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/01 Remove code calling the customisable local_scan function, unless a new
12 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
14 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
15 non-signal-safe functions being used.
17 JH/03 Bug 2269: When presented with a received message having a stupidly large
18 number of DKIM-Signature headers, disable DKIM verification to avoid
19 a resource-consumption attack. The limit is set at twenty.
21 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
22 report of oldest_pass in ${authres } in consequence, and separate out
23 some descriptions of reasons for verification fail.
25 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
26 files in the spool were present and unlocked. A queue-runner could spot
27 them, resulting in a duplicate delivery. Fix that by doing the unlock
28 after the unlink. Investigation by Tim Stewart. Take the opportunity to
29 add more error-checking on spoolfile handling while that code is being
32 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
33 No known attacks, no CVE, this is defensive hardening.
39 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
40 When redis_servers is set to a list of > 1 element, and the Redis servers
41 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
42 case of MOVED into a DEFER case instead, thus moving the query onto the
43 next server in the list. For a cluster of N elements, all N servers must
44 be defined in redis_servers.
46 GF/02 Catch and remove uninitialized value warning in exiqsumm
47 Check for existence of @ARGV before looking at $ARGV[0]
49 JH/01 Replace the store_release() internal interface with store_newblock(),
50 which internalises the check required to safely use the old one, plus
51 the allocate and data copy operations duplicated in both (!) of the
54 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
55 modifier. This matches the restriction on the commandline.
57 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
58 Previously only the last row was returned.
60 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
61 we assumed that tags in the header were well-formed, and parsed the
62 element content after inspecting only the first char of the tag.
63 Assumptions at that stage could crash the receive process on malformed
66 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
67 While running the DKIM ACL we operate on the Permanent memory pool so that
68 variables created with "set" persist to the DATA ACL. Also (at any time)
69 DNS lookups that fail create cache records using the Permanent pool. But
70 expansions release any allocations made on the current pool - so a dnsdb
71 lookup expansion done in the DKIM ACL releases the memory used for the
72 DNS negative-cache, and bad things result. Solution is to switch to the
73 Main pool for expansions.
74 While we're in that code, add checks on the DNS cache during store_reset,
75 active in the testsuite.
76 Problem spotted, and debugging aided, by Wolfgang Breyha.
78 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
79 When none of the hosts presented to a transport match an already-open
80 connection, close it and proceed with the list. Previously we would
81 queue the message. Spotted by Lena with Yahoo, probably involving
84 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
85 Previously a spurious "250 OK id=" response was appended to the proper
88 JH/08 The "support for" informational output now, which built with Content
89 Scanning support, has a line for the malware scanner interfaces compiled
90 in. Interface can be individually included or not at build time.
92 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
93 by the template makefile "src/EDITME". The "STREAM" support for an older
94 ClamAV interface method is removed.
96 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
97 rows affected is given instead).
99 JH/11 The runtime Berkeley DB library version is now additionally output by
100 "exim -d -bV". Previously only the compile-time version was shown.
102 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
103 SMTP connection. Previously, when one had more receipients than the
104 first, an abortive onward connection was made. Move to full support for
105 multiple onward connections in sequence, handling cutthrough connection
106 for all multi-message initiating connections.
108 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
109 routers. Previously, a multi-recipient message would fail to match the
110 onward-connection opened for the first recipient, and cause its closure.
112 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
113 a timeout on read on a GnuTLS initiating connection, resulting in the
114 initiating connection being dropped. This mattered most when the callout
115 was marked defer_ok. Fix to keep the two timeout-detection methods
118 JH/15 Relax results from ACL control request to enable cutthrough, in
119 unsupported situations, from error to silently (except under debug)
120 ignoring. This covers use with PRDR, frozen messages, queue-only and
123 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
125 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
126 metadata, resulting in a crash in free().
128 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
129 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
130 Broken also in d185889f4, with init system revamp.
132 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
133 Previously we abruptly closed the connection after reading a malware-
134 found indication; now we go on to read the "scan ok" response line,
137 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
138 ACL. Previously, a crash would result.
140 JH/19 Speed up macro lookups during configuration file read, by skipping non-
141 macro text after a replacement (previously it was only once per line) and
142 by skipping builtin macros when searching for an uppercase lead character.
144 JH/20 DANE support moved from Experimental to mainline. The Makefile control
145 for the build is renamed.
147 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
148 was allocated for every new TLS startup, meaning one per message. Fix
149 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
151 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
152 reported the original. Fix to report (as far as possible) the ACL
153 result replacing the original.
155 JH/23 Fix memory leak during multi-message connections using STARTTLS under
156 OpenSSL. Certificate information is loaded for every new TLS startup,
157 and the resources needed to be freed.
159 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
161 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
164 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
165 DATA response info to the (existing) per-recipient response info for
166 the "C=" log element. It can have useful tracking info from the
167 destination system. Patch from Simon Arlott.
169 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
170 length value. Previously this would segfault.
172 HS/02 Support Avast multiline protoocol, this allows passing flags to
173 newer versions of the scanner.
175 JH/28 Ensure that variables possibly set during message acceptance are marked
176 dead before release of memory in the daemon loop. This stops complaints
177 about them when the debug_store option is enabled. Discovered specifically
178 for sender_rate_period, but applies to a whole set of variables.
179 Do the same for the queue-runner and queue-list loops, for variables set
180 from spool message files. Do the same for the SMTP per-message loop, for
181 certain variables indirectly set in ACL operations.
183 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
184 as a multi-recipient message from a mailinglist manager). The coding had
185 an arbitrary cutoff number of characters while checking for more input;
186 enforced by writing a NUL into the buffer. This corrupted long / fast
187 input. The problem was exposed more widely when more pipelineing of SMTP
188 responses was introduced, and one Exim system was feeding another.
189 The symptom is log complaints of SMTP syntax error (NUL chars) on the
190 receiving system, and refused recipients seen by the sending system
191 (propating to people being dropped from mailing lists).
192 Discovered and pinpointed by David Carter.
194 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
195 replaced by the ${authresults } expansion.
197 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
199 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
200 allows proper process termination in container environments.
202 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
203 Previously the "final dot" had a newline after it; ensure it is CR,LF.
205 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
206 and "err_perm", deprecated since 4.83 when the RFC-defined words
207 "temperror" and "permerror" were introduced.
209 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
210 transport-filters or DKIM-signing. The restriction was lost in the
211 consolidation of verify-callout and delivery SMTP handling.
212 Extend the restriction to also cover ARC-signing.
214 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
215 in defer=pass mode supply a 450 to the initiator. Previously the message
218 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
219 tls_require_ciphers is used as before.
221 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
222 "pass_unscanned". Only tmpfails from the scanner are written to
223 the paniclog, as they may require admin intervention (permission
224 denied, license issues). Other scanner errors (like decompression
225 bombs) do not cause a paniclog entry.
227 JH/36 Fix reinitialisation of DKIM logging variable between messages.
228 Previously it was possible to log spurious information in receive log
231 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
232 triggered odd behaviour from Outlook Express clients.
234 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
237 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
238 since the IETF WG has not yet settled on that versus the original
239 "bare" representation.
241 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
242 Previously the millisecond value corrupted the output.
243 Fix also for syslog_pid=no and log_selector +pid, for which the pid
244 corrupted the output.
250 JH/01 Rework error string handling in TLS interface so that the caller in
251 more cases is responsible for logging. This permits library-sourced
252 string to be attached to addresses during delivery, and collapses
253 pairs of long lines into single ones.
255 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
256 during configuration. Wildcards are allowed and expanded.
258 JH/02 Rework error string handling in DKIM to pass more info back to callers.
259 This permits better logging.
261 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
262 do not close it down and have the child transport start it up again on
263 the passed-on TCP connection. Instead, proxy the child (and any
264 subsequent ones) for TLS via a unix-domain socket channel. Logging is
265 affected: the continued delivery log lines do not have any DNSSEC, TLS
266 Certificate or OCSP information. TLS cipher information is still logged.
268 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
269 identical IP addresses on different listening ports. Will also affect
272 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
273 add noisy ifdef guards to special-case this sillyness.
274 Patch from Bernd Kuhls.
276 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
277 than 255 are no longer allowed.
279 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
280 Disable the session-cache too, which might reduce our load. Since we
281 currrectly use a new context for every connection, both as server and
282 client, there is no benefit for these.
283 GnuTLS appears to not support tickets server-side by default (we don't
284 call gnutls_session_ticket_enable_server()) but client side is enabled
285 by default on recent versions (3.1.3 +) unless the PFS priority string
288 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
289 <https://reproducible-builds.org/specs/source-date-epoch/>.
291 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
292 the check for any unsuccessful recipients did not notice the limit, and
293 erroneously found still-pending ones.
295 JH/08 Pipeline CHUNKING command and data together, on kernels that support
296 MSG_MORE. Only in-clear (not on TLS connections).
298 JH/09 Avoid using a temporary file during transport using dkim. Unless a
299 transport-filter is involved we can buffer the headers in memory for
300 creating the signature, and read the spool data file once for the
301 signature and again for transmission.
303 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
304 4.77 as the kernel support then wasn't solid, having issues in 64bit
305 mode. Now, it's been long enough. Add support for FreeBSD also.
307 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
308 case where the routing stage had gathered several addresses to send to
309 a host before calling the transport for the first, we previously failed
310 to close down TLS in the old transport process before passing the TCP
311 connection to the new process. The new one sent a STARTTLS command
312 which naturally failed, giving a failed delivery and bloating the retry
313 database. Investigation and fix prototype from Wolfgang Breyha.
315 JH/12 Fix check on SMTP command input synchronisation. Previously there were
316 false-negatives in the check that the sender had not preempted a response
317 or prompt from Exim (running as a server), due to that code's lack of
318 awareness of the SMTP input buffering.
320 PP/04 Add commandline_checks_require_admin option.
321 Exim drops privileges sanely, various checks such as -be aren't a
322 security problem, as long as you trust local users with access to their
323 own account. When invoked by services which pass untrusted data to
324 Exim, this might be an issue. Set this option in main configuration
325 AND make fixes to the calling application, such as using `--` to stop
328 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
329 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
330 responses to those, into a single TLS record each way (this usually means
331 a single packet). As a side issue, smtp_enforce_sync now works on TLS
334 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
335 affects you only if you're dancing at the edge of the param size limits.
336 If you are, and this message makes sense to you, then: raise the
337 configured limit or use OpenSSL 1.1. Nothing we can do for older
340 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
341 cmdline element to get the documented default one. Previously it was
344 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
345 are unsuable for non-message-specific reasons - eg. connection timeout,
346 banner-time rejection.
348 JH/16 Fix logging of delivery remote port, when specified by router, under
351 PP/06 Repair manualroute's ability to take options in any order, even if one
352 is the name of a transport.
355 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
357 JH/17 Change the list-building routines interface to use the expanding-string
358 triplet model, for better allocation and copying behaviour.
360 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
361 Previously it was constructed the first time a possibly-matching string
362 was met in the configuration file input during startup; now it is done
365 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
366 compatible one, to avoid the (poorly documented) possibility of a config
367 file in the working directory redirecting the DB files, possibly correpting
368 some existing file. CVE-2017-10140 assigned for BDB.
370 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
371 cache-hot. Previously, although the result was properly cached, the
372 initial verify call returned a defer.
374 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
375 the main verify for receipient in uncached-mode.
377 JH/22 Retire historical build files to an "unsupported" subdir. These are
378 defined as "ones for which we have no current evidence of testing".
380 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
381 if present. Previously it was ignored.
383 JH/24 Start using specified-initialisers in C structure init coding. This is
384 a C99 feature (it's 2017, so now considered safe).
386 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
387 if was a fixed-sized field and bitmask ops via macros; it is now more
390 PP/07 GitHub PR 56: Apply MariaDB build fix.
391 Patch provided by Jaroslav Škarvada.
393 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
394 during Coverity cleanups [4.87 JH/47]
395 Diagnosis and fix provided by Michael Fischer v. Mollard.
397 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
398 the right size to place the terminating semicolon on its own folded
399 line, the header hash was calculated to an incorrect value thanks to
400 the (relaxed) space the fold became.
402 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
403 and confused the parent.
405 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
406 which could crash as a result. This could lead to undeliverable messages.
408 JH/28 Logging: "next input sent too soon" now shows where input was truncated
411 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
412 matters on fast-turnover and PID-randomising systems, which were getting
413 out-of-order delivery.
415 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
416 a possibly-overlapping copy. The symptom was that "Remote host closed
417 connection in response to HELO" was logged instead of the actual 4xx
420 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
421 Previously only that bufferd was discarded, resulting in SYMTP command
424 JH/32 DKIM: when a message has multiple signatures matching an identity given
425 in dkim_verify_signers, run the dkim acl once for each. Previously only
426 one run was done. Bug 2189.
428 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
429 "panic the current process" to "deliberately defer". The panic log is
430 still written with the problem list name; the mail and reject logs now
431 get a temp-reject line for the message that was being handled, saying
432 something like "domains check lookup or other defer". The SMTP 451
433 message is still "Temporary local problem".
435 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
436 A crafted sequence of BDAT commands could result in in-use memory beeing
437 freed. CVE-2017-16943.
439 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
440 from SMTP input. Previously it was always done; now only done for DATA
441 and not BDAT commands. CVE-2017-16944.
443 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
444 to the message (such as an overlong header line). Previously this was
445 not done and we did not exit BDAT mode. Followon from the previous item
446 though a different problem.
452 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
453 than -2003 did; needs libidn2 in addition to libidn.
455 JH/02 The path option on a pipe transport is now expanded before use.
457 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
458 Patch provided by "Björn", documentation fix added too.
460 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
461 missing a wire-to-host endian conversion.
463 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
464 close after a BDAT command line could be taken as a following command,
465 giving a synch failure. Fix by only checking for synch immediately
466 before acknowledging the chunk.
468 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
469 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
470 macro. Patches provided by Josh Soref.
472 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
473 Previously we did not; the RFC seems ambiguous and VRFY is not listed
474 by IANA as a service extension. However, John Klensin suggests that we
477 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
478 the dkim code may be unix-mode line endings rather than smtp wire-format
479 CRLF, so prepend a CR to any bare LF.
481 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
482 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
484 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
485 the first were themselves being wrongly included in the feed into dkim
486 processing; with most chunk sizes in use this resulted in an incorrect
487 body hash calculated value.
489 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
490 DKIM signature block, for verification. Although advised against by
491 standards it is specifically not ruled illegal.
493 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
495 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
496 missing a body hash (the bh= tag).
498 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
499 It seems that HAProxy sends the Proxy Protocol information in clear and
500 only then does a TLS startup, so do the same.
502 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
503 TCP connections (such as for Spamd) unless the daemon successfully set
504 Fast Open mode on its listening sockets. This fixes breakage seen on
505 too-old kernels or those not configured for Fast Open, at the cost of
506 requiring both directions being enabled for TFO, and TFO never being used
507 by non-daemon-related Exim processes.
509 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
510 endings, at least on the first header line. Try to canonify any that get
511 past that check, despite the cost.
513 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
514 now limited to an arbitrary five deep, while parsing addresses with the
515 strip_excess_angle_brackets option enabled.
517 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
518 instead leave the unprompted TLS handshake in socket buffer for the
519 TLS library to consume.
521 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
523 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
525 JH/16 Drop variables when they go out of scope. Memory management drops a whole
526 region in one operation, for speed, and this leaves assigned pointers
527 dangling. Add checks run only under the testsuite which checks all
528 variables at a store-reset and panics on a dangling pointer; add code
529 explicitly nulling out all the variables discovered. Fixes one known
530 bug: a transport crash, where a dangling pointer for $sending_ip_address
531 originally assigned in a verify callout, is re-used.
533 PP/06 Drop '.' from @INC in various Perl scripts.
535 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
537 PP/08 Reduce a number of compilation warnings under clang; building with
538 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
539 should be warning-free.
541 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
543 HS/01 Fix portability problems introduced by PP/08 for platforms where
544 realloc(NULL) is not equivalent to malloc() [SunOS et al].
546 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
547 chunk. This allows us to accept broken chunked messages. We need a more
548 general solution here.
550 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
551 already-broken messages in the queue.
553 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
555 JH/19 Fix reference counting bug in routing-generated-address tracking.
561 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
562 supports it and a size is available (ie. the sending peer gave us one).
564 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
565 years of being deprecated). The replacements are the ACLs
566 acl_smtp_mime and acl_not_smtp_mime.
568 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
569 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
570 or even an in-clear connection were permitted. Now, if the host lookup
571 was dnssec and dane was requested then the host is only used if the
572 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
573 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
574 if one fails this test.
575 This means that a poorly-configured remote DNS will make it incommunicado;
576 but it protects against a DNS-interception attack on it.
578 JH/04 Bug 1810: make continued-use of an open smtp transport connection
579 non-noisy when a race steals the message being considered.
581 JH/05 If main configuration option tls_certificate is unset, generate a
582 self-signed certificate for inbound TLS connections.
584 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
585 in rewrites and routers.
587 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
588 and logged a warning sing 4.83; now they are a configuration file error.
590 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
591 (lacking @domain). Apply the same qualification processing as RCPT.
593 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
595 JH/10 Support ${sha256:} applied to a string (as well as the previous
598 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
599 a cutthrough deliver is pending, as we always want to make a connection.
600 This also avoids re-routing the message when later placing the cutthrough
601 connection after a verify cache hit.
602 Do not update it with the verify result either.
604 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
605 when routing results in more than one destination address.
607 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
608 signing (which inhibits the cutthrough capability). Previously only
609 the presence of an option was tested; now an expansion evaluating as
610 empty is permissible (obviously it should depend only on data available
611 when the cutthrough connection is made).
613 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
614 the relevant preceding SMTP command did not note the pipelining mode.
616 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
617 Previously they were not counted.
619 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
620 as one having no matching records. Previously we deferred the message
621 that needed the lookup.
623 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
624 distinguished as "(=".
626 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
627 for missing MX records. Previously it only worked for missing A records.
629 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
631 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
632 after the data-go-ahead and data-ack. Patch from Jason Betts.
634 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
635 even for a "none" policy. Patch from Tony Meyer.
637 JH/22 Fix continued use of a connection for further deliveries. If a port was
638 specified by a router, it must also match for the delivery to be
641 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
642 When one of the recipients of a message was unsuitable for the connection
643 (has no matching addresses), we lost track of needing to mark it
644 deferred. As a result mail would be lost.
646 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
648 JH/25 Decoding ACL controls is now done using a binary search; the source code
649 takes up less space and should be simpler to maintain. Merge the ACL
650 condition decode tables also, with similar effect.
652 JH/26 Fix problem with one_time used on a redirect router which returned the
653 parent address unchanged. A retry would see the parent address marked as
654 delivered, so not attempt the (identical) child. As a result mail would
657 JH/27 Fix a possible security hole, wherein a process operating with the Exim
658 UID can gain a root shell. Credit to http://www.halfdog.net/ for
659 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
662 JH/28 Enable {spool,log} filesystem space and inode checks as default.
663 Main config options check_{log,spool}_{inodes,space} are now
664 100 inodes, 10MB unless set otherwise in the configuration.
666 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
667 Previously it only applied to the main-section connection policy
670 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
672 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
673 by me. Added RFC7919 DH primes as an alternative.
675 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
676 are not in the system include path.
678 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
679 GnuTLS, when a session startup failed (eg because the client disconnected)
680 Exim did stdio operations after fclose. This was exposed by a recent
681 change which nulled out the file handle after the fclose.
683 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
684 signed directly by the cert-signing cert, rather than an intermediate
685 OCSP-signing cert. This is the model used by LetsEncrypt.
687 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
689 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
690 an incoming connection.
692 HS/02 Bug 1802: Do not half-close the connection after sending a request
695 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
696 fallback to "prime256v1".
698 JH/34 SECURITY: Use proper copy of DATA command in error message.
699 Could leak key material. Remotely exploitable. CVE-2016-9963.
705 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
706 and 3.4.4 - once the server is enabled to respond to an OCSP request
707 it does even when not requested, resulting in a stapling non-aware
708 client dropping the TLS connection.
710 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
711 support variable-length bit vectors. No functional change.
713 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
714 The I= interface field on outgoing lines is now after the H= remote
715 host field, same as incoming lines. There is a separate
716 outgoing_interface log selector which allows you to disable the
719 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
720 If not running log_selector +smtp_connection the mainlog would be held
721 open indefinitely after a "too many connections" event, including to a
722 deleted file after a log rotate. Leave the per net connection logging
723 leaving it open for efficiency as that will be quickly detected by the
724 check on the next write.
726 HS/01 Bug 1671: Fix post transport crash.
727 Processing the wait-<transport> messages could crash the delivery
728 process if the message IDs didn't exist for some reason. When
729 using 'split_spool_directory=yes' the construction of the spool
730 file name failed already, exposing the same netto behaviour.
732 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
733 mime_regex ACL conditions.
735 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
736 to DSN fail messages (bounces): remote IP, remote greeting, remote response
737 to HELO, local diagnostic string.
739 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
740 log line to debug. Even when configured with a tls authenticator many
741 client connections are expected to not authenticate in this way, so
742 an authenticate fail is not an error.
744 HS/02 Add the Exim version string to the process info. This way exiwhat
745 gives some more detail about the running daemon.
747 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
748 matter for fast-change records such as DNSBLs.
750 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
751 retry record, even if constant. There may be multiple transports with
752 different interface settings and the retry behaviour needs to be kept
755 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
757 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
759 JH/10 Bug 840: fix log_defer_output option of pipe transport
761 JH/11 Bug 830: use same host for all RCPTS of a message, even under
762 hosts_randomize. This matters a lot when combined with mua_wrapper.
764 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
765 ${quote_pgsql:<string>} operator.
767 JH/13 Bug 1708: avoid misaligned access in cached lookup.
769 JH/14 Change header file name for freeradius-client. Relevant if compiling
770 with Radius support; from the Gentoo tree and checked under Fedora.
772 JH/15 Bug 1712: Introduce $prdr_requested flag variable
774 JH/16 Bug 1714: Permit an empty string as expansion result for transport
775 option transport_filter, meaning no filtering.
777 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
779 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
780 defaults to "*" (all hosts). The variable is now available when not built
781 with TLS, default unset, mainly to enable keeping the testsuite sane.
782 If a server certificate is not supplied (via tls_certificate) an error is
783 logged, and clients will find TLS connections fail on startup. Presumably
784 they will retry in-clear.
785 Packagers of Exim are strongly encouraged to create a server certificate
786 at installation time.
788 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
789 with the $config_file variable.
791 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
792 in transport context, after the attempt, and per-recipient. The latter type
793 is per host attempted. The event data is the error message, and the errno
794 information encodes the lookup type (A vs. MX) used for the (first) host,
795 and the trailing two digits of the smtp 4xx response.
797 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
798 to write to mainlog (or rejectlog, paniclog) in the window between file
799 creation and permissions/ownership being changed. Particularly affects
800 installations where exicyclog is run as root, rather than exim user;
801 result is that the running daemon panics and dies.
803 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
805 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
806 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
807 "pri" and "weight". Note that the previous implicit priority given by the
808 list order is no longer honoured.
810 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
813 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
814 by defining SUPPORT_SOCKS.
816 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
817 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
818 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
819 variables are renamed to proxy_{local,external}_{address,port}.
821 JH/27 Move Internationalisation support from Experimental to mainline, enabled
822 for a build by defining SUPPORT_I18N
824 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
825 of the query string, and make ${quote_redis:} do that quoting.
827 JH/29 Move Events support from Experimental to mainline, enabled by default
828 and removable for a build by defining DISABLE_EVENT.
830 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
832 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
833 cached by the daemon.
835 JH/32 Move Redis support from Experimental to mainline, enabled for a build
836 by defining LOOKUP_REDIS. The libhiredis library is required.
838 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
839 keys are given for lookup.
841 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
842 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
843 only supported when built with TLS support. The PolarSSL SHA routines
844 are still used when the TLS library is too old for convenient support.
846 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
847 openssl_options), for security. OpenSSL forces this from version 1.1.0
848 server-side so match that on older versions.
850 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
851 allocation for $value could be released as the expansion processing
852 concluded, but leaving the global pointer active for it.
854 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
855 and to use the domains and local_parts ACL conditions.
857 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
858 incorrectly not doubled on cutthrough transmission, hence seen as a
859 body-termination at the receiving system - resulting in truncated mails.
860 Commonly the sender saw a TCP-level error, and retransmitted the message
861 via the normal store-and-forward channel. This could result in duplicates
862 received - but deduplicating mailstores were liable to retain only the
863 initial truncated version.
865 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
867 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
869 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
870 we're in there, support oversigning also; bug 1309.
872 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
874 HS/04 Add support for keep_environment and add_environment options.
876 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
877 either intentional arithmetic overflow during PRNG, or testing config-
880 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
881 delivery resulted in actual delivery. Cancel cutthrough before DATA
884 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
885 rejects a recipient: pass the reject to the originator.
887 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
888 Many were false-positives and ignorable, but it's worth fixing the
891 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
892 for the new environment-manipulation done at startup. Move the routines
893 from being local to tls.c to being global via the os.c file.
895 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
896 an extract embedded as result-arg for a map, the first arg for extract
897 is unavailable so we cannot tell if this is a numbered or keyed
898 extraction. Accept either.
904 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
907 JH/02 The smtp transport option "multi_domain" is now expanded.
909 JH/03 The smtp transport now requests PRDR by default, if the server offers
912 JH/04 Certificate name checking on server certificates, when exim is a client,
913 is now done by default. The transport option tls_verify_cert_hostnames
914 can be used to disable this per-host. The build option
915 EXPERIMENTAL_CERTNAMES is withdrawn.
917 JH/05 The value of the tls_verify_certificates smtp transport and main options
918 default to the word "system" to access the system default CA bundle.
919 For GnuTLS, only version 3.0.20 or later.
921 JH/06 Verification of the server certificate for a TLS connection is now tried
922 (but not required) by default. The verification status is now logged by
923 default, for both outbound TLS and client-certificate supplying inbound
926 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
929 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
930 Status Notification (bounce) messages are now MIME format per RFC 3464.
931 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
932 under the control of the dsn_advertise_hosts option, and routers may
933 have a dsn_lasthop option.
935 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
936 default, modifiable by a malware= option. The list separator for
937 the options can now be changed in the usual way. Bug 68.
939 JH/10 The smtp_receive_timeout main option is now expanded before use.
941 JH/11 The incoming_interface log option now also enables logging of the
942 local interface on delivery outgoing connections.
944 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
945 if the interface and destination host and port all match.
947 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
950 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
951 Patch from Andrew Lewis.
953 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
954 now supports optional time-restrictions, weighting, and priority
955 modifiers per server. Patch originally by <rommer@active.by>.
957 JH/16 The spamd_address main option now supports a mixed list of local
958 and remote servers. Remote servers can be IPv6 addresses, and
959 specify a port-range.
961 JH/17 Bug 68: The spamd_address main option now supports an optional
962 timeout value per server.
964 JH/18 Bug 1581: Router and transport options headers_add/remove can
965 now have the list separator specified.
967 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
970 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
973 JH/21 Support for the A6 type of dns record is withdrawn.
975 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
976 rather than the verbs used.
978 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
979 from 255 to 1024 chars.
981 JH/24 Verification callouts now attempt to use TLS by default.
983 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
984 are generic router options now. The defaults didn't change.
986 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
987 Original patch from Alexander Shikoff, worked over by JH.
989 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
990 files if ZCAT_COMMAND is not executable.
992 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
994 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
996 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
997 Normally benign, it bites when the pair was led to by a CNAME;
998 modern usage is to not canonicalize the domain to a CNAME target
999 (and we were inconsistent anyway for A-only vs AAAA+A).
1001 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1003 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1004 when evaluating $sender_host_dnssec.
1006 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1007 $sender_helo_dnssec variable.
1009 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1011 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1013 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1015 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1016 documented as working, but never had. Support all but $spam_report.
1018 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1019 added for tls authenticator.
1021 HS/03 Add perl_taintmode main config option
1027 TL/01 When running the test suite, the README says that variables such as
1028 no_msglog_check are global and can be placed anywhere in a specific
1029 test's script, however it was observed that placement needed to be near
1030 the beginning for it to behave that way. Changed the runtest perl
1031 script to read through the entire script once to detect and set these
1032 variables, reset to the beginning of the script, and then run through
1033 the script parsing/test process like normal.
1035 TL/02 The BSD's have an arc4random API. One of the functions to induce
1036 adding randomness was arc4random_stir(), but it has been removed in
1037 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1038 function when detected.
1040 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1041 cause callback expansion.
1043 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1044 syntax errors in an expansion can be treated as a string instead of
1045 logging or causing an error, due to the internal use of bool_lax
1046 instead of bool when processing it.
1048 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1049 server certificates when making smtp deliveries.
1051 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1053 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1055 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1057 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1058 Merged patch from Sebastian Wiedenroth.
1060 JH/05 Fix results-pipe from transport process. Several recipients, combined
1061 with certificate use, exposed issues where response data items split
1062 over buffer boundaries were not parsed properly. This eventually
1063 resulted in duplicates being sent. This issue only became common enough
1064 to notice due to the introduction of connection certificate information,
1065 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1067 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1068 size buffer was used, resulting in syntax errors when an expansion
1071 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1072 version 3.3.6 or later.
1074 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1075 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1076 both become "event_action", the variables become $event_name, $event_data
1077 and $event_defer_errno. There is a new variable $verify_mode, usable in
1078 routers, transports and related events. The tls:cert event is now also
1079 raised for inbound connections, if the main configuration event_action
1082 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1083 early OCSP support, but no stapling (appears to be less than 1.0.0).
1085 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1086 server certificate names available under the smtp transport option
1087 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1090 JH/10 Time-related extraction expansions from certificates now use the main
1091 option "timezone" setting for output formatting, and are consistent
1092 between OpenSSL and GnuTLS compilations. Bug 1541.
1094 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1095 encoded parameter in the incoming message. Bug 1558.
1097 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1098 include certificate info, eximon was claiming there were spoolfile
1101 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1103 JH/14 Log delivery-related information more consistently, using the sequence
1104 "H=<name> [<ip>]" wherever possible.
1106 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1107 are problematic for Debian distribution, omit them from the release
1110 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1112 JH/16 Fix string representation of time values on 64bit time_t architectures.
1115 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1116 output list separator was used.
1121 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1122 checkers that were complaining about end of non-void function with no
1125 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1126 This was a regression introduced in 4.83 by another bugfix.
1128 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1130 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1131 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1137 TF/01 Correctly close the server side of TLS when forking for delivery.
1139 When a message was received over SMTP with TLS, Exim failed to clear up
1140 the incoming connection properly after forking off the child process to
1141 deliver the message. In some situations the subsequent outgoing
1142 delivery connection happened to have the same fd number as the incoming
1143 connection previously had. Exim would try to use TLS and fail, logging
1144 a "Bad file descriptor" error.
1146 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1147 utilities have not been installed.
1149 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1150 temporary space as the ACL may create new global variables.
1152 TL/01 LDAP support uses per connection or global context settings, depending
1153 upon the detected version of the libraries at build time.
1155 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1156 to extract and use the src ip:port in logging and expansions as if it
1157 were a direct connection from the outside internet. PPv2 support was
1158 updated based on HAProxy spec change in May 2014.
1160 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1162 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1163 Properly escape header and check for NULL return.
1165 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1168 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1170 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1171 characters in header names, implemented as a verify condition.
1172 Contributed by Michael Fischer v. Mollard.
1174 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1175 results permerror and temperror. Previous values are deprecated but
1176 still accepted. In a future release, err_perm and err_temp will be
1177 completely removed, which will be a backward incompatibility if the
1178 ACL tests for either of these two old results. Patch contributed by
1179 user bes-internal on the mailing list.
1181 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1183 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1184 selectors, in both main and reject logs.
1186 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1189 JH/07 Add malware type "sock" for talking to simple daemon.
1191 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1193 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1194 routers/transports under cutthrough routing.
1196 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1197 numbers. Touch up "bool" conditional to keep the same definition.
1199 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1201 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1203 JH/12 Expand items in router/transport headers_add or headers_remove lists
1204 individually rather than the list as a whole. Bug 1452.
1206 Required for reasonable handling of multiple headers_ options when
1207 they may be empty; requires that headers_remove items with embedded
1208 colons must have them doubled (or the list-separator changed).
1210 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1211 view the policy declared in the DMARC record. Currently, $dmarc_status
1212 is a combined value of both the record presence and the result of the
1215 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1217 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1218 dnslookup router and the smtp transport (applying to the forward
1221 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1222 of ldap servers used for a specific lookup. Patch provided by Heiko
1225 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1226 New variable $lookup_dnssec_authenticated for observability.
1228 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1229 Patch submitted by Lars Timman.
1231 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1233 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1234 Requires trusted mode and valid format message id, aborts otherwise.
1235 Patch contributed by Heiko Schlichting.
1237 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1238 certextract with support for various fields. Bug 1358.
1240 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1241 is requested by default, modifiable by smtp transport option
1244 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1245 operate on certificate variables to give certificate fingerprints
1246 Also new ${sha256:cert_variable}.
1248 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1250 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1251 Christian Aistleitner.
1253 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1255 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1256 file. Patch from Wolfgang Breyha.
1258 JH/25 Expand the coverage of the delivery $host and $host_address to
1259 client authenticators run in verify callout. Bug 1476.
1261 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1262 align with daemon_smtp_ports. Bug 72.
1264 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1265 support and error reporting did not work properly.
1267 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1268 and is readable. Patch from Andrew Colin Kissa.
1270 TL/14 Enhance documentation of ${run expansion and how it parses the
1271 commandline after expansion, particularly in the case when an
1272 unquoted variable expansion results in an empty value.
1274 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1276 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1277 by renaming away from it. Addresses GH issue 15, reported by
1280 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1282 TL/15 SECURITY: prevent double expansion in math comparison functions
1283 (can expand unsanitized data). Not remotely exploitable.
1290 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1292 PP/02 Make -n do something, by making it not do something.
1293 When combined with -bP, the name of an option is not output.
1295 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1298 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1299 $sender_host_name and config options to manage this, and basic check
1302 PP/05 DSCP support for outbound connections and control modifier for inbound.
1304 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1305 (Only plugin which currently uses this is kerberos4, which nobody should
1306 be using, but we should make it available and other future plugins might
1307 conceivably use it, even though it would break NAT; stuff *should* be
1308 using channel bindings instead).
1310 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1311 name; added for Sendmail compatibility; requires admin caller.
1312 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1313 just ignore it); requires trusted caller.
1314 Also parse but ignore: -Ac -Am -X<logfile>
1317 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1319 TL/02 Add +smtp_confirmation as a default logging option.
1321 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1322 Patch by Magnus Holmgren from 2007-02-20.
1324 TL/04 Bugzilla 1281 - Spec typo.
1325 Bugzilla 1283 - Spec typo.
1326 Bugzilla 1290 - Spec grammar fixes.
1328 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1330 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1332 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1333 mailing list by by Dmitry Isaikin.
1335 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1337 JH/02 Support "G" suffix to numbers in ${if comparisons.
1339 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1341 NM/01 Bugzilla 1197 - Spec typo
1342 Bugzilla 1196 - Spec examples corrections
1344 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1346 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1347 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1350 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1351 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1353 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1354 "acl {{name}{arg}...}", and optional args on acl condition
1357 JH/05 Permit multiple router/transport headers_add/remove lines.
1359 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1361 JH/07 Avoid using a waiting database for a single-message-only transport.
1362 Performance patch from Paul Fisher. Bugzilla 1262.
1364 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1367 JH/09 Add $headers_added variable, with content from use of ACL modifier
1368 add_header (but not yet added to the message). Bugzilla 199.
1370 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1371 Pulled from Bugzilla 817 by Wolfgang Breyha.
1373 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1375 (nb: this is the same fix as in Exim 4.80.1)
1377 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1380 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1383 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1385 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1386 advertise SMTP AUTH mechanism to us, instead of a generic
1387 protocol violation error. Also, make Exim more robust to bad
1388 data from the Dovecot auth socket.
1390 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1392 When a queue runner is handling a message, Exim first routes the
1393 recipient addresses, during which it prunes them based on the retry
1394 hints database. After that it attempts to deliver the message to
1395 any remaining recipients. It then updates the hints database using
1398 So if a recipient address works intermittently, it can get repeatedly
1399 deferred at routing time. The retry hints record remains fresh so the
1400 address never reaches the final cutoff time.
1402 This is a fairly common occurrence when a user is bumping up against
1403 their storage quota. Exim had some logic in its local delivery code
1404 to deal with this. However it did not apply to per-recipient defers
1405 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1407 This change adds a proper retry rule check during routing so that the
1408 final cutoff time is checked against the message's age. We only do
1409 this check if there is an address retry record and there is not a
1410 domain retry record; this implies that previous attempts to handle
1411 the address had the retry_use_local_parts option turned on. We use
1412 this as an approximation for the destination being like a local
1413 delivery, as in LMTP.
1415 I suspect this new check makes the old local delivery cutoff check
1416 redundant, but I have not verified this so I left the code in place.
1418 TF/02 Correct gecos expansion when From: is a prefix of the username.
1420 Test 0254 submits a message to Exim with the header
1424 When I ran the test suite under the user fanf2, Exim expanded
1425 the header to contain my full name, whereas it should have added
1426 a Resent-Sender: header. It erroneously treats any prefix of the
1427 username as equal to the username.
1429 This change corrects that bug.
1431 GF/01 DCC debug and logging tidyup
1432 Error conditions log to paniclog rather than rejectlog.
1433 Debug lines prefixed by "DCC: " to remove any ambiguity.
1435 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1437 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1438 Bug spotted by Jeremy Harris; was flawed since initial commit.
1439 Would have resulted in OCSP responses post-SNI triggering an Exim
1440 NULL dereference and crash.
1442 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1444 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1445 Bug detection, analysis and fix by Samuel Thibault.
1446 Bugzilla 1331, Debian bug #698092.
1448 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1450 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1451 Server implementation by Todd Lyons, client by JH.
1452 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1453 config variable "prdr_enable" controls whether the server
1454 advertises the facility. If the client requests PRDR a new
1455 acl_data_smtp_prdr ACL is called once for each recipient, after
1456 the body content is received and before the acl_smtp_data ACL.
1457 The client is controlled by both of: a hosts_try_prdr option
1458 on the smtp transport, and the server advertisement.
1459 Default client logging of deliveries and rejections involving
1460 PRDR are flagged with the string "PRDR".
1462 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1463 fclose(). Diagnosis by Todd Lyons.
1465 PP/17 Update configure.default to handle IPv6 localhost better.
1466 Patch by Alain Williams (plus minor tweaks).
1469 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1470 This is now consistent with GnuTLS, and is now documented: the
1471 previous undocumented portable approach to treating the option as
1472 unset was to force an expansion failure. That still works, and
1473 an empty string is now equivalent.
1475 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1476 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1477 not performing validation itself.
1479 PP/20 Added force_command boolean option to pipe transport.
1480 Patch from Nick Koston, of cPanel Inc.
1482 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1485 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1487 PP/21 Fix eximon continuous updating with timestamped log-files.
1488 Broken in a format-string cleanup in 4.80, missed when I repaired the
1489 other false fix of the same issue.
1490 Report and fix from Heiko Schlichting.
1493 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1494 Report from Prashanth Katuri.
1496 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1497 It's SecureTransport, so affects any MacOS clients which use the
1498 system-integrated TLS libraries, including email clients.
1500 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1501 using a MIME ACL for non-SMTP local injection.
1502 Report and assistance in diagnosis by Warren Baker.
1504 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1506 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1508 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1509 last id that failed so it may be referenced in subsequent ACL's.
1511 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1514 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1515 ldap library initialization, allowing self-signed CA's to be
1516 used. Also properly sets require_cert option later in code by
1517 using NULL (global ldap config) instead of ldap handle (per
1518 session). Bug diagnosis and testing by alxgomz.
1520 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1521 the src/util/ subdirectory.
1523 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1524 renamed to Transport Post Delivery Action by Jeremy Harris, as
1527 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1528 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1529 redis_servers = needs to be configured which will be used by the redis
1530 lookup. Patch from Warren Baker, of The Packet Hub.
1532 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1534 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1535 hostname or reverse DNS when processing a host list. Used suggestions
1536 from multiple comments on this bug.
1538 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1540 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1541 Missed a few lines, added it to make the runtest require no keyboard
1544 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1545 contains upper case chars. Make router use caseful_local_part.
1547 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1548 support when GnuTLS has been built with p11-kit.
1554 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1556 This, or similar/improved, will also be change PP/11 of 4.82.
1562 PP/01 Handle short writes when writing local log-files.
1563 In practice, only affects FreeBSD (8 onwards).
1564 Bugzilla 1053, with thanks to Dmitry Isaikin.
1566 NM/01 Bugzilla 949 - Documentation tweak
1568 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1571 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1573 PP/02 Implemented gsasl authenticator.
1575 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1577 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1578 `pkg-config foo` for cflags/libs.
1580 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1581 with rest of GSASL and with heimdal_gssapi.
1583 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1584 `pkg-config foo` for cflags/libs for the TLS implementation.
1586 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1587 properties get this fed in as external SSF. A number of robustness
1588 and debugging improvements to the cyrus_sasl authenticator.
1590 PP/08 cyrus_sasl server now expands the server_realm option.
1592 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1593 Patch by Jeremy Harris.
1595 PP/10 Added dbmjz lookup type.
1597 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1599 PP/12 MAIL args handles TAB as well as SP, for better interop with
1600 non-compliant senders.
1601 Analysis and variant patch by Todd Lyons.
1603 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1604 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1605 Patch from Dirk Mueller <dmueller@suse.com>
1607 PP/13 tls_peerdn now print-escaped for spool files.
1608 Observed some $tls_peerdn in wild which contained \n, which resulted
1609 in spool file corruption.
1611 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1612 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1613 or write after TLS renegotiation, which otherwise led to messages
1616 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1617 as a tracking header (ie: a signed header comes before the signature).
1618 Patch from Wolfgang Breyha.
1620 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1621 comma-sep list; embedded commas doubled.
1623 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1625 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1627 Report and patch from Dmitry Banschikov.
1629 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1630 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1631 failures. We appear to now support TLS1.1+ with Exim.
1633 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1634 lets Exim select keys and certificates based upon TLS SNI from client.
1635 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1636 before an outbound SMTP session. New log_selector, +tls_sni.
1638 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1639 NULL dereference. Report and patch from Alun Jones.
1641 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1642 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1643 Not seeing resolver debug output on NetBSD, but suspect this is a
1644 resolver implementation change.
1646 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1647 Left warnings. Added "eximon gdb" invocation mode.
1649 PP/21 Defaulting "accept_8bitmime" to true, not false.
1651 PP/22 Added -bw for inetd wait mode support.
1653 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1654 locate the relevant includes and libraries. Made this the default.
1656 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1657 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1659 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1660 This may cause build issues on older platforms.
1662 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1663 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1664 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1665 Added SNI support via GnuTLS too.
1666 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1668 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1670 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1671 Applied second patch from Janne, implementing suggestion to default
1672 multiple-strings-in-record handling to match SPF spec.
1674 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1676 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1677 read-only, out of scope).
1678 Patch from Wolfgang Breyha, report from Stuart Northfield.
1680 PP/29 Fix three issues highlighted by clang analyser static analysis.
1681 Only crash-plausible issue would require the Cambridge-specific
1682 iplookup router and a misconfiguration.
1683 Report from Marcin Mirosław.
1685 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1687 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1688 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1689 As part of this, removing so much warning spew let me fix some minor
1690 real issues in debug logging.
1692 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1693 assignment on my part. Fixed.
1695 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1696 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1697 Janne Snabb (who went above and beyond: thank you).
1699 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1700 string otherwise requires a connection and a bunch more work and it's
1701 relatively easy to get wrong. Should also expose TLS library linkage
1704 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1705 64-bit ${eval} (JH/03).
1707 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1708 GNU libc to support some of the 64-bit stuff, should not lead to
1709 conflicts. Defined before os.h is pulled in, so if a given platform
1710 needs to override this, it can.
1712 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1713 protection layer was required, which is not implemented.
1714 Bugzilla 1254, patch from Wolfgang Breyha.
1716 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1717 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1718 tls_dhparam take prime identifiers. Also unbreak combination of
1719 OpenSSL+DH_params+TLSSNI.
1721 PP/39 Disable SSLv2 by default in OpenSSL support.
1727 PP/01 Solaris build fix for Oracle's LDAP libraries.
1728 Bugzilla 1109, patch from Stephen Usher.
1730 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1732 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1735 TF/02 Fix a couple more cases where we did not log the error message
1736 when unlink() failed. See also change 4.74-TF/03.
1738 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1739 lock up or crash if it happened to be inside a call to libc when it
1740 got a SIGUSR1 from exiwhat.
1742 The SIGUSR1 handler appends the current process status to the process
1743 log which is later printed by exiwhat. It used to use the general
1744 purpose logging code to do this, but several functions it calls are
1745 not safe for signals.
1747 The new output code in the SIGUSR1 handler is specific to the process
1748 log, and simple enough that it's easy to inspect for signal safety.
1749 Removing some special cases also simplifies the general logging code.
1750 Removing the spurious timestamps from the process log simplifies
1753 TF/04 Improved ratelimit ACL condition.
1755 The /noupdate option has been deprecated in favour of /readonly which
1756 has clearer semantics. The /leaky, /strict, and /readonly update modes
1757 are mutually exclusive. The update mode is no longer included in the
1758 database key; it just determines when the database is updated. (This
1759 means that when you upgrade Exim will forget old rate measurements.)
1761 Exim now checks that the per_* options are used with an update mode that
1762 makes sense for the current ACL. For example, when Exim is processing a
1763 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1764 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1765 must specify per_mail/readonly. If you omit the update mode it defaults to
1766 /leaky where that makes sense (as before) or /readonly where required.
1768 The /noupdate option is now undocumented but still supported for
1769 backwards compatibility. It is equivalent to /readonly except that in
1770 ACLs where /readonly is required you may specify /leaky/noupdate or
1771 /strict/noupdate which are treated the same as /readonly.
1773 A useful new feature is the /count= option. This is a generalization
1774 of the per_byte option, so that you can measure the throughput of other
1775 aggregate values. For example, the per_byte option is now equivalent
1776 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1778 The per_rcpt option has been generalized using the /count= mechanism
1779 (though it's more complicated than the per_byte equivalence). When it is
1780 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1781 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1782 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1783 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1784 Note that using per_rcpt with a non-readonly update mode in more than
1785 one ACL will cause the recipients to be double-counted. (The per_mail
1786 and per_byte options don't have this problem.)
1788 The handling of very low rates has changed slightly. If the computed rate
1789 is less than the event's count (usually one) then this event is the first
1790 after a long gap. In this case the rate is set to the same as this event's
1791 count, so that the first message of a spam run is counted properly.
1793 The major new feature is a mechanism for counting the rate of unique
1794 events. The new per_addr option counts the number of different
1795 recipients that someone has sent messages to in the last time period. It
1796 behaves like per_rcpt if all the recipient addresses are different, but
1797 duplicate recipient addresses do not increase the measured rate. Like
1798 the /count= option this is a general mechanism, so the per_addr option
1799 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1800 example, measure the rate that a client uses different sender addresses
1801 with the options per_mail/unique=$sender_address. There are further
1802 details in the main documentation.
1804 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1806 TF/06 Removed a few PCRE remnants.
1808 TF/07 Automatically extract Exim's version number from tags in the git
1809 repository when doing development or release builds.
1811 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1812 Bugzilla 879. Patch from Paul Fisher.
1814 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1815 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1818 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1820 PP/05 Variable $av_failed, true if the AV scanner deferred.
1821 Bugzilla 1078. Patch from John Horne.
1823 PP/06 Stop make process more reliably on build failure.
1824 Bugzilla 1087. Patch from Heiko Schlittermann.
1826 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1827 Bugzilla 1089. Patch from Heiko Schlittermann.
1829 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1830 Bugzilla 1131. Patch from Holger Weiß.
1832 PP/09 Handle IPv6 addresses with SPF.
1833 Bugzilla 860. Patch from Wolfgang Breyha.
1835 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1837 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1840 PP/11 match_* no longer expand right-hand-side by default.
1841 New compile-time build option, EXPAND_LISTMATCH_RHS.
1842 New expansion conditions, "inlist", "inlisti".
1844 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1846 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1848 PP/14 fix log_write() format string regression from TF/03.
1849 Bugzilla 1152. Patch from Dmitry Isaikin.
1855 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1857 PP/02 Harmonised TLS library version reporting; only show if debugging.
1858 Layout now matches that introduced for other libraries in 4.74 PP/03.
1860 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1862 PP/04 New "dns_use_edns0" global option.
1864 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1867 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1868 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1870 TK/01 Updated PolarSSL code to 0.14.2.
1871 Bugzilla 1097. Patch from Andreas Metzler.
1873 PP/07 Catch divide-by-zero in ${eval:...}.
1874 Fixes bugzilla 1102.
1876 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1879 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1880 format-string attack -- SECURITY: remote arbitrary code execution.
1882 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1883 time unintentionally subject to list matching rules, letting the header
1884 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1885 arbitrary string expansion). This allowed for information disclosure.
1887 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1888 INT_MIN/-1 -- value coerced to INT_MAX.
1894 NM/01 Workaround for PCRE version dependency in version reporting
1897 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1898 This fixes portability to compilers other than gcc, notably
1899 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1901 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1902 makefiles for portability to HP-UX and POSIX correctness.
1904 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1905 Also via indented variable definition in the Makefile.
1906 (Debugging by Oliver Heesakkers).
1908 PP/02 Restore caching of spamd results with expanded spamd_address.
1909 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1911 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1912 Improves build reliability. Fix from: Frank Elsner
1914 NM/02 Fix wide character breakage in the rfc2047 coding
1915 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1917 NM/03 Allow underscore in dnslist lookups
1918 Fixes bug 1026. Patch from Graeme Fowler
1920 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1921 Code patches from Adam Ciarcinski of NetBSD.
1923 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1926 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1927 is logged, to avoid truncation. Patch from John Horne.
1929 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1930 Patch from Jakob Hirsch.
1932 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1933 SQL string expansion failure details.
1934 Patch from Andrey Oktyabrski.
1936 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1937 Patch from Simon Arlott.
1939 PP/09 New lookups functionality failed to compile on old gcc which rejects
1940 extern declarations in function scope.
1941 Patch from Oliver Fleischmann
1943 PP/10 Use sig_atomic_t for flags set from signal handlers.
1944 Check getgroups() return and improve debugging.
1945 Fixed developed for diagnosis in bug 927 (which turned out to be
1948 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1949 Patch from Mark Zealey.
1951 PP/12 Bugzilla 1056: Improved spamd server selection.
1952 Patch from Mark Zealey.
1954 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1955 Based on patch from Heiko Schlittermann.
1957 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1958 Patch from Uwe Doering, sign-off by Michael Haardt.
1960 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1961 variable declaration deep within a block. Bug and patch from
1964 PP/15 lookups-Makefile IRIX compatibility coercion.
1966 PP/16 Make DISABLE_DKIM build knob functional.
1968 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1969 Patch by Simon Arlott
1971 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1972 variable argument macros. Our copy now differs from upstream.
1978 TF/01 Failure to get a lock on a hints database can have serious
1979 consequences so log it to the panic log.
1981 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1982 controlled using the smtp_confirmation log selector.
1984 TF/03 Include the error message when we fail to unlink a spool file.
1986 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1987 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1988 for maintaining out-of-tree patches for some time.
1990 PP/01 Bugzilla 139: Documentation and portability issues.
1991 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1992 Handle per-OS dynamic-module compilation flags.
1994 PP/02 Let /dev/null have normal permissions.
1995 The 4.73 fixes were a little too stringent and complained about the
1996 permissions on /dev/null. Exempt it from some checks.
1997 Reported by Andreas M. Kirchwitz.
1999 PP/03 Report version information for many libraries, including
2000 Exim version information for dynamically loaded libraries. Created
2001 version.h, now support a version extension string for distributors
2002 who patch heavily. Dynamic module ABI change.
2004 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2005 privilege escalation vulnerability whereby the Exim run-time user
2006 can cause root to append content of the attacker's choosing to
2009 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2012 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2013 If dropping privileges for untrusted macros, we disabled normal logging
2014 on the basis that it would fail; for the Exim run-time user, this is not
2015 the case, and it resulted in successful deliveries going unlogged.
2016 Fixed. Reported by Andreas Metzler.
2022 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2023 only prepend for the Resent-* case. Fixes regression introduced in
2024 Exim 4.70 by NM/22 for Bugzilla 607.
2026 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2027 increasing numbers of administrators be bitten by this.
2029 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2031 PP/03 Bugzilla 994: added openssl_options main configuration option.
2033 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2035 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2037 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2039 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2040 without a peer certificate, leading to a segfault because of an
2041 assumption that peers always have certificates. Be a little more
2042 paranoid. Problem reported by Martin Tscholak.
2044 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2045 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2046 NB: ClamAV planning to remove STREAM in "middle of 2010".
2047 CL also introduces -bmalware, various -d+acl logging additions and
2048 more caution in buffer sizes.
2050 PP/09 Implemented reverse_ip expansion operator.
2052 PP/10 Bugzilla 937: provide a "debug" ACL control.
2054 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2056 PP/12 Bugzilla 973: Implement --version.
2058 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2060 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2062 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2064 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2065 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2066 ignore trailing whitespace.
2068 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2070 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2073 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2074 Notification from Dr Andrew Aitchison.
2076 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2077 ExtendedDetectionInfo response format.
2078 Notification from John Horne.
2080 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2083 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2084 XSL and documented dependency on system catalogs, with examples of how
2087 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2090 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2091 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2092 configuration file which is writeable by the Exim user or group.
2094 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2095 of configuration files to cover files specified with the -C option if
2096 they are going to be used with root privileges, not just the default
2099 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2100 option (effectively making it always true).
2102 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2103 files to be used while preserving root privileges.
2105 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2106 that rogue child processes cannot use them.
2108 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2109 run-time user, instead of root.
2111 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2112 Exim run-time user without dropping privileges.
2114 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2115 result string, instead of calling string_vformat() twice with the same
2118 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2119 for other users. Others should always drop root privileges if they use
2120 -C on the command line, even for a whitelisted configure file.
2122 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2124 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2130 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2131 $data_path, and $header_path variables; fixed documentation bugs and
2134 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2135 exipick to access non-standard spools, including the "frozen" queue
2138 NM/01 Bugzilla 965: Support mysql stored procedures.
2139 Patch from Alain Williams
2141 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2143 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2144 Patch from Andreas Metzler
2146 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2147 Patch from Kirill Miazine
2149 NM/05 Bugzilla 671: Added umask to procmail example.
2151 JJ/03 installed exipick 20100323.0, fixing doc bug
2153 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2154 directory. Notification and patch from Dan Rosenberg.
2156 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2158 TK/02 Improve log output when DKIM signing operation fails.
2160 MH/01 Treat the transport option dkim_domain as a colon separated
2161 list, not as a single string, and sign the message with each element,
2162 omitting multiple occurences of the same signer.
2164 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2165 Bugzilla 985, 986. Patch by Simon Arlott
2167 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2168 Patch by Simon Arlott
2170 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2171 MBX locking. Notification from Dan Rosenberg.
2177 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2179 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2181 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2183 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2185 NM/04 Bugzilla 915: Flag broken perl installation during build.
2191 TK/01 Added patch by Johannes Berg that expands the main option
2192 "spamd_address" if it starts with a dollar sign.
2194 TK/02 Write list of recipients to X-Envelope-Sender header when building
2195 the mbox-format spool file for content scanning (suggested by Jakob
2198 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2199 (http://www.dcc-servers.net/) support via dccifd. Activated by
2200 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2202 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2203 by Mark Daniel Reidel <mr@df.eu>.
2205 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2206 When building exim an external PCRE library is now needed -
2207 PCRE is a system library on the majority of modern systems.
2208 See entry on PCRE_LIBS in EDITME file.
2210 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2211 conversation. Added nologin parameter to request.
2212 Patch contributed by Kirill Miazine.
2214 TF/01 Do not log submission mode rewrites if they do not change the address.
2216 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2218 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2219 log files in place. Contributed by Roberto Lima.
2221 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2223 TF/03 Bugzilla 615: When checking the local_parts router precondition
2224 after a local_part_suffix or local_part_prefix option, Exim now
2225 does not use the address's named list lookup cache, since this
2226 contains cached lookups for the whole local part.
2228 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2229 Robert Millan. Documentation is in experimental-spec.txt.
2231 TF/04 Bugzilla 668: Fix parallel build (make -j).
2233 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2235 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2236 Patch provided by Jan Srzednicki.
2238 TF/05 Leading white space used to be stripped from $spam_report which
2239 wrecked the formatting. Now it is preserved.
2241 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2242 that they are available at delivery time.
2244 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2246 TF/08 TLS error reporting now respects the incoming_interface and
2247 incoming_port log selectors.
2249 TF/09 Produce a more useful error message if an SMTP transport's hosts
2250 setting expands to an empty string.
2252 NM/06 Bugzilla 744: EXPN did not work under TLS.
2253 Patch provided by Phil Pennock.
2255 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2256 Patch provided by Richard Godbee.
2258 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2259 acl_smtp_notquit, added index entry.
2261 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2262 Patch provided by Eugene Bujak.
2264 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2265 accept(). Patch provided by Maxim Dounin.
2267 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2268 Patch provided by Phil Pennock.
2270 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2272 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2273 Patch provided by Brad "anomie" Jorsch.
2275 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2276 Patch provided by Dean Brooks.
2278 TK/05 Add native DKIM support (does not depend on external libraries).
2280 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2281 Patch provided by Graeme Fowler.
2283 NM/16 Bugzilla 851: Documentation example syntax fix.
2285 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2287 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2290 NM/19 Bugzilla 745: TLS version reporting.
2291 Patch provided by Phil Pennock.
2293 NM/20 Bugzilla 167: bool: condition support.
2294 Patch provided by Phil Pennock.
2296 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2297 clients. Patch provided by Phil Pennock.
2299 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2300 Patch provided by Brad "anomie" Jorsch.
2302 NM/23 Bugzilla 687: Fix misparses in eximstats.
2303 Patch provided by Heiko Schlittermann.
2305 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2306 Patch provided by Heiko Schlittermann.
2308 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2309 plus update to original patch.
2311 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2313 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2314 Patch provided by David Brownlee.
2316 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2318 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2320 NM/30 Bugzilla 888: TLS documentation bugfixes.
2322 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2324 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2325 Unlike the original bugzilla I have changed all shell scripts in src tree.
2327 NM/33 Bugzilla 898: Transport filter timeout fix.
2328 Patch by Todd Rinaldo.
2330 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2331 Patch by Serge Demonchaux.
2333 NM/35 Bugzilla 39: Base64 decode bug fixes.
2334 Patch by Jakob Hirsch.
2336 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2338 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2340 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2342 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2348 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2349 ALT-N's libdkim that I have put here:
2350 http://duncanthrax.net/exim-experimental/
2352 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2353 were called 'true' and it seems that C99 defines that as a reserved
2354 keyword to be used with 'bool' variable types. That means you could
2355 not include C99-style headers which use bools without triggering
2356 build errors in sieve.c.
2358 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2359 as mailq or other aliases. Changed the --help handling significantly
2360 to do whats expected. exim_usage() emits usage/help information.
2362 SC/01 Added the -bylocaldomain option to eximstats.
2364 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2366 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2368 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2374 PH/01 Another patch from the Sieve maintainer.
2376 PH/02 When an IPv6 address is converted to a string for single-key lookup
2377 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2378 dots are used instead of colons so that keys in lsearch files need not
2379 contain colons. This was done some time before quoting was made available
2380 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2381 (notated using the quote facility) so as to distinguish them from IPv4
2382 keys. This meant that lookups for IP addresses in host lists did not work
2383 for iplsearch lookups.
2385 This has been fixed by arranging for IPv6 addresses to be expressed with
2386 colons if the lookup type is iplsearch. This is not incompatible, because
2387 previously such lookups could never work.
2389 The situation is now rather anomalous, since one *can* have colons in
2390 ordinary lsearch keys. However, making the change in all cases is
2391 incompatible and would probably break a number of configurations.
2393 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2396 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2397 conversion specification without a maximum field width, thereby enabling
2398 a rogue spamd server to cause a buffer overflow. While nobody in their
2399 right mind would setup Exim to query an untrusted spamd server, an
2400 attacker that gains access to a server running spamd could potentially
2401 exploit this vulnerability to run arbitrary code as the Exim user.
2403 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2404 $primary_hostname instead of what libspf2 thinks the hosts name is.
2406 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2407 a directory entry by the name of the lookup key. Previously, if a
2408 symlink pointed to a non-existing file or a file in a directory that
2409 Exim lacked permissions to read, a lookup for a key matching that
2410 symlink would fail. Now it is enough that a matching directory entry
2411 exists, symlink or not. (Bugzilla 503.)
2413 PH/03 The body_linecount and body_zerocount variables are now exported in the
2416 PH/04 Added the $dnslist_matched variable.
2418 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2419 This means they are set thereafter only if the connection becomes
2422 PH/06 Added the client_condition to authenticators so that some can be skipped
2423 by clients under certain conditions.
2425 PH/07 The error message for a badly-placed control=no_multiline_responses left
2426 "_responses" off the end of the name.
2428 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2430 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2431 (without spaces) instead of just copying the configuration text.
2433 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2435 PH/11 Added $max_received_linelength.
2437 PH/12 Added +ignore_defer and +include_defer to host lists.
2439 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2440 way in which PCRE > 7.0 is built.
2442 PH/14 Implemented queue_only_load_latch.
2444 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2445 MAIL command. The effect was to mangle the value on 64-bit systems.
2447 PH/16 Another patch from the Sieve maintainer.
2449 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2451 PH/18 If a system quota error occurred while trying to create the file for
2452 a maildir delivery, the message "Mailbox is full" was not appended to the
2453 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2454 only to a quota excession during the actual writing of the file.
2456 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2457 characters?) which causes problems in log lines. The DN values are now
2458 passed through string_printing() before being added to log lines.
2460 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2461 and InterBase are left for another time.)
2463 PH/21 Added message_body_newlines option.
2465 PH/22 Guard against possible overflow in moan_check_errorcopy().
2467 PH/23 POSIX allows open() to be a macro; guard against that.
2469 PH/24 If the recipient of an error message contained an @ in the local part
2470 (suitably quoted, of course), incorrect values were put in $domain and
2471 $local_part during the evaluation of errors_copy.
2477 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2478 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2481 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2482 issue a MAIL command.
2484 PH/02 In an ACL statement such as
2486 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2488 if a client was not listed at all, or was listed with a value other than
2489 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2490 the condition was not true (as it should be), so access was not denied.
2491 The bug was that the ! inversion was incorrectly passed on to the second
2492 item. This has been fixed.
2494 PH/03 Added additional dnslists conditions == and =& which are different from
2495 = and & when the dns lookup returns more than one IP address.
2497 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2498 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2500 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2501 FSYNC, which compiles an option called disable_fsync that allows for
2502 bypassing fsync(). The documentation is heavily laced with warnings.
2504 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2506 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2507 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2508 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2509 including adding "make clean"; (3) Added -fPIC when compiling the test
2510 dynamically loaded module, to get rid of a warning.
2512 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2513 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2514 = 0s. The bug is otherwise harmless.
2516 PH/07 There was a bug in the dovecot authenticator such that the value of
2517 $auth1 could be overwritten, and so not correctly preserved, after a
2518 successful authentication. This usually meant that the value preserved by
2519 the server_setid option was incorrect.
2521 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2523 PH/09 Installed PCRE release 7.0.
2525 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2526 run for batched SMTP input. It is now run at the start of every message
2527 in the batch. While fixing this I discovered that the process information
2528 (output by running exiwhat) was not always getting set for -bs and -bS
2529 input. This is fixed, and it now also says "batched" for BSMTP.
2531 PH/11 Added control=no_pipelining.
2533 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2534 patch, slightly modified), and move the expansion of helo_data till after
2535 the connection is made in the smtp transport (so it can use these
2538 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2540 PH/14 Added log_selector = +pid.
2542 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2544 PH/16 Add ${if forany and ${if forall.
2546 PH/17 Added dsn_from option to vary the From: line in DSNs.
2548 PH/18 Flush SMTP output before performing a callout, unless control =
2549 no_callout_flush is set.
2551 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2552 was true (the default) a successful delivery failed to delete the retry
2553 item, thus causing premature timeout of the address. The bug is now
2556 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2558 PH/21 Long custom messages for fakedefer and fakereject are now split up
2559 into multiline responses in the same way that messages for "deny" and
2560 other ACL rejections are.
2562 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2563 with slight modification.
2565 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2566 draft, changing the syntax and factoring some duplicate code".
2568 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2569 for deliveries of the second and subsequent messages over the same SMTP
2572 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2573 ${reduce, with only minor "tidies".
2575 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2577 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2578 expansion side effects.
2580 PH/27 When a message times out after an over-quota error from an Exim-imposed
2581 quota, the bounce message says "mailbox is full". This message was not
2582 being given when it was a system quota that was exceeded. It now should
2585 MH/03 Made $recipients available in local_scan(). local_scan() already has
2586 better access to the recipient list through recipients_list[], but
2587 $recipients can be useful in postmaster-provided expansion strings.
2589 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2590 in the case of a MAIL command with additional options following the
2591 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2592 were accidentally chopped off.
2594 PH/29 SMTP synchronization checks are implemented when a command is read -
2595 there is a check that no more input is waiting when there shouldn't be
2596 any. However, for some commands, a delay in an ACL can mean that it is
2597 some time before the response is written. In this time, more input might
2598 arrive, invalidly. So now there are extra checks after an ACL has run for
2599 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2600 pipelining has not been advertised.
2602 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2604 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2605 returned in the SMTP response when smtp_return_error_details was false.
2606 This has been fixed.
2608 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2609 instead of the C I/O that was originally supplied, because problems were
2610 reported on Solaris.
2612 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2613 Exim which did not show up earlier: it was assuming that a call to
2614 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2615 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2616 was a macro that became an assignment, so it seemed to work. This has
2617 changed to a proper function call with a void return, hence the compile
2618 error. Exim's code has been fixed.
2620 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2623 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2625 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2627 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2628 because it turns out to be too big or there is a timeout) there is no
2629 "Completed" line in the log. When some messages of this type were
2630 selected by exigrep, they were listed as "not completed". Others were
2631 picked up by some special patterns. I have improved the selection
2632 criteria to be more general.
2634 PH/38 The host_find_failed option in the manualroute router can now be set
2635 to "ignore", to completely ignore a host whose IP address cannot be
2636 found. If all hosts are ignored, the behaviour is controlled by the new
2637 host_all_ignored option.
2639 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2640 homing or because of multiple MX records with /mx) generated more than
2641 one IP address, and the following item turned out to be the local host,
2642 all the secondary addresses of the first item were incorrectly removed
2643 from the list, along with the local host and any following hosts (which
2644 is what is supposed to happen).
2646 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2647 whoever called Exim into the -H file. In the case of the daemon it was
2648 behaving confusingly. When first started, it used values for whoever
2649 started the daemon, but after a SIGHUP it used the Exim user (because it
2650 calls itself on a restart). I have changed the code so that it now always
2653 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2654 message are rejected with the same error (e.g. no authentication or bad
2655 sender address), and a DATA command is nevertheless sent (as can happen
2656 with PIPELINING or a stupid MUA), the error message that was given to the
2657 RCPT commands is included in the rejection of the DATA command. This is
2658 intended to be helpful for MUAs that show only the final error to their
2661 PH/42 Another patch from the Sieve maintainer.
2663 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2664 Eximstats - Fixed some broken HTML links and added missing column headers
2666 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2667 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2669 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2671 PH/43 Yet another patch from the Sieve maintainer.
2673 PH/44 I found a way to check for a TCP/IP connection going away before sending
2674 the response to the final '.' that terminates a message, but only in the
2675 case where the client has not sent further data following the '.'
2676 (unfortunately, this is allowed). However, in many cases there won't be
2677 any further data because there won't be any more messages to send. A call
2678 to select() can be used: if it shows that the input is "ready", there is
2679 either input waiting, or the socket has been closed. An attempt to read
2680 the next input character can distinguish the two cases. Previously, Exim
2681 would have sent an OK response which the client would never have see.
2682 This could lead to message repetition. This fix should cure that, at
2683 least in a lot of common cases.
2685 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2686 advertised in response to EHLO.
2692 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2693 fixed by 4.65/MH/01 (is this a record?) are fixed:
2695 (i) An empty string was always treated as zero by the numeric comparison
2696 operators. This behaviour has been restored.
2698 (ii) It is documented that the numeric comparison operators always treat
2699 their arguments as decimal numbers. This was broken in that numbers
2700 starting with 0 were being interpreted as octal.
2702 While fixing these problems I realized that there was another issue that
2703 hadn't been noticed. Values of message_size_limit (both the global option
2704 and the transport option) were treated as octal if they started with 0.
2705 The documentation was vague. These values are now always treated as
2706 decimal, and I will make that clear in the documentation.
2712 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2713 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2716 MH/01 Don't check that the operands of numeric comparison operators are
2717 integers when their expansion is in "skipping" mode (fixes bug
2718 introduced by 4.64-PH/07).
2720 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2721 child addresses, Exim now panics and dies. Previously, because the count
2722 is held in a short int, deliveries were likely to be lost. As such a
2723 large number of recipients for a single message is ridiculous
2724 (performance will be very, very poor), I have chosen to impose a limit
2725 rather than extend the field.
2731 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2732 leftover -K file (the existence of which was triggered by #402).
2733 While we were at it, introduced process PID as part of the -K
2734 filename. This should rule out race conditions when creating
2737 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2738 processing considerably. Previous code took too long for large mails,
2739 triggering a timeout which in turn triggers #401.
2741 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2742 in the DK code in transports.c. sendfile() is not really portable,
2743 hence the _LINUX specificness.
2745 TF/01 In the add_headers option to the mail command in an Exim filter,
2746 there was a bug that Exim would claim a syntax error in any
2747 header after the first one which had an odd number of characters
2750 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2751 callout verification, Exim cached a "reject" for the entire domain. This
2752 is correct for most verifications, but it is not correct for a recipient
2753 verification with use_sender or use_postmaster set, because in that case
2754 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2755 case of MAIL FROM:<> rejection from other early rejections (e.g.
2756 rejection of HELO). When verifying a recipient using a non-null MAIL
2757 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2758 Whatever the result of the callout, the value of the domain cache is
2759 left unchanged (for any other kind of callout, getting as far as trying
2760 RCPT means that the domain itself is ok).
2762 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2765 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2766 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2767 session, the daemon ignores ECONNECT errors and logs others; it now
2768 ignores EPIPE as well.
2770 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2771 (quoted-printable decoding).
2773 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2774 later the small subsequent patch to fix an introduced bug.
2776 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2778 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2780 PH/08 An error is now given if message_size_limit is specified negative.
2782 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2783 to be given (somewhat) arbitrary names.
2785 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2788 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2789 miscellaneous code fixes
2791 PH/10 Added the log_reject_target ACL modifier to specify where to log
2794 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2795 hostname. This is wrong, because it relates to the incoming message (and
2796 probably the interface on which it is arriving) and not to the outgoing
2797 callout (which could be using a different interface). This has been
2798 changed to use the value of the helo_data option from the smtp transport
2799 instead - this is what is used when a message is actually being sent. If
2800 there is no remote transport (possible with a router that sets up host
2801 addresses), $smtp_active_hostname is used.
2803 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2804 tweaks were necessary in order to get it to work (see also 21 below):
2805 (a) The code assumed that strncpy() returns a negative number on buffer
2806 overflow, which isn't the case. Replaced with Exim's string_format()
2808 (b) There were several signed/unsigned issues. I just did the minimum
2809 hacking in of casts. There is scope for a larger refactoring.
2810 (c) The code used strcasecmp() which is not a standard C function.
2811 Replaced with Exim's strcmpic() function.
2812 (d) The code set only $1; it now sets $auth1 as well.
2813 (e) A simple test gave the error "authentication client didn't specify
2814 service in request". It would seem that Dovecot has changed its
2815 interface. Fortunately there's a specification; I followed it and
2816 changed what the client sends and it appears to be working now.
2818 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2821 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2822 address A is aliased to B and C, where B exists and C does not. Without
2823 -v the output is "A verified" because verification stops after a
2824 successful redirection if more than one address is generated. However,
2825 with -v the child addresses are also verified. Exim was outputting "A
2826 failed to verify" and then showing the successful verification for C,
2827 with its parentage. It now outputs "B failed to verify", showing B's
2828 parentage before showing the successful verification of C.
2830 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2831 look up a TXT record in a specific list after matching in a combined
2834 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2835 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2836 they consult the DNS. I had assumed they would set it the way they
2837 wanted; and indeed my experiments on Linux seem to show that in some
2838 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2839 To be on the safe side, however, I have now made the interface to
2840 host_find_byname() similar to host_find_bydns(), with an argument
2841 containing the DNS resolver options. The host_find_byname() function now
2842 sets these options at its start, just as host_find_bydns() does. The smtp
2843 transport options dns_qualify_single and dns_search_parents are passed to
2844 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2845 of host_find_byname() use the default settings of RES_DEFNAMES
2846 (qualify_single) but not RES_DNSRCH (search_parents).
2848 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2849 spool_read_header() do less string testing, by means of a preliminary
2850 switch on the second character of optional "-foo" lines. (This is
2851 overdue, caused by the large number of possibilities that now exist.
2852 Originally there were few.) While I was there, I also converted the
2853 str(n)cmp tests so they don't re-test the leading "-" and the first
2854 character, in the hope this might squeeze out yet more improvement.
2856 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2857 flag allowing group syntax was set by the header_syntax check but not
2858 turned off, possible causing trouble later; (2) The flag was not being
2859 set at all for the header_verify test, causing "group"-style headers to
2860 be rejected. I have now set it in this case, and also caused header_
2861 verify to ignore an empty address taken from a group. While doing this, I
2862 came across some other cases where the code for allowing group syntax
2863 while scanning a header line wasn't quite right (mostly, not resetting
2864 the flag correctly in the right place). These bugs could have caused
2865 trouble for malformed header lines. I hope it is now all correct.
2867 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2868 with the "reply" argument non-NULL. The code, however (which originally
2869 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2870 but it didn't always do it. This confused somebody who was copying the
2871 code for some other use. I have removed all the tests.
2873 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2874 feature that was used to support insecure browsers during the U.S. crypto
2875 embargo. It requires special client support, and Exim is probably the
2876 only MTA that supported it -- and would never use it because real RSA is
2877 always available. This code has been removed, because it had the bad
2878 effect of slowing Exim down by computing (never used) parameters for the
2879 RSA_EXPORT functionality.
2881 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2882 authenticator to fail if there's a tab character in the incoming data
2883 (there should never be unless someone is messing about, as it's supposed
2884 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2885 if the connection is using TLS or if the remote IP is the same as the
2886 local IP, and the "valid-client-cert option" if a client certificate has
2889 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2890 authenticators. This can be used for authorization after authentication
2891 succeeds. (In the case of plaintext, it servers for both authentication
2894 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2895 if any retry times were supplied.
2897 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2898 connection, where there is no client IP address to check. In this
2899 situation, the verify now always succeeds.
2901 PH/25 Applied John Jetmore's -Mset patch.
2903 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2905 PH/27 In a string expansion for a processed (not raw) header when multiple
2906 headers of the same name were present, leading whitespace was being
2907 removed from all of them, but trailing whitespace was being removed only
2908 from the last one. Now trailing whitespace is removed from each header
2909 before concatenation. Completely empty headers in a concatenation (as
2910 before) are ignored.
2912 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2913 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2915 PH/29 [Removed. This was a change that I later backed out, and forgot to
2916 correct the ChangeLog entry (that I had efficiently created) before
2917 committing the later change.]
2919 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2920 address errors (4xx response to RCPT) over the same connection as other
2921 messages routed to the same hosts. Such deliveries are always "forced",
2922 so retry times are not inspected. This resulted in far too many retries
2923 for the affected addresses. The effect occurred only when there were more
2924 hosts than the hosts_max_try setting in the smtp transport when it had
2925 the 4xx errors. Those hosts that it had tried were not added to the list
2926 of hosts for which the message was waiting, so if all were tried, there
2927 was no problem. Two fixes have been applied:
2929 (i) If there are any address or message errors in an SMTP delivery, none
2930 of the hosts (tried or untried) are now added to the list of hosts
2931 for which the message is waiting, so the message should not be a
2932 candidate for sending over the same connection that was used for a
2933 successful delivery of some other message. This seems entirely
2934 reasonable: after all the message is NOT "waiting for some host".
2935 This is so "obvious" that I'm not sure why it wasn't done
2936 previously. Hope I haven't missed anything, but it can't do any
2937 harm, as the worst effect is to miss an optimization.
2939 (ii) If, despite (i), such a delivery is accidentally attempted, the
2940 routing retry time is respected, so at least it doesn't keep
2941 hammering the server.
2943 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2944 in ${readsocket because some servers need this prod.
2946 PH/32 Added some extra debug output when updating a wait-xxx database.
2948 PH/33 The hint "could be header name not terminated by colon", which has been
2949 given for certain expansion errors for a long time, was not being given
2950 for the ${if def:h_colon_omitted{... case.
2952 PH/34 The spec says: "With one important exception, whenever a domain list is
2953 being scanned, $domain contains the subject domain." There was at least
2954 one case where this was not true.
2956 PH/35 The error "getsockname() failed: connection reset by peer" was being
2957 written to the panic log as well as the main log, but it isn't really
2958 panic-worthy as it just means the connection died rather early on. I have
2959 removed the panic log writing for the ECONNRESET error when getsockname()
2962 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2963 runs only) independently of the message's sender address. This meant
2964 that, if the 4xx error was in fact related to the sender, a different
2965 message to the same recipient with a different sender could confuse
2966 things. In particular, this can happen when sending to a greylisting
2967 server, but other circumstances could also provoke similar problems.
2968 I have changed the default so that the retry time for these errors is now
2969 based a combination of the sender and recipient addresses. This change
2970 can be overridden by setting address_retry_include_sender=false in the
2973 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2974 remote server are returned as part of bounce messages. This was not
2975 happening for LMTP over a pipe (the lmtp transport), but now it is the
2976 same for both kinds of LMTP.
2978 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2979 in header lines that were in fact CNAMEs. This is no longer the case.
2981 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2982 and queue runs started by the daemon processed all messages. This has
2983 been fixed so that -R and -S can now usefully be given with -q<time>.
2985 PH/40 Import PCRE release 6.7 (fixes some bugs).
2987 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2989 PH/42 Give an error if -q is specified more than once.
2991 PH/43 Renamed the variables $interface_address and $interface_port as
2992 $received_ip_address and $received_port, to make it clear that these
2993 values apply to message reception, and not to the outgoing interface when
2994 a message is delivered. (The old names remain recognized, of course.)
2996 PH/44 There was no timeout on the connect() call when using a Unix domain
2997 socket in the ${readsocket expansion. There now is.
2999 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3000 be meaningful with "accept".
3002 SC/01 Eximstats V1.43
3003 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3005 SC/02 Eximstats V1.44
3006 Use a glob alias rather than an array ref in the generated
3007 parser. This improves both readability and performance.
3009 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3010 Collect SpamAssassin and rejection statistics.
3011 Don't display local sender or destination tables unless
3012 there is data to show.
3013 Added average volumes into the top table text output.
3015 SC/04 Eximstats V1.46
3016 Collect data on the number of addresses (recipients)
3017 as well as the number of messages.
3019 SC/05 Eximstats V1.47
3020 Added 'Message too big' to the list of mail rejection
3021 reasons (thanks to Marco Gaiarin).
3023 SC/06 Eximstats V1.48
3024 Mainlog lines which have GMT offsets and are too short to
3025 have a flag are now skipped.
3027 SC/07 Eximstats V1.49 (Alain Williams)
3028 Added the -emptyok flag.
3030 SC/08 Eximstats V1.50
3031 Fixes for obtaining the IP address from reject messages.
3033 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3034 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3035 whitespace changes from 4.64-PH/27
3037 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3040 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3041 are found, allow negative numbers in numeric criteria)
3043 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3045 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3046 to match changes made in 4.64-PH/43
3048 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3050 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3051 "domain" is actually an IP address, and force a failure. This locks out
3052 those revolvers/nameservers that support "A-for-A" lookups, in
3053 contravention of the specifications.
3055 PH/48 When a host name was looked up from an IP address, and the subsequent
3056 forward lookup of the name timed out, the host name was left in
3057 $sender_host_name, contrary to the specification.
3059 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3060 restricted to single-key lookups, Exim was not diagnosing an error if
3061 * or *@ was used with a query-style lookup.
3063 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3065 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3066 long ago, but noone interested enough thought of it. Let's just say that
3067 the "1.1" means that there are some new functions that weren't there at
3068 some point in the past.
3070 PH/51 Error processing for expansion failure of helo_data from an smtp
3071 transport during callout processing was broken.
3073 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3074 tested/used via the -bh/-bhc/-bs options.
3076 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3077 bug, fixed in subsequent PCRE releases).
3079 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3080 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3082 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3088 SC/01 Use a glob alias rather than an array ref in eximstats generated
3089 parser. This improves both readability and performance.
3091 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3092 Don't display local sender or destination tables in eximstats unless
3093 there is data to show.
3094 Added average volumes into the eximstats top table text output.
3096 SC/03 Collect data on the number of addresses (recipients) as well
3097 as the number of messages in eximstats.
3099 TF/01 Correct an error in the documentation for the redirect router. Exim
3100 does (usually) call initgroups() when daemonizing.
3102 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3103 with consistent privilege compared to when running as a daemon.
3105 TF/03 Note in the spec that $authenticated_id is not set for local
3106 submissions from trusted users.
3108 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3109 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3111 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3112 by adding some example configuration directives to the default
3113 configuration file. A little bit of work is required to uncomment the
3114 directives and define how usernames and passwords are checked, but
3115 there is now a framework to start from.
3117 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3118 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3119 without this. I don't know how relevant this is to other LDAP libraries.
3121 PH/02 Add the verb name to the "unknown ACL verb" error.
3123 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3125 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3127 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3128 directory not expanded when it should be if an expanded home directory
3129 was set for the address (which is overridden by the transport).
3131 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3134 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3135 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3136 because it is too late at that time, and has no effect.
3138 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3139 security issue with \' (bugzilla #107). I could not use the
3140 PQescapeStringConn() function, because it needs a PGconn value as one of
3143 PH/08 When testing addresses using -bt, indicate those final addresses that
3144 are duplicates that would not cause an additional delivery. At least one
3145 person was confused, thinking that -bt output corresponded to deliveries.
3146 (Suppressing duplicates isn't a good idea as you lose the information
3147 about possibly different redirections that led to the duplicates.)
3149 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3150 systems where poll() doesn't work, in particular OS X.
3152 PH/10 Added more information to debugging output for retry time not reached.
3154 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3155 operations in malware.c.
3157 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3160 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3161 syslog_duplication set false, log lines that would normally be written
3162 both the the main log and to the reject log were not written to syslog at
3165 PH/14 In the default configuration, change the use of "message" in ACL warn
3166 statements to "add_header".
3168 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3169 not followed by a command (e.g. "seen endif").
3171 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3172 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3175 PH/17 Added extra conditions to the default value of delay_warning_condition
3179 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3180 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3181 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3184 The Auto-Submitted: and various List- headers are standardised, whereas I
3185 don't think Precedence: ever was.
3187 PH/18 Refactored debugging code in route_finduser() to show more information,
3188 in particular, the error code if getpwnam() issues one.
3190 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3191 This is apparently needed in addition to the PH/07 change above to avoid
3192 any possible encoding problems.
3194 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3195 but not after initializing Perl.
3197 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3198 output them only if debugging. By default they are written stderr,
3199 apparently, which is not desirable.
3201 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3204 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3207 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3209 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3210 authenticated or an ident call has been made. Suppress the default
3211 values for $authenticated_id and $authenticated_sender (but permit -oMai
3212 and -oMas) when testing with -bh.
3214 PH/24 Re-jigged the order of the tests in the default configuration so that the
3215 tests for valid domains and recipients precede the DNS black list and CSA
3216 tests, on the grounds that those ones are more expensive.
3218 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3219 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3220 This bug exists in every version of Exim that I still have, right back to
3223 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3224 However, an attempt to turn on case-sensitivity in a regex key by
3225 including (?-i) didn't work because the subject string was already
3226 lowercased, and the effects were non-intuitive. It turns out that a
3227 one-line patch can be used to allow (?-i) to work as expected.
3233 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3234 other effects) broke the use of negated acl sub-conditions.
3236 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3239 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3240 "Deny" causes Exim to reject the incoming connection with a 554 error.
3241 Unfortunately, if there is a major crisis, such as a disk failure,
3242 tcp-wrappers gives "deny", whereas what one would like would be some
3243 kind of temporary error. A kludge has been added to help with this.
3244 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3245 554 error is used if errno is still zero or contains ENOENT (which occurs
3246 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3249 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3251 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3252 errors. Otherwise a message that provokes a temporary error (when other
3253 messages do not) can cause a whole host to time out.
3255 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3256 addresses were routed directly to files or pipes from a redirect router.
3257 File deliveries just didn't batch; pipe deliveries might have suffered
3260 PH/06 A failure to get a lock for a hints database would erroneously always say
3261 "Failed to get write lock", even when it was really a read lock.
3263 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3264 of 0600. This has been changed to use the value of the lockfile_mode
3265 option (which defaults to 0600).
3267 PH/08 Applied small patch from the Sieve maintainer.
3269 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3270 folder from quota calculations, a direct delivery into this folder messed
3271 up the contents of the maildirsize file. This was because the regex was
3272 used only to exclude .Trash (or whatever) when the size of the mailbox
3273 was calculated. There was no check that a delivery was happening into an
3274 excluded directory. This bug has been fixed by ignoring all quota
3275 processing for deliveries into excluded directories.
3277 PH/10 Added the maildirfolder_create_regex option to appendfile.
3283 PH/01 The code for finding all the local interface addresses on a FreeBSD
3284 system running IPv6 was broken. This may well have applied to all BSD
3285 systems, as well as to others that have similar system calls. The broken
3286 code found IPv4 interfaces correctly, but gave incorrect values for the
3287 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3288 that it would not match correctly against @[] and not recognize the IPv6
3291 PH/02 The ipliteral router was not recognizing addresses of the form user@
3292 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3294 PH/03 Added disable_ipv6.
3296 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3297 decoded form, because it is most often used to construct To: headers
3298 lines in autoreplies, and the decoded form may well be syntactically
3299 invalid. However, $reply_address has leading white space removed, and all
3300 newlines turned into spaces so that the autoreply transport does not
3303 PH/05 If group was specified without a user on a router, and no group or user
3304 was specified on a transport, the group from the router was ignored.
3306 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3307 for visible compile-time settings that can be used to change these
3308 numbers, for those that want even more. Backwards compatibility with old
3309 spool files has been maintained. However, going back to a previous Exim
3310 release will lost any variables that are in spool files.
3312 PH/07 Two small changes when running in the test harness: increase delay when
3313 passing a TCP/IP connection to a new process, in case the original
3314 process has to generate a bounce, and remove special handling of
3315 127.0.0.2 (sic), which is no longer necessary.
3317 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3318 be the same on different OS.
3320 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3323 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3324 whether --show-vars was specified or not
3326 JJ/02 exipick: Added support for new ACL variable spool format introduced
3329 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3330 syntactically invalid From: or Reply-to: line, and a filter used this to
3331 generate an autoreply, and therefore failed to obtain an address for the
3332 autoreply, Exim could try to deliver to a non-existent relative file
3333 name, causing unrelated and misleading errors. What now happens is that
3334 it logs this as a hard delivery error, but does not attempt to create a
3337 PH/11 The exinext utility has a -C option for testing purposes, but although
3338 the given file was scanned by exinext itself; it wasn't being passed on
3339 when Exim was called.
3341 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3342 an end-of-file indication when reading a command response.
3344 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3345 compiled. In many other places in Exim, IPv6 addresses are always
3346 recognized, so I have changed this. It also means that IPv4 domain
3347 literals of the form [IPV4:n.n.n.n] are now always recognized.
3349 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3350 used if the router is not running as root, for example, when verifying at
3351 ACL time, or when using -bh. The debugging output from this situation was
3352 non-existent - all you got was a failure to exec. I have made two
3355 (a) Failures to set uid/gid, the current directory, or a process leader
3356 in a subprocess such as that created by queryprogram now generate
3357 suitable debugging output when -d is set.
3359 (b) The queryprogram router detects when it is not running as root,
3360 outputs suitable debugging information if -d is set, and then runs
3361 the subprocess without attempting to change uid/gid.
3363 PH/15 Minor change to Makefile for building test_host (undocumented testing
3366 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3367 additional section of a DNS packet that returns MX or SRV records.
3368 Instead, it always explicitly searches for A/AAAA records. This avoids
3369 major problems that occur when a DNS server includes only records of one
3370 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3371 fixed another bug: if SRV records were looked up and the corresponding
3372 address records were *not* found in the additional section, the port
3373 values from the SRV records were lost.
3375 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3376 using the correct key (the original address) when searching the retry
3377 rules in order to find which one to use for generating the retry hint.
3379 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3380 adding the default one. Similarly, if it contains a Reply-To: header, the
3381 errors_reply_to option, if set, is not used.
3383 PH/19 When calculating a retry time, Exim used to measure the "time since
3384 failure" by looking at the "first failed" field in the retry record. Now
3385 it does not use this if it is later than than the arrival time of the
3386 message. Instead it uses the arrival time. This makes for better
3387 behaviour in cases where some deliveries succeed, thus re-setting the
3388 "first failed" field. An example is a quota failure for a huge message
3389 when small messages continue to be delivered. Without this change, the
3390 "time since failure" will always be short, possible causing more frequent
3391 delivery attempts for the huge message than are intended.
3392 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3394 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3395 $1, $2, $3) because the numerical variables can be reset during some
3396 expansion items (e.g. "match"), thereby losing the authentication data.
3398 PH/21 Make -bV show the size of off_t variables so that the test suite can
3399 decide whether to run tests for quotas > 2G.
3401 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3402 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3403 filecount value is greater than 2G or if a quota value is greater than 2G
3404 on a system where the size of off_t is not greater than 4, a panic error
3407 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3408 never match. The debug and -bh output now contains an explicit error
3409 message indicating a malformed IPv4 address or mask.
3411 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3412 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3413 PH/23 above applies.
3415 PH/25 Do not write to syslog when running in the test harness. The only
3416 occasion when this arises is a failure to open the main or panic logs
3417 (for which there is an explicit test).
3419 PH/26 Added the /no_tell option to "control=freeze".
3421 PH/27 If a host name lookup failed very early in a connection, for example, if
3422 the IP address matched host_lookup and the reverse lookup yielded a name
3423 that did not have a forward lookup, an error message of the form "no IP
3424 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3425 could be logged. Now it outputs the IP address instead of "NULL".
3427 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3428 allows the sender and the authenticated sender to be set when
3429 submitting a message from within Exim. Since child_open_exim() is
3430 documented for local_scan(), the new function should be too.
3432 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3433 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3434 results in an empty string is now treated as unset.
3436 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3438 PH/31 Added sender_verify_fail logging option.
3440 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3441 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3442 tidied the source and removed it altogether.
3444 PH/33 When a queue run was abandoned because the load average was too high, a
3445 log line was always written; now it is written only if the queue_run log
3446 selector is set. In addition, the log line for abandonment now contains
3447 information about the queue run such as the pid. This is always present
3448 in "start" and "stop" lines but was omitted from the "abandon" line.
3450 PH/34 Omit spaces between a header name and the colon in the error message that
3451 is given when verify = headers_syntax fails (if there are lots of them,
3452 the message gets confusing).
3454 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3455 names, as there are now some PTR records that contain slashes. This check
3456 is only to protect against broken name servers that fall over on strange
3457 characters, so the fact that it applies to all lookups doesn't matter.
3459 PH/36 Now that the new test suite is complete, we can remove some of the
3460 special code in Exim that was needed for the old test suite. For example,
3461 sorting DNS records because real resolvers return them in an arbitrary
3462 order. The new test suite's fake resolver always returns records in the
3465 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3466 bounces) except when queue_only is set, to avoid logging races between
3467 the different processes.
3469 PH/38 Panic-die if .include specifies a non-absolute path.
3471 PH/39 A tweak to the "H" retry rule from its user.
3473 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3474 a label. They prevented compilation on older perls.
3476 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3477 a warning to be raised on newish perls.
3479 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3480 on queue. Changes to match documented behaviour of showing count of
3481 messages matching specified criteria.
3483 PH/40 Changed the default ident timeout from 30s to 5s.
3485 PH/41 Added support for the use of login_cap features, on those BSD systems
3486 that have them, for controlling the resources used by pipe deliveries.
3488 PH/42 The content-scanning code uses fopen() to create files in which to put
3489 message data. Previously it was not paying any attention to the mode of
3490 the files. Exim runs with umask(0) because the rest of the code creates
3491 files with open(), and sets the required mode explicitly. Thus, these
3492 files were ending up world-writeable. This was not a big issue, because,
3493 being within the spool directory, they were not world-accessible. I have
3494 created a function called modefopen, which takes an additional mode
3495 argument. It sets umask(777), creates the file, chmods it to the required
3496 mode, then resets the umask. All the relevant calls to fopen() in the
3497 content scanning code have been changed to use this function.
3499 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3500 to 24 hours. This avoids potential overflow problems when processing G
3501 and H retry rules. I suspect nobody ever tinkers with this value.
3503 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3505 PH/45 When the plaintext authenticator is running as a client, the server's
3506 challenges are checked to ensure they are valid base64 strings. By
3507 default, the authentication attempt is cancelled if an invalid string is
3508 received. Setting client_ignore_invalid_base64 true ignores these errors.
3509 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3510 they are received. Thus, the responses can be made to depend on the
3511 challenges. If an invalid string is ignored, an empty string is placed in
3514 PH/46 Messages that are created by the autoreply transport now contains a
3515 References: header, in accordance with RFCs 2822 and 3834.
3517 PH/47 Added authenticated_sender_force to the smtp transport.
3519 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3521 PH/49 Installed latest patch from the Sieve maintainer.
3523 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3524 was also set, the appendfile transport was unnecessarily scanning a
3525 directory of message files (e.g. for maildir delivery) to find the count
3526 of files (along with the size), even though it did not need this
3527 information. It now does the scan only if it needs to find either the
3528 size of the count of files.
3530 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3532 PH/52 Two bugs concerned with error handling when the smtp transport is
3535 (i) Exim was not creating retry information for temporary errors given
3536 for individual recipients after the DATA command when the smtp transport
3537 was used in LMTP mode. This meant that they could be retried too
3538 frequently, and not timed out correctly.
3540 (ii) Exim was setting the flag that allows error details to be returned
3541 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3542 recipients that were returned after the DATA command.
3544 PH/53 This is related to PH/52, but is more general: for any failing address,
3545 when detailed error information was permitted to be returned to the
3546 sender, but the error was temporary, then after the final timeout, only
3547 "retry timeout exceeded" was returned. Now it returns the full error as
3548 well as "retry timeout exceeded".
3550 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3551 do this, and (what is worse) MTAs that accept it.
3553 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3554 will now be deprecated.
3556 PH/56 New os.c-cygwin from the Cygwin maintainer.
3558 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3559 formats (previously only available in exim formats via -bpr, -bpru,
3560 and -bpra. Now also available in native and exiqgrep formats)
3562 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3563 with very large, slow to parse queues
3565 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3567 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3569 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3570 responses to authentication challenges, though it was showing the
3571 challenges; (ii) I've removed the CR characters from the debug output for
3574 PH/58 Allow for the insertion of a newline as well as a space when a string
3575 is turned into more than one encoded-word during RFC 2047 encoding. The
3576 Sieve code now uses this.
3578 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3579 data_4xx, lost_connection, tls_required.
3581 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3582 message was being sent as an SMTP response.
3584 PH/61 Add -l and -k options to exicyclog.
3586 PH/62 When verifying, if an address was redirected to one new address, so that
3587 verification continued, and the new address failed or deferred after
3588 having set something in $address_data, the value of $address_data was not
3589 passed back to the ACL. This was different to the case when no
3590 redirection occurred. The value is now passed back in both cases.
3592 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3593 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3594 use login_cap.h, so on its own it isn't the distinguishing feature. The
3595 new name refers directly to the setclassresources() function.
3597 PH/65 Added configuration files for NetBSD3.
3599 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3601 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3602 is preferred over IPv4.
3604 PH/68 The bounce_return_message and bounce_return_body options were not being
3605 honoured for bounces generated during the reception of non-SMTP messages.
3606 In particular, this applied to messages rejected by the ACL. This bug has
3607 been fixed. However, if bounce_return_message is true and bounce_return_
3608 body is false, the headers that are returned for a non-SMTP message
3609 include only those that have been read before the error was detected.
3610 (In the case of an ACL rejection, they have all been read.)
3612 PH/69 The HTML version of the specification is now built in a directory called
3613 spec_html instead of spec.html, because the latter looks like a path with
3614 a MIME-type, and this confuses some software.
3616 PH/70 Catch two compiler warnings in sieve.c.
3618 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3619 function verify_get_ident() calls ip_connect() to connect a socket, but
3620 if the "connect()" function timed out, ip_connect() used to close the
3621 socket. However, verify_get_ident() also closes the socket later, and in
3622 between Exim writes to the log, which may get opened at this point. When
3623 the socket was closed in ip_connect(), the log could get the same file
3624 descriptor number as the socket. This naturally causes chaos. The fix is
3625 not to close the socket in ip_connect(); the socket should be closed by
3626 the function that creates it. There was only one place in the code where
3627 this was missing, in the iplookup router, which I don't think anybody now
3628 uses, but I've fixed it anyway.
3630 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3631 well as to direct DNS lookups. Otherwise the handling of names in host
3632 lists is inconsistent and therefore confusing.
3638 PH/01 Two changes to the default runtime configuration:
3640 (1) Move the checks for relay_from_hosts and authenticated clients from
3641 after to before the (commented out) DNS black list checks.
3643 (2) Add control=submission to the relay_from_hosts and authenticated
3644 clients checks, on the grounds that messages accepted by these
3645 statements are most likely to be submissions.
3647 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3649 (1) Generate an error if the third argument for the ${prvs expansion is
3652 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3655 (3) Reset the variables that are obtained from the first argument of
3656 ${prvscheck and used in the second argument before leaving the code,
3657 because their memory is reclaimed, so using them afterwards may do
3660 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3661 one (it's much easier than Tom thought :-).
3663 (5) Because of (4), we can now allow for the use of $prvscheck_result
3664 inside the third argument.
3666 PH/03 For some reason, the default setting of PATH when running a command from
3667 a pipe transport was just "/usr/bin". I have changed it to
3670 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3671 anything to be listed in the output from -bV.
3673 PH/05 When a filter generated an autoreply, the entire To: header line was
3674 quoted in the delivery log line, like this:
3676 => >A.N.Other <ano@some.domain> <original@ddress> ...
3678 This has been changed so that it extracts the operative address. There
3679 may be more than one such address. If so, they are comma-separated, like
3682 => >ano@some.domain,ona@other.domain <original@ddress> ...
3684 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3685 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3686 not being looked up in the rDNS to get a host name, Exim was showing the
3687 IP address twice in Received: lines, even though the IP addresses were
3688 identical. For example:
3690 Received: from [1.2.3.4] (helo=[1.2.3.4])
3692 However, if the real host name was known, it was omitting the HELO data
3693 if it matched the actual IP address. This has been tidied up so that it
3694 doesn't show the same IP address twice.
3696 PH/07 When both +timestamp and +memory debugging was on, the value given by
3697 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3698 called by the debug printing, thereby overwriting the timestamp buffer.
3699 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3701 PH/08 When the original message was included in an autoreply transport, it
3702 always said "this is a copy of the message, including all the headers",
3703 even if body_only or headers_only was set. It now gives an appropriate
3706 PH/09 Applied a patch from the Sieve maintainer which:
3708 o fixes some comments
3709 o adds the (disabled) notify extension core
3710 o adds some debug output for the result of if/elsif tests
3711 o points to the current vacation draft in the documentation
3712 and documents the missing references header update
3716 o fixes a bug in processing the envelope test (when testing
3717 multiple envelope elements, the last element determined the
3720 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3721 Electronic Mail") by including:
3723 Auto-submitted: auto-generated
3725 in the messages that it generates (bounce messages and others, such as
3726 warnings). In the case of bounce messages for non-SMTP messages, there was
3727 also a typo: it was using "Auto_submitted" (underscore instead of
3728 hyphen). Since every message generated by Exim is necessarily in response
3729 to another message, thes have all been changed to:
3731 Auto-Submitted: auto-replied
3733 in accordance with these statements in the RFC:
3735 The auto-replied keyword:
3737 - SHOULD be used on messages sent in direct response to another
3738 message by an automatic process,
3740 - MUST NOT be used on manually-generated messages,
3742 - MAY be used on Delivery Status Notifications (DSNs) and Message
3743 Disposition Notifications (MDNs),
3745 - MUST NOT be used on messages generated by automatic or periodic
3746 processes, except for messages which are automatic responses to
3749 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3750 to the default Received: header definition.
3752 PH/12 Added log selector acl_warn_skipped (default on).
3754 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3755 variables because (a) they are in the wrong storage pool and (b) even if
3756 they were copied, it wouldn't work properly because of the caching.
3758 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3759 checking when decoding. Apparently there are clients that generate
3760 overlong encoded strings. Why am I not surprised?
3762 PH/15 If the first argument of "${if match_address" was not empty, but did not
3763 contain an "@" character, Exim crashed. Now it writes a panic log message
3764 and treats the condition as false.
3766 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3768 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3769 extension "envelope-auth". The code is finished and in agreement with
3770 other implementations, but there is no documentation so far and in fact,
3771 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3772 not changing the active code.
3774 Print executed "if" and "elsif" statements when debugging is used. This
3775 helps a great deal to understand what a filter does.
3777 Document more things not specified clearly in RFC3028. I had all this
3778 sorted out, when out of a sudden new issues came to my mind. Oops."
3780 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3783 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3784 canonical form (as documented). However, after a host name lookup from
3785 the IP address, check_host() was doing a simple string comparison with
3786 addresses acquired from the DNS when checking that the found name did
3787 have the original IP as one of its addresses. Since any found IPv6
3788 addresses are likely to be in abbreviated form, the comparison could
3789 fail. Luckily, there already exists a function for doing the comparison
3790 by converting both addresses to binary, so now that is used instead of
3791 the text comparison.
3793 PH/20 There was another similar case to PH/19, when a complete host name was
3794 given in a host list; looking up its IP address could give an abbreviated
3795 form, whereas the current host's name might or might not be abbreviated.
3796 The same fix has been applied.
3802 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3803 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3806 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3807 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3809 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3811 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3812 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3813 Also, for "Auto-Submitted", treat anything other than "no" as
3814 non-personal, in accordance with RFC 3834. (Previously it treated
3815 anything starting "auto-" as non-personal.)
3817 TF/01 The control=submission/name=... option had a problem with syntax
3818 errors if the name included a slash character. The /name= option
3819 now slurps the rest of the string, so it can include any characters
3820 but it must come last in the list of options (after /sender_retain
3823 PH/05 Some modifications to the interface to the fake nameserver for the new
3831 TK/01 Added the "success_on_redirect" address verification option. See
3832 NewStuff for rationale and an example.
3834 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3836 PH/02 Patch to exigrep to allow it to work on syslog lines.
3838 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3839 fread() to skip over the body file's header line, because in Cygwin the
3840 header line is locked and is inaccessible.
3842 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3843 co-exist for some time) to make it clear that it is the Exim ID that is
3844 referenced, not the Message-ID: header line.
3846 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3847 string_format() function, because snprintf() does not exist on all
3850 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3851 ${stat: expansion item.
3853 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3854 protocol synchronization error", to keep the pedants happy.
3856 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3857 well as for IRIX systems, when gcc is being used. See the host.c source
3860 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3862 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3865 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3866 transport and to the smtp transport in LMTP mode.
3868 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3870 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3871 run a filter in a subprocess. This could lead to confusion in subsequent
3872 lookups in the parent process. There should also be a search_tidyup() at
3873 the end of the subprocess.
3875 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3876 only if the host matched helo_try_verify_hosts, which caused the
3877 verification to occur when the EHLO/HELO command was issued. The ACL just
3878 tested the remembered result. Now, if a previous verification attempt has
3879 not happened, "verify = helo" does it there and then.
3881 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3883 TK/03 Fix log output including CR from clamd.
3885 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3886 exist provoked a memory error which could cause a segfault.
3888 PH/15 Installed PCRE 6.2
3890 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3892 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3893 of the problem. Specifically, suggested +O2 rather than +O1 for the
3896 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3898 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3899 record, the port was not correctly logged when the outgoing_port log
3900 selector was set (it logged the transort's default port).
3902 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3903 fallback_hosts, and "hosts" in the smtp transport.
3905 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3906 host errors such as "Connection refused".
3908 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3909 authentication with radiusclient 0.4.9:
3911 - Error returned from rc_read_config was caught wrongly
3912 - Username/password not passed on to radius server due to wrong length.
3914 The presumption is that some radiusclient API changes for 4.51/PH/17
3915 were not taken care of correctly. The code is still untested by me (my
3916 Linux distribution still has 0.3.2 of radiusclient), but it was
3917 contributed by a Radius user.
3919 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3920 expanding the "port" option of the smtp transport.
3922 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3923 while reading a MIME header. Thanks to Tom Hughes for a patch.
3925 PH/24 Include config.h inside local_scan.h so that configuration settings are
3928 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3929 that in an ACL for RCPT (for example), you can examine exactly what was
3932 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3933 commands, but it was not correctly comparing the address with the actual
3934 client host address. Thus, it would show the EHLO address in Received:
3935 header lines when this was not necessary.
3937 PH/27 Added the % operator to ${eval:}.
3939 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3940 it should be ignoring failures (because with -C, for example, it has lost
3941 privilege). It wasn't ignoring creation failures other than "already
3944 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3947 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3948 because an input line was too long, either on its own, or by virtue of
3949 too many continuations, the temporary file was not being removed, and the
3950 return code was incorrect.
3952 PH/31 Missing "BOOL" in function definition in filtertest.c.
3954 PH/32 Applied Sieve patches from the maintainer.
3956 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3958 PH/33 Added "verify = not_blind".
3960 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3961 Local/Makefile (with some defaults set). These are used in built scripts
3962 such as exicyclog, but they have never been used in the exim_install
3963 script (though there are many overriding facilities there). I have
3964 arranged that the exim_install script now takes note of these two
3967 PH/35 Installed configuration files for Dragonfly.
3969 PH/36 When a locally submitted message by a trusted user did not contain a
3970 From: header, and the sender address was obtained from -f or from an SMTP
3971 MAIL command, and the trusted user did not use -F to supply a sender
3972 name, $originator_name was incorrectly used when constructing a From:
3973 header. Furthermore, $originator_name was used for submission mode
3974 messages from external hosts without From: headers in a similar way,
3975 which is clearly wrong.
3977 PH/37 Added control=suppress_local_fixups.
3979 PH/38 When log_selector = +received_sender was set, and the addition of the
3980 sender made the log line's construction buffer exactly full, or one byte
3981 less than full, an overflow happened when the terminating "\n" was
3984 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3985 when the result of a list match is failure because a DNS lookup failed.
3987 PH/40 RM_COMMAND is now used in the building process.
3989 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3990 the "build-* directories that it finds.
3992 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3993 address in a domain literal was a prefix of an interface address.
3995 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3996 when verifying a sender address, unless rewrite_headers is false.
3998 PH/44 Wrote a long comment about why errors_to addresses are verified as
3999 recipients, not senders.
4001 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4002 the ratelimit ACL was added.
4004 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4006 PH/46 Added extra information about PostgreSQL errors to the error string.
4008 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4009 avoiding the need to install special zones in a real server. This is
4010 backwards compatible; if it can't find the fake resolver, it drops back.
4011 Thus, both old and new test suites can be run.
4013 TF/02 Added util/ratelimit.pl
4015 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4016 clock is set back in time.
4018 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4019 Candler <B.Candler@pobox.com>.
4021 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4022 OK for addresses that are the result of redirections.
4024 PH/48 A number of further additions for the benefit of the new test suite,
4025 including a fake gethostbyname() that interfaces to the fake DNS resolver
4028 TF/06 The fix for widen_domains has also been applied to qualify_single and
4029 search_parents which are the other dnslookup options that can cause
4032 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4035 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4037 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4038 service" if it encountered an MX record with an empty target hostname.
4039 The message is now "an MX or SRV record indicated no SMTP service".
4041 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4042 if the DNS of the sending site is misconfigured. This is quite a
4043 common situation. This change restores the behaviour of treating a
4044 helo verification defer as a failure.
4046 PH/51 If self=fail was set on a router, the bounce message did not include the
4047 actual error message.
4053 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4055 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4056 command itself ended in error, the underlying message about the transport
4057 filter timeout was being overwritten with the pipe command error. Now the
4058 underlying error message should be appended to the second error message.
4060 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4062 PH/02 Reduce the amount of output that "make" produces by default. Full output
4063 can still be requested.
4065 PH/03 The warning log line about a condition test deferring for a "warn" verb
4066 was being output only once per connection, rather than after each
4067 occurrence (because it was using the same function as for successful
4068 "warn" verbs). This seems wrong, so I have changed it.
4070 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4071 it should not have, which might have caused a crash in the right
4072 circumstances, but probably never did.
4074 PH/04 Installed a modified version of Tony Finch's patch to make submission
4075 mode fix the return path as well as the Sender: header line, and to
4076 add a /name= option so that you can make the user's friendly name appear
4079 TF/03 Added the control = fakedefer ACL modifier.
4081 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4082 Mark Lowes for thorough testing.
4084 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4086 TK/03 Merged latest SRS patch from Miles Wilton.
4088 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4089 with the definition in sysexits.h (which is #included earlier).
4090 Fortunately, Exim does not actually use EX_OK. The code used to try to
4091 preserve the sysexits.h value, by assuming that macro definitions were
4092 scanned for macro replacements. I have been disabused of this notion,
4093 so now the code just undefines EX_OK before #including unistd.h.
4095 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4096 in the smtp transport. When a block could not be written in a single
4097 write() function, the timeout was being re-applied to each part-write.
4098 This seems wrong - if the receiver was accepting one byte at a time it
4099 would take for ever. The timeout is now adjusted when this happens. It
4100 doesn't have to be particularly precise.
4102 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4103 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4105 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4106 without a domain if the check to <postmaster@domain> fails.
4108 SC/01 Eximstats: added -xls and the ability to specify output files
4109 (patch written by Frank Heydlauf).
4111 SC/02 Eximstats: use FileHandles for outputting results.
4113 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4115 SC/04 Eximstats: fixed display of large numbers with -nvr option
4117 SC/05 Eximstats: fixed merging of reports with empty tables.
4119 SC/06 Eximstats: added the -include_original_destination flag
4121 SC/07 Eximstats: removed tabs and trailing whitespace.
4123 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4125 TK/06 MBOX spool code: Add real "From " MBOX separator line
4126 so the .eml file is really in mbox format (even though
4127 most programs do not really care). Patch from Alex Miller.
4129 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4130 The latter is generated from $received_to and is only set if the
4131 message has one envelope recipient. SA can use these headers,
4132 obviously out-of-the-box. Patch from Alex Miller.
4134 PH/08 The ${def test on a variable was returning false if the variable's
4135 value was "0", contrary to what the specification has always said!
4136 The result should be true unless the variable is empty.
4138 PH/09 The syntax error of a character other than { following "${if
4139 def:variable_name" (after optional whitespace) was not being diagnosed.
4140 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4141 accidental colon was present, for example, could give incorrect results.
4143 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4144 result is used (not including appendfile, where other changes are about
4147 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4148 This involved changing a lot of size variables from int to off_t. It
4149 should work with maildirs and everything.
4151 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4152 spamd dying while we are connected to it.
4154 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4157 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4158 function for BDB 4.3.
4160 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4162 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4163 the sources for PCRE have been re-arranged and more files are now
4166 PH/15 The code I had for printing potentially long long variables in PH/11
4167 above was not the best (it lost precision). The length of off_t variables
4168 is now inspected at build time, and an appropriate printing format (%ld
4169 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4170 to be "long long int" or "long int". This is needed for the internal
4171 formatting function string_vformat().
4173 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4174 the configuration file to be ":syslog", then the script "guesses" where
4175 the logs files are, rather than using the compiled in default. In our
4176 case the guess is not the same as the compiled default, so the script
4177 suddenly stopped working when I started to use syslog. The patch checks
4178 to see if log_file_path is "". If so, it attempts to read it from exim
4179 with no configuration file to get the compiled in version, before it
4180 falls back to the previous guessing code."
4182 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4183 implementing BATV in an Exim configuration. See NewStuff for the gory
4186 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4187 Makefile that are specific to HP-UX.
4189 PH/18 If the "use_postmaster" option was set for a recipient callout together
4190 with the "random" option, the postmaster address was used as the MAIL
4191 FROM address for the random test, but not for the subsequent recipient
4192 test. It is now used for both.
4194 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4195 patch removes a few documentation additions to RFC 3028, because the
4196 latest draft now contains them. It adds the new en;ascii-case comparator
4197 and a new error check for 8bit text in MIME parts. Comparator and
4198 require names are now matched exactly. I enabled the subaddress
4199 extension, but it is not well tested yet (read: it works for me)."
4201 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4202 rework some of the code of TK/09 above to avoid the hardwired use of
4203 "%lld" and "long long". Replaced the call to snprintf() with a call to
4206 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4207 records point to non-existent hosts", "retry timeout exceeded", and
4208 "retry time not reached for any host after a long failure period".
4210 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4211 experimental DomainKeys support:
4213 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4214 (2) On an error such as an illegally used "control", the wrong name for
4215 the control was given.
4217 These problems did NOT occur unless DomainKeys support was compiled.
4219 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4221 PH/24 Added ${if match_ip condition.
4223 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4224 databases so that it will be absolutely obvious if a crash occurs in the
4225 DB library. This is a regular occurrence (often caused by mis-matched
4228 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4229 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4230 picked up on a user's system that detects such things. There doesn't seem
4231 to be a gcc warning option for this - only an attribute that has to be
4232 put on the function's prototype. It seems that in Fedora Core 4 they have
4233 set this on a number of new functions. No doubt there will be more in due
4236 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4237 specify a transport. However, if an address that was verified by such a
4238 router was the subject of a callout, Exim crashed because it tried to
4239 read the rcpt_include_affixes from the non-existent transport. Now it
4240 just assumes that the setting of that option is false. This bug was
4241 introduced by 4.51/PH/31.
4243 PH/28 Changed -d+all to exclude +memory, because that information is very
4244 rarely of interest, but it makes the output a lot bigger. People tend to
4245 do -d+all out of habit.
4247 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4248 code in os-type was giving problems when libc.so lives in lib64, like on
4251 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4252 aren't the modern standard, and it seems that some systems' include files
4253 don't always have them. Exim was already checking for some of the newer
4254 ones like T_AAAA, and defining it itself. I've added checks for all the
4255 record types that Exim uses.
4257 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4258 not automatically generating a new one, as it is supposed to. This
4259 prevented TLS from working. If the file did exist, but contained invalid
4260 data, a new version was generated, as expected. It was only the case of a
4261 non-existent file that was broken.
4263 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4264 with a change in libdomainkeys > 0.64.
4266 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4267 from DNS. If the selector record carries the flag, it now has
4268 precedence over the domain-wide flag.
4270 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4272 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4273 the use of a port name that isn't defined in /etc/services) occurred, the
4274 message was deferred as in a normal delivery, and thus remained on the
4275 spool, instead of being failed because of the mua_wrapper setting. This
4276 is now fixed, and I tidied up some of the mua_wrapper messages at the
4279 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4280 the messages in a hash of arrays rather than using individual hashes.
4281 This is a bit cleaner and results in dramatic memory savings, albeit
4282 at a slight CPU cost.
4284 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4285 as requested by Marc Sherman.
4287 SC/10 Eximstats: added histograms for user specified patterns as requested
4290 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4292 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4293 fopen() in the content-scanning modules that did not already have it.
4299 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4300 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4302 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4304 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4306 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4307 to test Sieve filters that use "vacation".
4309 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4310 that changes the way the GnuTLS parameters are stored in the cache file.
4311 The new format can be generated externally. For backward compatibility,
4312 if the data in the cache doesn't make sense, Exim assumes it has read an
4313 old-format file, and it generates new data and writes a new file. This
4314 means that you can't go back to an older release without removing the
4317 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4318 work if there are any delivery delays because "one_time" forces the
4319 parent to be marked "delivered", so its unseen clone is never tried
4320 again. For this reason, Exim now forbids the simultaneous setting of
4323 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4324 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4325 entry if you want to know the details. The fix, however, neglected to
4326 consider the case when local delivery batching is involved. The test for
4327 "previously delivered" was not happening when checking to see if an
4328 address could be batched with a previous (undelivered) one; under
4329 certain circumstances this could lead to multiple deliveries to the same
4332 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4333 in its include files, and this causes problems building Exim.
4335 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4336 header_syntax) but Exim was just ignoring anything given after a slash.
4337 In particular, this caused confusion with an attempt to use "verify =
4338 reverse_host_lookup/defer_ok". An error is now given when options are
4339 supplied for verify items that do not have them. (Maybe reverse_host_
4340 lookup should have a defer_ok option, but that's a different point.)
4342 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4343 defined by RFC 821) to 2048, because there were problems with some AUTH
4344 commands, and RFC 1869 says the size should be increased for extended
4345 SMTP commands that take arguments.
4347 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4350 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4351 "unknown" error; now it says that the functionality isn't in the binary.
4353 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4354 an address' error message when a string expansion fails (syntax or
4355 whatever). Otherwise the password may appear in the log. Following change
4356 PH/42 below, there is no longer a chance of it appearing in a bounce
4359 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4361 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4362 of its addresses was ever tried. (Bugzilla bug #2.)
4364 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4365 the result incorrectly in the debug output. (It correctly added a newline
4366 to what was transported.)
4368 TF/01 Added $received_time.
4370 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4371 commented out examples of how to interface to a virus scanner and to
4372 SpamAssassin. Also added commented examples of av_scanner and
4373 spamd_address settings.
4375 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4376 and controls are allowed in which ACLs. There were a couple of minor
4377 errors. Some of the entries in the conditions table (which is a table of
4378 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4379 negation of where the condition IS allowed.
4381 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4383 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4384 header file does not have a version number, so I've had to invent a new
4385 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4386 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4387 radiusclient), but it was contributed by a Radius user.
4389 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4390 files or directories, for OpenSSL.
4392 PH/19 When an Exim process that is running as root has to create an Exim log
4393 file, it does so in a subprocess that runs as exim:exim so as to get the
4394 ownership right at creation (otherwise, other Exim processes might see
4395 the file with the wrong ownership). There was no test for failure of this
4396 fork() call, which would lead to the process getting stuck as it waited
4397 for a non-existent subprocess. Forks do occasionally fail when resources
4398 run out. I reviewed all the other calls to fork(); they all seem to check
4401 PH/20 When checking for unexpected SMTP input at connect time (before writing
4402 the banner), Exim was not dealing correctly with a non-positive return
4403 from the read() function. If the client had disconnected by this time,
4404 the result was a log entry for a synchronization error with an empty
4405 string after "input=" when read() returned zero. If read() returned -1
4406 (an event I could not check), uninitialized data bytes were printed.
4407 There were reports of junk text (parts of files, etc) appearing after
4410 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4412 PH/22 Added support for macro redefinition, and (re)definition in between
4413 driver and ACL definitions.
4415 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4416 forgetting to use the resulting value; it was using the unexpanded value.
4418 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4419 hadn't been configured. The fix is from Juergen Kreileder, who
4420 understands it better than I do:
4422 "Here's what I see happening with three configured cyrus_sasl
4423 authenticators configured (plain, login, cram-md5):
4425 On startup auth_cyrus_sasl_init() gets called for each of these.
4426 This means three calls to sasl_listmech() without a specified mech_list.
4427 => SASL tests which mechs of all available mechs actually work
4428 => three warnings about OTP not working
4429 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4431 With the patch, sasl_listmech() also gets called three times. But now
4432 SASL's mech_list option is set to the server_mech specified in the the
4433 authenticator. Or in other words, the answer from sasl_listmech()
4434 gets limited to just the mech you're testing for (which is different
4436 => the return list contains just 'plain' or 'login', 'cram-md5' or
4437 nothing depending on the value of ob->server_mech.
4439 I've just tested the patch: Authentication still works fine,
4440 unavailable mechs specified in the exim configuration are still
4441 caught, and the auth.log warnings about OTP are gone."
4443 PH/25 When debugging is enabled, the contents of the command line are added
4444 to the debugging output, even when log_selector=+arguments is not
4447 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4448 answer is "GNU", and only if the return is "GNU/something" is the answer
4451 PH/27 $acl_verify_message is now set immediately after the failure of a
4452 verification in an ACL, and so is available in subsequent modifiers. In
4453 particular, the message can be preserved by coding like this:
4455 warn !verify = sender
4456 set acl_m0 = $acl_verify_message
4458 Previously, $acl_verify_message was set only while expanding "message"
4459 and "log_message" when a very denied access.
4461 PH/28 Modified OS/os.c-Linux with
4463 -#ifndef OS_LOAD_AVERAGE
4464 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4466 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4467 nomenclature these days.)
4469 PH/29 Installed patch from the Sieve maintainer that adds the options
4470 sieve_useraddress and sieve_subaddress to the redirect router.
4472 PH/30 In these circumstances:
4473 . Two addresses routed to the same list of hosts;
4474 . First host does not offer TLS;
4475 . First host accepts first address;
4476 . First host gives temporary error to second address;
4477 . Second host offers TLS and a TLS session is established;
4478 . Second host accepts second address.
4479 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4480 and peerdn, if requested) that were in fact used only for the second
4483 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4484 attention to any local part prefix or suffix that was matched by the
4485 router that accepted the address. It now behaves in the same way as it
4486 does for delivery: the affixes are removed from the local part unless
4487 rcpt_include_affixes is set on the transport.
4489 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4490 timeout during the DATA phase of an incoming message.
4492 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4493 applied a patch sanctioned by the Sieve maintainer.
4495 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4496 the uid or gid is negative. A case of a negative gid caused this to be
4497 noticed. The fix allows for either to be negative.
4499 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4500 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4503 PH/36 The change PH/12 above was broken. Fixed it.
4505 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4506 the grounds that routing the same address twice would always produce the
4507 same answer. This might have been true once, but it is certainly no
4508 longer true now. Routing a child address may depend on the previous
4509 routing that produced that child. Some complicated redirection strategies
4510 went wrong when messages had multiple recipients, and made Exim's
4511 behaviour dependent on the order in which the addresses were given.
4513 I have moved the duplicate checking until after the routing is complete.
4514 Exim scans the addresses that are assigned to local and remote
4515 transports, and removes any duplicates. This means that more work will be
4516 done, as duplicates will always all be routed, but duplicates are
4517 presumably rare, so I don't expect this is of any significance.
4519 For deliveries to pipes, files, and autoreplies, the duplicate checking
4520 still happens during the routing process, since they are not going to be
4523 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4524 It corrects a timeout issue with spamd. This is Ian's comment: "The
4525 background is that sometimes spamd either never reads data from a
4526 connection it has accepted, or it never writes response data. The exiscan
4527 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4528 blindly assumes that writes won't block so it may never time out."
4530 PH/39 Allow G after quota size as well as K and M.
4532 PH/40 The value set for $authenticated_id in an authenticator may not contain
4533 binary zeroes or newlines because the value is written to log lines and
4534 to spool files. There was no check on this. Now the value is run through
4535 the string_printing() function so that such characters are converted to
4536 printable escape sequences.
4538 PH/41 $message_linecount is a new variable that contains the total number of
4539 lines in the message. Compare $body_linecount, which is the count for the
4542 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4543 bounce and delay warning messages, except in certain special cases, which
4546 (a) An SMTP error message from a remote host;
4547 (b) A message specified in a :fail: redirection;
4548 (c) A message specified in a "fail" command in a system filter;
4549 (d) A message specified in a FAIL return from the queryprogram router;
4550 (e) A message specified by the cannot_route_message router option.
4552 In these cases only, Exim does include the error details in bounce and
4553 warning messages. There are also a few cases where bland messages such
4554 as "unrouteable address" or "local delivery error" are given.
4556 PH/43 $value is now also set for the "else" part of a ${run expansion.
4558 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4559 being worked on, but at least Exim now implements the latest version to
4562 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4563 process to complete was treated as a delivery failure, a timeout while
4564 writing the message to the pipe was logged, but erroneously treated as a
4565 successful delivery. Such timeouts include transport filter timeouts. For
4566 consistency with the overall process timeout, these timeouts are now
4567 treated as errors, giving rise to delivery failures by default. However,
4568 there is now a new Boolean option for the pipe transport called
4569 timeout_defer, which, if set TRUE, converts the failures into defers for
4570 both kinds of timeout. A transport filter timeout is now identified in
4573 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4574 systems where "make" and "gmake" are different, calling "gmake" at top
4575 level broke things. I've arranged for the value of $(MAKE) to be passed
4576 from the Makefile to this script so that it can call the same version of
4580 A note about Exim versions 4.44 and 4.50
4581 ----------------------------------------
4583 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4584 changes of various kinds. As a consequence, a big documentation update was
4585 needed. This delayed the release for rather longer than seemed good, especially
4586 in the light of a couple of (minor) security issues. Therefore, the changes
4587 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4588 release. So 4.44 and 4.50 are in effect two different branches that both start
4591 I have left the 4.50 change log unchanged; it contains all the changes since
4592 4.43. The change log for 4.44 is below; many of its items are identical to
4593 those for 4.50. This seems to be the most sensible way to preserve the
4594 historical information.
4600 1. Minor wording change to the doc/README.SIEVE file.
4602 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4603 computation of the current number of files was incorrect.
4605 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4606 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4609 4. Give more explanation in the error message when the command for a transport
4610 filter fails to execute.
4612 5. There are several places where Exim runs a non-Exim command in a
4613 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4614 was being done only for the command run by the queryprogram router. It is
4615 now done for all such subprocesses. The other cases are: ${run, transport
4616 filters, and the commands run by the lmtp and pipe transports.
4618 6. Added CONFIGURE_GROUP build-time option.
4620 7. Some older OS have a limit of 256 on the maximum number of file
4621 descriptors. Exim was using setrlimit() to set 1000 as a large value
4622 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4623 systems. I've change it so that if it can't get 1000, it tries for 256.
4625 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4626 was an oversight, and furthermore, ever since the addition of extra
4627 controls (e.g. 4.43/32), the checks on when to allow different forms of
4628 "control" were broken. There should now be diagnostics for all cases when a
4629 control that does not make sense is encountered.
4631 9. Added the /retain_sender option to "control=submission".
4633 10. $recipients is now available in the predata ACL (oversight).
4635 11. Tidy the search cache before the fork to do a delivery from a message
4636 received from the command line. Otherwise the child will trigger a lookup
4637 failure and thereby defer the delivery if it tries to use (for example) a
4638 cached ldap connection that the parent has called unbind on.
4640 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4641 of $address_data from the recipient verification was clobbered by the
4642 sender verification.
4644 13. The value of address_data from a sender verification is now available in
4645 $sender_address_data in subsequent conditions in the ACL statement.
4647 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4649 15. Added a new option "connect=<time>" to callout options, to set a different
4652 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4653 was its contents. (It was OK if the option was not defined at all.)
4655 17. A "Completed" log line is now written for messages that are removed from
4656 the spool by the -Mrm option.
4658 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4659 information about exactly what failed.
4661 19. Added -dd to debug only the daemon process.
4663 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4664 handles timeouts, both on the server side and network timeouts. Renamed the
4665 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4667 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4668 It is now set to "smtps".
4670 22. $host_address is now set to the target address during the checking of
4671 ignore_target_hosts.
4673 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4674 being passed; this would have caused $sender_host_name to have been used if
4675 matching the list had actually called for a host name (not very likely,
4676 since this list is usually IP addresses). A host name is now passed as
4679 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4680 code that specifies a non-restarting handler (typically sigaction() in
4681 modern systems) in an attempt to fix a rare and obscure crash bug.
4683 25. Narrowed the window for a race in the daemon that could cause it to ignore
4684 SIGCHLD signals. This is not a major problem, because they are used only to
4685 wake it up if nothing else does.
4687 26. A malformed maildirsize file could cause Exim to calculate negative values
4688 for the mailbox size or file count. Odd effects could occur as a result.
4689 The maildirsize information is now recalculated if the size or filecount
4692 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4693 support for a long time. Removed HAVE_SYS_VFS_H.
4695 28. Installed the latest version of exipick from John Jetmore.
4697 29. In an address list, if the pattern was not a regular expression, an empty
4698 subject address (from a bounce message) matched only if the pattern was an
4699 empty string. Non-empty patterns were not even tested. This was the wrong
4700 because it is perfectly reasonable to use an empty address as part of a
4701 database query. An empty address is now tested by patterns that are
4702 lookups. However, all the other forms of pattern expect the subject to
4703 contain a local part and a domain, and therefore, for them, an empty
4704 address still always fails if the pattern is not itself empty.
4706 30. Exim went into a mad DNS loop when attempting to do a callout where the
4707 host was specified on an smtp transport, and looking it up yielded more
4708 than one IP address.
4710 31. Re-factored the code for checking spool and log partition space into a
4711 function that finds that data and another that does the check. The former
4712 is then used to implement four new variables: $spool_space, $log_space,
4713 $spool_inodes, and $log_inodes.
4715 32. The RFC2047 encoding function was originally intended for short strings
4716 such as real names; it was not keeping to the 75-character limit for
4717 encoded words that the RFC imposes. It now respects the limit, and
4718 generates multiple encoded words if necessary. To be on the safe side, I
4719 have increased the buffer size for the ${rfc2047: expansion operator from
4722 33. It is now permitted to omit both strings after an "if" condition; if the
4723 condition is true, the result is "true". As before, when the second string
4724 is omitted, a false condition yields an empty string. This makes it less
4725 cumbersome to write custom ACL and router conditions.
4727 34. Failure to deliver a bounce message always caused it to be frozen, even if
4728 there was an errors_to setting on the router. The errors_to setting is now
4731 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4732 canonical form (fully expanded) before being placed in
4733 $sender_host_address.
4735 36. The table in the code that translates DNS record types into text (T_A to
4736 "A" for instance) was missing entries for NS and CNAME. It is just possible
4737 that this could have caused confusion if both these types were looked up
4738 for the same domain, because the text type is used as part of Exim's
4739 per-process caching. But the chance of anyone hitting this buglet seems
4742 37. The dnsdb lookup has been extended in a number of ways.
4744 (1) There is a new type, "zns", which walks up the domain tree until it
4745 finds some nameserver records. It should be used with care.
4747 (2) There is a new type, "mxh", which is like "mx" except that it returns
4748 just the host names, not the priorities.
4750 (3) It is now possible to give a list of domains (or IP addresses) to be
4751 looked up. The behaviour when one of the lookups defers can be
4752 controlled by a keyword.
4754 (4) It is now possible to specify the separator character for use when
4755 multiple records are returned.
4757 38. The dnslists ACL condition has been extended: it is now possible to supply
4758 a list of IP addresses and/or domains to be looked up in a particular DNS
4761 39. Added log_selector=+queue_time_overall.
4763 40. When running the queue in the test harness, wait just a tad after forking a
4764 delivery process, to get repeatability of debugging output.
4766 41. Include certificate and key file names in error message when GnuTLS fails
4767 to set them up, because the GnuTLS error message doesn't include the name
4768 of the failing file when there is a problem reading it.
4770 42. Allow both -bf and -bF in the same test run.
4772 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4774 44. The "Exiscan patch" is now merged into the mainline Exim source.
4776 45. Sometimes the final signoff response after QUIT could fail to get
4777 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4778 < 0 before doing a fflush(). This bug looks as though it goes back to the
4779 introduction of TLS in release 3.20, but "sometimes" must have been rare
4780 because the tests only now provoked it.
4782 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4783 (this can affect the format of dates).
4785 47. exim_tidydb, when checking for the continued existence of a message for
4786 which it has found a message-specific retry record, was not finding
4787 messages that were in split spool directories. Consequently, it was
4788 deleting retry records that should have stayed in existence.
4790 48. Steve fixed some bugs in eximstats.
4792 49. The SPA authentication driver was not abandoning authentication and moving
4793 on to the next authenticator when an expansion was forced to fail,
4794 contradicting the general specification for all authenticators. Instead it
4795 was generating a temporary error. It now behaves as specified.
4797 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4798 (the order specifies the preference for clients). The order is now AES256,
4799 AES128, 3DES, ARCFOUR128.
4801 51. Small patch to Sieve code - explicitly set From: when generating an
4804 52. Exim crashed if a remote delivery caused a very long error message to be
4805 recorded - for instance if somebody sent an entire SpamAssassin report back
4806 as a large number of 550 error lines. This bug was coincidentally fixed by
4807 increasing the size of one of Exim's internal buffers (big_buffer) that
4808 happened as part of the Exiscan merge. However, to be on the safe side, I
4809 have made the code more robust (and fixed the comments that describe what
4812 53. Now that there can be additional text after "Completed" in log lines (if
4813 the queue_time_overall log selector is set), a one-byte patch to exigrep
4814 was needed to allow it to recognize "Completed" as not the last thing in
4817 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4818 patch that reportedly fixes this has been added. I am not expert enough to
4819 create a test for it. This is what the patch creator wrote:
4821 "I found a little strange behaviour of ldap code when working with
4822 Windows 2003 AD Domain, where users was placed in more than one
4823 Organization Units. When I tried to give exim partial DN, the exit code
4824 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4825 But simultaneously result of request was absolutely normal ldap result,
4826 so I produce this patch..."
4828 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4829 REFERENCE, so I have modified the code to exclude the patch when that macro
4832 55. Some experimental protocols are using DNS PTR records for new purposes. The
4833 keys for these records are domain names, not reversed IP addresses. The
4834 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4835 leaves it alone. Component reversal etc. now happens only for IP addresses.
4838 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4840 57. Double the size of the debug message buffer (to 2048) so that more of very
4841 long debug lines gets shown.
4843 58. The exicyclog utility now does better if the number of log files to keep
4844 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4846 59. Two changes related to the smtp_active_hostname option:
4848 (1) $smtp_active_hostname is now available as a variable.
4849 (2) The default for smtp_banner uses $smtp_active_hostname instead
4850 of $primary_hostname.
4852 60. The host_aton() function is supposed to be passed a string that is known
4853 to be a valid IP address. However, in the case of IPv6 addresses, it was
4854 not checking this. This is a hostage to fortune. Exim now panics and dies
4855 if the condition is not met. A case was found where this could be provoked
4856 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4857 components; fortuitously, this particular loophole had already been fixed
4858 by change 4.50/55 above.
4860 If there are any other similar loopholes, the new check in host_aton()
4861 itself should stop them being exploited. The report I received stated that
4862 data on the command line could provoke the exploit when Exim was running as
4863 exim, but did not say which command line option was involved. All I could
4864 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4865 running as the user.
4868 61. There was a buffer overflow vulnerability in the SPA authentication code
4869 (which came originally from the Samba project). I have added a test to the
4870 spa_base64_to_bits() function which I hope fixes it.
4873 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4874 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4876 63. The daemon start-up calls getloadavg() while still root for those OS that
4877 need the first call to be done as root, but it missed one case: when
4878 deliver_queue_load_max is set with deliver_drop_privilege. This is
4879 necessary for the benefit of the queue runner, because there is no re-exec
4880 when deliver_drop_privilege is set.
4882 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4883 This has been fixed.
4885 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4886 was in use, was not putting the data itself into the right store pool;
4887 consequently, it could be overwritten for a subsequent message in the same
4888 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4891 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4893 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4894 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4895 the function were treating the return as a boolean value, which happened to
4896 work because 0=false and not-0=true, but is not correct code.
4898 68. The host_aton() function was not handling scoped IPv6 addresses (those
4899 with, for example, "%eth0" on the end) correctly.
4901 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4902 negated items (that is, ~something) in unsigned ints. Some compilers
4903 apparently mutter when there is no cast.
4905 70. If an address verification called from an ACL failed, and did not produce a
4906 user-specific message (i.e. there was only a "system" message), nothing was
4907 put in $acl_verify_message. In this situation, it now puts the system
4910 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4911 session; change 4.31/43 added the unwanted input to the log line - except
4912 that it did not do this in the start of session case. It now does.
4914 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4915 This is wrong and can cause the other end to generate a synchronization
4916 error if it is another Exim or anything else that does the synchronization
4917 check. A QUIT command is no longer sent after a timeout.
4919 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4920 during host lookups.
4922 74. The defer_ok option of callout verification was not working if it was used
4923 when verifying addresses in header lines, that is, for this case:
4925 verify = header_sender/callout=defer_ok
4927 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4928 those file descriptors could be used for SMTP connections. If anything
4929 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4930 could be sent to the SMTP client, causing chaos. The daemon now opens
4931 stdin, stdout, and stderr to /dev/null when it puts itself into the
4934 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4935 log by default. The user can override this with suitable Perl magic.
4937 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4938 the log message when discard triggers, was not working for the DATA ACL or
4939 for the non-SMTP ACL.
4941 78. Error message wording change in sieve.c.
4943 79. If smtp_accept_max_per_host was set, the number of connections could be
4944 restricted to fewer than expected, because the daemon was trying to set up
4945 a new connection before checking whether the processes handling previous
4946 connections had finished. The check for completed processes is now done
4947 earlier. On busy systems, this bug wouldn't be noticed because something
4948 else would have woken the daemon, and it would have reaped the completed
4951 80. If a message was submitted locally by a user whose login name contained one
4952 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4953 It caused a spool format error. I have fixed the spool reading code. A
4954 related problem was that the "from" clause in the Received: line became
4955 illegal because of the space(s). It is now covered by ${quote_local_part.
4957 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4960 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4962 83. Patch from Sieve maintainer to fix unterminated string problem in
4963 "vacation" handling.
4965 84. Some minor changes to the Linux configuration files to help with other
4966 OS variants using glibc.
4968 85. One more patch for Sieve to update vacation handling to latest spec.
4971 ----------------------------------------------------
4972 See the note above about the 4.44 and 4.50 releases.
4973 ----------------------------------------------------
4979 1. Change 4.43/35 introduced a bug that caused file counts to be
4980 incorrectly computed when quota_filecount was set in an appendfile
4983 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4984 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4987 3. Give more explanation in the error message when the command for a transport
4988 filter fails to execute.
4990 4. There are several places where Exim runs a non-Exim command in a
4991 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4992 was being done only for the command run by the queryprogram router. It is
4993 now done for all such subprocesses. The other cases are: ${run, transport
4994 filters, and the commands run by the lmtp and pipe transports.
4996 5. Some older OS have a limit of 256 on the maximum number of file
4997 descriptors. Exim was using setrlimit() to set 1000 as a large value
4998 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4999 systems. I've change it so that if it can't get 1000, it tries for 256.
5001 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5002 was an oversight, and furthermore, ever since the addition of extra
5003 controls (e.g. 4.43/32), the checks on when to allow different forms of
5004 "control" were broken. There should now be diagnostics for all cases when a
5005 control that does not make sense is encountered.
5007 7. $recipients is now available in the predata ACL (oversight).
5009 8. Tidy the search cache before the fork to do a delivery from a message
5010 received from the command line. Otherwise the child will trigger a lookup
5011 failure and thereby defer the delivery if it tries to use (for example) a
5012 cached ldap connection that the parent has called unbind on.
5014 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5015 of $address_data from the recipient verification was clobbered by the
5016 sender verification.
5018 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5019 was its contents. (It was OK if the option was not defined at all.)
5021 11. A "Completed" log line is now written for messages that are removed from
5022 the spool by the -Mrm option.
5024 12. $host_address is now set to the target address during the checking of
5025 ignore_target_hosts.
5027 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5028 being passed; this would have caused $sender_host_name to have been used if
5029 matching the list had actually called for a host name (not very likely,
5030 since this list is usually IP addresses). A host name is now passed as
5033 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5034 code that specifies a non-restarting handler (typically sigaction() in
5035 modern systems) in an attempt to fix a rare and obscure crash bug.
5037 15. Narrowed the window for a race in the daemon that could cause it to ignore
5038 SIGCHLD signals. This is not a major problem, because they are used only to
5039 wake it up if nothing else does.
5041 16. A malformed maildirsize file could cause Exim to calculate negative values
5042 for the mailbox size or file count. Odd effects could occur as a result.
5043 The maildirsize information is now recalculated if the size or filecount
5046 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5047 support for a long time. Removed HAVE_SYS_VFS_H.
5049 18. Updated exipick to current release from John Jetmore.
5051 19. Allow an empty sender to be matched against a lookup in an address list.
5052 Previously the only cases considered were a regular expression, or an
5055 20. Exim went into a mad DNS lookup loop when doing a callout where the
5056 host was specified on the transport, if the DNS lookup yielded more than
5059 21. The RFC2047 encoding function was originally intended for short strings
5060 such as real names; it was not keeping to the 75-character limit for
5061 encoded words that the RFC imposes. It now respects the limit, and
5062 generates multiple encoded words if necessary. To be on the safe side, I
5063 have increased the buffer size for the ${rfc2047: expansion operator from
5066 22. Failure to deliver a bounce message always caused it to be frozen, even if
5067 there was an errors_to setting on the router. The errors_to setting is now
5070 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5071 canonical form (fully expanded) before being placed in
5072 $sender_host_address.
5074 24. Updated eximstats to version 1.33
5076 25. Include certificate and key file names in error message when GnuTLS fails
5077 to set them up, because the GnuTLS error message doesn't include the name
5078 of the failing file when there is a problem reading it.
5080 26. Expand error message when OpenSSL has problems setting up cert/key files.
5083 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5084 (this can affect the format of dates).
5086 28. exim_tidydb, when checking for the continued existence of a message for
5087 which it has found a message-specific retry record, was not finding
5088 messages that were in split spool directories. Consequently, it was
5089 deleting retry records that should have stayed in existence.
5091 29. eximstats updated to version 1.35
5092 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5093 1.35 - bugfix such that pie charts by volume are generated correctly
5095 30. The SPA authentication driver was not abandoning authentication and moving
5096 on to the next authenticator when an expansion was forced to fail,
5097 contradicting the general specification for all authenticators. Instead it
5098 was generating a temporary error. It now behaves as specified.
5100 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5101 (the order specifies the preference for clients). The order is now AES256,
5102 AES128, 3DES, ARCFOUR128.
5104 31. Small patch to Sieve code - explicitly set From: when generating an
5107 32. Exim crashed if a remote delivery caused a very long error message to be
5108 recorded - for instance if somebody sent an entire SpamAssassin report back
5109 as a large number of 550 error lines. This bug was coincidentally fixed by
5110 increasing the size of one of Exim's internal buffers (big_buffer) that
5111 happened as part of the Exiscan merge. However, to be on the safe side, I
5112 have made the code more robust (and fixed the comments that describe what
5115 33. Some experimental protocols are using DNS PTR records for new purposes. The
5116 keys for these records are domain names, not reversed IP addresses. The
5117 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5118 leaves it alone. Component reversal etc. now happens only for IP addresses.
5121 34. The host_aton() function is supposed to be passed a string that is known
5122 to be a valid IP address. However, in the case of IPv6 addresses, it was
5123 not checking this. This is a hostage to fortune. Exim now panics and dies
5124 if the condition is not met. A case was found where this could be provoked
5125 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5126 components; fortuitously, this particular loophole had already been fixed
5127 by change 4.50/55 or 4.44/33 above.
5129 If there are any other similar loopholes, the new check in host_aton()
5130 itself should stop them being exploited. The report I received stated that
5131 data on the command line could provoke the exploit when Exim was running as
5132 exim, but did not say which command line option was involved. All I could
5133 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5134 running as the user.
5137 35. There was a buffer overflow vulnerability in the SPA authentication code
5138 (which came originally from the Samba project). I have added a test to the
5139 spa_base64_to_bits() function which I hope fixes it.
5142 36. The daemon start-up calls getloadavg() while still root for those OS that
5143 need the first call to be done as root, but it missed one case: when
5144 deliver_queue_load_max is set with deliver_drop_privilege. This is
5145 necessary for the benefit of the queue runner, because there is no re-exec
5146 when deliver_drop_privilege is set.
5148 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5149 was in use, was not putting the data itself into the right store pool;
5150 consequently, it could be overwritten for a subsequent message in the same
5151 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5154 38. Sometimes the final signoff response after QUIT could fail to get
5155 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5156 < 0 before doing a fflush(). This bug looks as though it goes back to the
5157 introduction of TLS in release 3.20, but "sometimes" must have been rare
5158 because the tests only now provoked it.
5164 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5165 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5166 Now it returns an integer. A number of calls were still expecting a T/F
5167 return. Fortuitously, in all cases, the tests worked in OK situations,
5168 which is the norm. However, things would have gone wrong on any write
5169 failures on the smtp file descriptor. This function is used when sending
5170 messages over SMTP and also when doing verify callouts.
5172 2. When Exim is called to do synchronous delivery of a locally submitted
5173 message (the -odf or -odi options), it no longer closes stderr before doing
5176 3. Implemented the mua_wrapper option.
5178 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5180 5. Implemented the functions header_remove(), header_testname(),
5181 header_add_at_position(), and receive_remove_recipient(), and exported them
5184 6. If an ACL "warn" statement specified the addition of headers, Exim already
5185 inserted X-ACL-Warn: at the start if there was no header name. However, it
5186 was not making this test for the second and subsequent header lines if
5187 there were newlines in the string. This meant that an invalid header could
5188 be inserted if Exim was badly configured.
5190 7. Allow an ACL "warn" statement to add header lines at the start or after all
5191 the Received: headers, as well as at the end.
5193 8. Added the rcpt_4xx retry error code.
5195 9. Added postmaster_mailfrom=xxx to callout verification option.
5197 10. Added mailfrom=xxxx to the callout verification option, for verify=
5200 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5201 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5203 12. Inserted some casts to stop certain compilers warning when using pointer
5204 differences as field lengths or precisions in printf-type calls (mostly
5205 affecting debugging statements).
5207 13. Added optional readline() support for -be (dynamically loaded).
5209 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5210 same clock tick as a message's arrival, so that its received time was the
5211 same as the "first fail" time on the retry record, and that message
5212 remained on the queue past the ultimate address timeout, every queue runner
5213 would try a delivery (because it was past the ultimate address timeout) but
5214 after another failure, the ultimate address timeout, which should have then
5215 bounced the address, did not kick in. This was a "< instead of <=" error;
5216 in most cases the first failure would have been in the next clock tick
5217 after the received time, and all would be well.
5219 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5220 being recognized when the domain list was tested by the match_domain
5221 condition in an expansion string.
5223 16. Added the ${str2b64: operator.
5225 17. Exim was always calling setrlimit() to set a large limit for the number of
5226 processes, without checking whether the existing limit was already
5227 adequate. (It did check for the limit on file descriptors.) Furthermore,
5228 errors from getrlimit() and setrlimit() were being ignored. Now they are
5229 logged to the main and panic logs, but Exim does carry on, to try to do its
5230 job under whatever limits there are.
5232 18. Imported PCRE 5.0.
5234 19. Trivial typo in log message " temporarily refused connection" (the leading
5237 20. If the log selector return_path_on_delivery was set and an address was
5238 redirected to /dev/null, the delivery process crashed because it assumed
5239 that a return path would always be set for a "successful" delivery. In this
5240 case, the whole delivery is bypassed as an optimization, and therefore no
5243 21. Internal re-arrangement: the function for sending a challenge and reading
5244 a response while authentication was assuming a zero-terminated challenge
5245 string. It's now changed to take a pointer and a length, to allow for
5246 binary data in such strings.
5248 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5250 23. Exim was not respecting finduser_retries when seeking the login of the
5251 uid under which it was called; it was always trying 10 times. (The default
5252 setting of finduser_retries is zero.) Also, it was sleeping after the final
5253 failure, which is pointless.
5255 24. Implemented tls_on_connect_ports.
5257 25. Implemented acl_smtp_predata.
5259 26. If the domain in control=submission is set empty, Exim assumes that the
5260 authenticated id is a complete email address when it generates From: or
5261 Sender: header lines.
5263 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5264 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5265 chown and chgrp in /bin and hostname in /usr/bin.
5267 28. Exim was keeping the "process log" file open after each use, just as it
5268 does for the main log. This opens the possibility of it remaining open for
5269 long periods when the USR1 signal hits a daemon. Occasional processlog
5270 errors were reported, that could have been caused by this. Anyway, it seems
5271 much more sensible not to leave this file open at all, so that is what now
5274 29. The long-running daemon process does not normally write to the log once it
5275 has entered its main loop, and it closes the log before doing so. This is
5276 so that log files can straightforwardly be renamed and moved. However,
5277 there are a couple of unusual error situations where the daemon does write
5278 log entries, and I had neglected to close the log afterwards.
5280 30. The text of an SMTP error response that was received during a remote
5281 delivery was being truncated at 512 bytes. This is too short for some of
5282 the long messages that one sometimes sees. I've increased the limit to
5285 31. It is now possible to make retry rules that apply only when a message has a
5286 specific sender, in particular, an empty sender.
5288 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5289 it possible to be selective about when SMTP synchronization is enforced.
5291 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5293 32. Implemented hosts_connection_nolog.
5295 33. Added an ACL for QUIT.
5297 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5300 35. Added mailbox_size and mailbox_filecount to appendfile.
5302 36. Added control = no_multiline_responses to ACLs.
5304 37. There was a bug in the logic of the code that waits for the clock to tick
5305 in the case where the clock went backwards by a substantial amount such
5306 that the microsecond fraction of "now" was more than the microsecond
5307 fraction of "then" (but the whole seconds number was less).
5309 38. Added support for the libradius Radius client library this is found on
5310 FreeBSD (previously only the radiusclient library was supported).
5316 1. When certain lookups returned multiple values in the form name=value, the
5317 quoting of the values was not always being done properly. Specifically:
5318 (a) If the value started with a double quote, but contained no whitespace,
5320 (b) If the value contained whitespace other than a space character (i.e.
5321 tabs or newlines or carriage returns) it was not quoted.
5322 This fix has been applied to the mysql and pgsql lookups by writing a
5323 separate quoting function and calling it from the lookup code. The fix
5324 should probably also be applied to nisplus, ibase and oracle lookups, but
5325 since I cannot test any of those, I have not disturbed their existing code.
5327 2. A hit in the callout cache for a specific address caused a log line with no
5328 reason for rejecting RCPT. Now it says "Previous (cached) callout
5329 verification failure".
5331 3. There was an off-by-one bug in the queryprogram router. An over-long
5332 return line was truncated at 256 instead of 255 characters, thereby
5333 overflowing its buffer with the terminating zero. As well as fixing this, I
5334 have increased the buffer size to 1024 (and made a note to document this).
5336 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5337 when Exim is waiting for an SMTP response from a remote server, Exim
5338 restarts its select() call on the socket, thereby resetting its timeout.
5339 This is not a problem when such interrupts are rare. Somebody set up a cron
5340 job to run exiwhat every 2 minutes, which is less than the normal select()
5341 timeout (5 or 10 minutes). This meant that the select() timeout never
5342 kicked in because it was always reset. I have fixed this by comparing the
5343 time when an interrupt arrives with the time at the start of the first call
5344 to select(). If more time than the timeout has elapsed, the interrupt is
5345 treated as a timeout.
5347 5. Some internal re-factoring in preparation for the addition of Sieve
5348 extensions (by MH). In particular, the "personal" test is moved to a
5349 separate function, and given an option for scanning Cc: and Bcc: (which is
5350 not set for Exim filters).
5352 6. When Exim created an email address using the login of the caller as the
5353 local part (e.g. when creating a From: or Sender: header line), it was not
5354 quoting the local part when it contained special characters such as @.
5356 7. Installed new OpenBSD configuration files.
5358 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5359 try to make them clearer.
5361 9. Callout options, other than the timeout value, were being ignored when
5362 verifying sender addresses in header lines. For example, when using
5364 verify = header_sender/callout=no_cache
5366 the cache was (incorrectly) being used.
5368 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5369 only the Cygwin environment.
5371 11. When return_path_on_delivery was set as a log selector, if different remote
5372 addresses in the same message used different return paths and parallel
5373 remote delivery occurred, the wrong values would sometimes be logged.
5374 (Whenever a remote delivery process finished, the return path value from
5375 the most recently started remote delivery process was logged.)
5377 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5378 lines when AUTH and/or TLS are in use. This is the "received protocol"
5379 field. Exim used to use "asmtp" for authenticated SMTP, without any
5380 indication (in the protocol name) for TLS use. Now it follows the RFC and
5381 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5382 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5383 names appear in log lines as well as in Received: header lines.
5385 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5386 extensions, and comparison tests, and to fix some bugs.
5388 14. Changes to the "personal" filter test:
5390 (1) The test was buggy in that it was just doing the equivalent of
5391 "contains" tests on header lines. For example, if a user's address was
5392 anne@some.where, the "personal" test would incorrectly be true for
5394 To: susanne@some.where
5396 This test is now done by extracting each address from the header in turn,
5397 and checking the entire address. Other tests that are part of "personal"
5398 are now done using regular expressions (for example, to check local parts
5399 of addresses in From: header lines).
5401 (2) The list of non-personal local parts in From: addresses has been
5402 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5403 taken from the Sieve specification recommendations.
5405 (3) If the message contains any header line starting with "List-" it is
5406 treated as non-personal.
5408 (4) The test for "circular" in the Subject: header line has been removed
5409 because it now seems ill-conceived.
5411 15. Minor typos in src/EDITME comments corrected.
5413 16. Installed latest exipick from John Jetmore.
5415 17. If headers_add on a router specified a text string that was too long for
5416 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5417 of string_sprintf() is now avoided.
5419 18. $message_body_size was not set (it was always zero) when running the DATA
5420 ACL and the local_scan() function.
5422 19. For the "mail" command in an Exim filter, no default was being set for
5423 the once_repeat time, causing a random time value to be used if "once" was
5424 specified. (If the value happened to be <= 0, no repeat happened.) The
5425 default is now 0s, meaning "never repeat". The "vacation" command was OK
5426 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5427 (I found it when inspecting the code).
5429 20. There is now an overall timeout for performing a callout verification. It
5430 defaults to 4 times the callout timeout, which applies to individual SMTP
5431 commands during the callout. The overall timeout applies when there is more
5432 than one host that can be tried. The timeout is checked before trying the
5433 next host. This prevents very long delays if there are a large number of
5434 hosts and all are timing out (e.g. when the network connections are timing
5435 out). The value of the overall timeout can be changed by specifying an
5436 additional sub-option for "callout", called "maxwait". For example:
5438 verify = sender/callout=5s,maxwait=20s
5440 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5441 to the end before writing, but this should make it even safer).
5443 22. Exim was forgetting that it had advertised PIPELINING for the second and
5444 subsequent messages on an SMTP connection. It was also not resetting its
5445 memory on STARTTLS and an internal HELO.
5447 23. When Exim logs an SMTP synchronization error within a session, it now
5448 records whether PIPELINING has been advertised or not.
5450 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5451 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5452 rather than long int.
5454 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5456 26. Added the never_mail option to autoreply.
5462 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5463 crash if the getsockname() call failed; this can happen if a connection is
5464 closed very soon after it is established. The problem was simply in the
5465 order in which certain operations were done, causing Exim to try to write
5466 to the SMTP stream before it had set up the file descriptor. The bug has
5467 been fixed by making things happen in the correct order.
5473 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5474 before the connection was closed, thus losing the rejection response.
5476 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5477 some early Solaris releases, but causes trouble in current releases where
5478 socklen_t is defined.
5480 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5483 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5486 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5487 that releasing the top of it at the end releases what was used for sub-
5488 expansions (unless the block got too big). However, discard this block if
5489 the first thing is a variable or header, so that we can use its block when
5490 it is dynamic (useful for very large $message_headers, for example).
5492 6. Lookups now cache *every* query, not just the most recent. A new, separate
5493 store pool is used for this. It can be recovered when all lookup caches are
5494 flushed. Lookups now release memory at the end of their result strings.
5495 This has involved some general refactoring of the lookup sources.
5497 7. Some code has been added to the store_xxx() functions to reduce the amount
5498 of flapping under certain conditions.
5500 8. log_incoming_interface used to affect only the <= reception log lines. Now
5501 it causes the local interface and port to be added to several more SMTP log
5502 lines, for example "SMTP connection from", and rejection lines.
5504 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5506 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5508 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5509 could be overwritten at the end of the current message (or the start of a
5510 new message if it was set in a HELO ACL). The value is now preserved for
5511 the duration of the SMTP connection.
5513 12. If a transport had a headers_rewrite setting, and a matching header line
5514 contained an unqualified address, that address was qualified, even if it
5515 did not match any rewriting rules. The underlying bug was that the values
5516 of the flags that permit the existence of unqualified sender and recipient
5517 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5518 non-local messages, and by -bnq for local messages) were not being
5519 preserved with the message after it was received.
5521 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5522 "next input=" as part of the text comprising the host identity instead of
5523 the correct text. The code was using the same buffer for two different
5524 strings. However, depending on which order the printing function evaluated
5525 its arguments, the bug did not always show up. Under Linux, for example, my
5526 test suite worked just fine.
5528 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5529 doesn't work with some older versions of Perl. It has been changed to "my",
5530 which in any case is probably the better facility to use.
5532 15. A really picky compiler found some instances of statements for creating
5533 error messages that either had too many or two few arguments for the format
5536 16. The size of the buffer for calls to the DNS resolver has been increased
5537 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5538 for addresses that have a lot of PTR records. This alleviates a problem; it
5539 does not fully solve it.
5541 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5542 buffer now truncates the list and logs the incident, which is the same
5543 action as happens when Exim is looking up a host name and its aliases.
5544 Previously in this situation something unpredictable would happen;
5545 sometimes it was "internal error: store_reset failed".
5547 18. If a server dropped the connection unexpectedly when an Exim client was
5548 using GnuTLS and trying to read a response, the client delivery process
5549 crashed while trying to generate an error log message.
5551 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5552 string, for example:
5554 warn message = H1: something\nH2: something
5556 the text was added as a single header line from Exim's point of view
5557 though it ended up OK in the delivered message. However, searching for the
5558 second and subsequent header lines using $h_h2: did not work. This has been
5559 fixed. Similarly, if a system filter added multiple headers in this way,
5560 the routers could not see them.
5562 20. Expanded the error message when iplsearch is called with an invalid key to
5563 suggest using net-iplsearch in a host list.
5565 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5566 ACLs are no longer actually imposed (and a message to that effect is
5569 22. If a "gecos" field in a passwd entry contained escaped characters, in
5570 particular, if it contained a \" sequence, Exim got it wrong when building
5571 a From: or a Sender: header from that name. A second bug also caused
5572 incorrect handling when an unquoted " was present following a character
5573 that needed quoting.
5575 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5576 was not being matched caselessly.
5578 24. Arranged for all hyphens in the exim.8 source to be escaped with
5581 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5582 properly. Recipient callout cache records were still being keyed to include
5583 the sender, even when use_sender was set false. This led to far more
5584 callouts that were necessary. The sender is no longer included in the key
5585 when use_sender is false.
5587 26. Added "control = submission" modifier to ACLs.
5589 27. Added the ${base62d: operator to decode base 62 numbers.
5591 28. dnsdb lookups can now access SRV records.
5593 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5594 the configuration file.
5596 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5597 (-v) mode. This makes the output for a verbose queue run more intelligible.
5599 31. Added a use_postmaster feature to recipient callouts.
5601 32. Added the $body_zerocount variable, containing the number of binary zero
5602 bytes in the message body.
5604 33. The time of last modification of the "new" subdirectory is now used as the
5605 "mailbox time last read" when there is a quota error for a maildir
5608 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5610 35. Added +ignore_unknown as a special item in host lists.
5612 36. Code for decoding IPv6 addresses in host lists is now included, even if
5613 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5614 address was recognized as an IP address, but was then not correctly decoded
5615 into binary, causing unexpected and incorrect effects when compared with
5622 1. Very minor rewording of debugging text in manualroute to say "list of
5623 hosts" instead of "hostlist".
5625 2. If verify=header_syntax was set, and a header line with an unqualified
5626 address (no domain) and a large number of spaces between the end of the
5627 name and the colon was received, the reception process suffered a buffer
5628 overflow, and (when I tested it) crashed. This was caused by some obsolete
5629 code that should have been removed. The fix is to remove it!
5631 3. When running in the test harness, delay a bit after writing a bounce
5632 message to get a bit more predictability in the log output.
5634 4. Added a call to search_tidyup() just before forking a reception process. In
5635 theory, someone could use a lookup in the expansion of smtp_accept_max_
5636 per_host which, without the tidyup, could leave open a database connection.
5638 5. Added the variables $recipient_data and $sender_data which get set from a
5639 lookup success in an ACL "recipients" or "senders" condition, or a router
5640 "senders" option, similar to $domain_data and $local_part_data.
5642 6. Moved the writing of debug_print from before to after the "senders" test
5645 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5646 problems for message scanning, either using a data ACL, or using
5647 local_scan() because the Received: header was not generated till after they
5648 were called (in order to set the time as the time of reception completion).
5649 I have revised the way this works. The header is now generated after the
5650 body is received, but before the ACL or local_scan() are called. After they
5651 are run, the timestamp in the header is updated.
5657 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5658 before starting a queue runner without re-exec. This happened only when
5659 deliver_drop_privilege was set or when the Exim user was set to root. The
5660 effect of the bug was that timeouts during subsequent deliveries caused
5661 crashes instead of being properly handled. The handler is now left at its
5662 default (and expected) setting.
5664 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5665 message, again when deliver_drop_privilege is set or Exim is run as root.
5666 The bug described in (1) was not present in this case, but the tidying up
5667 of the other signals was missing. I have made the two cases consistent.
5669 3. The ignore_target_hosts setting on a manualroute router was being ignored
5670 for hosts that were looked up using the /MX notation.
5672 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5675 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5676 operated on the sender address. After changing the $sender_address to <>
5677 for the sender address verify, Exim was re-instated it as the original
5678 (before rewriting) address, but remembering that it had rewritten it, so it
5679 wasn't rewriting it again. This bug also had the effect of breaking the
5680 sender address verification caching when the sender address was rewritten.
5682 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5683 This has been changed so that if the ip literal address matches
5684 ignore_target_hosts, the router declines.
5686 7. Added expansion conditions match_domain, match_address, and match_local_
5687 part (NOT match_host).
5689 8. The placeholder for the Received: header didn't have a length field set.
5691 9. Added code to Exim itself and to exim_lock to test for a specific race
5692 condition that could lead to file corruption when using MBX delivery. The
5693 issue is with the lockfile that is created in /tmp. If this file is removed
5694 after a process has opened it but before that process has acquired a lock,
5695 there is the potential for a second process to recreate the file and also
5696 acquire a lock. This could lead to two Exim processes writing to the file
5697 at the same time. The added code performs the same test as UW imapd; it
5698 checks after acquiring the lock that its file descriptor still refers to
5699 the same named file.
5701 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5702 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5705 11. Added the smtp_active_hostname option. If used, this will typically be made
5706 to depend on the incoming interface address. Because $interface_address is
5707 not set up until the daemon has forked a reception process, error responses
5708 that can happen earlier (such as "too many connections") no longer contain
5711 12. If an expansion in a condition on a "warn" statement fails because a lookup
5712 defers, the "warn" statement is abandoned, and the next ACL statement is
5713 processed. Previously this caused the whole ACL to be aborted.
5715 13. Added the iplsearch lookup type.
5717 14. Added ident_timeout as a log selector.
5719 15. Added tls_certificate_verified as a log selector.
5721 16. Added a global option tls_require_ciphers (compare the smtp transport
5722 option of the same name). This controls incoming TLS connections.
5724 17. I finally figured out how to make tls_require_ciphers do a similar thing
5725 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5726 before starting the TLS session.
5728 18. Tabs are now shown as \t in -bP output.
5730 19. If the log selector return_path_on_delivery was set, Exim crashed when
5731 bouncing a message because it had too many Received: header lines.
5733 20. If two routers both had headers_remove settings, and the first one included
5734 a superfluous trailing colon, the final name in the first list and the
5735 first name in the second list were incorrectly joined into one item (with a
5736 colon in the middle).
5742 1. Added -C and -D options to the exinext utility, mainly to make it easier
5743 to include in the automated testing, but these could be helpful when
5744 multiple configurations are in use.
5746 2. The exinext utility was not formatting the output nicely when there was
5747 an alternate port involved in the retry record key, nor when there was a
5748 message id as well (for retries that were specific to a specific message
5749 and a specific host). It was also confused by IPv6 addresses, because of
5750 the additional colons they contain. I have fixed the IPv4 problem, and
5751 patched it up to do a reasonable job for IPv6.
5753 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5754 delivery, the log line now contains "pipelined" if PIPELINING was used.
5756 4. An SMTP transport process used to panic and die if the bind() call to set
5757 an explicit outgoing interface failed. This has been changed; it is now
5758 treated in the same way as a connect() failure.
5760 5. A reference to $sender_host_name in the part of a conditional expansion
5761 that was being skipped was still causing a DNS lookup. This no longer
5764 6. The def: expansion condition was not recognizing references to header lines
5765 that used bh_ and bheader_.
5767 7. Added the _cache feature to named lists.
5769 8. The code for checking quota_filecount in the appendfile transport was
5770 allowing one more file than it should have been.
5772 9. For compatibility with Sendmail, the command line option
5780 and sets the incoming protocol and host name (for trusted callers). The
5781 host name and its colon can be omitted when only the protocol is to be set.
5782 Note the Exim already has two private options, -pd and -ps, that refer to
5783 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5784 "s", but I don't think that's a major issue.
5786 10. A number of refactoring changes to the code, none of which should affect
5789 (a) The number of logging options was getting close to filling up the
5790 32-bit word that was used as a bit map. I have split them into two classes:
5791 those that are passed in the argument to log_write(), and those that are
5792 only ever tested independently outside of that function. These are now in
5793 separate 32-bit words, so there is plenty of room for expansion again.
5794 There is no change in the user interface or the logging behaviour.
5796 (b) When building, for example, log lines, the code previously used a
5797 macro that called string_cat() twice, in order to add two strings. This is
5798 not really sufficiently general. Furthermore, there was one instance where
5799 it was actually wrong because one of the argument was used twice, and in
5800 one call a function was used. (As it happened, calling the function twice
5801 did not affect the overall behaviour.) The macro has been replaced by a
5802 function that can join an arbitrary number of extra strings onto a growing
5805 (c) The code for expansion conditions now uses a table and a binary chop
5806 instead of a serial search (which was left over from when there were very
5807 few conditions). Also, it now recognizes conditions like "pam" even when
5808 the relevant support is not compiled in: a suitably worded error message is
5809 given if an attempt is made to use such a condition.
5811 11. Added ${time_interval:xxxxx}.
5813 12. A bug was causing one of the ddress fields not to be passed back correctly
5814 from remote delivery subprocesses. The field in question was not being
5815 subsequently used, so this caused to problems in practice.
5817 13. Added new log selectors queue_time and deliver_time.
5819 14. Might have fixed a bug in maildirsizefile handling that threw up
5820 "unexpected character" debug warnings, and recalculated the data
5821 unnecessarily. In any case, I expanded the warning message to give more
5824 15. Added the message "Restricted characters in address" to the statements in
5825 the default ACL that block characters like @ and % in local parts.
5827 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5828 Three changes have been made:
5830 (a) There was a serious bug; a negative response to MAIL caused the whole
5831 recipient domain to be cached as invalid, thereby blocking all messages
5832 to all local parts at the same domain, from all senders. This bug has
5833 been fixed. The domain is no longer cached after a negative response to
5834 MAIL if the sender used is not empty.
5836 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5839 (c) A new callout option, "use_sender" has been added for people who want
5840 the modified behaviour.
5846 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5849 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5850 indeed breaks things for older releases.
5852 3. Added additional logging to the case where there is a problem reading data
5853 from a filter that is running in a subprocess using a pipe, in order to
5854 try to track down a specific problem.
5856 4. Testing facility fudge: when running in the test harness and attempting
5857 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5858 getting "No route to host". Convert this to a timeout.
5860 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5863 6. Some OS don't have socklen_t but use size_t instead. This affects the
5864 fifth argument of getsockopt() amongst other things. This is now
5865 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5866 can be set for individual OS. I have set it for SunOS5, OSF1, and
5867 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5868 some earlier ones do not.
5870 7. Change 4.30/15 was not doing the test caselessly.
5872 8. The standard form for an IPv6 address literal was being rejected by address
5873 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5874 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5875 this, as well as the form without the "IPv6" on the front (but only when
5876 address literals are enabled, of course).
5878 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5880 10. Exim crashed if a message with an empty sender address specified by -f
5881 encountered a router with an errors_to setting. This could be provoked only
5882 by a command such as
5886 where an empty string was supplied; "<>" did not hit this bug.
5888 11. Installed PCRE release 4.5.
5890 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5891 remained set. It is now erased.
5893 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5894 times from message ids (which are base 36 rather than the normal 62).
5896 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5897 were being counted as actual protocol errors, and logged if the log
5898 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5899 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5900 and DATA following a set of rejected RCPTs do not count as protocol errors.
5901 In other words, Exim assumes they were pipelined, though this may not
5902 actually be the case. Of course, in all cases the client gets an
5903 appropriate error code.
5905 15. If a lookup fails in an ACL condition, a message about the failure may
5906 be available; it is used if testing the ACL cannot continue, because most
5907 such messages specify what the cause of the deferral is. However, some
5908 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5909 that caused an old message to be retained and used if a later statement
5910 caused a defer, replacing the real cause of the deferral.
5912 16. If an IP address had so many PTR records that the DNS lookup buffer
5913 was not large enough to hold them, Exim could crash while trying to process
5914 the truncated data. It now detects and logs this case.
5916 17. Further to 4.21/58, another change has been made: if (and only if) the
5917 first line of a message (the first header line) ends with CRLF, a bare LF
5918 in a subsequent header line has a space inserted after it, so as not to
5919 terminate the header.
5921 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5922 unnecessarily, used atoi() instead of strtol(), and didn't check the
5923 termination when getting file sizes from file names by regex.
5925 19. Completely re-implemented the support for maildirsize files, in the light
5926 of a number of problems with the previous contributed implementation
5927 (4.30/29). In particular:
5929 . If the quota is zero, the maildirsize file is maintained, but no quota is
5932 . If the maildir directory does not exist, it is created before any attempt
5933 to write a maildirsize file.
5935 . The quota value in the file is just a cache; if the quota is changed in
5936 the transport, the new value overrides.
5938 . A regular expression is available for excluding directories from the
5941 20. The autoreply transport checks the characters in options that define the
5942 message's headers; it allows continued headers, but it was checking with
5943 isspace() after an embedded newline instead of explicitly looking for a
5946 21. If all the "regular" hosts to which an address was routed had passed their
5947 expiry times, and had not reached their retry times, the address was
5948 bounced, even if fallback hosts were defined. Now Exim should go on to try
5951 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5952 equivalent code in the SMTP transport. Some hosts send humungous responses
5953 to HELO/EHLO, more than 1024 it seems.
5955 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5956 gives compiler warnings in some environments. I've now done it "properly",
5959 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5960 (because of problems with the built-in one) was declared to return uschar *
5961 instead of char *, causing compiler failure.
5963 25. Fixed a file descriptor leak when processing alias/forward files.
5965 26. Fixed a minor format string issue in dbfn.c.
5967 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5969 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5970 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5973 29. When a sender address is verified, it is cached, to save repeating the test
5974 when there is more than one recipient in a message. However, when the
5975 verification involves a callout, it is possible for different callout
5976 options to be set for different recipients. It is too complicated to keep
5977 track of this in the cache, so now Exim always runs a verification when a
5978 callout is required, relying on the callout cache for the optimization.
5979 The overhead is duplication of the address routing, but this should not be
5982 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5983 to be verified with callout=postmaster, and the main callout worked but the
5984 postmaster check failed, the verification correctly failed. However, if a
5985 subsequent RCPT command asked for sender verification *without* the
5986 postmaster check, incorrect caching caused this verification also to fail,
5989 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5990 it was not caching the DNS options (qualify_single, search_parents) that
5991 were used when the lookup failed. A subsequent lookup with different
5992 options therefore always gave the same answer, though there were cases
5993 where it should not have. (Example: a "domains = !$mx_any" option on a
5994 dnslookup router: the "domains" option is always processed without any
5995 widening, but the router might have qualify_single set.) Now Exim uses the
5996 cached value only when the same options are set.
5998 32. Added John Jetmore's "exipick" utility to the distribution.
6000 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6001 than a timeout (e.g. a certificate is required, and is not provided), an
6002 Exim server now closes the connection immediately. Previously it waited for
6003 the client to close - but if the client is SSL, it seems that they each
6004 wait for each other, leading to a delay before one of them times out.
6006 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6007 maintained 0.8.x compatibility because I don't think many are using it, and
6008 it is clearly obsolete.
6010 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6013 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6014 client certificate was expired. A simple patch fixes this, though I don't
6015 understand the full logic of why the verify callback is called multiple
6018 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6019 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6020 which causes problems with some clients (such as the Certicom SSL Plus
6021 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6022 disables the coutermeasure allowing Eudora to connect."
6024 38. Exim was not checking that a write() to a log file succeeded. This could
6025 lead to Bad Things if a log got too big, in particular if it hit a file
6026 size limit. Exim now panics and dies if it cannot write to a log file, just
6027 as it does if it cannot open a log file.
6029 39. Modified OS/Makefile-Linux so that it now contains
6031 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6033 The two -D definitions ensure that Exim is compiled with large file
6034 support, which makes it possible to handle log files that are bigger than
6037 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6038 instance) a domain was checked against a named list that involved a lookup,
6039 causing $domain_data to be set, then another domain was checked against the
6040 same list, then the first domain was re-checked, the value of $domain_data
6041 after the final check could be wrong. In particular, if the second check
6042 failed, it could be set empty. This bug probably also applied to
6045 41. The strip_trailing_dot option was not being applied to the address given
6046 with the -f command-line option.
6048 42. The code for reading a message's header from the spool was incrementing
6049 $received_count, but never initializing it. This meant that the value was
6050 incorrect (doubled) while delivering a message in the same process in which
6051 it was received. In the most common configuration of Exim, this never
6052 happens - a fresh exec is done - but it can happen when
6053 deliver_drop_privilege is set.
6055 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6056 it now includes up to 150 characters of the unexpected data in the log
6059 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6060 and building data strings. The size of both of these buffers was 10 000
6061 bytes - far larger than anybody would *ever* want, thought I. Needless to
6062 say, somebody hit the limit. I have increased the maximum line length to
6063 20 000 and the maximum data length of concatenated lines to 100 000. I have
6064 also fixed two bugs, because there was no checking on these buffers. Tsk,
6065 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6066 buffer is too small.
6068 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6069 lsearch lookups. Now it does.
6071 46. When parsing a route_list item in a manualroute router, a fixed-length
6072 buffer was used for the list of hosts. I made this 1024 bytes long,
6073 thinking that nobody would ever have a list of hosts that long. Wrong.
6074 Somebody had a whole pile of complicated expansion conditions, and the
6075 string was silently truncated, leading to an expansion error. It turns out
6076 that it is easier to change to an unlimited length (owing to other changes
6077 that have happened since this code was originally written) than to build
6078 structure for giving a limitation error. The length of the item that
6079 expands into the list of hosts is now unlimited.
6081 47. The lsearch lookup could not handle data where the length of text line was
6082 more than 4095 characters. Such lines were truncated, leading to shortened
6083 data being returned. It should now handle lines of any length.
6085 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6086 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6089 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6090 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6091 no longer happens in comment lines. A list of replacements is now placed
6092 at the head of all of the source files, except those whose only change is
6093 to replace PERL_COMMAND in the very first #! line.
6095 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6096 messages on the queue, with a bottom-up merge sort, using code contributed
6097 by Michael Haardt. This should make operations like -bp somewhat faster on
6098 large queues. It won't affect queue runners, except when queue_run_in_order
6101 51. Installed eximstats 1.31 in the distribution.
6103 52. Added support for SRV lookups to the dnslookup router.
6105 53. If an ACL referred to $message_body or $message_body_end, the value was not
6106 reset for any messages that followed in the same SMTP session.
6108 54. The store-handling optimization for building very long strings was not
6109 differentiating between the different store pools. I don't think this
6110 actually made any difference in practice, but I've tidied it.
6112 55. While running the routers to verify a sender address, $sender_address
6113 was still set to the sender address. This is wrong, because when routing to
6114 send a bounce to the sender, it would be empty. Therefore, I have changed
6115 it so that, while verifying a sender address, $sender_address is set to <>.
6116 (There is no change to what happens when verifying a recipient address.)
6118 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6119 target A or AAAA records (if not already returned) without resetting the
6120 qualify_single or search_parents options of the DNS resolver. These are
6121 inappropriate in this case because the targets of MX and SRV records must
6122 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6123 target that, when qualified, matched something in the local domain. These
6124 two options are now turned off when doing these lookups.
6126 57. It seems that at least some releases of Reiserfs (which does not have the
6127 concept of a fixed number of inodes) returns zero and not -1 for the
6128 number of available inodes. This interacted badly with check_spool_inodes,
6129 which assumed that -1 was the "no such thing" setting. What I have done is
6130 to check that the total number of inodes is greater than zero before doing
6131 the test of how many are available.
6133 58. When a "warn" ACL statement has a log_message modifier, the message is
6134 remembered, and not repeated. This is to avoid a lot of repetition when a
6135 message has many recipients that cause the same warning to be written.
6136 However, Exim was preserving the list of already written lines for an
6137 entire SMTP session, which doesn't seem right. The memory is now reset if a
6138 new message is started.
6140 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6141 debugging output unless log_rewrite was also set.
6143 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6144 of (int)(handle) when we know that handle contains (void *)(-1).
6146 61. The Exim daemon panic-logs an error return when it closes the incoming
6147 connection. However "connection reset by peer" seems to be common, and
6148 isn't really an error worthy of noting specially, so that particular error
6151 62. When Exim is trying to find all the local interfaces, it used to panic and
6152 die if the ioctl to get the interface flags failed. However, it seems that
6153 on at least one OS (Solaris 9) it is possible to have an interface that is
6154 included in the list of interfaces, but for which you get a failure error
6155 for this call. This happens when the interface is not "plumbed" into a
6156 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6157 failure of the "get flags" call assumes that the interface is down.
6159 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6160 makes life easier for people who are doing arithmetic on fields extracted
6161 from dates, where you often get leading zeros that should not be
6162 interpreted as octal.
6164 64. Added qualify_domain to the redirect router, to override the global
6167 65. If a pathologically long header line contained very many addresses (the
6168 report of this problem mentioned 10 000) and each of them was rewritten,
6169 Exim could use up a very large amount of memory. (It kept on making new
6170 copies of the header line as it rewrote, and never released the old ones.)
6171 At the expense of a bit more processing, the header rewriting function has
6172 been changed so that it no longer eats memory in this way.
6174 66. The generation of the Received: header has been moved from the time that a
6175 message starts to be received, to the time that it finishes. The timestamp
6176 in the Received: header should now be very close to that of the <= log
6177 line. There are two side-effects of this change:
6179 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6180 logged header lines no longer include the local Received: line, because
6181 it has not yet been created. The same applies to a copy of the message
6182 that is returned to a non-SMTP sender when a message is rejected.
6184 (b) When a filter file is tested using -bf, no additional Received: header
6185 is added to the test message. After some thought, I decided that this
6188 This change does not affect the value of $received_for. It is still set
6189 after address rewriting, but before local_scan() is called.
6191 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6193 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6194 gave an unhelpful panic error message, and a defer error. I have managed to
6195 change this behaviour so that it now rejects any supplied certificate,
6196 which seems right, as the list of acceptable certificates is empty.
6198 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6199 gave an unhelpful defer error. I have not managed to make this reject any
6200 supplied certificates, but the error message it gives is "no certificate
6201 supplied", which is not helpful.
6203 70. exigrep's output now also includes lines that are not associated with any
6204 message, but which match the given pattern. Implemented by a patch from
6205 Martin Sluka, which also tidied up the Perl a bit.
6207 71. Recipient callout verification, like sender verification, was using <> in
6208 the MAIL FROM command. This isn't really the right thing, since the actual
6209 sender may affect whether the remote host accepts the recipient or not. I
6210 have changed it to use the actual sender in the callout; this means that
6211 the cache record is now keyed on a recipient/sender pair, not just the
6212 recipient address. There doesn't seem to be a real danger of callout loops,
6213 since a callout by the remote host to check the sender would use <>.
6214 [SEE ABOVE: changed after hitting problems.]
6216 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6217 temporary errors. However, in the case of such a code being given after
6218 the end of a data transmission (i.e. after ".") Exim was failing to write
6219 a retry record for the message. (Yes, there was some broken host that was
6220 actually sending 8xx at this point.)
6222 73. An unknown lookup type in a host list could cause Exim to panic-die when
6223 the list was checked. (An example that provoked this was putting <; in the
6224 middle of a list instead of at the start.) If this happened during a DATA
6225 ACL check, a -D file could be left lying around. This kind of configuration
6226 error no longer causes Exim to die; instead it causes a defer error. The
6227 incident is still logged to the main and panic logs.
6229 74. Buglet left over from Exim 3 conversion. The message "too many messages
6230 in one connection" was written to the rejectlog but not the mainlog, except
6231 when address rewriting (yes!) was being logged.
6233 75. Added write_rejectlog option.
6235 76. When a system filter was run not as root (that is, when system_filter_user
6236 was set), the values of the $n variables were not being returned to the
6237 main process; thus, they were not subsequently available in the $sn
6240 77. Added +return_path_on_delivery log selector.
6242 78. A connection timeout was being treated differently from recipients deferred
6243 when testing hosts_max_try with a message that was older than the host's
6244 retry timeout. (The host should not be counted, thus allowing all hosts to
6245 be tried at least once before bouncing.) This may have been the cause of an
6246 occasionally reported bug whereby a message would remain on the queue
6247 longer than the retry timeout, but would be bounced if a delivery was
6248 forced. I say "may" because I never totally pinned down the problem;
6249 setting up timeout/retry tests is difficult. See also the next item.
6251 79. The ultimate address timeout was not being applied to errors that involved
6252 a combination of host plus message (for example, a timeout on a MAIL
6253 command). When an address resolved to a number of possible hosts, and they
6254 were not all tried for each delivery (e.g. because of hosts_max_try), a
6255 message could remain on the queue longer than the retry timeout.
6257 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6260 81. Fixed an obscure SMTP outgoing bug which required at least the following
6261 conditions: (a) there was another message waiting for the same server;
6262 (b) the server returned 5xx to all RCPT commands in the first message so
6263 that the message was not completed; (c) the server dropped the connection
6264 or gave a negative response to the RSET that Exim sends to abort the
6265 transaction. The observed case was a dropped connection after DATA that had
6266 been sent in pipelining mode. That is, the server had advertised PIPELINING
6267 but was not implementing it correctly. The effect of the bug was incorrect
6268 behaviour, such as trying another host, and this could lead to a crash.
6274 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6275 and daemon.c were passed as pointers to ints; they should have been
6276 pointers to socklen_t variables (which are typically unsigned ints).
6278 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6281 3. Fixed a really odd bug that affected only the testing scheme; patching a
6282 certain fixed string in the binary changed the value of another string that
6283 happened to be identical to the end of the original first string.
6285 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6286 name", it returns that address as the IP address. On some operating
6287 systems (e.g. Solaris), it also passes back the IP address string as the
6288 "host name". However, on others (e.g. Linux), it passes back an empty
6289 string. Exim wasn't checking for this, and was changing the host name to an
6290 empty string, assuming it had been canonicalized.
6292 5. Although rare, it is permitted to have more than one PTR record for a given
6293 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6294 all the names associated with an address, because they do in Solaris.
6295 However, it seems that they do not in Linux for data that comes from the
6296 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6297 I found this out when I moved to a new Linux workstation and tried to run
6298 the Exim test suite.
6300 To get round this problem I have changed the code so that it now does its
6301 own call to the DNS to look up PTR records when searching for a host name.
6302 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6303 addresses that are only in /etc/hosts are still found.
6305 This behaviour is, however, controlled by an option called host_lookup_
6306 order, which defaults to "bydns:byaddr". If people want to use the other
6307 order, or indeed, just use one or the other means of lookup, they can
6308 specify it in this variable.
6310 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6311 some operating systems, this comes back from gethostbyaddr() as an empty
6312 string, and this is what Exim used to test for. However, it seems that in
6313 other systems, "." is yielded. Exim now tests for this case too.
6315 7. The values of check_spool_space and check_log_space are now held internally
6316 as a number of kilobytes instead of an absolute number of bytes. If a
6317 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6318 kilobyte. This means that much larger values can be stored.
6320 8. Exim monitor: an attempt to get the action menu when not actually pointing
6321 at a message produces an empty menu entitled "No message selected". This
6322 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6323 no entries in it ("Shell widget menu has zero width and/or height"). So I
6324 have added a single, blank menu entry in this case.
6326 9. Added ${quote_local_part.
6328 10. MIME decoding is now applied to the contents of Subject: header lines when
6331 11. Now that a reference to $sender_host_address automatically causes a reverse
6332 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6333 host lookup before query-style lookups in lists that might use this
6334 variable. This has therefore been abolished, and the "net-" prefix is no
6335 longer necessary for query-style lookups.
6337 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6338 have been a typo for LFLAGS, so it has been changed.
6340 13. The install script calls Exim with "-C /dev/null" in order to find the
6341 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6342 to be output. However, since Exim outputs its version number before the
6343 error, it didn't break the script. It just looked ugly. I fixed this by
6344 always allowing "-C /dev/null" if the caller is root.
6346 14. Ignore overlarge ACL variable number when reading spool file - insurance
6347 against a later release with more variables having written the file.
6349 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6350 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6351 this, as well as the form without the "IPv6" on the front.
6353 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6354 OS/Makefile-Darwin file.
6356 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6357 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6359 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6360 variable. However, some OS use ints for inodes. I've added cast to long int
6361 to get rid of the compiler warning.
6363 19. I had forgotten to lock out "/../" in configuration file names when
6364 ALT_CONFIG_PREFIX was set.
6366 20. Routers used for verification do not need to specify transports. However,
6367 if such a router generated a host list, and callout was configured, Exim
6368 crashed, because it could not find a port number from the (non-existent)
6369 transport. It now assumes port 25 in this circumstance.
6371 21. Added the -t option to exigrep.
6373 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6374 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6375 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6376 them is set, LOOKUP_LSEARCH is forced.
6378 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6380 24. Added sender and host information to the "rejected by local_scan()" log
6381 line; previously there was no indication of these.
6383 25. Added .include_if_exists.
6385 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6386 Linux. It turns out that not all file systems support this. Apparently some
6387 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6388 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6389 not supported on the file descriptor, is now ignored when Exim is trying to
6390 sync a directory. This applies only to Linux.
6392 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6394 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6395 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6398 29. Added support for maildirsize files from supplied patch (modified a bit).
6400 30. The use of :fail: followed by an empty string could lead Exim to respond to
6401 sender verification failures with (e.g.):
6403 550 Verification failed for <xxx>
6404 550 Sender verify failed
6406 where the first response line was missing the '-' that indicates it is not
6407 the final line of the response.
6409 31. The loop for finding the name of the user that called Exim had a hardwired
6410 limit of 10; it now uses the value of finduser_retries, which is used for
6411 all other user lookups.
6413 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6416 33. Exim was neglecting to zero errno before one call of strtol() when
6417 expanding a string and expecting an integer value. On some systems this
6418 resulted in spurious "integer overflow" errors. Also, it was casting the
6419 result into an int without checking.
6421 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6422 did not work. The code looks as if it has *never* worked, though it appears
6423 to have been documented since at least release 1.62. I have made it work.
6425 35. The "timeout_DNS" error in retry rules, also documented since at least
6426 1.62, also never worked. As it isn't clear exactly what this means, and
6427 clearly it isn't a major issue, I have abolished the feature by treating it
6428 as "timeout", and writing a warning to the main and panic logs.
6430 36. The display of retry rules for -brt wasn't always showing the error code
6433 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6434 timeout_connect_A, timeout_connect_MX.
6436 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6437 to the empty sender.
6439 39. The daemon was not analysing the content of -oX till after it had closed
6440 stderr and disconnected from the controlling terminal. This meant that any
6441 syntax errors were only noted on the panic log, and the return code from
6442 the command was 0. By re-arranging the code a little, I've made the
6443 decoding happen first, so such errors now appear on stderr, and the return
6444 code is 1. However, the actual setting up of the sockets still happens in
6445 the disconnected process, so errors there are still only recorded on the
6448 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6449 connections (as happens on some IP stacks) was logged at start up time as
6450 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6451 it from "IPv6 and IPv4", which means that two separate sockets are being
6454 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6455 says whether AF_INET or AF_INET6 was passed as an argument.
6457 42. Exiwhat output was messed up when time zones were included in log
6460 43. Exiwhat now gives more information about the daemon's listening ports,
6461 and whether -tls-on-connect was used.
6463 44. The "port" option of the smtp transport is now expanded.
6465 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6466 silently ignored. Now an error message is written to the main and panic
6469 46. There's a new ACL modifier called "logwrite" which writes to a log file
6470 as soon as it is encountered.
6472 47. Added $local_user_uid and $local_user_gid at routing time.
6474 48. Exim crashed when trying to verify a sender address that was being
6477 49. Exim was recognizing only a space character after ".include". It now also
6478 recognizes a tab character.
6480 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6481 extracting the relevant information from the specification. The man page no
6482 longer contains scrambled data for the -d option, and I've added a section
6483 at the front about calling Exim under different names.
6485 51. Added "extra_headers" argument to the "mail" command in filter files.
6487 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6490 53. Installed eximstats 1.29.
6492 54. Added transport_filter_timeout as a generic transport option.
6494 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6495 Cc: header lines. This was required by RFC 822, but it not required by RFC
6498 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6499 incoming messages that did not have them. Now it does so only if the
6500 message originates locally, that is, if there is no associated remote host
6501 address. When Resent- header lines are present, this applies to the Resent-
6502 lines rather than the non-Resent- lines.
6504 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6505 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6507 58. Messages for configuration errors now include the name of the main
6508 configuration file - useful now that there may be more than one file in a
6509 list (.included file names were always shown).
6511 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6512 for those rare installations that do not start the daemon as root or run it
6513 setuid root. I've cut out the call to initgroups() if the daemon is not
6516 60. The Exim user and group can now be bound into the binary as text strings
6517 that are looked up at the start of Exim's processing.
6519 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6521 62. Added $mailstore_basename variable.
6523 63. Installed patch to sieve.c from Michael Haardt.
6525 64. When Exim failed to open the panic log after failing to open the main log,
6526 the original message it was trying to log was written to stderr and debug
6527 output, but if they were not available (the usual case in production), it
6528 was lost. Now it is written to syslog before the two lines that record the
6529 failures to open the logs.
6531 65. Users' Exim filters run in subprocesses under the user's uid. It is
6532 possible for a "deliver" command or an alias in a "personal" command to
6533 provoke an address rewrite. If logging of address rewriting is configured,
6534 this fails because the process is not running as root or exim. There may be
6535 a better way of dealing with this, but for the moment (because 4.30 needs
6536 to be released), I have disabled address rewrite logging when running a
6537 filter in a non-root, non-exim process.
6543 1. The buildconfig auxiliary program wasn't quoting the value set for
6544 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6545 not defined. This bug was masked in 4.22 by the effect that was fixed in
6548 2. Some messages that were rejected after a message id was allocated were
6549 shown as "incomplete" by exigrep. It no longer does this for messages that
6550 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6552 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6553 have allow_domain_literals set, the ID did not get logged in the <= line.
6554 Domain literals are now always recognized in Message-ID: header lines.
6556 4. The first argument for a ${extract expansion item is the key name or field
6557 number. Leading and trailing spaces in this item were not being ignored,
6558 causing some misleading effects.
6560 5. When deliver_drop_privilege was set, single queue runner processes started
6561 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6562 same command in the process it spins off) were not dropping privilege.
6564 6. When the daemon running as "exim" started a queue runner, it always
6565 re-executed Exim in the spun-off process. This is a waste of effort when
6566 deliver_drop_privilege is set. The new process now just calls the
6567 queue-runner function directly.
6573 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6576 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6577 ignored. Though the use of -oP was forcing the writing of a pid file, it
6578 was always written to the default place.
6580 3. If the message "no IP address found for host xxxx" is generated during
6581 incoming verification, it is now followed by identification of the incoming
6582 connection (so you can more easily find what provoked it).
6584 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6586 5. Added some features to "harden" Exim a bit more against certain attacks:
6588 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6589 be put in Local/Makefile. This is like the never_users runtime option,
6590 but it cannot be overridden. The default setting is "root".
6592 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6593 prefix string with which any file named in a -C command line option
6596 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6597 is retained for -C and -D only if the caller of Exim is root. Without
6598 it, the exim user may also use -C and -D and retain privilege.
6600 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6601 command line option is disabled.
6603 6. Macro names set by the -D option must start with an upper case letter, just
6604 like macro names defined in the configuration file.
6606 7. Added "dereference=" facility to LDAP.
6608 8. Two instances of the typo "uknown" in the source files are fixed.
6610 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6611 the Configure-Makefile script screwed up while processing it.
6613 10. Incorporated PCRE 4.4.
6615 11. The SMTP synchronization check was not operating right at the start of an
6616 SMTP session. For example, it could not catch a HELO sent before the client
6617 waited for the greeting. There is now a check for outstanding input at the
6618 point when the greeting is written. Because of the duplex, asynchronous
6619 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6620 way, but not yet received, when the check is performed.
6622 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6623 on TCP/IP sockets, because this apparently causes some broken clients to
6626 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6627 unchanged) from the Cygwin maintainer.
6629 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6630 was supported instead of testing for mbx. Effectively a typo.
6632 15. The spa authenticator server code was not checking that the input it
6633 received was valid base64.
6635 16. The debug output line for the "set" modifier in ACLs was not showing the
6636 name of the variable that was being set.
6638 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6640 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6641 lookup on its own. Something else was needed to trigger the lookup. For
6642 example, a match in host_lookup or the need for a host name in a host list.
6643 Now, if $sender_host_name is referenced and the host name has not yet been
6644 looked up, a lookup is performed. If the lookup fails, the variable remains
6645 empty, and $host_lookup_failed is set to "1".
6647 19. Added "eqi" as a case-independent comparison operator.
6649 20. The saslauthd authentication condition could segfault if neither service
6650 nor realm was specified.
6652 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6653 error message that was logged was misleading, and incoming SMTP
6654 connections were dropped. The message is now more accurate, and temporary
6655 errors are given to SMTP connections.
6657 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6658 (except RSET) with a 421 error, until QUIT is received. However, it was
6659 failing to send a response to QUIT.
6661 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6662 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6663 ACL is now run after the helo_try_verify_hosts code.
6665 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6666 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6667 case-independent, so other case variants are also recognized). Apparently
6668 some systems use these upper case variants.
6670 25. If more than two messages were waiting for the same host, and a transport
6671 filter was specified for the transport, Exim sent two messages over the
6672 same TCP/IP connection, and then failed with "socket operation on non-
6673 socket" when it tried to send the third.
6675 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6677 27. The extern definition of crypt16() in expand.c was not being excluded when
6678 the OS had its own crypt16() function.
6680 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6681 as a preferred synonym for return_size_limit, both as an option and as an
6684 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6686 30. Changed the default configuration ACL to relax the local part checking rule
6687 for addresses that are not in any local domains. For these addresses,
6688 slashes and pipe symbols are allowed within local parts, but the sequence
6689 /../ is explicitly forbidden.
6691 31. SPA server authentication was not clearing the challenge buffer before
6694 32. log_message in a "warn" ACL statement was writing to the reject log as
6695 well as to the main log, which contradicts the documentation and doesn't
6696 seem right (because no rejection is happening). So I have stopped it.
6698 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6699 However, I am unable to do any testing of this.
6701 34. Fixed an infelicity in the appendfile transport. When checking directories
6702 for a mailbox, to see if any needed to be created, it was accidentally
6703 using path names with one or more superfluous leading slashes; tracing
6704 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6706 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6707 contents are added to the log line that is written for every discarded
6708 recipient. (Previously a log_message setting was ignored.)
6710 36. The ${quote: operator now quotes the string if it is empty.
6712 37. The install script runs exim in order to find its version number. If for
6713 some reason other than non-existence or emptiness, which it checks, it
6714 could not run './exim', it was installing it with an empty version number,
6715 i.e. as "exim-". This error state is now caught, and the installation is
6718 38. An argument was missing from the function that creates an error message
6719 when Exim fails to connect to the socket for saslauthd authentication.
6720 This could cause Exim to crash, or give a corrupted message.
6722 39. Added isip, isip4, and isip6 to ${if conditions.
6724 40. The ACL variables $acl_xx are now saved with the message, and can be
6725 accessed later in routers, transports, and filters.
6727 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6728 strings in the file are not string-expanded.
6730 42. If a MAIL command specified a SIZE value that was too large to fit into an
6731 int variable, the check against message_size_limit failed. Such values are
6732 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6733 day this will have to be increased, but I don't think I want to be around
6734 when emails are that large.
6741 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6742 iconv() is not standard in FreeBSD.
6744 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6745 IPv6 enabled. The observed symptom was a segmentation fault on return from
6746 the function os_common_find_running_interfaces() in src/os.c.
6748 3. In the check_special_case() function in daemon.c I had used "errno" as an
6749 argument name, which causes warnings on some systems. This was basically a
6750 typo, since it was named "eno" in the comments!
6752 4. The code that waits for the clock to tick (at a resolution of some fraction
6753 of a second) so as to ensure message-id uniqueness was always waiting for
6754 at least one whole tick, when it could have waited for less. [This is
6755 almost certainly not relevant at current processor speeds, where it is
6756 unlikely to ever wait at all. But we try to future-proof.]
6758 5. The function that sleeps for a time interval that includes fractions of a
6759 second contained a race. It did not block SIGALRM between setting the
6760 timer, and suspending (a couple of lines later). If the interval was short
6761 and the sigsuspend() was delayed until after it had expired, the suspension
6762 never ended. On busy systems this could lead to processes getting stuck for
6765 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6766 process, before it forks any delivery processes. The open lookup caching
6767 mechanism meant that the open file or database connection was passed into
6768 the delivery process. The problem was that delivery processes always tidy
6769 up cached lookup data. This could cause a problem for the next delivery
6770 process started by the queue runner, because the external queue runner
6771 process does not know about the closure. So the next delivery process
6772 still has data in the lookup cache. In the case of a file lookup, there was
6773 no problem because closing a file descriptor in a subprocess doesn't affect
6774 the parent. However, if the lookup was caching a connection to a database,
6775 the connection was closed, and the second delivery process was likely to
6776 see errors such as "PGSQL: query failed: server closed the connection
6777 unexpectedly". The problem has been fixed by closing all cached lookups
6778 in a queue runner before running a delivery process.
6780 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6781 seem to have the "const" qualifier which it has on other OS. I've
6784 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6785 *of the same type* (client or server) with the same public name that an
6786 error should be diagnosed.
6788 9. When Exim looked up a host name for an IP address, but failed to find the
6789 original IP address when looking up the host name (a safety check), it
6790 output the message "<ip address> does not match any IP for NULL", which was
6791 confusing, to say the least. The bug was that the host name should have
6792 appeared instead of "NULL".
6794 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6795 user that is built into the binary, and the -C or -D options is used, root
6796 privilege is dropped before the configuration file is read. In addition,
6797 logging is switched to stderr instead of the normal log files. If the
6798 configuration then re-defines the Exim user, the unprivileged environment
6799 is probably not what is expected, so Exim logs a panic warning message (but
6802 However, if deliver_drop_privilege is set, the unprivileged state may well
6803 be exactly what is intended, so the warning has been cut out in that case,
6804 and Exim is allowed to try to write to its normal log files.
6810 1. smtp_return_error_details was not giving details for temporary sender
6811 or receiver verification errors.
6813 2. Diagnose a configuration error if two authenticators have the same public
6816 3. Exim used not to create the message log file for a message until the first
6817 delivery attempt. This could be confusing when incoming messages were held
6818 for policy or load reasons. The message log file is now created at the time
6819 the message is received, and an initial "Received" line is written to it.
6821 4. The automatically generated man page for command line options had a minor
6822 bug that caused no ill effects; however, a more serious problem was that
6823 the procedure for building the man page automatically didn't always
6824 operate. Consequently, release 4.20 contains an out-of-date version. This
6825 shouldn't happen again.
6827 5. When building Exim with embedded Perl support, the script that builds the
6828 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6829 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6831 6. The freeze_tell option was not being used for messages that were frozen on
6832 arrival, either by an ACL or by local_scan().
6834 7. Added the smtp_incomplete_transaction log selector.
6836 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6837 was accepting AUTH without a new EHLO.
6839 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6840 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6843 10. Logging of TCP/IP connections (when configured) now happens in the main
6844 daemon process instead of the child process, so that the TCP/IP connection
6845 count is more accurate (but it can never be perfect).
6847 11. The use of "drop" in a nested ACL was not being handled correctly in the
6848 outer ACL. Now, if condition failure induced by the nested "drop" causes
6849 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6850 or "require"), the connection is dropped.
6852 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6853 that yield "discard" can now be used with an "accept" or a "discard" verb,
6854 but an error is generated for any others (because I can't see a useful way
6855 to define what should happen).
6857 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6858 are now processed in the same way as lines in the Exim configuration file.
6859 In particular, continuation lines are supported.
6861 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6863 15. Added -ti meaning -t -i.
6865 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6866 domains, and warn by logging if others are found.
6868 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6869 returned from GIFCONF when Exim is trying to find the list of interfaces on
6870 a host. The code in os.c has been modified to copy each ifreq to an aligned
6871 structure in all cases.
6873 Also, in some cases, the returned ifreq's were being copied to a 'struct
6874 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6875 means the last couple of bytes of an IPv6 address could be chopped if the
6876 ifreq contained only a normal sockaddr (14 bytes storage).
6878 18. Named domain lists were not supported in the hosts_treat_as_local option.
6879 An entry such as +xxxx was not recognized, and was treated as a literal
6882 19. Ensure that header lines added by a DATA ACL are included in the reject log
6883 if the ACL subsequently rejects the message.
6885 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6886 MD5 (which is deprecated).
6888 21. When testing a filter file using -bf, Exim was writing a message when it
6889 took the sender from a "From " line in the message, but it was not doing so
6890 when it took $return_path from a Return-Path: header line. It now does.
6892 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6893 with a valid header line field name (a series of printing characters
6894 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6896 23. Changed "disc" in the source to "disk" to conform to the documentation and
6897 the book and for uniformity.
6899 24. Ignore Sendmail's -Ooption=value command line item.
6901 25. When execve() failed while trying to run a command in a pipe transport,
6902 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6903 could be confused with a return value of 69 from the command itself. This
6904 has been changed to 127, the value the shell returns if it is asked to run
6905 a non-existent command. The wording for the related log line suggests a
6906 non-existent command as the problem.
6908 26. If received_header_text expands to an empty string, do not add a Received:
6909 header line to the message. (Well, it adds a token one on the spool, but
6910 marks it "old" so that it doesn't get used or transmitted.)
6912 27. Installed eximstats 1.28 (addition of -nt option).
6914 28. There was no check for failure on the call to getsockname() in the daemon
6915 code. This can fail if there is a shortage of resources on the system, with
6916 ENOMEM, for example. A temporary error is now given on failure.
6918 29. Contrary to the C standard, it seems that in some environments, the
6919 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6920 program. Exim now does this explicitly; it affects the formatting of
6921 timestamps using strftime().
6923 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6924 complaints. I've now initialized all the variables, to avoid this.
6926 32. Header lines added by a system filter were not being "seen" during
6927 transport-time rewrites.
6929 33. The info_callback() function passed to OpenSSL is set up with type void
6930 (*)(SSL *, int, int), as described somewhere. However, when calling the
6931 function (actually a macro) that sets it up, the type void(*)() is
6932 expected. I've put in a cast to prevent warnings from picky compilers.
6934 34. If a DNS black list lookup found a CNAME record, but there were no A
6935 records associated with the domain it pointed at, Exim crashed.
6937 35. If a DNS black list lookup returned more than one A record, Exim ignored
6938 all but the first. It now scans all returned addresses if a particular IP
6939 value is being sought. In this situation, the contents of the
6940 $dnslist_value variable are a list of all the addresses, separated by a
6943 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6944 to accept a host name and all its aliases if the forward lookup for any of
6945 them yielded the IP address of the incoming connection. Now it accepts only
6946 those names whose forward lookup yields the correct IP address. Any other
6947 names are discarded. This closes a loophole whereby a rogue DNS
6948 administrator could create reverse DNS records to break through a
6949 wildcarded host restriction in an ACL.
6951 37. If a user filter or a system filter that ran in a subprocess used any of
6952 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6953 the wrong values were passed to the pipe command ($thisaddress had the
6954 value of $0, $0 had the value of $1, etc). This bug was introduced by
6955 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6957 38. Improved the line breaking for long SMTP error messages from ACLs.
6958 Previously, if there was no break point between 40 and 75 characters, Exim
6959 left the rest of the message alone. Two changes have been made: (a) I've
6960 reduced the minimum length to 35 characters; (b) if it can't find a break
6961 point between 35 and 75 characters, it looks ahead and uses the first one
6962 that it finds. This may give the occasional overlong line, but at least the
6963 remaining text gets split now.
6965 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6966 file descriptors might be low, and that setting 1000 would always raise it.
6967 It turns out that in some environments, the limit is already over 1000 and
6968 that lowering it causes trouble. So now Exim takes care not to decrease it.
6970 40. When delivering a message, the value of $return_path is set to $sender_
6971 address at the start of routing (routers may change the value). By an
6972 oversight, this default was not being set up when an address was tested by
6973 -bt or -bv, which affected the outcome if any router or filter referred to
6976 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6977 log only when "message" or "log_message" are set. However, if one of the
6978 conditions was an address verification, or a call to a nested ACL, the
6979 messages generated by the underlying test were being passed through. This
6980 no longer happens. The underlying message is available in $acl_verify_
6981 message for both "message" and "log_message" expansions, so it can be
6982 passed through if needed.
6984 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6985 new expansion $bh_ to give the encoded byte string without charset
6986 translation. Translation happens only if iconv() is available; HAVE_ICONV
6987 indicates this at build time. HEADERS_CHARSET gives the charset to
6988 translate to; headers_charset can change it in the configuration, and
6989 "headers charset" can change it in an individual filter file.
6991 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6992 that creates RFC 2047 encoded "words" labels them as that charset instead
6993 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6994 expansion operator; (ii) when Exim creates a From: line for a local
6995 message; (iii) when a header line is rewritten to include a "phrase" part.
6997 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6998 buggy, causing it to skip the first lines of messages whose message ID
6999 ended in 'D'. This would not have bitten before Exim release 4.14, because
7000 message IDs were unlikely to end in 'D' before then. The effect was to have
7001 incorrect size information for certain domains.
7003 45. #include "config.h" was missing at the start of the crypt16.c module. This
7004 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7007 46. If there was a timeout during a "random" callout check, Exim treated it as
7008 a failure of the random address, and carried on sending RSET and the real
7009 address. If the delay was just some slowness somewhere, the response to the
7010 original RCPT would be taken as a response to RSET and so on, causing
7011 mayhem of various kinds.
7013 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7014 when I implemented it. It didn't allow for the fact that some option values
7015 may legitimately be negative (e.g. size_addition), and it didn't even do
7016 the right test for positive values.
7018 48. Domain names in DNS records are case-independent. Exim always looks them up
7019 in lower case. Some resolvers return domain names in exactly the case they
7020 appear in the zone file, that is, they may contain uppercase letters. Not
7021 all resolvers do this - some return always lower case. Exim was treating a
7022 change of case by a resolver as a change of domain, similar to a widening
7023 of a domain abbreviation. This triggered its re-routing code and so it was
7024 trying to route what was effectively the same domain again. This normally
7025 caused routing to fail (because the router wouldn't handle the domain
7026 twice). Now Exim checks for this case specially, and just changes the
7027 casing of the domain that it ultimately uses when it transmits the message
7030 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7033 50. If a filter generated a file delivery with a non-absolute name (possible if
7034 no home directory exists for the router), the forbid_file option was not
7037 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7038 the existing equality matching.
7040 52. Exim was using ints instead of ino_t variables in some places where it was
7041 dealing with inode numbers.
7043 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7044 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7045 called TMPDIR, and if it finds it is different, it changes its value.
7047 54. The smtp_printf() function is now made available to local_scan() so
7048 additional output lines can be written before returning. There is also an
7049 smtp_fflush() function to enable the detection of a dropped connection.
7050 The variables smtp_input and smtp_batched_input are exported to
7053 55. Changed the default runtime configuration: the message "Unknown user"
7054 has been removed from the ACL, and instead placed on the localuser router,
7055 using the cannot_route_message feature. This means that any verification
7056 failures that generate their own messages won't get overridden. Similarly,
7057 the "Unrouteable address" message that was in the ACL for unverifiable
7058 relay addresses has also been removed.
7060 56. Added hosts_avoid_esmtp to the smtp transport.
7062 57. The exicyclog script was not checking for the esoteric option
7063 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7064 will work only if exicyclog is run under the appropriate euid.
7066 58. Following a discussion on the list, the rules by which Exim recognises line
7067 endings on incoming messages have been changed. The -dropcr and drop_cr
7068 options are now no-ops, retained only for backwards compatibility. The
7069 following line terminators are recognized: LF CRLF CR. However, special
7070 processing applies to CR:
7072 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7073 nor a local message in the state where . is a terminator.
7075 (ii) If a bare CR is encountered in a header line, an extra space is added
7076 after the line terminator so as not to end the header. The reasoning
7077 behind this is that bare CRs in header lines are most likely either
7078 to be mistakes, or people trying to play silly games.
7080 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7081 was being incorrectly given as 18 bytes larger than it should have been.
7082 This is a VOB (very old bug).
7084 60. This may never have affected anything current, but just in case it has:
7085 When the local host is found other than at the start of a list of hosts,
7086 the local host, those with the same MX, and any that follow, are discarded.
7087 When the list in question was part of a longer list of hosts, the following
7088 hosts (not currently being processed) were also being discarded. This no
7089 longer happens. I'm not sure if this situation could ever has previously
7092 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7095 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7096 header. This is something that is recommended in a new Internet Draft, and
7097 is something that is documented as being done by Sendmail. There are two
7098 possible values. For messages generated by the autoreply transport, Exim
7101 Auto-Submitted: auto-replied
7103 whereas for all other generated messages (e.g. bounces) it adds
7105 Auto-Submitted: auto-generated
7107 63. The "personal" condition in filters now includes a test for the
7108 Auto-Submitted: header. If it contains the string "auto-" the message it
7109 not considered personal.
7111 64. Added rcpt_include_affixes as a generic transport option.
7113 65. Added queue_only_override (default true).
7115 66. Added the syslog_duplication option.
7117 67. If what should have been the first header line of a message consisted of
7118 a space followed by a colon, Exim was mis-interpreting it as a header line.
7119 It isn't of course - it is syntactically invalid and should therefore be
7120 treated as the start of the message body. The misbehaviour could have
7121 caused a number of strange effects, including loss of data in subsequent
7122 header lines, and spool format errors.
7124 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7125 client host had authenticated. This control can now be exercised by an ACL
7126 for more flexibility.
7128 69. By default, callouts do not happen when testing with -bh. There is now a
7129 variant, -bhc, which does actually run the callout code, including
7130 consulting and updating the callout cache.
7132 70. Added support for saslauthd authentication, courtesy of Alexander
7135 71. If statvfs() failed on the spool or log directories while checking their
7136 size for availability, Exim confusingly gave the error "space shortage".
7137 Furthermore, in debugging mode it crashed with a floating point exception.
7138 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7139 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7140 serious problem, Exim now writes to the main and panic logs when this
7141 happens, with details of the failure. It then refuses to accept the
7142 incoming message, giving the message "spool directory problem" or "log
7143 directory problem" with a 421 code for SMTP messages.
7145 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7146 0, 1, and 2 exist, because some OS complain for execs without them (see
7147 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7148 descriptors. However, the code omitted to check that the open succeeded,
7149 causing mysterious errors if for some reason the permissions on /dev/null
7150 got screwed. Now Exim writes a message to the main and panic logs, and
7151 bombs out if it can't open /dev/null.
7153 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7154 interact so that it is all more flexible. It is supposed to remain
7155 backwards compatible. Also added extra_local_interfaces.
7157 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7158 to bomb out with an assertion failure - to the client this appears as a
7159 connection drop. This problem occurs in the part of the code that was taken
7160 from the Samba project. Fortunately, the assertion is in a very simple
7161 function, so I have fixed this by reproducing the function inline in the
7162 one place where it is called, and arranging for authentication to fail
7163 instead of killing the process with assert().
7165 75. The SPA client code was not working when the server requested OEM rather
7166 than Unicode encoding.
7168 76. Added code to make require_files with a specific uid setting more usable in
7169 the case where statting the file as root fails - usually a non-root-mounted
7170 NFS file system. When this happens and the failure is EACCES, Exim now
7171 forks a subprocess and does the per-uid checking as the relevant uid.
7173 77. Added process_log_path.
7175 78. If log_file_path was not explicitly set, a setting of check_log_space or
7176 check_log_inodes was ignored.
7178 79. If a space check for the spool or log partitions fails, the incident is now
7179 logged. Of course, in the latter case the data may get lost...
7181 80. Added the %p formatting code to string_format() so that it can be used to
7182 print addresses in debug_print(). Adjusted all the address printing in the
7183 debugging in store.c to use %p rather than %d.
7185 81. There was a concern that a line of code in smtp_in.c could overflow a
7186 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7187 initially expressed, the concern was not well-founded, because trailing
7188 spaces are removed early. However, if the trailing spaces were followed by
7189 a NULL, they did not get removed, so the overflow was possible. Two fixes
7192 (a) I re-wrote the offending code in a cleaner fashion.
7193 (b) If an incoming SMTP command contains a NULL character, it is rejected
7196 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7197 runs initgroups(), so that if the Exim user is in any additional groups,
7198 they will be used during message reception.
7204 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob