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 JH/01 Replace the store_release() internal interface with store_newblock(),
19 which internalises the check required to safely use the old one, plus
20 the allocate and data copy operations duplicated in both (!) of the
23 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
24 modifier. This matches the restriction on the commandline.
26 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
27 Previously only the last row was returned.
29 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
30 we assumed that tags in the header were well-formed, and parsed the
31 element content after inspecting only the first char of the tag.
32 Assumptions at that stage could crash the receive process on malformed
35 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
36 While running the DKIM ACL we operate on the Permanent memory pool so that
37 variables created with "set" persist to the DATA ACL. Also (at any time)
38 DNS lookups that fail create cache records using the Permanent pool. But
39 expansions release any allocations made on the current pool - so a dnsdb
40 lookup expansion done in the DKIM ACL releases the memory used for the
41 DNS negative-cache, and bad things result. Solution is to switch to the
42 Main pool for expansions.
43 While we're in that code, add checks on the DNS cache during store_reset,
44 active in the testsuite.
45 Problem spotted, and debugging aided, by Wolfgang Breyha.
47 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
48 When none of the hosts presented to a transport match an already-open
49 connection, close it and proceed with the list. Previously we would
50 queue the message. Spotted by Lena with Yahoo, probably involving
53 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
54 Previously a spurious "250 OK id=" response was appended to the proper
57 JH/08 The "support for" informational output now, which built with Content
58 Scanning support, has a line for the malware scanner interfaces compiled
59 in. Interface can be individually included or not at build time.
61 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
62 by the template makefile "src/EDITME". The "STREAM" support for an older
63 ClamAV interface method is removed.
65 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
66 rows affected is given instead).
68 JH/11 The runtime Berkeley DB library version is now additionally output by
69 "exim -d -bV". Previously only the compile-time version was shown.
71 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
72 SMTP connection. Previously, when one had more receipients than the
73 first, an abortive onward connection was made. Move to full support for
74 multiple onward connections in sequence, handling cutthrough connection
75 for all multi-message initiating connections.
77 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
78 routers. Previously, a multi-recipient message would fail to match the
79 onward-connection opened for the first recipient, and cause its closure.
81 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
82 a timeout on read on a GnuTLS initiating connection, resulting in the
83 initiating connection being dropped. This mattered most when the callout
84 was marked defer_ok. Fix to keep the two timeout-detection methods
87 JH/15 Relax results from ACL control request to enable cutthrough, in
88 unsupported situations, from error to silently (except under debug)
89 ignoring. This covers use with PRDR, frozen messages, queue-only and
92 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
94 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
95 metadata, resulting in a crash in free().
97 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
98 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
99 Broken also in d185889f4, with init system revamp.
101 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
102 Previously we abruptly closed the connection after reading a malware-
103 found indication; now we go on to read the "scan ok" response line,
106 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
107 ACL. Previously, a crash would result.
109 JH/19 Speed up macro lookups during configuration file read, by skipping non-
110 macro text after a replacement (previously it was only once per line) and
111 by skipping builtin macros when searching for an uppercase lead character.
113 JH/20 DANE support moved from Experimental to mainline. The Makefile control
114 for the build is renamed.
116 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
117 was allocated for every new TLS startup, meaning one per message. Fix
118 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
120 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
121 reported the original. Fix to report (as far as possible) the ACL
122 result replacing the original.
124 JH/23 Fix memory leak during multi-message connections using STARTTLS under
125 OpenSSL. Certificate information is loaded for every new TLS startup,
126 and the resources needed to be freed.
128 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
130 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
133 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
134 DATA response info to the (existing) per-recipient response info for
135 the "C=" log element. It can have useful tracking info from the
136 destination system. Patch from Simon Arlott.
138 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
139 length value. Previously this would segfault.
141 HS/02 Support Avast multiline protoocol, this allows passing flags to
142 newer versions of the scanner.
144 JH/28 Ensure that variables possibly set during message acceptance are marked
145 dead before release of memory in the daemon loop. This stops complaints
146 about them when the debug_store option is enabled. Discovered specifically
147 for sender_rate_period, but applies to a whole set of variables.
148 Do the same for the queue-runner loop, for variables set from spool
149 message files. Do the same for the SMTP per-message loop, for certain
150 variables indirectly set in ACL operations.
152 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
153 as a multi-recipient message from a mailinglist manager). The coding had
154 an arbitrary cutoff number of characters while checking for more input;
155 enforced by writing a NUL into the buffer. This corrupted long / fast
156 input. The problem was exposed more widely when more pipelineing of SMTP
157 responses was introduced, and one Exim system was feeding another.
158 The symptom is log complaints of SMTP syntax error (NUL chars) on the
159 receiving system, and refused recipients seen by the sending system
160 (propating to people being dropped from mailing lists).
161 Discovered and pinpointed by David Carter.
163 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
164 replaced by the ${authresults } expansion.
166 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
168 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
169 allows proper process termination in container environments.
175 JH/01 Rework error string handling in TLS interface so that the caller in
176 more cases is responsible for logging. This permits library-sourced
177 string to be attached to addresses during delivery, and collapses
178 pairs of long lines into single ones.
180 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
181 during configuration. Wildcards are allowed and expanded.
183 JH/02 Rework error string handling in DKIM to pass more info back to callers.
184 This permits better logging.
186 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
187 do not close it down and have the child transport start it up again on
188 the passed-on TCP connection. Instead, proxy the child (and any
189 subsequent ones) for TLS via a unix-domain socket channel. Logging is
190 affected: the continued delivery log lines do not have any DNSSEC, TLS
191 Certificate or OCSP information. TLS cipher information is still logged.
193 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
194 identical IP addresses on different listening ports. Will also affect
197 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
198 add noisy ifdef guards to special-case this sillyness.
199 Patch from Bernd Kuhls.
201 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
202 than 255 are no longer allowed.
204 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
205 Disable the session-cache too, which might reduce our load. Since we
206 currrectly use a new context for every connection, both as server and
207 client, there is no benefit for these.
208 GnuTLS appears to not support tickets server-side by default (we don't
209 call gnutls_session_ticket_enable_server()) but client side is enabled
210 by default on recent versions (3.1.3 +) unless the PFS priority string
213 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
214 <https://reproducible-builds.org/specs/source-date-epoch/>.
216 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
217 the check for any unsuccessful recipients did not notice the limit, and
218 erroneously found still-pending ones.
220 JH/08 Pipeline CHUNKING command and data together, on kernels that support
221 MSG_MORE. Only in-clear (not on TLS connections).
223 JH/09 Avoid using a temporary file during transport using dkim. Unless a
224 transport-filter is involved we can buffer the headers in memory for
225 creating the signature, and read the spool data file once for the
226 signature and again for transmission.
228 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
229 4.77 as the kernel support then wasn't solid, having issues in 64bit
230 mode. Now, it's been long enough. Add support for FreeBSD also.
232 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
233 case where the routing stage had gathered several addresses to send to
234 a host before calling the transport for the first, we previously failed
235 to close down TLS in the old transport process before passing the TCP
236 connection to the new process. The new one sent a STARTTLS command
237 which naturally failed, giving a failed delivery and bloating the retry
238 database. Investigation and fix prototype from Wolfgang Breyha.
240 JH/12 Fix check on SMTP command input synchronisation. Previously there were
241 false-negatives in the check that the sender had not preempted a response
242 or prompt from Exim (running as a server), due to that code's lack of
243 awareness of the SMTP input buffering.
245 PP/04 Add commandline_checks_require_admin option.
246 Exim drops privileges sanely, various checks such as -be aren't a
247 security problem, as long as you trust local users with access to their
248 own account. When invoked by services which pass untrusted data to
249 Exim, this might be an issue. Set this option in main configuration
250 AND make fixes to the calling application, such as using `--` to stop
253 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
254 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
255 responses to those, into a single TLS record each way (this usually means
256 a single packet). As a side issue, smtp_enforce_sync now works on TLS
259 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
260 affects you only if you're dancing at the edge of the param size limits.
261 If you are, and this message makes sense to you, then: raise the
262 configured limit or use OpenSSL 1.1. Nothing we can do for older
265 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
266 cmdline element to get the documented default one. Previously it was
269 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
270 are unsuable for non-message-specific reasons - eg. connection timeout,
271 banner-time rejection.
273 JH/16 Fix logging of delivery remote port, when specified by router, under
276 PP/06 Repair manualroute's ability to take options in any order, even if one
277 is the name of a transport.
280 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
282 JH/17 Change the list-building routines interface to use the expanding-string
283 triplet model, for better allocation and copying behaviour.
285 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
286 Previously it was constructed the first time a possibly-matching string
287 was met in the configuration file input during startup; now it is done
290 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
291 compatible one, to avoid the (poorly documented) possibility of a config
292 file in the working directory redirecting the DB files, possibly correpting
293 some existing file. CVE-2017-10140 assigned for BDB.
295 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
296 cache-hot. Previously, although the result was properly cached, the
297 initial verify call returned a defer.
299 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
300 the main verify for receipient in uncached-mode.
302 JH/22 Retire historical build files to an "unsupported" subdir. These are
303 defined as "ones for which we have no current evidence of testing".
305 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
306 if present. Previously it was ignored.
308 JH/24 Start using specified-initialisers in C structure init coding. This is
309 a C99 feature (it's 2017, so now considered safe).
311 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
312 if was a fixed-sized field and bitmask ops via macros; it is now more
315 PP/07 GitHub PR 56: Apply MariaDB build fix.
316 Patch provided by Jaroslav Škarvada.
318 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
319 during Coverity cleanups [4.87 JH/47]
320 Diagnosis and fix provided by Michael Fischer v. Mollard.
322 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
323 the right size to place the terminating semicolon on its own folded
324 line, the header hash was calculated to an incorrect value thanks to
325 the (relaxed) space the fold became.
327 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
328 and confused the parent.
330 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
331 which could crash as a result. This could lead to undeliverable messages.
333 JH/28 Logging: "next input sent too soon" now shows where input was truncated
336 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
337 matters on fast-turnover and PID-randomising systems, which were getting
338 out-of-order delivery.
340 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
341 a possibly-overlapping copy. The symptom was that "Remote host closed
342 connection in response to HELO" was logged instead of the actual 4xx
345 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
346 Previously only that bufferd was discarded, resulting in SYMTP command
349 JH/32 DKIM: when a message has multiple signatures matching an identity given
350 in dkim_verify_signers, run the dkim acl once for each. Previously only
351 one run was done. Bug 2189.
353 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
354 "panic the current process" to "deliberately defer". The panic log is
355 still written with the problem list name; the mail and reject logs now
356 get a temp-reject line for the message that was being handled, saying
357 something like "domains check lookup or other defer". The SMTP 451
358 message is still "Temporary local problem".
360 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
361 A crafted sequence of BDAT commands could result in in-use memory beeing
362 freed. CVE-2017-16943.
364 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
365 from SMTP input. Previously it was always done; now only done for DATA
366 and not BDAT commands. CVE-2017-16944.
368 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
369 to the message (such as an overlong header line). Previously this was
370 not done and we did not exit BDAT mode. Followon from the previous item
371 though a different problem.
377 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
378 than -2003 did; needs libidn2 in addition to libidn.
380 JH/02 The path option on a pipe transport is now expanded before use.
382 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
383 Patch provided by "Björn", documentation fix added too.
385 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
386 missing a wire-to-host endian conversion.
388 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
389 close after a BDAT command line could be taken as a following command,
390 giving a synch failure. Fix by only checking for synch immediately
391 before acknowledging the chunk.
393 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
394 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
395 macro. Patches provided by Josh Soref.
397 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
398 Previously we did not; the RFC seems ambiguous and VRFY is not listed
399 by IANA as a service extension. However, John Klensin suggests that we
402 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
403 the dkim code may be unix-mode line endings rather than smtp wire-format
404 CRLF, so prepend a CR to any bare LF.
406 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
407 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
409 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
410 the first were themselves being wrongly included in the feed into dkim
411 processing; with most chunk sizes in use this resulted in an incorrect
412 body hash calculated value.
414 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
415 DKIM signature block, for verification. Although advised against by
416 standards it is specifically not ruled illegal.
418 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
420 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
421 missing a body hash (the bh= tag).
423 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
424 It seems that HAProxy sends the Proxy Protocol information in clear and
425 only then does a TLS startup, so do the same.
427 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
428 TCP connections (such as for Spamd) unless the daemon successfully set
429 Fast Open mode on its listening sockets. This fixes breakage seen on
430 too-old kernels or those not configured for Fast Open, at the cost of
431 requiring both directions being enabled for TFO, and TFO never being used
432 by non-daemon-related Exim processes.
434 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
435 endings, at least on the first header line. Try to canonify any that get
436 past that check, despite the cost.
438 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
439 now limited to an arbitrary five deep, while parsing addresses with the
440 strip_excess_angle_brackets option enabled.
442 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
443 instead leave the unprompted TLS handshake in socket buffer for the
444 TLS library to consume.
446 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
448 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
450 JH/16 Drop variables when they go out of scope. Memory management drops a whole
451 region in one operation, for speed, and this leaves assigned pointers
452 dangling. Add checks run only under the testsuite which checks all
453 variables at a store-reset and panics on a dangling pointer; add code
454 explicitly nulling out all the variables discovered. Fixes one known
455 bug: a transport crash, where a dangling pointer for $sending_ip_address
456 originally assigned in a verify callout, is re-used.
458 PP/06 Drop '.' from @INC in various Perl scripts.
460 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
462 PP/08 Reduce a number of compilation warnings under clang; building with
463 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
464 should be warning-free.
466 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
468 HS/01 Fix portability problems introduced by PP/08 for platforms where
469 realloc(NULL) is not equivalent to malloc() [SunOS et al].
471 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
472 chunk. This allows us to accept broken chunked messages. We need a more
473 general solution here.
475 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
476 already-broken messages in the queue.
478 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
480 JH/19 Fix reference counting bug in routing-generated-address tracking.
486 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
487 supports it and a size is available (ie. the sending peer gave us one).
489 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
490 years of being deprecated). The replacements are the ACLs
491 acl_smtp_mime and acl_not_smtp_mime.
493 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
494 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
495 or even an in-clear connection were permitted. Now, if the host lookup
496 was dnssec and dane was requested then the host is only used if the
497 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
498 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
499 if one fails this test.
500 This means that a poorly-configured remote DNS will make it incommunicado;
501 but it protects against a DNS-interception attack on it.
503 JH/04 Bug 1810: make continued-use of an open smtp transport connection
504 non-noisy when a race steals the message being considered.
506 JH/05 If main configuration option tls_certificate is unset, generate a
507 self-signed certificate for inbound TLS connections.
509 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
510 in rewrites and routers.
512 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
513 and logged a warning sing 4.83; now they are a configuration file error.
515 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
516 (lacking @domain). Apply the same qualification processing as RCPT.
518 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
520 JH/10 Support ${sha256:} applied to a string (as well as the previous
523 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
524 a cutthrough deliver is pending, as we always want to make a connection.
525 This also avoids re-routing the message when later placing the cutthrough
526 connection after a verify cache hit.
527 Do not update it with the verify result either.
529 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
530 when routing results in more than one destination address.
532 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
533 signing (which inhibits the cutthrough capability). Previously only
534 the presence of an option was tested; now an expansion evaluating as
535 empty is permissible (obviously it should depend only on data available
536 when the cutthrough connection is made).
538 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
539 the relevant preceding SMTP command did not note the pipelining mode.
541 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
542 Previously they were not counted.
544 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
545 as one having no matching records. Previously we deferred the message
546 that needed the lookup.
548 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
549 distinguished as "(=".
551 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
552 for missing MX records. Previously it only worked for missing A records.
554 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
556 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
557 after the data-go-ahead and data-ack. Patch from Jason Betts.
559 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
560 even for a "none" policy. Patch from Tony Meyer.
562 JH/22 Fix continued use of a connection for further deliveries. If a port was
563 specified by a router, it must also match for the delivery to be
566 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
567 When one of the recipients of a message was unsuitable for the connection
568 (has no matching addresses), we lost track of needing to mark it
569 deferred. As a result mail would be lost.
571 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
573 JH/25 Decoding ACL controls is now done using a binary search; the source code
574 takes up less space and should be simpler to maintain. Merge the ACL
575 condition decode tables also, with similar effect.
577 JH/26 Fix problem with one_time used on a redirect router which returned the
578 parent address unchanged. A retry would see the parent address marked as
579 delivered, so not attempt the (identical) child. As a result mail would
582 JH/27 Fix a possible security hole, wherein a process operating with the Exim
583 UID can gain a root shell. Credit to http://www.halfdog.net/ for
584 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
587 JH/28 Enable {spool,log} filesystem space and inode checks as default.
588 Main config options check_{log,spool}_{inodes,space} are now
589 100 inodes, 10MB unless set otherwise in the configuration.
591 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
592 Previously it only applied to the main-section connection policy
595 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
597 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
598 by me. Added RFC7919 DH primes as an alternative.
600 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
601 are not in the system include path.
603 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
604 GnuTLS, when a session startup failed (eg because the client disconnected)
605 Exim did stdio operations after fclose. This was exposed by a recent
606 change which nulled out the file handle after the fclose.
608 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
609 signed directly by the cert-signing cert, rather than an intermediate
610 OCSP-signing cert. This is the model used by LetsEncrypt.
612 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
614 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
615 an incoming connection.
617 HS/02 Bug 1802: Do not half-close the connection after sending a request
620 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
621 fallback to "prime256v1".
623 JH/34 SECURITY: Use proper copy of DATA command in error message.
624 Could leak key material. Remotely exploitable. CVE-2016-9963.
630 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
631 and 3.4.4 - once the server is enabled to respond to an OCSP request
632 it does even when not requested, resulting in a stapling non-aware
633 client dropping the TLS connection.
635 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
636 support variable-length bit vectors. No functional change.
638 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
639 The I= interface field on outgoing lines is now after the H= remote
640 host field, same as incoming lines. There is a separate
641 outgoing_interface log selector which allows you to disable the
644 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
645 If not running log_selector +smtp_connection the mainlog would be held
646 open indefinitely after a "too many connections" event, including to a
647 deleted file after a log rotate. Leave the per net connection logging
648 leaving it open for efficiency as that will be quickly detected by the
649 check on the next write.
651 HS/01 Bug 1671: Fix post transport crash.
652 Processing the wait-<transport> messages could crash the delivery
653 process if the message IDs didn't exist for some reason. When
654 using 'split_spool_directory=yes' the construction of the spool
655 file name failed already, exposing the same netto behaviour.
657 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
658 mime_regex ACL conditions.
660 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
661 to DSN fail messages (bounces): remote IP, remote greeting, remote response
662 to HELO, local diagnostic string.
664 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
665 log line to debug. Even when configured with a tls authenticator many
666 client connections are expected to not authenticate in this way, so
667 an authenticate fail is not an error.
669 HS/02 Add the Exim version string to the process info. This way exiwhat
670 gives some more detail about the running daemon.
672 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
673 matter for fast-change records such as DNSBLs.
675 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
676 retry record, even if constant. There may be multiple transports with
677 different interface settings and the retry behaviour needs to be kept
680 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
682 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
684 JH/10 Bug 840: fix log_defer_output option of pipe transport
686 JH/11 Bug 830: use same host for all RCPTS of a message, even under
687 hosts_randomize. This matters a lot when combined with mua_wrapper.
689 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
690 ${quote_pgsql:<string>} operator.
692 JH/13 Bug 1708: avoid misaligned access in cached lookup.
694 JH/14 Change header file name for freeradius-client. Relevant if compiling
695 with Radius support; from the Gentoo tree and checked under Fedora.
697 JH/15 Bug 1712: Introduce $prdr_requested flag variable
699 JH/16 Bug 1714: Permit an empty string as expansion result for transport
700 option transport_filter, meaning no filtering.
702 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
704 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
705 defaults to "*" (all hosts). The variable is now available when not built
706 with TLS, default unset, mainly to enable keeping the testsuite sane.
707 If a server certificate is not supplied (via tls_certificate) an error is
708 logged, and clients will find TLS connections fail on startup. Presumably
709 they will retry in-clear.
710 Packagers of Exim are strongly encouraged to create a server certificate
711 at installation time.
713 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
714 with the $config_file variable.
716 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
717 in transport context, after the attempt, and per-recipient. The latter type
718 is per host attempted. The event data is the error message, and the errno
719 information encodes the lookup type (A vs. MX) used for the (first) host,
720 and the trailing two digits of the smtp 4xx response.
722 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
723 to write to mainlog (or rejectlog, paniclog) in the window between file
724 creation and permissions/ownership being changed. Particularly affects
725 installations where exicyclog is run as root, rather than exim user;
726 result is that the running daemon panics and dies.
728 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
730 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
731 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
732 "pri" and "weight". Note that the previous implicit priority given by the
733 list order is no longer honoured.
735 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
738 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
739 by defining SUPPORT_SOCKS.
741 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
742 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
743 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
744 variables are renamed to proxy_{local,external}_{address,port}.
746 JH/27 Move Internationalisation support from Experimental to mainline, enabled
747 for a build by defining SUPPORT_I18N
749 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
750 of the query string, and make ${quote_redis:} do that quoting.
752 JH/29 Move Events support from Experimental to mainline, enabled by default
753 and removable for a build by defining DISABLE_EVENT.
755 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
757 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
758 cached by the daemon.
760 JH/32 Move Redis support from Experimental to mainline, enabled for a build
761 by defining LOOKUP_REDIS. The libhiredis library is required.
763 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
764 keys are given for lookup.
766 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
767 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
768 only supported when built with TLS support. The PolarSSL SHA routines
769 are still used when the TLS library is too old for convenient support.
771 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
772 openssl_options), for security. OpenSSL forces this from version 1.1.0
773 server-side so match that on older versions.
775 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
776 allocation for $value could be released as the expansion processing
777 concluded, but leaving the global pointer active for it.
779 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
780 and to use the domains and local_parts ACL conditions.
782 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
783 incorrectly not doubled on cutthrough transmission, hence seen as a
784 body-termination at the receiving system - resulting in truncated mails.
785 Commonly the sender saw a TCP-level error, and retransmitted the message
786 via the normal store-and-forward channel. This could result in duplicates
787 received - but deduplicating mailstores were liable to retain only the
788 initial truncated version.
790 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
792 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
794 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
795 we're in there, support oversigning also; bug 1309.
797 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
799 HS/04 Add support for keep_environment and add_environment options.
801 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
802 either intentional arithmetic overflow during PRNG, or testing config-
805 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
806 delivery resulted in actual delivery. Cancel cutthrough before DATA
809 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
810 rejects a recipient: pass the reject to the originator.
812 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
813 Many were false-positives and ignorable, but it's worth fixing the
816 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
817 for the new environment-manipulation done at startup. Move the routines
818 from being local to tls.c to being global via the os.c file.
820 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
821 an extract embedded as result-arg for a map, the first arg for extract
822 is unavailable so we cannot tell if this is a numbered or keyed
823 extraction. Accept either.
829 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
832 JH/02 The smtp transport option "multi_domain" is now expanded.
834 JH/03 The smtp transport now requests PRDR by default, if the server offers
837 JH/04 Certificate name checking on server certificates, when exim is a client,
838 is now done by default. The transport option tls_verify_cert_hostnames
839 can be used to disable this per-host. The build option
840 EXPERIMENTAL_CERTNAMES is withdrawn.
842 JH/05 The value of the tls_verify_certificates smtp transport and main options
843 default to the word "system" to access the system default CA bundle.
844 For GnuTLS, only version 3.0.20 or later.
846 JH/06 Verification of the server certificate for a TLS connection is now tried
847 (but not required) by default. The verification status is now logged by
848 default, for both outbound TLS and client-certificate supplying inbound
851 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
854 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
855 Status Notification (bounce) messages are now MIME format per RFC 3464.
856 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
857 under the control of the dsn_advertise_hosts option, and routers may
858 have a dsn_lasthop option.
860 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
861 default, modifiable by a malware= option. The list separator for
862 the options can now be changed in the usual way. Bug 68.
864 JH/10 The smtp_receive_timeout main option is now expanded before use.
866 JH/11 The incoming_interface log option now also enables logging of the
867 local interface on delivery outgoing connections.
869 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
870 if the interface and destination host and port all match.
872 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
875 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
876 Patch from Andrew Lewis.
878 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
879 now supports optional time-restrictions, weighting, and priority
880 modifiers per server. Patch originally by <rommer@active.by>.
882 JH/16 The spamd_address main option now supports a mixed list of local
883 and remote servers. Remote servers can be IPv6 addresses, and
884 specify a port-range.
886 JH/17 Bug 68: The spamd_address main option now supports an optional
887 timeout value per server.
889 JH/18 Bug 1581: Router and transport options headers_add/remove can
890 now have the list separator specified.
892 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
895 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
898 JH/21 Support for the A6 type of dns record is withdrawn.
900 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
901 rather than the verbs used.
903 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
904 from 255 to 1024 chars.
906 JH/24 Verification callouts now attempt to use TLS by default.
908 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
909 are generic router options now. The defaults didn't change.
911 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
912 Original patch from Alexander Shikoff, worked over by JH.
914 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
915 files if ZCAT_COMMAND is not executable.
917 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
919 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
921 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
922 Normally benign, it bites when the pair was led to by a CNAME;
923 modern usage is to not canonicalize the domain to a CNAME target
924 (and we were inconsistent anyway for A-only vs AAAA+A).
926 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
928 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
929 when evaluating $sender_host_dnssec.
931 JH/31 Check the HELO verification lookup for DNSSEC, adding new
932 $sender_helo_dnssec variable.
934 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
936 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
938 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
940 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
941 documented as working, but never had. Support all but $spam_report.
943 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
944 added for tls authenticator.
946 HS/03 Add perl_taintmode main config option
952 TL/01 When running the test suite, the README says that variables such as
953 no_msglog_check are global and can be placed anywhere in a specific
954 test's script, however it was observed that placement needed to be near
955 the beginning for it to behave that way. Changed the runtest perl
956 script to read through the entire script once to detect and set these
957 variables, reset to the beginning of the script, and then run through
958 the script parsing/test process like normal.
960 TL/02 The BSD's have an arc4random API. One of the functions to induce
961 adding randomness was arc4random_stir(), but it has been removed in
962 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
963 function when detected.
965 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
966 cause callback expansion.
968 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
969 syntax errors in an expansion can be treated as a string instead of
970 logging or causing an error, due to the internal use of bool_lax
971 instead of bool when processing it.
973 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
974 server certificates when making smtp deliveries.
976 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
978 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
980 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
982 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
983 Merged patch from Sebastian Wiedenroth.
985 JH/05 Fix results-pipe from transport process. Several recipients, combined
986 with certificate use, exposed issues where response data items split
987 over buffer boundaries were not parsed properly. This eventually
988 resulted in duplicates being sent. This issue only became common enough
989 to notice due to the introduction of connection certificate information,
990 the item size being so much larger. Found and fixed by Wolfgang Breyha.
992 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
993 size buffer was used, resulting in syntax errors when an expansion
996 JH/07 Add support for directories of certificates when compiled with a GnuTLS
997 version 3.3.6 or later.
999 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1000 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1001 both become "event_action", the variables become $event_name, $event_data
1002 and $event_defer_errno. There is a new variable $verify_mode, usable in
1003 routers, transports and related events. The tls:cert event is now also
1004 raised for inbound connections, if the main configuration event_action
1007 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1008 early OCSP support, but no stapling (appears to be less than 1.0.0).
1010 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1011 server certificate names available under the smtp transport option
1012 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1015 JH/10 Time-related extraction expansions from certificates now use the main
1016 option "timezone" setting for output formatting, and are consistent
1017 between OpenSSL and GnuTLS compilations. Bug 1541.
1019 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1020 encoded parameter in the incoming message. Bug 1558.
1022 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1023 include certificate info, eximon was claiming there were spoolfile
1026 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1028 JH/14 Log delivery-related information more consistently, using the sequence
1029 "H=<name> [<ip>]" wherever possible.
1031 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1032 are problematic for Debian distribution, omit them from the release
1035 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1037 JH/16 Fix string representation of time values on 64bit time_t architectures.
1040 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1041 output list separator was used.
1046 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1047 checkers that were complaining about end of non-void function with no
1050 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1051 This was a regression introduced in 4.83 by another bugfix.
1053 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1055 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1056 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1062 TF/01 Correctly close the server side of TLS when forking for delivery.
1064 When a message was received over SMTP with TLS, Exim failed to clear up
1065 the incoming connection properly after forking off the child process to
1066 deliver the message. In some situations the subsequent outgoing
1067 delivery connection happened to have the same fd number as the incoming
1068 connection previously had. Exim would try to use TLS and fail, logging
1069 a "Bad file descriptor" error.
1071 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1072 utilities have not been installed.
1074 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1075 temporary space as the ACL may create new global variables.
1077 TL/01 LDAP support uses per connection or global context settings, depending
1078 upon the detected version of the libraries at build time.
1080 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1081 to extract and use the src ip:port in logging and expansions as if it
1082 were a direct connection from the outside internet. PPv2 support was
1083 updated based on HAProxy spec change in May 2014.
1085 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1087 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1088 Properly escape header and check for NULL return.
1090 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1093 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1095 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1096 characters in header names, implemented as a verify condition.
1097 Contributed by Michael Fischer v. Mollard.
1099 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1100 results permerror and temperror. Previous values are deprecated but
1101 still accepted. In a future release, err_perm and err_temp will be
1102 completely removed, which will be a backward incompatibility if the
1103 ACL tests for either of these two old results. Patch contributed by
1104 user bes-internal on the mailing list.
1106 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1108 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1109 selectors, in both main and reject logs.
1111 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1114 JH/07 Add malware type "sock" for talking to simple daemon.
1116 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1118 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1119 routers/transports under cutthrough routing.
1121 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1122 numbers. Touch up "bool" conditional to keep the same definition.
1124 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1126 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1128 JH/12 Expand items in router/transport headers_add or headers_remove lists
1129 individually rather than the list as a whole. Bug 1452.
1131 Required for reasonable handling of multiple headers_ options when
1132 they may be empty; requires that headers_remove items with embedded
1133 colons must have them doubled (or the list-separator changed).
1135 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1136 view the policy declared in the DMARC record. Currently, $dmarc_status
1137 is a combined value of both the record presence and the result of the
1140 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1142 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1143 dnslookup router and the smtp transport (applying to the forward
1146 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1147 of ldap servers used for a specific lookup. Patch provided by Heiko
1150 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1151 New variable $lookup_dnssec_authenticated for observability.
1153 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1154 Patch submitted by Lars Timman.
1156 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1158 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1159 Requires trusted mode and valid format message id, aborts otherwise.
1160 Patch contributed by Heiko Schlichting.
1162 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1163 certextract with support for various fields. Bug 1358.
1165 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1166 is requested by default, modifiable by smtp transport option
1169 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1170 operate on certificate variables to give certificate fingerprints
1171 Also new ${sha256:cert_variable}.
1173 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1175 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1176 Christian Aistleitner.
1178 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1180 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1181 file. Patch from Wolfgang Breyha.
1183 JH/25 Expand the coverage of the delivery $host and $host_address to
1184 client authenticators run in verify callout. Bug 1476.
1186 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1187 align with daemon_smtp_ports. Bug 72.
1189 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1190 support and error reporting did not work properly.
1192 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1193 and is readable. Patch from Andrew Colin Kissa.
1195 TL/14 Enhance documentation of ${run expansion and how it parses the
1196 commandline after expansion, particularly in the case when an
1197 unquoted variable expansion results in an empty value.
1199 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1201 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1202 by renaming away from it. Addresses GH issue 15, reported by
1205 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1207 TL/15 SECURITY: prevent double expansion in math comparison functions
1208 (can expand unsanitized data). Not remotely exploitable.
1215 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1217 PP/02 Make -n do something, by making it not do something.
1218 When combined with -bP, the name of an option is not output.
1220 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1223 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1224 $sender_host_name and config options to manage this, and basic check
1227 PP/05 DSCP support for outbound connections and control modifier for inbound.
1229 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1230 (Only plugin which currently uses this is kerberos4, which nobody should
1231 be using, but we should make it available and other future plugins might
1232 conceivably use it, even though it would break NAT; stuff *should* be
1233 using channel bindings instead).
1235 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1236 name; added for Sendmail compatibility; requires admin caller.
1237 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1238 just ignore it); requires trusted caller.
1239 Also parse but ignore: -Ac -Am -X<logfile>
1242 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1244 TL/02 Add +smtp_confirmation as a default logging option.
1246 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1247 Patch by Magnus Holmgren from 2007-02-20.
1249 TL/04 Bugzilla 1281 - Spec typo.
1250 Bugzilla 1283 - Spec typo.
1251 Bugzilla 1290 - Spec grammar fixes.
1253 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1255 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1257 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1258 mailing list by by Dmitry Isaikin.
1260 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1262 JH/02 Support "G" suffix to numbers in ${if comparisons.
1264 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1266 NM/01 Bugzilla 1197 - Spec typo
1267 Bugzilla 1196 - Spec examples corrections
1269 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1271 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1272 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1275 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1276 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1278 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1279 "acl {{name}{arg}...}", and optional args on acl condition
1282 JH/05 Permit multiple router/transport headers_add/remove lines.
1284 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1286 JH/07 Avoid using a waiting database for a single-message-only transport.
1287 Performance patch from Paul Fisher. Bugzilla 1262.
1289 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1292 JH/09 Add $headers_added variable, with content from use of ACL modifier
1293 add_header (but not yet added to the message). Bugzilla 199.
1295 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1296 Pulled from Bugzilla 817 by Wolfgang Breyha.
1298 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1300 (nb: this is the same fix as in Exim 4.80.1)
1302 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1305 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1308 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1310 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1311 advertise SMTP AUTH mechanism to us, instead of a generic
1312 protocol violation error. Also, make Exim more robust to bad
1313 data from the Dovecot auth socket.
1315 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1317 When a queue runner is handling a message, Exim first routes the
1318 recipient addresses, during which it prunes them based on the retry
1319 hints database. After that it attempts to deliver the message to
1320 any remaining recipients. It then updates the hints database using
1323 So if a recipient address works intermittently, it can get repeatedly
1324 deferred at routing time. The retry hints record remains fresh so the
1325 address never reaches the final cutoff time.
1327 This is a fairly common occurrence when a user is bumping up against
1328 their storage quota. Exim had some logic in its local delivery code
1329 to deal with this. However it did not apply to per-recipient defers
1330 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1332 This change adds a proper retry rule check during routing so that the
1333 final cutoff time is checked against the message's age. We only do
1334 this check if there is an address retry record and there is not a
1335 domain retry record; this implies that previous attempts to handle
1336 the address had the retry_use_local_parts option turned on. We use
1337 this as an approximation for the destination being like a local
1338 delivery, as in LMTP.
1340 I suspect this new check makes the old local delivery cutoff check
1341 redundant, but I have not verified this so I left the code in place.
1343 TF/02 Correct gecos expansion when From: is a prefix of the username.
1345 Test 0254 submits a message to Exim with the header
1349 When I ran the test suite under the user fanf2, Exim expanded
1350 the header to contain my full name, whereas it should have added
1351 a Resent-Sender: header. It erroneously treats any prefix of the
1352 username as equal to the username.
1354 This change corrects that bug.
1356 GF/01 DCC debug and logging tidyup
1357 Error conditions log to paniclog rather than rejectlog.
1358 Debug lines prefixed by "DCC: " to remove any ambiguity.
1360 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1362 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1363 Bug spotted by Jeremy Harris; was flawed since initial commit.
1364 Would have resulted in OCSP responses post-SNI triggering an Exim
1365 NULL dereference and crash.
1367 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1369 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1370 Bug detection, analysis and fix by Samuel Thibault.
1371 Bugzilla 1331, Debian bug #698092.
1373 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1375 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1376 Server implementation by Todd Lyons, client by JH.
1377 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1378 config variable "prdr_enable" controls whether the server
1379 advertises the facility. If the client requests PRDR a new
1380 acl_data_smtp_prdr ACL is called once for each recipient, after
1381 the body content is received and before the acl_smtp_data ACL.
1382 The client is controlled by both of: a hosts_try_prdr option
1383 on the smtp transport, and the server advertisement.
1384 Default client logging of deliveries and rejections involving
1385 PRDR are flagged with the string "PRDR".
1387 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1388 fclose(). Diagnosis by Todd Lyons.
1390 PP/17 Update configure.default to handle IPv6 localhost better.
1391 Patch by Alain Williams (plus minor tweaks).
1394 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1395 This is now consistent with GnuTLS, and is now documented: the
1396 previous undocumented portable approach to treating the option as
1397 unset was to force an expansion failure. That still works, and
1398 an empty string is now equivalent.
1400 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1401 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1402 not performing validation itself.
1404 PP/20 Added force_command boolean option to pipe transport.
1405 Patch from Nick Koston, of cPanel Inc.
1407 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1410 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1412 PP/21 Fix eximon continuous updating with timestamped log-files.
1413 Broken in a format-string cleanup in 4.80, missed when I repaired the
1414 other false fix of the same issue.
1415 Report and fix from Heiko Schlichting.
1418 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1419 Report from Prashanth Katuri.
1421 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1422 It's SecureTransport, so affects any MacOS clients which use the
1423 system-integrated TLS libraries, including email clients.
1425 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1426 using a MIME ACL for non-SMTP local injection.
1427 Report and assistance in diagnosis by Warren Baker.
1429 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1431 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1433 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1434 last id that failed so it may be referenced in subsequent ACL's.
1436 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1439 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1440 ldap library initialization, allowing self-signed CA's to be
1441 used. Also properly sets require_cert option later in code by
1442 using NULL (global ldap config) instead of ldap handle (per
1443 session). Bug diagnosis and testing by alxgomz.
1445 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1446 the src/util/ subdirectory.
1448 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1449 renamed to Transport Post Delivery Action by Jeremy Harris, as
1452 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1453 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1454 redis_servers = needs to be configured which will be used by the redis
1455 lookup. Patch from Warren Baker, of The Packet Hub.
1457 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1459 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1460 hostname or reverse DNS when processing a host list. Used suggestions
1461 from multiple comments on this bug.
1463 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1465 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1466 Missed a few lines, added it to make the runtest require no keyboard
1469 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1470 contains upper case chars. Make router use caseful_local_part.
1472 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1473 support when GnuTLS has been built with p11-kit.
1479 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1481 This, or similar/improved, will also be change PP/11 of 4.82.
1487 PP/01 Handle short writes when writing local log-files.
1488 In practice, only affects FreeBSD (8 onwards).
1489 Bugzilla 1053, with thanks to Dmitry Isaikin.
1491 NM/01 Bugzilla 949 - Documentation tweak
1493 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1496 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1498 PP/02 Implemented gsasl authenticator.
1500 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1502 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1503 `pkg-config foo` for cflags/libs.
1505 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1506 with rest of GSASL and with heimdal_gssapi.
1508 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1509 `pkg-config foo` for cflags/libs for the TLS implementation.
1511 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1512 properties get this fed in as external SSF. A number of robustness
1513 and debugging improvements to the cyrus_sasl authenticator.
1515 PP/08 cyrus_sasl server now expands the server_realm option.
1517 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1518 Patch by Jeremy Harris.
1520 PP/10 Added dbmjz lookup type.
1522 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1524 PP/12 MAIL args handles TAB as well as SP, for better interop with
1525 non-compliant senders.
1526 Analysis and variant patch by Todd Lyons.
1528 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1529 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1530 Patch from Dirk Mueller <dmueller@suse.com>
1532 PP/13 tls_peerdn now print-escaped for spool files.
1533 Observed some $tls_peerdn in wild which contained \n, which resulted
1534 in spool file corruption.
1536 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1537 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1538 or write after TLS renegotiation, which otherwise led to messages
1541 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1542 as a tracking header (ie: a signed header comes before the signature).
1543 Patch from Wolfgang Breyha.
1545 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1546 comma-sep list; embedded commas doubled.
1548 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1550 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1552 Report and patch from Dmitry Banschikov.
1554 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1555 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1556 failures. We appear to now support TLS1.1+ with Exim.
1558 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1559 lets Exim select keys and certificates based upon TLS SNI from client.
1560 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1561 before an outbound SMTP session. New log_selector, +tls_sni.
1563 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1564 NULL dereference. Report and patch from Alun Jones.
1566 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1567 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1568 Not seeing resolver debug output on NetBSD, but suspect this is a
1569 resolver implementation change.
1571 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1572 Left warnings. Added "eximon gdb" invocation mode.
1574 PP/21 Defaulting "accept_8bitmime" to true, not false.
1576 PP/22 Added -bw for inetd wait mode support.
1578 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1579 locate the relevant includes and libraries. Made this the default.
1581 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1582 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1584 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1585 This may cause build issues on older platforms.
1587 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1588 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1589 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1590 Added SNI support via GnuTLS too.
1591 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1593 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1595 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1596 Applied second patch from Janne, implementing suggestion to default
1597 multiple-strings-in-record handling to match SPF spec.
1599 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1601 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1602 read-only, out of scope).
1603 Patch from Wolfgang Breyha, report from Stuart Northfield.
1605 PP/29 Fix three issues highlighted by clang analyser static analysis.
1606 Only crash-plausible issue would require the Cambridge-specific
1607 iplookup router and a misconfiguration.
1608 Report from Marcin Mirosław.
1610 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1612 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1613 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1614 As part of this, removing so much warning spew let me fix some minor
1615 real issues in debug logging.
1617 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1618 assignment on my part. Fixed.
1620 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1621 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1622 Janne Snabb (who went above and beyond: thank you).
1624 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1625 string otherwise requires a connection and a bunch more work and it's
1626 relatively easy to get wrong. Should also expose TLS library linkage
1629 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1630 64-bit ${eval} (JH/03).
1632 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1633 GNU libc to support some of the 64-bit stuff, should not lead to
1634 conflicts. Defined before os.h is pulled in, so if a given platform
1635 needs to override this, it can.
1637 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1638 protection layer was required, which is not implemented.
1639 Bugzilla 1254, patch from Wolfgang Breyha.
1641 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1642 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1643 tls_dhparam take prime identifiers. Also unbreak combination of
1644 OpenSSL+DH_params+TLSSNI.
1646 PP/39 Disable SSLv2 by default in OpenSSL support.
1652 PP/01 Solaris build fix for Oracle's LDAP libraries.
1653 Bugzilla 1109, patch from Stephen Usher.
1655 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1657 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1660 TF/02 Fix a couple more cases where we did not log the error message
1661 when unlink() failed. See also change 4.74-TF/03.
1663 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1664 lock up or crash if it happened to be inside a call to libc when it
1665 got a SIGUSR1 from exiwhat.
1667 The SIGUSR1 handler appends the current process status to the process
1668 log which is later printed by exiwhat. It used to use the general
1669 purpose logging code to do this, but several functions it calls are
1670 not safe for signals.
1672 The new output code in the SIGUSR1 handler is specific to the process
1673 log, and simple enough that it's easy to inspect for signal safety.
1674 Removing some special cases also simplifies the general logging code.
1675 Removing the spurious timestamps from the process log simplifies
1678 TF/04 Improved ratelimit ACL condition.
1680 The /noupdate option has been deprecated in favour of /readonly which
1681 has clearer semantics. The /leaky, /strict, and /readonly update modes
1682 are mutually exclusive. The update mode is no longer included in the
1683 database key; it just determines when the database is updated. (This
1684 means that when you upgrade Exim will forget old rate measurements.)
1686 Exim now checks that the per_* options are used with an update mode that
1687 makes sense for the current ACL. For example, when Exim is processing a
1688 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1689 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1690 must specify per_mail/readonly. If you omit the update mode it defaults to
1691 /leaky where that makes sense (as before) or /readonly where required.
1693 The /noupdate option is now undocumented but still supported for
1694 backwards compatibility. It is equivalent to /readonly except that in
1695 ACLs where /readonly is required you may specify /leaky/noupdate or
1696 /strict/noupdate which are treated the same as /readonly.
1698 A useful new feature is the /count= option. This is a generalization
1699 of the per_byte option, so that you can measure the throughput of other
1700 aggregate values. For example, the per_byte option is now equivalent
1701 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1703 The per_rcpt option has been generalized using the /count= mechanism
1704 (though it's more complicated than the per_byte equivalence). When it is
1705 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1706 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1707 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1708 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1709 Note that using per_rcpt with a non-readonly update mode in more than
1710 one ACL will cause the recipients to be double-counted. (The per_mail
1711 and per_byte options don't have this problem.)
1713 The handling of very low rates has changed slightly. If the computed rate
1714 is less than the event's count (usually one) then this event is the first
1715 after a long gap. In this case the rate is set to the same as this event's
1716 count, so that the first message of a spam run is counted properly.
1718 The major new feature is a mechanism for counting the rate of unique
1719 events. The new per_addr option counts the number of different
1720 recipients that someone has sent messages to in the last time period. It
1721 behaves like per_rcpt if all the recipient addresses are different, but
1722 duplicate recipient addresses do not increase the measured rate. Like
1723 the /count= option this is a general mechanism, so the per_addr option
1724 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1725 example, measure the rate that a client uses different sender addresses
1726 with the options per_mail/unique=$sender_address. There are further
1727 details in the main documentation.
1729 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1731 TF/06 Removed a few PCRE remnants.
1733 TF/07 Automatically extract Exim's version number from tags in the git
1734 repository when doing development or release builds.
1736 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1737 Bugzilla 879. Patch from Paul Fisher.
1739 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1740 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1743 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1745 PP/05 Variable $av_failed, true if the AV scanner deferred.
1746 Bugzilla 1078. Patch from John Horne.
1748 PP/06 Stop make process more reliably on build failure.
1749 Bugzilla 1087. Patch from Heiko Schlittermann.
1751 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1752 Bugzilla 1089. Patch from Heiko Schlittermann.
1754 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1755 Bugzilla 1131. Patch from Holger Weiß.
1757 PP/09 Handle IPv6 addresses with SPF.
1758 Bugzilla 860. Patch from Wolfgang Breyha.
1760 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1762 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1765 PP/11 match_* no longer expand right-hand-side by default.
1766 New compile-time build option, EXPAND_LISTMATCH_RHS.
1767 New expansion conditions, "inlist", "inlisti".
1769 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1771 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1773 PP/14 fix log_write() format string regression from TF/03.
1774 Bugzilla 1152. Patch from Dmitry Isaikin.
1780 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1782 PP/02 Harmonised TLS library version reporting; only show if debugging.
1783 Layout now matches that introduced for other libraries in 4.74 PP/03.
1785 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1787 PP/04 New "dns_use_edns0" global option.
1789 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1792 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1793 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1795 TK/01 Updated PolarSSL code to 0.14.2.
1796 Bugzilla 1097. Patch from Andreas Metzler.
1798 PP/07 Catch divide-by-zero in ${eval:...}.
1799 Fixes bugzilla 1102.
1801 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1804 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1805 format-string attack -- SECURITY: remote arbitrary code execution.
1807 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1808 time unintentionally subject to list matching rules, letting the header
1809 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1810 arbitrary string expansion). This allowed for information disclosure.
1812 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1813 INT_MIN/-1 -- value coerced to INT_MAX.
1819 NM/01 Workaround for PCRE version dependency in version reporting
1822 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1823 This fixes portability to compilers other than gcc, notably
1824 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1826 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1827 makefiles for portability to HP-UX and POSIX correctness.
1829 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1830 Also via indented variable definition in the Makefile.
1831 (Debugging by Oliver Heesakkers).
1833 PP/02 Restore caching of spamd results with expanded spamd_address.
1834 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1836 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1837 Improves build reliability. Fix from: Frank Elsner
1839 NM/02 Fix wide character breakage in the rfc2047 coding
1840 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1842 NM/03 Allow underscore in dnslist lookups
1843 Fixes bug 1026. Patch from Graeme Fowler
1845 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1846 Code patches from Adam Ciarcinski of NetBSD.
1848 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1851 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1852 is logged, to avoid truncation. Patch from John Horne.
1854 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1855 Patch from Jakob Hirsch.
1857 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1858 SQL string expansion failure details.
1859 Patch from Andrey Oktyabrski.
1861 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1862 Patch from Simon Arlott.
1864 PP/09 New lookups functionality failed to compile on old gcc which rejects
1865 extern declarations in function scope.
1866 Patch from Oliver Fleischmann
1868 PP/10 Use sig_atomic_t for flags set from signal handlers.
1869 Check getgroups() return and improve debugging.
1870 Fixed developed for diagnosis in bug 927 (which turned out to be
1873 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1874 Patch from Mark Zealey.
1876 PP/12 Bugzilla 1056: Improved spamd server selection.
1877 Patch from Mark Zealey.
1879 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1880 Based on patch from Heiko Schlittermann.
1882 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1883 Patch from Uwe Doering, sign-off by Michael Haardt.
1885 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1886 variable declaration deep within a block. Bug and patch from
1889 PP/15 lookups-Makefile IRIX compatibility coercion.
1891 PP/16 Make DISABLE_DKIM build knob functional.
1893 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1894 Patch by Simon Arlott
1896 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1897 variable argument macros. Our copy now differs from upstream.
1903 TF/01 Failure to get a lock on a hints database can have serious
1904 consequences so log it to the panic log.
1906 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1907 controlled using the smtp_confirmation log selector.
1909 TF/03 Include the error message when we fail to unlink a spool file.
1911 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1912 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1913 for maintaining out-of-tree patches for some time.
1915 PP/01 Bugzilla 139: Documentation and portability issues.
1916 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1917 Handle per-OS dynamic-module compilation flags.
1919 PP/02 Let /dev/null have normal permissions.
1920 The 4.73 fixes were a little too stringent and complained about the
1921 permissions on /dev/null. Exempt it from some checks.
1922 Reported by Andreas M. Kirchwitz.
1924 PP/03 Report version information for many libraries, including
1925 Exim version information for dynamically loaded libraries. Created
1926 version.h, now support a version extension string for distributors
1927 who patch heavily. Dynamic module ABI change.
1929 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1930 privilege escalation vulnerability whereby the Exim run-time user
1931 can cause root to append content of the attacker's choosing to
1934 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1937 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1938 If dropping privileges for untrusted macros, we disabled normal logging
1939 on the basis that it would fail; for the Exim run-time user, this is not
1940 the case, and it resulted in successful deliveries going unlogged.
1941 Fixed. Reported by Andreas Metzler.
1947 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1948 only prepend for the Resent-* case. Fixes regression introduced in
1949 Exim 4.70 by NM/22 for Bugzilla 607.
1951 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1952 increasing numbers of administrators be bitten by this.
1954 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1956 PP/03 Bugzilla 994: added openssl_options main configuration option.
1958 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1960 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1962 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1964 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1965 without a peer certificate, leading to a segfault because of an
1966 assumption that peers always have certificates. Be a little more
1967 paranoid. Problem reported by Martin Tscholak.
1969 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1970 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1971 NB: ClamAV planning to remove STREAM in "middle of 2010".
1972 CL also introduces -bmalware, various -d+acl logging additions and
1973 more caution in buffer sizes.
1975 PP/09 Implemented reverse_ip expansion operator.
1977 PP/10 Bugzilla 937: provide a "debug" ACL control.
1979 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1981 PP/12 Bugzilla 973: Implement --version.
1983 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1985 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1987 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1989 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1990 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1991 ignore trailing whitespace.
1993 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1995 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1998 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1999 Notification from Dr Andrew Aitchison.
2001 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2002 ExtendedDetectionInfo response format.
2003 Notification from John Horne.
2005 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2008 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2009 XSL and documented dependency on system catalogs, with examples of how
2012 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2015 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2016 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2017 configuration file which is writeable by the Exim user or group.
2019 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2020 of configuration files to cover files specified with the -C option if
2021 they are going to be used with root privileges, not just the default
2024 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2025 option (effectively making it always true).
2027 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2028 files to be used while preserving root privileges.
2030 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2031 that rogue child processes cannot use them.
2033 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2034 run-time user, instead of root.
2036 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2037 Exim run-time user without dropping privileges.
2039 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2040 result string, instead of calling string_vformat() twice with the same
2043 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2044 for other users. Others should always drop root privileges if they use
2045 -C on the command line, even for a whitelisted configure file.
2047 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2049 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2055 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2056 $data_path, and $header_path variables; fixed documentation bugs and
2059 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2060 exipick to access non-standard spools, including the "frozen" queue
2063 NM/01 Bugzilla 965: Support mysql stored procedures.
2064 Patch from Alain Williams
2066 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2068 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2069 Patch from Andreas Metzler
2071 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2072 Patch from Kirill Miazine
2074 NM/05 Bugzilla 671: Added umask to procmail example.
2076 JJ/03 installed exipick 20100323.0, fixing doc bug
2078 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2079 directory. Notification and patch from Dan Rosenberg.
2081 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2083 TK/02 Improve log output when DKIM signing operation fails.
2085 MH/01 Treat the transport option dkim_domain as a colon separated
2086 list, not as a single string, and sign the message with each element,
2087 omitting multiple occurences of the same signer.
2089 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2090 Bugzilla 985, 986. Patch by Simon Arlott
2092 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2093 Patch by Simon Arlott
2095 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2096 MBX locking. Notification from Dan Rosenberg.
2102 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2104 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2106 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2108 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2110 NM/04 Bugzilla 915: Flag broken perl installation during build.
2116 TK/01 Added patch by Johannes Berg that expands the main option
2117 "spamd_address" if it starts with a dollar sign.
2119 TK/02 Write list of recipients to X-Envelope-Sender header when building
2120 the mbox-format spool file for content scanning (suggested by Jakob
2123 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2124 (http://www.dcc-servers.net/) support via dccifd. Activated by
2125 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2127 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2128 by Mark Daniel Reidel <mr@df.eu>.
2130 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2131 When building exim an external PCRE library is now needed -
2132 PCRE is a system library on the majority of modern systems.
2133 See entry on PCRE_LIBS in EDITME file.
2135 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2136 conversation. Added nologin parameter to request.
2137 Patch contributed by Kirill Miazine.
2139 TF/01 Do not log submission mode rewrites if they do not change the address.
2141 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2143 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2144 log files in place. Contributed by Roberto Lima.
2146 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2148 TF/03 Bugzilla 615: When checking the local_parts router precondition
2149 after a local_part_suffix or local_part_prefix option, Exim now
2150 does not use the address's named list lookup cache, since this
2151 contains cached lookups for the whole local part.
2153 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2154 Robert Millan. Documentation is in experimental-spec.txt.
2156 TF/04 Bugzilla 668: Fix parallel build (make -j).
2158 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2160 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2161 Patch provided by Jan Srzednicki.
2163 TF/05 Leading white space used to be stripped from $spam_report which
2164 wrecked the formatting. Now it is preserved.
2166 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2167 that they are available at delivery time.
2169 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2171 TF/08 TLS error reporting now respects the incoming_interface and
2172 incoming_port log selectors.
2174 TF/09 Produce a more useful error message if an SMTP transport's hosts
2175 setting expands to an empty string.
2177 NM/06 Bugzilla 744: EXPN did not work under TLS.
2178 Patch provided by Phil Pennock.
2180 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2181 Patch provided by Richard Godbee.
2183 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2184 acl_smtp_notquit, added index entry.
2186 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2187 Patch provided by Eugene Bujak.
2189 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2190 accept(). Patch provided by Maxim Dounin.
2192 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2193 Patch provided by Phil Pennock.
2195 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2197 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2198 Patch provided by Brad "anomie" Jorsch.
2200 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2201 Patch provided by Dean Brooks.
2203 TK/05 Add native DKIM support (does not depend on external libraries).
2205 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2206 Patch provided by Graeme Fowler.
2208 NM/16 Bugzilla 851: Documentation example syntax fix.
2210 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2212 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2215 NM/19 Bugzilla 745: TLS version reporting.
2216 Patch provided by Phil Pennock.
2218 NM/20 Bugzilla 167: bool: condition support.
2219 Patch provided by Phil Pennock.
2221 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2222 clients. Patch provided by Phil Pennock.
2224 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2225 Patch provided by Brad "anomie" Jorsch.
2227 NM/23 Bugzilla 687: Fix misparses in eximstats.
2228 Patch provided by Heiko Schlittermann.
2230 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2231 Patch provided by Heiko Schlittermann.
2233 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2234 plus update to original patch.
2236 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2238 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2239 Patch provided by David Brownlee.
2241 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2243 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2245 NM/30 Bugzilla 888: TLS documentation bugfixes.
2247 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2249 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2250 Unlike the original bugzilla I have changed all shell scripts in src tree.
2252 NM/33 Bugzilla 898: Transport filter timeout fix.
2253 Patch by Todd Rinaldo.
2255 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2256 Patch by Serge Demonchaux.
2258 NM/35 Bugzilla 39: Base64 decode bug fixes.
2259 Patch by Jakob Hirsch.
2261 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2263 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2265 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2267 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2273 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2274 ALT-N's libdkim that I have put here:
2275 http://duncanthrax.net/exim-experimental/
2277 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2278 were called 'true' and it seems that C99 defines that as a reserved
2279 keyword to be used with 'bool' variable types. That means you could
2280 not include C99-style headers which use bools without triggering
2281 build errors in sieve.c.
2283 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2284 as mailq or other aliases. Changed the --help handling significantly
2285 to do whats expected. exim_usage() emits usage/help information.
2287 SC/01 Added the -bylocaldomain option to eximstats.
2289 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2291 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2293 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2299 PH/01 Another patch from the Sieve maintainer.
2301 PH/02 When an IPv6 address is converted to a string for single-key lookup
2302 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2303 dots are used instead of colons so that keys in lsearch files need not
2304 contain colons. This was done some time before quoting was made available
2305 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2306 (notated using the quote facility) so as to distinguish them from IPv4
2307 keys. This meant that lookups for IP addresses in host lists did not work
2308 for iplsearch lookups.
2310 This has been fixed by arranging for IPv6 addresses to be expressed with
2311 colons if the lookup type is iplsearch. This is not incompatible, because
2312 previously such lookups could never work.
2314 The situation is now rather anomalous, since one *can* have colons in
2315 ordinary lsearch keys. However, making the change in all cases is
2316 incompatible and would probably break a number of configurations.
2318 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2321 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2322 conversion specification without a maximum field width, thereby enabling
2323 a rogue spamd server to cause a buffer overflow. While nobody in their
2324 right mind would setup Exim to query an untrusted spamd server, an
2325 attacker that gains access to a server running spamd could potentially
2326 exploit this vulnerability to run arbitrary code as the Exim user.
2328 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2329 $primary_hostname instead of what libspf2 thinks the hosts name is.
2331 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2332 a directory entry by the name of the lookup key. Previously, if a
2333 symlink pointed to a non-existing file or a file in a directory that
2334 Exim lacked permissions to read, a lookup for a key matching that
2335 symlink would fail. Now it is enough that a matching directory entry
2336 exists, symlink or not. (Bugzilla 503.)
2338 PH/03 The body_linecount and body_zerocount variables are now exported in the
2341 PH/04 Added the $dnslist_matched variable.
2343 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2344 This means they are set thereafter only if the connection becomes
2347 PH/06 Added the client_condition to authenticators so that some can be skipped
2348 by clients under certain conditions.
2350 PH/07 The error message for a badly-placed control=no_multiline_responses left
2351 "_responses" off the end of the name.
2353 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2355 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2356 (without spaces) instead of just copying the configuration text.
2358 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2360 PH/11 Added $max_received_linelength.
2362 PH/12 Added +ignore_defer and +include_defer to host lists.
2364 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2365 way in which PCRE > 7.0 is built.
2367 PH/14 Implemented queue_only_load_latch.
2369 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2370 MAIL command. The effect was to mangle the value on 64-bit systems.
2372 PH/16 Another patch from the Sieve maintainer.
2374 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2376 PH/18 If a system quota error occurred while trying to create the file for
2377 a maildir delivery, the message "Mailbox is full" was not appended to the
2378 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2379 only to a quota excession during the actual writing of the file.
2381 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2382 characters?) which causes problems in log lines. The DN values are now
2383 passed through string_printing() before being added to log lines.
2385 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2386 and InterBase are left for another time.)
2388 PH/21 Added message_body_newlines option.
2390 PH/22 Guard against possible overflow in moan_check_errorcopy().
2392 PH/23 POSIX allows open() to be a macro; guard against that.
2394 PH/24 If the recipient of an error message contained an @ in the local part
2395 (suitably quoted, of course), incorrect values were put in $domain and
2396 $local_part during the evaluation of errors_copy.
2402 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2403 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2406 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2407 issue a MAIL command.
2409 PH/02 In an ACL statement such as
2411 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2413 if a client was not listed at all, or was listed with a value other than
2414 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2415 the condition was not true (as it should be), so access was not denied.
2416 The bug was that the ! inversion was incorrectly passed on to the second
2417 item. This has been fixed.
2419 PH/03 Added additional dnslists conditions == and =& which are different from
2420 = and & when the dns lookup returns more than one IP address.
2422 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2423 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2425 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2426 FSYNC, which compiles an option called disable_fsync that allows for
2427 bypassing fsync(). The documentation is heavily laced with warnings.
2429 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2431 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2432 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2433 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2434 including adding "make clean"; (3) Added -fPIC when compiling the test
2435 dynamically loaded module, to get rid of a warning.
2437 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2438 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2439 = 0s. The bug is otherwise harmless.
2441 PH/07 There was a bug in the dovecot authenticator such that the value of
2442 $auth1 could be overwritten, and so not correctly preserved, after a
2443 successful authentication. This usually meant that the value preserved by
2444 the server_setid option was incorrect.
2446 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2448 PH/09 Installed PCRE release 7.0.
2450 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2451 run for batched SMTP input. It is now run at the start of every message
2452 in the batch. While fixing this I discovered that the process information
2453 (output by running exiwhat) was not always getting set for -bs and -bS
2454 input. This is fixed, and it now also says "batched" for BSMTP.
2456 PH/11 Added control=no_pipelining.
2458 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2459 patch, slightly modified), and move the expansion of helo_data till after
2460 the connection is made in the smtp transport (so it can use these
2463 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2465 PH/14 Added log_selector = +pid.
2467 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2469 PH/16 Add ${if forany and ${if forall.
2471 PH/17 Added dsn_from option to vary the From: line in DSNs.
2473 PH/18 Flush SMTP output before performing a callout, unless control =
2474 no_callout_flush is set.
2476 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2477 was true (the default) a successful delivery failed to delete the retry
2478 item, thus causing premature timeout of the address. The bug is now
2481 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2483 PH/21 Long custom messages for fakedefer and fakereject are now split up
2484 into multiline responses in the same way that messages for "deny" and
2485 other ACL rejections are.
2487 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2488 with slight modification.
2490 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2491 draft, changing the syntax and factoring some duplicate code".
2493 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2494 for deliveries of the second and subsequent messages over the same SMTP
2497 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2498 ${reduce, with only minor "tidies".
2500 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2502 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2503 expansion side effects.
2505 PH/27 When a message times out after an over-quota error from an Exim-imposed
2506 quota, the bounce message says "mailbox is full". This message was not
2507 being given when it was a system quota that was exceeded. It now should
2510 MH/03 Made $recipients available in local_scan(). local_scan() already has
2511 better access to the recipient list through recipients_list[], but
2512 $recipients can be useful in postmaster-provided expansion strings.
2514 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2515 in the case of a MAIL command with additional options following the
2516 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2517 were accidentally chopped off.
2519 PH/29 SMTP synchronization checks are implemented when a command is read -
2520 there is a check that no more input is waiting when there shouldn't be
2521 any. However, for some commands, a delay in an ACL can mean that it is
2522 some time before the response is written. In this time, more input might
2523 arrive, invalidly. So now there are extra checks after an ACL has run for
2524 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2525 pipelining has not been advertised.
2527 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2529 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2530 returned in the SMTP response when smtp_return_error_details was false.
2531 This has been fixed.
2533 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2534 instead of the C I/O that was originally supplied, because problems were
2535 reported on Solaris.
2537 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2538 Exim which did not show up earlier: it was assuming that a call to
2539 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2540 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2541 was a macro that became an assignment, so it seemed to work. This has
2542 changed to a proper function call with a void return, hence the compile
2543 error. Exim's code has been fixed.
2545 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2548 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2550 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2552 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2553 because it turns out to be too big or there is a timeout) there is no
2554 "Completed" line in the log. When some messages of this type were
2555 selected by exigrep, they were listed as "not completed". Others were
2556 picked up by some special patterns. I have improved the selection
2557 criteria to be more general.
2559 PH/38 The host_find_failed option in the manualroute router can now be set
2560 to "ignore", to completely ignore a host whose IP address cannot be
2561 found. If all hosts are ignored, the behaviour is controlled by the new
2562 host_all_ignored option.
2564 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2565 homing or because of multiple MX records with /mx) generated more than
2566 one IP address, and the following item turned out to be the local host,
2567 all the secondary addresses of the first item were incorrectly removed
2568 from the list, along with the local host and any following hosts (which
2569 is what is supposed to happen).
2571 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2572 whoever called Exim into the -H file. In the case of the daemon it was
2573 behaving confusingly. When first started, it used values for whoever
2574 started the daemon, but after a SIGHUP it used the Exim user (because it
2575 calls itself on a restart). I have changed the code so that it now always
2578 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2579 message are rejected with the same error (e.g. no authentication or bad
2580 sender address), and a DATA command is nevertheless sent (as can happen
2581 with PIPELINING or a stupid MUA), the error message that was given to the
2582 RCPT commands is included in the rejection of the DATA command. This is
2583 intended to be helpful for MUAs that show only the final error to their
2586 PH/42 Another patch from the Sieve maintainer.
2588 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2589 Eximstats - Fixed some broken HTML links and added missing column headers
2591 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2592 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2594 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2596 PH/43 Yet another patch from the Sieve maintainer.
2598 PH/44 I found a way to check for a TCP/IP connection going away before sending
2599 the response to the final '.' that terminates a message, but only in the
2600 case where the client has not sent further data following the '.'
2601 (unfortunately, this is allowed). However, in many cases there won't be
2602 any further data because there won't be any more messages to send. A call
2603 to select() can be used: if it shows that the input is "ready", there is
2604 either input waiting, or the socket has been closed. An attempt to read
2605 the next input character can distinguish the two cases. Previously, Exim
2606 would have sent an OK response which the client would never have see.
2607 This could lead to message repetition. This fix should cure that, at
2608 least in a lot of common cases.
2610 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2611 advertised in response to EHLO.
2617 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2618 fixed by 4.65/MH/01 (is this a record?) are fixed:
2620 (i) An empty string was always treated as zero by the numeric comparison
2621 operators. This behaviour has been restored.
2623 (ii) It is documented that the numeric comparison operators always treat
2624 their arguments as decimal numbers. This was broken in that numbers
2625 starting with 0 were being interpreted as octal.
2627 While fixing these problems I realized that there was another issue that
2628 hadn't been noticed. Values of message_size_limit (both the global option
2629 and the transport option) were treated as octal if they started with 0.
2630 The documentation was vague. These values are now always treated as
2631 decimal, and I will make that clear in the documentation.
2637 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2638 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2641 MH/01 Don't check that the operands of numeric comparison operators are
2642 integers when their expansion is in "skipping" mode (fixes bug
2643 introduced by 4.64-PH/07).
2645 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2646 child addresses, Exim now panics and dies. Previously, because the count
2647 is held in a short int, deliveries were likely to be lost. As such a
2648 large number of recipients for a single message is ridiculous
2649 (performance will be very, very poor), I have chosen to impose a limit
2650 rather than extend the field.
2656 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2657 leftover -K file (the existence of which was triggered by #402).
2658 While we were at it, introduced process PID as part of the -K
2659 filename. This should rule out race conditions when creating
2662 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2663 processing considerably. Previous code took too long for large mails,
2664 triggering a timeout which in turn triggers #401.
2666 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2667 in the DK code in transports.c. sendfile() is not really portable,
2668 hence the _LINUX specificness.
2670 TF/01 In the add_headers option to the mail command in an Exim filter,
2671 there was a bug that Exim would claim a syntax error in any
2672 header after the first one which had an odd number of characters
2675 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2676 callout verification, Exim cached a "reject" for the entire domain. This
2677 is correct for most verifications, but it is not correct for a recipient
2678 verification with use_sender or use_postmaster set, because in that case
2679 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2680 case of MAIL FROM:<> rejection from other early rejections (e.g.
2681 rejection of HELO). When verifying a recipient using a non-null MAIL
2682 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2683 Whatever the result of the callout, the value of the domain cache is
2684 left unchanged (for any other kind of callout, getting as far as trying
2685 RCPT means that the domain itself is ok).
2687 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2690 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2691 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2692 session, the daemon ignores ECONNECT errors and logs others; it now
2693 ignores EPIPE as well.
2695 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2696 (quoted-printable decoding).
2698 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2699 later the small subsequent patch to fix an introduced bug.
2701 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2703 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2705 PH/08 An error is now given if message_size_limit is specified negative.
2707 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2708 to be given (somewhat) arbitrary names.
2710 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2713 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2714 miscellaneous code fixes
2716 PH/10 Added the log_reject_target ACL modifier to specify where to log
2719 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2720 hostname. This is wrong, because it relates to the incoming message (and
2721 probably the interface on which it is arriving) and not to the outgoing
2722 callout (which could be using a different interface). This has been
2723 changed to use the value of the helo_data option from the smtp transport
2724 instead - this is what is used when a message is actually being sent. If
2725 there is no remote transport (possible with a router that sets up host
2726 addresses), $smtp_active_hostname is used.
2728 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2729 tweaks were necessary in order to get it to work (see also 21 below):
2730 (a) The code assumed that strncpy() returns a negative number on buffer
2731 overflow, which isn't the case. Replaced with Exim's string_format()
2733 (b) There were several signed/unsigned issues. I just did the minimum
2734 hacking in of casts. There is scope for a larger refactoring.
2735 (c) The code used strcasecmp() which is not a standard C function.
2736 Replaced with Exim's strcmpic() function.
2737 (d) The code set only $1; it now sets $auth1 as well.
2738 (e) A simple test gave the error "authentication client didn't specify
2739 service in request". It would seem that Dovecot has changed its
2740 interface. Fortunately there's a specification; I followed it and
2741 changed what the client sends and it appears to be working now.
2743 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2746 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2747 address A is aliased to B and C, where B exists and C does not. Without
2748 -v the output is "A verified" because verification stops after a
2749 successful redirection if more than one address is generated. However,
2750 with -v the child addresses are also verified. Exim was outputting "A
2751 failed to verify" and then showing the successful verification for C,
2752 with its parentage. It now outputs "B failed to verify", showing B's
2753 parentage before showing the successful verification of C.
2755 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2756 look up a TXT record in a specific list after matching in a combined
2759 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2760 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2761 they consult the DNS. I had assumed they would set it the way they
2762 wanted; and indeed my experiments on Linux seem to show that in some
2763 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2764 To be on the safe side, however, I have now made the interface to
2765 host_find_byname() similar to host_find_bydns(), with an argument
2766 containing the DNS resolver options. The host_find_byname() function now
2767 sets these options at its start, just as host_find_bydns() does. The smtp
2768 transport options dns_qualify_single and dns_search_parents are passed to
2769 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2770 of host_find_byname() use the default settings of RES_DEFNAMES
2771 (qualify_single) but not RES_DNSRCH (search_parents).
2773 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2774 spool_read_header() do less string testing, by means of a preliminary
2775 switch on the second character of optional "-foo" lines. (This is
2776 overdue, caused by the large number of possibilities that now exist.
2777 Originally there were few.) While I was there, I also converted the
2778 str(n)cmp tests so they don't re-test the leading "-" and the first
2779 character, in the hope this might squeeze out yet more improvement.
2781 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2782 flag allowing group syntax was set by the header_syntax check but not
2783 turned off, possible causing trouble later; (2) The flag was not being
2784 set at all for the header_verify test, causing "group"-style headers to
2785 be rejected. I have now set it in this case, and also caused header_
2786 verify to ignore an empty address taken from a group. While doing this, I
2787 came across some other cases where the code for allowing group syntax
2788 while scanning a header line wasn't quite right (mostly, not resetting
2789 the flag correctly in the right place). These bugs could have caused
2790 trouble for malformed header lines. I hope it is now all correct.
2792 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2793 with the "reply" argument non-NULL. The code, however (which originally
2794 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2795 but it didn't always do it. This confused somebody who was copying the
2796 code for some other use. I have removed all the tests.
2798 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2799 feature that was used to support insecure browsers during the U.S. crypto
2800 embargo. It requires special client support, and Exim is probably the
2801 only MTA that supported it -- and would never use it because real RSA is
2802 always available. This code has been removed, because it had the bad
2803 effect of slowing Exim down by computing (never used) parameters for the
2804 RSA_EXPORT functionality.
2806 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2807 authenticator to fail if there's a tab character in the incoming data
2808 (there should never be unless someone is messing about, as it's supposed
2809 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2810 if the connection is using TLS or if the remote IP is the same as the
2811 local IP, and the "valid-client-cert option" if a client certificate has
2814 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2815 authenticators. This can be used for authorization after authentication
2816 succeeds. (In the case of plaintext, it servers for both authentication
2819 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2820 if any retry times were supplied.
2822 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2823 connection, where there is no client IP address to check. In this
2824 situation, the verify now always succeeds.
2826 PH/25 Applied John Jetmore's -Mset patch.
2828 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2830 PH/27 In a string expansion for a processed (not raw) header when multiple
2831 headers of the same name were present, leading whitespace was being
2832 removed from all of them, but trailing whitespace was being removed only
2833 from the last one. Now trailing whitespace is removed from each header
2834 before concatenation. Completely empty headers in a concatenation (as
2835 before) are ignored.
2837 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2838 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2840 PH/29 [Removed. This was a change that I later backed out, and forgot to
2841 correct the ChangeLog entry (that I had efficiently created) before
2842 committing the later change.]
2844 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2845 address errors (4xx response to RCPT) over the same connection as other
2846 messages routed to the same hosts. Such deliveries are always "forced",
2847 so retry times are not inspected. This resulted in far too many retries
2848 for the affected addresses. The effect occurred only when there were more
2849 hosts than the hosts_max_try setting in the smtp transport when it had
2850 the 4xx errors. Those hosts that it had tried were not added to the list
2851 of hosts for which the message was waiting, so if all were tried, there
2852 was no problem. Two fixes have been applied:
2854 (i) If there are any address or message errors in an SMTP delivery, none
2855 of the hosts (tried or untried) are now added to the list of hosts
2856 for which the message is waiting, so the message should not be a
2857 candidate for sending over the same connection that was used for a
2858 successful delivery of some other message. This seems entirely
2859 reasonable: after all the message is NOT "waiting for some host".
2860 This is so "obvious" that I'm not sure why it wasn't done
2861 previously. Hope I haven't missed anything, but it can't do any
2862 harm, as the worst effect is to miss an optimization.
2864 (ii) If, despite (i), such a delivery is accidentally attempted, the
2865 routing retry time is respected, so at least it doesn't keep
2866 hammering the server.
2868 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2869 in ${readsocket because some servers need this prod.
2871 PH/32 Added some extra debug output when updating a wait-xxx database.
2873 PH/33 The hint "could be header name not terminated by colon", which has been
2874 given for certain expansion errors for a long time, was not being given
2875 for the ${if def:h_colon_omitted{... case.
2877 PH/34 The spec says: "With one important exception, whenever a domain list is
2878 being scanned, $domain contains the subject domain." There was at least
2879 one case where this was not true.
2881 PH/35 The error "getsockname() failed: connection reset by peer" was being
2882 written to the panic log as well as the main log, but it isn't really
2883 panic-worthy as it just means the connection died rather early on. I have
2884 removed the panic log writing for the ECONNRESET error when getsockname()
2887 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2888 runs only) independently of the message's sender address. This meant
2889 that, if the 4xx error was in fact related to the sender, a different
2890 message to the same recipient with a different sender could confuse
2891 things. In particular, this can happen when sending to a greylisting
2892 server, but other circumstances could also provoke similar problems.
2893 I have changed the default so that the retry time for these errors is now
2894 based a combination of the sender and recipient addresses. This change
2895 can be overridden by setting address_retry_include_sender=false in the
2898 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2899 remote server are returned as part of bounce messages. This was not
2900 happening for LMTP over a pipe (the lmtp transport), but now it is the
2901 same for both kinds of LMTP.
2903 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2904 in header lines that were in fact CNAMEs. This is no longer the case.
2906 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2907 and queue runs started by the daemon processed all messages. This has
2908 been fixed so that -R and -S can now usefully be given with -q<time>.
2910 PH/40 Import PCRE release 6.7 (fixes some bugs).
2912 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2914 PH/42 Give an error if -q is specified more than once.
2916 PH/43 Renamed the variables $interface_address and $interface_port as
2917 $received_ip_address and $received_port, to make it clear that these
2918 values apply to message reception, and not to the outgoing interface when
2919 a message is delivered. (The old names remain recognized, of course.)
2921 PH/44 There was no timeout on the connect() call when using a Unix domain
2922 socket in the ${readsocket expansion. There now is.
2924 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2925 be meaningful with "accept".
2927 SC/01 Eximstats V1.43
2928 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2930 SC/02 Eximstats V1.44
2931 Use a glob alias rather than an array ref in the generated
2932 parser. This improves both readability and performance.
2934 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2935 Collect SpamAssassin and rejection statistics.
2936 Don't display local sender or destination tables unless
2937 there is data to show.
2938 Added average volumes into the top table text output.
2940 SC/04 Eximstats V1.46
2941 Collect data on the number of addresses (recipients)
2942 as well as the number of messages.
2944 SC/05 Eximstats V1.47
2945 Added 'Message too big' to the list of mail rejection
2946 reasons (thanks to Marco Gaiarin).
2948 SC/06 Eximstats V1.48
2949 Mainlog lines which have GMT offsets and are too short to
2950 have a flag are now skipped.
2952 SC/07 Eximstats V1.49 (Alain Williams)
2953 Added the -emptyok flag.
2955 SC/08 Eximstats V1.50
2956 Fixes for obtaining the IP address from reject messages.
2958 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2959 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2960 whitespace changes from 4.64-PH/27
2962 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2965 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2966 are found, allow negative numbers in numeric criteria)
2968 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2970 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2971 to match changes made in 4.64-PH/43
2973 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2975 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2976 "domain" is actually an IP address, and force a failure. This locks out
2977 those revolvers/nameservers that support "A-for-A" lookups, in
2978 contravention of the specifications.
2980 PH/48 When a host name was looked up from an IP address, and the subsequent
2981 forward lookup of the name timed out, the host name was left in
2982 $sender_host_name, contrary to the specification.
2984 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2985 restricted to single-key lookups, Exim was not diagnosing an error if
2986 * or *@ was used with a query-style lookup.
2988 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2990 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2991 long ago, but noone interested enough thought of it. Let's just say that
2992 the "1.1" means that there are some new functions that weren't there at
2993 some point in the past.
2995 PH/51 Error processing for expansion failure of helo_data from an smtp
2996 transport during callout processing was broken.
2998 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2999 tested/used via the -bh/-bhc/-bs options.
3001 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3002 bug, fixed in subsequent PCRE releases).
3004 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3005 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3007 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3013 SC/01 Use a glob alias rather than an array ref in eximstats generated
3014 parser. This improves both readability and performance.
3016 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3017 Don't display local sender or destination tables in eximstats unless
3018 there is data to show.
3019 Added average volumes into the eximstats top table text output.
3021 SC/03 Collect data on the number of addresses (recipients) as well
3022 as the number of messages in eximstats.
3024 TF/01 Correct an error in the documentation for the redirect router. Exim
3025 does (usually) call initgroups() when daemonizing.
3027 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3028 with consistent privilege compared to when running as a daemon.
3030 TF/03 Note in the spec that $authenticated_id is not set for local
3031 submissions from trusted users.
3033 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3034 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3036 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3037 by adding some example configuration directives to the default
3038 configuration file. A little bit of work is required to uncomment the
3039 directives and define how usernames and passwords are checked, but
3040 there is now a framework to start from.
3042 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3043 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3044 without this. I don't know how relevant this is to other LDAP libraries.
3046 PH/02 Add the verb name to the "unknown ACL verb" error.
3048 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3050 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3052 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3053 directory not expanded when it should be if an expanded home directory
3054 was set for the address (which is overridden by the transport).
3056 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3059 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3060 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3061 because it is too late at that time, and has no effect.
3063 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3064 security issue with \' (bugzilla #107). I could not use the
3065 PQescapeStringConn() function, because it needs a PGconn value as one of
3068 PH/08 When testing addresses using -bt, indicate those final addresses that
3069 are duplicates that would not cause an additional delivery. At least one
3070 person was confused, thinking that -bt output corresponded to deliveries.
3071 (Suppressing duplicates isn't a good idea as you lose the information
3072 about possibly different redirections that led to the duplicates.)
3074 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3075 systems where poll() doesn't work, in particular OS X.
3077 PH/10 Added more information to debugging output for retry time not reached.
3079 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3080 operations in malware.c.
3082 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3085 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3086 syslog_duplication set false, log lines that would normally be written
3087 both the the main log and to the reject log were not written to syslog at
3090 PH/14 In the default configuration, change the use of "message" in ACL warn
3091 statements to "add_header".
3093 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3094 not followed by a command (e.g. "seen endif").
3096 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3097 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3100 PH/17 Added extra conditions to the default value of delay_warning_condition
3104 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3105 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3106 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3109 The Auto-Submitted: and various List- headers are standardised, whereas I
3110 don't think Precedence: ever was.
3112 PH/18 Refactored debugging code in route_finduser() to show more information,
3113 in particular, the error code if getpwnam() issues one.
3115 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3116 This is apparently needed in addition to the PH/07 change above to avoid
3117 any possible encoding problems.
3119 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3120 but not after initializing Perl.
3122 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3123 output them only if debugging. By default they are written stderr,
3124 apparently, which is not desirable.
3126 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3129 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3132 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3134 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3135 authenticated or an ident call has been made. Suppress the default
3136 values for $authenticated_id and $authenticated_sender (but permit -oMai
3137 and -oMas) when testing with -bh.
3139 PH/24 Re-jigged the order of the tests in the default configuration so that the
3140 tests for valid domains and recipients precede the DNS black list and CSA
3141 tests, on the grounds that those ones are more expensive.
3143 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3144 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3145 This bug exists in every version of Exim that I still have, right back to
3148 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3149 However, an attempt to turn on case-sensitivity in a regex key by
3150 including (?-i) didn't work because the subject string was already
3151 lowercased, and the effects were non-intuitive. It turns out that a
3152 one-line patch can be used to allow (?-i) to work as expected.
3158 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3159 other effects) broke the use of negated acl sub-conditions.
3161 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3164 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3165 "Deny" causes Exim to reject the incoming connection with a 554 error.
3166 Unfortunately, if there is a major crisis, such as a disk failure,
3167 tcp-wrappers gives "deny", whereas what one would like would be some
3168 kind of temporary error. A kludge has been added to help with this.
3169 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3170 554 error is used if errno is still zero or contains ENOENT (which occurs
3171 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3174 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3176 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3177 errors. Otherwise a message that provokes a temporary error (when other
3178 messages do not) can cause a whole host to time out.
3180 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3181 addresses were routed directly to files or pipes from a redirect router.
3182 File deliveries just didn't batch; pipe deliveries might have suffered
3185 PH/06 A failure to get a lock for a hints database would erroneously always say
3186 "Failed to get write lock", even when it was really a read lock.
3188 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3189 of 0600. This has been changed to use the value of the lockfile_mode
3190 option (which defaults to 0600).
3192 PH/08 Applied small patch from the Sieve maintainer.
3194 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3195 folder from quota calculations, a direct delivery into this folder messed
3196 up the contents of the maildirsize file. This was because the regex was
3197 used only to exclude .Trash (or whatever) when the size of the mailbox
3198 was calculated. There was no check that a delivery was happening into an
3199 excluded directory. This bug has been fixed by ignoring all quota
3200 processing for deliveries into excluded directories.
3202 PH/10 Added the maildirfolder_create_regex option to appendfile.
3208 PH/01 The code for finding all the local interface addresses on a FreeBSD
3209 system running IPv6 was broken. This may well have applied to all BSD
3210 systems, as well as to others that have similar system calls. The broken
3211 code found IPv4 interfaces correctly, but gave incorrect values for the
3212 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3213 that it would not match correctly against @[] and not recognize the IPv6
3216 PH/02 The ipliteral router was not recognizing addresses of the form user@
3217 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3219 PH/03 Added disable_ipv6.
3221 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3222 decoded form, because it is most often used to construct To: headers
3223 lines in autoreplies, and the decoded form may well be syntactically
3224 invalid. However, $reply_address has leading white space removed, and all
3225 newlines turned into spaces so that the autoreply transport does not
3228 PH/05 If group was specified without a user on a router, and no group or user
3229 was specified on a transport, the group from the router was ignored.
3231 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3232 for visible compile-time settings that can be used to change these
3233 numbers, for those that want even more. Backwards compatibility with old
3234 spool files has been maintained. However, going back to a previous Exim
3235 release will lost any variables that are in spool files.
3237 PH/07 Two small changes when running in the test harness: increase delay when
3238 passing a TCP/IP connection to a new process, in case the original
3239 process has to generate a bounce, and remove special handling of
3240 127.0.0.2 (sic), which is no longer necessary.
3242 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3243 be the same on different OS.
3245 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3248 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3249 whether --show-vars was specified or not
3251 JJ/02 exipick: Added support for new ACL variable spool format introduced
3254 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3255 syntactically invalid From: or Reply-to: line, and a filter used this to
3256 generate an autoreply, and therefore failed to obtain an address for the
3257 autoreply, Exim could try to deliver to a non-existent relative file
3258 name, causing unrelated and misleading errors. What now happens is that
3259 it logs this as a hard delivery error, but does not attempt to create a
3262 PH/11 The exinext utility has a -C option for testing purposes, but although
3263 the given file was scanned by exinext itself; it wasn't being passed on
3264 when Exim was called.
3266 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3267 an end-of-file indication when reading a command response.
3269 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3270 compiled. In many other places in Exim, IPv6 addresses are always
3271 recognized, so I have changed this. It also means that IPv4 domain
3272 literals of the form [IPV4:n.n.n.n] are now always recognized.
3274 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3275 used if the router is not running as root, for example, when verifying at
3276 ACL time, or when using -bh. The debugging output from this situation was
3277 non-existent - all you got was a failure to exec. I have made two
3280 (a) Failures to set uid/gid, the current directory, or a process leader
3281 in a subprocess such as that created by queryprogram now generate
3282 suitable debugging output when -d is set.
3284 (b) The queryprogram router detects when it is not running as root,
3285 outputs suitable debugging information if -d is set, and then runs
3286 the subprocess without attempting to change uid/gid.
3288 PH/15 Minor change to Makefile for building test_host (undocumented testing
3291 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3292 additional section of a DNS packet that returns MX or SRV records.
3293 Instead, it always explicitly searches for A/AAAA records. This avoids
3294 major problems that occur when a DNS server includes only records of one
3295 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3296 fixed another bug: if SRV records were looked up and the corresponding
3297 address records were *not* found in the additional section, the port
3298 values from the SRV records were lost.
3300 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3301 using the correct key (the original address) when searching the retry
3302 rules in order to find which one to use for generating the retry hint.
3304 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3305 adding the default one. Similarly, if it contains a Reply-To: header, the
3306 errors_reply_to option, if set, is not used.
3308 PH/19 When calculating a retry time, Exim used to measure the "time since
3309 failure" by looking at the "first failed" field in the retry record. Now
3310 it does not use this if it is later than than the arrival time of the
3311 message. Instead it uses the arrival time. This makes for better
3312 behaviour in cases where some deliveries succeed, thus re-setting the
3313 "first failed" field. An example is a quota failure for a huge message
3314 when small messages continue to be delivered. Without this change, the
3315 "time since failure" will always be short, possible causing more frequent
3316 delivery attempts for the huge message than are intended.
3317 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3319 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3320 $1, $2, $3) because the numerical variables can be reset during some
3321 expansion items (e.g. "match"), thereby losing the authentication data.
3323 PH/21 Make -bV show the size of off_t variables so that the test suite can
3324 decide whether to run tests for quotas > 2G.
3326 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3327 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3328 filecount value is greater than 2G or if a quota value is greater than 2G
3329 on a system where the size of off_t is not greater than 4, a panic error
3332 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3333 never match. The debug and -bh output now contains an explicit error
3334 message indicating a malformed IPv4 address or mask.
3336 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3337 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3338 PH/23 above applies.
3340 PH/25 Do not write to syslog when running in the test harness. The only
3341 occasion when this arises is a failure to open the main or panic logs
3342 (for which there is an explicit test).
3344 PH/26 Added the /no_tell option to "control=freeze".
3346 PH/27 If a host name lookup failed very early in a connection, for example, if
3347 the IP address matched host_lookup and the reverse lookup yielded a name
3348 that did not have a forward lookup, an error message of the form "no IP
3349 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3350 could be logged. Now it outputs the IP address instead of "NULL".
3352 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3353 allows the sender and the authenticated sender to be set when
3354 submitting a message from within Exim. Since child_open_exim() is
3355 documented for local_scan(), the new function should be too.
3357 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3358 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3359 results in an empty string is now treated as unset.
3361 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3363 PH/31 Added sender_verify_fail logging option.
3365 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3366 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3367 tidied the source and removed it altogether.
3369 PH/33 When a queue run was abandoned because the load average was too high, a
3370 log line was always written; now it is written only if the queue_run log
3371 selector is set. In addition, the log line for abandonment now contains
3372 information about the queue run such as the pid. This is always present
3373 in "start" and "stop" lines but was omitted from the "abandon" line.
3375 PH/34 Omit spaces between a header name and the colon in the error message that
3376 is given when verify = headers_syntax fails (if there are lots of them,
3377 the message gets confusing).
3379 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3380 names, as there are now some PTR records that contain slashes. This check
3381 is only to protect against broken name servers that fall over on strange
3382 characters, so the fact that it applies to all lookups doesn't matter.
3384 PH/36 Now that the new test suite is complete, we can remove some of the
3385 special code in Exim that was needed for the old test suite. For example,
3386 sorting DNS records because real resolvers return them in an arbitrary
3387 order. The new test suite's fake resolver always returns records in the
3390 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3391 bounces) except when queue_only is set, to avoid logging races between
3392 the different processes.
3394 PH/38 Panic-die if .include specifies a non-absolute path.
3396 PH/39 A tweak to the "H" retry rule from its user.
3398 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3399 a label. They prevented compilation on older perls.
3401 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3402 a warning to be raised on newish perls.
3404 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3405 on queue. Changes to match documented behaviour of showing count of
3406 messages matching specified criteria.
3408 PH/40 Changed the default ident timeout from 30s to 5s.
3410 PH/41 Added support for the use of login_cap features, on those BSD systems
3411 that have them, for controlling the resources used by pipe deliveries.
3413 PH/42 The content-scanning code uses fopen() to create files in which to put
3414 message data. Previously it was not paying any attention to the mode of
3415 the files. Exim runs with umask(0) because the rest of the code creates
3416 files with open(), and sets the required mode explicitly. Thus, these
3417 files were ending up world-writeable. This was not a big issue, because,
3418 being within the spool directory, they were not world-accessible. I have
3419 created a function called modefopen, which takes an additional mode
3420 argument. It sets umask(777), creates the file, chmods it to the required
3421 mode, then resets the umask. All the relevant calls to fopen() in the
3422 content scanning code have been changed to use this function.
3424 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3425 to 24 hours. This avoids potential overflow problems when processing G
3426 and H retry rules. I suspect nobody ever tinkers with this value.
3428 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3430 PH/45 When the plaintext authenticator is running as a client, the server's
3431 challenges are checked to ensure they are valid base64 strings. By
3432 default, the authentication attempt is cancelled if an invalid string is
3433 received. Setting client_ignore_invalid_base64 true ignores these errors.
3434 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3435 they are received. Thus, the responses can be made to depend on the
3436 challenges. If an invalid string is ignored, an empty string is placed in
3439 PH/46 Messages that are created by the autoreply transport now contains a
3440 References: header, in accordance with RFCs 2822 and 3834.
3442 PH/47 Added authenticated_sender_force to the smtp transport.
3444 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3446 PH/49 Installed latest patch from the Sieve maintainer.
3448 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3449 was also set, the appendfile transport was unnecessarily scanning a
3450 directory of message files (e.g. for maildir delivery) to find the count
3451 of files (along with the size), even though it did not need this
3452 information. It now does the scan only if it needs to find either the
3453 size of the count of files.
3455 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3457 PH/52 Two bugs concerned with error handling when the smtp transport is
3460 (i) Exim was not creating retry information for temporary errors given
3461 for individual recipients after the DATA command when the smtp transport
3462 was used in LMTP mode. This meant that they could be retried too
3463 frequently, and not timed out correctly.
3465 (ii) Exim was setting the flag that allows error details to be returned
3466 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3467 recipients that were returned after the DATA command.
3469 PH/53 This is related to PH/52, but is more general: for any failing address,
3470 when detailed error information was permitted to be returned to the
3471 sender, but the error was temporary, then after the final timeout, only
3472 "retry timeout exceeded" was returned. Now it returns the full error as
3473 well as "retry timeout exceeded".
3475 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3476 do this, and (what is worse) MTAs that accept it.
3478 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3479 will now be deprecated.
3481 PH/56 New os.c-cygwin from the Cygwin maintainer.
3483 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3484 formats (previously only available in exim formats via -bpr, -bpru,
3485 and -bpra. Now also available in native and exiqgrep formats)
3487 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3488 with very large, slow to parse queues
3490 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3492 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3494 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3495 responses to authentication challenges, though it was showing the
3496 challenges; (ii) I've removed the CR characters from the debug output for
3499 PH/58 Allow for the insertion of a newline as well as a space when a string
3500 is turned into more than one encoded-word during RFC 2047 encoding. The
3501 Sieve code now uses this.
3503 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3504 data_4xx, lost_connection, tls_required.
3506 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3507 message was being sent as an SMTP response.
3509 PH/61 Add -l and -k options to exicyclog.
3511 PH/62 When verifying, if an address was redirected to one new address, so that
3512 verification continued, and the new address failed or deferred after
3513 having set something in $address_data, the value of $address_data was not
3514 passed back to the ACL. This was different to the case when no
3515 redirection occurred. The value is now passed back in both cases.
3517 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3518 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3519 use login_cap.h, so on its own it isn't the distinguishing feature. The
3520 new name refers directly to the setclassresources() function.
3522 PH/65 Added configuration files for NetBSD3.
3524 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3526 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3527 is preferred over IPv4.
3529 PH/68 The bounce_return_message and bounce_return_body options were not being
3530 honoured for bounces generated during the reception of non-SMTP messages.
3531 In particular, this applied to messages rejected by the ACL. This bug has
3532 been fixed. However, if bounce_return_message is true and bounce_return_
3533 body is false, the headers that are returned for a non-SMTP message
3534 include only those that have been read before the error was detected.
3535 (In the case of an ACL rejection, they have all been read.)
3537 PH/69 The HTML version of the specification is now built in a directory called
3538 spec_html instead of spec.html, because the latter looks like a path with
3539 a MIME-type, and this confuses some software.
3541 PH/70 Catch two compiler warnings in sieve.c.
3543 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3544 function verify_get_ident() calls ip_connect() to connect a socket, but
3545 if the "connect()" function timed out, ip_connect() used to close the
3546 socket. However, verify_get_ident() also closes the socket later, and in
3547 between Exim writes to the log, which may get opened at this point. When
3548 the socket was closed in ip_connect(), the log could get the same file
3549 descriptor number as the socket. This naturally causes chaos. The fix is
3550 not to close the socket in ip_connect(); the socket should be closed by
3551 the function that creates it. There was only one place in the code where
3552 this was missing, in the iplookup router, which I don't think anybody now
3553 uses, but I've fixed it anyway.
3555 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3556 well as to direct DNS lookups. Otherwise the handling of names in host
3557 lists is inconsistent and therefore confusing.
3563 PH/01 Two changes to the default runtime configuration:
3565 (1) Move the checks for relay_from_hosts and authenticated clients from
3566 after to before the (commented out) DNS black list checks.
3568 (2) Add control=submission to the relay_from_hosts and authenticated
3569 clients checks, on the grounds that messages accepted by these
3570 statements are most likely to be submissions.
3572 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3574 (1) Generate an error if the third argument for the ${prvs expansion is
3577 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3580 (3) Reset the variables that are obtained from the first argument of
3581 ${prvscheck and used in the second argument before leaving the code,
3582 because their memory is reclaimed, so using them afterwards may do
3585 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3586 one (it's much easier than Tom thought :-).
3588 (5) Because of (4), we can now allow for the use of $prvscheck_result
3589 inside the third argument.
3591 PH/03 For some reason, the default setting of PATH when running a command from
3592 a pipe transport was just "/usr/bin". I have changed it to
3595 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3596 anything to be listed in the output from -bV.
3598 PH/05 When a filter generated an autoreply, the entire To: header line was
3599 quoted in the delivery log line, like this:
3601 => >A.N.Other <ano@some.domain> <original@ddress> ...
3603 This has been changed so that it extracts the operative address. There
3604 may be more than one such address. If so, they are comma-separated, like
3607 => >ano@some.domain,ona@other.domain <original@ddress> ...
3609 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3610 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3611 not being looked up in the rDNS to get a host name, Exim was showing the
3612 IP address twice in Received: lines, even though the IP addresses were
3613 identical. For example:
3615 Received: from [1.2.3.4] (helo=[1.2.3.4])
3617 However, if the real host name was known, it was omitting the HELO data
3618 if it matched the actual IP address. This has been tidied up so that it
3619 doesn't show the same IP address twice.
3621 PH/07 When both +timestamp and +memory debugging was on, the value given by
3622 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3623 called by the debug printing, thereby overwriting the timestamp buffer.
3624 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3626 PH/08 When the original message was included in an autoreply transport, it
3627 always said "this is a copy of the message, including all the headers",
3628 even if body_only or headers_only was set. It now gives an appropriate
3631 PH/09 Applied a patch from the Sieve maintainer which:
3633 o fixes some comments
3634 o adds the (disabled) notify extension core
3635 o adds some debug output for the result of if/elsif tests
3636 o points to the current vacation draft in the documentation
3637 and documents the missing references header update
3641 o fixes a bug in processing the envelope test (when testing
3642 multiple envelope elements, the last element determined the
3645 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3646 Electronic Mail") by including:
3648 Auto-submitted: auto-generated
3650 in the messages that it generates (bounce messages and others, such as
3651 warnings). In the case of bounce messages for non-SMTP messages, there was
3652 also a typo: it was using "Auto_submitted" (underscore instead of
3653 hyphen). Since every message generated by Exim is necessarily in response
3654 to another message, thes have all been changed to:
3656 Auto-Submitted: auto-replied
3658 in accordance with these statements in the RFC:
3660 The auto-replied keyword:
3662 - SHOULD be used on messages sent in direct response to another
3663 message by an automatic process,
3665 - MUST NOT be used on manually-generated messages,
3667 - MAY be used on Delivery Status Notifications (DSNs) and Message
3668 Disposition Notifications (MDNs),
3670 - MUST NOT be used on messages generated by automatic or periodic
3671 processes, except for messages which are automatic responses to
3674 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3675 to the default Received: header definition.
3677 PH/12 Added log selector acl_warn_skipped (default on).
3679 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3680 variables because (a) they are in the wrong storage pool and (b) even if
3681 they were copied, it wouldn't work properly because of the caching.
3683 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3684 checking when decoding. Apparently there are clients that generate
3685 overlong encoded strings. Why am I not surprised?
3687 PH/15 If the first argument of "${if match_address" was not empty, but did not
3688 contain an "@" character, Exim crashed. Now it writes a panic log message
3689 and treats the condition as false.
3691 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3693 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3694 extension "envelope-auth". The code is finished and in agreement with
3695 other implementations, but there is no documentation so far and in fact,
3696 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3697 not changing the active code.
3699 Print executed "if" and "elsif" statements when debugging is used. This
3700 helps a great deal to understand what a filter does.
3702 Document more things not specified clearly in RFC3028. I had all this
3703 sorted out, when out of a sudden new issues came to my mind. Oops."
3705 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3708 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3709 canonical form (as documented). However, after a host name lookup from
3710 the IP address, check_host() was doing a simple string comparison with
3711 addresses acquired from the DNS when checking that the found name did
3712 have the original IP as one of its addresses. Since any found IPv6
3713 addresses are likely to be in abbreviated form, the comparison could
3714 fail. Luckily, there already exists a function for doing the comparison
3715 by converting both addresses to binary, so now that is used instead of
3716 the text comparison.
3718 PH/20 There was another similar case to PH/19, when a complete host name was
3719 given in a host list; looking up its IP address could give an abbreviated
3720 form, whereas the current host's name might or might not be abbreviated.
3721 The same fix has been applied.
3727 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3728 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3731 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3732 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3734 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3736 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3737 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3738 Also, for "Auto-Submitted", treat anything other than "no" as
3739 non-personal, in accordance with RFC 3834. (Previously it treated
3740 anything starting "auto-" as non-personal.)
3742 TF/01 The control=submission/name=... option had a problem with syntax
3743 errors if the name included a slash character. The /name= option
3744 now slurps the rest of the string, so it can include any characters
3745 but it must come last in the list of options (after /sender_retain
3748 PH/05 Some modifications to the interface to the fake nameserver for the new
3756 TK/01 Added the "success_on_redirect" address verification option. See
3757 NewStuff for rationale and an example.
3759 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3761 PH/02 Patch to exigrep to allow it to work on syslog lines.
3763 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3764 fread() to skip over the body file's header line, because in Cygwin the
3765 header line is locked and is inaccessible.
3767 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3768 co-exist for some time) to make it clear that it is the Exim ID that is
3769 referenced, not the Message-ID: header line.
3771 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3772 string_format() function, because snprintf() does not exist on all
3775 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3776 ${stat: expansion item.
3778 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3779 protocol synchronization error", to keep the pedants happy.
3781 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3782 well as for IRIX systems, when gcc is being used. See the host.c source
3785 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3787 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3790 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3791 transport and to the smtp transport in LMTP mode.
3793 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3795 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3796 run a filter in a subprocess. This could lead to confusion in subsequent
3797 lookups in the parent process. There should also be a search_tidyup() at
3798 the end of the subprocess.
3800 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3801 only if the host matched helo_try_verify_hosts, which caused the
3802 verification to occur when the EHLO/HELO command was issued. The ACL just
3803 tested the remembered result. Now, if a previous verification attempt has
3804 not happened, "verify = helo" does it there and then.
3806 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3808 TK/03 Fix log output including CR from clamd.
3810 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3811 exist provoked a memory error which could cause a segfault.
3813 PH/15 Installed PCRE 6.2
3815 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3817 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3818 of the problem. Specifically, suggested +O2 rather than +O1 for the
3821 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3823 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3824 record, the port was not correctly logged when the outgoing_port log
3825 selector was set (it logged the transort's default port).
3827 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3828 fallback_hosts, and "hosts" in the smtp transport.
3830 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3831 host errors such as "Connection refused".
3833 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3834 authentication with radiusclient 0.4.9:
3836 - Error returned from rc_read_config was caught wrongly
3837 - Username/password not passed on to radius server due to wrong length.
3839 The presumption is that some radiusclient API changes for 4.51/PH/17
3840 were not taken care of correctly. The code is still untested by me (my
3841 Linux distribution still has 0.3.2 of radiusclient), but it was
3842 contributed by a Radius user.
3844 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3845 expanding the "port" option of the smtp transport.
3847 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3848 while reading a MIME header. Thanks to Tom Hughes for a patch.
3850 PH/24 Include config.h inside local_scan.h so that configuration settings are
3853 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3854 that in an ACL for RCPT (for example), you can examine exactly what was
3857 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3858 commands, but it was not correctly comparing the address with the actual
3859 client host address. Thus, it would show the EHLO address in Received:
3860 header lines when this was not necessary.
3862 PH/27 Added the % operator to ${eval:}.
3864 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3865 it should be ignoring failures (because with -C, for example, it has lost
3866 privilege). It wasn't ignoring creation failures other than "already
3869 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3872 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3873 because an input line was too long, either on its own, or by virtue of
3874 too many continuations, the temporary file was not being removed, and the
3875 return code was incorrect.
3877 PH/31 Missing "BOOL" in function definition in filtertest.c.
3879 PH/32 Applied Sieve patches from the maintainer.
3881 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3883 PH/33 Added "verify = not_blind".
3885 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3886 Local/Makefile (with some defaults set). These are used in built scripts
3887 such as exicyclog, but they have never been used in the exim_install
3888 script (though there are many overriding facilities there). I have
3889 arranged that the exim_install script now takes note of these two
3892 PH/35 Installed configuration files for Dragonfly.
3894 PH/36 When a locally submitted message by a trusted user did not contain a
3895 From: header, and the sender address was obtained from -f or from an SMTP
3896 MAIL command, and the trusted user did not use -F to supply a sender
3897 name, $originator_name was incorrectly used when constructing a From:
3898 header. Furthermore, $originator_name was used for submission mode
3899 messages from external hosts without From: headers in a similar way,
3900 which is clearly wrong.
3902 PH/37 Added control=suppress_local_fixups.
3904 PH/38 When log_selector = +received_sender was set, and the addition of the
3905 sender made the log line's construction buffer exactly full, or one byte
3906 less than full, an overflow happened when the terminating "\n" was
3909 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3910 when the result of a list match is failure because a DNS lookup failed.
3912 PH/40 RM_COMMAND is now used in the building process.
3914 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3915 the "build-* directories that it finds.
3917 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3918 address in a domain literal was a prefix of an interface address.
3920 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3921 when verifying a sender address, unless rewrite_headers is false.
3923 PH/44 Wrote a long comment about why errors_to addresses are verified as
3924 recipients, not senders.
3926 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3927 the ratelimit ACL was added.
3929 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3931 PH/46 Added extra information about PostgreSQL errors to the error string.
3933 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3934 avoiding the need to install special zones in a real server. This is
3935 backwards compatible; if it can't find the fake resolver, it drops back.
3936 Thus, both old and new test suites can be run.
3938 TF/02 Added util/ratelimit.pl
3940 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3941 clock is set back in time.
3943 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3944 Candler <B.Candler@pobox.com>.
3946 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3947 OK for addresses that are the result of redirections.
3949 PH/48 A number of further additions for the benefit of the new test suite,
3950 including a fake gethostbyname() that interfaces to the fake DNS resolver
3953 TF/06 The fix for widen_domains has also been applied to qualify_single and
3954 search_parents which are the other dnslookup options that can cause
3957 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3960 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3962 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3963 service" if it encountered an MX record with an empty target hostname.
3964 The message is now "an MX or SRV record indicated no SMTP service".
3966 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3967 if the DNS of the sending site is misconfigured. This is quite a
3968 common situation. This change restores the behaviour of treating a
3969 helo verification defer as a failure.
3971 PH/51 If self=fail was set on a router, the bounce message did not include the
3972 actual error message.
3978 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3980 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3981 command itself ended in error, the underlying message about the transport
3982 filter timeout was being overwritten with the pipe command error. Now the
3983 underlying error message should be appended to the second error message.
3985 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3987 PH/02 Reduce the amount of output that "make" produces by default. Full output
3988 can still be requested.
3990 PH/03 The warning log line about a condition test deferring for a "warn" verb
3991 was being output only once per connection, rather than after each
3992 occurrence (because it was using the same function as for successful
3993 "warn" verbs). This seems wrong, so I have changed it.
3995 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3996 it should not have, which might have caused a crash in the right
3997 circumstances, but probably never did.
3999 PH/04 Installed a modified version of Tony Finch's patch to make submission
4000 mode fix the return path as well as the Sender: header line, and to
4001 add a /name= option so that you can make the user's friendly name appear
4004 TF/03 Added the control = fakedefer ACL modifier.
4006 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4007 Mark Lowes for thorough testing.
4009 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4011 TK/03 Merged latest SRS patch from Miles Wilton.
4013 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4014 with the definition in sysexits.h (which is #included earlier).
4015 Fortunately, Exim does not actually use EX_OK. The code used to try to
4016 preserve the sysexits.h value, by assuming that macro definitions were
4017 scanned for macro replacements. I have been disabused of this notion,
4018 so now the code just undefines EX_OK before #including unistd.h.
4020 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4021 in the smtp transport. When a block could not be written in a single
4022 write() function, the timeout was being re-applied to each part-write.
4023 This seems wrong - if the receiver was accepting one byte at a time it
4024 would take for ever. The timeout is now adjusted when this happens. It
4025 doesn't have to be particularly precise.
4027 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4028 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4030 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4031 without a domain if the check to <postmaster@domain> fails.
4033 SC/01 Eximstats: added -xls and the ability to specify output files
4034 (patch written by Frank Heydlauf).
4036 SC/02 Eximstats: use FileHandles for outputting results.
4038 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4040 SC/04 Eximstats: fixed display of large numbers with -nvr option
4042 SC/05 Eximstats: fixed merging of reports with empty tables.
4044 SC/06 Eximstats: added the -include_original_destination flag
4046 SC/07 Eximstats: removed tabs and trailing whitespace.
4048 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4050 TK/06 MBOX spool code: Add real "From " MBOX separator line
4051 so the .eml file is really in mbox format (even though
4052 most programs do not really care). Patch from Alex Miller.
4054 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4055 The latter is generated from $received_to and is only set if the
4056 message has one envelope recipient. SA can use these headers,
4057 obviously out-of-the-box. Patch from Alex Miller.
4059 PH/08 The ${def test on a variable was returning false if the variable's
4060 value was "0", contrary to what the specification has always said!
4061 The result should be true unless the variable is empty.
4063 PH/09 The syntax error of a character other than { following "${if
4064 def:variable_name" (after optional whitespace) was not being diagnosed.
4065 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4066 accidental colon was present, for example, could give incorrect results.
4068 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4069 result is used (not including appendfile, where other changes are about
4072 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4073 This involved changing a lot of size variables from int to off_t. It
4074 should work with maildirs and everything.
4076 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4077 spamd dying while we are connected to it.
4079 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4082 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4083 function for BDB 4.3.
4085 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4087 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4088 the sources for PCRE have been re-arranged and more files are now
4091 PH/15 The code I had for printing potentially long long variables in PH/11
4092 above was not the best (it lost precision). The length of off_t variables
4093 is now inspected at build time, and an appropriate printing format (%ld
4094 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4095 to be "long long int" or "long int". This is needed for the internal
4096 formatting function string_vformat().
4098 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4099 the configuration file to be ":syslog", then the script "guesses" where
4100 the logs files are, rather than using the compiled in default. In our
4101 case the guess is not the same as the compiled default, so the script
4102 suddenly stopped working when I started to use syslog. The patch checks
4103 to see if log_file_path is "". If so, it attempts to read it from exim
4104 with no configuration file to get the compiled in version, before it
4105 falls back to the previous guessing code."
4107 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4108 implementing BATV in an Exim configuration. See NewStuff for the gory
4111 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4112 Makefile that are specific to HP-UX.
4114 PH/18 If the "use_postmaster" option was set for a recipient callout together
4115 with the "random" option, the postmaster address was used as the MAIL
4116 FROM address for the random test, but not for the subsequent recipient
4117 test. It is now used for both.
4119 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4120 patch removes a few documentation additions to RFC 3028, because the
4121 latest draft now contains them. It adds the new en;ascii-case comparator
4122 and a new error check for 8bit text in MIME parts. Comparator and
4123 require names are now matched exactly. I enabled the subaddress
4124 extension, but it is not well tested yet (read: it works for me)."
4126 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4127 rework some of the code of TK/09 above to avoid the hardwired use of
4128 "%lld" and "long long". Replaced the call to snprintf() with a call to
4131 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4132 records point to non-existent hosts", "retry timeout exceeded", and
4133 "retry time not reached for any host after a long failure period".
4135 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4136 experimental DomainKeys support:
4138 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4139 (2) On an error such as an illegally used "control", the wrong name for
4140 the control was given.
4142 These problems did NOT occur unless DomainKeys support was compiled.
4144 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4146 PH/24 Added ${if match_ip condition.
4148 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4149 databases so that it will be absolutely obvious if a crash occurs in the
4150 DB library. This is a regular occurrence (often caused by mis-matched
4153 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4154 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4155 picked up on a user's system that detects such things. There doesn't seem
4156 to be a gcc warning option for this - only an attribute that has to be
4157 put on the function's prototype. It seems that in Fedora Core 4 they have
4158 set this on a number of new functions. No doubt there will be more in due
4161 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4162 specify a transport. However, if an address that was verified by such a
4163 router was the subject of a callout, Exim crashed because it tried to
4164 read the rcpt_include_affixes from the non-existent transport. Now it
4165 just assumes that the setting of that option is false. This bug was
4166 introduced by 4.51/PH/31.
4168 PH/28 Changed -d+all to exclude +memory, because that information is very
4169 rarely of interest, but it makes the output a lot bigger. People tend to
4170 do -d+all out of habit.
4172 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4173 code in os-type was giving problems when libc.so lives in lib64, like on
4176 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4177 aren't the modern standard, and it seems that some systems' include files
4178 don't always have them. Exim was already checking for some of the newer
4179 ones like T_AAAA, and defining it itself. I've added checks for all the
4180 record types that Exim uses.
4182 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4183 not automatically generating a new one, as it is supposed to. This
4184 prevented TLS from working. If the file did exist, but contained invalid
4185 data, a new version was generated, as expected. It was only the case of a
4186 non-existent file that was broken.
4188 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4189 with a change in libdomainkeys > 0.64.
4191 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4192 from DNS. If the selector record carries the flag, it now has
4193 precedence over the domain-wide flag.
4195 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4197 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4198 the use of a port name that isn't defined in /etc/services) occurred, the
4199 message was deferred as in a normal delivery, and thus remained on the
4200 spool, instead of being failed because of the mua_wrapper setting. This
4201 is now fixed, and I tidied up some of the mua_wrapper messages at the
4204 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4205 the messages in a hash of arrays rather than using individual hashes.
4206 This is a bit cleaner and results in dramatic memory savings, albeit
4207 at a slight CPU cost.
4209 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4210 as requested by Marc Sherman.
4212 SC/10 Eximstats: added histograms for user specified patterns as requested
4215 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4217 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4218 fopen() in the content-scanning modules that did not already have it.
4224 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4225 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4227 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4229 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4231 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4232 to test Sieve filters that use "vacation".
4234 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4235 that changes the way the GnuTLS parameters are stored in the cache file.
4236 The new format can be generated externally. For backward compatibility,
4237 if the data in the cache doesn't make sense, Exim assumes it has read an
4238 old-format file, and it generates new data and writes a new file. This
4239 means that you can't go back to an older release without removing the
4242 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4243 work if there are any delivery delays because "one_time" forces the
4244 parent to be marked "delivered", so its unseen clone is never tried
4245 again. For this reason, Exim now forbids the simultaneous setting of
4248 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4249 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4250 entry if you want to know the details. The fix, however, neglected to
4251 consider the case when local delivery batching is involved. The test for
4252 "previously delivered" was not happening when checking to see if an
4253 address could be batched with a previous (undelivered) one; under
4254 certain circumstances this could lead to multiple deliveries to the same
4257 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4258 in its include files, and this causes problems building Exim.
4260 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4261 header_syntax) but Exim was just ignoring anything given after a slash.
4262 In particular, this caused confusion with an attempt to use "verify =
4263 reverse_host_lookup/defer_ok". An error is now given when options are
4264 supplied for verify items that do not have them. (Maybe reverse_host_
4265 lookup should have a defer_ok option, but that's a different point.)
4267 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4268 defined by RFC 821) to 2048, because there were problems with some AUTH
4269 commands, and RFC 1869 says the size should be increased for extended
4270 SMTP commands that take arguments.
4272 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4275 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4276 "unknown" error; now it says that the functionality isn't in the binary.
4278 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4279 an address' error message when a string expansion fails (syntax or
4280 whatever). Otherwise the password may appear in the log. Following change
4281 PH/42 below, there is no longer a chance of it appearing in a bounce
4284 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4286 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4287 of its addresses was ever tried. (Bugzilla bug #2.)
4289 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4290 the result incorrectly in the debug output. (It correctly added a newline
4291 to what was transported.)
4293 TF/01 Added $received_time.
4295 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4296 commented out examples of how to interface to a virus scanner and to
4297 SpamAssassin. Also added commented examples of av_scanner and
4298 spamd_address settings.
4300 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4301 and controls are allowed in which ACLs. There were a couple of minor
4302 errors. Some of the entries in the conditions table (which is a table of
4303 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4304 negation of where the condition IS allowed.
4306 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4308 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4309 header file does not have a version number, so I've had to invent a new
4310 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4311 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4312 radiusclient), but it was contributed by a Radius user.
4314 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4315 files or directories, for OpenSSL.
4317 PH/19 When an Exim process that is running as root has to create an Exim log
4318 file, it does so in a subprocess that runs as exim:exim so as to get the
4319 ownership right at creation (otherwise, other Exim processes might see
4320 the file with the wrong ownership). There was no test for failure of this
4321 fork() call, which would lead to the process getting stuck as it waited
4322 for a non-existent subprocess. Forks do occasionally fail when resources
4323 run out. I reviewed all the other calls to fork(); they all seem to check
4326 PH/20 When checking for unexpected SMTP input at connect time (before writing
4327 the banner), Exim was not dealing correctly with a non-positive return
4328 from the read() function. If the client had disconnected by this time,
4329 the result was a log entry for a synchronization error with an empty
4330 string after "input=" when read() returned zero. If read() returned -1
4331 (an event I could not check), uninitialized data bytes were printed.
4332 There were reports of junk text (parts of files, etc) appearing after
4335 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4337 PH/22 Added support for macro redefinition, and (re)definition in between
4338 driver and ACL definitions.
4340 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4341 forgetting to use the resulting value; it was using the unexpanded value.
4343 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4344 hadn't been configured. The fix is from Juergen Kreileder, who
4345 understands it better than I do:
4347 "Here's what I see happening with three configured cyrus_sasl
4348 authenticators configured (plain, login, cram-md5):
4350 On startup auth_cyrus_sasl_init() gets called for each of these.
4351 This means three calls to sasl_listmech() without a specified mech_list.
4352 => SASL tests which mechs of all available mechs actually work
4353 => three warnings about OTP not working
4354 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4356 With the patch, sasl_listmech() also gets called three times. But now
4357 SASL's mech_list option is set to the server_mech specified in the the
4358 authenticator. Or in other words, the answer from sasl_listmech()
4359 gets limited to just the mech you're testing for (which is different
4361 => the return list contains just 'plain' or 'login', 'cram-md5' or
4362 nothing depending on the value of ob->server_mech.
4364 I've just tested the patch: Authentication still works fine,
4365 unavailable mechs specified in the exim configuration are still
4366 caught, and the auth.log warnings about OTP are gone."
4368 PH/25 When debugging is enabled, the contents of the command line are added
4369 to the debugging output, even when log_selector=+arguments is not
4372 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4373 answer is "GNU", and only if the return is "GNU/something" is the answer
4376 PH/27 $acl_verify_message is now set immediately after the failure of a
4377 verification in an ACL, and so is available in subsequent modifiers. In
4378 particular, the message can be preserved by coding like this:
4380 warn !verify = sender
4381 set acl_m0 = $acl_verify_message
4383 Previously, $acl_verify_message was set only while expanding "message"
4384 and "log_message" when a very denied access.
4386 PH/28 Modified OS/os.c-Linux with
4388 -#ifndef OS_LOAD_AVERAGE
4389 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4391 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4392 nomenclature these days.)
4394 PH/29 Installed patch from the Sieve maintainer that adds the options
4395 sieve_useraddress and sieve_subaddress to the redirect router.
4397 PH/30 In these circumstances:
4398 . Two addresses routed to the same list of hosts;
4399 . First host does not offer TLS;
4400 . First host accepts first address;
4401 . First host gives temporary error to second address;
4402 . Second host offers TLS and a TLS session is established;
4403 . Second host accepts second address.
4404 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4405 and peerdn, if requested) that were in fact used only for the second
4408 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4409 attention to any local part prefix or suffix that was matched by the
4410 router that accepted the address. It now behaves in the same way as it
4411 does for delivery: the affixes are removed from the local part unless
4412 rcpt_include_affixes is set on the transport.
4414 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4415 timeout during the DATA phase of an incoming message.
4417 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4418 applied a patch sanctioned by the Sieve maintainer.
4420 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4421 the uid or gid is negative. A case of a negative gid caused this to be
4422 noticed. The fix allows for either to be negative.
4424 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4425 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4428 PH/36 The change PH/12 above was broken. Fixed it.
4430 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4431 the grounds that routing the same address twice would always produce the
4432 same answer. This might have been true once, but it is certainly no
4433 longer true now. Routing a child address may depend on the previous
4434 routing that produced that child. Some complicated redirection strategies
4435 went wrong when messages had multiple recipients, and made Exim's
4436 behaviour dependent on the order in which the addresses were given.
4438 I have moved the duplicate checking until after the routing is complete.
4439 Exim scans the addresses that are assigned to local and remote
4440 transports, and removes any duplicates. This means that more work will be
4441 done, as duplicates will always all be routed, but duplicates are
4442 presumably rare, so I don't expect this is of any significance.
4444 For deliveries to pipes, files, and autoreplies, the duplicate checking
4445 still happens during the routing process, since they are not going to be
4448 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4449 It corrects a timeout issue with spamd. This is Ian's comment: "The
4450 background is that sometimes spamd either never reads data from a
4451 connection it has accepted, or it never writes response data. The exiscan
4452 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4453 blindly assumes that writes won't block so it may never time out."
4455 PH/39 Allow G after quota size as well as K and M.
4457 PH/40 The value set for $authenticated_id in an authenticator may not contain
4458 binary zeroes or newlines because the value is written to log lines and
4459 to spool files. There was no check on this. Now the value is run through
4460 the string_printing() function so that such characters are converted to
4461 printable escape sequences.
4463 PH/41 $message_linecount is a new variable that contains the total number of
4464 lines in the message. Compare $body_linecount, which is the count for the
4467 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4468 bounce and delay warning messages, except in certain special cases, which
4471 (a) An SMTP error message from a remote host;
4472 (b) A message specified in a :fail: redirection;
4473 (c) A message specified in a "fail" command in a system filter;
4474 (d) A message specified in a FAIL return from the queryprogram router;
4475 (e) A message specified by the cannot_route_message router option.
4477 In these cases only, Exim does include the error details in bounce and
4478 warning messages. There are also a few cases where bland messages such
4479 as "unrouteable address" or "local delivery error" are given.
4481 PH/43 $value is now also set for the "else" part of a ${run expansion.
4483 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4484 being worked on, but at least Exim now implements the latest version to
4487 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4488 process to complete was treated as a delivery failure, a timeout while
4489 writing the message to the pipe was logged, but erroneously treated as a
4490 successful delivery. Such timeouts include transport filter timeouts. For
4491 consistency with the overall process timeout, these timeouts are now
4492 treated as errors, giving rise to delivery failures by default. However,
4493 there is now a new Boolean option for the pipe transport called
4494 timeout_defer, which, if set TRUE, converts the failures into defers for
4495 both kinds of timeout. A transport filter timeout is now identified in
4498 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4499 systems where "make" and "gmake" are different, calling "gmake" at top
4500 level broke things. I've arranged for the value of $(MAKE) to be passed
4501 from the Makefile to this script so that it can call the same version of
4505 A note about Exim versions 4.44 and 4.50
4506 ----------------------------------------
4508 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4509 changes of various kinds. As a consequence, a big documentation update was
4510 needed. This delayed the release for rather longer than seemed good, especially
4511 in the light of a couple of (minor) security issues. Therefore, the changes
4512 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4513 release. So 4.44 and 4.50 are in effect two different branches that both start
4516 I have left the 4.50 change log unchanged; it contains all the changes since
4517 4.43. The change log for 4.44 is below; many of its items are identical to
4518 those for 4.50. This seems to be the most sensible way to preserve the
4519 historical information.
4525 1. Minor wording change to the doc/README.SIEVE file.
4527 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4528 computation of the current number of files was incorrect.
4530 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4531 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4534 4. Give more explanation in the error message when the command for a transport
4535 filter fails to execute.
4537 5. There are several places where Exim runs a non-Exim command in a
4538 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4539 was being done only for the command run by the queryprogram router. It is
4540 now done for all such subprocesses. The other cases are: ${run, transport
4541 filters, and the commands run by the lmtp and pipe transports.
4543 6. Added CONFIGURE_GROUP build-time option.
4545 7. Some older OS have a limit of 256 on the maximum number of file
4546 descriptors. Exim was using setrlimit() to set 1000 as a large value
4547 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4548 systems. I've change it so that if it can't get 1000, it tries for 256.
4550 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4551 was an oversight, and furthermore, ever since the addition of extra
4552 controls (e.g. 4.43/32), the checks on when to allow different forms of
4553 "control" were broken. There should now be diagnostics for all cases when a
4554 control that does not make sense is encountered.
4556 9. Added the /retain_sender option to "control=submission".
4558 10. $recipients is now available in the predata ACL (oversight).
4560 11. Tidy the search cache before the fork to do a delivery from a message
4561 received from the command line. Otherwise the child will trigger a lookup
4562 failure and thereby defer the delivery if it tries to use (for example) a
4563 cached ldap connection that the parent has called unbind on.
4565 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4566 of $address_data from the recipient verification was clobbered by the
4567 sender verification.
4569 13. The value of address_data from a sender verification is now available in
4570 $sender_address_data in subsequent conditions in the ACL statement.
4572 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4574 15. Added a new option "connect=<time>" to callout options, to set a different
4577 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4578 was its contents. (It was OK if the option was not defined at all.)
4580 17. A "Completed" log line is now written for messages that are removed from
4581 the spool by the -Mrm option.
4583 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4584 information about exactly what failed.
4586 19. Added -dd to debug only the daemon process.
4588 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4589 handles timeouts, both on the server side and network timeouts. Renamed the
4590 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4592 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4593 It is now set to "smtps".
4595 22. $host_address is now set to the target address during the checking of
4596 ignore_target_hosts.
4598 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4599 being passed; this would have caused $sender_host_name to have been used if
4600 matching the list had actually called for a host name (not very likely,
4601 since this list is usually IP addresses). A host name is now passed as
4604 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4605 code that specifies a non-restarting handler (typically sigaction() in
4606 modern systems) in an attempt to fix a rare and obscure crash bug.
4608 25. Narrowed the window for a race in the daemon that could cause it to ignore
4609 SIGCHLD signals. This is not a major problem, because they are used only to
4610 wake it up if nothing else does.
4612 26. A malformed maildirsize file could cause Exim to calculate negative values
4613 for the mailbox size or file count. Odd effects could occur as a result.
4614 The maildirsize information is now recalculated if the size or filecount
4617 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4618 support for a long time. Removed HAVE_SYS_VFS_H.
4620 28. Installed the latest version of exipick from John Jetmore.
4622 29. In an address list, if the pattern was not a regular expression, an empty
4623 subject address (from a bounce message) matched only if the pattern was an
4624 empty string. Non-empty patterns were not even tested. This was the wrong
4625 because it is perfectly reasonable to use an empty address as part of a
4626 database query. An empty address is now tested by patterns that are
4627 lookups. However, all the other forms of pattern expect the subject to
4628 contain a local part and a domain, and therefore, for them, an empty
4629 address still always fails if the pattern is not itself empty.
4631 30. Exim went into a mad DNS loop when attempting to do a callout where the
4632 host was specified on an smtp transport, and looking it up yielded more
4633 than one IP address.
4635 31. Re-factored the code for checking spool and log partition space into a
4636 function that finds that data and another that does the check. The former
4637 is then used to implement four new variables: $spool_space, $log_space,
4638 $spool_inodes, and $log_inodes.
4640 32. The RFC2047 encoding function was originally intended for short strings
4641 such as real names; it was not keeping to the 75-character limit for
4642 encoded words that the RFC imposes. It now respects the limit, and
4643 generates multiple encoded words if necessary. To be on the safe side, I
4644 have increased the buffer size for the ${rfc2047: expansion operator from
4647 33. It is now permitted to omit both strings after an "if" condition; if the
4648 condition is true, the result is "true". As before, when the second string
4649 is omitted, a false condition yields an empty string. This makes it less
4650 cumbersome to write custom ACL and router conditions.
4652 34. Failure to deliver a bounce message always caused it to be frozen, even if
4653 there was an errors_to setting on the router. The errors_to setting is now
4656 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4657 canonical form (fully expanded) before being placed in
4658 $sender_host_address.
4660 36. The table in the code that translates DNS record types into text (T_A to
4661 "A" for instance) was missing entries for NS and CNAME. It is just possible
4662 that this could have caused confusion if both these types were looked up
4663 for the same domain, because the text type is used as part of Exim's
4664 per-process caching. But the chance of anyone hitting this buglet seems
4667 37. The dnsdb lookup has been extended in a number of ways.
4669 (1) There is a new type, "zns", which walks up the domain tree until it
4670 finds some nameserver records. It should be used with care.
4672 (2) There is a new type, "mxh", which is like "mx" except that it returns
4673 just the host names, not the priorities.
4675 (3) It is now possible to give a list of domains (or IP addresses) to be
4676 looked up. The behaviour when one of the lookups defers can be
4677 controlled by a keyword.
4679 (4) It is now possible to specify the separator character for use when
4680 multiple records are returned.
4682 38. The dnslists ACL condition has been extended: it is now possible to supply
4683 a list of IP addresses and/or domains to be looked up in a particular DNS
4686 39. Added log_selector=+queue_time_overall.
4688 40. When running the queue in the test harness, wait just a tad after forking a
4689 delivery process, to get repeatability of debugging output.
4691 41. Include certificate and key file names in error message when GnuTLS fails
4692 to set them up, because the GnuTLS error message doesn't include the name
4693 of the failing file when there is a problem reading it.
4695 42. Allow both -bf and -bF in the same test run.
4697 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4699 44. The "Exiscan patch" is now merged into the mainline Exim source.
4701 45. Sometimes the final signoff response after QUIT could fail to get
4702 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4703 < 0 before doing a fflush(). This bug looks as though it goes back to the
4704 introduction of TLS in release 3.20, but "sometimes" must have been rare
4705 because the tests only now provoked it.
4707 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4708 (this can affect the format of dates).
4710 47. exim_tidydb, when checking for the continued existence of a message for
4711 which it has found a message-specific retry record, was not finding
4712 messages that were in split spool directories. Consequently, it was
4713 deleting retry records that should have stayed in existence.
4715 48. Steve fixed some bugs in eximstats.
4717 49. The SPA authentication driver was not abandoning authentication and moving
4718 on to the next authenticator when an expansion was forced to fail,
4719 contradicting the general specification for all authenticators. Instead it
4720 was generating a temporary error. It now behaves as specified.
4722 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4723 (the order specifies the preference for clients). The order is now AES256,
4724 AES128, 3DES, ARCFOUR128.
4726 51. Small patch to Sieve code - explicitly set From: when generating an
4729 52. Exim crashed if a remote delivery caused a very long error message to be
4730 recorded - for instance if somebody sent an entire SpamAssassin report back
4731 as a large number of 550 error lines. This bug was coincidentally fixed by
4732 increasing the size of one of Exim's internal buffers (big_buffer) that
4733 happened as part of the Exiscan merge. However, to be on the safe side, I
4734 have made the code more robust (and fixed the comments that describe what
4737 53. Now that there can be additional text after "Completed" in log lines (if
4738 the queue_time_overall log selector is set), a one-byte patch to exigrep
4739 was needed to allow it to recognize "Completed" as not the last thing in
4742 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4743 patch that reportedly fixes this has been added. I am not expert enough to
4744 create a test for it. This is what the patch creator wrote:
4746 "I found a little strange behaviour of ldap code when working with
4747 Windows 2003 AD Domain, where users was placed in more than one
4748 Organization Units. When I tried to give exim partial DN, the exit code
4749 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4750 But simultaneously result of request was absolutely normal ldap result,
4751 so I produce this patch..."
4753 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4754 REFERENCE, so I have modified the code to exclude the patch when that macro
4757 55. Some experimental protocols are using DNS PTR records for new purposes. The
4758 keys for these records are domain names, not reversed IP addresses. The
4759 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4760 leaves it alone. Component reversal etc. now happens only for IP addresses.
4763 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4765 57. Double the size of the debug message buffer (to 2048) so that more of very
4766 long debug lines gets shown.
4768 58. The exicyclog utility now does better if the number of log files to keep
4769 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4771 59. Two changes related to the smtp_active_hostname option:
4773 (1) $smtp_active_hostname is now available as a variable.
4774 (2) The default for smtp_banner uses $smtp_active_hostname instead
4775 of $primary_hostname.
4777 60. The host_aton() function is supposed to be passed a string that is known
4778 to be a valid IP address. However, in the case of IPv6 addresses, it was
4779 not checking this. This is a hostage to fortune. Exim now panics and dies
4780 if the condition is not met. A case was found where this could be provoked
4781 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4782 components; fortuitously, this particular loophole had already been fixed
4783 by change 4.50/55 above.
4785 If there are any other similar loopholes, the new check in host_aton()
4786 itself should stop them being exploited. The report I received stated that
4787 data on the command line could provoke the exploit when Exim was running as
4788 exim, but did not say which command line option was involved. All I could
4789 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4790 running as the user.
4793 61. There was a buffer overflow vulnerability in the SPA authentication code
4794 (which came originally from the Samba project). I have added a test to the
4795 spa_base64_to_bits() function which I hope fixes it.
4798 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4799 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4801 63. The daemon start-up calls getloadavg() while still root for those OS that
4802 need the first call to be done as root, but it missed one case: when
4803 deliver_queue_load_max is set with deliver_drop_privilege. This is
4804 necessary for the benefit of the queue runner, because there is no re-exec
4805 when deliver_drop_privilege is set.
4807 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4808 This has been fixed.
4810 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4811 was in use, was not putting the data itself into the right store pool;
4812 consequently, it could be overwritten for a subsequent message in the same
4813 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4816 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4818 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4819 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4820 the function were treating the return as a boolean value, which happened to
4821 work because 0=false and not-0=true, but is not correct code.
4823 68. The host_aton() function was not handling scoped IPv6 addresses (those
4824 with, for example, "%eth0" on the end) correctly.
4826 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4827 negated items (that is, ~something) in unsigned ints. Some compilers
4828 apparently mutter when there is no cast.
4830 70. If an address verification called from an ACL failed, and did not produce a
4831 user-specific message (i.e. there was only a "system" message), nothing was
4832 put in $acl_verify_message. In this situation, it now puts the system
4835 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4836 session; change 4.31/43 added the unwanted input to the log line - except
4837 that it did not do this in the start of session case. It now does.
4839 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4840 This is wrong and can cause the other end to generate a synchronization
4841 error if it is another Exim or anything else that does the synchronization
4842 check. A QUIT command is no longer sent after a timeout.
4844 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4845 during host lookups.
4847 74. The defer_ok option of callout verification was not working if it was used
4848 when verifying addresses in header lines, that is, for this case:
4850 verify = header_sender/callout=defer_ok
4852 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4853 those file descriptors could be used for SMTP connections. If anything
4854 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4855 could be sent to the SMTP client, causing chaos. The daemon now opens
4856 stdin, stdout, and stderr to /dev/null when it puts itself into the
4859 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4860 log by default. The user can override this with suitable Perl magic.
4862 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4863 the log message when discard triggers, was not working for the DATA ACL or
4864 for the non-SMTP ACL.
4866 78. Error message wording change in sieve.c.
4868 79. If smtp_accept_max_per_host was set, the number of connections could be
4869 restricted to fewer than expected, because the daemon was trying to set up
4870 a new connection before checking whether the processes handling previous
4871 connections had finished. The check for completed processes is now done
4872 earlier. On busy systems, this bug wouldn't be noticed because something
4873 else would have woken the daemon, and it would have reaped the completed
4876 80. If a message was submitted locally by a user whose login name contained one
4877 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4878 It caused a spool format error. I have fixed the spool reading code. A
4879 related problem was that the "from" clause in the Received: line became
4880 illegal because of the space(s). It is now covered by ${quote_local_part.
4882 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4885 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4887 83. Patch from Sieve maintainer to fix unterminated string problem in
4888 "vacation" handling.
4890 84. Some minor changes to the Linux configuration files to help with other
4891 OS variants using glibc.
4893 85. One more patch for Sieve to update vacation handling to latest spec.
4896 ----------------------------------------------------
4897 See the note above about the 4.44 and 4.50 releases.
4898 ----------------------------------------------------
4904 1. Change 4.43/35 introduced a bug that caused file counts to be
4905 incorrectly computed when quota_filecount was set in an appendfile
4908 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4909 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4912 3. Give more explanation in the error message when the command for a transport
4913 filter fails to execute.
4915 4. There are several places where Exim runs a non-Exim command in a
4916 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4917 was being done only for the command run by the queryprogram router. It is
4918 now done for all such subprocesses. The other cases are: ${run, transport
4919 filters, and the commands run by the lmtp and pipe transports.
4921 5. Some older OS have a limit of 256 on the maximum number of file
4922 descriptors. Exim was using setrlimit() to set 1000 as a large value
4923 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4924 systems. I've change it so that if it can't get 1000, it tries for 256.
4926 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4927 was an oversight, and furthermore, ever since the addition of extra
4928 controls (e.g. 4.43/32), the checks on when to allow different forms of
4929 "control" were broken. There should now be diagnostics for all cases when a
4930 control that does not make sense is encountered.
4932 7. $recipients is now available in the predata ACL (oversight).
4934 8. Tidy the search cache before the fork to do a delivery from a message
4935 received from the command line. Otherwise the child will trigger a lookup
4936 failure and thereby defer the delivery if it tries to use (for example) a
4937 cached ldap connection that the parent has called unbind on.
4939 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4940 of $address_data from the recipient verification was clobbered by the
4941 sender verification.
4943 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4944 was its contents. (It was OK if the option was not defined at all.)
4946 11. A "Completed" log line is now written for messages that are removed from
4947 the spool by the -Mrm option.
4949 12. $host_address is now set to the target address during the checking of
4950 ignore_target_hosts.
4952 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4953 being passed; this would have caused $sender_host_name to have been used if
4954 matching the list had actually called for a host name (not very likely,
4955 since this list is usually IP addresses). A host name is now passed as
4958 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4959 code that specifies a non-restarting handler (typically sigaction() in
4960 modern systems) in an attempt to fix a rare and obscure crash bug.
4962 15. Narrowed the window for a race in the daemon that could cause it to ignore
4963 SIGCHLD signals. This is not a major problem, because they are used only to
4964 wake it up if nothing else does.
4966 16. A malformed maildirsize file could cause Exim to calculate negative values
4967 for the mailbox size or file count. Odd effects could occur as a result.
4968 The maildirsize information is now recalculated if the size or filecount
4971 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4972 support for a long time. Removed HAVE_SYS_VFS_H.
4974 18. Updated exipick to current release from John Jetmore.
4976 19. Allow an empty sender to be matched against a lookup in an address list.
4977 Previously the only cases considered were a regular expression, or an
4980 20. Exim went into a mad DNS lookup loop when doing a callout where the
4981 host was specified on the transport, if the DNS lookup yielded more than
4984 21. The RFC2047 encoding function was originally intended for short strings
4985 such as real names; it was not keeping to the 75-character limit for
4986 encoded words that the RFC imposes. It now respects the limit, and
4987 generates multiple encoded words if necessary. To be on the safe side, I
4988 have increased the buffer size for the ${rfc2047: expansion operator from
4991 22. Failure to deliver a bounce message always caused it to be frozen, even if
4992 there was an errors_to setting on the router. The errors_to setting is now
4995 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4996 canonical form (fully expanded) before being placed in
4997 $sender_host_address.
4999 24. Updated eximstats to version 1.33
5001 25. Include certificate and key file names in error message when GnuTLS fails
5002 to set them up, because the GnuTLS error message doesn't include the name
5003 of the failing file when there is a problem reading it.
5005 26. Expand error message when OpenSSL has problems setting up cert/key files.
5008 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5009 (this can affect the format of dates).
5011 28. exim_tidydb, when checking for the continued existence of a message for
5012 which it has found a message-specific retry record, was not finding
5013 messages that were in split spool directories. Consequently, it was
5014 deleting retry records that should have stayed in existence.
5016 29. eximstats updated to version 1.35
5017 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5018 1.35 - bugfix such that pie charts by volume are generated correctly
5020 30. The SPA authentication driver was not abandoning authentication and moving
5021 on to the next authenticator when an expansion was forced to fail,
5022 contradicting the general specification for all authenticators. Instead it
5023 was generating a temporary error. It now behaves as specified.
5025 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5026 (the order specifies the preference for clients). The order is now AES256,
5027 AES128, 3DES, ARCFOUR128.
5029 31. Small patch to Sieve code - explicitly set From: when generating an
5032 32. Exim crashed if a remote delivery caused a very long error message to be
5033 recorded - for instance if somebody sent an entire SpamAssassin report back
5034 as a large number of 550 error lines. This bug was coincidentally fixed by
5035 increasing the size of one of Exim's internal buffers (big_buffer) that
5036 happened as part of the Exiscan merge. However, to be on the safe side, I
5037 have made the code more robust (and fixed the comments that describe what
5040 33. Some experimental protocols are using DNS PTR records for new purposes. The
5041 keys for these records are domain names, not reversed IP addresses. The
5042 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5043 leaves it alone. Component reversal etc. now happens only for IP addresses.
5046 34. The host_aton() function is supposed to be passed a string that is known
5047 to be a valid IP address. However, in the case of IPv6 addresses, it was
5048 not checking this. This is a hostage to fortune. Exim now panics and dies
5049 if the condition is not met. A case was found where this could be provoked
5050 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5051 components; fortuitously, this particular loophole had already been fixed
5052 by change 4.50/55 or 4.44/33 above.
5054 If there are any other similar loopholes, the new check in host_aton()
5055 itself should stop them being exploited. The report I received stated that
5056 data on the command line could provoke the exploit when Exim was running as
5057 exim, but did not say which command line option was involved. All I could
5058 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5059 running as the user.
5062 35. There was a buffer overflow vulnerability in the SPA authentication code
5063 (which came originally from the Samba project). I have added a test to the
5064 spa_base64_to_bits() function which I hope fixes it.
5067 36. The daemon start-up calls getloadavg() while still root for those OS that
5068 need the first call to be done as root, but it missed one case: when
5069 deliver_queue_load_max is set with deliver_drop_privilege. This is
5070 necessary for the benefit of the queue runner, because there is no re-exec
5071 when deliver_drop_privilege is set.
5073 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5074 was in use, was not putting the data itself into the right store pool;
5075 consequently, it could be overwritten for a subsequent message in the same
5076 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5079 38. Sometimes the final signoff response after QUIT could fail to get
5080 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5081 < 0 before doing a fflush(). This bug looks as though it goes back to the
5082 introduction of TLS in release 3.20, but "sometimes" must have been rare
5083 because the tests only now provoked it.
5089 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5090 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5091 Now it returns an integer. A number of calls were still expecting a T/F
5092 return. Fortuitously, in all cases, the tests worked in OK situations,
5093 which is the norm. However, things would have gone wrong on any write
5094 failures on the smtp file descriptor. This function is used when sending
5095 messages over SMTP and also when doing verify callouts.
5097 2. When Exim is called to do synchronous delivery of a locally submitted
5098 message (the -odf or -odi options), it no longer closes stderr before doing
5101 3. Implemented the mua_wrapper option.
5103 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5105 5. Implemented the functions header_remove(), header_testname(),
5106 header_add_at_position(), and receive_remove_recipient(), and exported them
5109 6. If an ACL "warn" statement specified the addition of headers, Exim already
5110 inserted X-ACL-Warn: at the start if there was no header name. However, it
5111 was not making this test for the second and subsequent header lines if
5112 there were newlines in the string. This meant that an invalid header could
5113 be inserted if Exim was badly configured.
5115 7. Allow an ACL "warn" statement to add header lines at the start or after all
5116 the Received: headers, as well as at the end.
5118 8. Added the rcpt_4xx retry error code.
5120 9. Added postmaster_mailfrom=xxx to callout verification option.
5122 10. Added mailfrom=xxxx to the callout verification option, for verify=
5125 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5126 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5128 12. Inserted some casts to stop certain compilers warning when using pointer
5129 differences as field lengths or precisions in printf-type calls (mostly
5130 affecting debugging statements).
5132 13. Added optional readline() support for -be (dynamically loaded).
5134 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5135 same clock tick as a message's arrival, so that its received time was the
5136 same as the "first fail" time on the retry record, and that message
5137 remained on the queue past the ultimate address timeout, every queue runner
5138 would try a delivery (because it was past the ultimate address timeout) but
5139 after another failure, the ultimate address timeout, which should have then
5140 bounced the address, did not kick in. This was a "< instead of <=" error;
5141 in most cases the first failure would have been in the next clock tick
5142 after the received time, and all would be well.
5144 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5145 being recognized when the domain list was tested by the match_domain
5146 condition in an expansion string.
5148 16. Added the ${str2b64: operator.
5150 17. Exim was always calling setrlimit() to set a large limit for the number of
5151 processes, without checking whether the existing limit was already
5152 adequate. (It did check for the limit on file descriptors.) Furthermore,
5153 errors from getrlimit() and setrlimit() were being ignored. Now they are
5154 logged to the main and panic logs, but Exim does carry on, to try to do its
5155 job under whatever limits there are.
5157 18. Imported PCRE 5.0.
5159 19. Trivial typo in log message " temporarily refused connection" (the leading
5162 20. If the log selector return_path_on_delivery was set and an address was
5163 redirected to /dev/null, the delivery process crashed because it assumed
5164 that a return path would always be set for a "successful" delivery. In this
5165 case, the whole delivery is bypassed as an optimization, and therefore no
5168 21. Internal re-arrangement: the function for sending a challenge and reading
5169 a response while authentication was assuming a zero-terminated challenge
5170 string. It's now changed to take a pointer and a length, to allow for
5171 binary data in such strings.
5173 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5175 23. Exim was not respecting finduser_retries when seeking the login of the
5176 uid under which it was called; it was always trying 10 times. (The default
5177 setting of finduser_retries is zero.) Also, it was sleeping after the final
5178 failure, which is pointless.
5180 24. Implemented tls_on_connect_ports.
5182 25. Implemented acl_smtp_predata.
5184 26. If the domain in control=submission is set empty, Exim assumes that the
5185 authenticated id is a complete email address when it generates From: or
5186 Sender: header lines.
5188 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5189 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5190 chown and chgrp in /bin and hostname in /usr/bin.
5192 28. Exim was keeping the "process log" file open after each use, just as it
5193 does for the main log. This opens the possibility of it remaining open for
5194 long periods when the USR1 signal hits a daemon. Occasional processlog
5195 errors were reported, that could have been caused by this. Anyway, it seems
5196 much more sensible not to leave this file open at all, so that is what now
5199 29. The long-running daemon process does not normally write to the log once it
5200 has entered its main loop, and it closes the log before doing so. This is
5201 so that log files can straightforwardly be renamed and moved. However,
5202 there are a couple of unusual error situations where the daemon does write
5203 log entries, and I had neglected to close the log afterwards.
5205 30. The text of an SMTP error response that was received during a remote
5206 delivery was being truncated at 512 bytes. This is too short for some of
5207 the long messages that one sometimes sees. I've increased the limit to
5210 31. It is now possible to make retry rules that apply only when a message has a
5211 specific sender, in particular, an empty sender.
5213 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5214 it possible to be selective about when SMTP synchronization is enforced.
5216 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5218 32. Implemented hosts_connection_nolog.
5220 33. Added an ACL for QUIT.
5222 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5225 35. Added mailbox_size and mailbox_filecount to appendfile.
5227 36. Added control = no_multiline_responses to ACLs.
5229 37. There was a bug in the logic of the code that waits for the clock to tick
5230 in the case where the clock went backwards by a substantial amount such
5231 that the microsecond fraction of "now" was more than the microsecond
5232 fraction of "then" (but the whole seconds number was less).
5234 38. Added support for the libradius Radius client library this is found on
5235 FreeBSD (previously only the radiusclient library was supported).
5241 1. When certain lookups returned multiple values in the form name=value, the
5242 quoting of the values was not always being done properly. Specifically:
5243 (a) If the value started with a double quote, but contained no whitespace,
5245 (b) If the value contained whitespace other than a space character (i.e.
5246 tabs or newlines or carriage returns) it was not quoted.
5247 This fix has been applied to the mysql and pgsql lookups by writing a
5248 separate quoting function and calling it from the lookup code. The fix
5249 should probably also be applied to nisplus, ibase and oracle lookups, but
5250 since I cannot test any of those, I have not disturbed their existing code.
5252 2. A hit in the callout cache for a specific address caused a log line with no
5253 reason for rejecting RCPT. Now it says "Previous (cached) callout
5254 verification failure".
5256 3. There was an off-by-one bug in the queryprogram router. An over-long
5257 return line was truncated at 256 instead of 255 characters, thereby
5258 overflowing its buffer with the terminating zero. As well as fixing this, I
5259 have increased the buffer size to 1024 (and made a note to document this).
5261 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5262 when Exim is waiting for an SMTP response from a remote server, Exim
5263 restarts its select() call on the socket, thereby resetting its timeout.
5264 This is not a problem when such interrupts are rare. Somebody set up a cron
5265 job to run exiwhat every 2 minutes, which is less than the normal select()
5266 timeout (5 or 10 minutes). This meant that the select() timeout never
5267 kicked in because it was always reset. I have fixed this by comparing the
5268 time when an interrupt arrives with the time at the start of the first call
5269 to select(). If more time than the timeout has elapsed, the interrupt is
5270 treated as a timeout.
5272 5. Some internal re-factoring in preparation for the addition of Sieve
5273 extensions (by MH). In particular, the "personal" test is moved to a
5274 separate function, and given an option for scanning Cc: and Bcc: (which is
5275 not set for Exim filters).
5277 6. When Exim created an email address using the login of the caller as the
5278 local part (e.g. when creating a From: or Sender: header line), it was not
5279 quoting the local part when it contained special characters such as @.
5281 7. Installed new OpenBSD configuration files.
5283 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5284 try to make them clearer.
5286 9. Callout options, other than the timeout value, were being ignored when
5287 verifying sender addresses in header lines. For example, when using
5289 verify = header_sender/callout=no_cache
5291 the cache was (incorrectly) being used.
5293 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5294 only the Cygwin environment.
5296 11. When return_path_on_delivery was set as a log selector, if different remote
5297 addresses in the same message used different return paths and parallel
5298 remote delivery occurred, the wrong values would sometimes be logged.
5299 (Whenever a remote delivery process finished, the return path value from
5300 the most recently started remote delivery process was logged.)
5302 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5303 lines when AUTH and/or TLS are in use. This is the "received protocol"
5304 field. Exim used to use "asmtp" for authenticated SMTP, without any
5305 indication (in the protocol name) for TLS use. Now it follows the RFC and
5306 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5307 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5308 names appear in log lines as well as in Received: header lines.
5310 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5311 extensions, and comparison tests, and to fix some bugs.
5313 14. Changes to the "personal" filter test:
5315 (1) The test was buggy in that it was just doing the equivalent of
5316 "contains" tests on header lines. For example, if a user's address was
5317 anne@some.where, the "personal" test would incorrectly be true for
5319 To: susanne@some.where
5321 This test is now done by extracting each address from the header in turn,
5322 and checking the entire address. Other tests that are part of "personal"
5323 are now done using regular expressions (for example, to check local parts
5324 of addresses in From: header lines).
5326 (2) The list of non-personal local parts in From: addresses has been
5327 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5328 taken from the Sieve specification recommendations.
5330 (3) If the message contains any header line starting with "List-" it is
5331 treated as non-personal.
5333 (4) The test for "circular" in the Subject: header line has been removed
5334 because it now seems ill-conceived.
5336 15. Minor typos in src/EDITME comments corrected.
5338 16. Installed latest exipick from John Jetmore.
5340 17. If headers_add on a router specified a text string that was too long for
5341 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5342 of string_sprintf() is now avoided.
5344 18. $message_body_size was not set (it was always zero) when running the DATA
5345 ACL and the local_scan() function.
5347 19. For the "mail" command in an Exim filter, no default was being set for
5348 the once_repeat time, causing a random time value to be used if "once" was
5349 specified. (If the value happened to be <= 0, no repeat happened.) The
5350 default is now 0s, meaning "never repeat". The "vacation" command was OK
5351 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5352 (I found it when inspecting the code).
5354 20. There is now an overall timeout for performing a callout verification. It
5355 defaults to 4 times the callout timeout, which applies to individual SMTP
5356 commands during the callout. The overall timeout applies when there is more
5357 than one host that can be tried. The timeout is checked before trying the
5358 next host. This prevents very long delays if there are a large number of
5359 hosts and all are timing out (e.g. when the network connections are timing
5360 out). The value of the overall timeout can be changed by specifying an
5361 additional sub-option for "callout", called "maxwait". For example:
5363 verify = sender/callout=5s,maxwait=20s
5365 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5366 to the end before writing, but this should make it even safer).
5368 22. Exim was forgetting that it had advertised PIPELINING for the second and
5369 subsequent messages on an SMTP connection. It was also not resetting its
5370 memory on STARTTLS and an internal HELO.
5372 23. When Exim logs an SMTP synchronization error within a session, it now
5373 records whether PIPELINING has been advertised or not.
5375 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5376 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5377 rather than long int.
5379 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5381 26. Added the never_mail option to autoreply.
5387 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5388 crash if the getsockname() call failed; this can happen if a connection is
5389 closed very soon after it is established. The problem was simply in the
5390 order in which certain operations were done, causing Exim to try to write
5391 to the SMTP stream before it had set up the file descriptor. The bug has
5392 been fixed by making things happen in the correct order.
5398 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5399 before the connection was closed, thus losing the rejection response.
5401 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5402 some early Solaris releases, but causes trouble in current releases where
5403 socklen_t is defined.
5405 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5408 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5411 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5412 that releasing the top of it at the end releases what was used for sub-
5413 expansions (unless the block got too big). However, discard this block if
5414 the first thing is a variable or header, so that we can use its block when
5415 it is dynamic (useful for very large $message_headers, for example).
5417 6. Lookups now cache *every* query, not just the most recent. A new, separate
5418 store pool is used for this. It can be recovered when all lookup caches are
5419 flushed. Lookups now release memory at the end of their result strings.
5420 This has involved some general refactoring of the lookup sources.
5422 7. Some code has been added to the store_xxx() functions to reduce the amount
5423 of flapping under certain conditions.
5425 8. log_incoming_interface used to affect only the <= reception log lines. Now
5426 it causes the local interface and port to be added to several more SMTP log
5427 lines, for example "SMTP connection from", and rejection lines.
5429 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5431 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5433 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5434 could be overwritten at the end of the current message (or the start of a
5435 new message if it was set in a HELO ACL). The value is now preserved for
5436 the duration of the SMTP connection.
5438 12. If a transport had a headers_rewrite setting, and a matching header line
5439 contained an unqualified address, that address was qualified, even if it
5440 did not match any rewriting rules. The underlying bug was that the values
5441 of the flags that permit the existence of unqualified sender and recipient
5442 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5443 non-local messages, and by -bnq for local messages) were not being
5444 preserved with the message after it was received.
5446 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5447 "next input=" as part of the text comprising the host identity instead of
5448 the correct text. The code was using the same buffer for two different
5449 strings. However, depending on which order the printing function evaluated
5450 its arguments, the bug did not always show up. Under Linux, for example, my
5451 test suite worked just fine.
5453 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5454 doesn't work with some older versions of Perl. It has been changed to "my",
5455 which in any case is probably the better facility to use.
5457 15. A really picky compiler found some instances of statements for creating
5458 error messages that either had too many or two few arguments for the format
5461 16. The size of the buffer for calls to the DNS resolver has been increased
5462 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5463 for addresses that have a lot of PTR records. This alleviates a problem; it
5464 does not fully solve it.
5466 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5467 buffer now truncates the list and logs the incident, which is the same
5468 action as happens when Exim is looking up a host name and its aliases.
5469 Previously in this situation something unpredictable would happen;
5470 sometimes it was "internal error: store_reset failed".
5472 18. If a server dropped the connection unexpectedly when an Exim client was
5473 using GnuTLS and trying to read a response, the client delivery process
5474 crashed while trying to generate an error log message.
5476 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5477 string, for example:
5479 warn message = H1: something\nH2: something
5481 the text was added as a single header line from Exim's point of view
5482 though it ended up OK in the delivered message. However, searching for the
5483 second and subsequent header lines using $h_h2: did not work. This has been
5484 fixed. Similarly, if a system filter added multiple headers in this way,
5485 the routers could not see them.
5487 20. Expanded the error message when iplsearch is called with an invalid key to
5488 suggest using net-iplsearch in a host list.
5490 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5491 ACLs are no longer actually imposed (and a message to that effect is
5494 22. If a "gecos" field in a passwd entry contained escaped characters, in
5495 particular, if it contained a \" sequence, Exim got it wrong when building
5496 a From: or a Sender: header from that name. A second bug also caused
5497 incorrect handling when an unquoted " was present following a character
5498 that needed quoting.
5500 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5501 was not being matched caselessly.
5503 24. Arranged for all hyphens in the exim.8 source to be escaped with
5506 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5507 properly. Recipient callout cache records were still being keyed to include
5508 the sender, even when use_sender was set false. This led to far more
5509 callouts that were necessary. The sender is no longer included in the key
5510 when use_sender is false.
5512 26. Added "control = submission" modifier to ACLs.
5514 27. Added the ${base62d: operator to decode base 62 numbers.
5516 28. dnsdb lookups can now access SRV records.
5518 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5519 the configuration file.
5521 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5522 (-v) mode. This makes the output for a verbose queue run more intelligible.
5524 31. Added a use_postmaster feature to recipient callouts.
5526 32. Added the $body_zerocount variable, containing the number of binary zero
5527 bytes in the message body.
5529 33. The time of last modification of the "new" subdirectory is now used as the
5530 "mailbox time last read" when there is a quota error for a maildir
5533 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5535 35. Added +ignore_unknown as a special item in host lists.
5537 36. Code for decoding IPv6 addresses in host lists is now included, even if
5538 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5539 address was recognized as an IP address, but was then not correctly decoded
5540 into binary, causing unexpected and incorrect effects when compared with
5547 1. Very minor rewording of debugging text in manualroute to say "list of
5548 hosts" instead of "hostlist".
5550 2. If verify=header_syntax was set, and a header line with an unqualified
5551 address (no domain) and a large number of spaces between the end of the
5552 name and the colon was received, the reception process suffered a buffer
5553 overflow, and (when I tested it) crashed. This was caused by some obsolete
5554 code that should have been removed. The fix is to remove it!
5556 3. When running in the test harness, delay a bit after writing a bounce
5557 message to get a bit more predictability in the log output.
5559 4. Added a call to search_tidyup() just before forking a reception process. In
5560 theory, someone could use a lookup in the expansion of smtp_accept_max_
5561 per_host which, without the tidyup, could leave open a database connection.
5563 5. Added the variables $recipient_data and $sender_data which get set from a
5564 lookup success in an ACL "recipients" or "senders" condition, or a router
5565 "senders" option, similar to $domain_data and $local_part_data.
5567 6. Moved the writing of debug_print from before to after the "senders" test
5570 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5571 problems for message scanning, either using a data ACL, or using
5572 local_scan() because the Received: header was not generated till after they
5573 were called (in order to set the time as the time of reception completion).
5574 I have revised the way this works. The header is now generated after the
5575 body is received, but before the ACL or local_scan() are called. After they
5576 are run, the timestamp in the header is updated.
5582 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5583 before starting a queue runner without re-exec. This happened only when
5584 deliver_drop_privilege was set or when the Exim user was set to root. The
5585 effect of the bug was that timeouts during subsequent deliveries caused
5586 crashes instead of being properly handled. The handler is now left at its
5587 default (and expected) setting.
5589 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5590 message, again when deliver_drop_privilege is set or Exim is run as root.
5591 The bug described in (1) was not present in this case, but the tidying up
5592 of the other signals was missing. I have made the two cases consistent.
5594 3. The ignore_target_hosts setting on a manualroute router was being ignored
5595 for hosts that were looked up using the /MX notation.
5597 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5600 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5601 operated on the sender address. After changing the $sender_address to <>
5602 for the sender address verify, Exim was re-instated it as the original
5603 (before rewriting) address, but remembering that it had rewritten it, so it
5604 wasn't rewriting it again. This bug also had the effect of breaking the
5605 sender address verification caching when the sender address was rewritten.
5607 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5608 This has been changed so that if the ip literal address matches
5609 ignore_target_hosts, the router declines.
5611 7. Added expansion conditions match_domain, match_address, and match_local_
5612 part (NOT match_host).
5614 8. The placeholder for the Received: header didn't have a length field set.
5616 9. Added code to Exim itself and to exim_lock to test for a specific race
5617 condition that could lead to file corruption when using MBX delivery. The
5618 issue is with the lockfile that is created in /tmp. If this file is removed
5619 after a process has opened it but before that process has acquired a lock,
5620 there is the potential for a second process to recreate the file and also
5621 acquire a lock. This could lead to two Exim processes writing to the file
5622 at the same time. The added code performs the same test as UW imapd; it
5623 checks after acquiring the lock that its file descriptor still refers to
5624 the same named file.
5626 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5627 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5630 11. Added the smtp_active_hostname option. If used, this will typically be made
5631 to depend on the incoming interface address. Because $interface_address is
5632 not set up until the daemon has forked a reception process, error responses
5633 that can happen earlier (such as "too many connections") no longer contain
5636 12. If an expansion in a condition on a "warn" statement fails because a lookup
5637 defers, the "warn" statement is abandoned, and the next ACL statement is
5638 processed. Previously this caused the whole ACL to be aborted.
5640 13. Added the iplsearch lookup type.
5642 14. Added ident_timeout as a log selector.
5644 15. Added tls_certificate_verified as a log selector.
5646 16. Added a global option tls_require_ciphers (compare the smtp transport
5647 option of the same name). This controls incoming TLS connections.
5649 17. I finally figured out how to make tls_require_ciphers do a similar thing
5650 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5651 before starting the TLS session.
5653 18. Tabs are now shown as \t in -bP output.
5655 19. If the log selector return_path_on_delivery was set, Exim crashed when
5656 bouncing a message because it had too many Received: header lines.
5658 20. If two routers both had headers_remove settings, and the first one included
5659 a superfluous trailing colon, the final name in the first list and the
5660 first name in the second list were incorrectly joined into one item (with a
5661 colon in the middle).
5667 1. Added -C and -D options to the exinext utility, mainly to make it easier
5668 to include in the automated testing, but these could be helpful when
5669 multiple configurations are in use.
5671 2. The exinext utility was not formatting the output nicely when there was
5672 an alternate port involved in the retry record key, nor when there was a
5673 message id as well (for retries that were specific to a specific message
5674 and a specific host). It was also confused by IPv6 addresses, because of
5675 the additional colons they contain. I have fixed the IPv4 problem, and
5676 patched it up to do a reasonable job for IPv6.
5678 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5679 delivery, the log line now contains "pipelined" if PIPELINING was used.
5681 4. An SMTP transport process used to panic and die if the bind() call to set
5682 an explicit outgoing interface failed. This has been changed; it is now
5683 treated in the same way as a connect() failure.
5685 5. A reference to $sender_host_name in the part of a conditional expansion
5686 that was being skipped was still causing a DNS lookup. This no longer
5689 6. The def: expansion condition was not recognizing references to header lines
5690 that used bh_ and bheader_.
5692 7. Added the _cache feature to named lists.
5694 8. The code for checking quota_filecount in the appendfile transport was
5695 allowing one more file than it should have been.
5697 9. For compatibility with Sendmail, the command line option
5705 and sets the incoming protocol and host name (for trusted callers). The
5706 host name and its colon can be omitted when only the protocol is to be set.
5707 Note the Exim already has two private options, -pd and -ps, that refer to
5708 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5709 "s", but I don't think that's a major issue.
5711 10. A number of refactoring changes to the code, none of which should affect
5714 (a) The number of logging options was getting close to filling up the
5715 32-bit word that was used as a bit map. I have split them into two classes:
5716 those that are passed in the argument to log_write(), and those that are
5717 only ever tested independently outside of that function. These are now in
5718 separate 32-bit words, so there is plenty of room for expansion again.
5719 There is no change in the user interface or the logging behaviour.
5721 (b) When building, for example, log lines, the code previously used a
5722 macro that called string_cat() twice, in order to add two strings. This is
5723 not really sufficiently general. Furthermore, there was one instance where
5724 it was actually wrong because one of the argument was used twice, and in
5725 one call a function was used. (As it happened, calling the function twice
5726 did not affect the overall behaviour.) The macro has been replaced by a
5727 function that can join an arbitrary number of extra strings onto a growing
5730 (c) The code for expansion conditions now uses a table and a binary chop
5731 instead of a serial search (which was left over from when there were very
5732 few conditions). Also, it now recognizes conditions like "pam" even when
5733 the relevant support is not compiled in: a suitably worded error message is
5734 given if an attempt is made to use such a condition.
5736 11. Added ${time_interval:xxxxx}.
5738 12. A bug was causing one of the ddress fields not to be passed back correctly
5739 from remote delivery subprocesses. The field in question was not being
5740 subsequently used, so this caused to problems in practice.
5742 13. Added new log selectors queue_time and deliver_time.
5744 14. Might have fixed a bug in maildirsizefile handling that threw up
5745 "unexpected character" debug warnings, and recalculated the data
5746 unnecessarily. In any case, I expanded the warning message to give more
5749 15. Added the message "Restricted characters in address" to the statements in
5750 the default ACL that block characters like @ and % in local parts.
5752 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5753 Three changes have been made:
5755 (a) There was a serious bug; a negative response to MAIL caused the whole
5756 recipient domain to be cached as invalid, thereby blocking all messages
5757 to all local parts at the same domain, from all senders. This bug has
5758 been fixed. The domain is no longer cached after a negative response to
5759 MAIL if the sender used is not empty.
5761 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5764 (c) A new callout option, "use_sender" has been added for people who want
5765 the modified behaviour.
5771 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5774 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5775 indeed breaks things for older releases.
5777 3. Added additional logging to the case where there is a problem reading data
5778 from a filter that is running in a subprocess using a pipe, in order to
5779 try to track down a specific problem.
5781 4. Testing facility fudge: when running in the test harness and attempting
5782 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5783 getting "No route to host". Convert this to a timeout.
5785 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5788 6. Some OS don't have socklen_t but use size_t instead. This affects the
5789 fifth argument of getsockopt() amongst other things. This is now
5790 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5791 can be set for individual OS. I have set it for SunOS5, OSF1, and
5792 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5793 some earlier ones do not.
5795 7. Change 4.30/15 was not doing the test caselessly.
5797 8. The standard form for an IPv6 address literal was being rejected by address
5798 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5799 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5800 this, as well as the form without the "IPv6" on the front (but only when
5801 address literals are enabled, of course).
5803 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5805 10. Exim crashed if a message with an empty sender address specified by -f
5806 encountered a router with an errors_to setting. This could be provoked only
5807 by a command such as
5811 where an empty string was supplied; "<>" did not hit this bug.
5813 11. Installed PCRE release 4.5.
5815 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5816 remained set. It is now erased.
5818 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5819 times from message ids (which are base 36 rather than the normal 62).
5821 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5822 were being counted as actual protocol errors, and logged if the log
5823 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5824 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5825 and DATA following a set of rejected RCPTs do not count as protocol errors.
5826 In other words, Exim assumes they were pipelined, though this may not
5827 actually be the case. Of course, in all cases the client gets an
5828 appropriate error code.
5830 15. If a lookup fails in an ACL condition, a message about the failure may
5831 be available; it is used if testing the ACL cannot continue, because most
5832 such messages specify what the cause of the deferral is. However, some
5833 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5834 that caused an old message to be retained and used if a later statement
5835 caused a defer, replacing the real cause of the deferral.
5837 16. If an IP address had so many PTR records that the DNS lookup buffer
5838 was not large enough to hold them, Exim could crash while trying to process
5839 the truncated data. It now detects and logs this case.
5841 17. Further to 4.21/58, another change has been made: if (and only if) the
5842 first line of a message (the first header line) ends with CRLF, a bare LF
5843 in a subsequent header line has a space inserted after it, so as not to
5844 terminate the header.
5846 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5847 unnecessarily, used atoi() instead of strtol(), and didn't check the
5848 termination when getting file sizes from file names by regex.
5850 19. Completely re-implemented the support for maildirsize files, in the light
5851 of a number of problems with the previous contributed implementation
5852 (4.30/29). In particular:
5854 . If the quota is zero, the maildirsize file is maintained, but no quota is
5857 . If the maildir directory does not exist, it is created before any attempt
5858 to write a maildirsize file.
5860 . The quota value in the file is just a cache; if the quota is changed in
5861 the transport, the new value overrides.
5863 . A regular expression is available for excluding directories from the
5866 20. The autoreply transport checks the characters in options that define the
5867 message's headers; it allows continued headers, but it was checking with
5868 isspace() after an embedded newline instead of explicitly looking for a
5871 21. If all the "regular" hosts to which an address was routed had passed their
5872 expiry times, and had not reached their retry times, the address was
5873 bounced, even if fallback hosts were defined. Now Exim should go on to try
5876 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5877 equivalent code in the SMTP transport. Some hosts send humungous responses
5878 to HELO/EHLO, more than 1024 it seems.
5880 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5881 gives compiler warnings in some environments. I've now done it "properly",
5884 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5885 (because of problems with the built-in one) was declared to return uschar *
5886 instead of char *, causing compiler failure.
5888 25. Fixed a file descriptor leak when processing alias/forward files.
5890 26. Fixed a minor format string issue in dbfn.c.
5892 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5894 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5895 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5898 29. When a sender address is verified, it is cached, to save repeating the test
5899 when there is more than one recipient in a message. However, when the
5900 verification involves a callout, it is possible for different callout
5901 options to be set for different recipients. It is too complicated to keep
5902 track of this in the cache, so now Exim always runs a verification when a
5903 callout is required, relying on the callout cache for the optimization.
5904 The overhead is duplication of the address routing, but this should not be
5907 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5908 to be verified with callout=postmaster, and the main callout worked but the
5909 postmaster check failed, the verification correctly failed. However, if a
5910 subsequent RCPT command asked for sender verification *without* the
5911 postmaster check, incorrect caching caused this verification also to fail,
5914 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5915 it was not caching the DNS options (qualify_single, search_parents) that
5916 were used when the lookup failed. A subsequent lookup with different
5917 options therefore always gave the same answer, though there were cases
5918 where it should not have. (Example: a "domains = !$mx_any" option on a
5919 dnslookup router: the "domains" option is always processed without any
5920 widening, but the router might have qualify_single set.) Now Exim uses the
5921 cached value only when the same options are set.
5923 32. Added John Jetmore's "exipick" utility to the distribution.
5925 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5926 than a timeout (e.g. a certificate is required, and is not provided), an
5927 Exim server now closes the connection immediately. Previously it waited for
5928 the client to close - but if the client is SSL, it seems that they each
5929 wait for each other, leading to a delay before one of them times out.
5931 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5932 maintained 0.8.x compatibility because I don't think many are using it, and
5933 it is clearly obsolete.
5935 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5938 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5939 client certificate was expired. A simple patch fixes this, though I don't
5940 understand the full logic of why the verify callback is called multiple
5943 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5944 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5945 which causes problems with some clients (such as the Certicom SSL Plus
5946 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5947 disables the coutermeasure allowing Eudora to connect."
5949 38. Exim was not checking that a write() to a log file succeeded. This could
5950 lead to Bad Things if a log got too big, in particular if it hit a file
5951 size limit. Exim now panics and dies if it cannot write to a log file, just
5952 as it does if it cannot open a log file.
5954 39. Modified OS/Makefile-Linux so that it now contains
5956 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5958 The two -D definitions ensure that Exim is compiled with large file
5959 support, which makes it possible to handle log files that are bigger than
5962 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5963 instance) a domain was checked against a named list that involved a lookup,
5964 causing $domain_data to be set, then another domain was checked against the
5965 same list, then the first domain was re-checked, the value of $domain_data
5966 after the final check could be wrong. In particular, if the second check
5967 failed, it could be set empty. This bug probably also applied to
5970 41. The strip_trailing_dot option was not being applied to the address given
5971 with the -f command-line option.
5973 42. The code for reading a message's header from the spool was incrementing
5974 $received_count, but never initializing it. This meant that the value was
5975 incorrect (doubled) while delivering a message in the same process in which
5976 it was received. In the most common configuration of Exim, this never
5977 happens - a fresh exec is done - but it can happen when
5978 deliver_drop_privilege is set.
5980 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5981 it now includes up to 150 characters of the unexpected data in the log
5984 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5985 and building data strings. The size of both of these buffers was 10 000
5986 bytes - far larger than anybody would *ever* want, thought I. Needless to
5987 say, somebody hit the limit. I have increased the maximum line length to
5988 20 000 and the maximum data length of concatenated lines to 100 000. I have
5989 also fixed two bugs, because there was no checking on these buffers. Tsk,
5990 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5991 buffer is too small.
5993 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5994 lsearch lookups. Now it does.
5996 46. When parsing a route_list item in a manualroute router, a fixed-length
5997 buffer was used for the list of hosts. I made this 1024 bytes long,
5998 thinking that nobody would ever have a list of hosts that long. Wrong.
5999 Somebody had a whole pile of complicated expansion conditions, and the
6000 string was silently truncated, leading to an expansion error. It turns out
6001 that it is easier to change to an unlimited length (owing to other changes
6002 that have happened since this code was originally written) than to build
6003 structure for giving a limitation error. The length of the item that
6004 expands into the list of hosts is now unlimited.
6006 47. The lsearch lookup could not handle data where the length of text line was
6007 more than 4095 characters. Such lines were truncated, leading to shortened
6008 data being returned. It should now handle lines of any length.
6010 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6011 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6014 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6015 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6016 no longer happens in comment lines. A list of replacements is now placed
6017 at the head of all of the source files, except those whose only change is
6018 to replace PERL_COMMAND in the very first #! line.
6020 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6021 messages on the queue, with a bottom-up merge sort, using code contributed
6022 by Michael Haardt. This should make operations like -bp somewhat faster on
6023 large queues. It won't affect queue runners, except when queue_run_in_order
6026 51. Installed eximstats 1.31 in the distribution.
6028 52. Added support for SRV lookups to the dnslookup router.
6030 53. If an ACL referred to $message_body or $message_body_end, the value was not
6031 reset for any messages that followed in the same SMTP session.
6033 54. The store-handling optimization for building very long strings was not
6034 differentiating between the different store pools. I don't think this
6035 actually made any difference in practice, but I've tidied it.
6037 55. While running the routers to verify a sender address, $sender_address
6038 was still set to the sender address. This is wrong, because when routing to
6039 send a bounce to the sender, it would be empty. Therefore, I have changed
6040 it so that, while verifying a sender address, $sender_address is set to <>.
6041 (There is no change to what happens when verifying a recipient address.)
6043 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6044 target A or AAAA records (if not already returned) without resetting the
6045 qualify_single or search_parents options of the DNS resolver. These are
6046 inappropriate in this case because the targets of MX and SRV records must
6047 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6048 target that, when qualified, matched something in the local domain. These
6049 two options are now turned off when doing these lookups.
6051 57. It seems that at least some releases of Reiserfs (which does not have the
6052 concept of a fixed number of inodes) returns zero and not -1 for the
6053 number of available inodes. This interacted badly with check_spool_inodes,
6054 which assumed that -1 was the "no such thing" setting. What I have done is
6055 to check that the total number of inodes is greater than zero before doing
6056 the test of how many are available.
6058 58. When a "warn" ACL statement has a log_message modifier, the message is
6059 remembered, and not repeated. This is to avoid a lot of repetition when a
6060 message has many recipients that cause the same warning to be written.
6061 However, Exim was preserving the list of already written lines for an
6062 entire SMTP session, which doesn't seem right. The memory is now reset if a
6063 new message is started.
6065 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6066 debugging output unless log_rewrite was also set.
6068 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6069 of (int)(handle) when we know that handle contains (void *)(-1).
6071 61. The Exim daemon panic-logs an error return when it closes the incoming
6072 connection. However "connection reset by peer" seems to be common, and
6073 isn't really an error worthy of noting specially, so that particular error
6076 62. When Exim is trying to find all the local interfaces, it used to panic and
6077 die if the ioctl to get the interface flags failed. However, it seems that
6078 on at least one OS (Solaris 9) it is possible to have an interface that is
6079 included in the list of interfaces, but for which you get a failure error
6080 for this call. This happens when the interface is not "plumbed" into a
6081 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6082 failure of the "get flags" call assumes that the interface is down.
6084 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6085 makes life easier for people who are doing arithmetic on fields extracted
6086 from dates, where you often get leading zeros that should not be
6087 interpreted as octal.
6089 64. Added qualify_domain to the redirect router, to override the global
6092 65. If a pathologically long header line contained very many addresses (the
6093 report of this problem mentioned 10 000) and each of them was rewritten,
6094 Exim could use up a very large amount of memory. (It kept on making new
6095 copies of the header line as it rewrote, and never released the old ones.)
6096 At the expense of a bit more processing, the header rewriting function has
6097 been changed so that it no longer eats memory in this way.
6099 66. The generation of the Received: header has been moved from the time that a
6100 message starts to be received, to the time that it finishes. The timestamp
6101 in the Received: header should now be very close to that of the <= log
6102 line. There are two side-effects of this change:
6104 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6105 logged header lines no longer include the local Received: line, because
6106 it has not yet been created. The same applies to a copy of the message
6107 that is returned to a non-SMTP sender when a message is rejected.
6109 (b) When a filter file is tested using -bf, no additional Received: header
6110 is added to the test message. After some thought, I decided that this
6113 This change does not affect the value of $received_for. It is still set
6114 after address rewriting, but before local_scan() is called.
6116 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6118 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6119 gave an unhelpful panic error message, and a defer error. I have managed to
6120 change this behaviour so that it now rejects any supplied certificate,
6121 which seems right, as the list of acceptable certificates is empty.
6123 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6124 gave an unhelpful defer error. I have not managed to make this reject any
6125 supplied certificates, but the error message it gives is "no certificate
6126 supplied", which is not helpful.
6128 70. exigrep's output now also includes lines that are not associated with any
6129 message, but which match the given pattern. Implemented by a patch from
6130 Martin Sluka, which also tidied up the Perl a bit.
6132 71. Recipient callout verification, like sender verification, was using <> in
6133 the MAIL FROM command. This isn't really the right thing, since the actual
6134 sender may affect whether the remote host accepts the recipient or not. I
6135 have changed it to use the actual sender in the callout; this means that
6136 the cache record is now keyed on a recipient/sender pair, not just the
6137 recipient address. There doesn't seem to be a real danger of callout loops,
6138 since a callout by the remote host to check the sender would use <>.
6139 [SEE ABOVE: changed after hitting problems.]
6141 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6142 temporary errors. However, in the case of such a code being given after
6143 the end of a data transmission (i.e. after ".") Exim was failing to write
6144 a retry record for the message. (Yes, there was some broken host that was
6145 actually sending 8xx at this point.)
6147 73. An unknown lookup type in a host list could cause Exim to panic-die when
6148 the list was checked. (An example that provoked this was putting <; in the
6149 middle of a list instead of at the start.) If this happened during a DATA
6150 ACL check, a -D file could be left lying around. This kind of configuration
6151 error no longer causes Exim to die; instead it causes a defer error. The
6152 incident is still logged to the main and panic logs.
6154 74. Buglet left over from Exim 3 conversion. The message "too many messages
6155 in one connection" was written to the rejectlog but not the mainlog, except
6156 when address rewriting (yes!) was being logged.
6158 75. Added write_rejectlog option.
6160 76. When a system filter was run not as root (that is, when system_filter_user
6161 was set), the values of the $n variables were not being returned to the
6162 main process; thus, they were not subsequently available in the $sn
6165 77. Added +return_path_on_delivery log selector.
6167 78. A connection timeout was being treated differently from recipients deferred
6168 when testing hosts_max_try with a message that was older than the host's
6169 retry timeout. (The host should not be counted, thus allowing all hosts to
6170 be tried at least once before bouncing.) This may have been the cause of an
6171 occasionally reported bug whereby a message would remain on the queue
6172 longer than the retry timeout, but would be bounced if a delivery was
6173 forced. I say "may" because I never totally pinned down the problem;
6174 setting up timeout/retry tests is difficult. See also the next item.
6176 79. The ultimate address timeout was not being applied to errors that involved
6177 a combination of host plus message (for example, a timeout on a MAIL
6178 command). When an address resolved to a number of possible hosts, and they
6179 were not all tried for each delivery (e.g. because of hosts_max_try), a
6180 message could remain on the queue longer than the retry timeout.
6182 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6185 81. Fixed an obscure SMTP outgoing bug which required at least the following
6186 conditions: (a) there was another message waiting for the same server;
6187 (b) the server returned 5xx to all RCPT commands in the first message so
6188 that the message was not completed; (c) the server dropped the connection
6189 or gave a negative response to the RSET that Exim sends to abort the
6190 transaction. The observed case was a dropped connection after DATA that had
6191 been sent in pipelining mode. That is, the server had advertised PIPELINING
6192 but was not implementing it correctly. The effect of the bug was incorrect
6193 behaviour, such as trying another host, and this could lead to a crash.
6199 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6200 and daemon.c were passed as pointers to ints; they should have been
6201 pointers to socklen_t variables (which are typically unsigned ints).
6203 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6206 3. Fixed a really odd bug that affected only the testing scheme; patching a
6207 certain fixed string in the binary changed the value of another string that
6208 happened to be identical to the end of the original first string.
6210 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6211 name", it returns that address as the IP address. On some operating
6212 systems (e.g. Solaris), it also passes back the IP address string as the
6213 "host name". However, on others (e.g. Linux), it passes back an empty
6214 string. Exim wasn't checking for this, and was changing the host name to an
6215 empty string, assuming it had been canonicalized.
6217 5. Although rare, it is permitted to have more than one PTR record for a given
6218 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6219 all the names associated with an address, because they do in Solaris.
6220 However, it seems that they do not in Linux for data that comes from the
6221 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6222 I found this out when I moved to a new Linux workstation and tried to run
6223 the Exim test suite.
6225 To get round this problem I have changed the code so that it now does its
6226 own call to the DNS to look up PTR records when searching for a host name.
6227 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6228 addresses that are only in /etc/hosts are still found.
6230 This behaviour is, however, controlled by an option called host_lookup_
6231 order, which defaults to "bydns:byaddr". If people want to use the other
6232 order, or indeed, just use one or the other means of lookup, they can
6233 specify it in this variable.
6235 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6236 some operating systems, this comes back from gethostbyaddr() as an empty
6237 string, and this is what Exim used to test for. However, it seems that in
6238 other systems, "." is yielded. Exim now tests for this case too.
6240 7. The values of check_spool_space and check_log_space are now held internally
6241 as a number of kilobytes instead of an absolute number of bytes. If a
6242 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6243 kilobyte. This means that much larger values can be stored.
6245 8. Exim monitor: an attempt to get the action menu when not actually pointing
6246 at a message produces an empty menu entitled "No message selected". This
6247 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6248 no entries in it ("Shell widget menu has zero width and/or height"). So I
6249 have added a single, blank menu entry in this case.
6251 9. Added ${quote_local_part.
6253 10. MIME decoding is now applied to the contents of Subject: header lines when
6256 11. Now that a reference to $sender_host_address automatically causes a reverse
6257 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6258 host lookup before query-style lookups in lists that might use this
6259 variable. This has therefore been abolished, and the "net-" prefix is no
6260 longer necessary for query-style lookups.
6262 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6263 have been a typo for LFLAGS, so it has been changed.
6265 13. The install script calls Exim with "-C /dev/null" in order to find the
6266 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6267 to be output. However, since Exim outputs its version number before the
6268 error, it didn't break the script. It just looked ugly. I fixed this by
6269 always allowing "-C /dev/null" if the caller is root.
6271 14. Ignore overlarge ACL variable number when reading spool file - insurance
6272 against a later release with more variables having written the file.
6274 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6275 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6276 this, as well as the form without the "IPv6" on the front.
6278 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6279 OS/Makefile-Darwin file.
6281 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6282 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6284 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6285 variable. However, some OS use ints for inodes. I've added cast to long int
6286 to get rid of the compiler warning.
6288 19. I had forgotten to lock out "/../" in configuration file names when
6289 ALT_CONFIG_PREFIX was set.
6291 20. Routers used for verification do not need to specify transports. However,
6292 if such a router generated a host list, and callout was configured, Exim
6293 crashed, because it could not find a port number from the (non-existent)
6294 transport. It now assumes port 25 in this circumstance.
6296 21. Added the -t option to exigrep.
6298 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6299 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6300 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6301 them is set, LOOKUP_LSEARCH is forced.
6303 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6305 24. Added sender and host information to the "rejected by local_scan()" log
6306 line; previously there was no indication of these.
6308 25. Added .include_if_exists.
6310 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6311 Linux. It turns out that not all file systems support this. Apparently some
6312 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6313 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6314 not supported on the file descriptor, is now ignored when Exim is trying to
6315 sync a directory. This applies only to Linux.
6317 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6319 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6320 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6323 29. Added support for maildirsize files from supplied patch (modified a bit).
6325 30. The use of :fail: followed by an empty string could lead Exim to respond to
6326 sender verification failures with (e.g.):
6328 550 Verification failed for <xxx>
6329 550 Sender verify failed
6331 where the first response line was missing the '-' that indicates it is not
6332 the final line of the response.
6334 31. The loop for finding the name of the user that called Exim had a hardwired
6335 limit of 10; it now uses the value of finduser_retries, which is used for
6336 all other user lookups.
6338 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6341 33. Exim was neglecting to zero errno before one call of strtol() when
6342 expanding a string and expecting an integer value. On some systems this
6343 resulted in spurious "integer overflow" errors. Also, it was casting the
6344 result into an int without checking.
6346 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6347 did not work. The code looks as if it has *never* worked, though it appears
6348 to have been documented since at least release 1.62. I have made it work.
6350 35. The "timeout_DNS" error in retry rules, also documented since at least
6351 1.62, also never worked. As it isn't clear exactly what this means, and
6352 clearly it isn't a major issue, I have abolished the feature by treating it
6353 as "timeout", and writing a warning to the main and panic logs.
6355 36. The display of retry rules for -brt wasn't always showing the error code
6358 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6359 timeout_connect_A, timeout_connect_MX.
6361 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6362 to the empty sender.
6364 39. The daemon was not analysing the content of -oX till after it had closed
6365 stderr and disconnected from the controlling terminal. This meant that any
6366 syntax errors were only noted on the panic log, and the return code from
6367 the command was 0. By re-arranging the code a little, I've made the
6368 decoding happen first, so such errors now appear on stderr, and the return
6369 code is 1. However, the actual setting up of the sockets still happens in
6370 the disconnected process, so errors there are still only recorded on the
6373 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6374 connections (as happens on some IP stacks) was logged at start up time as
6375 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6376 it from "IPv6 and IPv4", which means that two separate sockets are being
6379 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6380 says whether AF_INET or AF_INET6 was passed as an argument.
6382 42. Exiwhat output was messed up when time zones were included in log
6385 43. Exiwhat now gives more information about the daemon's listening ports,
6386 and whether -tls-on-connect was used.
6388 44. The "port" option of the smtp transport is now expanded.
6390 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6391 silently ignored. Now an error message is written to the main and panic
6394 46. There's a new ACL modifier called "logwrite" which writes to a log file
6395 as soon as it is encountered.
6397 47. Added $local_user_uid and $local_user_gid at routing time.
6399 48. Exim crashed when trying to verify a sender address that was being
6402 49. Exim was recognizing only a space character after ".include". It now also
6403 recognizes a tab character.
6405 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6406 extracting the relevant information from the specification. The man page no
6407 longer contains scrambled data for the -d option, and I've added a section
6408 at the front about calling Exim under different names.
6410 51. Added "extra_headers" argument to the "mail" command in filter files.
6412 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6415 53. Installed eximstats 1.29.
6417 54. Added transport_filter_timeout as a generic transport option.
6419 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6420 Cc: header lines. This was required by RFC 822, but it not required by RFC
6423 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6424 incoming messages that did not have them. Now it does so only if the
6425 message originates locally, that is, if there is no associated remote host
6426 address. When Resent- header lines are present, this applies to the Resent-
6427 lines rather than the non-Resent- lines.
6429 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6430 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6432 58. Messages for configuration errors now include the name of the main
6433 configuration file - useful now that there may be more than one file in a
6434 list (.included file names were always shown).
6436 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6437 for those rare installations that do not start the daemon as root or run it
6438 setuid root. I've cut out the call to initgroups() if the daemon is not
6441 60. The Exim user and group can now be bound into the binary as text strings
6442 that are looked up at the start of Exim's processing.
6444 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6446 62. Added $mailstore_basename variable.
6448 63. Installed patch to sieve.c from Michael Haardt.
6450 64. When Exim failed to open the panic log after failing to open the main log,
6451 the original message it was trying to log was written to stderr and debug
6452 output, but if they were not available (the usual case in production), it
6453 was lost. Now it is written to syslog before the two lines that record the
6454 failures to open the logs.
6456 65. Users' Exim filters run in subprocesses under the user's uid. It is
6457 possible for a "deliver" command or an alias in a "personal" command to
6458 provoke an address rewrite. If logging of address rewriting is configured,
6459 this fails because the process is not running as root or exim. There may be
6460 a better way of dealing with this, but for the moment (because 4.30 needs
6461 to be released), I have disabled address rewrite logging when running a
6462 filter in a non-root, non-exim process.
6468 1. The buildconfig auxiliary program wasn't quoting the value set for
6469 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6470 not defined. This bug was masked in 4.22 by the effect that was fixed in
6473 2. Some messages that were rejected after a message id was allocated were
6474 shown as "incomplete" by exigrep. It no longer does this for messages that
6475 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6477 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6478 have allow_domain_literals set, the ID did not get logged in the <= line.
6479 Domain literals are now always recognized in Message-ID: header lines.
6481 4. The first argument for a ${extract expansion item is the key name or field
6482 number. Leading and trailing spaces in this item were not being ignored,
6483 causing some misleading effects.
6485 5. When deliver_drop_privilege was set, single queue runner processes started
6486 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6487 same command in the process it spins off) were not dropping privilege.
6489 6. When the daemon running as "exim" started a queue runner, it always
6490 re-executed Exim in the spun-off process. This is a waste of effort when
6491 deliver_drop_privilege is set. The new process now just calls the
6492 queue-runner function directly.
6498 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6501 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6502 ignored. Though the use of -oP was forcing the writing of a pid file, it
6503 was always written to the default place.
6505 3. If the message "no IP address found for host xxxx" is generated during
6506 incoming verification, it is now followed by identification of the incoming
6507 connection (so you can more easily find what provoked it).
6509 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6511 5. Added some features to "harden" Exim a bit more against certain attacks:
6513 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6514 be put in Local/Makefile. This is like the never_users runtime option,
6515 but it cannot be overridden. The default setting is "root".
6517 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6518 prefix string with which any file named in a -C command line option
6521 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6522 is retained for -C and -D only if the caller of Exim is root. Without
6523 it, the exim user may also use -C and -D and retain privilege.
6525 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6526 command line option is disabled.
6528 6. Macro names set by the -D option must start with an upper case letter, just
6529 like macro names defined in the configuration file.
6531 7. Added "dereference=" facility to LDAP.
6533 8. Two instances of the typo "uknown" in the source files are fixed.
6535 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6536 the Configure-Makefile script screwed up while processing it.
6538 10. Incorporated PCRE 4.4.
6540 11. The SMTP synchronization check was not operating right at the start of an
6541 SMTP session. For example, it could not catch a HELO sent before the client
6542 waited for the greeting. There is now a check for outstanding input at the
6543 point when the greeting is written. Because of the duplex, asynchronous
6544 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6545 way, but not yet received, when the check is performed.
6547 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6548 on TCP/IP sockets, because this apparently causes some broken clients to
6551 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6552 unchanged) from the Cygwin maintainer.
6554 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6555 was supported instead of testing for mbx. Effectively a typo.
6557 15. The spa authenticator server code was not checking that the input it
6558 received was valid base64.
6560 16. The debug output line for the "set" modifier in ACLs was not showing the
6561 name of the variable that was being set.
6563 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6565 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6566 lookup on its own. Something else was needed to trigger the lookup. For
6567 example, a match in host_lookup or the need for a host name in a host list.
6568 Now, if $sender_host_name is referenced and the host name has not yet been
6569 looked up, a lookup is performed. If the lookup fails, the variable remains
6570 empty, and $host_lookup_failed is set to "1".
6572 19. Added "eqi" as a case-independent comparison operator.
6574 20. The saslauthd authentication condition could segfault if neither service
6575 nor realm was specified.
6577 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6578 error message that was logged was misleading, and incoming SMTP
6579 connections were dropped. The message is now more accurate, and temporary
6580 errors are given to SMTP connections.
6582 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6583 (except RSET) with a 421 error, until QUIT is received. However, it was
6584 failing to send a response to QUIT.
6586 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6587 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6588 ACL is now run after the helo_try_verify_hosts code.
6590 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6591 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6592 case-independent, so other case variants are also recognized). Apparently
6593 some systems use these upper case variants.
6595 25. If more than two messages were waiting for the same host, and a transport
6596 filter was specified for the transport, Exim sent two messages over the
6597 same TCP/IP connection, and then failed with "socket operation on non-
6598 socket" when it tried to send the third.
6600 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6602 27. The extern definition of crypt16() in expand.c was not being excluded when
6603 the OS had its own crypt16() function.
6605 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6606 as a preferred synonym for return_size_limit, both as an option and as an
6609 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6611 30. Changed the default configuration ACL to relax the local part checking rule
6612 for addresses that are not in any local domains. For these addresses,
6613 slashes and pipe symbols are allowed within local parts, but the sequence
6614 /../ is explicitly forbidden.
6616 31. SPA server authentication was not clearing the challenge buffer before
6619 32. log_message in a "warn" ACL statement was writing to the reject log as
6620 well as to the main log, which contradicts the documentation and doesn't
6621 seem right (because no rejection is happening). So I have stopped it.
6623 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6624 However, I am unable to do any testing of this.
6626 34. Fixed an infelicity in the appendfile transport. When checking directories
6627 for a mailbox, to see if any needed to be created, it was accidentally
6628 using path names with one or more superfluous leading slashes; tracing
6629 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6631 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6632 contents are added to the log line that is written for every discarded
6633 recipient. (Previously a log_message setting was ignored.)
6635 36. The ${quote: operator now quotes the string if it is empty.
6637 37. The install script runs exim in order to find its version number. If for
6638 some reason other than non-existence or emptiness, which it checks, it
6639 could not run './exim', it was installing it with an empty version number,
6640 i.e. as "exim-". This error state is now caught, and the installation is
6643 38. An argument was missing from the function that creates an error message
6644 when Exim fails to connect to the socket for saslauthd authentication.
6645 This could cause Exim to crash, or give a corrupted message.
6647 39. Added isip, isip4, and isip6 to ${if conditions.
6649 40. The ACL variables $acl_xx are now saved with the message, and can be
6650 accessed later in routers, transports, and filters.
6652 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6653 strings in the file are not string-expanded.
6655 42. If a MAIL command specified a SIZE value that was too large to fit into an
6656 int variable, the check against message_size_limit failed. Such values are
6657 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6658 day this will have to be increased, but I don't think I want to be around
6659 when emails are that large.
6666 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6667 iconv() is not standard in FreeBSD.
6669 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6670 IPv6 enabled. The observed symptom was a segmentation fault on return from
6671 the function os_common_find_running_interfaces() in src/os.c.
6673 3. In the check_special_case() function in daemon.c I had used "errno" as an
6674 argument name, which causes warnings on some systems. This was basically a
6675 typo, since it was named "eno" in the comments!
6677 4. The code that waits for the clock to tick (at a resolution of some fraction
6678 of a second) so as to ensure message-id uniqueness was always waiting for
6679 at least one whole tick, when it could have waited for less. [This is
6680 almost certainly not relevant at current processor speeds, where it is
6681 unlikely to ever wait at all. But we try to future-proof.]
6683 5. The function that sleeps for a time interval that includes fractions of a
6684 second contained a race. It did not block SIGALRM between setting the
6685 timer, and suspending (a couple of lines later). If the interval was short
6686 and the sigsuspend() was delayed until after it had expired, the suspension
6687 never ended. On busy systems this could lead to processes getting stuck for
6690 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6691 process, before it forks any delivery processes. The open lookup caching
6692 mechanism meant that the open file or database connection was passed into
6693 the delivery process. The problem was that delivery processes always tidy
6694 up cached lookup data. This could cause a problem for the next delivery
6695 process started by the queue runner, because the external queue runner
6696 process does not know about the closure. So the next delivery process
6697 still has data in the lookup cache. In the case of a file lookup, there was
6698 no problem because closing a file descriptor in a subprocess doesn't affect
6699 the parent. However, if the lookup was caching a connection to a database,
6700 the connection was closed, and the second delivery process was likely to
6701 see errors such as "PGSQL: query failed: server closed the connection
6702 unexpectedly". The problem has been fixed by closing all cached lookups
6703 in a queue runner before running a delivery process.
6705 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6706 seem to have the "const" qualifier which it has on other OS. I've
6709 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6710 *of the same type* (client or server) with the same public name that an
6711 error should be diagnosed.
6713 9. When Exim looked up a host name for an IP address, but failed to find the
6714 original IP address when looking up the host name (a safety check), it
6715 output the message "<ip address> does not match any IP for NULL", which was
6716 confusing, to say the least. The bug was that the host name should have
6717 appeared instead of "NULL".
6719 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6720 user that is built into the binary, and the -C or -D options is used, root
6721 privilege is dropped before the configuration file is read. In addition,
6722 logging is switched to stderr instead of the normal log files. If the
6723 configuration then re-defines the Exim user, the unprivileged environment
6724 is probably not what is expected, so Exim logs a panic warning message (but
6727 However, if deliver_drop_privilege is set, the unprivileged state may well
6728 be exactly what is intended, so the warning has been cut out in that case,
6729 and Exim is allowed to try to write to its normal log files.
6735 1. smtp_return_error_details was not giving details for temporary sender
6736 or receiver verification errors.
6738 2. Diagnose a configuration error if two authenticators have the same public
6741 3. Exim used not to create the message log file for a message until the first
6742 delivery attempt. This could be confusing when incoming messages were held
6743 for policy or load reasons. The message log file is now created at the time
6744 the message is received, and an initial "Received" line is written to it.
6746 4. The automatically generated man page for command line options had a minor
6747 bug that caused no ill effects; however, a more serious problem was that
6748 the procedure for building the man page automatically didn't always
6749 operate. Consequently, release 4.20 contains an out-of-date version. This
6750 shouldn't happen again.
6752 5. When building Exim with embedded Perl support, the script that builds the
6753 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6754 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6756 6. The freeze_tell option was not being used for messages that were frozen on
6757 arrival, either by an ACL or by local_scan().
6759 7. Added the smtp_incomplete_transaction log selector.
6761 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6762 was accepting AUTH without a new EHLO.
6764 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6765 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6768 10. Logging of TCP/IP connections (when configured) now happens in the main
6769 daemon process instead of the child process, so that the TCP/IP connection
6770 count is more accurate (but it can never be perfect).
6772 11. The use of "drop" in a nested ACL was not being handled correctly in the
6773 outer ACL. Now, if condition failure induced by the nested "drop" causes
6774 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6775 or "require"), the connection is dropped.
6777 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6778 that yield "discard" can now be used with an "accept" or a "discard" verb,
6779 but an error is generated for any others (because I can't see a useful way
6780 to define what should happen).
6782 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6783 are now processed in the same way as lines in the Exim configuration file.
6784 In particular, continuation lines are supported.
6786 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6788 15. Added -ti meaning -t -i.
6790 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6791 domains, and warn by logging if others are found.
6793 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6794 returned from GIFCONF when Exim is trying to find the list of interfaces on
6795 a host. The code in os.c has been modified to copy each ifreq to an aligned
6796 structure in all cases.
6798 Also, in some cases, the returned ifreq's were being copied to a 'struct
6799 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6800 means the last couple of bytes of an IPv6 address could be chopped if the
6801 ifreq contained only a normal sockaddr (14 bytes storage).
6803 18. Named domain lists were not supported in the hosts_treat_as_local option.
6804 An entry such as +xxxx was not recognized, and was treated as a literal
6807 19. Ensure that header lines added by a DATA ACL are included in the reject log
6808 if the ACL subsequently rejects the message.
6810 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6811 MD5 (which is deprecated).
6813 21. When testing a filter file using -bf, Exim was writing a message when it
6814 took the sender from a "From " line in the message, but it was not doing so
6815 when it took $return_path from a Return-Path: header line. It now does.
6817 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6818 with a valid header line field name (a series of printing characters
6819 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6821 23. Changed "disc" in the source to "disk" to conform to the documentation and
6822 the book and for uniformity.
6824 24. Ignore Sendmail's -Ooption=value command line item.
6826 25. When execve() failed while trying to run a command in a pipe transport,
6827 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6828 could be confused with a return value of 69 from the command itself. This
6829 has been changed to 127, the value the shell returns if it is asked to run
6830 a non-existent command. The wording for the related log line suggests a
6831 non-existent command as the problem.
6833 26. If received_header_text expands to an empty string, do not add a Received:
6834 header line to the message. (Well, it adds a token one on the spool, but
6835 marks it "old" so that it doesn't get used or transmitted.)
6837 27. Installed eximstats 1.28 (addition of -nt option).
6839 28. There was no check for failure on the call to getsockname() in the daemon
6840 code. This can fail if there is a shortage of resources on the system, with
6841 ENOMEM, for example. A temporary error is now given on failure.
6843 29. Contrary to the C standard, it seems that in some environments, the
6844 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6845 program. Exim now does this explicitly; it affects the formatting of
6846 timestamps using strftime().
6848 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6849 complaints. I've now initialized all the variables, to avoid this.
6851 32. Header lines added by a system filter were not being "seen" during
6852 transport-time rewrites.
6854 33. The info_callback() function passed to OpenSSL is set up with type void
6855 (*)(SSL *, int, int), as described somewhere. However, when calling the
6856 function (actually a macro) that sets it up, the type void(*)() is
6857 expected. I've put in a cast to prevent warnings from picky compilers.
6859 34. If a DNS black list lookup found a CNAME record, but there were no A
6860 records associated with the domain it pointed at, Exim crashed.
6862 35. If a DNS black list lookup returned more than one A record, Exim ignored
6863 all but the first. It now scans all returned addresses if a particular IP
6864 value is being sought. In this situation, the contents of the
6865 $dnslist_value variable are a list of all the addresses, separated by a
6868 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6869 to accept a host name and all its aliases if the forward lookup for any of
6870 them yielded the IP address of the incoming connection. Now it accepts only
6871 those names whose forward lookup yields the correct IP address. Any other
6872 names are discarded. This closes a loophole whereby a rogue DNS
6873 administrator could create reverse DNS records to break through a
6874 wildcarded host restriction in an ACL.
6876 37. If a user filter or a system filter that ran in a subprocess used any of
6877 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6878 the wrong values were passed to the pipe command ($thisaddress had the
6879 value of $0, $0 had the value of $1, etc). This bug was introduced by
6880 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6882 38. Improved the line breaking for long SMTP error messages from ACLs.
6883 Previously, if there was no break point between 40 and 75 characters, Exim
6884 left the rest of the message alone. Two changes have been made: (a) I've
6885 reduced the minimum length to 35 characters; (b) if it can't find a break
6886 point between 35 and 75 characters, it looks ahead and uses the first one
6887 that it finds. This may give the occasional overlong line, but at least the
6888 remaining text gets split now.
6890 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6891 file descriptors might be low, and that setting 1000 would always raise it.
6892 It turns out that in some environments, the limit is already over 1000 and
6893 that lowering it causes trouble. So now Exim takes care not to decrease it.
6895 40. When delivering a message, the value of $return_path is set to $sender_
6896 address at the start of routing (routers may change the value). By an
6897 oversight, this default was not being set up when an address was tested by
6898 -bt or -bv, which affected the outcome if any router or filter referred to
6901 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6902 log only when "message" or "log_message" are set. However, if one of the
6903 conditions was an address verification, or a call to a nested ACL, the
6904 messages generated by the underlying test were being passed through. This
6905 no longer happens. The underlying message is available in $acl_verify_
6906 message for both "message" and "log_message" expansions, so it can be
6907 passed through if needed.
6909 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6910 new expansion $bh_ to give the encoded byte string without charset
6911 translation. Translation happens only if iconv() is available; HAVE_ICONV
6912 indicates this at build time. HEADERS_CHARSET gives the charset to
6913 translate to; headers_charset can change it in the configuration, and
6914 "headers charset" can change it in an individual filter file.
6916 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6917 that creates RFC 2047 encoded "words" labels them as that charset instead
6918 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6919 expansion operator; (ii) when Exim creates a From: line for a local
6920 message; (iii) when a header line is rewritten to include a "phrase" part.
6922 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6923 buggy, causing it to skip the first lines of messages whose message ID
6924 ended in 'D'. This would not have bitten before Exim release 4.14, because
6925 message IDs were unlikely to end in 'D' before then. The effect was to have
6926 incorrect size information for certain domains.
6928 45. #include "config.h" was missing at the start of the crypt16.c module. This
6929 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6932 46. If there was a timeout during a "random" callout check, Exim treated it as
6933 a failure of the random address, and carried on sending RSET and the real
6934 address. If the delay was just some slowness somewhere, the response to the
6935 original RCPT would be taken as a response to RSET and so on, causing
6936 mayhem of various kinds.
6938 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6939 when I implemented it. It didn't allow for the fact that some option values
6940 may legitimately be negative (e.g. size_addition), and it didn't even do
6941 the right test for positive values.
6943 48. Domain names in DNS records are case-independent. Exim always looks them up
6944 in lower case. Some resolvers return domain names in exactly the case they
6945 appear in the zone file, that is, they may contain uppercase letters. Not
6946 all resolvers do this - some return always lower case. Exim was treating a
6947 change of case by a resolver as a change of domain, similar to a widening
6948 of a domain abbreviation. This triggered its re-routing code and so it was
6949 trying to route what was effectively the same domain again. This normally
6950 caused routing to fail (because the router wouldn't handle the domain
6951 twice). Now Exim checks for this case specially, and just changes the
6952 casing of the domain that it ultimately uses when it transmits the message
6955 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6958 50. If a filter generated a file delivery with a non-absolute name (possible if
6959 no home directory exists for the router), the forbid_file option was not
6962 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6963 the existing equality matching.
6965 52. Exim was using ints instead of ino_t variables in some places where it was
6966 dealing with inode numbers.
6968 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6969 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6970 called TMPDIR, and if it finds it is different, it changes its value.
6972 54. The smtp_printf() function is now made available to local_scan() so
6973 additional output lines can be written before returning. There is also an
6974 smtp_fflush() function to enable the detection of a dropped connection.
6975 The variables smtp_input and smtp_batched_input are exported to
6978 55. Changed the default runtime configuration: the message "Unknown user"
6979 has been removed from the ACL, and instead placed on the localuser router,
6980 using the cannot_route_message feature. This means that any verification
6981 failures that generate their own messages won't get overridden. Similarly,
6982 the "Unrouteable address" message that was in the ACL for unverifiable
6983 relay addresses has also been removed.
6985 56. Added hosts_avoid_esmtp to the smtp transport.
6987 57. The exicyclog script was not checking for the esoteric option
6988 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6989 will work only if exicyclog is run under the appropriate euid.
6991 58. Following a discussion on the list, the rules by which Exim recognises line
6992 endings on incoming messages have been changed. The -dropcr and drop_cr
6993 options are now no-ops, retained only for backwards compatibility. The
6994 following line terminators are recognized: LF CRLF CR. However, special
6995 processing applies to CR:
6997 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6998 nor a local message in the state where . is a terminator.
7000 (ii) If a bare CR is encountered in a header line, an extra space is added
7001 after the line terminator so as not to end the header. The reasoning
7002 behind this is that bare CRs in header lines are most likely either
7003 to be mistakes, or people trying to play silly games.
7005 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7006 was being incorrectly given as 18 bytes larger than it should have been.
7007 This is a VOB (very old bug).
7009 60. This may never have affected anything current, but just in case it has:
7010 When the local host is found other than at the start of a list of hosts,
7011 the local host, those with the same MX, and any that follow, are discarded.
7012 When the list in question was part of a longer list of hosts, the following
7013 hosts (not currently being processed) were also being discarded. This no
7014 longer happens. I'm not sure if this situation could ever has previously
7017 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7020 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7021 header. This is something that is recommended in a new Internet Draft, and
7022 is something that is documented as being done by Sendmail. There are two
7023 possible values. For messages generated by the autoreply transport, Exim
7026 Auto-Submitted: auto-replied
7028 whereas for all other generated messages (e.g. bounces) it adds
7030 Auto-Submitted: auto-generated
7032 63. The "personal" condition in filters now includes a test for the
7033 Auto-Submitted: header. If it contains the string "auto-" the message it
7034 not considered personal.
7036 64. Added rcpt_include_affixes as a generic transport option.
7038 65. Added queue_only_override (default true).
7040 66. Added the syslog_duplication option.
7042 67. If what should have been the first header line of a message consisted of
7043 a space followed by a colon, Exim was mis-interpreting it as a header line.
7044 It isn't of course - it is syntactically invalid and should therefore be
7045 treated as the start of the message body. The misbehaviour could have
7046 caused a number of strange effects, including loss of data in subsequent
7047 header lines, and spool format errors.
7049 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7050 client host had authenticated. This control can now be exercised by an ACL
7051 for more flexibility.
7053 69. By default, callouts do not happen when testing with -bh. There is now a
7054 variant, -bhc, which does actually run the callout code, including
7055 consulting and updating the callout cache.
7057 70. Added support for saslauthd authentication, courtesy of Alexander
7060 71. If statvfs() failed on the spool or log directories while checking their
7061 size for availability, Exim confusingly gave the error "space shortage".
7062 Furthermore, in debugging mode it crashed with a floating point exception.
7063 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7064 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7065 serious problem, Exim now writes to the main and panic logs when this
7066 happens, with details of the failure. It then refuses to accept the
7067 incoming message, giving the message "spool directory problem" or "log
7068 directory problem" with a 421 code for SMTP messages.
7070 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7071 0, 1, and 2 exist, because some OS complain for execs without them (see
7072 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7073 descriptors. However, the code omitted to check that the open succeeded,
7074 causing mysterious errors if for some reason the permissions on /dev/null
7075 got screwed. Now Exim writes a message to the main and panic logs, and
7076 bombs out if it can't open /dev/null.
7078 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7079 interact so that it is all more flexible. It is supposed to remain
7080 backwards compatible. Also added extra_local_interfaces.
7082 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7083 to bomb out with an assertion failure - to the client this appears as a
7084 connection drop. This problem occurs in the part of the code that was taken
7085 from the Samba project. Fortunately, the assertion is in a very simple
7086 function, so I have fixed this by reproducing the function inline in the
7087 one place where it is called, and arranging for authentication to fail
7088 instead of killing the process with assert().
7090 75. The SPA client code was not working when the server requested OEM rather
7091 than Unicode encoding.
7093 76. Added code to make require_files with a specific uid setting more usable in
7094 the case where statting the file as root fails - usually a non-root-mounted
7095 NFS file system. When this happens and the failure is EACCES, Exim now
7096 forks a subprocess and does the per-uid checking as the relevant uid.
7098 77. Added process_log_path.
7100 78. If log_file_path was not explicitly set, a setting of check_log_space or
7101 check_log_inodes was ignored.
7103 79. If a space check for the spool or log partitions fails, the incident is now
7104 logged. Of course, in the latter case the data may get lost...
7106 80. Added the %p formatting code to string_format() so that it can be used to
7107 print addresses in debug_print(). Adjusted all the address printing in the
7108 debugging in store.c to use %p rather than %d.
7110 81. There was a concern that a line of code in smtp_in.c could overflow a
7111 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7112 initially expressed, the concern was not well-founded, because trailing
7113 spaces are removed early. However, if the trailing spaces were followed by
7114 a NULL, they did not get removed, so the overflow was possible. Two fixes
7117 (a) I re-wrote the offending code in a cleaner fashion.
7118 (b) If an incoming SMTP command contains a NULL character, it is rejected
7121 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7122 runs initgroups(), so that if the Exim user is in any additional groups,
7123 they will be used during message reception.
7129 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob