
3282 literals of the form [IPV4:n.n.n.n] are now always recognized.
3284 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3285 used if the router is not running as root, for example, when verifying at
3286 ACL time, or when using -bh. The debugging output from this situation was
3287 non-existent - all you got was a failure to exec. I have made two
3290 (a) Failures to set uid/gid, the current directory, or a process leader
3291 in a subprocess such as that created by queryprogram now generate
3292 suitable debugging output when -d is set.
3294 (b) The queryprogram router detects when it is not running as root,
3295 outputs suitable debugging information if -d is set, and then runs
3296 the subprocess without attempting to change uid/gid.
3298 PH/15 Minor change to Makefile for building test_host (undocumented testing
3301 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3302 additional section of a DNS packet that returns MX or SRV records.
3303 Instead, it always explicitly searches for A/AAAA records. This avoids
3304 major problems that occur when a DNS server includes only records of one
3305 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3306 fixed another bug: if SRV records were looked up and the corresponding
3307 address records were *not* found in the additional section, the port
3308 values from the SRV records were lost.
3310 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3311 using the correct key (the original address) when searching the retry
3312 rules in order to find which one to use for generating the retry hint.
3314 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3315 adding the default one. Similarly, if it contains a Reply-To: header, the
3316 errors_reply_to option, if set, is not used.
3318 PH/19 When calculating a retry time, Exim used to measure the "time since
3319 failure" by looking at the "first failed" field in the retry record. Now
3320 it does not use this if it is later than than the arrival time of the
3321 message. Instead it uses the arrival time. This makes for better
3322 behaviour in cases where some deliveries succeed, thus re-setting the
3323 "first failed" field. An example is a quota failure for a huge message
3324 when small messages continue to be delivered. Without this change, the
3325 "time since failure" will always be short, possible causing more frequent
3326 delivery attempts for the huge message than are intended.
3327 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3329 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3330 $1, $2, $3) because the numerical variables can be reset during some
3331 expansion items (e.g. "match"), thereby losing the authentication data.
3333 PH/21 Make -bV show the size of off_t variables so that the test suite can
3334 decide whether to run tests for quotas > 2G.
3336 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3337 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3338 filecount value is greater than 2G or if a quota value is greater than 2G
3339 on a system where the size of off_t is not greater than 4, a panic error
3342 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3343 never match. The debug and -bh output now contains an explicit error
3344 message indicating a malformed IPv4 address or mask.
3346 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3347 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3348 PH/23 above applies.
3350 PH/25 Do not write to syslog when running in the test harness. The only
3351 occasion when this arises is a failure to open the main or panic logs
3352 (for which there is an explicit test).
3354 PH/26 Added the /no_tell option to "control=freeze".
3356 PH/27 If a host name lookup failed very early in a connection, for example, if
3357 the IP address matched host_lookup and the reverse lookup yielded a name
3358 that did not have a forward lookup, an error message of the form "no IP
3359 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3360 could be logged. Now it outputs the IP address instead of "NULL".
3362 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3363 allows the sender and the authenticated sender to be set when
3364 submitting a message from within Exim. Since child_open_exim() is
3365 documented for local_scan(), the new function should be too.
3367 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3368 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3369 results in an empty string is now treated as unset.
3371 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3373 PH/31 Added sender_verify_fail logging option.
3375 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3376 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3377 tidied the source and removed it altogether.
3379 PH/33 When a queue run was abandoned because the load average was too high, a
3380 log line was always written; now it is written only if the queue_run log
3381 selector is set. In addition, the log line for abandonment now contains
3382 information about the queue run such as the pid. This is always present
3383 in "start" and "stop" lines but was omitted from the "abandon" line.
3385 PH/34 Omit spaces between a header name and the colon in the error message that
3386 is given when verify = headers_syntax fails (if there are lots of them,
3387 the message gets confusing).
3389 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3390 names, as there are now some PTR records that contain slashes. This check
3391 is only to protect against broken name servers that fall over on strange
3392 characters, so the fact that it applies to all lookups doesn't matter.
3394 PH/36 Now that the new test suite is complete, we can remove some of the
3395 special code in Exim that was needed for the old test suite. For example,
3396 sorting DNS records because real resolvers return them in an arbitrary
3397 order. The new test suite's fake resolver always returns records in the
3400 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3401 bounces) except when queue_only is set, to avoid logging races between
3402 the different processes.
3404 PH/38 Panic-die if .include specifies a non-absolute path.
3406 PH/39 A tweak to the "H" retry rule from its user.
3408 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3409 a label. They prevented compilation on older perls.
3411 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3412 a warning to be raised on newish perls.
3414 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3415 on queue. Changes to match documented behaviour of showing count of
3416 messages matching specified criteria.
3418 PH/40 Changed the default ident timeout from 30s to 5s.
3420 PH/41 Added support for the use of login_cap features, on those BSD systems
3421 that have them, for controlling the resources used by pipe deliveries.
3423 PH/42 The content-scanning code uses fopen() to create files in which to put
3424 message data. Previously it was not paying any attention to the mode of
3425 the files. Exim runs with umask(0) because the rest of the code creates
3426 files with open(), and sets the required mode explicitly. Thus, these
3427 files were ending up world-writeable. This was not a big issue, because,
3428 being within the spool directory, they were not world-accessible. I have
3429 created a function called modefopen, which takes an additional mode
3430 argument. It sets umask(777), creates the file, chmods it to the required
3431 mode, then resets the umask. All the relevant calls to fopen() in the
3432 content scanning code have been changed to use this function.
3434 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3435 to 24 hours. This avoids potential overflow problems when processing G
3436 and H retry rules. I suspect nobody ever tinkers with this value.
3438 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3440 PH/45 When the plaintext authenticator is running as a client, the server's
3441 challenges are checked to ensure they are valid base64 strings. By
3442 default, the authentication attempt is cancelled if an invalid string is
3443 received. Setting client_ignore_invalid_base64 true ignores these errors.
3444 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3445 they are received. Thus, the responses can be made to depend on the
3446 challenges. If an invalid string is ignored, an empty string is placed in
3449 PH/46 Messages that are created by the autoreply transport now contains a
3450 References: header, in accordance with RFCs 2822 and 3834.
3452 PH/47 Added authenticated_sender_force to the smtp transport.
3454 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3456 PH/49 Installed latest patch from the Sieve maintainer.
3458 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3459 was also set, the appendfile transport was unnecessarily scanning a
3460 directory of message files (e.g. for maildir delivery) to find the count
3461 of files (along with the size), even though it did not need this
3462 information. It now does the scan only if it needs to find either the
3463 size of the count of files.
3465 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3467 PH/52 Two bugs concerned with error handling when the smtp transport is
3470 (i) Exim was not creating retry information for temporary errors given
3471 for individual recipients after the DATA command when the smtp transport
3472 was used in LMTP mode. This meant that they could be retried too
3473 frequently, and not timed out correctly.
3475 (ii) Exim was setting the flag that allows error details to be returned
3476 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3477 recipients that were returned after the DATA command.
3479 PH/53 This is related to PH/52, but is more general: for any failing address,
3480 when detailed error information was permitted to be returned to the
3481 sender, but the error was temporary, then after the final timeout, only
3482 "retry timeout exceeded" was returned. Now it returns the full error as
3483 well as "retry timeout exceeded".
3485 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3486 do this, and (what is worse) MTAs that accept it.
3488 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3489 will now be deprecated.
3491 PH/56 New os.c-cygwin from the Cygwin maintainer.
3493 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3494 formats (previously only available in exim formats via -bpr, -bpru,
3495 and -bpra. Now also available in native and exiqgrep formats)
3497 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3498 with very large, slow to parse queues
3500 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3502 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3504 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3505 responses to authentication challenges, though it was showing the
3506 challenges; (ii) I've removed the CR characters from the debug output for
3509 PH/58 Allow for the insertion of a newline as well as a space when a string
3510 is turned into more than one encoded-word during RFC 2047 encoding. The
3511 Sieve code now uses this.
3513 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3514 data_4xx, lost_connection, tls_required.
3516 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3517 message was being sent as an SMTP response.
3519 PH/61 Add -l and -k options to exicyclog.
3521 PH/62 When verifying, if an address was redirected to one new address, so that
3522 verification continued, and the new address failed or deferred after
3523 having set something in $address_data, the value of $address_data was not
3524 passed back to the ACL. This was different to the case when no
3525 redirection occurred. The value is now passed back in both cases.
3527 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3528 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3529 use login_cap.h, so on its own it isn't the distinguishing feature. The
3530 new name refers directly to the setclassresources() function.
3532 PH/65 Added configuration files for NetBSD3.
3534 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3536 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3537 is preferred over IPv4.
3539 PH/68 The bounce_return_message and bounce_return_body options were not being
3540 honoured for bounces generated during the reception of non-SMTP messages.
3541 In particular, this applied to messages rejected by the ACL. This bug has
3542 been fixed. However, if bounce_return_message is true and bounce_return_
3543 body is false, the headers that are returned for a non-SMTP message
3544 include only those that have been read before the error was detected.
3545 (In the case of an ACL rejection, they have all been read.)
3547 PH/69 The HTML version of the specification is now built in a directory called
3548 spec_html instead of spec.html, because the latter looks like a path with
3549 a MIME-type, and this confuses some software.
3551 PH/70 Catch two compiler warnings in sieve.c.
3553 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3554 function verify_get_ident() calls ip_connect() to connect a socket, but
3555 if the "connect()" function timed out, ip_connect() used to close the
3556 socket. However, verify_get_ident() also closes the socket later, and in
3557 between Exim writes to the log, which may get opened at this point. When
3558 the socket was closed in ip_connect(), the log could get the same file
3559 descriptor number as the socket. This naturally causes chaos. The fix is
3560 not to close the socket in ip_connect(); the socket should be closed by
3561 the function that creates it. There was only one place in the code where
3562 this was missing, in the iplookup router, which I don't think anybody now
3563 uses, but I've fixed it anyway.
3565 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3566 well as to direct DNS lookups. Otherwise the handling of names in host
3567 lists is inconsistent and therefore confusing.
3573 PH/01 Two changes to the default runtime configuration:
3575 (1) Move the checks for relay_from_hosts and authenticated clients from
3576 after to before the (commented out) DNS black list checks.
3578 (2) Add control=submission to the relay_from_hosts and authenticated
3579 clients checks, on the grounds that messages accepted by these
3580 statements are most likely to be submissions.
3582 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3584 (1) Generate an error if the third argument for the ${prvs expansion is
3587 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3590 (3) Reset the variables that are obtained from the first argument of
3591 ${prvscheck and used in the second argument before leaving the code,
3592 because their memory is reclaimed, so using them afterwards may do
3595 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3596 one (it's much easier than Tom thought :-).
3598 (5) Because of (4), we can now allow for the use of $prvscheck_result
3599 inside the third argument.
3601 PH/03 For some reason, the default setting of PATH when running a command from
3602 a pipe transport was just "/usr/bin". I have changed it to
3605 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3606 anything to be listed in the output from -bV.
3608 PH/05 When a filter generated an autoreply, the entire To: header line was
3609 quoted in the delivery log line, like this:
3611 => >A.N.Other <ano@some.domain> <original@ddress> ...
3613 This has been changed so that it extracts the operative address. There
3614 may be more than one such address. If so, they are comma-separated, like
3617 => >ano@some.domain,ona@other.domain <original@ddress> ...
3619 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3620 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3621 not being looked up in the rDNS to get a host name, Exim was showing the
3622 IP address twice in Received: lines, even though the IP addresses were
3623 identical. For example:
3625 Received: from [1.2.3.4] (helo=[1.2.3.4])
3627 However, if the real host name was known, it was omitting the HELO data
3628 if it matched the actual IP address. This has been tidied up so that it
3629 doesn't show the same IP address twice.
3631 PH/07 When both +timestamp and +memory debugging was on, the value given by
3632 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3633 called by the debug printing, thereby overwriting the timestamp buffer.
3634 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3636 PH/08 When the original message was included in an autoreply transport, it
3637 always said "this is a copy of the message, including all the headers",
3638 even if body_only or headers_only was set. It now gives an appropriate
3641 PH/09 Applied a patch from the Sieve maintainer which:
3643 o fixes some comments
3644 o adds the (disabled) notify extension core
3645 o adds some debug output for the result of if/elsif tests
3646 o points to the current vacation draft in the documentation
3647 and documents the missing references header update
3651 o fixes a bug in processing the envelope test (when testing
3652 multiple envelope elements, the last element determined the
3655 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3656 Electronic Mail") by including:
3658 Auto-submitted: auto-generated
3660 in the messages that it generates (bounce messages and others, such as
3661 warnings). In the case of bounce messages for non-SMTP messages, there was
3662 also a typo: it was using "Auto_submitted" (underscore instead of
3663 hyphen). Since every message generated by Exim is necessarily in response
3664 to another message, thes have all been changed to:
3666 Auto-Submitted: auto-replied
3668 in accordance with these statements in the RFC:
3670 The auto-replied keyword:
3672 - SHOULD be used on messages sent in direct response to another
3673 message by an automatic process,
3675 - MUST NOT be used on manually-generated messages,
3677 - MAY be used on Delivery Status Notifications (DSNs) and Message
3678 Disposition Notifications (MDNs),
3680 - MUST NOT be used on messages generated by automatic or periodic
3681 processes, except for messages which are automatic responses to
3684 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3685 to the default Received: header definition.
3687 PH/12 Added log selector acl_warn_skipped (default on).
3689 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3690 variables because (a) they are in the wrong storage pool and (b) even if
3691 they were copied, it wouldn't work properly because of the caching.
3693 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3694 checking when decoding. Apparently there are clients that generate
3695 overlong encoded strings. Why am I not surprised?
3697 PH/15 If the first argument of "${if match_address" was not empty, but did not
3698 contain an "@" character, Exim crashed. Now it writes a panic log message
3699 and treats the condition as false.
3701 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3703 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3704 extension "envelope-auth". The code is finished and in agreement with
3705 other implementations, but there is no documentation so far and in fact,
3706 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3707 not changing the active code.
3709 Print executed "if" and "elsif" statements when debugging is used. This
3710 helps a great deal to understand what a filter does.
3712 Document more things not specified clearly in RFC3028. I had all this
3713 sorted out, when out of a sudden new issues came to my mind. Oops."
3715 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3718 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3719 canonical form (as documented). However, after a host name lookup from
3720 the IP address, check_host() was doing a simple string comparison with
3721 addresses acquired from the DNS when checking that the found name did
3722 have the original IP as one of its addresses. Since any found IPv6
3723 addresses are likely to be in abbreviated form, the comparison could
3724 fail. Luckily, there already exists a function for doing the comparison
3725 by converting both addresses to binary, so now that is used instead of
3726 the text comparison.
3728 PH/20 There was another similar case to PH/19, when a complete host name was
3729 given in a host list; looking up its IP address could give an abbreviated
3730 form, whereas the current host's name might or might not be abbreviated.
3731 The same fix has been applied.
3737 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3738 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3741 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3742 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3744 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3746 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3747 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3748 Also, for "Auto-Submitted", treat anything other than "no" as
3749 non-personal, in accordance with RFC 3834. (Previously it treated
3750 anything starting "auto-" as non-personal.)
3752 TF/01 The control=submission/name=... option had a problem with syntax
3753 errors if the name included a slash character. The /name= option
3754 now slurps the rest of the string, so it can include any characters
3755 but it must come last in the list of options (after /sender_retain
3758 PH/05 Some modifications to the interface to the fake nameserver for the new
3766 TK/01 Added the "success_on_redirect" address verification option. See
3767 NewStuff for rationale and an example.
3769 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3771 PH/02 Patch to exigrep to allow it to work on syslog lines.
3773 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3774 fread() to skip over the body file's header line, because in Cygwin the
3775 header line is locked and is inaccessible.
3777 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3778 co-exist for some time) to make it clear that it is the Exim ID that is
3779 referenced, not the Message-ID: header line.
3781 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3782 string_format() function, because snprintf() does not exist on all
3785 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3786 ${stat: expansion item.
3788 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3789 protocol synchronization error", to keep the pedants happy.
3791 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3792 well as for IRIX systems, when gcc is being used. See the host.c source
3795 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3797 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3800 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3801 transport and to the smtp transport in LMTP mode.
3803 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3805 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3806 run a filter in a subprocess. This could lead to confusion in subsequent
3807 lookups in the parent process. There should also be a search_tidyup() at
3808 the end of the subprocess.
3810 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3811 only if the host matched helo_try_verify_hosts, which caused the
3812 verification to occur when the EHLO/HELO command was issued. The ACL just
3813 tested the remembered result. Now, if a previous verification attempt has
3814 not happened, "verify = helo" does it there and then.
3816 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3818 TK/03 Fix log output including CR from clamd.
3820 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3821 exist provoked a memory error which could cause a segfault.
3823 PH/15 Installed PCRE 6.2
3825 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3827 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3828 of the problem. Specifically, suggested +O2 rather than +O1 for the
3831 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3833 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3834 record, the port was not correctly logged when the outgoing_port log
3835 selector was set (it logged the transort's default port).
3837 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3838 fallback_hosts, and "hosts" in the smtp transport.
3840 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3841 host errors such as "Connection refused".
3843 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3844 authentication with radiusclient 0.4.9:
3846 - Error returned from rc_read_config was caught wrongly
3847 - Username/password not passed on to radius server due to wrong length.
3849 The presumption is that some radiusclient API changes for 4.51/PH/17
3850 were not taken care of correctly. The code is still untested by me (my
3851 Linux distribution still has 0.3.2 of radiusclient), but it was
3852 contributed by a Radius user.
3854 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3855 expanding the "port" option of the smtp transport.
3857 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3858 while reading a MIME header. Thanks to Tom Hughes for a patch.
3860 PH/24 Include config.h inside local_scan.h so that configuration settings are
3863 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3864 that in an ACL for RCPT (for example), you can examine exactly what was
3867 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3868 commands, but it was not correctly comparing the address with the actual
3869 client host address. Thus, it would show the EHLO address in Received:
3870 header lines when this was not necessary.
3872 PH/27 Added the % operator to ${eval:}.
3874 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3875 it should be ignoring failures (because with -C, for example, it has lost
3876 privilege). It wasn't ignoring creation failures other than "already
3879 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3882 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3883 because an input line was too long, either on its own, or by virtue of
3884 too many continuations, the temporary file was not being removed, and the
3885 return code was incorrect.
3887 PH/31 Missing "BOOL" in function definition in filtertest.c.
3889 PH/32 Applied Sieve patches from the maintainer.
3891 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3893 PH/33 Added "verify = not_blind".
3895 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3896 Local/Makefile (with some defaults set). These are used in built scripts
3897 such as exicyclog, but they have never been used in the exim_install
3898 script (though there are many overriding facilities there). I have
3899 arranged that the exim_install script now takes note of these two
3902 PH/35 Installed configuration files for Dragonfly.
3904 PH/36 When a locally submitted message by a trusted user did not contain a
3905 From: header, and the sender address was obtained from -f or from an SMTP
3906 MAIL command, and the trusted user did not use -F to supply a sender
3907 name, $originator_name was incorrectly used when constructing a From:
3908 header. Furthermore, $originator_name was used for submission mode
3909 messages from external hosts without From: headers in a similar way,
3910 which is clearly wrong.
3912 PH/37 Added control=suppress_local_fixups.
3914 PH/38 When log_selector = +received_sender was set, and the addition of the
3915 sender made the log line's construction buffer exactly full, or one byte
3916 less than full, an overflow happened when the terminating "\n" was
3919 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3920 when the result of a list match is failure because a DNS lookup failed.
3922 PH/40 RM_COMMAND is now used in the building process.
3924 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3925 the "build-* directories that it finds.
3927 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3928 address in a domain literal was a prefix of an interface address.
3930 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3931 when verifying a sender address, unless rewrite_headers is false.
3933 PH/44 Wrote a long comment about why errors_to addresses are verified as
3934 recipients, not senders.
3936 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3937 the ratelimit ACL was added.
3939 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3941 PH/46 Added extra information about PostgreSQL errors to the error string.
3943 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3944 avoiding the need to install special zones in a real server. This is
3945 backwards compatible; if it can't find the fake resolver, it drops back.
3946 Thus, both old and new test suites can be run.
3948 TF/02 Added util/ratelimit.pl
3950 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3951 clock is set back in time.
3953 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3954 Candler <B.Candler@pobox.com>.
3956 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3957 OK for addresses that are the result of redirections.
3959 PH/48 A number of further additions for the benefit of the new test suite,
3960 including a fake gethostbyname() that interfaces to the fake DNS resolver
3963 TF/06 The fix for widen_domains has also been applied to qualify_single and
3964 search_parents which are the other dnslookup options that can cause
3967 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3970 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3972 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3973 service" if it encountered an MX record with an empty target hostname.
3974 The message is now "an MX or SRV record indicated no SMTP service".
3976 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3977 if the DNS of the sending site is misconfigured. This is quite a
3978 common situation. This change restores the behaviour of treating a
3979 helo verification defer as a failure.
3981 PH/51 If self=fail was set on a router, the bounce message did not include the
3982 actual error message.
3988 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3990 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3991 command itself ended in error, the underlying message about the transport
3992 filter timeout was being overwritten with the pipe command error. Now the
3993 underlying error message should be appended to the second error message.
3995 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3997 PH/02 Reduce the amount of output that "make" produces by default. Full output
3998 can still be requested.
4000 PH/03 The warning log line about a condition test deferring for a "warn" verb
4001 was being output only once per connection, rather than after each
4002 occurrence (because it was using the same function as for successful
4003 "warn" verbs). This seems wrong, so I have changed it.
4005 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4006 it should not have, which might have caused a crash in the right
4007 circumstances, but probably never did.
4009 PH/04 Installed a modified version of Tony Finch's patch to make submission
4010 mode fix the return path as well as the Sender: header line, and to
4011 add a /name= option so that you can make the user's friendly name appear
4014 TF/03 Added the control = fakedefer ACL modifier.
4016 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4017 Mark Lowes for thorough testing.
4019 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4021 TK/03 Merged latest SRS patch from Miles Wilton.
4023 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4024 with the definition in sysexits.h (which is #included earlier).
4025 Fortunately, Exim does not actually use EX_OK. The code used to try to
4026 preserve the sysexits.h value, by assuming that macro definitions were
4027 scanned for macro replacements. I have been disabused of this notion,
4028 so now the code just undefines EX_OK before #including unistd.h.
4030 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4031 in the smtp transport. When a block could not be written in a single
4032 write() function, the timeout was being re-applied to each part-write.
4033 This seems wrong - if the receiver was accepting one byte at a time it
4034 would take for ever. The timeout is now adjusted when this happens. It
4035 doesn't have to be particularly precise.
4037 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4038 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4040 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4041 without a domain if the check to <postmaster@domain> fails.
4043 SC/01 Eximstats: added -xls and the ability to specify output files
4044 (patch written by Frank Heydlauf).
4046 SC/02 Eximstats: use FileHandles for outputting results.
4048 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4050 SC/04 Eximstats: fixed display of large numbers with -nvr option
4052 SC/05 Eximstats: fixed merging of reports with empty tables.
4054 SC/06 Eximstats: added the -include_original_destination flag
4056 SC/07 Eximstats: removed tabs and trailing whitespace.
4058 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4060 TK/06 MBOX spool code: Add real "From " MBOX separator line
4061 so the .eml file is really in mbox format (even though
4062 most programs do not really care). Patch from Alex Miller.
4064 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4065 The latter is generated from $received_to and is only set if the
4066 message has one envelope recipient. SA can use these headers,
4067 obviously out-of-the-box. Patch from Alex Miller.
4069 PH/08 The ${def test on a variable was returning false if the variable's
4070 value was "0", contrary to what the specification has always said!
4071 The result should be true unless the variable is empty.
4073 PH/09 The syntax error of a character other than { following "${if
4074 def:variable_name" (after optional whitespace) was not being diagnosed.
4075 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4076 accidental colon was present, for example, could give incorrect results.
4078 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4079 result is used (not including appendfile, where other changes are about
4082 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4083 This involved changing a lot of size variables from int to off_t. It
4084 should work with maildirs and everything.
4086 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4087 spamd dying while we are connected to it.
4089 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4092 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4093 function for BDB 4.3.
4095 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4097 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4098 the sources for PCRE have been re-arranged and more files are now
4101 PH/15 The code I had for printing potentially long long variables in PH/11
4102 above was not the best (it lost precision). The length of off_t variables
4103 is now inspected at build time, and an appropriate printing format (%ld
4104 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4105 to be "long long int" or "long int". This is needed for the internal
4106 formatting function string_vformat().
4108 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4109 the configuration file to be ":syslog", then the script "guesses" where
4110 the logs files are, rather than using the compiled in default. In our
4111 case the guess is not the same as the compiled default, so the script
4112 suddenly stopped working when I started to use syslog. The patch checks
4113 to see if log_file_path is "". If so, it attempts to read it from exim
4114 with no configuration file to get the compiled in version, before it
4115 falls back to the previous guessing code."
4117 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4118 implementing BATV in an Exim configuration. See NewStuff for the gory
4121 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4122 Makefile that are specific to HP-UX.
4124 PH/18 If the "use_postmaster" option was set for a recipient callout together
4125 with the "random" option, the postmaster address was used as the MAIL
4126 FROM address for the random test, but not for the subsequent recipient
4127 test. It is now used for both.
4129 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4130 patch removes a few documentation additions to RFC 3028, because the
4131 latest draft now contains them. It adds the new en;ascii-case comparator
4132 and a new error check for 8bit text in MIME parts. Comparator and
4133 require names are now matched exactly. I enabled the subaddress
4134 extension, but it is not well tested yet (read: it works for me)."
4136 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4137 rework some of the code of TK/09 above to avoid the hardwired use of
4138 "%lld" and "long long". Replaced the call to snprintf() with a call to
4141 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4142 records point to non-existent hosts", "retry timeout exceeded", and
4143 "retry time not reached for any host after a long failure period".
4145 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4146 experimental DomainKeys support:
4148 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4149 (2) On an error such as an illegally used "control", the wrong name for
4150 the control was given.
4152 These problems did NOT occur unless DomainKeys support was compiled.
4154 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4156 PH/24 Added ${if match_ip condition.
4158 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4159 databases so that it will be absolutely obvious if a crash occurs in the
4160 DB library. This is a regular occurrence (often caused by mis-matched
4163 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4164 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4165 picked up on a user's system that detects such things. There doesn't seem
4166 to be a gcc warning option for this - only an attribute that has to be
4167 put on the function's prototype. It seems that in Fedora Core 4 they have
4168 set this on a number of new functions. No doubt there will be more in due
4171 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4172 specify a transport. However, if an address that was verified by such a
4173 router was the subject of a callout, Exim crashed because it tried to
4174 read the rcpt_include_affixes from the non-existent transport. Now it
4175 just assumes that the setting of that option is false. This bug was
4176 introduced by 4.51/PH/31.
4178 PH/28 Changed -d+all to exclude +memory, because that information is very
4179 rarely of interest, but it makes the output a lot bigger. People tend to
4180 do -d+all out of habit.
4182 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4183 code in os-type was giving problems when libc.so lives in lib64, like on
4186 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4187 aren't the modern standard, and it seems that some systems' include files
4188 don't always have them. Exim was already checking for some of the newer
4189 ones like T_AAAA, and defining it itself. I've added checks for all the
4190 record types that Exim uses.
4192 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4193 not automatically generating a new one, as it is supposed to. This
4194 prevented TLS from working. If the file did exist, but contained invalid
4195 data, a new version was generated, as expected. It was only the case of a
4196 non-existent file that was broken.
4198 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4199 with a change in libdomainkeys > 0.64.
4201 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4202 from DNS. If the selector record carries the flag, it now has
4203 precedence over the domain-wide flag.
4205 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4207 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4208 the use of a port name that isn't defined in /etc/services) occurred, the
4209 message was deferred as in a normal delivery, and thus remained on the
4210 spool, instead of being failed because of the mua_wrapper setting. This
4211 is now fixed, and I tidied up some of the mua_wrapper messages at the
4214 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4215 the messages in a hash of arrays rather than using individual hashes.
4216 This is a bit cleaner and results in dramatic memory savings, albeit
4217 at a slight CPU cost.
4219 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4220 as requested by Marc Sherman.
4222 SC/10 Eximstats: added histograms for user specified patterns as requested
4225 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4227 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4228 fopen() in the content-scanning modules that did not already have it.
4234 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4235 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4237 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4239 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4241 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4242 to test Sieve filters that use "vacation".
4244 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4245 that changes the way the GnuTLS parameters are stored in the cache file.
4246 The new format can be generated externally. For backward compatibility,
4247 if the data in the cache doesn't make sense, Exim assumes it has read an
4248 old-format file, and it generates new data and writes a new file. This
4249 means that you can't go back to an older release without removing the
4252 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4253 work if there are any delivery delays because "one_time" forces the
4254 parent to be marked "delivered", so its unseen clone is never tried
4255 again. For this reason, Exim now forbids the simultaneous setting of
4258 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4259 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4260 entry if you want to know the details. The fix, however, neglected to
4261 consider the case when local delivery batching is involved. The test for
4262 "previously delivered" was not happening when checking to see if an
4263 address could be batched with a previous (undelivered) one; under
4264 certain circumstances this could lead to multiple deliveries to the same
4267 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4268 in its include files, and this causes problems building Exim.
4270 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4271 header_syntax) but Exim was just ignoring anything given after a slash.
4272 In particular, this caused confusion with an attempt to use "verify =
4273 reverse_host_lookup/defer_ok". An error is now given when options are
4274 supplied for verify items that do not have them. (Maybe reverse_host_
4275 lookup should have a defer_ok option, but that's a different point.)
4277 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4278 defined by RFC 821) to 2048, because there were problems with some AUTH
4279 commands, and RFC 1869 says the size should be increased for extended
4280 SMTP commands that take arguments.
4282 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4285 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4286 "unknown" error; now it says that the functionality isn't in the binary.
4288 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4289 an address' error message when a string expansion fails (syntax or
4290 whatever). Otherwise the password may appear in the log. Following change
4291 PH/42 below, there is no longer a chance of it appearing in a bounce
4294 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4296 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4297 of its addresses was ever tried. (Bugzilla bug #2.)
4299 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4300 the result incorrectly in the debug output. (It correctly added a newline
4301 to what was transported.)
4303 TF/01 Added $received_time.
4305 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4306 commented out examples of how to interface to a virus scanner and to
4307 SpamAssassin. Also added commented examples of av_scanner and
4308 spamd_address settings.
4310 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4311 and controls are allowed in which ACLs. There were a couple of minor
4312 errors. Some of the entries in the conditions table (which is a table of
4313 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4314 negation of where the condition IS allowed.
4316 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4318 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4319 header file does not have a version number, so I've had to invent a new
4320 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4321 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4322 radiusclient), but it was contributed by a Radius user.
4324 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4325 files or directories, for OpenSSL.
4327 PH/19 When an Exim process that is running as root has to create an Exim log
4328 file, it does so in a subprocess that runs as exim:exim so as to get the
4329 ownership right at creation (otherwise, other Exim processes might see
4330 the file with the wrong ownership). There was no test for failure of this
4331 fork() call, which would lead to the process getting stuck as it waited
4332 for a non-existent subprocess. Forks do occasionally fail when resources
4333 run out. I reviewed all the other calls to fork(); they all seem to check
4336 PH/20 When checking for unexpected SMTP input at connect time (before writing
4337 the banner), Exim was not dealing correctly with a non-positive return
4338 from the read() function. If the client had disconnected by this time,
4339 the result was a log entry for a synchronization error with an empty
4340 string after "input=" when read() returned zero. If read() returned -1
4341 (an event I could not check), uninitialized data bytes were printed.
4342 There were reports of junk text (parts of files, etc) appearing after
4345 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4347 PH/22 Added support for macro redefinition, and (re)definition in between
4348 driver and ACL definitions.
4350 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4351 forgetting to use the resulting value; it was using the unexpanded value.
4353 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4354 hadn't been configured. The fix is from Juergen Kreileder, who
4355 understands it better than I do:
4357 "Here's what I see happening with three configured cyrus_sasl
4358 authenticators configured (plain, login, cram-md5):
4360 On startup auth_cyrus_sasl_init() gets called for each of these.
4361 This means three calls to sasl_listmech() without a specified mech_list.
4362 => SASL tests which mechs of all available mechs actually work
4363 => three warnings about OTP not working
4364 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4366 With the patch, sasl_listmech() also gets called three times. But now
4367 SASL's mech_list option is set to the server_mech specified in the the
4368 authenticator. Or in other words, the answer from sasl_listmech()
4369 gets limited to just the mech you're testing for (which is different
4371 => the return list contains just 'plain' or 'login', 'cram-md5' or
4372 nothing depending on the value of ob->server_mech.
4374 I've just tested the patch: Authentication still works fine,
4375 unavailable mechs specified in the exim configuration are still
4376 caught, and the auth.log warnings about OTP are gone."
4378 PH/25 When debugging is enabled, the contents of the command line are added
4379 to the debugging output, even when log_selector=+arguments is not
4382 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4383 answer is "GNU", and only if the return is "GNU/something" is the answer
4386 PH/27 $acl_verify_message is now set immediately after the failure of a
4387 verification in an ACL, and so is available in subsequent modifiers. In
4388 particular, the message can be preserved by coding like this:
4390 warn !verify = sender
4391 set acl_m0 = $acl_verify_message
4393 Previously, $acl_verify_message was set only while expanding "message"
4394 and "log_message" when a very denied access.
4396 PH/28 Modified OS/os.c-Linux with
4398 -#ifndef OS_LOAD_AVERAGE
4399 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4401 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4402 nomenclature these days.)
4404 PH/29 Installed patch from the Sieve maintainer that adds the options
4405 sieve_useraddress and sieve_subaddress to the redirect router.
4407 PH/30 In these circumstances:
4408 . Two addresses routed to the same list of hosts;
4409 . First host does not offer TLS;
4410 . First host accepts first address;
4411 . First host gives temporary error to second address;
4412 . Second host offers TLS and a TLS session is established;
4413 . Second host accepts second address.
4414 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4415 and peerdn, if requested) that were in fact used only for the second
4418 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4419 attention to any local part prefix or suffix that was matched by the
4420 router that accepted the address. It now behaves in the same way as it
4421 does for delivery: the affixes are removed from the local part unless
4422 rcpt_include_affixes is set on the transport.
4424 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4425 timeout during the DATA phase of an incoming message.
4427 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4428 applied a patch sanctioned by the Sieve maintainer.
4430 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4431 the uid or gid is negative. A case of a negative gid caused this to be
4432 noticed. The fix allows for either to be negative.
4434 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4435 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4438 PH/36 The change PH/12 above was broken. Fixed it.
4440 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4441 the grounds that routing the same address twice would always produce the
4442 same answer. This might have been true once, but it is certainly no
4443 longer true now. Routing a child address may depend on the previous
4444 routing that produced that child. Some complicated redirection strategies
4445 went wrong when messages had multiple recipients, and made Exim's
4446 behaviour dependent on the order in which the addresses were given.
4448 I have moved the duplicate checking until after the routing is complete.
4449 Exim scans the addresses that are assigned to local and remote
4450 transports, and removes any duplicates. This means that more work will be
4451 done, as duplicates will always all be routed, but duplicates are
4452 presumably rare, so I don't expect this is of any significance.
4454 For deliveries to pipes, files, and autoreplies, the duplicate checking
4455 still happens during the routing process, since they are not going to be
4458 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4459 It corrects a timeout issue with spamd. This is Ian's comment: "The
4460 background is that sometimes spamd either never reads data from a
4461 connection it has accepted, or it never writes response data. The exiscan
4462 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4463 blindly assumes that writes won't block so it may never time out."
4465 PH/39 Allow G after quota size as well as K and M.
4467 PH/40 The value set for $authenticated_id in an authenticator may not contain
4468 binary zeroes or newlines because the value is written to log lines and
4469 to spool files. There was no check on this. Now the value is run through
4470 the string_printing() function so that such characters are converted to
4471 printable escape sequences.
4473 PH/41 $message_linecount is a new variable that contains the total number of
4474 lines in the message. Compare $body_linecount, which is the count for the
4477 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4478 bounce and delay warning messages, except in certain special cases, which
4481 (a) An SMTP error message from a remote host;
4482 (b) A message specified in a :fail: redirection;
4483 (c) A message specified in a "fail" command in a system filter;
4484 (d) A message specified in a FAIL return from the queryprogram router;
4485 (e) A message specified by the cannot_route_message router option.
4487 In these cases only, Exim does include the error details in bounce and
4488 warning messages. There are also a few cases where bland messages such
4489 as "unrouteable address" or "local delivery error" are given.
4491 PH/43 $value is now also set for the "else" part of a ${run expansion.
4493 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4494 being worked on, but at least Exim now implements the latest version to
4497 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4498 process to complete was treated as a delivery failure, a timeout while
4499 writing the message to the pipe was logged, but erroneously treated as a
4500 successful delivery. Such timeouts include transport filter timeouts. For
4501 consistency with the overall process timeout, these timeouts are now
4502 treated as errors, giving rise to delivery failures by default. However,
4503 there is now a new Boolean option for the pipe transport called
4504 timeout_defer, which, if set TRUE, converts the failures into defers for
4505 both kinds of timeout. A transport filter timeout is now identified in
4508 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4509 systems where "make" and "gmake" are different, calling "gmake" at top
4510 level broke things. I've arranged for the value of $(MAKE) to be passed
4511 from the Makefile to this script so that it can call the same version of
4515 A note about Exim versions 4.44 and 4.50
4516 ----------------------------------------
4518 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4519 changes of various kinds. As a consequence, a big documentation update was
4520 needed. This delayed the release for rather longer than seemed good, especially
4521 in the light of a couple of (minor) security issues. Therefore, the changes
4522 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4523 release. So 4.44 and 4.50 are in effect two different branches that both start
4526 I have left the 4.50 change log unchanged; it contains all the changes since
4527 4.43. The change log for 4.44 is below; many of its items are identical to
4528 those for 4.50. This seems to be the most sensible way to preserve the
4529 historical information.
4535 1. Minor wording change to the doc/README.SIEVE file.
4537 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4538 computation of the current number of files was incorrect.
4540 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4541 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4544 4. Give more explanation in the error message when the command for a transport
4545 filter fails to execute.
4547 5. There are several places where Exim runs a non-Exim command in a
4548 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4549 was being done only for the command run by the queryprogram router. It is
4550 now done for all such subprocesses. The other cases are: ${run, transport
4551 filters, and the commands run by the lmtp and pipe transports.
4553 6. Added CONFIGURE_GROUP build-time option.
4555 7. Some older OS have a limit of 256 on the maximum number of file
4556 descriptors. Exim was using setrlimit() to set 1000 as a large value
4557 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4558 systems. I've change it so that if it can't get 1000, it tries for 256.
4560 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4561 was an oversight, and furthermore, ever since the addition of extra
4562 controls (e.g. 4.43/32), the checks on when to allow different forms of
4563 "control" were broken. There should now be diagnostics for all cases when a
4564 control that does not make sense is encountered.
4566 9. Added the /retain_sender option to "control=submission".
4568 10. $recipients is now available in the predata ACL (oversight).
4570 11. Tidy the search cache before the fork to do a delivery from a message
4571 received from the command line. Otherwise the child will trigger a lookup
4572 failure and thereby defer the delivery if it tries to use (for example) a
4573 cached ldap connection that the parent has called unbind on.
4575 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4576 of $address_data from the recipient verification was clobbered by the
4577 sender verification.
4579 13. The value of address_data from a sender verification is now available in
4580 $sender_address_data in subsequent conditions in the ACL statement.
4582 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4584 15. Added a new option "connect=<time>" to callout options, to set a different
4587 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4588 was its contents. (It was OK if the option was not defined at all.)
4590 17. A "Completed" log line is now written for messages that are removed from
4591 the spool by the -Mrm option.
4593 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4594 information about exactly what failed.
4596 19. Added -dd to debug only the daemon process.
4598 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4599 handles timeouts, both on the server side and network timeouts. Renamed the
4600 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4602 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4603 It is now set to "smtps".
4605 22. $host_address is now set to the target address during the checking of
4606 ignore_target_hosts.
4608 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4609 being passed; this would have caused $sender_host_name to have been used if
4610 matching the list had actually called for a host name (not very likely,
4611 since this list is usually IP addresses). A host name is now passed as
4614 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4615 code that specifies a non-restarting handler (typically sigaction() in
4616 modern systems) in an attempt to fix a rare and obscure crash bug.
4618 25. Narrowed the window for a race in the daemon that could cause it to ignore
4619 SIGCHLD signals. This is not a major problem, because they are used only to
4620 wake it up if nothing else does.
4622 26. A malformed maildirsize file could cause Exim to calculate negative values
4623 for the mailbox size or file count. Odd effects could occur as a result.
4624 The maildirsize information is now recalculated if the size or filecount
4627 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4628 support for a long time. Removed HAVE_SYS_VFS_H.
4630 28. Installed the latest version of exipick from John Jetmore.
4632 29. In an address list, if the pattern was not a regular expression, an empty
4633 subject address (from a bounce message) matched only if the pattern was an
4634 empty string. Non-empty patterns were not even tested. This was the wrong
4635 because it is perfectly reasonable to use an empty address as part of a
4636 database query. An empty address is now tested by patterns that are
4637 lookups. However, all the other forms of pattern expect the subject to
4638 contain a local part and a domain, and therefore, for them, an empty
4639 address still always fails if the pattern is not itself empty.
4641 30. Exim went into a mad DNS loop when attempting to do a callout where the
4642 host was specified on an smtp transport, and looking it up yielded more
4643 than one IP address.
4645 31. Re-factored the code for checking spool and log partition space into a
4646 function that finds that data and another that does the check. The former
4647 is then used to implement four new variables: $spool_space, $log_space,
4648 $spool_inodes, and $log_inodes.
4650 32. The RFC2047 encoding function was originally intended for short strings
4651 such as real names; it was not keeping to the 75-character limit for
4652 encoded words that the RFC imposes. It now respects the limit, and
4653 generates multiple encoded words if necessary. To be on the safe side, I
4654 have increased the buffer size for the ${rfc2047: expansion operator from
4657 33. It is now permitted to omit both strings after an "if" condition; if the
4658 condition is true, the result is "true". As before, when the second string
4659 is omitted, a false condition yields an empty string. This makes it less
4660 cumbersome to write custom ACL and router conditions.
4662 34. Failure to deliver a bounce message always caused it to be frozen, even if
4663 there was an errors_to setting on the router. The errors_to setting is now
4666 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4667 canonical form (fully expanded) before being placed in
4668 $sender_host_address.
4670 36. The table in the code that translates DNS record types into text (T_A to
4671 "A" for instance) was missing entries for NS and CNAME. It is just possible
4672 that this could have caused confusion if both these types were looked up
4673 for the same domain, because the text type is used as part of Exim's
4674 per-process caching. But the chance of anyone hitting this buglet seems
4677 37. The dnsdb lookup has been extended in a number of ways.
4679 (1) There is a new type, "zns", which walks up the domain tree until it
4680 finds some nameserver records. It should be used with care.
4682 (2) There is a new type, "mxh", which is like "mx" except that it returns
4683 just the host names, not the priorities.
4685 (3) It is now possible to give a list of domains (or IP addresses) to be
4686 looked up. The behaviour when one of the lookups defers can be
4687 controlled by a keyword.
4689 (4) It is now possible to specify the separator character for use when
4690 multiple records are returned.
4692 38. The dnslists ACL condition has been extended: it is now possible to supply
4693 a list of IP addresses and/or domains to be looked up in a particular DNS
4696 39. Added log_selector=+queue_time_overall.
4698 40. When running the queue in the test harness, wait just a tad after forking a
4699 delivery process, to get repeatability of debugging output.
4701 41. Include certificate and key file names in error message when GnuTLS fails
4702 to set them up, because the GnuTLS error message doesn't include the name
4703 of the failing file when there is a problem reading it.
4705 42. Allow both -bf and -bF in the same test run.
4707 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4709 44. The "Exiscan patch" is now merged into the mainline Exim source.
4711 45. Sometimes the final signoff response after QUIT could fail to get
4712 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4713 < 0 before doing a fflush(). This bug looks as though it goes back to the
4714 introduction of TLS in release 3.20, but "sometimes" must have been rare
4715 because the tests only now provoked it.
4717 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4718 (this can affect the format of dates).
4720 47. exim_tidydb, when checking for the continued existence of a message for
4721 which it has found a message-specific retry record, was not finding
4722 messages that were in split spool directories. Consequently, it was
4723 deleting retry records that should have stayed in existence.
4725 48. Steve fixed some bugs in eximstats.
4727 49. The SPA authentication driver was not abandoning authentication and moving
4728 on to the next authenticator when an expansion was forced to fail,
4729 contradicting the general specification for all authenticators. Instead it
4730 was generating a temporary error. It now behaves as specified.
4732 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4733 (the order specifies the preference for clients). The order is now AES256,
4734 AES128, 3DES, ARCFOUR128.
4736 51. Small patch to Sieve code - explicitly set From: when generating an
4739 52. Exim crashed if a remote delivery caused a very long error message to be
4740 recorded - for instance if somebody sent an entire SpamAssassin report back
4741 as a large number of 550 error lines. This bug was coincidentally fixed by
4742 increasing the size of one of Exim's internal buffers (big_buffer) that
4743 happened as part of the Exiscan merge. However, to be on the safe side, I
4744 have made the code more robust (and fixed the comments that describe what
4747 53. Now that there can be additional text after "Completed" in log lines (if
4748 the queue_time_overall log selector is set), a one-byte patch to exigrep
4749 was needed to allow it to recognize "Completed" as not the last thing in
4752 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4753 patch that reportedly fixes this has been added. I am not expert enough to
4754 create a test for it. This is what the patch creator wrote:
4756 "I found a little strange behaviour of ldap code when working with
4757 Windows 2003 AD Domain, where users was placed in more than one
4758 Organization Units. When I tried to give exim partial DN, the exit code
4759 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4760 But simultaneously result of request was absolutely normal ldap result,
4761 so I produce this patch..."
4763 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4764 REFERENCE, so I have modified the code to exclude the patch when that macro
4767 55. Some experimental protocols are using DNS PTR records for new purposes. The
4768 keys for these records are domain names, not reversed IP addresses. The
4769 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4770 leaves it alone. Component reversal etc. now happens only for IP addresses.
4773 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4775 57. Double the size of the debug message buffer (to 2048) so that more of very
4776 long debug lines gets shown.
4778 58. The exicyclog utility now does better if the number of log files to keep
4779 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4781 59. Two changes related to the smtp_active_hostname option:
4783 (1) $smtp_active_hostname is now available as a variable.
4784 (2) The default for smtp_banner uses $smtp_active_hostname instead
4785 of $primary_hostname.
4787 60. The host_aton() function is supposed to be passed a string that is known
4788 to be a valid IP address. However, in the case of IPv6 addresses, it was
4789 not checking this. This is a hostage to fortune. Exim now panics and dies
4790 if the condition is not met. A case was found where this could be provoked
4791 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4792 components; fortuitously, this particular loophole had already been fixed
4793 by change 4.50/55 above.
4795 If there are any other similar loopholes, the new check in host_aton()
4796 itself should stop them being exploited. The report I received stated that
4797 data on the command line could provoke the exploit when Exim was running as
4798 exim, but did not say which command line option was involved. All I could
4799 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4800 running as the user.
4803 61. There was a buffer overflow vulnerability in the SPA authentication code
4804 (which came originally from the Samba project). I have added a test to the
4805 spa_base64_to_bits() function which I hope fixes it.
4808 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4809 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4811 63. The daemon start-up calls getloadavg() while still root for those OS that
4812 need the first call to be done as root, but it missed one case: when
4813 deliver_queue_load_max is set with deliver_drop_privilege. This is
4814 necessary for the benefit of the queue runner, because there is no re-exec
4815 when deliver_drop_privilege is set.
4817 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4818 This has been fixed.
4820 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4821 was in use, was not putting the data itself into the right store pool;
4822 consequently, it could be overwritten for a subsequent message in the same
4823 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4826 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4828 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4829 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4830 the function were treating the return as a boolean value, which happened to
4831 work because 0=false and not-0=true, but is not correct code.
4833 68. The host_aton() function was not handling scoped IPv6 addresses (those
4834 with, for example, "%eth0" on the end) correctly.
4836 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4837 negated items (that is, ~something) in unsigned ints. Some compilers
4838 apparently mutter when there is no cast.
4840 70. If an address verification called from an ACL failed, and did not produce a
4841 user-specific message (i.e. there was only a "system" message), nothing was
4842 put in $acl_verify_message. In this situation, it now puts the system
4845 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4846 session; change 4.31/43 added the unwanted input to the log line - except
4847 that it did not do this in the start of session case. It now does.
4849 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4850 This is wrong and can cause the other end to generate a synchronization
4851 error if it is another Exim or anything else that does the synchronization
4852 check. A QUIT command is no longer sent after a timeout.
4854 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4855 during host lookups.
4857 74. The defer_ok option of callout verification was not working if it was used
4858 when verifying addresses in header lines, that is, for this case:
4860 verify = header_sender/callout=defer_ok
4862 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4863 those file descriptors could be used for SMTP connections. If anything
4864 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4865 could be sent to the SMTP client, causing chaos. The daemon now opens
4866 stdin, stdout, and stderr to /dev/null when it puts itself into the
4869 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4870 log by default. The user can override this with suitable Perl magic.
4872 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4873 the log message when discard triggers, was not working for the DATA ACL or
4874 for the non-SMTP ACL.
4876 78. Error message wording change in sieve.c.
4878 79. If smtp_accept_max_per_host was set, the number of connections could be
4879 restricted to fewer than expected, because the daemon was trying to set up
4880 a new connection before checking whether the processes handling previous
4881 connections had finished. The check for completed processes is now done
4882 earlier. On busy systems, this bug wouldn't be noticed because something
4883 else would have woken the daemon, and it would have reaped the completed
4886 80. If a message was submitted locally by a user whose login name contained one
4887 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4888 It caused a spool format error. I have fixed the spool reading code. A
4889 related problem was that the "from" clause in the Received: line became
4890 illegal because of the space(s). It is now covered by ${quote_local_part.
4892 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4895 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4897 83. Patch from Sieve maintainer to fix unterminated string problem in
4898 "vacation" handling.
4900 84. Some minor changes to the Linux configuration files to help with other
4901 OS variants using glibc.
4903 85. One more patch for Sieve to update vacation handling to latest spec.
4906 ----------------------------------------------------
4907 See the note above about the 4.44 and 4.50 releases.
4908 ----------------------------------------------------
4914 1. Change 4.43/35 introduced a bug that caused file counts to be
4915 incorrectly computed when quota_filecount was set in an appendfile
4918 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4919 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4922 3. Give more explanation in the error message when the command for a transport
4923 filter fails to execute.
4925 4. There are several places where Exim runs a non-Exim command in a
4926 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4927 was being done only for the command run by the queryprogram router. It is
4928 now done for all such subprocesses. The other cases are: ${run, transport
4929 filters, and the commands run by the lmtp and pipe transports.
4931 5. Some older OS have a limit of 256 on the maximum number of file
4932 descriptors. Exim was using setrlimit() to set 1000 as a large value
4933 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4934 systems. I've change it so that if it can't get 1000, it tries for 256.
4936 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4937 was an oversight, and furthermore, ever since the addition of extra
4938 controls (e.g. 4.43/32), the checks on when to allow different forms of
4939 "control" were broken. There should now be diagnostics for all cases when a
4940 control that does not make sense is encountered.
4942 7. $recipients is now available in the predata ACL (oversight).
4944 8. Tidy the search cache before the fork to do a delivery from a message
4945 received from the command line. Otherwise the child will trigger a lookup
4946 failure and thereby defer the delivery if it tries to use (for example) a
4947 cached ldap connection that the parent has called unbind on.
4949 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4950 of $address_data from the recipient verification was clobbered by the
4951 sender verification.
4953 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4954 was its contents. (It was OK if the option was not defined at all.)
4956 11. A "Completed" log line is now written for messages that are removed from
4957 the spool by the -Mrm option.
4959 12. $host_address is now set to the target address during the checking of
4960 ignore_target_hosts.
4962 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4963 being passed; this would have caused $sender_host_name to have been used if
4964 matching the list had actually called for a host name (not very likely,
4965 since this list is usually IP addresses). A host name is now passed as
4968 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4969 code that specifies a non-restarting handler (typically sigaction() in
4970 modern systems) in an attempt to fix a rare and obscure crash bug.
4972 15. Narrowed the window for a race in the daemon that could cause it to ignore
4973 SIGCHLD signals. This is not a major problem, because they are used only to
4974 wake it up if nothing else does.
4976 16. A malformed maildirsize file could cause Exim to calculate negative values
4977 for the mailbox size or file count. Odd effects could occur as a result.
4978 The maildirsize information is now recalculated if the size or filecount
4981 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4982 support for a long time. Removed HAVE_SYS_VFS_H.
4984 18. Updated exipick to current release from John Jetmore.
4986 19. Allow an empty sender to be matched against a lookup in an address list.
4987 Previously the only cases considered were a regular expression, or an
4990 20. Exim went into a mad DNS lookup loop when doing a callout where the
4991 host was specified on the transport, if the DNS lookup yielded more than
4994 21. The RFC2047 encoding function was originally intended for short strings
4995 such as real names; it was not keeping to the 75-character limit for
4996 encoded words that the RFC imposes. It now respects the limit, and
4997 generates multiple encoded words if necessary. To be on the safe side, I
4998 have increased the buffer size for the ${rfc2047: expansion operator from
5001 22. Failure to deliver a bounce message always caused it to be frozen, even if
5002 there was an errors_to setting on the router. The errors_to setting is now
5005 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5006 canonical form (fully expanded) before being placed in
5007 $sender_host_address.
5009 24. Updated eximstats to version 1.33
5011 25. Include certificate and key file names in error message when GnuTLS fails
5012 to set them up, because the GnuTLS error message doesn't include the name
5013 of the failing file when there is a problem reading it.
5015 26. Expand error message when OpenSSL has problems setting up cert/key files.
5018 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5019 (this can affect the format of dates).
5021 28. exim_tidydb, when checking for the continued existence of a message for
5022 which it has found a message-specific retry record, was not finding
5023 messages that were in split spool directories. Consequently, it was
5024 deleting retry records that should have stayed in existence.
5026 29. eximstats updated to version 1.35
5027 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5028 1.35 - bugfix such that pie charts by volume are generated correctly
5030 30. The SPA authentication driver was not abandoning authentication and moving
5031 on to the next authenticator when an expansion was forced to fail,
5032 contradicting the general specification for all authenticators. Instead it
5033 was generating a temporary error. It now behaves as specified.
5035 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5036 (the order specifies the preference for clients). The order is now AES256,
5037 AES128, 3DES, ARCFOUR128.
5039 31. Small patch to Sieve code - explicitly set From: when generating an
5042 32. Exim crashed if a remote delivery caused a very long error message to be
5043 recorded - for instance if somebody sent an entire SpamAssassin report back
5044 as a large number of 550 error lines. This bug was coincidentally fixed by
5045 increasing the size of one of Exim's internal buffers (big_buffer) that
5046 happened as part of the Exiscan merge. However, to be on the safe side, I
5047 have made the code more robust (and fixed the comments that describe what
5050 33. Some experimental protocols are using DNS PTR records for new purposes. The
5051 keys for these records are domain names, not reversed IP addresses. The
5052 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5053 leaves it alone. Component reversal etc. now happens only for IP addresses.
5056 34. The host_aton() function is supposed to be passed a string that is known
5057 to be a valid IP address. However, in the case of IPv6 addresses, it was
5058 not checking this. This is a hostage to fortune. Exim now panics and dies
5059 if the condition is not met. A case was found where this could be provoked
5060 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5061 components; fortuitously, this particular loophole had already been fixed
5062 by change 4.50/55 or 4.44/33 above.
5064 If there are any other similar loopholes, the new check in host_aton()
5065 itself should stop them being exploited. The report I received stated that
5066 data on the command line could provoke the exploit when Exim was running as
5067 exim, but did not say which command line option was involved. All I could
5068 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5069 running as the user.
5072 35. There was a buffer overflow vulnerability in the SPA authentication code
5073 (which came originally from the Samba project). I have added a test to the
5074 spa_base64_to_bits() function which I hope fixes it.
5077 36. The daemon start-up calls getloadavg() while still root for those OS that
5078 need the first call to be done as root, but it missed one case: when
5079 deliver_queue_load_max is set with deliver_drop_privilege. This is
5080 necessary for the benefit of the queue runner, because there is no re-exec
5081 when deliver_drop_privilege is set.
5083 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5084 was in use, was not putting the data itself into the right store pool;
5085 consequently, it could be overwritten for a subsequent message in the same
5086 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5089 38. Sometimes the final signoff response after QUIT could fail to get
5090 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5091 < 0 before doing a fflush(). This bug looks as though it goes back to the
5092 introduction of TLS in release 3.20, but "sometimes" must have been rare
5093 because the tests only now provoked it.
5099 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5100 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5101 Now it returns an integer. A number of calls were still expecting a T/F
5102 return. Fortuitously, in all cases, the tests worked in OK situations,
5103 which is the norm. However, things would have gone wrong on any write
5104 failures on the smtp file descriptor. This function is used when sending
5105 messages over SMTP and also when doing verify callouts.
5107 2. When Exim is called to do synchronous delivery of a locally submitted
5108 message (the -odf or -odi options), it no longer closes stderr before doing
5111 3. Implemented the mua_wrapper option.
5113 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5115 5. Implemented the functions header_remove(), header_testname(),
5116 header_add_at_position(), and receive_remove_recipient(), and exported them
5119 6. If an ACL "warn" statement specified the addition of headers, Exim already
5120 inserted X-ACL-Warn: at the start if there was no header name. However, it
5121 was not making this test for the second and subsequent header lines if
5122 there were newlines in the string. This meant that an invalid header could
5123 be inserted if Exim was badly configured.
5125 7. Allow an ACL "warn" statement to add header lines at the start or after all
5126 the Received: headers, as well as at the end.
5128 8. Added the rcpt_4xx retry error code.
5130 9. Added postmaster_mailfrom=xxx to callout verification option.
5132 10. Added mailfrom=xxxx to the callout verification option, for verify=
5135 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5136 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5138 12. Inserted some casts to stop certain compilers warning when using pointer
5139 differences as field lengths or precisions in printf-type calls (mostly
5140 affecting debugging statements).
5142 13. Added optional readline() support for -be (dynamically loaded).
5144 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5145 same clock tick as a message's arrival, so that its received time was the
5146 same as the "first fail" time on the retry record, and that message
5147 remained on the queue past the ultimate address timeout, every queue runner
5148 would try a delivery (because it was past the ultimate address timeout) but
5149 after another failure, the ultimate address timeout, which should have then
5150 bounced the address, did not kick in. This was a "< instead of <=" error;
5151 in most cases the first failure would have been in the next clock tick
5152 after the received time, and all would be well.
5154 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5155 being recognized when the domain list was tested by the match_domain
5156 condition in an expansion string.
5158 16. Added the ${str2b64: operator.
5160 17. Exim was always calling setrlimit() to set a large limit for the number of
5161 processes, without checking whether the existing limit was already
5162 adequate. (It did check for the limit on file descriptors.) Furthermore,
5163 errors from getrlimit() and setrlimit() were being ignored. Now they are
5164 logged to the main and panic logs, but Exim does carry on, to try to do its
5165 job under whatever limits there are.
5167 18. Imported PCRE 5.0.
5169 19. Trivial typo in log message " temporarily refused connection" (the leading
5172 20. If the log selector return_path_on_delivery was set and an address was
5173 redirected to /dev/null, the delivery process crashed because it assumed
5174 that a return path would always be set for a "successful" delivery. In this
5175 case, the whole delivery is bypassed as an optimization, and therefore no
5178 21. Internal re-arrangement: the function for sending a challenge and reading
5179 a response while authentication was assuming a zero-terminated challenge
5180 string. It's now changed to take a pointer and a length, to allow for
5181 binary data in such strings.
5183 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5185 23. Exim was not respecting finduser_retries when seeking the login of the
5186 uid under which it was called; it was always trying 10 times. (The default
5187 setting of finduser_retries is zero.) Also, it was sleeping after the final
5188 failure, which is pointless.
5190 24. Implemented tls_on_connect_ports.
5192 25. Implemented acl_smtp_predata.
5194 26. If the domain in control=submission is set empty, Exim assumes that the
5195 authenticated id is a complete email address when it generates From: or
5196 Sender: header lines.
5198 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5199 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5200 chown and chgrp in /bin and hostname in /usr/bin.
5202 28. Exim was keeping the "process log" file open after each use, just as it
5203 does for the main log. This opens the possibility of it remaining open for
5204 long periods when the USR1 signal hits a daemon. Occasional processlog
5205 errors were reported, that could have been caused by this. Anyway, it seems
5206 much more sensible not to leave this file open at all, so that is what now
5209 29. The long-running daemon process does not normally write to the log once it
5210 has entered its main loop, and it closes the log before doing so. This is
5211 so that log files can straightforwardly be renamed and moved. However,
5212 there are a couple of unusual error situations where the daemon does write
5213 log entries, and I had neglected to close the log afterwards.
5215 30. The text of an SMTP error response that was received during a remote
5216 delivery was being truncated at 512 bytes. This is too short for some of
5217 the long messages that one sometimes sees. I've increased the limit to
5220 31. It is now possible to make retry rules that apply only when a message has a
5221 specific sender, in particular, an empty sender.
5223 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5224 it possible to be selective about when SMTP synchronization is enforced.
5226 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5228 32. Implemented hosts_connection_nolog.
5230 33. Added an ACL for QUIT.
5232 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5235 35. Added mailbox_size and mailbox_filecount to appendfile.
5237 36. Added control = no_multiline_responses to ACLs.
5239 37. There was a bug in the logic of the code that waits for the clock to tick
5240 in the case where the clock went backwards by a substantial amount such
5241 that the microsecond fraction of "now" was more than the microsecond
5242 fraction of "then" (but the whole seconds number was less).
5244 38. Added support for the libradius Radius client library this is found on
5245 FreeBSD (previously only the radiusclient library was supported).
5251 1. When certain lookups returned multiple values in the form name=value, the
5252 quoting of the values was not always being done properly. Specifically:
5253 (a) If the value started with a double quote, but contained no whitespace,
5255 (b) If the value contained whitespace other than a space character (i.e.
5256 tabs or newlines or carriage returns) it was not quoted.
5257 This fix has been applied to the mysql and pgsql lookups by writing a
5258 separate quoting function and calling it from the lookup code. The fix
5259 should probably also be applied to nisplus, ibase and oracle lookups, but
5260 since I cannot test any of those, I have not disturbed their existing code.
5262 2. A hit in the callout cache for a specific address caused a log line with no
5263 reason for rejecting RCPT. Now it says "Previous (cached) callout
5264 verification failure".
5266 3. There was an off-by-one bug in the queryprogram router. An over-long
5267 return line was truncated at 256 instead of 255 characters, thereby
5268 overflowing its buffer with the terminating zero. As well as fixing this, I
5269 have increased the buffer size to 1024 (and made a note to document this).
5271 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5272 when Exim is waiting for an SMTP response from a remote server, Exim
5273 restarts its select() call on the socket, thereby resetting its timeout.
5274 This is not a problem when such interrupts are rare. Somebody set up a cron
5275 job to run exiwhat every 2 minutes, which is less than the normal select()
5276 timeout (5 or 10 minutes). This meant that the select() timeout never
5277 kicked in because it was always reset. I have fixed this by comparing the
5278 time when an interrupt arrives with the time at the start of the first call
5279 to select(). If more time than the timeout has elapsed, the interrupt is
5280 treated as a timeout.
5282 5. Some internal re-factoring in preparation for the addition of Sieve
5283 extensions (by MH). In particular, the "personal" test is moved to a
5284 separate function, and given an option for scanning Cc: and Bcc: (which is
5285 not set for Exim filters).
5287 6. When Exim created an email address using the login of the caller as the
5288 local part (e.g. when creating a From: or Sender: header line), it was not
5289 quoting the local part when it contained special characters such as @.
5291 7. Installed new OpenBSD configuration files.
5293 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5294 try to make them clearer.
5296 9. Callout options, other than the timeout value, were being ignored when
5297 verifying sender addresses in header lines. For example, when using
5299 verify = header_sender/callout=no_cache
5301 the cache was (incorrectly) being used.
5303 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5304 only the Cygwin environment.
5306 11. When return_path_on_delivery was set as a log selector, if different remote
5307 addresses in the same message used different return paths and parallel
5308 remote delivery occurred, the wrong values would sometimes be logged.
5309 (Whenever a remote delivery process finished, the return path value from
5310 the most recently started remote delivery process was logged.)
5312 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5313 lines when AUTH and/or TLS are in use. This is the "received protocol"
5314 field. Exim used to use "asmtp" for authenticated SMTP, without any
5315 indication (in the protocol name) for TLS use. Now it follows the RFC and
5316 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5317 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5318 names appear in log lines as well as in Received: header lines.
5320 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5321 extensions, and comparison tests, and to fix some bugs.
5323 14. Changes to the "personal" filter test:
5325 (1) The test was buggy in that it was just doing the equivalent of
5326 "contains" tests on header lines. For example, if a user's address was
5327 anne@some.where, the "personal" test would incorrectly be true for
5329 To: susanne@some.where
5331 This test is now done by extracting each address from the header in turn,
5332 and checking the entire address. Other tests that are part of "personal"
5333 are now done using regular expressions (for example, to check local parts
5334 of addresses in From: header lines).
5336 (2) The list of non-personal local parts in From: addresses has been
5337 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5338 taken from the Sieve specification recommendations.
5340 (3) If the message contains any header line starting with "List-" it is
5341 treated as non-personal.
5343 (4) The test for "circular" in the Subject: header line has been removed
5344 because it now seems ill-conceived.
5346 15. Minor typos in src/EDITME comments corrected.
5348 16. Installed latest exipick from John Jetmore.
5350 17. If headers_add on a router specified a text string that was too long for
5351 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5352 of string_sprintf() is now avoided.
5354 18. $message_body_size was not set (it was always zero) when running the DATA
5355 ACL and the local_scan() function.
5357 19. For the "mail" command in an Exim filter, no default was being set for
5358 the once_repeat time, causing a random time value to be used if "once" was
5359 specified. (If the value happened to be <= 0, no repeat happened.) The
5360 default is now 0s, meaning "never repeat". The "vacation" command was OK
5361 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5362 (I found it when inspecting the code).
5364 20. There is now an overall timeout for performing a callout verification. It
5365 defaults to 4 times the callout timeout, which applies to individual SMTP
5366 commands during the callout. The overall timeout applies when there is more
5367 than one host that can be tried. The timeout is checked before trying the
5368 next host. This prevents very long delays if there are a large number of
5369 hosts and all are timing out (e.g. when the network connections are timing
5370 out). The value of the overall timeout can be changed by specifying an
5371 additional sub-option for "callout", called "maxwait". For example:
5373 verify = sender/callout=5s,maxwait=20s
5375 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5376 to the end before writing, but this should make it even safer).
5378 22. Exim was forgetting that it had advertised PIPELINING for the second and
5379 subsequent messages on an SMTP connection. It was also not resetting its
5380 memory on STARTTLS and an internal HELO.
5382 23. When Exim logs an SMTP synchronization error within a session, it now
5383 records whether PIPELINING has been advertised or not.
5385 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5386 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5387 rather than long int.
5389 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5391 26. Added the never_mail option to autoreply.
5397 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5398 crash if the getsockname() call failed; this can happen if a connection is
5399 closed very soon after it is established. The problem was simply in the
5400 order in which certain operations were done, causing Exim to try to write
5401 to the SMTP stream before it had set up the file descriptor. The bug has
5402 been fixed by making things happen in the correct order.
5408 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5409 before the connection was closed, thus losing the rejection response.
5411 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5412 some early Solaris releases, but causes trouble in current releases where
5413 socklen_t is defined.
5415 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5418 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5421 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5422 that releasing the top of it at the end releases what was used for sub-
5423 expansions (unless the block got too big). However, discard this block if
5424 the first thing is a variable or header, so that we can use its block when
5425 it is dynamic (useful for very large $message_headers, for example).
5427 6. Lookups now cache *every* query, not just the most recent. A new, separate
5428 store pool is used for this. It can be recovered when all lookup caches are
5429 flushed. Lookups now release memory at the end of their result strings.
5430 This has involved some general refactoring of the lookup sources.
5432 7. Some code has been added to the store_xxx() functions to reduce the amount
5433 of flapping under certain conditions.
5435 8. log_incoming_interface used to affect only the <= reception log lines. Now
5436 it causes the local interface and port to be added to several more SMTP log
5437 lines, for example "SMTP connection from", and rejection lines.
5439 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5441 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5443 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5444 could be overwritten at the end of the current message (or the start of a
5445 new message if it was set in a HELO ACL). The value is now preserved for
5446 the duration of the SMTP connection.
5448 12. If a transport had a headers_rewrite setting, and a matching header line
5449 contained an unqualified address, that address was qualified, even if it
5450 did not match any rewriting rules. The underlying bug was that the values
5451 of the flags that permit the existence of unqualified sender and recipient
5452 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5453 non-local messages, and by -bnq for local messages) were not being
5454 preserved with the message after it was received.
5456 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5457 "next input=" as part of the text comprising the host identity instead of
5458 the correct text. The code was using the same buffer for two different
5459 strings. However, depending on which order the printing function evaluated
5460 its arguments, the bug did not always show up. Under Linux, for example, my
5461 test suite worked just fine.
5463 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5464 doesn't work with some older versions of Perl. It has been changed to "my",
5465 which in any case is probably the better facility to use.
5467 15. A really picky compiler found some instances of statements for creating
5468 error messages that either had too many or two few arguments for the format
5471 16. The size of the buffer for calls to the DNS resolver has been increased
5472 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5473 for addresses that have a lot of PTR records. This alleviates a problem; it
5474 does not fully solve it.
5476 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5477 buffer now truncates the list and logs the incident, which is the same
5478 action as happens when Exim is looking up a host name and its aliases.
5479 Previously in this situation something unpredictable would happen;
5480 sometimes it was "internal error: store_reset failed".
5482 18. If a server dropped the connection unexpectedly when an Exim client was
5483 using GnuTLS and trying to read a response, the client delivery process
5484 crashed while trying to generate an error log message.
5486 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5487 string, for example:
5489 warn message = H1: something\nH2: something
5491 the text was added as a single header line from Exim's point of view
5492 though it ended up OK in the delivered message. However, searching for the
5493 second and subsequent header lines using $h_h2: did not work. This has been
5494 fixed. Similarly, if a system filter added multiple headers in this way,
5495 the routers could not see them.
5497 20. Expanded the error message when iplsearch is called with an invalid key to
5498 suggest using net-iplsearch in a host list.
5500 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5501 ACLs are no longer actually imposed (and a message to that effect is
5504 22. If a "gecos" field in a passwd entry contained escaped characters, in
5505 particular, if it contained a \" sequence, Exim got it wrong when building
5506 a From: or a Sender: header from that name. A second bug also caused
5507 incorrect handling when an unquoted " was present following a character
5508 that needed quoting.
5510 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5511 was not being matched caselessly.
5513 24. Arranged for all hyphens in the exim.8 source to be escaped with
5516 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5517 properly. Recipient callout cache records were still being keyed to include
5518 the sender, even when use_sender was set false. This led to far more
5519 callouts that were necessary. The sender is no longer included in the key
5520 when use_sender is false.
5522 26. Added "control = submission" modifier to ACLs.
5524 27. Added the ${base62d: operator to decode base 62 numbers.
5526 28. dnsdb lookups can now access SRV records.
5528 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5529 the configuration file.
5531 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5532 (-v) mode. This makes the output for a verbose queue run more intelligible.
5534 31. Added a use_postmaster feature to recipient callouts.
5536 32. Added the $body_zerocount variable, containing the number of binary zero
5537 bytes in the message body.
5539 33. The time of last modification of the "new" subdirectory is now used as the
5540 "mailbox time last read" when there is a quota error for a maildir
5543 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5545 35. Added +ignore_unknown as a special item in host lists.
5547 36. Code for decoding IPv6 addresses in host lists is now included, even if
5548 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5549 address was recognized as an IP address, but was then not correctly decoded
5550 into binary, causing unexpected and incorrect effects when compared with
5557 1. Very minor rewording of debugging text in manualroute to say "list of
5558 hosts" instead of "hostlist".
5560 2. If verify=header_syntax was set, and a header line with an unqualified
5561 address (no domain) and a large number of spaces between the end of the
5562 name and the colon was received, the reception process suffered a buffer
5563 overflow, and (when I tested it) crashed. This was caused by some obsolete
5564 code that should have been removed. The fix is to remove it!
5566 3. When running in the test harness, delay a bit after writing a bounce
5567 message to get a bit more predictability in the log output.
5569 4. Added a call to search_tidyup() just before forking a reception process. In
5570 theory, someone could use a lookup in the expansion of smtp_accept_max_
5571 per_host which, without the tidyup, could leave open a database connection.
5573 5. Added the variables $recipient_data and $sender_data which get set from a
5574 lookup success in an ACL "recipients" or "senders" condition, or a router
5575 "senders" option, similar to $domain_data and $local_part_data.
5577 6. Moved the writing of debug_print from before to after the "senders" test
5580 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5581 problems for message scanning, either using a data ACL, or using
5582 local_scan() because the Received: header was not generated till after they
5583 were called (in order to set the time as the time of reception completion).
5584 I have revised the way this works. The header is now generated after the
5585 body is received, but before the ACL or local_scan() are called. After they
5586 are run, the timestamp in the header is updated.
5592 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5593 before starting a queue runner without re-exec. This happened only when
5594 deliver_drop_privilege was set or when the Exim user was set to root. The
5595 effect of the bug was that timeouts during subsequent deliveries caused
5596 crashes instead of being properly handled. The handler is now left at its
5597 default (and expected) setting.
5599 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5600 message, again when deliver_drop_privilege is set or Exim is run as root.
5601 The bug described in (1) was not present in this case, but the tidying up
5602 of the other signals was missing. I have made the two cases consistent.
5604 3. The ignore_target_hosts setting on a manualroute router was being ignored
5605 for hosts that were looked up using the /MX notation.
5607 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5610 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5611 operated on the sender address. After changing the $sender_address to <>
5612 for the sender address verify, Exim was re-instated it as the original
5613 (before rewriting) address, but remembering that it had rewritten it, so it
5614 wasn't rewriting it again. This bug also had the effect of breaking the
5615 sender address verification caching when the sender address was rewritten.
5617 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5618 This has been changed so that if the ip literal address matches
5619 ignore_target_hosts, the router declines.
5621 7. Added expansion conditions match_domain, match_address, and match_local_
5622 part (NOT match_host).
5624 8. The placeholder for the Received: header didn't have a length field set.
5626 9. Added code to Exim itself and to exim_lock to test for a specific race
5627 condition that could lead to file corruption when using MBX delivery. The
5628 issue is with the lockfile that is created in /tmp. If this file is removed
5629 after a process has opened it but before that process has acquired a lock,
5630 there is the potential for a second process to recreate the file and also
5631 acquire a lock. This could lead to two Exim processes writing to the file
5632 at the same time. The added code performs the same test as UW imapd; it
5633 checks after acquiring the lock that its file descriptor still refers to
5634 the same named file.
5636 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5637 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5640 11. Added the smtp_active_hostname option. If used, this will typically be made
5641 to depend on the incoming interface address. Because $interface_address is
5642 not set up until the daemon has forked a reception process, error responses
5643 that can happen earlier (such as "too many connections") no longer contain
5646 12. If an expansion in a condition on a "warn" statement fails because a lookup
5647 defers, the "warn" statement is abandoned, and the next ACL statement is
5648 processed. Previously this caused the whole ACL to be aborted.
5650 13. Added the iplsearch lookup type.
5652 14. Added ident_timeout as a log selector.
5654 15. Added tls_certificate_verified as a log selector.
5656 16. Added a global option tls_require_ciphers (compare the smtp transport
5657 option of the same name). This controls incoming TLS connections.
5659 17. I finally figured out how to make tls_require_ciphers do a similar thing
5660 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5661 before starting the TLS session.
5663 18. Tabs are now shown as \t in -bP output.
5665 19. If the log selector return_path_on_delivery was set, Exim crashed when
5666 bouncing a message because it had too many Received: header lines.
5668 20. If two routers both had headers_remove settings, and the first one included
5669 a superfluous trailing colon, the final name in the first list and the
5670 first name in the second list were incorrectly joined into one item (with a
5671 colon in the middle).
5677 1. Added -C and -D options to the exinext utility, mainly to make it easier
5678 to include in the automated testing, but these could be helpful when
5679 multiple configurations are in use.
5681 2. The exinext utility was not formatting the output nicely when there was
5682 an alternate port involved in the retry record key, nor when there was a
5683 message id as well (for retries that were specific to a specific message
5684 and a specific host). It was also confused by IPv6 addresses, because of
5685 the additional colons they contain. I have fixed the IPv4 problem, and
5686 patched it up to do a reasonable job for IPv6.
5688 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5689 delivery, the log line now contains "pipelined" if PIPELINING was used.
5691 4. An SMTP transport process used to panic and die if the bind() call to set
5692 an explicit outgoing interface failed. This has been changed; it is now
5693 treated in the same way as a connect() failure.
5695 5. A reference to $sender_host_name in the part of a conditional expansion
5696 that was being skipped was still causing a DNS lookup. This no longer
5699 6. The def: expansion condition was not recognizing references to header lines
5700 that used bh_ and bheader_.
5702 7. Added the _cache feature to named lists.
5704 8. The code for checking quota_filecount in the appendfile transport was
5705 allowing one more file than it should have been.
5707 9. For compatibility with Sendmail, the command line option
5715 and sets the incoming protocol and host name (for trusted callers). The
5716 host name and its colon can be omitted when only the protocol is to be set.
5717 Note the Exim already has two private options, -pd and -ps, that refer to
5718 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5719 "s", but I don't think that's a major issue.
5721 10. A number of refactoring changes to the code, none of which should affect
5724 (a) The number of logging options was getting close to filling up the
5725 32-bit word that was used as a bit map. I have split them into two classes:
5726 those that are passed in the argument to log_write(), and those that are
5727 only ever tested independently outside of that function. These are now in
5728 separate 32-bit words, so there is plenty of room for expansion again.
5729 There is no change in the user interface or the logging behaviour.
5731 (b) When building, for example, log lines, the code previously used a
5732 macro that called string_cat() twice, in order to add two strings. This is
5733 not really sufficiently general. Furthermore, there was one instance where
5734 it was actually wrong because one of the argument was used twice, and in
5735 one call a function was used. (As it happened, calling the function twice
5736 did not affect the overall behaviour.) The macro has been replaced by a
5737 function that can join an arbitrary number of extra strings onto a growing
5740 (c) The code for expansion conditions now uses a table and a binary chop
5741 instead of a serial search (which was left over from when there were very
5742 few conditions). Also, it now recognizes conditions like "pam" even when
5743 the relevant support is not compiled in: a suitably worded error message is
5744 given if an attempt is made to use such a condition.
5746 11. Added ${time_interval:xxxxx}.
5748 12. A bug was causing one of the ddress fields not to be passed back correctly
5749 from remote delivery subprocesses. The field in question was not being
5750 subsequently used, so this caused to problems in practice.
5752 13. Added new log selectors queue_time and deliver_time.
5754 14. Might have fixed a bug in maildirsizefile handling that threw up
5755 "unexpected character" debug warnings, and recalculated the data
5756 unnecessarily. In any case, I expanded the warning message to give more
5759 15. Added the message "Restricted characters in address" to the statements in
5760 the default ACL that block characters like @ and % in local parts.
5762 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5763 Three changes have been made:
5765 (a) There was a serious bug; a negative response to MAIL caused the whole
5766 recipient domain to be cached as invalid, thereby blocking all messages
5767 to all local parts at the same domain, from all senders. This bug has
5768 been fixed. The domain is no longer cached after a negative response to
5769 MAIL if the sender used is not empty.
5771 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5774 (c) A new callout option, "use_sender" has been added for people who want
5775 the modified behaviour.
5781 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5784 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5785 indeed breaks things for older releases.
5787 3. Added additional logging to the case where there is a problem reading data
5788 from a filter that is running in a subprocess using a pipe, in order to
5789 try to track down a specific problem.
5791 4. Testing facility fudge: when running in the test harness and attempting
5792 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5793 getting "No route to host". Convert this to a timeout.
5795 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5798 6. Some OS don't have socklen_t but use size_t instead. This affects the
5799 fifth argument of getsockopt() amongst other things. This is now
5800 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5801 can be set for individual OS. I have set it for SunOS5, OSF1, and
5802 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5803 some earlier ones do not.
5805 7. Change 4.30/15 was not doing the test caselessly.
5807 8. The standard form for an IPv6 address literal was being rejected by address
5808 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5809 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5810 this, as well as the form without the "IPv6" on the front (but only when
5811 address literals are enabled, of course).
5813 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5815 10. Exim crashed if a message with an empty sender address specified by -f
5816 encountered a router with an errors_to setting. This could be provoked only
5817 by a command such as
5821 where an empty string was supplied; "<>" did not hit this bug.
5823 11. Installed PCRE release 4.5.
5825 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5826 remained set. It is now erased.
5828 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5829 times from message ids (which are base 36 rather than the normal 62).
5831 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5832 were being counted as actual protocol errors, and logged if the log
5833 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5834 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5835 and DATA following a set of rejected RCPTs do not count as protocol errors.
5836 In other words, Exim assumes they were pipelined, though this may not
5837 actually be the case. Of course, in all cases the client gets an
5838 appropriate error code.
5840 15. If a lookup fails in an ACL condition, a message about the failure may
5841 be available; it is used if testing the ACL cannot continue, because most
5842 such messages specify what the cause of the deferral is. However, some
5843 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5844 that caused an old message to be retained and used if a later statement
5845 caused a defer, replacing the real cause of the deferral.
5847 16. If an IP address had so many PTR records that the DNS lookup buffer
5848 was not large enough to hold them, Exim could crash while trying to process
5849 the truncated data. It now detects and logs this case.
5851 17. Further to 4.21/58, another change has been made: if (and only if) the
5852 first line of a message (the first header line) ends with CRLF, a bare LF
5853 in a subsequent header line has a space inserted after it, so as not to
5854 terminate the header.
5856 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5857 unnecessarily, used atoi() instead of strtol(), and didn't check the
5858 termination when getting file sizes from file names by regex.
5860 19. Completely re-implemented the support for maildirsize files, in the light
5861 of a number of problems with the previous contributed implementation
5862 (4.30/29). In particular:
5864 . If the quota is zero, the maildirsize file is maintained, but no quota is
5867 . If the maildir directory does not exist, it is created before any attempt
5868 to write a maildirsize file.
5870 . The quota value in the file is just a cache; if the quota is changed in
5871 the transport, the new value overrides.
5873 . A regular expression is available for excluding directories from the
5876 20. The autoreply transport checks the characters in options that define the
5877 message's headers; it allows continued headers, but it was checking with
5878 isspace() after an embedded newline instead of explicitly looking for a
5881 21. If all the "regular" hosts to which an address was routed had passed their
5882 expiry times, and had not reached their retry times, the address was
5883 bounced, even if fallback hosts were defined. Now Exim should go on to try
5886 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5887 equivalent code in the SMTP transport. Some hosts send humungous responses
5888 to HELO/EHLO, more than 1024 it seems.
5890 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5891 gives compiler warnings in some environments. I've now done it "properly",
5894 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5895 (because of problems with the built-in one) was declared to return uschar *
5896 instead of char *, causing compiler failure.
5898 25. Fixed a file descriptor leak when processing alias/forward files.
5900 26. Fixed a minor format string issue in dbfn.c.
5902 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5904 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5905 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5908 29. When a sender address is verified, it is cached, to save repeating the test
5909 when there is more than one recipient in a message. However, when the
5910 verification involves a callout, it is possible for different callout
5911 options to be set for different recipients. It is too complicated to keep
5912 track of this in the cache, so now Exim always runs a verification when a
5913 callout is required, relying on the callout cache for the optimization.
5914 The overhead is duplication of the address routing, but this should not be
5917 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5918 to be verified with callout=postmaster, and the main callout worked but the
5919 postmaster check failed, the verification correctly failed. However, if a
5920 subsequent RCPT command asked for sender verification *without* the
5921 postmaster check, incorrect caching caused this verification also to fail,
5924 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5925 it was not caching the DNS options (qualify_single, search_parents) that
5926 were used when the lookup failed. A subsequent lookup with different
5927 options therefore always gave the same answer, though there were cases
5928 where it should not have. (Example: a "domains = !$mx_any" option on a
5929 dnslookup router: the "domains" option is always processed without any
5930 widening, but the router might have qualify_single set.) Now Exim uses the
5931 cached value only when the same options are set.
5933 32. Added John Jetmore's "exipick" utility to the distribution.
5935 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5936 than a timeout (e.g. a certificate is required, and is not provided), an
5937 Exim server now closes the connection immediately. Previously it waited for
5938 the client to close - but if the client is SSL, it seems that they each
5939 wait for each other, leading to a delay before one of them times out.
5941 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5942 maintained 0.8.x compatibility because I don't think many are using it, and
5943 it is clearly obsolete.
5945 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5948 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5949 client certificate was expired. A simple patch fixes this, though I don't
5950 understand the full logic of why the verify callback is called multiple
5953 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5954 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5955 which causes problems with some clients (such as the Certicom SSL Plus
5956 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5957 disables the coutermeasure allowing Eudora to connect."
5959 38. Exim was not checking that a write() to a log file succeeded. This could
5960 lead to Bad Things if a log got too big, in particular if it hit a file
5961 size limit. Exim now panics and dies if it cannot write to a log file, just
5962 as it does if it cannot open a log file.
5964 39. Modified OS/Makefile-Linux so that it now contains
5966 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5968 The two -D definitions ensure that Exim is compiled with large file
5969 support, which makes it possible to handle log files that are bigger than
5972 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5973 instance) a domain was checked against a named list that involved a lookup,
5974 causing $domain_data to be set, then another domain was checked against the
5975 same list, then the first domain was re-checked, the value of $domain_data
5976 after the final check could be wrong. In particular, if the second check
5977 failed, it could be set empty. This bug probably also applied to
5980 41. The strip_trailing_dot option was not being applied to the address given
5981 with the -f command-line option.
5983 42. The code for reading a message's header from the spool was incrementing
5984 $received_count, but never initializing it. This meant that the value was
5985 incorrect (doubled) while delivering a message in the same process in which
5986 it was received. In the most common configuration of Exim, this never
5987 happens - a fresh exec is done - but it can happen when
5988 deliver_drop_privilege is set.
5990 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5991 it now includes up to 150 characters of the unexpected data in the log
5994 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5995 and building data strings. The size of both of these buffers was 10 000
5996 bytes - far larger than anybody would *ever* want, thought I. Needless to
5997 say, somebody hit the limit. I have increased the maximum line length to
5998 20 000 and the maximum data length of concatenated lines to 100 000. I have
5999 also fixed two bugs, because there was no checking on these buffers. Tsk,
6000 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6001 buffer is too small.
6003 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6004 lsearch lookups. Now it does.
6006 46. When parsing a route_list item in a manualroute router, a fixed-length
6007 buffer was used for the list of hosts. I made this 1024 bytes long,
6008 thinking that nobody would ever have a list of hosts that long. Wrong.
6009 Somebody had a whole pile of complicated expansion conditions, and the
6010 string was silently truncated, leading to an expansion error. It turns out
6011 that it is easier to change to an unlimited length (owing to other changes
6012 that have happened since this code was originally written) than to build
6013 structure for giving a limitation error. The length of the item that
6014 expands into the list of hosts is now unlimited.
6016 47. The lsearch lookup could not handle data where the length of text line was
6017 more than 4095 characters. Such lines were truncated, leading to shortened
6018 data being returned. It should now handle lines of any length.
6020 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6021 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6024 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6025 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6026 no longer happens in comment lines. A list of replacements is now placed
6027 at the head of all of the source files, except those whose only change is
6028 to replace PERL_COMMAND in the very first #! line.
6030 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6031 messages on the queue, with a bottom-up merge sort, using code contributed
6032 by Michael Haardt. This should make operations like -bp somewhat faster on
6033 large queues. It won't affect queue runners, except when queue_run_in_order
6036 51. Installed eximstats 1.31 in the distribution.
6038 52. Added support for SRV lookups to the dnslookup router.
6040 53. If an ACL referred to $message_body or $message_body_end, the value was not
6041 reset for any messages that followed in the same SMTP session.
6043 54. The store-handling optimization for building very long strings was not
6044 differentiating between the different store pools. I don't think this
6045 actually made any difference in practice, but I've tidied it.
6047 55. While running the routers to verify a sender address, $sender_address
6048 was still set to the sender address. This is wrong, because when routing to
6049 send a bounce to the sender, it would be empty. Therefore, I have changed
6050 it so that, while verifying a sender address, $sender_address is set to <>.
6051 (There is no change to what happens when verifying a recipient address.)
6053 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6054 target A or AAAA records (if not already returned) without resetting the
6055 qualify_single or search_parents options of the DNS resolver. These are
6056 inappropriate in this case because the targets of MX and SRV records must
6057 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6058 target that, when qualified, matched something in the local domain. These
6059 two options are now turned off when doing these lookups.
6061 57. It seems that at least some releases of Reiserfs (which does not have the
6062 concept of a fixed number of inodes) returns zero and not -1 for the
6063 number of available inodes. This interacted badly with check_spool_inodes,
6064 which assumed that -1 was the "no such thing" setting. What I have done is
6065 to check that the total number of inodes is greater than zero before doing
6066 the test of how many are available.
6068 58. When a "warn" ACL statement has a log_message modifier, the message is
6069 remembered, and not repeated. This is to avoid a lot of repetition when a
6070 message has many recipients that cause the same warning to be written.
6071 However, Exim was preserving the list of already written lines for an
6072 entire SMTP session, which doesn't seem right. The memory is now reset if a
6073 new message is started.
6075 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6076 debugging output unless log_rewrite was also set.
6078 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6079 of (int)(handle) when we know that handle contains (void *)(-1).
6081 61. The Exim daemon panic-logs an error return when it closes the incoming
6082 connection. However "connection reset by peer" seems to be common, and
6083 isn't really an error worthy of noting specially, so that particular error
6086 62. When Exim is trying to find all the local interfaces, it used to panic and
6087 die if the ioctl to get the interface flags failed. However, it seems that
6088 on at least one OS (Solaris 9) it is possible to have an interface that is
6089 included in the list of interfaces, but for which you get a failure error
6090 for this call. This happens when the interface is not "plumbed" into a
6091 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6092 failure of the "get flags" call assumes that the interface is down.
6094 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6095 makes life easier for people who are doing arithmetic on fields extracted
6096 from dates, where you often get leading zeros that should not be
6097 interpreted as octal.
6099 64. Added qualify_domain to the redirect router, to override the global
6102 65. If a pathologically long header line contained very many addresses (the
6103 report of this problem mentioned 10 000) and each of them was rewritten,
6104 Exim could use up a very large amount of memory. (It kept on making new
6105 copies of the header line as it rewrote, and never released the old ones.)
6106 At the expense of a bit more processing, the header rewriting function has
6107 been changed so that it no longer eats memory in this way.
6109 66. The generation of the Received: header has been moved from the time that a
6110 message starts to be received, to the time that it finishes. The timestamp
6111 in the Received: header should now be very close to that of the <= log
6112 line. There are two side-effects of this change:
6114 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6115 logged header lines no longer include the local Received: line, because
6116 it has not yet been created. The same applies to a copy of the message
6117 that is returned to a non-SMTP sender when a message is rejected.
6119 (b) When a filter file is tested using -bf, no additional Received: header
6120 is added to the test message. After some thought, I decided that this
6123 This change does not affect the value of $received_for. It is still set
6124 after address rewriting, but before local_scan() is called.
6126 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6128 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6129 gave an unhelpful panic error message, and a defer error. I have managed to
6130 change this behaviour so that it now rejects any supplied certificate,
6131 which seems right, as the list of acceptable certificates is empty.
6133 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6134 gave an unhelpful defer error. I have not managed to make this reject any
6135 supplied certificates, but the error message it gives is "no certificate
6136 supplied", which is not helpful.
6138 70. exigrep's output now also includes lines that are not associated with any
6139 message, but which match the given pattern. Implemented by a patch from
6140 Martin Sluka, which also tidied up the Perl a bit.
6142 71. Recipient callout verification, like sender verification, was using <> in
6143 the MAIL FROM command. This isn't really the right thing, since the actual
6144 sender may affect whether the remote host accepts the recipient or not. I
6145 have changed it to use the actual sender in the callout; this means that
6146 the cache record is now keyed on a recipient/sender pair, not just the
6147 recipient address. There doesn't seem to be a real danger of callout loops,
6148 since a callout by the remote host to check the sender would use <>.
6149 [SEE ABOVE: changed after hitting problems.]
6151 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6152 temporary errors. However, in the case of such a code being given after
6153 the end of a data transmission (i.e. after ".") Exim was failing to write
6154 a retry record for the message. (Yes, there was some broken host that was
6155 actually sending 8xx at this point.)
6157 73. An unknown lookup type in a host list could cause Exim to panic-die when
6158 the list was checked. (An example that provoked this was putting <; in the
6159 middle of a list instead of at the start.) If this happened during a DATA
6160 ACL check, a -D file could be left lying around. This kind of configuration
6161 error no longer causes Exim to die; instead it causes a defer error. The
6162 incident is still logged to the main and panic logs.
6164 74. Buglet left over from Exim 3 conversion. The message "too many messages
6165 in one connection" was written to the rejectlog but not the mainlog, except
6166 when address rewriting (yes!) was being logged.
6168 75. Added write_rejectlog option.
6170 76. When a system filter was run not as root (that is, when system_filter_user
6171 was set), the values of the $n variables were not being returned to the
6172 main process; thus, they were not subsequently available in the $sn
6175 77. Added +return_path_on_delivery log selector.
6177 78. A connection timeout was being treated differently from recipients deferred
6178 when testing hosts_max_try with a message that was older than the host's
6179 retry timeout. (The host should not be counted, thus allowing all hosts to
6180 be tried at least once before bouncing.) This may have been the cause of an
6181 occasionally reported bug whereby a message would remain on the queue
6182 longer than the retry timeout, but would be bounced if a delivery was
6183 forced. I say "may" because I never totally pinned down the problem;
6184 setting up timeout/retry tests is difficult. See also the next item.
6186 79. The ultimate address timeout was not being applied to errors that involved
6187 a combination of host plus message (for example, a timeout on a MAIL
6188 command). When an address resolved to a number of possible hosts, and they
6189 were not all tried for each delivery (e.g. because of hosts_max_try), a
6190 message could remain on the queue longer than the retry timeout.
6192 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6195 81. Fixed an obscure SMTP outgoing bug which required at least the following
6196 conditions: (a) there was another message waiting for the same server;
6197 (b) the server returned 5xx to all RCPT commands in the first message so
6198 that the message was not completed; (c) the server dropped the connection
6199 or gave a negative response to the RSET that Exim sends to abort the
6200 transaction. The observed case was a dropped connection after DATA that had
6201 been sent in pipelining mode. That is, the server had advertised PIPELINING
6202 but was not implementing it correctly. The effect of the bug was incorrect
6203 behaviour, such as trying another host, and this could lead to a crash.
6209 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6210 and daemon.c were passed as pointers to ints; they should have been
6211 pointers to socklen_t variables (which are typically unsigned ints).
6213 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6216 3. Fixed a really odd bug that affected only the testing scheme; patching a
6217 certain fixed string in the binary changed the value of another string that
6218 happened to be identical to the end of the original first string.
6220 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6221 name", it returns that address as the IP address. On some operating
6222 systems (e.g. Solaris), it also passes back the IP address string as the
6223 "host name". However, on others (e.g. Linux), it passes back an empty
6224 string. Exim wasn't checking for this, and was changing the host name to an
6225 empty string, assuming it had been canonicalized.
6227 5. Although rare, it is permitted to have more than one PTR record for a given
6228 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6229 all the names associated with an address, because they do in Solaris.
6230 However, it seems that they do not in Linux for data that comes from the
6231 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6232 I found this out when I moved to a new Linux workstation and tried to run
6233 the Exim test suite.
6235 To get round this problem I have changed the code so that it now does its
6236 own call to the DNS to look up PTR records when searching for a host name.
6237 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6238 addresses that are only in /etc/hosts are still found.
6240 This behaviour is, however, controlled by an option called host_lookup_
6241 order, which defaults to "bydns:byaddr". If people want to use the other
6242 order, or indeed, just use one or the other means of lookup, they can
6243 specify it in this variable.
6245 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6246 some operating systems, this comes back from gethostbyaddr() as an empty
6247 string, and this is what Exim used to test for. However, it seems that in
6248 other systems, "." is yielded. Exim now tests for this case too.
6250 7. The values of check_spool_space and check_log_space are now held internally
6251 as a number of kilobytes instead of an absolute number of bytes. If a
6252 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6253 kilobyte. This means that much larger values can be stored.
6255 8. Exim monitor: an attempt to get the action menu when not actually pointing
6256 at a message produces an empty menu entitled "No message selected". This
6257 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6258 no entries in it ("Shell widget menu has zero width and/or height"). So I
6259 have added a single, blank menu entry in this case.
6261 9. Added ${quote_local_part.
6263 10. MIME decoding is now applied to the contents of Subject: header lines when
6266 11. Now that a reference to $sender_host_address automatically causes a reverse
6267 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6268 host lookup before query-style lookups in lists that might use this
6269 variable. This has therefore been abolished, and the "net-" prefix is no
6270 longer necessary for query-style lookups.
6272 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6273 have been a typo for LFLAGS, so it has been changed.
6275 13. The install script calls Exim with "-C /dev/null" in order to find the
6276 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6277 to be output. However, since Exim outputs its version number before the
6278 error, it didn't break the script. It just looked ugly. I fixed this by
6279 always allowing "-C /dev/null" if the caller is root.
6281 14. Ignore overlarge ACL variable number when reading spool file - insurance
6282 against a later release with more variables having written the file.
6284 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6285 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6286 this, as well as the form without the "IPv6" on the front.
6288 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6289 OS/Makefile-Darwin file.
6291 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6292 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6294 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6295 variable. However, some OS use ints for inodes. I've added cast to long int
6296 to get rid of the compiler warning.
6298 19. I had forgotten to lock out "/../" in configuration file names when
6299 ALT_CONFIG_PREFIX was set.
6301 20. Routers used for verification do not need to specify transports. However,
6302 if such a router generated a host list, and callout was configured, Exim
6303 crashed, because it could not find a port number from the (non-existent)
6304 transport. It now assumes port 25 in this circumstance.
6306 21. Added the -t option to exigrep.
6308 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6309 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6310 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6311 them is set, LOOKUP_LSEARCH is forced.
6313 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6315 24. Added sender and host information to the "rejected by local_scan()" log
6316 line; previously there was no indication of these.
6318 25. Added .include_if_exists.
6320 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6321 Linux. It turns out that not all file systems support this. Apparently some
6322 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6323 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6324 not supported on the file descriptor, is now ignored when Exim is trying to
6325 sync a directory. This applies only to Linux.
6327 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6329 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6330 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6333 29. Added support for maildirsize files from supplied patch (modified a bit).
6335 30. The use of :fail: followed by an empty string could lead Exim to respond to
6336 sender verification failures with (e.g.):
6338 550 Verification failed for <xxx>
6339 550 Sender verify failed
6341 where the first response line was missing the '-' that indicates it is not
6342 the final line of the response.
6344 31. The loop for finding the name of the user that called Exim had a hardwired
6345 limit of 10; it now uses the value of finduser_retries, which is used for
6346 all other user lookups.
6348 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6351 33. Exim was neglecting to zero errno before one call of strtol() when
6352 expanding a string and expecting an integer value. On some systems this
6353 resulted in spurious "integer overflow" errors. Also, it was casting the
6354 result into an int without checking.
6356 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6357 did not work. The code looks as if it has *never* worked, though it appears
6358 to have been documented since at least release 1.62. I have made it work.
6360 35. The "timeout_DNS" error in retry rules, also documented since at least
6361 1.62, also never worked. As it isn't clear exactly what this means, and
6362 clearly it isn't a major issue, I have abolished the feature by treating it
6363 as "timeout", and writing a warning to the main and panic logs.
6365 36. The display of retry rules for -brt wasn't always showing the error code
6368 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6369 timeout_connect_A, timeout_connect_MX.
6371 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6372 to the empty sender.
6374 39. The daemon was not analysing the content of -oX till after it had closed
6375 stderr and disconnected from the controlling terminal. This meant that any
6376 syntax errors were only noted on the panic log, and the return code from
6377 the command was 0. By re-arranging the code a little, I've made the
6378 decoding happen first, so such errors now appear on stderr, and the return
6379 code is 1. However, the actual setting up of the sockets still happens in
6380 the disconnected process, so errors there are still only recorded on the
6383 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6384 connections (as happens on some IP stacks) was logged at start up time as
6385 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6386 it from "IPv6 and IPv4", which means that two separate sockets are being
6389 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6390 says whether AF_INET or AF_INET6 was passed as an argument.
6392 42. Exiwhat output was messed up when time zones were included in log
6395 43. Exiwhat now gives more information about the daemon's listening ports,
6396 and whether -tls-on-connect was used.
6398 44. The "port" option of the smtp transport is now expanded.
6400 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6401 silently ignored. Now an error message is written to the main and panic
6404 46. There's a new ACL modifier called "logwrite" which writes to a log file
6405 as soon as it is encountered.
6407 47. Added $local_user_uid and $local_user_gid at routing time.
6409 48. Exim crashed when trying to verify a sender address that was being
6412 49. Exim was recognizing only a space character after ".include". It now also
6413 recognizes a tab character.
6415 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6416 extracting the relevant information from the specification. The man page no
6417 longer contains scrambled data for the -d option, and I've added a section
6418 at the front about calling Exim under different names.
6420 51. Added "extra_headers" argument to the "mail" command in filter files.
6422 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6425 53. Installed eximstats 1.29.
6427 54. Added transport_filter_timeout as a generic transport option.
6429 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6430 Cc: header lines. This was required by RFC 822, but it not required by RFC
6433 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6434 incoming messages that did not have them. Now it does so only if the
6435 message originates locally, that is, if there is no associated remote host
6436 address. When Resent- header lines are present, this applies to the Resent-
6437 lines rather than the non-Resent- lines.
6439 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6440 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6442 58. Messages for configuration errors now include the name of the main
6443 configuration file - useful now that there may be more than one file in a
6444 list (.included file names were always shown).
6446 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6447 for those rare installations that do not start the daemon as root or run it
6448 setuid root. I've cut out the call to initgroups() if the daemon is not
6451 60. The Exim user and group can now be bound into the binary as text strings
6452 that are looked up at the start of Exim's processing.
6454 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6456 62. Added $mailstore_basename variable.
6458 63. Installed patch to sieve.c from Michael Haardt.
6460 64. When Exim failed to open the panic log after failing to open the main log,
6461 the original message it was trying to log was written to stderr and debug
6462 output, but if they were not available (the usual case in production), it
6463 was lost. Now it is written to syslog before the two lines that record the
6464 failures to open the logs.
6466 65. Users' Exim filters run in subprocesses under the user's uid. It is
6467 possible for a "deliver" command or an alias in a "personal" command to
6468 provoke an address rewrite. If logging of address rewriting is configured,
6469 this fails because the process is not running as root or exim. There may be
6470 a better way of dealing with this, but for the moment (because 4.30 needs
6471 to be released), I have disabled address rewrite logging when running a
6472 filter in a non-root, non-exim process.
6478 1. The buildconfig auxiliary program wasn't quoting the value set for
6479 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6480 not defined. This bug was masked in 4.22 by the effect that was fixed in
6483 2. Some messages that were rejected after a message id was allocated were
6484 shown as "incomplete" by exigrep. It no longer does this for messages that
6485 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6487 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6488 have allow_domain_literals set, the ID did not get logged in the <= line.
6489 Domain literals are now always recognized in Message-ID: header lines.
6491 4. The first argument for a ${extract expansion item is the key name or field
6492 number. Leading and trailing spaces in this item were not being ignored,
6493 causing some misleading effects.
6495 5. When deliver_drop_privilege was set, single queue runner processes started
6496 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6497 same command in the process it spins off) were not dropping privilege.
6499 6. When the daemon running as "exim" started a queue runner, it always
6500 re-executed Exim in the spun-off process. This is a waste of effort when
6501 deliver_drop_privilege is set. The new process now just calls the
6502 queue-runner function directly.
6508 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6511 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6512 ignored. Though the use of -oP was forcing the writing of a pid file, it
6513 was always written to the default place.
6515 3. If the message "no IP address found for host xxxx" is generated during
6516 incoming verification, it is now followed by identification of the incoming
6517 connection (so you can more easily find what provoked it).
6519 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6521 5. Added some features to "harden" Exim a bit more against certain attacks:
6523 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6524 be put in Local/Makefile. This is like the never_users runtime option,
6525 but it cannot be overridden. The default setting is "root".
6527 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6528 prefix string with which any file named in a -C command line option
6531 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6532 is retained for -C and -D only if the caller of Exim is root. Without
6533 it, the exim user may also use -C and -D and retain privilege.
6535 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6536 command line option is disabled.
6538 6. Macro names set by the -D option must start with an upper case letter, just
6539 like macro names defined in the configuration file.
6541 7. Added "dereference=" facility to LDAP.
6543 8. Two instances of the typo "uknown" in the source files are fixed.
6545 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6546 the Configure-Makefile script screwed up while processing it.
6548 10. Incorporated PCRE 4.4.
6550 11. The SMTP synchronization check was not operating right at the start of an
6551 SMTP session. For example, it could not catch a HELO sent before the client
6552 waited for the greeting. There is now a check for outstanding input at the
6553 point when the greeting is written. Because of the duplex, asynchronous
6554 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6555 way, but not yet received, when the check is performed.
6557 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6558 on TCP/IP sockets, because this apparently causes some broken clients to
6561 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6562 unchanged) from the Cygwin maintainer.
6564 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6565 was supported instead of testing for mbx. Effectively a typo.
6567 15. The spa authenticator server code was not checking that the input it
6568 received was valid base64.
6570 16. The debug output line for the "set" modifier in ACLs was not showing the
6571 name of the variable that was being set.
6573 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6575 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6576 lookup on its own. Something else was needed to trigger the lookup. For
6577 example, a match in host_lookup or the need for a host name in a host list.
6578 Now, if $sender_host_name is referenced and the host name has not yet been
6579 looked up, a lookup is performed. If the lookup fails, the variable remains
6580 empty, and $host_lookup_failed is set to "1".
6582 19. Added "eqi" as a case-independent comparison operator.
6584 20. The saslauthd authentication condition could segfault if neither service
6585 nor realm was specified.
6587 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6588 error message that was logged was misleading, and incoming SMTP
6589 connections were dropped. The message is now more accurate, and temporary
6590 errors are given to SMTP connections.
6592 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6593 (except RSET) with a 421 error, until QUIT is received. However, it was
6594 failing to send a response to QUIT.
6596 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6597 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6598 ACL is now run after the helo_try_verify_hosts code.
6600 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6601 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6602 case-independent, so other case variants are also recognized). Apparently
6603 some systems use these upper case variants.
6605 25. If more than two messages were waiting for the same host, and a transport
6606 filter was specified for the transport, Exim sent two messages over the
6607 same TCP/IP connection, and then failed with "socket operation on non-
6608 socket" when it tried to send the third.
6610 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6612 27. The extern definition of crypt16() in expand.c was not being excluded when
6613 the OS had its own crypt16() function.
6615 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6616 as a preferred synonym for return_size_limit, both as an option and as an
6619 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6621 30. Changed the default configuration ACL to relax the local part checking rule
6622 for addresses that are not in any local domains. For these addresses,
6623 slashes and pipe symbols are allowed within local parts, but the sequence
6624 /../ is explicitly forbidden.
6626 31. SPA server authentication was not clearing the challenge buffer before
6629 32. log_message in a "warn" ACL statement was writing to the reject log as
6630 well as to the main log, which contradicts the documentation and doesn't
6631 seem right (because no rejection is happening). So I have stopped it.
6633 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6634 However, I am unable to do any testing of this.
6636 34. Fixed an infelicity in the appendfile transport. When checking directories
6637 for a mailbox, to see if any needed to be created, it was accidentally
6638 using path names with one or more superfluous leading slashes; tracing
6639 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6641 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6642 contents are added to the log line that is written for every discarded
6643 recipient. (Previously a log_message setting was ignored.)
6645 36. The ${quote: operator now quotes the string if it is empty.
6647 37. The install script runs exim in order to find its version number. If for
6648 some reason other than non-existence or emptiness, which it checks, it
6649 could not run './exim', it was installing it with an empty version number,
6650 i.e. as "exim-". This error state is now caught, and the installation is
6653 38. An argument was missing from the function that creates an error message
6654 when Exim fails to connect to the socket for saslauthd authentication.
6655 This could cause Exim to crash, or give a corrupted message.
6657 39. Added isip, isip4, and isip6 to ${if conditions.
6659 40. The ACL variables $acl_xx are now saved with the message, and can be
6660 accessed later in routers, transports, and filters.
6662 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6663 strings in the file are not string-expanded.
6665 42. If a MAIL command specified a SIZE value that was too large to fit into an
6666 int variable, the check against message_size_limit failed. Such values are
6667 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6668 day this will have to be increased, but I don't think I want to be around
6669 when emails are that large.
6676 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6677 iconv() is not standard in FreeBSD.
6679 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6680 IPv6 enabled. The observed symptom was a segmentation fault on return from
6681 the function os_common_find_running_interfaces() in src/os.c.
6683 3. In the check_special_case() function in daemon.c I had used "errno" as an
6684 argument name, which causes warnings on some systems. This was basically a
6685 typo, since it was named "eno" in the comments!
6687 4. The code that waits for the clock to tick (at a resolution of some fraction
6688 of a second) so as to ensure message-id uniqueness was always waiting for
6689 at least one whole tick, when it could have waited for less. [This is
6690 almost certainly not relevant at current processor speeds, where it is
6691 unlikely to ever wait at all. But we try to future-proof.]
6693 5. The function that sleeps for a time interval that includes fractions of a
6694 second contained a race. It did not block SIGALRM between setting the
6695 timer, and suspending (a couple of lines later). If the interval was short
6696 and the sigsuspend() was delayed until after it had expired, the suspension
6697 never ended. On busy systems this could lead to processes getting stuck for
6700 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6701 process, before it forks any delivery processes. The open lookup caching
6702 mechanism meant that the open file or database connection was passed into
6703 the delivery process. The problem was that delivery processes always tidy
6704 up cached lookup data. This could cause a problem for the next delivery
6705 process started by the queue runner, because the external queue runner
6706 process does not know about the closure. So the next delivery process
6707 still has data in the lookup cache. In the case of a file lookup, there was
6708 no problem because closing a file descriptor in a subprocess doesn't affect
6709 the parent. However, if the lookup was caching a connection to a database,
6710 the connection was closed, and the second delivery process was likely to
6711 see errors such as "PGSQL: query failed: server closed the connection
6712 unexpectedly". The problem has been fixed by closing all cached lookups
6713 in a queue runner before running a delivery process.
6715 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6716 seem to have the "const" qualifier which it has on other OS. I've
6719 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6720 *of the same type* (client or server) with the same public name that an
6721 error should be diagnosed.
6723 9. When Exim looked up a host name for an IP address, but failed to find the
6724 original IP address when looking up the host name (a safety check), it
6725 output the message "<ip address> does not match any IP for NULL", which was
6726 confusing, to say the least. The bug was that the host name should have
6727 appeared instead of "NULL".
6729 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6730 user that is built into the binary, and the -C or -D options is used, root
6731 privilege is dropped before the configuration file is read. In addition,
6732 logging is switched to stderr instead of the normal log files. If the
6733 configuration then re-defines the Exim user, the unprivileged environment
6734 is probably not what is expected, so Exim logs a panic warning message (but
6737 However, if deliver_drop_privilege is set, the unprivileged state may well
6738 be exactly what is intended, so the warning has been cut out in that case,
6739 and Exim is allowed to try to write to its normal log files.
6745 1. smtp_return_error_details was not giving details for temporary sender
6746 or receiver verification errors.
6748 2. Diagnose a configuration error if two authenticators have the same public
6751 3. Exim used not to create the message log file for a message until the first
6752 delivery attempt. This could be confusing when incoming messages were held
6753 for policy or load reasons. The message log file is now created at the time
6754 the message is received, and an initial "Received" line is written to it.
6756 4. The automatically generated man page for command line options had a minor
6757 bug that caused no ill effects; however, a more serious problem was that
6758 the procedure for building the man page automatically didn't always
6759 operate. Consequently, release 4.20 contains an out-of-date version. This
6760 shouldn't happen again.
6762 5. When building Exim with embedded Perl support, the script that builds the
6763 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6764 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6766 6. The freeze_tell option was not being used for messages that were frozen on
6767 arrival, either by an ACL or by local_scan().
6769 7. Added the smtp_incomplete_transaction log selector.
6771 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6772 was accepting AUTH without a new EHLO.
6774 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6775 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6778 10. Logging of TCP/IP connections (when configured) now happens in the main
6779 daemon process instead of the child process, so that the TCP/IP connection
6780 count is more accurate (but it can never be perfect).
6782 11. The use of "drop" in a nested ACL was not being handled correctly in the
6783 outer ACL. Now, if condition failure induced by the nested "drop" causes
6784 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6785 or "require"), the connection is dropped.
6787 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6788 that yield "discard" can now be used with an "accept" or a "discard" verb,
6789 but an error is generated for any others (because I can't see a useful way
6790 to define what should happen).
6792 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6793 are now processed in the same way as lines in the Exim configuration file.
6794 In particular, continuation lines are supported.
6796 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6798 15. Added -ti meaning -t -i.
6800 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6801 domains, and warn by logging if others are found.
6803 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6804 returned from GIFCONF when Exim is trying to find the list of interfaces on
6805 a host. The code in os.c has been modified to copy each ifreq to an aligned
6806 structure in all cases.
6808 Also, in some cases, the returned ifreq's were being copied to a 'struct
6809 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6810 means the last couple of bytes of an IPv6 address could be chopped if the
6811 ifreq contained only a normal sockaddr (14 bytes storage).
6813 18. Named domain lists were not supported in the hosts_treat_as_local option.
6814 An entry such as +xxxx was not recognized, and was treated as a literal
6817 19. Ensure that header lines added by a DATA ACL are included in the reject log
6818 if the ACL subsequently rejects the message.
6820 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6821 MD5 (which is deprecated).
6823 21. When testing a filter file using -bf, Exim was writing a message when it
6824 took the sender from a "From " line in the message, but it was not doing so
6825 when it took $return_path from a Return-Path: header line. It now does.
6827 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6828 with a valid header line field name (a series of printing characters
6829 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6831 23. Changed "disc" in the source to "disk" to conform to the documentation and
6832 the book and for uniformity.
6834 24. Ignore Sendmail's -Ooption=value command line item.
6836 25. When execve() failed while trying to run a command in a pipe transport,
6837 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6838 could be confused with a return value of 69 from the command itself. This
6839 has been changed to 127, the value the shell returns if it is asked to run
6840 a non-existent command. The wording for the related log line suggests a
6841 non-existent command as the problem.
6843 26. If received_header_text expands to an empty string, do not add a Received:
6844 header line to the message. (Well, it adds a token one on the spool, but
6845 marks it "old" so that it doesn't get used or transmitted.)
6847 27. Installed eximstats 1.28 (addition of -nt option).
6849 28. There was no check for failure on the call to getsockname() in the daemon
6850 code. This can fail if there is a shortage of resources on the system, with
6851 ENOMEM, for example. A temporary error is now given on failure.
6853 29. Contrary to the C standard, it seems that in some environments, the
6854 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6855 program. Exim now does this explicitly; it affects the formatting of
6856 timestamps using strftime().
6858 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6859 complaints. I've now initialized all the variables, to avoid this.
6861 32. Header lines added by a system filter were not being "seen" during
6862 transport-time rewrites.
6864 33. The info_callback() function passed to OpenSSL is set up with type void
6865 (*)(SSL *, int, int), as described somewhere. However, when calling the
6866 function (actually a macro) that sets it up, the type void(*)() is
6867 expected. I've put in a cast to prevent warnings from picky compilers.
6869 34. If a DNS black list lookup found a CNAME record, but there were no A
6870 records associated with the domain it pointed at, Exim crashed.
6872 35. If a DNS black list lookup returned more than one A record, Exim ignored
6873 all but the first. It now scans all returned addresses if a particular IP
6874 value is being sought. In this situation, the contents of the
6875 $dnslist_value variable are a list of all the addresses, separated by a
6878 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6879 to accept a host name and all its aliases if the forward lookup for any of
6880 them yielded the IP address of the incoming connection. Now it accepts only
6881 those names whose forward lookup yields the correct IP address. Any other
6882 names are discarded. This closes a loophole whereby a rogue DNS
6883 administrator could create reverse DNS records to break through a
6884 wildcarded host restriction in an ACL.
6886 37. If a user filter or a system filter that ran in a subprocess used any of
6887 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6888 the wrong values were passed to the pipe command ($thisaddress had the
6889 value of $0, $0 had the value of $1, etc). This bug was introduced by
6890 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6892 38. Improved the line breaking for long SMTP error messages from ACLs.
6893 Previously, if there was no break point between 40 and 75 characters, Exim
6894 left the rest of the message alone. Two changes have been made: (a) I've
6895 reduced the minimum length to 35 characters; (b) if it can't find a break
6896 point between 35 and 75 characters, it looks ahead and uses the first one
6897 that it finds. This may give the occasional overlong line, but at least the
6898 remaining text gets split now.
6900 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6901 file descriptors might be low, and that setting 1000 would always raise it.
6902 It turns out that in some environments, the limit is already over 1000 and
6903 that lowering it causes trouble. So now Exim takes care not to decrease it.
6905 40. When delivering a message, the value of $return_path is set to $sender_
6906 address at the start of routing (routers may change the value). By an
6907 oversight, this default was not being set up when an address was tested by
6908 -bt or -bv, which affected the outcome if any router or filter referred to
6911 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6912 log only when "message" or "log_message" are set. However, if one of the
6913 conditions was an address verification, or a call to a nested ACL, the
6914 messages generated by the underlying test were being passed through. This
6915 no longer happens. The underlying message is available in $acl_verify_
6916 message for both "message" and "log_message" expansions, so it can be
6917 passed through if needed.
6919 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6920 new expansion $bh_ to give the encoded byte string without charset
6921 translation. Translation happens only if iconv() is available; HAVE_ICONV
6922 indicates this at build time. HEADERS_CHARSET gives the charset to
6923 translate to; headers_charset can change it in the configuration, and
6924 "headers charset" can change it in an individual filter file.
6926 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6927 that creates RFC 2047 encoded "words" labels them as that charset instead
6928 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6929 expansion operator; (ii) when Exim creates a From: line for a local
6930 message; (iii) when a header line is rewritten to include a "phrase" part.
6932 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6933 buggy, causing it to skip the first lines of messages whose message ID
6934 ended in 'D'. This would not have bitten before Exim release 4.14, because
6935 message IDs were unlikely to end in 'D' before then. The effect was to have
6936 incorrect size information for certain domains.
6938 45. #include "config.h" was missing at the start of the crypt16.c module. This
6939 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6942 46. If there was a timeout during a "random" callout check, Exim treated it as
6943 a failure of the random address, and carried on sending RSET and the real
6944 address. If the delay was just some slowness somewhere, the response to the
6945 original RCPT would be taken as a response to RSET and so on, causing
6946 mayhem of various kinds.
6948 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6949 when I implemented it. It didn't allow for the fact that some option values
6950 may legitimately be negative (e.g. size_addition), and it didn't even do
6951 the right test for positive values.
6953 48. Domain names in DNS records are case-independent. Exim always looks them up
6954 in lower case. Some resolvers return domain names in exactly the case they
6955 appear in the zone file, that is, they may contain uppercase letters. Not
6956 all resolvers do this - some return always lower case. Exim was treating a
6957 change of case by a resolver as a change of domain, similar to a widening
6958 of a domain abbreviation. This triggered its re-routing code and so it was
6959 trying to route what was effectively the same domain again. This normally
6960 caused routing to fail (because the router wouldn't handle the domain
6961 twice). Now Exim checks for this case specially, and just changes the
6962 casing of the domain that it ultimately uses when it transmits the message
6965 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6968 50. If a filter generated a file delivery with a non-absolute name (possible if
6969 no home directory exists for the router), the forbid_file option was not
6972 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6973 the existing equality matching.
6975 52. Exim was using ints instead of ino_t variables in some places where it was
6976 dealing with inode numbers.
6978 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6979 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6980 called TMPDIR, and if it finds it is different, it changes its value.
6982 54. The smtp_printf() function is now made available to local_scan() so
6983 additional output lines can be written before returning. There is also an
6984 smtp_fflush() function to enable the detection of a dropped connection.
6985 The variables smtp_input and smtp_batched_input are exported to
6988 55. Changed the default runtime configuration: the message "Unknown user"
6989 has been removed from the ACL, and instead placed on the localuser router,
6990 using the cannot_route_message feature. This means that any verification
6991 failures that generate their own messages won't get overridden. Similarly,
6992 the "Unrouteable address" message that was in the ACL for unverifiable
6993 relay addresses has also been removed.
6995 56. Added hosts_avoid_esmtp to the smtp transport.
6997 57. The exicyclog script was not checking for the esoteric option
6998 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6999 will work only if exicyclog is run under the appropriate euid.
7001 58. Following a discussion on the list, the rules by which Exim recognises line
7002 endings on incoming messages have been changed. The -dropcr and drop_cr
7003 options are now no-ops, retained only for backwards compatibility. The
7004 following line terminators are recognized: LF CRLF CR. However, special
7005 processing applies to CR:
7007 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7008 nor a local message in the state where . is a terminator.
7010 (ii) If a bare CR is encountered in a header line, an extra space is added
7011 after the line terminator so as not to end the header. The reasoning
7012 behind this is that bare CRs in header lines are most likely either
7013 to be mistakes, or people trying to play silly games.
7015 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7016 was being incorrectly given as 18 bytes larger than it should have been.
7017 This is a VOB (very old bug).
7019 60. This may never have affected anything current, but just in case it has:
7020 When the local host is found other than at the start of a list of hosts,
7021 the local host, those with the same MX, and any that follow, are discarded.
7022 When the list in question was part of a longer list of hosts, the following
7023 hosts (not currently being processed) were also being discarded. This no
7024 longer happens. I'm not sure if this situation could ever has previously
7027 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7030 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7031 header. This is something that is recommended in a new Internet Draft, and
7032 is something that is documented as being done by Sendmail. There are two
7033 possible values. For messages generated by the autoreply transport, Exim
7036 Auto-Submitted: auto-replied
7038 whereas for all other generated messages (e.g. bounces) it adds
7040 Auto-Submitted: auto-generated
7042 63. The "personal" condition in filters now includes a test for the
7043 Auto-Submitted: header. If it contains the string "auto-" the message it
7044 not considered personal.
7046 64. Added rcpt_include_affixes as a generic transport option.
7048 65. Added queue_only_override (default true).
7050 66. Added the syslog_duplication option.
7052 67. If what should have been the first header line of a message consisted of
7053 a space followed by a colon, Exim was mis-interpreting it as a header line.
7054 It isn't of course - it is syntactically invalid and should therefore be
7055 treated as the start of the message body. The misbehaviour could have
7056 caused a number of strange effects, including loss of data in subsequent
7057 header lines, and spool format errors.
7059 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7060 client host had authenticated. This control can now be exercised by an ACL
7061 for more flexibility.
7063 69. By default, callouts do not happen when testing with -bh. There is now a
7064 variant, -bhc, which does actually run the callout code, including
7065 consulting and updating the callout cache.
7067 70. Added support for saslauthd authentication, courtesy of Alexander
7070 71. If statvfs() failed on the spool or log directories while checking their
7071 size for availability, Exim confusingly gave the error "space shortage".
7072 Furthermore, in debugging mode it crashed with a floating point exception.
7073 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7074 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7075 serious problem, Exim now writes to the main and panic logs when this
7076 happens, with details of the failure. It then refuses to accept the
7077 incoming message, giving the message "spool directory problem" or "log
7078 directory problem" with a 421 code for SMTP messages.
7080 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7081 0, 1, and 2 exist, because some OS complain for execs without them (see
7082 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7083 descriptors. However, the code omitted to check that the open succeeded,
7084 causing mysterious errors if for some reason the permissions on /dev/null
7085 got screwed. Now Exim writes a message to the main and panic logs, and
7086 bombs out if it can't open /dev/null.
7088 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7089 interact so that it is all more flexible. It is supposed to remain
7090 backwards compatible. Also added extra_local_interfaces.
7092 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7093 to bomb out with an assertion failure - to the client this appears as a
7094 connection drop. This problem occurs in the part of the code that was taken
7095 from the Samba project. Fortunately, the assertion is in a very simple
7096 function, so I have fixed this by reproducing the function inline in the
7097 one place where it is called, and arranging for authentication to fail
7098 instead of killing the process with assert().
7100 75. The SPA client code was not working when the server requested OEM rather
7101 than Unicode encoding.
7103 76. Added code to make require_files with a specific uid setting more usable in
7104 the case where statting the file as root fails - usually a non-root-mounted
7105 NFS file system. When this happens and the failure is EACCES, Exim now
7106 forks a subprocess and does the per-uid checking as the relevant uid.
7108 77. Added process_log_path.
7110 78. If log_file_path was not explicitly set, a setting of check_log_space or
7111 check_log_inodes was ignored.
7113 79. If a space check for the spool or log partitions fails, the incident is now
7114 logged. Of course, in the latter case the data may get lost...
7116 80. Added the %p formatting code to string_format() so that it can be used to
7117 print addresses in debug_print(). Adjusted all the address printing in the
7118 debugging in store.c to use %p rather than %d.
7120 81. There was a concern that a line of code in smtp_in.c could overflow a
7121 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7122 initially expressed, the concern was not well-founded, because trailing
7123 spaces are removed early. However, if the trailing spaces were followed by
7124 a NULL, they did not get removed, so the overflow was possible. Two fixes
7127 (a) I re-wrote the offending code in a cleaner fashion.
7128 (b) If an incoming SMTP command contains a NULL character, it is rejected
7131 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7132 runs initgroups(), so that if the Exim user is in any additional groups,
7133 they will be used during message reception.
7139 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob