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.
10 Security Release including all fixes in 4.89..4.89+fixes.
12 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
14 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
15 Disable the session-cache too, which might reduce our load. Since we
16 currrectly use a new context for every connection, both as server and
17 client, there is no benefit for these.
18 GnuTLS appears to not support tickets server-side by default (we don't
19 call gnutls_session_ticket_enable_server()) but client side is enabled
20 by default on recent versions (3.1.3 +) unless the PFS priority string
23 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
24 the check for any unsuccessful recipients did not notice the limit, and
25 erroneously found still-pending ones.
27 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
28 compatible one, to avoid the (poorly documented) possibility of a config
29 file in the working directory redirecting the DB files, possibly correpting
30 some existing file. CVE-2017-10140 assigned for BDB.
32 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
33 cache-hot. Previously, although the result was properly cached, the
34 initial verify call returned a defer.
36 JH/21 Bug 2151 (partial):
37 Avoid using SIZE on the MAIL for a callout verify, on any but
38 the main verify for receipient in uncached-mode.
40 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
41 the right size to place the terminating semicolon on its own folded
42 line, the header hash was calculated to an incorrect value thanks to
43 the (relaxed) space the fold became.
45 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
46 which could crash as a result. This could lead to undeliverable messages.
48 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
49 are unsuable for non-message-specific reasons - eg. connection timeout,
50 banner-time rejection.
52 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
53 matters on fast-turnover and PID-randomising systems, which were getting
54 out-of-order delivery.
56 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
57 a possibly-overlapping copy. The symptom was that "Remote host closed
58 connection in response to HELO" was logged instead of the actual 4xx
61 JH/34 Bug 2199: fix a use-after-free while reading smtp input for header lines.
62 A crafted sequence of BDAT commands could result in in-use memory beeing
63 freed. CVE-2017-16943.
65 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
66 from SMTP input. Previously it was always done; now only done for DATA
67 and not BDAT commands. CVE-2017-16944.
73 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
74 than -2003 did; needs libidn2 in addition to libidn.
76 JH/02 The path option on a pipe transport is now expanded before use.
78 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
79 Patch provided by "Björn", documentation fix added too.
81 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
82 missing a wire-to-host endian conversion.
84 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
85 close after a BDAT command line could be taken as a following command,
86 giving a synch failure. Fix by only checking for synch immediately
87 before acknowledging the chunk.
89 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
90 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
91 macro. Patches provided by Josh Soref.
93 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
94 Previously we did not; the RFC seems ambiguous and VRFY is not listed
95 by IANA as a service extension. However, John Klensin suggests that we
98 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
99 the dkim code may be unix-mode line endings rather than smtp wire-format
100 CRLF, so prepend a CR to any bare LF.
102 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
103 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
105 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
106 the first were themselves being wrongly included in the feed into dkim
107 processing; with most chunk sizes in use this resulted in an incorrect
108 body hash calculated value.
110 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
111 DKIM signature block, for verification. Although advised against by
112 standards it is specifically not ruled illegal.
114 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
116 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
117 missing a body hash (the bh= tag).
119 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
120 It seems that HAProxy sends the Proxy Protocol information in clear and
121 only then does a TLS startup, so do the same.
123 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
124 TCP connections (such as for Spamd) unless the daemon successfully set
125 Fast Open mode on its listening sockets. This fixes breakage seen on
126 too-old kernels or those not configured for Fast Open, at the cost of
127 requiring both directions being enabled for TFO, and TFO never being used
128 by non-daemon-related Exim processes.
130 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
131 endings, at least on the first header line. Try to canonify any that get
132 past that check, despite the cost.
134 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
135 now limited to an arbitrary five deep, while parsing addresses with the
136 strip_excess_angle_brackets option enabled.
138 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
139 instead leave the unprompted TLS handshake in socket buffer for the
140 TLS library to consume.
142 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
144 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
146 JH/16 Drop variables when they go out of scope. Memory management drops a whole
147 region in one operation, for speed, and this leaves assigned pointers
148 dangling. Add checks run only under the testsuite which checks all
149 variables at a store-reset and panics on a dangling pointer; add code
150 explicitly nulling out all the variables discovered. Fixes one known
151 bug: a transport crash, where a dangling pointer for $sending_ip_address
152 originally assigned in a verify callout, is re-used.
154 PP/06 Drop '.' from @INC in various Perl scripts.
156 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
158 PP/08 Reduce a number of compilation warnings under clang; building with
159 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
160 should be warning-free.
162 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
164 HS/01 Fix portability problems introduced by PP/08 for platforms where
165 realloc(NULL) is not equivalent to malloc() [SunOS et al].
167 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
168 chunk. This allows us to accept broken chunked messages. We need a more
169 general solution here.
171 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
172 already-broken messages in the queue.
174 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
176 JH/19 Fix reference counting bug in routing-generated-address tracking.
182 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
183 supports it and a size is available (ie. the sending peer gave us one).
185 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
186 years of being deprecated). The replacements are the ACLs
187 acl_smtp_mime and acl_not_smtp_mime.
189 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
190 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
191 or even an in-clear connection were permitted. Now, if the host lookup
192 was dnssec and dane was requested then the host is only used if the
193 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
194 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
195 if one fails this test.
196 This means that a poorly-configured remote DNS will make it incommunicado;
197 but it protects against a DNS-interception attack on it.
199 JH/04 Bug 1810: make continued-use of an open smtp transport connection
200 non-noisy when a race steals the message being considered.
202 JH/05 If main configuration option tls_certificate is unset, generate a
203 self-signed certificate for inbound TLS connections.
205 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
206 in rewrites and routers.
208 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
209 and logged a warning sing 4.83; now they are a configuration file error.
211 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
212 (lacking @domain). Apply the same qualification processing as RCPT.
214 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
216 JH/10 Support ${sha256:} applied to a string (as well as the previous
219 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
220 a cutthrough deliver is pending, as we always want to make a connection.
221 This also avoids re-routing the message when later placing the cutthrough
222 connection after a verify cache hit.
223 Do not update it with the verify result either.
225 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
226 when routing results in more than one destination address.
228 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
229 signing (which inhibits the cutthrough capability). Previously only
230 the presence of an option was tested; now an expansion evaluating as
231 empty is permissible (obviously it should depend only on data available
232 when the cutthrough connection is made).
234 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
235 the relevant preceding SMTP command did not note the pipelining mode.
237 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
238 Previously they were not counted.
240 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
241 as one having no matching records. Previously we deferred the message
242 that needed the lookup.
244 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
245 distinguished as "(=".
247 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
248 for missing MX records. Previously it only worked for missing A records.
250 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
252 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
253 after the data-go-ahead and data-ack. Patch from Jason Betts.
255 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
256 even for a "none" policy. Patch from Tony Meyer.
258 JH/22 Fix continued use of a connection for further deliveries. If a port was
259 specified by a router, it must also match for the delivery to be
262 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
263 When one of the recipients of a message was unsuitable for the connection
264 (has no matching addresses), we lost track of needing to mark it
265 deferred. As a result mail would be lost.
267 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
269 JH/25 Decoding ACL controls is now done using a binary search; the source code
270 takes up less space and should be simpler to maintain. Merge the ACL
271 condition decode tables also, with similar effect.
273 JH/26 Fix problem with one_time used on a redirect router which returned the
274 parent address unchanged. A retry would see the parent address marked as
275 delivered, so not attempt the (identical) child. As a result mail would
278 JH/27 Fix a possible security hole, wherein a process operating with the Exim
279 UID can gain a root shell. Credit to http://www.halfdog.net/ for
280 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
283 JH/28 Enable {spool,log} filesystem space and inode checks as default.
284 Main config options check_{log,spool}_{inodes,space} are now
285 100 inodes, 10MB unless set otherwise in the configuration.
287 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
288 Previously it only applied to the main-section connection policy
291 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
293 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
294 by me. Added RFC7919 DH primes as an alternative.
296 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
297 are not in the system include path.
299 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
300 GnuTLS, when a session startup failed (eg because the client disconnected)
301 Exim did stdio operations after fclose. This was exposed by a recent
302 change which nulled out the file handle after the fclose.
304 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
305 signed directly by the cert-signing cert, rather than an intermediate
306 OCSP-signing cert. This is the model used by LetsEncrypt.
308 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
310 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
311 an incoming connection.
313 HS/02 Bug 1802: Do not half-close the connection after sending a request
316 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
317 fallback to "prime256v1".
319 JH/34 SECURITY: Use proper copy of DATA command in error message.
320 Could leak key material. Remotely exploitable. CVE-2016-9963.
326 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
327 and 3.4.4 - once the server is enabled to respond to an OCSP request
328 it does even when not requested, resulting in a stapling non-aware
329 client dropping the TLS connection.
331 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
332 support variable-length bit vectors. No functional change.
334 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
335 The I= interface field on outgoing lines is now after the H= remote
336 host field, same as incoming lines. There is a separate
337 outgoing_interface log selector which allows you to disable the
340 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
341 If not running log_selector +smtp_connection the mainlog would be held
342 open indefinitely after a "too many connections" event, including to a
343 deleted file after a log rotate. Leave the per net connection logging
344 leaving it open for efficiency as that will be quickly detected by the
345 check on the next write.
347 HS/01 Bug 1671: Fix post transport crash.
348 Processing the wait-<transport> messages could crash the delivery
349 process if the message IDs didn't exist for some reason. When
350 using 'split_spool_directory=yes' the construction of the spool
351 file name failed already, exposing the same netto behaviour.
353 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
354 mime_regex ACL conditions.
356 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
357 to DSN fail messages (bounces): remote IP, remote greeting, remote response
358 to HELO, local diagnostic string.
360 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
361 log line to debug. Even when configured with a tls authenticator many
362 client connections are expected to not authenticate in this way, so
363 an authenticate fail is not an error.
365 HS/02 Add the Exim version string to the process info. This way exiwhat
366 gives some more detail about the running daemon.
368 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
369 matter for fast-change records such as DNSBLs.
371 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
372 retry record, even if constant. There may be multiple transports with
373 different interface settings and the retry behaviour needs to be kept
376 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
378 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
380 JH/10 Bug 840: fix log_defer_output option of pipe transport
382 JH/11 Bug 830: use same host for all RCPTS of a message, even under
383 hosts_randomize. This matters a lot when combined with mua_wrapper.
385 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
386 ${quote_pgsql:<string>} operator.
388 JH/13 Bug 1708: avoid misaligned access in cached lookup.
390 JH/14 Change header file name for freeradius-client. Relevant if compiling
391 with Radius support; from the Gentoo tree and checked under Fedora.
393 JH/15 Bug 1712: Introduce $prdr_requested flag variable
395 JH/16 Bug 1714: Permit an empty string as expansion result for transport
396 option transport_filter, meaning no filtering.
398 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
400 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
401 defaults to "*" (all hosts). The variable is now available when not built
402 with TLS, default unset, mainly to enable keeping the testsuite sane.
403 If a server certificate is not supplied (via tls_certificate) an error is
404 logged, and clients will find TLS connections fail on startup. Presumably
405 they will retry in-clear.
406 Packagers of Exim are strongly encouraged to create a server certificate
407 at installation time.
409 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
410 with the $config_file variable.
412 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
413 in transport context, after the attempt, and per-recipient. The latter type
414 is per host attempted. The event data is the error message, and the errno
415 information encodes the lookup type (A vs. MX) used for the (first) host,
416 and the trailing two digits of the smtp 4xx response.
418 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
419 to write to mainlog (or rejectlog, paniclog) in the window between file
420 creation and permissions/ownership being changed. Particularly affects
421 installations where exicyclog is run as root, rather than exim user;
422 result is that the running daemon panics and dies.
424 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
426 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
427 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
428 "pri" and "weight". Note that the previous implicit priority given by the
429 list order is no longer honoured.
431 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
434 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
435 by defining SUPPORT_SOCKS.
437 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
438 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
439 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
440 variables are renamed to proxy_{local,external}_{address,port}.
442 JH/27 Move Internationalisation support from Experimental to mainline, enabled
443 for a build by defining SUPPORT_I18N
445 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
446 of the query string, and make ${quote_redis:} do that quoting.
448 JH/29 Move Events support from Experimental to mainline, enabled by default
449 and removable for a build by defining DISABLE_EVENT.
451 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
453 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
454 cached by the daemon.
456 JH/32 Move Redis support from Experimental to mainline, enabled for a build
457 by defining LOOKUP_REDIS. The libhiredis library is required.
459 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
460 keys are given for lookup.
462 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
463 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
464 only supported when built with TLS support. The PolarSSL SHA routines
465 are still used when the TLS library is too old for convenient support.
467 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
468 openssl_options), for security. OpenSSL forces this from version 1.1.0
469 server-side so match that on older versions.
471 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
472 allocation for $value could be released as the expansion processing
473 concluded, but leaving the global pointer active for it.
475 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
476 and to use the domains and local_parts ACL conditions.
478 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
479 incorrectly not doubled on cutthrough transmission, hence seen as a
480 body-termination at the receiving system - resulting in truncated mails.
481 Commonly the sender saw a TCP-level error, and retransmitted the message
482 via the normal store-and-forward channel. This could result in duplicates
483 received - but deduplicating mailstores were liable to retain only the
484 initial truncated version.
486 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
488 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
490 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
491 we're in there, support oversigning also; bug 1309.
493 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
495 HS/04 Add support for keep_environment and add_environment options.
497 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
498 either intentional arithmetic overflow during PRNG, or testing config-
501 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
502 delivery resulted in actual delivery. Cancel cutthrough before DATA
505 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
506 rejects a recipient: pass the reject to the originator.
508 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
509 Many were false-positives and ignorable, but it's worth fixing the
512 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
513 for the new environment-manipulation done at startup. Move the routines
514 from being local to tls.c to being global via the os.c file.
516 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
517 an extract embedded as result-arg for a map, the first arg for extract
518 is unavailable so we cannot tell if this is a numbered or keyed
519 extraction. Accept either.
525 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
528 JH/02 The smtp transport option "multi_domain" is now expanded.
530 JH/03 The smtp transport now requests PRDR by default, if the server offers
533 JH/04 Certificate name checking on server certificates, when exim is a client,
534 is now done by default. The transport option tls_verify_cert_hostnames
535 can be used to disable this per-host. The build option
536 EXPERIMENTAL_CERTNAMES is withdrawn.
538 JH/05 The value of the tls_verify_certificates smtp transport and main options
539 default to the word "system" to access the system default CA bundle.
540 For GnuTLS, only version 3.0.20 or later.
542 JH/06 Verification of the server certificate for a TLS connection is now tried
543 (but not required) by default. The verification status is now logged by
544 default, for both outbound TLS and client-certificate supplying inbound
547 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
550 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
551 Status Notification (bounce) messages are now MIME format per RFC 3464.
552 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
553 under the control of the dsn_advertise_hosts option, and routers may
554 have a dsn_lasthop option.
556 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
557 default, modifiable by a malware= option. The list separator for
558 the options can now be changed in the usual way. Bug 68.
560 JH/10 The smtp_receive_timeout main option is now expanded before use.
562 JH/11 The incoming_interface log option now also enables logging of the
563 local interface on delivery outgoing connections.
565 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
566 if the interface and destination host and port all match.
568 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
571 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
572 Patch from Andrew Lewis.
574 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
575 now supports optional time-restrictions, weighting, and priority
576 modifiers per server. Patch originally by <rommer@active.by>.
578 JH/16 The spamd_address main option now supports a mixed list of local
579 and remote servers. Remote servers can be IPv6 addresses, and
580 specify a port-range.
582 JH/17 Bug 68: The spamd_address main option now supports an optional
583 timeout value per server.
585 JH/18 Bug 1581: Router and transport options headers_add/remove can
586 now have the list separator specified.
588 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
591 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
594 JH/21 Support for the A6 type of dns record is withdrawn.
596 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
597 rather than the verbs used.
599 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
600 from 255 to 1024 chars.
602 JH/24 Verification callouts now attempt to use TLS by default.
604 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
605 are generic router options now. The defaults didn't change.
607 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
608 Original patch from Alexander Shikoff, worked over by JH.
610 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
611 files if ZCAT_COMMAND is not executable.
613 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
615 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
617 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
618 Normally benign, it bites when the pair was led to by a CNAME;
619 modern usage is to not canonicalize the domain to a CNAME target
620 (and we were inconsistent anyway for A-only vs AAAA+A).
622 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
624 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
625 when evaluating $sender_host_dnssec.
627 JH/31 Check the HELO verification lookup for DNSSEC, adding new
628 $sender_helo_dnssec variable.
630 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
632 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
634 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
636 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
637 documented as working, but never had. Support all but $spam_report.
639 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
640 added for tls authenticator.
642 HS/03 Add perl_taintmode main config option
648 TL/01 When running the test suite, the README says that variables such as
649 no_msglog_check are global and can be placed anywhere in a specific
650 test's script, however it was observed that placement needed to be near
651 the beginning for it to behave that way. Changed the runtest perl
652 script to read through the entire script once to detect and set these
653 variables, reset to the beginning of the script, and then run through
654 the script parsing/test process like normal.
656 TL/02 The BSD's have an arc4random API. One of the functions to induce
657 adding randomness was arc4random_stir(), but it has been removed in
658 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
659 function when detected.
661 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
662 cause callback expansion.
664 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
665 syntax errors in an expansion can be treated as a string instead of
666 logging or causing an error, due to the internal use of bool_lax
667 instead of bool when processing it.
669 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
670 server certificates when making smtp deliveries.
672 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
674 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
676 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
678 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
679 Merged patch from Sebastian Wiedenroth.
681 JH/05 Fix results-pipe from transport process. Several recipients, combined
682 with certificate use, exposed issues where response data items split
683 over buffer boundaries were not parsed properly. This eventually
684 resulted in duplicates being sent. This issue only became common enough
685 to notice due to the introduction of connection certificate information,
686 the item size being so much larger. Found and fixed by Wolfgang Breyha.
688 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
689 size buffer was used, resulting in syntax errors when an expansion
692 JH/07 Add support for directories of certificates when compiled with a GnuTLS
693 version 3.3.6 or later.
695 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
696 is EXPERIMENTAL_EVENT, the main-configuration and transport options
697 both become "event_action", the variables become $event_name, $event_data
698 and $event_defer_errno. There is a new variable $verify_mode, usable in
699 routers, transports and related events. The tls:cert event is now also
700 raised for inbound connections, if the main configuration event_action
703 TL/06 In test suite, disable OCSP for old versions of openssl which contained
704 early OCSP support, but no stapling (appears to be less than 1.0.0).
706 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
707 server certificate names available under the smtp transport option
708 "tls_verify_cert_hostname" now do not permit multi-component wildcard
711 JH/10 Time-related extraction expansions from certificates now use the main
712 option "timezone" setting for output formatting, and are consistent
713 between OpenSSL and GnuTLS compilations. Bug 1541.
715 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
716 encoded parameter in the incoming message. Bug 1558.
718 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
719 include certificate info, eximon was claiming there were spoolfile
722 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
724 JH/14 Log delivery-related information more consistently, using the sequence
725 "H=<name> [<ip>]" wherever possible.
727 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
728 are problematic for Debian distribution, omit them from the release
731 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
733 JH/16 Fix string representation of time values on 64bit time_t architectures.
736 JH/17 Fix a null-indirection in certextract expansions when a nondefault
737 output list separator was used.
742 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
743 checkers that were complaining about end of non-void function with no
746 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
747 This was a regression introduced in 4.83 by another bugfix.
749 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
751 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
752 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
758 TF/01 Correctly close the server side of TLS when forking for delivery.
760 When a message was received over SMTP with TLS, Exim failed to clear up
761 the incoming connection properly after forking off the child process to
762 deliver the message. In some situations the subsequent outgoing
763 delivery connection happened to have the same fd number as the incoming
764 connection previously had. Exim would try to use TLS and fail, logging
765 a "Bad file descriptor" error.
767 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
768 utilities have not been installed.
770 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
771 temporary space as the ACL may create new global variables.
773 TL/01 LDAP support uses per connection or global context settings, depending
774 upon the detected version of the libraries at build time.
776 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
777 to extract and use the src ip:port in logging and expansions as if it
778 were a direct connection from the outside internet. PPv2 support was
779 updated based on HAProxy spec change in May 2014.
781 JH/02 Add ${listextract {number}{list}{success}{fail}}.
783 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
784 Properly escape header and check for NULL return.
786 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
789 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
791 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
792 characters in header names, implemented as a verify condition.
793 Contributed by Michael Fischer v. Mollard.
795 TL/05 Rename SPF condition results err_perm and err_temp to standardized
796 results permerror and temperror. Previous values are deprecated but
797 still accepted. In a future release, err_perm and err_temp will be
798 completely removed, which will be a backward incompatibility if the
799 ACL tests for either of these two old results. Patch contributed by
800 user bes-internal on the mailing list.
802 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
804 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
805 selectors, in both main and reject logs.
807 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
810 JH/07 Add malware type "sock" for talking to simple daemon.
812 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
814 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
815 routers/transports under cutthrough routing.
817 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
818 numbers. Touch up "bool" conditional to keep the same definition.
820 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
822 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
824 JH/12 Expand items in router/transport headers_add or headers_remove lists
825 individually rather than the list as a whole. Bug 1452.
827 Required for reasonable handling of multiple headers_ options when
828 they may be empty; requires that headers_remove items with embedded
829 colons must have them doubled (or the list-separator changed).
831 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
832 view the policy declared in the DMARC record. Currently, $dmarc_status
833 is a combined value of both the record presence and the result of the
836 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
838 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
839 dnslookup router and the smtp transport (applying to the forward
842 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
843 of ldap servers used for a specific lookup. Patch provided by Heiko
846 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
847 New variable $lookup_dnssec_authenticated for observability.
849 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
850 Patch submitted by Lars Timman.
852 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
854 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
855 Requires trusted mode and valid format message id, aborts otherwise.
856 Patch contributed by Heiko Schlichting.
858 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
859 certextract with support for various fields. Bug 1358.
861 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
862 is requested by default, modifiable by smtp transport option
865 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
866 operate on certificate variables to give certificate fingerprints
867 Also new ${sha256:cert_variable}.
869 JH/23 The PRDR feature is moved from being Experimental into the mainline.
871 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
872 Christian Aistleitner.
874 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
876 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
877 file. Patch from Wolfgang Breyha.
879 JH/25 Expand the coverage of the delivery $host and $host_address to
880 client authenticators run in verify callout. Bug 1476.
882 JH/26 Port service names are now accepted for tls_on_connect_ports, to
883 align with daemon_smtp_ports. Bug 72.
885 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
886 support and error reporting did not work properly.
888 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
889 and is readable. Patch from Andrew Colin Kissa.
891 TL/14 Enhance documentation of ${run expansion and how it parses the
892 commandline after expansion, particularly in the case when an
893 unquoted variable expansion results in an empty value.
895 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
897 PP/02 Fix internal collision of T_APL on systems which support RFC3123
898 by renaming away from it. Addresses GH issue 15, reported by
901 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
903 TL/15 SECURITY: prevent double expansion in math comparison functions
904 (can expand unsanitized data). Not remotely exploitable.
911 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
913 PP/02 Make -n do something, by making it not do something.
914 When combined with -bP, the name of an option is not output.
916 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
919 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
920 $sender_host_name and config options to manage this, and basic check
923 PP/05 DSCP support for outbound connections and control modifier for inbound.
925 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
926 (Only plugin which currently uses this is kerberos4, which nobody should
927 be using, but we should make it available and other future plugins might
928 conceivably use it, even though it would break NAT; stuff *should* be
929 using channel bindings instead).
931 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
932 name; added for Sendmail compatibility; requires admin caller.
933 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
934 just ignore it); requires trusted caller.
935 Also parse but ignore: -Ac -Am -X<logfile>
938 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
940 TL/02 Add +smtp_confirmation as a default logging option.
942 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
943 Patch by Magnus Holmgren from 2007-02-20.
945 TL/04 Bugzilla 1281 - Spec typo.
946 Bugzilla 1283 - Spec typo.
947 Bugzilla 1290 - Spec grammar fixes.
949 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
951 TL/06 Add Experimental DMARC support using libopendmarc libraries.
953 TL/07 Fix an out of order global option causing a segfault. Reported to dev
954 mailing list by by Dmitry Isaikin.
956 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
958 JH/02 Support "G" suffix to numbers in ${if comparisons.
960 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
962 NM/01 Bugzilla 1197 - Spec typo
963 Bugzilla 1196 - Spec examples corrections
965 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
967 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
968 gnutls_enable_pkcs11, but renamed to more accurately indicate its
971 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
972 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
974 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
975 "acl {{name}{arg}...}", and optional args on acl condition
978 JH/05 Permit multiple router/transport headers_add/remove lines.
980 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
982 JH/07 Avoid using a waiting database for a single-message-only transport.
983 Performance patch from Paul Fisher. Bugzilla 1262.
985 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
988 JH/09 Add $headers_added variable, with content from use of ACL modifier
989 add_header (but not yet added to the message). Bugzilla 199.
991 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
992 Pulled from Bugzilla 817 by Wolfgang Breyha.
994 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
996 (nb: this is the same fix as in Exim 4.80.1)
998 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1001 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1004 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1006 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1007 advertise SMTP AUTH mechanism to us, instead of a generic
1008 protocol violation error. Also, make Exim more robust to bad
1009 data from the Dovecot auth socket.
1011 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1013 When a queue runner is handling a message, Exim first routes the
1014 recipient addresses, during which it prunes them based on the retry
1015 hints database. After that it attempts to deliver the message to
1016 any remaining recipients. It then updates the hints database using
1019 So if a recipient address works intermittently, it can get repeatedly
1020 deferred at routing time. The retry hints record remains fresh so the
1021 address never reaches the final cutoff time.
1023 This is a fairly common occurrence when a user is bumping up against
1024 their storage quota. Exim had some logic in its local delivery code
1025 to deal with this. However it did not apply to per-recipient defers
1026 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1028 This change adds a proper retry rule check during routing so that the
1029 final cutoff time is checked against the message's age. We only do
1030 this check if there is an address retry record and there is not a
1031 domain retry record; this implies that previous attempts to handle
1032 the address had the retry_use_local_parts option turned on. We use
1033 this as an approximation for the destination being like a local
1034 delivery, as in LMTP.
1036 I suspect this new check makes the old local delivery cutoff check
1037 redundant, but I have not verified this so I left the code in place.
1039 TF/02 Correct gecos expansion when From: is a prefix of the username.
1041 Test 0254 submits a message to Exim with the header
1045 When I ran the test suite under the user fanf2, Exim expanded
1046 the header to contain my full name, whereas it should have added
1047 a Resent-Sender: header. It erroneously treats any prefix of the
1048 username as equal to the username.
1050 This change corrects that bug.
1052 GF/01 DCC debug and logging tidyup
1053 Error conditions log to paniclog rather than rejectlog.
1054 Debug lines prefixed by "DCC: " to remove any ambiguity.
1056 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1058 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1059 Bug spotted by Jeremy Harris; was flawed since initial commit.
1060 Would have resulted in OCSP responses post-SNI triggering an Exim
1061 NULL dereference and crash.
1063 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1065 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1066 Bug detection, analysis and fix by Samuel Thibault.
1067 Bugzilla 1331, Debian bug #698092.
1069 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1071 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1072 Server implementation by Todd Lyons, client by JH.
1073 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1074 config variable "prdr_enable" controls whether the server
1075 advertises the facility. If the client requests PRDR a new
1076 acl_data_smtp_prdr ACL is called once for each recipient, after
1077 the body content is received and before the acl_smtp_data ACL.
1078 The client is controlled by both of: a hosts_try_prdr option
1079 on the smtp transport, and the server advertisement.
1080 Default client logging of deliveries and rejections involving
1081 PRDR are flagged with the string "PRDR".
1083 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1084 fclose(). Diagnosis by Todd Lyons.
1086 PP/17 Update configure.default to handle IPv6 localhost better.
1087 Patch by Alain Williams (plus minor tweaks).
1090 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1091 This is now consistent with GnuTLS, and is now documented: the
1092 previous undocumented portable approach to treating the option as
1093 unset was to force an expansion failure. That still works, and
1094 an empty string is now equivalent.
1096 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1097 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1098 not performing validation itself.
1100 PP/20 Added force_command boolean option to pipe transport.
1101 Patch from Nick Koston, of cPanel Inc.
1103 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1106 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1108 PP/21 Fix eximon continuous updating with timestamped log-files.
1109 Broken in a format-string cleanup in 4.80, missed when I repaired the
1110 other false fix of the same issue.
1111 Report and fix from Heiko Schlichting.
1114 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1115 Report from Prashanth Katuri.
1117 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1118 It's SecureTransport, so affects any MacOS clients which use the
1119 system-integrated TLS libraries, including email clients.
1121 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1122 using a MIME ACL for non-SMTP local injection.
1123 Report and assistance in diagnosis by Warren Baker.
1125 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1127 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1129 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1130 last id that failed so it may be referenced in subsequent ACL's.
1132 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1135 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1136 ldap library initialization, allowing self-signed CA's to be
1137 used. Also properly sets require_cert option later in code by
1138 using NULL (global ldap config) instead of ldap handle (per
1139 session). Bug diagnosis and testing by alxgomz.
1141 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1142 the src/util/ subdirectory.
1144 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1145 renamed to Transport Post Delivery Action by Jeremy Harris, as
1148 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1149 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1150 redis_servers = needs to be configured which will be used by the redis
1151 lookup. Patch from Warren Baker, of The Packet Hub.
1153 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1155 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1156 hostname or reverse DNS when processing a host list. Used suggestions
1157 from multiple comments on this bug.
1159 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1161 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1162 Missed a few lines, added it to make the runtest require no keyboard
1165 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1166 contains upper case chars. Make router use caseful_local_part.
1168 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1169 support when GnuTLS has been built with p11-kit.
1175 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1177 This, or similar/improved, will also be change PP/11 of 4.82.
1183 PP/01 Handle short writes when writing local log-files.
1184 In practice, only affects FreeBSD (8 onwards).
1185 Bugzilla 1053, with thanks to Dmitry Isaikin.
1187 NM/01 Bugzilla 949 - Documentation tweak
1189 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1192 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1194 PP/02 Implemented gsasl authenticator.
1196 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1198 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1199 `pkg-config foo` for cflags/libs.
1201 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1202 with rest of GSASL and with heimdal_gssapi.
1204 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1205 `pkg-config foo` for cflags/libs for the TLS implementation.
1207 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1208 properties get this fed in as external SSF. A number of robustness
1209 and debugging improvements to the cyrus_sasl authenticator.
1211 PP/08 cyrus_sasl server now expands the server_realm option.
1213 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1214 Patch by Jeremy Harris.
1216 PP/10 Added dbmjz lookup type.
1218 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1220 PP/12 MAIL args handles TAB as well as SP, for better interop with
1221 non-compliant senders.
1222 Analysis and variant patch by Todd Lyons.
1224 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1225 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1226 Patch from Dirk Mueller <dmueller@suse.com>
1228 PP/13 tls_peerdn now print-escaped for spool files.
1229 Observed some $tls_peerdn in wild which contained \n, which resulted
1230 in spool file corruption.
1232 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1233 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1234 or write after TLS renegotiation, which otherwise led to messages
1237 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1238 as a tracking header (ie: a signed header comes before the signature).
1239 Patch from Wolfgang Breyha.
1241 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1242 comma-sep list; embedded commas doubled.
1244 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1246 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1248 Report and patch from Dmitry Banschikov.
1250 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1251 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1252 failures. We appear to now support TLS1.1+ with Exim.
1254 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1255 lets Exim select keys and certificates based upon TLS SNI from client.
1256 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1257 before an outbound SMTP session. New log_selector, +tls_sni.
1259 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1260 NULL dereference. Report and patch from Alun Jones.
1262 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1263 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1264 Not seeing resolver debug output on NetBSD, but suspect this is a
1265 resolver implementation change.
1267 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1268 Left warnings. Added "eximon gdb" invocation mode.
1270 PP/21 Defaulting "accept_8bitmime" to true, not false.
1272 PP/22 Added -bw for inetd wait mode support.
1274 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1275 locate the relevant includes and libraries. Made this the default.
1277 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1278 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1280 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1281 This may cause build issues on older platforms.
1283 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1284 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1285 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1286 Added SNI support via GnuTLS too.
1287 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1289 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1291 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1292 Applied second patch from Janne, implementing suggestion to default
1293 multiple-strings-in-record handling to match SPF spec.
1295 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1297 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1298 read-only, out of scope).
1299 Patch from Wolfgang Breyha, report from Stuart Northfield.
1301 PP/29 Fix three issues highlighted by clang analyser static analysis.
1302 Only crash-plausible issue would require the Cambridge-specific
1303 iplookup router and a misconfiguration.
1304 Report from Marcin Mirosław.
1306 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1308 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1309 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1310 As part of this, removing so much warning spew let me fix some minor
1311 real issues in debug logging.
1313 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1314 assignment on my part. Fixed.
1316 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1317 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1318 Janne Snabb (who went above and beyond: thank you).
1320 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1321 string otherwise requires a connection and a bunch more work and it's
1322 relatively easy to get wrong. Should also expose TLS library linkage
1325 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1326 64-bit ${eval} (JH/03).
1328 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1329 GNU libc to support some of the 64-bit stuff, should not lead to
1330 conflicts. Defined before os.h is pulled in, so if a given platform
1331 needs to override this, it can.
1333 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1334 protection layer was required, which is not implemented.
1335 Bugzilla 1254, patch from Wolfgang Breyha.
1337 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1338 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1339 tls_dhparam take prime identifiers. Also unbreak combination of
1340 OpenSSL+DH_params+TLSSNI.
1342 PP/39 Disable SSLv2 by default in OpenSSL support.
1348 PP/01 Solaris build fix for Oracle's LDAP libraries.
1349 Bugzilla 1109, patch from Stephen Usher.
1351 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1353 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1356 TF/02 Fix a couple more cases where we did not log the error message
1357 when unlink() failed. See also change 4.74-TF/03.
1359 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1360 lock up or crash if it happened to be inside a call to libc when it
1361 got a SIGUSR1 from exiwhat.
1363 The SIGUSR1 handler appends the current process status to the process
1364 log which is later printed by exiwhat. It used to use the general
1365 purpose logging code to do this, but several functions it calls are
1366 not safe for signals.
1368 The new output code in the SIGUSR1 handler is specific to the process
1369 log, and simple enough that it's easy to inspect for signal safety.
1370 Removing some special cases also simplifies the general logging code.
1371 Removing the spurious timestamps from the process log simplifies
1374 TF/04 Improved ratelimit ACL condition.
1376 The /noupdate option has been deprecated in favour of /readonly which
1377 has clearer semantics. The /leaky, /strict, and /readonly update modes
1378 are mutually exclusive. The update mode is no longer included in the
1379 database key; it just determines when the database is updated. (This
1380 means that when you upgrade Exim will forget old rate measurements.)
1382 Exim now checks that the per_* options are used with an update mode that
1383 makes sense for the current ACL. For example, when Exim is processing a
1384 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1385 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1386 must specify per_mail/readonly. If you omit the update mode it defaults to
1387 /leaky where that makes sense (as before) or /readonly where required.
1389 The /noupdate option is now undocumented but still supported for
1390 backwards compatibility. It is equivalent to /readonly except that in
1391 ACLs where /readonly is required you may specify /leaky/noupdate or
1392 /strict/noupdate which are treated the same as /readonly.
1394 A useful new feature is the /count= option. This is a generalization
1395 of the per_byte option, so that you can measure the throughput of other
1396 aggregate values. For example, the per_byte option is now equivalent
1397 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1399 The per_rcpt option has been generalized using the /count= mechanism
1400 (though it's more complicated than the per_byte equivalence). When it is
1401 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1402 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1403 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1404 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1405 Note that using per_rcpt with a non-readonly update mode in more than
1406 one ACL will cause the recipients to be double-counted. (The per_mail
1407 and per_byte options don't have this problem.)
1409 The handling of very low rates has changed slightly. If the computed rate
1410 is less than the event's count (usually one) then this event is the first
1411 after a long gap. In this case the rate is set to the same as this event's
1412 count, so that the first message of a spam run is counted properly.
1414 The major new feature is a mechanism for counting the rate of unique
1415 events. The new per_addr option counts the number of different
1416 recipients that someone has sent messages to in the last time period. It
1417 behaves like per_rcpt if all the recipient addresses are different, but
1418 duplicate recipient addresses do not increase the measured rate. Like
1419 the /count= option this is a general mechanism, so the per_addr option
1420 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1421 example, measure the rate that a client uses different sender addresses
1422 with the options per_mail/unique=$sender_address. There are further
1423 details in the main documentation.
1425 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1427 TF/06 Removed a few PCRE remnants.
1429 TF/07 Automatically extract Exim's version number from tags in the git
1430 repository when doing development or release builds.
1432 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1433 Bugzilla 879. Patch from Paul Fisher.
1435 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1436 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1439 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1441 PP/05 Variable $av_failed, true if the AV scanner deferred.
1442 Bugzilla 1078. Patch from John Horne.
1444 PP/06 Stop make process more reliably on build failure.
1445 Bugzilla 1087. Patch from Heiko Schlittermann.
1447 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1448 Bugzilla 1089. Patch from Heiko Schlittermann.
1450 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1451 Bugzilla 1131. Patch from Holger Weiß.
1453 PP/09 Handle IPv6 addresses with SPF.
1454 Bugzilla 860. Patch from Wolfgang Breyha.
1456 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1458 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1461 PP/11 match_* no longer expand right-hand-side by default.
1462 New compile-time build option, EXPAND_LISTMATCH_RHS.
1463 New expansion conditions, "inlist", "inlisti".
1465 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1467 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1469 PP/14 fix log_write() format string regression from TF/03.
1470 Bugzilla 1152. Patch from Dmitry Isaikin.
1476 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1478 PP/02 Harmonised TLS library version reporting; only show if debugging.
1479 Layout now matches that introduced for other libraries in 4.74 PP/03.
1481 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1483 PP/04 New "dns_use_edns0" global option.
1485 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1488 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1489 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1491 TK/01 Updated PolarSSL code to 0.14.2.
1492 Bugzilla 1097. Patch from Andreas Metzler.
1494 PP/07 Catch divide-by-zero in ${eval:...}.
1495 Fixes bugzilla 1102.
1497 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1500 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1501 format-string attack -- SECURITY: remote arbitrary code execution.
1503 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1504 time unintentionally subject to list matching rules, letting the header
1505 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1506 arbitrary string expansion). This allowed for information disclosure.
1508 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1509 INT_MIN/-1 -- value coerced to INT_MAX.
1515 NM/01 Workaround for PCRE version dependency in version reporting
1518 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1519 This fixes portability to compilers other than gcc, notably
1520 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1522 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1523 makefiles for portability to HP-UX and POSIX correctness.
1525 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1526 Also via indented variable definition in the Makefile.
1527 (Debugging by Oliver Heesakkers).
1529 PP/02 Restore caching of spamd results with expanded spamd_address.
1530 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1532 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1533 Improves build reliability. Fix from: Frank Elsner
1535 NM/02 Fix wide character breakage in the rfc2047 coding
1536 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1538 NM/03 Allow underscore in dnslist lookups
1539 Fixes bug 1026. Patch from Graeme Fowler
1541 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1542 Code patches from Adam Ciarcinski of NetBSD.
1544 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1547 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1548 is logged, to avoid truncation. Patch from John Horne.
1550 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1551 Patch from Jakob Hirsch.
1553 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1554 SQL string expansion failure details.
1555 Patch from Andrey Oktyabrski.
1557 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1558 Patch from Simon Arlott.
1560 PP/09 New lookups functionality failed to compile on old gcc which rejects
1561 extern declarations in function scope.
1562 Patch from Oliver Fleischmann
1564 PP/10 Use sig_atomic_t for flags set from signal handlers.
1565 Check getgroups() return and improve debugging.
1566 Fixed developed for diagnosis in bug 927 (which turned out to be
1569 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1570 Patch from Mark Zealey.
1572 PP/12 Bugzilla 1056: Improved spamd server selection.
1573 Patch from Mark Zealey.
1575 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1576 Based on patch from Heiko Schlittermann.
1578 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1579 Patch from Uwe Doering, sign-off by Michael Haardt.
1581 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1582 variable declaration deep within a block. Bug and patch from
1585 PP/15 lookups-Makefile IRIX compatibility coercion.
1587 PP/16 Make DISABLE_DKIM build knob functional.
1589 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1590 Patch by Simon Arlott
1592 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1593 variable argument macros. Our copy now differs from upstream.
1599 TF/01 Failure to get a lock on a hints database can have serious
1600 consequences so log it to the panic log.
1602 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1603 controlled using the smtp_confirmation log selector.
1605 TF/03 Include the error message when we fail to unlink a spool file.
1607 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1608 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1609 for maintaining out-of-tree patches for some time.
1611 PP/01 Bugzilla 139: Documentation and portability issues.
1612 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1613 Handle per-OS dynamic-module compilation flags.
1615 PP/02 Let /dev/null have normal permissions.
1616 The 4.73 fixes were a little too stringent and complained about the
1617 permissions on /dev/null. Exempt it from some checks.
1618 Reported by Andreas M. Kirchwitz.
1620 PP/03 Report version information for many libraries, including
1621 Exim version information for dynamically loaded libraries. Created
1622 version.h, now support a version extension string for distributors
1623 who patch heavily. Dynamic module ABI change.
1625 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1626 privilege escalation vulnerability whereby the Exim run-time user
1627 can cause root to append content of the attacker's choosing to
1630 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1633 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1634 If dropping privileges for untrusted macros, we disabled normal logging
1635 on the basis that it would fail; for the Exim run-time user, this is not
1636 the case, and it resulted in successful deliveries going unlogged.
1637 Fixed. Reported by Andreas Metzler.
1643 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1644 only prepend for the Resent-* case. Fixes regression introduced in
1645 Exim 4.70 by NM/22 for Bugzilla 607.
1647 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1648 increasing numbers of administrators be bitten by this.
1650 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1652 PP/03 Bugzilla 994: added openssl_options main configuration option.
1654 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1656 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1658 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1660 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1661 without a peer certificate, leading to a segfault because of an
1662 assumption that peers always have certificates. Be a little more
1663 paranoid. Problem reported by Martin Tscholak.
1665 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1666 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1667 NB: ClamAV planning to remove STREAM in "middle of 2010".
1668 CL also introduces -bmalware, various -d+acl logging additions and
1669 more caution in buffer sizes.
1671 PP/09 Implemented reverse_ip expansion operator.
1673 PP/10 Bugzilla 937: provide a "debug" ACL control.
1675 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1677 PP/12 Bugzilla 973: Implement --version.
1679 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1681 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1683 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1685 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1686 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1687 ignore trailing whitespace.
1689 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1691 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1694 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1695 Notification from Dr Andrew Aitchison.
1697 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1698 ExtendedDetectionInfo response format.
1699 Notification from John Horne.
1701 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1704 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1705 XSL and documented dependency on system catalogs, with examples of how
1708 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1711 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1712 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1713 configuration file which is writeable by the Exim user or group.
1715 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1716 of configuration files to cover files specified with the -C option if
1717 they are going to be used with root privileges, not just the default
1720 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1721 option (effectively making it always true).
1723 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1724 files to be used while preserving root privileges.
1726 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1727 that rogue child processes cannot use them.
1729 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1730 run-time user, instead of root.
1732 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1733 Exim run-time user without dropping privileges.
1735 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1736 result string, instead of calling string_vformat() twice with the same
1739 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1740 for other users. Others should always drop root privileges if they use
1741 -C on the command line, even for a whitelisted configure file.
1743 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1745 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1751 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1752 $data_path, and $header_path variables; fixed documentation bugs and
1755 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1756 exipick to access non-standard spools, including the "frozen" queue
1759 NM/01 Bugzilla 965: Support mysql stored procedures.
1760 Patch from Alain Williams
1762 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1764 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1765 Patch from Andreas Metzler
1767 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1768 Patch from Kirill Miazine
1770 NM/05 Bugzilla 671: Added umask to procmail example.
1772 JJ/03 installed exipick 20100323.0, fixing doc bug
1774 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1775 directory. Notification and patch from Dan Rosenberg.
1777 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1779 TK/02 Improve log output when DKIM signing operation fails.
1781 MH/01 Treat the transport option dkim_domain as a colon separated
1782 list, not as a single string, and sign the message with each element,
1783 omitting multiple occurences of the same signer.
1785 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1786 Bugzilla 985, 986. Patch by Simon Arlott
1788 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1789 Patch by Simon Arlott
1791 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1792 MBX locking. Notification from Dan Rosenberg.
1798 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1800 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1802 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1804 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1806 NM/04 Bugzilla 915: Flag broken perl installation during build.
1812 TK/01 Added patch by Johannes Berg that expands the main option
1813 "spamd_address" if it starts with a dollar sign.
1815 TK/02 Write list of recipients to X-Envelope-Sender header when building
1816 the mbox-format spool file for content scanning (suggested by Jakob
1819 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1820 (http://www.dcc-servers.net/) support via dccifd. Activated by
1821 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1823 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1824 by Mark Daniel Reidel <mr@df.eu>.
1826 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1827 When building exim an external PCRE library is now needed -
1828 PCRE is a system library on the majority of modern systems.
1829 See entry on PCRE_LIBS in EDITME file.
1831 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1832 conversation. Added nologin parameter to request.
1833 Patch contributed by Kirill Miazine.
1835 TF/01 Do not log submission mode rewrites if they do not change the address.
1837 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1839 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1840 log files in place. Contributed by Roberto Lima.
1842 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1844 TF/03 Bugzilla 615: When checking the local_parts router precondition
1845 after a local_part_suffix or local_part_prefix option, Exim now
1846 does not use the address's named list lookup cache, since this
1847 contains cached lookups for the whole local part.
1849 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1850 Robert Millan. Documentation is in experimental-spec.txt.
1852 TF/04 Bugzilla 668: Fix parallel build (make -j).
1854 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1856 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1857 Patch provided by Jan Srzednicki.
1859 TF/05 Leading white space used to be stripped from $spam_report which
1860 wrecked the formatting. Now it is preserved.
1862 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1863 that they are available at delivery time.
1865 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1867 TF/08 TLS error reporting now respects the incoming_interface and
1868 incoming_port log selectors.
1870 TF/09 Produce a more useful error message if an SMTP transport's hosts
1871 setting expands to an empty string.
1873 NM/06 Bugzilla 744: EXPN did not work under TLS.
1874 Patch provided by Phil Pennock.
1876 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1877 Patch provided by Richard Godbee.
1879 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1880 acl_smtp_notquit, added index entry.
1882 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1883 Patch provided by Eugene Bujak.
1885 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1886 accept(). Patch provided by Maxim Dounin.
1888 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1889 Patch provided by Phil Pennock.
1891 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1893 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1894 Patch provided by Brad "anomie" Jorsch.
1896 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1897 Patch provided by Dean Brooks.
1899 TK/05 Add native DKIM support (does not depend on external libraries).
1901 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1902 Patch provided by Graeme Fowler.
1904 NM/16 Bugzilla 851: Documentation example syntax fix.
1906 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1908 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1911 NM/19 Bugzilla 745: TLS version reporting.
1912 Patch provided by Phil Pennock.
1914 NM/20 Bugzilla 167: bool: condition support.
1915 Patch provided by Phil Pennock.
1917 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1918 clients. Patch provided by Phil Pennock.
1920 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1921 Patch provided by Brad "anomie" Jorsch.
1923 NM/23 Bugzilla 687: Fix misparses in eximstats.
1924 Patch provided by Heiko Schlittermann.
1926 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1927 Patch provided by Heiko Schlittermann.
1929 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1930 plus update to original patch.
1932 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1934 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1935 Patch provided by David Brownlee.
1937 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1939 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1941 NM/30 Bugzilla 888: TLS documentation bugfixes.
1943 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1945 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1946 Unlike the original bugzilla I have changed all shell scripts in src tree.
1948 NM/33 Bugzilla 898: Transport filter timeout fix.
1949 Patch by Todd Rinaldo.
1951 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1952 Patch by Serge Demonchaux.
1954 NM/35 Bugzilla 39: Base64 decode bug fixes.
1955 Patch by Jakob Hirsch.
1957 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1959 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1961 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1963 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1969 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1970 ALT-N's libdkim that I have put here:
1971 http://duncanthrax.net/exim-experimental/
1973 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1974 were called 'true' and it seems that C99 defines that as a reserved
1975 keyword to be used with 'bool' variable types. That means you could
1976 not include C99-style headers which use bools without triggering
1977 build errors in sieve.c.
1979 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1980 as mailq or other aliases. Changed the --help handling significantly
1981 to do whats expected. exim_usage() emits usage/help information.
1983 SC/01 Added the -bylocaldomain option to eximstats.
1985 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1987 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1989 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1995 PH/01 Another patch from the Sieve maintainer.
1997 PH/02 When an IPv6 address is converted to a string for single-key lookup
1998 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1999 dots are used instead of colons so that keys in lsearch files need not
2000 contain colons. This was done some time before quoting was made available
2001 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2002 (notated using the quote facility) so as to distinguish them from IPv4
2003 keys. This meant that lookups for IP addresses in host lists did not work
2004 for iplsearch lookups.
2006 This has been fixed by arranging for IPv6 addresses to be expressed with
2007 colons if the lookup type is iplsearch. This is not incompatible, because
2008 previously such lookups could never work.
2010 The situation is now rather anomalous, since one *can* have colons in
2011 ordinary lsearch keys. However, making the change in all cases is
2012 incompatible and would probably break a number of configurations.
2014 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2017 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2018 conversion specification without a maximum field width, thereby enabling
2019 a rogue spamd server to cause a buffer overflow. While nobody in their
2020 right mind would setup Exim to query an untrusted spamd server, an
2021 attacker that gains access to a server running spamd could potentially
2022 exploit this vulnerability to run arbitrary code as the Exim user.
2024 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2025 $primary_hostname instead of what libspf2 thinks the hosts name is.
2027 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2028 a directory entry by the name of the lookup key. Previously, if a
2029 symlink pointed to a non-existing file or a file in a directory that
2030 Exim lacked permissions to read, a lookup for a key matching that
2031 symlink would fail. Now it is enough that a matching directory entry
2032 exists, symlink or not. (Bugzilla 503.)
2034 PH/03 The body_linecount and body_zerocount variables are now exported in the
2037 PH/04 Added the $dnslist_matched variable.
2039 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2040 This means they are set thereafter only if the connection becomes
2043 PH/06 Added the client_condition to authenticators so that some can be skipped
2044 by clients under certain conditions.
2046 PH/07 The error message for a badly-placed control=no_multiline_responses left
2047 "_responses" off the end of the name.
2049 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2051 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2052 (without spaces) instead of just copying the configuration text.
2054 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2056 PH/11 Added $max_received_linelength.
2058 PH/12 Added +ignore_defer and +include_defer to host lists.
2060 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2061 way in which PCRE > 7.0 is built.
2063 PH/14 Implemented queue_only_load_latch.
2065 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2066 MAIL command. The effect was to mangle the value on 64-bit systems.
2068 PH/16 Another patch from the Sieve maintainer.
2070 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2072 PH/18 If a system quota error occurred while trying to create the file for
2073 a maildir delivery, the message "Mailbox is full" was not appended to the
2074 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2075 only to a quota excession during the actual writing of the file.
2077 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2078 characters?) which causes problems in log lines. The DN values are now
2079 passed through string_printing() before being added to log lines.
2081 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2082 and InterBase are left for another time.)
2084 PH/21 Added message_body_newlines option.
2086 PH/22 Guard against possible overflow in moan_check_errorcopy().
2088 PH/23 POSIX allows open() to be a macro; guard against that.
2090 PH/24 If the recipient of an error message contained an @ in the local part
2091 (suitably quoted, of course), incorrect values were put in $domain and
2092 $local_part during the evaluation of errors_copy.
2098 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2099 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2102 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2103 issue a MAIL command.
2105 PH/02 In an ACL statement such as
2107 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2109 if a client was not listed at all, or was listed with a value other than
2110 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2111 the condition was not true (as it should be), so access was not denied.
2112 The bug was that the ! inversion was incorrectly passed on to the second
2113 item. This has been fixed.
2115 PH/03 Added additional dnslists conditions == and =& which are different from
2116 = and & when the dns lookup returns more than one IP address.
2118 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2119 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2121 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2122 FSYNC, which compiles an option called disable_fsync that allows for
2123 bypassing fsync(). The documentation is heavily laced with warnings.
2125 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2127 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2128 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2129 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2130 including adding "make clean"; (3) Added -fPIC when compiling the test
2131 dynamically loaded module, to get rid of a warning.
2133 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2134 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2135 = 0s. The bug is otherwise harmless.
2137 PH/07 There was a bug in the dovecot authenticator such that the value of
2138 $auth1 could be overwritten, and so not correctly preserved, after a
2139 successful authentication. This usually meant that the value preserved by
2140 the server_setid option was incorrect.
2142 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2144 PH/09 Installed PCRE release 7.0.
2146 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2147 run for batched SMTP input. It is now run at the start of every message
2148 in the batch. While fixing this I discovered that the process information
2149 (output by running exiwhat) was not always getting set for -bs and -bS
2150 input. This is fixed, and it now also says "batched" for BSMTP.
2152 PH/11 Added control=no_pipelining.
2154 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2155 patch, slightly modified), and move the expansion of helo_data till after
2156 the connection is made in the smtp transport (so it can use these
2159 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2161 PH/14 Added log_selector = +pid.
2163 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2165 PH/16 Add ${if forany and ${if forall.
2167 PH/17 Added dsn_from option to vary the From: line in DSNs.
2169 PH/18 Flush SMTP output before performing a callout, unless control =
2170 no_callout_flush is set.
2172 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2173 was true (the default) a successful delivery failed to delete the retry
2174 item, thus causing premature timeout of the address. The bug is now
2177 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2179 PH/21 Long custom messages for fakedefer and fakereject are now split up
2180 into multiline responses in the same way that messages for "deny" and
2181 other ACL rejections are.
2183 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2184 with slight modification.
2186 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2187 draft, changing the syntax and factoring some duplicate code".
2189 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2190 for deliveries of the second and subsequent messages over the same SMTP
2193 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2194 ${reduce, with only minor "tidies".
2196 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2198 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2199 expansion side effects.
2201 PH/27 When a message times out after an over-quota error from an Exim-imposed
2202 quota, the bounce message says "mailbox is full". This message was not
2203 being given when it was a system quota that was exceeded. It now should
2206 MH/03 Made $recipients available in local_scan(). local_scan() already has
2207 better access to the recipient list through recipients_list[], but
2208 $recipients can be useful in postmaster-provided expansion strings.
2210 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2211 in the case of a MAIL command with additional options following the
2212 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2213 were accidentally chopped off.
2215 PH/29 SMTP synchronization checks are implemented when a command is read -
2216 there is a check that no more input is waiting when there shouldn't be
2217 any. However, for some commands, a delay in an ACL can mean that it is
2218 some time before the response is written. In this time, more input might
2219 arrive, invalidly. So now there are extra checks after an ACL has run for
2220 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2221 pipelining has not been advertised.
2223 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2225 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2226 returned in the SMTP response when smtp_return_error_details was false.
2227 This has been fixed.
2229 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2230 instead of the C I/O that was originally supplied, because problems were
2231 reported on Solaris.
2233 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2234 Exim which did not show up earlier: it was assuming that a call to
2235 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2236 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2237 was a macro that became an assignment, so it seemed to work. This has
2238 changed to a proper function call with a void return, hence the compile
2239 error. Exim's code has been fixed.
2241 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2244 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2246 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2248 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2249 because it turns out to be too big or there is a timeout) there is no
2250 "Completed" line in the log. When some messages of this type were
2251 selected by exigrep, they were listed as "not completed". Others were
2252 picked up by some special patterns. I have improved the selection
2253 criteria to be more general.
2255 PH/38 The host_find_failed option in the manualroute router can now be set
2256 to "ignore", to completely ignore a host whose IP address cannot be
2257 found. If all hosts are ignored, the behaviour is controlled by the new
2258 host_all_ignored option.
2260 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2261 homing or because of multiple MX records with /mx) generated more than
2262 one IP address, and the following item turned out to be the local host,
2263 all the secondary addresses of the first item were incorrectly removed
2264 from the list, along with the local host and any following hosts (which
2265 is what is supposed to happen).
2267 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2268 whoever called Exim into the -H file. In the case of the daemon it was
2269 behaving confusingly. When first started, it used values for whoever
2270 started the daemon, but after a SIGHUP it used the Exim user (because it
2271 calls itself on a restart). I have changed the code so that it now always
2274 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2275 message are rejected with the same error (e.g. no authentication or bad
2276 sender address), and a DATA command is nevertheless sent (as can happen
2277 with PIPELINING or a stupid MUA), the error message that was given to the
2278 RCPT commands is included in the rejection of the DATA command. This is
2279 intended to be helpful for MUAs that show only the final error to their
2282 PH/42 Another patch from the Sieve maintainer.
2284 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2285 Eximstats - Fixed some broken HTML links and added missing column headers
2287 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2288 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2290 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2292 PH/43 Yet another patch from the Sieve maintainer.
2294 PH/44 I found a way to check for a TCP/IP connection going away before sending
2295 the response to the final '.' that terminates a message, but only in the
2296 case where the client has not sent further data following the '.'
2297 (unfortunately, this is allowed). However, in many cases there won't be
2298 any further data because there won't be any more messages to send. A call
2299 to select() can be used: if it shows that the input is "ready", there is
2300 either input waiting, or the socket has been closed. An attempt to read
2301 the next input character can distinguish the two cases. Previously, Exim
2302 would have sent an OK response which the client would never have see.
2303 This could lead to message repetition. This fix should cure that, at
2304 least in a lot of common cases.
2306 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2307 advertised in response to EHLO.
2313 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2314 fixed by 4.65/MH/01 (is this a record?) are fixed:
2316 (i) An empty string was always treated as zero by the numeric comparison
2317 operators. This behaviour has been restored.
2319 (ii) It is documented that the numeric comparison operators always treat
2320 their arguments as decimal numbers. This was broken in that numbers
2321 starting with 0 were being interpreted as octal.
2323 While fixing these problems I realized that there was another issue that
2324 hadn't been noticed. Values of message_size_limit (both the global option
2325 and the transport option) were treated as octal if they started with 0.
2326 The documentation was vague. These values are now always treated as
2327 decimal, and I will make that clear in the documentation.
2333 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2334 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2337 MH/01 Don't check that the operands of numeric comparison operators are
2338 integers when their expansion is in "skipping" mode (fixes bug
2339 introduced by 4.64-PH/07).
2341 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2342 child addresses, Exim now panics and dies. Previously, because the count
2343 is held in a short int, deliveries were likely to be lost. As such a
2344 large number of recipients for a single message is ridiculous
2345 (performance will be very, very poor), I have chosen to impose a limit
2346 rather than extend the field.
2352 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2353 leftover -K file (the existence of which was triggered by #402).
2354 While we were at it, introduced process PID as part of the -K
2355 filename. This should rule out race conditions when creating
2358 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2359 processing considerably. Previous code took too long for large mails,
2360 triggering a timeout which in turn triggers #401.
2362 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2363 in the DK code in transports.c. sendfile() is not really portable,
2364 hence the _LINUX specificness.
2366 TF/01 In the add_headers option to the mail command in an Exim filter,
2367 there was a bug that Exim would claim a syntax error in any
2368 header after the first one which had an odd number of characters
2371 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2372 callout verification, Exim cached a "reject" for the entire domain. This
2373 is correct for most verifications, but it is not correct for a recipient
2374 verification with use_sender or use_postmaster set, because in that case
2375 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2376 case of MAIL FROM:<> rejection from other early rejections (e.g.
2377 rejection of HELO). When verifying a recipient using a non-null MAIL
2378 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2379 Whatever the result of the callout, the value of the domain cache is
2380 left unchanged (for any other kind of callout, getting as far as trying
2381 RCPT means that the domain itself is ok).
2383 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2386 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2387 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2388 session, the daemon ignores ECONNECT errors and logs others; it now
2389 ignores EPIPE as well.
2391 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2392 (quoted-printable decoding).
2394 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2395 later the small subsequent patch to fix an introduced bug.
2397 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2399 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2401 PH/08 An error is now given if message_size_limit is specified negative.
2403 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2404 to be given (somewhat) arbitrary names.
2406 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2409 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2410 miscellaneous code fixes
2412 PH/10 Added the log_reject_target ACL modifier to specify where to log
2415 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2416 hostname. This is wrong, because it relates to the incoming message (and
2417 probably the interface on which it is arriving) and not to the outgoing
2418 callout (which could be using a different interface). This has been
2419 changed to use the value of the helo_data option from the smtp transport
2420 instead - this is what is used when a message is actually being sent. If
2421 there is no remote transport (possible with a router that sets up host
2422 addresses), $smtp_active_hostname is used.
2424 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2425 tweaks were necessary in order to get it to work (see also 21 below):
2426 (a) The code assumed that strncpy() returns a negative number on buffer
2427 overflow, which isn't the case. Replaced with Exim's string_format()
2429 (b) There were several signed/unsigned issues. I just did the minimum
2430 hacking in of casts. There is scope for a larger refactoring.
2431 (c) The code used strcasecmp() which is not a standard C function.
2432 Replaced with Exim's strcmpic() function.
2433 (d) The code set only $1; it now sets $auth1 as well.
2434 (e) A simple test gave the error "authentication client didn't specify
2435 service in request". It would seem that Dovecot has changed its
2436 interface. Fortunately there's a specification; I followed it and
2437 changed what the client sends and it appears to be working now.
2439 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2442 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2443 address A is aliased to B and C, where B exists and C does not. Without
2444 -v the output is "A verified" because verification stops after a
2445 successful redirection if more than one address is generated. However,
2446 with -v the child addresses are also verified. Exim was outputting "A
2447 failed to verify" and then showing the successful verification for C,
2448 with its parentage. It now outputs "B failed to verify", showing B's
2449 parentage before showing the successful verification of C.
2451 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2452 look up a TXT record in a specific list after matching in a combined
2455 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2456 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2457 they consult the DNS. I had assumed they would set it the way they
2458 wanted; and indeed my experiments on Linux seem to show that in some
2459 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2460 To be on the safe side, however, I have now made the interface to
2461 host_find_byname() similar to host_find_bydns(), with an argument
2462 containing the DNS resolver options. The host_find_byname() function now
2463 sets these options at its start, just as host_find_bydns() does. The smtp
2464 transport options dns_qualify_single and dns_search_parents are passed to
2465 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2466 of host_find_byname() use the default settings of RES_DEFNAMES
2467 (qualify_single) but not RES_DNSRCH (search_parents).
2469 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2470 spool_read_header() do less string testing, by means of a preliminary
2471 switch on the second character of optional "-foo" lines. (This is
2472 overdue, caused by the large number of possibilities that now exist.
2473 Originally there were few.) While I was there, I also converted the
2474 str(n)cmp tests so they don't re-test the leading "-" and the first
2475 character, in the hope this might squeeze out yet more improvement.
2477 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2478 flag allowing group syntax was set by the header_syntax check but not
2479 turned off, possible causing trouble later; (2) The flag was not being
2480 set at all for the header_verify test, causing "group"-style headers to
2481 be rejected. I have now set it in this case, and also caused header_
2482 verify to ignore an empty address taken from a group. While doing this, I
2483 came across some other cases where the code for allowing group syntax
2484 while scanning a header line wasn't quite right (mostly, not resetting
2485 the flag correctly in the right place). These bugs could have caused
2486 trouble for malformed header lines. I hope it is now all correct.
2488 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2489 with the "reply" argument non-NULL. The code, however (which originally
2490 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2491 but it didn't always do it. This confused somebody who was copying the
2492 code for some other use. I have removed all the tests.
2494 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2495 feature that was used to support insecure browsers during the U.S. crypto
2496 embargo. It requires special client support, and Exim is probably the
2497 only MTA that supported it -- and would never use it because real RSA is
2498 always available. This code has been removed, because it had the bad
2499 effect of slowing Exim down by computing (never used) parameters for the
2500 RSA_EXPORT functionality.
2502 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2503 authenticator to fail if there's a tab character in the incoming data
2504 (there should never be unless someone is messing about, as it's supposed
2505 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2506 if the connection is using TLS or if the remote IP is the same as the
2507 local IP, and the "valid-client-cert option" if a client certificate has
2510 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2511 authenticators. This can be used for authorization after authentication
2512 succeeds. (In the case of plaintext, it servers for both authentication
2515 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2516 if any retry times were supplied.
2518 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2519 connection, where there is no client IP address to check. In this
2520 situation, the verify now always succeeds.
2522 PH/25 Applied John Jetmore's -Mset patch.
2524 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2526 PH/27 In a string expansion for a processed (not raw) header when multiple
2527 headers of the same name were present, leading whitespace was being
2528 removed from all of them, but trailing whitespace was being removed only
2529 from the last one. Now trailing whitespace is removed from each header
2530 before concatenation. Completely empty headers in a concatenation (as
2531 before) are ignored.
2533 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2534 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2536 PH/29 [Removed. This was a change that I later backed out, and forgot to
2537 correct the ChangeLog entry (that I had efficiently created) before
2538 committing the later change.]
2540 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2541 address errors (4xx response to RCPT) over the same connection as other
2542 messages routed to the same hosts. Such deliveries are always "forced",
2543 so retry times are not inspected. This resulted in far too many retries
2544 for the affected addresses. The effect occurred only when there were more
2545 hosts than the hosts_max_try setting in the smtp transport when it had
2546 the 4xx errors. Those hosts that it had tried were not added to the list
2547 of hosts for which the message was waiting, so if all were tried, there
2548 was no problem. Two fixes have been applied:
2550 (i) If there are any address or message errors in an SMTP delivery, none
2551 of the hosts (tried or untried) are now added to the list of hosts
2552 for which the message is waiting, so the message should not be a
2553 candidate for sending over the same connection that was used for a
2554 successful delivery of some other message. This seems entirely
2555 reasonable: after all the message is NOT "waiting for some host".
2556 This is so "obvious" that I'm not sure why it wasn't done
2557 previously. Hope I haven't missed anything, but it can't do any
2558 harm, as the worst effect is to miss an optimization.
2560 (ii) If, despite (i), such a delivery is accidentally attempted, the
2561 routing retry time is respected, so at least it doesn't keep
2562 hammering the server.
2564 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2565 in ${readsocket because some servers need this prod.
2567 PH/32 Added some extra debug output when updating a wait-xxx database.
2569 PH/33 The hint "could be header name not terminated by colon", which has been
2570 given for certain expansion errors for a long time, was not being given
2571 for the ${if def:h_colon_omitted{... case.
2573 PH/34 The spec says: "With one important exception, whenever a domain list is
2574 being scanned, $domain contains the subject domain." There was at least
2575 one case where this was not true.
2577 PH/35 The error "getsockname() failed: connection reset by peer" was being
2578 written to the panic log as well as the main log, but it isn't really
2579 panic-worthy as it just means the connection died rather early on. I have
2580 removed the panic log writing for the ECONNRESET error when getsockname()
2583 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2584 runs only) independently of the message's sender address. This meant
2585 that, if the 4xx error was in fact related to the sender, a different
2586 message to the same recipient with a different sender could confuse
2587 things. In particular, this can happen when sending to a greylisting
2588 server, but other circumstances could also provoke similar problems.
2589 I have changed the default so that the retry time for these errors is now
2590 based a combination of the sender and recipient addresses. This change
2591 can be overridden by setting address_retry_include_sender=false in the
2594 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2595 remote server are returned as part of bounce messages. This was not
2596 happening for LMTP over a pipe (the lmtp transport), but now it is the
2597 same for both kinds of LMTP.
2599 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2600 in header lines that were in fact CNAMEs. This is no longer the case.
2602 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2603 and queue runs started by the daemon processed all messages. This has
2604 been fixed so that -R and -S can now usefully be given with -q<time>.
2606 PH/40 Import PCRE release 6.7 (fixes some bugs).
2608 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2610 PH/42 Give an error if -q is specified more than once.
2612 PH/43 Renamed the variables $interface_address and $interface_port as
2613 $received_ip_address and $received_port, to make it clear that these
2614 values apply to message reception, and not to the outgoing interface when
2615 a message is delivered. (The old names remain recognized, of course.)
2617 PH/44 There was no timeout on the connect() call when using a Unix domain
2618 socket in the ${readsocket expansion. There now is.
2620 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2621 be meaningful with "accept".
2623 SC/01 Eximstats V1.43
2624 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2626 SC/02 Eximstats V1.44
2627 Use a glob alias rather than an array ref in the generated
2628 parser. This improves both readability and performance.
2630 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2631 Collect SpamAssassin and rejection statistics.
2632 Don't display local sender or destination tables unless
2633 there is data to show.
2634 Added average volumes into the top table text output.
2636 SC/04 Eximstats V1.46
2637 Collect data on the number of addresses (recipients)
2638 as well as the number of messages.
2640 SC/05 Eximstats V1.47
2641 Added 'Message too big' to the list of mail rejection
2642 reasons (thanks to Marco Gaiarin).
2644 SC/06 Eximstats V1.48
2645 Mainlog lines which have GMT offsets and are too short to
2646 have a flag are now skipped.
2648 SC/07 Eximstats V1.49 (Alain Williams)
2649 Added the -emptyok flag.
2651 SC/08 Eximstats V1.50
2652 Fixes for obtaining the IP address from reject messages.
2654 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2655 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2656 whitespace changes from 4.64-PH/27
2658 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2661 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2662 are found, allow negative numbers in numeric criteria)
2664 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2666 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2667 to match changes made in 4.64-PH/43
2669 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2671 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2672 "domain" is actually an IP address, and force a failure. This locks out
2673 those revolvers/nameservers that support "A-for-A" lookups, in
2674 contravention of the specifications.
2676 PH/48 When a host name was looked up from an IP address, and the subsequent
2677 forward lookup of the name timed out, the host name was left in
2678 $sender_host_name, contrary to the specification.
2680 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2681 restricted to single-key lookups, Exim was not diagnosing an error if
2682 * or *@ was used with a query-style lookup.
2684 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2686 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2687 long ago, but noone interested enough thought of it. Let's just say that
2688 the "1.1" means that there are some new functions that weren't there at
2689 some point in the past.
2691 PH/51 Error processing for expansion failure of helo_data from an smtp
2692 transport during callout processing was broken.
2694 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2695 tested/used via the -bh/-bhc/-bs options.
2697 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2698 bug, fixed in subsequent PCRE releases).
2700 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2701 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2703 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2709 SC/01 Use a glob alias rather than an array ref in eximstats generated
2710 parser. This improves both readability and performance.
2712 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2713 Don't display local sender or destination tables in eximstats unless
2714 there is data to show.
2715 Added average volumes into the eximstats top table text output.
2717 SC/03 Collect data on the number of addresses (recipients) as well
2718 as the number of messages in eximstats.
2720 TF/01 Correct an error in the documentation for the redirect router. Exim
2721 does (usually) call initgroups() when daemonizing.
2723 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2724 with consistent privilege compared to when running as a daemon.
2726 TF/03 Note in the spec that $authenticated_id is not set for local
2727 submissions from trusted users.
2729 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2730 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2732 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2733 by adding some example configuration directives to the default
2734 configuration file. A little bit of work is required to uncomment the
2735 directives and define how usernames and passwords are checked, but
2736 there is now a framework to start from.
2738 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2739 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2740 without this. I don't know how relevant this is to other LDAP libraries.
2742 PH/02 Add the verb name to the "unknown ACL verb" error.
2744 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2746 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2748 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2749 directory not expanded when it should be if an expanded home directory
2750 was set for the address (which is overridden by the transport).
2752 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2755 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2756 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2757 because it is too late at that time, and has no effect.
2759 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2760 security issue with \' (bugzilla #107). I could not use the
2761 PQescapeStringConn() function, because it needs a PGconn value as one of
2764 PH/08 When testing addresses using -bt, indicate those final addresses that
2765 are duplicates that would not cause an additional delivery. At least one
2766 person was confused, thinking that -bt output corresponded to deliveries.
2767 (Suppressing duplicates isn't a good idea as you lose the information
2768 about possibly different redirections that led to the duplicates.)
2770 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2771 systems where poll() doesn't work, in particular OS X.
2773 PH/10 Added more information to debugging output for retry time not reached.
2775 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2776 operations in malware.c.
2778 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2781 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2782 syslog_duplication set false, log lines that would normally be written
2783 both the the main log and to the reject log were not written to syslog at
2786 PH/14 In the default configuration, change the use of "message" in ACL warn
2787 statements to "add_header".
2789 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2790 not followed by a command (e.g. "seen endif").
2792 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2793 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2796 PH/17 Added extra conditions to the default value of delay_warning_condition
2800 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2801 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2802 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2805 The Auto-Submitted: and various List- headers are standardised, whereas I
2806 don't think Precedence: ever was.
2808 PH/18 Refactored debugging code in route_finduser() to show more information,
2809 in particular, the error code if getpwnam() issues one.
2811 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2812 This is apparently needed in addition to the PH/07 change above to avoid
2813 any possible encoding problems.
2815 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2816 but not after initializing Perl.
2818 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2819 output them only if debugging. By default they are written stderr,
2820 apparently, which is not desirable.
2822 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2825 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2828 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2830 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2831 authenticated or an ident call has been made. Suppress the default
2832 values for $authenticated_id and $authenticated_sender (but permit -oMai
2833 and -oMas) when testing with -bh.
2835 PH/24 Re-jigged the order of the tests in the default configuration so that the
2836 tests for valid domains and recipients precede the DNS black list and CSA
2837 tests, on the grounds that those ones are more expensive.
2839 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2840 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2841 This bug exists in every version of Exim that I still have, right back to
2844 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2845 However, an attempt to turn on case-sensitivity in a regex key by
2846 including (?-i) didn't work because the subject string was already
2847 lowercased, and the effects were non-intuitive. It turns out that a
2848 one-line patch can be used to allow (?-i) to work as expected.
2854 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2855 other effects) broke the use of negated acl sub-conditions.
2857 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2860 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2861 "Deny" causes Exim to reject the incoming connection with a 554 error.
2862 Unfortunately, if there is a major crisis, such as a disk failure,
2863 tcp-wrappers gives "deny", whereas what one would like would be some
2864 kind of temporary error. A kludge has been added to help with this.
2865 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2866 554 error is used if errno is still zero or contains ENOENT (which occurs
2867 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2870 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2872 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2873 errors. Otherwise a message that provokes a temporary error (when other
2874 messages do not) can cause a whole host to time out.
2876 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2877 addresses were routed directly to files or pipes from a redirect router.
2878 File deliveries just didn't batch; pipe deliveries might have suffered
2881 PH/06 A failure to get a lock for a hints database would erroneously always say
2882 "Failed to get write lock", even when it was really a read lock.
2884 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2885 of 0600. This has been changed to use the value of the lockfile_mode
2886 option (which defaults to 0600).
2888 PH/08 Applied small patch from the Sieve maintainer.
2890 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2891 folder from quota calculations, a direct delivery into this folder messed
2892 up the contents of the maildirsize file. This was because the regex was
2893 used only to exclude .Trash (or whatever) when the size of the mailbox
2894 was calculated. There was no check that a delivery was happening into an
2895 excluded directory. This bug has been fixed by ignoring all quota
2896 processing for deliveries into excluded directories.
2898 PH/10 Added the maildirfolder_create_regex option to appendfile.
2904 PH/01 The code for finding all the local interface addresses on a FreeBSD
2905 system running IPv6 was broken. This may well have applied to all BSD
2906 systems, as well as to others that have similar system calls. The broken
2907 code found IPv4 interfaces correctly, but gave incorrect values for the
2908 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2909 that it would not match correctly against @[] and not recognize the IPv6
2912 PH/02 The ipliteral router was not recognizing addresses of the form user@
2913 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2915 PH/03 Added disable_ipv6.
2917 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2918 decoded form, because it is most often used to construct To: headers
2919 lines in autoreplies, and the decoded form may well be syntactically
2920 invalid. However, $reply_address has leading white space removed, and all
2921 newlines turned into spaces so that the autoreply transport does not
2924 PH/05 If group was specified without a user on a router, and no group or user
2925 was specified on a transport, the group from the router was ignored.
2927 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2928 for visible compile-time settings that can be used to change these
2929 numbers, for those that want even more. Backwards compatibility with old
2930 spool files has been maintained. However, going back to a previous Exim
2931 release will lost any variables that are in spool files.
2933 PH/07 Two small changes when running in the test harness: increase delay when
2934 passing a TCP/IP connection to a new process, in case the original
2935 process has to generate a bounce, and remove special handling of
2936 127.0.0.2 (sic), which is no longer necessary.
2938 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2939 be the same on different OS.
2941 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2944 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2945 whether --show-vars was specified or not
2947 JJ/02 exipick: Added support for new ACL variable spool format introduced
2950 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2951 syntactically invalid From: or Reply-to: line, and a filter used this to
2952 generate an autoreply, and therefore failed to obtain an address for the
2953 autoreply, Exim could try to deliver to a non-existent relative file
2954 name, causing unrelated and misleading errors. What now happens is that
2955 it logs this as a hard delivery error, but does not attempt to create a
2958 PH/11 The exinext utility has a -C option for testing purposes, but although
2959 the given file was scanned by exinext itself; it wasn't being passed on
2960 when Exim was called.
2962 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2963 an end-of-file indication when reading a command response.
2965 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2966 compiled. In many other places in Exim, IPv6 addresses are always
2967 recognized, so I have changed this. It also means that IPv4 domain
2968 literals of the form [IPV4:n.n.n.n] are now always recognized.
2970 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2971 used if the router is not running as root, for example, when verifying at
2972 ACL time, or when using -bh. The debugging output from this situation was
2973 non-existent - all you got was a failure to exec. I have made two
2976 (a) Failures to set uid/gid, the current directory, or a process leader
2977 in a subprocess such as that created by queryprogram now generate
2978 suitable debugging output when -d is set.
2980 (b) The queryprogram router detects when it is not running as root,
2981 outputs suitable debugging information if -d is set, and then runs
2982 the subprocess without attempting to change uid/gid.
2984 PH/15 Minor change to Makefile for building test_host (undocumented testing
2987 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2988 additional section of a DNS packet that returns MX or SRV records.
2989 Instead, it always explicitly searches for A/AAAA records. This avoids
2990 major problems that occur when a DNS server includes only records of one
2991 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2992 fixed another bug: if SRV records were looked up and the corresponding
2993 address records were *not* found in the additional section, the port
2994 values from the SRV records were lost.
2996 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2997 using the correct key (the original address) when searching the retry
2998 rules in order to find which one to use for generating the retry hint.
3000 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3001 adding the default one. Similarly, if it contains a Reply-To: header, the
3002 errors_reply_to option, if set, is not used.
3004 PH/19 When calculating a retry time, Exim used to measure the "time since
3005 failure" by looking at the "first failed" field in the retry record. Now
3006 it does not use this if it is later than than the arrival time of the
3007 message. Instead it uses the arrival time. This makes for better
3008 behaviour in cases where some deliveries succeed, thus re-setting the
3009 "first failed" field. An example is a quota failure for a huge message
3010 when small messages continue to be delivered. Without this change, the
3011 "time since failure" will always be short, possible causing more frequent
3012 delivery attempts for the huge message than are intended.
3013 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3015 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3016 $1, $2, $3) because the numerical variables can be reset during some
3017 expansion items (e.g. "match"), thereby losing the authentication data.
3019 PH/21 Make -bV show the size of off_t variables so that the test suite can
3020 decide whether to run tests for quotas > 2G.
3022 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3023 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3024 filecount value is greater than 2G or if a quota value is greater than 2G
3025 on a system where the size of off_t is not greater than 4, a panic error
3028 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3029 never match. The debug and -bh output now contains an explicit error
3030 message indicating a malformed IPv4 address or mask.
3032 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3033 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3034 PH/23 above applies.
3036 PH/25 Do not write to syslog when running in the test harness. The only
3037 occasion when this arises is a failure to open the main or panic logs
3038 (for which there is an explicit test).
3040 PH/26 Added the /no_tell option to "control=freeze".
3042 PH/27 If a host name lookup failed very early in a connection, for example, if
3043 the IP address matched host_lookup and the reverse lookup yielded a name
3044 that did not have a forward lookup, an error message of the form "no IP
3045 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3046 could be logged. Now it outputs the IP address instead of "NULL".
3048 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3049 allows the sender and the authenticated sender to be set when
3050 submitting a message from within Exim. Since child_open_exim() is
3051 documented for local_scan(), the new function should be too.
3053 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3054 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3055 results in an empty string is now treated as unset.
3057 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3059 PH/31 Added sender_verify_fail logging option.
3061 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3062 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3063 tidied the source and removed it altogether.
3065 PH/33 When a queue run was abandoned because the load average was too high, a
3066 log line was always written; now it is written only if the queue_run log
3067 selector is set. In addition, the log line for abandonment now contains
3068 information about the queue run such as the pid. This is always present
3069 in "start" and "stop" lines but was omitted from the "abandon" line.
3071 PH/34 Omit spaces between a header name and the colon in the error message that
3072 is given when verify = headers_syntax fails (if there are lots of them,
3073 the message gets confusing).
3075 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3076 names, as there are now some PTR records that contain slashes. This check
3077 is only to protect against broken name servers that fall over on strange
3078 characters, so the fact that it applies to all lookups doesn't matter.
3080 PH/36 Now that the new test suite is complete, we can remove some of the
3081 special code in Exim that was needed for the old test suite. For example,
3082 sorting DNS records because real resolvers return them in an arbitrary
3083 order. The new test suite's fake resolver always returns records in the
3086 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3087 bounces) except when queue_only is set, to avoid logging races between
3088 the different processes.
3090 PH/38 Panic-die if .include specifies a non-absolute path.
3092 PH/39 A tweak to the "H" retry rule from its user.
3094 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3095 a label. They prevented compilation on older perls.
3097 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3098 a warning to be raised on newish perls.
3100 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3101 on queue. Changes to match documented behaviour of showing count of
3102 messages matching specified criteria.
3104 PH/40 Changed the default ident timeout from 30s to 5s.
3106 PH/41 Added support for the use of login_cap features, on those BSD systems
3107 that have them, for controlling the resources used by pipe deliveries.
3109 PH/42 The content-scanning code uses fopen() to create files in which to put
3110 message data. Previously it was not paying any attention to the mode of
3111 the files. Exim runs with umask(0) because the rest of the code creates
3112 files with open(), and sets the required mode explicitly. Thus, these
3113 files were ending up world-writeable. This was not a big issue, because,
3114 being within the spool directory, they were not world-accessible. I have
3115 created a function called modefopen, which takes an additional mode
3116 argument. It sets umask(777), creates the file, chmods it to the required
3117 mode, then resets the umask. All the relevant calls to fopen() in the
3118 content scanning code have been changed to use this function.
3120 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3121 to 24 hours. This avoids potential overflow problems when processing G
3122 and H retry rules. I suspect nobody ever tinkers with this value.
3124 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3126 PH/45 When the plaintext authenticator is running as a client, the server's
3127 challenges are checked to ensure they are valid base64 strings. By
3128 default, the authentication attempt is cancelled if an invalid string is
3129 received. Setting client_ignore_invalid_base64 true ignores these errors.
3130 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3131 they are received. Thus, the responses can be made to depend on the
3132 challenges. If an invalid string is ignored, an empty string is placed in
3135 PH/46 Messages that are created by the autoreply transport now contains a
3136 References: header, in accordance with RFCs 2822 and 3834.
3138 PH/47 Added authenticated_sender_force to the smtp transport.
3140 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3142 PH/49 Installed latest patch from the Sieve maintainer.
3144 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3145 was also set, the appendfile transport was unnecessarily scanning a
3146 directory of message files (e.g. for maildir delivery) to find the count
3147 of files (along with the size), even though it did not need this
3148 information. It now does the scan only if it needs to find either the
3149 size of the count of files.
3151 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3153 PH/52 Two bugs concerned with error handling when the smtp transport is
3156 (i) Exim was not creating retry information for temporary errors given
3157 for individual recipients after the DATA command when the smtp transport
3158 was used in LMTP mode. This meant that they could be retried too
3159 frequently, and not timed out correctly.
3161 (ii) Exim was setting the flag that allows error details to be returned
3162 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3163 recipients that were returned after the DATA command.
3165 PH/53 This is related to PH/52, but is more general: for any failing address,
3166 when detailed error information was permitted to be returned to the
3167 sender, but the error was temporary, then after the final timeout, only
3168 "retry timeout exceeded" was returned. Now it returns the full error as
3169 well as "retry timeout exceeded".
3171 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3172 do this, and (what is worse) MTAs that accept it.
3174 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3175 will now be deprecated.
3177 PH/56 New os.c-cygwin from the Cygwin maintainer.
3179 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3180 formats (previously only available in exim formats via -bpr, -bpru,
3181 and -bpra. Now also available in native and exiqgrep formats)
3183 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3184 with very large, slow to parse queues
3186 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3188 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3190 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3191 responses to authentication challenges, though it was showing the
3192 challenges; (ii) I've removed the CR characters from the debug output for
3195 PH/58 Allow for the insertion of a newline as well as a space when a string
3196 is turned into more than one encoded-word during RFC 2047 encoding. The
3197 Sieve code now uses this.
3199 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3200 data_4xx, lost_connection, tls_required.
3202 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3203 message was being sent as an SMTP response.
3205 PH/61 Add -l and -k options to exicyclog.
3207 PH/62 When verifying, if an address was redirected to one new address, so that
3208 verification continued, and the new address failed or deferred after
3209 having set something in $address_data, the value of $address_data was not
3210 passed back to the ACL. This was different to the case when no
3211 redirection occurred. The value is now passed back in both cases.
3213 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3214 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3215 use login_cap.h, so on its own it isn't the distinguishing feature. The
3216 new name refers directly to the setclassresources() function.
3218 PH/65 Added configuration files for NetBSD3.
3220 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3222 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3223 is preferred over IPv4.
3225 PH/68 The bounce_return_message and bounce_return_body options were not being
3226 honoured for bounces generated during the reception of non-SMTP messages.
3227 In particular, this applied to messages rejected by the ACL. This bug has
3228 been fixed. However, if bounce_return_message is true and bounce_return_
3229 body is false, the headers that are returned for a non-SMTP message
3230 include only those that have been read before the error was detected.
3231 (In the case of an ACL rejection, they have all been read.)
3233 PH/69 The HTML version of the specification is now built in a directory called
3234 spec_html instead of spec.html, because the latter looks like a path with
3235 a MIME-type, and this confuses some software.
3237 PH/70 Catch two compiler warnings in sieve.c.
3239 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3240 function verify_get_ident() calls ip_connect() to connect a socket, but
3241 if the "connect()" function timed out, ip_connect() used to close the
3242 socket. However, verify_get_ident() also closes the socket later, and in
3243 between Exim writes to the log, which may get opened at this point. When
3244 the socket was closed in ip_connect(), the log could get the same file
3245 descriptor number as the socket. This naturally causes chaos. The fix is
3246 not to close the socket in ip_connect(); the socket should be closed by
3247 the function that creates it. There was only one place in the code where
3248 this was missing, in the iplookup router, which I don't think anybody now
3249 uses, but I've fixed it anyway.
3251 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3252 well as to direct DNS lookups. Otherwise the handling of names in host
3253 lists is inconsistent and therefore confusing.
3259 PH/01 Two changes to the default runtime configuration:
3261 (1) Move the checks for relay_from_hosts and authenticated clients from
3262 after to before the (commented out) DNS black list checks.
3264 (2) Add control=submission to the relay_from_hosts and authenticated
3265 clients checks, on the grounds that messages accepted by these
3266 statements are most likely to be submissions.
3268 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3270 (1) Generate an error if the third argument for the ${prvs expansion is
3273 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3276 (3) Reset the variables that are obtained from the first argument of
3277 ${prvscheck and used in the second argument before leaving the code,
3278 because their memory is reclaimed, so using them afterwards may do
3281 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3282 one (it's much easier than Tom thought :-).
3284 (5) Because of (4), we can now allow for the use of $prvscheck_result
3285 inside the third argument.
3287 PH/03 For some reason, the default setting of PATH when running a command from
3288 a pipe transport was just "/usr/bin". I have changed it to
3291 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3292 anything to be listed in the output from -bV.
3294 PH/05 When a filter generated an autoreply, the entire To: header line was
3295 quoted in the delivery log line, like this:
3297 => >A.N.Other <ano@some.domain> <original@ddress> ...
3299 This has been changed so that it extracts the operative address. There
3300 may be more than one such address. If so, they are comma-separated, like
3303 => >ano@some.domain,ona@other.domain <original@ddress> ...
3305 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3306 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3307 not being looked up in the rDNS to get a host name, Exim was showing the
3308 IP address twice in Received: lines, even though the IP addresses were
3309 identical. For example:
3311 Received: from [1.2.3.4] (helo=[1.2.3.4])
3313 However, if the real host name was known, it was omitting the HELO data
3314 if it matched the actual IP address. This has been tidied up so that it
3315 doesn't show the same IP address twice.
3317 PH/07 When both +timestamp and +memory debugging was on, the value given by
3318 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3319 called by the debug printing, thereby overwriting the timestamp buffer.
3320 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3322 PH/08 When the original message was included in an autoreply transport, it
3323 always said "this is a copy of the message, including all the headers",
3324 even if body_only or headers_only was set. It now gives an appropriate
3327 PH/09 Applied a patch from the Sieve maintainer which:
3329 o fixes some comments
3330 o adds the (disabled) notify extension core
3331 o adds some debug output for the result of if/elsif tests
3332 o points to the current vacation draft in the documentation
3333 and documents the missing references header update
3337 o fixes a bug in processing the envelope test (when testing
3338 multiple envelope elements, the last element determined the
3341 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3342 Electronic Mail") by including:
3344 Auto-submitted: auto-generated
3346 in the messages that it generates (bounce messages and others, such as
3347 warnings). In the case of bounce messages for non-SMTP messages, there was
3348 also a typo: it was using "Auto_submitted" (underscore instead of
3349 hyphen). Since every message generated by Exim is necessarily in response
3350 to another message, thes have all been changed to:
3352 Auto-Submitted: auto-replied
3354 in accordance with these statements in the RFC:
3356 The auto-replied keyword:
3358 - SHOULD be used on messages sent in direct response to another
3359 message by an automatic process,
3361 - MUST NOT be used on manually-generated messages,
3363 - MAY be used on Delivery Status Notifications (DSNs) and Message
3364 Disposition Notifications (MDNs),
3366 - MUST NOT be used on messages generated by automatic or periodic
3367 processes, except for messages which are automatic responses to
3370 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3371 to the default Received: header definition.
3373 PH/12 Added log selector acl_warn_skipped (default on).
3375 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3376 variables because (a) they are in the wrong storage pool and (b) even if
3377 they were copied, it wouldn't work properly because of the caching.
3379 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3380 checking when decoding. Apparently there are clients that generate
3381 overlong encoded strings. Why am I not surprised?
3383 PH/15 If the first argument of "${if match_address" was not empty, but did not
3384 contain an "@" character, Exim crashed. Now it writes a panic log message
3385 and treats the condition as false.
3387 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3389 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3390 extension "envelope-auth". The code is finished and in agreement with
3391 other implementations, but there is no documentation so far and in fact,
3392 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3393 not changing the active code.
3395 Print executed "if" and "elsif" statements when debugging is used. This
3396 helps a great deal to understand what a filter does.
3398 Document more things not specified clearly in RFC3028. I had all this
3399 sorted out, when out of a sudden new issues came to my mind. Oops."
3401 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3404 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3405 canonical form (as documented). However, after a host name lookup from
3406 the IP address, check_host() was doing a simple string comparison with
3407 addresses acquired from the DNS when checking that the found name did
3408 have the original IP as one of its addresses. Since any found IPv6
3409 addresses are likely to be in abbreviated form, the comparison could
3410 fail. Luckily, there already exists a function for doing the comparison
3411 by converting both addresses to binary, so now that is used instead of
3412 the text comparison.
3414 PH/20 There was another similar case to PH/19, when a complete host name was
3415 given in a host list; looking up its IP address could give an abbreviated
3416 form, whereas the current host's name might or might not be abbreviated.
3417 The same fix has been applied.
3423 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3424 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3427 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3428 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3430 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3432 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3433 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3434 Also, for "Auto-Submitted", treat anything other than "no" as
3435 non-personal, in accordance with RFC 3834. (Previously it treated
3436 anything starting "auto-" as non-personal.)
3438 TF/01 The control=submission/name=... option had a problem with syntax
3439 errors if the name included a slash character. The /name= option
3440 now slurps the rest of the string, so it can include any characters
3441 but it must come last in the list of options (after /sender_retain
3444 PH/05 Some modifications to the interface to the fake nameserver for the new
3452 TK/01 Added the "success_on_redirect" address verification option. See
3453 NewStuff for rationale and an example.
3455 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3457 PH/02 Patch to exigrep to allow it to work on syslog lines.
3459 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3460 fread() to skip over the body file's header line, because in Cygwin the
3461 header line is locked and is inaccessible.
3463 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3464 co-exist for some time) to make it clear that it is the Exim ID that is
3465 referenced, not the Message-ID: header line.
3467 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3468 string_format() function, because snprintf() does not exist on all
3471 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3472 ${stat: expansion item.
3474 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3475 protocol synchronization error", to keep the pedants happy.
3477 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3478 well as for IRIX systems, when gcc is being used. See the host.c source
3481 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3483 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3486 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3487 transport and to the smtp transport in LMTP mode.
3489 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3491 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3492 run a filter in a subprocess. This could lead to confusion in subsequent
3493 lookups in the parent process. There should also be a search_tidyup() at
3494 the end of the subprocess.
3496 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3497 only if the host matched helo_try_verify_hosts, which caused the
3498 verification to occur when the EHLO/HELO command was issued. The ACL just
3499 tested the remembered result. Now, if a previous verification attempt has
3500 not happened, "verify = helo" does it there and then.
3502 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3504 TK/03 Fix log output including CR from clamd.
3506 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3507 exist provoked a memory error which could cause a segfault.
3509 PH/15 Installed PCRE 6.2
3511 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3513 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3514 of the problem. Specifically, suggested +O2 rather than +O1 for the
3517 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3519 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3520 record, the port was not correctly logged when the outgoing_port log
3521 selector was set (it logged the transort's default port).
3523 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3524 fallback_hosts, and "hosts" in the smtp transport.
3526 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3527 host errors such as "Connection refused".
3529 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3530 authentication with radiusclient 0.4.9:
3532 - Error returned from rc_read_config was caught wrongly
3533 - Username/password not passed on to radius server due to wrong length.
3535 The presumption is that some radiusclient API changes for 4.51/PH/17
3536 were not taken care of correctly. The code is still untested by me (my
3537 Linux distribution still has 0.3.2 of radiusclient), but it was
3538 contributed by a Radius user.
3540 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3541 expanding the "port" option of the smtp transport.
3543 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3544 while reading a MIME header. Thanks to Tom Hughes for a patch.
3546 PH/24 Include config.h inside local_scan.h so that configuration settings are
3549 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3550 that in an ACL for RCPT (for example), you can examine exactly what was
3553 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3554 commands, but it was not correctly comparing the address with the actual
3555 client host address. Thus, it would show the EHLO address in Received:
3556 header lines when this was not necessary.
3558 PH/27 Added the % operator to ${eval:}.
3560 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3561 it should be ignoring failures (because with -C, for example, it has lost
3562 privilege). It wasn't ignoring creation failures other than "already
3565 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3568 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3569 because an input line was too long, either on its own, or by virtue of
3570 too many continuations, the temporary file was not being removed, and the
3571 return code was incorrect.
3573 PH/31 Missing "BOOL" in function definition in filtertest.c.
3575 PH/32 Applied Sieve patches from the maintainer.
3577 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3579 PH/33 Added "verify = not_blind".
3581 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3582 Local/Makefile (with some defaults set). These are used in built scripts
3583 such as exicyclog, but they have never been used in the exim_install
3584 script (though there are many overriding facilities there). I have
3585 arranged that the exim_install script now takes note of these two
3588 PH/35 Installed configuration files for Dragonfly.
3590 PH/36 When a locally submitted message by a trusted user did not contain a
3591 From: header, and the sender address was obtained from -f or from an SMTP
3592 MAIL command, and the trusted user did not use -F to supply a sender
3593 name, $originator_name was incorrectly used when constructing a From:
3594 header. Furthermore, $originator_name was used for submission mode
3595 messages from external hosts without From: headers in a similar way,
3596 which is clearly wrong.
3598 PH/37 Added control=suppress_local_fixups.
3600 PH/38 When log_selector = +received_sender was set, and the addition of the
3601 sender made the log line's construction buffer exactly full, or one byte
3602 less than full, an overflow happened when the terminating "\n" was
3605 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3606 when the result of a list match is failure because a DNS lookup failed.
3608 PH/40 RM_COMMAND is now used in the building process.
3610 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3611 the "build-* directories that it finds.
3613 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3614 address in a domain literal was a prefix of an interface address.
3616 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3617 when verifying a sender address, unless rewrite_headers is false.
3619 PH/44 Wrote a long comment about why errors_to addresses are verified as
3620 recipients, not senders.
3622 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3623 the ratelimit ACL was added.
3625 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3627 PH/46 Added extra information about PostgreSQL errors to the error string.
3629 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3630 avoiding the need to install special zones in a real server. This is
3631 backwards compatible; if it can't find the fake resolver, it drops back.
3632 Thus, both old and new test suites can be run.
3634 TF/02 Added util/ratelimit.pl
3636 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3637 clock is set back in time.
3639 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3640 Candler <B.Candler@pobox.com>.
3642 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3643 OK for addresses that are the result of redirections.
3645 PH/48 A number of further additions for the benefit of the new test suite,
3646 including a fake gethostbyname() that interfaces to the fake DNS resolver
3649 TF/06 The fix for widen_domains has also been applied to qualify_single and
3650 search_parents which are the other dnslookup options that can cause
3653 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3656 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3658 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3659 service" if it encountered an MX record with an empty target hostname.
3660 The message is now "an MX or SRV record indicated no SMTP service".
3662 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3663 if the DNS of the sending site is misconfigured. This is quite a
3664 common situation. This change restores the behaviour of treating a
3665 helo verification defer as a failure.
3667 PH/51 If self=fail was set on a router, the bounce message did not include the
3668 actual error message.
3674 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3676 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3677 command itself ended in error, the underlying message about the transport
3678 filter timeout was being overwritten with the pipe command error. Now the
3679 underlying error message should be appended to the second error message.
3681 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3683 PH/02 Reduce the amount of output that "make" produces by default. Full output
3684 can still be requested.
3686 PH/03 The warning log line about a condition test deferring for a "warn" verb
3687 was being output only once per connection, rather than after each
3688 occurrence (because it was using the same function as for successful
3689 "warn" verbs). This seems wrong, so I have changed it.
3691 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3692 it should not have, which might have caused a crash in the right
3693 circumstances, but probably never did.
3695 PH/04 Installed a modified version of Tony Finch's patch to make submission
3696 mode fix the return path as well as the Sender: header line, and to
3697 add a /name= option so that you can make the user's friendly name appear
3700 TF/03 Added the control = fakedefer ACL modifier.
3702 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3703 Mark Lowes for thorough testing.
3705 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3707 TK/03 Merged latest SRS patch from Miles Wilton.
3709 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3710 with the definition in sysexits.h (which is #included earlier).
3711 Fortunately, Exim does not actually use EX_OK. The code used to try to
3712 preserve the sysexits.h value, by assuming that macro definitions were
3713 scanned for macro replacements. I have been disabused of this notion,
3714 so now the code just undefines EX_OK before #including unistd.h.
3716 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3717 in the smtp transport. When a block could not be written in a single
3718 write() function, the timeout was being re-applied to each part-write.
3719 This seems wrong - if the receiver was accepting one byte at a time it
3720 would take for ever. The timeout is now adjusted when this happens. It
3721 doesn't have to be particularly precise.
3723 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3724 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3726 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3727 without a domain if the check to <postmaster@domain> fails.
3729 SC/01 Eximstats: added -xls and the ability to specify output files
3730 (patch written by Frank Heydlauf).
3732 SC/02 Eximstats: use FileHandles for outputting results.
3734 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3736 SC/04 Eximstats: fixed display of large numbers with -nvr option
3738 SC/05 Eximstats: fixed merging of reports with empty tables.
3740 SC/06 Eximstats: added the -include_original_destination flag
3742 SC/07 Eximstats: removed tabs and trailing whitespace.
3744 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3746 TK/06 MBOX spool code: Add real "From " MBOX separator line
3747 so the .eml file is really in mbox format (even though
3748 most programs do not really care). Patch from Alex Miller.
3750 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3751 The latter is generated from $received_to and is only set if the
3752 message has one envelope recipient. SA can use these headers,
3753 obviously out-of-the-box. Patch from Alex Miller.
3755 PH/08 The ${def test on a variable was returning false if the variable's
3756 value was "0", contrary to what the specification has always said!
3757 The result should be true unless the variable is empty.
3759 PH/09 The syntax error of a character other than { following "${if
3760 def:variable_name" (after optional whitespace) was not being diagnosed.
3761 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3762 accidental colon was present, for example, could give incorrect results.
3764 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3765 result is used (not including appendfile, where other changes are about
3768 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3769 This involved changing a lot of size variables from int to off_t. It
3770 should work with maildirs and everything.
3772 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3773 spamd dying while we are connected to it.
3775 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3778 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3779 function for BDB 4.3.
3781 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3783 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3784 the sources for PCRE have been re-arranged and more files are now
3787 PH/15 The code I had for printing potentially long long variables in PH/11
3788 above was not the best (it lost precision). The length of off_t variables
3789 is now inspected at build time, and an appropriate printing format (%ld
3790 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3791 to be "long long int" or "long int". This is needed for the internal
3792 formatting function string_vformat().
3794 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3795 the configuration file to be ":syslog", then the script "guesses" where
3796 the logs files are, rather than using the compiled in default. In our
3797 case the guess is not the same as the compiled default, so the script
3798 suddenly stopped working when I started to use syslog. The patch checks
3799 to see if log_file_path is "". If so, it attempts to read it from exim
3800 with no configuration file to get the compiled in version, before it
3801 falls back to the previous guessing code."
3803 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3804 implementing BATV in an Exim configuration. See NewStuff for the gory
3807 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3808 Makefile that are specific to HP-UX.
3810 PH/18 If the "use_postmaster" option was set for a recipient callout together
3811 with the "random" option, the postmaster address was used as the MAIL
3812 FROM address for the random test, but not for the subsequent recipient
3813 test. It is now used for both.
3815 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3816 patch removes a few documentation additions to RFC 3028, because the
3817 latest draft now contains them. It adds the new en;ascii-case comparator
3818 and a new error check for 8bit text in MIME parts. Comparator and
3819 require names are now matched exactly. I enabled the subaddress
3820 extension, but it is not well tested yet (read: it works for me)."
3822 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3823 rework some of the code of TK/09 above to avoid the hardwired use of
3824 "%lld" and "long long". Replaced the call to snprintf() with a call to
3827 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3828 records point to non-existent hosts", "retry timeout exceeded", and
3829 "retry time not reached for any host after a long failure period".
3831 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3832 experimental DomainKeys support:
3834 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3835 (2) On an error such as an illegally used "control", the wrong name for
3836 the control was given.
3838 These problems did NOT occur unless DomainKeys support was compiled.
3840 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3842 PH/24 Added ${if match_ip condition.
3844 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3845 databases so that it will be absolutely obvious if a crash occurs in the
3846 DB library. This is a regular occurrence (often caused by mis-matched
3849 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3850 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3851 picked up on a user's system that detects such things. There doesn't seem
3852 to be a gcc warning option for this - only an attribute that has to be
3853 put on the function's prototype. It seems that in Fedora Core 4 they have
3854 set this on a number of new functions. No doubt there will be more in due
3857 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3858 specify a transport. However, if an address that was verified by such a
3859 router was the subject of a callout, Exim crashed because it tried to
3860 read the rcpt_include_affixes from the non-existent transport. Now it
3861 just assumes that the setting of that option is false. This bug was
3862 introduced by 4.51/PH/31.
3864 PH/28 Changed -d+all to exclude +memory, because that information is very
3865 rarely of interest, but it makes the output a lot bigger. People tend to
3866 do -d+all out of habit.
3868 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3869 code in os-type was giving problems when libc.so lives in lib64, like on
3872 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3873 aren't the modern standard, and it seems that some systems' include files
3874 don't always have them. Exim was already checking for some of the newer
3875 ones like T_AAAA, and defining it itself. I've added checks for all the
3876 record types that Exim uses.
3878 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3879 not automatically generating a new one, as it is supposed to. This
3880 prevented TLS from working. If the file did exist, but contained invalid
3881 data, a new version was generated, as expected. It was only the case of a
3882 non-existent file that was broken.
3884 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3885 with a change in libdomainkeys > 0.64.
3887 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3888 from DNS. If the selector record carries the flag, it now has
3889 precedence over the domain-wide flag.
3891 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3893 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3894 the use of a port name that isn't defined in /etc/services) occurred, the
3895 message was deferred as in a normal delivery, and thus remained on the
3896 spool, instead of being failed because of the mua_wrapper setting. This
3897 is now fixed, and I tidied up some of the mua_wrapper messages at the
3900 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3901 the messages in a hash of arrays rather than using individual hashes.
3902 This is a bit cleaner and results in dramatic memory savings, albeit
3903 at a slight CPU cost.
3905 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3906 as requested by Marc Sherman.
3908 SC/10 Eximstats: added histograms for user specified patterns as requested
3911 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3913 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3914 fopen() in the content-scanning modules that did not already have it.
3920 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3921 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3923 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3925 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3927 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3928 to test Sieve filters that use "vacation".
3930 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3931 that changes the way the GnuTLS parameters are stored in the cache file.
3932 The new format can be generated externally. For backward compatibility,
3933 if the data in the cache doesn't make sense, Exim assumes it has read an
3934 old-format file, and it generates new data and writes a new file. This
3935 means that you can't go back to an older release without removing the
3938 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3939 work if there are any delivery delays because "one_time" forces the
3940 parent to be marked "delivered", so its unseen clone is never tried
3941 again. For this reason, Exim now forbids the simultaneous setting of
3944 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3945 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3946 entry if you want to know the details. The fix, however, neglected to
3947 consider the case when local delivery batching is involved. The test for
3948 "previously delivered" was not happening when checking to see if an
3949 address could be batched with a previous (undelivered) one; under
3950 certain circumstances this could lead to multiple deliveries to the same
3953 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3954 in its include files, and this causes problems building Exim.
3956 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3957 header_syntax) but Exim was just ignoring anything given after a slash.
3958 In particular, this caused confusion with an attempt to use "verify =
3959 reverse_host_lookup/defer_ok". An error is now given when options are
3960 supplied for verify items that do not have them. (Maybe reverse_host_
3961 lookup should have a defer_ok option, but that's a different point.)
3963 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3964 defined by RFC 821) to 2048, because there were problems with some AUTH
3965 commands, and RFC 1869 says the size should be increased for extended
3966 SMTP commands that take arguments.
3968 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3971 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3972 "unknown" error; now it says that the functionality isn't in the binary.
3974 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3975 an address' error message when a string expansion fails (syntax or
3976 whatever). Otherwise the password may appear in the log. Following change
3977 PH/42 below, there is no longer a chance of it appearing in a bounce
3980 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3982 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3983 of its addresses was ever tried. (Bugzilla bug #2.)
3985 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3986 the result incorrectly in the debug output. (It correctly added a newline
3987 to what was transported.)
3989 TF/01 Added $received_time.
3991 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3992 commented out examples of how to interface to a virus scanner and to
3993 SpamAssassin. Also added commented examples of av_scanner and
3994 spamd_address settings.
3996 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3997 and controls are allowed in which ACLs. There were a couple of minor
3998 errors. Some of the entries in the conditions table (which is a table of
3999 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4000 negation of where the condition IS allowed.
4002 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4004 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4005 header file does not have a version number, so I've had to invent a new
4006 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4007 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4008 radiusclient), but it was contributed by a Radius user.
4010 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4011 files or directories, for OpenSSL.
4013 PH/19 When an Exim process that is running as root has to create an Exim log
4014 file, it does so in a subprocess that runs as exim:exim so as to get the
4015 ownership right at creation (otherwise, other Exim processes might see
4016 the file with the wrong ownership). There was no test for failure of this
4017 fork() call, which would lead to the process getting stuck as it waited
4018 for a non-existent subprocess. Forks do occasionally fail when resources
4019 run out. I reviewed all the other calls to fork(); they all seem to check
4022 PH/20 When checking for unexpected SMTP input at connect time (before writing
4023 the banner), Exim was not dealing correctly with a non-positive return
4024 from the read() function. If the client had disconnected by this time,
4025 the result was a log entry for a synchronization error with an empty
4026 string after "input=" when read() returned zero. If read() returned -1
4027 (an event I could not check), uninitialized data bytes were printed.
4028 There were reports of junk text (parts of files, etc) appearing after
4031 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4033 PH/22 Added support for macro redefinition, and (re)definition in between
4034 driver and ACL definitions.
4036 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4037 forgetting to use the resulting value; it was using the unexpanded value.
4039 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4040 hadn't been configured. The fix is from Juergen Kreileder, who
4041 understands it better than I do:
4043 "Here's what I see happening with three configured cyrus_sasl
4044 authenticators configured (plain, login, cram-md5):
4046 On startup auth_cyrus_sasl_init() gets called for each of these.
4047 This means three calls to sasl_listmech() without a specified mech_list.
4048 => SASL tests which mechs of all available mechs actually work
4049 => three warnings about OTP not working
4050 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4052 With the patch, sasl_listmech() also gets called three times. But now
4053 SASL's mech_list option is set to the server_mech specified in the the
4054 authenticator. Or in other words, the answer from sasl_listmech()
4055 gets limited to just the mech you're testing for (which is different
4057 => the return list contains just 'plain' or 'login', 'cram-md5' or
4058 nothing depending on the value of ob->server_mech.
4060 I've just tested the patch: Authentication still works fine,
4061 unavailable mechs specified in the exim configuration are still
4062 caught, and the auth.log warnings about OTP are gone."
4064 PH/25 When debugging is enabled, the contents of the command line are added
4065 to the debugging output, even when log_selector=+arguments is not
4068 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4069 answer is "GNU", and only if the return is "GNU/something" is the answer
4072 PH/27 $acl_verify_message is now set immediately after the failure of a
4073 verification in an ACL, and so is available in subsequent modifiers. In
4074 particular, the message can be preserved by coding like this:
4076 warn !verify = sender
4077 set acl_m0 = $acl_verify_message
4079 Previously, $acl_verify_message was set only while expanding "message"
4080 and "log_message" when a very denied access.
4082 PH/28 Modified OS/os.c-Linux with
4084 -#ifndef OS_LOAD_AVERAGE
4085 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4087 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4088 nomenclature these days.)
4090 PH/29 Installed patch from the Sieve maintainer that adds the options
4091 sieve_useraddress and sieve_subaddress to the redirect router.
4093 PH/30 In these circumstances:
4094 . Two addresses routed to the same list of hosts;
4095 . First host does not offer TLS;
4096 . First host accepts first address;
4097 . First host gives temporary error to second address;
4098 . Second host offers TLS and a TLS session is established;
4099 . Second host accepts second address.
4100 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4101 and peerdn, if requested) that were in fact used only for the second
4104 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4105 attention to any local part prefix or suffix that was matched by the
4106 router that accepted the address. It now behaves in the same way as it
4107 does for delivery: the affixes are removed from the local part unless
4108 rcpt_include_affixes is set on the transport.
4110 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4111 timeout during the DATA phase of an incoming message.
4113 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4114 applied a patch sanctioned by the Sieve maintainer.
4116 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4117 the uid or gid is negative. A case of a negative gid caused this to be
4118 noticed. The fix allows for either to be negative.
4120 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4121 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4124 PH/36 The change PH/12 above was broken. Fixed it.
4126 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4127 the grounds that routing the same address twice would always produce the
4128 same answer. This might have been true once, but it is certainly no
4129 longer true now. Routing a child address may depend on the previous
4130 routing that produced that child. Some complicated redirection strategies
4131 went wrong when messages had multiple recipients, and made Exim's
4132 behaviour dependent on the order in which the addresses were given.
4134 I have moved the duplicate checking until after the routing is complete.
4135 Exim scans the addresses that are assigned to local and remote
4136 transports, and removes any duplicates. This means that more work will be
4137 done, as duplicates will always all be routed, but duplicates are
4138 presumably rare, so I don't expect this is of any significance.
4140 For deliveries to pipes, files, and autoreplies, the duplicate checking
4141 still happens during the routing process, since they are not going to be
4144 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4145 It corrects a timeout issue with spamd. This is Ian's comment: "The
4146 background is that sometimes spamd either never reads data from a
4147 connection it has accepted, or it never writes response data. The exiscan
4148 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4149 blindly assumes that writes won't block so it may never time out."
4151 PH/39 Allow G after quota size as well as K and M.
4153 PH/40 The value set for $authenticated_id in an authenticator may not contain
4154 binary zeroes or newlines because the value is written to log lines and
4155 to spool files. There was no check on this. Now the value is run through
4156 the string_printing() function so that such characters are converted to
4157 printable escape sequences.
4159 PH/41 $message_linecount is a new variable that contains the total number of
4160 lines in the message. Compare $body_linecount, which is the count for the
4163 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4164 bounce and delay warning messages, except in certain special cases, which
4167 (a) An SMTP error message from a remote host;
4168 (b) A message specified in a :fail: redirection;
4169 (c) A message specified in a "fail" command in a system filter;
4170 (d) A message specified in a FAIL return from the queryprogram router;
4171 (e) A message specified by the cannot_route_message router option.
4173 In these cases only, Exim does include the error details in bounce and
4174 warning messages. There are also a few cases where bland messages such
4175 as "unrouteable address" or "local delivery error" are given.
4177 PH/43 $value is now also set for the "else" part of a ${run expansion.
4179 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4180 being worked on, but at least Exim now implements the latest version to
4183 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4184 process to complete was treated as a delivery failure, a timeout while
4185 writing the message to the pipe was logged, but erroneously treated as a
4186 successful delivery. Such timeouts include transport filter timeouts. For
4187 consistency with the overall process timeout, these timeouts are now
4188 treated as errors, giving rise to delivery failures by default. However,
4189 there is now a new Boolean option for the pipe transport called
4190 timeout_defer, which, if set TRUE, converts the failures into defers for
4191 both kinds of timeout. A transport filter timeout is now identified in
4194 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4195 systems where "make" and "gmake" are different, calling "gmake" at top
4196 level broke things. I've arranged for the value of $(MAKE) to be passed
4197 from the Makefile to this script so that it can call the same version of
4201 A note about Exim versions 4.44 and 4.50
4202 ----------------------------------------
4204 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4205 changes of various kinds. As a consequence, a big documentation update was
4206 needed. This delayed the release for rather longer than seemed good, especially
4207 in the light of a couple of (minor) security issues. Therefore, the changes
4208 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4209 release. So 4.44 and 4.50 are in effect two different branches that both start
4212 I have left the 4.50 change log unchanged; it contains all the changes since
4213 4.43. The change log for 4.44 is below; many of its items are identical to
4214 those for 4.50. This seems to be the most sensible way to preserve the
4215 historical information.
4221 1. Minor wording change to the doc/README.SIEVE file.
4223 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4224 computation of the current number of files was incorrect.
4226 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4227 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4230 4. Give more explanation in the error message when the command for a transport
4231 filter fails to execute.
4233 5. There are several places where Exim runs a non-Exim command in a
4234 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4235 was being done only for the command run by the queryprogram router. It is
4236 now done for all such subprocesses. The other cases are: ${run, transport
4237 filters, and the commands run by the lmtp and pipe transports.
4239 6. Added CONFIGURE_GROUP build-time option.
4241 7. Some older OS have a limit of 256 on the maximum number of file
4242 descriptors. Exim was using setrlimit() to set 1000 as a large value
4243 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4244 systems. I've change it so that if it can't get 1000, it tries for 256.
4246 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4247 was an oversight, and furthermore, ever since the addition of extra
4248 controls (e.g. 4.43/32), the checks on when to allow different forms of
4249 "control" were broken. There should now be diagnostics for all cases when a
4250 control that does not make sense is encountered.
4252 9. Added the /retain_sender option to "control=submission".
4254 10. $recipients is now available in the predata ACL (oversight).
4256 11. Tidy the search cache before the fork to do a delivery from a message
4257 received from the command line. Otherwise the child will trigger a lookup
4258 failure and thereby defer the delivery if it tries to use (for example) a
4259 cached ldap connection that the parent has called unbind on.
4261 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4262 of $address_data from the recipient verification was clobbered by the
4263 sender verification.
4265 13. The value of address_data from a sender verification is now available in
4266 $sender_address_data in subsequent conditions in the ACL statement.
4268 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4270 15. Added a new option "connect=<time>" to callout options, to set a different
4273 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4274 was its contents. (It was OK if the option was not defined at all.)
4276 17. A "Completed" log line is now written for messages that are removed from
4277 the spool by the -Mrm option.
4279 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4280 information about exactly what failed.
4282 19. Added -dd to debug only the daemon process.
4284 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4285 handles timeouts, both on the server side and network timeouts. Renamed the
4286 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4288 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4289 It is now set to "smtps".
4291 22. $host_address is now set to the target address during the checking of
4292 ignore_target_hosts.
4294 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4295 being passed; this would have caused $sender_host_name to have been used if
4296 matching the list had actually called for a host name (not very likely,
4297 since this list is usually IP addresses). A host name is now passed as
4300 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4301 code that specifies a non-restarting handler (typically sigaction() in
4302 modern systems) in an attempt to fix a rare and obscure crash bug.
4304 25. Narrowed the window for a race in the daemon that could cause it to ignore
4305 SIGCHLD signals. This is not a major problem, because they are used only to
4306 wake it up if nothing else does.
4308 26. A malformed maildirsize file could cause Exim to calculate negative values
4309 for the mailbox size or file count. Odd effects could occur as a result.
4310 The maildirsize information is now recalculated if the size or filecount
4313 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4314 support for a long time. Removed HAVE_SYS_VFS_H.
4316 28. Installed the latest version of exipick from John Jetmore.
4318 29. In an address list, if the pattern was not a regular expression, an empty
4319 subject address (from a bounce message) matched only if the pattern was an
4320 empty string. Non-empty patterns were not even tested. This was the wrong
4321 because it is perfectly reasonable to use an empty address as part of a
4322 database query. An empty address is now tested by patterns that are
4323 lookups. However, all the other forms of pattern expect the subject to
4324 contain a local part and a domain, and therefore, for them, an empty
4325 address still always fails if the pattern is not itself empty.
4327 30. Exim went into a mad DNS loop when attempting to do a callout where the
4328 host was specified on an smtp transport, and looking it up yielded more
4329 than one IP address.
4331 31. Re-factored the code for checking spool and log partition space into a
4332 function that finds that data and another that does the check. The former
4333 is then used to implement four new variables: $spool_space, $log_space,
4334 $spool_inodes, and $log_inodes.
4336 32. The RFC2047 encoding function was originally intended for short strings
4337 such as real names; it was not keeping to the 75-character limit for
4338 encoded words that the RFC imposes. It now respects the limit, and
4339 generates multiple encoded words if necessary. To be on the safe side, I
4340 have increased the buffer size for the ${rfc2047: expansion operator from
4343 33. It is now permitted to omit both strings after an "if" condition; if the
4344 condition is true, the result is "true". As before, when the second string
4345 is omitted, a false condition yields an empty string. This makes it less
4346 cumbersome to write custom ACL and router conditions.
4348 34. Failure to deliver a bounce message always caused it to be frozen, even if
4349 there was an errors_to setting on the router. The errors_to setting is now
4352 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4353 canonical form (fully expanded) before being placed in
4354 $sender_host_address.
4356 36. The table in the code that translates DNS record types into text (T_A to
4357 "A" for instance) was missing entries for NS and CNAME. It is just possible
4358 that this could have caused confusion if both these types were looked up
4359 for the same domain, because the text type is used as part of Exim's
4360 per-process caching. But the chance of anyone hitting this buglet seems
4363 37. The dnsdb lookup has been extended in a number of ways.
4365 (1) There is a new type, "zns", which walks up the domain tree until it
4366 finds some nameserver records. It should be used with care.
4368 (2) There is a new type, "mxh", which is like "mx" except that it returns
4369 just the host names, not the priorities.
4371 (3) It is now possible to give a list of domains (or IP addresses) to be
4372 looked up. The behaviour when one of the lookups defers can be
4373 controlled by a keyword.
4375 (4) It is now possible to specify the separator character for use when
4376 multiple records are returned.
4378 38. The dnslists ACL condition has been extended: it is now possible to supply
4379 a list of IP addresses and/or domains to be looked up in a particular DNS
4382 39. Added log_selector=+queue_time_overall.
4384 40. When running the queue in the test harness, wait just a tad after forking a
4385 delivery process, to get repeatability of debugging output.
4387 41. Include certificate and key file names in error message when GnuTLS fails
4388 to set them up, because the GnuTLS error message doesn't include the name
4389 of the failing file when there is a problem reading it.
4391 42. Allow both -bf and -bF in the same test run.
4393 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4395 44. The "Exiscan patch" is now merged into the mainline Exim source.
4397 45. Sometimes the final signoff response after QUIT could fail to get
4398 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4399 < 0 before doing a fflush(). This bug looks as though it goes back to the
4400 introduction of TLS in release 3.20, but "sometimes" must have been rare
4401 because the tests only now provoked it.
4403 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4404 (this can affect the format of dates).
4406 47. exim_tidydb, when checking for the continued existence of a message for
4407 which it has found a message-specific retry record, was not finding
4408 messages that were in split spool directories. Consequently, it was
4409 deleting retry records that should have stayed in existence.
4411 48. Steve fixed some bugs in eximstats.
4413 49. The SPA authentication driver was not abandoning authentication and moving
4414 on to the next authenticator when an expansion was forced to fail,
4415 contradicting the general specification for all authenticators. Instead it
4416 was generating a temporary error. It now behaves as specified.
4418 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4419 (the order specifies the preference for clients). The order is now AES256,
4420 AES128, 3DES, ARCFOUR128.
4422 51. Small patch to Sieve code - explicitly set From: when generating an
4425 52. Exim crashed if a remote delivery caused a very long error message to be
4426 recorded - for instance if somebody sent an entire SpamAssassin report back
4427 as a large number of 550 error lines. This bug was coincidentally fixed by
4428 increasing the size of one of Exim's internal buffers (big_buffer) that
4429 happened as part of the Exiscan merge. However, to be on the safe side, I
4430 have made the code more robust (and fixed the comments that describe what
4433 53. Now that there can be additional text after "Completed" in log lines (if
4434 the queue_time_overall log selector is set), a one-byte patch to exigrep
4435 was needed to allow it to recognize "Completed" as not the last thing in
4438 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4439 patch that reportedly fixes this has been added. I am not expert enough to
4440 create a test for it. This is what the patch creator wrote:
4442 "I found a little strange behaviour of ldap code when working with
4443 Windows 2003 AD Domain, where users was placed in more than one
4444 Organization Units. When I tried to give exim partial DN, the exit code
4445 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4446 But simultaneously result of request was absolutely normal ldap result,
4447 so I produce this patch..."
4449 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4450 REFERENCE, so I have modified the code to exclude the patch when that macro
4453 55. Some experimental protocols are using DNS PTR records for new purposes. The
4454 keys for these records are domain names, not reversed IP addresses. The
4455 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4456 leaves it alone. Component reversal etc. now happens only for IP addresses.
4459 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4461 57. Double the size of the debug message buffer (to 2048) so that more of very
4462 long debug lines gets shown.
4464 58. The exicyclog utility now does better if the number of log files to keep
4465 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4467 59. Two changes related to the smtp_active_hostname option:
4469 (1) $smtp_active_hostname is now available as a variable.
4470 (2) The default for smtp_banner uses $smtp_active_hostname instead
4471 of $primary_hostname.
4473 60. The host_aton() function is supposed to be passed a string that is known
4474 to be a valid IP address. However, in the case of IPv6 addresses, it was
4475 not checking this. This is a hostage to fortune. Exim now panics and dies
4476 if the condition is not met. A case was found where this could be provoked
4477 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4478 components; fortuitously, this particular loophole had already been fixed
4479 by change 4.50/55 above.
4481 If there are any other similar loopholes, the new check in host_aton()
4482 itself should stop them being exploited. The report I received stated that
4483 data on the command line could provoke the exploit when Exim was running as
4484 exim, but did not say which command line option was involved. All I could
4485 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4486 running as the user.
4489 61. There was a buffer overflow vulnerability in the SPA authentication code
4490 (which came originally from the Samba project). I have added a test to the
4491 spa_base64_to_bits() function which I hope fixes it.
4494 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4495 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4497 63. The daemon start-up calls getloadavg() while still root for those OS that
4498 need the first call to be done as root, but it missed one case: when
4499 deliver_queue_load_max is set with deliver_drop_privilege. This is
4500 necessary for the benefit of the queue runner, because there is no re-exec
4501 when deliver_drop_privilege is set.
4503 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4504 This has been fixed.
4506 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4507 was in use, was not putting the data itself into the right store pool;
4508 consequently, it could be overwritten for a subsequent message in the same
4509 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4512 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4514 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4515 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4516 the function were treating the return as a boolean value, which happened to
4517 work because 0=false and not-0=true, but is not correct code.
4519 68. The host_aton() function was not handling scoped IPv6 addresses (those
4520 with, for example, "%eth0" on the end) correctly.
4522 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4523 negated items (that is, ~something) in unsigned ints. Some compilers
4524 apparently mutter when there is no cast.
4526 70. If an address verification called from an ACL failed, and did not produce a
4527 user-specific message (i.e. there was only a "system" message), nothing was
4528 put in $acl_verify_message. In this situation, it now puts the system
4531 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4532 session; change 4.31/43 added the unwanted input to the log line - except
4533 that it did not do this in the start of session case. It now does.
4535 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4536 This is wrong and can cause the other end to generate a synchronization
4537 error if it is another Exim or anything else that does the synchronization
4538 check. A QUIT command is no longer sent after a timeout.
4540 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4541 during host lookups.
4543 74. The defer_ok option of callout verification was not working if it was used
4544 when verifying addresses in header lines, that is, for this case:
4546 verify = header_sender/callout=defer_ok
4548 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4549 those file descriptors could be used for SMTP connections. If anything
4550 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4551 could be sent to the SMTP client, causing chaos. The daemon now opens
4552 stdin, stdout, and stderr to /dev/null when it puts itself into the
4555 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4556 log by default. The user can override this with suitable Perl magic.
4558 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4559 the log message when discard triggers, was not working for the DATA ACL or
4560 for the non-SMTP ACL.
4562 78. Error message wording change in sieve.c.
4564 79. If smtp_accept_max_per_host was set, the number of connections could be
4565 restricted to fewer than expected, because the daemon was trying to set up
4566 a new connection before checking whether the processes handling previous
4567 connections had finished. The check for completed processes is now done
4568 earlier. On busy systems, this bug wouldn't be noticed because something
4569 else would have woken the daemon, and it would have reaped the completed
4572 80. If a message was submitted locally by a user whose login name contained one
4573 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4574 It caused a spool format error. I have fixed the spool reading code. A
4575 related problem was that the "from" clause in the Received: line became
4576 illegal because of the space(s). It is now covered by ${quote_local_part.
4578 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4581 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4583 83. Patch from Sieve maintainer to fix unterminated string problem in
4584 "vacation" handling.
4586 84. Some minor changes to the Linux configuration files to help with other
4587 OS variants using glibc.
4589 85. One more patch for Sieve to update vacation handling to latest spec.
4592 ----------------------------------------------------
4593 See the note above about the 4.44 and 4.50 releases.
4594 ----------------------------------------------------
4600 1. Change 4.43/35 introduced a bug that caused file counts to be
4601 incorrectly computed when quota_filecount was set in an appendfile
4604 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4605 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4608 3. Give more explanation in the error message when the command for a transport
4609 filter fails to execute.
4611 4. There are several places where Exim runs a non-Exim command in a
4612 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4613 was being done only for the command run by the queryprogram router. It is
4614 now done for all such subprocesses. The other cases are: ${run, transport
4615 filters, and the commands run by the lmtp and pipe transports.
4617 5. Some older OS have a limit of 256 on the maximum number of file
4618 descriptors. Exim was using setrlimit() to set 1000 as a large value
4619 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4620 systems. I've change it so that if it can't get 1000, it tries for 256.
4622 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4623 was an oversight, and furthermore, ever since the addition of extra
4624 controls (e.g. 4.43/32), the checks on when to allow different forms of
4625 "control" were broken. There should now be diagnostics for all cases when a
4626 control that does not make sense is encountered.
4628 7. $recipients is now available in the predata ACL (oversight).
4630 8. Tidy the search cache before the fork to do a delivery from a message
4631 received from the command line. Otherwise the child will trigger a lookup
4632 failure and thereby defer the delivery if it tries to use (for example) a
4633 cached ldap connection that the parent has called unbind on.
4635 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4636 of $address_data from the recipient verification was clobbered by the
4637 sender verification.
4639 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4640 was its contents. (It was OK if the option was not defined at all.)
4642 11. A "Completed" log line is now written for messages that are removed from
4643 the spool by the -Mrm option.
4645 12. $host_address is now set to the target address during the checking of
4646 ignore_target_hosts.
4648 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4649 being passed; this would have caused $sender_host_name to have been used if
4650 matching the list had actually called for a host name (not very likely,
4651 since this list is usually IP addresses). A host name is now passed as
4654 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4655 code that specifies a non-restarting handler (typically sigaction() in
4656 modern systems) in an attempt to fix a rare and obscure crash bug.
4658 15. Narrowed the window for a race in the daemon that could cause it to ignore
4659 SIGCHLD signals. This is not a major problem, because they are used only to
4660 wake it up if nothing else does.
4662 16. A malformed maildirsize file could cause Exim to calculate negative values
4663 for the mailbox size or file count. Odd effects could occur as a result.
4664 The maildirsize information is now recalculated if the size or filecount
4667 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4668 support for a long time. Removed HAVE_SYS_VFS_H.
4670 18. Updated exipick to current release from John Jetmore.
4672 19. Allow an empty sender to be matched against a lookup in an address list.
4673 Previously the only cases considered were a regular expression, or an
4676 20. Exim went into a mad DNS lookup loop when doing a callout where the
4677 host was specified on the transport, if the DNS lookup yielded more than
4680 21. The RFC2047 encoding function was originally intended for short strings
4681 such as real names; it was not keeping to the 75-character limit for
4682 encoded words that the RFC imposes. It now respects the limit, and
4683 generates multiple encoded words if necessary. To be on the safe side, I
4684 have increased the buffer size for the ${rfc2047: expansion operator from
4687 22. Failure to deliver a bounce message always caused it to be frozen, even if
4688 there was an errors_to setting on the router. The errors_to setting is now
4691 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4692 canonical form (fully expanded) before being placed in
4693 $sender_host_address.
4695 24. Updated eximstats to version 1.33
4697 25. Include certificate and key file names in error message when GnuTLS fails
4698 to set them up, because the GnuTLS error message doesn't include the name
4699 of the failing file when there is a problem reading it.
4701 26. Expand error message when OpenSSL has problems setting up cert/key files.
4704 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4705 (this can affect the format of dates).
4707 28. exim_tidydb, when checking for the continued existence of a message for
4708 which it has found a message-specific retry record, was not finding
4709 messages that were in split spool directories. Consequently, it was
4710 deleting retry records that should have stayed in existence.
4712 29. eximstats updated to version 1.35
4713 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4714 1.35 - bugfix such that pie charts by volume are generated correctly
4716 30. The SPA authentication driver was not abandoning authentication and moving
4717 on to the next authenticator when an expansion was forced to fail,
4718 contradicting the general specification for all authenticators. Instead it
4719 was generating a temporary error. It now behaves as specified.
4721 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4722 (the order specifies the preference for clients). The order is now AES256,
4723 AES128, 3DES, ARCFOUR128.
4725 31. Small patch to Sieve code - explicitly set From: when generating an
4728 32. Exim crashed if a remote delivery caused a very long error message to be
4729 recorded - for instance if somebody sent an entire SpamAssassin report back
4730 as a large number of 550 error lines. This bug was coincidentally fixed by
4731 increasing the size of one of Exim's internal buffers (big_buffer) that
4732 happened as part of the Exiscan merge. However, to be on the safe side, I
4733 have made the code more robust (and fixed the comments that describe what
4736 33. Some experimental protocols are using DNS PTR records for new purposes. The
4737 keys for these records are domain names, not reversed IP addresses. The
4738 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4739 leaves it alone. Component reversal etc. now happens only for IP addresses.
4742 34. The host_aton() function is supposed to be passed a string that is known
4743 to be a valid IP address. However, in the case of IPv6 addresses, it was
4744 not checking this. This is a hostage to fortune. Exim now panics and dies
4745 if the condition is not met. A case was found where this could be provoked
4746 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4747 components; fortuitously, this particular loophole had already been fixed
4748 by change 4.50/55 or 4.44/33 above.
4750 If there are any other similar loopholes, the new check in host_aton()
4751 itself should stop them being exploited. The report I received stated that
4752 data on the command line could provoke the exploit when Exim was running as
4753 exim, but did not say which command line option was involved. All I could
4754 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4755 running as the user.
4758 35. There was a buffer overflow vulnerability in the SPA authentication code
4759 (which came originally from the Samba project). I have added a test to the
4760 spa_base64_to_bits() function which I hope fixes it.
4763 36. The daemon start-up calls getloadavg() while still root for those OS that
4764 need the first call to be done as root, but it missed one case: when
4765 deliver_queue_load_max is set with deliver_drop_privilege. This is
4766 necessary for the benefit of the queue runner, because there is no re-exec
4767 when deliver_drop_privilege is set.
4769 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4770 was in use, was not putting the data itself into the right store pool;
4771 consequently, it could be overwritten for a subsequent message in the same
4772 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4775 38. Sometimes the final signoff response after QUIT could fail to get
4776 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4777 < 0 before doing a fflush(). This bug looks as though it goes back to the
4778 introduction of TLS in release 3.20, but "sometimes" must have been rare
4779 because the tests only now provoked it.
4785 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4786 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4787 Now it returns an integer. A number of calls were still expecting a T/F
4788 return. Fortuitously, in all cases, the tests worked in OK situations,
4789 which is the norm. However, things would have gone wrong on any write
4790 failures on the smtp file descriptor. This function is used when sending
4791 messages over SMTP and also when doing verify callouts.
4793 2. When Exim is called to do synchronous delivery of a locally submitted
4794 message (the -odf or -odi options), it no longer closes stderr before doing
4797 3. Implemented the mua_wrapper option.
4799 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4801 5. Implemented the functions header_remove(), header_testname(),
4802 header_add_at_position(), and receive_remove_recipient(), and exported them
4805 6. If an ACL "warn" statement specified the addition of headers, Exim already
4806 inserted X-ACL-Warn: at the start if there was no header name. However, it
4807 was not making this test for the second and subsequent header lines if
4808 there were newlines in the string. This meant that an invalid header could
4809 be inserted if Exim was badly configured.
4811 7. Allow an ACL "warn" statement to add header lines at the start or after all
4812 the Received: headers, as well as at the end.
4814 8. Added the rcpt_4xx retry error code.
4816 9. Added postmaster_mailfrom=xxx to callout verification option.
4818 10. Added mailfrom=xxxx to the callout verification option, for verify=
4821 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4822 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4824 12. Inserted some casts to stop certain compilers warning when using pointer
4825 differences as field lengths or precisions in printf-type calls (mostly
4826 affecting debugging statements).
4828 13. Added optional readline() support for -be (dynamically loaded).
4830 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4831 same clock tick as a message's arrival, so that its received time was the
4832 same as the "first fail" time on the retry record, and that message
4833 remained on the queue past the ultimate address timeout, every queue runner
4834 would try a delivery (because it was past the ultimate address timeout) but
4835 after another failure, the ultimate address timeout, which should have then
4836 bounced the address, did not kick in. This was a "< instead of <=" error;
4837 in most cases the first failure would have been in the next clock tick
4838 after the received time, and all would be well.
4840 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4841 being recognized when the domain list was tested by the match_domain
4842 condition in an expansion string.
4844 16. Added the ${str2b64: operator.
4846 17. Exim was always calling setrlimit() to set a large limit for the number of
4847 processes, without checking whether the existing limit was already
4848 adequate. (It did check for the limit on file descriptors.) Furthermore,
4849 errors from getrlimit() and setrlimit() were being ignored. Now they are
4850 logged to the main and panic logs, but Exim does carry on, to try to do its
4851 job under whatever limits there are.
4853 18. Imported PCRE 5.0.
4855 19. Trivial typo in log message " temporarily refused connection" (the leading
4858 20. If the log selector return_path_on_delivery was set and an address was
4859 redirected to /dev/null, the delivery process crashed because it assumed
4860 that a return path would always be set for a "successful" delivery. In this
4861 case, the whole delivery is bypassed as an optimization, and therefore no
4864 21. Internal re-arrangement: the function for sending a challenge and reading
4865 a response while authentication was assuming a zero-terminated challenge
4866 string. It's now changed to take a pointer and a length, to allow for
4867 binary data in such strings.
4869 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4871 23. Exim was not respecting finduser_retries when seeking the login of the
4872 uid under which it was called; it was always trying 10 times. (The default
4873 setting of finduser_retries is zero.) Also, it was sleeping after the final
4874 failure, which is pointless.
4876 24. Implemented tls_on_connect_ports.
4878 25. Implemented acl_smtp_predata.
4880 26. If the domain in control=submission is set empty, Exim assumes that the
4881 authenticated id is a complete email address when it generates From: or
4882 Sender: header lines.
4884 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4885 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4886 chown and chgrp in /bin and hostname in /usr/bin.
4888 28. Exim was keeping the "process log" file open after each use, just as it
4889 does for the main log. This opens the possibility of it remaining open for
4890 long periods when the USR1 signal hits a daemon. Occasional processlog
4891 errors were reported, that could have been caused by this. Anyway, it seems
4892 much more sensible not to leave this file open at all, so that is what now
4895 29. The long-running daemon process does not normally write to the log once it
4896 has entered its main loop, and it closes the log before doing so. This is
4897 so that log files can straightforwardly be renamed and moved. However,
4898 there are a couple of unusual error situations where the daemon does write
4899 log entries, and I had neglected to close the log afterwards.
4901 30. The text of an SMTP error response that was received during a remote
4902 delivery was being truncated at 512 bytes. This is too short for some of
4903 the long messages that one sometimes sees. I've increased the limit to
4906 31. It is now possible to make retry rules that apply only when a message has a
4907 specific sender, in particular, an empty sender.
4909 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4910 it possible to be selective about when SMTP synchronization is enforced.
4912 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4914 32. Implemented hosts_connection_nolog.
4916 33. Added an ACL for QUIT.
4918 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4921 35. Added mailbox_size and mailbox_filecount to appendfile.
4923 36. Added control = no_multiline_responses to ACLs.
4925 37. There was a bug in the logic of the code that waits for the clock to tick
4926 in the case where the clock went backwards by a substantial amount such
4927 that the microsecond fraction of "now" was more than the microsecond
4928 fraction of "then" (but the whole seconds number was less).
4930 38. Added support for the libradius Radius client library this is found on
4931 FreeBSD (previously only the radiusclient library was supported).
4937 1. When certain lookups returned multiple values in the form name=value, the
4938 quoting of the values was not always being done properly. Specifically:
4939 (a) If the value started with a double quote, but contained no whitespace,
4941 (b) If the value contained whitespace other than a space character (i.e.
4942 tabs or newlines or carriage returns) it was not quoted.
4943 This fix has been applied to the mysql and pgsql lookups by writing a
4944 separate quoting function and calling it from the lookup code. The fix
4945 should probably also be applied to nisplus, ibase and oracle lookups, but
4946 since I cannot test any of those, I have not disturbed their existing code.
4948 2. A hit in the callout cache for a specific address caused a log line with no
4949 reason for rejecting RCPT. Now it says "Previous (cached) callout
4950 verification failure".
4952 3. There was an off-by-one bug in the queryprogram router. An over-long
4953 return line was truncated at 256 instead of 255 characters, thereby
4954 overflowing its buffer with the terminating zero. As well as fixing this, I
4955 have increased the buffer size to 1024 (and made a note to document this).
4957 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4958 when Exim is waiting for an SMTP response from a remote server, Exim
4959 restarts its select() call on the socket, thereby resetting its timeout.
4960 This is not a problem when such interrupts are rare. Somebody set up a cron
4961 job to run exiwhat every 2 minutes, which is less than the normal select()
4962 timeout (5 or 10 minutes). This meant that the select() timeout never
4963 kicked in because it was always reset. I have fixed this by comparing the
4964 time when an interrupt arrives with the time at the start of the first call
4965 to select(). If more time than the timeout has elapsed, the interrupt is
4966 treated as a timeout.
4968 5. Some internal re-factoring in preparation for the addition of Sieve
4969 extensions (by MH). In particular, the "personal" test is moved to a
4970 separate function, and given an option for scanning Cc: and Bcc: (which is
4971 not set for Exim filters).
4973 6. When Exim created an email address using the login of the caller as the
4974 local part (e.g. when creating a From: or Sender: header line), it was not
4975 quoting the local part when it contained special characters such as @.
4977 7. Installed new OpenBSD configuration files.
4979 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4980 try to make them clearer.
4982 9. Callout options, other than the timeout value, were being ignored when
4983 verifying sender addresses in header lines. For example, when using
4985 verify = header_sender/callout=no_cache
4987 the cache was (incorrectly) being used.
4989 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4990 only the Cygwin environment.
4992 11. When return_path_on_delivery was set as a log selector, if different remote
4993 addresses in the same message used different return paths and parallel
4994 remote delivery occurred, the wrong values would sometimes be logged.
4995 (Whenever a remote delivery process finished, the return path value from
4996 the most recently started remote delivery process was logged.)
4998 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4999 lines when AUTH and/or TLS are in use. This is the "received protocol"
5000 field. Exim used to use "asmtp" for authenticated SMTP, without any
5001 indication (in the protocol name) for TLS use. Now it follows the RFC and
5002 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5003 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5004 names appear in log lines as well as in Received: header lines.
5006 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5007 extensions, and comparison tests, and to fix some bugs.
5009 14. Changes to the "personal" filter test:
5011 (1) The test was buggy in that it was just doing the equivalent of
5012 "contains" tests on header lines. For example, if a user's address was
5013 anne@some.where, the "personal" test would incorrectly be true for
5015 To: susanne@some.where
5017 This test is now done by extracting each address from the header in turn,
5018 and checking the entire address. Other tests that are part of "personal"
5019 are now done using regular expressions (for example, to check local parts
5020 of addresses in From: header lines).
5022 (2) The list of non-personal local parts in From: addresses has been
5023 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5024 taken from the Sieve specification recommendations.
5026 (3) If the message contains any header line starting with "List-" it is
5027 treated as non-personal.
5029 (4) The test for "circular" in the Subject: header line has been removed
5030 because it now seems ill-conceived.
5032 15. Minor typos in src/EDITME comments corrected.
5034 16. Installed latest exipick from John Jetmore.
5036 17. If headers_add on a router specified a text string that was too long for
5037 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5038 of string_sprintf() is now avoided.
5040 18. $message_body_size was not set (it was always zero) when running the DATA
5041 ACL and the local_scan() function.
5043 19. For the "mail" command in an Exim filter, no default was being set for
5044 the once_repeat time, causing a random time value to be used if "once" was
5045 specified. (If the value happened to be <= 0, no repeat happened.) The
5046 default is now 0s, meaning "never repeat". The "vacation" command was OK
5047 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5048 (I found it when inspecting the code).
5050 20. There is now an overall timeout for performing a callout verification. It
5051 defaults to 4 times the callout timeout, which applies to individual SMTP
5052 commands during the callout. The overall timeout applies when there is more
5053 than one host that can be tried. The timeout is checked before trying the
5054 next host. This prevents very long delays if there are a large number of
5055 hosts and all are timing out (e.g. when the network connections are timing
5056 out). The value of the overall timeout can be changed by specifying an
5057 additional sub-option for "callout", called "maxwait". For example:
5059 verify = sender/callout=5s,maxwait=20s
5061 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5062 to the end before writing, but this should make it even safer).
5064 22. Exim was forgetting that it had advertised PIPELINING for the second and
5065 subsequent messages on an SMTP connection. It was also not resetting its
5066 memory on STARTTLS and an internal HELO.
5068 23. When Exim logs an SMTP synchronization error within a session, it now
5069 records whether PIPELINING has been advertised or not.
5071 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5072 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5073 rather than long int.
5075 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5077 26. Added the never_mail option to autoreply.
5083 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5084 crash if the getsockname() call failed; this can happen if a connection is
5085 closed very soon after it is established. The problem was simply in the
5086 order in which certain operations were done, causing Exim to try to write
5087 to the SMTP stream before it had set up the file descriptor. The bug has
5088 been fixed by making things happen in the correct order.
5094 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5095 before the connection was closed, thus losing the rejection response.
5097 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5098 some early Solaris releases, but causes trouble in current releases where
5099 socklen_t is defined.
5101 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5104 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5107 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5108 that releasing the top of it at the end releases what was used for sub-
5109 expansions (unless the block got too big). However, discard this block if
5110 the first thing is a variable or header, so that we can use its block when
5111 it is dynamic (useful for very large $message_headers, for example).
5113 6. Lookups now cache *every* query, not just the most recent. A new, separate
5114 store pool is used for this. It can be recovered when all lookup caches are
5115 flushed. Lookups now release memory at the end of their result strings.
5116 This has involved some general refactoring of the lookup sources.
5118 7. Some code has been added to the store_xxx() functions to reduce the amount
5119 of flapping under certain conditions.
5121 8. log_incoming_interface used to affect only the <= reception log lines. Now
5122 it causes the local interface and port to be added to several more SMTP log
5123 lines, for example "SMTP connection from", and rejection lines.
5125 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5127 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5129 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5130 could be overwritten at the end of the current message (or the start of a
5131 new message if it was set in a HELO ACL). The value is now preserved for
5132 the duration of the SMTP connection.
5134 12. If a transport had a headers_rewrite setting, and a matching header line
5135 contained an unqualified address, that address was qualified, even if it
5136 did not match any rewriting rules. The underlying bug was that the values
5137 of the flags that permit the existence of unqualified sender and recipient
5138 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5139 non-local messages, and by -bnq for local messages) were not being
5140 preserved with the message after it was received.
5142 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5143 "next input=" as part of the text comprising the host identity instead of
5144 the correct text. The code was using the same buffer for two different
5145 strings. However, depending on which order the printing function evaluated
5146 its arguments, the bug did not always show up. Under Linux, for example, my
5147 test suite worked just fine.
5149 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5150 doesn't work with some older versions of Perl. It has been changed to "my",
5151 which in any case is probably the better facility to use.
5153 15. A really picky compiler found some instances of statements for creating
5154 error messages that either had too many or two few arguments for the format
5157 16. The size of the buffer for calls to the DNS resolver has been increased
5158 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5159 for addresses that have a lot of PTR records. This alleviates a problem; it
5160 does not fully solve it.
5162 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5163 buffer now truncates the list and logs the incident, which is the same
5164 action as happens when Exim is looking up a host name and its aliases.
5165 Previously in this situation something unpredictable would happen;
5166 sometimes it was "internal error: store_reset failed".
5168 18. If a server dropped the connection unexpectedly when an Exim client was
5169 using GnuTLS and trying to read a response, the client delivery process
5170 crashed while trying to generate an error log message.
5172 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5173 string, for example:
5175 warn message = H1: something\nH2: something
5177 the text was added as a single header line from Exim's point of view
5178 though it ended up OK in the delivered message. However, searching for the
5179 second and subsequent header lines using $h_h2: did not work. This has been
5180 fixed. Similarly, if a system filter added multiple headers in this way,
5181 the routers could not see them.
5183 20. Expanded the error message when iplsearch is called with an invalid key to
5184 suggest using net-iplsearch in a host list.
5186 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5187 ACLs are no longer actually imposed (and a message to that effect is
5190 22. If a "gecos" field in a passwd entry contained escaped characters, in
5191 particular, if it contained a \" sequence, Exim got it wrong when building
5192 a From: or a Sender: header from that name. A second bug also caused
5193 incorrect handling when an unquoted " was present following a character
5194 that needed quoting.
5196 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5197 was not being matched caselessly.
5199 24. Arranged for all hyphens in the exim.8 source to be escaped with
5202 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5203 properly. Recipient callout cache records were still being keyed to include
5204 the sender, even when use_sender was set false. This led to far more
5205 callouts that were necessary. The sender is no longer included in the key
5206 when use_sender is false.
5208 26. Added "control = submission" modifier to ACLs.
5210 27. Added the ${base62d: operator to decode base 62 numbers.
5212 28. dnsdb lookups can now access SRV records.
5214 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5215 the configuration file.
5217 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5218 (-v) mode. This makes the output for a verbose queue run more intelligible.
5220 31. Added a use_postmaster feature to recipient callouts.
5222 32. Added the $body_zerocount variable, containing the number of binary zero
5223 bytes in the message body.
5225 33. The time of last modification of the "new" subdirectory is now used as the
5226 "mailbox time last read" when there is a quota error for a maildir
5229 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5231 35. Added +ignore_unknown as a special item in host lists.
5233 36. Code for decoding IPv6 addresses in host lists is now included, even if
5234 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5235 address was recognized as an IP address, but was then not correctly decoded
5236 into binary, causing unexpected and incorrect effects when compared with
5243 1. Very minor rewording of debugging text in manualroute to say "list of
5244 hosts" instead of "hostlist".
5246 2. If verify=header_syntax was set, and a header line with an unqualified
5247 address (no domain) and a large number of spaces between the end of the
5248 name and the colon was received, the reception process suffered a buffer
5249 overflow, and (when I tested it) crashed. This was caused by some obsolete
5250 code that should have been removed. The fix is to remove it!
5252 3. When running in the test harness, delay a bit after writing a bounce
5253 message to get a bit more predictability in the log output.
5255 4. Added a call to search_tidyup() just before forking a reception process. In
5256 theory, someone could use a lookup in the expansion of smtp_accept_max_
5257 per_host which, without the tidyup, could leave open a database connection.
5259 5. Added the variables $recipient_data and $sender_data which get set from a
5260 lookup success in an ACL "recipients" or "senders" condition, or a router
5261 "senders" option, similar to $domain_data and $local_part_data.
5263 6. Moved the writing of debug_print from before to after the "senders" test
5266 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5267 problems for message scanning, either using a data ACL, or using
5268 local_scan() because the Received: header was not generated till after they
5269 were called (in order to set the time as the time of reception completion).
5270 I have revised the way this works. The header is now generated after the
5271 body is received, but before the ACL or local_scan() are called. After they
5272 are run, the timestamp in the header is updated.
5278 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5279 before starting a queue runner without re-exec. This happened only when
5280 deliver_drop_privilege was set or when the Exim user was set to root. The
5281 effect of the bug was that timeouts during subsequent deliveries caused
5282 crashes instead of being properly handled. The handler is now left at its
5283 default (and expected) setting.
5285 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5286 message, again when deliver_drop_privilege is set or Exim is run as root.
5287 The bug described in (1) was not present in this case, but the tidying up
5288 of the other signals was missing. I have made the two cases consistent.
5290 3. The ignore_target_hosts setting on a manualroute router was being ignored
5291 for hosts that were looked up using the /MX notation.
5293 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5296 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5297 operated on the sender address. After changing the $sender_address to <>
5298 for the sender address verify, Exim was re-instated it as the original
5299 (before rewriting) address, but remembering that it had rewritten it, so it
5300 wasn't rewriting it again. This bug also had the effect of breaking the
5301 sender address verification caching when the sender address was rewritten.
5303 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5304 This has been changed so that if the ip literal address matches
5305 ignore_target_hosts, the router declines.
5307 7. Added expansion conditions match_domain, match_address, and match_local_
5308 part (NOT match_host).
5310 8. The placeholder for the Received: header didn't have a length field set.
5312 9. Added code to Exim itself and to exim_lock to test for a specific race
5313 condition that could lead to file corruption when using MBX delivery. The
5314 issue is with the lockfile that is created in /tmp. If this file is removed
5315 after a process has opened it but before that process has acquired a lock,
5316 there is the potential for a second process to recreate the file and also
5317 acquire a lock. This could lead to two Exim processes writing to the file
5318 at the same time. The added code performs the same test as UW imapd; it
5319 checks after acquiring the lock that its file descriptor still refers to
5320 the same named file.
5322 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5323 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5326 11. Added the smtp_active_hostname option. If used, this will typically be made
5327 to depend on the incoming interface address. Because $interface_address is
5328 not set up until the daemon has forked a reception process, error responses
5329 that can happen earlier (such as "too many connections") no longer contain
5332 12. If an expansion in a condition on a "warn" statement fails because a lookup
5333 defers, the "warn" statement is abandoned, and the next ACL statement is
5334 processed. Previously this caused the whole ACL to be aborted.
5336 13. Added the iplsearch lookup type.
5338 14. Added ident_timeout as a log selector.
5340 15. Added tls_certificate_verified as a log selector.
5342 16. Added a global option tls_require_ciphers (compare the smtp transport
5343 option of the same name). This controls incoming TLS connections.
5345 17. I finally figured out how to make tls_require_ciphers do a similar thing
5346 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5347 before starting the TLS session.
5349 18. Tabs are now shown as \t in -bP output.
5351 19. If the log selector return_path_on_delivery was set, Exim crashed when
5352 bouncing a message because it had too many Received: header lines.
5354 20. If two routers both had headers_remove settings, and the first one included
5355 a superfluous trailing colon, the final name in the first list and the
5356 first name in the second list were incorrectly joined into one item (with a
5357 colon in the middle).
5363 1. Added -C and -D options to the exinext utility, mainly to make it easier
5364 to include in the automated testing, but these could be helpful when
5365 multiple configurations are in use.
5367 2. The exinext utility was not formatting the output nicely when there was
5368 an alternate port involved in the retry record key, nor when there was a
5369 message id as well (for retries that were specific to a specific message
5370 and a specific host). It was also confused by IPv6 addresses, because of
5371 the additional colons they contain. I have fixed the IPv4 problem, and
5372 patched it up to do a reasonable job for IPv6.
5374 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5375 delivery, the log line now contains "pipelined" if PIPELINING was used.
5377 4. An SMTP transport process used to panic and die if the bind() call to set
5378 an explicit outgoing interface failed. This has been changed; it is now
5379 treated in the same way as a connect() failure.
5381 5. A reference to $sender_host_name in the part of a conditional expansion
5382 that was being skipped was still causing a DNS lookup. This no longer
5385 6. The def: expansion condition was not recognizing references to header lines
5386 that used bh_ and bheader_.
5388 7. Added the _cache feature to named lists.
5390 8. The code for checking quota_filecount in the appendfile transport was
5391 allowing one more file than it should have been.
5393 9. For compatibility with Sendmail, the command line option
5401 and sets the incoming protocol and host name (for trusted callers). The
5402 host name and its colon can be omitted when only the protocol is to be set.
5403 Note the Exim already has two private options, -pd and -ps, that refer to
5404 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5405 "s", but I don't think that's a major issue.
5407 10. A number of refactoring changes to the code, none of which should affect
5410 (a) The number of logging options was getting close to filling up the
5411 32-bit word that was used as a bit map. I have split them into two classes:
5412 those that are passed in the argument to log_write(), and those that are
5413 only ever tested independently outside of that function. These are now in
5414 separate 32-bit words, so there is plenty of room for expansion again.
5415 There is no change in the user interface or the logging behaviour.
5417 (b) When building, for example, log lines, the code previously used a
5418 macro that called string_cat() twice, in order to add two strings. This is
5419 not really sufficiently general. Furthermore, there was one instance where
5420 it was actually wrong because one of the argument was used twice, and in
5421 one call a function was used. (As it happened, calling the function twice
5422 did not affect the overall behaviour.) The macro has been replaced by a
5423 function that can join an arbitrary number of extra strings onto a growing
5426 (c) The code for expansion conditions now uses a table and a binary chop
5427 instead of a serial search (which was left over from when there were very
5428 few conditions). Also, it now recognizes conditions like "pam" even when
5429 the relevant support is not compiled in: a suitably worded error message is
5430 given if an attempt is made to use such a condition.
5432 11. Added ${time_interval:xxxxx}.
5434 12. A bug was causing one of the ddress fields not to be passed back correctly
5435 from remote delivery subprocesses. The field in question was not being
5436 subsequently used, so this caused to problems in practice.
5438 13. Added new log selectors queue_time and deliver_time.
5440 14. Might have fixed a bug in maildirsizefile handling that threw up
5441 "unexpected character" debug warnings, and recalculated the data
5442 unnecessarily. In any case, I expanded the warning message to give more
5445 15. Added the message "Restricted characters in address" to the statements in
5446 the default ACL that block characters like @ and % in local parts.
5448 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5449 Three changes have been made:
5451 (a) There was a serious bug; a negative response to MAIL caused the whole
5452 recipient domain to be cached as invalid, thereby blocking all messages
5453 to all local parts at the same domain, from all senders. This bug has
5454 been fixed. The domain is no longer cached after a negative response to
5455 MAIL if the sender used is not empty.
5457 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5460 (c) A new callout option, "use_sender" has been added for people who want
5461 the modified behaviour.
5467 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5470 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5471 indeed breaks things for older releases.
5473 3. Added additional logging to the case where there is a problem reading data
5474 from a filter that is running in a subprocess using a pipe, in order to
5475 try to track down a specific problem.
5477 4. Testing facility fudge: when running in the test harness and attempting
5478 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5479 getting "No route to host". Convert this to a timeout.
5481 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5484 6. Some OS don't have socklen_t but use size_t instead. This affects the
5485 fifth argument of getsockopt() amongst other things. This is now
5486 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5487 can be set for individual OS. I have set it for SunOS5, OSF1, and
5488 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5489 some earlier ones do not.
5491 7. Change 4.30/15 was not doing the test caselessly.
5493 8. The standard form for an IPv6 address literal was being rejected by address
5494 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5495 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5496 this, as well as the form without the "IPv6" on the front (but only when
5497 address literals are enabled, of course).
5499 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5501 10. Exim crashed if a message with an empty sender address specified by -f
5502 encountered a router with an errors_to setting. This could be provoked only
5503 by a command such as
5507 where an empty string was supplied; "<>" did not hit this bug.
5509 11. Installed PCRE release 4.5.
5511 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5512 remained set. It is now erased.
5514 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5515 times from message ids (which are base 36 rather than the normal 62).
5517 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5518 were being counted as actual protocol errors, and logged if the log
5519 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5520 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5521 and DATA following a set of rejected RCPTs do not count as protocol errors.
5522 In other words, Exim assumes they were pipelined, though this may not
5523 actually be the case. Of course, in all cases the client gets an
5524 appropriate error code.
5526 15. If a lookup fails in an ACL condition, a message about the failure may
5527 be available; it is used if testing the ACL cannot continue, because most
5528 such messages specify what the cause of the deferral is. However, some
5529 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5530 that caused an old message to be retained and used if a later statement
5531 caused a defer, replacing the real cause of the deferral.
5533 16. If an IP address had so many PTR records that the DNS lookup buffer
5534 was not large enough to hold them, Exim could crash while trying to process
5535 the truncated data. It now detects and logs this case.
5537 17. Further to 4.21/58, another change has been made: if (and only if) the
5538 first line of a message (the first header line) ends with CRLF, a bare LF
5539 in a subsequent header line has a space inserted after it, so as not to
5540 terminate the header.
5542 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5543 unnecessarily, used atoi() instead of strtol(), and didn't check the
5544 termination when getting file sizes from file names by regex.
5546 19. Completely re-implemented the support for maildirsize files, in the light
5547 of a number of problems with the previous contributed implementation
5548 (4.30/29). In particular:
5550 . If the quota is zero, the maildirsize file is maintained, but no quota is
5553 . If the maildir directory does not exist, it is created before any attempt
5554 to write a maildirsize file.
5556 . The quota value in the file is just a cache; if the quota is changed in
5557 the transport, the new value overrides.
5559 . A regular expression is available for excluding directories from the
5562 20. The autoreply transport checks the characters in options that define the
5563 message's headers; it allows continued headers, but it was checking with
5564 isspace() after an embedded newline instead of explicitly looking for a
5567 21. If all the "regular" hosts to which an address was routed had passed their
5568 expiry times, and had not reached their retry times, the address was
5569 bounced, even if fallback hosts were defined. Now Exim should go on to try
5572 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5573 equivalent code in the SMTP transport. Some hosts send humungous responses
5574 to HELO/EHLO, more than 1024 it seems.
5576 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5577 gives compiler warnings in some environments. I've now done it "properly",
5580 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5581 (because of problems with the built-in one) was declared to return uschar *
5582 instead of char *, causing compiler failure.
5584 25. Fixed a file descriptor leak when processing alias/forward files.
5586 26. Fixed a minor format string issue in dbfn.c.
5588 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5590 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5591 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5594 29. When a sender address is verified, it is cached, to save repeating the test
5595 when there is more than one recipient in a message. However, when the
5596 verification involves a callout, it is possible for different callout
5597 options to be set for different recipients. It is too complicated to keep
5598 track of this in the cache, so now Exim always runs a verification when a
5599 callout is required, relying on the callout cache for the optimization.
5600 The overhead is duplication of the address routing, but this should not be
5603 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5604 to be verified with callout=postmaster, and the main callout worked but the
5605 postmaster check failed, the verification correctly failed. However, if a
5606 subsequent RCPT command asked for sender verification *without* the
5607 postmaster check, incorrect caching caused this verification also to fail,
5610 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5611 it was not caching the DNS options (qualify_single, search_parents) that
5612 were used when the lookup failed. A subsequent lookup with different
5613 options therefore always gave the same answer, though there were cases
5614 where it should not have. (Example: a "domains = !$mx_any" option on a
5615 dnslookup router: the "domains" option is always processed without any
5616 widening, but the router might have qualify_single set.) Now Exim uses the
5617 cached value only when the same options are set.
5619 32. Added John Jetmore's "exipick" utility to the distribution.
5621 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5622 than a timeout (e.g. a certificate is required, and is not provided), an
5623 Exim server now closes the connection immediately. Previously it waited for
5624 the client to close - but if the client is SSL, it seems that they each
5625 wait for each other, leading to a delay before one of them times out.
5627 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5628 maintained 0.8.x compatibility because I don't think many are using it, and
5629 it is clearly obsolete.
5631 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5634 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5635 client certificate was expired. A simple patch fixes this, though I don't
5636 understand the full logic of why the verify callback is called multiple
5639 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5640 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5641 which causes problems with some clients (such as the Certicom SSL Plus
5642 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5643 disables the coutermeasure allowing Eudora to connect."
5645 38. Exim was not checking that a write() to a log file succeeded. This could
5646 lead to Bad Things if a log got too big, in particular if it hit a file
5647 size limit. Exim now panics and dies if it cannot write to a log file, just
5648 as it does if it cannot open a log file.
5650 39. Modified OS/Makefile-Linux so that it now contains
5652 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5654 The two -D definitions ensure that Exim is compiled with large file
5655 support, which makes it possible to handle log files that are bigger than
5658 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5659 instance) a domain was checked against a named list that involved a lookup,
5660 causing $domain_data to be set, then another domain was checked against the
5661 same list, then the first domain was re-checked, the value of $domain_data
5662 after the final check could be wrong. In particular, if the second check
5663 failed, it could be set empty. This bug probably also applied to
5666 41. The strip_trailing_dot option was not being applied to the address given
5667 with the -f command-line option.
5669 42. The code for reading a message's header from the spool was incrementing
5670 $received_count, but never initializing it. This meant that the value was
5671 incorrect (doubled) while delivering a message in the same process in which
5672 it was received. In the most common configuration of Exim, this never
5673 happens - a fresh exec is done - but it can happen when
5674 deliver_drop_privilege is set.
5676 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5677 it now includes up to 150 characters of the unexpected data in the log
5680 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5681 and building data strings. The size of both of these buffers was 10 000
5682 bytes - far larger than anybody would *ever* want, thought I. Needless to
5683 say, somebody hit the limit. I have increased the maximum line length to
5684 20 000 and the maximum data length of concatenated lines to 100 000. I have
5685 also fixed two bugs, because there was no checking on these buffers. Tsk,
5686 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5687 buffer is too small.
5689 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5690 lsearch lookups. Now it does.
5692 46. When parsing a route_list item in a manualroute router, a fixed-length
5693 buffer was used for the list of hosts. I made this 1024 bytes long,
5694 thinking that nobody would ever have a list of hosts that long. Wrong.
5695 Somebody had a whole pile of complicated expansion conditions, and the
5696 string was silently truncated, leading to an expansion error. It turns out
5697 that it is easier to change to an unlimited length (owing to other changes
5698 that have happened since this code was originally written) than to build
5699 structure for giving a limitation error. The length of the item that
5700 expands into the list of hosts is now unlimited.
5702 47. The lsearch lookup could not handle data where the length of text line was
5703 more than 4095 characters. Such lines were truncated, leading to shortened
5704 data being returned. It should now handle lines of any length.
5706 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5707 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5710 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5711 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5712 no longer happens in comment lines. A list of replacements is now placed
5713 at the head of all of the source files, except those whose only change is
5714 to replace PERL_COMMAND in the very first #! line.
5716 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5717 messages on the queue, with a bottom-up merge sort, using code contributed
5718 by Michael Haardt. This should make operations like -bp somewhat faster on
5719 large queues. It won't affect queue runners, except when queue_run_in_order
5722 51. Installed eximstats 1.31 in the distribution.
5724 52. Added support for SRV lookups to the dnslookup router.
5726 53. If an ACL referred to $message_body or $message_body_end, the value was not
5727 reset for any messages that followed in the same SMTP session.
5729 54. The store-handling optimization for building very long strings was not
5730 differentiating between the different store pools. I don't think this
5731 actually made any difference in practice, but I've tidied it.
5733 55. While running the routers to verify a sender address, $sender_address
5734 was still set to the sender address. This is wrong, because when routing to
5735 send a bounce to the sender, it would be empty. Therefore, I have changed
5736 it so that, while verifying a sender address, $sender_address is set to <>.
5737 (There is no change to what happens when verifying a recipient address.)
5739 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5740 target A or AAAA records (if not already returned) without resetting the
5741 qualify_single or search_parents options of the DNS resolver. These are
5742 inappropriate in this case because the targets of MX and SRV records must
5743 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5744 target that, when qualified, matched something in the local domain. These
5745 two options are now turned off when doing these lookups.
5747 57. It seems that at least some releases of Reiserfs (which does not have the
5748 concept of a fixed number of inodes) returns zero and not -1 for the
5749 number of available inodes. This interacted badly with check_spool_inodes,
5750 which assumed that -1 was the "no such thing" setting. What I have done is
5751 to check that the total number of inodes is greater than zero before doing
5752 the test of how many are available.
5754 58. When a "warn" ACL statement has a log_message modifier, the message is
5755 remembered, and not repeated. This is to avoid a lot of repetition when a
5756 message has many recipients that cause the same warning to be written.
5757 However, Exim was preserving the list of already written lines for an
5758 entire SMTP session, which doesn't seem right. The memory is now reset if a
5759 new message is started.
5761 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5762 debugging output unless log_rewrite was also set.
5764 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5765 of (int)(handle) when we know that handle contains (void *)(-1).
5767 61. The Exim daemon panic-logs an error return when it closes the incoming
5768 connection. However "connection reset by peer" seems to be common, and
5769 isn't really an error worthy of noting specially, so that particular error
5772 62. When Exim is trying to find all the local interfaces, it used to panic and
5773 die if the ioctl to get the interface flags failed. However, it seems that
5774 on at least one OS (Solaris 9) it is possible to have an interface that is
5775 included in the list of interfaces, but for which you get a failure error
5776 for this call. This happens when the interface is not "plumbed" into a
5777 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5778 failure of the "get flags" call assumes that the interface is down.
5780 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5781 makes life easier for people who are doing arithmetic on fields extracted
5782 from dates, where you often get leading zeros that should not be
5783 interpreted as octal.
5785 64. Added qualify_domain to the redirect router, to override the global
5788 65. If a pathologically long header line contained very many addresses (the
5789 report of this problem mentioned 10 000) and each of them was rewritten,
5790 Exim could use up a very large amount of memory. (It kept on making new
5791 copies of the header line as it rewrote, and never released the old ones.)
5792 At the expense of a bit more processing, the header rewriting function has
5793 been changed so that it no longer eats memory in this way.
5795 66. The generation of the Received: header has been moved from the time that a
5796 message starts to be received, to the time that it finishes. The timestamp
5797 in the Received: header should now be very close to that of the <= log
5798 line. There are two side-effects of this change:
5800 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5801 logged header lines no longer include the local Received: line, because
5802 it has not yet been created. The same applies to a copy of the message
5803 that is returned to a non-SMTP sender when a message is rejected.
5805 (b) When a filter file is tested using -bf, no additional Received: header
5806 is added to the test message. After some thought, I decided that this
5809 This change does not affect the value of $received_for. It is still set
5810 after address rewriting, but before local_scan() is called.
5812 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5814 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5815 gave an unhelpful panic error message, and a defer error. I have managed to
5816 change this behaviour so that it now rejects any supplied certificate,
5817 which seems right, as the list of acceptable certificates is empty.
5819 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5820 gave an unhelpful defer error. I have not managed to make this reject any
5821 supplied certificates, but the error message it gives is "no certificate
5822 supplied", which is not helpful.
5824 70. exigrep's output now also includes lines that are not associated with any
5825 message, but which match the given pattern. Implemented by a patch from
5826 Martin Sluka, which also tidied up the Perl a bit.
5828 71. Recipient callout verification, like sender verification, was using <> in
5829 the MAIL FROM command. This isn't really the right thing, since the actual
5830 sender may affect whether the remote host accepts the recipient or not. I
5831 have changed it to use the actual sender in the callout; this means that
5832 the cache record is now keyed on a recipient/sender pair, not just the
5833 recipient address. There doesn't seem to be a real danger of callout loops,
5834 since a callout by the remote host to check the sender would use <>.
5835 [SEE ABOVE: changed after hitting problems.]
5837 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5838 temporary errors. However, in the case of such a code being given after
5839 the end of a data transmission (i.e. after ".") Exim was failing to write
5840 a retry record for the message. (Yes, there was some broken host that was
5841 actually sending 8xx at this point.)
5843 73. An unknown lookup type in a host list could cause Exim to panic-die when
5844 the list was checked. (An example that provoked this was putting <; in the
5845 middle of a list instead of at the start.) If this happened during a DATA
5846 ACL check, a -D file could be left lying around. This kind of configuration
5847 error no longer causes Exim to die; instead it causes a defer error. The
5848 incident is still logged to the main and panic logs.
5850 74. Buglet left over from Exim 3 conversion. The message "too many messages
5851 in one connection" was written to the rejectlog but not the mainlog, except
5852 when address rewriting (yes!) was being logged.
5854 75. Added write_rejectlog option.
5856 76. When a system filter was run not as root (that is, when system_filter_user
5857 was set), the values of the $n variables were not being returned to the
5858 main process; thus, they were not subsequently available in the $sn
5861 77. Added +return_path_on_delivery log selector.
5863 78. A connection timeout was being treated differently from recipients deferred
5864 when testing hosts_max_try with a message that was older than the host's
5865 retry timeout. (The host should not be counted, thus allowing all hosts to
5866 be tried at least once before bouncing.) This may have been the cause of an
5867 occasionally reported bug whereby a message would remain on the queue
5868 longer than the retry timeout, but would be bounced if a delivery was
5869 forced. I say "may" because I never totally pinned down the problem;
5870 setting up timeout/retry tests is difficult. See also the next item.
5872 79. The ultimate address timeout was not being applied to errors that involved
5873 a combination of host plus message (for example, a timeout on a MAIL
5874 command). When an address resolved to a number of possible hosts, and they
5875 were not all tried for each delivery (e.g. because of hosts_max_try), a
5876 message could remain on the queue longer than the retry timeout.
5878 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5881 81. Fixed an obscure SMTP outgoing bug which required at least the following
5882 conditions: (a) there was another message waiting for the same server;
5883 (b) the server returned 5xx to all RCPT commands in the first message so
5884 that the message was not completed; (c) the server dropped the connection
5885 or gave a negative response to the RSET that Exim sends to abort the
5886 transaction. The observed case was a dropped connection after DATA that had
5887 been sent in pipelining mode. That is, the server had advertised PIPELINING
5888 but was not implementing it correctly. The effect of the bug was incorrect
5889 behaviour, such as trying another host, and this could lead to a crash.
5895 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5896 and daemon.c were passed as pointers to ints; they should have been
5897 pointers to socklen_t variables (which are typically unsigned ints).
5899 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5902 3. Fixed a really odd bug that affected only the testing scheme; patching a
5903 certain fixed string in the binary changed the value of another string that
5904 happened to be identical to the end of the original first string.
5906 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5907 name", it returns that address as the IP address. On some operating
5908 systems (e.g. Solaris), it also passes back the IP address string as the
5909 "host name". However, on others (e.g. Linux), it passes back an empty
5910 string. Exim wasn't checking for this, and was changing the host name to an
5911 empty string, assuming it had been canonicalized.
5913 5. Although rare, it is permitted to have more than one PTR record for a given
5914 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5915 all the names associated with an address, because they do in Solaris.
5916 However, it seems that they do not in Linux for data that comes from the
5917 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5918 I found this out when I moved to a new Linux workstation and tried to run
5919 the Exim test suite.
5921 To get round this problem I have changed the code so that it now does its
5922 own call to the DNS to look up PTR records when searching for a host name.
5923 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5924 addresses that are only in /etc/hosts are still found.
5926 This behaviour is, however, controlled by an option called host_lookup_
5927 order, which defaults to "bydns:byaddr". If people want to use the other
5928 order, or indeed, just use one or the other means of lookup, they can
5929 specify it in this variable.
5931 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5932 some operating systems, this comes back from gethostbyaddr() as an empty
5933 string, and this is what Exim used to test for. However, it seems that in
5934 other systems, "." is yielded. Exim now tests for this case too.
5936 7. The values of check_spool_space and check_log_space are now held internally
5937 as a number of kilobytes instead of an absolute number of bytes. If a
5938 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5939 kilobyte. This means that much larger values can be stored.
5941 8. Exim monitor: an attempt to get the action menu when not actually pointing
5942 at a message produces an empty menu entitled "No message selected". This
5943 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5944 no entries in it ("Shell widget menu has zero width and/or height"). So I
5945 have added a single, blank menu entry in this case.
5947 9. Added ${quote_local_part.
5949 10. MIME decoding is now applied to the contents of Subject: header lines when
5952 11. Now that a reference to $sender_host_address automatically causes a reverse
5953 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5954 host lookup before query-style lookups in lists that might use this
5955 variable. This has therefore been abolished, and the "net-" prefix is no
5956 longer necessary for query-style lookups.
5958 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5959 have been a typo for LFLAGS, so it has been changed.
5961 13. The install script calls Exim with "-C /dev/null" in order to find the
5962 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5963 to be output. However, since Exim outputs its version number before the
5964 error, it didn't break the script. It just looked ugly. I fixed this by
5965 always allowing "-C /dev/null" if the caller is root.
5967 14. Ignore overlarge ACL variable number when reading spool file - insurance
5968 against a later release with more variables having written the file.
5970 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5971 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5972 this, as well as the form without the "IPv6" on the front.
5974 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5975 OS/Makefile-Darwin file.
5977 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5978 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5980 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5981 variable. However, some OS use ints for inodes. I've added cast to long int
5982 to get rid of the compiler warning.
5984 19. I had forgotten to lock out "/../" in configuration file names when
5985 ALT_CONFIG_PREFIX was set.
5987 20. Routers used for verification do not need to specify transports. However,
5988 if such a router generated a host list, and callout was configured, Exim
5989 crashed, because it could not find a port number from the (non-existent)
5990 transport. It now assumes port 25 in this circumstance.
5992 21. Added the -t option to exigrep.
5994 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5995 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5996 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5997 them is set, LOOKUP_LSEARCH is forced.
5999 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6001 24. Added sender and host information to the "rejected by local_scan()" log
6002 line; previously there was no indication of these.
6004 25. Added .include_if_exists.
6006 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6007 Linux. It turns out that not all file systems support this. Apparently some
6008 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6009 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6010 not supported on the file descriptor, is now ignored when Exim is trying to
6011 sync a directory. This applies only to Linux.
6013 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6015 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6016 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6019 29. Added support for maildirsize files from supplied patch (modified a bit).
6021 30. The use of :fail: followed by an empty string could lead Exim to respond to
6022 sender verification failures with (e.g.):
6024 550 Verification failed for <xxx>
6025 550 Sender verify failed
6027 where the first response line was missing the '-' that indicates it is not
6028 the final line of the response.
6030 31. The loop for finding the name of the user that called Exim had a hardwired
6031 limit of 10; it now uses the value of finduser_retries, which is used for
6032 all other user lookups.
6034 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6037 33. Exim was neglecting to zero errno before one call of strtol() when
6038 expanding a string and expecting an integer value. On some systems this
6039 resulted in spurious "integer overflow" errors. Also, it was casting the
6040 result into an int without checking.
6042 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6043 did not work. The code looks as if it has *never* worked, though it appears
6044 to have been documented since at least release 1.62. I have made it work.
6046 35. The "timeout_DNS" error in retry rules, also documented since at least
6047 1.62, also never worked. As it isn't clear exactly what this means, and
6048 clearly it isn't a major issue, I have abolished the feature by treating it
6049 as "timeout", and writing a warning to the main and panic logs.
6051 36. The display of retry rules for -brt wasn't always showing the error code
6054 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6055 timeout_connect_A, timeout_connect_MX.
6057 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6058 to the empty sender.
6060 39. The daemon was not analysing the content of -oX till after it had closed
6061 stderr and disconnected from the controlling terminal. This meant that any
6062 syntax errors were only noted on the panic log, and the return code from
6063 the command was 0. By re-arranging the code a little, I've made the
6064 decoding happen first, so such errors now appear on stderr, and the return
6065 code is 1. However, the actual setting up of the sockets still happens in
6066 the disconnected process, so errors there are still only recorded on the
6069 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6070 connections (as happens on some IP stacks) was logged at start up time as
6071 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6072 it from "IPv6 and IPv4", which means that two separate sockets are being
6075 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6076 says whether AF_INET or AF_INET6 was passed as an argument.
6078 42. Exiwhat output was messed up when time zones were included in log
6081 43. Exiwhat now gives more information about the daemon's listening ports,
6082 and whether -tls-on-connect was used.
6084 44. The "port" option of the smtp transport is now expanded.
6086 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6087 silently ignored. Now an error message is written to the main and panic
6090 46. There's a new ACL modifier called "logwrite" which writes to a log file
6091 as soon as it is encountered.
6093 47. Added $local_user_uid and $local_user_gid at routing time.
6095 48. Exim crashed when trying to verify a sender address that was being
6098 49. Exim was recognizing only a space character after ".include". It now also
6099 recognizes a tab character.
6101 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6102 extracting the relevant information from the specification. The man page no
6103 longer contains scrambled data for the -d option, and I've added a section
6104 at the front about calling Exim under different names.
6106 51. Added "extra_headers" argument to the "mail" command in filter files.
6108 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6111 53. Installed eximstats 1.29.
6113 54. Added transport_filter_timeout as a generic transport option.
6115 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6116 Cc: header lines. This was required by RFC 822, but it not required by RFC
6119 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6120 incoming messages that did not have them. Now it does so only if the
6121 message originates locally, that is, if there is no associated remote host
6122 address. When Resent- header lines are present, this applies to the Resent-
6123 lines rather than the non-Resent- lines.
6125 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6126 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6128 58. Messages for configuration errors now include the name of the main
6129 configuration file - useful now that there may be more than one file in a
6130 list (.included file names were always shown).
6132 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6133 for those rare installations that do not start the daemon as root or run it
6134 setuid root. I've cut out the call to initgroups() if the daemon is not
6137 60. The Exim user and group can now be bound into the binary as text strings
6138 that are looked up at the start of Exim's processing.
6140 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6142 62. Added $mailstore_basename variable.
6144 63. Installed patch to sieve.c from Michael Haardt.
6146 64. When Exim failed to open the panic log after failing to open the main log,
6147 the original message it was trying to log was written to stderr and debug
6148 output, but if they were not available (the usual case in production), it
6149 was lost. Now it is written to syslog before the two lines that record the
6150 failures to open the logs.
6152 65. Users' Exim filters run in subprocesses under the user's uid. It is
6153 possible for a "deliver" command or an alias in a "personal" command to
6154 provoke an address rewrite. If logging of address rewriting is configured,
6155 this fails because the process is not running as root or exim. There may be
6156 a better way of dealing with this, but for the moment (because 4.30 needs
6157 to be released), I have disabled address rewrite logging when running a
6158 filter in a non-root, non-exim process.
6164 1. The buildconfig auxiliary program wasn't quoting the value set for
6165 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6166 not defined. This bug was masked in 4.22 by the effect that was fixed in
6169 2. Some messages that were rejected after a message id was allocated were
6170 shown as "incomplete" by exigrep. It no longer does this for messages that
6171 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6173 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6174 have allow_domain_literals set, the ID did not get logged in the <= line.
6175 Domain literals are now always recognized in Message-ID: header lines.
6177 4. The first argument for a ${extract expansion item is the key name or field
6178 number. Leading and trailing spaces in this item were not being ignored,
6179 causing some misleading effects.
6181 5. When deliver_drop_privilege was set, single queue runner processes started
6182 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6183 same command in the process it spins off) were not dropping privilege.
6185 6. When the daemon running as "exim" started a queue runner, it always
6186 re-executed Exim in the spun-off process. This is a waste of effort when
6187 deliver_drop_privilege is set. The new process now just calls the
6188 queue-runner function directly.
6194 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6197 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6198 ignored. Though the use of -oP was forcing the writing of a pid file, it
6199 was always written to the default place.
6201 3. If the message "no IP address found for host xxxx" is generated during
6202 incoming verification, it is now followed by identification of the incoming
6203 connection (so you can more easily find what provoked it).
6205 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6207 5. Added some features to "harden" Exim a bit more against certain attacks:
6209 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6210 be put in Local/Makefile. This is like the never_users runtime option,
6211 but it cannot be overridden. The default setting is "root".
6213 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6214 prefix string with which any file named in a -C command line option
6217 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6218 is retained for -C and -D only if the caller of Exim is root. Without
6219 it, the exim user may also use -C and -D and retain privilege.
6221 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6222 command line option is disabled.
6224 6. Macro names set by the -D option must start with an upper case letter, just
6225 like macro names defined in the configuration file.
6227 7. Added "dereference=" facility to LDAP.
6229 8. Two instances of the typo "uknown" in the source files are fixed.
6231 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6232 the Configure-Makefile script screwed up while processing it.
6234 10. Incorporated PCRE 4.4.
6236 11. The SMTP synchronization check was not operating right at the start of an
6237 SMTP session. For example, it could not catch a HELO sent before the client
6238 waited for the greeting. There is now a check for outstanding input at the
6239 point when the greeting is written. Because of the duplex, asynchronous
6240 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6241 way, but not yet received, when the check is performed.
6243 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6244 on TCP/IP sockets, because this apparently causes some broken clients to
6247 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6248 unchanged) from the Cygwin maintainer.
6250 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6251 was supported instead of testing for mbx. Effectively a typo.
6253 15. The spa authenticator server code was not checking that the input it
6254 received was valid base64.
6256 16. The debug output line for the "set" modifier in ACLs was not showing the
6257 name of the variable that was being set.
6259 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6261 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6262 lookup on its own. Something else was needed to trigger the lookup. For
6263 example, a match in host_lookup or the need for a host name in a host list.
6264 Now, if $sender_host_name is referenced and the host name has not yet been
6265 looked up, a lookup is performed. If the lookup fails, the variable remains
6266 empty, and $host_lookup_failed is set to "1".
6268 19. Added "eqi" as a case-independent comparison operator.
6270 20. The saslauthd authentication condition could segfault if neither service
6271 nor realm was specified.
6273 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6274 error message that was logged was misleading, and incoming SMTP
6275 connections were dropped. The message is now more accurate, and temporary
6276 errors are given to SMTP connections.
6278 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6279 (except RSET) with a 421 error, until QUIT is received. However, it was
6280 failing to send a response to QUIT.
6282 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6283 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6284 ACL is now run after the helo_try_verify_hosts code.
6286 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6287 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6288 case-independent, so other case variants are also recognized). Apparently
6289 some systems use these upper case variants.
6291 25. If more than two messages were waiting for the same host, and a transport
6292 filter was specified for the transport, Exim sent two messages over the
6293 same TCP/IP connection, and then failed with "socket operation on non-
6294 socket" when it tried to send the third.
6296 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6298 27. The extern definition of crypt16() in expand.c was not being excluded when
6299 the OS had its own crypt16() function.
6301 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6302 as a preferred synonym for return_size_limit, both as an option and as an
6305 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6307 30. Changed the default configuration ACL to relax the local part checking rule
6308 for addresses that are not in any local domains. For these addresses,
6309 slashes and pipe symbols are allowed within local parts, but the sequence
6310 /../ is explicitly forbidden.
6312 31. SPA server authentication was not clearing the challenge buffer before
6315 32. log_message in a "warn" ACL statement was writing to the reject log as
6316 well as to the main log, which contradicts the documentation and doesn't
6317 seem right (because no rejection is happening). So I have stopped it.
6319 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6320 However, I am unable to do any testing of this.
6322 34. Fixed an infelicity in the appendfile transport. When checking directories
6323 for a mailbox, to see if any needed to be created, it was accidentally
6324 using path names with one or more superfluous leading slashes; tracing
6325 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6327 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6328 contents are added to the log line that is written for every discarded
6329 recipient. (Previously a log_message setting was ignored.)
6331 36. The ${quote: operator now quotes the string if it is empty.
6333 37. The install script runs exim in order to find its version number. If for
6334 some reason other than non-existence or emptiness, which it checks, it
6335 could not run './exim', it was installing it with an empty version number,
6336 i.e. as "exim-". This error state is now caught, and the installation is
6339 38. An argument was missing from the function that creates an error message
6340 when Exim fails to connect to the socket for saslauthd authentication.
6341 This could cause Exim to crash, or give a corrupted message.
6343 39. Added isip, isip4, and isip6 to ${if conditions.
6345 40. The ACL variables $acl_xx are now saved with the message, and can be
6346 accessed later in routers, transports, and filters.
6348 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6349 strings in the file are not string-expanded.
6351 42. If a MAIL command specified a SIZE value that was too large to fit into an
6352 int variable, the check against message_size_limit failed. Such values are
6353 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6354 day this will have to be increased, but I don't think I want to be around
6355 when emails are that large.
6362 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6363 iconv() is not standard in FreeBSD.
6365 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6366 IPv6 enabled. The observed symptom was a segmentation fault on return from
6367 the function os_common_find_running_interfaces() in src/os.c.
6369 3. In the check_special_case() function in daemon.c I had used "errno" as an
6370 argument name, which causes warnings on some systems. This was basically a
6371 typo, since it was named "eno" in the comments!
6373 4. The code that waits for the clock to tick (at a resolution of some fraction
6374 of a second) so as to ensure message-id uniqueness was always waiting for
6375 at least one whole tick, when it could have waited for less. [This is
6376 almost certainly not relevant at current processor speeds, where it is
6377 unlikely to ever wait at all. But we try to future-proof.]
6379 5. The function that sleeps for a time interval that includes fractions of a
6380 second contained a race. It did not block SIGALRM between setting the
6381 timer, and suspending (a couple of lines later). If the interval was short
6382 and the sigsuspend() was delayed until after it had expired, the suspension
6383 never ended. On busy systems this could lead to processes getting stuck for
6386 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6387 process, before it forks any delivery processes. The open lookup caching
6388 mechanism meant that the open file or database connection was passed into
6389 the delivery process. The problem was that delivery processes always tidy
6390 up cached lookup data. This could cause a problem for the next delivery
6391 process started by the queue runner, because the external queue runner
6392 process does not know about the closure. So the next delivery process
6393 still has data in the lookup cache. In the case of a file lookup, there was
6394 no problem because closing a file descriptor in a subprocess doesn't affect
6395 the parent. However, if the lookup was caching a connection to a database,
6396 the connection was closed, and the second delivery process was likely to
6397 see errors such as "PGSQL: query failed: server closed the connection
6398 unexpectedly". The problem has been fixed by closing all cached lookups
6399 in a queue runner before running a delivery process.
6401 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6402 seem to have the "const" qualifier which it has on other OS. I've
6405 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6406 *of the same type* (client or server) with the same public name that an
6407 error should be diagnosed.
6409 9. When Exim looked up a host name for an IP address, but failed to find the
6410 original IP address when looking up the host name (a safety check), it
6411 output the message "<ip address> does not match any IP for NULL", which was
6412 confusing, to say the least. The bug was that the host name should have
6413 appeared instead of "NULL".
6415 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6416 user that is built into the binary, and the -C or -D options is used, root
6417 privilege is dropped before the configuration file is read. In addition,
6418 logging is switched to stderr instead of the normal log files. If the
6419 configuration then re-defines the Exim user, the unprivileged environment
6420 is probably not what is expected, so Exim logs a panic warning message (but
6423 However, if deliver_drop_privilege is set, the unprivileged state may well
6424 be exactly what is intended, so the warning has been cut out in that case,
6425 and Exim is allowed to try to write to its normal log files.
6431 1. smtp_return_error_details was not giving details for temporary sender
6432 or receiver verification errors.
6434 2. Diagnose a configuration error if two authenticators have the same public
6437 3. Exim used not to create the message log file for a message until the first
6438 delivery attempt. This could be confusing when incoming messages were held
6439 for policy or load reasons. The message log file is now created at the time
6440 the message is received, and an initial "Received" line is written to it.
6442 4. The automatically generated man page for command line options had a minor
6443 bug that caused no ill effects; however, a more serious problem was that
6444 the procedure for building the man page automatically didn't always
6445 operate. Consequently, release 4.20 contains an out-of-date version. This
6446 shouldn't happen again.
6448 5. When building Exim with embedded Perl support, the script that builds the
6449 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6450 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6452 6. The freeze_tell option was not being used for messages that were frozen on
6453 arrival, either by an ACL or by local_scan().
6455 7. Added the smtp_incomplete_transaction log selector.
6457 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6458 was accepting AUTH without a new EHLO.
6460 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6461 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6464 10. Logging of TCP/IP connections (when configured) now happens in the main
6465 daemon process instead of the child process, so that the TCP/IP connection
6466 count is more accurate (but it can never be perfect).
6468 11. The use of "drop" in a nested ACL was not being handled correctly in the
6469 outer ACL. Now, if condition failure induced by the nested "drop" causes
6470 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6471 or "require"), the connection is dropped.
6473 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6474 that yield "discard" can now be used with an "accept" or a "discard" verb,
6475 but an error is generated for any others (because I can't see a useful way
6476 to define what should happen).
6478 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6479 are now processed in the same way as lines in the Exim configuration file.
6480 In particular, continuation lines are supported.
6482 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6484 15. Added -ti meaning -t -i.
6486 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6487 domains, and warn by logging if others are found.
6489 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6490 returned from GIFCONF when Exim is trying to find the list of interfaces on
6491 a host. The code in os.c has been modified to copy each ifreq to an aligned
6492 structure in all cases.
6494 Also, in some cases, the returned ifreq's were being copied to a 'struct
6495 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6496 means the last couple of bytes of an IPv6 address could be chopped if the
6497 ifreq contained only a normal sockaddr (14 bytes storage).
6499 18. Named domain lists were not supported in the hosts_treat_as_local option.
6500 An entry such as +xxxx was not recognized, and was treated as a literal
6503 19. Ensure that header lines added by a DATA ACL are included in the reject log
6504 if the ACL subsequently rejects the message.
6506 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6507 MD5 (which is deprecated).
6509 21. When testing a filter file using -bf, Exim was writing a message when it
6510 took the sender from a "From " line in the message, but it was not doing so
6511 when it took $return_path from a Return-Path: header line. It now does.
6513 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6514 with a valid header line field name (a series of printing characters
6515 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6517 23. Changed "disc" in the source to "disk" to conform to the documentation and
6518 the book and for uniformity.
6520 24. Ignore Sendmail's -Ooption=value command line item.
6522 25. When execve() failed while trying to run a command in a pipe transport,
6523 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6524 could be confused with a return value of 69 from the command itself. This
6525 has been changed to 127, the value the shell returns if it is asked to run
6526 a non-existent command. The wording for the related log line suggests a
6527 non-existent command as the problem.
6529 26. If received_header_text expands to an empty string, do not add a Received:
6530 header line to the message. (Well, it adds a token one on the spool, but
6531 marks it "old" so that it doesn't get used or transmitted.)
6533 27. Installed eximstats 1.28 (addition of -nt option).
6535 28. There was no check for failure on the call to getsockname() in the daemon
6536 code. This can fail if there is a shortage of resources on the system, with
6537 ENOMEM, for example. A temporary error is now given on failure.
6539 29. Contrary to the C standard, it seems that in some environments, the
6540 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6541 program. Exim now does this explicitly; it affects the formatting of
6542 timestamps using strftime().
6544 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6545 complaints. I've now initialized all the variables, to avoid this.
6547 32. Header lines added by a system filter were not being "seen" during
6548 transport-time rewrites.
6550 33. The info_callback() function passed to OpenSSL is set up with type void
6551 (*)(SSL *, int, int), as described somewhere. However, when calling the
6552 function (actually a macro) that sets it up, the type void(*)() is
6553 expected. I've put in a cast to prevent warnings from picky compilers.
6555 34. If a DNS black list lookup found a CNAME record, but there were no A
6556 records associated with the domain it pointed at, Exim crashed.
6558 35. If a DNS black list lookup returned more than one A record, Exim ignored
6559 all but the first. It now scans all returned addresses if a particular IP
6560 value is being sought. In this situation, the contents of the
6561 $dnslist_value variable are a list of all the addresses, separated by a
6564 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6565 to accept a host name and all its aliases if the forward lookup for any of
6566 them yielded the IP address of the incoming connection. Now it accepts only
6567 those names whose forward lookup yields the correct IP address. Any other
6568 names are discarded. This closes a loophole whereby a rogue DNS
6569 administrator could create reverse DNS records to break through a
6570 wildcarded host restriction in an ACL.
6572 37. If a user filter or a system filter that ran in a subprocess used any of
6573 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6574 the wrong values were passed to the pipe command ($thisaddress had the
6575 value of $0, $0 had the value of $1, etc). This bug was introduced by
6576 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6578 38. Improved the line breaking for long SMTP error messages from ACLs.
6579 Previously, if there was no break point between 40 and 75 characters, Exim
6580 left the rest of the message alone. Two changes have been made: (a) I've
6581 reduced the minimum length to 35 characters; (b) if it can't find a break
6582 point between 35 and 75 characters, it looks ahead and uses the first one
6583 that it finds. This may give the occasional overlong line, but at least the
6584 remaining text gets split now.
6586 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6587 file descriptors might be low, and that setting 1000 would always raise it.
6588 It turns out that in some environments, the limit is already over 1000 and
6589 that lowering it causes trouble. So now Exim takes care not to decrease it.
6591 40. When delivering a message, the value of $return_path is set to $sender_
6592 address at the start of routing (routers may change the value). By an
6593 oversight, this default was not being set up when an address was tested by
6594 -bt or -bv, which affected the outcome if any router or filter referred to
6597 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6598 log only when "message" or "log_message" are set. However, if one of the
6599 conditions was an address verification, or a call to a nested ACL, the
6600 messages generated by the underlying test were being passed through. This
6601 no longer happens. The underlying message is available in $acl_verify_
6602 message for both "message" and "log_message" expansions, so it can be
6603 passed through if needed.
6605 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6606 new expansion $bh_ to give the encoded byte string without charset
6607 translation. Translation happens only if iconv() is available; HAVE_ICONV
6608 indicates this at build time. HEADERS_CHARSET gives the charset to
6609 translate to; headers_charset can change it in the configuration, and
6610 "headers charset" can change it in an individual filter file.
6612 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6613 that creates RFC 2047 encoded "words" labels them as that charset instead
6614 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6615 expansion operator; (ii) when Exim creates a From: line for a local
6616 message; (iii) when a header line is rewritten to include a "phrase" part.
6618 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6619 buggy, causing it to skip the first lines of messages whose message ID
6620 ended in 'D'. This would not have bitten before Exim release 4.14, because
6621 message IDs were unlikely to end in 'D' before then. The effect was to have
6622 incorrect size information for certain domains.
6624 45. #include "config.h" was missing at the start of the crypt16.c module. This
6625 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6628 46. If there was a timeout during a "random" callout check, Exim treated it as
6629 a failure of the random address, and carried on sending RSET and the real
6630 address. If the delay was just some slowness somewhere, the response to the
6631 original RCPT would be taken as a response to RSET and so on, causing
6632 mayhem of various kinds.
6634 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6635 when I implemented it. It didn't allow for the fact that some option values
6636 may legitimately be negative (e.g. size_addition), and it didn't even do
6637 the right test for positive values.
6639 48. Domain names in DNS records are case-independent. Exim always looks them up
6640 in lower case. Some resolvers return domain names in exactly the case they
6641 appear in the zone file, that is, they may contain uppercase letters. Not
6642 all resolvers do this - some return always lower case. Exim was treating a
6643 change of case by a resolver as a change of domain, similar to a widening
6644 of a domain abbreviation. This triggered its re-routing code and so it was
6645 trying to route what was effectively the same domain again. This normally
6646 caused routing to fail (because the router wouldn't handle the domain
6647 twice). Now Exim checks for this case specially, and just changes the
6648 casing of the domain that it ultimately uses when it transmits the message
6651 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6654 50. If a filter generated a file delivery with a non-absolute name (possible if
6655 no home directory exists for the router), the forbid_file option was not
6658 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6659 the existing equality matching.
6661 52. Exim was using ints instead of ino_t variables in some places where it was
6662 dealing with inode numbers.
6664 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6665 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6666 called TMPDIR, and if it finds it is different, it changes its value.
6668 54. The smtp_printf() function is now made available to local_scan() so
6669 additional output lines can be written before returning. There is also an
6670 smtp_fflush() function to enable the detection of a dropped connection.
6671 The variables smtp_input and smtp_batched_input are exported to
6674 55. Changed the default runtime configuration: the message "Unknown user"
6675 has been removed from the ACL, and instead placed on the localuser router,
6676 using the cannot_route_message feature. This means that any verification
6677 failures that generate their own messages won't get overridden. Similarly,
6678 the "Unrouteable address" message that was in the ACL for unverifiable
6679 relay addresses has also been removed.
6681 56. Added hosts_avoid_esmtp to the smtp transport.
6683 57. The exicyclog script was not checking for the esoteric option
6684 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6685 will work only if exicyclog is run under the appropriate euid.
6687 58. Following a discussion on the list, the rules by which Exim recognises line
6688 endings on incoming messages have been changed. The -dropcr and drop_cr
6689 options are now no-ops, retained only for backwards compatibility. The
6690 following line terminators are recognized: LF CRLF CR. However, special
6691 processing applies to CR:
6693 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6694 nor a local message in the state where . is a terminator.
6696 (ii) If a bare CR is encountered in a header line, an extra space is added
6697 after the line terminator so as not to end the header. The reasoning
6698 behind this is that bare CRs in header lines are most likely either
6699 to be mistakes, or people trying to play silly games.
6701 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6702 was being incorrectly given as 18 bytes larger than it should have been.
6703 This is a VOB (very old bug).
6705 60. This may never have affected anything current, but just in case it has:
6706 When the local host is found other than at the start of a list of hosts,
6707 the local host, those with the same MX, and any that follow, are discarded.
6708 When the list in question was part of a longer list of hosts, the following
6709 hosts (not currently being processed) were also being discarded. This no
6710 longer happens. I'm not sure if this situation could ever has previously
6713 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6716 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6717 header. This is something that is recommended in a new Internet Draft, and
6718 is something that is documented as being done by Sendmail. There are two
6719 possible values. For messages generated by the autoreply transport, Exim
6722 Auto-Submitted: auto-replied
6724 whereas for all other generated messages (e.g. bounces) it adds
6726 Auto-Submitted: auto-generated
6728 63. The "personal" condition in filters now includes a test for the
6729 Auto-Submitted: header. If it contains the string "auto-" the message it
6730 not considered personal.
6732 64. Added rcpt_include_affixes as a generic transport option.
6734 65. Added queue_only_override (default true).
6736 66. Added the syslog_duplication option.
6738 67. If what should have been the first header line of a message consisted of
6739 a space followed by a colon, Exim was mis-interpreting it as a header line.
6740 It isn't of course - it is syntactically invalid and should therefore be
6741 treated as the start of the message body. The misbehaviour could have
6742 caused a number of strange effects, including loss of data in subsequent
6743 header lines, and spool format errors.
6745 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6746 client host had authenticated. This control can now be exercised by an ACL
6747 for more flexibility.
6749 69. By default, callouts do not happen when testing with -bh. There is now a
6750 variant, -bhc, which does actually run the callout code, including
6751 consulting and updating the callout cache.
6753 70. Added support for saslauthd authentication, courtesy of Alexander
6756 71. If statvfs() failed on the spool or log directories while checking their
6757 size for availability, Exim confusingly gave the error "space shortage".
6758 Furthermore, in debugging mode it crashed with a floating point exception.
6759 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6760 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6761 serious problem, Exim now writes to the main and panic logs when this
6762 happens, with details of the failure. It then refuses to accept the
6763 incoming message, giving the message "spool directory problem" or "log
6764 directory problem" with a 421 code for SMTP messages.
6766 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6767 0, 1, and 2 exist, because some OS complain for execs without them (see
6768 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6769 descriptors. However, the code omitted to check that the open succeeded,
6770 causing mysterious errors if for some reason the permissions on /dev/null
6771 got screwed. Now Exim writes a message to the main and panic logs, and
6772 bombs out if it can't open /dev/null.
6774 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6775 interact so that it is all more flexible. It is supposed to remain
6776 backwards compatible. Also added extra_local_interfaces.
6778 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6779 to bomb out with an assertion failure - to the client this appears as a
6780 connection drop. This problem occurs in the part of the code that was taken
6781 from the Samba project. Fortunately, the assertion is in a very simple
6782 function, so I have fixed this by reproducing the function inline in the
6783 one place where it is called, and arranging for authentication to fail
6784 instead of killing the process with assert().
6786 75. The SPA client code was not working when the server requested OEM rather
6787 than Unicode encoding.
6789 76. Added code to make require_files with a specific uid setting more usable in
6790 the case where statting the file as root fails - usually a non-root-mounted
6791 NFS file system. When this happens and the failure is EACCES, Exim now
6792 forks a subprocess and does the per-uid checking as the relevant uid.
6794 77. Added process_log_path.
6796 78. If log_file_path was not explicitly set, a setting of check_log_space or
6797 check_log_inodes was ignored.
6799 79. If a space check for the spool or log partitions fails, the incident is now
6800 logged. Of course, in the latter case the data may get lost...
6802 80. Added the %p formatting code to string_format() so that it can be used to
6803 print addresses in debug_print(). Adjusted all the address printing in the
6804 debugging in store.c to use %p rather than %d.
6806 81. There was a concern that a line of code in smtp_in.c could overflow a
6807 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6808 initially expressed, the concern was not well-founded, because trailing
6809 spaces are removed early. However, if the trailing spaces were followed by
6810 a NULL, they did not get removed, so the overflow was possible. Two fixes
6813 (a) I re-wrote the offending code in a cleaner fashion.
6814 (b) If an incoming SMTP command contains a NULL character, it is rejected
6817 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6818 runs initgroups(), so that if the Exim user is in any additional groups,
6819 they will be used during message reception.
6825 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob