1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
8 Exim version 4.89+fixes
9 -----------------------
10 Cherry-Picked from the master development branch
11 -------------------------------------------------
13 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
15 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
16 Disable the session-cache too, which might reduce our load. Since we
17 currrectly use a new context for every connection, both as server and
18 client, there is no benefit for these.
19 GnuTLS appears to not support tickets server-side by default (we don't
20 call gnutls_session_ticket_enable_server()) but client side is enabled
21 by default on recent versions (3.1.3 +) unless the PFS priority string
24 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
25 the check for any unsuccessful recipients did not notice the limit, and
26 erroneously found still-pending ones.
28 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
29 compatible one, to avoid the (poorly documented) possibility of a config
30 file in the working directory redirecting the DB files, possibly correpting
31 some existing file. CVE-2017-10140 assigned for BDB.
33 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
34 cache-hot. Previously, although the result was properly cached, the
35 initial verify call returned a defer.
37 JH/21 Bug 2151 (partial):
38 Avoid using SIZE on the MAIL for a callout verify, on any but
39 the main verify for receipient in uncached-mode.
41 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
42 the right size to place the terminating semicolon on its own folded
43 line, the header hash was calculated to an incorrect value thanks to
44 the (relaxed) space the fold became.
46 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
47 which could crash as a result. This could lead to undeliverable messages.
49 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
50 are unsuable for non-message-specific reasons - eg. connection timeout,
51 banner-time rejection.
57 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
58 than -2003 did; needs libidn2 in addition to libidn.
60 JH/02 The path option on a pipe transport is now expanded before use.
62 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
63 Patch provided by "Björn", documentation fix added too.
65 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
66 missing a wire-to-host endian conversion.
68 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
69 close after a BDAT command line could be taken as a following command,
70 giving a synch failure. Fix by only checking for synch immediately
71 before acknowledging the chunk.
73 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
74 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
75 macro. Patches provided by Josh Soref.
77 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
78 Previously we did not; the RFC seems ambiguous and VRFY is not listed
79 by IANA as a service extension. However, John Klensin suggests that we
82 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
83 the dkim code may be unix-mode line endings rather than smtp wire-format
84 CRLF, so prepend a CR to any bare LF.
86 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
87 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
89 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
90 the first were themselves being wrongly included in the feed into dkim
91 processing; with most chunk sizes in use this resulted in an incorrect
92 body hash calculated value.
94 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
95 DKIM signature block, for verification. Although advised against by
96 standards it is specifically not ruled illegal.
98 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
100 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
101 missing a body hash (the bh= tag).
103 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
104 It seems that HAProxy sends the Proxy Protocol information in clear and
105 only then does a TLS startup, so do the same.
107 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
108 TCP connections (such as for Spamd) unless the daemon successfully set
109 Fast Open mode on its listening sockets. This fixes breakage seen on
110 too-old kernels or those not configured for Fast Open, at the cost of
111 requiring both directions being enabled for TFO, and TFO never being used
112 by non-daemon-related Exim processes.
114 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
115 endings, at least on the first header line. Try to canonify any that get
116 past that check, despite the cost.
118 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
119 now limited to an arbitrary five deep, while parsing addresses with the
120 strip_excess_angle_brackets option enabled.
122 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
123 instead leave the unprompted TLS handshake in socket buffer for the
124 TLS library to consume.
126 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
128 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
130 JH/16 Drop variables when they go out of scope. Memory management drops a whole
131 region in one operation, for speed, and this leaves assigned pointers
132 dangling. Add checks run only under the testsuite which checks all
133 variables at a store-reset and panics on a dangling pointer; add code
134 explicitly nulling out all the variables discovered. Fixes one known
135 bug: a transport crash, where a dangling pointer for $sending_ip_address
136 originally assigned in a verify callout, is re-used.
138 PP/06 Drop '.' from @INC in various Perl scripts.
140 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
142 PP/08 Reduce a number of compilation warnings under clang; building with
143 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
144 should be warning-free.
146 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
148 HS/01 Fix portability problems introduced by PP/08 for platforms where
149 realloc(NULL) is not equivalent to malloc() [SunOS et al].
151 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
152 chunk. This allows us to accept broken chunked messages. We need a more
153 general solution here.
155 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
156 already-broken messages in the queue.
158 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
160 JH/19 Fix reference counting bug in routing-generated-address tracking.
166 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
167 supports it and a size is available (ie. the sending peer gave us one).
169 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
170 years of being deprecated). The replacements are the ACLs
171 acl_smtp_mime and acl_not_smtp_mime.
173 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
174 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
175 or even an in-clear connection were permitted. Now, if the host lookup
176 was dnssec and dane was requested then the host is only used if the
177 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
178 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
179 if one fails this test.
180 This means that a poorly-configured remote DNS will make it incommunicado;
181 but it protects against a DNS-interception attack on it.
183 JH/04 Bug 1810: make continued-use of an open smtp transport connection
184 non-noisy when a race steals the message being considered.
186 JH/05 If main configuration option tls_certificate is unset, generate a
187 self-signed certificate for inbound TLS connections.
189 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
190 in rewrites and routers.
192 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
193 and logged a warning sing 4.83; now they are a configuration file error.
195 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
196 (lacking @domain). Apply the same qualification processing as RCPT.
198 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
200 JH/10 Support ${sha256:} applied to a string (as well as the previous
203 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
204 a cutthrough deliver is pending, as we always want to make a connection.
205 This also avoids re-routing the message when later placing the cutthrough
206 connection after a verify cache hit.
207 Do not update it with the verify result either.
209 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
210 when routing results in more than one destination address.
212 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
213 signing (which inhibits the cutthrough capability). Previously only
214 the presence of an option was tested; now an expansion evaluating as
215 empty is permissible (obviously it should depend only on data available
216 when the cutthrough connection is made).
218 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
219 the relevant preceding SMTP command did not note the pipelining mode.
221 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
222 Previously they were not counted.
224 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
225 as one having no matching records. Previously we deferred the message
226 that needed the lookup.
228 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
229 distinguished as "(=".
231 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
232 for missing MX records. Previously it only worked for missing A records.
234 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
236 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
237 after the data-go-ahead and data-ack. Patch from Jason Betts.
239 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
240 even for a "none" policy. Patch from Tony Meyer.
242 JH/22 Fix continued use of a connection for further deliveries. If a port was
243 specified by a router, it must also match for the delivery to be
246 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
247 When one of the recipients of a message was unsuitable for the connection
248 (has no matching addresses), we lost track of needing to mark it
249 deferred. As a result mail would be lost.
251 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
253 JH/25 Decoding ACL controls is now done using a binary search; the source code
254 takes up less space and should be simpler to maintain. Merge the ACL
255 condition decode tables also, with similar effect.
257 JH/26 Fix problem with one_time used on a redirect router which returned the
258 parent address unchanged. A retry would see the parent address marked as
259 delivered, so not attempt the (identical) child. As a result mail would
262 JH/27 Fix a possible security hole, wherein a process operating with the Exim
263 UID can gain a root shell. Credit to http://www.halfdog.net/ for
264 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
267 JH/28 Enable {spool,log} filesystem space and inode checks as default.
268 Main config options check_{log,spool}_{inodes,space} are now
269 100 inodes, 10MB unless set otherwise in the configuration.
271 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
272 Previously it only applied to the main-section connection policy
275 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
277 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
278 by me. Added RFC7919 DH primes as an alternative.
280 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
281 are not in the system include path.
283 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
284 GnuTLS, when a session startup failed (eg because the client disconnected)
285 Exim did stdio operations after fclose. This was exposed by a recent
286 change which nulled out the file handle after the fclose.
288 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
289 signed directly by the cert-signing cert, rather than an intermediate
290 OCSP-signing cert. This is the model used by LetsEncrypt.
292 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
294 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
295 an incoming connection.
297 HS/02 Bug 1802: Do not half-close the connection after sending a request
300 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
301 fallback to "prime256v1".
303 JH/34 SECURITY: Use proper copy of DATA command in error message.
304 Could leak key material. Remotely exploitable. CVE-2016-9963.
310 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
311 and 3.4.4 - once the server is enabled to respond to an OCSP request
312 it does even when not requested, resulting in a stapling non-aware
313 client dropping the TLS connection.
315 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
316 support variable-length bit vectors. No functional change.
318 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
319 The I= interface field on outgoing lines is now after the H= remote
320 host field, same as incoming lines. There is a separate
321 outgoing_interface log selector which allows you to disable the
324 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
325 If not running log_selector +smtp_connection the mainlog would be held
326 open indefinitely after a "too many connections" event, including to a
327 deleted file after a log rotate. Leave the per net connection logging
328 leaving it open for efficiency as that will be quickly detected by the
329 check on the next write.
331 HS/01 Bug 1671: Fix post transport crash.
332 Processing the wait-<transport> messages could crash the delivery
333 process if the message IDs didn't exist for some reason. When
334 using 'split_spool_directory=yes' the construction of the spool
335 file name failed already, exposing the same netto behaviour.
337 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
338 mime_regex ACL conditions.
340 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
341 to DSN fail messages (bounces): remote IP, remote greeting, remote response
342 to HELO, local diagnostic string.
344 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
345 log line to debug. Even when configured with a tls authenticator many
346 client connections are expected to not authenticate in this way, so
347 an authenticate fail is not an error.
349 HS/02 Add the Exim version string to the process info. This way exiwhat
350 gives some more detail about the running daemon.
352 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
353 matter for fast-change records such as DNSBLs.
355 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
356 retry record, even if constant. There may be multiple transports with
357 different interface settings and the retry behaviour needs to be kept
360 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
362 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
364 JH/10 Bug 840: fix log_defer_output option of pipe transport
366 JH/11 Bug 830: use same host for all RCPTS of a message, even under
367 hosts_randomize. This matters a lot when combined with mua_wrapper.
369 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
370 ${quote_pgsql:<string>} operator.
372 JH/13 Bug 1708: avoid misaligned access in cached lookup.
374 JH/14 Change header file name for freeradius-client. Relevant if compiling
375 with Radius support; from the Gentoo tree and checked under Fedora.
377 JH/15 Bug 1712: Introduce $prdr_requested flag variable
379 JH/16 Bug 1714: Permit an empty string as expansion result for transport
380 option transport_filter, meaning no filtering.
382 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
384 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
385 defaults to "*" (all hosts). The variable is now available when not built
386 with TLS, default unset, mainly to enable keeping the testsuite sane.
387 If a server certificate is not supplied (via tls_certificate) an error is
388 logged, and clients will find TLS connections fail on startup. Presumably
389 they will retry in-clear.
390 Packagers of Exim are strongly encouraged to create a server certificate
391 at installation time.
393 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
394 with the $config_file variable.
396 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
397 in transport context, after the attempt, and per-recipient. The latter type
398 is per host attempted. The event data is the error message, and the errno
399 information encodes the lookup type (A vs. MX) used for the (first) host,
400 and the trailing two digits of the smtp 4xx response.
402 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
403 to write to mainlog (or rejectlog, paniclog) in the window between file
404 creation and permissions/ownership being changed. Particularly affects
405 installations where exicyclog is run as root, rather than exim user;
406 result is that the running daemon panics and dies.
408 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
410 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
411 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
412 "pri" and "weight". Note that the previous implicit priority given by the
413 list order is no longer honoured.
415 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
418 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
419 by defining SUPPORT_SOCKS.
421 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
422 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
423 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
424 variables are renamed to proxy_{local,external}_{address,port}.
426 JH/27 Move Internationalisation support from Experimental to mainline, enabled
427 for a build by defining SUPPORT_I18N
429 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
430 of the query string, and make ${quote_redis:} do that quoting.
432 JH/29 Move Events support from Experimental to mainline, enabled by default
433 and removable for a build by defining DISABLE_EVENT.
435 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
437 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
438 cached by the daemon.
440 JH/32 Move Redis support from Experimental to mainline, enabled for a build
441 by defining LOOKUP_REDIS. The libhiredis library is required.
443 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
444 keys are given for lookup.
446 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
447 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
448 only supported when built with TLS support. The PolarSSL SHA routines
449 are still used when the TLS library is too old for convenient support.
451 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
452 openssl_options), for security. OpenSSL forces this from version 1.1.0
453 server-side so match that on older versions.
455 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
456 allocation for $value could be released as the expansion processing
457 concluded, but leaving the global pointer active for it.
459 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
460 and to use the domains and local_parts ACL conditions.
462 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
463 incorrectly not doubled on cutthrough transmission, hence seen as a
464 body-termination at the receiving system - resulting in truncated mails.
465 Commonly the sender saw a TCP-level error, and retransmitted the message
466 via the normal store-and-forward channel. This could result in duplicates
467 received - but deduplicating mailstores were liable to retain only the
468 initial truncated version.
470 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
472 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
474 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
475 we're in there, support oversigning also; bug 1309.
477 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
479 HS/04 Add support for keep_environment and add_environment options.
481 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
482 either intentional arithmetic overflow during PRNG, or testing config-
485 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
486 delivery resulted in actual delivery. Cancel cutthrough before DATA
489 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
490 rejects a recipient: pass the reject to the originator.
492 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
493 Many were false-positives and ignorable, but it's worth fixing the
496 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
497 for the new environment-manipulation done at startup. Move the routines
498 from being local to tls.c to being global via the os.c file.
500 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
501 an extract embedded as result-arg for a map, the first arg for extract
502 is unavailable so we cannot tell if this is a numbered or keyed
503 extraction. Accept either.
509 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
512 JH/02 The smtp transport option "multi_domain" is now expanded.
514 JH/03 The smtp transport now requests PRDR by default, if the server offers
517 JH/04 Certificate name checking on server certificates, when exim is a client,
518 is now done by default. The transport option tls_verify_cert_hostnames
519 can be used to disable this per-host. The build option
520 EXPERIMENTAL_CERTNAMES is withdrawn.
522 JH/05 The value of the tls_verify_certificates smtp transport and main options
523 default to the word "system" to access the system default CA bundle.
524 For GnuTLS, only version 3.0.20 or later.
526 JH/06 Verification of the server certificate for a TLS connection is now tried
527 (but not required) by default. The verification status is now logged by
528 default, for both outbound TLS and client-certificate supplying inbound
531 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
534 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
535 Status Notification (bounce) messages are now MIME format per RFC 3464.
536 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
537 under the control of the dsn_advertise_hosts option, and routers may
538 have a dsn_lasthop option.
540 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
541 default, modifiable by a malware= option. The list separator for
542 the options can now be changed in the usual way. Bug 68.
544 JH/10 The smtp_receive_timeout main option is now expanded before use.
546 JH/11 The incoming_interface log option now also enables logging of the
547 local interface on delivery outgoing connections.
549 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
550 if the interface and destination host and port all match.
552 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
555 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
556 Patch from Andrew Lewis.
558 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
559 now supports optional time-restrictions, weighting, and priority
560 modifiers per server. Patch originally by <rommer@active.by>.
562 JH/16 The spamd_address main option now supports a mixed list of local
563 and remote servers. Remote servers can be IPv6 addresses, and
564 specify a port-range.
566 JH/17 Bug 68: The spamd_address main option now supports an optional
567 timeout value per server.
569 JH/18 Bug 1581: Router and transport options headers_add/remove can
570 now have the list separator specified.
572 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
575 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
578 JH/21 Support for the A6 type of dns record is withdrawn.
580 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
581 rather than the verbs used.
583 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
584 from 255 to 1024 chars.
586 JH/24 Verification callouts now attempt to use TLS by default.
588 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
589 are generic router options now. The defaults didn't change.
591 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
592 Original patch from Alexander Shikoff, worked over by JH.
594 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
595 files if ZCAT_COMMAND is not executable.
597 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
599 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
601 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
602 Normally benign, it bites when the pair was led to by a CNAME;
603 modern usage is to not canonicalize the domain to a CNAME target
604 (and we were inconsistent anyway for A-only vs AAAA+A).
606 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
608 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
609 when evaluating $sender_host_dnssec.
611 JH/31 Check the HELO verification lookup for DNSSEC, adding new
612 $sender_helo_dnssec variable.
614 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
616 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
618 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
620 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
621 documented as working, but never had. Support all but $spam_report.
623 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
624 added for tls authenticator.
626 HS/03 Add perl_taintmode main config option
632 TL/01 When running the test suite, the README says that variables such as
633 no_msglog_check are global and can be placed anywhere in a specific
634 test's script, however it was observed that placement needed to be near
635 the beginning for it to behave that way. Changed the runtest perl
636 script to read through the entire script once to detect and set these
637 variables, reset to the beginning of the script, and then run through
638 the script parsing/test process like normal.
640 TL/02 The BSD's have an arc4random API. One of the functions to induce
641 adding randomness was arc4random_stir(), but it has been removed in
642 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
643 function when detected.
645 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
646 cause callback expansion.
648 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
649 syntax errors in an expansion can be treated as a string instead of
650 logging or causing an error, due to the internal use of bool_lax
651 instead of bool when processing it.
653 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
654 server certificates when making smtp deliveries.
656 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
658 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
660 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
662 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
663 Merged patch from Sebastian Wiedenroth.
665 JH/05 Fix results-pipe from transport process. Several recipients, combined
666 with certificate use, exposed issues where response data items split
667 over buffer boundaries were not parsed properly. This eventually
668 resulted in duplicates being sent. This issue only became common enough
669 to notice due to the introduction of connection certificate information,
670 the item size being so much larger. Found and fixed by Wolfgang Breyha.
672 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
673 size buffer was used, resulting in syntax errors when an expansion
676 JH/07 Add support for directories of certificates when compiled with a GnuTLS
677 version 3.3.6 or later.
679 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
680 is EXPERIMENTAL_EVENT, the main-configuration and transport options
681 both become "event_action", the variables become $event_name, $event_data
682 and $event_defer_errno. There is a new variable $verify_mode, usable in
683 routers, transports and related events. The tls:cert event is now also
684 raised for inbound connections, if the main configuration event_action
687 TL/06 In test suite, disable OCSP for old versions of openssl which contained
688 early OCSP support, but no stapling (appears to be less than 1.0.0).
690 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
691 server certificate names available under the smtp transport option
692 "tls_verify_cert_hostname" now do not permit multi-component wildcard
695 JH/10 Time-related extraction expansions from certificates now use the main
696 option "timezone" setting for output formatting, and are consistent
697 between OpenSSL and GnuTLS compilations. Bug 1541.
699 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
700 encoded parameter in the incoming message. Bug 1558.
702 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
703 include certificate info, eximon was claiming there were spoolfile
706 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
708 JH/14 Log delivery-related information more consistently, using the sequence
709 "H=<name> [<ip>]" wherever possible.
711 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
712 are problematic for Debian distribution, omit them from the release
715 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
717 JH/16 Fix string representation of time values on 64bit time_t architectures.
720 JH/17 Fix a null-indirection in certextract expansions when a nondefault
721 output list separator was used.
726 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
727 checkers that were complaining about end of non-void function with no
730 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
731 This was a regression introduced in 4.83 by another bugfix.
733 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
735 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
736 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
742 TF/01 Correctly close the server side of TLS when forking for delivery.
744 When a message was received over SMTP with TLS, Exim failed to clear up
745 the incoming connection properly after forking off the child process to
746 deliver the message. In some situations the subsequent outgoing
747 delivery connection happened to have the same fd number as the incoming
748 connection previously had. Exim would try to use TLS and fail, logging
749 a "Bad file descriptor" error.
751 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
752 utilities have not been installed.
754 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
755 temporary space as the ACL may create new global variables.
757 TL/01 LDAP support uses per connection or global context settings, depending
758 upon the detected version of the libraries at build time.
760 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
761 to extract and use the src ip:port in logging and expansions as if it
762 were a direct connection from the outside internet. PPv2 support was
763 updated based on HAProxy spec change in May 2014.
765 JH/02 Add ${listextract {number}{list}{success}{fail}}.
767 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
768 Properly escape header and check for NULL return.
770 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
773 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
775 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
776 characters in header names, implemented as a verify condition.
777 Contributed by Michael Fischer v. Mollard.
779 TL/05 Rename SPF condition results err_perm and err_temp to standardized
780 results permerror and temperror. Previous values are deprecated but
781 still accepted. In a future release, err_perm and err_temp will be
782 completely removed, which will be a backward incompatibility if the
783 ACL tests for either of these two old results. Patch contributed by
784 user bes-internal on the mailing list.
786 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
788 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
789 selectors, in both main and reject logs.
791 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
794 JH/07 Add malware type "sock" for talking to simple daemon.
796 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
798 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
799 routers/transports under cutthrough routing.
801 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
802 numbers. Touch up "bool" conditional to keep the same definition.
804 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
806 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
808 JH/12 Expand items in router/transport headers_add or headers_remove lists
809 individually rather than the list as a whole. Bug 1452.
811 Required for reasonable handling of multiple headers_ options when
812 they may be empty; requires that headers_remove items with embedded
813 colons must have them doubled (or the list-separator changed).
815 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
816 view the policy declared in the DMARC record. Currently, $dmarc_status
817 is a combined value of both the record presence and the result of the
820 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
822 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
823 dnslookup router and the smtp transport (applying to the forward
826 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
827 of ldap servers used for a specific lookup. Patch provided by Heiko
830 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
831 New variable $lookup_dnssec_authenticated for observability.
833 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
834 Patch submitted by Lars Timman.
836 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
838 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
839 Requires trusted mode and valid format message id, aborts otherwise.
840 Patch contributed by Heiko Schlichting.
842 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
843 certextract with support for various fields. Bug 1358.
845 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
846 is requested by default, modifiable by smtp transport option
849 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
850 operate on certificate variables to give certificate fingerprints
851 Also new ${sha256:cert_variable}.
853 JH/23 The PRDR feature is moved from being Experimental into the mainline.
855 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
856 Christian Aistleitner.
858 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
860 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
861 file. Patch from Wolfgang Breyha.
863 JH/25 Expand the coverage of the delivery $host and $host_address to
864 client authenticators run in verify callout. Bug 1476.
866 JH/26 Port service names are now accepted for tls_on_connect_ports, to
867 align with daemon_smtp_ports. Bug 72.
869 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
870 support and error reporting did not work properly.
872 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
873 and is readable. Patch from Andrew Colin Kissa.
875 TL/14 Enhance documentation of ${run expansion and how it parses the
876 commandline after expansion, particularly in the case when an
877 unquoted variable expansion results in an empty value.
879 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
881 PP/02 Fix internal collision of T_APL on systems which support RFC3123
882 by renaming away from it. Addresses GH issue 15, reported by
885 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
887 TL/15 SECURITY: prevent double expansion in math comparison functions
888 (can expand unsanitized data). Not remotely exploitable.
895 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
897 PP/02 Make -n do something, by making it not do something.
898 When combined with -bP, the name of an option is not output.
900 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
903 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
904 $sender_host_name and config options to manage this, and basic check
907 PP/05 DSCP support for outbound connections and control modifier for inbound.
909 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
910 (Only plugin which currently uses this is kerberos4, which nobody should
911 be using, but we should make it available and other future plugins might
912 conceivably use it, even though it would break NAT; stuff *should* be
913 using channel bindings instead).
915 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
916 name; added for Sendmail compatibility; requires admin caller.
917 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
918 just ignore it); requires trusted caller.
919 Also parse but ignore: -Ac -Am -X<logfile>
922 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
924 TL/02 Add +smtp_confirmation as a default logging option.
926 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
927 Patch by Magnus Holmgren from 2007-02-20.
929 TL/04 Bugzilla 1281 - Spec typo.
930 Bugzilla 1283 - Spec typo.
931 Bugzilla 1290 - Spec grammar fixes.
933 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
935 TL/06 Add Experimental DMARC support using libopendmarc libraries.
937 TL/07 Fix an out of order global option causing a segfault. Reported to dev
938 mailing list by by Dmitry Isaikin.
940 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
942 JH/02 Support "G" suffix to numbers in ${if comparisons.
944 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
946 NM/01 Bugzilla 1197 - Spec typo
947 Bugzilla 1196 - Spec examples corrections
949 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
951 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
952 gnutls_enable_pkcs11, but renamed to more accurately indicate its
955 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
956 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
958 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
959 "acl {{name}{arg}...}", and optional args on acl condition
962 JH/05 Permit multiple router/transport headers_add/remove lines.
964 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
966 JH/07 Avoid using a waiting database for a single-message-only transport.
967 Performance patch from Paul Fisher. Bugzilla 1262.
969 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
972 JH/09 Add $headers_added variable, with content from use of ACL modifier
973 add_header (but not yet added to the message). Bugzilla 199.
975 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
976 Pulled from Bugzilla 817 by Wolfgang Breyha.
978 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
980 (nb: this is the same fix as in Exim 4.80.1)
982 JH/11 Add A= logging on delivery lines, and a client_set_id option on
985 JH/12 Add optional authenticated_sender logging to A= and a log_selector
988 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
990 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
991 advertise SMTP AUTH mechanism to us, instead of a generic
992 protocol violation error. Also, make Exim more robust to bad
993 data from the Dovecot auth socket.
995 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
997 When a queue runner is handling a message, Exim first routes the
998 recipient addresses, during which it prunes them based on the retry
999 hints database. After that it attempts to deliver the message to
1000 any remaining recipients. It then updates the hints database using
1003 So if a recipient address works intermittently, it can get repeatedly
1004 deferred at routing time. The retry hints record remains fresh so the
1005 address never reaches the final cutoff time.
1007 This is a fairly common occurrence when a user is bumping up against
1008 their storage quota. Exim had some logic in its local delivery code
1009 to deal with this. However it did not apply to per-recipient defers
1010 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1012 This change adds a proper retry rule check during routing so that the
1013 final cutoff time is checked against the message's age. We only do
1014 this check if there is an address retry record and there is not a
1015 domain retry record; this implies that previous attempts to handle
1016 the address had the retry_use_local_parts option turned on. We use
1017 this as an approximation for the destination being like a local
1018 delivery, as in LMTP.
1020 I suspect this new check makes the old local delivery cutoff check
1021 redundant, but I have not verified this so I left the code in place.
1023 TF/02 Correct gecos expansion when From: is a prefix of the username.
1025 Test 0254 submits a message to Exim with the header
1029 When I ran the test suite under the user fanf2, Exim expanded
1030 the header to contain my full name, whereas it should have added
1031 a Resent-Sender: header. It erroneously treats any prefix of the
1032 username as equal to the username.
1034 This change corrects that bug.
1036 GF/01 DCC debug and logging tidyup
1037 Error conditions log to paniclog rather than rejectlog.
1038 Debug lines prefixed by "DCC: " to remove any ambiguity.
1040 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1042 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1043 Bug spotted by Jeremy Harris; was flawed since initial commit.
1044 Would have resulted in OCSP responses post-SNI triggering an Exim
1045 NULL dereference and crash.
1047 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1049 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1050 Bug detection, analysis and fix by Samuel Thibault.
1051 Bugzilla 1331, Debian bug #698092.
1053 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1055 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1056 Server implementation by Todd Lyons, client by JH.
1057 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1058 config variable "prdr_enable" controls whether the server
1059 advertises the facility. If the client requests PRDR a new
1060 acl_data_smtp_prdr ACL is called once for each recipient, after
1061 the body content is received and before the acl_smtp_data ACL.
1062 The client is controlled by both of: a hosts_try_prdr option
1063 on the smtp transport, and the server advertisement.
1064 Default client logging of deliveries and rejections involving
1065 PRDR are flagged with the string "PRDR".
1067 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1068 fclose(). Diagnosis by Todd Lyons.
1070 PP/17 Update configure.default to handle IPv6 localhost better.
1071 Patch by Alain Williams (plus minor tweaks).
1074 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1075 This is now consistent with GnuTLS, and is now documented: the
1076 previous undocumented portable approach to treating the option as
1077 unset was to force an expansion failure. That still works, and
1078 an empty string is now equivalent.
1080 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1081 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1082 not performing validation itself.
1084 PP/20 Added force_command boolean option to pipe transport.
1085 Patch from Nick Koston, of cPanel Inc.
1087 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1090 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1092 PP/21 Fix eximon continuous updating with timestamped log-files.
1093 Broken in a format-string cleanup in 4.80, missed when I repaired the
1094 other false fix of the same issue.
1095 Report and fix from Heiko Schlichting.
1098 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1099 Report from Prashanth Katuri.
1101 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1102 It's SecureTransport, so affects any MacOS clients which use the
1103 system-integrated TLS libraries, including email clients.
1105 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1106 using a MIME ACL for non-SMTP local injection.
1107 Report and assistance in diagnosis by Warren Baker.
1109 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1111 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1113 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1114 last id that failed so it may be referenced in subsequent ACL's.
1116 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1119 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1120 ldap library initialization, allowing self-signed CA's to be
1121 used. Also properly sets require_cert option later in code by
1122 using NULL (global ldap config) instead of ldap handle (per
1123 session). Bug diagnosis and testing by alxgomz.
1125 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1126 the src/util/ subdirectory.
1128 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1129 renamed to Transport Post Delivery Action by Jeremy Harris, as
1132 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1133 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1134 redis_servers = needs to be configured which will be used by the redis
1135 lookup. Patch from Warren Baker, of The Packet Hub.
1137 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1139 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1140 hostname or reverse DNS when processing a host list. Used suggestions
1141 from multiple comments on this bug.
1143 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1145 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1146 Missed a few lines, added it to make the runtest require no keyboard
1149 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1150 contains upper case chars. Make router use caseful_local_part.
1152 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1153 support when GnuTLS has been built with p11-kit.
1159 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1161 This, or similar/improved, will also be change PP/11 of 4.82.
1167 PP/01 Handle short writes when writing local log-files.
1168 In practice, only affects FreeBSD (8 onwards).
1169 Bugzilla 1053, with thanks to Dmitry Isaikin.
1171 NM/01 Bugzilla 949 - Documentation tweak
1173 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1176 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1178 PP/02 Implemented gsasl authenticator.
1180 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1182 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1183 `pkg-config foo` for cflags/libs.
1185 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1186 with rest of GSASL and with heimdal_gssapi.
1188 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1189 `pkg-config foo` for cflags/libs for the TLS implementation.
1191 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1192 properties get this fed in as external SSF. A number of robustness
1193 and debugging improvements to the cyrus_sasl authenticator.
1195 PP/08 cyrus_sasl server now expands the server_realm option.
1197 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1198 Patch by Jeremy Harris.
1200 PP/10 Added dbmjz lookup type.
1202 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1204 PP/12 MAIL args handles TAB as well as SP, for better interop with
1205 non-compliant senders.
1206 Analysis and variant patch by Todd Lyons.
1208 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1209 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1210 Patch from Dirk Mueller <dmueller@suse.com>
1212 PP/13 tls_peerdn now print-escaped for spool files.
1213 Observed some $tls_peerdn in wild which contained \n, which resulted
1214 in spool file corruption.
1216 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1217 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1218 or write after TLS renegotiation, which otherwise led to messages
1221 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1222 as a tracking header (ie: a signed header comes before the signature).
1223 Patch from Wolfgang Breyha.
1225 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1226 comma-sep list; embedded commas doubled.
1228 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1230 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1232 Report and patch from Dmitry Banschikov.
1234 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1235 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1236 failures. We appear to now support TLS1.1+ with Exim.
1238 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1239 lets Exim select keys and certificates based upon TLS SNI from client.
1240 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1241 before an outbound SMTP session. New log_selector, +tls_sni.
1243 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1244 NULL dereference. Report and patch from Alun Jones.
1246 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1247 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1248 Not seeing resolver debug output on NetBSD, but suspect this is a
1249 resolver implementation change.
1251 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1252 Left warnings. Added "eximon gdb" invocation mode.
1254 PP/21 Defaulting "accept_8bitmime" to true, not false.
1256 PP/22 Added -bw for inetd wait mode support.
1258 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1259 locate the relevant includes and libraries. Made this the default.
1261 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1262 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1264 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1265 This may cause build issues on older platforms.
1267 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1268 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1269 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1270 Added SNI support via GnuTLS too.
1271 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1273 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1275 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1276 Applied second patch from Janne, implementing suggestion to default
1277 multiple-strings-in-record handling to match SPF spec.
1279 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1281 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1282 read-only, out of scope).
1283 Patch from Wolfgang Breyha, report from Stuart Northfield.
1285 PP/29 Fix three issues highlighted by clang analyser static analysis.
1286 Only crash-plausible issue would require the Cambridge-specific
1287 iplookup router and a misconfiguration.
1288 Report from Marcin Mirosław.
1290 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1292 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1293 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1294 As part of this, removing so much warning spew let me fix some minor
1295 real issues in debug logging.
1297 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1298 assignment on my part. Fixed.
1300 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1301 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1302 Janne Snabb (who went above and beyond: thank you).
1304 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1305 string otherwise requires a connection and a bunch more work and it's
1306 relatively easy to get wrong. Should also expose TLS library linkage
1309 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1310 64-bit ${eval} (JH/03).
1312 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1313 GNU libc to support some of the 64-bit stuff, should not lead to
1314 conflicts. Defined before os.h is pulled in, so if a given platform
1315 needs to override this, it can.
1317 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1318 protection layer was required, which is not implemented.
1319 Bugzilla 1254, patch from Wolfgang Breyha.
1321 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1322 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1323 tls_dhparam take prime identifiers. Also unbreak combination of
1324 OpenSSL+DH_params+TLSSNI.
1326 PP/39 Disable SSLv2 by default in OpenSSL support.
1332 PP/01 Solaris build fix for Oracle's LDAP libraries.
1333 Bugzilla 1109, patch from Stephen Usher.
1335 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1337 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1340 TF/02 Fix a couple more cases where we did not log the error message
1341 when unlink() failed. See also change 4.74-TF/03.
1343 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1344 lock up or crash if it happened to be inside a call to libc when it
1345 got a SIGUSR1 from exiwhat.
1347 The SIGUSR1 handler appends the current process status to the process
1348 log which is later printed by exiwhat. It used to use the general
1349 purpose logging code to do this, but several functions it calls are
1350 not safe for signals.
1352 The new output code in the SIGUSR1 handler is specific to the process
1353 log, and simple enough that it's easy to inspect for signal safety.
1354 Removing some special cases also simplifies the general logging code.
1355 Removing the spurious timestamps from the process log simplifies
1358 TF/04 Improved ratelimit ACL condition.
1360 The /noupdate option has been deprecated in favour of /readonly which
1361 has clearer semantics. The /leaky, /strict, and /readonly update modes
1362 are mutually exclusive. The update mode is no longer included in the
1363 database key; it just determines when the database is updated. (This
1364 means that when you upgrade Exim will forget old rate measurements.)
1366 Exim now checks that the per_* options are used with an update mode that
1367 makes sense for the current ACL. For example, when Exim is processing a
1368 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1369 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1370 must specify per_mail/readonly. If you omit the update mode it defaults to
1371 /leaky where that makes sense (as before) or /readonly where required.
1373 The /noupdate option is now undocumented but still supported for
1374 backwards compatibility. It is equivalent to /readonly except that in
1375 ACLs where /readonly is required you may specify /leaky/noupdate or
1376 /strict/noupdate which are treated the same as /readonly.
1378 A useful new feature is the /count= option. This is a generalization
1379 of the per_byte option, so that you can measure the throughput of other
1380 aggregate values. For example, the per_byte option is now equivalent
1381 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1383 The per_rcpt option has been generalized using the /count= mechanism
1384 (though it's more complicated than the per_byte equivalence). When it is
1385 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1386 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1387 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1388 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1389 Note that using per_rcpt with a non-readonly update mode in more than
1390 one ACL will cause the recipients to be double-counted. (The per_mail
1391 and per_byte options don't have this problem.)
1393 The handling of very low rates has changed slightly. If the computed rate
1394 is less than the event's count (usually one) then this event is the first
1395 after a long gap. In this case the rate is set to the same as this event's
1396 count, so that the first message of a spam run is counted properly.
1398 The major new feature is a mechanism for counting the rate of unique
1399 events. The new per_addr option counts the number of different
1400 recipients that someone has sent messages to in the last time period. It
1401 behaves like per_rcpt if all the recipient addresses are different, but
1402 duplicate recipient addresses do not increase the measured rate. Like
1403 the /count= option this is a general mechanism, so the per_addr option
1404 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1405 example, measure the rate that a client uses different sender addresses
1406 with the options per_mail/unique=$sender_address. There are further
1407 details in the main documentation.
1409 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1411 TF/06 Removed a few PCRE remnants.
1413 TF/07 Automatically extract Exim's version number from tags in the git
1414 repository when doing development or release builds.
1416 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1417 Bugzilla 879. Patch from Paul Fisher.
1419 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1420 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1423 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1425 PP/05 Variable $av_failed, true if the AV scanner deferred.
1426 Bugzilla 1078. Patch from John Horne.
1428 PP/06 Stop make process more reliably on build failure.
1429 Bugzilla 1087. Patch from Heiko Schlittermann.
1431 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1432 Bugzilla 1089. Patch from Heiko Schlittermann.
1434 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1435 Bugzilla 1131. Patch from Holger Weiß.
1437 PP/09 Handle IPv6 addresses with SPF.
1438 Bugzilla 860. Patch from Wolfgang Breyha.
1440 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1442 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1445 PP/11 match_* no longer expand right-hand-side by default.
1446 New compile-time build option, EXPAND_LISTMATCH_RHS.
1447 New expansion conditions, "inlist", "inlisti".
1449 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1451 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1453 PP/14 fix log_write() format string regression from TF/03.
1454 Bugzilla 1152. Patch from Dmitry Isaikin.
1460 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1462 PP/02 Harmonised TLS library version reporting; only show if debugging.
1463 Layout now matches that introduced for other libraries in 4.74 PP/03.
1465 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1467 PP/04 New "dns_use_edns0" global option.
1469 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1472 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1473 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1475 TK/01 Updated PolarSSL code to 0.14.2.
1476 Bugzilla 1097. Patch from Andreas Metzler.
1478 PP/07 Catch divide-by-zero in ${eval:...}.
1479 Fixes bugzilla 1102.
1481 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1484 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1485 format-string attack -- SECURITY: remote arbitrary code execution.
1487 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1488 time unintentionally subject to list matching rules, letting the header
1489 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1490 arbitrary string expansion). This allowed for information disclosure.
1492 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1493 INT_MIN/-1 -- value coerced to INT_MAX.
1499 NM/01 Workaround for PCRE version dependency in version reporting
1502 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1503 This fixes portability to compilers other than gcc, notably
1504 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1506 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1507 makefiles for portability to HP-UX and POSIX correctness.
1509 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1510 Also via indented variable definition in the Makefile.
1511 (Debugging by Oliver Heesakkers).
1513 PP/02 Restore caching of spamd results with expanded spamd_address.
1514 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1516 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1517 Improves build reliability. Fix from: Frank Elsner
1519 NM/02 Fix wide character breakage in the rfc2047 coding
1520 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1522 NM/03 Allow underscore in dnslist lookups
1523 Fixes bug 1026. Patch from Graeme Fowler
1525 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1526 Code patches from Adam Ciarcinski of NetBSD.
1528 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1531 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1532 is logged, to avoid truncation. Patch from John Horne.
1534 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1535 Patch from Jakob Hirsch.
1537 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1538 SQL string expansion failure details.
1539 Patch from Andrey Oktyabrski.
1541 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1542 Patch from Simon Arlott.
1544 PP/09 New lookups functionality failed to compile on old gcc which rejects
1545 extern declarations in function scope.
1546 Patch from Oliver Fleischmann
1548 PP/10 Use sig_atomic_t for flags set from signal handlers.
1549 Check getgroups() return and improve debugging.
1550 Fixed developed for diagnosis in bug 927 (which turned out to be
1553 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1554 Patch from Mark Zealey.
1556 PP/12 Bugzilla 1056: Improved spamd server selection.
1557 Patch from Mark Zealey.
1559 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1560 Based on patch from Heiko Schlittermann.
1562 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1563 Patch from Uwe Doering, sign-off by Michael Haardt.
1565 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1566 variable declaration deep within a block. Bug and patch from
1569 PP/15 lookups-Makefile IRIX compatibility coercion.
1571 PP/16 Make DISABLE_DKIM build knob functional.
1573 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1574 Patch by Simon Arlott
1576 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1577 variable argument macros. Our copy now differs from upstream.
1583 TF/01 Failure to get a lock on a hints database can have serious
1584 consequences so log it to the panic log.
1586 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1587 controlled using the smtp_confirmation log selector.
1589 TF/03 Include the error message when we fail to unlink a spool file.
1591 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1592 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1593 for maintaining out-of-tree patches for some time.
1595 PP/01 Bugzilla 139: Documentation and portability issues.
1596 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1597 Handle per-OS dynamic-module compilation flags.
1599 PP/02 Let /dev/null have normal permissions.
1600 The 4.73 fixes were a little too stringent and complained about the
1601 permissions on /dev/null. Exempt it from some checks.
1602 Reported by Andreas M. Kirchwitz.
1604 PP/03 Report version information for many libraries, including
1605 Exim version information for dynamically loaded libraries. Created
1606 version.h, now support a version extension string for distributors
1607 who patch heavily. Dynamic module ABI change.
1609 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1610 privilege escalation vulnerability whereby the Exim run-time user
1611 can cause root to append content of the attacker's choosing to
1614 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1617 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1618 If dropping privileges for untrusted macros, we disabled normal logging
1619 on the basis that it would fail; for the Exim run-time user, this is not
1620 the case, and it resulted in successful deliveries going unlogged.
1621 Fixed. Reported by Andreas Metzler.
1627 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1628 only prepend for the Resent-* case. Fixes regression introduced in
1629 Exim 4.70 by NM/22 for Bugzilla 607.
1631 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1632 increasing numbers of administrators be bitten by this.
1634 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1636 PP/03 Bugzilla 994: added openssl_options main configuration option.
1638 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1640 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1642 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1644 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1645 without a peer certificate, leading to a segfault because of an
1646 assumption that peers always have certificates. Be a little more
1647 paranoid. Problem reported by Martin Tscholak.
1649 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1650 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1651 NB: ClamAV planning to remove STREAM in "middle of 2010".
1652 CL also introduces -bmalware, various -d+acl logging additions and
1653 more caution in buffer sizes.
1655 PP/09 Implemented reverse_ip expansion operator.
1657 PP/10 Bugzilla 937: provide a "debug" ACL control.
1659 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1661 PP/12 Bugzilla 973: Implement --version.
1663 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1665 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1667 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1669 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1670 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1671 ignore trailing whitespace.
1673 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1675 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1678 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1679 Notification from Dr Andrew Aitchison.
1681 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1682 ExtendedDetectionInfo response format.
1683 Notification from John Horne.
1685 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1688 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1689 XSL and documented dependency on system catalogs, with examples of how
1692 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1695 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1696 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1697 configuration file which is writeable by the Exim user or group.
1699 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1700 of configuration files to cover files specified with the -C option if
1701 they are going to be used with root privileges, not just the default
1704 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1705 option (effectively making it always true).
1707 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1708 files to be used while preserving root privileges.
1710 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1711 that rogue child processes cannot use them.
1713 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1714 run-time user, instead of root.
1716 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1717 Exim run-time user without dropping privileges.
1719 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1720 result string, instead of calling string_vformat() twice with the same
1723 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1724 for other users. Others should always drop root privileges if they use
1725 -C on the command line, even for a whitelisted configure file.
1727 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1729 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1735 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1736 $data_path, and $header_path variables; fixed documentation bugs and
1739 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1740 exipick to access non-standard spools, including the "frozen" queue
1743 NM/01 Bugzilla 965: Support mysql stored procedures.
1744 Patch from Alain Williams
1746 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1748 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1749 Patch from Andreas Metzler
1751 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1752 Patch from Kirill Miazine
1754 NM/05 Bugzilla 671: Added umask to procmail example.
1756 JJ/03 installed exipick 20100323.0, fixing doc bug
1758 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1759 directory. Notification and patch from Dan Rosenberg.
1761 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1763 TK/02 Improve log output when DKIM signing operation fails.
1765 MH/01 Treat the transport option dkim_domain as a colon separated
1766 list, not as a single string, and sign the message with each element,
1767 omitting multiple occurences of the same signer.
1769 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1770 Bugzilla 985, 986. Patch by Simon Arlott
1772 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1773 Patch by Simon Arlott
1775 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1776 MBX locking. Notification from Dan Rosenberg.
1782 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1784 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1786 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1788 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1790 NM/04 Bugzilla 915: Flag broken perl installation during build.
1796 TK/01 Added patch by Johannes Berg that expands the main option
1797 "spamd_address" if it starts with a dollar sign.
1799 TK/02 Write list of recipients to X-Envelope-Sender header when building
1800 the mbox-format spool file for content scanning (suggested by Jakob
1803 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1804 (http://www.dcc-servers.net/) support via dccifd. Activated by
1805 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1807 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1808 by Mark Daniel Reidel <mr@df.eu>.
1810 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1811 When building exim an external PCRE library is now needed -
1812 PCRE is a system library on the majority of modern systems.
1813 See entry on PCRE_LIBS in EDITME file.
1815 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1816 conversation. Added nologin parameter to request.
1817 Patch contributed by Kirill Miazine.
1819 TF/01 Do not log submission mode rewrites if they do not change the address.
1821 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1823 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1824 log files in place. Contributed by Roberto Lima.
1826 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1828 TF/03 Bugzilla 615: When checking the local_parts router precondition
1829 after a local_part_suffix or local_part_prefix option, Exim now
1830 does not use the address's named list lookup cache, since this
1831 contains cached lookups for the whole local part.
1833 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1834 Robert Millan. Documentation is in experimental-spec.txt.
1836 TF/04 Bugzilla 668: Fix parallel build (make -j).
1838 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1840 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1841 Patch provided by Jan Srzednicki.
1843 TF/05 Leading white space used to be stripped from $spam_report which
1844 wrecked the formatting. Now it is preserved.
1846 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1847 that they are available at delivery time.
1849 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1851 TF/08 TLS error reporting now respects the incoming_interface and
1852 incoming_port log selectors.
1854 TF/09 Produce a more useful error message if an SMTP transport's hosts
1855 setting expands to an empty string.
1857 NM/06 Bugzilla 744: EXPN did not work under TLS.
1858 Patch provided by Phil Pennock.
1860 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1861 Patch provided by Richard Godbee.
1863 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1864 acl_smtp_notquit, added index entry.
1866 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1867 Patch provided by Eugene Bujak.
1869 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1870 accept(). Patch provided by Maxim Dounin.
1872 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1873 Patch provided by Phil Pennock.
1875 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1877 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1878 Patch provided by Brad "anomie" Jorsch.
1880 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1881 Patch provided by Dean Brooks.
1883 TK/05 Add native DKIM support (does not depend on external libraries).
1885 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1886 Patch provided by Graeme Fowler.
1888 NM/16 Bugzilla 851: Documentation example syntax fix.
1890 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1892 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1895 NM/19 Bugzilla 745: TLS version reporting.
1896 Patch provided by Phil Pennock.
1898 NM/20 Bugzilla 167: bool: condition support.
1899 Patch provided by Phil Pennock.
1901 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1902 clients. Patch provided by Phil Pennock.
1904 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1905 Patch provided by Brad "anomie" Jorsch.
1907 NM/23 Bugzilla 687: Fix misparses in eximstats.
1908 Patch provided by Heiko Schlittermann.
1910 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1911 Patch provided by Heiko Schlittermann.
1913 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1914 plus update to original patch.
1916 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1918 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1919 Patch provided by David Brownlee.
1921 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1923 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1925 NM/30 Bugzilla 888: TLS documentation bugfixes.
1927 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1929 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1930 Unlike the original bugzilla I have changed all shell scripts in src tree.
1932 NM/33 Bugzilla 898: Transport filter timeout fix.
1933 Patch by Todd Rinaldo.
1935 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1936 Patch by Serge Demonchaux.
1938 NM/35 Bugzilla 39: Base64 decode bug fixes.
1939 Patch by Jakob Hirsch.
1941 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1943 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1945 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1947 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1953 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1954 ALT-N's libdkim that I have put here:
1955 http://duncanthrax.net/exim-experimental/
1957 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1958 were called 'true' and it seems that C99 defines that as a reserved
1959 keyword to be used with 'bool' variable types. That means you could
1960 not include C99-style headers which use bools without triggering
1961 build errors in sieve.c.
1963 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1964 as mailq or other aliases. Changed the --help handling significantly
1965 to do whats expected. exim_usage() emits usage/help information.
1967 SC/01 Added the -bylocaldomain option to eximstats.
1969 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1971 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1973 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1979 PH/01 Another patch from the Sieve maintainer.
1981 PH/02 When an IPv6 address is converted to a string for single-key lookup
1982 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1983 dots are used instead of colons so that keys in lsearch files need not
1984 contain colons. This was done some time before quoting was made available
1985 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1986 (notated using the quote facility) so as to distinguish them from IPv4
1987 keys. This meant that lookups for IP addresses in host lists did not work
1988 for iplsearch lookups.
1990 This has been fixed by arranging for IPv6 addresses to be expressed with
1991 colons if the lookup type is iplsearch. This is not incompatible, because
1992 previously such lookups could never work.
1994 The situation is now rather anomalous, since one *can* have colons in
1995 ordinary lsearch keys. However, making the change in all cases is
1996 incompatible and would probably break a number of configurations.
1998 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2001 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2002 conversion specification without a maximum field width, thereby enabling
2003 a rogue spamd server to cause a buffer overflow. While nobody in their
2004 right mind would setup Exim to query an untrusted spamd server, an
2005 attacker that gains access to a server running spamd could potentially
2006 exploit this vulnerability to run arbitrary code as the Exim user.
2008 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2009 $primary_hostname instead of what libspf2 thinks the hosts name is.
2011 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2012 a directory entry by the name of the lookup key. Previously, if a
2013 symlink pointed to a non-existing file or a file in a directory that
2014 Exim lacked permissions to read, a lookup for a key matching that
2015 symlink would fail. Now it is enough that a matching directory entry
2016 exists, symlink or not. (Bugzilla 503.)
2018 PH/03 The body_linecount and body_zerocount variables are now exported in the
2021 PH/04 Added the $dnslist_matched variable.
2023 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2024 This means they are set thereafter only if the connection becomes
2027 PH/06 Added the client_condition to authenticators so that some can be skipped
2028 by clients under certain conditions.
2030 PH/07 The error message for a badly-placed control=no_multiline_responses left
2031 "_responses" off the end of the name.
2033 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2035 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2036 (without spaces) instead of just copying the configuration text.
2038 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2040 PH/11 Added $max_received_linelength.
2042 PH/12 Added +ignore_defer and +include_defer to host lists.
2044 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2045 way in which PCRE > 7.0 is built.
2047 PH/14 Implemented queue_only_load_latch.
2049 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2050 MAIL command. The effect was to mangle the value on 64-bit systems.
2052 PH/16 Another patch from the Sieve maintainer.
2054 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2056 PH/18 If a system quota error occurred while trying to create the file for
2057 a maildir delivery, the message "Mailbox is full" was not appended to the
2058 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2059 only to a quota excession during the actual writing of the file.
2061 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2062 characters?) which causes problems in log lines. The DN values are now
2063 passed through string_printing() before being added to log lines.
2065 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2066 and InterBase are left for another time.)
2068 PH/21 Added message_body_newlines option.
2070 PH/22 Guard against possible overflow in moan_check_errorcopy().
2072 PH/23 POSIX allows open() to be a macro; guard against that.
2074 PH/24 If the recipient of an error message contained an @ in the local part
2075 (suitably quoted, of course), incorrect values were put in $domain and
2076 $local_part during the evaluation of errors_copy.
2082 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2083 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2086 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2087 issue a MAIL command.
2089 PH/02 In an ACL statement such as
2091 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2093 if a client was not listed at all, or was listed with a value other than
2094 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2095 the condition was not true (as it should be), so access was not denied.
2096 The bug was that the ! inversion was incorrectly passed on to the second
2097 item. This has been fixed.
2099 PH/03 Added additional dnslists conditions == and =& which are different from
2100 = and & when the dns lookup returns more than one IP address.
2102 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2103 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2105 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2106 FSYNC, which compiles an option called disable_fsync that allows for
2107 bypassing fsync(). The documentation is heavily laced with warnings.
2109 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2111 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2112 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2113 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2114 including adding "make clean"; (3) Added -fPIC when compiling the test
2115 dynamically loaded module, to get rid of a warning.
2117 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2118 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2119 = 0s. The bug is otherwise harmless.
2121 PH/07 There was a bug in the dovecot authenticator such that the value of
2122 $auth1 could be overwritten, and so not correctly preserved, after a
2123 successful authentication. This usually meant that the value preserved by
2124 the server_setid option was incorrect.
2126 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2128 PH/09 Installed PCRE release 7.0.
2130 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2131 run for batched SMTP input. It is now run at the start of every message
2132 in the batch. While fixing this I discovered that the process information
2133 (output by running exiwhat) was not always getting set for -bs and -bS
2134 input. This is fixed, and it now also says "batched" for BSMTP.
2136 PH/11 Added control=no_pipelining.
2138 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2139 patch, slightly modified), and move the expansion of helo_data till after
2140 the connection is made in the smtp transport (so it can use these
2143 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2145 PH/14 Added log_selector = +pid.
2147 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2149 PH/16 Add ${if forany and ${if forall.
2151 PH/17 Added dsn_from option to vary the From: line in DSNs.
2153 PH/18 Flush SMTP output before performing a callout, unless control =
2154 no_callout_flush is set.
2156 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2157 was true (the default) a successful delivery failed to delete the retry
2158 item, thus causing premature timeout of the address. The bug is now
2161 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2163 PH/21 Long custom messages for fakedefer and fakereject are now split up
2164 into multiline responses in the same way that messages for "deny" and
2165 other ACL rejections are.
2167 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2168 with slight modification.
2170 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2171 draft, changing the syntax and factoring some duplicate code".
2173 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2174 for deliveries of the second and subsequent messages over the same SMTP
2177 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2178 ${reduce, with only minor "tidies".
2180 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2182 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2183 expansion side effects.
2185 PH/27 When a message times out after an over-quota error from an Exim-imposed
2186 quota, the bounce message says "mailbox is full". This message was not
2187 being given when it was a system quota that was exceeded. It now should
2190 MH/03 Made $recipients available in local_scan(). local_scan() already has
2191 better access to the recipient list through recipients_list[], but
2192 $recipients can be useful in postmaster-provided expansion strings.
2194 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2195 in the case of a MAIL command with additional options following the
2196 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2197 were accidentally chopped off.
2199 PH/29 SMTP synchronization checks are implemented when a command is read -
2200 there is a check that no more input is waiting when there shouldn't be
2201 any. However, for some commands, a delay in an ACL can mean that it is
2202 some time before the response is written. In this time, more input might
2203 arrive, invalidly. So now there are extra checks after an ACL has run for
2204 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2205 pipelining has not been advertised.
2207 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2209 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2210 returned in the SMTP response when smtp_return_error_details was false.
2211 This has been fixed.
2213 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2214 instead of the C I/O that was originally supplied, because problems were
2215 reported on Solaris.
2217 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2218 Exim which did not show up earlier: it was assuming that a call to
2219 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2220 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2221 was a macro that became an assignment, so it seemed to work. This has
2222 changed to a proper function call with a void return, hence the compile
2223 error. Exim's code has been fixed.
2225 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2228 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2230 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2232 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2233 because it turns out to be too big or there is a timeout) there is no
2234 "Completed" line in the log. When some messages of this type were
2235 selected by exigrep, they were listed as "not completed". Others were
2236 picked up by some special patterns. I have improved the selection
2237 criteria to be more general.
2239 PH/38 The host_find_failed option in the manualroute router can now be set
2240 to "ignore", to completely ignore a host whose IP address cannot be
2241 found. If all hosts are ignored, the behaviour is controlled by the new
2242 host_all_ignored option.
2244 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2245 homing or because of multiple MX records with /mx) generated more than
2246 one IP address, and the following item turned out to be the local host,
2247 all the secondary addresses of the first item were incorrectly removed
2248 from the list, along with the local host and any following hosts (which
2249 is what is supposed to happen).
2251 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2252 whoever called Exim into the -H file. In the case of the daemon it was
2253 behaving confusingly. When first started, it used values for whoever
2254 started the daemon, but after a SIGHUP it used the Exim user (because it
2255 calls itself on a restart). I have changed the code so that it now always
2258 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2259 message are rejected with the same error (e.g. no authentication or bad
2260 sender address), and a DATA command is nevertheless sent (as can happen
2261 with PIPELINING or a stupid MUA), the error message that was given to the
2262 RCPT commands is included in the rejection of the DATA command. This is
2263 intended to be helpful for MUAs that show only the final error to their
2266 PH/42 Another patch from the Sieve maintainer.
2268 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2269 Eximstats - Fixed some broken HTML links and added missing column headers
2271 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2272 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2274 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2276 PH/43 Yet another patch from the Sieve maintainer.
2278 PH/44 I found a way to check for a TCP/IP connection going away before sending
2279 the response to the final '.' that terminates a message, but only in the
2280 case where the client has not sent further data following the '.'
2281 (unfortunately, this is allowed). However, in many cases there won't be
2282 any further data because there won't be any more messages to send. A call
2283 to select() can be used: if it shows that the input is "ready", there is
2284 either input waiting, or the socket has been closed. An attempt to read
2285 the next input character can distinguish the two cases. Previously, Exim
2286 would have sent an OK response which the client would never have see.
2287 This could lead to message repetition. This fix should cure that, at
2288 least in a lot of common cases.
2290 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2291 advertised in response to EHLO.
2297 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2298 fixed by 4.65/MH/01 (is this a record?) are fixed:
2300 (i) An empty string was always treated as zero by the numeric comparison
2301 operators. This behaviour has been restored.
2303 (ii) It is documented that the numeric comparison operators always treat
2304 their arguments as decimal numbers. This was broken in that numbers
2305 starting with 0 were being interpreted as octal.
2307 While fixing these problems I realized that there was another issue that
2308 hadn't been noticed. Values of message_size_limit (both the global option
2309 and the transport option) were treated as octal if they started with 0.
2310 The documentation was vague. These values are now always treated as
2311 decimal, and I will make that clear in the documentation.
2317 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2318 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2321 MH/01 Don't check that the operands of numeric comparison operators are
2322 integers when their expansion is in "skipping" mode (fixes bug
2323 introduced by 4.64-PH/07).
2325 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2326 child addresses, Exim now panics and dies. Previously, because the count
2327 is held in a short int, deliveries were likely to be lost. As such a
2328 large number of recipients for a single message is ridiculous
2329 (performance will be very, very poor), I have chosen to impose a limit
2330 rather than extend the field.
2336 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2337 leftover -K file (the existence of which was triggered by #402).
2338 While we were at it, introduced process PID as part of the -K
2339 filename. This should rule out race conditions when creating
2342 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2343 processing considerably. Previous code took too long for large mails,
2344 triggering a timeout which in turn triggers #401.
2346 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2347 in the DK code in transports.c. sendfile() is not really portable,
2348 hence the _LINUX specificness.
2350 TF/01 In the add_headers option to the mail command in an Exim filter,
2351 there was a bug that Exim would claim a syntax error in any
2352 header after the first one which had an odd number of characters
2355 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2356 callout verification, Exim cached a "reject" for the entire domain. This
2357 is correct for most verifications, but it is not correct for a recipient
2358 verification with use_sender or use_postmaster set, because in that case
2359 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2360 case of MAIL FROM:<> rejection from other early rejections (e.g.
2361 rejection of HELO). When verifying a recipient using a non-null MAIL
2362 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2363 Whatever the result of the callout, the value of the domain cache is
2364 left unchanged (for any other kind of callout, getting as far as trying
2365 RCPT means that the domain itself is ok).
2367 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2370 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2371 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2372 session, the daemon ignores ECONNECT errors and logs others; it now
2373 ignores EPIPE as well.
2375 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2376 (quoted-printable decoding).
2378 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2379 later the small subsequent patch to fix an introduced bug.
2381 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2383 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2385 PH/08 An error is now given if message_size_limit is specified negative.
2387 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2388 to be given (somewhat) arbitrary names.
2390 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2393 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2394 miscellaneous code fixes
2396 PH/10 Added the log_reject_target ACL modifier to specify where to log
2399 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2400 hostname. This is wrong, because it relates to the incoming message (and
2401 probably the interface on which it is arriving) and not to the outgoing
2402 callout (which could be using a different interface). This has been
2403 changed to use the value of the helo_data option from the smtp transport
2404 instead - this is what is used when a message is actually being sent. If
2405 there is no remote transport (possible with a router that sets up host
2406 addresses), $smtp_active_hostname is used.
2408 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2409 tweaks were necessary in order to get it to work (see also 21 below):
2410 (a) The code assumed that strncpy() returns a negative number on buffer
2411 overflow, which isn't the case. Replaced with Exim's string_format()
2413 (b) There were several signed/unsigned issues. I just did the minimum
2414 hacking in of casts. There is scope for a larger refactoring.
2415 (c) The code used strcasecmp() which is not a standard C function.
2416 Replaced with Exim's strcmpic() function.
2417 (d) The code set only $1; it now sets $auth1 as well.
2418 (e) A simple test gave the error "authentication client didn't specify
2419 service in request". It would seem that Dovecot has changed its
2420 interface. Fortunately there's a specification; I followed it and
2421 changed what the client sends and it appears to be working now.
2423 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2426 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2427 address A is aliased to B and C, where B exists and C does not. Without
2428 -v the output is "A verified" because verification stops after a
2429 successful redirection if more than one address is generated. However,
2430 with -v the child addresses are also verified. Exim was outputting "A
2431 failed to verify" and then showing the successful verification for C,
2432 with its parentage. It now outputs "B failed to verify", showing B's
2433 parentage before showing the successful verification of C.
2435 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2436 look up a TXT record in a specific list after matching in a combined
2439 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2440 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2441 they consult the DNS. I had assumed they would set it the way they
2442 wanted; and indeed my experiments on Linux seem to show that in some
2443 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2444 To be on the safe side, however, I have now made the interface to
2445 host_find_byname() similar to host_find_bydns(), with an argument
2446 containing the DNS resolver options. The host_find_byname() function now
2447 sets these options at its start, just as host_find_bydns() does. The smtp
2448 transport options dns_qualify_single and dns_search_parents are passed to
2449 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2450 of host_find_byname() use the default settings of RES_DEFNAMES
2451 (qualify_single) but not RES_DNSRCH (search_parents).
2453 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2454 spool_read_header() do less string testing, by means of a preliminary
2455 switch on the second character of optional "-foo" lines. (This is
2456 overdue, caused by the large number of possibilities that now exist.
2457 Originally there were few.) While I was there, I also converted the
2458 str(n)cmp tests so they don't re-test the leading "-" and the first
2459 character, in the hope this might squeeze out yet more improvement.
2461 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2462 flag allowing group syntax was set by the header_syntax check but not
2463 turned off, possible causing trouble later; (2) The flag was not being
2464 set at all for the header_verify test, causing "group"-style headers to
2465 be rejected. I have now set it in this case, and also caused header_
2466 verify to ignore an empty address taken from a group. While doing this, I
2467 came across some other cases where the code for allowing group syntax
2468 while scanning a header line wasn't quite right (mostly, not resetting
2469 the flag correctly in the right place). These bugs could have caused
2470 trouble for malformed header lines. I hope it is now all correct.
2472 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2473 with the "reply" argument non-NULL. The code, however (which originally
2474 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2475 but it didn't always do it. This confused somebody who was copying the
2476 code for some other use. I have removed all the tests.
2478 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2479 feature that was used to support insecure browsers during the U.S. crypto
2480 embargo. It requires special client support, and Exim is probably the
2481 only MTA that supported it -- and would never use it because real RSA is
2482 always available. This code has been removed, because it had the bad
2483 effect of slowing Exim down by computing (never used) parameters for the
2484 RSA_EXPORT functionality.
2486 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2487 authenticator to fail if there's a tab character in the incoming data
2488 (there should never be unless someone is messing about, as it's supposed
2489 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2490 if the connection is using TLS or if the remote IP is the same as the
2491 local IP, and the "valid-client-cert option" if a client certificate has
2494 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2495 authenticators. This can be used for authorization after authentication
2496 succeeds. (In the case of plaintext, it servers for both authentication
2499 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2500 if any retry times were supplied.
2502 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2503 connection, where there is no client IP address to check. In this
2504 situation, the verify now always succeeds.
2506 PH/25 Applied John Jetmore's -Mset patch.
2508 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2510 PH/27 In a string expansion for a processed (not raw) header when multiple
2511 headers of the same name were present, leading whitespace was being
2512 removed from all of them, but trailing whitespace was being removed only
2513 from the last one. Now trailing whitespace is removed from each header
2514 before concatenation. Completely empty headers in a concatenation (as
2515 before) are ignored.
2517 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2518 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2520 PH/29 [Removed. This was a change that I later backed out, and forgot to
2521 correct the ChangeLog entry (that I had efficiently created) before
2522 committing the later change.]
2524 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2525 address errors (4xx response to RCPT) over the same connection as other
2526 messages routed to the same hosts. Such deliveries are always "forced",
2527 so retry times are not inspected. This resulted in far too many retries
2528 for the affected addresses. The effect occurred only when there were more
2529 hosts than the hosts_max_try setting in the smtp transport when it had
2530 the 4xx errors. Those hosts that it had tried were not added to the list
2531 of hosts for which the message was waiting, so if all were tried, there
2532 was no problem. Two fixes have been applied:
2534 (i) If there are any address or message errors in an SMTP delivery, none
2535 of the hosts (tried or untried) are now added to the list of hosts
2536 for which the message is waiting, so the message should not be a
2537 candidate for sending over the same connection that was used for a
2538 successful delivery of some other message. This seems entirely
2539 reasonable: after all the message is NOT "waiting for some host".
2540 This is so "obvious" that I'm not sure why it wasn't done
2541 previously. Hope I haven't missed anything, but it can't do any
2542 harm, as the worst effect is to miss an optimization.
2544 (ii) If, despite (i), such a delivery is accidentally attempted, the
2545 routing retry time is respected, so at least it doesn't keep
2546 hammering the server.
2548 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2549 in ${readsocket because some servers need this prod.
2551 PH/32 Added some extra debug output when updating a wait-xxx database.
2553 PH/33 The hint "could be header name not terminated by colon", which has been
2554 given for certain expansion errors for a long time, was not being given
2555 for the ${if def:h_colon_omitted{... case.
2557 PH/34 The spec says: "With one important exception, whenever a domain list is
2558 being scanned, $domain contains the subject domain." There was at least
2559 one case where this was not true.
2561 PH/35 The error "getsockname() failed: connection reset by peer" was being
2562 written to the panic log as well as the main log, but it isn't really
2563 panic-worthy as it just means the connection died rather early on. I have
2564 removed the panic log writing for the ECONNRESET error when getsockname()
2567 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2568 runs only) independently of the message's sender address. This meant
2569 that, if the 4xx error was in fact related to the sender, a different
2570 message to the same recipient with a different sender could confuse
2571 things. In particular, this can happen when sending to a greylisting
2572 server, but other circumstances could also provoke similar problems.
2573 I have changed the default so that the retry time for these errors is now
2574 based a combination of the sender and recipient addresses. This change
2575 can be overridden by setting address_retry_include_sender=false in the
2578 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2579 remote server are returned as part of bounce messages. This was not
2580 happening for LMTP over a pipe (the lmtp transport), but now it is the
2581 same for both kinds of LMTP.
2583 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2584 in header lines that were in fact CNAMEs. This is no longer the case.
2586 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2587 and queue runs started by the daemon processed all messages. This has
2588 been fixed so that -R and -S can now usefully be given with -q<time>.
2590 PH/40 Import PCRE release 6.7 (fixes some bugs).
2592 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2594 PH/42 Give an error if -q is specified more than once.
2596 PH/43 Renamed the variables $interface_address and $interface_port as
2597 $received_ip_address and $received_port, to make it clear that these
2598 values apply to message reception, and not to the outgoing interface when
2599 a message is delivered. (The old names remain recognized, of course.)
2601 PH/44 There was no timeout on the connect() call when using a Unix domain
2602 socket in the ${readsocket expansion. There now is.
2604 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2605 be meaningful with "accept".
2607 SC/01 Eximstats V1.43
2608 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2610 SC/02 Eximstats V1.44
2611 Use a glob alias rather than an array ref in the generated
2612 parser. This improves both readability and performance.
2614 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2615 Collect SpamAssassin and rejection statistics.
2616 Don't display local sender or destination tables unless
2617 there is data to show.
2618 Added average volumes into the top table text output.
2620 SC/04 Eximstats V1.46
2621 Collect data on the number of addresses (recipients)
2622 as well as the number of messages.
2624 SC/05 Eximstats V1.47
2625 Added 'Message too big' to the list of mail rejection
2626 reasons (thanks to Marco Gaiarin).
2628 SC/06 Eximstats V1.48
2629 Mainlog lines which have GMT offsets and are too short to
2630 have a flag are now skipped.
2632 SC/07 Eximstats V1.49 (Alain Williams)
2633 Added the -emptyok flag.
2635 SC/08 Eximstats V1.50
2636 Fixes for obtaining the IP address from reject messages.
2638 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2639 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2640 whitespace changes from 4.64-PH/27
2642 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2645 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2646 are found, allow negative numbers in numeric criteria)
2648 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2650 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2651 to match changes made in 4.64-PH/43
2653 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2655 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2656 "domain" is actually an IP address, and force a failure. This locks out
2657 those revolvers/nameservers that support "A-for-A" lookups, in
2658 contravention of the specifications.
2660 PH/48 When a host name was looked up from an IP address, and the subsequent
2661 forward lookup of the name timed out, the host name was left in
2662 $sender_host_name, contrary to the specification.
2664 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2665 restricted to single-key lookups, Exim was not diagnosing an error if
2666 * or *@ was used with a query-style lookup.
2668 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2670 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2671 long ago, but noone interested enough thought of it. Let's just say that
2672 the "1.1" means that there are some new functions that weren't there at
2673 some point in the past.
2675 PH/51 Error processing for expansion failure of helo_data from an smtp
2676 transport during callout processing was broken.
2678 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2679 tested/used via the -bh/-bhc/-bs options.
2681 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2682 bug, fixed in subsequent PCRE releases).
2684 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2685 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2687 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2693 SC/01 Use a glob alias rather than an array ref in eximstats generated
2694 parser. This improves both readability and performance.
2696 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2697 Don't display local sender or destination tables in eximstats unless
2698 there is data to show.
2699 Added average volumes into the eximstats top table text output.
2701 SC/03 Collect data on the number of addresses (recipients) as well
2702 as the number of messages in eximstats.
2704 TF/01 Correct an error in the documentation for the redirect router. Exim
2705 does (usually) call initgroups() when daemonizing.
2707 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2708 with consistent privilege compared to when running as a daemon.
2710 TF/03 Note in the spec that $authenticated_id is not set for local
2711 submissions from trusted users.
2713 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2714 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2716 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2717 by adding some example configuration directives to the default
2718 configuration file. A little bit of work is required to uncomment the
2719 directives and define how usernames and passwords are checked, but
2720 there is now a framework to start from.
2722 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2723 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2724 without this. I don't know how relevant this is to other LDAP libraries.
2726 PH/02 Add the verb name to the "unknown ACL verb" error.
2728 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2730 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2732 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2733 directory not expanded when it should be if an expanded home directory
2734 was set for the address (which is overridden by the transport).
2736 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2739 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2740 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2741 because it is too late at that time, and has no effect.
2743 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2744 security issue with \' (bugzilla #107). I could not use the
2745 PQescapeStringConn() function, because it needs a PGconn value as one of
2748 PH/08 When testing addresses using -bt, indicate those final addresses that
2749 are duplicates that would not cause an additional delivery. At least one
2750 person was confused, thinking that -bt output corresponded to deliveries.
2751 (Suppressing duplicates isn't a good idea as you lose the information
2752 about possibly different redirections that led to the duplicates.)
2754 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2755 systems where poll() doesn't work, in particular OS X.
2757 PH/10 Added more information to debugging output for retry time not reached.
2759 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2760 operations in malware.c.
2762 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2765 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2766 syslog_duplication set false, log lines that would normally be written
2767 both the the main log and to the reject log were not written to syslog at
2770 PH/14 In the default configuration, change the use of "message" in ACL warn
2771 statements to "add_header".
2773 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2774 not followed by a command (e.g. "seen endif").
2776 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2777 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2780 PH/17 Added extra conditions to the default value of delay_warning_condition
2784 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2785 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2786 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2789 The Auto-Submitted: and various List- headers are standardised, whereas I
2790 don't think Precedence: ever was.
2792 PH/18 Refactored debugging code in route_finduser() to show more information,
2793 in particular, the error code if getpwnam() issues one.
2795 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2796 This is apparently needed in addition to the PH/07 change above to avoid
2797 any possible encoding problems.
2799 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2800 but not after initializing Perl.
2802 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2803 output them only if debugging. By default they are written stderr,
2804 apparently, which is not desirable.
2806 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2809 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2812 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2814 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2815 authenticated or an ident call has been made. Suppress the default
2816 values for $authenticated_id and $authenticated_sender (but permit -oMai
2817 and -oMas) when testing with -bh.
2819 PH/24 Re-jigged the order of the tests in the default configuration so that the
2820 tests for valid domains and recipients precede the DNS black list and CSA
2821 tests, on the grounds that those ones are more expensive.
2823 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2824 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2825 This bug exists in every version of Exim that I still have, right back to
2828 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2829 However, an attempt to turn on case-sensitivity in a regex key by
2830 including (?-i) didn't work because the subject string was already
2831 lowercased, and the effects were non-intuitive. It turns out that a
2832 one-line patch can be used to allow (?-i) to work as expected.
2838 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2839 other effects) broke the use of negated acl sub-conditions.
2841 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2844 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2845 "Deny" causes Exim to reject the incoming connection with a 554 error.
2846 Unfortunately, if there is a major crisis, such as a disk failure,
2847 tcp-wrappers gives "deny", whereas what one would like would be some
2848 kind of temporary error. A kludge has been added to help with this.
2849 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2850 554 error is used if errno is still zero or contains ENOENT (which occurs
2851 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2854 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2856 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2857 errors. Otherwise a message that provokes a temporary error (when other
2858 messages do not) can cause a whole host to time out.
2860 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2861 addresses were routed directly to files or pipes from a redirect router.
2862 File deliveries just didn't batch; pipe deliveries might have suffered
2865 PH/06 A failure to get a lock for a hints database would erroneously always say
2866 "Failed to get write lock", even when it was really a read lock.
2868 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2869 of 0600. This has been changed to use the value of the lockfile_mode
2870 option (which defaults to 0600).
2872 PH/08 Applied small patch from the Sieve maintainer.
2874 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2875 folder from quota calculations, a direct delivery into this folder messed
2876 up the contents of the maildirsize file. This was because the regex was
2877 used only to exclude .Trash (or whatever) when the size of the mailbox
2878 was calculated. There was no check that a delivery was happening into an
2879 excluded directory. This bug has been fixed by ignoring all quota
2880 processing for deliveries into excluded directories.
2882 PH/10 Added the maildirfolder_create_regex option to appendfile.
2888 PH/01 The code for finding all the local interface addresses on a FreeBSD
2889 system running IPv6 was broken. This may well have applied to all BSD
2890 systems, as well as to others that have similar system calls. The broken
2891 code found IPv4 interfaces correctly, but gave incorrect values for the
2892 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2893 that it would not match correctly against @[] and not recognize the IPv6
2896 PH/02 The ipliteral router was not recognizing addresses of the form user@
2897 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2899 PH/03 Added disable_ipv6.
2901 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2902 decoded form, because it is most often used to construct To: headers
2903 lines in autoreplies, and the decoded form may well be syntactically
2904 invalid. However, $reply_address has leading white space removed, and all
2905 newlines turned into spaces so that the autoreply transport does not
2908 PH/05 If group was specified without a user on a router, and no group or user
2909 was specified on a transport, the group from the router was ignored.
2911 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2912 for visible compile-time settings that can be used to change these
2913 numbers, for those that want even more. Backwards compatibility with old
2914 spool files has been maintained. However, going back to a previous Exim
2915 release will lost any variables that are in spool files.
2917 PH/07 Two small changes when running in the test harness: increase delay when
2918 passing a TCP/IP connection to a new process, in case the original
2919 process has to generate a bounce, and remove special handling of
2920 127.0.0.2 (sic), which is no longer necessary.
2922 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2923 be the same on different OS.
2925 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2928 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2929 whether --show-vars was specified or not
2931 JJ/02 exipick: Added support for new ACL variable spool format introduced
2934 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2935 syntactically invalid From: or Reply-to: line, and a filter used this to
2936 generate an autoreply, and therefore failed to obtain an address for the
2937 autoreply, Exim could try to deliver to a non-existent relative file
2938 name, causing unrelated and misleading errors. What now happens is that
2939 it logs this as a hard delivery error, but does not attempt to create a
2942 PH/11 The exinext utility has a -C option for testing purposes, but although
2943 the given file was scanned by exinext itself; it wasn't being passed on
2944 when Exim was called.
2946 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2947 an end-of-file indication when reading a command response.
2949 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2950 compiled. In many other places in Exim, IPv6 addresses are always
2951 recognized, so I have changed this. It also means that IPv4 domain
2952 literals of the form [IPV4:n.n.n.n] are now always recognized.
2954 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2955 used if the router is not running as root, for example, when verifying at
2956 ACL time, or when using -bh. The debugging output from this situation was
2957 non-existent - all you got was a failure to exec. I have made two
2960 (a) Failures to set uid/gid, the current directory, or a process leader
2961 in a subprocess such as that created by queryprogram now generate
2962 suitable debugging output when -d is set.
2964 (b) The queryprogram router detects when it is not running as root,
2965 outputs suitable debugging information if -d is set, and then runs
2966 the subprocess without attempting to change uid/gid.
2968 PH/15 Minor change to Makefile for building test_host (undocumented testing
2971 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2972 additional section of a DNS packet that returns MX or SRV records.
2973 Instead, it always explicitly searches for A/AAAA records. This avoids
2974 major problems that occur when a DNS server includes only records of one
2975 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2976 fixed another bug: if SRV records were looked up and the corresponding
2977 address records were *not* found in the additional section, the port
2978 values from the SRV records were lost.
2980 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2981 using the correct key (the original address) when searching the retry
2982 rules in order to find which one to use for generating the retry hint.
2984 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2985 adding the default one. Similarly, if it contains a Reply-To: header, the
2986 errors_reply_to option, if set, is not used.
2988 PH/19 When calculating a retry time, Exim used to measure the "time since
2989 failure" by looking at the "first failed" field in the retry record. Now
2990 it does not use this if it is later than than the arrival time of the
2991 message. Instead it uses the arrival time. This makes for better
2992 behaviour in cases where some deliveries succeed, thus re-setting the
2993 "first failed" field. An example is a quota failure for a huge message
2994 when small messages continue to be delivered. Without this change, the
2995 "time since failure" will always be short, possible causing more frequent
2996 delivery attempts for the huge message than are intended.
2997 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2999 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3000 $1, $2, $3) because the numerical variables can be reset during some
3001 expansion items (e.g. "match"), thereby losing the authentication data.
3003 PH/21 Make -bV show the size of off_t variables so that the test suite can
3004 decide whether to run tests for quotas > 2G.
3006 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3007 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3008 filecount value is greater than 2G or if a quota value is greater than 2G
3009 on a system where the size of off_t is not greater than 4, a panic error
3012 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3013 never match. The debug and -bh output now contains an explicit error
3014 message indicating a malformed IPv4 address or mask.
3016 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3017 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3018 PH/23 above applies.
3020 PH/25 Do not write to syslog when running in the test harness. The only
3021 occasion when this arises is a failure to open the main or panic logs
3022 (for which there is an explicit test).
3024 PH/26 Added the /no_tell option to "control=freeze".
3026 PH/27 If a host name lookup failed very early in a connection, for example, if
3027 the IP address matched host_lookup and the reverse lookup yielded a name
3028 that did not have a forward lookup, an error message of the form "no IP
3029 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3030 could be logged. Now it outputs the IP address instead of "NULL".
3032 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3033 allows the sender and the authenticated sender to be set when
3034 submitting a message from within Exim. Since child_open_exim() is
3035 documented for local_scan(), the new function should be too.
3037 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3038 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3039 results in an empty string is now treated as unset.
3041 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3043 PH/31 Added sender_verify_fail logging option.
3045 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3046 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3047 tidied the source and removed it altogether.
3049 PH/33 When a queue run was abandoned because the load average was too high, a
3050 log line was always written; now it is written only if the queue_run log
3051 selector is set. In addition, the log line for abandonment now contains
3052 information about the queue run such as the pid. This is always present
3053 in "start" and "stop" lines but was omitted from the "abandon" line.
3055 PH/34 Omit spaces between a header name and the colon in the error message that
3056 is given when verify = headers_syntax fails (if there are lots of them,
3057 the message gets confusing).
3059 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3060 names, as there are now some PTR records that contain slashes. This check
3061 is only to protect against broken name servers that fall over on strange
3062 characters, so the fact that it applies to all lookups doesn't matter.
3064 PH/36 Now that the new test suite is complete, we can remove some of the
3065 special code in Exim that was needed for the old test suite. For example,
3066 sorting DNS records because real resolvers return them in an arbitrary
3067 order. The new test suite's fake resolver always returns records in the
3070 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3071 bounces) except when queue_only is set, to avoid logging races between
3072 the different processes.
3074 PH/38 Panic-die if .include specifies a non-absolute path.
3076 PH/39 A tweak to the "H" retry rule from its user.
3078 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3079 a label. They prevented compilation on older perls.
3081 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3082 a warning to be raised on newish perls.
3084 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3085 on queue. Changes to match documented behaviour of showing count of
3086 messages matching specified criteria.
3088 PH/40 Changed the default ident timeout from 30s to 5s.
3090 PH/41 Added support for the use of login_cap features, on those BSD systems
3091 that have them, for controlling the resources used by pipe deliveries.
3093 PH/42 The content-scanning code uses fopen() to create files in which to put
3094 message data. Previously it was not paying any attention to the mode of
3095 the files. Exim runs with umask(0) because the rest of the code creates
3096 files with open(), and sets the required mode explicitly. Thus, these
3097 files were ending up world-writeable. This was not a big issue, because,
3098 being within the spool directory, they were not world-accessible. I have
3099 created a function called modefopen, which takes an additional mode
3100 argument. It sets umask(777), creates the file, chmods it to the required
3101 mode, then resets the umask. All the relevant calls to fopen() in the
3102 content scanning code have been changed to use this function.
3104 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3105 to 24 hours. This avoids potential overflow problems when processing G
3106 and H retry rules. I suspect nobody ever tinkers with this value.
3108 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3110 PH/45 When the plaintext authenticator is running as a client, the server's
3111 challenges are checked to ensure they are valid base64 strings. By
3112 default, the authentication attempt is cancelled if an invalid string is
3113 received. Setting client_ignore_invalid_base64 true ignores these errors.
3114 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3115 they are received. Thus, the responses can be made to depend on the
3116 challenges. If an invalid string is ignored, an empty string is placed in
3119 PH/46 Messages that are created by the autoreply transport now contains a
3120 References: header, in accordance with RFCs 2822 and 3834.
3122 PH/47 Added authenticated_sender_force to the smtp transport.
3124 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3126 PH/49 Installed latest patch from the Sieve maintainer.
3128 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3129 was also set, the appendfile transport was unnecessarily scanning a
3130 directory of message files (e.g. for maildir delivery) to find the count
3131 of files (along with the size), even though it did not need this
3132 information. It now does the scan only if it needs to find either the
3133 size of the count of files.
3135 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3137 PH/52 Two bugs concerned with error handling when the smtp transport is
3140 (i) Exim was not creating retry information for temporary errors given
3141 for individual recipients after the DATA command when the smtp transport
3142 was used in LMTP mode. This meant that they could be retried too
3143 frequently, and not timed out correctly.
3145 (ii) Exim was setting the flag that allows error details to be returned
3146 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3147 recipients that were returned after the DATA command.
3149 PH/53 This is related to PH/52, but is more general: for any failing address,
3150 when detailed error information was permitted to be returned to the
3151 sender, but the error was temporary, then after the final timeout, only
3152 "retry timeout exceeded" was returned. Now it returns the full error as
3153 well as "retry timeout exceeded".
3155 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3156 do this, and (what is worse) MTAs that accept it.
3158 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3159 will now be deprecated.
3161 PH/56 New os.c-cygwin from the Cygwin maintainer.
3163 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3164 formats (previously only available in exim formats via -bpr, -bpru,
3165 and -bpra. Now also available in native and exiqgrep formats)
3167 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3168 with very large, slow to parse queues
3170 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3172 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3174 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3175 responses to authentication challenges, though it was showing the
3176 challenges; (ii) I've removed the CR characters from the debug output for
3179 PH/58 Allow for the insertion of a newline as well as a space when a string
3180 is turned into more than one encoded-word during RFC 2047 encoding. The
3181 Sieve code now uses this.
3183 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3184 data_4xx, lost_connection, tls_required.
3186 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3187 message was being sent as an SMTP response.
3189 PH/61 Add -l and -k options to exicyclog.
3191 PH/62 When verifying, if an address was redirected to one new address, so that
3192 verification continued, and the new address failed or deferred after
3193 having set something in $address_data, the value of $address_data was not
3194 passed back to the ACL. This was different to the case when no
3195 redirection occurred. The value is now passed back in both cases.
3197 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3198 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3199 use login_cap.h, so on its own it isn't the distinguishing feature. The
3200 new name refers directly to the setclassresources() function.
3202 PH/65 Added configuration files for NetBSD3.
3204 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3206 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3207 is preferred over IPv4.
3209 PH/68 The bounce_return_message and bounce_return_body options were not being
3210 honoured for bounces generated during the reception of non-SMTP messages.
3211 In particular, this applied to messages rejected by the ACL. This bug has
3212 been fixed. However, if bounce_return_message is true and bounce_return_
3213 body is false, the headers that are returned for a non-SMTP message
3214 include only those that have been read before the error was detected.
3215 (In the case of an ACL rejection, they have all been read.)
3217 PH/69 The HTML version of the specification is now built in a directory called
3218 spec_html instead of spec.html, because the latter looks like a path with
3219 a MIME-type, and this confuses some software.
3221 PH/70 Catch two compiler warnings in sieve.c.
3223 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3224 function verify_get_ident() calls ip_connect() to connect a socket, but
3225 if the "connect()" function timed out, ip_connect() used to close the
3226 socket. However, verify_get_ident() also closes the socket later, and in
3227 between Exim writes to the log, which may get opened at this point. When
3228 the socket was closed in ip_connect(), the log could get the same file
3229 descriptor number as the socket. This naturally causes chaos. The fix is
3230 not to close the socket in ip_connect(); the socket should be closed by
3231 the function that creates it. There was only one place in the code where
3232 this was missing, in the iplookup router, which I don't think anybody now
3233 uses, but I've fixed it anyway.
3235 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3236 well as to direct DNS lookups. Otherwise the handling of names in host
3237 lists is inconsistent and therefore confusing.
3243 PH/01 Two changes to the default runtime configuration:
3245 (1) Move the checks for relay_from_hosts and authenticated clients from
3246 after to before the (commented out) DNS black list checks.
3248 (2) Add control=submission to the relay_from_hosts and authenticated
3249 clients checks, on the grounds that messages accepted by these
3250 statements are most likely to be submissions.
3252 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3254 (1) Generate an error if the third argument for the ${prvs expansion is
3257 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3260 (3) Reset the variables that are obtained from the first argument of
3261 ${prvscheck and used in the second argument before leaving the code,
3262 because their memory is reclaimed, so using them afterwards may do
3265 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3266 one (it's much easier than Tom thought :-).
3268 (5) Because of (4), we can now allow for the use of $prvscheck_result
3269 inside the third argument.
3271 PH/03 For some reason, the default setting of PATH when running a command from
3272 a pipe transport was just "/usr/bin". I have changed it to
3275 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3276 anything to be listed in the output from -bV.
3278 PH/05 When a filter generated an autoreply, the entire To: header line was
3279 quoted in the delivery log line, like this:
3281 => >A.N.Other <ano@some.domain> <original@ddress> ...
3283 This has been changed so that it extracts the operative address. There
3284 may be more than one such address. If so, they are comma-separated, like
3287 => >ano@some.domain,ona@other.domain <original@ddress> ...
3289 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3290 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3291 not being looked up in the rDNS to get a host name, Exim was showing the
3292 IP address twice in Received: lines, even though the IP addresses were
3293 identical. For example:
3295 Received: from [1.2.3.4] (helo=[1.2.3.4])
3297 However, if the real host name was known, it was omitting the HELO data
3298 if it matched the actual IP address. This has been tidied up so that it
3299 doesn't show the same IP address twice.
3301 PH/07 When both +timestamp and +memory debugging was on, the value given by
3302 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3303 called by the debug printing, thereby overwriting the timestamp buffer.
3304 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3306 PH/08 When the original message was included in an autoreply transport, it
3307 always said "this is a copy of the message, including all the headers",
3308 even if body_only or headers_only was set. It now gives an appropriate
3311 PH/09 Applied a patch from the Sieve maintainer which:
3313 o fixes some comments
3314 o adds the (disabled) notify extension core
3315 o adds some debug output for the result of if/elsif tests
3316 o points to the current vacation draft in the documentation
3317 and documents the missing references header update
3321 o fixes a bug in processing the envelope test (when testing
3322 multiple envelope elements, the last element determined the
3325 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3326 Electronic Mail") by including:
3328 Auto-submitted: auto-generated
3330 in the messages that it generates (bounce messages and others, such as
3331 warnings). In the case of bounce messages for non-SMTP messages, there was
3332 also a typo: it was using "Auto_submitted" (underscore instead of
3333 hyphen). Since every message generated by Exim is necessarily in response
3334 to another message, thes have all been changed to:
3336 Auto-Submitted: auto-replied
3338 in accordance with these statements in the RFC:
3340 The auto-replied keyword:
3342 - SHOULD be used on messages sent in direct response to another
3343 message by an automatic process,
3345 - MUST NOT be used on manually-generated messages,
3347 - MAY be used on Delivery Status Notifications (DSNs) and Message
3348 Disposition Notifications (MDNs),
3350 - MUST NOT be used on messages generated by automatic or periodic
3351 processes, except for messages which are automatic responses to
3354 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3355 to the default Received: header definition.
3357 PH/12 Added log selector acl_warn_skipped (default on).
3359 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3360 variables because (a) they are in the wrong storage pool and (b) even if
3361 they were copied, it wouldn't work properly because of the caching.
3363 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3364 checking when decoding. Apparently there are clients that generate
3365 overlong encoded strings. Why am I not surprised?
3367 PH/15 If the first argument of "${if match_address" was not empty, but did not
3368 contain an "@" character, Exim crashed. Now it writes a panic log message
3369 and treats the condition as false.
3371 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3373 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3374 extension "envelope-auth". The code is finished and in agreement with
3375 other implementations, but there is no documentation so far and in fact,
3376 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3377 not changing the active code.
3379 Print executed "if" and "elsif" statements when debugging is used. This
3380 helps a great deal to understand what a filter does.
3382 Document more things not specified clearly in RFC3028. I had all this
3383 sorted out, when out of a sudden new issues came to my mind. Oops."
3385 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3388 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3389 canonical form (as documented). However, after a host name lookup from
3390 the IP address, check_host() was doing a simple string comparison with
3391 addresses acquired from the DNS when checking that the found name did
3392 have the original IP as one of its addresses. Since any found IPv6
3393 addresses are likely to be in abbreviated form, the comparison could
3394 fail. Luckily, there already exists a function for doing the comparison
3395 by converting both addresses to binary, so now that is used instead of
3396 the text comparison.
3398 PH/20 There was another similar case to PH/19, when a complete host name was
3399 given in a host list; looking up its IP address could give an abbreviated
3400 form, whereas the current host's name might or might not be abbreviated.
3401 The same fix has been applied.
3407 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3408 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3411 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3412 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3414 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3416 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3417 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3418 Also, for "Auto-Submitted", treat anything other than "no" as
3419 non-personal, in accordance with RFC 3834. (Previously it treated
3420 anything starting "auto-" as non-personal.)
3422 TF/01 The control=submission/name=... option had a problem with syntax
3423 errors if the name included a slash character. The /name= option
3424 now slurps the rest of the string, so it can include any characters
3425 but it must come last in the list of options (after /sender_retain
3428 PH/05 Some modifications to the interface to the fake nameserver for the new
3436 TK/01 Added the "success_on_redirect" address verification option. See
3437 NewStuff for rationale and an example.
3439 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3441 PH/02 Patch to exigrep to allow it to work on syslog lines.
3443 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3444 fread() to skip over the body file's header line, because in Cygwin the
3445 header line is locked and is inaccessible.
3447 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3448 co-exist for some time) to make it clear that it is the Exim ID that is
3449 referenced, not the Message-ID: header line.
3451 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3452 string_format() function, because snprintf() does not exist on all
3455 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3456 ${stat: expansion item.
3458 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3459 protocol synchronization error", to keep the pedants happy.
3461 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3462 well as for IRIX systems, when gcc is being used. See the host.c source
3465 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3467 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3470 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3471 transport and to the smtp transport in LMTP mode.
3473 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3475 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3476 run a filter in a subprocess. This could lead to confusion in subsequent
3477 lookups in the parent process. There should also be a search_tidyup() at
3478 the end of the subprocess.
3480 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3481 only if the host matched helo_try_verify_hosts, which caused the
3482 verification to occur when the EHLO/HELO command was issued. The ACL just
3483 tested the remembered result. Now, if a previous verification attempt has
3484 not happened, "verify = helo" does it there and then.
3486 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3488 TK/03 Fix log output including CR from clamd.
3490 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3491 exist provoked a memory error which could cause a segfault.
3493 PH/15 Installed PCRE 6.2
3495 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3497 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3498 of the problem. Specifically, suggested +O2 rather than +O1 for the
3501 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3503 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3504 record, the port was not correctly logged when the outgoing_port log
3505 selector was set (it logged the transort's default port).
3507 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3508 fallback_hosts, and "hosts" in the smtp transport.
3510 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3511 host errors such as "Connection refused".
3513 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3514 authentication with radiusclient 0.4.9:
3516 - Error returned from rc_read_config was caught wrongly
3517 - Username/password not passed on to radius server due to wrong length.
3519 The presumption is that some radiusclient API changes for 4.51/PH/17
3520 were not taken care of correctly. The code is still untested by me (my
3521 Linux distribution still has 0.3.2 of radiusclient), but it was
3522 contributed by a Radius user.
3524 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3525 expanding the "port" option of the smtp transport.
3527 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3528 while reading a MIME header. Thanks to Tom Hughes for a patch.
3530 PH/24 Include config.h inside local_scan.h so that configuration settings are
3533 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3534 that in an ACL for RCPT (for example), you can examine exactly what was
3537 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3538 commands, but it was not correctly comparing the address with the actual
3539 client host address. Thus, it would show the EHLO address in Received:
3540 header lines when this was not necessary.
3542 PH/27 Added the % operator to ${eval:}.
3544 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3545 it should be ignoring failures (because with -C, for example, it has lost
3546 privilege). It wasn't ignoring creation failures other than "already
3549 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3552 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3553 because an input line was too long, either on its own, or by virtue of
3554 too many continuations, the temporary file was not being removed, and the
3555 return code was incorrect.
3557 PH/31 Missing "BOOL" in function definition in filtertest.c.
3559 PH/32 Applied Sieve patches from the maintainer.
3561 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3563 PH/33 Added "verify = not_blind".
3565 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3566 Local/Makefile (with some defaults set). These are used in built scripts
3567 such as exicyclog, but they have never been used in the exim_install
3568 script (though there are many overriding facilities there). I have
3569 arranged that the exim_install script now takes note of these two
3572 PH/35 Installed configuration files for Dragonfly.
3574 PH/36 When a locally submitted message by a trusted user did not contain a
3575 From: header, and the sender address was obtained from -f or from an SMTP
3576 MAIL command, and the trusted user did not use -F to supply a sender
3577 name, $originator_name was incorrectly used when constructing a From:
3578 header. Furthermore, $originator_name was used for submission mode
3579 messages from external hosts without From: headers in a similar way,
3580 which is clearly wrong.
3582 PH/37 Added control=suppress_local_fixups.
3584 PH/38 When log_selector = +received_sender was set, and the addition of the
3585 sender made the log line's construction buffer exactly full, or one byte
3586 less than full, an overflow happened when the terminating "\n" was
3589 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3590 when the result of a list match is failure because a DNS lookup failed.
3592 PH/40 RM_COMMAND is now used in the building process.
3594 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3595 the "build-* directories that it finds.
3597 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3598 address in a domain literal was a prefix of an interface address.
3600 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3601 when verifying a sender address, unless rewrite_headers is false.
3603 PH/44 Wrote a long comment about why errors_to addresses are verified as
3604 recipients, not senders.
3606 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3607 the ratelimit ACL was added.
3609 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3611 PH/46 Added extra information about PostgreSQL errors to the error string.
3613 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3614 avoiding the need to install special zones in a real server. This is
3615 backwards compatible; if it can't find the fake resolver, it drops back.
3616 Thus, both old and new test suites can be run.
3618 TF/02 Added util/ratelimit.pl
3620 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3621 clock is set back in time.
3623 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3624 Candler <B.Candler@pobox.com>.
3626 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3627 OK for addresses that are the result of redirections.
3629 PH/48 A number of further additions for the benefit of the new test suite,
3630 including a fake gethostbyname() that interfaces to the fake DNS resolver
3633 TF/06 The fix for widen_domains has also been applied to qualify_single and
3634 search_parents which are the other dnslookup options that can cause
3637 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3640 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3642 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3643 service" if it encountered an MX record with an empty target hostname.
3644 The message is now "an MX or SRV record indicated no SMTP service".
3646 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3647 if the DNS of the sending site is misconfigured. This is quite a
3648 common situation. This change restores the behaviour of treating a
3649 helo verification defer as a failure.
3651 PH/51 If self=fail was set on a router, the bounce message did not include the
3652 actual error message.
3658 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3660 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3661 command itself ended in error, the underlying message about the transport
3662 filter timeout was being overwritten with the pipe command error. Now the
3663 underlying error message should be appended to the second error message.
3665 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3667 PH/02 Reduce the amount of output that "make" produces by default. Full output
3668 can still be requested.
3670 PH/03 The warning log line about a condition test deferring for a "warn" verb
3671 was being output only once per connection, rather than after each
3672 occurrence (because it was using the same function as for successful
3673 "warn" verbs). This seems wrong, so I have changed it.
3675 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3676 it should not have, which might have caused a crash in the right
3677 circumstances, but probably never did.
3679 PH/04 Installed a modified version of Tony Finch's patch to make submission
3680 mode fix the return path as well as the Sender: header line, and to
3681 add a /name= option so that you can make the user's friendly name appear
3684 TF/03 Added the control = fakedefer ACL modifier.
3686 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3687 Mark Lowes for thorough testing.
3689 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3691 TK/03 Merged latest SRS patch from Miles Wilton.
3693 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3694 with the definition in sysexits.h (which is #included earlier).
3695 Fortunately, Exim does not actually use EX_OK. The code used to try to
3696 preserve the sysexits.h value, by assuming that macro definitions were
3697 scanned for macro replacements. I have been disabused of this notion,
3698 so now the code just undefines EX_OK before #including unistd.h.
3700 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3701 in the smtp transport. When a block could not be written in a single
3702 write() function, the timeout was being re-applied to each part-write.
3703 This seems wrong - if the receiver was accepting one byte at a time it
3704 would take for ever. The timeout is now adjusted when this happens. It
3705 doesn't have to be particularly precise.
3707 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3708 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3710 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3711 without a domain if the check to <postmaster@domain> fails.
3713 SC/01 Eximstats: added -xls and the ability to specify output files
3714 (patch written by Frank Heydlauf).
3716 SC/02 Eximstats: use FileHandles for outputting results.
3718 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3720 SC/04 Eximstats: fixed display of large numbers with -nvr option
3722 SC/05 Eximstats: fixed merging of reports with empty tables.
3724 SC/06 Eximstats: added the -include_original_destination flag
3726 SC/07 Eximstats: removed tabs and trailing whitespace.
3728 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3730 TK/06 MBOX spool code: Add real "From " MBOX separator line
3731 so the .eml file is really in mbox format (even though
3732 most programs do not really care). Patch from Alex Miller.
3734 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3735 The latter is generated from $received_to and is only set if the
3736 message has one envelope recipient. SA can use these headers,
3737 obviously out-of-the-box. Patch from Alex Miller.
3739 PH/08 The ${def test on a variable was returning false if the variable's
3740 value was "0", contrary to what the specification has always said!
3741 The result should be true unless the variable is empty.
3743 PH/09 The syntax error of a character other than { following "${if
3744 def:variable_name" (after optional whitespace) was not being diagnosed.
3745 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3746 accidental colon was present, for example, could give incorrect results.
3748 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3749 result is used (not including appendfile, where other changes are about
3752 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3753 This involved changing a lot of size variables from int to off_t. It
3754 should work with maildirs and everything.
3756 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3757 spamd dying while we are connected to it.
3759 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3762 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3763 function for BDB 4.3.
3765 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3767 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3768 the sources for PCRE have been re-arranged and more files are now
3771 PH/15 The code I had for printing potentially long long variables in PH/11
3772 above was not the best (it lost precision). The length of off_t variables
3773 is now inspected at build time, and an appropriate printing format (%ld
3774 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3775 to be "long long int" or "long int". This is needed for the internal
3776 formatting function string_vformat().
3778 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3779 the configuration file to be ":syslog", then the script "guesses" where
3780 the logs files are, rather than using the compiled in default. In our
3781 case the guess is not the same as the compiled default, so the script
3782 suddenly stopped working when I started to use syslog. The patch checks
3783 to see if log_file_path is "". If so, it attempts to read it from exim
3784 with no configuration file to get the compiled in version, before it
3785 falls back to the previous guessing code."
3787 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3788 implementing BATV in an Exim configuration. See NewStuff for the gory
3791 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3792 Makefile that are specific to HP-UX.
3794 PH/18 If the "use_postmaster" option was set for a recipient callout together
3795 with the "random" option, the postmaster address was used as the MAIL
3796 FROM address for the random test, but not for the subsequent recipient
3797 test. It is now used for both.
3799 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3800 patch removes a few documentation additions to RFC 3028, because the
3801 latest draft now contains them. It adds the new en;ascii-case comparator
3802 and a new error check for 8bit text in MIME parts. Comparator and
3803 require names are now matched exactly. I enabled the subaddress
3804 extension, but it is not well tested yet (read: it works for me)."
3806 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3807 rework some of the code of TK/09 above to avoid the hardwired use of
3808 "%lld" and "long long". Replaced the call to snprintf() with a call to
3811 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3812 records point to non-existent hosts", "retry timeout exceeded", and
3813 "retry time not reached for any host after a long failure period".
3815 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3816 experimental DomainKeys support:
3818 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3819 (2) On an error such as an illegally used "control", the wrong name for
3820 the control was given.
3822 These problems did NOT occur unless DomainKeys support was compiled.
3824 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3826 PH/24 Added ${if match_ip condition.
3828 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3829 databases so that it will be absolutely obvious if a crash occurs in the
3830 DB library. This is a regular occurrence (often caused by mis-matched
3833 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3834 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3835 picked up on a user's system that detects such things. There doesn't seem
3836 to be a gcc warning option for this - only an attribute that has to be
3837 put on the function's prototype. It seems that in Fedora Core 4 they have
3838 set this on a number of new functions. No doubt there will be more in due
3841 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3842 specify a transport. However, if an address that was verified by such a
3843 router was the subject of a callout, Exim crashed because it tried to
3844 read the rcpt_include_affixes from the non-existent transport. Now it
3845 just assumes that the setting of that option is false. This bug was
3846 introduced by 4.51/PH/31.
3848 PH/28 Changed -d+all to exclude +memory, because that information is very
3849 rarely of interest, but it makes the output a lot bigger. People tend to
3850 do -d+all out of habit.
3852 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3853 code in os-type was giving problems when libc.so lives in lib64, like on
3856 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3857 aren't the modern standard, and it seems that some systems' include files
3858 don't always have them. Exim was already checking for some of the newer
3859 ones like T_AAAA, and defining it itself. I've added checks for all the
3860 record types that Exim uses.
3862 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3863 not automatically generating a new one, as it is supposed to. This
3864 prevented TLS from working. If the file did exist, but contained invalid
3865 data, a new version was generated, as expected. It was only the case of a
3866 non-existent file that was broken.
3868 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3869 with a change in libdomainkeys > 0.64.
3871 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3872 from DNS. If the selector record carries the flag, it now has
3873 precedence over the domain-wide flag.
3875 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3877 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3878 the use of a port name that isn't defined in /etc/services) occurred, the
3879 message was deferred as in a normal delivery, and thus remained on the
3880 spool, instead of being failed because of the mua_wrapper setting. This
3881 is now fixed, and I tidied up some of the mua_wrapper messages at the
3884 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3885 the messages in a hash of arrays rather than using individual hashes.
3886 This is a bit cleaner and results in dramatic memory savings, albeit
3887 at a slight CPU cost.
3889 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3890 as requested by Marc Sherman.
3892 SC/10 Eximstats: added histograms for user specified patterns as requested
3895 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3897 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3898 fopen() in the content-scanning modules that did not already have it.
3904 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3905 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3907 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3909 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3911 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3912 to test Sieve filters that use "vacation".
3914 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3915 that changes the way the GnuTLS parameters are stored in the cache file.
3916 The new format can be generated externally. For backward compatibility,
3917 if the data in the cache doesn't make sense, Exim assumes it has read an
3918 old-format file, and it generates new data and writes a new file. This
3919 means that you can't go back to an older release without removing the
3922 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3923 work if there are any delivery delays because "one_time" forces the
3924 parent to be marked "delivered", so its unseen clone is never tried
3925 again. For this reason, Exim now forbids the simultaneous setting of
3928 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3929 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3930 entry if you want to know the details. The fix, however, neglected to
3931 consider the case when local delivery batching is involved. The test for
3932 "previously delivered" was not happening when checking to see if an
3933 address could be batched with a previous (undelivered) one; under
3934 certain circumstances this could lead to multiple deliveries to the same
3937 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3938 in its include files, and this causes problems building Exim.
3940 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3941 header_syntax) but Exim was just ignoring anything given after a slash.
3942 In particular, this caused confusion with an attempt to use "verify =
3943 reverse_host_lookup/defer_ok". An error is now given when options are
3944 supplied for verify items that do not have them. (Maybe reverse_host_
3945 lookup should have a defer_ok option, but that's a different point.)
3947 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3948 defined by RFC 821) to 2048, because there were problems with some AUTH
3949 commands, and RFC 1869 says the size should be increased for extended
3950 SMTP commands that take arguments.
3952 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3955 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3956 "unknown" error; now it says that the functionality isn't in the binary.
3958 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3959 an address' error message when a string expansion fails (syntax or
3960 whatever). Otherwise the password may appear in the log. Following change
3961 PH/42 below, there is no longer a chance of it appearing in a bounce
3964 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3966 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3967 of its addresses was ever tried. (Bugzilla bug #2.)
3969 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3970 the result incorrectly in the debug output. (It correctly added a newline
3971 to what was transported.)
3973 TF/01 Added $received_time.
3975 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3976 commented out examples of how to interface to a virus scanner and to
3977 SpamAssassin. Also added commented examples of av_scanner and
3978 spamd_address settings.
3980 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3981 and controls are allowed in which ACLs. There were a couple of minor
3982 errors. Some of the entries in the conditions table (which is a table of
3983 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3984 negation of where the condition IS allowed.
3986 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3988 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3989 header file does not have a version number, so I've had to invent a new
3990 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3991 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3992 radiusclient), but it was contributed by a Radius user.
3994 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3995 files or directories, for OpenSSL.
3997 PH/19 When an Exim process that is running as root has to create an Exim log
3998 file, it does so in a subprocess that runs as exim:exim so as to get the
3999 ownership right at creation (otherwise, other Exim processes might see
4000 the file with the wrong ownership). There was no test for failure of this
4001 fork() call, which would lead to the process getting stuck as it waited
4002 for a non-existent subprocess. Forks do occasionally fail when resources
4003 run out. I reviewed all the other calls to fork(); they all seem to check
4006 PH/20 When checking for unexpected SMTP input at connect time (before writing
4007 the banner), Exim was not dealing correctly with a non-positive return
4008 from the read() function. If the client had disconnected by this time,
4009 the result was a log entry for a synchronization error with an empty
4010 string after "input=" when read() returned zero. If read() returned -1
4011 (an event I could not check), uninitialized data bytes were printed.
4012 There were reports of junk text (parts of files, etc) appearing after
4015 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4017 PH/22 Added support for macro redefinition, and (re)definition in between
4018 driver and ACL definitions.
4020 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4021 forgetting to use the resulting value; it was using the unexpanded value.
4023 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4024 hadn't been configured. The fix is from Juergen Kreileder, who
4025 understands it better than I do:
4027 "Here's what I see happening with three configured cyrus_sasl
4028 authenticators configured (plain, login, cram-md5):
4030 On startup auth_cyrus_sasl_init() gets called for each of these.
4031 This means three calls to sasl_listmech() without a specified mech_list.
4032 => SASL tests which mechs of all available mechs actually work
4033 => three warnings about OTP not working
4034 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4036 With the patch, sasl_listmech() also gets called three times. But now
4037 SASL's mech_list option is set to the server_mech specified in the the
4038 authenticator. Or in other words, the answer from sasl_listmech()
4039 gets limited to just the mech you're testing for (which is different
4041 => the return list contains just 'plain' or 'login', 'cram-md5' or
4042 nothing depending on the value of ob->server_mech.
4044 I've just tested the patch: Authentication still works fine,
4045 unavailable mechs specified in the exim configuration are still
4046 caught, and the auth.log warnings about OTP are gone."
4048 PH/25 When debugging is enabled, the contents of the command line are added
4049 to the debugging output, even when log_selector=+arguments is not
4052 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4053 answer is "GNU", and only if the return is "GNU/something" is the answer
4056 PH/27 $acl_verify_message is now set immediately after the failure of a
4057 verification in an ACL, and so is available in subsequent modifiers. In
4058 particular, the message can be preserved by coding like this:
4060 warn !verify = sender
4061 set acl_m0 = $acl_verify_message
4063 Previously, $acl_verify_message was set only while expanding "message"
4064 and "log_message" when a very denied access.
4066 PH/28 Modified OS/os.c-Linux with
4068 -#ifndef OS_LOAD_AVERAGE
4069 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4071 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4072 nomenclature these days.)
4074 PH/29 Installed patch from the Sieve maintainer that adds the options
4075 sieve_useraddress and sieve_subaddress to the redirect router.
4077 PH/30 In these circumstances:
4078 . Two addresses routed to the same list of hosts;
4079 . First host does not offer TLS;
4080 . First host accepts first address;
4081 . First host gives temporary error to second address;
4082 . Second host offers TLS and a TLS session is established;
4083 . Second host accepts second address.
4084 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4085 and peerdn, if requested) that were in fact used only for the second
4088 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4089 attention to any local part prefix or suffix that was matched by the
4090 router that accepted the address. It now behaves in the same way as it
4091 does for delivery: the affixes are removed from the local part unless
4092 rcpt_include_affixes is set on the transport.
4094 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4095 timeout during the DATA phase of an incoming message.
4097 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4098 applied a patch sanctioned by the Sieve maintainer.
4100 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4101 the uid or gid is negative. A case of a negative gid caused this to be
4102 noticed. The fix allows for either to be negative.
4104 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4105 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4108 PH/36 The change PH/12 above was broken. Fixed it.
4110 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4111 the grounds that routing the same address twice would always produce the
4112 same answer. This might have been true once, but it is certainly no
4113 longer true now. Routing a child address may depend on the previous
4114 routing that produced that child. Some complicated redirection strategies
4115 went wrong when messages had multiple recipients, and made Exim's
4116 behaviour dependent on the order in which the addresses were given.
4118 I have moved the duplicate checking until after the routing is complete.
4119 Exim scans the addresses that are assigned to local and remote
4120 transports, and removes any duplicates. This means that more work will be
4121 done, as duplicates will always all be routed, but duplicates are
4122 presumably rare, so I don't expect this is of any significance.
4124 For deliveries to pipes, files, and autoreplies, the duplicate checking
4125 still happens during the routing process, since they are not going to be
4128 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4129 It corrects a timeout issue with spamd. This is Ian's comment: "The
4130 background is that sometimes spamd either never reads data from a
4131 connection it has accepted, or it never writes response data. The exiscan
4132 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4133 blindly assumes that writes won't block so it may never time out."
4135 PH/39 Allow G after quota size as well as K and M.
4137 PH/40 The value set for $authenticated_id in an authenticator may not contain
4138 binary zeroes or newlines because the value is written to log lines and
4139 to spool files. There was no check on this. Now the value is run through
4140 the string_printing() function so that such characters are converted to
4141 printable escape sequences.
4143 PH/41 $message_linecount is a new variable that contains the total number of
4144 lines in the message. Compare $body_linecount, which is the count for the
4147 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4148 bounce and delay warning messages, except in certain special cases, which
4151 (a) An SMTP error message from a remote host;
4152 (b) A message specified in a :fail: redirection;
4153 (c) A message specified in a "fail" command in a system filter;
4154 (d) A message specified in a FAIL return from the queryprogram router;
4155 (e) A message specified by the cannot_route_message router option.
4157 In these cases only, Exim does include the error details in bounce and
4158 warning messages. There are also a few cases where bland messages such
4159 as "unrouteable address" or "local delivery error" are given.
4161 PH/43 $value is now also set for the "else" part of a ${run expansion.
4163 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4164 being worked on, but at least Exim now implements the latest version to
4167 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4168 process to complete was treated as a delivery failure, a timeout while
4169 writing the message to the pipe was logged, but erroneously treated as a
4170 successful delivery. Such timeouts include transport filter timeouts. For
4171 consistency with the overall process timeout, these timeouts are now
4172 treated as errors, giving rise to delivery failures by default. However,
4173 there is now a new Boolean option for the pipe transport called
4174 timeout_defer, which, if set TRUE, converts the failures into defers for
4175 both kinds of timeout. A transport filter timeout is now identified in
4178 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4179 systems where "make" and "gmake" are different, calling "gmake" at top
4180 level broke things. I've arranged for the value of $(MAKE) to be passed
4181 from the Makefile to this script so that it can call the same version of
4185 A note about Exim versions 4.44 and 4.50
4186 ----------------------------------------
4188 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4189 changes of various kinds. As a consequence, a big documentation update was
4190 needed. This delayed the release for rather longer than seemed good, especially
4191 in the light of a couple of (minor) security issues. Therefore, the changes
4192 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4193 release. So 4.44 and 4.50 are in effect two different branches that both start
4196 I have left the 4.50 change log unchanged; it contains all the changes since
4197 4.43. The change log for 4.44 is below; many of its items are identical to
4198 those for 4.50. This seems to be the most sensible way to preserve the
4199 historical information.
4205 1. Minor wording change to the doc/README.SIEVE file.
4207 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4208 computation of the current number of files was incorrect.
4210 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4211 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4214 4. Give more explanation in the error message when the command for a transport
4215 filter fails to execute.
4217 5. There are several places where Exim runs a non-Exim command in a
4218 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4219 was being done only for the command run by the queryprogram router. It is
4220 now done for all such subprocesses. The other cases are: ${run, transport
4221 filters, and the commands run by the lmtp and pipe transports.
4223 6. Added CONFIGURE_GROUP build-time option.
4225 7. Some older OS have a limit of 256 on the maximum number of file
4226 descriptors. Exim was using setrlimit() to set 1000 as a large value
4227 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4228 systems. I've change it so that if it can't get 1000, it tries for 256.
4230 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4231 was an oversight, and furthermore, ever since the addition of extra
4232 controls (e.g. 4.43/32), the checks on when to allow different forms of
4233 "control" were broken. There should now be diagnostics for all cases when a
4234 control that does not make sense is encountered.
4236 9. Added the /retain_sender option to "control=submission".
4238 10. $recipients is now available in the predata ACL (oversight).
4240 11. Tidy the search cache before the fork to do a delivery from a message
4241 received from the command line. Otherwise the child will trigger a lookup
4242 failure and thereby defer the delivery if it tries to use (for example) a
4243 cached ldap connection that the parent has called unbind on.
4245 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4246 of $address_data from the recipient verification was clobbered by the
4247 sender verification.
4249 13. The value of address_data from a sender verification is now available in
4250 $sender_address_data in subsequent conditions in the ACL statement.
4252 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4254 15. Added a new option "connect=<time>" to callout options, to set a different
4257 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4258 was its contents. (It was OK if the option was not defined at all.)
4260 17. A "Completed" log line is now written for messages that are removed from
4261 the spool by the -Mrm option.
4263 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4264 information about exactly what failed.
4266 19. Added -dd to debug only the daemon process.
4268 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4269 handles timeouts, both on the server side and network timeouts. Renamed the
4270 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4272 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4273 It is now set to "smtps".
4275 22. $host_address is now set to the target address during the checking of
4276 ignore_target_hosts.
4278 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4279 being passed; this would have caused $sender_host_name to have been used if
4280 matching the list had actually called for a host name (not very likely,
4281 since this list is usually IP addresses). A host name is now passed as
4284 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4285 code that specifies a non-restarting handler (typically sigaction() in
4286 modern systems) in an attempt to fix a rare and obscure crash bug.
4288 25. Narrowed the window for a race in the daemon that could cause it to ignore
4289 SIGCHLD signals. This is not a major problem, because they are used only to
4290 wake it up if nothing else does.
4292 26. A malformed maildirsize file could cause Exim to calculate negative values
4293 for the mailbox size or file count. Odd effects could occur as a result.
4294 The maildirsize information is now recalculated if the size or filecount
4297 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4298 support for a long time. Removed HAVE_SYS_VFS_H.
4300 28. Installed the latest version of exipick from John Jetmore.
4302 29. In an address list, if the pattern was not a regular expression, an empty
4303 subject address (from a bounce message) matched only if the pattern was an
4304 empty string. Non-empty patterns were not even tested. This was the wrong
4305 because it is perfectly reasonable to use an empty address as part of a
4306 database query. An empty address is now tested by patterns that are
4307 lookups. However, all the other forms of pattern expect the subject to
4308 contain a local part and a domain, and therefore, for them, an empty
4309 address still always fails if the pattern is not itself empty.
4311 30. Exim went into a mad DNS loop when attempting to do a callout where the
4312 host was specified on an smtp transport, and looking it up yielded more
4313 than one IP address.
4315 31. Re-factored the code for checking spool and log partition space into a
4316 function that finds that data and another that does the check. The former
4317 is then used to implement four new variables: $spool_space, $log_space,
4318 $spool_inodes, and $log_inodes.
4320 32. The RFC2047 encoding function was originally intended for short strings
4321 such as real names; it was not keeping to the 75-character limit for
4322 encoded words that the RFC imposes. It now respects the limit, and
4323 generates multiple encoded words if necessary. To be on the safe side, I
4324 have increased the buffer size for the ${rfc2047: expansion operator from
4327 33. It is now permitted to omit both strings after an "if" condition; if the
4328 condition is true, the result is "true". As before, when the second string
4329 is omitted, a false condition yields an empty string. This makes it less
4330 cumbersome to write custom ACL and router conditions.
4332 34. Failure to deliver a bounce message always caused it to be frozen, even if
4333 there was an errors_to setting on the router. The errors_to setting is now
4336 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4337 canonical form (fully expanded) before being placed in
4338 $sender_host_address.
4340 36. The table in the code that translates DNS record types into text (T_A to
4341 "A" for instance) was missing entries for NS and CNAME. It is just possible
4342 that this could have caused confusion if both these types were looked up
4343 for the same domain, because the text type is used as part of Exim's
4344 per-process caching. But the chance of anyone hitting this buglet seems
4347 37. The dnsdb lookup has been extended in a number of ways.
4349 (1) There is a new type, "zns", which walks up the domain tree until it
4350 finds some nameserver records. It should be used with care.
4352 (2) There is a new type, "mxh", which is like "mx" except that it returns
4353 just the host names, not the priorities.
4355 (3) It is now possible to give a list of domains (or IP addresses) to be
4356 looked up. The behaviour when one of the lookups defers can be
4357 controlled by a keyword.
4359 (4) It is now possible to specify the separator character for use when
4360 multiple records are returned.
4362 38. The dnslists ACL condition has been extended: it is now possible to supply
4363 a list of IP addresses and/or domains to be looked up in a particular DNS
4366 39. Added log_selector=+queue_time_overall.
4368 40. When running the queue in the test harness, wait just a tad after forking a
4369 delivery process, to get repeatability of debugging output.
4371 41. Include certificate and key file names in error message when GnuTLS fails
4372 to set them up, because the GnuTLS error message doesn't include the name
4373 of the failing file when there is a problem reading it.
4375 42. Allow both -bf and -bF in the same test run.
4377 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4379 44. The "Exiscan patch" is now merged into the mainline Exim source.
4381 45. Sometimes the final signoff response after QUIT could fail to get
4382 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4383 < 0 before doing a fflush(). This bug looks as though it goes back to the
4384 introduction of TLS in release 3.20, but "sometimes" must have been rare
4385 because the tests only now provoked it.
4387 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4388 (this can affect the format of dates).
4390 47. exim_tidydb, when checking for the continued existence of a message for
4391 which it has found a message-specific retry record, was not finding
4392 messages that were in split spool directories. Consequently, it was
4393 deleting retry records that should have stayed in existence.
4395 48. Steve fixed some bugs in eximstats.
4397 49. The SPA authentication driver was not abandoning authentication and moving
4398 on to the next authenticator when an expansion was forced to fail,
4399 contradicting the general specification for all authenticators. Instead it
4400 was generating a temporary error. It now behaves as specified.
4402 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4403 (the order specifies the preference for clients). The order is now AES256,
4404 AES128, 3DES, ARCFOUR128.
4406 51. Small patch to Sieve code - explicitly set From: when generating an
4409 52. Exim crashed if a remote delivery caused a very long error message to be
4410 recorded - for instance if somebody sent an entire SpamAssassin report back
4411 as a large number of 550 error lines. This bug was coincidentally fixed by
4412 increasing the size of one of Exim's internal buffers (big_buffer) that
4413 happened as part of the Exiscan merge. However, to be on the safe side, I
4414 have made the code more robust (and fixed the comments that describe what
4417 53. Now that there can be additional text after "Completed" in log lines (if
4418 the queue_time_overall log selector is set), a one-byte patch to exigrep
4419 was needed to allow it to recognize "Completed" as not the last thing in
4422 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4423 patch that reportedly fixes this has been added. I am not expert enough to
4424 create a test for it. This is what the patch creator wrote:
4426 "I found a little strange behaviour of ldap code when working with
4427 Windows 2003 AD Domain, where users was placed in more than one
4428 Organization Units. When I tried to give exim partial DN, the exit code
4429 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4430 But simultaneously result of request was absolutely normal ldap result,
4431 so I produce this patch..."
4433 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4434 REFERENCE, so I have modified the code to exclude the patch when that macro
4437 55. Some experimental protocols are using DNS PTR records for new purposes. The
4438 keys for these records are domain names, not reversed IP addresses. The
4439 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4440 leaves it alone. Component reversal etc. now happens only for IP addresses.
4443 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4445 57. Double the size of the debug message buffer (to 2048) so that more of very
4446 long debug lines gets shown.
4448 58. The exicyclog utility now does better if the number of log files to keep
4449 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4451 59. Two changes related to the smtp_active_hostname option:
4453 (1) $smtp_active_hostname is now available as a variable.
4454 (2) The default for smtp_banner uses $smtp_active_hostname instead
4455 of $primary_hostname.
4457 60. The host_aton() function is supposed to be passed a string that is known
4458 to be a valid IP address. However, in the case of IPv6 addresses, it was
4459 not checking this. This is a hostage to fortune. Exim now panics and dies
4460 if the condition is not met. A case was found where this could be provoked
4461 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4462 components; fortuitously, this particular loophole had already been fixed
4463 by change 4.50/55 above.
4465 If there are any other similar loopholes, the new check in host_aton()
4466 itself should stop them being exploited. The report I received stated that
4467 data on the command line could provoke the exploit when Exim was running as
4468 exim, but did not say which command line option was involved. All I could
4469 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4470 running as the user.
4473 61. There was a buffer overflow vulnerability in the SPA authentication code
4474 (which came originally from the Samba project). I have added a test to the
4475 spa_base64_to_bits() function which I hope fixes it.
4478 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4479 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4481 63. The daemon start-up calls getloadavg() while still root for those OS that
4482 need the first call to be done as root, but it missed one case: when
4483 deliver_queue_load_max is set with deliver_drop_privilege. This is
4484 necessary for the benefit of the queue runner, because there is no re-exec
4485 when deliver_drop_privilege is set.
4487 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4488 This has been fixed.
4490 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4491 was in use, was not putting the data itself into the right store pool;
4492 consequently, it could be overwritten for a subsequent message in the same
4493 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4496 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4498 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4499 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4500 the function were treating the return as a boolean value, which happened to
4501 work because 0=false and not-0=true, but is not correct code.
4503 68. The host_aton() function was not handling scoped IPv6 addresses (those
4504 with, for example, "%eth0" on the end) correctly.
4506 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4507 negated items (that is, ~something) in unsigned ints. Some compilers
4508 apparently mutter when there is no cast.
4510 70. If an address verification called from an ACL failed, and did not produce a
4511 user-specific message (i.e. there was only a "system" message), nothing was
4512 put in $acl_verify_message. In this situation, it now puts the system
4515 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4516 session; change 4.31/43 added the unwanted input to the log line - except
4517 that it did not do this in the start of session case. It now does.
4519 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4520 This is wrong and can cause the other end to generate a synchronization
4521 error if it is another Exim or anything else that does the synchronization
4522 check. A QUIT command is no longer sent after a timeout.
4524 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4525 during host lookups.
4527 74. The defer_ok option of callout verification was not working if it was used
4528 when verifying addresses in header lines, that is, for this case:
4530 verify = header_sender/callout=defer_ok
4532 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4533 those file descriptors could be used for SMTP connections. If anything
4534 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4535 could be sent to the SMTP client, causing chaos. The daemon now opens
4536 stdin, stdout, and stderr to /dev/null when it puts itself into the
4539 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4540 log by default. The user can override this with suitable Perl magic.
4542 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4543 the log message when discard triggers, was not working for the DATA ACL or
4544 for the non-SMTP ACL.
4546 78. Error message wording change in sieve.c.
4548 79. If smtp_accept_max_per_host was set, the number of connections could be
4549 restricted to fewer than expected, because the daemon was trying to set up
4550 a new connection before checking whether the processes handling previous
4551 connections had finished. The check for completed processes is now done
4552 earlier. On busy systems, this bug wouldn't be noticed because something
4553 else would have woken the daemon, and it would have reaped the completed
4556 80. If a message was submitted locally by a user whose login name contained one
4557 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4558 It caused a spool format error. I have fixed the spool reading code. A
4559 related problem was that the "from" clause in the Received: line became
4560 illegal because of the space(s). It is now covered by ${quote_local_part.
4562 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4565 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4567 83. Patch from Sieve maintainer to fix unterminated string problem in
4568 "vacation" handling.
4570 84. Some minor changes to the Linux configuration files to help with other
4571 OS variants using glibc.
4573 85. One more patch for Sieve to update vacation handling to latest spec.
4576 ----------------------------------------------------
4577 See the note above about the 4.44 and 4.50 releases.
4578 ----------------------------------------------------
4584 1. Change 4.43/35 introduced a bug that caused file counts to be
4585 incorrectly computed when quota_filecount was set in an appendfile
4588 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4589 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4592 3. Give more explanation in the error message when the command for a transport
4593 filter fails to execute.
4595 4. There are several places where Exim runs a non-Exim command in a
4596 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4597 was being done only for the command run by the queryprogram router. It is
4598 now done for all such subprocesses. The other cases are: ${run, transport
4599 filters, and the commands run by the lmtp and pipe transports.
4601 5. Some older OS have a limit of 256 on the maximum number of file
4602 descriptors. Exim was using setrlimit() to set 1000 as a large value
4603 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4604 systems. I've change it so that if it can't get 1000, it tries for 256.
4606 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4607 was an oversight, and furthermore, ever since the addition of extra
4608 controls (e.g. 4.43/32), the checks on when to allow different forms of
4609 "control" were broken. There should now be diagnostics for all cases when a
4610 control that does not make sense is encountered.
4612 7. $recipients is now available in the predata ACL (oversight).
4614 8. Tidy the search cache before the fork to do a delivery from a message
4615 received from the command line. Otherwise the child will trigger a lookup
4616 failure and thereby defer the delivery if it tries to use (for example) a
4617 cached ldap connection that the parent has called unbind on.
4619 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4620 of $address_data from the recipient verification was clobbered by the
4621 sender verification.
4623 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4624 was its contents. (It was OK if the option was not defined at all.)
4626 11. A "Completed" log line is now written for messages that are removed from
4627 the spool by the -Mrm option.
4629 12. $host_address is now set to the target address during the checking of
4630 ignore_target_hosts.
4632 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4633 being passed; this would have caused $sender_host_name to have been used if
4634 matching the list had actually called for a host name (not very likely,
4635 since this list is usually IP addresses). A host name is now passed as
4638 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4639 code that specifies a non-restarting handler (typically sigaction() in
4640 modern systems) in an attempt to fix a rare and obscure crash bug.
4642 15. Narrowed the window for a race in the daemon that could cause it to ignore
4643 SIGCHLD signals. This is not a major problem, because they are used only to
4644 wake it up if nothing else does.
4646 16. A malformed maildirsize file could cause Exim to calculate negative values
4647 for the mailbox size or file count. Odd effects could occur as a result.
4648 The maildirsize information is now recalculated if the size or filecount
4651 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4652 support for a long time. Removed HAVE_SYS_VFS_H.
4654 18. Updated exipick to current release from John Jetmore.
4656 19. Allow an empty sender to be matched against a lookup in an address list.
4657 Previously the only cases considered were a regular expression, or an
4660 20. Exim went into a mad DNS lookup loop when doing a callout where the
4661 host was specified on the transport, if the DNS lookup yielded more than
4664 21. The RFC2047 encoding function was originally intended for short strings
4665 such as real names; it was not keeping to the 75-character limit for
4666 encoded words that the RFC imposes. It now respects the limit, and
4667 generates multiple encoded words if necessary. To be on the safe side, I
4668 have increased the buffer size for the ${rfc2047: expansion operator from
4671 22. Failure to deliver a bounce message always caused it to be frozen, even if
4672 there was an errors_to setting on the router. The errors_to setting is now
4675 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4676 canonical form (fully expanded) before being placed in
4677 $sender_host_address.
4679 24. Updated eximstats to version 1.33
4681 25. Include certificate and key file names in error message when GnuTLS fails
4682 to set them up, because the GnuTLS error message doesn't include the name
4683 of the failing file when there is a problem reading it.
4685 26. Expand error message when OpenSSL has problems setting up cert/key files.
4688 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4689 (this can affect the format of dates).
4691 28. exim_tidydb, when checking for the continued existence of a message for
4692 which it has found a message-specific retry record, was not finding
4693 messages that were in split spool directories. Consequently, it was
4694 deleting retry records that should have stayed in existence.
4696 29. eximstats updated to version 1.35
4697 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4698 1.35 - bugfix such that pie charts by volume are generated correctly
4700 30. The SPA authentication driver was not abandoning authentication and moving
4701 on to the next authenticator when an expansion was forced to fail,
4702 contradicting the general specification for all authenticators. Instead it
4703 was generating a temporary error. It now behaves as specified.
4705 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4706 (the order specifies the preference for clients). The order is now AES256,
4707 AES128, 3DES, ARCFOUR128.
4709 31. Small patch to Sieve code - explicitly set From: when generating an
4712 32. Exim crashed if a remote delivery caused a very long error message to be
4713 recorded - for instance if somebody sent an entire SpamAssassin report back
4714 as a large number of 550 error lines. This bug was coincidentally fixed by
4715 increasing the size of one of Exim's internal buffers (big_buffer) that
4716 happened as part of the Exiscan merge. However, to be on the safe side, I
4717 have made the code more robust (and fixed the comments that describe what
4720 33. Some experimental protocols are using DNS PTR records for new purposes. The
4721 keys for these records are domain names, not reversed IP addresses. The
4722 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4723 leaves it alone. Component reversal etc. now happens only for IP addresses.
4726 34. The host_aton() function is supposed to be passed a string that is known
4727 to be a valid IP address. However, in the case of IPv6 addresses, it was
4728 not checking this. This is a hostage to fortune. Exim now panics and dies
4729 if the condition is not met. A case was found where this could be provoked
4730 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4731 components; fortuitously, this particular loophole had already been fixed
4732 by change 4.50/55 or 4.44/33 above.
4734 If there are any other similar loopholes, the new check in host_aton()
4735 itself should stop them being exploited. The report I received stated that
4736 data on the command line could provoke the exploit when Exim was running as
4737 exim, but did not say which command line option was involved. All I could
4738 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4739 running as the user.
4742 35. There was a buffer overflow vulnerability in the SPA authentication code
4743 (which came originally from the Samba project). I have added a test to the
4744 spa_base64_to_bits() function which I hope fixes it.
4747 36. The daemon start-up calls getloadavg() while still root for those OS that
4748 need the first call to be done as root, but it missed one case: when
4749 deliver_queue_load_max is set with deliver_drop_privilege. This is
4750 necessary for the benefit of the queue runner, because there is no re-exec
4751 when deliver_drop_privilege is set.
4753 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4754 was in use, was not putting the data itself into the right store pool;
4755 consequently, it could be overwritten for a subsequent message in the same
4756 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4759 38. Sometimes the final signoff response after QUIT could fail to get
4760 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4761 < 0 before doing a fflush(). This bug looks as though it goes back to the
4762 introduction of TLS in release 3.20, but "sometimes" must have been rare
4763 because the tests only now provoked it.
4769 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4770 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4771 Now it returns an integer. A number of calls were still expecting a T/F
4772 return. Fortuitously, in all cases, the tests worked in OK situations,
4773 which is the norm. However, things would have gone wrong on any write
4774 failures on the smtp file descriptor. This function is used when sending
4775 messages over SMTP and also when doing verify callouts.
4777 2. When Exim is called to do synchronous delivery of a locally submitted
4778 message (the -odf or -odi options), it no longer closes stderr before doing
4781 3. Implemented the mua_wrapper option.
4783 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4785 5. Implemented the functions header_remove(), header_testname(),
4786 header_add_at_position(), and receive_remove_recipient(), and exported them
4789 6. If an ACL "warn" statement specified the addition of headers, Exim already
4790 inserted X-ACL-Warn: at the start if there was no header name. However, it
4791 was not making this test for the second and subsequent header lines if
4792 there were newlines in the string. This meant that an invalid header could
4793 be inserted if Exim was badly configured.
4795 7. Allow an ACL "warn" statement to add header lines at the start or after all
4796 the Received: headers, as well as at the end.
4798 8. Added the rcpt_4xx retry error code.
4800 9. Added postmaster_mailfrom=xxx to callout verification option.
4802 10. Added mailfrom=xxxx to the callout verification option, for verify=
4805 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4806 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4808 12. Inserted some casts to stop certain compilers warning when using pointer
4809 differences as field lengths or precisions in printf-type calls (mostly
4810 affecting debugging statements).
4812 13. Added optional readline() support for -be (dynamically loaded).
4814 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4815 same clock tick as a message's arrival, so that its received time was the
4816 same as the "first fail" time on the retry record, and that message
4817 remained on the queue past the ultimate address timeout, every queue runner
4818 would try a delivery (because it was past the ultimate address timeout) but
4819 after another failure, the ultimate address timeout, which should have then
4820 bounced the address, did not kick in. This was a "< instead of <=" error;
4821 in most cases the first failure would have been in the next clock tick
4822 after the received time, and all would be well.
4824 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4825 being recognized when the domain list was tested by the match_domain
4826 condition in an expansion string.
4828 16. Added the ${str2b64: operator.
4830 17. Exim was always calling setrlimit() to set a large limit for the number of
4831 processes, without checking whether the existing limit was already
4832 adequate. (It did check for the limit on file descriptors.) Furthermore,
4833 errors from getrlimit() and setrlimit() were being ignored. Now they are
4834 logged to the main and panic logs, but Exim does carry on, to try to do its
4835 job under whatever limits there are.
4837 18. Imported PCRE 5.0.
4839 19. Trivial typo in log message " temporarily refused connection" (the leading
4842 20. If the log selector return_path_on_delivery was set and an address was
4843 redirected to /dev/null, the delivery process crashed because it assumed
4844 that a return path would always be set for a "successful" delivery. In this
4845 case, the whole delivery is bypassed as an optimization, and therefore no
4848 21. Internal re-arrangement: the function for sending a challenge and reading
4849 a response while authentication was assuming a zero-terminated challenge
4850 string. It's now changed to take a pointer and a length, to allow for
4851 binary data in such strings.
4853 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4855 23. Exim was not respecting finduser_retries when seeking the login of the
4856 uid under which it was called; it was always trying 10 times. (The default
4857 setting of finduser_retries is zero.) Also, it was sleeping after the final
4858 failure, which is pointless.
4860 24. Implemented tls_on_connect_ports.
4862 25. Implemented acl_smtp_predata.
4864 26. If the domain in control=submission is set empty, Exim assumes that the
4865 authenticated id is a complete email address when it generates From: or
4866 Sender: header lines.
4868 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4869 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4870 chown and chgrp in /bin and hostname in /usr/bin.
4872 28. Exim was keeping the "process log" file open after each use, just as it
4873 does for the main log. This opens the possibility of it remaining open for
4874 long periods when the USR1 signal hits a daemon. Occasional processlog
4875 errors were reported, that could have been caused by this. Anyway, it seems
4876 much more sensible not to leave this file open at all, so that is what now
4879 29. The long-running daemon process does not normally write to the log once it
4880 has entered its main loop, and it closes the log before doing so. This is
4881 so that log files can straightforwardly be renamed and moved. However,
4882 there are a couple of unusual error situations where the daemon does write
4883 log entries, and I had neglected to close the log afterwards.
4885 30. The text of an SMTP error response that was received during a remote
4886 delivery was being truncated at 512 bytes. This is too short for some of
4887 the long messages that one sometimes sees. I've increased the limit to
4890 31. It is now possible to make retry rules that apply only when a message has a
4891 specific sender, in particular, an empty sender.
4893 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4894 it possible to be selective about when SMTP synchronization is enforced.
4896 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4898 32. Implemented hosts_connection_nolog.
4900 33. Added an ACL for QUIT.
4902 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4905 35. Added mailbox_size and mailbox_filecount to appendfile.
4907 36. Added control = no_multiline_responses to ACLs.
4909 37. There was a bug in the logic of the code that waits for the clock to tick
4910 in the case where the clock went backwards by a substantial amount such
4911 that the microsecond fraction of "now" was more than the microsecond
4912 fraction of "then" (but the whole seconds number was less).
4914 38. Added support for the libradius Radius client library this is found on
4915 FreeBSD (previously only the radiusclient library was supported).
4921 1. When certain lookups returned multiple values in the form name=value, the
4922 quoting of the values was not always being done properly. Specifically:
4923 (a) If the value started with a double quote, but contained no whitespace,
4925 (b) If the value contained whitespace other than a space character (i.e.
4926 tabs or newlines or carriage returns) it was not quoted.
4927 This fix has been applied to the mysql and pgsql lookups by writing a
4928 separate quoting function and calling it from the lookup code. The fix
4929 should probably also be applied to nisplus, ibase and oracle lookups, but
4930 since I cannot test any of those, I have not disturbed their existing code.
4932 2. A hit in the callout cache for a specific address caused a log line with no
4933 reason for rejecting RCPT. Now it says "Previous (cached) callout
4934 verification failure".
4936 3. There was an off-by-one bug in the queryprogram router. An over-long
4937 return line was truncated at 256 instead of 255 characters, thereby
4938 overflowing its buffer with the terminating zero. As well as fixing this, I
4939 have increased the buffer size to 1024 (and made a note to document this).
4941 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4942 when Exim is waiting for an SMTP response from a remote server, Exim
4943 restarts its select() call on the socket, thereby resetting its timeout.
4944 This is not a problem when such interrupts are rare. Somebody set up a cron
4945 job to run exiwhat every 2 minutes, which is less than the normal select()
4946 timeout (5 or 10 minutes). This meant that the select() timeout never
4947 kicked in because it was always reset. I have fixed this by comparing the
4948 time when an interrupt arrives with the time at the start of the first call
4949 to select(). If more time than the timeout has elapsed, the interrupt is
4950 treated as a timeout.
4952 5. Some internal re-factoring in preparation for the addition of Sieve
4953 extensions (by MH). In particular, the "personal" test is moved to a
4954 separate function, and given an option for scanning Cc: and Bcc: (which is
4955 not set for Exim filters).
4957 6. When Exim created an email address using the login of the caller as the
4958 local part (e.g. when creating a From: or Sender: header line), it was not
4959 quoting the local part when it contained special characters such as @.
4961 7. Installed new OpenBSD configuration files.
4963 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4964 try to make them clearer.
4966 9. Callout options, other than the timeout value, were being ignored when
4967 verifying sender addresses in header lines. For example, when using
4969 verify = header_sender/callout=no_cache
4971 the cache was (incorrectly) being used.
4973 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4974 only the Cygwin environment.
4976 11. When return_path_on_delivery was set as a log selector, if different remote
4977 addresses in the same message used different return paths and parallel
4978 remote delivery occurred, the wrong values would sometimes be logged.
4979 (Whenever a remote delivery process finished, the return path value from
4980 the most recently started remote delivery process was logged.)
4982 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4983 lines when AUTH and/or TLS are in use. This is the "received protocol"
4984 field. Exim used to use "asmtp" for authenticated SMTP, without any
4985 indication (in the protocol name) for TLS use. Now it follows the RFC and
4986 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4987 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4988 names appear in log lines as well as in Received: header lines.
4990 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4991 extensions, and comparison tests, and to fix some bugs.
4993 14. Changes to the "personal" filter test:
4995 (1) The test was buggy in that it was just doing the equivalent of
4996 "contains" tests on header lines. For example, if a user's address was
4997 anne@some.where, the "personal" test would incorrectly be true for
4999 To: susanne@some.where
5001 This test is now done by extracting each address from the header in turn,
5002 and checking the entire address. Other tests that are part of "personal"
5003 are now done using regular expressions (for example, to check local parts
5004 of addresses in From: header lines).
5006 (2) The list of non-personal local parts in From: addresses has been
5007 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5008 taken from the Sieve specification recommendations.
5010 (3) If the message contains any header line starting with "List-" it is
5011 treated as non-personal.
5013 (4) The test for "circular" in the Subject: header line has been removed
5014 because it now seems ill-conceived.
5016 15. Minor typos in src/EDITME comments corrected.
5018 16. Installed latest exipick from John Jetmore.
5020 17. If headers_add on a router specified a text string that was too long for
5021 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5022 of string_sprintf() is now avoided.
5024 18. $message_body_size was not set (it was always zero) when running the DATA
5025 ACL and the local_scan() function.
5027 19. For the "mail" command in an Exim filter, no default was being set for
5028 the once_repeat time, causing a random time value to be used if "once" was
5029 specified. (If the value happened to be <= 0, no repeat happened.) The
5030 default is now 0s, meaning "never repeat". The "vacation" command was OK
5031 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5032 (I found it when inspecting the code).
5034 20. There is now an overall timeout for performing a callout verification. It
5035 defaults to 4 times the callout timeout, which applies to individual SMTP
5036 commands during the callout. The overall timeout applies when there is more
5037 than one host that can be tried. The timeout is checked before trying the
5038 next host. This prevents very long delays if there are a large number of
5039 hosts and all are timing out (e.g. when the network connections are timing
5040 out). The value of the overall timeout can be changed by specifying an
5041 additional sub-option for "callout", called "maxwait". For example:
5043 verify = sender/callout=5s,maxwait=20s
5045 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5046 to the end before writing, but this should make it even safer).
5048 22. Exim was forgetting that it had advertised PIPELINING for the second and
5049 subsequent messages on an SMTP connection. It was also not resetting its
5050 memory on STARTTLS and an internal HELO.
5052 23. When Exim logs an SMTP synchronization error within a session, it now
5053 records whether PIPELINING has been advertised or not.
5055 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5056 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5057 rather than long int.
5059 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5061 26. Added the never_mail option to autoreply.
5067 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5068 crash if the getsockname() call failed; this can happen if a connection is
5069 closed very soon after it is established. The problem was simply in the
5070 order in which certain operations were done, causing Exim to try to write
5071 to the SMTP stream before it had set up the file descriptor. The bug has
5072 been fixed by making things happen in the correct order.
5078 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5079 before the connection was closed, thus losing the rejection response.
5081 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5082 some early Solaris releases, but causes trouble in current releases where
5083 socklen_t is defined.
5085 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5088 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5091 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5092 that releasing the top of it at the end releases what was used for sub-
5093 expansions (unless the block got too big). However, discard this block if
5094 the first thing is a variable or header, so that we can use its block when
5095 it is dynamic (useful for very large $message_headers, for example).
5097 6. Lookups now cache *every* query, not just the most recent. A new, separate
5098 store pool is used for this. It can be recovered when all lookup caches are
5099 flushed. Lookups now release memory at the end of their result strings.
5100 This has involved some general refactoring of the lookup sources.
5102 7. Some code has been added to the store_xxx() functions to reduce the amount
5103 of flapping under certain conditions.
5105 8. log_incoming_interface used to affect only the <= reception log lines. Now
5106 it causes the local interface and port to be added to several more SMTP log
5107 lines, for example "SMTP connection from", and rejection lines.
5109 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5111 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5113 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5114 could be overwritten at the end of the current message (or the start of a
5115 new message if it was set in a HELO ACL). The value is now preserved for
5116 the duration of the SMTP connection.
5118 12. If a transport had a headers_rewrite setting, and a matching header line
5119 contained an unqualified address, that address was qualified, even if it
5120 did not match any rewriting rules. The underlying bug was that the values
5121 of the flags that permit the existence of unqualified sender and recipient
5122 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5123 non-local messages, and by -bnq for local messages) were not being
5124 preserved with the message after it was received.
5126 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5127 "next input=" as part of the text comprising the host identity instead of
5128 the correct text. The code was using the same buffer for two different
5129 strings. However, depending on which order the printing function evaluated
5130 its arguments, the bug did not always show up. Under Linux, for example, my
5131 test suite worked just fine.
5133 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5134 doesn't work with some older versions of Perl. It has been changed to "my",
5135 which in any case is probably the better facility to use.
5137 15. A really picky compiler found some instances of statements for creating
5138 error messages that either had too many or two few arguments for the format
5141 16. The size of the buffer for calls to the DNS resolver has been increased
5142 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5143 for addresses that have a lot of PTR records. This alleviates a problem; it
5144 does not fully solve it.
5146 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5147 buffer now truncates the list and logs the incident, which is the same
5148 action as happens when Exim is looking up a host name and its aliases.
5149 Previously in this situation something unpredictable would happen;
5150 sometimes it was "internal error: store_reset failed".
5152 18. If a server dropped the connection unexpectedly when an Exim client was
5153 using GnuTLS and trying to read a response, the client delivery process
5154 crashed while trying to generate an error log message.
5156 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5157 string, for example:
5159 warn message = H1: something\nH2: something
5161 the text was added as a single header line from Exim's point of view
5162 though it ended up OK in the delivered message. However, searching for the
5163 second and subsequent header lines using $h_h2: did not work. This has been
5164 fixed. Similarly, if a system filter added multiple headers in this way,
5165 the routers could not see them.
5167 20. Expanded the error message when iplsearch is called with an invalid key to
5168 suggest using net-iplsearch in a host list.
5170 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5171 ACLs are no longer actually imposed (and a message to that effect is
5174 22. If a "gecos" field in a passwd entry contained escaped characters, in
5175 particular, if it contained a \" sequence, Exim got it wrong when building
5176 a From: or a Sender: header from that name. A second bug also caused
5177 incorrect handling when an unquoted " was present following a character
5178 that needed quoting.
5180 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5181 was not being matched caselessly.
5183 24. Arranged for all hyphens in the exim.8 source to be escaped with
5186 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5187 properly. Recipient callout cache records were still being keyed to include
5188 the sender, even when use_sender was set false. This led to far more
5189 callouts that were necessary. The sender is no longer included in the key
5190 when use_sender is false.
5192 26. Added "control = submission" modifier to ACLs.
5194 27. Added the ${base62d: operator to decode base 62 numbers.
5196 28. dnsdb lookups can now access SRV records.
5198 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5199 the configuration file.
5201 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5202 (-v) mode. This makes the output for a verbose queue run more intelligible.
5204 31. Added a use_postmaster feature to recipient callouts.
5206 32. Added the $body_zerocount variable, containing the number of binary zero
5207 bytes in the message body.
5209 33. The time of last modification of the "new" subdirectory is now used as the
5210 "mailbox time last read" when there is a quota error for a maildir
5213 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5215 35. Added +ignore_unknown as a special item in host lists.
5217 36. Code for decoding IPv6 addresses in host lists is now included, even if
5218 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5219 address was recognized as an IP address, but was then not correctly decoded
5220 into binary, causing unexpected and incorrect effects when compared with
5227 1. Very minor rewording of debugging text in manualroute to say "list of
5228 hosts" instead of "hostlist".
5230 2. If verify=header_syntax was set, and a header line with an unqualified
5231 address (no domain) and a large number of spaces between the end of the
5232 name and the colon was received, the reception process suffered a buffer
5233 overflow, and (when I tested it) crashed. This was caused by some obsolete
5234 code that should have been removed. The fix is to remove it!
5236 3. When running in the test harness, delay a bit after writing a bounce
5237 message to get a bit more predictability in the log output.
5239 4. Added a call to search_tidyup() just before forking a reception process. In
5240 theory, someone could use a lookup in the expansion of smtp_accept_max_
5241 per_host which, without the tidyup, could leave open a database connection.
5243 5. Added the variables $recipient_data and $sender_data which get set from a
5244 lookup success in an ACL "recipients" or "senders" condition, or a router
5245 "senders" option, similar to $domain_data and $local_part_data.
5247 6. Moved the writing of debug_print from before to after the "senders" test
5250 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5251 problems for message scanning, either using a data ACL, or using
5252 local_scan() because the Received: header was not generated till after they
5253 were called (in order to set the time as the time of reception completion).
5254 I have revised the way this works. The header is now generated after the
5255 body is received, but before the ACL or local_scan() are called. After they
5256 are run, the timestamp in the header is updated.
5262 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5263 before starting a queue runner without re-exec. This happened only when
5264 deliver_drop_privilege was set or when the Exim user was set to root. The
5265 effect of the bug was that timeouts during subsequent deliveries caused
5266 crashes instead of being properly handled. The handler is now left at its
5267 default (and expected) setting.
5269 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5270 message, again when deliver_drop_privilege is set or Exim is run as root.
5271 The bug described in (1) was not present in this case, but the tidying up
5272 of the other signals was missing. I have made the two cases consistent.
5274 3. The ignore_target_hosts setting on a manualroute router was being ignored
5275 for hosts that were looked up using the /MX notation.
5277 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5280 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5281 operated on the sender address. After changing the $sender_address to <>
5282 for the sender address verify, Exim was re-instated it as the original
5283 (before rewriting) address, but remembering that it had rewritten it, so it
5284 wasn't rewriting it again. This bug also had the effect of breaking the
5285 sender address verification caching when the sender address was rewritten.
5287 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5288 This has been changed so that if the ip literal address matches
5289 ignore_target_hosts, the router declines.
5291 7. Added expansion conditions match_domain, match_address, and match_local_
5292 part (NOT match_host).
5294 8. The placeholder for the Received: header didn't have a length field set.
5296 9. Added code to Exim itself and to exim_lock to test for a specific race
5297 condition that could lead to file corruption when using MBX delivery. The
5298 issue is with the lockfile that is created in /tmp. If this file is removed
5299 after a process has opened it but before that process has acquired a lock,
5300 there is the potential for a second process to recreate the file and also
5301 acquire a lock. This could lead to two Exim processes writing to the file
5302 at the same time. The added code performs the same test as UW imapd; it
5303 checks after acquiring the lock that its file descriptor still refers to
5304 the same named file.
5306 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5307 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5310 11. Added the smtp_active_hostname option. If used, this will typically be made
5311 to depend on the incoming interface address. Because $interface_address is
5312 not set up until the daemon has forked a reception process, error responses
5313 that can happen earlier (such as "too many connections") no longer contain
5316 12. If an expansion in a condition on a "warn" statement fails because a lookup
5317 defers, the "warn" statement is abandoned, and the next ACL statement is
5318 processed. Previously this caused the whole ACL to be aborted.
5320 13. Added the iplsearch lookup type.
5322 14. Added ident_timeout as a log selector.
5324 15. Added tls_certificate_verified as a log selector.
5326 16. Added a global option tls_require_ciphers (compare the smtp transport
5327 option of the same name). This controls incoming TLS connections.
5329 17. I finally figured out how to make tls_require_ciphers do a similar thing
5330 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5331 before starting the TLS session.
5333 18. Tabs are now shown as \t in -bP output.
5335 19. If the log selector return_path_on_delivery was set, Exim crashed when
5336 bouncing a message because it had too many Received: header lines.
5338 20. If two routers both had headers_remove settings, and the first one included
5339 a superfluous trailing colon, the final name in the first list and the
5340 first name in the second list were incorrectly joined into one item (with a
5341 colon in the middle).
5347 1. Added -C and -D options to the exinext utility, mainly to make it easier
5348 to include in the automated testing, but these could be helpful when
5349 multiple configurations are in use.
5351 2. The exinext utility was not formatting the output nicely when there was
5352 an alternate port involved in the retry record key, nor when there was a
5353 message id as well (for retries that were specific to a specific message
5354 and a specific host). It was also confused by IPv6 addresses, because of
5355 the additional colons they contain. I have fixed the IPv4 problem, and
5356 patched it up to do a reasonable job for IPv6.
5358 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5359 delivery, the log line now contains "pipelined" if PIPELINING was used.
5361 4. An SMTP transport process used to panic and die if the bind() call to set
5362 an explicit outgoing interface failed. This has been changed; it is now
5363 treated in the same way as a connect() failure.
5365 5. A reference to $sender_host_name in the part of a conditional expansion
5366 that was being skipped was still causing a DNS lookup. This no longer
5369 6. The def: expansion condition was not recognizing references to header lines
5370 that used bh_ and bheader_.
5372 7. Added the _cache feature to named lists.
5374 8. The code for checking quota_filecount in the appendfile transport was
5375 allowing one more file than it should have been.
5377 9. For compatibility with Sendmail, the command line option
5385 and sets the incoming protocol and host name (for trusted callers). The
5386 host name and its colon can be omitted when only the protocol is to be set.
5387 Note the Exim already has two private options, -pd and -ps, that refer to
5388 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5389 "s", but I don't think that's a major issue.
5391 10. A number of refactoring changes to the code, none of which should affect
5394 (a) The number of logging options was getting close to filling up the
5395 32-bit word that was used as a bit map. I have split them into two classes:
5396 those that are passed in the argument to log_write(), and those that are
5397 only ever tested independently outside of that function. These are now in
5398 separate 32-bit words, so there is plenty of room for expansion again.
5399 There is no change in the user interface or the logging behaviour.
5401 (b) When building, for example, log lines, the code previously used a
5402 macro that called string_cat() twice, in order to add two strings. This is
5403 not really sufficiently general. Furthermore, there was one instance where
5404 it was actually wrong because one of the argument was used twice, and in
5405 one call a function was used. (As it happened, calling the function twice
5406 did not affect the overall behaviour.) The macro has been replaced by a
5407 function that can join an arbitrary number of extra strings onto a growing
5410 (c) The code for expansion conditions now uses a table and a binary chop
5411 instead of a serial search (which was left over from when there were very
5412 few conditions). Also, it now recognizes conditions like "pam" even when
5413 the relevant support is not compiled in: a suitably worded error message is
5414 given if an attempt is made to use such a condition.
5416 11. Added ${time_interval:xxxxx}.
5418 12. A bug was causing one of the ddress fields not to be passed back correctly
5419 from remote delivery subprocesses. The field in question was not being
5420 subsequently used, so this caused to problems in practice.
5422 13. Added new log selectors queue_time and deliver_time.
5424 14. Might have fixed a bug in maildirsizefile handling that threw up
5425 "unexpected character" debug warnings, and recalculated the data
5426 unnecessarily. In any case, I expanded the warning message to give more
5429 15. Added the message "Restricted characters in address" to the statements in
5430 the default ACL that block characters like @ and % in local parts.
5432 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5433 Three changes have been made:
5435 (a) There was a serious bug; a negative response to MAIL caused the whole
5436 recipient domain to be cached as invalid, thereby blocking all messages
5437 to all local parts at the same domain, from all senders. This bug has
5438 been fixed. The domain is no longer cached after a negative response to
5439 MAIL if the sender used is not empty.
5441 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5444 (c) A new callout option, "use_sender" has been added for people who want
5445 the modified behaviour.
5451 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5454 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5455 indeed breaks things for older releases.
5457 3. Added additional logging to the case where there is a problem reading data
5458 from a filter that is running in a subprocess using a pipe, in order to
5459 try to track down a specific problem.
5461 4. Testing facility fudge: when running in the test harness and attempting
5462 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5463 getting "No route to host". Convert this to a timeout.
5465 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5468 6. Some OS don't have socklen_t but use size_t instead. This affects the
5469 fifth argument of getsockopt() amongst other things. This is now
5470 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5471 can be set for individual OS. I have set it for SunOS5, OSF1, and
5472 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5473 some earlier ones do not.
5475 7. Change 4.30/15 was not doing the test caselessly.
5477 8. The standard form for an IPv6 address literal was being rejected by address
5478 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5479 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5480 this, as well as the form without the "IPv6" on the front (but only when
5481 address literals are enabled, of course).
5483 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5485 10. Exim crashed if a message with an empty sender address specified by -f
5486 encountered a router with an errors_to setting. This could be provoked only
5487 by a command such as
5491 where an empty string was supplied; "<>" did not hit this bug.
5493 11. Installed PCRE release 4.5.
5495 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5496 remained set. It is now erased.
5498 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5499 times from message ids (which are base 36 rather than the normal 62).
5501 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5502 were being counted as actual protocol errors, and logged if the log
5503 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5504 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5505 and DATA following a set of rejected RCPTs do not count as protocol errors.
5506 In other words, Exim assumes they were pipelined, though this may not
5507 actually be the case. Of course, in all cases the client gets an
5508 appropriate error code.
5510 15. If a lookup fails in an ACL condition, a message about the failure may
5511 be available; it is used if testing the ACL cannot continue, because most
5512 such messages specify what the cause of the deferral is. However, some
5513 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5514 that caused an old message to be retained and used if a later statement
5515 caused a defer, replacing the real cause of the deferral.
5517 16. If an IP address had so many PTR records that the DNS lookup buffer
5518 was not large enough to hold them, Exim could crash while trying to process
5519 the truncated data. It now detects and logs this case.
5521 17. Further to 4.21/58, another change has been made: if (and only if) the
5522 first line of a message (the first header line) ends with CRLF, a bare LF
5523 in a subsequent header line has a space inserted after it, so as not to
5524 terminate the header.
5526 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5527 unnecessarily, used atoi() instead of strtol(), and didn't check the
5528 termination when getting file sizes from file names by regex.
5530 19. Completely re-implemented the support for maildirsize files, in the light
5531 of a number of problems with the previous contributed implementation
5532 (4.30/29). In particular:
5534 . If the quota is zero, the maildirsize file is maintained, but no quota is
5537 . If the maildir directory does not exist, it is created before any attempt
5538 to write a maildirsize file.
5540 . The quota value in the file is just a cache; if the quota is changed in
5541 the transport, the new value overrides.
5543 . A regular expression is available for excluding directories from the
5546 20. The autoreply transport checks the characters in options that define the
5547 message's headers; it allows continued headers, but it was checking with
5548 isspace() after an embedded newline instead of explicitly looking for a
5551 21. If all the "regular" hosts to which an address was routed had passed their
5552 expiry times, and had not reached their retry times, the address was
5553 bounced, even if fallback hosts were defined. Now Exim should go on to try
5556 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5557 equivalent code in the SMTP transport. Some hosts send humungous responses
5558 to HELO/EHLO, more than 1024 it seems.
5560 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5561 gives compiler warnings in some environments. I've now done it "properly",
5564 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5565 (because of problems with the built-in one) was declared to return uschar *
5566 instead of char *, causing compiler failure.
5568 25. Fixed a file descriptor leak when processing alias/forward files.
5570 26. Fixed a minor format string issue in dbfn.c.
5572 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5574 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5575 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5578 29. When a sender address is verified, it is cached, to save repeating the test
5579 when there is more than one recipient in a message. However, when the
5580 verification involves a callout, it is possible for different callout
5581 options to be set for different recipients. It is too complicated to keep
5582 track of this in the cache, so now Exim always runs a verification when a
5583 callout is required, relying on the callout cache for the optimization.
5584 The overhead is duplication of the address routing, but this should not be
5587 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5588 to be verified with callout=postmaster, and the main callout worked but the
5589 postmaster check failed, the verification correctly failed. However, if a
5590 subsequent RCPT command asked for sender verification *without* the
5591 postmaster check, incorrect caching caused this verification also to fail,
5594 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5595 it was not caching the DNS options (qualify_single, search_parents) that
5596 were used when the lookup failed. A subsequent lookup with different
5597 options therefore always gave the same answer, though there were cases
5598 where it should not have. (Example: a "domains = !$mx_any" option on a
5599 dnslookup router: the "domains" option is always processed without any
5600 widening, but the router might have qualify_single set.) Now Exim uses the
5601 cached value only when the same options are set.
5603 32. Added John Jetmore's "exipick" utility to the distribution.
5605 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5606 than a timeout (e.g. a certificate is required, and is not provided), an
5607 Exim server now closes the connection immediately. Previously it waited for
5608 the client to close - but if the client is SSL, it seems that they each
5609 wait for each other, leading to a delay before one of them times out.
5611 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5612 maintained 0.8.x compatibility because I don't think many are using it, and
5613 it is clearly obsolete.
5615 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5618 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5619 client certificate was expired. A simple patch fixes this, though I don't
5620 understand the full logic of why the verify callback is called multiple
5623 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5624 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5625 which causes problems with some clients (such as the Certicom SSL Plus
5626 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5627 disables the coutermeasure allowing Eudora to connect."
5629 38. Exim was not checking that a write() to a log file succeeded. This could
5630 lead to Bad Things if a log got too big, in particular if it hit a file
5631 size limit. Exim now panics and dies if it cannot write to a log file, just
5632 as it does if it cannot open a log file.
5634 39. Modified OS/Makefile-Linux so that it now contains
5636 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5638 The two -D definitions ensure that Exim is compiled with large file
5639 support, which makes it possible to handle log files that are bigger than
5642 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5643 instance) a domain was checked against a named list that involved a lookup,
5644 causing $domain_data to be set, then another domain was checked against the
5645 same list, then the first domain was re-checked, the value of $domain_data
5646 after the final check could be wrong. In particular, if the second check
5647 failed, it could be set empty. This bug probably also applied to
5650 41. The strip_trailing_dot option was not being applied to the address given
5651 with the -f command-line option.
5653 42. The code for reading a message's header from the spool was incrementing
5654 $received_count, but never initializing it. This meant that the value was
5655 incorrect (doubled) while delivering a message in the same process in which
5656 it was received. In the most common configuration of Exim, this never
5657 happens - a fresh exec is done - but it can happen when
5658 deliver_drop_privilege is set.
5660 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5661 it now includes up to 150 characters of the unexpected data in the log
5664 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5665 and building data strings. The size of both of these buffers was 10 000
5666 bytes - far larger than anybody would *ever* want, thought I. Needless to
5667 say, somebody hit the limit. I have increased the maximum line length to
5668 20 000 and the maximum data length of concatenated lines to 100 000. I have
5669 also fixed two bugs, because there was no checking on these buffers. Tsk,
5670 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5671 buffer is too small.
5673 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5674 lsearch lookups. Now it does.
5676 46. When parsing a route_list item in a manualroute router, a fixed-length
5677 buffer was used for the list of hosts. I made this 1024 bytes long,
5678 thinking that nobody would ever have a list of hosts that long. Wrong.
5679 Somebody had a whole pile of complicated expansion conditions, and the
5680 string was silently truncated, leading to an expansion error. It turns out
5681 that it is easier to change to an unlimited length (owing to other changes
5682 that have happened since this code was originally written) than to build
5683 structure for giving a limitation error. The length of the item that
5684 expands into the list of hosts is now unlimited.
5686 47. The lsearch lookup could not handle data where the length of text line was
5687 more than 4095 characters. Such lines were truncated, leading to shortened
5688 data being returned. It should now handle lines of any length.
5690 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5691 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5694 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5695 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5696 no longer happens in comment lines. A list of replacements is now placed
5697 at the head of all of the source files, except those whose only change is
5698 to replace PERL_COMMAND in the very first #! line.
5700 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5701 messages on the queue, with a bottom-up merge sort, using code contributed
5702 by Michael Haardt. This should make operations like -bp somewhat faster on
5703 large queues. It won't affect queue runners, except when queue_run_in_order
5706 51. Installed eximstats 1.31 in the distribution.
5708 52. Added support for SRV lookups to the dnslookup router.
5710 53. If an ACL referred to $message_body or $message_body_end, the value was not
5711 reset for any messages that followed in the same SMTP session.
5713 54. The store-handling optimization for building very long strings was not
5714 differentiating between the different store pools. I don't think this
5715 actually made any difference in practice, but I've tidied it.
5717 55. While running the routers to verify a sender address, $sender_address
5718 was still set to the sender address. This is wrong, because when routing to
5719 send a bounce to the sender, it would be empty. Therefore, I have changed
5720 it so that, while verifying a sender address, $sender_address is set to <>.
5721 (There is no change to what happens when verifying a recipient address.)
5723 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5724 target A or AAAA records (if not already returned) without resetting the
5725 qualify_single or search_parents options of the DNS resolver. These are
5726 inappropriate in this case because the targets of MX and SRV records must
5727 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5728 target that, when qualified, matched something in the local domain. These
5729 two options are now turned off when doing these lookups.
5731 57. It seems that at least some releases of Reiserfs (which does not have the
5732 concept of a fixed number of inodes) returns zero and not -1 for the
5733 number of available inodes. This interacted badly with check_spool_inodes,
5734 which assumed that -1 was the "no such thing" setting. What I have done is
5735 to check that the total number of inodes is greater than zero before doing
5736 the test of how many are available.
5738 58. When a "warn" ACL statement has a log_message modifier, the message is
5739 remembered, and not repeated. This is to avoid a lot of repetition when a
5740 message has many recipients that cause the same warning to be written.
5741 However, Exim was preserving the list of already written lines for an
5742 entire SMTP session, which doesn't seem right. The memory is now reset if a
5743 new message is started.
5745 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5746 debugging output unless log_rewrite was also set.
5748 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5749 of (int)(handle) when we know that handle contains (void *)(-1).
5751 61. The Exim daemon panic-logs an error return when it closes the incoming
5752 connection. However "connection reset by peer" seems to be common, and
5753 isn't really an error worthy of noting specially, so that particular error
5756 62. When Exim is trying to find all the local interfaces, it used to panic and
5757 die if the ioctl to get the interface flags failed. However, it seems that
5758 on at least one OS (Solaris 9) it is possible to have an interface that is
5759 included in the list of interfaces, but for which you get a failure error
5760 for this call. This happens when the interface is not "plumbed" into a
5761 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5762 failure of the "get flags" call assumes that the interface is down.
5764 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5765 makes life easier for people who are doing arithmetic on fields extracted
5766 from dates, where you often get leading zeros that should not be
5767 interpreted as octal.
5769 64. Added qualify_domain to the redirect router, to override the global
5772 65. If a pathologically long header line contained very many addresses (the
5773 report of this problem mentioned 10 000) and each of them was rewritten,
5774 Exim could use up a very large amount of memory. (It kept on making new
5775 copies of the header line as it rewrote, and never released the old ones.)
5776 At the expense of a bit more processing, the header rewriting function has
5777 been changed so that it no longer eats memory in this way.
5779 66. The generation of the Received: header has been moved from the time that a
5780 message starts to be received, to the time that it finishes. The timestamp
5781 in the Received: header should now be very close to that of the <= log
5782 line. There are two side-effects of this change:
5784 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5785 logged header lines no longer include the local Received: line, because
5786 it has not yet been created. The same applies to a copy of the message
5787 that is returned to a non-SMTP sender when a message is rejected.
5789 (b) When a filter file is tested using -bf, no additional Received: header
5790 is added to the test message. After some thought, I decided that this
5793 This change does not affect the value of $received_for. It is still set
5794 after address rewriting, but before local_scan() is called.
5796 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5798 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5799 gave an unhelpful panic error message, and a defer error. I have managed to
5800 change this behaviour so that it now rejects any supplied certificate,
5801 which seems right, as the list of acceptable certificates is empty.
5803 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5804 gave an unhelpful defer error. I have not managed to make this reject any
5805 supplied certificates, but the error message it gives is "no certificate
5806 supplied", which is not helpful.
5808 70. exigrep's output now also includes lines that are not associated with any
5809 message, but which match the given pattern. Implemented by a patch from
5810 Martin Sluka, which also tidied up the Perl a bit.
5812 71. Recipient callout verification, like sender verification, was using <> in
5813 the MAIL FROM command. This isn't really the right thing, since the actual
5814 sender may affect whether the remote host accepts the recipient or not. I
5815 have changed it to use the actual sender in the callout; this means that
5816 the cache record is now keyed on a recipient/sender pair, not just the
5817 recipient address. There doesn't seem to be a real danger of callout loops,
5818 since a callout by the remote host to check the sender would use <>.
5819 [SEE ABOVE: changed after hitting problems.]
5821 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5822 temporary errors. However, in the case of such a code being given after
5823 the end of a data transmission (i.e. after ".") Exim was failing to write
5824 a retry record for the message. (Yes, there was some broken host that was
5825 actually sending 8xx at this point.)
5827 73. An unknown lookup type in a host list could cause Exim to panic-die when
5828 the list was checked. (An example that provoked this was putting <; in the
5829 middle of a list instead of at the start.) If this happened during a DATA
5830 ACL check, a -D file could be left lying around. This kind of configuration
5831 error no longer causes Exim to die; instead it causes a defer error. The
5832 incident is still logged to the main and panic logs.
5834 74. Buglet left over from Exim 3 conversion. The message "too many messages
5835 in one connection" was written to the rejectlog but not the mainlog, except
5836 when address rewriting (yes!) was being logged.
5838 75. Added write_rejectlog option.
5840 76. When a system filter was run not as root (that is, when system_filter_user
5841 was set), the values of the $n variables were not being returned to the
5842 main process; thus, they were not subsequently available in the $sn
5845 77. Added +return_path_on_delivery log selector.
5847 78. A connection timeout was being treated differently from recipients deferred
5848 when testing hosts_max_try with a message that was older than the host's
5849 retry timeout. (The host should not be counted, thus allowing all hosts to
5850 be tried at least once before bouncing.) This may have been the cause of an
5851 occasionally reported bug whereby a message would remain on the queue
5852 longer than the retry timeout, but would be bounced if a delivery was
5853 forced. I say "may" because I never totally pinned down the problem;
5854 setting up timeout/retry tests is difficult. See also the next item.
5856 79. The ultimate address timeout was not being applied to errors that involved
5857 a combination of host plus message (for example, a timeout on a MAIL
5858 command). When an address resolved to a number of possible hosts, and they
5859 were not all tried for each delivery (e.g. because of hosts_max_try), a
5860 message could remain on the queue longer than the retry timeout.
5862 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5865 81. Fixed an obscure SMTP outgoing bug which required at least the following
5866 conditions: (a) there was another message waiting for the same server;
5867 (b) the server returned 5xx to all RCPT commands in the first message so
5868 that the message was not completed; (c) the server dropped the connection
5869 or gave a negative response to the RSET that Exim sends to abort the
5870 transaction. The observed case was a dropped connection after DATA that had
5871 been sent in pipelining mode. That is, the server had advertised PIPELINING
5872 but was not implementing it correctly. The effect of the bug was incorrect
5873 behaviour, such as trying another host, and this could lead to a crash.
5879 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5880 and daemon.c were passed as pointers to ints; they should have been
5881 pointers to socklen_t variables (which are typically unsigned ints).
5883 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5886 3. Fixed a really odd bug that affected only the testing scheme; patching a
5887 certain fixed string in the binary changed the value of another string that
5888 happened to be identical to the end of the original first string.
5890 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5891 name", it returns that address as the IP address. On some operating
5892 systems (e.g. Solaris), it also passes back the IP address string as the
5893 "host name". However, on others (e.g. Linux), it passes back an empty
5894 string. Exim wasn't checking for this, and was changing the host name to an
5895 empty string, assuming it had been canonicalized.
5897 5. Although rare, it is permitted to have more than one PTR record for a given
5898 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5899 all the names associated with an address, because they do in Solaris.
5900 However, it seems that they do not in Linux for data that comes from the
5901 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5902 I found this out when I moved to a new Linux workstation and tried to run
5903 the Exim test suite.
5905 To get round this problem I have changed the code so that it now does its
5906 own call to the DNS to look up PTR records when searching for a host name.
5907 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5908 addresses that are only in /etc/hosts are still found.
5910 This behaviour is, however, controlled by an option called host_lookup_
5911 order, which defaults to "bydns:byaddr". If people want to use the other
5912 order, or indeed, just use one or the other means of lookup, they can
5913 specify it in this variable.
5915 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5916 some operating systems, this comes back from gethostbyaddr() as an empty
5917 string, and this is what Exim used to test for. However, it seems that in
5918 other systems, "." is yielded. Exim now tests for this case too.
5920 7. The values of check_spool_space and check_log_space are now held internally
5921 as a number of kilobytes instead of an absolute number of bytes. If a
5922 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5923 kilobyte. This means that much larger values can be stored.
5925 8. Exim monitor: an attempt to get the action menu when not actually pointing
5926 at a message produces an empty menu entitled "No message selected". This
5927 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5928 no entries in it ("Shell widget menu has zero width and/or height"). So I
5929 have added a single, blank menu entry in this case.
5931 9. Added ${quote_local_part.
5933 10. MIME decoding is now applied to the contents of Subject: header lines when
5936 11. Now that a reference to $sender_host_address automatically causes a reverse
5937 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5938 host lookup before query-style lookups in lists that might use this
5939 variable. This has therefore been abolished, and the "net-" prefix is no
5940 longer necessary for query-style lookups.
5942 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5943 have been a typo for LFLAGS, so it has been changed.
5945 13. The install script calls Exim with "-C /dev/null" in order to find the
5946 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5947 to be output. However, since Exim outputs its version number before the
5948 error, it didn't break the script. It just looked ugly. I fixed this by
5949 always allowing "-C /dev/null" if the caller is root.
5951 14. Ignore overlarge ACL variable number when reading spool file - insurance
5952 against a later release with more variables having written the file.
5954 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5955 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5956 this, as well as the form without the "IPv6" on the front.
5958 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5959 OS/Makefile-Darwin file.
5961 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5962 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5964 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5965 variable. However, some OS use ints for inodes. I've added cast to long int
5966 to get rid of the compiler warning.
5968 19. I had forgotten to lock out "/../" in configuration file names when
5969 ALT_CONFIG_PREFIX was set.
5971 20. Routers used for verification do not need to specify transports. However,
5972 if such a router generated a host list, and callout was configured, Exim
5973 crashed, because it could not find a port number from the (non-existent)
5974 transport. It now assumes port 25 in this circumstance.
5976 21. Added the -t option to exigrep.
5978 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5979 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5980 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5981 them is set, LOOKUP_LSEARCH is forced.
5983 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5985 24. Added sender and host information to the "rejected by local_scan()" log
5986 line; previously there was no indication of these.
5988 25. Added .include_if_exists.
5990 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5991 Linux. It turns out that not all file systems support this. Apparently some
5992 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5993 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5994 not supported on the file descriptor, is now ignored when Exim is trying to
5995 sync a directory. This applies only to Linux.
5997 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5999 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6000 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6003 29. Added support for maildirsize files from supplied patch (modified a bit).
6005 30. The use of :fail: followed by an empty string could lead Exim to respond to
6006 sender verification failures with (e.g.):
6008 550 Verification failed for <xxx>
6009 550 Sender verify failed
6011 where the first response line was missing the '-' that indicates it is not
6012 the final line of the response.
6014 31. The loop for finding the name of the user that called Exim had a hardwired
6015 limit of 10; it now uses the value of finduser_retries, which is used for
6016 all other user lookups.
6018 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6021 33. Exim was neglecting to zero errno before one call of strtol() when
6022 expanding a string and expecting an integer value. On some systems this
6023 resulted in spurious "integer overflow" errors. Also, it was casting the
6024 result into an int without checking.
6026 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6027 did not work. The code looks as if it has *never* worked, though it appears
6028 to have been documented since at least release 1.62. I have made it work.
6030 35. The "timeout_DNS" error in retry rules, also documented since at least
6031 1.62, also never worked. As it isn't clear exactly what this means, and
6032 clearly it isn't a major issue, I have abolished the feature by treating it
6033 as "timeout", and writing a warning to the main and panic logs.
6035 36. The display of retry rules for -brt wasn't always showing the error code
6038 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6039 timeout_connect_A, timeout_connect_MX.
6041 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6042 to the empty sender.
6044 39. The daemon was not analysing the content of -oX till after it had closed
6045 stderr and disconnected from the controlling terminal. This meant that any
6046 syntax errors were only noted on the panic log, and the return code from
6047 the command was 0. By re-arranging the code a little, I've made the
6048 decoding happen first, so such errors now appear on stderr, and the return
6049 code is 1. However, the actual setting up of the sockets still happens in
6050 the disconnected process, so errors there are still only recorded on the
6053 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6054 connections (as happens on some IP stacks) was logged at start up time as
6055 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6056 it from "IPv6 and IPv4", which means that two separate sockets are being
6059 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6060 says whether AF_INET or AF_INET6 was passed as an argument.
6062 42. Exiwhat output was messed up when time zones were included in log
6065 43. Exiwhat now gives more information about the daemon's listening ports,
6066 and whether -tls-on-connect was used.
6068 44. The "port" option of the smtp transport is now expanded.
6070 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6071 silently ignored. Now an error message is written to the main and panic
6074 46. There's a new ACL modifier called "logwrite" which writes to a log file
6075 as soon as it is encountered.
6077 47. Added $local_user_uid and $local_user_gid at routing time.
6079 48. Exim crashed when trying to verify a sender address that was being
6082 49. Exim was recognizing only a space character after ".include". It now also
6083 recognizes a tab character.
6085 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6086 extracting the relevant information from the specification. The man page no
6087 longer contains scrambled data for the -d option, and I've added a section
6088 at the front about calling Exim under different names.
6090 51. Added "extra_headers" argument to the "mail" command in filter files.
6092 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6095 53. Installed eximstats 1.29.
6097 54. Added transport_filter_timeout as a generic transport option.
6099 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6100 Cc: header lines. This was required by RFC 822, but it not required by RFC
6103 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6104 incoming messages that did not have them. Now it does so only if the
6105 message originates locally, that is, if there is no associated remote host
6106 address. When Resent- header lines are present, this applies to the Resent-
6107 lines rather than the non-Resent- lines.
6109 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6110 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6112 58. Messages for configuration errors now include the name of the main
6113 configuration file - useful now that there may be more than one file in a
6114 list (.included file names were always shown).
6116 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6117 for those rare installations that do not start the daemon as root or run it
6118 setuid root. I've cut out the call to initgroups() if the daemon is not
6121 60. The Exim user and group can now be bound into the binary as text strings
6122 that are looked up at the start of Exim's processing.
6124 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6126 62. Added $mailstore_basename variable.
6128 63. Installed patch to sieve.c from Michael Haardt.
6130 64. When Exim failed to open the panic log after failing to open the main log,
6131 the original message it was trying to log was written to stderr and debug
6132 output, but if they were not available (the usual case in production), it
6133 was lost. Now it is written to syslog before the two lines that record the
6134 failures to open the logs.
6136 65. Users' Exim filters run in subprocesses under the user's uid. It is
6137 possible for a "deliver" command or an alias in a "personal" command to
6138 provoke an address rewrite. If logging of address rewriting is configured,
6139 this fails because the process is not running as root or exim. There may be
6140 a better way of dealing with this, but for the moment (because 4.30 needs
6141 to be released), I have disabled address rewrite logging when running a
6142 filter in a non-root, non-exim process.
6148 1. The buildconfig auxiliary program wasn't quoting the value set for
6149 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6150 not defined. This bug was masked in 4.22 by the effect that was fixed in
6153 2. Some messages that were rejected after a message id was allocated were
6154 shown as "incomplete" by exigrep. It no longer does this for messages that
6155 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6157 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6158 have allow_domain_literals set, the ID did not get logged in the <= line.
6159 Domain literals are now always recognized in Message-ID: header lines.
6161 4. The first argument for a ${extract expansion item is the key name or field
6162 number. Leading and trailing spaces in this item were not being ignored,
6163 causing some misleading effects.
6165 5. When deliver_drop_privilege was set, single queue runner processes started
6166 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6167 same command in the process it spins off) were not dropping privilege.
6169 6. When the daemon running as "exim" started a queue runner, it always
6170 re-executed Exim in the spun-off process. This is a waste of effort when
6171 deliver_drop_privilege is set. The new process now just calls the
6172 queue-runner function directly.
6178 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6181 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6182 ignored. Though the use of -oP was forcing the writing of a pid file, it
6183 was always written to the default place.
6185 3. If the message "no IP address found for host xxxx" is generated during
6186 incoming verification, it is now followed by identification of the incoming
6187 connection (so you can more easily find what provoked it).
6189 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6191 5. Added some features to "harden" Exim a bit more against certain attacks:
6193 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6194 be put in Local/Makefile. This is like the never_users runtime option,
6195 but it cannot be overridden. The default setting is "root".
6197 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6198 prefix string with which any file named in a -C command line option
6201 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6202 is retained for -C and -D only if the caller of Exim is root. Without
6203 it, the exim user may also use -C and -D and retain privilege.
6205 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6206 command line option is disabled.
6208 6. Macro names set by the -D option must start with an upper case letter, just
6209 like macro names defined in the configuration file.
6211 7. Added "dereference=" facility to LDAP.
6213 8. Two instances of the typo "uknown" in the source files are fixed.
6215 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6216 the Configure-Makefile script screwed up while processing it.
6218 10. Incorporated PCRE 4.4.
6220 11. The SMTP synchronization check was not operating right at the start of an
6221 SMTP session. For example, it could not catch a HELO sent before the client
6222 waited for the greeting. There is now a check for outstanding input at the
6223 point when the greeting is written. Because of the duplex, asynchronous
6224 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6225 way, but not yet received, when the check is performed.
6227 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6228 on TCP/IP sockets, because this apparently causes some broken clients to
6231 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6232 unchanged) from the Cygwin maintainer.
6234 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6235 was supported instead of testing for mbx. Effectively a typo.
6237 15. The spa authenticator server code was not checking that the input it
6238 received was valid base64.
6240 16. The debug output line for the "set" modifier in ACLs was not showing the
6241 name of the variable that was being set.
6243 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6245 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6246 lookup on its own. Something else was needed to trigger the lookup. For
6247 example, a match in host_lookup or the need for a host name in a host list.
6248 Now, if $sender_host_name is referenced and the host name has not yet been
6249 looked up, a lookup is performed. If the lookup fails, the variable remains
6250 empty, and $host_lookup_failed is set to "1".
6252 19. Added "eqi" as a case-independent comparison operator.
6254 20. The saslauthd authentication condition could segfault if neither service
6255 nor realm was specified.
6257 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6258 error message that was logged was misleading, and incoming SMTP
6259 connections were dropped. The message is now more accurate, and temporary
6260 errors are given to SMTP connections.
6262 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6263 (except RSET) with a 421 error, until QUIT is received. However, it was
6264 failing to send a response to QUIT.
6266 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6267 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6268 ACL is now run after the helo_try_verify_hosts code.
6270 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6271 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6272 case-independent, so other case variants are also recognized). Apparently
6273 some systems use these upper case variants.
6275 25. If more than two messages were waiting for the same host, and a transport
6276 filter was specified for the transport, Exim sent two messages over the
6277 same TCP/IP connection, and then failed with "socket operation on non-
6278 socket" when it tried to send the third.
6280 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6282 27. The extern definition of crypt16() in expand.c was not being excluded when
6283 the OS had its own crypt16() function.
6285 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6286 as a preferred synonym for return_size_limit, both as an option and as an
6289 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6291 30. Changed the default configuration ACL to relax the local part checking rule
6292 for addresses that are not in any local domains. For these addresses,
6293 slashes and pipe symbols are allowed within local parts, but the sequence
6294 /../ is explicitly forbidden.
6296 31. SPA server authentication was not clearing the challenge buffer before
6299 32. log_message in a "warn" ACL statement was writing to the reject log as
6300 well as to the main log, which contradicts the documentation and doesn't
6301 seem right (because no rejection is happening). So I have stopped it.
6303 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6304 However, I am unable to do any testing of this.
6306 34. Fixed an infelicity in the appendfile transport. When checking directories
6307 for a mailbox, to see if any needed to be created, it was accidentally
6308 using path names with one or more superfluous leading slashes; tracing
6309 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6311 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6312 contents are added to the log line that is written for every discarded
6313 recipient. (Previously a log_message setting was ignored.)
6315 36. The ${quote: operator now quotes the string if it is empty.
6317 37. The install script runs exim in order to find its version number. If for
6318 some reason other than non-existence or emptiness, which it checks, it
6319 could not run './exim', it was installing it with an empty version number,
6320 i.e. as "exim-". This error state is now caught, and the installation is
6323 38. An argument was missing from the function that creates an error message
6324 when Exim fails to connect to the socket for saslauthd authentication.
6325 This could cause Exim to crash, or give a corrupted message.
6327 39. Added isip, isip4, and isip6 to ${if conditions.
6329 40. The ACL variables $acl_xx are now saved with the message, and can be
6330 accessed later in routers, transports, and filters.
6332 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6333 strings in the file are not string-expanded.
6335 42. If a MAIL command specified a SIZE value that was too large to fit into an
6336 int variable, the check against message_size_limit failed. Such values are
6337 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6338 day this will have to be increased, but I don't think I want to be around
6339 when emails are that large.
6346 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6347 iconv() is not standard in FreeBSD.
6349 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6350 IPv6 enabled. The observed symptom was a segmentation fault on return from
6351 the function os_common_find_running_interfaces() in src/os.c.
6353 3. In the check_special_case() function in daemon.c I had used "errno" as an
6354 argument name, which causes warnings on some systems. This was basically a
6355 typo, since it was named "eno" in the comments!
6357 4. The code that waits for the clock to tick (at a resolution of some fraction
6358 of a second) so as to ensure message-id uniqueness was always waiting for
6359 at least one whole tick, when it could have waited for less. [This is
6360 almost certainly not relevant at current processor speeds, where it is
6361 unlikely to ever wait at all. But we try to future-proof.]
6363 5. The function that sleeps for a time interval that includes fractions of a
6364 second contained a race. It did not block SIGALRM between setting the
6365 timer, and suspending (a couple of lines later). If the interval was short
6366 and the sigsuspend() was delayed until after it had expired, the suspension
6367 never ended. On busy systems this could lead to processes getting stuck for
6370 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6371 process, before it forks any delivery processes. The open lookup caching
6372 mechanism meant that the open file or database connection was passed into
6373 the delivery process. The problem was that delivery processes always tidy
6374 up cached lookup data. This could cause a problem for the next delivery
6375 process started by the queue runner, because the external queue runner
6376 process does not know about the closure. So the next delivery process
6377 still has data in the lookup cache. In the case of a file lookup, there was
6378 no problem because closing a file descriptor in a subprocess doesn't affect
6379 the parent. However, if the lookup was caching a connection to a database,
6380 the connection was closed, and the second delivery process was likely to
6381 see errors such as "PGSQL: query failed: server closed the connection
6382 unexpectedly". The problem has been fixed by closing all cached lookups
6383 in a queue runner before running a delivery process.
6385 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6386 seem to have the "const" qualifier which it has on other OS. I've
6389 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6390 *of the same type* (client or server) with the same public name that an
6391 error should be diagnosed.
6393 9. When Exim looked up a host name for an IP address, but failed to find the
6394 original IP address when looking up the host name (a safety check), it
6395 output the message "<ip address> does not match any IP for NULL", which was
6396 confusing, to say the least. The bug was that the host name should have
6397 appeared instead of "NULL".
6399 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6400 user that is built into the binary, and the -C or -D options is used, root
6401 privilege is dropped before the configuration file is read. In addition,
6402 logging is switched to stderr instead of the normal log files. If the
6403 configuration then re-defines the Exim user, the unprivileged environment
6404 is probably not what is expected, so Exim logs a panic warning message (but
6407 However, if deliver_drop_privilege is set, the unprivileged state may well
6408 be exactly what is intended, so the warning has been cut out in that case,
6409 and Exim is allowed to try to write to its normal log files.
6415 1. smtp_return_error_details was not giving details for temporary sender
6416 or receiver verification errors.
6418 2. Diagnose a configuration error if two authenticators have the same public
6421 3. Exim used not to create the message log file for a message until the first
6422 delivery attempt. This could be confusing when incoming messages were held
6423 for policy or load reasons. The message log file is now created at the time
6424 the message is received, and an initial "Received" line is written to it.
6426 4. The automatically generated man page for command line options had a minor
6427 bug that caused no ill effects; however, a more serious problem was that
6428 the procedure for building the man page automatically didn't always
6429 operate. Consequently, release 4.20 contains an out-of-date version. This
6430 shouldn't happen again.
6432 5. When building Exim with embedded Perl support, the script that builds the
6433 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6434 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6436 6. The freeze_tell option was not being used for messages that were frozen on
6437 arrival, either by an ACL or by local_scan().
6439 7. Added the smtp_incomplete_transaction log selector.
6441 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6442 was accepting AUTH without a new EHLO.
6444 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6445 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6448 10. Logging of TCP/IP connections (when configured) now happens in the main
6449 daemon process instead of the child process, so that the TCP/IP connection
6450 count is more accurate (but it can never be perfect).
6452 11. The use of "drop" in a nested ACL was not being handled correctly in the
6453 outer ACL. Now, if condition failure induced by the nested "drop" causes
6454 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6455 or "require"), the connection is dropped.
6457 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6458 that yield "discard" can now be used with an "accept" or a "discard" verb,
6459 but an error is generated for any others (because I can't see a useful way
6460 to define what should happen).
6462 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6463 are now processed in the same way as lines in the Exim configuration file.
6464 In particular, continuation lines are supported.
6466 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6468 15. Added -ti meaning -t -i.
6470 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6471 domains, and warn by logging if others are found.
6473 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6474 returned from GIFCONF when Exim is trying to find the list of interfaces on
6475 a host. The code in os.c has been modified to copy each ifreq to an aligned
6476 structure in all cases.
6478 Also, in some cases, the returned ifreq's were being copied to a 'struct
6479 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6480 means the last couple of bytes of an IPv6 address could be chopped if the
6481 ifreq contained only a normal sockaddr (14 bytes storage).
6483 18. Named domain lists were not supported in the hosts_treat_as_local option.
6484 An entry such as +xxxx was not recognized, and was treated as a literal
6487 19. Ensure that header lines added by a DATA ACL are included in the reject log
6488 if the ACL subsequently rejects the message.
6490 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6491 MD5 (which is deprecated).
6493 21. When testing a filter file using -bf, Exim was writing a message when it
6494 took the sender from a "From " line in the message, but it was not doing so
6495 when it took $return_path from a Return-Path: header line. It now does.
6497 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6498 with a valid header line field name (a series of printing characters
6499 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6501 23. Changed "disc" in the source to "disk" to conform to the documentation and
6502 the book and for uniformity.
6504 24. Ignore Sendmail's -Ooption=value command line item.
6506 25. When execve() failed while trying to run a command in a pipe transport,
6507 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6508 could be confused with a return value of 69 from the command itself. This
6509 has been changed to 127, the value the shell returns if it is asked to run
6510 a non-existent command. The wording for the related log line suggests a
6511 non-existent command as the problem.
6513 26. If received_header_text expands to an empty string, do not add a Received:
6514 header line to the message. (Well, it adds a token one on the spool, but
6515 marks it "old" so that it doesn't get used or transmitted.)
6517 27. Installed eximstats 1.28 (addition of -nt option).
6519 28. There was no check for failure on the call to getsockname() in the daemon
6520 code. This can fail if there is a shortage of resources on the system, with
6521 ENOMEM, for example. A temporary error is now given on failure.
6523 29. Contrary to the C standard, it seems that in some environments, the
6524 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6525 program. Exim now does this explicitly; it affects the formatting of
6526 timestamps using strftime().
6528 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6529 complaints. I've now initialized all the variables, to avoid this.
6531 32. Header lines added by a system filter were not being "seen" during
6532 transport-time rewrites.
6534 33. The info_callback() function passed to OpenSSL is set up with type void
6535 (*)(SSL *, int, int), as described somewhere. However, when calling the
6536 function (actually a macro) that sets it up, the type void(*)() is
6537 expected. I've put in a cast to prevent warnings from picky compilers.
6539 34. If a DNS black list lookup found a CNAME record, but there were no A
6540 records associated with the domain it pointed at, Exim crashed.
6542 35. If a DNS black list lookup returned more than one A record, Exim ignored
6543 all but the first. It now scans all returned addresses if a particular IP
6544 value is being sought. In this situation, the contents of the
6545 $dnslist_value variable are a list of all the addresses, separated by a
6548 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6549 to accept a host name and all its aliases if the forward lookup for any of
6550 them yielded the IP address of the incoming connection. Now it accepts only
6551 those names whose forward lookup yields the correct IP address. Any other
6552 names are discarded. This closes a loophole whereby a rogue DNS
6553 administrator could create reverse DNS records to break through a
6554 wildcarded host restriction in an ACL.
6556 37. If a user filter or a system filter that ran in a subprocess used any of
6557 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6558 the wrong values were passed to the pipe command ($thisaddress had the
6559 value of $0, $0 had the value of $1, etc). This bug was introduced by
6560 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6562 38. Improved the line breaking for long SMTP error messages from ACLs.
6563 Previously, if there was no break point between 40 and 75 characters, Exim
6564 left the rest of the message alone. Two changes have been made: (a) I've
6565 reduced the minimum length to 35 characters; (b) if it can't find a break
6566 point between 35 and 75 characters, it looks ahead and uses the first one
6567 that it finds. This may give the occasional overlong line, but at least the
6568 remaining text gets split now.
6570 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6571 file descriptors might be low, and that setting 1000 would always raise it.
6572 It turns out that in some environments, the limit is already over 1000 and
6573 that lowering it causes trouble. So now Exim takes care not to decrease it.
6575 40. When delivering a message, the value of $return_path is set to $sender_
6576 address at the start of routing (routers may change the value). By an
6577 oversight, this default was not being set up when an address was tested by
6578 -bt or -bv, which affected the outcome if any router or filter referred to
6581 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6582 log only when "message" or "log_message" are set. However, if one of the
6583 conditions was an address verification, or a call to a nested ACL, the
6584 messages generated by the underlying test were being passed through. This
6585 no longer happens. The underlying message is available in $acl_verify_
6586 message for both "message" and "log_message" expansions, so it can be
6587 passed through if needed.
6589 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6590 new expansion $bh_ to give the encoded byte string without charset
6591 translation. Translation happens only if iconv() is available; HAVE_ICONV
6592 indicates this at build time. HEADERS_CHARSET gives the charset to
6593 translate to; headers_charset can change it in the configuration, and
6594 "headers charset" can change it in an individual filter file.
6596 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6597 that creates RFC 2047 encoded "words" labels them as that charset instead
6598 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6599 expansion operator; (ii) when Exim creates a From: line for a local
6600 message; (iii) when a header line is rewritten to include a "phrase" part.
6602 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6603 buggy, causing it to skip the first lines of messages whose message ID
6604 ended in 'D'. This would not have bitten before Exim release 4.14, because
6605 message IDs were unlikely to end in 'D' before then. The effect was to have
6606 incorrect size information for certain domains.
6608 45. #include "config.h" was missing at the start of the crypt16.c module. This
6609 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6612 46. If there was a timeout during a "random" callout check, Exim treated it as
6613 a failure of the random address, and carried on sending RSET and the real
6614 address. If the delay was just some slowness somewhere, the response to the
6615 original RCPT would be taken as a response to RSET and so on, causing
6616 mayhem of various kinds.
6618 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6619 when I implemented it. It didn't allow for the fact that some option values
6620 may legitimately be negative (e.g. size_addition), and it didn't even do
6621 the right test for positive values.
6623 48. Domain names in DNS records are case-independent. Exim always looks them up
6624 in lower case. Some resolvers return domain names in exactly the case they
6625 appear in the zone file, that is, they may contain uppercase letters. Not
6626 all resolvers do this - some return always lower case. Exim was treating a
6627 change of case by a resolver as a change of domain, similar to a widening
6628 of a domain abbreviation. This triggered its re-routing code and so it was
6629 trying to route what was effectively the same domain again. This normally
6630 caused routing to fail (because the router wouldn't handle the domain
6631 twice). Now Exim checks for this case specially, and just changes the
6632 casing of the domain that it ultimately uses when it transmits the message
6635 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6638 50. If a filter generated a file delivery with a non-absolute name (possible if
6639 no home directory exists for the router), the forbid_file option was not
6642 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6643 the existing equality matching.
6645 52. Exim was using ints instead of ino_t variables in some places where it was
6646 dealing with inode numbers.
6648 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6649 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6650 called TMPDIR, and if it finds it is different, it changes its value.
6652 54. The smtp_printf() function is now made available to local_scan() so
6653 additional output lines can be written before returning. There is also an
6654 smtp_fflush() function to enable the detection of a dropped connection.
6655 The variables smtp_input and smtp_batched_input are exported to
6658 55. Changed the default runtime configuration: the message "Unknown user"
6659 has been removed from the ACL, and instead placed on the localuser router,
6660 using the cannot_route_message feature. This means that any verification
6661 failures that generate their own messages won't get overridden. Similarly,
6662 the "Unrouteable address" message that was in the ACL for unverifiable
6663 relay addresses has also been removed.
6665 56. Added hosts_avoid_esmtp to the smtp transport.
6667 57. The exicyclog script was not checking for the esoteric option
6668 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6669 will work only if exicyclog is run under the appropriate euid.
6671 58. Following a discussion on the list, the rules by which Exim recognises line
6672 endings on incoming messages have been changed. The -dropcr and drop_cr
6673 options are now no-ops, retained only for backwards compatibility. The
6674 following line terminators are recognized: LF CRLF CR. However, special
6675 processing applies to CR:
6677 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6678 nor a local message in the state where . is a terminator.
6680 (ii) If a bare CR is encountered in a header line, an extra space is added
6681 after the line terminator so as not to end the header. The reasoning
6682 behind this is that bare CRs in header lines are most likely either
6683 to be mistakes, or people trying to play silly games.
6685 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6686 was being incorrectly given as 18 bytes larger than it should have been.
6687 This is a VOB (very old bug).
6689 60. This may never have affected anything current, but just in case it has:
6690 When the local host is found other than at the start of a list of hosts,
6691 the local host, those with the same MX, and any that follow, are discarded.
6692 When the list in question was part of a longer list of hosts, the following
6693 hosts (not currently being processed) were also being discarded. This no
6694 longer happens. I'm not sure if this situation could ever has previously
6697 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6700 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6701 header. This is something that is recommended in a new Internet Draft, and
6702 is something that is documented as being done by Sendmail. There are two
6703 possible values. For messages generated by the autoreply transport, Exim
6706 Auto-Submitted: auto-replied
6708 whereas for all other generated messages (e.g. bounces) it adds
6710 Auto-Submitted: auto-generated
6712 63. The "personal" condition in filters now includes a test for the
6713 Auto-Submitted: header. If it contains the string "auto-" the message it
6714 not considered personal.
6716 64. Added rcpt_include_affixes as a generic transport option.
6718 65. Added queue_only_override (default true).
6720 66. Added the syslog_duplication option.
6722 67. If what should have been the first header line of a message consisted of
6723 a space followed by a colon, Exim was mis-interpreting it as a header line.
6724 It isn't of course - it is syntactically invalid and should therefore be
6725 treated as the start of the message body. The misbehaviour could have
6726 caused a number of strange effects, including loss of data in subsequent
6727 header lines, and spool format errors.
6729 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6730 client host had authenticated. This control can now be exercised by an ACL
6731 for more flexibility.
6733 69. By default, callouts do not happen when testing with -bh. There is now a
6734 variant, -bhc, which does actually run the callout code, including
6735 consulting and updating the callout cache.
6737 70. Added support for saslauthd authentication, courtesy of Alexander
6740 71. If statvfs() failed on the spool or log directories while checking their
6741 size for availability, Exim confusingly gave the error "space shortage".
6742 Furthermore, in debugging mode it crashed with a floating point exception.
6743 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6744 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6745 serious problem, Exim now writes to the main and panic logs when this
6746 happens, with details of the failure. It then refuses to accept the
6747 incoming message, giving the message "spool directory problem" or "log
6748 directory problem" with a 421 code for SMTP messages.
6750 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6751 0, 1, and 2 exist, because some OS complain for execs without them (see
6752 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6753 descriptors. However, the code omitted to check that the open succeeded,
6754 causing mysterious errors if for some reason the permissions on /dev/null
6755 got screwed. Now Exim writes a message to the main and panic logs, and
6756 bombs out if it can't open /dev/null.
6758 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6759 interact so that it is all more flexible. It is supposed to remain
6760 backwards compatible. Also added extra_local_interfaces.
6762 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6763 to bomb out with an assertion failure - to the client this appears as a
6764 connection drop. This problem occurs in the part of the code that was taken
6765 from the Samba project. Fortunately, the assertion is in a very simple
6766 function, so I have fixed this by reproducing the function inline in the
6767 one place where it is called, and arranging for authentication to fail
6768 instead of killing the process with assert().
6770 75. The SPA client code was not working when the server requested OEM rather
6771 than Unicode encoding.
6773 76. Added code to make require_files with a specific uid setting more usable in
6774 the case where statting the file as root fails - usually a non-root-mounted
6775 NFS file system. When this happens and the failure is EACCES, Exim now
6776 forks a subprocess and does the per-uid checking as the relevant uid.
6778 77. Added process_log_path.
6780 78. If log_file_path was not explicitly set, a setting of check_log_space or
6781 check_log_inodes was ignored.
6783 79. If a space check for the spool or log partitions fails, the incident is now
6784 logged. Of course, in the latter case the data may get lost...
6786 80. Added the %p formatting code to string_format() so that it can be used to
6787 print addresses in debug_print(). Adjusted all the address printing in the
6788 debugging in store.c to use %p rather than %d.
6790 81. There was a concern that a line of code in smtp_in.c could overflow a
6791 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6792 initially expressed, the concern was not well-founded, because trailing
6793 spaces are removed early. However, if the trailing spaces were followed by
6794 a NULL, they did not get removed, so the overflow was possible. Two fixes
6797 (a) I re-wrote the offending code in a cleaner fashion.
6798 (b) If an incoming SMTP command contains a NULL character, it is rejected
6801 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6802 runs initgroups(), so that if the Exim user is in any additional groups,
6803 they will be used during message reception.
6809 The change log for 4.20 and earlier releases has been archived.