1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
12 non-signal-safe functions being used.
14 JH/03 Bug 2269: When presented with a received message having a stupidly large
15 number of DKIM-Signature headers, disable DKIM verification to avoid
16 a resource-consumption attack. The limit is set at twenty.
18 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
19 files in the spool were present and unlocked. A queue-runner could spot
20 them, resulting in a duplicate delivery. Fix that by doing the unlock
21 after the unlink. Investigation by Tim Stewart.
27 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
28 When redis_servers is set to a list of > 1 element, and the Redis servers
29 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
30 case of MOVED into a DEFER case instead, thus moving the query onto the
31 next server in the list. For a cluster of N elements, all N servers must
32 be defined in redis_servers.
34 GF/02 Catch and remove uninitialized value warning in exiqsumm
35 Check for existence of @ARGV before looking at $ARGV[0]
37 JH/01 Replace the store_release() internal interface with store_newblock(),
38 which internalises the check required to safely use the old one, plus
39 the allocate and data copy operations duplicated in both (!) of the
42 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
43 modifier. This matches the restriction on the commandline.
45 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
46 Previously only the last row was returned.
48 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
49 we assumed that tags in the header were well-formed, and parsed the
50 element content after inspecting only the first char of the tag.
51 Assumptions at that stage could crash the receive process on malformed
54 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
55 While running the DKIM ACL we operate on the Permanent memory pool so that
56 variables created with "set" persist to the DATA ACL. Also (at any time)
57 DNS lookups that fail create cache records using the Permanent pool. But
58 expansions release any allocations made on the current pool - so a dnsdb
59 lookup expansion done in the DKIM ACL releases the memory used for the
60 DNS negative-cache, and bad things result. Solution is to switch to the
61 Main pool for expansions.
62 While we're in that code, add checks on the DNS cache during store_reset,
63 active in the testsuite.
64 Problem spotted, and debugging aided, by Wolfgang Breyha.
66 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
67 When none of the hosts presented to a transport match an already-open
68 connection, close it and proceed with the list. Previously we would
69 queue the message. Spotted by Lena with Yahoo, probably involving
72 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
73 Previously a spurious "250 OK id=" response was appended to the proper
76 JH/08 The "support for" informational output now, which built with Content
77 Scanning support, has a line for the malware scanner interfaces compiled
78 in. Interface can be individually included or not at build time.
80 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
81 by the template makefile "src/EDITME". The "STREAM" support for an older
82 ClamAV interface method is removed.
84 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
85 rows affected is given instead).
87 JH/11 The runtime Berkeley DB library version is now additionally output by
88 "exim -d -bV". Previously only the compile-time version was shown.
90 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
91 SMTP connection. Previously, when one had more receipients than the
92 first, an abortive onward connection was made. Move to full support for
93 multiple onward connections in sequence, handling cutthrough connection
94 for all multi-message initiating connections.
96 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
97 routers. Previously, a multi-recipient message would fail to match the
98 onward-connection opened for the first recipient, and cause its closure.
100 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
101 a timeout on read on a GnuTLS initiating connection, resulting in the
102 initiating connection being dropped. This mattered most when the callout
103 was marked defer_ok. Fix to keep the two timeout-detection methods
106 JH/15 Relax results from ACL control request to enable cutthrough, in
107 unsupported situations, from error to silently (except under debug)
108 ignoring. This covers use with PRDR, frozen messages, queue-only and
111 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
113 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
114 metadata, resulting in a crash in free().
116 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
117 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
118 Broken also in d185889f4, with init system revamp.
120 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
121 Previously we abruptly closed the connection after reading a malware-
122 found indication; now we go on to read the "scan ok" response line,
125 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
126 ACL. Previously, a crash would result.
128 JH/19 Speed up macro lookups during configuration file read, by skipping non-
129 macro text after a replacement (previously it was only once per line) and
130 by skipping builtin macros when searching for an uppercase lead character.
132 JH/20 DANE support moved from Experimental to mainline. The Makefile control
133 for the build is renamed.
135 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
136 was allocated for every new TLS startup, meaning one per message. Fix
137 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
139 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
140 reported the original. Fix to report (as far as possible) the ACL
141 result replacing the original.
143 JH/23 Fix memory leak during multi-message connections using STARTTLS under
144 OpenSSL. Certificate information is loaded for every new TLS startup,
145 and the resources needed to be freed.
147 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
149 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
152 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
153 DATA response info to the (existing) per-recipient response info for
154 the "C=" log element. It can have useful tracking info from the
155 destination system. Patch from Simon Arlott.
157 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
158 length value. Previously this would segfault.
160 HS/02 Support Avast multiline protoocol, this allows passing flags to
161 newer versions of the scanner.
163 JH/28 Ensure that variables possibly set during message acceptance are marked
164 dead before release of memory in the daemon loop. This stops complaints
165 about them when the debug_store option is enabled. Discovered specifically
166 for sender_rate_period, but applies to a whole set of variables.
167 Do the same for the queue-runner and queue-list loops, for variables set
168 from spool message files. Do the same for the SMTP per-message loop, for
169 certain variables indirectly set in ACL operations.
171 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
172 as a multi-recipient message from a mailinglist manager). The coding had
173 an arbitrary cutoff number of characters while checking for more input;
174 enforced by writing a NUL into the buffer. This corrupted long / fast
175 input. The problem was exposed more widely when more pipelineing of SMTP
176 responses was introduced, and one Exim system was feeding another.
177 The symptom is log complaints of SMTP syntax error (NUL chars) on the
178 receiving system, and refused recipients seen by the sending system
179 (propating to people being dropped from mailing lists).
180 Discovered and pinpointed by David Carter.
182 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
183 replaced by the ${authresults } expansion.
185 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
187 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
188 allows proper process termination in container environments.
190 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
191 Previously the "final dot" had a newline after it; ensure it is CR,LF.
193 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
194 and "err_perm", deprecated since 4.83 when the RFC-defined words
195 "temperror" and "permerror" were introduced.
197 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
198 transport-filters or DKIM-signing. The restriction was lost in the
199 consolidation of verify-callout and delivery SMTP handling.
200 Extend the restriction to also cover ARC-signing.
202 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
203 in defer=pass mode supply a 450 to the initiator. Previously the message
206 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
207 tls_require_ciphers is used as before.
209 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
210 "pass_unscanned". Only tmpfails from the scanner are written to
211 the paniclog, as they may require admin intervention (permission
212 denied, license issues). Other scanner errors (like decompression
213 bombs) do not cause a paniclog entry.
215 JH/36 Fix reinitialisation of DKIM logging variable between messages.
216 Previously it was possible to log spurious information in receive log
219 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
220 triggered odd behaviour from Outlook Express clients.
222 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
225 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
226 since the IETF WG has not yet settled on that versus the original
227 "bare" representation.
229 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
230 Previously the millisecond value corrupted the output.
231 Fix also for syslog_pid=no and log_selector +pid, for which the pid
232 corrupted the output.
238 JH/01 Rework error string handling in TLS interface so that the caller in
239 more cases is responsible for logging. This permits library-sourced
240 string to be attached to addresses during delivery, and collapses
241 pairs of long lines into single ones.
243 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
244 during configuration. Wildcards are allowed and expanded.
246 JH/02 Rework error string handling in DKIM to pass more info back to callers.
247 This permits better logging.
249 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
250 do not close it down and have the child transport start it up again on
251 the passed-on TCP connection. Instead, proxy the child (and any
252 subsequent ones) for TLS via a unix-domain socket channel. Logging is
253 affected: the continued delivery log lines do not have any DNSSEC, TLS
254 Certificate or OCSP information. TLS cipher information is still logged.
256 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
257 identical IP addresses on different listening ports. Will also affect
260 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
261 add noisy ifdef guards to special-case this sillyness.
262 Patch from Bernd Kuhls.
264 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
265 than 255 are no longer allowed.
267 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
268 Disable the session-cache too, which might reduce our load. Since we
269 currrectly use a new context for every connection, both as server and
270 client, there is no benefit for these.
271 GnuTLS appears to not support tickets server-side by default (we don't
272 call gnutls_session_ticket_enable_server()) but client side is enabled
273 by default on recent versions (3.1.3 +) unless the PFS priority string
276 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
277 <https://reproducible-builds.org/specs/source-date-epoch/>.
279 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
280 the check for any unsuccessful recipients did not notice the limit, and
281 erroneously found still-pending ones.
283 JH/08 Pipeline CHUNKING command and data together, on kernels that support
284 MSG_MORE. Only in-clear (not on TLS connections).
286 JH/09 Avoid using a temporary file during transport using dkim. Unless a
287 transport-filter is involved we can buffer the headers in memory for
288 creating the signature, and read the spool data file once for the
289 signature and again for transmission.
291 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
292 4.77 as the kernel support then wasn't solid, having issues in 64bit
293 mode. Now, it's been long enough. Add support for FreeBSD also.
295 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
296 case where the routing stage had gathered several addresses to send to
297 a host before calling the transport for the first, we previously failed
298 to close down TLS in the old transport process before passing the TCP
299 connection to the new process. The new one sent a STARTTLS command
300 which naturally failed, giving a failed delivery and bloating the retry
301 database. Investigation and fix prototype from Wolfgang Breyha.
303 JH/12 Fix check on SMTP command input synchronisation. Previously there were
304 false-negatives in the check that the sender had not preempted a response
305 or prompt from Exim (running as a server), due to that code's lack of
306 awareness of the SMTP input buffering.
308 PP/04 Add commandline_checks_require_admin option.
309 Exim drops privileges sanely, various checks such as -be aren't a
310 security problem, as long as you trust local users with access to their
311 own account. When invoked by services which pass untrusted data to
312 Exim, this might be an issue. Set this option in main configuration
313 AND make fixes to the calling application, such as using `--` to stop
316 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
317 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
318 responses to those, into a single TLS record each way (this usually means
319 a single packet). As a side issue, smtp_enforce_sync now works on TLS
322 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
323 affects you only if you're dancing at the edge of the param size limits.
324 If you are, and this message makes sense to you, then: raise the
325 configured limit or use OpenSSL 1.1. Nothing we can do for older
328 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
329 cmdline element to get the documented default one. Previously it was
332 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
333 are unsuable for non-message-specific reasons - eg. connection timeout,
334 banner-time rejection.
336 JH/16 Fix logging of delivery remote port, when specified by router, under
339 PP/06 Repair manualroute's ability to take options in any order, even if one
340 is the name of a transport.
343 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
345 JH/17 Change the list-building routines interface to use the expanding-string
346 triplet model, for better allocation and copying behaviour.
348 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
349 Previously it was constructed the first time a possibly-matching string
350 was met in the configuration file input during startup; now it is done
353 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
354 compatible one, to avoid the (poorly documented) possibility of a config
355 file in the working directory redirecting the DB files, possibly correpting
356 some existing file. CVE-2017-10140 assigned for BDB.
358 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
359 cache-hot. Previously, although the result was properly cached, the
360 initial verify call returned a defer.
362 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
363 the main verify for receipient in uncached-mode.
365 JH/22 Retire historical build files to an "unsupported" subdir. These are
366 defined as "ones for which we have no current evidence of testing".
368 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
369 if present. Previously it was ignored.
371 JH/24 Start using specified-initialisers in C structure init coding. This is
372 a C99 feature (it's 2017, so now considered safe).
374 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
375 if was a fixed-sized field and bitmask ops via macros; it is now more
378 PP/07 GitHub PR 56: Apply MariaDB build fix.
379 Patch provided by Jaroslav Škarvada.
381 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
382 during Coverity cleanups [4.87 JH/47]
383 Diagnosis and fix provided by Michael Fischer v. Mollard.
385 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
386 the right size to place the terminating semicolon on its own folded
387 line, the header hash was calculated to an incorrect value thanks to
388 the (relaxed) space the fold became.
390 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
391 and confused the parent.
393 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
394 which could crash as a result. This could lead to undeliverable messages.
396 JH/28 Logging: "next input sent too soon" now shows where input was truncated
399 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
400 matters on fast-turnover and PID-randomising systems, which were getting
401 out-of-order delivery.
403 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
404 a possibly-overlapping copy. The symptom was that "Remote host closed
405 connection in response to HELO" was logged instead of the actual 4xx
408 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
409 Previously only that bufferd was discarded, resulting in SYMTP command
412 JH/32 DKIM: when a message has multiple signatures matching an identity given
413 in dkim_verify_signers, run the dkim acl once for each. Previously only
414 one run was done. Bug 2189.
416 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
417 "panic the current process" to "deliberately defer". The panic log is
418 still written with the problem list name; the mail and reject logs now
419 get a temp-reject line for the message that was being handled, saying
420 something like "domains check lookup or other defer". The SMTP 451
421 message is still "Temporary local problem".
423 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
424 A crafted sequence of BDAT commands could result in in-use memory beeing
425 freed. CVE-2017-16943.
427 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
428 from SMTP input. Previously it was always done; now only done for DATA
429 and not BDAT commands. CVE-2017-16944.
431 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
432 to the message (such as an overlong header line). Previously this was
433 not done and we did not exit BDAT mode. Followon from the previous item
434 though a different problem.
440 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
441 than -2003 did; needs libidn2 in addition to libidn.
443 JH/02 The path option on a pipe transport is now expanded before use.
445 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
446 Patch provided by "Björn", documentation fix added too.
448 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
449 missing a wire-to-host endian conversion.
451 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
452 close after a BDAT command line could be taken as a following command,
453 giving a synch failure. Fix by only checking for synch immediately
454 before acknowledging the chunk.
456 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
457 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
458 macro. Patches provided by Josh Soref.
460 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
461 Previously we did not; the RFC seems ambiguous and VRFY is not listed
462 by IANA as a service extension. However, John Klensin suggests that we
465 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
466 the dkim code may be unix-mode line endings rather than smtp wire-format
467 CRLF, so prepend a CR to any bare LF.
469 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
470 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
472 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
473 the first were themselves being wrongly included in the feed into dkim
474 processing; with most chunk sizes in use this resulted in an incorrect
475 body hash calculated value.
477 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
478 DKIM signature block, for verification. Although advised against by
479 standards it is specifically not ruled illegal.
481 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
483 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
484 missing a body hash (the bh= tag).
486 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
487 It seems that HAProxy sends the Proxy Protocol information in clear and
488 only then does a TLS startup, so do the same.
490 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
491 TCP connections (such as for Spamd) unless the daemon successfully set
492 Fast Open mode on its listening sockets. This fixes breakage seen on
493 too-old kernels or those not configured for Fast Open, at the cost of
494 requiring both directions being enabled for TFO, and TFO never being used
495 by non-daemon-related Exim processes.
497 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
498 endings, at least on the first header line. Try to canonify any that get
499 past that check, despite the cost.
501 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
502 now limited to an arbitrary five deep, while parsing addresses with the
503 strip_excess_angle_brackets option enabled.
505 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
506 instead leave the unprompted TLS handshake in socket buffer for the
507 TLS library to consume.
509 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
511 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
513 JH/16 Drop variables when they go out of scope. Memory management drops a whole
514 region in one operation, for speed, and this leaves assigned pointers
515 dangling. Add checks run only under the testsuite which checks all
516 variables at a store-reset and panics on a dangling pointer; add code
517 explicitly nulling out all the variables discovered. Fixes one known
518 bug: a transport crash, where a dangling pointer for $sending_ip_address
519 originally assigned in a verify callout, is re-used.
521 PP/06 Drop '.' from @INC in various Perl scripts.
523 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
525 PP/08 Reduce a number of compilation warnings under clang; building with
526 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
527 should be warning-free.
529 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
531 HS/01 Fix portability problems introduced by PP/08 for platforms where
532 realloc(NULL) is not equivalent to malloc() [SunOS et al].
534 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
535 chunk. This allows us to accept broken chunked messages. We need a more
536 general solution here.
538 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
539 already-broken messages in the queue.
541 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
543 JH/19 Fix reference counting bug in routing-generated-address tracking.
549 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
550 supports it and a size is available (ie. the sending peer gave us one).
552 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
553 years of being deprecated). The replacements are the ACLs
554 acl_smtp_mime and acl_not_smtp_mime.
556 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
557 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
558 or even an in-clear connection were permitted. Now, if the host lookup
559 was dnssec and dane was requested then the host is only used if the
560 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
561 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
562 if one fails this test.
563 This means that a poorly-configured remote DNS will make it incommunicado;
564 but it protects against a DNS-interception attack on it.
566 JH/04 Bug 1810: make continued-use of an open smtp transport connection
567 non-noisy when a race steals the message being considered.
569 JH/05 If main configuration option tls_certificate is unset, generate a
570 self-signed certificate for inbound TLS connections.
572 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
573 in rewrites and routers.
575 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
576 and logged a warning sing 4.83; now they are a configuration file error.
578 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
579 (lacking @domain). Apply the same qualification processing as RCPT.
581 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
583 JH/10 Support ${sha256:} applied to a string (as well as the previous
586 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
587 a cutthrough deliver is pending, as we always want to make a connection.
588 This also avoids re-routing the message when later placing the cutthrough
589 connection after a verify cache hit.
590 Do not update it with the verify result either.
592 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
593 when routing results in more than one destination address.
595 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
596 signing (which inhibits the cutthrough capability). Previously only
597 the presence of an option was tested; now an expansion evaluating as
598 empty is permissible (obviously it should depend only on data available
599 when the cutthrough connection is made).
601 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
602 the relevant preceding SMTP command did not note the pipelining mode.
604 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
605 Previously they were not counted.
607 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
608 as one having no matching records. Previously we deferred the message
609 that needed the lookup.
611 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
612 distinguished as "(=".
614 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
615 for missing MX records. Previously it only worked for missing A records.
617 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
619 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
620 after the data-go-ahead and data-ack. Patch from Jason Betts.
622 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
623 even for a "none" policy. Patch from Tony Meyer.
625 JH/22 Fix continued use of a connection for further deliveries. If a port was
626 specified by a router, it must also match for the delivery to be
629 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
630 When one of the recipients of a message was unsuitable for the connection
631 (has no matching addresses), we lost track of needing to mark it
632 deferred. As a result mail would be lost.
634 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
636 JH/25 Decoding ACL controls is now done using a binary search; the source code
637 takes up less space and should be simpler to maintain. Merge the ACL
638 condition decode tables also, with similar effect.
640 JH/26 Fix problem with one_time used on a redirect router which returned the
641 parent address unchanged. A retry would see the parent address marked as
642 delivered, so not attempt the (identical) child. As a result mail would
645 JH/27 Fix a possible security hole, wherein a process operating with the Exim
646 UID can gain a root shell. Credit to http://www.halfdog.net/ for
647 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
650 JH/28 Enable {spool,log} filesystem space and inode checks as default.
651 Main config options check_{log,spool}_{inodes,space} are now
652 100 inodes, 10MB unless set otherwise in the configuration.
654 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
655 Previously it only applied to the main-section connection policy
658 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
660 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
661 by me. Added RFC7919 DH primes as an alternative.
663 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
664 are not in the system include path.
666 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
667 GnuTLS, when a session startup failed (eg because the client disconnected)
668 Exim did stdio operations after fclose. This was exposed by a recent
669 change which nulled out the file handle after the fclose.
671 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
672 signed directly by the cert-signing cert, rather than an intermediate
673 OCSP-signing cert. This is the model used by LetsEncrypt.
675 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
677 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
678 an incoming connection.
680 HS/02 Bug 1802: Do not half-close the connection after sending a request
683 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
684 fallback to "prime256v1".
686 JH/34 SECURITY: Use proper copy of DATA command in error message.
687 Could leak key material. Remotely exploitable. CVE-2016-9963.
693 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
694 and 3.4.4 - once the server is enabled to respond to an OCSP request
695 it does even when not requested, resulting in a stapling non-aware
696 client dropping the TLS connection.
698 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
699 support variable-length bit vectors. No functional change.
701 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
702 The I= interface field on outgoing lines is now after the H= remote
703 host field, same as incoming lines. There is a separate
704 outgoing_interface log selector which allows you to disable the
707 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
708 If not running log_selector +smtp_connection the mainlog would be held
709 open indefinitely after a "too many connections" event, including to a
710 deleted file after a log rotate. Leave the per net connection logging
711 leaving it open for efficiency as that will be quickly detected by the
712 check on the next write.
714 HS/01 Bug 1671: Fix post transport crash.
715 Processing the wait-<transport> messages could crash the delivery
716 process if the message IDs didn't exist for some reason. When
717 using 'split_spool_directory=yes' the construction of the spool
718 file name failed already, exposing the same netto behaviour.
720 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
721 mime_regex ACL conditions.
723 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
724 to DSN fail messages (bounces): remote IP, remote greeting, remote response
725 to HELO, local diagnostic string.
727 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
728 log line to debug. Even when configured with a tls authenticator many
729 client connections are expected to not authenticate in this way, so
730 an authenticate fail is not an error.
732 HS/02 Add the Exim version string to the process info. This way exiwhat
733 gives some more detail about the running daemon.
735 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
736 matter for fast-change records such as DNSBLs.
738 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
739 retry record, even if constant. There may be multiple transports with
740 different interface settings and the retry behaviour needs to be kept
743 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
745 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
747 JH/10 Bug 840: fix log_defer_output option of pipe transport
749 JH/11 Bug 830: use same host for all RCPTS of a message, even under
750 hosts_randomize. This matters a lot when combined with mua_wrapper.
752 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
753 ${quote_pgsql:<string>} operator.
755 JH/13 Bug 1708: avoid misaligned access in cached lookup.
757 JH/14 Change header file name for freeradius-client. Relevant if compiling
758 with Radius support; from the Gentoo tree and checked under Fedora.
760 JH/15 Bug 1712: Introduce $prdr_requested flag variable
762 JH/16 Bug 1714: Permit an empty string as expansion result for transport
763 option transport_filter, meaning no filtering.
765 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
767 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
768 defaults to "*" (all hosts). The variable is now available when not built
769 with TLS, default unset, mainly to enable keeping the testsuite sane.
770 If a server certificate is not supplied (via tls_certificate) an error is
771 logged, and clients will find TLS connections fail on startup. Presumably
772 they will retry in-clear.
773 Packagers of Exim are strongly encouraged to create a server certificate
774 at installation time.
776 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
777 with the $config_file variable.
779 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
780 in transport context, after the attempt, and per-recipient. The latter type
781 is per host attempted. The event data is the error message, and the errno
782 information encodes the lookup type (A vs. MX) used for the (first) host,
783 and the trailing two digits of the smtp 4xx response.
785 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
786 to write to mainlog (or rejectlog, paniclog) in the window between file
787 creation and permissions/ownership being changed. Particularly affects
788 installations where exicyclog is run as root, rather than exim user;
789 result is that the running daemon panics and dies.
791 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
793 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
794 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
795 "pri" and "weight". Note that the previous implicit priority given by the
796 list order is no longer honoured.
798 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
801 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
802 by defining SUPPORT_SOCKS.
804 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
805 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
806 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
807 variables are renamed to proxy_{local,external}_{address,port}.
809 JH/27 Move Internationalisation support from Experimental to mainline, enabled
810 for a build by defining SUPPORT_I18N
812 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
813 of the query string, and make ${quote_redis:} do that quoting.
815 JH/29 Move Events support from Experimental to mainline, enabled by default
816 and removable for a build by defining DISABLE_EVENT.
818 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
820 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
821 cached by the daemon.
823 JH/32 Move Redis support from Experimental to mainline, enabled for a build
824 by defining LOOKUP_REDIS. The libhiredis library is required.
826 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
827 keys are given for lookup.
829 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
830 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
831 only supported when built with TLS support. The PolarSSL SHA routines
832 are still used when the TLS library is too old for convenient support.
834 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
835 openssl_options), for security. OpenSSL forces this from version 1.1.0
836 server-side so match that on older versions.
838 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
839 allocation for $value could be released as the expansion processing
840 concluded, but leaving the global pointer active for it.
842 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
843 and to use the domains and local_parts ACL conditions.
845 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
846 incorrectly not doubled on cutthrough transmission, hence seen as a
847 body-termination at the receiving system - resulting in truncated mails.
848 Commonly the sender saw a TCP-level error, and retransmitted the message
849 via the normal store-and-forward channel. This could result in duplicates
850 received - but deduplicating mailstores were liable to retain only the
851 initial truncated version.
853 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
855 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
857 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
858 we're in there, support oversigning also; bug 1309.
860 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
862 HS/04 Add support for keep_environment and add_environment options.
864 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
865 either intentional arithmetic overflow during PRNG, or testing config-
868 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
869 delivery resulted in actual delivery. Cancel cutthrough before DATA
872 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
873 rejects a recipient: pass the reject to the originator.
875 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
876 Many were false-positives and ignorable, but it's worth fixing the
879 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
880 for the new environment-manipulation done at startup. Move the routines
881 from being local to tls.c to being global via the os.c file.
883 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
884 an extract embedded as result-arg for a map, the first arg for extract
885 is unavailable so we cannot tell if this is a numbered or keyed
886 extraction. Accept either.
892 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
895 JH/02 The smtp transport option "multi_domain" is now expanded.
897 JH/03 The smtp transport now requests PRDR by default, if the server offers
900 JH/04 Certificate name checking on server certificates, when exim is a client,
901 is now done by default. The transport option tls_verify_cert_hostnames
902 can be used to disable this per-host. The build option
903 EXPERIMENTAL_CERTNAMES is withdrawn.
905 JH/05 The value of the tls_verify_certificates smtp transport and main options
906 default to the word "system" to access the system default CA bundle.
907 For GnuTLS, only version 3.0.20 or later.
909 JH/06 Verification of the server certificate for a TLS connection is now tried
910 (but not required) by default. The verification status is now logged by
911 default, for both outbound TLS and client-certificate supplying inbound
914 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
917 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
918 Status Notification (bounce) messages are now MIME format per RFC 3464.
919 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
920 under the control of the dsn_advertise_hosts option, and routers may
921 have a dsn_lasthop option.
923 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
924 default, modifiable by a malware= option. The list separator for
925 the options can now be changed in the usual way. Bug 68.
927 JH/10 The smtp_receive_timeout main option is now expanded before use.
929 JH/11 The incoming_interface log option now also enables logging of the
930 local interface on delivery outgoing connections.
932 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
933 if the interface and destination host and port all match.
935 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
938 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
939 Patch from Andrew Lewis.
941 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
942 now supports optional time-restrictions, weighting, and priority
943 modifiers per server. Patch originally by <rommer@active.by>.
945 JH/16 The spamd_address main option now supports a mixed list of local
946 and remote servers. Remote servers can be IPv6 addresses, and
947 specify a port-range.
949 JH/17 Bug 68: The spamd_address main option now supports an optional
950 timeout value per server.
952 JH/18 Bug 1581: Router and transport options headers_add/remove can
953 now have the list separator specified.
955 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
958 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
961 JH/21 Support for the A6 type of dns record is withdrawn.
963 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
964 rather than the verbs used.
966 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
967 from 255 to 1024 chars.
969 JH/24 Verification callouts now attempt to use TLS by default.
971 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
972 are generic router options now. The defaults didn't change.
974 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
975 Original patch from Alexander Shikoff, worked over by JH.
977 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
978 files if ZCAT_COMMAND is not executable.
980 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
982 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
984 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
985 Normally benign, it bites when the pair was led to by a CNAME;
986 modern usage is to not canonicalize the domain to a CNAME target
987 (and we were inconsistent anyway for A-only vs AAAA+A).
989 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
991 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
992 when evaluating $sender_host_dnssec.
994 JH/31 Check the HELO verification lookup for DNSSEC, adding new
995 $sender_helo_dnssec variable.
997 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
999 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1001 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1003 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1004 documented as working, but never had. Support all but $spam_report.
1006 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1007 added for tls authenticator.
1009 HS/03 Add perl_taintmode main config option
1015 TL/01 When running the test suite, the README says that variables such as
1016 no_msglog_check are global and can be placed anywhere in a specific
1017 test's script, however it was observed that placement needed to be near
1018 the beginning for it to behave that way. Changed the runtest perl
1019 script to read through the entire script once to detect and set these
1020 variables, reset to the beginning of the script, and then run through
1021 the script parsing/test process like normal.
1023 TL/02 The BSD's have an arc4random API. One of the functions to induce
1024 adding randomness was arc4random_stir(), but it has been removed in
1025 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1026 function when detected.
1028 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1029 cause callback expansion.
1031 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1032 syntax errors in an expansion can be treated as a string instead of
1033 logging or causing an error, due to the internal use of bool_lax
1034 instead of bool when processing it.
1036 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1037 server certificates when making smtp deliveries.
1039 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1041 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1043 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1045 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1046 Merged patch from Sebastian Wiedenroth.
1048 JH/05 Fix results-pipe from transport process. Several recipients, combined
1049 with certificate use, exposed issues where response data items split
1050 over buffer boundaries were not parsed properly. This eventually
1051 resulted in duplicates being sent. This issue only became common enough
1052 to notice due to the introduction of connection certificate information,
1053 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1055 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1056 size buffer was used, resulting in syntax errors when an expansion
1059 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1060 version 3.3.6 or later.
1062 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1063 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1064 both become "event_action", the variables become $event_name, $event_data
1065 and $event_defer_errno. There is a new variable $verify_mode, usable in
1066 routers, transports and related events. The tls:cert event is now also
1067 raised for inbound connections, if the main configuration event_action
1070 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1071 early OCSP support, but no stapling (appears to be less than 1.0.0).
1073 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1074 server certificate names available under the smtp transport option
1075 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1078 JH/10 Time-related extraction expansions from certificates now use the main
1079 option "timezone" setting for output formatting, and are consistent
1080 between OpenSSL and GnuTLS compilations. Bug 1541.
1082 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1083 encoded parameter in the incoming message. Bug 1558.
1085 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1086 include certificate info, eximon was claiming there were spoolfile
1089 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1091 JH/14 Log delivery-related information more consistently, using the sequence
1092 "H=<name> [<ip>]" wherever possible.
1094 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1095 are problematic for Debian distribution, omit them from the release
1098 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1100 JH/16 Fix string representation of time values on 64bit time_t architectures.
1103 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1104 output list separator was used.
1109 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1110 checkers that were complaining about end of non-void function with no
1113 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1114 This was a regression introduced in 4.83 by another bugfix.
1116 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1118 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1119 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1125 TF/01 Correctly close the server side of TLS when forking for delivery.
1127 When a message was received over SMTP with TLS, Exim failed to clear up
1128 the incoming connection properly after forking off the child process to
1129 deliver the message. In some situations the subsequent outgoing
1130 delivery connection happened to have the same fd number as the incoming
1131 connection previously had. Exim would try to use TLS and fail, logging
1132 a "Bad file descriptor" error.
1134 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1135 utilities have not been installed.
1137 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1138 temporary space as the ACL may create new global variables.
1140 TL/01 LDAP support uses per connection or global context settings, depending
1141 upon the detected version of the libraries at build time.
1143 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1144 to extract and use the src ip:port in logging and expansions as if it
1145 were a direct connection from the outside internet. PPv2 support was
1146 updated based on HAProxy spec change in May 2014.
1148 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1150 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1151 Properly escape header and check for NULL return.
1153 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1156 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1158 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1159 characters in header names, implemented as a verify condition.
1160 Contributed by Michael Fischer v. Mollard.
1162 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1163 results permerror and temperror. Previous values are deprecated but
1164 still accepted. In a future release, err_perm and err_temp will be
1165 completely removed, which will be a backward incompatibility if the
1166 ACL tests for either of these two old results. Patch contributed by
1167 user bes-internal on the mailing list.
1169 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1171 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1172 selectors, in both main and reject logs.
1174 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1177 JH/07 Add malware type "sock" for talking to simple daemon.
1179 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1181 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1182 routers/transports under cutthrough routing.
1184 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1185 numbers. Touch up "bool" conditional to keep the same definition.
1187 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1189 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1191 JH/12 Expand items in router/transport headers_add or headers_remove lists
1192 individually rather than the list as a whole. Bug 1452.
1194 Required for reasonable handling of multiple headers_ options when
1195 they may be empty; requires that headers_remove items with embedded
1196 colons must have them doubled (or the list-separator changed).
1198 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1199 view the policy declared in the DMARC record. Currently, $dmarc_status
1200 is a combined value of both the record presence and the result of the
1203 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1205 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1206 dnslookup router and the smtp transport (applying to the forward
1209 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1210 of ldap servers used for a specific lookup. Patch provided by Heiko
1213 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1214 New variable $lookup_dnssec_authenticated for observability.
1216 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1217 Patch submitted by Lars Timman.
1219 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1221 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1222 Requires trusted mode and valid format message id, aborts otherwise.
1223 Patch contributed by Heiko Schlichting.
1225 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1226 certextract with support for various fields. Bug 1358.
1228 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1229 is requested by default, modifiable by smtp transport option
1232 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1233 operate on certificate variables to give certificate fingerprints
1234 Also new ${sha256:cert_variable}.
1236 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1238 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1239 Christian Aistleitner.
1241 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1243 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1244 file. Patch from Wolfgang Breyha.
1246 JH/25 Expand the coverage of the delivery $host and $host_address to
1247 client authenticators run in verify callout. Bug 1476.
1249 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1250 align with daemon_smtp_ports. Bug 72.
1252 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1253 support and error reporting did not work properly.
1255 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1256 and is readable. Patch from Andrew Colin Kissa.
1258 TL/14 Enhance documentation of ${run expansion and how it parses the
1259 commandline after expansion, particularly in the case when an
1260 unquoted variable expansion results in an empty value.
1262 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1264 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1265 by renaming away from it. Addresses GH issue 15, reported by
1268 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1270 TL/15 SECURITY: prevent double expansion in math comparison functions
1271 (can expand unsanitized data). Not remotely exploitable.
1278 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1280 PP/02 Make -n do something, by making it not do something.
1281 When combined with -bP, the name of an option is not output.
1283 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1286 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1287 $sender_host_name and config options to manage this, and basic check
1290 PP/05 DSCP support for outbound connections and control modifier for inbound.
1292 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1293 (Only plugin which currently uses this is kerberos4, which nobody should
1294 be using, but we should make it available and other future plugins might
1295 conceivably use it, even though it would break NAT; stuff *should* be
1296 using channel bindings instead).
1298 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1299 name; added for Sendmail compatibility; requires admin caller.
1300 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1301 just ignore it); requires trusted caller.
1302 Also parse but ignore: -Ac -Am -X<logfile>
1305 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1307 TL/02 Add +smtp_confirmation as a default logging option.
1309 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1310 Patch by Magnus Holmgren from 2007-02-20.
1312 TL/04 Bugzilla 1281 - Spec typo.
1313 Bugzilla 1283 - Spec typo.
1314 Bugzilla 1290 - Spec grammar fixes.
1316 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1318 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1320 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1321 mailing list by by Dmitry Isaikin.
1323 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1325 JH/02 Support "G" suffix to numbers in ${if comparisons.
1327 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1329 NM/01 Bugzilla 1197 - Spec typo
1330 Bugzilla 1196 - Spec examples corrections
1332 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1334 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1335 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1338 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1339 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1341 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1342 "acl {{name}{arg}...}", and optional args on acl condition
1345 JH/05 Permit multiple router/transport headers_add/remove lines.
1347 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1349 JH/07 Avoid using a waiting database for a single-message-only transport.
1350 Performance patch from Paul Fisher. Bugzilla 1262.
1352 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1355 JH/09 Add $headers_added variable, with content from use of ACL modifier
1356 add_header (but not yet added to the message). Bugzilla 199.
1358 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1359 Pulled from Bugzilla 817 by Wolfgang Breyha.
1361 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1363 (nb: this is the same fix as in Exim 4.80.1)
1365 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1368 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1371 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1373 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1374 advertise SMTP AUTH mechanism to us, instead of a generic
1375 protocol violation error. Also, make Exim more robust to bad
1376 data from the Dovecot auth socket.
1378 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1380 When a queue runner is handling a message, Exim first routes the
1381 recipient addresses, during which it prunes them based on the retry
1382 hints database. After that it attempts to deliver the message to
1383 any remaining recipients. It then updates the hints database using
1386 So if a recipient address works intermittently, it can get repeatedly
1387 deferred at routing time. The retry hints record remains fresh so the
1388 address never reaches the final cutoff time.
1390 This is a fairly common occurrence when a user is bumping up against
1391 their storage quota. Exim had some logic in its local delivery code
1392 to deal with this. However it did not apply to per-recipient defers
1393 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1395 This change adds a proper retry rule check during routing so that the
1396 final cutoff time is checked against the message's age. We only do
1397 this check if there is an address retry record and there is not a
1398 domain retry record; this implies that previous attempts to handle
1399 the address had the retry_use_local_parts option turned on. We use
1400 this as an approximation for the destination being like a local
1401 delivery, as in LMTP.
1403 I suspect this new check makes the old local delivery cutoff check
1404 redundant, but I have not verified this so I left the code in place.
1406 TF/02 Correct gecos expansion when From: is a prefix of the username.
1408 Test 0254 submits a message to Exim with the header
1412 When I ran the test suite under the user fanf2, Exim expanded
1413 the header to contain my full name, whereas it should have added
1414 a Resent-Sender: header. It erroneously treats any prefix of the
1415 username as equal to the username.
1417 This change corrects that bug.
1419 GF/01 DCC debug and logging tidyup
1420 Error conditions log to paniclog rather than rejectlog.
1421 Debug lines prefixed by "DCC: " to remove any ambiguity.
1423 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1425 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1426 Bug spotted by Jeremy Harris; was flawed since initial commit.
1427 Would have resulted in OCSP responses post-SNI triggering an Exim
1428 NULL dereference and crash.
1430 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1432 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1433 Bug detection, analysis and fix by Samuel Thibault.
1434 Bugzilla 1331, Debian bug #698092.
1436 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1438 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1439 Server implementation by Todd Lyons, client by JH.
1440 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1441 config variable "prdr_enable" controls whether the server
1442 advertises the facility. If the client requests PRDR a new
1443 acl_data_smtp_prdr ACL is called once for each recipient, after
1444 the body content is received and before the acl_smtp_data ACL.
1445 The client is controlled by both of: a hosts_try_prdr option
1446 on the smtp transport, and the server advertisement.
1447 Default client logging of deliveries and rejections involving
1448 PRDR are flagged with the string "PRDR".
1450 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1451 fclose(). Diagnosis by Todd Lyons.
1453 PP/17 Update configure.default to handle IPv6 localhost better.
1454 Patch by Alain Williams (plus minor tweaks).
1457 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1458 This is now consistent with GnuTLS, and is now documented: the
1459 previous undocumented portable approach to treating the option as
1460 unset was to force an expansion failure. That still works, and
1461 an empty string is now equivalent.
1463 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1464 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1465 not performing validation itself.
1467 PP/20 Added force_command boolean option to pipe transport.
1468 Patch from Nick Koston, of cPanel Inc.
1470 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1473 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1475 PP/21 Fix eximon continuous updating with timestamped log-files.
1476 Broken in a format-string cleanup in 4.80, missed when I repaired the
1477 other false fix of the same issue.
1478 Report and fix from Heiko Schlichting.
1481 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1482 Report from Prashanth Katuri.
1484 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1485 It's SecureTransport, so affects any MacOS clients which use the
1486 system-integrated TLS libraries, including email clients.
1488 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1489 using a MIME ACL for non-SMTP local injection.
1490 Report and assistance in diagnosis by Warren Baker.
1492 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1494 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1496 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1497 last id that failed so it may be referenced in subsequent ACL's.
1499 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1502 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1503 ldap library initialization, allowing self-signed CA's to be
1504 used. Also properly sets require_cert option later in code by
1505 using NULL (global ldap config) instead of ldap handle (per
1506 session). Bug diagnosis and testing by alxgomz.
1508 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1509 the src/util/ subdirectory.
1511 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1512 renamed to Transport Post Delivery Action by Jeremy Harris, as
1515 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1516 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1517 redis_servers = needs to be configured which will be used by the redis
1518 lookup. Patch from Warren Baker, of The Packet Hub.
1520 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1522 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1523 hostname or reverse DNS when processing a host list. Used suggestions
1524 from multiple comments on this bug.
1526 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1528 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1529 Missed a few lines, added it to make the runtest require no keyboard
1532 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1533 contains upper case chars. Make router use caseful_local_part.
1535 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1536 support when GnuTLS has been built with p11-kit.
1542 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1544 This, or similar/improved, will also be change PP/11 of 4.82.
1550 PP/01 Handle short writes when writing local log-files.
1551 In practice, only affects FreeBSD (8 onwards).
1552 Bugzilla 1053, with thanks to Dmitry Isaikin.
1554 NM/01 Bugzilla 949 - Documentation tweak
1556 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1559 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1561 PP/02 Implemented gsasl authenticator.
1563 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1565 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1566 `pkg-config foo` for cflags/libs.
1568 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1569 with rest of GSASL and with heimdal_gssapi.
1571 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1572 `pkg-config foo` for cflags/libs for the TLS implementation.
1574 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1575 properties get this fed in as external SSF. A number of robustness
1576 and debugging improvements to the cyrus_sasl authenticator.
1578 PP/08 cyrus_sasl server now expands the server_realm option.
1580 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1581 Patch by Jeremy Harris.
1583 PP/10 Added dbmjz lookup type.
1585 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1587 PP/12 MAIL args handles TAB as well as SP, for better interop with
1588 non-compliant senders.
1589 Analysis and variant patch by Todd Lyons.
1591 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1592 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1593 Patch from Dirk Mueller <dmueller@suse.com>
1595 PP/13 tls_peerdn now print-escaped for spool files.
1596 Observed some $tls_peerdn in wild which contained \n, which resulted
1597 in spool file corruption.
1599 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1600 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1601 or write after TLS renegotiation, which otherwise led to messages
1604 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1605 as a tracking header (ie: a signed header comes before the signature).
1606 Patch from Wolfgang Breyha.
1608 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1609 comma-sep list; embedded commas doubled.
1611 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1613 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1615 Report and patch from Dmitry Banschikov.
1617 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1618 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1619 failures. We appear to now support TLS1.1+ with Exim.
1621 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1622 lets Exim select keys and certificates based upon TLS SNI from client.
1623 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1624 before an outbound SMTP session. New log_selector, +tls_sni.
1626 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1627 NULL dereference. Report and patch from Alun Jones.
1629 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1630 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1631 Not seeing resolver debug output on NetBSD, but suspect this is a
1632 resolver implementation change.
1634 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1635 Left warnings. Added "eximon gdb" invocation mode.
1637 PP/21 Defaulting "accept_8bitmime" to true, not false.
1639 PP/22 Added -bw for inetd wait mode support.
1641 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1642 locate the relevant includes and libraries. Made this the default.
1644 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1645 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1647 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1648 This may cause build issues on older platforms.
1650 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1651 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1652 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1653 Added SNI support via GnuTLS too.
1654 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1656 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1658 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1659 Applied second patch from Janne, implementing suggestion to default
1660 multiple-strings-in-record handling to match SPF spec.
1662 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1664 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1665 read-only, out of scope).
1666 Patch from Wolfgang Breyha, report from Stuart Northfield.
1668 PP/29 Fix three issues highlighted by clang analyser static analysis.
1669 Only crash-plausible issue would require the Cambridge-specific
1670 iplookup router and a misconfiguration.
1671 Report from Marcin Mirosław.
1673 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1675 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1676 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1677 As part of this, removing so much warning spew let me fix some minor
1678 real issues in debug logging.
1680 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1681 assignment on my part. Fixed.
1683 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1684 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1685 Janne Snabb (who went above and beyond: thank you).
1687 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1688 string otherwise requires a connection and a bunch more work and it's
1689 relatively easy to get wrong. Should also expose TLS library linkage
1692 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1693 64-bit ${eval} (JH/03).
1695 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1696 GNU libc to support some of the 64-bit stuff, should not lead to
1697 conflicts. Defined before os.h is pulled in, so if a given platform
1698 needs to override this, it can.
1700 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1701 protection layer was required, which is not implemented.
1702 Bugzilla 1254, patch from Wolfgang Breyha.
1704 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1705 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1706 tls_dhparam take prime identifiers. Also unbreak combination of
1707 OpenSSL+DH_params+TLSSNI.
1709 PP/39 Disable SSLv2 by default in OpenSSL support.
1715 PP/01 Solaris build fix for Oracle's LDAP libraries.
1716 Bugzilla 1109, patch from Stephen Usher.
1718 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1720 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1723 TF/02 Fix a couple more cases where we did not log the error message
1724 when unlink() failed. See also change 4.74-TF/03.
1726 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1727 lock up or crash if it happened to be inside a call to libc when it
1728 got a SIGUSR1 from exiwhat.
1730 The SIGUSR1 handler appends the current process status to the process
1731 log which is later printed by exiwhat. It used to use the general
1732 purpose logging code to do this, but several functions it calls are
1733 not safe for signals.
1735 The new output code in the SIGUSR1 handler is specific to the process
1736 log, and simple enough that it's easy to inspect for signal safety.
1737 Removing some special cases also simplifies the general logging code.
1738 Removing the spurious timestamps from the process log simplifies
1741 TF/04 Improved ratelimit ACL condition.
1743 The /noupdate option has been deprecated in favour of /readonly which
1744 has clearer semantics. The /leaky, /strict, and /readonly update modes
1745 are mutually exclusive. The update mode is no longer included in the
1746 database key; it just determines when the database is updated. (This
1747 means that when you upgrade Exim will forget old rate measurements.)
1749 Exim now checks that the per_* options are used with an update mode that
1750 makes sense for the current ACL. For example, when Exim is processing a
1751 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1752 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1753 must specify per_mail/readonly. If you omit the update mode it defaults to
1754 /leaky where that makes sense (as before) or /readonly where required.
1756 The /noupdate option is now undocumented but still supported for
1757 backwards compatibility. It is equivalent to /readonly except that in
1758 ACLs where /readonly is required you may specify /leaky/noupdate or
1759 /strict/noupdate which are treated the same as /readonly.
1761 A useful new feature is the /count= option. This is a generalization
1762 of the per_byte option, so that you can measure the throughput of other
1763 aggregate values. For example, the per_byte option is now equivalent
1764 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1766 The per_rcpt option has been generalized using the /count= mechanism
1767 (though it's more complicated than the per_byte equivalence). When it is
1768 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1769 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1770 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1771 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1772 Note that using per_rcpt with a non-readonly update mode in more than
1773 one ACL will cause the recipients to be double-counted. (The per_mail
1774 and per_byte options don't have this problem.)
1776 The handling of very low rates has changed slightly. If the computed rate
1777 is less than the event's count (usually one) then this event is the first
1778 after a long gap. In this case the rate is set to the same as this event's
1779 count, so that the first message of a spam run is counted properly.
1781 The major new feature is a mechanism for counting the rate of unique
1782 events. The new per_addr option counts the number of different
1783 recipients that someone has sent messages to in the last time period. It
1784 behaves like per_rcpt if all the recipient addresses are different, but
1785 duplicate recipient addresses do not increase the measured rate. Like
1786 the /count= option this is a general mechanism, so the per_addr option
1787 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1788 example, measure the rate that a client uses different sender addresses
1789 with the options per_mail/unique=$sender_address. There are further
1790 details in the main documentation.
1792 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1794 TF/06 Removed a few PCRE remnants.
1796 TF/07 Automatically extract Exim's version number from tags in the git
1797 repository when doing development or release builds.
1799 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1800 Bugzilla 879. Patch from Paul Fisher.
1802 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1803 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1806 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1808 PP/05 Variable $av_failed, true if the AV scanner deferred.
1809 Bugzilla 1078. Patch from John Horne.
1811 PP/06 Stop make process more reliably on build failure.
1812 Bugzilla 1087. Patch from Heiko Schlittermann.
1814 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1815 Bugzilla 1089. Patch from Heiko Schlittermann.
1817 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1818 Bugzilla 1131. Patch from Holger Weiß.
1820 PP/09 Handle IPv6 addresses with SPF.
1821 Bugzilla 860. Patch from Wolfgang Breyha.
1823 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1825 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1828 PP/11 match_* no longer expand right-hand-side by default.
1829 New compile-time build option, EXPAND_LISTMATCH_RHS.
1830 New expansion conditions, "inlist", "inlisti".
1832 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1834 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1836 PP/14 fix log_write() format string regression from TF/03.
1837 Bugzilla 1152. Patch from Dmitry Isaikin.
1843 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1845 PP/02 Harmonised TLS library version reporting; only show if debugging.
1846 Layout now matches that introduced for other libraries in 4.74 PP/03.
1848 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1850 PP/04 New "dns_use_edns0" global option.
1852 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1855 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1856 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1858 TK/01 Updated PolarSSL code to 0.14.2.
1859 Bugzilla 1097. Patch from Andreas Metzler.
1861 PP/07 Catch divide-by-zero in ${eval:...}.
1862 Fixes bugzilla 1102.
1864 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1867 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1868 format-string attack -- SECURITY: remote arbitrary code execution.
1870 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1871 time unintentionally subject to list matching rules, letting the header
1872 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1873 arbitrary string expansion). This allowed for information disclosure.
1875 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1876 INT_MIN/-1 -- value coerced to INT_MAX.
1882 NM/01 Workaround for PCRE version dependency in version reporting
1885 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1886 This fixes portability to compilers other than gcc, notably
1887 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1889 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1890 makefiles for portability to HP-UX and POSIX correctness.
1892 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1893 Also via indented variable definition in the Makefile.
1894 (Debugging by Oliver Heesakkers).
1896 PP/02 Restore caching of spamd results with expanded spamd_address.
1897 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1899 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1900 Improves build reliability. Fix from: Frank Elsner
1902 NM/02 Fix wide character breakage in the rfc2047 coding
1903 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1905 NM/03 Allow underscore in dnslist lookups
1906 Fixes bug 1026. Patch from Graeme Fowler
1908 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1909 Code patches from Adam Ciarcinski of NetBSD.
1911 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1914 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1915 is logged, to avoid truncation. Patch from John Horne.
1917 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1918 Patch from Jakob Hirsch.
1920 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1921 SQL string expansion failure details.
1922 Patch from Andrey Oktyabrski.
1924 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1925 Patch from Simon Arlott.
1927 PP/09 New lookups functionality failed to compile on old gcc which rejects
1928 extern declarations in function scope.
1929 Patch from Oliver Fleischmann
1931 PP/10 Use sig_atomic_t for flags set from signal handlers.
1932 Check getgroups() return and improve debugging.
1933 Fixed developed for diagnosis in bug 927 (which turned out to be
1936 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1937 Patch from Mark Zealey.
1939 PP/12 Bugzilla 1056: Improved spamd server selection.
1940 Patch from Mark Zealey.
1942 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1943 Based on patch from Heiko Schlittermann.
1945 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1946 Patch from Uwe Doering, sign-off by Michael Haardt.
1948 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1949 variable declaration deep within a block. Bug and patch from
1952 PP/15 lookups-Makefile IRIX compatibility coercion.
1954 PP/16 Make DISABLE_DKIM build knob functional.
1956 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1957 Patch by Simon Arlott
1959 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1960 variable argument macros. Our copy now differs from upstream.
1966 TF/01 Failure to get a lock on a hints database can have serious
1967 consequences so log it to the panic log.
1969 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1970 controlled using the smtp_confirmation log selector.
1972 TF/03 Include the error message when we fail to unlink a spool file.
1974 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1975 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1976 for maintaining out-of-tree patches for some time.
1978 PP/01 Bugzilla 139: Documentation and portability issues.
1979 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1980 Handle per-OS dynamic-module compilation flags.
1982 PP/02 Let /dev/null have normal permissions.
1983 The 4.73 fixes were a little too stringent and complained about the
1984 permissions on /dev/null. Exempt it from some checks.
1985 Reported by Andreas M. Kirchwitz.
1987 PP/03 Report version information for many libraries, including
1988 Exim version information for dynamically loaded libraries. Created
1989 version.h, now support a version extension string for distributors
1990 who patch heavily. Dynamic module ABI change.
1992 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1993 privilege escalation vulnerability whereby the Exim run-time user
1994 can cause root to append content of the attacker's choosing to
1997 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2000 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2001 If dropping privileges for untrusted macros, we disabled normal logging
2002 on the basis that it would fail; for the Exim run-time user, this is not
2003 the case, and it resulted in successful deliveries going unlogged.
2004 Fixed. Reported by Andreas Metzler.
2010 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2011 only prepend for the Resent-* case. Fixes regression introduced in
2012 Exim 4.70 by NM/22 for Bugzilla 607.
2014 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2015 increasing numbers of administrators be bitten by this.
2017 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2019 PP/03 Bugzilla 994: added openssl_options main configuration option.
2021 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2023 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2025 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2027 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2028 without a peer certificate, leading to a segfault because of an
2029 assumption that peers always have certificates. Be a little more
2030 paranoid. Problem reported by Martin Tscholak.
2032 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2033 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2034 NB: ClamAV planning to remove STREAM in "middle of 2010".
2035 CL also introduces -bmalware, various -d+acl logging additions and
2036 more caution in buffer sizes.
2038 PP/09 Implemented reverse_ip expansion operator.
2040 PP/10 Bugzilla 937: provide a "debug" ACL control.
2042 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2044 PP/12 Bugzilla 973: Implement --version.
2046 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2048 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2050 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2052 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2053 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2054 ignore trailing whitespace.
2056 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2058 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2061 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2062 Notification from Dr Andrew Aitchison.
2064 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2065 ExtendedDetectionInfo response format.
2066 Notification from John Horne.
2068 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2071 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2072 XSL and documented dependency on system catalogs, with examples of how
2075 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2078 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2079 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2080 configuration file which is writeable by the Exim user or group.
2082 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2083 of configuration files to cover files specified with the -C option if
2084 they are going to be used with root privileges, not just the default
2087 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2088 option (effectively making it always true).
2090 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2091 files to be used while preserving root privileges.
2093 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2094 that rogue child processes cannot use them.
2096 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2097 run-time user, instead of root.
2099 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2100 Exim run-time user without dropping privileges.
2102 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2103 result string, instead of calling string_vformat() twice with the same
2106 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2107 for other users. Others should always drop root privileges if they use
2108 -C on the command line, even for a whitelisted configure file.
2110 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2112 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2118 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2119 $data_path, and $header_path variables; fixed documentation bugs and
2122 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2123 exipick to access non-standard spools, including the "frozen" queue
2126 NM/01 Bugzilla 965: Support mysql stored procedures.
2127 Patch from Alain Williams
2129 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2131 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2132 Patch from Andreas Metzler
2134 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2135 Patch from Kirill Miazine
2137 NM/05 Bugzilla 671: Added umask to procmail example.
2139 JJ/03 installed exipick 20100323.0, fixing doc bug
2141 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2142 directory. Notification and patch from Dan Rosenberg.
2144 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2146 TK/02 Improve log output when DKIM signing operation fails.
2148 MH/01 Treat the transport option dkim_domain as a colon separated
2149 list, not as a single string, and sign the message with each element,
2150 omitting multiple occurences of the same signer.
2152 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2153 Bugzilla 985, 986. Patch by Simon Arlott
2155 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2156 Patch by Simon Arlott
2158 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2159 MBX locking. Notification from Dan Rosenberg.
2165 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2167 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2169 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2171 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2173 NM/04 Bugzilla 915: Flag broken perl installation during build.
2179 TK/01 Added patch by Johannes Berg that expands the main option
2180 "spamd_address" if it starts with a dollar sign.
2182 TK/02 Write list of recipients to X-Envelope-Sender header when building
2183 the mbox-format spool file for content scanning (suggested by Jakob
2186 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2187 (http://www.dcc-servers.net/) support via dccifd. Activated by
2188 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2190 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2191 by Mark Daniel Reidel <mr@df.eu>.
2193 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2194 When building exim an external PCRE library is now needed -
2195 PCRE is a system library on the majority of modern systems.
2196 See entry on PCRE_LIBS in EDITME file.
2198 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2199 conversation. Added nologin parameter to request.
2200 Patch contributed by Kirill Miazine.
2202 TF/01 Do not log submission mode rewrites if they do not change the address.
2204 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2206 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2207 log files in place. Contributed by Roberto Lima.
2209 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2211 TF/03 Bugzilla 615: When checking the local_parts router precondition
2212 after a local_part_suffix or local_part_prefix option, Exim now
2213 does not use the address's named list lookup cache, since this
2214 contains cached lookups for the whole local part.
2216 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2217 Robert Millan. Documentation is in experimental-spec.txt.
2219 TF/04 Bugzilla 668: Fix parallel build (make -j).
2221 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2223 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2224 Patch provided by Jan Srzednicki.
2226 TF/05 Leading white space used to be stripped from $spam_report which
2227 wrecked the formatting. Now it is preserved.
2229 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2230 that they are available at delivery time.
2232 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2234 TF/08 TLS error reporting now respects the incoming_interface and
2235 incoming_port log selectors.
2237 TF/09 Produce a more useful error message if an SMTP transport's hosts
2238 setting expands to an empty string.
2240 NM/06 Bugzilla 744: EXPN did not work under TLS.
2241 Patch provided by Phil Pennock.
2243 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2244 Patch provided by Richard Godbee.
2246 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2247 acl_smtp_notquit, added index entry.
2249 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2250 Patch provided by Eugene Bujak.
2252 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2253 accept(). Patch provided by Maxim Dounin.
2255 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2256 Patch provided by Phil Pennock.
2258 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2260 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2261 Patch provided by Brad "anomie" Jorsch.
2263 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2264 Patch provided by Dean Brooks.
2266 TK/05 Add native DKIM support (does not depend on external libraries).
2268 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2269 Patch provided by Graeme Fowler.
2271 NM/16 Bugzilla 851: Documentation example syntax fix.
2273 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2275 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2278 NM/19 Bugzilla 745: TLS version reporting.
2279 Patch provided by Phil Pennock.
2281 NM/20 Bugzilla 167: bool: condition support.
2282 Patch provided by Phil Pennock.
2284 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2285 clients. Patch provided by Phil Pennock.
2287 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2288 Patch provided by Brad "anomie" Jorsch.
2290 NM/23 Bugzilla 687: Fix misparses in eximstats.
2291 Patch provided by Heiko Schlittermann.
2293 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2294 Patch provided by Heiko Schlittermann.
2296 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2297 plus update to original patch.
2299 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2301 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2302 Patch provided by David Brownlee.
2304 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2306 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2308 NM/30 Bugzilla 888: TLS documentation bugfixes.
2310 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2312 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2313 Unlike the original bugzilla I have changed all shell scripts in src tree.
2315 NM/33 Bugzilla 898: Transport filter timeout fix.
2316 Patch by Todd Rinaldo.
2318 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2319 Patch by Serge Demonchaux.
2321 NM/35 Bugzilla 39: Base64 decode bug fixes.
2322 Patch by Jakob Hirsch.
2324 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2326 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2328 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2330 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2336 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2337 ALT-N's libdkim that I have put here:
2338 http://duncanthrax.net/exim-experimental/
2340 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2341 were called 'true' and it seems that C99 defines that as a reserved
2342 keyword to be used with 'bool' variable types. That means you could
2343 not include C99-style headers which use bools without triggering
2344 build errors in sieve.c.
2346 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2347 as mailq or other aliases. Changed the --help handling significantly
2348 to do whats expected. exim_usage() emits usage/help information.
2350 SC/01 Added the -bylocaldomain option to eximstats.
2352 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2354 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2356 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2362 PH/01 Another patch from the Sieve maintainer.
2364 PH/02 When an IPv6 address is converted to a string for single-key lookup
2365 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2366 dots are used instead of colons so that keys in lsearch files need not
2367 contain colons. This was done some time before quoting was made available
2368 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2369 (notated using the quote facility) so as to distinguish them from IPv4
2370 keys. This meant that lookups for IP addresses in host lists did not work
2371 for iplsearch lookups.
2373 This has been fixed by arranging for IPv6 addresses to be expressed with
2374 colons if the lookup type is iplsearch. This is not incompatible, because
2375 previously such lookups could never work.
2377 The situation is now rather anomalous, since one *can* have colons in
2378 ordinary lsearch keys. However, making the change in all cases is
2379 incompatible and would probably break a number of configurations.
2381 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2384 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2385 conversion specification without a maximum field width, thereby enabling
2386 a rogue spamd server to cause a buffer overflow. While nobody in their
2387 right mind would setup Exim to query an untrusted spamd server, an
2388 attacker that gains access to a server running spamd could potentially
2389 exploit this vulnerability to run arbitrary code as the Exim user.
2391 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2392 $primary_hostname instead of what libspf2 thinks the hosts name is.
2394 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2395 a directory entry by the name of the lookup key. Previously, if a
2396 symlink pointed to a non-existing file or a file in a directory that
2397 Exim lacked permissions to read, a lookup for a key matching that
2398 symlink would fail. Now it is enough that a matching directory entry
2399 exists, symlink or not. (Bugzilla 503.)
2401 PH/03 The body_linecount and body_zerocount variables are now exported in the
2404 PH/04 Added the $dnslist_matched variable.
2406 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2407 This means they are set thereafter only if the connection becomes
2410 PH/06 Added the client_condition to authenticators so that some can be skipped
2411 by clients under certain conditions.
2413 PH/07 The error message for a badly-placed control=no_multiline_responses left
2414 "_responses" off the end of the name.
2416 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2418 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2419 (without spaces) instead of just copying the configuration text.
2421 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2423 PH/11 Added $max_received_linelength.
2425 PH/12 Added +ignore_defer and +include_defer to host lists.
2427 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2428 way in which PCRE > 7.0 is built.
2430 PH/14 Implemented queue_only_load_latch.
2432 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2433 MAIL command. The effect was to mangle the value on 64-bit systems.
2435 PH/16 Another patch from the Sieve maintainer.
2437 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2439 PH/18 If a system quota error occurred while trying to create the file for
2440 a maildir delivery, the message "Mailbox is full" was not appended to the
2441 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2442 only to a quota excession during the actual writing of the file.
2444 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2445 characters?) which causes problems in log lines. The DN values are now
2446 passed through string_printing() before being added to log lines.
2448 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2449 and InterBase are left for another time.)
2451 PH/21 Added message_body_newlines option.
2453 PH/22 Guard against possible overflow in moan_check_errorcopy().
2455 PH/23 POSIX allows open() to be a macro; guard against that.
2457 PH/24 If the recipient of an error message contained an @ in the local part
2458 (suitably quoted, of course), incorrect values were put in $domain and
2459 $local_part during the evaluation of errors_copy.
2465 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2466 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2469 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2470 issue a MAIL command.
2472 PH/02 In an ACL statement such as
2474 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2476 if a client was not listed at all, or was listed with a value other than
2477 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2478 the condition was not true (as it should be), so access was not denied.
2479 The bug was that the ! inversion was incorrectly passed on to the second
2480 item. This has been fixed.
2482 PH/03 Added additional dnslists conditions == and =& which are different from
2483 = and & when the dns lookup returns more than one IP address.
2485 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2486 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2488 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2489 FSYNC, which compiles an option called disable_fsync that allows for
2490 bypassing fsync(). The documentation is heavily laced with warnings.
2492 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2494 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2495 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2496 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2497 including adding "make clean"; (3) Added -fPIC when compiling the test
2498 dynamically loaded module, to get rid of a warning.
2500 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2501 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2502 = 0s. The bug is otherwise harmless.
2504 PH/07 There was a bug in the dovecot authenticator such that the value of
2505 $auth1 could be overwritten, and so not correctly preserved, after a
2506 successful authentication. This usually meant that the value preserved by
2507 the server_setid option was incorrect.
2509 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2511 PH/09 Installed PCRE release 7.0.
2513 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2514 run for batched SMTP input. It is now run at the start of every message
2515 in the batch. While fixing this I discovered that the process information
2516 (output by running exiwhat) was not always getting set for -bs and -bS
2517 input. This is fixed, and it now also says "batched" for BSMTP.
2519 PH/11 Added control=no_pipelining.
2521 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2522 patch, slightly modified), and move the expansion of helo_data till after
2523 the connection is made in the smtp transport (so it can use these
2526 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2528 PH/14 Added log_selector = +pid.
2530 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2532 PH/16 Add ${if forany and ${if forall.
2534 PH/17 Added dsn_from option to vary the From: line in DSNs.
2536 PH/18 Flush SMTP output before performing a callout, unless control =
2537 no_callout_flush is set.
2539 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2540 was true (the default) a successful delivery failed to delete the retry
2541 item, thus causing premature timeout of the address. The bug is now
2544 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2546 PH/21 Long custom messages for fakedefer and fakereject are now split up
2547 into multiline responses in the same way that messages for "deny" and
2548 other ACL rejections are.
2550 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2551 with slight modification.
2553 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2554 draft, changing the syntax and factoring some duplicate code".
2556 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2557 for deliveries of the second and subsequent messages over the same SMTP
2560 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2561 ${reduce, with only minor "tidies".
2563 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2565 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2566 expansion side effects.
2568 PH/27 When a message times out after an over-quota error from an Exim-imposed
2569 quota, the bounce message says "mailbox is full". This message was not
2570 being given when it was a system quota that was exceeded. It now should
2573 MH/03 Made $recipients available in local_scan(). local_scan() already has
2574 better access to the recipient list through recipients_list[], but
2575 $recipients can be useful in postmaster-provided expansion strings.
2577 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2578 in the case of a MAIL command with additional options following the
2579 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2580 were accidentally chopped off.
2582 PH/29 SMTP synchronization checks are implemented when a command is read -
2583 there is a check that no more input is waiting when there shouldn't be
2584 any. However, for some commands, a delay in an ACL can mean that it is
2585 some time before the response is written. In this time, more input might
2586 arrive, invalidly. So now there are extra checks after an ACL has run for
2587 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2588 pipelining has not been advertised.
2590 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2592 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2593 returned in the SMTP response when smtp_return_error_details was false.
2594 This has been fixed.
2596 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2597 instead of the C I/O that was originally supplied, because problems were
2598 reported on Solaris.
2600 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2601 Exim which did not show up earlier: it was assuming that a call to
2602 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2603 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2604 was a macro that became an assignment, so it seemed to work. This has
2605 changed to a proper function call with a void return, hence the compile
2606 error. Exim's code has been fixed.
2608 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2611 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2613 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2615 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2616 because it turns out to be too big or there is a timeout) there is no
2617 "Completed" line in the log. When some messages of this type were
2618 selected by exigrep, they were listed as "not completed". Others were
2619 picked up by some special patterns. I have improved the selection
2620 criteria to be more general.
2622 PH/38 The host_find_failed option in the manualroute router can now be set
2623 to "ignore", to completely ignore a host whose IP address cannot be
2624 found. If all hosts are ignored, the behaviour is controlled by the new
2625 host_all_ignored option.
2627 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2628 homing or because of multiple MX records with /mx) generated more than
2629 one IP address, and the following item turned out to be the local host,
2630 all the secondary addresses of the first item were incorrectly removed
2631 from the list, along with the local host and any following hosts (which
2632 is what is supposed to happen).
2634 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2635 whoever called Exim into the -H file. In the case of the daemon it was
2636 behaving confusingly. When first started, it used values for whoever
2637 started the daemon, but after a SIGHUP it used the Exim user (because it
2638 calls itself on a restart). I have changed the code so that it now always
2641 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2642 message are rejected with the same error (e.g. no authentication or bad
2643 sender address), and a DATA command is nevertheless sent (as can happen
2644 with PIPELINING or a stupid MUA), the error message that was given to the
2645 RCPT commands is included in the rejection of the DATA command. This is
2646 intended to be helpful for MUAs that show only the final error to their
2649 PH/42 Another patch from the Sieve maintainer.
2651 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2652 Eximstats - Fixed some broken HTML links and added missing column headers
2654 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2655 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2657 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2659 PH/43 Yet another patch from the Sieve maintainer.
2661 PH/44 I found a way to check for a TCP/IP connection going away before sending
2662 the response to the final '.' that terminates a message, but only in the
2663 case where the client has not sent further data following the '.'
2664 (unfortunately, this is allowed). However, in many cases there won't be
2665 any further data because there won't be any more messages to send. A call
2666 to select() can be used: if it shows that the input is "ready", there is
2667 either input waiting, or the socket has been closed. An attempt to read
2668 the next input character can distinguish the two cases. Previously, Exim
2669 would have sent an OK response which the client would never have see.
2670 This could lead to message repetition. This fix should cure that, at
2671 least in a lot of common cases.
2673 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2674 advertised in response to EHLO.
2680 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2681 fixed by 4.65/MH/01 (is this a record?) are fixed:
2683 (i) An empty string was always treated as zero by the numeric comparison
2684 operators. This behaviour has been restored.
2686 (ii) It is documented that the numeric comparison operators always treat
2687 their arguments as decimal numbers. This was broken in that numbers
2688 starting with 0 were being interpreted as octal.
2690 While fixing these problems I realized that there was another issue that
2691 hadn't been noticed. Values of message_size_limit (both the global option
2692 and the transport option) were treated as octal if they started with 0.
2693 The documentation was vague. These values are now always treated as
2694 decimal, and I will make that clear in the documentation.
2700 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2701 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2704 MH/01 Don't check that the operands of numeric comparison operators are
2705 integers when their expansion is in "skipping" mode (fixes bug
2706 introduced by 4.64-PH/07).
2708 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2709 child addresses, Exim now panics and dies. Previously, because the count
2710 is held in a short int, deliveries were likely to be lost. As such a
2711 large number of recipients for a single message is ridiculous
2712 (performance will be very, very poor), I have chosen to impose a limit
2713 rather than extend the field.
2719 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2720 leftover -K file (the existence of which was triggered by #402).
2721 While we were at it, introduced process PID as part of the -K
2722 filename. This should rule out race conditions when creating
2725 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2726 processing considerably. Previous code took too long for large mails,
2727 triggering a timeout which in turn triggers #401.
2729 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2730 in the DK code in transports.c. sendfile() is not really portable,
2731 hence the _LINUX specificness.
2733 TF/01 In the add_headers option to the mail command in an Exim filter,
2734 there was a bug that Exim would claim a syntax error in any
2735 header after the first one which had an odd number of characters
2738 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2739 callout verification, Exim cached a "reject" for the entire domain. This
2740 is correct for most verifications, but it is not correct for a recipient
2741 verification with use_sender or use_postmaster set, because in that case
2742 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2743 case of MAIL FROM:<> rejection from other early rejections (e.g.
2744 rejection of HELO). When verifying a recipient using a non-null MAIL
2745 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2746 Whatever the result of the callout, the value of the domain cache is
2747 left unchanged (for any other kind of callout, getting as far as trying
2748 RCPT means that the domain itself is ok).
2750 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2753 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2754 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2755 session, the daemon ignores ECONNECT errors and logs others; it now
2756 ignores EPIPE as well.
2758 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2759 (quoted-printable decoding).
2761 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2762 later the small subsequent patch to fix an introduced bug.
2764 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2766 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2768 PH/08 An error is now given if message_size_limit is specified negative.
2770 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2771 to be given (somewhat) arbitrary names.
2773 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2776 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2777 miscellaneous code fixes
2779 PH/10 Added the log_reject_target ACL modifier to specify where to log
2782 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2783 hostname. This is wrong, because it relates to the incoming message (and
2784 probably the interface on which it is arriving) and not to the outgoing
2785 callout (which could be using a different interface). This has been
2786 changed to use the value of the helo_data option from the smtp transport
2787 instead - this is what is used when a message is actually being sent. If
2788 there is no remote transport (possible with a router that sets up host
2789 addresses), $smtp_active_hostname is used.
2791 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2792 tweaks were necessary in order to get it to work (see also 21 below):
2793 (a) The code assumed that strncpy() returns a negative number on buffer
2794 overflow, which isn't the case. Replaced with Exim's string_format()
2796 (b) There were several signed/unsigned issues. I just did the minimum
2797 hacking in of casts. There is scope for a larger refactoring.
2798 (c) The code used strcasecmp() which is not a standard C function.
2799 Replaced with Exim's strcmpic() function.
2800 (d) The code set only $1; it now sets $auth1 as well.
2801 (e) A simple test gave the error "authentication client didn't specify
2802 service in request". It would seem that Dovecot has changed its
2803 interface. Fortunately there's a specification; I followed it and
2804 changed what the client sends and it appears to be working now.
2806 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2809 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2810 address A is aliased to B and C, where B exists and C does not. Without
2811 -v the output is "A verified" because verification stops after a
2812 successful redirection if more than one address is generated. However,
2813 with -v the child addresses are also verified. Exim was outputting "A
2814 failed to verify" and then showing the successful verification for C,
2815 with its parentage. It now outputs "B failed to verify", showing B's
2816 parentage before showing the successful verification of C.
2818 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2819 look up a TXT record in a specific list after matching in a combined
2822 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2823 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2824 they consult the DNS. I had assumed they would set it the way they
2825 wanted; and indeed my experiments on Linux seem to show that in some
2826 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2827 To be on the safe side, however, I have now made the interface to
2828 host_find_byname() similar to host_find_bydns(), with an argument
2829 containing the DNS resolver options. The host_find_byname() function now
2830 sets these options at its start, just as host_find_bydns() does. The smtp
2831 transport options dns_qualify_single and dns_search_parents are passed to
2832 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2833 of host_find_byname() use the default settings of RES_DEFNAMES
2834 (qualify_single) but not RES_DNSRCH (search_parents).
2836 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2837 spool_read_header() do less string testing, by means of a preliminary
2838 switch on the second character of optional "-foo" lines. (This is
2839 overdue, caused by the large number of possibilities that now exist.
2840 Originally there were few.) While I was there, I also converted the
2841 str(n)cmp tests so they don't re-test the leading "-" and the first
2842 character, in the hope this might squeeze out yet more improvement.
2844 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2845 flag allowing group syntax was set by the header_syntax check but not
2846 turned off, possible causing trouble later; (2) The flag was not being
2847 set at all for the header_verify test, causing "group"-style headers to
2848 be rejected. I have now set it in this case, and also caused header_
2849 verify to ignore an empty address taken from a group. While doing this, I
2850 came across some other cases where the code for allowing group syntax
2851 while scanning a header line wasn't quite right (mostly, not resetting
2852 the flag correctly in the right place). These bugs could have caused
2853 trouble for malformed header lines. I hope it is now all correct.
2855 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2856 with the "reply" argument non-NULL. The code, however (which originally
2857 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2858 but it didn't always do it. This confused somebody who was copying the
2859 code for some other use. I have removed all the tests.
2861 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2862 feature that was used to support insecure browsers during the U.S. crypto
2863 embargo. It requires special client support, and Exim is probably the
2864 only MTA that supported it -- and would never use it because real RSA is
2865 always available. This code has been removed, because it had the bad
2866 effect of slowing Exim down by computing (never used) parameters for the
2867 RSA_EXPORT functionality.
2869 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2870 authenticator to fail if there's a tab character in the incoming data
2871 (there should never be unless someone is messing about, as it's supposed
2872 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2873 if the connection is using TLS or if the remote IP is the same as the
2874 local IP, and the "valid-client-cert option" if a client certificate has
2877 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2878 authenticators. This can be used for authorization after authentication
2879 succeeds. (In the case of plaintext, it servers for both authentication
2882 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2883 if any retry times were supplied.
2885 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2886 connection, where there is no client IP address to check. In this
2887 situation, the verify now always succeeds.
2889 PH/25 Applied John Jetmore's -Mset patch.
2891 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2893 PH/27 In a string expansion for a processed (not raw) header when multiple
2894 headers of the same name were present, leading whitespace was being
2895 removed from all of them, but trailing whitespace was being removed only
2896 from the last one. Now trailing whitespace is removed from each header
2897 before concatenation. Completely empty headers in a concatenation (as
2898 before) are ignored.
2900 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2901 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2903 PH/29 [Removed. This was a change that I later backed out, and forgot to
2904 correct the ChangeLog entry (that I had efficiently created) before
2905 committing the later change.]
2907 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2908 address errors (4xx response to RCPT) over the same connection as other
2909 messages routed to the same hosts. Such deliveries are always "forced",
2910 so retry times are not inspected. This resulted in far too many retries
2911 for the affected addresses. The effect occurred only when there were more
2912 hosts than the hosts_max_try setting in the smtp transport when it had
2913 the 4xx errors. Those hosts that it had tried were not added to the list
2914 of hosts for which the message was waiting, so if all were tried, there
2915 was no problem. Two fixes have been applied:
2917 (i) If there are any address or message errors in an SMTP delivery, none
2918 of the hosts (tried or untried) are now added to the list of hosts
2919 for which the message is waiting, so the message should not be a
2920 candidate for sending over the same connection that was used for a
2921 successful delivery of some other message. This seems entirely
2922 reasonable: after all the message is NOT "waiting for some host".
2923 This is so "obvious" that I'm not sure why it wasn't done
2924 previously. Hope I haven't missed anything, but it can't do any
2925 harm, as the worst effect is to miss an optimization.
2927 (ii) If, despite (i), such a delivery is accidentally attempted, the
2928 routing retry time is respected, so at least it doesn't keep
2929 hammering the server.
2931 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2932 in ${readsocket because some servers need this prod.
2934 PH/32 Added some extra debug output when updating a wait-xxx database.
2936 PH/33 The hint "could be header name not terminated by colon", which has been
2937 given for certain expansion errors for a long time, was not being given
2938 for the ${if def:h_colon_omitted{... case.
2940 PH/34 The spec says: "With one important exception, whenever a domain list is
2941 being scanned, $domain contains the subject domain." There was at least
2942 one case where this was not true.
2944 PH/35 The error "getsockname() failed: connection reset by peer" was being
2945 written to the panic log as well as the main log, but it isn't really
2946 panic-worthy as it just means the connection died rather early on. I have
2947 removed the panic log writing for the ECONNRESET error when getsockname()
2950 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2951 runs only) independently of the message's sender address. This meant
2952 that, if the 4xx error was in fact related to the sender, a different
2953 message to the same recipient with a different sender could confuse
2954 things. In particular, this can happen when sending to a greylisting
2955 server, but other circumstances could also provoke similar problems.
2956 I have changed the default so that the retry time for these errors is now
2957 based a combination of the sender and recipient addresses. This change
2958 can be overridden by setting address_retry_include_sender=false in the
2961 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2962 remote server are returned as part of bounce messages. This was not
2963 happening for LMTP over a pipe (the lmtp transport), but now it is the
2964 same for both kinds of LMTP.
2966 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2967 in header lines that were in fact CNAMEs. This is no longer the case.
2969 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2970 and queue runs started by the daemon processed all messages. This has
2971 been fixed so that -R and -S can now usefully be given with -q<time>.
2973 PH/40 Import PCRE release 6.7 (fixes some bugs).
2975 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2977 PH/42 Give an error if -q is specified more than once.
2979 PH/43 Renamed the variables $interface_address and $interface_port as
2980 $received_ip_address and $received_port, to make it clear that these
2981 values apply to message reception, and not to the outgoing interface when
2982 a message is delivered. (The old names remain recognized, of course.)
2984 PH/44 There was no timeout on the connect() call when using a Unix domain
2985 socket in the ${readsocket expansion. There now is.
2987 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2988 be meaningful with "accept".
2990 SC/01 Eximstats V1.43
2991 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2993 SC/02 Eximstats V1.44
2994 Use a glob alias rather than an array ref in the generated
2995 parser. This improves both readability and performance.
2997 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2998 Collect SpamAssassin and rejection statistics.
2999 Don't display local sender or destination tables unless
3000 there is data to show.
3001 Added average volumes into the top table text output.
3003 SC/04 Eximstats V1.46
3004 Collect data on the number of addresses (recipients)
3005 as well as the number of messages.
3007 SC/05 Eximstats V1.47
3008 Added 'Message too big' to the list of mail rejection
3009 reasons (thanks to Marco Gaiarin).
3011 SC/06 Eximstats V1.48
3012 Mainlog lines which have GMT offsets and are too short to
3013 have a flag are now skipped.
3015 SC/07 Eximstats V1.49 (Alain Williams)
3016 Added the -emptyok flag.
3018 SC/08 Eximstats V1.50
3019 Fixes for obtaining the IP address from reject messages.
3021 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3022 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3023 whitespace changes from 4.64-PH/27
3025 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3028 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3029 are found, allow negative numbers in numeric criteria)
3031 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3033 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3034 to match changes made in 4.64-PH/43
3036 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3038 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3039 "domain" is actually an IP address, and force a failure. This locks out
3040 those revolvers/nameservers that support "A-for-A" lookups, in
3041 contravention of the specifications.
3043 PH/48 When a host name was looked up from an IP address, and the subsequent
3044 forward lookup of the name timed out, the host name was left in
3045 $sender_host_name, contrary to the specification.
3047 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3048 restricted to single-key lookups, Exim was not diagnosing an error if
3049 * or *@ was used with a query-style lookup.
3051 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3053 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3054 long ago, but noone interested enough thought of it. Let's just say that
3055 the "1.1" means that there are some new functions that weren't there at
3056 some point in the past.
3058 PH/51 Error processing for expansion failure of helo_data from an smtp
3059 transport during callout processing was broken.
3061 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3062 tested/used via the -bh/-bhc/-bs options.
3064 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3065 bug, fixed in subsequent PCRE releases).
3067 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3068 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3070 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3076 SC/01 Use a glob alias rather than an array ref in eximstats generated
3077 parser. This improves both readability and performance.
3079 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3080 Don't display local sender or destination tables in eximstats unless
3081 there is data to show.
3082 Added average volumes into the eximstats top table text output.
3084 SC/03 Collect data on the number of addresses (recipients) as well
3085 as the number of messages in eximstats.
3087 TF/01 Correct an error in the documentation for the redirect router. Exim
3088 does (usually) call initgroups() when daemonizing.
3090 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3091 with consistent privilege compared to when running as a daemon.
3093 TF/03 Note in the spec that $authenticated_id is not set for local
3094 submissions from trusted users.
3096 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3097 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3099 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3100 by adding some example configuration directives to the default
3101 configuration file. A little bit of work is required to uncomment the
3102 directives and define how usernames and passwords are checked, but
3103 there is now a framework to start from.
3105 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3106 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3107 without this. I don't know how relevant this is to other LDAP libraries.
3109 PH/02 Add the verb name to the "unknown ACL verb" error.
3111 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3113 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3115 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3116 directory not expanded when it should be if an expanded home directory
3117 was set for the address (which is overridden by the transport).
3119 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3122 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3123 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3124 because it is too late at that time, and has no effect.
3126 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3127 security issue with \' (bugzilla #107). I could not use the
3128 PQescapeStringConn() function, because it needs a PGconn value as one of
3131 PH/08 When testing addresses using -bt, indicate those final addresses that
3132 are duplicates that would not cause an additional delivery. At least one
3133 person was confused, thinking that -bt output corresponded to deliveries.
3134 (Suppressing duplicates isn't a good idea as you lose the information
3135 about possibly different redirections that led to the duplicates.)
3137 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3138 systems where poll() doesn't work, in particular OS X.
3140 PH/10 Added more information to debugging output for retry time not reached.
3142 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3143 operations in malware.c.
3145 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3148 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3149 syslog_duplication set false, log lines that would normally be written
3150 both the the main log and to the reject log were not written to syslog at
3153 PH/14 In the default configuration, change the use of "message" in ACL warn
3154 statements to "add_header".
3156 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3157 not followed by a command (e.g. "seen endif").
3159 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3160 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3163 PH/17 Added extra conditions to the default value of delay_warning_condition
3167 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3168 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3169 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3172 The Auto-Submitted: and various List- headers are standardised, whereas I
3173 don't think Precedence: ever was.
3175 PH/18 Refactored debugging code in route_finduser() to show more information,
3176 in particular, the error code if getpwnam() issues one.
3178 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3179 This is apparently needed in addition to the PH/07 change above to avoid
3180 any possible encoding problems.
3182 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3183 but not after initializing Perl.
3185 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3186 output them only if debugging. By default they are written stderr,
3187 apparently, which is not desirable.
3189 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3192 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3195 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3197 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3198 authenticated or an ident call has been made. Suppress the default
3199 values for $authenticated_id and $authenticated_sender (but permit -oMai
3200 and -oMas) when testing with -bh.
3202 PH/24 Re-jigged the order of the tests in the default configuration so that the
3203 tests for valid domains and recipients precede the DNS black list and CSA
3204 tests, on the grounds that those ones are more expensive.
3206 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3207 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3208 This bug exists in every version of Exim that I still have, right back to
3211 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3212 However, an attempt to turn on case-sensitivity in a regex key by
3213 including (?-i) didn't work because the subject string was already
3214 lowercased, and the effects were non-intuitive. It turns out that a
3215 one-line patch can be used to allow (?-i) to work as expected.
3221 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3222 other effects) broke the use of negated acl sub-conditions.
3224 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3227 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3228 "Deny" causes Exim to reject the incoming connection with a 554 error.
3229 Unfortunately, if there is a major crisis, such as a disk failure,
3230 tcp-wrappers gives "deny", whereas what one would like would be some
3231 kind of temporary error. A kludge has been added to help with this.
3232 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3233 554 error is used if errno is still zero or contains ENOENT (which occurs
3234 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3237 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3239 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3240 errors. Otherwise a message that provokes a temporary error (when other
3241 messages do not) can cause a whole host to time out.
3243 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3244 addresses were routed directly to files or pipes from a redirect router.
3245 File deliveries just didn't batch; pipe deliveries might have suffered
3248 PH/06 A failure to get a lock for a hints database would erroneously always say
3249 "Failed to get write lock", even when it was really a read lock.
3251 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3252 of 0600. This has been changed to use the value of the lockfile_mode
3253 option (which defaults to 0600).
3255 PH/08 Applied small patch from the Sieve maintainer.
3257 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3258 folder from quota calculations, a direct delivery into this folder messed
3259 up the contents of the maildirsize file. This was because the regex was
3260 used only to exclude .Trash (or whatever) when the size of the mailbox
3261 was calculated. There was no check that a delivery was happening into an
3262 excluded directory. This bug has been fixed by ignoring all quota
3263 processing for deliveries into excluded directories.
3265 PH/10 Added the maildirfolder_create_regex option to appendfile.
3271 PH/01 The code for finding all the local interface addresses on a FreeBSD
3272 system running IPv6 was broken. This may well have applied to all BSD
3273 systems, as well as to others that have similar system calls. The broken
3274 code found IPv4 interfaces correctly, but gave incorrect values for the
3275 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3276 that it would not match correctly against @[] and not recognize the IPv6
3279 PH/02 The ipliteral router was not recognizing addresses of the form user@
3280 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3282 PH/03 Added disable_ipv6.
3284 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3285 decoded form, because it is most often used to construct To: headers
3286 lines in autoreplies, and the decoded form may well be syntactically
3287 invalid. However, $reply_address has leading white space removed, and all
3288 newlines turned into spaces so that the autoreply transport does not
3291 PH/05 If group was specified without a user on a router, and no group or user
3292 was specified on a transport, the group from the router was ignored.
3294 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3295 for visible compile-time settings that can be used to change these
3296 numbers, for those that want even more. Backwards compatibility with old
3297 spool files has been maintained. However, going back to a previous Exim
3298 release will lost any variables that are in spool files.
3300 PH/07 Two small changes when running in the test harness: increase delay when
3301 passing a TCP/IP connection to a new process, in case the original
3302 process has to generate a bounce, and remove special handling of
3303 127.0.0.2 (sic), which is no longer necessary.
3305 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3306 be the same on different OS.
3308 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3311 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3312 whether --show-vars was specified or not
3314 JJ/02 exipick: Added support for new ACL variable spool format introduced
3317 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3318 syntactically invalid From: or Reply-to: line, and a filter used this to
3319 generate an autoreply, and therefore failed to obtain an address for the
3320 autoreply, Exim could try to deliver to a non-existent relative file
3321 name, causing unrelated and misleading errors. What now happens is that
3322 it logs this as a hard delivery error, but does not attempt to create a
3325 PH/11 The exinext utility has a -C option for testing purposes, but although
3326 the given file was scanned by exinext itself; it wasn't being passed on
3327 when Exim was called.
3329 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3330 an end-of-file indication when reading a command response.
3332 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3333 compiled. In many other places in Exim, IPv6 addresses are always
3334 recognized, so I have changed this. It also means that IPv4 domain
3335 literals of the form [IPV4:n.n.n.n] are now always recognized.
3337 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3338 used if the router is not running as root, for example, when verifying at
3339 ACL time, or when using -bh. The debugging output from this situation was
3340 non-existent - all you got was a failure to exec. I have made two
3343 (a) Failures to set uid/gid, the current directory, or a process leader
3344 in a subprocess such as that created by queryprogram now generate
3345 suitable debugging output when -d is set.
3347 (b) The queryprogram router detects when it is not running as root,
3348 outputs suitable debugging information if -d is set, and then runs
3349 the subprocess without attempting to change uid/gid.
3351 PH/15 Minor change to Makefile for building test_host (undocumented testing
3354 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3355 additional section of a DNS packet that returns MX or SRV records.
3356 Instead, it always explicitly searches for A/AAAA records. This avoids
3357 major problems that occur when a DNS server includes only records of one
3358 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3359 fixed another bug: if SRV records were looked up and the corresponding
3360 address records were *not* found in the additional section, the port
3361 values from the SRV records were lost.
3363 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3364 using the correct key (the original address) when searching the retry
3365 rules in order to find which one to use for generating the retry hint.
3367 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3368 adding the default one. Similarly, if it contains a Reply-To: header, the
3369 errors_reply_to option, if set, is not used.
3371 PH/19 When calculating a retry time, Exim used to measure the "time since
3372 failure" by looking at the "first failed" field in the retry record. Now
3373 it does not use this if it is later than than the arrival time of the
3374 message. Instead it uses the arrival time. This makes for better
3375 behaviour in cases where some deliveries succeed, thus re-setting the
3376 "first failed" field. An example is a quota failure for a huge message
3377 when small messages continue to be delivered. Without this change, the
3378 "time since failure" will always be short, possible causing more frequent
3379 delivery attempts for the huge message than are intended.
3380 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3382 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3383 $1, $2, $3) because the numerical variables can be reset during some
3384 expansion items (e.g. "match"), thereby losing the authentication data.
3386 PH/21 Make -bV show the size of off_t variables so that the test suite can
3387 decide whether to run tests for quotas > 2G.
3389 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3390 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3391 filecount value is greater than 2G or if a quota value is greater than 2G
3392 on a system where the size of off_t is not greater than 4, a panic error
3395 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3396 never match. The debug and -bh output now contains an explicit error
3397 message indicating a malformed IPv4 address or mask.
3399 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3400 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3401 PH/23 above applies.
3403 PH/25 Do not write to syslog when running in the test harness. The only
3404 occasion when this arises is a failure to open the main or panic logs
3405 (for which there is an explicit test).
3407 PH/26 Added the /no_tell option to "control=freeze".
3409 PH/27 If a host name lookup failed very early in a connection, for example, if
3410 the IP address matched host_lookup and the reverse lookup yielded a name
3411 that did not have a forward lookup, an error message of the form "no IP
3412 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3413 could be logged. Now it outputs the IP address instead of "NULL".
3415 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3416 allows the sender and the authenticated sender to be set when
3417 submitting a message from within Exim. Since child_open_exim() is
3418 documented for local_scan(), the new function should be too.
3420 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3421 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3422 results in an empty string is now treated as unset.
3424 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3426 PH/31 Added sender_verify_fail logging option.
3428 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3429 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3430 tidied the source and removed it altogether.
3432 PH/33 When a queue run was abandoned because the load average was too high, a
3433 log line was always written; now it is written only if the queue_run log
3434 selector is set. In addition, the log line for abandonment now contains
3435 information about the queue run such as the pid. This is always present
3436 in "start" and "stop" lines but was omitted from the "abandon" line.
3438 PH/34 Omit spaces between a header name and the colon in the error message that
3439 is given when verify = headers_syntax fails (if there are lots of them,
3440 the message gets confusing).
3442 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3443 names, as there are now some PTR records that contain slashes. This check
3444 is only to protect against broken name servers that fall over on strange
3445 characters, so the fact that it applies to all lookups doesn't matter.
3447 PH/36 Now that the new test suite is complete, we can remove some of the
3448 special code in Exim that was needed for the old test suite. For example,
3449 sorting DNS records because real resolvers return them in an arbitrary
3450 order. The new test suite's fake resolver always returns records in the
3453 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3454 bounces) except when queue_only is set, to avoid logging races between
3455 the different processes.
3457 PH/38 Panic-die if .include specifies a non-absolute path.
3459 PH/39 A tweak to the "H" retry rule from its user.
3461 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3462 a label. They prevented compilation on older perls.
3464 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3465 a warning to be raised on newish perls.
3467 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3468 on queue. Changes to match documented behaviour of showing count of
3469 messages matching specified criteria.
3471 PH/40 Changed the default ident timeout from 30s to 5s.
3473 PH/41 Added support for the use of login_cap features, on those BSD systems
3474 that have them, for controlling the resources used by pipe deliveries.
3476 PH/42 The content-scanning code uses fopen() to create files in which to put
3477 message data. Previously it was not paying any attention to the mode of
3478 the files. Exim runs with umask(0) because the rest of the code creates
3479 files with open(), and sets the required mode explicitly. Thus, these
3480 files were ending up world-writeable. This was not a big issue, because,
3481 being within the spool directory, they were not world-accessible. I have
3482 created a function called modefopen, which takes an additional mode
3483 argument. It sets umask(777), creates the file, chmods it to the required
3484 mode, then resets the umask. All the relevant calls to fopen() in the
3485 content scanning code have been changed to use this function.
3487 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3488 to 24 hours. This avoids potential overflow problems when processing G
3489 and H retry rules. I suspect nobody ever tinkers with this value.
3491 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3493 PH/45 When the plaintext authenticator is running as a client, the server's
3494 challenges are checked to ensure they are valid base64 strings. By
3495 default, the authentication attempt is cancelled if an invalid string is
3496 received. Setting client_ignore_invalid_base64 true ignores these errors.
3497 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3498 they are received. Thus, the responses can be made to depend on the
3499 challenges. If an invalid string is ignored, an empty string is placed in
3502 PH/46 Messages that are created by the autoreply transport now contains a
3503 References: header, in accordance with RFCs 2822 and 3834.
3505 PH/47 Added authenticated_sender_force to the smtp transport.
3507 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3509 PH/49 Installed latest patch from the Sieve maintainer.
3511 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3512 was also set, the appendfile transport was unnecessarily scanning a
3513 directory of message files (e.g. for maildir delivery) to find the count
3514 of files (along with the size), even though it did not need this
3515 information. It now does the scan only if it needs to find either the
3516 size of the count of files.
3518 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3520 PH/52 Two bugs concerned with error handling when the smtp transport is
3523 (i) Exim was not creating retry information for temporary errors given
3524 for individual recipients after the DATA command when the smtp transport
3525 was used in LMTP mode. This meant that they could be retried too
3526 frequently, and not timed out correctly.
3528 (ii) Exim was setting the flag that allows error details to be returned
3529 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3530 recipients that were returned after the DATA command.
3532 PH/53 This is related to PH/52, but is more general: for any failing address,
3533 when detailed error information was permitted to be returned to the
3534 sender, but the error was temporary, then after the final timeout, only
3535 "retry timeout exceeded" was returned. Now it returns the full error as
3536 well as "retry timeout exceeded".
3538 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3539 do this, and (what is worse) MTAs that accept it.
3541 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3542 will now be deprecated.
3544 PH/56 New os.c-cygwin from the Cygwin maintainer.
3546 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3547 formats (previously only available in exim formats via -bpr, -bpru,
3548 and -bpra. Now also available in native and exiqgrep formats)
3550 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3551 with very large, slow to parse queues
3553 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3555 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3557 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3558 responses to authentication challenges, though it was showing the
3559 challenges; (ii) I've removed the CR characters from the debug output for
3562 PH/58 Allow for the insertion of a newline as well as a space when a string
3563 is turned into more than one encoded-word during RFC 2047 encoding. The
3564 Sieve code now uses this.
3566 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3567 data_4xx, lost_connection, tls_required.
3569 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3570 message was being sent as an SMTP response.
3572 PH/61 Add -l and -k options to exicyclog.
3574 PH/62 When verifying, if an address was redirected to one new address, so that
3575 verification continued, and the new address failed or deferred after
3576 having set something in $address_data, the value of $address_data was not
3577 passed back to the ACL. This was different to the case when no
3578 redirection occurred. The value is now passed back in both cases.
3580 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3581 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3582 use login_cap.h, so on its own it isn't the distinguishing feature. The
3583 new name refers directly to the setclassresources() function.
3585 PH/65 Added configuration files for NetBSD3.
3587 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3589 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3590 is preferred over IPv4.
3592 PH/68 The bounce_return_message and bounce_return_body options were not being
3593 honoured for bounces generated during the reception of non-SMTP messages.
3594 In particular, this applied to messages rejected by the ACL. This bug has
3595 been fixed. However, if bounce_return_message is true and bounce_return_
3596 body is false, the headers that are returned for a non-SMTP message
3597 include only those that have been read before the error was detected.
3598 (In the case of an ACL rejection, they have all been read.)
3600 PH/69 The HTML version of the specification is now built in a directory called
3601 spec_html instead of spec.html, because the latter looks like a path with
3602 a MIME-type, and this confuses some software.
3604 PH/70 Catch two compiler warnings in sieve.c.
3606 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3607 function verify_get_ident() calls ip_connect() to connect a socket, but
3608 if the "connect()" function timed out, ip_connect() used to close the
3609 socket. However, verify_get_ident() also closes the socket later, and in
3610 between Exim writes to the log, which may get opened at this point. When
3611 the socket was closed in ip_connect(), the log could get the same file
3612 descriptor number as the socket. This naturally causes chaos. The fix is
3613 not to close the socket in ip_connect(); the socket should be closed by
3614 the function that creates it. There was only one place in the code where
3615 this was missing, in the iplookup router, which I don't think anybody now
3616 uses, but I've fixed it anyway.
3618 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3619 well as to direct DNS lookups. Otherwise the handling of names in host
3620 lists is inconsistent and therefore confusing.
3626 PH/01 Two changes to the default runtime configuration:
3628 (1) Move the checks for relay_from_hosts and authenticated clients from
3629 after to before the (commented out) DNS black list checks.
3631 (2) Add control=submission to the relay_from_hosts and authenticated
3632 clients checks, on the grounds that messages accepted by these
3633 statements are most likely to be submissions.
3635 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3637 (1) Generate an error if the third argument for the ${prvs expansion is
3640 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3643 (3) Reset the variables that are obtained from the first argument of
3644 ${prvscheck and used in the second argument before leaving the code,
3645 because their memory is reclaimed, so using them afterwards may do
3648 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3649 one (it's much easier than Tom thought :-).
3651 (5) Because of (4), we can now allow for the use of $prvscheck_result
3652 inside the third argument.
3654 PH/03 For some reason, the default setting of PATH when running a command from
3655 a pipe transport was just "/usr/bin". I have changed it to
3658 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3659 anything to be listed in the output from -bV.
3661 PH/05 When a filter generated an autoreply, the entire To: header line was
3662 quoted in the delivery log line, like this:
3664 => >A.N.Other <ano@some.domain> <original@ddress> ...
3666 This has been changed so that it extracts the operative address. There
3667 may be more than one such address. If so, they are comma-separated, like
3670 => >ano@some.domain,ona@other.domain <original@ddress> ...
3672 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3673 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3674 not being looked up in the rDNS to get a host name, Exim was showing the
3675 IP address twice in Received: lines, even though the IP addresses were
3676 identical. For example:
3678 Received: from [1.2.3.4] (helo=[1.2.3.4])
3680 However, if the real host name was known, it was omitting the HELO data
3681 if it matched the actual IP address. This has been tidied up so that it
3682 doesn't show the same IP address twice.
3684 PH/07 When both +timestamp and +memory debugging was on, the value given by
3685 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3686 called by the debug printing, thereby overwriting the timestamp buffer.
3687 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3689 PH/08 When the original message was included in an autoreply transport, it
3690 always said "this is a copy of the message, including all the headers",
3691 even if body_only or headers_only was set. It now gives an appropriate
3694 PH/09 Applied a patch from the Sieve maintainer which:
3696 o fixes some comments
3697 o adds the (disabled) notify extension core
3698 o adds some debug output for the result of if/elsif tests
3699 o points to the current vacation draft in the documentation
3700 and documents the missing references header update
3704 o fixes a bug in processing the envelope test (when testing
3705 multiple envelope elements, the last element determined the
3708 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3709 Electronic Mail") by including:
3711 Auto-submitted: auto-generated
3713 in the messages that it generates (bounce messages and others, such as
3714 warnings). In the case of bounce messages for non-SMTP messages, there was
3715 also a typo: it was using "Auto_submitted" (underscore instead of
3716 hyphen). Since every message generated by Exim is necessarily in response
3717 to another message, thes have all been changed to:
3719 Auto-Submitted: auto-replied
3721 in accordance with these statements in the RFC:
3723 The auto-replied keyword:
3725 - SHOULD be used on messages sent in direct response to another
3726 message by an automatic process,
3728 - MUST NOT be used on manually-generated messages,
3730 - MAY be used on Delivery Status Notifications (DSNs) and Message
3731 Disposition Notifications (MDNs),
3733 - MUST NOT be used on messages generated by automatic or periodic
3734 processes, except for messages which are automatic responses to
3737 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3738 to the default Received: header definition.
3740 PH/12 Added log selector acl_warn_skipped (default on).
3742 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3743 variables because (a) they are in the wrong storage pool and (b) even if
3744 they were copied, it wouldn't work properly because of the caching.
3746 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3747 checking when decoding. Apparently there are clients that generate
3748 overlong encoded strings. Why am I not surprised?
3750 PH/15 If the first argument of "${if match_address" was not empty, but did not
3751 contain an "@" character, Exim crashed. Now it writes a panic log message
3752 and treats the condition as false.
3754 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3756 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3757 extension "envelope-auth". The code is finished and in agreement with
3758 other implementations, but there is no documentation so far and in fact,
3759 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3760 not changing the active code.
3762 Print executed "if" and "elsif" statements when debugging is used. This
3763 helps a great deal to understand what a filter does.
3765 Document more things not specified clearly in RFC3028. I had all this
3766 sorted out, when out of a sudden new issues came to my mind. Oops."
3768 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3771 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3772 canonical form (as documented). However, after a host name lookup from
3773 the IP address, check_host() was doing a simple string comparison with
3774 addresses acquired from the DNS when checking that the found name did
3775 have the original IP as one of its addresses. Since any found IPv6
3776 addresses are likely to be in abbreviated form, the comparison could
3777 fail. Luckily, there already exists a function for doing the comparison
3778 by converting both addresses to binary, so now that is used instead of
3779 the text comparison.
3781 PH/20 There was another similar case to PH/19, when a complete host name was
3782 given in a host list; looking up its IP address could give an abbreviated
3783 form, whereas the current host's name might or might not be abbreviated.
3784 The same fix has been applied.
3790 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3791 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3794 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3795 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3797 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3799 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3800 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3801 Also, for "Auto-Submitted", treat anything other than "no" as
3802 non-personal, in accordance with RFC 3834. (Previously it treated
3803 anything starting "auto-" as non-personal.)
3805 TF/01 The control=submission/name=... option had a problem with syntax
3806 errors if the name included a slash character. The /name= option
3807 now slurps the rest of the string, so it can include any characters
3808 but it must come last in the list of options (after /sender_retain
3811 PH/05 Some modifications to the interface to the fake nameserver for the new
3819 TK/01 Added the "success_on_redirect" address verification option. See
3820 NewStuff for rationale and an example.
3822 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3824 PH/02 Patch to exigrep to allow it to work on syslog lines.
3826 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3827 fread() to skip over the body file's header line, because in Cygwin the
3828 header line is locked and is inaccessible.
3830 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3831 co-exist for some time) to make it clear that it is the Exim ID that is
3832 referenced, not the Message-ID: header line.
3834 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3835 string_format() function, because snprintf() does not exist on all
3838 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3839 ${stat: expansion item.
3841 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3842 protocol synchronization error", to keep the pedants happy.
3844 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3845 well as for IRIX systems, when gcc is being used. See the host.c source
3848 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3850 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3853 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3854 transport and to the smtp transport in LMTP mode.
3856 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3858 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3859 run a filter in a subprocess. This could lead to confusion in subsequent
3860 lookups in the parent process. There should also be a search_tidyup() at
3861 the end of the subprocess.
3863 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3864 only if the host matched helo_try_verify_hosts, which caused the
3865 verification to occur when the EHLO/HELO command was issued. The ACL just
3866 tested the remembered result. Now, if a previous verification attempt has
3867 not happened, "verify = helo" does it there and then.
3869 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3871 TK/03 Fix log output including CR from clamd.
3873 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3874 exist provoked a memory error which could cause a segfault.
3876 PH/15 Installed PCRE 6.2
3878 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3880 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3881 of the problem. Specifically, suggested +O2 rather than +O1 for the
3884 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3886 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3887 record, the port was not correctly logged when the outgoing_port log
3888 selector was set (it logged the transort's default port).
3890 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3891 fallback_hosts, and "hosts" in the smtp transport.
3893 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3894 host errors such as "Connection refused".
3896 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3897 authentication with radiusclient 0.4.9:
3899 - Error returned from rc_read_config was caught wrongly
3900 - Username/password not passed on to radius server due to wrong length.
3902 The presumption is that some radiusclient API changes for 4.51/PH/17
3903 were not taken care of correctly. The code is still untested by me (my
3904 Linux distribution still has 0.3.2 of radiusclient), but it was
3905 contributed by a Radius user.
3907 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3908 expanding the "port" option of the smtp transport.
3910 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3911 while reading a MIME header. Thanks to Tom Hughes for a patch.
3913 PH/24 Include config.h inside local_scan.h so that configuration settings are
3916 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3917 that in an ACL for RCPT (for example), you can examine exactly what was
3920 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3921 commands, but it was not correctly comparing the address with the actual
3922 client host address. Thus, it would show the EHLO address in Received:
3923 header lines when this was not necessary.
3925 PH/27 Added the % operator to ${eval:}.
3927 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3928 it should be ignoring failures (because with -C, for example, it has lost
3929 privilege). It wasn't ignoring creation failures other than "already
3932 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3935 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3936 because an input line was too long, either on its own, or by virtue of
3937 too many continuations, the temporary file was not being removed, and the
3938 return code was incorrect.
3940 PH/31 Missing "BOOL" in function definition in filtertest.c.
3942 PH/32 Applied Sieve patches from the maintainer.
3944 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3946 PH/33 Added "verify = not_blind".
3948 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3949 Local/Makefile (with some defaults set). These are used in built scripts
3950 such as exicyclog, but they have never been used in the exim_install
3951 script (though there are many overriding facilities there). I have
3952 arranged that the exim_install script now takes note of these two
3955 PH/35 Installed configuration files for Dragonfly.
3957 PH/36 When a locally submitted message by a trusted user did not contain a
3958 From: header, and the sender address was obtained from -f or from an SMTP
3959 MAIL command, and the trusted user did not use -F to supply a sender
3960 name, $originator_name was incorrectly used when constructing a From:
3961 header. Furthermore, $originator_name was used for submission mode
3962 messages from external hosts without From: headers in a similar way,
3963 which is clearly wrong.
3965 PH/37 Added control=suppress_local_fixups.
3967 PH/38 When log_selector = +received_sender was set, and the addition of the
3968 sender made the log line's construction buffer exactly full, or one byte
3969 less than full, an overflow happened when the terminating "\n" was
3972 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3973 when the result of a list match is failure because a DNS lookup failed.
3975 PH/40 RM_COMMAND is now used in the building process.
3977 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3978 the "build-* directories that it finds.
3980 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3981 address in a domain literal was a prefix of an interface address.
3983 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3984 when verifying a sender address, unless rewrite_headers is false.
3986 PH/44 Wrote a long comment about why errors_to addresses are verified as
3987 recipients, not senders.
3989 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3990 the ratelimit ACL was added.
3992 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3994 PH/46 Added extra information about PostgreSQL errors to the error string.
3996 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3997 avoiding the need to install special zones in a real server. This is
3998 backwards compatible; if it can't find the fake resolver, it drops back.
3999 Thus, both old and new test suites can be run.
4001 TF/02 Added util/ratelimit.pl
4003 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4004 clock is set back in time.
4006 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4007 Candler <B.Candler@pobox.com>.
4009 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4010 OK for addresses that are the result of redirections.
4012 PH/48 A number of further additions for the benefit of the new test suite,
4013 including a fake gethostbyname() that interfaces to the fake DNS resolver
4016 TF/06 The fix for widen_domains has also been applied to qualify_single and
4017 search_parents which are the other dnslookup options that can cause
4020 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4023 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4025 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4026 service" if it encountered an MX record with an empty target hostname.
4027 The message is now "an MX or SRV record indicated no SMTP service".
4029 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4030 if the DNS of the sending site is misconfigured. This is quite a
4031 common situation. This change restores the behaviour of treating a
4032 helo verification defer as a failure.
4034 PH/51 If self=fail was set on a router, the bounce message did not include the
4035 actual error message.
4041 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4043 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4044 command itself ended in error, the underlying message about the transport
4045 filter timeout was being overwritten with the pipe command error. Now the
4046 underlying error message should be appended to the second error message.
4048 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4050 PH/02 Reduce the amount of output that "make" produces by default. Full output
4051 can still be requested.
4053 PH/03 The warning log line about a condition test deferring for a "warn" verb
4054 was being output only once per connection, rather than after each
4055 occurrence (because it was using the same function as for successful
4056 "warn" verbs). This seems wrong, so I have changed it.
4058 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4059 it should not have, which might have caused a crash in the right
4060 circumstances, but probably never did.
4062 PH/04 Installed a modified version of Tony Finch's patch to make submission
4063 mode fix the return path as well as the Sender: header line, and to
4064 add a /name= option so that you can make the user's friendly name appear
4067 TF/03 Added the control = fakedefer ACL modifier.
4069 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4070 Mark Lowes for thorough testing.
4072 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4074 TK/03 Merged latest SRS patch from Miles Wilton.
4076 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4077 with the definition in sysexits.h (which is #included earlier).
4078 Fortunately, Exim does not actually use EX_OK. The code used to try to
4079 preserve the sysexits.h value, by assuming that macro definitions were
4080 scanned for macro replacements. I have been disabused of this notion,
4081 so now the code just undefines EX_OK before #including unistd.h.
4083 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4084 in the smtp transport. When a block could not be written in a single
4085 write() function, the timeout was being re-applied to each part-write.
4086 This seems wrong - if the receiver was accepting one byte at a time it
4087 would take for ever. The timeout is now adjusted when this happens. It
4088 doesn't have to be particularly precise.
4090 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4091 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4093 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4094 without a domain if the check to <postmaster@domain> fails.
4096 SC/01 Eximstats: added -xls and the ability to specify output files
4097 (patch written by Frank Heydlauf).
4099 SC/02 Eximstats: use FileHandles for outputting results.
4101 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4103 SC/04 Eximstats: fixed display of large numbers with -nvr option
4105 SC/05 Eximstats: fixed merging of reports with empty tables.
4107 SC/06 Eximstats: added the -include_original_destination flag
4109 SC/07 Eximstats: removed tabs and trailing whitespace.
4111 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4113 TK/06 MBOX spool code: Add real "From " MBOX separator line
4114 so the .eml file is really in mbox format (even though
4115 most programs do not really care). Patch from Alex Miller.
4117 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4118 The latter is generated from $received_to and is only set if the
4119 message has one envelope recipient. SA can use these headers,
4120 obviously out-of-the-box. Patch from Alex Miller.
4122 PH/08 The ${def test on a variable was returning false if the variable's
4123 value was "0", contrary to what the specification has always said!
4124 The result should be true unless the variable is empty.
4126 PH/09 The syntax error of a character other than { following "${if
4127 def:variable_name" (after optional whitespace) was not being diagnosed.
4128 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4129 accidental colon was present, for example, could give incorrect results.
4131 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4132 result is used (not including appendfile, where other changes are about
4135 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4136 This involved changing a lot of size variables from int to off_t. It
4137 should work with maildirs and everything.
4139 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4140 spamd dying while we are connected to it.
4142 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4145 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4146 function for BDB 4.3.
4148 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4150 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4151 the sources for PCRE have been re-arranged and more files are now
4154 PH/15 The code I had for printing potentially long long variables in PH/11
4155 above was not the best (it lost precision). The length of off_t variables
4156 is now inspected at build time, and an appropriate printing format (%ld
4157 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4158 to be "long long int" or "long int". This is needed for the internal
4159 formatting function string_vformat().
4161 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4162 the configuration file to be ":syslog", then the script "guesses" where
4163 the logs files are, rather than using the compiled in default. In our
4164 case the guess is not the same as the compiled default, so the script
4165 suddenly stopped working when I started to use syslog. The patch checks
4166 to see if log_file_path is "". If so, it attempts to read it from exim
4167 with no configuration file to get the compiled in version, before it
4168 falls back to the previous guessing code."
4170 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4171 implementing BATV in an Exim configuration. See NewStuff for the gory
4174 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4175 Makefile that are specific to HP-UX.
4177 PH/18 If the "use_postmaster" option was set for a recipient callout together
4178 with the "random" option, the postmaster address was used as the MAIL
4179 FROM address for the random test, but not for the subsequent recipient
4180 test. It is now used for both.
4182 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4183 patch removes a few documentation additions to RFC 3028, because the
4184 latest draft now contains them. It adds the new en;ascii-case comparator
4185 and a new error check for 8bit text in MIME parts. Comparator and
4186 require names are now matched exactly. I enabled the subaddress
4187 extension, but it is not well tested yet (read: it works for me)."
4189 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4190 rework some of the code of TK/09 above to avoid the hardwired use of
4191 "%lld" and "long long". Replaced the call to snprintf() with a call to
4194 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4195 records point to non-existent hosts", "retry timeout exceeded", and
4196 "retry time not reached for any host after a long failure period".
4198 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4199 experimental DomainKeys support:
4201 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4202 (2) On an error such as an illegally used "control", the wrong name for
4203 the control was given.
4205 These problems did NOT occur unless DomainKeys support was compiled.
4207 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4209 PH/24 Added ${if match_ip condition.
4211 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4212 databases so that it will be absolutely obvious if a crash occurs in the
4213 DB library. This is a regular occurrence (often caused by mis-matched
4216 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4217 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4218 picked up on a user's system that detects such things. There doesn't seem
4219 to be a gcc warning option for this - only an attribute that has to be
4220 put on the function's prototype. It seems that in Fedora Core 4 they have
4221 set this on a number of new functions. No doubt there will be more in due
4224 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4225 specify a transport. However, if an address that was verified by such a
4226 router was the subject of a callout, Exim crashed because it tried to
4227 read the rcpt_include_affixes from the non-existent transport. Now it
4228 just assumes that the setting of that option is false. This bug was
4229 introduced by 4.51/PH/31.
4231 PH/28 Changed -d+all to exclude +memory, because that information is very
4232 rarely of interest, but it makes the output a lot bigger. People tend to
4233 do -d+all out of habit.
4235 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4236 code in os-type was giving problems when libc.so lives in lib64, like on
4239 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4240 aren't the modern standard, and it seems that some systems' include files
4241 don't always have them. Exim was already checking for some of the newer
4242 ones like T_AAAA, and defining it itself. I've added checks for all the
4243 record types that Exim uses.
4245 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4246 not automatically generating a new one, as it is supposed to. This
4247 prevented TLS from working. If the file did exist, but contained invalid
4248 data, a new version was generated, as expected. It was only the case of a
4249 non-existent file that was broken.
4251 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4252 with a change in libdomainkeys > 0.64.
4254 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4255 from DNS. If the selector record carries the flag, it now has
4256 precedence over the domain-wide flag.
4258 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4260 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4261 the use of a port name that isn't defined in /etc/services) occurred, the
4262 message was deferred as in a normal delivery, and thus remained on the
4263 spool, instead of being failed because of the mua_wrapper setting. This
4264 is now fixed, and I tidied up some of the mua_wrapper messages at the
4267 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4268 the messages in a hash of arrays rather than using individual hashes.
4269 This is a bit cleaner and results in dramatic memory savings, albeit
4270 at a slight CPU cost.
4272 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4273 as requested by Marc Sherman.
4275 SC/10 Eximstats: added histograms for user specified patterns as requested
4278 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4280 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4281 fopen() in the content-scanning modules that did not already have it.
4287 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4288 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4290 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4292 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4294 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4295 to test Sieve filters that use "vacation".
4297 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4298 that changes the way the GnuTLS parameters are stored in the cache file.
4299 The new format can be generated externally. For backward compatibility,
4300 if the data in the cache doesn't make sense, Exim assumes it has read an
4301 old-format file, and it generates new data and writes a new file. This
4302 means that you can't go back to an older release without removing the
4305 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4306 work if there are any delivery delays because "one_time" forces the
4307 parent to be marked "delivered", so its unseen clone is never tried
4308 again. For this reason, Exim now forbids the simultaneous setting of
4311 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4312 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4313 entry if you want to know the details. The fix, however, neglected to
4314 consider the case when local delivery batching is involved. The test for
4315 "previously delivered" was not happening when checking to see if an
4316 address could be batched with a previous (undelivered) one; under
4317 certain circumstances this could lead to multiple deliveries to the same
4320 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4321 in its include files, and this causes problems building Exim.
4323 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4324 header_syntax) but Exim was just ignoring anything given after a slash.
4325 In particular, this caused confusion with an attempt to use "verify =
4326 reverse_host_lookup/defer_ok". An error is now given when options are
4327 supplied for verify items that do not have them. (Maybe reverse_host_
4328 lookup should have a defer_ok option, but that's a different point.)
4330 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4331 defined by RFC 821) to 2048, because there were problems with some AUTH
4332 commands, and RFC 1869 says the size should be increased for extended
4333 SMTP commands that take arguments.
4335 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4338 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4339 "unknown" error; now it says that the functionality isn't in the binary.
4341 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4342 an address' error message when a string expansion fails (syntax or
4343 whatever). Otherwise the password may appear in the log. Following change
4344 PH/42 below, there is no longer a chance of it appearing in a bounce
4347 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4349 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4350 of its addresses was ever tried. (Bugzilla bug #2.)
4352 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4353 the result incorrectly in the debug output. (It correctly added a newline
4354 to what was transported.)
4356 TF/01 Added $received_time.
4358 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4359 commented out examples of how to interface to a virus scanner and to
4360 SpamAssassin. Also added commented examples of av_scanner and
4361 spamd_address settings.
4363 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4364 and controls are allowed in which ACLs. There were a couple of minor
4365 errors. Some of the entries in the conditions table (which is a table of
4366 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4367 negation of where the condition IS allowed.
4369 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4371 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4372 header file does not have a version number, so I've had to invent a new
4373 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4374 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4375 radiusclient), but it was contributed by a Radius user.
4377 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4378 files or directories, for OpenSSL.
4380 PH/19 When an Exim process that is running as root has to create an Exim log
4381 file, it does so in a subprocess that runs as exim:exim so as to get the
4382 ownership right at creation (otherwise, other Exim processes might see
4383 the file with the wrong ownership). There was no test for failure of this
4384 fork() call, which would lead to the process getting stuck as it waited
4385 for a non-existent subprocess. Forks do occasionally fail when resources
4386 run out. I reviewed all the other calls to fork(); they all seem to check
4389 PH/20 When checking for unexpected SMTP input at connect time (before writing
4390 the banner), Exim was not dealing correctly with a non-positive return
4391 from the read() function. If the client had disconnected by this time,
4392 the result was a log entry for a synchronization error with an empty
4393 string after "input=" when read() returned zero. If read() returned -1
4394 (an event I could not check), uninitialized data bytes were printed.
4395 There were reports of junk text (parts of files, etc) appearing after
4398 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4400 PH/22 Added support for macro redefinition, and (re)definition in between
4401 driver and ACL definitions.
4403 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4404 forgetting to use the resulting value; it was using the unexpanded value.
4406 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4407 hadn't been configured. The fix is from Juergen Kreileder, who
4408 understands it better than I do:
4410 "Here's what I see happening with three configured cyrus_sasl
4411 authenticators configured (plain, login, cram-md5):
4413 On startup auth_cyrus_sasl_init() gets called for each of these.
4414 This means three calls to sasl_listmech() without a specified mech_list.
4415 => SASL tests which mechs of all available mechs actually work
4416 => three warnings about OTP not working
4417 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4419 With the patch, sasl_listmech() also gets called three times. But now
4420 SASL's mech_list option is set to the server_mech specified in the the
4421 authenticator. Or in other words, the answer from sasl_listmech()
4422 gets limited to just the mech you're testing for (which is different
4424 => the return list contains just 'plain' or 'login', 'cram-md5' or
4425 nothing depending on the value of ob->server_mech.
4427 I've just tested the patch: Authentication still works fine,
4428 unavailable mechs specified in the exim configuration are still
4429 caught, and the auth.log warnings about OTP are gone."
4431 PH/25 When debugging is enabled, the contents of the command line are added
4432 to the debugging output, even when log_selector=+arguments is not
4435 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4436 answer is "GNU", and only if the return is "GNU/something" is the answer
4439 PH/27 $acl_verify_message is now set immediately after the failure of a
4440 verification in an ACL, and so is available in subsequent modifiers. In
4441 particular, the message can be preserved by coding like this:
4443 warn !verify = sender
4444 set acl_m0 = $acl_verify_message
4446 Previously, $acl_verify_message was set only while expanding "message"
4447 and "log_message" when a very denied access.
4449 PH/28 Modified OS/os.c-Linux with
4451 -#ifndef OS_LOAD_AVERAGE
4452 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4454 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4455 nomenclature these days.)
4457 PH/29 Installed patch from the Sieve maintainer that adds the options
4458 sieve_useraddress and sieve_subaddress to the redirect router.
4460 PH/30 In these circumstances:
4461 . Two addresses routed to the same list of hosts;
4462 . First host does not offer TLS;
4463 . First host accepts first address;
4464 . First host gives temporary error to second address;
4465 . Second host offers TLS and a TLS session is established;
4466 . Second host accepts second address.
4467 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4468 and peerdn, if requested) that were in fact used only for the second
4471 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4472 attention to any local part prefix or suffix that was matched by the
4473 router that accepted the address. It now behaves in the same way as it
4474 does for delivery: the affixes are removed from the local part unless
4475 rcpt_include_affixes is set on the transport.
4477 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4478 timeout during the DATA phase of an incoming message.
4480 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4481 applied a patch sanctioned by the Sieve maintainer.
4483 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4484 the uid or gid is negative. A case of a negative gid caused this to be
4485 noticed. The fix allows for either to be negative.
4487 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4488 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4491 PH/36 The change PH/12 above was broken. Fixed it.
4493 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4494 the grounds that routing the same address twice would always produce the
4495 same answer. This might have been true once, but it is certainly no
4496 longer true now. Routing a child address may depend on the previous
4497 routing that produced that child. Some complicated redirection strategies
4498 went wrong when messages had multiple recipients, and made Exim's
4499 behaviour dependent on the order in which the addresses were given.
4501 I have moved the duplicate checking until after the routing is complete.
4502 Exim scans the addresses that are assigned to local and remote
4503 transports, and removes any duplicates. This means that more work will be
4504 done, as duplicates will always all be routed, but duplicates are
4505 presumably rare, so I don't expect this is of any significance.
4507 For deliveries to pipes, files, and autoreplies, the duplicate checking
4508 still happens during the routing process, since they are not going to be
4511 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4512 It corrects a timeout issue with spamd. This is Ian's comment: "The
4513 background is that sometimes spamd either never reads data from a
4514 connection it has accepted, or it never writes response data. The exiscan
4515 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4516 blindly assumes that writes won't block so it may never time out."
4518 PH/39 Allow G after quota size as well as K and M.
4520 PH/40 The value set for $authenticated_id in an authenticator may not contain
4521 binary zeroes or newlines because the value is written to log lines and
4522 to spool files. There was no check on this. Now the value is run through
4523 the string_printing() function so that such characters are converted to
4524 printable escape sequences.
4526 PH/41 $message_linecount is a new variable that contains the total number of
4527 lines in the message. Compare $body_linecount, which is the count for the
4530 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4531 bounce and delay warning messages, except in certain special cases, which
4534 (a) An SMTP error message from a remote host;
4535 (b) A message specified in a :fail: redirection;
4536 (c) A message specified in a "fail" command in a system filter;
4537 (d) A message specified in a FAIL return from the queryprogram router;
4538 (e) A message specified by the cannot_route_message router option.
4540 In these cases only, Exim does include the error details in bounce and
4541 warning messages. There are also a few cases where bland messages such
4542 as "unrouteable address" or "local delivery error" are given.
4544 PH/43 $value is now also set for the "else" part of a ${run expansion.
4546 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4547 being worked on, but at least Exim now implements the latest version to
4550 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4551 process to complete was treated as a delivery failure, a timeout while
4552 writing the message to the pipe was logged, but erroneously treated as a
4553 successful delivery. Such timeouts include transport filter timeouts. For
4554 consistency with the overall process timeout, these timeouts are now
4555 treated as errors, giving rise to delivery failures by default. However,
4556 there is now a new Boolean option for the pipe transport called
4557 timeout_defer, which, if set TRUE, converts the failures into defers for
4558 both kinds of timeout. A transport filter timeout is now identified in
4561 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4562 systems where "make" and "gmake" are different, calling "gmake" at top
4563 level broke things. I've arranged for the value of $(MAKE) to be passed
4564 from the Makefile to this script so that it can call the same version of
4568 A note about Exim versions 4.44 and 4.50
4569 ----------------------------------------
4571 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4572 changes of various kinds. As a consequence, a big documentation update was
4573 needed. This delayed the release for rather longer than seemed good, especially
4574 in the light of a couple of (minor) security issues. Therefore, the changes
4575 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4576 release. So 4.44 and 4.50 are in effect two different branches that both start
4579 I have left the 4.50 change log unchanged; it contains all the changes since
4580 4.43. The change log for 4.44 is below; many of its items are identical to
4581 those for 4.50. This seems to be the most sensible way to preserve the
4582 historical information.
4588 1. Minor wording change to the doc/README.SIEVE file.
4590 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4591 computation of the current number of files was incorrect.
4593 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4594 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4597 4. Give more explanation in the error message when the command for a transport
4598 filter fails to execute.
4600 5. There are several places where Exim runs a non-Exim command in a
4601 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4602 was being done only for the command run by the queryprogram router. It is
4603 now done for all such subprocesses. The other cases are: ${run, transport
4604 filters, and the commands run by the lmtp and pipe transports.
4606 6. Added CONFIGURE_GROUP build-time option.
4608 7. Some older OS have a limit of 256 on the maximum number of file
4609 descriptors. Exim was using setrlimit() to set 1000 as a large value
4610 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4611 systems. I've change it so that if it can't get 1000, it tries for 256.
4613 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4614 was an oversight, and furthermore, ever since the addition of extra
4615 controls (e.g. 4.43/32), the checks on when to allow different forms of
4616 "control" were broken. There should now be diagnostics for all cases when a
4617 control that does not make sense is encountered.
4619 9. Added the /retain_sender option to "control=submission".
4621 10. $recipients is now available in the predata ACL (oversight).
4623 11. Tidy the search cache before the fork to do a delivery from a message
4624 received from the command line. Otherwise the child will trigger a lookup
4625 failure and thereby defer the delivery if it tries to use (for example) a
4626 cached ldap connection that the parent has called unbind on.
4628 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4629 of $address_data from the recipient verification was clobbered by the
4630 sender verification.
4632 13. The value of address_data from a sender verification is now available in
4633 $sender_address_data in subsequent conditions in the ACL statement.
4635 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4637 15. Added a new option "connect=<time>" to callout options, to set a different
4640 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4641 was its contents. (It was OK if the option was not defined at all.)
4643 17. A "Completed" log line is now written for messages that are removed from
4644 the spool by the -Mrm option.
4646 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4647 information about exactly what failed.
4649 19. Added -dd to debug only the daemon process.
4651 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4652 handles timeouts, both on the server side and network timeouts. Renamed the
4653 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4655 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4656 It is now set to "smtps".
4658 22. $host_address is now set to the target address during the checking of
4659 ignore_target_hosts.
4661 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4662 being passed; this would have caused $sender_host_name to have been used if
4663 matching the list had actually called for a host name (not very likely,
4664 since this list is usually IP addresses). A host name is now passed as
4667 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4668 code that specifies a non-restarting handler (typically sigaction() in
4669 modern systems) in an attempt to fix a rare and obscure crash bug.
4671 25. Narrowed the window for a race in the daemon that could cause it to ignore
4672 SIGCHLD signals. This is not a major problem, because they are used only to
4673 wake it up if nothing else does.
4675 26. A malformed maildirsize file could cause Exim to calculate negative values
4676 for the mailbox size or file count. Odd effects could occur as a result.
4677 The maildirsize information is now recalculated if the size or filecount
4680 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4681 support for a long time. Removed HAVE_SYS_VFS_H.
4683 28. Installed the latest version of exipick from John Jetmore.
4685 29. In an address list, if the pattern was not a regular expression, an empty
4686 subject address (from a bounce message) matched only if the pattern was an
4687 empty string. Non-empty patterns were not even tested. This was the wrong
4688 because it is perfectly reasonable to use an empty address as part of a
4689 database query. An empty address is now tested by patterns that are
4690 lookups. However, all the other forms of pattern expect the subject to
4691 contain a local part and a domain, and therefore, for them, an empty
4692 address still always fails if the pattern is not itself empty.
4694 30. Exim went into a mad DNS loop when attempting to do a callout where the
4695 host was specified on an smtp transport, and looking it up yielded more
4696 than one IP address.
4698 31. Re-factored the code for checking spool and log partition space into a
4699 function that finds that data and another that does the check. The former
4700 is then used to implement four new variables: $spool_space, $log_space,
4701 $spool_inodes, and $log_inodes.
4703 32. The RFC2047 encoding function was originally intended for short strings
4704 such as real names; it was not keeping to the 75-character limit for
4705 encoded words that the RFC imposes. It now respects the limit, and
4706 generates multiple encoded words if necessary. To be on the safe side, I
4707 have increased the buffer size for the ${rfc2047: expansion operator from
4710 33. It is now permitted to omit both strings after an "if" condition; if the
4711 condition is true, the result is "true". As before, when the second string
4712 is omitted, a false condition yields an empty string. This makes it less
4713 cumbersome to write custom ACL and router conditions.
4715 34. Failure to deliver a bounce message always caused it to be frozen, even if
4716 there was an errors_to setting on the router. The errors_to setting is now
4719 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4720 canonical form (fully expanded) before being placed in
4721 $sender_host_address.
4723 36. The table in the code that translates DNS record types into text (T_A to
4724 "A" for instance) was missing entries for NS and CNAME. It is just possible
4725 that this could have caused confusion if both these types were looked up
4726 for the same domain, because the text type is used as part of Exim's
4727 per-process caching. But the chance of anyone hitting this buglet seems
4730 37. The dnsdb lookup has been extended in a number of ways.
4732 (1) There is a new type, "zns", which walks up the domain tree until it
4733 finds some nameserver records. It should be used with care.
4735 (2) There is a new type, "mxh", which is like "mx" except that it returns
4736 just the host names, not the priorities.
4738 (3) It is now possible to give a list of domains (or IP addresses) to be
4739 looked up. The behaviour when one of the lookups defers can be
4740 controlled by a keyword.
4742 (4) It is now possible to specify the separator character for use when
4743 multiple records are returned.
4745 38. The dnslists ACL condition has been extended: it is now possible to supply
4746 a list of IP addresses and/or domains to be looked up in a particular DNS
4749 39. Added log_selector=+queue_time_overall.
4751 40. When running the queue in the test harness, wait just a tad after forking a
4752 delivery process, to get repeatability of debugging output.
4754 41. Include certificate and key file names in error message when GnuTLS fails
4755 to set them up, because the GnuTLS error message doesn't include the name
4756 of the failing file when there is a problem reading it.
4758 42. Allow both -bf and -bF in the same test run.
4760 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4762 44. The "Exiscan patch" is now merged into the mainline Exim source.
4764 45. Sometimes the final signoff response after QUIT could fail to get
4765 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4766 < 0 before doing a fflush(). This bug looks as though it goes back to the
4767 introduction of TLS in release 3.20, but "sometimes" must have been rare
4768 because the tests only now provoked it.
4770 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4771 (this can affect the format of dates).
4773 47. exim_tidydb, when checking for the continued existence of a message for
4774 which it has found a message-specific retry record, was not finding
4775 messages that were in split spool directories. Consequently, it was
4776 deleting retry records that should have stayed in existence.
4778 48. Steve fixed some bugs in eximstats.
4780 49. The SPA authentication driver was not abandoning authentication and moving
4781 on to the next authenticator when an expansion was forced to fail,
4782 contradicting the general specification for all authenticators. Instead it
4783 was generating a temporary error. It now behaves as specified.
4785 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4786 (the order specifies the preference for clients). The order is now AES256,
4787 AES128, 3DES, ARCFOUR128.
4789 51. Small patch to Sieve code - explicitly set From: when generating an
4792 52. Exim crashed if a remote delivery caused a very long error message to be
4793 recorded - for instance if somebody sent an entire SpamAssassin report back
4794 as a large number of 550 error lines. This bug was coincidentally fixed by
4795 increasing the size of one of Exim's internal buffers (big_buffer) that
4796 happened as part of the Exiscan merge. However, to be on the safe side, I
4797 have made the code more robust (and fixed the comments that describe what
4800 53. Now that there can be additional text after "Completed" in log lines (if
4801 the queue_time_overall log selector is set), a one-byte patch to exigrep
4802 was needed to allow it to recognize "Completed" as not the last thing in
4805 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4806 patch that reportedly fixes this has been added. I am not expert enough to
4807 create a test for it. This is what the patch creator wrote:
4809 "I found a little strange behaviour of ldap code when working with
4810 Windows 2003 AD Domain, where users was placed in more than one
4811 Organization Units. When I tried to give exim partial DN, the exit code
4812 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4813 But simultaneously result of request was absolutely normal ldap result,
4814 so I produce this patch..."
4816 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4817 REFERENCE, so I have modified the code to exclude the patch when that macro
4820 55. Some experimental protocols are using DNS PTR records for new purposes. The
4821 keys for these records are domain names, not reversed IP addresses. The
4822 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4823 leaves it alone. Component reversal etc. now happens only for IP addresses.
4826 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4828 57. Double the size of the debug message buffer (to 2048) so that more of very
4829 long debug lines gets shown.
4831 58. The exicyclog utility now does better if the number of log files to keep
4832 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4834 59. Two changes related to the smtp_active_hostname option:
4836 (1) $smtp_active_hostname is now available as a variable.
4837 (2) The default for smtp_banner uses $smtp_active_hostname instead
4838 of $primary_hostname.
4840 60. The host_aton() function is supposed to be passed a string that is known
4841 to be a valid IP address. However, in the case of IPv6 addresses, it was
4842 not checking this. This is a hostage to fortune. Exim now panics and dies
4843 if the condition is not met. A case was found where this could be provoked
4844 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4845 components; fortuitously, this particular loophole had already been fixed
4846 by change 4.50/55 above.
4848 If there are any other similar loopholes, the new check in host_aton()
4849 itself should stop them being exploited. The report I received stated that
4850 data on the command line could provoke the exploit when Exim was running as
4851 exim, but did not say which command line option was involved. All I could
4852 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4853 running as the user.
4856 61. There was a buffer overflow vulnerability in the SPA authentication code
4857 (which came originally from the Samba project). I have added a test to the
4858 spa_base64_to_bits() function which I hope fixes it.
4861 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4862 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4864 63. The daemon start-up calls getloadavg() while still root for those OS that
4865 need the first call to be done as root, but it missed one case: when
4866 deliver_queue_load_max is set with deliver_drop_privilege. This is
4867 necessary for the benefit of the queue runner, because there is no re-exec
4868 when deliver_drop_privilege is set.
4870 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4871 This has been fixed.
4873 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4874 was in use, was not putting the data itself into the right store pool;
4875 consequently, it could be overwritten for a subsequent message in the same
4876 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4879 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4881 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4882 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4883 the function were treating the return as a boolean value, which happened to
4884 work because 0=false and not-0=true, but is not correct code.
4886 68. The host_aton() function was not handling scoped IPv6 addresses (those
4887 with, for example, "%eth0" on the end) correctly.
4889 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4890 negated items (that is, ~something) in unsigned ints. Some compilers
4891 apparently mutter when there is no cast.
4893 70. If an address verification called from an ACL failed, and did not produce a
4894 user-specific message (i.e. there was only a "system" message), nothing was
4895 put in $acl_verify_message. In this situation, it now puts the system
4898 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4899 session; change 4.31/43 added the unwanted input to the log line - except
4900 that it did not do this in the start of session case. It now does.
4902 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4903 This is wrong and can cause the other end to generate a synchronization
4904 error if it is another Exim or anything else that does the synchronization
4905 check. A QUIT command is no longer sent after a timeout.
4907 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4908 during host lookups.
4910 74. The defer_ok option of callout verification was not working if it was used
4911 when verifying addresses in header lines, that is, for this case:
4913 verify = header_sender/callout=defer_ok
4915 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4916 those file descriptors could be used for SMTP connections. If anything
4917 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4918 could be sent to the SMTP client, causing chaos. The daemon now opens
4919 stdin, stdout, and stderr to /dev/null when it puts itself into the
4922 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4923 log by default. The user can override this with suitable Perl magic.
4925 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4926 the log message when discard triggers, was not working for the DATA ACL or
4927 for the non-SMTP ACL.
4929 78. Error message wording change in sieve.c.
4931 79. If smtp_accept_max_per_host was set, the number of connections could be
4932 restricted to fewer than expected, because the daemon was trying to set up
4933 a new connection before checking whether the processes handling previous
4934 connections had finished. The check for completed processes is now done
4935 earlier. On busy systems, this bug wouldn't be noticed because something
4936 else would have woken the daemon, and it would have reaped the completed
4939 80. If a message was submitted locally by a user whose login name contained one
4940 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4941 It caused a spool format error. I have fixed the spool reading code. A
4942 related problem was that the "from" clause in the Received: line became
4943 illegal because of the space(s). It is now covered by ${quote_local_part.
4945 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4948 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4950 83. Patch from Sieve maintainer to fix unterminated string problem in
4951 "vacation" handling.
4953 84. Some minor changes to the Linux configuration files to help with other
4954 OS variants using glibc.
4956 85. One more patch for Sieve to update vacation handling to latest spec.
4959 ----------------------------------------------------
4960 See the note above about the 4.44 and 4.50 releases.
4961 ----------------------------------------------------
4967 1. Change 4.43/35 introduced a bug that caused file counts to be
4968 incorrectly computed when quota_filecount was set in an appendfile
4971 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4972 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4975 3. Give more explanation in the error message when the command for a transport
4976 filter fails to execute.
4978 4. There are several places where Exim runs a non-Exim command in a
4979 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4980 was being done only for the command run by the queryprogram router. It is
4981 now done for all such subprocesses. The other cases are: ${run, transport
4982 filters, and the commands run by the lmtp and pipe transports.
4984 5. Some older OS have a limit of 256 on the maximum number of file
4985 descriptors. Exim was using setrlimit() to set 1000 as a large value
4986 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4987 systems. I've change it so that if it can't get 1000, it tries for 256.
4989 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4990 was an oversight, and furthermore, ever since the addition of extra
4991 controls (e.g. 4.43/32), the checks on when to allow different forms of
4992 "control" were broken. There should now be diagnostics for all cases when a
4993 control that does not make sense is encountered.
4995 7. $recipients is now available in the predata ACL (oversight).
4997 8. Tidy the search cache before the fork to do a delivery from a message
4998 received from the command line. Otherwise the child will trigger a lookup
4999 failure and thereby defer the delivery if it tries to use (for example) a
5000 cached ldap connection that the parent has called unbind on.
5002 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5003 of $address_data from the recipient verification was clobbered by the
5004 sender verification.
5006 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5007 was its contents. (It was OK if the option was not defined at all.)
5009 11. A "Completed" log line is now written for messages that are removed from
5010 the spool by the -Mrm option.
5012 12. $host_address is now set to the target address during the checking of
5013 ignore_target_hosts.
5015 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5016 being passed; this would have caused $sender_host_name to have been used if
5017 matching the list had actually called for a host name (not very likely,
5018 since this list is usually IP addresses). A host name is now passed as
5021 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5022 code that specifies a non-restarting handler (typically sigaction() in
5023 modern systems) in an attempt to fix a rare and obscure crash bug.
5025 15. Narrowed the window for a race in the daemon that could cause it to ignore
5026 SIGCHLD signals. This is not a major problem, because they are used only to
5027 wake it up if nothing else does.
5029 16. A malformed maildirsize file could cause Exim to calculate negative values
5030 for the mailbox size or file count. Odd effects could occur as a result.
5031 The maildirsize information is now recalculated if the size or filecount
5034 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5035 support for a long time. Removed HAVE_SYS_VFS_H.
5037 18. Updated exipick to current release from John Jetmore.
5039 19. Allow an empty sender to be matched against a lookup in an address list.
5040 Previously the only cases considered were a regular expression, or an
5043 20. Exim went into a mad DNS lookup loop when doing a callout where the
5044 host was specified on the transport, if the DNS lookup yielded more than
5047 21. The RFC2047 encoding function was originally intended for short strings
5048 such as real names; it was not keeping to the 75-character limit for
5049 encoded words that the RFC imposes. It now respects the limit, and
5050 generates multiple encoded words if necessary. To be on the safe side, I
5051 have increased the buffer size for the ${rfc2047: expansion operator from
5054 22. Failure to deliver a bounce message always caused it to be frozen, even if
5055 there was an errors_to setting on the router. The errors_to setting is now
5058 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5059 canonical form (fully expanded) before being placed in
5060 $sender_host_address.
5062 24. Updated eximstats to version 1.33
5064 25. Include certificate and key file names in error message when GnuTLS fails
5065 to set them up, because the GnuTLS error message doesn't include the name
5066 of the failing file when there is a problem reading it.
5068 26. Expand error message when OpenSSL has problems setting up cert/key files.
5071 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5072 (this can affect the format of dates).
5074 28. exim_tidydb, when checking for the continued existence of a message for
5075 which it has found a message-specific retry record, was not finding
5076 messages that were in split spool directories. Consequently, it was
5077 deleting retry records that should have stayed in existence.
5079 29. eximstats updated to version 1.35
5080 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5081 1.35 - bugfix such that pie charts by volume are generated correctly
5083 30. The SPA authentication driver was not abandoning authentication and moving
5084 on to the next authenticator when an expansion was forced to fail,
5085 contradicting the general specification for all authenticators. Instead it
5086 was generating a temporary error. It now behaves as specified.
5088 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5089 (the order specifies the preference for clients). The order is now AES256,
5090 AES128, 3DES, ARCFOUR128.
5092 31. Small patch to Sieve code - explicitly set From: when generating an
5095 32. Exim crashed if a remote delivery caused a very long error message to be
5096 recorded - for instance if somebody sent an entire SpamAssassin report back
5097 as a large number of 550 error lines. This bug was coincidentally fixed by
5098 increasing the size of one of Exim's internal buffers (big_buffer) that
5099 happened as part of the Exiscan merge. However, to be on the safe side, I
5100 have made the code more robust (and fixed the comments that describe what
5103 33. Some experimental protocols are using DNS PTR records for new purposes. The
5104 keys for these records are domain names, not reversed IP addresses. The
5105 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5106 leaves it alone. Component reversal etc. now happens only for IP addresses.
5109 34. The host_aton() function is supposed to be passed a string that is known
5110 to be a valid IP address. However, in the case of IPv6 addresses, it was
5111 not checking this. This is a hostage to fortune. Exim now panics and dies
5112 if the condition is not met. A case was found where this could be provoked
5113 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5114 components; fortuitously, this particular loophole had already been fixed
5115 by change 4.50/55 or 4.44/33 above.
5117 If there are any other similar loopholes, the new check in host_aton()
5118 itself should stop them being exploited. The report I received stated that
5119 data on the command line could provoke the exploit when Exim was running as
5120 exim, but did not say which command line option was involved. All I could
5121 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5122 running as the user.
5125 35. There was a buffer overflow vulnerability in the SPA authentication code
5126 (which came originally from the Samba project). I have added a test to the
5127 spa_base64_to_bits() function which I hope fixes it.
5130 36. The daemon start-up calls getloadavg() while still root for those OS that
5131 need the first call to be done as root, but it missed one case: when
5132 deliver_queue_load_max is set with deliver_drop_privilege. This is
5133 necessary for the benefit of the queue runner, because there is no re-exec
5134 when deliver_drop_privilege is set.
5136 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5137 was in use, was not putting the data itself into the right store pool;
5138 consequently, it could be overwritten for a subsequent message in the same
5139 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5142 38. Sometimes the final signoff response after QUIT could fail to get
5143 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5144 < 0 before doing a fflush(). This bug looks as though it goes back to the
5145 introduction of TLS in release 3.20, but "sometimes" must have been rare
5146 because the tests only now provoked it.
5152 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5153 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5154 Now it returns an integer. A number of calls were still expecting a T/F
5155 return. Fortuitously, in all cases, the tests worked in OK situations,
5156 which is the norm. However, things would have gone wrong on any write
5157 failures on the smtp file descriptor. This function is used when sending
5158 messages over SMTP and also when doing verify callouts.
5160 2. When Exim is called to do synchronous delivery of a locally submitted
5161 message (the -odf or -odi options), it no longer closes stderr before doing
5164 3. Implemented the mua_wrapper option.
5166 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5168 5. Implemented the functions header_remove(), header_testname(),
5169 header_add_at_position(), and receive_remove_recipient(), and exported them
5172 6. If an ACL "warn" statement specified the addition of headers, Exim already
5173 inserted X-ACL-Warn: at the start if there was no header name. However, it
5174 was not making this test for the second and subsequent header lines if
5175 there were newlines in the string. This meant that an invalid header could
5176 be inserted if Exim was badly configured.
5178 7. Allow an ACL "warn" statement to add header lines at the start or after all
5179 the Received: headers, as well as at the end.
5181 8. Added the rcpt_4xx retry error code.
5183 9. Added postmaster_mailfrom=xxx to callout verification option.
5185 10. Added mailfrom=xxxx to the callout verification option, for verify=
5188 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5189 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5191 12. Inserted some casts to stop certain compilers warning when using pointer
5192 differences as field lengths or precisions in printf-type calls (mostly
5193 affecting debugging statements).
5195 13. Added optional readline() support for -be (dynamically loaded).
5197 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5198 same clock tick as a message's arrival, so that its received time was the
5199 same as the "first fail" time on the retry record, and that message
5200 remained on the queue past the ultimate address timeout, every queue runner
5201 would try a delivery (because it was past the ultimate address timeout) but
5202 after another failure, the ultimate address timeout, which should have then
5203 bounced the address, did not kick in. This was a "< instead of <=" error;
5204 in most cases the first failure would have been in the next clock tick
5205 after the received time, and all would be well.
5207 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5208 being recognized when the domain list was tested by the match_domain
5209 condition in an expansion string.
5211 16. Added the ${str2b64: operator.
5213 17. Exim was always calling setrlimit() to set a large limit for the number of
5214 processes, without checking whether the existing limit was already
5215 adequate. (It did check for the limit on file descriptors.) Furthermore,
5216 errors from getrlimit() and setrlimit() were being ignored. Now they are
5217 logged to the main and panic logs, but Exim does carry on, to try to do its
5218 job under whatever limits there are.
5220 18. Imported PCRE 5.0.
5222 19. Trivial typo in log message " temporarily refused connection" (the leading
5225 20. If the log selector return_path_on_delivery was set and an address was
5226 redirected to /dev/null, the delivery process crashed because it assumed
5227 that a return path would always be set for a "successful" delivery. In this
5228 case, the whole delivery is bypassed as an optimization, and therefore no
5231 21. Internal re-arrangement: the function for sending a challenge and reading
5232 a response while authentication was assuming a zero-terminated challenge
5233 string. It's now changed to take a pointer and a length, to allow for
5234 binary data in such strings.
5236 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5238 23. Exim was not respecting finduser_retries when seeking the login of the
5239 uid under which it was called; it was always trying 10 times. (The default
5240 setting of finduser_retries is zero.) Also, it was sleeping after the final
5241 failure, which is pointless.
5243 24. Implemented tls_on_connect_ports.
5245 25. Implemented acl_smtp_predata.
5247 26. If the domain in control=submission is set empty, Exim assumes that the
5248 authenticated id is a complete email address when it generates From: or
5249 Sender: header lines.
5251 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5252 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5253 chown and chgrp in /bin and hostname in /usr/bin.
5255 28. Exim was keeping the "process log" file open after each use, just as it
5256 does for the main log. This opens the possibility of it remaining open for
5257 long periods when the USR1 signal hits a daemon. Occasional processlog
5258 errors were reported, that could have been caused by this. Anyway, it seems
5259 much more sensible not to leave this file open at all, so that is what now
5262 29. The long-running daemon process does not normally write to the log once it
5263 has entered its main loop, and it closes the log before doing so. This is
5264 so that log files can straightforwardly be renamed and moved. However,
5265 there are a couple of unusual error situations where the daemon does write
5266 log entries, and I had neglected to close the log afterwards.
5268 30. The text of an SMTP error response that was received during a remote
5269 delivery was being truncated at 512 bytes. This is too short for some of
5270 the long messages that one sometimes sees. I've increased the limit to
5273 31. It is now possible to make retry rules that apply only when a message has a
5274 specific sender, in particular, an empty sender.
5276 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5277 it possible to be selective about when SMTP synchronization is enforced.
5279 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5281 32. Implemented hosts_connection_nolog.
5283 33. Added an ACL for QUIT.
5285 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5288 35. Added mailbox_size and mailbox_filecount to appendfile.
5290 36. Added control = no_multiline_responses to ACLs.
5292 37. There was a bug in the logic of the code that waits for the clock to tick
5293 in the case where the clock went backwards by a substantial amount such
5294 that the microsecond fraction of "now" was more than the microsecond
5295 fraction of "then" (but the whole seconds number was less).
5297 38. Added support for the libradius Radius client library this is found on
5298 FreeBSD (previously only the radiusclient library was supported).
5304 1. When certain lookups returned multiple values in the form name=value, the
5305 quoting of the values was not always being done properly. Specifically:
5306 (a) If the value started with a double quote, but contained no whitespace,
5308 (b) If the value contained whitespace other than a space character (i.e.
5309 tabs or newlines or carriage returns) it was not quoted.
5310 This fix has been applied to the mysql and pgsql lookups by writing a
5311 separate quoting function and calling it from the lookup code. The fix
5312 should probably also be applied to nisplus, ibase and oracle lookups, but
5313 since I cannot test any of those, I have not disturbed their existing code.
5315 2. A hit in the callout cache for a specific address caused a log line with no
5316 reason for rejecting RCPT. Now it says "Previous (cached) callout
5317 verification failure".
5319 3. There was an off-by-one bug in the queryprogram router. An over-long
5320 return line was truncated at 256 instead of 255 characters, thereby
5321 overflowing its buffer with the terminating zero. As well as fixing this, I
5322 have increased the buffer size to 1024 (and made a note to document this).
5324 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5325 when Exim is waiting for an SMTP response from a remote server, Exim
5326 restarts its select() call on the socket, thereby resetting its timeout.
5327 This is not a problem when such interrupts are rare. Somebody set up a cron
5328 job to run exiwhat every 2 minutes, which is less than the normal select()
5329 timeout (5 or 10 minutes). This meant that the select() timeout never
5330 kicked in because it was always reset. I have fixed this by comparing the
5331 time when an interrupt arrives with the time at the start of the first call
5332 to select(). If more time than the timeout has elapsed, the interrupt is
5333 treated as a timeout.
5335 5. Some internal re-factoring in preparation for the addition of Sieve
5336 extensions (by MH). In particular, the "personal" test is moved to a
5337 separate function, and given an option for scanning Cc: and Bcc: (which is
5338 not set for Exim filters).
5340 6. When Exim created an email address using the login of the caller as the
5341 local part (e.g. when creating a From: or Sender: header line), it was not
5342 quoting the local part when it contained special characters such as @.
5344 7. Installed new OpenBSD configuration files.
5346 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5347 try to make them clearer.
5349 9. Callout options, other than the timeout value, were being ignored when
5350 verifying sender addresses in header lines. For example, when using
5352 verify = header_sender/callout=no_cache
5354 the cache was (incorrectly) being used.
5356 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5357 only the Cygwin environment.
5359 11. When return_path_on_delivery was set as a log selector, if different remote
5360 addresses in the same message used different return paths and parallel
5361 remote delivery occurred, the wrong values would sometimes be logged.
5362 (Whenever a remote delivery process finished, the return path value from
5363 the most recently started remote delivery process was logged.)
5365 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5366 lines when AUTH and/or TLS are in use. This is the "received protocol"
5367 field. Exim used to use "asmtp" for authenticated SMTP, without any
5368 indication (in the protocol name) for TLS use. Now it follows the RFC and
5369 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5370 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5371 names appear in log lines as well as in Received: header lines.
5373 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5374 extensions, and comparison tests, and to fix some bugs.
5376 14. Changes to the "personal" filter test:
5378 (1) The test was buggy in that it was just doing the equivalent of
5379 "contains" tests on header lines. For example, if a user's address was
5380 anne@some.where, the "personal" test would incorrectly be true for
5382 To: susanne@some.where
5384 This test is now done by extracting each address from the header in turn,
5385 and checking the entire address. Other tests that are part of "personal"
5386 are now done using regular expressions (for example, to check local parts
5387 of addresses in From: header lines).
5389 (2) The list of non-personal local parts in From: addresses has been
5390 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5391 taken from the Sieve specification recommendations.
5393 (3) If the message contains any header line starting with "List-" it is
5394 treated as non-personal.
5396 (4) The test for "circular" in the Subject: header line has been removed
5397 because it now seems ill-conceived.
5399 15. Minor typos in src/EDITME comments corrected.
5401 16. Installed latest exipick from John Jetmore.
5403 17. If headers_add on a router specified a text string that was too long for
5404 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5405 of string_sprintf() is now avoided.
5407 18. $message_body_size was not set (it was always zero) when running the DATA
5408 ACL and the local_scan() function.
5410 19. For the "mail" command in an Exim filter, no default was being set for
5411 the once_repeat time, causing a random time value to be used if "once" was
5412 specified. (If the value happened to be <= 0, no repeat happened.) The
5413 default is now 0s, meaning "never repeat". The "vacation" command was OK
5414 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5415 (I found it when inspecting the code).
5417 20. There is now an overall timeout for performing a callout verification. It
5418 defaults to 4 times the callout timeout, which applies to individual SMTP
5419 commands during the callout. The overall timeout applies when there is more
5420 than one host that can be tried. The timeout is checked before trying the
5421 next host. This prevents very long delays if there are a large number of
5422 hosts and all are timing out (e.g. when the network connections are timing
5423 out). The value of the overall timeout can be changed by specifying an
5424 additional sub-option for "callout", called "maxwait". For example:
5426 verify = sender/callout=5s,maxwait=20s
5428 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5429 to the end before writing, but this should make it even safer).
5431 22. Exim was forgetting that it had advertised PIPELINING for the second and
5432 subsequent messages on an SMTP connection. It was also not resetting its
5433 memory on STARTTLS and an internal HELO.
5435 23. When Exim logs an SMTP synchronization error within a session, it now
5436 records whether PIPELINING has been advertised or not.
5438 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5439 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5440 rather than long int.
5442 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5444 26. Added the never_mail option to autoreply.
5450 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5451 crash if the getsockname() call failed; this can happen if a connection is
5452 closed very soon after it is established. The problem was simply in the
5453 order in which certain operations were done, causing Exim to try to write
5454 to the SMTP stream before it had set up the file descriptor. The bug has
5455 been fixed by making things happen in the correct order.
5461 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5462 before the connection was closed, thus losing the rejection response.
5464 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5465 some early Solaris releases, but causes trouble in current releases where
5466 socklen_t is defined.
5468 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5471 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5474 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5475 that releasing the top of it at the end releases what was used for sub-
5476 expansions (unless the block got too big). However, discard this block if
5477 the first thing is a variable or header, so that we can use its block when
5478 it is dynamic (useful for very large $message_headers, for example).
5480 6. Lookups now cache *every* query, not just the most recent. A new, separate
5481 store pool is used for this. It can be recovered when all lookup caches are
5482 flushed. Lookups now release memory at the end of their result strings.
5483 This has involved some general refactoring of the lookup sources.
5485 7. Some code has been added to the store_xxx() functions to reduce the amount
5486 of flapping under certain conditions.
5488 8. log_incoming_interface used to affect only the <= reception log lines. Now
5489 it causes the local interface and port to be added to several more SMTP log
5490 lines, for example "SMTP connection from", and rejection lines.
5492 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5494 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5496 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5497 could be overwritten at the end of the current message (or the start of a
5498 new message if it was set in a HELO ACL). The value is now preserved for
5499 the duration of the SMTP connection.
5501 12. If a transport had a headers_rewrite setting, and a matching header line
5502 contained an unqualified address, that address was qualified, even if it
5503 did not match any rewriting rules. The underlying bug was that the values
5504 of the flags that permit the existence of unqualified sender and recipient
5505 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5506 non-local messages, and by -bnq for local messages) were not being
5507 preserved with the message after it was received.
5509 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5510 "next input=" as part of the text comprising the host identity instead of
5511 the correct text. The code was using the same buffer for two different
5512 strings. However, depending on which order the printing function evaluated
5513 its arguments, the bug did not always show up. Under Linux, for example, my
5514 test suite worked just fine.
5516 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5517 doesn't work with some older versions of Perl. It has been changed to "my",
5518 which in any case is probably the better facility to use.
5520 15. A really picky compiler found some instances of statements for creating
5521 error messages that either had too many or two few arguments for the format
5524 16. The size of the buffer for calls to the DNS resolver has been increased
5525 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5526 for addresses that have a lot of PTR records. This alleviates a problem; it
5527 does not fully solve it.
5529 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5530 buffer now truncates the list and logs the incident, which is the same
5531 action as happens when Exim is looking up a host name and its aliases.
5532 Previously in this situation something unpredictable would happen;
5533 sometimes it was "internal error: store_reset failed".
5535 18. If a server dropped the connection unexpectedly when an Exim client was
5536 using GnuTLS and trying to read a response, the client delivery process
5537 crashed while trying to generate an error log message.
5539 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5540 string, for example:
5542 warn message = H1: something\nH2: something
5544 the text was added as a single header line from Exim's point of view
5545 though it ended up OK in the delivered message. However, searching for the
5546 second and subsequent header lines using $h_h2: did not work. This has been
5547 fixed. Similarly, if a system filter added multiple headers in this way,
5548 the routers could not see them.
5550 20. Expanded the error message when iplsearch is called with an invalid key to
5551 suggest using net-iplsearch in a host list.
5553 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5554 ACLs are no longer actually imposed (and a message to that effect is
5557 22. If a "gecos" field in a passwd entry contained escaped characters, in
5558 particular, if it contained a \" sequence, Exim got it wrong when building
5559 a From: or a Sender: header from that name. A second bug also caused
5560 incorrect handling when an unquoted " was present following a character
5561 that needed quoting.
5563 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5564 was not being matched caselessly.
5566 24. Arranged for all hyphens in the exim.8 source to be escaped with
5569 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5570 properly. Recipient callout cache records were still being keyed to include
5571 the sender, even when use_sender was set false. This led to far more
5572 callouts that were necessary. The sender is no longer included in the key
5573 when use_sender is false.
5575 26. Added "control = submission" modifier to ACLs.
5577 27. Added the ${base62d: operator to decode base 62 numbers.
5579 28. dnsdb lookups can now access SRV records.
5581 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5582 the configuration file.
5584 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5585 (-v) mode. This makes the output for a verbose queue run more intelligible.
5587 31. Added a use_postmaster feature to recipient callouts.
5589 32. Added the $body_zerocount variable, containing the number of binary zero
5590 bytes in the message body.
5592 33. The time of last modification of the "new" subdirectory is now used as the
5593 "mailbox time last read" when there is a quota error for a maildir
5596 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5598 35. Added +ignore_unknown as a special item in host lists.
5600 36. Code for decoding IPv6 addresses in host lists is now included, even if
5601 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5602 address was recognized as an IP address, but was then not correctly decoded
5603 into binary, causing unexpected and incorrect effects when compared with
5610 1. Very minor rewording of debugging text in manualroute to say "list of
5611 hosts" instead of "hostlist".
5613 2. If verify=header_syntax was set, and a header line with an unqualified
5614 address (no domain) and a large number of spaces between the end of the
5615 name and the colon was received, the reception process suffered a buffer
5616 overflow, and (when I tested it) crashed. This was caused by some obsolete
5617 code that should have been removed. The fix is to remove it!
5619 3. When running in the test harness, delay a bit after writing a bounce
5620 message to get a bit more predictability in the log output.
5622 4. Added a call to search_tidyup() just before forking a reception process. In
5623 theory, someone could use a lookup in the expansion of smtp_accept_max_
5624 per_host which, without the tidyup, could leave open a database connection.
5626 5. Added the variables $recipient_data and $sender_data which get set from a
5627 lookup success in an ACL "recipients" or "senders" condition, or a router
5628 "senders" option, similar to $domain_data and $local_part_data.
5630 6. Moved the writing of debug_print from before to after the "senders" test
5633 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5634 problems for message scanning, either using a data ACL, or using
5635 local_scan() because the Received: header was not generated till after they
5636 were called (in order to set the time as the time of reception completion).
5637 I have revised the way this works. The header is now generated after the
5638 body is received, but before the ACL or local_scan() are called. After they
5639 are run, the timestamp in the header is updated.
5645 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5646 before starting a queue runner without re-exec. This happened only when
5647 deliver_drop_privilege was set or when the Exim user was set to root. The
5648 effect of the bug was that timeouts during subsequent deliveries caused
5649 crashes instead of being properly handled. The handler is now left at its
5650 default (and expected) setting.
5652 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5653 message, again when deliver_drop_privilege is set or Exim is run as root.
5654 The bug described in (1) was not present in this case, but the tidying up
5655 of the other signals was missing. I have made the two cases consistent.
5657 3. The ignore_target_hosts setting on a manualroute router was being ignored
5658 for hosts that were looked up using the /MX notation.
5660 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5663 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5664 operated on the sender address. After changing the $sender_address to <>
5665 for the sender address verify, Exim was re-instated it as the original
5666 (before rewriting) address, but remembering that it had rewritten it, so it
5667 wasn't rewriting it again. This bug also had the effect of breaking the
5668 sender address verification caching when the sender address was rewritten.
5670 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5671 This has been changed so that if the ip literal address matches
5672 ignore_target_hosts, the router declines.
5674 7. Added expansion conditions match_domain, match_address, and match_local_
5675 part (NOT match_host).
5677 8. The placeholder for the Received: header didn't have a length field set.
5679 9. Added code to Exim itself and to exim_lock to test for a specific race
5680 condition that could lead to file corruption when using MBX delivery. The
5681 issue is with the lockfile that is created in /tmp. If this file is removed
5682 after a process has opened it but before that process has acquired a lock,
5683 there is the potential for a second process to recreate the file and also
5684 acquire a lock. This could lead to two Exim processes writing to the file
5685 at the same time. The added code performs the same test as UW imapd; it
5686 checks after acquiring the lock that its file descriptor still refers to
5687 the same named file.
5689 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5690 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5693 11. Added the smtp_active_hostname option. If used, this will typically be made
5694 to depend on the incoming interface address. Because $interface_address is
5695 not set up until the daemon has forked a reception process, error responses
5696 that can happen earlier (such as "too many connections") no longer contain
5699 12. If an expansion in a condition on a "warn" statement fails because a lookup
5700 defers, the "warn" statement is abandoned, and the next ACL statement is
5701 processed. Previously this caused the whole ACL to be aborted.
5703 13. Added the iplsearch lookup type.
5705 14. Added ident_timeout as a log selector.
5707 15. Added tls_certificate_verified as a log selector.
5709 16. Added a global option tls_require_ciphers (compare the smtp transport
5710 option of the same name). This controls incoming TLS connections.
5712 17. I finally figured out how to make tls_require_ciphers do a similar thing
5713 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5714 before starting the TLS session.
5716 18. Tabs are now shown as \t in -bP output.
5718 19. If the log selector return_path_on_delivery was set, Exim crashed when
5719 bouncing a message because it had too many Received: header lines.
5721 20. If two routers both had headers_remove settings, and the first one included
5722 a superfluous trailing colon, the final name in the first list and the
5723 first name in the second list were incorrectly joined into one item (with a
5724 colon in the middle).
5730 1. Added -C and -D options to the exinext utility, mainly to make it easier
5731 to include in the automated testing, but these could be helpful when
5732 multiple configurations are in use.
5734 2. The exinext utility was not formatting the output nicely when there was
5735 an alternate port involved in the retry record key, nor when there was a
5736 message id as well (for retries that were specific to a specific message
5737 and a specific host). It was also confused by IPv6 addresses, because of
5738 the additional colons they contain. I have fixed the IPv4 problem, and
5739 patched it up to do a reasonable job for IPv6.
5741 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5742 delivery, the log line now contains "pipelined" if PIPELINING was used.
5744 4. An SMTP transport process used to panic and die if the bind() call to set
5745 an explicit outgoing interface failed. This has been changed; it is now
5746 treated in the same way as a connect() failure.
5748 5. A reference to $sender_host_name in the part of a conditional expansion
5749 that was being skipped was still causing a DNS lookup. This no longer
5752 6. The def: expansion condition was not recognizing references to header lines
5753 that used bh_ and bheader_.
5755 7. Added the _cache feature to named lists.
5757 8. The code for checking quota_filecount in the appendfile transport was
5758 allowing one more file than it should have been.
5760 9. For compatibility with Sendmail, the command line option
5768 and sets the incoming protocol and host name (for trusted callers). The
5769 host name and its colon can be omitted when only the protocol is to be set.
5770 Note the Exim already has two private options, -pd and -ps, that refer to
5771 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5772 "s", but I don't think that's a major issue.
5774 10. A number of refactoring changes to the code, none of which should affect
5777 (a) The number of logging options was getting close to filling up the
5778 32-bit word that was used as a bit map. I have split them into two classes:
5779 those that are passed in the argument to log_write(), and those that are
5780 only ever tested independently outside of that function. These are now in
5781 separate 32-bit words, so there is plenty of room for expansion again.
5782 There is no change in the user interface or the logging behaviour.
5784 (b) When building, for example, log lines, the code previously used a
5785 macro that called string_cat() twice, in order to add two strings. This is
5786 not really sufficiently general. Furthermore, there was one instance where
5787 it was actually wrong because one of the argument was used twice, and in
5788 one call a function was used. (As it happened, calling the function twice
5789 did not affect the overall behaviour.) The macro has been replaced by a
5790 function that can join an arbitrary number of extra strings onto a growing
5793 (c) The code for expansion conditions now uses a table and a binary chop
5794 instead of a serial search (which was left over from when there were very
5795 few conditions). Also, it now recognizes conditions like "pam" even when
5796 the relevant support is not compiled in: a suitably worded error message is
5797 given if an attempt is made to use such a condition.
5799 11. Added ${time_interval:xxxxx}.
5801 12. A bug was causing one of the ddress fields not to be passed back correctly
5802 from remote delivery subprocesses. The field in question was not being
5803 subsequently used, so this caused to problems in practice.
5805 13. Added new log selectors queue_time and deliver_time.
5807 14. Might have fixed a bug in maildirsizefile handling that threw up
5808 "unexpected character" debug warnings, and recalculated the data
5809 unnecessarily. In any case, I expanded the warning message to give more
5812 15. Added the message "Restricted characters in address" to the statements in
5813 the default ACL that block characters like @ and % in local parts.
5815 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5816 Three changes have been made:
5818 (a) There was a serious bug; a negative response to MAIL caused the whole
5819 recipient domain to be cached as invalid, thereby blocking all messages
5820 to all local parts at the same domain, from all senders. This bug has
5821 been fixed. The domain is no longer cached after a negative response to
5822 MAIL if the sender used is not empty.
5824 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5827 (c) A new callout option, "use_sender" has been added for people who want
5828 the modified behaviour.
5834 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5837 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5838 indeed breaks things for older releases.
5840 3. Added additional logging to the case where there is a problem reading data
5841 from a filter that is running in a subprocess using a pipe, in order to
5842 try to track down a specific problem.
5844 4. Testing facility fudge: when running in the test harness and attempting
5845 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5846 getting "No route to host". Convert this to a timeout.
5848 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5851 6. Some OS don't have socklen_t but use size_t instead. This affects the
5852 fifth argument of getsockopt() amongst other things. This is now
5853 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5854 can be set for individual OS. I have set it for SunOS5, OSF1, and
5855 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5856 some earlier ones do not.
5858 7. Change 4.30/15 was not doing the test caselessly.
5860 8. The standard form for an IPv6 address literal was being rejected by address
5861 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5862 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5863 this, as well as the form without the "IPv6" on the front (but only when
5864 address literals are enabled, of course).
5866 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5868 10. Exim crashed if a message with an empty sender address specified by -f
5869 encountered a router with an errors_to setting. This could be provoked only
5870 by a command such as
5874 where an empty string was supplied; "<>" did not hit this bug.
5876 11. Installed PCRE release 4.5.
5878 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5879 remained set. It is now erased.
5881 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5882 times from message ids (which are base 36 rather than the normal 62).
5884 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5885 were being counted as actual protocol errors, and logged if the log
5886 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5887 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5888 and DATA following a set of rejected RCPTs do not count as protocol errors.
5889 In other words, Exim assumes they were pipelined, though this may not
5890 actually be the case. Of course, in all cases the client gets an
5891 appropriate error code.
5893 15. If a lookup fails in an ACL condition, a message about the failure may
5894 be available; it is used if testing the ACL cannot continue, because most
5895 such messages specify what the cause of the deferral is. However, some
5896 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5897 that caused an old message to be retained and used if a later statement
5898 caused a defer, replacing the real cause of the deferral.
5900 16. If an IP address had so many PTR records that the DNS lookup buffer
5901 was not large enough to hold them, Exim could crash while trying to process
5902 the truncated data. It now detects and logs this case.
5904 17. Further to 4.21/58, another change has been made: if (and only if) the
5905 first line of a message (the first header line) ends with CRLF, a bare LF
5906 in a subsequent header line has a space inserted after it, so as not to
5907 terminate the header.
5909 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5910 unnecessarily, used atoi() instead of strtol(), and didn't check the
5911 termination when getting file sizes from file names by regex.
5913 19. Completely re-implemented the support for maildirsize files, in the light
5914 of a number of problems with the previous contributed implementation
5915 (4.30/29). In particular:
5917 . If the quota is zero, the maildirsize file is maintained, but no quota is
5920 . If the maildir directory does not exist, it is created before any attempt
5921 to write a maildirsize file.
5923 . The quota value in the file is just a cache; if the quota is changed in
5924 the transport, the new value overrides.
5926 . A regular expression is available for excluding directories from the
5929 20. The autoreply transport checks the characters in options that define the
5930 message's headers; it allows continued headers, but it was checking with
5931 isspace() after an embedded newline instead of explicitly looking for a
5934 21. If all the "regular" hosts to which an address was routed had passed their
5935 expiry times, and had not reached their retry times, the address was
5936 bounced, even if fallback hosts were defined. Now Exim should go on to try
5939 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5940 equivalent code in the SMTP transport. Some hosts send humungous responses
5941 to HELO/EHLO, more than 1024 it seems.
5943 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5944 gives compiler warnings in some environments. I've now done it "properly",
5947 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5948 (because of problems with the built-in one) was declared to return uschar *
5949 instead of char *, causing compiler failure.
5951 25. Fixed a file descriptor leak when processing alias/forward files.
5953 26. Fixed a minor format string issue in dbfn.c.
5955 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5957 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5958 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5961 29. When a sender address is verified, it is cached, to save repeating the test
5962 when there is more than one recipient in a message. However, when the
5963 verification involves a callout, it is possible for different callout
5964 options to be set for different recipients. It is too complicated to keep
5965 track of this in the cache, so now Exim always runs a verification when a
5966 callout is required, relying on the callout cache for the optimization.
5967 The overhead is duplication of the address routing, but this should not be
5970 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5971 to be verified with callout=postmaster, and the main callout worked but the
5972 postmaster check failed, the verification correctly failed. However, if a
5973 subsequent RCPT command asked for sender verification *without* the
5974 postmaster check, incorrect caching caused this verification also to fail,
5977 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5978 it was not caching the DNS options (qualify_single, search_parents) that
5979 were used when the lookup failed. A subsequent lookup with different
5980 options therefore always gave the same answer, though there were cases
5981 where it should not have. (Example: a "domains = !$mx_any" option on a
5982 dnslookup router: the "domains" option is always processed without any
5983 widening, but the router might have qualify_single set.) Now Exim uses the
5984 cached value only when the same options are set.
5986 32. Added John Jetmore's "exipick" utility to the distribution.
5988 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5989 than a timeout (e.g. a certificate is required, and is not provided), an
5990 Exim server now closes the connection immediately. Previously it waited for
5991 the client to close - but if the client is SSL, it seems that they each
5992 wait for each other, leading to a delay before one of them times out.
5994 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5995 maintained 0.8.x compatibility because I don't think many are using it, and
5996 it is clearly obsolete.
5998 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6001 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6002 client certificate was expired. A simple patch fixes this, though I don't
6003 understand the full logic of why the verify callback is called multiple
6006 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6007 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6008 which causes problems with some clients (such as the Certicom SSL Plus
6009 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6010 disables the coutermeasure allowing Eudora to connect."
6012 38. Exim was not checking that a write() to a log file succeeded. This could
6013 lead to Bad Things if a log got too big, in particular if it hit a file
6014 size limit. Exim now panics and dies if it cannot write to a log file, just
6015 as it does if it cannot open a log file.
6017 39. Modified OS/Makefile-Linux so that it now contains
6019 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6021 The two -D definitions ensure that Exim is compiled with large file
6022 support, which makes it possible to handle log files that are bigger than
6025 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6026 instance) a domain was checked against a named list that involved a lookup,
6027 causing $domain_data to be set, then another domain was checked against the
6028 same list, then the first domain was re-checked, the value of $domain_data
6029 after the final check could be wrong. In particular, if the second check
6030 failed, it could be set empty. This bug probably also applied to
6033 41. The strip_trailing_dot option was not being applied to the address given
6034 with the -f command-line option.
6036 42. The code for reading a message's header from the spool was incrementing
6037 $received_count, but never initializing it. This meant that the value was
6038 incorrect (doubled) while delivering a message in the same process in which
6039 it was received. In the most common configuration of Exim, this never
6040 happens - a fresh exec is done - but it can happen when
6041 deliver_drop_privilege is set.
6043 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6044 it now includes up to 150 characters of the unexpected data in the log
6047 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6048 and building data strings. The size of both of these buffers was 10 000
6049 bytes - far larger than anybody would *ever* want, thought I. Needless to
6050 say, somebody hit the limit. I have increased the maximum line length to
6051 20 000 and the maximum data length of concatenated lines to 100 000. I have
6052 also fixed two bugs, because there was no checking on these buffers. Tsk,
6053 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6054 buffer is too small.
6056 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6057 lsearch lookups. Now it does.
6059 46. When parsing a route_list item in a manualroute router, a fixed-length
6060 buffer was used for the list of hosts. I made this 1024 bytes long,
6061 thinking that nobody would ever have a list of hosts that long. Wrong.
6062 Somebody had a whole pile of complicated expansion conditions, and the
6063 string was silently truncated, leading to an expansion error. It turns out
6064 that it is easier to change to an unlimited length (owing to other changes
6065 that have happened since this code was originally written) than to build
6066 structure for giving a limitation error. The length of the item that
6067 expands into the list of hosts is now unlimited.
6069 47. The lsearch lookup could not handle data where the length of text line was
6070 more than 4095 characters. Such lines were truncated, leading to shortened
6071 data being returned. It should now handle lines of any length.
6073 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6074 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6077 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6078 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6079 no longer happens in comment lines. A list of replacements is now placed
6080 at the head of all of the source files, except those whose only change is
6081 to replace PERL_COMMAND in the very first #! line.
6083 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6084 messages on the queue, with a bottom-up merge sort, using code contributed
6085 by Michael Haardt. This should make operations like -bp somewhat faster on
6086 large queues. It won't affect queue runners, except when queue_run_in_order
6089 51. Installed eximstats 1.31 in the distribution.
6091 52. Added support for SRV lookups to the dnslookup router.
6093 53. If an ACL referred to $message_body or $message_body_end, the value was not
6094 reset for any messages that followed in the same SMTP session.
6096 54. The store-handling optimization for building very long strings was not
6097 differentiating between the different store pools. I don't think this
6098 actually made any difference in practice, but I've tidied it.
6100 55. While running the routers to verify a sender address, $sender_address
6101 was still set to the sender address. This is wrong, because when routing to
6102 send a bounce to the sender, it would be empty. Therefore, I have changed
6103 it so that, while verifying a sender address, $sender_address is set to <>.
6104 (There is no change to what happens when verifying a recipient address.)
6106 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6107 target A or AAAA records (if not already returned) without resetting the
6108 qualify_single or search_parents options of the DNS resolver. These are
6109 inappropriate in this case because the targets of MX and SRV records must
6110 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6111 target that, when qualified, matched something in the local domain. These
6112 two options are now turned off when doing these lookups.
6114 57. It seems that at least some releases of Reiserfs (which does not have the
6115 concept of a fixed number of inodes) returns zero and not -1 for the
6116 number of available inodes. This interacted badly with check_spool_inodes,
6117 which assumed that -1 was the "no such thing" setting. What I have done is
6118 to check that the total number of inodes is greater than zero before doing
6119 the test of how many are available.
6121 58. When a "warn" ACL statement has a log_message modifier, the message is
6122 remembered, and not repeated. This is to avoid a lot of repetition when a
6123 message has many recipients that cause the same warning to be written.
6124 However, Exim was preserving the list of already written lines for an
6125 entire SMTP session, which doesn't seem right. The memory is now reset if a
6126 new message is started.
6128 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6129 debugging output unless log_rewrite was also set.
6131 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6132 of (int)(handle) when we know that handle contains (void *)(-1).
6134 61. The Exim daemon panic-logs an error return when it closes the incoming
6135 connection. However "connection reset by peer" seems to be common, and
6136 isn't really an error worthy of noting specially, so that particular error
6139 62. When Exim is trying to find all the local interfaces, it used to panic and
6140 die if the ioctl to get the interface flags failed. However, it seems that
6141 on at least one OS (Solaris 9) it is possible to have an interface that is
6142 included in the list of interfaces, but for which you get a failure error
6143 for this call. This happens when the interface is not "plumbed" into a
6144 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6145 failure of the "get flags" call assumes that the interface is down.
6147 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6148 makes life easier for people who are doing arithmetic on fields extracted
6149 from dates, where you often get leading zeros that should not be
6150 interpreted as octal.
6152 64. Added qualify_domain to the redirect router, to override the global
6155 65. If a pathologically long header line contained very many addresses (the
6156 report of this problem mentioned 10 000) and each of them was rewritten,
6157 Exim could use up a very large amount of memory. (It kept on making new
6158 copies of the header line as it rewrote, and never released the old ones.)
6159 At the expense of a bit more processing, the header rewriting function has
6160 been changed so that it no longer eats memory in this way.
6162 66. The generation of the Received: header has been moved from the time that a
6163 message starts to be received, to the time that it finishes. The timestamp
6164 in the Received: header should now be very close to that of the <= log
6165 line. There are two side-effects of this change:
6167 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6168 logged header lines no longer include the local Received: line, because
6169 it has not yet been created. The same applies to a copy of the message
6170 that is returned to a non-SMTP sender when a message is rejected.
6172 (b) When a filter file is tested using -bf, no additional Received: header
6173 is added to the test message. After some thought, I decided that this
6176 This change does not affect the value of $received_for. It is still set
6177 after address rewriting, but before local_scan() is called.
6179 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6181 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6182 gave an unhelpful panic error message, and a defer error. I have managed to
6183 change this behaviour so that it now rejects any supplied certificate,
6184 which seems right, as the list of acceptable certificates is empty.
6186 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6187 gave an unhelpful defer error. I have not managed to make this reject any
6188 supplied certificates, but the error message it gives is "no certificate
6189 supplied", which is not helpful.
6191 70. exigrep's output now also includes lines that are not associated with any
6192 message, but which match the given pattern. Implemented by a patch from
6193 Martin Sluka, which also tidied up the Perl a bit.
6195 71. Recipient callout verification, like sender verification, was using <> in
6196 the MAIL FROM command. This isn't really the right thing, since the actual
6197 sender may affect whether the remote host accepts the recipient or not. I
6198 have changed it to use the actual sender in the callout; this means that
6199 the cache record is now keyed on a recipient/sender pair, not just the
6200 recipient address. There doesn't seem to be a real danger of callout loops,
6201 since a callout by the remote host to check the sender would use <>.
6202 [SEE ABOVE: changed after hitting problems.]
6204 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6205 temporary errors. However, in the case of such a code being given after
6206 the end of a data transmission (i.e. after ".") Exim was failing to write
6207 a retry record for the message. (Yes, there was some broken host that was
6208 actually sending 8xx at this point.)
6210 73. An unknown lookup type in a host list could cause Exim to panic-die when
6211 the list was checked. (An example that provoked this was putting <; in the
6212 middle of a list instead of at the start.) If this happened during a DATA
6213 ACL check, a -D file could be left lying around. This kind of configuration
6214 error no longer causes Exim to die; instead it causes a defer error. The
6215 incident is still logged to the main and panic logs.
6217 74. Buglet left over from Exim 3 conversion. The message "too many messages
6218 in one connection" was written to the rejectlog but not the mainlog, except
6219 when address rewriting (yes!) was being logged.
6221 75. Added write_rejectlog option.
6223 76. When a system filter was run not as root (that is, when system_filter_user
6224 was set), the values of the $n variables were not being returned to the
6225 main process; thus, they were not subsequently available in the $sn
6228 77. Added +return_path_on_delivery log selector.
6230 78. A connection timeout was being treated differently from recipients deferred
6231 when testing hosts_max_try with a message that was older than the host's
6232 retry timeout. (The host should not be counted, thus allowing all hosts to
6233 be tried at least once before bouncing.) This may have been the cause of an
6234 occasionally reported bug whereby a message would remain on the queue
6235 longer than the retry timeout, but would be bounced if a delivery was
6236 forced. I say "may" because I never totally pinned down the problem;
6237 setting up timeout/retry tests is difficult. See also the next item.
6239 79. The ultimate address timeout was not being applied to errors that involved
6240 a combination of host plus message (for example, a timeout on a MAIL
6241 command). When an address resolved to a number of possible hosts, and they
6242 were not all tried for each delivery (e.g. because of hosts_max_try), a
6243 message could remain on the queue longer than the retry timeout.
6245 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6248 81. Fixed an obscure SMTP outgoing bug which required at least the following
6249 conditions: (a) there was another message waiting for the same server;
6250 (b) the server returned 5xx to all RCPT commands in the first message so
6251 that the message was not completed; (c) the server dropped the connection
6252 or gave a negative response to the RSET that Exim sends to abort the
6253 transaction. The observed case was a dropped connection after DATA that had
6254 been sent in pipelining mode. That is, the server had advertised PIPELINING
6255 but was not implementing it correctly. The effect of the bug was incorrect
6256 behaviour, such as trying another host, and this could lead to a crash.
6262 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6263 and daemon.c were passed as pointers to ints; they should have been
6264 pointers to socklen_t variables (which are typically unsigned ints).
6266 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6269 3. Fixed a really odd bug that affected only the testing scheme; patching a
6270 certain fixed string in the binary changed the value of another string that
6271 happened to be identical to the end of the original first string.
6273 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6274 name", it returns that address as the IP address. On some operating
6275 systems (e.g. Solaris), it also passes back the IP address string as the
6276 "host name". However, on others (e.g. Linux), it passes back an empty
6277 string. Exim wasn't checking for this, and was changing the host name to an
6278 empty string, assuming it had been canonicalized.
6280 5. Although rare, it is permitted to have more than one PTR record for a given
6281 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6282 all the names associated with an address, because they do in Solaris.
6283 However, it seems that they do not in Linux for data that comes from the
6284 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6285 I found this out when I moved to a new Linux workstation and tried to run
6286 the Exim test suite.
6288 To get round this problem I have changed the code so that it now does its
6289 own call to the DNS to look up PTR records when searching for a host name.
6290 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6291 addresses that are only in /etc/hosts are still found.
6293 This behaviour is, however, controlled by an option called host_lookup_
6294 order, which defaults to "bydns:byaddr". If people want to use the other
6295 order, or indeed, just use one or the other means of lookup, they can
6296 specify it in this variable.
6298 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6299 some operating systems, this comes back from gethostbyaddr() as an empty
6300 string, and this is what Exim used to test for. However, it seems that in
6301 other systems, "." is yielded. Exim now tests for this case too.
6303 7. The values of check_spool_space and check_log_space are now held internally
6304 as a number of kilobytes instead of an absolute number of bytes. If a
6305 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6306 kilobyte. This means that much larger values can be stored.
6308 8. Exim monitor: an attempt to get the action menu when not actually pointing
6309 at a message produces an empty menu entitled "No message selected". This
6310 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6311 no entries in it ("Shell widget menu has zero width and/or height"). So I
6312 have added a single, blank menu entry in this case.
6314 9. Added ${quote_local_part.
6316 10. MIME decoding is now applied to the contents of Subject: header lines when
6319 11. Now that a reference to $sender_host_address automatically causes a reverse
6320 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6321 host lookup before query-style lookups in lists that might use this
6322 variable. This has therefore been abolished, and the "net-" prefix is no
6323 longer necessary for query-style lookups.
6325 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6326 have been a typo for LFLAGS, so it has been changed.
6328 13. The install script calls Exim with "-C /dev/null" in order to find the
6329 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6330 to be output. However, since Exim outputs its version number before the
6331 error, it didn't break the script. It just looked ugly. I fixed this by
6332 always allowing "-C /dev/null" if the caller is root.
6334 14. Ignore overlarge ACL variable number when reading spool file - insurance
6335 against a later release with more variables having written the file.
6337 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6338 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6339 this, as well as the form without the "IPv6" on the front.
6341 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6342 OS/Makefile-Darwin file.
6344 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6345 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6347 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6348 variable. However, some OS use ints for inodes. I've added cast to long int
6349 to get rid of the compiler warning.
6351 19. I had forgotten to lock out "/../" in configuration file names when
6352 ALT_CONFIG_PREFIX was set.
6354 20. Routers used for verification do not need to specify transports. However,
6355 if such a router generated a host list, and callout was configured, Exim
6356 crashed, because it could not find a port number from the (non-existent)
6357 transport. It now assumes port 25 in this circumstance.
6359 21. Added the -t option to exigrep.
6361 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6362 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6363 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6364 them is set, LOOKUP_LSEARCH is forced.
6366 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6368 24. Added sender and host information to the "rejected by local_scan()" log
6369 line; previously there was no indication of these.
6371 25. Added .include_if_exists.
6373 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6374 Linux. It turns out that not all file systems support this. Apparently some
6375 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6376 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6377 not supported on the file descriptor, is now ignored when Exim is trying to
6378 sync a directory. This applies only to Linux.
6380 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6382 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6383 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6386 29. Added support for maildirsize files from supplied patch (modified a bit).
6388 30. The use of :fail: followed by an empty string could lead Exim to respond to
6389 sender verification failures with (e.g.):
6391 550 Verification failed for <xxx>
6392 550 Sender verify failed
6394 where the first response line was missing the '-' that indicates it is not
6395 the final line of the response.
6397 31. The loop for finding the name of the user that called Exim had a hardwired
6398 limit of 10; it now uses the value of finduser_retries, which is used for
6399 all other user lookups.
6401 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6404 33. Exim was neglecting to zero errno before one call of strtol() when
6405 expanding a string and expecting an integer value. On some systems this
6406 resulted in spurious "integer overflow" errors. Also, it was casting the
6407 result into an int without checking.
6409 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6410 did not work. The code looks as if it has *never* worked, though it appears
6411 to have been documented since at least release 1.62. I have made it work.
6413 35. The "timeout_DNS" error in retry rules, also documented since at least
6414 1.62, also never worked. As it isn't clear exactly what this means, and
6415 clearly it isn't a major issue, I have abolished the feature by treating it
6416 as "timeout", and writing a warning to the main and panic logs.
6418 36. The display of retry rules for -brt wasn't always showing the error code
6421 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6422 timeout_connect_A, timeout_connect_MX.
6424 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6425 to the empty sender.
6427 39. The daemon was not analysing the content of -oX till after it had closed
6428 stderr and disconnected from the controlling terminal. This meant that any
6429 syntax errors were only noted on the panic log, and the return code from
6430 the command was 0. By re-arranging the code a little, I've made the
6431 decoding happen first, so such errors now appear on stderr, and the return
6432 code is 1. However, the actual setting up of the sockets still happens in
6433 the disconnected process, so errors there are still only recorded on the
6436 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6437 connections (as happens on some IP stacks) was logged at start up time as
6438 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6439 it from "IPv6 and IPv4", which means that two separate sockets are being
6442 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6443 says whether AF_INET or AF_INET6 was passed as an argument.
6445 42. Exiwhat output was messed up when time zones were included in log
6448 43. Exiwhat now gives more information about the daemon's listening ports,
6449 and whether -tls-on-connect was used.
6451 44. The "port" option of the smtp transport is now expanded.
6453 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6454 silently ignored. Now an error message is written to the main and panic
6457 46. There's a new ACL modifier called "logwrite" which writes to a log file
6458 as soon as it is encountered.
6460 47. Added $local_user_uid and $local_user_gid at routing time.
6462 48. Exim crashed when trying to verify a sender address that was being
6465 49. Exim was recognizing only a space character after ".include". It now also
6466 recognizes a tab character.
6468 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6469 extracting the relevant information from the specification. The man page no
6470 longer contains scrambled data for the -d option, and I've added a section
6471 at the front about calling Exim under different names.
6473 51. Added "extra_headers" argument to the "mail" command in filter files.
6475 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6478 53. Installed eximstats 1.29.
6480 54. Added transport_filter_timeout as a generic transport option.
6482 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6483 Cc: header lines. This was required by RFC 822, but it not required by RFC
6486 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6487 incoming messages that did not have them. Now it does so only if the
6488 message originates locally, that is, if there is no associated remote host
6489 address. When Resent- header lines are present, this applies to the Resent-
6490 lines rather than the non-Resent- lines.
6492 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6493 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6495 58. Messages for configuration errors now include the name of the main
6496 configuration file - useful now that there may be more than one file in a
6497 list (.included file names were always shown).
6499 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6500 for those rare installations that do not start the daemon as root or run it
6501 setuid root. I've cut out the call to initgroups() if the daemon is not
6504 60. The Exim user and group can now be bound into the binary as text strings
6505 that are looked up at the start of Exim's processing.
6507 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6509 62. Added $mailstore_basename variable.
6511 63. Installed patch to sieve.c from Michael Haardt.
6513 64. When Exim failed to open the panic log after failing to open the main log,
6514 the original message it was trying to log was written to stderr and debug
6515 output, but if they were not available (the usual case in production), it
6516 was lost. Now it is written to syslog before the two lines that record the
6517 failures to open the logs.
6519 65. Users' Exim filters run in subprocesses under the user's uid. It is
6520 possible for a "deliver" command or an alias in a "personal" command to
6521 provoke an address rewrite. If logging of address rewriting is configured,
6522 this fails because the process is not running as root or exim. There may be
6523 a better way of dealing with this, but for the moment (because 4.30 needs
6524 to be released), I have disabled address rewrite logging when running a
6525 filter in a non-root, non-exim process.
6531 1. The buildconfig auxiliary program wasn't quoting the value set for
6532 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6533 not defined. This bug was masked in 4.22 by the effect that was fixed in
6536 2. Some messages that were rejected after a message id was allocated were
6537 shown as "incomplete" by exigrep. It no longer does this for messages that
6538 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6540 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6541 have allow_domain_literals set, the ID did not get logged in the <= line.
6542 Domain literals are now always recognized in Message-ID: header lines.
6544 4. The first argument for a ${extract expansion item is the key name or field
6545 number. Leading and trailing spaces in this item were not being ignored,
6546 causing some misleading effects.
6548 5. When deliver_drop_privilege was set, single queue runner processes started
6549 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6550 same command in the process it spins off) were not dropping privilege.
6552 6. When the daemon running as "exim" started a queue runner, it always
6553 re-executed Exim in the spun-off process. This is a waste of effort when
6554 deliver_drop_privilege is set. The new process now just calls the
6555 queue-runner function directly.
6561 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6564 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6565 ignored. Though the use of -oP was forcing the writing of a pid file, it
6566 was always written to the default place.
6568 3. If the message "no IP address found for host xxxx" is generated during
6569 incoming verification, it is now followed by identification of the incoming
6570 connection (so you can more easily find what provoked it).
6572 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6574 5. Added some features to "harden" Exim a bit more against certain attacks:
6576 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6577 be put in Local/Makefile. This is like the never_users runtime option,
6578 but it cannot be overridden. The default setting is "root".
6580 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6581 prefix string with which any file named in a -C command line option
6584 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6585 is retained for -C and -D only if the caller of Exim is root. Without
6586 it, the exim user may also use -C and -D and retain privilege.
6588 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6589 command line option is disabled.
6591 6. Macro names set by the -D option must start with an upper case letter, just
6592 like macro names defined in the configuration file.
6594 7. Added "dereference=" facility to LDAP.
6596 8. Two instances of the typo "uknown" in the source files are fixed.
6598 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6599 the Configure-Makefile script screwed up while processing it.
6601 10. Incorporated PCRE 4.4.
6603 11. The SMTP synchronization check was not operating right at the start of an
6604 SMTP session. For example, it could not catch a HELO sent before the client
6605 waited for the greeting. There is now a check for outstanding input at the
6606 point when the greeting is written. Because of the duplex, asynchronous
6607 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6608 way, but not yet received, when the check is performed.
6610 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6611 on TCP/IP sockets, because this apparently causes some broken clients to
6614 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6615 unchanged) from the Cygwin maintainer.
6617 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6618 was supported instead of testing for mbx. Effectively a typo.
6620 15. The spa authenticator server code was not checking that the input it
6621 received was valid base64.
6623 16. The debug output line for the "set" modifier in ACLs was not showing the
6624 name of the variable that was being set.
6626 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6628 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6629 lookup on its own. Something else was needed to trigger the lookup. For
6630 example, a match in host_lookup or the need for a host name in a host list.
6631 Now, if $sender_host_name is referenced and the host name has not yet been
6632 looked up, a lookup is performed. If the lookup fails, the variable remains
6633 empty, and $host_lookup_failed is set to "1".
6635 19. Added "eqi" as a case-independent comparison operator.
6637 20. The saslauthd authentication condition could segfault if neither service
6638 nor realm was specified.
6640 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6641 error message that was logged was misleading, and incoming SMTP
6642 connections were dropped. The message is now more accurate, and temporary
6643 errors are given to SMTP connections.
6645 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6646 (except RSET) with a 421 error, until QUIT is received. However, it was
6647 failing to send a response to QUIT.
6649 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6650 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6651 ACL is now run after the helo_try_verify_hosts code.
6653 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6654 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6655 case-independent, so other case variants are also recognized). Apparently
6656 some systems use these upper case variants.
6658 25. If more than two messages were waiting for the same host, and a transport
6659 filter was specified for the transport, Exim sent two messages over the
6660 same TCP/IP connection, and then failed with "socket operation on non-
6661 socket" when it tried to send the third.
6663 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6665 27. The extern definition of crypt16() in expand.c was not being excluded when
6666 the OS had its own crypt16() function.
6668 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6669 as a preferred synonym for return_size_limit, both as an option and as an
6672 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6674 30. Changed the default configuration ACL to relax the local part checking rule
6675 for addresses that are not in any local domains. For these addresses,
6676 slashes and pipe symbols are allowed within local parts, but the sequence
6677 /../ is explicitly forbidden.
6679 31. SPA server authentication was not clearing the challenge buffer before
6682 32. log_message in a "warn" ACL statement was writing to the reject log as
6683 well as to the main log, which contradicts the documentation and doesn't
6684 seem right (because no rejection is happening). So I have stopped it.
6686 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6687 However, I am unable to do any testing of this.
6689 34. Fixed an infelicity in the appendfile transport. When checking directories
6690 for a mailbox, to see if any needed to be created, it was accidentally
6691 using path names with one or more superfluous leading slashes; tracing
6692 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6694 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6695 contents are added to the log line that is written for every discarded
6696 recipient. (Previously a log_message setting was ignored.)
6698 36. The ${quote: operator now quotes the string if it is empty.
6700 37. The install script runs exim in order to find its version number. If for
6701 some reason other than non-existence or emptiness, which it checks, it
6702 could not run './exim', it was installing it with an empty version number,
6703 i.e. as "exim-". This error state is now caught, and the installation is
6706 38. An argument was missing from the function that creates an error message
6707 when Exim fails to connect to the socket for saslauthd authentication.
6708 This could cause Exim to crash, or give a corrupted message.
6710 39. Added isip, isip4, and isip6 to ${if conditions.
6712 40. The ACL variables $acl_xx are now saved with the message, and can be
6713 accessed later in routers, transports, and filters.
6715 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6716 strings in the file are not string-expanded.
6718 42. If a MAIL command specified a SIZE value that was too large to fit into an
6719 int variable, the check against message_size_limit failed. Such values are
6720 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6721 day this will have to be increased, but I don't think I want to be around
6722 when emails are that large.
6729 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6730 iconv() is not standard in FreeBSD.
6732 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6733 IPv6 enabled. The observed symptom was a segmentation fault on return from
6734 the function os_common_find_running_interfaces() in src/os.c.
6736 3. In the check_special_case() function in daemon.c I had used "errno" as an
6737 argument name, which causes warnings on some systems. This was basically a
6738 typo, since it was named "eno" in the comments!
6740 4. The code that waits for the clock to tick (at a resolution of some fraction
6741 of a second) so as to ensure message-id uniqueness was always waiting for
6742 at least one whole tick, when it could have waited for less. [This is
6743 almost certainly not relevant at current processor speeds, where it is
6744 unlikely to ever wait at all. But we try to future-proof.]
6746 5. The function that sleeps for a time interval that includes fractions of a
6747 second contained a race. It did not block SIGALRM between setting the
6748 timer, and suspending (a couple of lines later). If the interval was short
6749 and the sigsuspend() was delayed until after it had expired, the suspension
6750 never ended. On busy systems this could lead to processes getting stuck for
6753 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6754 process, before it forks any delivery processes. The open lookup caching
6755 mechanism meant that the open file or database connection was passed into
6756 the delivery process. The problem was that delivery processes always tidy
6757 up cached lookup data. This could cause a problem for the next delivery
6758 process started by the queue runner, because the external queue runner
6759 process does not know about the closure. So the next delivery process
6760 still has data in the lookup cache. In the case of a file lookup, there was
6761 no problem because closing a file descriptor in a subprocess doesn't affect
6762 the parent. However, if the lookup was caching a connection to a database,
6763 the connection was closed, and the second delivery process was likely to
6764 see errors such as "PGSQL: query failed: server closed the connection
6765 unexpectedly". The problem has been fixed by closing all cached lookups
6766 in a queue runner before running a delivery process.
6768 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6769 seem to have the "const" qualifier which it has on other OS. I've
6772 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6773 *of the same type* (client or server) with the same public name that an
6774 error should be diagnosed.
6776 9. When Exim looked up a host name for an IP address, but failed to find the
6777 original IP address when looking up the host name (a safety check), it
6778 output the message "<ip address> does not match any IP for NULL", which was
6779 confusing, to say the least. The bug was that the host name should have
6780 appeared instead of "NULL".
6782 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6783 user that is built into the binary, and the -C or -D options is used, root
6784 privilege is dropped before the configuration file is read. In addition,
6785 logging is switched to stderr instead of the normal log files. If the
6786 configuration then re-defines the Exim user, the unprivileged environment
6787 is probably not what is expected, so Exim logs a panic warning message (but
6790 However, if deliver_drop_privilege is set, the unprivileged state may well
6791 be exactly what is intended, so the warning has been cut out in that case,
6792 and Exim is allowed to try to write to its normal log files.
6798 1. smtp_return_error_details was not giving details for temporary sender
6799 or receiver verification errors.
6801 2. Diagnose a configuration error if two authenticators have the same public
6804 3. Exim used not to create the message log file for a message until the first
6805 delivery attempt. This could be confusing when incoming messages were held
6806 for policy or load reasons. The message log file is now created at the time
6807 the message is received, and an initial "Received" line is written to it.
6809 4. The automatically generated man page for command line options had a minor
6810 bug that caused no ill effects; however, a more serious problem was that
6811 the procedure for building the man page automatically didn't always
6812 operate. Consequently, release 4.20 contains an out-of-date version. This
6813 shouldn't happen again.
6815 5. When building Exim with embedded Perl support, the script that builds the
6816 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6817 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6819 6. The freeze_tell option was not being used for messages that were frozen on
6820 arrival, either by an ACL or by local_scan().
6822 7. Added the smtp_incomplete_transaction log selector.
6824 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6825 was accepting AUTH without a new EHLO.
6827 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6828 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6831 10. Logging of TCP/IP connections (when configured) now happens in the main
6832 daemon process instead of the child process, so that the TCP/IP connection
6833 count is more accurate (but it can never be perfect).
6835 11. The use of "drop" in a nested ACL was not being handled correctly in the
6836 outer ACL. Now, if condition failure induced by the nested "drop" causes
6837 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6838 or "require"), the connection is dropped.
6840 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6841 that yield "discard" can now be used with an "accept" or a "discard" verb,
6842 but an error is generated for any others (because I can't see a useful way
6843 to define what should happen).
6845 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6846 are now processed in the same way as lines in the Exim configuration file.
6847 In particular, continuation lines are supported.
6849 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6851 15. Added -ti meaning -t -i.
6853 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6854 domains, and warn by logging if others are found.
6856 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6857 returned from GIFCONF when Exim is trying to find the list of interfaces on
6858 a host. The code in os.c has been modified to copy each ifreq to an aligned
6859 structure in all cases.
6861 Also, in some cases, the returned ifreq's were being copied to a 'struct
6862 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6863 means the last couple of bytes of an IPv6 address could be chopped if the
6864 ifreq contained only a normal sockaddr (14 bytes storage).
6866 18. Named domain lists were not supported in the hosts_treat_as_local option.
6867 An entry such as +xxxx was not recognized, and was treated as a literal
6870 19. Ensure that header lines added by a DATA ACL are included in the reject log
6871 if the ACL subsequently rejects the message.
6873 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6874 MD5 (which is deprecated).
6876 21. When testing a filter file using -bf, Exim was writing a message when it
6877 took the sender from a "From " line in the message, but it was not doing so
6878 when it took $return_path from a Return-Path: header line. It now does.
6880 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6881 with a valid header line field name (a series of printing characters
6882 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6884 23. Changed "disc" in the source to "disk" to conform to the documentation and
6885 the book and for uniformity.
6887 24. Ignore Sendmail's -Ooption=value command line item.
6889 25. When execve() failed while trying to run a command in a pipe transport,
6890 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6891 could be confused with a return value of 69 from the command itself. This
6892 has been changed to 127, the value the shell returns if it is asked to run
6893 a non-existent command. The wording for the related log line suggests a
6894 non-existent command as the problem.
6896 26. If received_header_text expands to an empty string, do not add a Received:
6897 header line to the message. (Well, it adds a token one on the spool, but
6898 marks it "old" so that it doesn't get used or transmitted.)
6900 27. Installed eximstats 1.28 (addition of -nt option).
6902 28. There was no check for failure on the call to getsockname() in the daemon
6903 code. This can fail if there is a shortage of resources on the system, with
6904 ENOMEM, for example. A temporary error is now given on failure.
6906 29. Contrary to the C standard, it seems that in some environments, the
6907 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6908 program. Exim now does this explicitly; it affects the formatting of
6909 timestamps using strftime().
6911 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6912 complaints. I've now initialized all the variables, to avoid this.
6914 32. Header lines added by a system filter were not being "seen" during
6915 transport-time rewrites.
6917 33. The info_callback() function passed to OpenSSL is set up with type void
6918 (*)(SSL *, int, int), as described somewhere. However, when calling the
6919 function (actually a macro) that sets it up, the type void(*)() is
6920 expected. I've put in a cast to prevent warnings from picky compilers.
6922 34. If a DNS black list lookup found a CNAME record, but there were no A
6923 records associated with the domain it pointed at, Exim crashed.
6925 35. If a DNS black list lookup returned more than one A record, Exim ignored
6926 all but the first. It now scans all returned addresses if a particular IP
6927 value is being sought. In this situation, the contents of the
6928 $dnslist_value variable are a list of all the addresses, separated by a
6931 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6932 to accept a host name and all its aliases if the forward lookup for any of
6933 them yielded the IP address of the incoming connection. Now it accepts only
6934 those names whose forward lookup yields the correct IP address. Any other
6935 names are discarded. This closes a loophole whereby a rogue DNS
6936 administrator could create reverse DNS records to break through a
6937 wildcarded host restriction in an ACL.
6939 37. If a user filter or a system filter that ran in a subprocess used any of
6940 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6941 the wrong values were passed to the pipe command ($thisaddress had the
6942 value of $0, $0 had the value of $1, etc). This bug was introduced by
6943 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6945 38. Improved the line breaking for long SMTP error messages from ACLs.
6946 Previously, if there was no break point between 40 and 75 characters, Exim
6947 left the rest of the message alone. Two changes have been made: (a) I've
6948 reduced the minimum length to 35 characters; (b) if it can't find a break
6949 point between 35 and 75 characters, it looks ahead and uses the first one
6950 that it finds. This may give the occasional overlong line, but at least the
6951 remaining text gets split now.
6953 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6954 file descriptors might be low, and that setting 1000 would always raise it.
6955 It turns out that in some environments, the limit is already over 1000 and
6956 that lowering it causes trouble. So now Exim takes care not to decrease it.
6958 40. When delivering a message, the value of $return_path is set to $sender_
6959 address at the start of routing (routers may change the value). By an
6960 oversight, this default was not being set up when an address was tested by
6961 -bt or -bv, which affected the outcome if any router or filter referred to
6964 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6965 log only when "message" or "log_message" are set. However, if one of the
6966 conditions was an address verification, or a call to a nested ACL, the
6967 messages generated by the underlying test were being passed through. This
6968 no longer happens. The underlying message is available in $acl_verify_
6969 message for both "message" and "log_message" expansions, so it can be
6970 passed through if needed.
6972 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6973 new expansion $bh_ to give the encoded byte string without charset
6974 translation. Translation happens only if iconv() is available; HAVE_ICONV
6975 indicates this at build time. HEADERS_CHARSET gives the charset to
6976 translate to; headers_charset can change it in the configuration, and
6977 "headers charset" can change it in an individual filter file.
6979 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6980 that creates RFC 2047 encoded "words" labels them as that charset instead
6981 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6982 expansion operator; (ii) when Exim creates a From: line for a local
6983 message; (iii) when a header line is rewritten to include a "phrase" part.
6985 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6986 buggy, causing it to skip the first lines of messages whose message ID
6987 ended in 'D'. This would not have bitten before Exim release 4.14, because
6988 message IDs were unlikely to end in 'D' before then. The effect was to have
6989 incorrect size information for certain domains.
6991 45. #include "config.h" was missing at the start of the crypt16.c module. This
6992 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6995 46. If there was a timeout during a "random" callout check, Exim treated it as
6996 a failure of the random address, and carried on sending RSET and the real
6997 address. If the delay was just some slowness somewhere, the response to the
6998 original RCPT would be taken as a response to RSET and so on, causing
6999 mayhem of various kinds.
7001 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7002 when I implemented it. It didn't allow for the fact that some option values
7003 may legitimately be negative (e.g. size_addition), and it didn't even do
7004 the right test for positive values.
7006 48. Domain names in DNS records are case-independent. Exim always looks them up
7007 in lower case. Some resolvers return domain names in exactly the case they
7008 appear in the zone file, that is, they may contain uppercase letters. Not
7009 all resolvers do this - some return always lower case. Exim was treating a
7010 change of case by a resolver as a change of domain, similar to a widening
7011 of a domain abbreviation. This triggered its re-routing code and so it was
7012 trying to route what was effectively the same domain again. This normally
7013 caused routing to fail (because the router wouldn't handle the domain
7014 twice). Now Exim checks for this case specially, and just changes the
7015 casing of the domain that it ultimately uses when it transmits the message
7018 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7021 50. If a filter generated a file delivery with a non-absolute name (possible if
7022 no home directory exists for the router), the forbid_file option was not
7025 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7026 the existing equality matching.
7028 52. Exim was using ints instead of ino_t variables in some places where it was
7029 dealing with inode numbers.
7031 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7032 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7033 called TMPDIR, and if it finds it is different, it changes its value.
7035 54. The smtp_printf() function is now made available to local_scan() so
7036 additional output lines can be written before returning. There is also an
7037 smtp_fflush() function to enable the detection of a dropped connection.
7038 The variables smtp_input and smtp_batched_input are exported to
7041 55. Changed the default runtime configuration: the message "Unknown user"
7042 has been removed from the ACL, and instead placed on the localuser router,
7043 using the cannot_route_message feature. This means that any verification
7044 failures that generate their own messages won't get overridden. Similarly,
7045 the "Unrouteable address" message that was in the ACL for unverifiable
7046 relay addresses has also been removed.
7048 56. Added hosts_avoid_esmtp to the smtp transport.
7050 57. The exicyclog script was not checking for the esoteric option
7051 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7052 will work only if exicyclog is run under the appropriate euid.
7054 58. Following a discussion on the list, the rules by which Exim recognises line
7055 endings on incoming messages have been changed. The -dropcr and drop_cr
7056 options are now no-ops, retained only for backwards compatibility. The
7057 following line terminators are recognized: LF CRLF CR. However, special
7058 processing applies to CR:
7060 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7061 nor a local message in the state where . is a terminator.
7063 (ii) If a bare CR is encountered in a header line, an extra space is added
7064 after the line terminator so as not to end the header. The reasoning
7065 behind this is that bare CRs in header lines are most likely either
7066 to be mistakes, or people trying to play silly games.
7068 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7069 was being incorrectly given as 18 bytes larger than it should have been.
7070 This is a VOB (very old bug).
7072 60. This may never have affected anything current, but just in case it has:
7073 When the local host is found other than at the start of a list of hosts,
7074 the local host, those with the same MX, and any that follow, are discarded.
7075 When the list in question was part of a longer list of hosts, the following
7076 hosts (not currently being processed) were also being discarded. This no
7077 longer happens. I'm not sure if this situation could ever has previously
7080 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7083 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7084 header. This is something that is recommended in a new Internet Draft, and
7085 is something that is documented as being done by Sendmail. There are two
7086 possible values. For messages generated by the autoreply transport, Exim
7089 Auto-Submitted: auto-replied
7091 whereas for all other generated messages (e.g. bounces) it adds
7093 Auto-Submitted: auto-generated
7095 63. The "personal" condition in filters now includes a test for the
7096 Auto-Submitted: header. If it contains the string "auto-" the message it
7097 not considered personal.
7099 64. Added rcpt_include_affixes as a generic transport option.
7101 65. Added queue_only_override (default true).
7103 66. Added the syslog_duplication option.
7105 67. If what should have been the first header line of a message consisted of
7106 a space followed by a colon, Exim was mis-interpreting it as a header line.
7107 It isn't of course - it is syntactically invalid and should therefore be
7108 treated as the start of the message body. The misbehaviour could have
7109 caused a number of strange effects, including loss of data in subsequent
7110 header lines, and spool format errors.
7112 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7113 client host had authenticated. This control can now be exercised by an ACL
7114 for more flexibility.
7116 69. By default, callouts do not happen when testing with -bh. There is now a
7117 variant, -bhc, which does actually run the callout code, including
7118 consulting and updating the callout cache.
7120 70. Added support for saslauthd authentication, courtesy of Alexander
7123 71. If statvfs() failed on the spool or log directories while checking their
7124 size for availability, Exim confusingly gave the error "space shortage".
7125 Furthermore, in debugging mode it crashed with a floating point exception.
7126 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7127 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7128 serious problem, Exim now writes to the main and panic logs when this
7129 happens, with details of the failure. It then refuses to accept the
7130 incoming message, giving the message "spool directory problem" or "log
7131 directory problem" with a 421 code for SMTP messages.
7133 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7134 0, 1, and 2 exist, because some OS complain for execs without them (see
7135 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7136 descriptors. However, the code omitted to check that the open succeeded,
7137 causing mysterious errors if for some reason the permissions on /dev/null
7138 got screwed. Now Exim writes a message to the main and panic logs, and
7139 bombs out if it can't open /dev/null.
7141 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7142 interact so that it is all more flexible. It is supposed to remain
7143 backwards compatible. Also added extra_local_interfaces.
7145 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7146 to bomb out with an assertion failure - to the client this appears as a
7147 connection drop. This problem occurs in the part of the code that was taken
7148 from the Samba project. Fortunately, the assertion is in a very simple
7149 function, so I have fixed this by reproducing the function inline in the
7150 one place where it is called, and arranging for authentication to fail
7151 instead of killing the process with assert().
7153 75. The SPA client code was not working when the server requested OEM rather
7154 than Unicode encoding.
7156 76. Added code to make require_files with a specific uid setting more usable in
7157 the case where statting the file as root fails - usually a non-root-mounted
7158 NFS file system. When this happens and the failure is EACCES, Exim now
7159 forks a subprocess and does the per-uid checking as the relevant uid.
7161 77. Added process_log_path.
7163 78. If log_file_path was not explicitly set, a setting of check_log_space or
7164 check_log_inodes was ignored.
7166 79. If a space check for the spool or log partitions fails, the incident is now
7167 logged. Of course, in the latter case the data may get lost...
7169 80. Added the %p formatting code to string_format() so that it can be used to
7170 print addresses in debug_print(). Adjusted all the address printing in the
7171 debugging in store.c to use %p rather than %d.
7173 81. There was a concern that a line of code in smtp_in.c could overflow a
7174 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7175 initially expressed, the concern was not well-founded, because trailing
7176 spaces are removed early. However, if the trailing spaces were followed by
7177 a NULL, they did not get removed, so the overflow was possible. Two fixes
7180 (a) I re-wrote the offending code in a cleaner fashion.
7181 (b) If an incoming SMTP command contains a NULL character, it is rejected
7184 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7185 runs initgroups(), so that if the Exim user is in any additional groups,
7186 they will be used during message reception.
7192 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob