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 Rework error string handling in TLS interface so that the caller in
12 more cases is responsible for logging. This permits library-sourced
13 string to be attached to addresses during delivery, and collapses
14 pairs of long lines into single ones.
16 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
17 during configuration. Wildcards are allowed and expanded.
19 JH/02 Rework error string handling in DKIM to pass more info back to callers.
20 This permits better logging.
22 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
23 do not close it down and have the child transport start it up again on
24 the passed-on TCP connection. Instead, proxy the child (and any
25 subsequent ones) for TLS via a unix-domain socket channel. Logging is
26 affected: the continued delivery log lines do not have any DNSSEC, TLS
27 Certificate or OCSP information. TLS cipher information is still logged.
29 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
30 identical IP addresses on different listening ports. Will also affect
33 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
34 add noisy ifdef guards to special-case this sillyness.
35 Patch from Bernd Kuhls.
37 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
38 than 255 are no longer allowed.
40 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
41 Disable the session-cache too, which might reduce our load. Since we
42 currrectly use a new context for every connection, both as server and
43 client, there is no benefit for these.
44 GnuTLS appears to not support tickets server-side by default (we don't
45 call gnutls_session_ticket_enable_server()) but client side is enabled
46 by default on recent versions (3.1.3 +) unless the PFS priority string
49 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
50 <https://reproducible-builds.org/specs/source-date-epoch/>.
52 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
53 the check for any unsuccessful recipients did not notice the limit, and
54 erroneously found still-pending ones.
56 JH/08 Pipeline CHUNKING command and data together, on kernels that support
57 MSG_MORE. Only in-clear (not on TLS connections).
59 JH/09 Avoid using a temporary file during transport using dkim. Unless a
60 transport-filter is involved we can buffer the headers in memory for
61 creating the signature, and read the spool data file once for the
62 signature and again for transmission.
64 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
65 4.77 as the kernel support then wasn't solid, having issues in 64bit
66 mode. Now, it's been long enough. Add support for FreeBSD also.
68 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
69 case where the routing stage had gathered several addresses to send to
70 a host before calling the transport for the first, we previously failed
71 to close down TLS in the old transport process before passing the TCP
72 connection to the new process. The new one sent a STARTTLS command
73 which naturally failed, giving a failed delivery and bloating the retry
74 database. Investigation and fix prototype from Wolfgang Breyha.
76 JH/12 Fix check on SMTP command input synchronisation. Previously there were
77 false-negatives in the check that the sender had not preempted a response
78 or prompt from Exim (running as a server), due to that code's lack of
79 awareness of the SMTP input buffering.
81 PP/04 Add commandline_checks_require_admin option.
82 Exim drops privileges sanely, various checks such as -be aren't a
83 security problem, as long as you trust local users with access to their
84 own account. When invoked by services which pass untrusted data to
85 Exim, this might be an issue. Set this option in main configuration
86 AND make fixes to the calling application, such as using `--` to stop
89 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
90 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
91 responses to those, into a single TLS record each way (this usually means
92 a single packet). As a side issue, smtp_enforce_sync now works on TLS
95 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
96 affects you only if you're dancing at the edge of the param size limits.
97 If you are, and this message makes sense to you, then: raise the
98 configured limit or use OpenSSL 1.1. Nothing we can do for older
101 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
102 cmdline element to get the documented default one. Previously it was
105 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
106 are unsuable for non-message-specific reasons - eg. connection timeout,
107 banner-time rejection.
109 JH/16 Fix logging of delivery remote port, when specified by router, under
112 PP/06 Repair manualroute's ability to take options in any order, even if one
113 is the name of a transport.
116 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
118 JH/17 Change the list-building routines interface to use the expanding-string
119 triplet model, for better allocation and copying behaviour.
121 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
122 Previously it was constructed the first time a possibly-matching string
123 was met in the configuration file input during startup; now it is done
126 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
127 compatible one, to avoid the (poorly documented) possibility of a config
128 file in the working directory redirecting the DB files, possibly correpting
129 some existing file. CVE-2017-10140 assigned for BDB.
131 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
132 cache-hot. Previously, although the result was properly cached, the
133 initial verify call returned a defer.
135 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
136 the main verify for receipient in uncached-mode.
138 JH/22 Retire historical build files to an "unsupported" subdir. These are
139 defined as "ones for which we have no current evidence of testing".
141 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
142 if present. Previously it was ignored.
144 JH/24 Start using specified-initialisers in C structure init coding. This is
145 a C99 feature (it's 2017, so now considered safe).
147 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
148 if was a fixed-sized field and bitmask ops via macros; it is now more
151 PP/07 GitHub PR 56: Apply MariaDB build fix.
152 Patch provided by Jaroslav Škarvada.
158 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
159 than -2003 did; needs libidn2 in addition to libidn.
161 JH/02 The path option on a pipe transport is now expanded before use.
163 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
164 Patch provided by "Björn", documentation fix added too.
166 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
167 missing a wire-to-host endian conversion.
169 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
170 close after a BDAT command line could be taken as a following command,
171 giving a synch failure. Fix by only checking for synch immediately
172 before acknowledging the chunk.
174 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
175 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
176 macro. Patches provided by Josh Soref.
178 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
179 Previously we did not; the RFC seems ambiguous and VRFY is not listed
180 by IANA as a service extension. However, John Klensin suggests that we
183 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
184 the dkim code may be unix-mode line endings rather than smtp wire-format
185 CRLF, so prepend a CR to any bare LF.
187 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
188 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
190 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
191 the first were themselves being wrongly included in the feed into dkim
192 processing; with most chunk sizes in use this resulted in an incorrect
193 body hash calculated value.
195 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
196 DKIM signature block, for verification. Although advised against by
197 standards it is specifically not ruled illegal.
199 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
201 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
202 missing a body hash (the bh= tag).
204 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
205 It seems that HAProxy sends the Proxy Protocol information in clear and
206 only then does a TLS startup, so do the same.
208 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
209 TCP connections (such as for Spamd) unless the daemon successfully set
210 Fast Open mode on its listening sockets. This fixes breakage seen on
211 too-old kernels or those not configured for Fast Open, at the cost of
212 requiring both directions being enabled for TFO, and TFO never being used
213 by non-daemon-related Exim processes.
215 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
216 endings, at least on the first header line. Try to canonify any that get
217 past that check, despite the cost.
219 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
220 now limited to an arbitrary five deep, while parsing addresses with the
221 strip_excess_angle_brackets option enabled.
223 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
224 instead leave the unprompted TLS handshake in socket buffer for the
225 TLS library to consume.
227 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
229 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
231 JH/16 Drop variables when they go out of scope. Memory management drops a whole
232 region in one operation, for speed, and this leaves assigned pointers
233 dangling. Add checks run only under the testsuite which checks all
234 variables at a store-reset and panics on a dangling pointer; add code
235 explicitly nulling out all the variables discovered. Fixes one known
236 bug: a transport crash, where a dangling pointer for $sending_ip_address
237 originally assigned in a verify callout, is re-used.
239 PP/06 Drop '.' from @INC in various Perl scripts.
241 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
243 PP/08 Reduce a number of compilation warnings under clang; building with
244 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
245 should be warning-free.
247 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
249 HS/01 Fix portability problems introduced by PP/08 for platforms where
250 realloc(NULL) is not equivalent to malloc() [SunOS et al].
252 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
253 chunk. This allows us to accept broken chunked messages. We need a more
254 general solution here.
256 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
257 already-broken messages in the queue.
259 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
261 JH/19 Fix reference counting bug in routing-generated-address tracking.
267 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
268 supports it and a size is available (ie. the sending peer gave us one).
270 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
271 years of being deprecated). The replacements are the ACLs
272 acl_smtp_mime and acl_not_smtp_mime.
274 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
275 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
276 or even an in-clear connection were permitted. Now, if the host lookup
277 was dnssec and dane was requested then the host is only used if the
278 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
279 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
280 if one fails this test.
281 This means that a poorly-configured remote DNS will make it incommunicado;
282 but it protects against a DNS-interception attack on it.
284 JH/04 Bug 1810: make continued-use of an open smtp transport connection
285 non-noisy when a race steals the message being considered.
287 JH/05 If main configuration option tls_certificate is unset, generate a
288 self-signed certificate for inbound TLS connections.
290 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
291 in rewrites and routers.
293 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
294 and logged a warning sing 4.83; now they are a configuration file error.
296 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
297 (lacking @domain). Apply the same qualification processing as RCPT.
299 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
301 JH/10 Support ${sha256:} applied to a string (as well as the previous
304 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
305 a cutthrough deliver is pending, as we always want to make a connection.
306 This also avoids re-routing the message when later placing the cutthrough
307 connection after a verify cache hit.
308 Do not update it with the verify result either.
310 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
311 when routing results in more than one destination address.
313 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
314 signing (which inhibits the cutthrough capability). Previously only
315 the presence of an option was tested; now an expansion evaluating as
316 empty is permissible (obviously it should depend only on data available
317 when the cutthrough connection is made).
319 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
320 the relevant preceding SMTP command did not note the pipelining mode.
322 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
323 Previously they were not counted.
325 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
326 as one having no matching records. Previously we deferred the message
327 that needed the lookup.
329 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
330 distinguished as "(=".
332 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
333 for missing MX records. Previously it only worked for missing A records.
335 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
337 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
338 after the data-go-ahead and data-ack. Patch from Jason Betts.
340 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
341 even for a "none" policy. Patch from Tony Meyer.
343 JH/22 Fix continued use of a connection for further deliveries. If a port was
344 specified by a router, it must also match for the delivery to be
347 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
348 When one of the recipients of a message was unsuitable for the connection
349 (has no matching addresses), we lost track of needing to mark it
350 deferred. As a result mail would be lost.
352 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
354 JH/25 Decoding ACL controls is now done using a binary search; the source code
355 takes up less space and should be simpler to maintain. Merge the ACL
356 condition decode tables also, with similar effect.
358 JH/26 Fix problem with one_time used on a redirect router which returned the
359 parent address unchanged. A retry would see the parent address marked as
360 delivered, so not attempt the (identical) child. As a result mail would
363 JH/27 Fix a possible security hole, wherein a process operating with the Exim
364 UID can gain a root shell. Credit to http://www.halfdog.net/ for
365 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
368 JH/28 Enable {spool,log} filesystem space and inode checks as default.
369 Main config options check_{log,spool}_{inodes,space} are now
370 100 inodes, 10MB unless set otherwise in the configuration.
372 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
373 Previously it only applied to the main-section connection policy
376 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
378 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
379 by me. Added RFC7919 DH primes as an alternative.
381 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
382 are not in the system include path.
384 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
385 GnuTLS, when a session startup failed (eg because the client disconnected)
386 Exim did stdio operations after fclose. This was exposed by a recent
387 change which nulled out the file handle after the fclose.
389 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
390 signed directly by the cert-signing cert, rather than an intermediate
391 OCSP-signing cert. This is the model used by LetsEncrypt.
393 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
395 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
396 an incoming connection.
398 HS/02 Bug 1802: Do not half-close the connection after sending a request
401 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
402 fallback to "prime256v1".
404 JH/34 SECURITY: Use proper copy of DATA command in error message.
405 Could leak key material. Remotely exploitable. CVE-2016-9963.
411 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
412 and 3.4.4 - once the server is enabled to respond to an OCSP request
413 it does even when not requested, resulting in a stapling non-aware
414 client dropping the TLS connection.
416 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
417 support variable-length bit vectors. No functional change.
419 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
420 The I= interface field on outgoing lines is now after the H= remote
421 host field, same as incoming lines. There is a separate
422 outgoing_interface log selector which allows you to disable the
425 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
426 If not running log_selector +smtp_connection the mainlog would be held
427 open indefinitely after a "too many connections" event, including to a
428 deleted file after a log rotate. Leave the per net connection logging
429 leaving it open for efficiency as that will be quickly detected by the
430 check on the next write.
432 HS/01 Bug 1671: Fix post transport crash.
433 Processing the wait-<transport> messages could crash the delivery
434 process if the message IDs didn't exist for some reason. When
435 using 'split_spool_directory=yes' the construction of the spool
436 file name failed already, exposing the same netto behaviour.
438 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
439 mime_regex ACL conditions.
441 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
442 to DSN fail messages (bounces): remote IP, remote greeting, remote response
443 to HELO, local diagnostic string.
445 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
446 log line to debug. Even when configured with a tls authenticator many
447 client connections are expected to not authenticate in this way, so
448 an authenticate fail is not an error.
450 HS/02 Add the Exim version string to the process info. This way exiwhat
451 gives some more detail about the running daemon.
453 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
454 matter for fast-change records such as DNSBLs.
456 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
457 retry record, even if constant. There may be multiple transports with
458 different interface settings and the retry behaviour needs to be kept
461 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
463 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
465 JH/10 Bug 840: fix log_defer_output option of pipe transport
467 JH/11 Bug 830: use same host for all RCPTS of a message, even under
468 hosts_randomize. This matters a lot when combined with mua_wrapper.
470 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
471 ${quote_pgsql:<string>} operator.
473 JH/13 Bug 1708: avoid misaligned access in cached lookup.
475 JH/14 Change header file name for freeradius-client. Relevant if compiling
476 with Radius support; from the Gentoo tree and checked under Fedora.
478 JH/15 Bug 1712: Introduce $prdr_requested flag variable
480 JH/16 Bug 1714: Permit an empty string as expansion result for transport
481 option transport_filter, meaning no filtering.
483 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
485 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
486 defaults to "*" (all hosts). The variable is now available when not built
487 with TLS, default unset, mainly to enable keeping the testsuite sane.
488 If a server certificate is not supplied (via tls_certificate) an error is
489 logged, and clients will find TLS connections fail on startup. Presumably
490 they will retry in-clear.
491 Packagers of Exim are strongly encouraged to create a server certificate
492 at installation time.
494 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
495 with the $config_file variable.
497 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
498 in transport context, after the attempt, and per-recipient. The latter type
499 is per host attempted. The event data is the error message, and the errno
500 information encodes the lookup type (A vs. MX) used for the (first) host,
501 and the trailing two digits of the smtp 4xx response.
503 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
504 to write to mainlog (or rejectlog, paniclog) in the window between file
505 creation and permissions/ownership being changed. Particularly affects
506 installations where exicyclog is run as root, rather than exim user;
507 result is that the running daemon panics and dies.
509 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
511 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
512 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
513 "pri" and "weight". Note that the previous implicit priority given by the
514 list order is no longer honoured.
516 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
519 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
520 by defining SUPPORT_SOCKS.
522 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
523 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
524 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
525 variables are renamed to proxy_{local,external}_{address,port}.
527 JH/27 Move Internationalisation support from Experimental to mainline, enabled
528 for a build by defining SUPPORT_I18N
530 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
531 of the query string, and make ${quote_redis:} do that quoting.
533 JH/29 Move Events support from Experimental to mainline, enabled by default
534 and removable for a build by defining DISABLE_EVENT.
536 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
538 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
539 cached by the daemon.
541 JH/32 Move Redis support from Experimental to mainline, enabled for a build
542 by defining LOOKUP_REDIS. The libhiredis library is required.
544 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
545 keys are given for lookup.
547 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
548 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
549 only supported when built with TLS support. The PolarSSL SHA routines
550 are still used when the TLS library is too old for convenient support.
552 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
553 openssl_options), for security. OpenSSL forces this from version 1.1.0
554 server-side so match that on older versions.
556 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
557 allocation for $value could be released as the expansion processing
558 concluded, but leaving the global pointer active for it.
560 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
561 and to use the domains and local_parts ACL conditions.
563 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
564 incorrectly not doubled on cutthrough transmission, hence seen as a
565 body-termination at the receiving system - resulting in truncated mails.
566 Commonly the sender saw a TCP-level error, and retransmitted the message
567 via the normal store-and-forward channel. This could result in duplicates
568 received - but deduplicating mailstores were liable to retain only the
569 initial truncated version.
571 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
573 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
575 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
576 we're in there, support oversigning also; bug 1309.
578 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
580 HS/04 Add support for keep_environment and add_environment options.
582 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
583 either intentional arithmetic overflow during PRNG, or testing config-
586 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
587 delivery resulted in actual delivery. Cancel cutthrough before DATA
590 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
591 rejects a recipient: pass the reject to the originator.
593 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
594 Many were false-positives and ignorable, but it's worth fixing the
597 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
598 for the new environment-manipulation done at startup. Move the routines
599 from being local to tls.c to being global via the os.c file.
601 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
602 an extract embedded as result-arg for a map, the first arg for extract
603 is unavailable so we cannot tell if this is a numbered or keyed
604 extraction. Accept either.
610 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
613 JH/02 The smtp transport option "multi_domain" is now expanded.
615 JH/03 The smtp transport now requests PRDR by default, if the server offers
618 JH/04 Certificate name checking on server certificates, when exim is a client,
619 is now done by default. The transport option tls_verify_cert_hostnames
620 can be used to disable this per-host. The build option
621 EXPERIMENTAL_CERTNAMES is withdrawn.
623 JH/05 The value of the tls_verify_certificates smtp transport and main options
624 default to the word "system" to access the system default CA bundle.
625 For GnuTLS, only version 3.0.20 or later.
627 JH/06 Verification of the server certificate for a TLS connection is now tried
628 (but not required) by default. The verification status is now logged by
629 default, for both outbound TLS and client-certificate supplying inbound
632 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
635 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
636 Status Notification (bounce) messages are now MIME format per RFC 3464.
637 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
638 under the control of the dsn_advertise_hosts option, and routers may
639 have a dsn_lasthop option.
641 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
642 default, modifiable by a malware= option. The list separator for
643 the options can now be changed in the usual way. Bug 68.
645 JH/10 The smtp_receive_timeout main option is now expanded before use.
647 JH/11 The incoming_interface log option now also enables logging of the
648 local interface on delivery outgoing connections.
650 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
651 if the interface and destination host and port all match.
653 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
656 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
657 Patch from Andrew Lewis.
659 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
660 now supports optional time-restrictions, weighting, and priority
661 modifiers per server. Patch originally by <rommer@active.by>.
663 JH/16 The spamd_address main option now supports a mixed list of local
664 and remote servers. Remote servers can be IPv6 addresses, and
665 specify a port-range.
667 JH/17 Bug 68: The spamd_address main option now supports an optional
668 timeout value per server.
670 JH/18 Bug 1581: Router and transport options headers_add/remove can
671 now have the list separator specified.
673 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
676 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
679 JH/21 Support for the A6 type of dns record is withdrawn.
681 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
682 rather than the verbs used.
684 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
685 from 255 to 1024 chars.
687 JH/24 Verification callouts now attempt to use TLS by default.
689 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
690 are generic router options now. The defaults didn't change.
692 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
693 Original patch from Alexander Shikoff, worked over by JH.
695 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
696 files if ZCAT_COMMAND is not executable.
698 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
700 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
702 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
703 Normally benign, it bites when the pair was led to by a CNAME;
704 modern usage is to not canonicalize the domain to a CNAME target
705 (and we were inconsistent anyway for A-only vs AAAA+A).
707 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
709 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
710 when evaluating $sender_host_dnssec.
712 JH/31 Check the HELO verification lookup for DNSSEC, adding new
713 $sender_helo_dnssec variable.
715 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
717 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
719 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
721 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
722 documented as working, but never had. Support all but $spam_report.
724 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
725 added for tls authenticator.
727 HS/03 Add perl_taintmode main config option
733 TL/01 When running the test suite, the README says that variables such as
734 no_msglog_check are global and can be placed anywhere in a specific
735 test's script, however it was observed that placement needed to be near
736 the beginning for it to behave that way. Changed the runtest perl
737 script to read through the entire script once to detect and set these
738 variables, reset to the beginning of the script, and then run through
739 the script parsing/test process like normal.
741 TL/02 The BSD's have an arc4random API. One of the functions to induce
742 adding randomness was arc4random_stir(), but it has been removed in
743 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
744 function when detected.
746 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
747 cause callback expansion.
749 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
750 syntax errors in an expansion can be treated as a string instead of
751 logging or causing an error, due to the internal use of bool_lax
752 instead of bool when processing it.
754 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
755 server certificates when making smtp deliveries.
757 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
759 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
761 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
763 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
764 Merged patch from Sebastian Wiedenroth.
766 JH/05 Fix results-pipe from transport process. Several recipients, combined
767 with certificate use, exposed issues where response data items split
768 over buffer boundaries were not parsed properly. This eventually
769 resulted in duplicates being sent. This issue only became common enough
770 to notice due to the introduction of connection certificate information,
771 the item size being so much larger. Found and fixed by Wolfgang Breyha.
773 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
774 size buffer was used, resulting in syntax errors when an expansion
777 JH/07 Add support for directories of certificates when compiled with a GnuTLS
778 version 3.3.6 or later.
780 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
781 is EXPERIMENTAL_EVENT, the main-configuration and transport options
782 both become "event_action", the variables become $event_name, $event_data
783 and $event_defer_errno. There is a new variable $verify_mode, usable in
784 routers, transports and related events. The tls:cert event is now also
785 raised for inbound connections, if the main configuration event_action
788 TL/06 In test suite, disable OCSP for old versions of openssl which contained
789 early OCSP support, but no stapling (appears to be less than 1.0.0).
791 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
792 server certificate names available under the smtp transport option
793 "tls_verify_cert_hostname" now do not permit multi-component wildcard
796 JH/10 Time-related extraction expansions from certificates now use the main
797 option "timezone" setting for output formatting, and are consistent
798 between OpenSSL and GnuTLS compilations. Bug 1541.
800 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
801 encoded parameter in the incoming message. Bug 1558.
803 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
804 include certificate info, eximon was claiming there were spoolfile
807 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
809 JH/14 Log delivery-related information more consistently, using the sequence
810 "H=<name> [<ip>]" wherever possible.
812 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
813 are problematic for Debian distribution, omit them from the release
816 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
818 JH/16 Fix string representation of time values on 64bit time_t architectures.
821 JH/17 Fix a null-indirection in certextract expansions when a nondefault
822 output list separator was used.
827 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
828 checkers that were complaining about end of non-void function with no
831 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
832 This was a regression introduced in 4.83 by another bugfix.
834 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
836 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
837 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
843 TF/01 Correctly close the server side of TLS when forking for delivery.
845 When a message was received over SMTP with TLS, Exim failed to clear up
846 the incoming connection properly after forking off the child process to
847 deliver the message. In some situations the subsequent outgoing
848 delivery connection happened to have the same fd number as the incoming
849 connection previously had. Exim would try to use TLS and fail, logging
850 a "Bad file descriptor" error.
852 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
853 utilities have not been installed.
855 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
856 temporary space as the ACL may create new global variables.
858 TL/01 LDAP support uses per connection or global context settings, depending
859 upon the detected version of the libraries at build time.
861 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
862 to extract and use the src ip:port in logging and expansions as if it
863 were a direct connection from the outside internet. PPv2 support was
864 updated based on HAProxy spec change in May 2014.
866 JH/02 Add ${listextract {number}{list}{success}{fail}}.
868 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
869 Properly escape header and check for NULL return.
871 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
874 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
876 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
877 characters in header names, implemented as a verify condition.
878 Contributed by Michael Fischer v. Mollard.
880 TL/05 Rename SPF condition results err_perm and err_temp to standardized
881 results permerror and temperror. Previous values are deprecated but
882 still accepted. In a future release, err_perm and err_temp will be
883 completely removed, which will be a backward incompatibility if the
884 ACL tests for either of these two old results. Patch contributed by
885 user bes-internal on the mailing list.
887 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
889 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
890 selectors, in both main and reject logs.
892 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
895 JH/07 Add malware type "sock" for talking to simple daemon.
897 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
899 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
900 routers/transports under cutthrough routing.
902 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
903 numbers. Touch up "bool" conditional to keep the same definition.
905 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
907 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
909 JH/12 Expand items in router/transport headers_add or headers_remove lists
910 individually rather than the list as a whole. Bug 1452.
912 Required for reasonable handling of multiple headers_ options when
913 they may be empty; requires that headers_remove items with embedded
914 colons must have them doubled (or the list-separator changed).
916 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
917 view the policy declared in the DMARC record. Currently, $dmarc_status
918 is a combined value of both the record presence and the result of the
921 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
923 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
924 dnslookup router and the smtp transport (applying to the forward
927 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
928 of ldap servers used for a specific lookup. Patch provided by Heiko
931 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
932 New variable $lookup_dnssec_authenticated for observability.
934 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
935 Patch submitted by Lars Timman.
937 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
939 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
940 Requires trusted mode and valid format message id, aborts otherwise.
941 Patch contributed by Heiko Schlichting.
943 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
944 certextract with support for various fields. Bug 1358.
946 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
947 is requested by default, modifiable by smtp transport option
950 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
951 operate on certificate variables to give certificate fingerprints
952 Also new ${sha256:cert_variable}.
954 JH/23 The PRDR feature is moved from being Experimental into the mainline.
956 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
957 Christian Aistleitner.
959 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
961 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
962 file. Patch from Wolfgang Breyha.
964 JH/25 Expand the coverage of the delivery $host and $host_address to
965 client authenticators run in verify callout. Bug 1476.
967 JH/26 Port service names are now accepted for tls_on_connect_ports, to
968 align with daemon_smtp_ports. Bug 72.
970 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
971 support and error reporting did not work properly.
973 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
974 and is readable. Patch from Andrew Colin Kissa.
976 TL/14 Enhance documentation of ${run expansion and how it parses the
977 commandline after expansion, particularly in the case when an
978 unquoted variable expansion results in an empty value.
980 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
982 PP/02 Fix internal collision of T_APL on systems which support RFC3123
983 by renaming away from it. Addresses GH issue 15, reported by
986 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
988 TL/15 SECURITY: prevent double expansion in math comparison functions
989 (can expand unsanitized data). Not remotely exploitable.
996 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
998 PP/02 Make -n do something, by making it not do something.
999 When combined with -bP, the name of an option is not output.
1001 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1004 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1005 $sender_host_name and config options to manage this, and basic check
1008 PP/05 DSCP support for outbound connections and control modifier for inbound.
1010 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1011 (Only plugin which currently uses this is kerberos4, which nobody should
1012 be using, but we should make it available and other future plugins might
1013 conceivably use it, even though it would break NAT; stuff *should* be
1014 using channel bindings instead).
1016 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1017 name; added for Sendmail compatibility; requires admin caller.
1018 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1019 just ignore it); requires trusted caller.
1020 Also parse but ignore: -Ac -Am -X<logfile>
1023 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1025 TL/02 Add +smtp_confirmation as a default logging option.
1027 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1028 Patch by Magnus Holmgren from 2007-02-20.
1030 TL/04 Bugzilla 1281 - Spec typo.
1031 Bugzilla 1283 - Spec typo.
1032 Bugzilla 1290 - Spec grammar fixes.
1034 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1036 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1038 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1039 mailing list by by Dmitry Isaikin.
1041 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1043 JH/02 Support "G" suffix to numbers in ${if comparisons.
1045 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1047 NM/01 Bugzilla 1197 - Spec typo
1048 Bugzilla 1196 - Spec examples corrections
1050 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1052 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1053 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1056 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1057 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1059 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1060 "acl {{name}{arg}...}", and optional args on acl condition
1063 JH/05 Permit multiple router/transport headers_add/remove lines.
1065 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1067 JH/07 Avoid using a waiting database for a single-message-only transport.
1068 Performance patch from Paul Fisher. Bugzilla 1262.
1070 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1073 JH/09 Add $headers_added variable, with content from use of ACL modifier
1074 add_header (but not yet added to the message). Bugzilla 199.
1076 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1077 Pulled from Bugzilla 817 by Wolfgang Breyha.
1079 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1081 (nb: this is the same fix as in Exim 4.80.1)
1083 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1086 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1089 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1091 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1092 advertise SMTP AUTH mechanism to us, instead of a generic
1093 protocol violation error. Also, make Exim more robust to bad
1094 data from the Dovecot auth socket.
1096 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1098 When a queue runner is handling a message, Exim first routes the
1099 recipient addresses, during which it prunes them based on the retry
1100 hints database. After that it attempts to deliver the message to
1101 any remaining recipients. It then updates the hints database using
1104 So if a recipient address works intermittently, it can get repeatedly
1105 deferred at routing time. The retry hints record remains fresh so the
1106 address never reaches the final cutoff time.
1108 This is a fairly common occurrence when a user is bumping up against
1109 their storage quota. Exim had some logic in its local delivery code
1110 to deal with this. However it did not apply to per-recipient defers
1111 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1113 This change adds a proper retry rule check during routing so that the
1114 final cutoff time is checked against the message's age. We only do
1115 this check if there is an address retry record and there is not a
1116 domain retry record; this implies that previous attempts to handle
1117 the address had the retry_use_local_parts option turned on. We use
1118 this as an approximation for the destination being like a local
1119 delivery, as in LMTP.
1121 I suspect this new check makes the old local delivery cutoff check
1122 redundant, but I have not verified this so I left the code in place.
1124 TF/02 Correct gecos expansion when From: is a prefix of the username.
1126 Test 0254 submits a message to Exim with the header
1130 When I ran the test suite under the user fanf2, Exim expanded
1131 the header to contain my full name, whereas it should have added
1132 a Resent-Sender: header. It erroneously treats any prefix of the
1133 username as equal to the username.
1135 This change corrects that bug.
1137 GF/01 DCC debug and logging tidyup
1138 Error conditions log to paniclog rather than rejectlog.
1139 Debug lines prefixed by "DCC: " to remove any ambiguity.
1141 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1143 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1144 Bug spotted by Jeremy Harris; was flawed since initial commit.
1145 Would have resulted in OCSP responses post-SNI triggering an Exim
1146 NULL dereference and crash.
1148 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1150 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1151 Bug detection, analysis and fix by Samuel Thibault.
1152 Bugzilla 1331, Debian bug #698092.
1154 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1156 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1157 Server implementation by Todd Lyons, client by JH.
1158 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1159 config variable "prdr_enable" controls whether the server
1160 advertises the facility. If the client requests PRDR a new
1161 acl_data_smtp_prdr ACL is called once for each recipient, after
1162 the body content is received and before the acl_smtp_data ACL.
1163 The client is controlled by both of: a hosts_try_prdr option
1164 on the smtp transport, and the server advertisement.
1165 Default client logging of deliveries and rejections involving
1166 PRDR are flagged with the string "PRDR".
1168 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1169 fclose(). Diagnosis by Todd Lyons.
1171 PP/17 Update configure.default to handle IPv6 localhost better.
1172 Patch by Alain Williams (plus minor tweaks).
1175 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1176 This is now consistent with GnuTLS, and is now documented: the
1177 previous undocumented portable approach to treating the option as
1178 unset was to force an expansion failure. That still works, and
1179 an empty string is now equivalent.
1181 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1182 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1183 not performing validation itself.
1185 PP/20 Added force_command boolean option to pipe transport.
1186 Patch from Nick Koston, of cPanel Inc.
1188 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1191 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1193 PP/21 Fix eximon continuous updating with timestamped log-files.
1194 Broken in a format-string cleanup in 4.80, missed when I repaired the
1195 other false fix of the same issue.
1196 Report and fix from Heiko Schlichting.
1199 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1200 Report from Prashanth Katuri.
1202 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1203 It's SecureTransport, so affects any MacOS clients which use the
1204 system-integrated TLS libraries, including email clients.
1206 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1207 using a MIME ACL for non-SMTP local injection.
1208 Report and assistance in diagnosis by Warren Baker.
1210 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1212 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1214 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1215 last id that failed so it may be referenced in subsequent ACL's.
1217 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1220 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1221 ldap library initialization, allowing self-signed CA's to be
1222 used. Also properly sets require_cert option later in code by
1223 using NULL (global ldap config) instead of ldap handle (per
1224 session). Bug diagnosis and testing by alxgomz.
1226 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1227 the src/util/ subdirectory.
1229 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1230 renamed to Transport Post Delivery Action by Jeremy Harris, as
1233 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1234 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1235 redis_servers = needs to be configured which will be used by the redis
1236 lookup. Patch from Warren Baker, of The Packet Hub.
1238 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1240 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1241 hostname or reverse DNS when processing a host list. Used suggestions
1242 from multiple comments on this bug.
1244 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1246 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1247 Missed a few lines, added it to make the runtest require no keyboard
1250 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1251 contains upper case chars. Make router use caseful_local_part.
1253 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1254 support when GnuTLS has been built with p11-kit.
1260 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1262 This, or similar/improved, will also be change PP/11 of 4.82.
1268 PP/01 Handle short writes when writing local log-files.
1269 In practice, only affects FreeBSD (8 onwards).
1270 Bugzilla 1053, with thanks to Dmitry Isaikin.
1272 NM/01 Bugzilla 949 - Documentation tweak
1274 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1277 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1279 PP/02 Implemented gsasl authenticator.
1281 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1283 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1284 `pkg-config foo` for cflags/libs.
1286 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1287 with rest of GSASL and with heimdal_gssapi.
1289 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1290 `pkg-config foo` for cflags/libs for the TLS implementation.
1292 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1293 properties get this fed in as external SSF. A number of robustness
1294 and debugging improvements to the cyrus_sasl authenticator.
1296 PP/08 cyrus_sasl server now expands the server_realm option.
1298 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1299 Patch by Jeremy Harris.
1301 PP/10 Added dbmjz lookup type.
1303 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1305 PP/12 MAIL args handles TAB as well as SP, for better interop with
1306 non-compliant senders.
1307 Analysis and variant patch by Todd Lyons.
1309 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1310 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1311 Patch from Dirk Mueller <dmueller@suse.com>
1313 PP/13 tls_peerdn now print-escaped for spool files.
1314 Observed some $tls_peerdn in wild which contained \n, which resulted
1315 in spool file corruption.
1317 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1318 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1319 or write after TLS renegotiation, which otherwise led to messages
1322 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1323 as a tracking header (ie: a signed header comes before the signature).
1324 Patch from Wolfgang Breyha.
1326 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1327 comma-sep list; embedded commas doubled.
1329 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1331 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1333 Report and patch from Dmitry Banschikov.
1335 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1336 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1337 failures. We appear to now support TLS1.1+ with Exim.
1339 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1340 lets Exim select keys and certificates based upon TLS SNI from client.
1341 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1342 before an outbound SMTP session. New log_selector, +tls_sni.
1344 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1345 NULL dereference. Report and patch from Alun Jones.
1347 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1348 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1349 Not seeing resolver debug output on NetBSD, but suspect this is a
1350 resolver implementation change.
1352 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1353 Left warnings. Added "eximon gdb" invocation mode.
1355 PP/21 Defaulting "accept_8bitmime" to true, not false.
1357 PP/22 Added -bw for inetd wait mode support.
1359 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1360 locate the relevant includes and libraries. Made this the default.
1362 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1363 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1365 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1366 This may cause build issues on older platforms.
1368 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1369 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1370 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1371 Added SNI support via GnuTLS too.
1372 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1374 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1376 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1377 Applied second patch from Janne, implementing suggestion to default
1378 multiple-strings-in-record handling to match SPF spec.
1380 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1382 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1383 read-only, out of scope).
1384 Patch from Wolfgang Breyha, report from Stuart Northfield.
1386 PP/29 Fix three issues highlighted by clang analyser static analysis.
1387 Only crash-plausible issue would require the Cambridge-specific
1388 iplookup router and a misconfiguration.
1389 Report from Marcin Mirosław.
1391 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1393 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1394 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1395 As part of this, removing so much warning spew let me fix some minor
1396 real issues in debug logging.
1398 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1399 assignment on my part. Fixed.
1401 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1402 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1403 Janne Snabb (who went above and beyond: thank you).
1405 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1406 string otherwise requires a connection and a bunch more work and it's
1407 relatively easy to get wrong. Should also expose TLS library linkage
1410 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1411 64-bit ${eval} (JH/03).
1413 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1414 GNU libc to support some of the 64-bit stuff, should not lead to
1415 conflicts. Defined before os.h is pulled in, so if a given platform
1416 needs to override this, it can.
1418 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1419 protection layer was required, which is not implemented.
1420 Bugzilla 1254, patch from Wolfgang Breyha.
1422 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1423 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1424 tls_dhparam take prime identifiers. Also unbreak combination of
1425 OpenSSL+DH_params+TLSSNI.
1427 PP/39 Disable SSLv2 by default in OpenSSL support.
1433 PP/01 Solaris build fix for Oracle's LDAP libraries.
1434 Bugzilla 1109, patch from Stephen Usher.
1436 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1438 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1441 TF/02 Fix a couple more cases where we did not log the error message
1442 when unlink() failed. See also change 4.74-TF/03.
1444 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1445 lock up or crash if it happened to be inside a call to libc when it
1446 got a SIGUSR1 from exiwhat.
1448 The SIGUSR1 handler appends the current process status to the process
1449 log which is later printed by exiwhat. It used to use the general
1450 purpose logging code to do this, but several functions it calls are
1451 not safe for signals.
1453 The new output code in the SIGUSR1 handler is specific to the process
1454 log, and simple enough that it's easy to inspect for signal safety.
1455 Removing some special cases also simplifies the general logging code.
1456 Removing the spurious timestamps from the process log simplifies
1459 TF/04 Improved ratelimit ACL condition.
1461 The /noupdate option has been deprecated in favour of /readonly which
1462 has clearer semantics. The /leaky, /strict, and /readonly update modes
1463 are mutually exclusive. The update mode is no longer included in the
1464 database key; it just determines when the database is updated. (This
1465 means that when you upgrade Exim will forget old rate measurements.)
1467 Exim now checks that the per_* options are used with an update mode that
1468 makes sense for the current ACL. For example, when Exim is processing a
1469 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1470 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1471 must specify per_mail/readonly. If you omit the update mode it defaults to
1472 /leaky where that makes sense (as before) or /readonly where required.
1474 The /noupdate option is now undocumented but still supported for
1475 backwards compatibility. It is equivalent to /readonly except that in
1476 ACLs where /readonly is required you may specify /leaky/noupdate or
1477 /strict/noupdate which are treated the same as /readonly.
1479 A useful new feature is the /count= option. This is a generalization
1480 of the per_byte option, so that you can measure the throughput of other
1481 aggregate values. For example, the per_byte option is now equivalent
1482 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1484 The per_rcpt option has been generalized using the /count= mechanism
1485 (though it's more complicated than the per_byte equivalence). When it is
1486 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1487 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1488 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1489 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1490 Note that using per_rcpt with a non-readonly update mode in more than
1491 one ACL will cause the recipients to be double-counted. (The per_mail
1492 and per_byte options don't have this problem.)
1494 The handling of very low rates has changed slightly. If the computed rate
1495 is less than the event's count (usually one) then this event is the first
1496 after a long gap. In this case the rate is set to the same as this event's
1497 count, so that the first message of a spam run is counted properly.
1499 The major new feature is a mechanism for counting the rate of unique
1500 events. The new per_addr option counts the number of different
1501 recipients that someone has sent messages to in the last time period. It
1502 behaves like per_rcpt if all the recipient addresses are different, but
1503 duplicate recipient addresses do not increase the measured rate. Like
1504 the /count= option this is a general mechanism, so the per_addr option
1505 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1506 example, measure the rate that a client uses different sender addresses
1507 with the options per_mail/unique=$sender_address. There are further
1508 details in the main documentation.
1510 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1512 TF/06 Removed a few PCRE remnants.
1514 TF/07 Automatically extract Exim's version number from tags in the git
1515 repository when doing development or release builds.
1517 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1518 Bugzilla 879. Patch from Paul Fisher.
1520 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1521 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1524 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1526 PP/05 Variable $av_failed, true if the AV scanner deferred.
1527 Bugzilla 1078. Patch from John Horne.
1529 PP/06 Stop make process more reliably on build failure.
1530 Bugzilla 1087. Patch from Heiko Schlittermann.
1532 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1533 Bugzilla 1089. Patch from Heiko Schlittermann.
1535 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1536 Bugzilla 1131. Patch from Holger Weiß.
1538 PP/09 Handle IPv6 addresses with SPF.
1539 Bugzilla 860. Patch from Wolfgang Breyha.
1541 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1543 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1546 PP/11 match_* no longer expand right-hand-side by default.
1547 New compile-time build option, EXPAND_LISTMATCH_RHS.
1548 New expansion conditions, "inlist", "inlisti".
1550 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1552 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1554 PP/14 fix log_write() format string regression from TF/03.
1555 Bugzilla 1152. Patch from Dmitry Isaikin.
1561 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1563 PP/02 Harmonised TLS library version reporting; only show if debugging.
1564 Layout now matches that introduced for other libraries in 4.74 PP/03.
1566 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1568 PP/04 New "dns_use_edns0" global option.
1570 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1573 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1574 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1576 TK/01 Updated PolarSSL code to 0.14.2.
1577 Bugzilla 1097. Patch from Andreas Metzler.
1579 PP/07 Catch divide-by-zero in ${eval:...}.
1580 Fixes bugzilla 1102.
1582 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1585 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1586 format-string attack -- SECURITY: remote arbitrary code execution.
1588 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1589 time unintentionally subject to list matching rules, letting the header
1590 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1591 arbitrary string expansion). This allowed for information disclosure.
1593 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1594 INT_MIN/-1 -- value coerced to INT_MAX.
1600 NM/01 Workaround for PCRE version dependency in version reporting
1603 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1604 This fixes portability to compilers other than gcc, notably
1605 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1607 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1608 makefiles for portability to HP-UX and POSIX correctness.
1610 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1611 Also via indented variable definition in the Makefile.
1612 (Debugging by Oliver Heesakkers).
1614 PP/02 Restore caching of spamd results with expanded spamd_address.
1615 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1617 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1618 Improves build reliability. Fix from: Frank Elsner
1620 NM/02 Fix wide character breakage in the rfc2047 coding
1621 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1623 NM/03 Allow underscore in dnslist lookups
1624 Fixes bug 1026. Patch from Graeme Fowler
1626 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1627 Code patches from Adam Ciarcinski of NetBSD.
1629 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1632 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1633 is logged, to avoid truncation. Patch from John Horne.
1635 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1636 Patch from Jakob Hirsch.
1638 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1639 SQL string expansion failure details.
1640 Patch from Andrey Oktyabrski.
1642 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1643 Patch from Simon Arlott.
1645 PP/09 New lookups functionality failed to compile on old gcc which rejects
1646 extern declarations in function scope.
1647 Patch from Oliver Fleischmann
1649 PP/10 Use sig_atomic_t for flags set from signal handlers.
1650 Check getgroups() return and improve debugging.
1651 Fixed developed for diagnosis in bug 927 (which turned out to be
1654 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1655 Patch from Mark Zealey.
1657 PP/12 Bugzilla 1056: Improved spamd server selection.
1658 Patch from Mark Zealey.
1660 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1661 Based on patch from Heiko Schlittermann.
1663 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1664 Patch from Uwe Doering, sign-off by Michael Haardt.
1666 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1667 variable declaration deep within a block. Bug and patch from
1670 PP/15 lookups-Makefile IRIX compatibility coercion.
1672 PP/16 Make DISABLE_DKIM build knob functional.
1674 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1675 Patch by Simon Arlott
1677 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1678 variable argument macros. Our copy now differs from upstream.
1684 TF/01 Failure to get a lock on a hints database can have serious
1685 consequences so log it to the panic log.
1687 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1688 controlled using the smtp_confirmation log selector.
1690 TF/03 Include the error message when we fail to unlink a spool file.
1692 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1693 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1694 for maintaining out-of-tree patches for some time.
1696 PP/01 Bugzilla 139: Documentation and portability issues.
1697 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1698 Handle per-OS dynamic-module compilation flags.
1700 PP/02 Let /dev/null have normal permissions.
1701 The 4.73 fixes were a little too stringent and complained about the
1702 permissions on /dev/null. Exempt it from some checks.
1703 Reported by Andreas M. Kirchwitz.
1705 PP/03 Report version information for many libraries, including
1706 Exim version information for dynamically loaded libraries. Created
1707 version.h, now support a version extension string for distributors
1708 who patch heavily. Dynamic module ABI change.
1710 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1711 privilege escalation vulnerability whereby the Exim run-time user
1712 can cause root to append content of the attacker's choosing to
1715 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1718 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1719 If dropping privileges for untrusted macros, we disabled normal logging
1720 on the basis that it would fail; for the Exim run-time user, this is not
1721 the case, and it resulted in successful deliveries going unlogged.
1722 Fixed. Reported by Andreas Metzler.
1728 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1729 only prepend for the Resent-* case. Fixes regression introduced in
1730 Exim 4.70 by NM/22 for Bugzilla 607.
1732 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1733 increasing numbers of administrators be bitten by this.
1735 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1737 PP/03 Bugzilla 994: added openssl_options main configuration option.
1739 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1741 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1743 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1745 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1746 without a peer certificate, leading to a segfault because of an
1747 assumption that peers always have certificates. Be a little more
1748 paranoid. Problem reported by Martin Tscholak.
1750 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1751 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1752 NB: ClamAV planning to remove STREAM in "middle of 2010".
1753 CL also introduces -bmalware, various -d+acl logging additions and
1754 more caution in buffer sizes.
1756 PP/09 Implemented reverse_ip expansion operator.
1758 PP/10 Bugzilla 937: provide a "debug" ACL control.
1760 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1762 PP/12 Bugzilla 973: Implement --version.
1764 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1766 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1768 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1770 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1771 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1772 ignore trailing whitespace.
1774 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1776 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1779 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1780 Notification from Dr Andrew Aitchison.
1782 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1783 ExtendedDetectionInfo response format.
1784 Notification from John Horne.
1786 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1789 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1790 XSL and documented dependency on system catalogs, with examples of how
1793 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1796 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1797 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1798 configuration file which is writeable by the Exim user or group.
1800 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1801 of configuration files to cover files specified with the -C option if
1802 they are going to be used with root privileges, not just the default
1805 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1806 option (effectively making it always true).
1808 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1809 files to be used while preserving root privileges.
1811 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1812 that rogue child processes cannot use them.
1814 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1815 run-time user, instead of root.
1817 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1818 Exim run-time user without dropping privileges.
1820 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1821 result string, instead of calling string_vformat() twice with the same
1824 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1825 for other users. Others should always drop root privileges if they use
1826 -C on the command line, even for a whitelisted configure file.
1828 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1830 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1836 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1837 $data_path, and $header_path variables; fixed documentation bugs and
1840 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1841 exipick to access non-standard spools, including the "frozen" queue
1844 NM/01 Bugzilla 965: Support mysql stored procedures.
1845 Patch from Alain Williams
1847 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1849 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1850 Patch from Andreas Metzler
1852 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1853 Patch from Kirill Miazine
1855 NM/05 Bugzilla 671: Added umask to procmail example.
1857 JJ/03 installed exipick 20100323.0, fixing doc bug
1859 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1860 directory. Notification and patch from Dan Rosenberg.
1862 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1864 TK/02 Improve log output when DKIM signing operation fails.
1866 MH/01 Treat the transport option dkim_domain as a colon separated
1867 list, not as a single string, and sign the message with each element,
1868 omitting multiple occurences of the same signer.
1870 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1871 Bugzilla 985, 986. Patch by Simon Arlott
1873 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1874 Patch by Simon Arlott
1876 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1877 MBX locking. Notification from Dan Rosenberg.
1883 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1885 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1887 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1889 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1891 NM/04 Bugzilla 915: Flag broken perl installation during build.
1897 TK/01 Added patch by Johannes Berg that expands the main option
1898 "spamd_address" if it starts with a dollar sign.
1900 TK/02 Write list of recipients to X-Envelope-Sender header when building
1901 the mbox-format spool file for content scanning (suggested by Jakob
1904 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1905 (http://www.dcc-servers.net/) support via dccifd. Activated by
1906 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1908 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1909 by Mark Daniel Reidel <mr@df.eu>.
1911 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1912 When building exim an external PCRE library is now needed -
1913 PCRE is a system library on the majority of modern systems.
1914 See entry on PCRE_LIBS in EDITME file.
1916 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1917 conversation. Added nologin parameter to request.
1918 Patch contributed by Kirill Miazine.
1920 TF/01 Do not log submission mode rewrites if they do not change the address.
1922 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1924 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1925 log files in place. Contributed by Roberto Lima.
1927 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1929 TF/03 Bugzilla 615: When checking the local_parts router precondition
1930 after a local_part_suffix or local_part_prefix option, Exim now
1931 does not use the address's named list lookup cache, since this
1932 contains cached lookups for the whole local part.
1934 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1935 Robert Millan. Documentation is in experimental-spec.txt.
1937 TF/04 Bugzilla 668: Fix parallel build (make -j).
1939 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1941 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1942 Patch provided by Jan Srzednicki.
1944 TF/05 Leading white space used to be stripped from $spam_report which
1945 wrecked the formatting. Now it is preserved.
1947 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1948 that they are available at delivery time.
1950 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1952 TF/08 TLS error reporting now respects the incoming_interface and
1953 incoming_port log selectors.
1955 TF/09 Produce a more useful error message if an SMTP transport's hosts
1956 setting expands to an empty string.
1958 NM/06 Bugzilla 744: EXPN did not work under TLS.
1959 Patch provided by Phil Pennock.
1961 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1962 Patch provided by Richard Godbee.
1964 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1965 acl_smtp_notquit, added index entry.
1967 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1968 Patch provided by Eugene Bujak.
1970 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1971 accept(). Patch provided by Maxim Dounin.
1973 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1974 Patch provided by Phil Pennock.
1976 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1978 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1979 Patch provided by Brad "anomie" Jorsch.
1981 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1982 Patch provided by Dean Brooks.
1984 TK/05 Add native DKIM support (does not depend on external libraries).
1986 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1987 Patch provided by Graeme Fowler.
1989 NM/16 Bugzilla 851: Documentation example syntax fix.
1991 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1993 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1996 NM/19 Bugzilla 745: TLS version reporting.
1997 Patch provided by Phil Pennock.
1999 NM/20 Bugzilla 167: bool: condition support.
2000 Patch provided by Phil Pennock.
2002 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2003 clients. Patch provided by Phil Pennock.
2005 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2006 Patch provided by Brad "anomie" Jorsch.
2008 NM/23 Bugzilla 687: Fix misparses in eximstats.
2009 Patch provided by Heiko Schlittermann.
2011 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2012 Patch provided by Heiko Schlittermann.
2014 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2015 plus update to original patch.
2017 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2019 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2020 Patch provided by David Brownlee.
2022 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2024 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2026 NM/30 Bugzilla 888: TLS documentation bugfixes.
2028 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2030 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2031 Unlike the original bugzilla I have changed all shell scripts in src tree.
2033 NM/33 Bugzilla 898: Transport filter timeout fix.
2034 Patch by Todd Rinaldo.
2036 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2037 Patch by Serge Demonchaux.
2039 NM/35 Bugzilla 39: Base64 decode bug fixes.
2040 Patch by Jakob Hirsch.
2042 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2044 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2046 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2048 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2054 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2055 ALT-N's libdkim that I have put here:
2056 http://duncanthrax.net/exim-experimental/
2058 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2059 were called 'true' and it seems that C99 defines that as a reserved
2060 keyword to be used with 'bool' variable types. That means you could
2061 not include C99-style headers which use bools without triggering
2062 build errors in sieve.c.
2064 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2065 as mailq or other aliases. Changed the --help handling significantly
2066 to do whats expected. exim_usage() emits usage/help information.
2068 SC/01 Added the -bylocaldomain option to eximstats.
2070 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2072 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2074 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2080 PH/01 Another patch from the Sieve maintainer.
2082 PH/02 When an IPv6 address is converted to a string for single-key lookup
2083 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2084 dots are used instead of colons so that keys in lsearch files need not
2085 contain colons. This was done some time before quoting was made available
2086 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2087 (notated using the quote facility) so as to distinguish them from IPv4
2088 keys. This meant that lookups for IP addresses in host lists did not work
2089 for iplsearch lookups.
2091 This has been fixed by arranging for IPv6 addresses to be expressed with
2092 colons if the lookup type is iplsearch. This is not incompatible, because
2093 previously such lookups could never work.
2095 The situation is now rather anomalous, since one *can* have colons in
2096 ordinary lsearch keys. However, making the change in all cases is
2097 incompatible and would probably break a number of configurations.
2099 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2102 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2103 conversion specification without a maximum field width, thereby enabling
2104 a rogue spamd server to cause a buffer overflow. While nobody in their
2105 right mind would setup Exim to query an untrusted spamd server, an
2106 attacker that gains access to a server running spamd could potentially
2107 exploit this vulnerability to run arbitrary code as the Exim user.
2109 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2110 $primary_hostname instead of what libspf2 thinks the hosts name is.
2112 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2113 a directory entry by the name of the lookup key. Previously, if a
2114 symlink pointed to a non-existing file or a file in a directory that
2115 Exim lacked permissions to read, a lookup for a key matching that
2116 symlink would fail. Now it is enough that a matching directory entry
2117 exists, symlink or not. (Bugzilla 503.)
2119 PH/03 The body_linecount and body_zerocount variables are now exported in the
2122 PH/04 Added the $dnslist_matched variable.
2124 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2125 This means they are set thereafter only if the connection becomes
2128 PH/06 Added the client_condition to authenticators so that some can be skipped
2129 by clients under certain conditions.
2131 PH/07 The error message for a badly-placed control=no_multiline_responses left
2132 "_responses" off the end of the name.
2134 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2136 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2137 (without spaces) instead of just copying the configuration text.
2139 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2141 PH/11 Added $max_received_linelength.
2143 PH/12 Added +ignore_defer and +include_defer to host lists.
2145 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2146 way in which PCRE > 7.0 is built.
2148 PH/14 Implemented queue_only_load_latch.
2150 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2151 MAIL command. The effect was to mangle the value on 64-bit systems.
2153 PH/16 Another patch from the Sieve maintainer.
2155 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2157 PH/18 If a system quota error occurred while trying to create the file for
2158 a maildir delivery, the message "Mailbox is full" was not appended to the
2159 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2160 only to a quota excession during the actual writing of the file.
2162 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2163 characters?) which causes problems in log lines. The DN values are now
2164 passed through string_printing() before being added to log lines.
2166 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2167 and InterBase are left for another time.)
2169 PH/21 Added message_body_newlines option.
2171 PH/22 Guard against possible overflow in moan_check_errorcopy().
2173 PH/23 POSIX allows open() to be a macro; guard against that.
2175 PH/24 If the recipient of an error message contained an @ in the local part
2176 (suitably quoted, of course), incorrect values were put in $domain and
2177 $local_part during the evaluation of errors_copy.
2183 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2184 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2187 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2188 issue a MAIL command.
2190 PH/02 In an ACL statement such as
2192 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2194 if a client was not listed at all, or was listed with a value other than
2195 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2196 the condition was not true (as it should be), so access was not denied.
2197 The bug was that the ! inversion was incorrectly passed on to the second
2198 item. This has been fixed.
2200 PH/03 Added additional dnslists conditions == and =& which are different from
2201 = and & when the dns lookup returns more than one IP address.
2203 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2204 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2206 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2207 FSYNC, which compiles an option called disable_fsync that allows for
2208 bypassing fsync(). The documentation is heavily laced with warnings.
2210 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2212 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2213 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2214 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2215 including adding "make clean"; (3) Added -fPIC when compiling the test
2216 dynamically loaded module, to get rid of a warning.
2218 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2219 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2220 = 0s. The bug is otherwise harmless.
2222 PH/07 There was a bug in the dovecot authenticator such that the value of
2223 $auth1 could be overwritten, and so not correctly preserved, after a
2224 successful authentication. This usually meant that the value preserved by
2225 the server_setid option was incorrect.
2227 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2229 PH/09 Installed PCRE release 7.0.
2231 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2232 run for batched SMTP input. It is now run at the start of every message
2233 in the batch. While fixing this I discovered that the process information
2234 (output by running exiwhat) was not always getting set for -bs and -bS
2235 input. This is fixed, and it now also says "batched" for BSMTP.
2237 PH/11 Added control=no_pipelining.
2239 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2240 patch, slightly modified), and move the expansion of helo_data till after
2241 the connection is made in the smtp transport (so it can use these
2244 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2246 PH/14 Added log_selector = +pid.
2248 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2250 PH/16 Add ${if forany and ${if forall.
2252 PH/17 Added dsn_from option to vary the From: line in DSNs.
2254 PH/18 Flush SMTP output before performing a callout, unless control =
2255 no_callout_flush is set.
2257 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2258 was true (the default) a successful delivery failed to delete the retry
2259 item, thus causing premature timeout of the address. The bug is now
2262 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2264 PH/21 Long custom messages for fakedefer and fakereject are now split up
2265 into multiline responses in the same way that messages for "deny" and
2266 other ACL rejections are.
2268 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2269 with slight modification.
2271 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2272 draft, changing the syntax and factoring some duplicate code".
2274 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2275 for deliveries of the second and subsequent messages over the same SMTP
2278 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2279 ${reduce, with only minor "tidies".
2281 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2283 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2284 expansion side effects.
2286 PH/27 When a message times out after an over-quota error from an Exim-imposed
2287 quota, the bounce message says "mailbox is full". This message was not
2288 being given when it was a system quota that was exceeded. It now should
2291 MH/03 Made $recipients available in local_scan(). local_scan() already has
2292 better access to the recipient list through recipients_list[], but
2293 $recipients can be useful in postmaster-provided expansion strings.
2295 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2296 in the case of a MAIL command with additional options following the
2297 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2298 were accidentally chopped off.
2300 PH/29 SMTP synchronization checks are implemented when a command is read -
2301 there is a check that no more input is waiting when there shouldn't be
2302 any. However, for some commands, a delay in an ACL can mean that it is
2303 some time before the response is written. In this time, more input might
2304 arrive, invalidly. So now there are extra checks after an ACL has run for
2305 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2306 pipelining has not been advertised.
2308 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2310 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2311 returned in the SMTP response when smtp_return_error_details was false.
2312 This has been fixed.
2314 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2315 instead of the C I/O that was originally supplied, because problems were
2316 reported on Solaris.
2318 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2319 Exim which did not show up earlier: it was assuming that a call to
2320 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2321 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2322 was a macro that became an assignment, so it seemed to work. This has
2323 changed to a proper function call with a void return, hence the compile
2324 error. Exim's code has been fixed.
2326 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2329 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2331 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2333 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2334 because it turns out to be too big or there is a timeout) there is no
2335 "Completed" line in the log. When some messages of this type were
2336 selected by exigrep, they were listed as "not completed". Others were
2337 picked up by some special patterns. I have improved the selection
2338 criteria to be more general.
2340 PH/38 The host_find_failed option in the manualroute router can now be set
2341 to "ignore", to completely ignore a host whose IP address cannot be
2342 found. If all hosts are ignored, the behaviour is controlled by the new
2343 host_all_ignored option.
2345 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2346 homing or because of multiple MX records with /mx) generated more than
2347 one IP address, and the following item turned out to be the local host,
2348 all the secondary addresses of the first item were incorrectly removed
2349 from the list, along with the local host and any following hosts (which
2350 is what is supposed to happen).
2352 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2353 whoever called Exim into the -H file. In the case of the daemon it was
2354 behaving confusingly. When first started, it used values for whoever
2355 started the daemon, but after a SIGHUP it used the Exim user (because it
2356 calls itself on a restart). I have changed the code so that it now always
2359 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2360 message are rejected with the same error (e.g. no authentication or bad
2361 sender address), and a DATA command is nevertheless sent (as can happen
2362 with PIPELINING or a stupid MUA), the error message that was given to the
2363 RCPT commands is included in the rejection of the DATA command. This is
2364 intended to be helpful for MUAs that show only the final error to their
2367 PH/42 Another patch from the Sieve maintainer.
2369 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2370 Eximstats - Fixed some broken HTML links and added missing column headers
2372 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2373 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2375 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2377 PH/43 Yet another patch from the Sieve maintainer.
2379 PH/44 I found a way to check for a TCP/IP connection going away before sending
2380 the response to the final '.' that terminates a message, but only in the
2381 case where the client has not sent further data following the '.'
2382 (unfortunately, this is allowed). However, in many cases there won't be
2383 any further data because there won't be any more messages to send. A call
2384 to select() can be used: if it shows that the input is "ready", there is
2385 either input waiting, or the socket has been closed. An attempt to read
2386 the next input character can distinguish the two cases. Previously, Exim
2387 would have sent an OK response which the client would never have see.
2388 This could lead to message repetition. This fix should cure that, at
2389 least in a lot of common cases.
2391 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2392 advertised in response to EHLO.
2398 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2399 fixed by 4.65/MH/01 (is this a record?) are fixed:
2401 (i) An empty string was always treated as zero by the numeric comparison
2402 operators. This behaviour has been restored.
2404 (ii) It is documented that the numeric comparison operators always treat
2405 their arguments as decimal numbers. This was broken in that numbers
2406 starting with 0 were being interpreted as octal.
2408 While fixing these problems I realized that there was another issue that
2409 hadn't been noticed. Values of message_size_limit (both the global option
2410 and the transport option) were treated as octal if they started with 0.
2411 The documentation was vague. These values are now always treated as
2412 decimal, and I will make that clear in the documentation.
2418 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2419 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2422 MH/01 Don't check that the operands of numeric comparison operators are
2423 integers when their expansion is in "skipping" mode (fixes bug
2424 introduced by 4.64-PH/07).
2426 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2427 child addresses, Exim now panics and dies. Previously, because the count
2428 is held in a short int, deliveries were likely to be lost. As such a
2429 large number of recipients for a single message is ridiculous
2430 (performance will be very, very poor), I have chosen to impose a limit
2431 rather than extend the field.
2437 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2438 leftover -K file (the existence of which was triggered by #402).
2439 While we were at it, introduced process PID as part of the -K
2440 filename. This should rule out race conditions when creating
2443 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2444 processing considerably. Previous code took too long for large mails,
2445 triggering a timeout which in turn triggers #401.
2447 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2448 in the DK code in transports.c. sendfile() is not really portable,
2449 hence the _LINUX specificness.
2451 TF/01 In the add_headers option to the mail command in an Exim filter,
2452 there was a bug that Exim would claim a syntax error in any
2453 header after the first one which had an odd number of characters
2456 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2457 callout verification, Exim cached a "reject" for the entire domain. This
2458 is correct for most verifications, but it is not correct for a recipient
2459 verification with use_sender or use_postmaster set, because in that case
2460 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2461 case of MAIL FROM:<> rejection from other early rejections (e.g.
2462 rejection of HELO). When verifying a recipient using a non-null MAIL
2463 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2464 Whatever the result of the callout, the value of the domain cache is
2465 left unchanged (for any other kind of callout, getting as far as trying
2466 RCPT means that the domain itself is ok).
2468 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2471 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2472 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2473 session, the daemon ignores ECONNECT errors and logs others; it now
2474 ignores EPIPE as well.
2476 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2477 (quoted-printable decoding).
2479 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2480 later the small subsequent patch to fix an introduced bug.
2482 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2484 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2486 PH/08 An error is now given if message_size_limit is specified negative.
2488 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2489 to be given (somewhat) arbitrary names.
2491 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2494 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2495 miscellaneous code fixes
2497 PH/10 Added the log_reject_target ACL modifier to specify where to log
2500 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2501 hostname. This is wrong, because it relates to the incoming message (and
2502 probably the interface on which it is arriving) and not to the outgoing
2503 callout (which could be using a different interface). This has been
2504 changed to use the value of the helo_data option from the smtp transport
2505 instead - this is what is used when a message is actually being sent. If
2506 there is no remote transport (possible with a router that sets up host
2507 addresses), $smtp_active_hostname is used.
2509 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2510 tweaks were necessary in order to get it to work (see also 21 below):
2511 (a) The code assumed that strncpy() returns a negative number on buffer
2512 overflow, which isn't the case. Replaced with Exim's string_format()
2514 (b) There were several signed/unsigned issues. I just did the minimum
2515 hacking in of casts. There is scope for a larger refactoring.
2516 (c) The code used strcasecmp() which is not a standard C function.
2517 Replaced with Exim's strcmpic() function.
2518 (d) The code set only $1; it now sets $auth1 as well.
2519 (e) A simple test gave the error "authentication client didn't specify
2520 service in request". It would seem that Dovecot has changed its
2521 interface. Fortunately there's a specification; I followed it and
2522 changed what the client sends and it appears to be working now.
2524 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2527 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2528 address A is aliased to B and C, where B exists and C does not. Without
2529 -v the output is "A verified" because verification stops after a
2530 successful redirection if more than one address is generated. However,
2531 with -v the child addresses are also verified. Exim was outputting "A
2532 failed to verify" and then showing the successful verification for C,
2533 with its parentage. It now outputs "B failed to verify", showing B's
2534 parentage before showing the successful verification of C.
2536 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2537 look up a TXT record in a specific list after matching in a combined
2540 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2541 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2542 they consult the DNS. I had assumed they would set it the way they
2543 wanted; and indeed my experiments on Linux seem to show that in some
2544 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2545 To be on the safe side, however, I have now made the interface to
2546 host_find_byname() similar to host_find_bydns(), with an argument
2547 containing the DNS resolver options. The host_find_byname() function now
2548 sets these options at its start, just as host_find_bydns() does. The smtp
2549 transport options dns_qualify_single and dns_search_parents are passed to
2550 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2551 of host_find_byname() use the default settings of RES_DEFNAMES
2552 (qualify_single) but not RES_DNSRCH (search_parents).
2554 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2555 spool_read_header() do less string testing, by means of a preliminary
2556 switch on the second character of optional "-foo" lines. (This is
2557 overdue, caused by the large number of possibilities that now exist.
2558 Originally there were few.) While I was there, I also converted the
2559 str(n)cmp tests so they don't re-test the leading "-" and the first
2560 character, in the hope this might squeeze out yet more improvement.
2562 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2563 flag allowing group syntax was set by the header_syntax check but not
2564 turned off, possible causing trouble later; (2) The flag was not being
2565 set at all for the header_verify test, causing "group"-style headers to
2566 be rejected. I have now set it in this case, and also caused header_
2567 verify to ignore an empty address taken from a group. While doing this, I
2568 came across some other cases where the code for allowing group syntax
2569 while scanning a header line wasn't quite right (mostly, not resetting
2570 the flag correctly in the right place). These bugs could have caused
2571 trouble for malformed header lines. I hope it is now all correct.
2573 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2574 with the "reply" argument non-NULL. The code, however (which originally
2575 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2576 but it didn't always do it. This confused somebody who was copying the
2577 code for some other use. I have removed all the tests.
2579 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2580 feature that was used to support insecure browsers during the U.S. crypto
2581 embargo. It requires special client support, and Exim is probably the
2582 only MTA that supported it -- and would never use it because real RSA is
2583 always available. This code has been removed, because it had the bad
2584 effect of slowing Exim down by computing (never used) parameters for the
2585 RSA_EXPORT functionality.
2587 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2588 authenticator to fail if there's a tab character in the incoming data
2589 (there should never be unless someone is messing about, as it's supposed
2590 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2591 if the connection is using TLS or if the remote IP is the same as the
2592 local IP, and the "valid-client-cert option" if a client certificate has
2595 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2596 authenticators. This can be used for authorization after authentication
2597 succeeds. (In the case of plaintext, it servers for both authentication
2600 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2601 if any retry times were supplied.
2603 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2604 connection, where there is no client IP address to check. In this
2605 situation, the verify now always succeeds.
2607 PH/25 Applied John Jetmore's -Mset patch.
2609 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2611 PH/27 In a string expansion for a processed (not raw) header when multiple
2612 headers of the same name were present, leading whitespace was being
2613 removed from all of them, but trailing whitespace was being removed only
2614 from the last one. Now trailing whitespace is removed from each header
2615 before concatenation. Completely empty headers in a concatenation (as
2616 before) are ignored.
2618 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2619 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2621 PH/29 [Removed. This was a change that I later backed out, and forgot to
2622 correct the ChangeLog entry (that I had efficiently created) before
2623 committing the later change.]
2625 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2626 address errors (4xx response to RCPT) over the same connection as other
2627 messages routed to the same hosts. Such deliveries are always "forced",
2628 so retry times are not inspected. This resulted in far too many retries
2629 for the affected addresses. The effect occurred only when there were more
2630 hosts than the hosts_max_try setting in the smtp transport when it had
2631 the 4xx errors. Those hosts that it had tried were not added to the list
2632 of hosts for which the message was waiting, so if all were tried, there
2633 was no problem. Two fixes have been applied:
2635 (i) If there are any address or message errors in an SMTP delivery, none
2636 of the hosts (tried or untried) are now added to the list of hosts
2637 for which the message is waiting, so the message should not be a
2638 candidate for sending over the same connection that was used for a
2639 successful delivery of some other message. This seems entirely
2640 reasonable: after all the message is NOT "waiting for some host".
2641 This is so "obvious" that I'm not sure why it wasn't done
2642 previously. Hope I haven't missed anything, but it can't do any
2643 harm, as the worst effect is to miss an optimization.
2645 (ii) If, despite (i), such a delivery is accidentally attempted, the
2646 routing retry time is respected, so at least it doesn't keep
2647 hammering the server.
2649 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2650 in ${readsocket because some servers need this prod.
2652 PH/32 Added some extra debug output when updating a wait-xxx database.
2654 PH/33 The hint "could be header name not terminated by colon", which has been
2655 given for certain expansion errors for a long time, was not being given
2656 for the ${if def:h_colon_omitted{... case.
2658 PH/34 The spec says: "With one important exception, whenever a domain list is
2659 being scanned, $domain contains the subject domain." There was at least
2660 one case where this was not true.
2662 PH/35 The error "getsockname() failed: connection reset by peer" was being
2663 written to the panic log as well as the main log, but it isn't really
2664 panic-worthy as it just means the connection died rather early on. I have
2665 removed the panic log writing for the ECONNRESET error when getsockname()
2668 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2669 runs only) independently of the message's sender address. This meant
2670 that, if the 4xx error was in fact related to the sender, a different
2671 message to the same recipient with a different sender could confuse
2672 things. In particular, this can happen when sending to a greylisting
2673 server, but other circumstances could also provoke similar problems.
2674 I have changed the default so that the retry time for these errors is now
2675 based a combination of the sender and recipient addresses. This change
2676 can be overridden by setting address_retry_include_sender=false in the
2679 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2680 remote server are returned as part of bounce messages. This was not
2681 happening for LMTP over a pipe (the lmtp transport), but now it is the
2682 same for both kinds of LMTP.
2684 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2685 in header lines that were in fact CNAMEs. This is no longer the case.
2687 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2688 and queue runs started by the daemon processed all messages. This has
2689 been fixed so that -R and -S can now usefully be given with -q<time>.
2691 PH/40 Import PCRE release 6.7 (fixes some bugs).
2693 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2695 PH/42 Give an error if -q is specified more than once.
2697 PH/43 Renamed the variables $interface_address and $interface_port as
2698 $received_ip_address and $received_port, to make it clear that these
2699 values apply to message reception, and not to the outgoing interface when
2700 a message is delivered. (The old names remain recognized, of course.)
2702 PH/44 There was no timeout on the connect() call when using a Unix domain
2703 socket in the ${readsocket expansion. There now is.
2705 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2706 be meaningful with "accept".
2708 SC/01 Eximstats V1.43
2709 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2711 SC/02 Eximstats V1.44
2712 Use a glob alias rather than an array ref in the generated
2713 parser. This improves both readability and performance.
2715 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2716 Collect SpamAssassin and rejection statistics.
2717 Don't display local sender or destination tables unless
2718 there is data to show.
2719 Added average volumes into the top table text output.
2721 SC/04 Eximstats V1.46
2722 Collect data on the number of addresses (recipients)
2723 as well as the number of messages.
2725 SC/05 Eximstats V1.47
2726 Added 'Message too big' to the list of mail rejection
2727 reasons (thanks to Marco Gaiarin).
2729 SC/06 Eximstats V1.48
2730 Mainlog lines which have GMT offsets and are too short to
2731 have a flag are now skipped.
2733 SC/07 Eximstats V1.49 (Alain Williams)
2734 Added the -emptyok flag.
2736 SC/08 Eximstats V1.50
2737 Fixes for obtaining the IP address from reject messages.
2739 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2740 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2741 whitespace changes from 4.64-PH/27
2743 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2746 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2747 are found, allow negative numbers in numeric criteria)
2749 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2751 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2752 to match changes made in 4.64-PH/43
2754 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2756 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2757 "domain" is actually an IP address, and force a failure. This locks out
2758 those revolvers/nameservers that support "A-for-A" lookups, in
2759 contravention of the specifications.
2761 PH/48 When a host name was looked up from an IP address, and the subsequent
2762 forward lookup of the name timed out, the host name was left in
2763 $sender_host_name, contrary to the specification.
2765 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2766 restricted to single-key lookups, Exim was not diagnosing an error if
2767 * or *@ was used with a query-style lookup.
2769 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2771 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2772 long ago, but noone interested enough thought of it. Let's just say that
2773 the "1.1" means that there are some new functions that weren't there at
2774 some point in the past.
2776 PH/51 Error processing for expansion failure of helo_data from an smtp
2777 transport during callout processing was broken.
2779 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2780 tested/used via the -bh/-bhc/-bs options.
2782 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2783 bug, fixed in subsequent PCRE releases).
2785 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2786 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2788 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2794 SC/01 Use a glob alias rather than an array ref in eximstats generated
2795 parser. This improves both readability and performance.
2797 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2798 Don't display local sender or destination tables in eximstats unless
2799 there is data to show.
2800 Added average volumes into the eximstats top table text output.
2802 SC/03 Collect data on the number of addresses (recipients) as well
2803 as the number of messages in eximstats.
2805 TF/01 Correct an error in the documentation for the redirect router. Exim
2806 does (usually) call initgroups() when daemonizing.
2808 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2809 with consistent privilege compared to when running as a daemon.
2811 TF/03 Note in the spec that $authenticated_id is not set for local
2812 submissions from trusted users.
2814 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2815 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2817 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2818 by adding some example configuration directives to the default
2819 configuration file. A little bit of work is required to uncomment the
2820 directives and define how usernames and passwords are checked, but
2821 there is now a framework to start from.
2823 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2824 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2825 without this. I don't know how relevant this is to other LDAP libraries.
2827 PH/02 Add the verb name to the "unknown ACL verb" error.
2829 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2831 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2833 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2834 directory not expanded when it should be if an expanded home directory
2835 was set for the address (which is overridden by the transport).
2837 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2840 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2841 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2842 because it is too late at that time, and has no effect.
2844 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2845 security issue with \' (bugzilla #107). I could not use the
2846 PQescapeStringConn() function, because it needs a PGconn value as one of
2849 PH/08 When testing addresses using -bt, indicate those final addresses that
2850 are duplicates that would not cause an additional delivery. At least one
2851 person was confused, thinking that -bt output corresponded to deliveries.
2852 (Suppressing duplicates isn't a good idea as you lose the information
2853 about possibly different redirections that led to the duplicates.)
2855 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2856 systems where poll() doesn't work, in particular OS X.
2858 PH/10 Added more information to debugging output for retry time not reached.
2860 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2861 operations in malware.c.
2863 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2866 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2867 syslog_duplication set false, log lines that would normally be written
2868 both the the main log and to the reject log were not written to syslog at
2871 PH/14 In the default configuration, change the use of "message" in ACL warn
2872 statements to "add_header".
2874 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2875 not followed by a command (e.g. "seen endif").
2877 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2878 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2881 PH/17 Added extra conditions to the default value of delay_warning_condition
2885 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2886 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2887 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2890 The Auto-Submitted: and various List- headers are standardised, whereas I
2891 don't think Precedence: ever was.
2893 PH/18 Refactored debugging code in route_finduser() to show more information,
2894 in particular, the error code if getpwnam() issues one.
2896 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2897 This is apparently needed in addition to the PH/07 change above to avoid
2898 any possible encoding problems.
2900 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2901 but not after initializing Perl.
2903 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2904 output them only if debugging. By default they are written stderr,
2905 apparently, which is not desirable.
2907 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2910 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2913 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2915 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2916 authenticated or an ident call has been made. Suppress the default
2917 values for $authenticated_id and $authenticated_sender (but permit -oMai
2918 and -oMas) when testing with -bh.
2920 PH/24 Re-jigged the order of the tests in the default configuration so that the
2921 tests for valid domains and recipients precede the DNS black list and CSA
2922 tests, on the grounds that those ones are more expensive.
2924 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2925 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2926 This bug exists in every version of Exim that I still have, right back to
2929 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2930 However, an attempt to turn on case-sensitivity in a regex key by
2931 including (?-i) didn't work because the subject string was already
2932 lowercased, and the effects were non-intuitive. It turns out that a
2933 one-line patch can be used to allow (?-i) to work as expected.
2939 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2940 other effects) broke the use of negated acl sub-conditions.
2942 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2945 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2946 "Deny" causes Exim to reject the incoming connection with a 554 error.
2947 Unfortunately, if there is a major crisis, such as a disk failure,
2948 tcp-wrappers gives "deny", whereas what one would like would be some
2949 kind of temporary error. A kludge has been added to help with this.
2950 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2951 554 error is used if errno is still zero or contains ENOENT (which occurs
2952 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2955 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2957 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2958 errors. Otherwise a message that provokes a temporary error (when other
2959 messages do not) can cause a whole host to time out.
2961 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2962 addresses were routed directly to files or pipes from a redirect router.
2963 File deliveries just didn't batch; pipe deliveries might have suffered
2966 PH/06 A failure to get a lock for a hints database would erroneously always say
2967 "Failed to get write lock", even when it was really a read lock.
2969 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2970 of 0600. This has been changed to use the value of the lockfile_mode
2971 option (which defaults to 0600).
2973 PH/08 Applied small patch from the Sieve maintainer.
2975 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2976 folder from quota calculations, a direct delivery into this folder messed
2977 up the contents of the maildirsize file. This was because the regex was
2978 used only to exclude .Trash (or whatever) when the size of the mailbox
2979 was calculated. There was no check that a delivery was happening into an
2980 excluded directory. This bug has been fixed by ignoring all quota
2981 processing for deliveries into excluded directories.
2983 PH/10 Added the maildirfolder_create_regex option to appendfile.
2989 PH/01 The code for finding all the local interface addresses on a FreeBSD
2990 system running IPv6 was broken. This may well have applied to all BSD
2991 systems, as well as to others that have similar system calls. The broken
2992 code found IPv4 interfaces correctly, but gave incorrect values for the
2993 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2994 that it would not match correctly against @[] and not recognize the IPv6
2997 PH/02 The ipliteral router was not recognizing addresses of the form user@
2998 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3000 PH/03 Added disable_ipv6.
3002 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3003 decoded form, because it is most often used to construct To: headers
3004 lines in autoreplies, and the decoded form may well be syntactically
3005 invalid. However, $reply_address has leading white space removed, and all
3006 newlines turned into spaces so that the autoreply transport does not
3009 PH/05 If group was specified without a user on a router, and no group or user
3010 was specified on a transport, the group from the router was ignored.
3012 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3013 for visible compile-time settings that can be used to change these
3014 numbers, for those that want even more. Backwards compatibility with old
3015 spool files has been maintained. However, going back to a previous Exim
3016 release will lost any variables that are in spool files.
3018 PH/07 Two small changes when running in the test harness: increase delay when
3019 passing a TCP/IP connection to a new process, in case the original
3020 process has to generate a bounce, and remove special handling of
3021 127.0.0.2 (sic), which is no longer necessary.
3023 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3024 be the same on different OS.
3026 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3029 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3030 whether --show-vars was specified or not
3032 JJ/02 exipick: Added support for new ACL variable spool format introduced
3035 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3036 syntactically invalid From: or Reply-to: line, and a filter used this to
3037 generate an autoreply, and therefore failed to obtain an address for the
3038 autoreply, Exim could try to deliver to a non-existent relative file
3039 name, causing unrelated and misleading errors. What now happens is that
3040 it logs this as a hard delivery error, but does not attempt to create a
3043 PH/11 The exinext utility has a -C option for testing purposes, but although
3044 the given file was scanned by exinext itself; it wasn't being passed on
3045 when Exim was called.
3047 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3048 an end-of-file indication when reading a command response.
3050 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3051 compiled. In many other places in Exim, IPv6 addresses are always
3052 recognized, so I have changed this. It also means that IPv4 domain
3053 literals of the form [IPV4:n.n.n.n] are now always recognized.
3055 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3056 used if the router is not running as root, for example, when verifying at
3057 ACL time, or when using -bh. The debugging output from this situation was
3058 non-existent - all you got was a failure to exec. I have made two
3061 (a) Failures to set uid/gid, the current directory, or a process leader
3062 in a subprocess such as that created by queryprogram now generate
3063 suitable debugging output when -d is set.
3065 (b) The queryprogram router detects when it is not running as root,
3066 outputs suitable debugging information if -d is set, and then runs
3067 the subprocess without attempting to change uid/gid.
3069 PH/15 Minor change to Makefile for building test_host (undocumented testing
3072 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3073 additional section of a DNS packet that returns MX or SRV records.
3074 Instead, it always explicitly searches for A/AAAA records. This avoids
3075 major problems that occur when a DNS server includes only records of one
3076 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3077 fixed another bug: if SRV records were looked up and the corresponding
3078 address records were *not* found in the additional section, the port
3079 values from the SRV records were lost.
3081 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3082 using the correct key (the original address) when searching the retry
3083 rules in order to find which one to use for generating the retry hint.
3085 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3086 adding the default one. Similarly, if it contains a Reply-To: header, the
3087 errors_reply_to option, if set, is not used.
3089 PH/19 When calculating a retry time, Exim used to measure the "time since
3090 failure" by looking at the "first failed" field in the retry record. Now
3091 it does not use this if it is later than than the arrival time of the
3092 message. Instead it uses the arrival time. This makes for better
3093 behaviour in cases where some deliveries succeed, thus re-setting the
3094 "first failed" field. An example is a quota failure for a huge message
3095 when small messages continue to be delivered. Without this change, the
3096 "time since failure" will always be short, possible causing more frequent
3097 delivery attempts for the huge message than are intended.
3098 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3100 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3101 $1, $2, $3) because the numerical variables can be reset during some
3102 expansion items (e.g. "match"), thereby losing the authentication data.
3104 PH/21 Make -bV show the size of off_t variables so that the test suite can
3105 decide whether to run tests for quotas > 2G.
3107 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3108 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3109 filecount value is greater than 2G or if a quota value is greater than 2G
3110 on a system where the size of off_t is not greater than 4, a panic error
3113 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3114 never match. The debug and -bh output now contains an explicit error
3115 message indicating a malformed IPv4 address or mask.
3117 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3118 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3119 PH/23 above applies.
3121 PH/25 Do not write to syslog when running in the test harness. The only
3122 occasion when this arises is a failure to open the main or panic logs
3123 (for which there is an explicit test).
3125 PH/26 Added the /no_tell option to "control=freeze".
3127 PH/27 If a host name lookup failed very early in a connection, for example, if
3128 the IP address matched host_lookup and the reverse lookup yielded a name
3129 that did not have a forward lookup, an error message of the form "no IP
3130 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3131 could be logged. Now it outputs the IP address instead of "NULL".
3133 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3134 allows the sender and the authenticated sender to be set when
3135 submitting a message from within Exim. Since child_open_exim() is
3136 documented for local_scan(), the new function should be too.
3138 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3139 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3140 results in an empty string is now treated as unset.
3142 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3144 PH/31 Added sender_verify_fail logging option.
3146 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3147 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3148 tidied the source and removed it altogether.
3150 PH/33 When a queue run was abandoned because the load average was too high, a
3151 log line was always written; now it is written only if the queue_run log
3152 selector is set. In addition, the log line for abandonment now contains
3153 information about the queue run such as the pid. This is always present
3154 in "start" and "stop" lines but was omitted from the "abandon" line.
3156 PH/34 Omit spaces between a header name and the colon in the error message that
3157 is given when verify = headers_syntax fails (if there are lots of them,
3158 the message gets confusing).
3160 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3161 names, as there are now some PTR records that contain slashes. This check
3162 is only to protect against broken name servers that fall over on strange
3163 characters, so the fact that it applies to all lookups doesn't matter.
3165 PH/36 Now that the new test suite is complete, we can remove some of the
3166 special code in Exim that was needed for the old test suite. For example,
3167 sorting DNS records because real resolvers return them in an arbitrary
3168 order. The new test suite's fake resolver always returns records in the
3171 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3172 bounces) except when queue_only is set, to avoid logging races between
3173 the different processes.
3175 PH/38 Panic-die if .include specifies a non-absolute path.
3177 PH/39 A tweak to the "H" retry rule from its user.
3179 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3180 a label. They prevented compilation on older perls.
3182 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3183 a warning to be raised on newish perls.
3185 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3186 on queue. Changes to match documented behaviour of showing count of
3187 messages matching specified criteria.
3189 PH/40 Changed the default ident timeout from 30s to 5s.
3191 PH/41 Added support for the use of login_cap features, on those BSD systems
3192 that have them, for controlling the resources used by pipe deliveries.
3194 PH/42 The content-scanning code uses fopen() to create files in which to put
3195 message data. Previously it was not paying any attention to the mode of
3196 the files. Exim runs with umask(0) because the rest of the code creates
3197 files with open(), and sets the required mode explicitly. Thus, these
3198 files were ending up world-writeable. This was not a big issue, because,
3199 being within the spool directory, they were not world-accessible. I have
3200 created a function called modefopen, which takes an additional mode
3201 argument. It sets umask(777), creates the file, chmods it to the required
3202 mode, then resets the umask. All the relevant calls to fopen() in the
3203 content scanning code have been changed to use this function.
3205 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3206 to 24 hours. This avoids potential overflow problems when processing G
3207 and H retry rules. I suspect nobody ever tinkers with this value.
3209 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3211 PH/45 When the plaintext authenticator is running as a client, the server's
3212 challenges are checked to ensure they are valid base64 strings. By
3213 default, the authentication attempt is cancelled if an invalid string is
3214 received. Setting client_ignore_invalid_base64 true ignores these errors.
3215 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3216 they are received. Thus, the responses can be made to depend on the
3217 challenges. If an invalid string is ignored, an empty string is placed in
3220 PH/46 Messages that are created by the autoreply transport now contains a
3221 References: header, in accordance with RFCs 2822 and 3834.
3223 PH/47 Added authenticated_sender_force to the smtp transport.
3225 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3227 PH/49 Installed latest patch from the Sieve maintainer.
3229 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3230 was also set, the appendfile transport was unnecessarily scanning a
3231 directory of message files (e.g. for maildir delivery) to find the count
3232 of files (along with the size), even though it did not need this
3233 information. It now does the scan only if it needs to find either the
3234 size of the count of files.
3236 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3238 PH/52 Two bugs concerned with error handling when the smtp transport is
3241 (i) Exim was not creating retry information for temporary errors given
3242 for individual recipients after the DATA command when the smtp transport
3243 was used in LMTP mode. This meant that they could be retried too
3244 frequently, and not timed out correctly.
3246 (ii) Exim was setting the flag that allows error details to be returned
3247 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3248 recipients that were returned after the DATA command.
3250 PH/53 This is related to PH/52, but is more general: for any failing address,
3251 when detailed error information was permitted to be returned to the
3252 sender, but the error was temporary, then after the final timeout, only
3253 "retry timeout exceeded" was returned. Now it returns the full error as
3254 well as "retry timeout exceeded".
3256 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3257 do this, and (what is worse) MTAs that accept it.
3259 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3260 will now be deprecated.
3262 PH/56 New os.c-cygwin from the Cygwin maintainer.
3264 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3265 formats (previously only available in exim formats via -bpr, -bpru,
3266 and -bpra. Now also available in native and exiqgrep formats)
3268 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3269 with very large, slow to parse queues
3271 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3273 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3275 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3276 responses to authentication challenges, though it was showing the
3277 challenges; (ii) I've removed the CR characters from the debug output for
3280 PH/58 Allow for the insertion of a newline as well as a space when a string
3281 is turned into more than one encoded-word during RFC 2047 encoding. The
3282 Sieve code now uses this.
3284 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3285 data_4xx, lost_connection, tls_required.
3287 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3288 message was being sent as an SMTP response.
3290 PH/61 Add -l and -k options to exicyclog.
3292 PH/62 When verifying, if an address was redirected to one new address, so that
3293 verification continued, and the new address failed or deferred after
3294 having set something in $address_data, the value of $address_data was not
3295 passed back to the ACL. This was different to the case when no
3296 redirection occurred. The value is now passed back in both cases.
3298 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3299 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3300 use login_cap.h, so on its own it isn't the distinguishing feature. The
3301 new name refers directly to the setclassresources() function.
3303 PH/65 Added configuration files for NetBSD3.
3305 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3307 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3308 is preferred over IPv4.
3310 PH/68 The bounce_return_message and bounce_return_body options were not being
3311 honoured for bounces generated during the reception of non-SMTP messages.
3312 In particular, this applied to messages rejected by the ACL. This bug has
3313 been fixed. However, if bounce_return_message is true and bounce_return_
3314 body is false, the headers that are returned for a non-SMTP message
3315 include only those that have been read before the error was detected.
3316 (In the case of an ACL rejection, they have all been read.)
3318 PH/69 The HTML version of the specification is now built in a directory called
3319 spec_html instead of spec.html, because the latter looks like a path with
3320 a MIME-type, and this confuses some software.
3322 PH/70 Catch two compiler warnings in sieve.c.
3324 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3325 function verify_get_ident() calls ip_connect() to connect a socket, but
3326 if the "connect()" function timed out, ip_connect() used to close the
3327 socket. However, verify_get_ident() also closes the socket later, and in
3328 between Exim writes to the log, which may get opened at this point. When
3329 the socket was closed in ip_connect(), the log could get the same file
3330 descriptor number as the socket. This naturally causes chaos. The fix is
3331 not to close the socket in ip_connect(); the socket should be closed by
3332 the function that creates it. There was only one place in the code where
3333 this was missing, in the iplookup router, which I don't think anybody now
3334 uses, but I've fixed it anyway.
3336 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3337 well as to direct DNS lookups. Otherwise the handling of names in host
3338 lists is inconsistent and therefore confusing.
3344 PH/01 Two changes to the default runtime configuration:
3346 (1) Move the checks for relay_from_hosts and authenticated clients from
3347 after to before the (commented out) DNS black list checks.
3349 (2) Add control=submission to the relay_from_hosts and authenticated
3350 clients checks, on the grounds that messages accepted by these
3351 statements are most likely to be submissions.
3353 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3355 (1) Generate an error if the third argument for the ${prvs expansion is
3358 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3361 (3) Reset the variables that are obtained from the first argument of
3362 ${prvscheck and used in the second argument before leaving the code,
3363 because their memory is reclaimed, so using them afterwards may do
3366 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3367 one (it's much easier than Tom thought :-).
3369 (5) Because of (4), we can now allow for the use of $prvscheck_result
3370 inside the third argument.
3372 PH/03 For some reason, the default setting of PATH when running a command from
3373 a pipe transport was just "/usr/bin". I have changed it to
3376 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3377 anything to be listed in the output from -bV.
3379 PH/05 When a filter generated an autoreply, the entire To: header line was
3380 quoted in the delivery log line, like this:
3382 => >A.N.Other <ano@some.domain> <original@ddress> ...
3384 This has been changed so that it extracts the operative address. There
3385 may be more than one such address. If so, they are comma-separated, like
3388 => >ano@some.domain,ona@other.domain <original@ddress> ...
3390 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3391 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3392 not being looked up in the rDNS to get a host name, Exim was showing the
3393 IP address twice in Received: lines, even though the IP addresses were
3394 identical. For example:
3396 Received: from [1.2.3.4] (helo=[1.2.3.4])
3398 However, if the real host name was known, it was omitting the HELO data
3399 if it matched the actual IP address. This has been tidied up so that it
3400 doesn't show the same IP address twice.
3402 PH/07 When both +timestamp and +memory debugging was on, the value given by
3403 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3404 called by the debug printing, thereby overwriting the timestamp buffer.
3405 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3407 PH/08 When the original message was included in an autoreply transport, it
3408 always said "this is a copy of the message, including all the headers",
3409 even if body_only or headers_only was set. It now gives an appropriate
3412 PH/09 Applied a patch from the Sieve maintainer which:
3414 o fixes some comments
3415 o adds the (disabled) notify extension core
3416 o adds some debug output for the result of if/elsif tests
3417 o points to the current vacation draft in the documentation
3418 and documents the missing references header update
3422 o fixes a bug in processing the envelope test (when testing
3423 multiple envelope elements, the last element determined the
3426 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3427 Electronic Mail") by including:
3429 Auto-submitted: auto-generated
3431 in the messages that it generates (bounce messages and others, such as
3432 warnings). In the case of bounce messages for non-SMTP messages, there was
3433 also a typo: it was using "Auto_submitted" (underscore instead of
3434 hyphen). Since every message generated by Exim is necessarily in response
3435 to another message, thes have all been changed to:
3437 Auto-Submitted: auto-replied
3439 in accordance with these statements in the RFC:
3441 The auto-replied keyword:
3443 - SHOULD be used on messages sent in direct response to another
3444 message by an automatic process,
3446 - MUST NOT be used on manually-generated messages,
3448 - MAY be used on Delivery Status Notifications (DSNs) and Message
3449 Disposition Notifications (MDNs),
3451 - MUST NOT be used on messages generated by automatic or periodic
3452 processes, except for messages which are automatic responses to
3455 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3456 to the default Received: header definition.
3458 PH/12 Added log selector acl_warn_skipped (default on).
3460 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3461 variables because (a) they are in the wrong storage pool and (b) even if
3462 they were copied, it wouldn't work properly because of the caching.
3464 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3465 checking when decoding. Apparently there are clients that generate
3466 overlong encoded strings. Why am I not surprised?
3468 PH/15 If the first argument of "${if match_address" was not empty, but did not
3469 contain an "@" character, Exim crashed. Now it writes a panic log message
3470 and treats the condition as false.
3472 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3474 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3475 extension "envelope-auth". The code is finished and in agreement with
3476 other implementations, but there is no documentation so far and in fact,
3477 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3478 not changing the active code.
3480 Print executed "if" and "elsif" statements when debugging is used. This
3481 helps a great deal to understand what a filter does.
3483 Document more things not specified clearly in RFC3028. I had all this
3484 sorted out, when out of a sudden new issues came to my mind. Oops."
3486 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3489 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3490 canonical form (as documented). However, after a host name lookup from
3491 the IP address, check_host() was doing a simple string comparison with
3492 addresses acquired from the DNS when checking that the found name did
3493 have the original IP as one of its addresses. Since any found IPv6
3494 addresses are likely to be in abbreviated form, the comparison could
3495 fail. Luckily, there already exists a function for doing the comparison
3496 by converting both addresses to binary, so now that is used instead of
3497 the text comparison.
3499 PH/20 There was another similar case to PH/19, when a complete host name was
3500 given in a host list; looking up its IP address could give an abbreviated
3501 form, whereas the current host's name might or might not be abbreviated.
3502 The same fix has been applied.
3508 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3509 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3512 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3513 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3515 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3517 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3518 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3519 Also, for "Auto-Submitted", treat anything other than "no" as
3520 non-personal, in accordance with RFC 3834. (Previously it treated
3521 anything starting "auto-" as non-personal.)
3523 TF/01 The control=submission/name=... option had a problem with syntax
3524 errors if the name included a slash character. The /name= option
3525 now slurps the rest of the string, so it can include any characters
3526 but it must come last in the list of options (after /sender_retain
3529 PH/05 Some modifications to the interface to the fake nameserver for the new
3537 TK/01 Added the "success_on_redirect" address verification option. See
3538 NewStuff for rationale and an example.
3540 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3542 PH/02 Patch to exigrep to allow it to work on syslog lines.
3544 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3545 fread() to skip over the body file's header line, because in Cygwin the
3546 header line is locked and is inaccessible.
3548 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3549 co-exist for some time) to make it clear that it is the Exim ID that is
3550 referenced, not the Message-ID: header line.
3552 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3553 string_format() function, because snprintf() does not exist on all
3556 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3557 ${stat: expansion item.
3559 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3560 protocol synchronization error", to keep the pedants happy.
3562 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3563 well as for IRIX systems, when gcc is being used. See the host.c source
3566 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3568 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3571 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3572 transport and to the smtp transport in LMTP mode.
3574 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3576 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3577 run a filter in a subprocess. This could lead to confusion in subsequent
3578 lookups in the parent process. There should also be a search_tidyup() at
3579 the end of the subprocess.
3581 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3582 only if the host matched helo_try_verify_hosts, which caused the
3583 verification to occur when the EHLO/HELO command was issued. The ACL just
3584 tested the remembered result. Now, if a previous verification attempt has
3585 not happened, "verify = helo" does it there and then.
3587 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3589 TK/03 Fix log output including CR from clamd.
3591 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3592 exist provoked a memory error which could cause a segfault.
3594 PH/15 Installed PCRE 6.2
3596 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3598 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3599 of the problem. Specifically, suggested +O2 rather than +O1 for the
3602 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3604 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3605 record, the port was not correctly logged when the outgoing_port log
3606 selector was set (it logged the transort's default port).
3608 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3609 fallback_hosts, and "hosts" in the smtp transport.
3611 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3612 host errors such as "Connection refused".
3614 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3615 authentication with radiusclient 0.4.9:
3617 - Error returned from rc_read_config was caught wrongly
3618 - Username/password not passed on to radius server due to wrong length.
3620 The presumption is that some radiusclient API changes for 4.51/PH/17
3621 were not taken care of correctly. The code is still untested by me (my
3622 Linux distribution still has 0.3.2 of radiusclient), but it was
3623 contributed by a Radius user.
3625 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3626 expanding the "port" option of the smtp transport.
3628 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3629 while reading a MIME header. Thanks to Tom Hughes for a patch.
3631 PH/24 Include config.h inside local_scan.h so that configuration settings are
3634 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3635 that in an ACL for RCPT (for example), you can examine exactly what was
3638 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3639 commands, but it was not correctly comparing the address with the actual
3640 client host address. Thus, it would show the EHLO address in Received:
3641 header lines when this was not necessary.
3643 PH/27 Added the % operator to ${eval:}.
3645 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3646 it should be ignoring failures (because with -C, for example, it has lost
3647 privilege). It wasn't ignoring creation failures other than "already
3650 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3653 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3654 because an input line was too long, either on its own, or by virtue of
3655 too many continuations, the temporary file was not being removed, and the
3656 return code was incorrect.
3658 PH/31 Missing "BOOL" in function definition in filtertest.c.
3660 PH/32 Applied Sieve patches from the maintainer.
3662 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3664 PH/33 Added "verify = not_blind".
3666 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3667 Local/Makefile (with some defaults set). These are used in built scripts
3668 such as exicyclog, but they have never been used in the exim_install
3669 script (though there are many overriding facilities there). I have
3670 arranged that the exim_install script now takes note of these two
3673 PH/35 Installed configuration files for Dragonfly.
3675 PH/36 When a locally submitted message by a trusted user did not contain a
3676 From: header, and the sender address was obtained from -f or from an SMTP
3677 MAIL command, and the trusted user did not use -F to supply a sender
3678 name, $originator_name was incorrectly used when constructing a From:
3679 header. Furthermore, $originator_name was used for submission mode
3680 messages from external hosts without From: headers in a similar way,
3681 which is clearly wrong.
3683 PH/37 Added control=suppress_local_fixups.
3685 PH/38 When log_selector = +received_sender was set, and the addition of the
3686 sender made the log line's construction buffer exactly full, or one byte
3687 less than full, an overflow happened when the terminating "\n" was
3690 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3691 when the result of a list match is failure because a DNS lookup failed.
3693 PH/40 RM_COMMAND is now used in the building process.
3695 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3696 the "build-* directories that it finds.
3698 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3699 address in a domain literal was a prefix of an interface address.
3701 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3702 when verifying a sender address, unless rewrite_headers is false.
3704 PH/44 Wrote a long comment about why errors_to addresses are verified as
3705 recipients, not senders.
3707 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3708 the ratelimit ACL was added.
3710 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3712 PH/46 Added extra information about PostgreSQL errors to the error string.
3714 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3715 avoiding the need to install special zones in a real server. This is
3716 backwards compatible; if it can't find the fake resolver, it drops back.
3717 Thus, both old and new test suites can be run.
3719 TF/02 Added util/ratelimit.pl
3721 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3722 clock is set back in time.
3724 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3725 Candler <B.Candler@pobox.com>.
3727 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3728 OK for addresses that are the result of redirections.
3730 PH/48 A number of further additions for the benefit of the new test suite,
3731 including a fake gethostbyname() that interfaces to the fake DNS resolver
3734 TF/06 The fix for widen_domains has also been applied to qualify_single and
3735 search_parents which are the other dnslookup options that can cause
3738 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3741 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3743 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3744 service" if it encountered an MX record with an empty target hostname.
3745 The message is now "an MX or SRV record indicated no SMTP service".
3747 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3748 if the DNS of the sending site is misconfigured. This is quite a
3749 common situation. This change restores the behaviour of treating a
3750 helo verification defer as a failure.
3752 PH/51 If self=fail was set on a router, the bounce message did not include the
3753 actual error message.
3759 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3761 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3762 command itself ended in error, the underlying message about the transport
3763 filter timeout was being overwritten with the pipe command error. Now the
3764 underlying error message should be appended to the second error message.
3766 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3768 PH/02 Reduce the amount of output that "make" produces by default. Full output
3769 can still be requested.
3771 PH/03 The warning log line about a condition test deferring for a "warn" verb
3772 was being output only once per connection, rather than after each
3773 occurrence (because it was using the same function as for successful
3774 "warn" verbs). This seems wrong, so I have changed it.
3776 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3777 it should not have, which might have caused a crash in the right
3778 circumstances, but probably never did.
3780 PH/04 Installed a modified version of Tony Finch's patch to make submission
3781 mode fix the return path as well as the Sender: header line, and to
3782 add a /name= option so that you can make the user's friendly name appear
3785 TF/03 Added the control = fakedefer ACL modifier.
3787 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3788 Mark Lowes for thorough testing.
3790 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3792 TK/03 Merged latest SRS patch from Miles Wilton.
3794 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3795 with the definition in sysexits.h (which is #included earlier).
3796 Fortunately, Exim does not actually use EX_OK. The code used to try to
3797 preserve the sysexits.h value, by assuming that macro definitions were
3798 scanned for macro replacements. I have been disabused of this notion,
3799 so now the code just undefines EX_OK before #including unistd.h.
3801 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3802 in the smtp transport. When a block could not be written in a single
3803 write() function, the timeout was being re-applied to each part-write.
3804 This seems wrong - if the receiver was accepting one byte at a time it
3805 would take for ever. The timeout is now adjusted when this happens. It
3806 doesn't have to be particularly precise.
3808 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3809 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3811 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3812 without a domain if the check to <postmaster@domain> fails.
3814 SC/01 Eximstats: added -xls and the ability to specify output files
3815 (patch written by Frank Heydlauf).
3817 SC/02 Eximstats: use FileHandles for outputting results.
3819 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3821 SC/04 Eximstats: fixed display of large numbers with -nvr option
3823 SC/05 Eximstats: fixed merging of reports with empty tables.
3825 SC/06 Eximstats: added the -include_original_destination flag
3827 SC/07 Eximstats: removed tabs and trailing whitespace.
3829 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3831 TK/06 MBOX spool code: Add real "From " MBOX separator line
3832 so the .eml file is really in mbox format (even though
3833 most programs do not really care). Patch from Alex Miller.
3835 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3836 The latter is generated from $received_to and is only set if the
3837 message has one envelope recipient. SA can use these headers,
3838 obviously out-of-the-box. Patch from Alex Miller.
3840 PH/08 The ${def test on a variable was returning false if the variable's
3841 value was "0", contrary to what the specification has always said!
3842 The result should be true unless the variable is empty.
3844 PH/09 The syntax error of a character other than { following "${if
3845 def:variable_name" (after optional whitespace) was not being diagnosed.
3846 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3847 accidental colon was present, for example, could give incorrect results.
3849 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3850 result is used (not including appendfile, where other changes are about
3853 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3854 This involved changing a lot of size variables from int to off_t. It
3855 should work with maildirs and everything.
3857 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3858 spamd dying while we are connected to it.
3860 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3863 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3864 function for BDB 4.3.
3866 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3868 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3869 the sources for PCRE have been re-arranged and more files are now
3872 PH/15 The code I had for printing potentially long long variables in PH/11
3873 above was not the best (it lost precision). The length of off_t variables
3874 is now inspected at build time, and an appropriate printing format (%ld
3875 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3876 to be "long long int" or "long int". This is needed for the internal
3877 formatting function string_vformat().
3879 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3880 the configuration file to be ":syslog", then the script "guesses" where
3881 the logs files are, rather than using the compiled in default. In our
3882 case the guess is not the same as the compiled default, so the script
3883 suddenly stopped working when I started to use syslog. The patch checks
3884 to see if log_file_path is "". If so, it attempts to read it from exim
3885 with no configuration file to get the compiled in version, before it
3886 falls back to the previous guessing code."
3888 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3889 implementing BATV in an Exim configuration. See NewStuff for the gory
3892 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3893 Makefile that are specific to HP-UX.
3895 PH/18 If the "use_postmaster" option was set for a recipient callout together
3896 with the "random" option, the postmaster address was used as the MAIL
3897 FROM address for the random test, but not for the subsequent recipient
3898 test. It is now used for both.
3900 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3901 patch removes a few documentation additions to RFC 3028, because the
3902 latest draft now contains them. It adds the new en;ascii-case comparator
3903 and a new error check for 8bit text in MIME parts. Comparator and
3904 require names are now matched exactly. I enabled the subaddress
3905 extension, but it is not well tested yet (read: it works for me)."
3907 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3908 rework some of the code of TK/09 above to avoid the hardwired use of
3909 "%lld" and "long long". Replaced the call to snprintf() with a call to
3912 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3913 records point to non-existent hosts", "retry timeout exceeded", and
3914 "retry time not reached for any host after a long failure period".
3916 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3917 experimental DomainKeys support:
3919 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3920 (2) On an error such as an illegally used "control", the wrong name for
3921 the control was given.
3923 These problems did NOT occur unless DomainKeys support was compiled.
3925 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3927 PH/24 Added ${if match_ip condition.
3929 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3930 databases so that it will be absolutely obvious if a crash occurs in the
3931 DB library. This is a regular occurrence (often caused by mis-matched
3934 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3935 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3936 picked up on a user's system that detects such things. There doesn't seem
3937 to be a gcc warning option for this - only an attribute that has to be
3938 put on the function's prototype. It seems that in Fedora Core 4 they have
3939 set this on a number of new functions. No doubt there will be more in due
3942 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3943 specify a transport. However, if an address that was verified by such a
3944 router was the subject of a callout, Exim crashed because it tried to
3945 read the rcpt_include_affixes from the non-existent transport. Now it
3946 just assumes that the setting of that option is false. This bug was
3947 introduced by 4.51/PH/31.
3949 PH/28 Changed -d+all to exclude +memory, because that information is very
3950 rarely of interest, but it makes the output a lot bigger. People tend to
3951 do -d+all out of habit.
3953 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3954 code in os-type was giving problems when libc.so lives in lib64, like on
3957 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3958 aren't the modern standard, and it seems that some systems' include files
3959 don't always have them. Exim was already checking for some of the newer
3960 ones like T_AAAA, and defining it itself. I've added checks for all the
3961 record types that Exim uses.
3963 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3964 not automatically generating a new one, as it is supposed to. This
3965 prevented TLS from working. If the file did exist, but contained invalid
3966 data, a new version was generated, as expected. It was only the case of a
3967 non-existent file that was broken.
3969 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3970 with a change in libdomainkeys > 0.64.
3972 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3973 from DNS. If the selector record carries the flag, it now has
3974 precedence over the domain-wide flag.
3976 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3978 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3979 the use of a port name that isn't defined in /etc/services) occurred, the
3980 message was deferred as in a normal delivery, and thus remained on the
3981 spool, instead of being failed because of the mua_wrapper setting. This
3982 is now fixed, and I tidied up some of the mua_wrapper messages at the
3985 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3986 the messages in a hash of arrays rather than using individual hashes.
3987 This is a bit cleaner and results in dramatic memory savings, albeit
3988 at a slight CPU cost.
3990 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3991 as requested by Marc Sherman.
3993 SC/10 Eximstats: added histograms for user specified patterns as requested
3996 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3998 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3999 fopen() in the content-scanning modules that did not already have it.
4005 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4006 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4008 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4010 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4012 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4013 to test Sieve filters that use "vacation".
4015 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4016 that changes the way the GnuTLS parameters are stored in the cache file.
4017 The new format can be generated externally. For backward compatibility,
4018 if the data in the cache doesn't make sense, Exim assumes it has read an
4019 old-format file, and it generates new data and writes a new file. This
4020 means that you can't go back to an older release without removing the
4023 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4024 work if there are any delivery delays because "one_time" forces the
4025 parent to be marked "delivered", so its unseen clone is never tried
4026 again. For this reason, Exim now forbids the simultaneous setting of
4029 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4030 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4031 entry if you want to know the details. The fix, however, neglected to
4032 consider the case when local delivery batching is involved. The test for
4033 "previously delivered" was not happening when checking to see if an
4034 address could be batched with a previous (undelivered) one; under
4035 certain circumstances this could lead to multiple deliveries to the same
4038 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4039 in its include files, and this causes problems building Exim.
4041 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4042 header_syntax) but Exim was just ignoring anything given after a slash.
4043 In particular, this caused confusion with an attempt to use "verify =
4044 reverse_host_lookup/defer_ok". An error is now given when options are
4045 supplied for verify items that do not have them. (Maybe reverse_host_
4046 lookup should have a defer_ok option, but that's a different point.)
4048 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4049 defined by RFC 821) to 2048, because there were problems with some AUTH
4050 commands, and RFC 1869 says the size should be increased for extended
4051 SMTP commands that take arguments.
4053 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4056 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4057 "unknown" error; now it says that the functionality isn't in the binary.
4059 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4060 an address' error message when a string expansion fails (syntax or
4061 whatever). Otherwise the password may appear in the log. Following change
4062 PH/42 below, there is no longer a chance of it appearing in a bounce
4065 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4067 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4068 of its addresses was ever tried. (Bugzilla bug #2.)
4070 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4071 the result incorrectly in the debug output. (It correctly added a newline
4072 to what was transported.)
4074 TF/01 Added $received_time.
4076 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4077 commented out examples of how to interface to a virus scanner and to
4078 SpamAssassin. Also added commented examples of av_scanner and
4079 spamd_address settings.
4081 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4082 and controls are allowed in which ACLs. There were a couple of minor
4083 errors. Some of the entries in the conditions table (which is a table of
4084 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4085 negation of where the condition IS allowed.
4087 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4089 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4090 header file does not have a version number, so I've had to invent a new
4091 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4092 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4093 radiusclient), but it was contributed by a Radius user.
4095 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4096 files or directories, for OpenSSL.
4098 PH/19 When an Exim process that is running as root has to create an Exim log
4099 file, it does so in a subprocess that runs as exim:exim so as to get the
4100 ownership right at creation (otherwise, other Exim processes might see
4101 the file with the wrong ownership). There was no test for failure of this
4102 fork() call, which would lead to the process getting stuck as it waited
4103 for a non-existent subprocess. Forks do occasionally fail when resources
4104 run out. I reviewed all the other calls to fork(); they all seem to check
4107 PH/20 When checking for unexpected SMTP input at connect time (before writing
4108 the banner), Exim was not dealing correctly with a non-positive return
4109 from the read() function. If the client had disconnected by this time,
4110 the result was a log entry for a synchronization error with an empty
4111 string after "input=" when read() returned zero. If read() returned -1
4112 (an event I could not check), uninitialized data bytes were printed.
4113 There were reports of junk text (parts of files, etc) appearing after
4116 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4118 PH/22 Added support for macro redefinition, and (re)definition in between
4119 driver and ACL definitions.
4121 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4122 forgetting to use the resulting value; it was using the unexpanded value.
4124 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4125 hadn't been configured. The fix is from Juergen Kreileder, who
4126 understands it better than I do:
4128 "Here's what I see happening with three configured cyrus_sasl
4129 authenticators configured (plain, login, cram-md5):
4131 On startup auth_cyrus_sasl_init() gets called for each of these.
4132 This means three calls to sasl_listmech() without a specified mech_list.
4133 => SASL tests which mechs of all available mechs actually work
4134 => three warnings about OTP not working
4135 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4137 With the patch, sasl_listmech() also gets called three times. But now
4138 SASL's mech_list option is set to the server_mech specified in the the
4139 authenticator. Or in other words, the answer from sasl_listmech()
4140 gets limited to just the mech you're testing for (which is different
4142 => the return list contains just 'plain' or 'login', 'cram-md5' or
4143 nothing depending on the value of ob->server_mech.
4145 I've just tested the patch: Authentication still works fine,
4146 unavailable mechs specified in the exim configuration are still
4147 caught, and the auth.log warnings about OTP are gone."
4149 PH/25 When debugging is enabled, the contents of the command line are added
4150 to the debugging output, even when log_selector=+arguments is not
4153 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4154 answer is "GNU", and only if the return is "GNU/something" is the answer
4157 PH/27 $acl_verify_message is now set immediately after the failure of a
4158 verification in an ACL, and so is available in subsequent modifiers. In
4159 particular, the message can be preserved by coding like this:
4161 warn !verify = sender
4162 set acl_m0 = $acl_verify_message
4164 Previously, $acl_verify_message was set only while expanding "message"
4165 and "log_message" when a very denied access.
4167 PH/28 Modified OS/os.c-Linux with
4169 -#ifndef OS_LOAD_AVERAGE
4170 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4172 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4173 nomenclature these days.)
4175 PH/29 Installed patch from the Sieve maintainer that adds the options
4176 sieve_useraddress and sieve_subaddress to the redirect router.
4178 PH/30 In these circumstances:
4179 . Two addresses routed to the same list of hosts;
4180 . First host does not offer TLS;
4181 . First host accepts first address;
4182 . First host gives temporary error to second address;
4183 . Second host offers TLS and a TLS session is established;
4184 . Second host accepts second address.
4185 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4186 and peerdn, if requested) that were in fact used only for the second
4189 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4190 attention to any local part prefix or suffix that was matched by the
4191 router that accepted the address. It now behaves in the same way as it
4192 does for delivery: the affixes are removed from the local part unless
4193 rcpt_include_affixes is set on the transport.
4195 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4196 timeout during the DATA phase of an incoming message.
4198 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4199 applied a patch sanctioned by the Sieve maintainer.
4201 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4202 the uid or gid is negative. A case of a negative gid caused this to be
4203 noticed. The fix allows for either to be negative.
4205 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4206 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4209 PH/36 The change PH/12 above was broken. Fixed it.
4211 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4212 the grounds that routing the same address twice would always produce the
4213 same answer. This might have been true once, but it is certainly no
4214 longer true now. Routing a child address may depend on the previous
4215 routing that produced that child. Some complicated redirection strategies
4216 went wrong when messages had multiple recipients, and made Exim's
4217 behaviour dependent on the order in which the addresses were given.
4219 I have moved the duplicate checking until after the routing is complete.
4220 Exim scans the addresses that are assigned to local and remote
4221 transports, and removes any duplicates. This means that more work will be
4222 done, as duplicates will always all be routed, but duplicates are
4223 presumably rare, so I don't expect this is of any significance.
4225 For deliveries to pipes, files, and autoreplies, the duplicate checking
4226 still happens during the routing process, since they are not going to be
4229 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4230 It corrects a timeout issue with spamd. This is Ian's comment: "The
4231 background is that sometimes spamd either never reads data from a
4232 connection it has accepted, or it never writes response data. The exiscan
4233 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4234 blindly assumes that writes won't block so it may never time out."
4236 PH/39 Allow G after quota size as well as K and M.
4238 PH/40 The value set for $authenticated_id in an authenticator may not contain
4239 binary zeroes or newlines because the value is written to log lines and
4240 to spool files. There was no check on this. Now the value is run through
4241 the string_printing() function so that such characters are converted to
4242 printable escape sequences.
4244 PH/41 $message_linecount is a new variable that contains the total number of
4245 lines in the message. Compare $body_linecount, which is the count for the
4248 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4249 bounce and delay warning messages, except in certain special cases, which
4252 (a) An SMTP error message from a remote host;
4253 (b) A message specified in a :fail: redirection;
4254 (c) A message specified in a "fail" command in a system filter;
4255 (d) A message specified in a FAIL return from the queryprogram router;
4256 (e) A message specified by the cannot_route_message router option.
4258 In these cases only, Exim does include the error details in bounce and
4259 warning messages. There are also a few cases where bland messages such
4260 as "unrouteable address" or "local delivery error" are given.
4262 PH/43 $value is now also set for the "else" part of a ${run expansion.
4264 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4265 being worked on, but at least Exim now implements the latest version to
4268 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4269 process to complete was treated as a delivery failure, a timeout while
4270 writing the message to the pipe was logged, but erroneously treated as a
4271 successful delivery. Such timeouts include transport filter timeouts. For
4272 consistency with the overall process timeout, these timeouts are now
4273 treated as errors, giving rise to delivery failures by default. However,
4274 there is now a new Boolean option for the pipe transport called
4275 timeout_defer, which, if set TRUE, converts the failures into defers for
4276 both kinds of timeout. A transport filter timeout is now identified in
4279 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4280 systems where "make" and "gmake" are different, calling "gmake" at top
4281 level broke things. I've arranged for the value of $(MAKE) to be passed
4282 from the Makefile to this script so that it can call the same version of
4286 A note about Exim versions 4.44 and 4.50
4287 ----------------------------------------
4289 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4290 changes of various kinds. As a consequence, a big documentation update was
4291 needed. This delayed the release for rather longer than seemed good, especially
4292 in the light of a couple of (minor) security issues. Therefore, the changes
4293 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4294 release. So 4.44 and 4.50 are in effect two different branches that both start
4297 I have left the 4.50 change log unchanged; it contains all the changes since
4298 4.43. The change log for 4.44 is below; many of its items are identical to
4299 those for 4.50. This seems to be the most sensible way to preserve the
4300 historical information.
4306 1. Minor wording change to the doc/README.SIEVE file.
4308 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4309 computation of the current number of files was incorrect.
4311 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4312 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4315 4. Give more explanation in the error message when the command for a transport
4316 filter fails to execute.
4318 5. There are several places where Exim runs a non-Exim command in a
4319 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4320 was being done only for the command run by the queryprogram router. It is
4321 now done for all such subprocesses. The other cases are: ${run, transport
4322 filters, and the commands run by the lmtp and pipe transports.
4324 6. Added CONFIGURE_GROUP build-time option.
4326 7. Some older OS have a limit of 256 on the maximum number of file
4327 descriptors. Exim was using setrlimit() to set 1000 as a large value
4328 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4329 systems. I've change it so that if it can't get 1000, it tries for 256.
4331 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4332 was an oversight, and furthermore, ever since the addition of extra
4333 controls (e.g. 4.43/32), the checks on when to allow different forms of
4334 "control" were broken. There should now be diagnostics for all cases when a
4335 control that does not make sense is encountered.
4337 9. Added the /retain_sender option to "control=submission".
4339 10. $recipients is now available in the predata ACL (oversight).
4341 11. Tidy the search cache before the fork to do a delivery from a message
4342 received from the command line. Otherwise the child will trigger a lookup
4343 failure and thereby defer the delivery if it tries to use (for example) a
4344 cached ldap connection that the parent has called unbind on.
4346 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4347 of $address_data from the recipient verification was clobbered by the
4348 sender verification.
4350 13. The value of address_data from a sender verification is now available in
4351 $sender_address_data in subsequent conditions in the ACL statement.
4353 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4355 15. Added a new option "connect=<time>" to callout options, to set a different
4358 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4359 was its contents. (It was OK if the option was not defined at all.)
4361 17. A "Completed" log line is now written for messages that are removed from
4362 the spool by the -Mrm option.
4364 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4365 information about exactly what failed.
4367 19. Added -dd to debug only the daemon process.
4369 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4370 handles timeouts, both on the server side and network timeouts. Renamed the
4371 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4373 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4374 It is now set to "smtps".
4376 22. $host_address is now set to the target address during the checking of
4377 ignore_target_hosts.
4379 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4380 being passed; this would have caused $sender_host_name to have been used if
4381 matching the list had actually called for a host name (not very likely,
4382 since this list is usually IP addresses). A host name is now passed as
4385 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4386 code that specifies a non-restarting handler (typically sigaction() in
4387 modern systems) in an attempt to fix a rare and obscure crash bug.
4389 25. Narrowed the window for a race in the daemon that could cause it to ignore
4390 SIGCHLD signals. This is not a major problem, because they are used only to
4391 wake it up if nothing else does.
4393 26. A malformed maildirsize file could cause Exim to calculate negative values
4394 for the mailbox size or file count. Odd effects could occur as a result.
4395 The maildirsize information is now recalculated if the size or filecount
4398 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4399 support for a long time. Removed HAVE_SYS_VFS_H.
4401 28. Installed the latest version of exipick from John Jetmore.
4403 29. In an address list, if the pattern was not a regular expression, an empty
4404 subject address (from a bounce message) matched only if the pattern was an
4405 empty string. Non-empty patterns were not even tested. This was the wrong
4406 because it is perfectly reasonable to use an empty address as part of a
4407 database query. An empty address is now tested by patterns that are
4408 lookups. However, all the other forms of pattern expect the subject to
4409 contain a local part and a domain, and therefore, for them, an empty
4410 address still always fails if the pattern is not itself empty.
4412 30. Exim went into a mad DNS loop when attempting to do a callout where the
4413 host was specified on an smtp transport, and looking it up yielded more
4414 than one IP address.
4416 31. Re-factored the code for checking spool and log partition space into a
4417 function that finds that data and another that does the check. The former
4418 is then used to implement four new variables: $spool_space, $log_space,
4419 $spool_inodes, and $log_inodes.
4421 32. The RFC2047 encoding function was originally intended for short strings
4422 such as real names; it was not keeping to the 75-character limit for
4423 encoded words that the RFC imposes. It now respects the limit, and
4424 generates multiple encoded words if necessary. To be on the safe side, I
4425 have increased the buffer size for the ${rfc2047: expansion operator from
4428 33. It is now permitted to omit both strings after an "if" condition; if the
4429 condition is true, the result is "true". As before, when the second string
4430 is omitted, a false condition yields an empty string. This makes it less
4431 cumbersome to write custom ACL and router conditions.
4433 34. Failure to deliver a bounce message always caused it to be frozen, even if
4434 there was an errors_to setting on the router. The errors_to setting is now
4437 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4438 canonical form (fully expanded) before being placed in
4439 $sender_host_address.
4441 36. The table in the code that translates DNS record types into text (T_A to
4442 "A" for instance) was missing entries for NS and CNAME. It is just possible
4443 that this could have caused confusion if both these types were looked up
4444 for the same domain, because the text type is used as part of Exim's
4445 per-process caching. But the chance of anyone hitting this buglet seems
4448 37. The dnsdb lookup has been extended in a number of ways.
4450 (1) There is a new type, "zns", which walks up the domain tree until it
4451 finds some nameserver records. It should be used with care.
4453 (2) There is a new type, "mxh", which is like "mx" except that it returns
4454 just the host names, not the priorities.
4456 (3) It is now possible to give a list of domains (or IP addresses) to be
4457 looked up. The behaviour when one of the lookups defers can be
4458 controlled by a keyword.
4460 (4) It is now possible to specify the separator character for use when
4461 multiple records are returned.
4463 38. The dnslists ACL condition has been extended: it is now possible to supply
4464 a list of IP addresses and/or domains to be looked up in a particular DNS
4467 39. Added log_selector=+queue_time_overall.
4469 40. When running the queue in the test harness, wait just a tad after forking a
4470 delivery process, to get repeatability of debugging output.
4472 41. Include certificate and key file names in error message when GnuTLS fails
4473 to set them up, because the GnuTLS error message doesn't include the name
4474 of the failing file when there is a problem reading it.
4476 42. Allow both -bf and -bF in the same test run.
4478 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4480 44. The "Exiscan patch" is now merged into the mainline Exim source.
4482 45. Sometimes the final signoff response after QUIT could fail to get
4483 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4484 < 0 before doing a fflush(). This bug looks as though it goes back to the
4485 introduction of TLS in release 3.20, but "sometimes" must have been rare
4486 because the tests only now provoked it.
4488 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4489 (this can affect the format of dates).
4491 47. exim_tidydb, when checking for the continued existence of a message for
4492 which it has found a message-specific retry record, was not finding
4493 messages that were in split spool directories. Consequently, it was
4494 deleting retry records that should have stayed in existence.
4496 48. Steve fixed some bugs in eximstats.
4498 49. The SPA authentication driver was not abandoning authentication and moving
4499 on to the next authenticator when an expansion was forced to fail,
4500 contradicting the general specification for all authenticators. Instead it
4501 was generating a temporary error. It now behaves as specified.
4503 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4504 (the order specifies the preference for clients). The order is now AES256,
4505 AES128, 3DES, ARCFOUR128.
4507 51. Small patch to Sieve code - explicitly set From: when generating an
4510 52. Exim crashed if a remote delivery caused a very long error message to be
4511 recorded - for instance if somebody sent an entire SpamAssassin report back
4512 as a large number of 550 error lines. This bug was coincidentally fixed by
4513 increasing the size of one of Exim's internal buffers (big_buffer) that
4514 happened as part of the Exiscan merge. However, to be on the safe side, I
4515 have made the code more robust (and fixed the comments that describe what
4518 53. Now that there can be additional text after "Completed" in log lines (if
4519 the queue_time_overall log selector is set), a one-byte patch to exigrep
4520 was needed to allow it to recognize "Completed" as not the last thing in
4523 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4524 patch that reportedly fixes this has been added. I am not expert enough to
4525 create a test for it. This is what the patch creator wrote:
4527 "I found a little strange behaviour of ldap code when working with
4528 Windows 2003 AD Domain, where users was placed in more than one
4529 Organization Units. When I tried to give exim partial DN, the exit code
4530 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4531 But simultaneously result of request was absolutely normal ldap result,
4532 so I produce this patch..."
4534 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4535 REFERENCE, so I have modified the code to exclude the patch when that macro
4538 55. Some experimental protocols are using DNS PTR records for new purposes. The
4539 keys for these records are domain names, not reversed IP addresses. The
4540 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4541 leaves it alone. Component reversal etc. now happens only for IP addresses.
4544 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4546 57. Double the size of the debug message buffer (to 2048) so that more of very
4547 long debug lines gets shown.
4549 58. The exicyclog utility now does better if the number of log files to keep
4550 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4552 59. Two changes related to the smtp_active_hostname option:
4554 (1) $smtp_active_hostname is now available as a variable.
4555 (2) The default for smtp_banner uses $smtp_active_hostname instead
4556 of $primary_hostname.
4558 60. The host_aton() function is supposed to be passed a string that is known
4559 to be a valid IP address. However, in the case of IPv6 addresses, it was
4560 not checking this. This is a hostage to fortune. Exim now panics and dies
4561 if the condition is not met. A case was found where this could be provoked
4562 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4563 components; fortuitously, this particular loophole had already been fixed
4564 by change 4.50/55 above.
4566 If there are any other similar loopholes, the new check in host_aton()
4567 itself should stop them being exploited. The report I received stated that
4568 data on the command line could provoke the exploit when Exim was running as
4569 exim, but did not say which command line option was involved. All I could
4570 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4571 running as the user.
4574 61. There was a buffer overflow vulnerability in the SPA authentication code
4575 (which came originally from the Samba project). I have added a test to the
4576 spa_base64_to_bits() function which I hope fixes it.
4579 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4580 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4582 63. The daemon start-up calls getloadavg() while still root for those OS that
4583 need the first call to be done as root, but it missed one case: when
4584 deliver_queue_load_max is set with deliver_drop_privilege. This is
4585 necessary for the benefit of the queue runner, because there is no re-exec
4586 when deliver_drop_privilege is set.
4588 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4589 This has been fixed.
4591 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4592 was in use, was not putting the data itself into the right store pool;
4593 consequently, it could be overwritten for a subsequent message in the same
4594 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4597 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4599 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4600 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4601 the function were treating the return as a boolean value, which happened to
4602 work because 0=false and not-0=true, but is not correct code.
4604 68. The host_aton() function was not handling scoped IPv6 addresses (those
4605 with, for example, "%eth0" on the end) correctly.
4607 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4608 negated items (that is, ~something) in unsigned ints. Some compilers
4609 apparently mutter when there is no cast.
4611 70. If an address verification called from an ACL failed, and did not produce a
4612 user-specific message (i.e. there was only a "system" message), nothing was
4613 put in $acl_verify_message. In this situation, it now puts the system
4616 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4617 session; change 4.31/43 added the unwanted input to the log line - except
4618 that it did not do this in the start of session case. It now does.
4620 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4621 This is wrong and can cause the other end to generate a synchronization
4622 error if it is another Exim or anything else that does the synchronization
4623 check. A QUIT command is no longer sent after a timeout.
4625 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4626 during host lookups.
4628 74. The defer_ok option of callout verification was not working if it was used
4629 when verifying addresses in header lines, that is, for this case:
4631 verify = header_sender/callout=defer_ok
4633 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4634 those file descriptors could be used for SMTP connections. If anything
4635 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4636 could be sent to the SMTP client, causing chaos. The daemon now opens
4637 stdin, stdout, and stderr to /dev/null when it puts itself into the
4640 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4641 log by default. The user can override this with suitable Perl magic.
4643 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4644 the log message when discard triggers, was not working for the DATA ACL or
4645 for the non-SMTP ACL.
4647 78. Error message wording change in sieve.c.
4649 79. If smtp_accept_max_per_host was set, the number of connections could be
4650 restricted to fewer than expected, because the daemon was trying to set up
4651 a new connection before checking whether the processes handling previous
4652 connections had finished. The check for completed processes is now done
4653 earlier. On busy systems, this bug wouldn't be noticed because something
4654 else would have woken the daemon, and it would have reaped the completed
4657 80. If a message was submitted locally by a user whose login name contained one
4658 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4659 It caused a spool format error. I have fixed the spool reading code. A
4660 related problem was that the "from" clause in the Received: line became
4661 illegal because of the space(s). It is now covered by ${quote_local_part.
4663 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4666 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4668 83. Patch from Sieve maintainer to fix unterminated string problem in
4669 "vacation" handling.
4671 84. Some minor changes to the Linux configuration files to help with other
4672 OS variants using glibc.
4674 85. One more patch for Sieve to update vacation handling to latest spec.
4677 ----------------------------------------------------
4678 See the note above about the 4.44 and 4.50 releases.
4679 ----------------------------------------------------
4685 1. Change 4.43/35 introduced a bug that caused file counts to be
4686 incorrectly computed when quota_filecount was set in an appendfile
4689 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4690 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4693 3. Give more explanation in the error message when the command for a transport
4694 filter fails to execute.
4696 4. There are several places where Exim runs a non-Exim command in a
4697 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4698 was being done only for the command run by the queryprogram router. It is
4699 now done for all such subprocesses. The other cases are: ${run, transport
4700 filters, and the commands run by the lmtp and pipe transports.
4702 5. Some older OS have a limit of 256 on the maximum number of file
4703 descriptors. Exim was using setrlimit() to set 1000 as a large value
4704 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4705 systems. I've change it so that if it can't get 1000, it tries for 256.
4707 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4708 was an oversight, and furthermore, ever since the addition of extra
4709 controls (e.g. 4.43/32), the checks on when to allow different forms of
4710 "control" were broken. There should now be diagnostics for all cases when a
4711 control that does not make sense is encountered.
4713 7. $recipients is now available in the predata ACL (oversight).
4715 8. Tidy the search cache before the fork to do a delivery from a message
4716 received from the command line. Otherwise the child will trigger a lookup
4717 failure and thereby defer the delivery if it tries to use (for example) a
4718 cached ldap connection that the parent has called unbind on.
4720 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4721 of $address_data from the recipient verification was clobbered by the
4722 sender verification.
4724 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4725 was its contents. (It was OK if the option was not defined at all.)
4727 11. A "Completed" log line is now written for messages that are removed from
4728 the spool by the -Mrm option.
4730 12. $host_address is now set to the target address during the checking of
4731 ignore_target_hosts.
4733 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4734 being passed; this would have caused $sender_host_name to have been used if
4735 matching the list had actually called for a host name (not very likely,
4736 since this list is usually IP addresses). A host name is now passed as
4739 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4740 code that specifies a non-restarting handler (typically sigaction() in
4741 modern systems) in an attempt to fix a rare and obscure crash bug.
4743 15. Narrowed the window for a race in the daemon that could cause it to ignore
4744 SIGCHLD signals. This is not a major problem, because they are used only to
4745 wake it up if nothing else does.
4747 16. A malformed maildirsize file could cause Exim to calculate negative values
4748 for the mailbox size or file count. Odd effects could occur as a result.
4749 The maildirsize information is now recalculated if the size or filecount
4752 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4753 support for a long time. Removed HAVE_SYS_VFS_H.
4755 18. Updated exipick to current release from John Jetmore.
4757 19. Allow an empty sender to be matched against a lookup in an address list.
4758 Previously the only cases considered were a regular expression, or an
4761 20. Exim went into a mad DNS lookup loop when doing a callout where the
4762 host was specified on the transport, if the DNS lookup yielded more than
4765 21. The RFC2047 encoding function was originally intended for short strings
4766 such as real names; it was not keeping to the 75-character limit for
4767 encoded words that the RFC imposes. It now respects the limit, and
4768 generates multiple encoded words if necessary. To be on the safe side, I
4769 have increased the buffer size for the ${rfc2047: expansion operator from
4772 22. Failure to deliver a bounce message always caused it to be frozen, even if
4773 there was an errors_to setting on the router. The errors_to setting is now
4776 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4777 canonical form (fully expanded) before being placed in
4778 $sender_host_address.
4780 24. Updated eximstats to version 1.33
4782 25. Include certificate and key file names in error message when GnuTLS fails
4783 to set them up, because the GnuTLS error message doesn't include the name
4784 of the failing file when there is a problem reading it.
4786 26. Expand error message when OpenSSL has problems setting up cert/key files.
4789 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4790 (this can affect the format of dates).
4792 28. exim_tidydb, when checking for the continued existence of a message for
4793 which it has found a message-specific retry record, was not finding
4794 messages that were in split spool directories. Consequently, it was
4795 deleting retry records that should have stayed in existence.
4797 29. eximstats updated to version 1.35
4798 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4799 1.35 - bugfix such that pie charts by volume are generated correctly
4801 30. The SPA authentication driver was not abandoning authentication and moving
4802 on to the next authenticator when an expansion was forced to fail,
4803 contradicting the general specification for all authenticators. Instead it
4804 was generating a temporary error. It now behaves as specified.
4806 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4807 (the order specifies the preference for clients). The order is now AES256,
4808 AES128, 3DES, ARCFOUR128.
4810 31. Small patch to Sieve code - explicitly set From: when generating an
4813 32. Exim crashed if a remote delivery caused a very long error message to be
4814 recorded - for instance if somebody sent an entire SpamAssassin report back
4815 as a large number of 550 error lines. This bug was coincidentally fixed by
4816 increasing the size of one of Exim's internal buffers (big_buffer) that
4817 happened as part of the Exiscan merge. However, to be on the safe side, I
4818 have made the code more robust (and fixed the comments that describe what
4821 33. Some experimental protocols are using DNS PTR records for new purposes. The
4822 keys for these records are domain names, not reversed IP addresses. The
4823 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4824 leaves it alone. Component reversal etc. now happens only for IP addresses.
4827 34. The host_aton() function is supposed to be passed a string that is known
4828 to be a valid IP address. However, in the case of IPv6 addresses, it was
4829 not checking this. This is a hostage to fortune. Exim now panics and dies
4830 if the condition is not met. A case was found where this could be provoked
4831 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4832 components; fortuitously, this particular loophole had already been fixed
4833 by change 4.50/55 or 4.44/33 above.
4835 If there are any other similar loopholes, the new check in host_aton()
4836 itself should stop them being exploited. The report I received stated that
4837 data on the command line could provoke the exploit when Exim was running as
4838 exim, but did not say which command line option was involved. All I could
4839 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4840 running as the user.
4843 35. There was a buffer overflow vulnerability in the SPA authentication code
4844 (which came originally from the Samba project). I have added a test to the
4845 spa_base64_to_bits() function which I hope fixes it.
4848 36. The daemon start-up calls getloadavg() while still root for those OS that
4849 need the first call to be done as root, but it missed one case: when
4850 deliver_queue_load_max is set with deliver_drop_privilege. This is
4851 necessary for the benefit of the queue runner, because there is no re-exec
4852 when deliver_drop_privilege is set.
4854 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4855 was in use, was not putting the data itself into the right store pool;
4856 consequently, it could be overwritten for a subsequent message in the same
4857 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4860 38. Sometimes the final signoff response after QUIT could fail to get
4861 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4862 < 0 before doing a fflush(). This bug looks as though it goes back to the
4863 introduction of TLS in release 3.20, but "sometimes" must have been rare
4864 because the tests only now provoked it.
4870 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4871 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4872 Now it returns an integer. A number of calls were still expecting a T/F
4873 return. Fortuitously, in all cases, the tests worked in OK situations,
4874 which is the norm. However, things would have gone wrong on any write
4875 failures on the smtp file descriptor. This function is used when sending
4876 messages over SMTP and also when doing verify callouts.
4878 2. When Exim is called to do synchronous delivery of a locally submitted
4879 message (the -odf or -odi options), it no longer closes stderr before doing
4882 3. Implemented the mua_wrapper option.
4884 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4886 5. Implemented the functions header_remove(), header_testname(),
4887 header_add_at_position(), and receive_remove_recipient(), and exported them
4890 6. If an ACL "warn" statement specified the addition of headers, Exim already
4891 inserted X-ACL-Warn: at the start if there was no header name. However, it
4892 was not making this test for the second and subsequent header lines if
4893 there were newlines in the string. This meant that an invalid header could
4894 be inserted if Exim was badly configured.
4896 7. Allow an ACL "warn" statement to add header lines at the start or after all
4897 the Received: headers, as well as at the end.
4899 8. Added the rcpt_4xx retry error code.
4901 9. Added postmaster_mailfrom=xxx to callout verification option.
4903 10. Added mailfrom=xxxx to the callout verification option, for verify=
4906 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4907 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4909 12. Inserted some casts to stop certain compilers warning when using pointer
4910 differences as field lengths or precisions in printf-type calls (mostly
4911 affecting debugging statements).
4913 13. Added optional readline() support for -be (dynamically loaded).
4915 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4916 same clock tick as a message's arrival, so that its received time was the
4917 same as the "first fail" time on the retry record, and that message
4918 remained on the queue past the ultimate address timeout, every queue runner
4919 would try a delivery (because it was past the ultimate address timeout) but
4920 after another failure, the ultimate address timeout, which should have then
4921 bounced the address, did not kick in. This was a "< instead of <=" error;
4922 in most cases the first failure would have been in the next clock tick
4923 after the received time, and all would be well.
4925 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4926 being recognized when the domain list was tested by the match_domain
4927 condition in an expansion string.
4929 16. Added the ${str2b64: operator.
4931 17. Exim was always calling setrlimit() to set a large limit for the number of
4932 processes, without checking whether the existing limit was already
4933 adequate. (It did check for the limit on file descriptors.) Furthermore,
4934 errors from getrlimit() and setrlimit() were being ignored. Now they are
4935 logged to the main and panic logs, but Exim does carry on, to try to do its
4936 job under whatever limits there are.
4938 18. Imported PCRE 5.0.
4940 19. Trivial typo in log message " temporarily refused connection" (the leading
4943 20. If the log selector return_path_on_delivery was set and an address was
4944 redirected to /dev/null, the delivery process crashed because it assumed
4945 that a return path would always be set for a "successful" delivery. In this
4946 case, the whole delivery is bypassed as an optimization, and therefore no
4949 21. Internal re-arrangement: the function for sending a challenge and reading
4950 a response while authentication was assuming a zero-terminated challenge
4951 string. It's now changed to take a pointer and a length, to allow for
4952 binary data in such strings.
4954 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4956 23. Exim was not respecting finduser_retries when seeking the login of the
4957 uid under which it was called; it was always trying 10 times. (The default
4958 setting of finduser_retries is zero.) Also, it was sleeping after the final
4959 failure, which is pointless.
4961 24. Implemented tls_on_connect_ports.
4963 25. Implemented acl_smtp_predata.
4965 26. If the domain in control=submission is set empty, Exim assumes that the
4966 authenticated id is a complete email address when it generates From: or
4967 Sender: header lines.
4969 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4970 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4971 chown and chgrp in /bin and hostname in /usr/bin.
4973 28. Exim was keeping the "process log" file open after each use, just as it
4974 does for the main log. This opens the possibility of it remaining open for
4975 long periods when the USR1 signal hits a daemon. Occasional processlog
4976 errors were reported, that could have been caused by this. Anyway, it seems
4977 much more sensible not to leave this file open at all, so that is what now
4980 29. The long-running daemon process does not normally write to the log once it
4981 has entered its main loop, and it closes the log before doing so. This is
4982 so that log files can straightforwardly be renamed and moved. However,
4983 there are a couple of unusual error situations where the daemon does write
4984 log entries, and I had neglected to close the log afterwards.
4986 30. The text of an SMTP error response that was received during a remote
4987 delivery was being truncated at 512 bytes. This is too short for some of
4988 the long messages that one sometimes sees. I've increased the limit to
4991 31. It is now possible to make retry rules that apply only when a message has a
4992 specific sender, in particular, an empty sender.
4994 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4995 it possible to be selective about when SMTP synchronization is enforced.
4997 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4999 32. Implemented hosts_connection_nolog.
5001 33. Added an ACL for QUIT.
5003 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5006 35. Added mailbox_size and mailbox_filecount to appendfile.
5008 36. Added control = no_multiline_responses to ACLs.
5010 37. There was a bug in the logic of the code that waits for the clock to tick
5011 in the case where the clock went backwards by a substantial amount such
5012 that the microsecond fraction of "now" was more than the microsecond
5013 fraction of "then" (but the whole seconds number was less).
5015 38. Added support for the libradius Radius client library this is found on
5016 FreeBSD (previously only the radiusclient library was supported).
5022 1. When certain lookups returned multiple values in the form name=value, the
5023 quoting of the values was not always being done properly. Specifically:
5024 (a) If the value started with a double quote, but contained no whitespace,
5026 (b) If the value contained whitespace other than a space character (i.e.
5027 tabs or newlines or carriage returns) it was not quoted.
5028 This fix has been applied to the mysql and pgsql lookups by writing a
5029 separate quoting function and calling it from the lookup code. The fix
5030 should probably also be applied to nisplus, ibase and oracle lookups, but
5031 since I cannot test any of those, I have not disturbed their existing code.
5033 2. A hit in the callout cache for a specific address caused a log line with no
5034 reason for rejecting RCPT. Now it says "Previous (cached) callout
5035 verification failure".
5037 3. There was an off-by-one bug in the queryprogram router. An over-long
5038 return line was truncated at 256 instead of 255 characters, thereby
5039 overflowing its buffer with the terminating zero. As well as fixing this, I
5040 have increased the buffer size to 1024 (and made a note to document this).
5042 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5043 when Exim is waiting for an SMTP response from a remote server, Exim
5044 restarts its select() call on the socket, thereby resetting its timeout.
5045 This is not a problem when such interrupts are rare. Somebody set up a cron
5046 job to run exiwhat every 2 minutes, which is less than the normal select()
5047 timeout (5 or 10 minutes). This meant that the select() timeout never
5048 kicked in because it was always reset. I have fixed this by comparing the
5049 time when an interrupt arrives with the time at the start of the first call
5050 to select(). If more time than the timeout has elapsed, the interrupt is
5051 treated as a timeout.
5053 5. Some internal re-factoring in preparation for the addition of Sieve
5054 extensions (by MH). In particular, the "personal" test is moved to a
5055 separate function, and given an option for scanning Cc: and Bcc: (which is
5056 not set for Exim filters).
5058 6. When Exim created an email address using the login of the caller as the
5059 local part (e.g. when creating a From: or Sender: header line), it was not
5060 quoting the local part when it contained special characters such as @.
5062 7. Installed new OpenBSD configuration files.
5064 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5065 try to make them clearer.
5067 9. Callout options, other than the timeout value, were being ignored when
5068 verifying sender addresses in header lines. For example, when using
5070 verify = header_sender/callout=no_cache
5072 the cache was (incorrectly) being used.
5074 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5075 only the Cygwin environment.
5077 11. When return_path_on_delivery was set as a log selector, if different remote
5078 addresses in the same message used different return paths and parallel
5079 remote delivery occurred, the wrong values would sometimes be logged.
5080 (Whenever a remote delivery process finished, the return path value from
5081 the most recently started remote delivery process was logged.)
5083 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5084 lines when AUTH and/or TLS are in use. This is the "received protocol"
5085 field. Exim used to use "asmtp" for authenticated SMTP, without any
5086 indication (in the protocol name) for TLS use. Now it follows the RFC and
5087 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5088 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5089 names appear in log lines as well as in Received: header lines.
5091 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5092 extensions, and comparison tests, and to fix some bugs.
5094 14. Changes to the "personal" filter test:
5096 (1) The test was buggy in that it was just doing the equivalent of
5097 "contains" tests on header lines. For example, if a user's address was
5098 anne@some.where, the "personal" test would incorrectly be true for
5100 To: susanne@some.where
5102 This test is now done by extracting each address from the header in turn,
5103 and checking the entire address. Other tests that are part of "personal"
5104 are now done using regular expressions (for example, to check local parts
5105 of addresses in From: header lines).
5107 (2) The list of non-personal local parts in From: addresses has been
5108 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5109 taken from the Sieve specification recommendations.
5111 (3) If the message contains any header line starting with "List-" it is
5112 treated as non-personal.
5114 (4) The test for "circular" in the Subject: header line has been removed
5115 because it now seems ill-conceived.
5117 15. Minor typos in src/EDITME comments corrected.
5119 16. Installed latest exipick from John Jetmore.
5121 17. If headers_add on a router specified a text string that was too long for
5122 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5123 of string_sprintf() is now avoided.
5125 18. $message_body_size was not set (it was always zero) when running the DATA
5126 ACL and the local_scan() function.
5128 19. For the "mail" command in an Exim filter, no default was being set for
5129 the once_repeat time, causing a random time value to be used if "once" was
5130 specified. (If the value happened to be <= 0, no repeat happened.) The
5131 default is now 0s, meaning "never repeat". The "vacation" command was OK
5132 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5133 (I found it when inspecting the code).
5135 20. There is now an overall timeout for performing a callout verification. It
5136 defaults to 4 times the callout timeout, which applies to individual SMTP
5137 commands during the callout. The overall timeout applies when there is more
5138 than one host that can be tried. The timeout is checked before trying the
5139 next host. This prevents very long delays if there are a large number of
5140 hosts and all are timing out (e.g. when the network connections are timing
5141 out). The value of the overall timeout can be changed by specifying an
5142 additional sub-option for "callout", called "maxwait". For example:
5144 verify = sender/callout=5s,maxwait=20s
5146 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5147 to the end before writing, but this should make it even safer).
5149 22. Exim was forgetting that it had advertised PIPELINING for the second and
5150 subsequent messages on an SMTP connection. It was also not resetting its
5151 memory on STARTTLS and an internal HELO.
5153 23. When Exim logs an SMTP synchronization error within a session, it now
5154 records whether PIPELINING has been advertised or not.
5156 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5157 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5158 rather than long int.
5160 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5162 26. Added the never_mail option to autoreply.
5168 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5169 crash if the getsockname() call failed; this can happen if a connection is
5170 closed very soon after it is established. The problem was simply in the
5171 order in which certain operations were done, causing Exim to try to write
5172 to the SMTP stream before it had set up the file descriptor. The bug has
5173 been fixed by making things happen in the correct order.
5179 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5180 before the connection was closed, thus losing the rejection response.
5182 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5183 some early Solaris releases, but causes trouble in current releases where
5184 socklen_t is defined.
5186 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5189 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5192 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5193 that releasing the top of it at the end releases what was used for sub-
5194 expansions (unless the block got too big). However, discard this block if
5195 the first thing is a variable or header, so that we can use its block when
5196 it is dynamic (useful for very large $message_headers, for example).
5198 6. Lookups now cache *every* query, not just the most recent. A new, separate
5199 store pool is used for this. It can be recovered when all lookup caches are
5200 flushed. Lookups now release memory at the end of their result strings.
5201 This has involved some general refactoring of the lookup sources.
5203 7. Some code has been added to the store_xxx() functions to reduce the amount
5204 of flapping under certain conditions.
5206 8. log_incoming_interface used to affect only the <= reception log lines. Now
5207 it causes the local interface and port to be added to several more SMTP log
5208 lines, for example "SMTP connection from", and rejection lines.
5210 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5212 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5214 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5215 could be overwritten at the end of the current message (or the start of a
5216 new message if it was set in a HELO ACL). The value is now preserved for
5217 the duration of the SMTP connection.
5219 12. If a transport had a headers_rewrite setting, and a matching header line
5220 contained an unqualified address, that address was qualified, even if it
5221 did not match any rewriting rules. The underlying bug was that the values
5222 of the flags that permit the existence of unqualified sender and recipient
5223 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5224 non-local messages, and by -bnq for local messages) were not being
5225 preserved with the message after it was received.
5227 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5228 "next input=" as part of the text comprising the host identity instead of
5229 the correct text. The code was using the same buffer for two different
5230 strings. However, depending on which order the printing function evaluated
5231 its arguments, the bug did not always show up. Under Linux, for example, my
5232 test suite worked just fine.
5234 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5235 doesn't work with some older versions of Perl. It has been changed to "my",
5236 which in any case is probably the better facility to use.
5238 15. A really picky compiler found some instances of statements for creating
5239 error messages that either had too many or two few arguments for the format
5242 16. The size of the buffer for calls to the DNS resolver has been increased
5243 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5244 for addresses that have a lot of PTR records. This alleviates a problem; it
5245 does not fully solve it.
5247 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5248 buffer now truncates the list and logs the incident, which is the same
5249 action as happens when Exim is looking up a host name and its aliases.
5250 Previously in this situation something unpredictable would happen;
5251 sometimes it was "internal error: store_reset failed".
5253 18. If a server dropped the connection unexpectedly when an Exim client was
5254 using GnuTLS and trying to read a response, the client delivery process
5255 crashed while trying to generate an error log message.
5257 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5258 string, for example:
5260 warn message = H1: something\nH2: something
5262 the text was added as a single header line from Exim's point of view
5263 though it ended up OK in the delivered message. However, searching for the
5264 second and subsequent header lines using $h_h2: did not work. This has been
5265 fixed. Similarly, if a system filter added multiple headers in this way,
5266 the routers could not see them.
5268 20. Expanded the error message when iplsearch is called with an invalid key to
5269 suggest using net-iplsearch in a host list.
5271 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5272 ACLs are no longer actually imposed (and a message to that effect is
5275 22. If a "gecos" field in a passwd entry contained escaped characters, in
5276 particular, if it contained a \" sequence, Exim got it wrong when building
5277 a From: or a Sender: header from that name. A second bug also caused
5278 incorrect handling when an unquoted " was present following a character
5279 that needed quoting.
5281 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5282 was not being matched caselessly.
5284 24. Arranged for all hyphens in the exim.8 source to be escaped with
5287 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5288 properly. Recipient callout cache records were still being keyed to include
5289 the sender, even when use_sender was set false. This led to far more
5290 callouts that were necessary. The sender is no longer included in the key
5291 when use_sender is false.
5293 26. Added "control = submission" modifier to ACLs.
5295 27. Added the ${base62d: operator to decode base 62 numbers.
5297 28. dnsdb lookups can now access SRV records.
5299 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5300 the configuration file.
5302 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5303 (-v) mode. This makes the output for a verbose queue run more intelligible.
5305 31. Added a use_postmaster feature to recipient callouts.
5307 32. Added the $body_zerocount variable, containing the number of binary zero
5308 bytes in the message body.
5310 33. The time of last modification of the "new" subdirectory is now used as the
5311 "mailbox time last read" when there is a quota error for a maildir
5314 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5316 35. Added +ignore_unknown as a special item in host lists.
5318 36. Code for decoding IPv6 addresses in host lists is now included, even if
5319 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5320 address was recognized as an IP address, but was then not correctly decoded
5321 into binary, causing unexpected and incorrect effects when compared with
5328 1. Very minor rewording of debugging text in manualroute to say "list of
5329 hosts" instead of "hostlist".
5331 2. If verify=header_syntax was set, and a header line with an unqualified
5332 address (no domain) and a large number of spaces between the end of the
5333 name and the colon was received, the reception process suffered a buffer
5334 overflow, and (when I tested it) crashed. This was caused by some obsolete
5335 code that should have been removed. The fix is to remove it!
5337 3. When running in the test harness, delay a bit after writing a bounce
5338 message to get a bit more predictability in the log output.
5340 4. Added a call to search_tidyup() just before forking a reception process. In
5341 theory, someone could use a lookup in the expansion of smtp_accept_max_
5342 per_host which, without the tidyup, could leave open a database connection.
5344 5. Added the variables $recipient_data and $sender_data which get set from a
5345 lookup success in an ACL "recipients" or "senders" condition, or a router
5346 "senders" option, similar to $domain_data and $local_part_data.
5348 6. Moved the writing of debug_print from before to after the "senders" test
5351 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5352 problems for message scanning, either using a data ACL, or using
5353 local_scan() because the Received: header was not generated till after they
5354 were called (in order to set the time as the time of reception completion).
5355 I have revised the way this works. The header is now generated after the
5356 body is received, but before the ACL or local_scan() are called. After they
5357 are run, the timestamp in the header is updated.
5363 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5364 before starting a queue runner without re-exec. This happened only when
5365 deliver_drop_privilege was set or when the Exim user was set to root. The
5366 effect of the bug was that timeouts during subsequent deliveries caused
5367 crashes instead of being properly handled. The handler is now left at its
5368 default (and expected) setting.
5370 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5371 message, again when deliver_drop_privilege is set or Exim is run as root.
5372 The bug described in (1) was not present in this case, but the tidying up
5373 of the other signals was missing. I have made the two cases consistent.
5375 3. The ignore_target_hosts setting on a manualroute router was being ignored
5376 for hosts that were looked up using the /MX notation.
5378 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5381 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5382 operated on the sender address. After changing the $sender_address to <>
5383 for the sender address verify, Exim was re-instated it as the original
5384 (before rewriting) address, but remembering that it had rewritten it, so it
5385 wasn't rewriting it again. This bug also had the effect of breaking the
5386 sender address verification caching when the sender address was rewritten.
5388 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5389 This has been changed so that if the ip literal address matches
5390 ignore_target_hosts, the router declines.
5392 7. Added expansion conditions match_domain, match_address, and match_local_
5393 part (NOT match_host).
5395 8. The placeholder for the Received: header didn't have a length field set.
5397 9. Added code to Exim itself and to exim_lock to test for a specific race
5398 condition that could lead to file corruption when using MBX delivery. The
5399 issue is with the lockfile that is created in /tmp. If this file is removed
5400 after a process has opened it but before that process has acquired a lock,
5401 there is the potential for a second process to recreate the file and also
5402 acquire a lock. This could lead to two Exim processes writing to the file
5403 at the same time. The added code performs the same test as UW imapd; it
5404 checks after acquiring the lock that its file descriptor still refers to
5405 the same named file.
5407 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5408 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5411 11. Added the smtp_active_hostname option. If used, this will typically be made
5412 to depend on the incoming interface address. Because $interface_address is
5413 not set up until the daemon has forked a reception process, error responses
5414 that can happen earlier (such as "too many connections") no longer contain
5417 12. If an expansion in a condition on a "warn" statement fails because a lookup
5418 defers, the "warn" statement is abandoned, and the next ACL statement is
5419 processed. Previously this caused the whole ACL to be aborted.
5421 13. Added the iplsearch lookup type.
5423 14. Added ident_timeout as a log selector.
5425 15. Added tls_certificate_verified as a log selector.
5427 16. Added a global option tls_require_ciphers (compare the smtp transport
5428 option of the same name). This controls incoming TLS connections.
5430 17. I finally figured out how to make tls_require_ciphers do a similar thing
5431 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5432 before starting the TLS session.
5434 18. Tabs are now shown as \t in -bP output.
5436 19. If the log selector return_path_on_delivery was set, Exim crashed when
5437 bouncing a message because it had too many Received: header lines.
5439 20. If two routers both had headers_remove settings, and the first one included
5440 a superfluous trailing colon, the final name in the first list and the
5441 first name in the second list were incorrectly joined into one item (with a
5442 colon in the middle).
5448 1. Added -C and -D options to the exinext utility, mainly to make it easier
5449 to include in the automated testing, but these could be helpful when
5450 multiple configurations are in use.
5452 2. The exinext utility was not formatting the output nicely when there was
5453 an alternate port involved in the retry record key, nor when there was a
5454 message id as well (for retries that were specific to a specific message
5455 and a specific host). It was also confused by IPv6 addresses, because of
5456 the additional colons they contain. I have fixed the IPv4 problem, and
5457 patched it up to do a reasonable job for IPv6.
5459 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5460 delivery, the log line now contains "pipelined" if PIPELINING was used.
5462 4. An SMTP transport process used to panic and die if the bind() call to set
5463 an explicit outgoing interface failed. This has been changed; it is now
5464 treated in the same way as a connect() failure.
5466 5. A reference to $sender_host_name in the part of a conditional expansion
5467 that was being skipped was still causing a DNS lookup. This no longer
5470 6. The def: expansion condition was not recognizing references to header lines
5471 that used bh_ and bheader_.
5473 7. Added the _cache feature to named lists.
5475 8. The code for checking quota_filecount in the appendfile transport was
5476 allowing one more file than it should have been.
5478 9. For compatibility with Sendmail, the command line option
5486 and sets the incoming protocol and host name (for trusted callers). The
5487 host name and its colon can be omitted when only the protocol is to be set.
5488 Note the Exim already has two private options, -pd and -ps, that refer to
5489 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5490 "s", but I don't think that's a major issue.
5492 10. A number of refactoring changes to the code, none of which should affect
5495 (a) The number of logging options was getting close to filling up the
5496 32-bit word that was used as a bit map. I have split them into two classes:
5497 those that are passed in the argument to log_write(), and those that are
5498 only ever tested independently outside of that function. These are now in
5499 separate 32-bit words, so there is plenty of room for expansion again.
5500 There is no change in the user interface or the logging behaviour.
5502 (b) When building, for example, log lines, the code previously used a
5503 macro that called string_cat() twice, in order to add two strings. This is
5504 not really sufficiently general. Furthermore, there was one instance where
5505 it was actually wrong because one of the argument was used twice, and in
5506 one call a function was used. (As it happened, calling the function twice
5507 did not affect the overall behaviour.) The macro has been replaced by a
5508 function that can join an arbitrary number of extra strings onto a growing
5511 (c) The code for expansion conditions now uses a table and a binary chop
5512 instead of a serial search (which was left over from when there were very
5513 few conditions). Also, it now recognizes conditions like "pam" even when
5514 the relevant support is not compiled in: a suitably worded error message is
5515 given if an attempt is made to use such a condition.
5517 11. Added ${time_interval:xxxxx}.
5519 12. A bug was causing one of the ddress fields not to be passed back correctly
5520 from remote delivery subprocesses. The field in question was not being
5521 subsequently used, so this caused to problems in practice.
5523 13. Added new log selectors queue_time and deliver_time.
5525 14. Might have fixed a bug in maildirsizefile handling that threw up
5526 "unexpected character" debug warnings, and recalculated the data
5527 unnecessarily. In any case, I expanded the warning message to give more
5530 15. Added the message "Restricted characters in address" to the statements in
5531 the default ACL that block characters like @ and % in local parts.
5533 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5534 Three changes have been made:
5536 (a) There was a serious bug; a negative response to MAIL caused the whole
5537 recipient domain to be cached as invalid, thereby blocking all messages
5538 to all local parts at the same domain, from all senders. This bug has
5539 been fixed. The domain is no longer cached after a negative response to
5540 MAIL if the sender used is not empty.
5542 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5545 (c) A new callout option, "use_sender" has been added for people who want
5546 the modified behaviour.
5552 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5555 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5556 indeed breaks things for older releases.
5558 3. Added additional logging to the case where there is a problem reading data
5559 from a filter that is running in a subprocess using a pipe, in order to
5560 try to track down a specific problem.
5562 4. Testing facility fudge: when running in the test harness and attempting
5563 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5564 getting "No route to host". Convert this to a timeout.
5566 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5569 6. Some OS don't have socklen_t but use size_t instead. This affects the
5570 fifth argument of getsockopt() amongst other things. This is now
5571 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5572 can be set for individual OS. I have set it for SunOS5, OSF1, and
5573 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5574 some earlier ones do not.
5576 7. Change 4.30/15 was not doing the test caselessly.
5578 8. The standard form for an IPv6 address literal was being rejected by address
5579 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5580 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5581 this, as well as the form without the "IPv6" on the front (but only when
5582 address literals are enabled, of course).
5584 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5586 10. Exim crashed if a message with an empty sender address specified by -f
5587 encountered a router with an errors_to setting. This could be provoked only
5588 by a command such as
5592 where an empty string was supplied; "<>" did not hit this bug.
5594 11. Installed PCRE release 4.5.
5596 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5597 remained set. It is now erased.
5599 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5600 times from message ids (which are base 36 rather than the normal 62).
5602 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5603 were being counted as actual protocol errors, and logged if the log
5604 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5605 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5606 and DATA following a set of rejected RCPTs do not count as protocol errors.
5607 In other words, Exim assumes they were pipelined, though this may not
5608 actually be the case. Of course, in all cases the client gets an
5609 appropriate error code.
5611 15. If a lookup fails in an ACL condition, a message about the failure may
5612 be available; it is used if testing the ACL cannot continue, because most
5613 such messages specify what the cause of the deferral is. However, some
5614 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5615 that caused an old message to be retained and used if a later statement
5616 caused a defer, replacing the real cause of the deferral.
5618 16. If an IP address had so many PTR records that the DNS lookup buffer
5619 was not large enough to hold them, Exim could crash while trying to process
5620 the truncated data. It now detects and logs this case.
5622 17. Further to 4.21/58, another change has been made: if (and only if) the
5623 first line of a message (the first header line) ends with CRLF, a bare LF
5624 in a subsequent header line has a space inserted after it, so as not to
5625 terminate the header.
5627 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5628 unnecessarily, used atoi() instead of strtol(), and didn't check the
5629 termination when getting file sizes from file names by regex.
5631 19. Completely re-implemented the support for maildirsize files, in the light
5632 of a number of problems with the previous contributed implementation
5633 (4.30/29). In particular:
5635 . If the quota is zero, the maildirsize file is maintained, but no quota is
5638 . If the maildir directory does not exist, it is created before any attempt
5639 to write a maildirsize file.
5641 . The quota value in the file is just a cache; if the quota is changed in
5642 the transport, the new value overrides.
5644 . A regular expression is available for excluding directories from the
5647 20. The autoreply transport checks the characters in options that define the
5648 message's headers; it allows continued headers, but it was checking with
5649 isspace() after an embedded newline instead of explicitly looking for a
5652 21. If all the "regular" hosts to which an address was routed had passed their
5653 expiry times, and had not reached their retry times, the address was
5654 bounced, even if fallback hosts were defined. Now Exim should go on to try
5657 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5658 equivalent code in the SMTP transport. Some hosts send humungous responses
5659 to HELO/EHLO, more than 1024 it seems.
5661 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5662 gives compiler warnings in some environments. I've now done it "properly",
5665 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5666 (because of problems with the built-in one) was declared to return uschar *
5667 instead of char *, causing compiler failure.
5669 25. Fixed a file descriptor leak when processing alias/forward files.
5671 26. Fixed a minor format string issue in dbfn.c.
5673 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5675 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5676 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5679 29. When a sender address is verified, it is cached, to save repeating the test
5680 when there is more than one recipient in a message. However, when the
5681 verification involves a callout, it is possible for different callout
5682 options to be set for different recipients. It is too complicated to keep
5683 track of this in the cache, so now Exim always runs a verification when a
5684 callout is required, relying on the callout cache for the optimization.
5685 The overhead is duplication of the address routing, but this should not be
5688 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5689 to be verified with callout=postmaster, and the main callout worked but the
5690 postmaster check failed, the verification correctly failed. However, if a
5691 subsequent RCPT command asked for sender verification *without* the
5692 postmaster check, incorrect caching caused this verification also to fail,
5695 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5696 it was not caching the DNS options (qualify_single, search_parents) that
5697 were used when the lookup failed. A subsequent lookup with different
5698 options therefore always gave the same answer, though there were cases
5699 where it should not have. (Example: a "domains = !$mx_any" option on a
5700 dnslookup router: the "domains" option is always processed without any
5701 widening, but the router might have qualify_single set.) Now Exim uses the
5702 cached value only when the same options are set.
5704 32. Added John Jetmore's "exipick" utility to the distribution.
5706 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5707 than a timeout (e.g. a certificate is required, and is not provided), an
5708 Exim server now closes the connection immediately. Previously it waited for
5709 the client to close - but if the client is SSL, it seems that they each
5710 wait for each other, leading to a delay before one of them times out.
5712 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5713 maintained 0.8.x compatibility because I don't think many are using it, and
5714 it is clearly obsolete.
5716 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5719 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5720 client certificate was expired. A simple patch fixes this, though I don't
5721 understand the full logic of why the verify callback is called multiple
5724 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5725 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5726 which causes problems with some clients (such as the Certicom SSL Plus
5727 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5728 disables the coutermeasure allowing Eudora to connect."
5730 38. Exim was not checking that a write() to a log file succeeded. This could
5731 lead to Bad Things if a log got too big, in particular if it hit a file
5732 size limit. Exim now panics and dies if it cannot write to a log file, just
5733 as it does if it cannot open a log file.
5735 39. Modified OS/Makefile-Linux so that it now contains
5737 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5739 The two -D definitions ensure that Exim is compiled with large file
5740 support, which makes it possible to handle log files that are bigger than
5743 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5744 instance) a domain was checked against a named list that involved a lookup,
5745 causing $domain_data to be set, then another domain was checked against the
5746 same list, then the first domain was re-checked, the value of $domain_data
5747 after the final check could be wrong. In particular, if the second check
5748 failed, it could be set empty. This bug probably also applied to
5751 41. The strip_trailing_dot option was not being applied to the address given
5752 with the -f command-line option.
5754 42. The code for reading a message's header from the spool was incrementing
5755 $received_count, but never initializing it. This meant that the value was
5756 incorrect (doubled) while delivering a message in the same process in which
5757 it was received. In the most common configuration of Exim, this never
5758 happens - a fresh exec is done - but it can happen when
5759 deliver_drop_privilege is set.
5761 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5762 it now includes up to 150 characters of the unexpected data in the log
5765 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5766 and building data strings. The size of both of these buffers was 10 000
5767 bytes - far larger than anybody would *ever* want, thought I. Needless to
5768 say, somebody hit the limit. I have increased the maximum line length to
5769 20 000 and the maximum data length of concatenated lines to 100 000. I have
5770 also fixed two bugs, because there was no checking on these buffers. Tsk,
5771 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5772 buffer is too small.
5774 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5775 lsearch lookups. Now it does.
5777 46. When parsing a route_list item in a manualroute router, a fixed-length
5778 buffer was used for the list of hosts. I made this 1024 bytes long,
5779 thinking that nobody would ever have a list of hosts that long. Wrong.
5780 Somebody had a whole pile of complicated expansion conditions, and the
5781 string was silently truncated, leading to an expansion error. It turns out
5782 that it is easier to change to an unlimited length (owing to other changes
5783 that have happened since this code was originally written) than to build
5784 structure for giving a limitation error. The length of the item that
5785 expands into the list of hosts is now unlimited.
5787 47. The lsearch lookup could not handle data where the length of text line was
5788 more than 4095 characters. Such lines were truncated, leading to shortened
5789 data being returned. It should now handle lines of any length.
5791 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5792 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5795 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5796 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5797 no longer happens in comment lines. A list of replacements is now placed
5798 at the head of all of the source files, except those whose only change is
5799 to replace PERL_COMMAND in the very first #! line.
5801 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5802 messages on the queue, with a bottom-up merge sort, using code contributed
5803 by Michael Haardt. This should make operations like -bp somewhat faster on
5804 large queues. It won't affect queue runners, except when queue_run_in_order
5807 51. Installed eximstats 1.31 in the distribution.
5809 52. Added support for SRV lookups to the dnslookup router.
5811 53. If an ACL referred to $message_body or $message_body_end, the value was not
5812 reset for any messages that followed in the same SMTP session.
5814 54. The store-handling optimization for building very long strings was not
5815 differentiating between the different store pools. I don't think this
5816 actually made any difference in practice, but I've tidied it.
5818 55. While running the routers to verify a sender address, $sender_address
5819 was still set to the sender address. This is wrong, because when routing to
5820 send a bounce to the sender, it would be empty. Therefore, I have changed
5821 it so that, while verifying a sender address, $sender_address is set to <>.
5822 (There is no change to what happens when verifying a recipient address.)
5824 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5825 target A or AAAA records (if not already returned) without resetting the
5826 qualify_single or search_parents options of the DNS resolver. These are
5827 inappropriate in this case because the targets of MX and SRV records must
5828 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5829 target that, when qualified, matched something in the local domain. These
5830 two options are now turned off when doing these lookups.
5832 57. It seems that at least some releases of Reiserfs (which does not have the
5833 concept of a fixed number of inodes) returns zero and not -1 for the
5834 number of available inodes. This interacted badly with check_spool_inodes,
5835 which assumed that -1 was the "no such thing" setting. What I have done is
5836 to check that the total number of inodes is greater than zero before doing
5837 the test of how many are available.
5839 58. When a "warn" ACL statement has a log_message modifier, the message is
5840 remembered, and not repeated. This is to avoid a lot of repetition when a
5841 message has many recipients that cause the same warning to be written.
5842 However, Exim was preserving the list of already written lines for an
5843 entire SMTP session, which doesn't seem right. The memory is now reset if a
5844 new message is started.
5846 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5847 debugging output unless log_rewrite was also set.
5849 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5850 of (int)(handle) when we know that handle contains (void *)(-1).
5852 61. The Exim daemon panic-logs an error return when it closes the incoming
5853 connection. However "connection reset by peer" seems to be common, and
5854 isn't really an error worthy of noting specially, so that particular error
5857 62. When Exim is trying to find all the local interfaces, it used to panic and
5858 die if the ioctl to get the interface flags failed. However, it seems that
5859 on at least one OS (Solaris 9) it is possible to have an interface that is
5860 included in the list of interfaces, but for which you get a failure error
5861 for this call. This happens when the interface is not "plumbed" into a
5862 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5863 failure of the "get flags" call assumes that the interface is down.
5865 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5866 makes life easier for people who are doing arithmetic on fields extracted
5867 from dates, where you often get leading zeros that should not be
5868 interpreted as octal.
5870 64. Added qualify_domain to the redirect router, to override the global
5873 65. If a pathologically long header line contained very many addresses (the
5874 report of this problem mentioned 10 000) and each of them was rewritten,
5875 Exim could use up a very large amount of memory. (It kept on making new
5876 copies of the header line as it rewrote, and never released the old ones.)
5877 At the expense of a bit more processing, the header rewriting function has
5878 been changed so that it no longer eats memory in this way.
5880 66. The generation of the Received: header has been moved from the time that a
5881 message starts to be received, to the time that it finishes. The timestamp
5882 in the Received: header should now be very close to that of the <= log
5883 line. There are two side-effects of this change:
5885 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5886 logged header lines no longer include the local Received: line, because
5887 it has not yet been created. The same applies to a copy of the message
5888 that is returned to a non-SMTP sender when a message is rejected.
5890 (b) When a filter file is tested using -bf, no additional Received: header
5891 is added to the test message. After some thought, I decided that this
5894 This change does not affect the value of $received_for. It is still set
5895 after address rewriting, but before local_scan() is called.
5897 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5899 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5900 gave an unhelpful panic error message, and a defer error. I have managed to
5901 change this behaviour so that it now rejects any supplied certificate,
5902 which seems right, as the list of acceptable certificates is empty.
5904 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5905 gave an unhelpful defer error. I have not managed to make this reject any
5906 supplied certificates, but the error message it gives is "no certificate
5907 supplied", which is not helpful.
5909 70. exigrep's output now also includes lines that are not associated with any
5910 message, but which match the given pattern. Implemented by a patch from
5911 Martin Sluka, which also tidied up the Perl a bit.
5913 71. Recipient callout verification, like sender verification, was using <> in
5914 the MAIL FROM command. This isn't really the right thing, since the actual
5915 sender may affect whether the remote host accepts the recipient or not. I
5916 have changed it to use the actual sender in the callout; this means that
5917 the cache record is now keyed on a recipient/sender pair, not just the
5918 recipient address. There doesn't seem to be a real danger of callout loops,
5919 since a callout by the remote host to check the sender would use <>.
5920 [SEE ABOVE: changed after hitting problems.]
5922 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5923 temporary errors. However, in the case of such a code being given after
5924 the end of a data transmission (i.e. after ".") Exim was failing to write
5925 a retry record for the message. (Yes, there was some broken host that was
5926 actually sending 8xx at this point.)
5928 73. An unknown lookup type in a host list could cause Exim to panic-die when
5929 the list was checked. (An example that provoked this was putting <; in the
5930 middle of a list instead of at the start.) If this happened during a DATA
5931 ACL check, a -D file could be left lying around. This kind of configuration
5932 error no longer causes Exim to die; instead it causes a defer error. The
5933 incident is still logged to the main and panic logs.
5935 74. Buglet left over from Exim 3 conversion. The message "too many messages
5936 in one connection" was written to the rejectlog but not the mainlog, except
5937 when address rewriting (yes!) was being logged.
5939 75. Added write_rejectlog option.
5941 76. When a system filter was run not as root (that is, when system_filter_user
5942 was set), the values of the $n variables were not being returned to the
5943 main process; thus, they were not subsequently available in the $sn
5946 77. Added +return_path_on_delivery log selector.
5948 78. A connection timeout was being treated differently from recipients deferred
5949 when testing hosts_max_try with a message that was older than the host's
5950 retry timeout. (The host should not be counted, thus allowing all hosts to
5951 be tried at least once before bouncing.) This may have been the cause of an
5952 occasionally reported bug whereby a message would remain on the queue
5953 longer than the retry timeout, but would be bounced if a delivery was
5954 forced. I say "may" because I never totally pinned down the problem;
5955 setting up timeout/retry tests is difficult. See also the next item.
5957 79. The ultimate address timeout was not being applied to errors that involved
5958 a combination of host plus message (for example, a timeout on a MAIL
5959 command). When an address resolved to a number of possible hosts, and they
5960 were not all tried for each delivery (e.g. because of hosts_max_try), a
5961 message could remain on the queue longer than the retry timeout.
5963 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5966 81. Fixed an obscure SMTP outgoing bug which required at least the following
5967 conditions: (a) there was another message waiting for the same server;
5968 (b) the server returned 5xx to all RCPT commands in the first message so
5969 that the message was not completed; (c) the server dropped the connection
5970 or gave a negative response to the RSET that Exim sends to abort the
5971 transaction. The observed case was a dropped connection after DATA that had
5972 been sent in pipelining mode. That is, the server had advertised PIPELINING
5973 but was not implementing it correctly. The effect of the bug was incorrect
5974 behaviour, such as trying another host, and this could lead to a crash.
5980 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5981 and daemon.c were passed as pointers to ints; they should have been
5982 pointers to socklen_t variables (which are typically unsigned ints).
5984 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5987 3. Fixed a really odd bug that affected only the testing scheme; patching a
5988 certain fixed string in the binary changed the value of another string that
5989 happened to be identical to the end of the original first string.
5991 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5992 name", it returns that address as the IP address. On some operating
5993 systems (e.g. Solaris), it also passes back the IP address string as the
5994 "host name". However, on others (e.g. Linux), it passes back an empty
5995 string. Exim wasn't checking for this, and was changing the host name to an
5996 empty string, assuming it had been canonicalized.
5998 5. Although rare, it is permitted to have more than one PTR record for a given
5999 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6000 all the names associated with an address, because they do in Solaris.
6001 However, it seems that they do not in Linux for data that comes from the
6002 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6003 I found this out when I moved to a new Linux workstation and tried to run
6004 the Exim test suite.
6006 To get round this problem I have changed the code so that it now does its
6007 own call to the DNS to look up PTR records when searching for a host name.
6008 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6009 addresses that are only in /etc/hosts are still found.
6011 This behaviour is, however, controlled by an option called host_lookup_
6012 order, which defaults to "bydns:byaddr". If people want to use the other
6013 order, or indeed, just use one or the other means of lookup, they can
6014 specify it in this variable.
6016 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6017 some operating systems, this comes back from gethostbyaddr() as an empty
6018 string, and this is what Exim used to test for. However, it seems that in
6019 other systems, "." is yielded. Exim now tests for this case too.
6021 7. The values of check_spool_space and check_log_space are now held internally
6022 as a number of kilobytes instead of an absolute number of bytes. If a
6023 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6024 kilobyte. This means that much larger values can be stored.
6026 8. Exim monitor: an attempt to get the action menu when not actually pointing
6027 at a message produces an empty menu entitled "No message selected". This
6028 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6029 no entries in it ("Shell widget menu has zero width and/or height"). So I
6030 have added a single, blank menu entry in this case.
6032 9. Added ${quote_local_part.
6034 10. MIME decoding is now applied to the contents of Subject: header lines when
6037 11. Now that a reference to $sender_host_address automatically causes a reverse
6038 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6039 host lookup before query-style lookups in lists that might use this
6040 variable. This has therefore been abolished, and the "net-" prefix is no
6041 longer necessary for query-style lookups.
6043 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6044 have been a typo for LFLAGS, so it has been changed.
6046 13. The install script calls Exim with "-C /dev/null" in order to find the
6047 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6048 to be output. However, since Exim outputs its version number before the
6049 error, it didn't break the script. It just looked ugly. I fixed this by
6050 always allowing "-C /dev/null" if the caller is root.
6052 14. Ignore overlarge ACL variable number when reading spool file - insurance
6053 against a later release with more variables having written the file.
6055 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6056 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6057 this, as well as the form without the "IPv6" on the front.
6059 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6060 OS/Makefile-Darwin file.
6062 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6063 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6065 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6066 variable. However, some OS use ints for inodes. I've added cast to long int
6067 to get rid of the compiler warning.
6069 19. I had forgotten to lock out "/../" in configuration file names when
6070 ALT_CONFIG_PREFIX was set.
6072 20. Routers used for verification do not need to specify transports. However,
6073 if such a router generated a host list, and callout was configured, Exim
6074 crashed, because it could not find a port number from the (non-existent)
6075 transport. It now assumes port 25 in this circumstance.
6077 21. Added the -t option to exigrep.
6079 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6080 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6081 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6082 them is set, LOOKUP_LSEARCH is forced.
6084 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6086 24. Added sender and host information to the "rejected by local_scan()" log
6087 line; previously there was no indication of these.
6089 25. Added .include_if_exists.
6091 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6092 Linux. It turns out that not all file systems support this. Apparently some
6093 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6094 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6095 not supported on the file descriptor, is now ignored when Exim is trying to
6096 sync a directory. This applies only to Linux.
6098 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6100 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6101 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6104 29. Added support for maildirsize files from supplied patch (modified a bit).
6106 30. The use of :fail: followed by an empty string could lead Exim to respond to
6107 sender verification failures with (e.g.):
6109 550 Verification failed for <xxx>
6110 550 Sender verify failed
6112 where the first response line was missing the '-' that indicates it is not
6113 the final line of the response.
6115 31. The loop for finding the name of the user that called Exim had a hardwired
6116 limit of 10; it now uses the value of finduser_retries, which is used for
6117 all other user lookups.
6119 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6122 33. Exim was neglecting to zero errno before one call of strtol() when
6123 expanding a string and expecting an integer value. On some systems this
6124 resulted in spurious "integer overflow" errors. Also, it was casting the
6125 result into an int without checking.
6127 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6128 did not work. The code looks as if it has *never* worked, though it appears
6129 to have been documented since at least release 1.62. I have made it work.
6131 35. The "timeout_DNS" error in retry rules, also documented since at least
6132 1.62, also never worked. As it isn't clear exactly what this means, and
6133 clearly it isn't a major issue, I have abolished the feature by treating it
6134 as "timeout", and writing a warning to the main and panic logs.
6136 36. The display of retry rules for -brt wasn't always showing the error code
6139 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6140 timeout_connect_A, timeout_connect_MX.
6142 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6143 to the empty sender.
6145 39. The daemon was not analysing the content of -oX till after it had closed
6146 stderr and disconnected from the controlling terminal. This meant that any
6147 syntax errors were only noted on the panic log, and the return code from
6148 the command was 0. By re-arranging the code a little, I've made the
6149 decoding happen first, so such errors now appear on stderr, and the return
6150 code is 1. However, the actual setting up of the sockets still happens in
6151 the disconnected process, so errors there are still only recorded on the
6154 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6155 connections (as happens on some IP stacks) was logged at start up time as
6156 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6157 it from "IPv6 and IPv4", which means that two separate sockets are being
6160 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6161 says whether AF_INET or AF_INET6 was passed as an argument.
6163 42. Exiwhat output was messed up when time zones were included in log
6166 43. Exiwhat now gives more information about the daemon's listening ports,
6167 and whether -tls-on-connect was used.
6169 44. The "port" option of the smtp transport is now expanded.
6171 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6172 silently ignored. Now an error message is written to the main and panic
6175 46. There's a new ACL modifier called "logwrite" which writes to a log file
6176 as soon as it is encountered.
6178 47. Added $local_user_uid and $local_user_gid at routing time.
6180 48. Exim crashed when trying to verify a sender address that was being
6183 49. Exim was recognizing only a space character after ".include". It now also
6184 recognizes a tab character.
6186 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6187 extracting the relevant information from the specification. The man page no
6188 longer contains scrambled data for the -d option, and I've added a section
6189 at the front about calling Exim under different names.
6191 51. Added "extra_headers" argument to the "mail" command in filter files.
6193 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6196 53. Installed eximstats 1.29.
6198 54. Added transport_filter_timeout as a generic transport option.
6200 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6201 Cc: header lines. This was required by RFC 822, but it not required by RFC
6204 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6205 incoming messages that did not have them. Now it does so only if the
6206 message originates locally, that is, if there is no associated remote host
6207 address. When Resent- header lines are present, this applies to the Resent-
6208 lines rather than the non-Resent- lines.
6210 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6211 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6213 58. Messages for configuration errors now include the name of the main
6214 configuration file - useful now that there may be more than one file in a
6215 list (.included file names were always shown).
6217 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6218 for those rare installations that do not start the daemon as root or run it
6219 setuid root. I've cut out the call to initgroups() if the daemon is not
6222 60. The Exim user and group can now be bound into the binary as text strings
6223 that are looked up at the start of Exim's processing.
6225 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6227 62. Added $mailstore_basename variable.
6229 63. Installed patch to sieve.c from Michael Haardt.
6231 64. When Exim failed to open the panic log after failing to open the main log,
6232 the original message it was trying to log was written to stderr and debug
6233 output, but if they were not available (the usual case in production), it
6234 was lost. Now it is written to syslog before the two lines that record the
6235 failures to open the logs.
6237 65. Users' Exim filters run in subprocesses under the user's uid. It is
6238 possible for a "deliver" command or an alias in a "personal" command to
6239 provoke an address rewrite. If logging of address rewriting is configured,
6240 this fails because the process is not running as root or exim. There may be
6241 a better way of dealing with this, but for the moment (because 4.30 needs
6242 to be released), I have disabled address rewrite logging when running a
6243 filter in a non-root, non-exim process.
6249 1. The buildconfig auxiliary program wasn't quoting the value set for
6250 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6251 not defined. This bug was masked in 4.22 by the effect that was fixed in
6254 2. Some messages that were rejected after a message id was allocated were
6255 shown as "incomplete" by exigrep. It no longer does this for messages that
6256 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6258 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6259 have allow_domain_literals set, the ID did not get logged in the <= line.
6260 Domain literals are now always recognized in Message-ID: header lines.
6262 4. The first argument for a ${extract expansion item is the key name or field
6263 number. Leading and trailing spaces in this item were not being ignored,
6264 causing some misleading effects.
6266 5. When deliver_drop_privilege was set, single queue runner processes started
6267 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6268 same command in the process it spins off) were not dropping privilege.
6270 6. When the daemon running as "exim" started a queue runner, it always
6271 re-executed Exim in the spun-off process. This is a waste of effort when
6272 deliver_drop_privilege is set. The new process now just calls the
6273 queue-runner function directly.
6279 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6282 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6283 ignored. Though the use of -oP was forcing the writing of a pid file, it
6284 was always written to the default place.
6286 3. If the message "no IP address found for host xxxx" is generated during
6287 incoming verification, it is now followed by identification of the incoming
6288 connection (so you can more easily find what provoked it).
6290 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6292 5. Added some features to "harden" Exim a bit more against certain attacks:
6294 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6295 be put in Local/Makefile. This is like the never_users runtime option,
6296 but it cannot be overridden. The default setting is "root".
6298 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6299 prefix string with which any file named in a -C command line option
6302 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6303 is retained for -C and -D only if the caller of Exim is root. Without
6304 it, the exim user may also use -C and -D and retain privilege.
6306 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6307 command line option is disabled.
6309 6. Macro names set by the -D option must start with an upper case letter, just
6310 like macro names defined in the configuration file.
6312 7. Added "dereference=" facility to LDAP.
6314 8. Two instances of the typo "uknown" in the source files are fixed.
6316 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6317 the Configure-Makefile script screwed up while processing it.
6319 10. Incorporated PCRE 4.4.
6321 11. The SMTP synchronization check was not operating right at the start of an
6322 SMTP session. For example, it could not catch a HELO sent before the client
6323 waited for the greeting. There is now a check for outstanding input at the
6324 point when the greeting is written. Because of the duplex, asynchronous
6325 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6326 way, but not yet received, when the check is performed.
6328 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6329 on TCP/IP sockets, because this apparently causes some broken clients to
6332 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6333 unchanged) from the Cygwin maintainer.
6335 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6336 was supported instead of testing for mbx. Effectively a typo.
6338 15. The spa authenticator server code was not checking that the input it
6339 received was valid base64.
6341 16. The debug output line for the "set" modifier in ACLs was not showing the
6342 name of the variable that was being set.
6344 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6346 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6347 lookup on its own. Something else was needed to trigger the lookup. For
6348 example, a match in host_lookup or the need for a host name in a host list.
6349 Now, if $sender_host_name is referenced and the host name has not yet been
6350 looked up, a lookup is performed. If the lookup fails, the variable remains
6351 empty, and $host_lookup_failed is set to "1".
6353 19. Added "eqi" as a case-independent comparison operator.
6355 20. The saslauthd authentication condition could segfault if neither service
6356 nor realm was specified.
6358 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6359 error message that was logged was misleading, and incoming SMTP
6360 connections were dropped. The message is now more accurate, and temporary
6361 errors are given to SMTP connections.
6363 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6364 (except RSET) with a 421 error, until QUIT is received. However, it was
6365 failing to send a response to QUIT.
6367 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6368 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6369 ACL is now run after the helo_try_verify_hosts code.
6371 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6372 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6373 case-independent, so other case variants are also recognized). Apparently
6374 some systems use these upper case variants.
6376 25. If more than two messages were waiting for the same host, and a transport
6377 filter was specified for the transport, Exim sent two messages over the
6378 same TCP/IP connection, and then failed with "socket operation on non-
6379 socket" when it tried to send the third.
6381 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6383 27. The extern definition of crypt16() in expand.c was not being excluded when
6384 the OS had its own crypt16() function.
6386 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6387 as a preferred synonym for return_size_limit, both as an option and as an
6390 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6392 30. Changed the default configuration ACL to relax the local part checking rule
6393 for addresses that are not in any local domains. For these addresses,
6394 slashes and pipe symbols are allowed within local parts, but the sequence
6395 /../ is explicitly forbidden.
6397 31. SPA server authentication was not clearing the challenge buffer before
6400 32. log_message in a "warn" ACL statement was writing to the reject log as
6401 well as to the main log, which contradicts the documentation and doesn't
6402 seem right (because no rejection is happening). So I have stopped it.
6404 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6405 However, I am unable to do any testing of this.
6407 34. Fixed an infelicity in the appendfile transport. When checking directories
6408 for a mailbox, to see if any needed to be created, it was accidentally
6409 using path names with one or more superfluous leading slashes; tracing
6410 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6412 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6413 contents are added to the log line that is written for every discarded
6414 recipient. (Previously a log_message setting was ignored.)
6416 36. The ${quote: operator now quotes the string if it is empty.
6418 37. The install script runs exim in order to find its version number. If for
6419 some reason other than non-existence or emptiness, which it checks, it
6420 could not run './exim', it was installing it with an empty version number,
6421 i.e. as "exim-". This error state is now caught, and the installation is
6424 38. An argument was missing from the function that creates an error message
6425 when Exim fails to connect to the socket for saslauthd authentication.
6426 This could cause Exim to crash, or give a corrupted message.
6428 39. Added isip, isip4, and isip6 to ${if conditions.
6430 40. The ACL variables $acl_xx are now saved with the message, and can be
6431 accessed later in routers, transports, and filters.
6433 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6434 strings in the file are not string-expanded.
6436 42. If a MAIL command specified a SIZE value that was too large to fit into an
6437 int variable, the check against message_size_limit failed. Such values are
6438 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6439 day this will have to be increased, but I don't think I want to be around
6440 when emails are that large.
6447 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6448 iconv() is not standard in FreeBSD.
6450 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6451 IPv6 enabled. The observed symptom was a segmentation fault on return from
6452 the function os_common_find_running_interfaces() in src/os.c.
6454 3. In the check_special_case() function in daemon.c I had used "errno" as an
6455 argument name, which causes warnings on some systems. This was basically a
6456 typo, since it was named "eno" in the comments!
6458 4. The code that waits for the clock to tick (at a resolution of some fraction
6459 of a second) so as to ensure message-id uniqueness was always waiting for
6460 at least one whole tick, when it could have waited for less. [This is
6461 almost certainly not relevant at current processor speeds, where it is
6462 unlikely to ever wait at all. But we try to future-proof.]
6464 5. The function that sleeps for a time interval that includes fractions of a
6465 second contained a race. It did not block SIGALRM between setting the
6466 timer, and suspending (a couple of lines later). If the interval was short
6467 and the sigsuspend() was delayed until after it had expired, the suspension
6468 never ended. On busy systems this could lead to processes getting stuck for
6471 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6472 process, before it forks any delivery processes. The open lookup caching
6473 mechanism meant that the open file or database connection was passed into
6474 the delivery process. The problem was that delivery processes always tidy
6475 up cached lookup data. This could cause a problem for the next delivery
6476 process started by the queue runner, because the external queue runner
6477 process does not know about the closure. So the next delivery process
6478 still has data in the lookup cache. In the case of a file lookup, there was
6479 no problem because closing a file descriptor in a subprocess doesn't affect
6480 the parent. However, if the lookup was caching a connection to a database,
6481 the connection was closed, and the second delivery process was likely to
6482 see errors such as "PGSQL: query failed: server closed the connection
6483 unexpectedly". The problem has been fixed by closing all cached lookups
6484 in a queue runner before running a delivery process.
6486 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6487 seem to have the "const" qualifier which it has on other OS. I've
6490 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6491 *of the same type* (client or server) with the same public name that an
6492 error should be diagnosed.
6494 9. When Exim looked up a host name for an IP address, but failed to find the
6495 original IP address when looking up the host name (a safety check), it
6496 output the message "<ip address> does not match any IP for NULL", which was
6497 confusing, to say the least. The bug was that the host name should have
6498 appeared instead of "NULL".
6500 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6501 user that is built into the binary, and the -C or -D options is used, root
6502 privilege is dropped before the configuration file is read. In addition,
6503 logging is switched to stderr instead of the normal log files. If the
6504 configuration then re-defines the Exim user, the unprivileged environment
6505 is probably not what is expected, so Exim logs a panic warning message (but
6508 However, if deliver_drop_privilege is set, the unprivileged state may well
6509 be exactly what is intended, so the warning has been cut out in that case,
6510 and Exim is allowed to try to write to its normal log files.
6516 1. smtp_return_error_details was not giving details for temporary sender
6517 or receiver verification errors.
6519 2. Diagnose a configuration error if two authenticators have the same public
6522 3. Exim used not to create the message log file for a message until the first
6523 delivery attempt. This could be confusing when incoming messages were held
6524 for policy or load reasons. The message log file is now created at the time
6525 the message is received, and an initial "Received" line is written to it.
6527 4. The automatically generated man page for command line options had a minor
6528 bug that caused no ill effects; however, a more serious problem was that
6529 the procedure for building the man page automatically didn't always
6530 operate. Consequently, release 4.20 contains an out-of-date version. This
6531 shouldn't happen again.
6533 5. When building Exim with embedded Perl support, the script that builds the
6534 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6535 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6537 6. The freeze_tell option was not being used for messages that were frozen on
6538 arrival, either by an ACL or by local_scan().
6540 7. Added the smtp_incomplete_transaction log selector.
6542 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6543 was accepting AUTH without a new EHLO.
6545 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6546 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6549 10. Logging of TCP/IP connections (when configured) now happens in the main
6550 daemon process instead of the child process, so that the TCP/IP connection
6551 count is more accurate (but it can never be perfect).
6553 11. The use of "drop" in a nested ACL was not being handled correctly in the
6554 outer ACL. Now, if condition failure induced by the nested "drop" causes
6555 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6556 or "require"), the connection is dropped.
6558 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6559 that yield "discard" can now be used with an "accept" or a "discard" verb,
6560 but an error is generated for any others (because I can't see a useful way
6561 to define what should happen).
6563 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6564 are now processed in the same way as lines in the Exim configuration file.
6565 In particular, continuation lines are supported.
6567 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6569 15. Added -ti meaning -t -i.
6571 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6572 domains, and warn by logging if others are found.
6574 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6575 returned from GIFCONF when Exim is trying to find the list of interfaces on
6576 a host. The code in os.c has been modified to copy each ifreq to an aligned
6577 structure in all cases.
6579 Also, in some cases, the returned ifreq's were being copied to a 'struct
6580 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6581 means the last couple of bytes of an IPv6 address could be chopped if the
6582 ifreq contained only a normal sockaddr (14 bytes storage).
6584 18. Named domain lists were not supported in the hosts_treat_as_local option.
6585 An entry such as +xxxx was not recognized, and was treated as a literal
6588 19. Ensure that header lines added by a DATA ACL are included in the reject log
6589 if the ACL subsequently rejects the message.
6591 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6592 MD5 (which is deprecated).
6594 21. When testing a filter file using -bf, Exim was writing a message when it
6595 took the sender from a "From " line in the message, but it was not doing so
6596 when it took $return_path from a Return-Path: header line. It now does.
6598 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6599 with a valid header line field name (a series of printing characters
6600 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6602 23. Changed "disc" in the source to "disk" to conform to the documentation and
6603 the book and for uniformity.
6605 24. Ignore Sendmail's -Ooption=value command line item.
6607 25. When execve() failed while trying to run a command in a pipe transport,
6608 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6609 could be confused with a return value of 69 from the command itself. This
6610 has been changed to 127, the value the shell returns if it is asked to run
6611 a non-existent command. The wording for the related log line suggests a
6612 non-existent command as the problem.
6614 26. If received_header_text expands to an empty string, do not add a Received:
6615 header line to the message. (Well, it adds a token one on the spool, but
6616 marks it "old" so that it doesn't get used or transmitted.)
6618 27. Installed eximstats 1.28 (addition of -nt option).
6620 28. There was no check for failure on the call to getsockname() in the daemon
6621 code. This can fail if there is a shortage of resources on the system, with
6622 ENOMEM, for example. A temporary error is now given on failure.
6624 29. Contrary to the C standard, it seems that in some environments, the
6625 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6626 program. Exim now does this explicitly; it affects the formatting of
6627 timestamps using strftime().
6629 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6630 complaints. I've now initialized all the variables, to avoid this.
6632 32. Header lines added by a system filter were not being "seen" during
6633 transport-time rewrites.
6635 33. The info_callback() function passed to OpenSSL is set up with type void
6636 (*)(SSL *, int, int), as described somewhere. However, when calling the
6637 function (actually a macro) that sets it up, the type void(*)() is
6638 expected. I've put in a cast to prevent warnings from picky compilers.
6640 34. If a DNS black list lookup found a CNAME record, but there were no A
6641 records associated with the domain it pointed at, Exim crashed.
6643 35. If a DNS black list lookup returned more than one A record, Exim ignored
6644 all but the first. It now scans all returned addresses if a particular IP
6645 value is being sought. In this situation, the contents of the
6646 $dnslist_value variable are a list of all the addresses, separated by a
6649 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6650 to accept a host name and all its aliases if the forward lookup for any of
6651 them yielded the IP address of the incoming connection. Now it accepts only
6652 those names whose forward lookup yields the correct IP address. Any other
6653 names are discarded. This closes a loophole whereby a rogue DNS
6654 administrator could create reverse DNS records to break through a
6655 wildcarded host restriction in an ACL.
6657 37. If a user filter or a system filter that ran in a subprocess used any of
6658 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6659 the wrong values were passed to the pipe command ($thisaddress had the
6660 value of $0, $0 had the value of $1, etc). This bug was introduced by
6661 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6663 38. Improved the line breaking for long SMTP error messages from ACLs.
6664 Previously, if there was no break point between 40 and 75 characters, Exim
6665 left the rest of the message alone. Two changes have been made: (a) I've
6666 reduced the minimum length to 35 characters; (b) if it can't find a break
6667 point between 35 and 75 characters, it looks ahead and uses the first one
6668 that it finds. This may give the occasional overlong line, but at least the
6669 remaining text gets split now.
6671 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6672 file descriptors might be low, and that setting 1000 would always raise it.
6673 It turns out that in some environments, the limit is already over 1000 and
6674 that lowering it causes trouble. So now Exim takes care not to decrease it.
6676 40. When delivering a message, the value of $return_path is set to $sender_
6677 address at the start of routing (routers may change the value). By an
6678 oversight, this default was not being set up when an address was tested by
6679 -bt or -bv, which affected the outcome if any router or filter referred to
6682 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6683 log only when "message" or "log_message" are set. However, if one of the
6684 conditions was an address verification, or a call to a nested ACL, the
6685 messages generated by the underlying test were being passed through. This
6686 no longer happens. The underlying message is available in $acl_verify_
6687 message for both "message" and "log_message" expansions, so it can be
6688 passed through if needed.
6690 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6691 new expansion $bh_ to give the encoded byte string without charset
6692 translation. Translation happens only if iconv() is available; HAVE_ICONV
6693 indicates this at build time. HEADERS_CHARSET gives the charset to
6694 translate to; headers_charset can change it in the configuration, and
6695 "headers charset" can change it in an individual filter file.
6697 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6698 that creates RFC 2047 encoded "words" labels them as that charset instead
6699 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6700 expansion operator; (ii) when Exim creates a From: line for a local
6701 message; (iii) when a header line is rewritten to include a "phrase" part.
6703 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6704 buggy, causing it to skip the first lines of messages whose message ID
6705 ended in 'D'. This would not have bitten before Exim release 4.14, because
6706 message IDs were unlikely to end in 'D' before then. The effect was to have
6707 incorrect size information for certain domains.
6709 45. #include "config.h" was missing at the start of the crypt16.c module. This
6710 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6713 46. If there was a timeout during a "random" callout check, Exim treated it as
6714 a failure of the random address, and carried on sending RSET and the real
6715 address. If the delay was just some slowness somewhere, the response to the
6716 original RCPT would be taken as a response to RSET and so on, causing
6717 mayhem of various kinds.
6719 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6720 when I implemented it. It didn't allow for the fact that some option values
6721 may legitimately be negative (e.g. size_addition), and it didn't even do
6722 the right test for positive values.
6724 48. Domain names in DNS records are case-independent. Exim always looks them up
6725 in lower case. Some resolvers return domain names in exactly the case they
6726 appear in the zone file, that is, they may contain uppercase letters. Not
6727 all resolvers do this - some return always lower case. Exim was treating a
6728 change of case by a resolver as a change of domain, similar to a widening
6729 of a domain abbreviation. This triggered its re-routing code and so it was
6730 trying to route what was effectively the same domain again. This normally
6731 caused routing to fail (because the router wouldn't handle the domain
6732 twice). Now Exim checks for this case specially, and just changes the
6733 casing of the domain that it ultimately uses when it transmits the message
6736 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6739 50. If a filter generated a file delivery with a non-absolute name (possible if
6740 no home directory exists for the router), the forbid_file option was not
6743 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6744 the existing equality matching.
6746 52. Exim was using ints instead of ino_t variables in some places where it was
6747 dealing with inode numbers.
6749 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6750 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6751 called TMPDIR, and if it finds it is different, it changes its value.
6753 54. The smtp_printf() function is now made available to local_scan() so
6754 additional output lines can be written before returning. There is also an
6755 smtp_fflush() function to enable the detection of a dropped connection.
6756 The variables smtp_input and smtp_batched_input are exported to
6759 55. Changed the default runtime configuration: the message "Unknown user"
6760 has been removed from the ACL, and instead placed on the localuser router,
6761 using the cannot_route_message feature. This means that any verification
6762 failures that generate their own messages won't get overridden. Similarly,
6763 the "Unrouteable address" message that was in the ACL for unverifiable
6764 relay addresses has also been removed.
6766 56. Added hosts_avoid_esmtp to the smtp transport.
6768 57. The exicyclog script was not checking for the esoteric option
6769 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6770 will work only if exicyclog is run under the appropriate euid.
6772 58. Following a discussion on the list, the rules by which Exim recognises line
6773 endings on incoming messages have been changed. The -dropcr and drop_cr
6774 options are now no-ops, retained only for backwards compatibility. The
6775 following line terminators are recognized: LF CRLF CR. However, special
6776 processing applies to CR:
6778 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6779 nor a local message in the state where . is a terminator.
6781 (ii) If a bare CR is encountered in a header line, an extra space is added
6782 after the line terminator so as not to end the header. The reasoning
6783 behind this is that bare CRs in header lines are most likely either
6784 to be mistakes, or people trying to play silly games.
6786 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6787 was being incorrectly given as 18 bytes larger than it should have been.
6788 This is a VOB (very old bug).
6790 60. This may never have affected anything current, but just in case it has:
6791 When the local host is found other than at the start of a list of hosts,
6792 the local host, those with the same MX, and any that follow, are discarded.
6793 When the list in question was part of a longer list of hosts, the following
6794 hosts (not currently being processed) were also being discarded. This no
6795 longer happens. I'm not sure if this situation could ever has previously
6798 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6801 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6802 header. This is something that is recommended in a new Internet Draft, and
6803 is something that is documented as being done by Sendmail. There are two
6804 possible values. For messages generated by the autoreply transport, Exim
6807 Auto-Submitted: auto-replied
6809 whereas for all other generated messages (e.g. bounces) it adds
6811 Auto-Submitted: auto-generated
6813 63. The "personal" condition in filters now includes a test for the
6814 Auto-Submitted: header. If it contains the string "auto-" the message it
6815 not considered personal.
6817 64. Added rcpt_include_affixes as a generic transport option.
6819 65. Added queue_only_override (default true).
6821 66. Added the syslog_duplication option.
6823 67. If what should have been the first header line of a message consisted of
6824 a space followed by a colon, Exim was mis-interpreting it as a header line.
6825 It isn't of course - it is syntactically invalid and should therefore be
6826 treated as the start of the message body. The misbehaviour could have
6827 caused a number of strange effects, including loss of data in subsequent
6828 header lines, and spool format errors.
6830 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6831 client host had authenticated. This control can now be exercised by an ACL
6832 for more flexibility.
6834 69. By default, callouts do not happen when testing with -bh. There is now a
6835 variant, -bhc, which does actually run the callout code, including
6836 consulting and updating the callout cache.
6838 70. Added support for saslauthd authentication, courtesy of Alexander
6841 71. If statvfs() failed on the spool or log directories while checking their
6842 size for availability, Exim confusingly gave the error "space shortage".
6843 Furthermore, in debugging mode it crashed with a floating point exception.
6844 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6845 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6846 serious problem, Exim now writes to the main and panic logs when this
6847 happens, with details of the failure. It then refuses to accept the
6848 incoming message, giving the message "spool directory problem" or "log
6849 directory problem" with a 421 code for SMTP messages.
6851 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6852 0, 1, and 2 exist, because some OS complain for execs without them (see
6853 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6854 descriptors. However, the code omitted to check that the open succeeded,
6855 causing mysterious errors if for some reason the permissions on /dev/null
6856 got screwed. Now Exim writes a message to the main and panic logs, and
6857 bombs out if it can't open /dev/null.
6859 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6860 interact so that it is all more flexible. It is supposed to remain
6861 backwards compatible. Also added extra_local_interfaces.
6863 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6864 to bomb out with an assertion failure - to the client this appears as a
6865 connection drop. This problem occurs in the part of the code that was taken
6866 from the Samba project. Fortunately, the assertion is in a very simple
6867 function, so I have fixed this by reproducing the function inline in the
6868 one place where it is called, and arranging for authentication to fail
6869 instead of killing the process with assert().
6871 75. The SPA client code was not working when the server requested OEM rather
6872 than Unicode encoding.
6874 76. Added code to make require_files with a specific uid setting more usable in
6875 the case where statting the file as root fails - usually a non-root-mounted
6876 NFS file system. When this happens and the failure is EACCES, Exim now
6877 forks a subprocess and does the per-uid checking as the relevant uid.
6879 77. Added process_log_path.
6881 78. If log_file_path was not explicitly set, a setting of check_log_space or
6882 check_log_inodes was ignored.
6884 79. If a space check for the spool or log partitions fails, the incident is now
6885 logged. Of course, in the latter case the data may get lost...
6887 80. Added the %p formatting code to string_format() so that it can be used to
6888 print addresses in debug_print(). Adjusted all the address printing in the
6889 debugging in store.c to use %p rather than %d.
6891 81. There was a concern that a line of code in smtp_in.c could overflow a
6892 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6893 initially expressed, the concern was not well-founded, because trailing
6894 spaces are removed early. However, if the trailing spaces were followed by
6895 a NULL, they did not get removed, so the overflow was possible. Two fixes
6898 (a) I re-wrote the offending code in a cleaner fashion.
6899 (b) If an incoming SMTP command contains a NULL character, it is rejected
6902 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6903 runs initgroups(), so that if the Exim user is in any additional groups,
6904 they will be used during message reception.
6910 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob