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.
53 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
54 matters on fast-turnover and PID-randomising systems, which were getting
55 out-of-order delivery.
61 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
62 than -2003 did; needs libidn2 in addition to libidn.
64 JH/02 The path option on a pipe transport is now expanded before use.
66 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
67 Patch provided by "Björn", documentation fix added too.
69 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
70 missing a wire-to-host endian conversion.
72 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
73 close after a BDAT command line could be taken as a following command,
74 giving a synch failure. Fix by only checking for synch immediately
75 before acknowledging the chunk.
77 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
78 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
79 macro. Patches provided by Josh Soref.
81 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
82 Previously we did not; the RFC seems ambiguous and VRFY is not listed
83 by IANA as a service extension. However, John Klensin suggests that we
86 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
87 the dkim code may be unix-mode line endings rather than smtp wire-format
88 CRLF, so prepend a CR to any bare LF.
90 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
91 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
93 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
94 the first were themselves being wrongly included in the feed into dkim
95 processing; with most chunk sizes in use this resulted in an incorrect
96 body hash calculated value.
98 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
99 DKIM signature block, for verification. Although advised against by
100 standards it is specifically not ruled illegal.
102 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
104 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
105 missing a body hash (the bh= tag).
107 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
108 It seems that HAProxy sends the Proxy Protocol information in clear and
109 only then does a TLS startup, so do the same.
111 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
112 TCP connections (such as for Spamd) unless the daemon successfully set
113 Fast Open mode on its listening sockets. This fixes breakage seen on
114 too-old kernels or those not configured for Fast Open, at the cost of
115 requiring both directions being enabled for TFO, and TFO never being used
116 by non-daemon-related Exim processes.
118 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
119 endings, at least on the first header line. Try to canonify any that get
120 past that check, despite the cost.
122 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
123 now limited to an arbitrary five deep, while parsing addresses with the
124 strip_excess_angle_brackets option enabled.
126 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
127 instead leave the unprompted TLS handshake in socket buffer for the
128 TLS library to consume.
130 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
132 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
134 JH/16 Drop variables when they go out of scope. Memory management drops a whole
135 region in one operation, for speed, and this leaves assigned pointers
136 dangling. Add checks run only under the testsuite which checks all
137 variables at a store-reset and panics on a dangling pointer; add code
138 explicitly nulling out all the variables discovered. Fixes one known
139 bug: a transport crash, where a dangling pointer for $sending_ip_address
140 originally assigned in a verify callout, is re-used.
142 PP/06 Drop '.' from @INC in various Perl scripts.
144 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
146 PP/08 Reduce a number of compilation warnings under clang; building with
147 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
148 should be warning-free.
150 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
152 HS/01 Fix portability problems introduced by PP/08 for platforms where
153 realloc(NULL) is not equivalent to malloc() [SunOS et al].
155 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
156 chunk. This allows us to accept broken chunked messages. We need a more
157 general solution here.
159 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
160 already-broken messages in the queue.
162 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
164 JH/19 Fix reference counting bug in routing-generated-address tracking.
170 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
171 supports it and a size is available (ie. the sending peer gave us one).
173 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
174 years of being deprecated). The replacements are the ACLs
175 acl_smtp_mime and acl_not_smtp_mime.
177 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
178 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
179 or even an in-clear connection were permitted. Now, if the host lookup
180 was dnssec and dane was requested then the host is only used if the
181 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
182 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
183 if one fails this test.
184 This means that a poorly-configured remote DNS will make it incommunicado;
185 but it protects against a DNS-interception attack on it.
187 JH/04 Bug 1810: make continued-use of an open smtp transport connection
188 non-noisy when a race steals the message being considered.
190 JH/05 If main configuration option tls_certificate is unset, generate a
191 self-signed certificate for inbound TLS connections.
193 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
194 in rewrites and routers.
196 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
197 and logged a warning sing 4.83; now they are a configuration file error.
199 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
200 (lacking @domain). Apply the same qualification processing as RCPT.
202 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
204 JH/10 Support ${sha256:} applied to a string (as well as the previous
207 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
208 a cutthrough deliver is pending, as we always want to make a connection.
209 This also avoids re-routing the message when later placing the cutthrough
210 connection after a verify cache hit.
211 Do not update it with the verify result either.
213 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
214 when routing results in more than one destination address.
216 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
217 signing (which inhibits the cutthrough capability). Previously only
218 the presence of an option was tested; now an expansion evaluating as
219 empty is permissible (obviously it should depend only on data available
220 when the cutthrough connection is made).
222 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
223 the relevant preceding SMTP command did not note the pipelining mode.
225 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
226 Previously they were not counted.
228 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
229 as one having no matching records. Previously we deferred the message
230 that needed the lookup.
232 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
233 distinguished as "(=".
235 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
236 for missing MX records. Previously it only worked for missing A records.
238 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
240 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
241 after the data-go-ahead and data-ack. Patch from Jason Betts.
243 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
244 even for a "none" policy. Patch from Tony Meyer.
246 JH/22 Fix continued use of a connection for further deliveries. If a port was
247 specified by a router, it must also match for the delivery to be
250 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
251 When one of the recipients of a message was unsuitable for the connection
252 (has no matching addresses), we lost track of needing to mark it
253 deferred. As a result mail would be lost.
255 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
257 JH/25 Decoding ACL controls is now done using a binary search; the source code
258 takes up less space and should be simpler to maintain. Merge the ACL
259 condition decode tables also, with similar effect.
261 JH/26 Fix problem with one_time used on a redirect router which returned the
262 parent address unchanged. A retry would see the parent address marked as
263 delivered, so not attempt the (identical) child. As a result mail would
266 JH/27 Fix a possible security hole, wherein a process operating with the Exim
267 UID can gain a root shell. Credit to http://www.halfdog.net/ for
268 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
271 JH/28 Enable {spool,log} filesystem space and inode checks as default.
272 Main config options check_{log,spool}_{inodes,space} are now
273 100 inodes, 10MB unless set otherwise in the configuration.
275 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
276 Previously it only applied to the main-section connection policy
279 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
281 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
282 by me. Added RFC7919 DH primes as an alternative.
284 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
285 are not in the system include path.
287 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
288 GnuTLS, when a session startup failed (eg because the client disconnected)
289 Exim did stdio operations after fclose. This was exposed by a recent
290 change which nulled out the file handle after the fclose.
292 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
293 signed directly by the cert-signing cert, rather than an intermediate
294 OCSP-signing cert. This is the model used by LetsEncrypt.
296 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
298 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
299 an incoming connection.
301 HS/02 Bug 1802: Do not half-close the connection after sending a request
304 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
305 fallback to "prime256v1".
307 JH/34 SECURITY: Use proper copy of DATA command in error message.
308 Could leak key material. Remotely exploitable. CVE-2016-9963.
314 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
315 and 3.4.4 - once the server is enabled to respond to an OCSP request
316 it does even when not requested, resulting in a stapling non-aware
317 client dropping the TLS connection.
319 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
320 support variable-length bit vectors. No functional change.
322 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
323 The I= interface field on outgoing lines is now after the H= remote
324 host field, same as incoming lines. There is a separate
325 outgoing_interface log selector which allows you to disable the
328 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
329 If not running log_selector +smtp_connection the mainlog would be held
330 open indefinitely after a "too many connections" event, including to a
331 deleted file after a log rotate. Leave the per net connection logging
332 leaving it open for efficiency as that will be quickly detected by the
333 check on the next write.
335 HS/01 Bug 1671: Fix post transport crash.
336 Processing the wait-<transport> messages could crash the delivery
337 process if the message IDs didn't exist for some reason. When
338 using 'split_spool_directory=yes' the construction of the spool
339 file name failed already, exposing the same netto behaviour.
341 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
342 mime_regex ACL conditions.
344 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
345 to DSN fail messages (bounces): remote IP, remote greeting, remote response
346 to HELO, local diagnostic string.
348 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
349 log line to debug. Even when configured with a tls authenticator many
350 client connections are expected to not authenticate in this way, so
351 an authenticate fail is not an error.
353 HS/02 Add the Exim version string to the process info. This way exiwhat
354 gives some more detail about the running daemon.
356 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
357 matter for fast-change records such as DNSBLs.
359 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
360 retry record, even if constant. There may be multiple transports with
361 different interface settings and the retry behaviour needs to be kept
364 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
366 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
368 JH/10 Bug 840: fix log_defer_output option of pipe transport
370 JH/11 Bug 830: use same host for all RCPTS of a message, even under
371 hosts_randomize. This matters a lot when combined with mua_wrapper.
373 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
374 ${quote_pgsql:<string>} operator.
376 JH/13 Bug 1708: avoid misaligned access in cached lookup.
378 JH/14 Change header file name for freeradius-client. Relevant if compiling
379 with Radius support; from the Gentoo tree and checked under Fedora.
381 JH/15 Bug 1712: Introduce $prdr_requested flag variable
383 JH/16 Bug 1714: Permit an empty string as expansion result for transport
384 option transport_filter, meaning no filtering.
386 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
388 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
389 defaults to "*" (all hosts). The variable is now available when not built
390 with TLS, default unset, mainly to enable keeping the testsuite sane.
391 If a server certificate is not supplied (via tls_certificate) an error is
392 logged, and clients will find TLS connections fail on startup. Presumably
393 they will retry in-clear.
394 Packagers of Exim are strongly encouraged to create a server certificate
395 at installation time.
397 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
398 with the $config_file variable.
400 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
401 in transport context, after the attempt, and per-recipient. The latter type
402 is per host attempted. The event data is the error message, and the errno
403 information encodes the lookup type (A vs. MX) used for the (first) host,
404 and the trailing two digits of the smtp 4xx response.
406 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
407 to write to mainlog (or rejectlog, paniclog) in the window between file
408 creation and permissions/ownership being changed. Particularly affects
409 installations where exicyclog is run as root, rather than exim user;
410 result is that the running daemon panics and dies.
412 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
414 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
415 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
416 "pri" and "weight". Note that the previous implicit priority given by the
417 list order is no longer honoured.
419 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
422 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
423 by defining SUPPORT_SOCKS.
425 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
426 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
427 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
428 variables are renamed to proxy_{local,external}_{address,port}.
430 JH/27 Move Internationalisation support from Experimental to mainline, enabled
431 for a build by defining SUPPORT_I18N
433 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
434 of the query string, and make ${quote_redis:} do that quoting.
436 JH/29 Move Events support from Experimental to mainline, enabled by default
437 and removable for a build by defining DISABLE_EVENT.
439 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
441 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
442 cached by the daemon.
444 JH/32 Move Redis support from Experimental to mainline, enabled for a build
445 by defining LOOKUP_REDIS. The libhiredis library is required.
447 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
448 keys are given for lookup.
450 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
451 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
452 only supported when built with TLS support. The PolarSSL SHA routines
453 are still used when the TLS library is too old for convenient support.
455 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
456 openssl_options), for security. OpenSSL forces this from version 1.1.0
457 server-side so match that on older versions.
459 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
460 allocation for $value could be released as the expansion processing
461 concluded, but leaving the global pointer active for it.
463 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
464 and to use the domains and local_parts ACL conditions.
466 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
467 incorrectly not doubled on cutthrough transmission, hence seen as a
468 body-termination at the receiving system - resulting in truncated mails.
469 Commonly the sender saw a TCP-level error, and retransmitted the message
470 via the normal store-and-forward channel. This could result in duplicates
471 received - but deduplicating mailstores were liable to retain only the
472 initial truncated version.
474 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
476 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
478 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
479 we're in there, support oversigning also; bug 1309.
481 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
483 HS/04 Add support for keep_environment and add_environment options.
485 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
486 either intentional arithmetic overflow during PRNG, or testing config-
489 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
490 delivery resulted in actual delivery. Cancel cutthrough before DATA
493 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
494 rejects a recipient: pass the reject to the originator.
496 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
497 Many were false-positives and ignorable, but it's worth fixing the
500 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
501 for the new environment-manipulation done at startup. Move the routines
502 from being local to tls.c to being global via the os.c file.
504 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
505 an extract embedded as result-arg for a map, the first arg for extract
506 is unavailable so we cannot tell if this is a numbered or keyed
507 extraction. Accept either.
513 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
516 JH/02 The smtp transport option "multi_domain" is now expanded.
518 JH/03 The smtp transport now requests PRDR by default, if the server offers
521 JH/04 Certificate name checking on server certificates, when exim is a client,
522 is now done by default. The transport option tls_verify_cert_hostnames
523 can be used to disable this per-host. The build option
524 EXPERIMENTAL_CERTNAMES is withdrawn.
526 JH/05 The value of the tls_verify_certificates smtp transport and main options
527 default to the word "system" to access the system default CA bundle.
528 For GnuTLS, only version 3.0.20 or later.
530 JH/06 Verification of the server certificate for a TLS connection is now tried
531 (but not required) by default. The verification status is now logged by
532 default, for both outbound TLS and client-certificate supplying inbound
535 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
538 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
539 Status Notification (bounce) messages are now MIME format per RFC 3464.
540 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
541 under the control of the dsn_advertise_hosts option, and routers may
542 have a dsn_lasthop option.
544 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
545 default, modifiable by a malware= option. The list separator for
546 the options can now be changed in the usual way. Bug 68.
548 JH/10 The smtp_receive_timeout main option is now expanded before use.
550 JH/11 The incoming_interface log option now also enables logging of the
551 local interface on delivery outgoing connections.
553 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
554 if the interface and destination host and port all match.
556 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
559 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
560 Patch from Andrew Lewis.
562 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
563 now supports optional time-restrictions, weighting, and priority
564 modifiers per server. Patch originally by <rommer@active.by>.
566 JH/16 The spamd_address main option now supports a mixed list of local
567 and remote servers. Remote servers can be IPv6 addresses, and
568 specify a port-range.
570 JH/17 Bug 68: The spamd_address main option now supports an optional
571 timeout value per server.
573 JH/18 Bug 1581: Router and transport options headers_add/remove can
574 now have the list separator specified.
576 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
579 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
582 JH/21 Support for the A6 type of dns record is withdrawn.
584 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
585 rather than the verbs used.
587 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
588 from 255 to 1024 chars.
590 JH/24 Verification callouts now attempt to use TLS by default.
592 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
593 are generic router options now. The defaults didn't change.
595 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
596 Original patch from Alexander Shikoff, worked over by JH.
598 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
599 files if ZCAT_COMMAND is not executable.
601 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
603 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
605 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
606 Normally benign, it bites when the pair was led to by a CNAME;
607 modern usage is to not canonicalize the domain to a CNAME target
608 (and we were inconsistent anyway for A-only vs AAAA+A).
610 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
612 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
613 when evaluating $sender_host_dnssec.
615 JH/31 Check the HELO verification lookup for DNSSEC, adding new
616 $sender_helo_dnssec variable.
618 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
620 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
622 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
624 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
625 documented as working, but never had. Support all but $spam_report.
627 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
628 added for tls authenticator.
630 HS/03 Add perl_taintmode main config option
636 TL/01 When running the test suite, the README says that variables such as
637 no_msglog_check are global and can be placed anywhere in a specific
638 test's script, however it was observed that placement needed to be near
639 the beginning for it to behave that way. Changed the runtest perl
640 script to read through the entire script once to detect and set these
641 variables, reset to the beginning of the script, and then run through
642 the script parsing/test process like normal.
644 TL/02 The BSD's have an arc4random API. One of the functions to induce
645 adding randomness was arc4random_stir(), but it has been removed in
646 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
647 function when detected.
649 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
650 cause callback expansion.
652 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
653 syntax errors in an expansion can be treated as a string instead of
654 logging or causing an error, due to the internal use of bool_lax
655 instead of bool when processing it.
657 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
658 server certificates when making smtp deliveries.
660 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
662 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
664 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
666 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
667 Merged patch from Sebastian Wiedenroth.
669 JH/05 Fix results-pipe from transport process. Several recipients, combined
670 with certificate use, exposed issues where response data items split
671 over buffer boundaries were not parsed properly. This eventually
672 resulted in duplicates being sent. This issue only became common enough
673 to notice due to the introduction of connection certificate information,
674 the item size being so much larger. Found and fixed by Wolfgang Breyha.
676 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
677 size buffer was used, resulting in syntax errors when an expansion
680 JH/07 Add support for directories of certificates when compiled with a GnuTLS
681 version 3.3.6 or later.
683 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
684 is EXPERIMENTAL_EVENT, the main-configuration and transport options
685 both become "event_action", the variables become $event_name, $event_data
686 and $event_defer_errno. There is a new variable $verify_mode, usable in
687 routers, transports and related events. The tls:cert event is now also
688 raised for inbound connections, if the main configuration event_action
691 TL/06 In test suite, disable OCSP for old versions of openssl which contained
692 early OCSP support, but no stapling (appears to be less than 1.0.0).
694 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
695 server certificate names available under the smtp transport option
696 "tls_verify_cert_hostname" now do not permit multi-component wildcard
699 JH/10 Time-related extraction expansions from certificates now use the main
700 option "timezone" setting for output formatting, and are consistent
701 between OpenSSL and GnuTLS compilations. Bug 1541.
703 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
704 encoded parameter in the incoming message. Bug 1558.
706 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
707 include certificate info, eximon was claiming there were spoolfile
710 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
712 JH/14 Log delivery-related information more consistently, using the sequence
713 "H=<name> [<ip>]" wherever possible.
715 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
716 are problematic for Debian distribution, omit them from the release
719 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
721 JH/16 Fix string representation of time values on 64bit time_t architectures.
724 JH/17 Fix a null-indirection in certextract expansions when a nondefault
725 output list separator was used.
730 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
731 checkers that were complaining about end of non-void function with no
734 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
735 This was a regression introduced in 4.83 by another bugfix.
737 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
739 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
740 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
746 TF/01 Correctly close the server side of TLS when forking for delivery.
748 When a message was received over SMTP with TLS, Exim failed to clear up
749 the incoming connection properly after forking off the child process to
750 deliver the message. In some situations the subsequent outgoing
751 delivery connection happened to have the same fd number as the incoming
752 connection previously had. Exim would try to use TLS and fail, logging
753 a "Bad file descriptor" error.
755 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
756 utilities have not been installed.
758 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
759 temporary space as the ACL may create new global variables.
761 TL/01 LDAP support uses per connection or global context settings, depending
762 upon the detected version of the libraries at build time.
764 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
765 to extract and use the src ip:port in logging and expansions as if it
766 were a direct connection from the outside internet. PPv2 support was
767 updated based on HAProxy spec change in May 2014.
769 JH/02 Add ${listextract {number}{list}{success}{fail}}.
771 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
772 Properly escape header and check for NULL return.
774 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
777 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
779 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
780 characters in header names, implemented as a verify condition.
781 Contributed by Michael Fischer v. Mollard.
783 TL/05 Rename SPF condition results err_perm and err_temp to standardized
784 results permerror and temperror. Previous values are deprecated but
785 still accepted. In a future release, err_perm and err_temp will be
786 completely removed, which will be a backward incompatibility if the
787 ACL tests for either of these two old results. Patch contributed by
788 user bes-internal on the mailing list.
790 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
792 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
793 selectors, in both main and reject logs.
795 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
798 JH/07 Add malware type "sock" for talking to simple daemon.
800 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
802 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
803 routers/transports under cutthrough routing.
805 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
806 numbers. Touch up "bool" conditional to keep the same definition.
808 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
810 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
812 JH/12 Expand items in router/transport headers_add or headers_remove lists
813 individually rather than the list as a whole. Bug 1452.
815 Required for reasonable handling of multiple headers_ options when
816 they may be empty; requires that headers_remove items with embedded
817 colons must have them doubled (or the list-separator changed).
819 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
820 view the policy declared in the DMARC record. Currently, $dmarc_status
821 is a combined value of both the record presence and the result of the
824 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
826 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
827 dnslookup router and the smtp transport (applying to the forward
830 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
831 of ldap servers used for a specific lookup. Patch provided by Heiko
834 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
835 New variable $lookup_dnssec_authenticated for observability.
837 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
838 Patch submitted by Lars Timman.
840 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
842 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
843 Requires trusted mode and valid format message id, aborts otherwise.
844 Patch contributed by Heiko Schlichting.
846 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
847 certextract with support for various fields. Bug 1358.
849 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
850 is requested by default, modifiable by smtp transport option
853 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
854 operate on certificate variables to give certificate fingerprints
855 Also new ${sha256:cert_variable}.
857 JH/23 The PRDR feature is moved from being Experimental into the mainline.
859 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
860 Christian Aistleitner.
862 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
864 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
865 file. Patch from Wolfgang Breyha.
867 JH/25 Expand the coverage of the delivery $host and $host_address to
868 client authenticators run in verify callout. Bug 1476.
870 JH/26 Port service names are now accepted for tls_on_connect_ports, to
871 align with daemon_smtp_ports. Bug 72.
873 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
874 support and error reporting did not work properly.
876 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
877 and is readable. Patch from Andrew Colin Kissa.
879 TL/14 Enhance documentation of ${run expansion and how it parses the
880 commandline after expansion, particularly in the case when an
881 unquoted variable expansion results in an empty value.
883 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
885 PP/02 Fix internal collision of T_APL on systems which support RFC3123
886 by renaming away from it. Addresses GH issue 15, reported by
889 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
891 TL/15 SECURITY: prevent double expansion in math comparison functions
892 (can expand unsanitized data). Not remotely exploitable.
899 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
901 PP/02 Make -n do something, by making it not do something.
902 When combined with -bP, the name of an option is not output.
904 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
907 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
908 $sender_host_name and config options to manage this, and basic check
911 PP/05 DSCP support for outbound connections and control modifier for inbound.
913 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
914 (Only plugin which currently uses this is kerberos4, which nobody should
915 be using, but we should make it available and other future plugins might
916 conceivably use it, even though it would break NAT; stuff *should* be
917 using channel bindings instead).
919 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
920 name; added for Sendmail compatibility; requires admin caller.
921 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
922 just ignore it); requires trusted caller.
923 Also parse but ignore: -Ac -Am -X<logfile>
926 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
928 TL/02 Add +smtp_confirmation as a default logging option.
930 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
931 Patch by Magnus Holmgren from 2007-02-20.
933 TL/04 Bugzilla 1281 - Spec typo.
934 Bugzilla 1283 - Spec typo.
935 Bugzilla 1290 - Spec grammar fixes.
937 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
939 TL/06 Add Experimental DMARC support using libopendmarc libraries.
941 TL/07 Fix an out of order global option causing a segfault. Reported to dev
942 mailing list by by Dmitry Isaikin.
944 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
946 JH/02 Support "G" suffix to numbers in ${if comparisons.
948 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
950 NM/01 Bugzilla 1197 - Spec typo
951 Bugzilla 1196 - Spec examples corrections
953 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
955 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
956 gnutls_enable_pkcs11, but renamed to more accurately indicate its
959 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
960 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
962 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
963 "acl {{name}{arg}...}", and optional args on acl condition
966 JH/05 Permit multiple router/transport headers_add/remove lines.
968 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
970 JH/07 Avoid using a waiting database for a single-message-only transport.
971 Performance patch from Paul Fisher. Bugzilla 1262.
973 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
976 JH/09 Add $headers_added variable, with content from use of ACL modifier
977 add_header (but not yet added to the message). Bugzilla 199.
979 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
980 Pulled from Bugzilla 817 by Wolfgang Breyha.
982 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
984 (nb: this is the same fix as in Exim 4.80.1)
986 JH/11 Add A= logging on delivery lines, and a client_set_id option on
989 JH/12 Add optional authenticated_sender logging to A= and a log_selector
992 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
994 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
995 advertise SMTP AUTH mechanism to us, instead of a generic
996 protocol violation error. Also, make Exim more robust to bad
997 data from the Dovecot auth socket.
999 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1001 When a queue runner is handling a message, Exim first routes the
1002 recipient addresses, during which it prunes them based on the retry
1003 hints database. After that it attempts to deliver the message to
1004 any remaining recipients. It then updates the hints database using
1007 So if a recipient address works intermittently, it can get repeatedly
1008 deferred at routing time. The retry hints record remains fresh so the
1009 address never reaches the final cutoff time.
1011 This is a fairly common occurrence when a user is bumping up against
1012 their storage quota. Exim had some logic in its local delivery code
1013 to deal with this. However it did not apply to per-recipient defers
1014 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1016 This change adds a proper retry rule check during routing so that the
1017 final cutoff time is checked against the message's age. We only do
1018 this check if there is an address retry record and there is not a
1019 domain retry record; this implies that previous attempts to handle
1020 the address had the retry_use_local_parts option turned on. We use
1021 this as an approximation for the destination being like a local
1022 delivery, as in LMTP.
1024 I suspect this new check makes the old local delivery cutoff check
1025 redundant, but I have not verified this so I left the code in place.
1027 TF/02 Correct gecos expansion when From: is a prefix of the username.
1029 Test 0254 submits a message to Exim with the header
1033 When I ran the test suite under the user fanf2, Exim expanded
1034 the header to contain my full name, whereas it should have added
1035 a Resent-Sender: header. It erroneously treats any prefix of the
1036 username as equal to the username.
1038 This change corrects that bug.
1040 GF/01 DCC debug and logging tidyup
1041 Error conditions log to paniclog rather than rejectlog.
1042 Debug lines prefixed by "DCC: " to remove any ambiguity.
1044 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1046 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1047 Bug spotted by Jeremy Harris; was flawed since initial commit.
1048 Would have resulted in OCSP responses post-SNI triggering an Exim
1049 NULL dereference and crash.
1051 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1053 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1054 Bug detection, analysis and fix by Samuel Thibault.
1055 Bugzilla 1331, Debian bug #698092.
1057 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1059 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1060 Server implementation by Todd Lyons, client by JH.
1061 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1062 config variable "prdr_enable" controls whether the server
1063 advertises the facility. If the client requests PRDR a new
1064 acl_data_smtp_prdr ACL is called once for each recipient, after
1065 the body content is received and before the acl_smtp_data ACL.
1066 The client is controlled by both of: a hosts_try_prdr option
1067 on the smtp transport, and the server advertisement.
1068 Default client logging of deliveries and rejections involving
1069 PRDR are flagged with the string "PRDR".
1071 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1072 fclose(). Diagnosis by Todd Lyons.
1074 PP/17 Update configure.default to handle IPv6 localhost better.
1075 Patch by Alain Williams (plus minor tweaks).
1078 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1079 This is now consistent with GnuTLS, and is now documented: the
1080 previous undocumented portable approach to treating the option as
1081 unset was to force an expansion failure. That still works, and
1082 an empty string is now equivalent.
1084 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1085 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1086 not performing validation itself.
1088 PP/20 Added force_command boolean option to pipe transport.
1089 Patch from Nick Koston, of cPanel Inc.
1091 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1094 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1096 PP/21 Fix eximon continuous updating with timestamped log-files.
1097 Broken in a format-string cleanup in 4.80, missed when I repaired the
1098 other false fix of the same issue.
1099 Report and fix from Heiko Schlichting.
1102 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1103 Report from Prashanth Katuri.
1105 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1106 It's SecureTransport, so affects any MacOS clients which use the
1107 system-integrated TLS libraries, including email clients.
1109 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1110 using a MIME ACL for non-SMTP local injection.
1111 Report and assistance in diagnosis by Warren Baker.
1113 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1115 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1117 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1118 last id that failed so it may be referenced in subsequent ACL's.
1120 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1123 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1124 ldap library initialization, allowing self-signed CA's to be
1125 used. Also properly sets require_cert option later in code by
1126 using NULL (global ldap config) instead of ldap handle (per
1127 session). Bug diagnosis and testing by alxgomz.
1129 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1130 the src/util/ subdirectory.
1132 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1133 renamed to Transport Post Delivery Action by Jeremy Harris, as
1136 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1137 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1138 redis_servers = needs to be configured which will be used by the redis
1139 lookup. Patch from Warren Baker, of The Packet Hub.
1141 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1143 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1144 hostname or reverse DNS when processing a host list. Used suggestions
1145 from multiple comments on this bug.
1147 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1149 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1150 Missed a few lines, added it to make the runtest require no keyboard
1153 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1154 contains upper case chars. Make router use caseful_local_part.
1156 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1157 support when GnuTLS has been built with p11-kit.
1163 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1165 This, or similar/improved, will also be change PP/11 of 4.82.
1171 PP/01 Handle short writes when writing local log-files.
1172 In practice, only affects FreeBSD (8 onwards).
1173 Bugzilla 1053, with thanks to Dmitry Isaikin.
1175 NM/01 Bugzilla 949 - Documentation tweak
1177 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1180 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1182 PP/02 Implemented gsasl authenticator.
1184 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1186 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1187 `pkg-config foo` for cflags/libs.
1189 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1190 with rest of GSASL and with heimdal_gssapi.
1192 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1193 `pkg-config foo` for cflags/libs for the TLS implementation.
1195 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1196 properties get this fed in as external SSF. A number of robustness
1197 and debugging improvements to the cyrus_sasl authenticator.
1199 PP/08 cyrus_sasl server now expands the server_realm option.
1201 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1202 Patch by Jeremy Harris.
1204 PP/10 Added dbmjz lookup type.
1206 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1208 PP/12 MAIL args handles TAB as well as SP, for better interop with
1209 non-compliant senders.
1210 Analysis and variant patch by Todd Lyons.
1212 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1213 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1214 Patch from Dirk Mueller <dmueller@suse.com>
1216 PP/13 tls_peerdn now print-escaped for spool files.
1217 Observed some $tls_peerdn in wild which contained \n, which resulted
1218 in spool file corruption.
1220 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1221 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1222 or write after TLS renegotiation, which otherwise led to messages
1225 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1226 as a tracking header (ie: a signed header comes before the signature).
1227 Patch from Wolfgang Breyha.
1229 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1230 comma-sep list; embedded commas doubled.
1232 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1234 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1236 Report and patch from Dmitry Banschikov.
1238 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1239 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1240 failures. We appear to now support TLS1.1+ with Exim.
1242 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1243 lets Exim select keys and certificates based upon TLS SNI from client.
1244 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1245 before an outbound SMTP session. New log_selector, +tls_sni.
1247 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1248 NULL dereference. Report and patch from Alun Jones.
1250 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1251 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1252 Not seeing resolver debug output on NetBSD, but suspect this is a
1253 resolver implementation change.
1255 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1256 Left warnings. Added "eximon gdb" invocation mode.
1258 PP/21 Defaulting "accept_8bitmime" to true, not false.
1260 PP/22 Added -bw for inetd wait mode support.
1262 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1263 locate the relevant includes and libraries. Made this the default.
1265 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1266 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1268 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1269 This may cause build issues on older platforms.
1271 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1272 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1273 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1274 Added SNI support via GnuTLS too.
1275 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1277 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1279 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1280 Applied second patch from Janne, implementing suggestion to default
1281 multiple-strings-in-record handling to match SPF spec.
1283 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1285 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1286 read-only, out of scope).
1287 Patch from Wolfgang Breyha, report from Stuart Northfield.
1289 PP/29 Fix three issues highlighted by clang analyser static analysis.
1290 Only crash-plausible issue would require the Cambridge-specific
1291 iplookup router and a misconfiguration.
1292 Report from Marcin Mirosław.
1294 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1296 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1297 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1298 As part of this, removing so much warning spew let me fix some minor
1299 real issues in debug logging.
1301 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1302 assignment on my part. Fixed.
1304 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1305 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1306 Janne Snabb (who went above and beyond: thank you).
1308 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1309 string otherwise requires a connection and a bunch more work and it's
1310 relatively easy to get wrong. Should also expose TLS library linkage
1313 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1314 64-bit ${eval} (JH/03).
1316 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1317 GNU libc to support some of the 64-bit stuff, should not lead to
1318 conflicts. Defined before os.h is pulled in, so if a given platform
1319 needs to override this, it can.
1321 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1322 protection layer was required, which is not implemented.
1323 Bugzilla 1254, patch from Wolfgang Breyha.
1325 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1326 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1327 tls_dhparam take prime identifiers. Also unbreak combination of
1328 OpenSSL+DH_params+TLSSNI.
1330 PP/39 Disable SSLv2 by default in OpenSSL support.
1336 PP/01 Solaris build fix for Oracle's LDAP libraries.
1337 Bugzilla 1109, patch from Stephen Usher.
1339 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1341 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1344 TF/02 Fix a couple more cases where we did not log the error message
1345 when unlink() failed. See also change 4.74-TF/03.
1347 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1348 lock up or crash if it happened to be inside a call to libc when it
1349 got a SIGUSR1 from exiwhat.
1351 The SIGUSR1 handler appends the current process status to the process
1352 log which is later printed by exiwhat. It used to use the general
1353 purpose logging code to do this, but several functions it calls are
1354 not safe for signals.
1356 The new output code in the SIGUSR1 handler is specific to the process
1357 log, and simple enough that it's easy to inspect for signal safety.
1358 Removing some special cases also simplifies the general logging code.
1359 Removing the spurious timestamps from the process log simplifies
1362 TF/04 Improved ratelimit ACL condition.
1364 The /noupdate option has been deprecated in favour of /readonly which
1365 has clearer semantics. The /leaky, /strict, and /readonly update modes
1366 are mutually exclusive. The update mode is no longer included in the
1367 database key; it just determines when the database is updated. (This
1368 means that when you upgrade Exim will forget old rate measurements.)
1370 Exim now checks that the per_* options are used with an update mode that
1371 makes sense for the current ACL. For example, when Exim is processing a
1372 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1373 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1374 must specify per_mail/readonly. If you omit the update mode it defaults to
1375 /leaky where that makes sense (as before) or /readonly where required.
1377 The /noupdate option is now undocumented but still supported for
1378 backwards compatibility. It is equivalent to /readonly except that in
1379 ACLs where /readonly is required you may specify /leaky/noupdate or
1380 /strict/noupdate which are treated the same as /readonly.
1382 A useful new feature is the /count= option. This is a generalization
1383 of the per_byte option, so that you can measure the throughput of other
1384 aggregate values. For example, the per_byte option is now equivalent
1385 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1387 The per_rcpt option has been generalized using the /count= mechanism
1388 (though it's more complicated than the per_byte equivalence). When it is
1389 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1390 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1391 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1392 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1393 Note that using per_rcpt with a non-readonly update mode in more than
1394 one ACL will cause the recipients to be double-counted. (The per_mail
1395 and per_byte options don't have this problem.)
1397 The handling of very low rates has changed slightly. If the computed rate
1398 is less than the event's count (usually one) then this event is the first
1399 after a long gap. In this case the rate is set to the same as this event's
1400 count, so that the first message of a spam run is counted properly.
1402 The major new feature is a mechanism for counting the rate of unique
1403 events. The new per_addr option counts the number of different
1404 recipients that someone has sent messages to in the last time period. It
1405 behaves like per_rcpt if all the recipient addresses are different, but
1406 duplicate recipient addresses do not increase the measured rate. Like
1407 the /count= option this is a general mechanism, so the per_addr option
1408 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1409 example, measure the rate that a client uses different sender addresses
1410 with the options per_mail/unique=$sender_address. There are further
1411 details in the main documentation.
1413 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1415 TF/06 Removed a few PCRE remnants.
1417 TF/07 Automatically extract Exim's version number from tags in the git
1418 repository when doing development or release builds.
1420 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1421 Bugzilla 879. Patch from Paul Fisher.
1423 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1424 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1427 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1429 PP/05 Variable $av_failed, true if the AV scanner deferred.
1430 Bugzilla 1078. Patch from John Horne.
1432 PP/06 Stop make process more reliably on build failure.
1433 Bugzilla 1087. Patch from Heiko Schlittermann.
1435 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1436 Bugzilla 1089. Patch from Heiko Schlittermann.
1438 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1439 Bugzilla 1131. Patch from Holger Weiß.
1441 PP/09 Handle IPv6 addresses with SPF.
1442 Bugzilla 860. Patch from Wolfgang Breyha.
1444 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1446 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1449 PP/11 match_* no longer expand right-hand-side by default.
1450 New compile-time build option, EXPAND_LISTMATCH_RHS.
1451 New expansion conditions, "inlist", "inlisti".
1453 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1455 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1457 PP/14 fix log_write() format string regression from TF/03.
1458 Bugzilla 1152. Patch from Dmitry Isaikin.
1464 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1466 PP/02 Harmonised TLS library version reporting; only show if debugging.
1467 Layout now matches that introduced for other libraries in 4.74 PP/03.
1469 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1471 PP/04 New "dns_use_edns0" global option.
1473 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1476 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1477 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1479 TK/01 Updated PolarSSL code to 0.14.2.
1480 Bugzilla 1097. Patch from Andreas Metzler.
1482 PP/07 Catch divide-by-zero in ${eval:...}.
1483 Fixes bugzilla 1102.
1485 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1488 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1489 format-string attack -- SECURITY: remote arbitrary code execution.
1491 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1492 time unintentionally subject to list matching rules, letting the header
1493 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1494 arbitrary string expansion). This allowed for information disclosure.
1496 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1497 INT_MIN/-1 -- value coerced to INT_MAX.
1503 NM/01 Workaround for PCRE version dependency in version reporting
1506 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1507 This fixes portability to compilers other than gcc, notably
1508 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1510 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1511 makefiles for portability to HP-UX and POSIX correctness.
1513 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1514 Also via indented variable definition in the Makefile.
1515 (Debugging by Oliver Heesakkers).
1517 PP/02 Restore caching of spamd results with expanded spamd_address.
1518 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1520 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1521 Improves build reliability. Fix from: Frank Elsner
1523 NM/02 Fix wide character breakage in the rfc2047 coding
1524 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1526 NM/03 Allow underscore in dnslist lookups
1527 Fixes bug 1026. Patch from Graeme Fowler
1529 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1530 Code patches from Adam Ciarcinski of NetBSD.
1532 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1535 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1536 is logged, to avoid truncation. Patch from John Horne.
1538 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1539 Patch from Jakob Hirsch.
1541 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1542 SQL string expansion failure details.
1543 Patch from Andrey Oktyabrski.
1545 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1546 Patch from Simon Arlott.
1548 PP/09 New lookups functionality failed to compile on old gcc which rejects
1549 extern declarations in function scope.
1550 Patch from Oliver Fleischmann
1552 PP/10 Use sig_atomic_t for flags set from signal handlers.
1553 Check getgroups() return and improve debugging.
1554 Fixed developed for diagnosis in bug 927 (which turned out to be
1557 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1558 Patch from Mark Zealey.
1560 PP/12 Bugzilla 1056: Improved spamd server selection.
1561 Patch from Mark Zealey.
1563 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1564 Based on patch from Heiko Schlittermann.
1566 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1567 Patch from Uwe Doering, sign-off by Michael Haardt.
1569 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1570 variable declaration deep within a block. Bug and patch from
1573 PP/15 lookups-Makefile IRIX compatibility coercion.
1575 PP/16 Make DISABLE_DKIM build knob functional.
1577 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1578 Patch by Simon Arlott
1580 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1581 variable argument macros. Our copy now differs from upstream.
1587 TF/01 Failure to get a lock on a hints database can have serious
1588 consequences so log it to the panic log.
1590 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1591 controlled using the smtp_confirmation log selector.
1593 TF/03 Include the error message when we fail to unlink a spool file.
1595 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1596 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1597 for maintaining out-of-tree patches for some time.
1599 PP/01 Bugzilla 139: Documentation and portability issues.
1600 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1601 Handle per-OS dynamic-module compilation flags.
1603 PP/02 Let /dev/null have normal permissions.
1604 The 4.73 fixes were a little too stringent and complained about the
1605 permissions on /dev/null. Exempt it from some checks.
1606 Reported by Andreas M. Kirchwitz.
1608 PP/03 Report version information for many libraries, including
1609 Exim version information for dynamically loaded libraries. Created
1610 version.h, now support a version extension string for distributors
1611 who patch heavily. Dynamic module ABI change.
1613 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1614 privilege escalation vulnerability whereby the Exim run-time user
1615 can cause root to append content of the attacker's choosing to
1618 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1621 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1622 If dropping privileges for untrusted macros, we disabled normal logging
1623 on the basis that it would fail; for the Exim run-time user, this is not
1624 the case, and it resulted in successful deliveries going unlogged.
1625 Fixed. Reported by Andreas Metzler.
1631 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1632 only prepend for the Resent-* case. Fixes regression introduced in
1633 Exim 4.70 by NM/22 for Bugzilla 607.
1635 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1636 increasing numbers of administrators be bitten by this.
1638 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1640 PP/03 Bugzilla 994: added openssl_options main configuration option.
1642 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1644 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1646 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1648 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1649 without a peer certificate, leading to a segfault because of an
1650 assumption that peers always have certificates. Be a little more
1651 paranoid. Problem reported by Martin Tscholak.
1653 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1654 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1655 NB: ClamAV planning to remove STREAM in "middle of 2010".
1656 CL also introduces -bmalware, various -d+acl logging additions and
1657 more caution in buffer sizes.
1659 PP/09 Implemented reverse_ip expansion operator.
1661 PP/10 Bugzilla 937: provide a "debug" ACL control.
1663 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1665 PP/12 Bugzilla 973: Implement --version.
1667 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1669 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1671 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1673 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1674 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1675 ignore trailing whitespace.
1677 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1679 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1682 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1683 Notification from Dr Andrew Aitchison.
1685 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1686 ExtendedDetectionInfo response format.
1687 Notification from John Horne.
1689 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1692 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1693 XSL and documented dependency on system catalogs, with examples of how
1696 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1699 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1700 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1701 configuration file which is writeable by the Exim user or group.
1703 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1704 of configuration files to cover files specified with the -C option if
1705 they are going to be used with root privileges, not just the default
1708 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1709 option (effectively making it always true).
1711 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1712 files to be used while preserving root privileges.
1714 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1715 that rogue child processes cannot use them.
1717 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1718 run-time user, instead of root.
1720 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1721 Exim run-time user without dropping privileges.
1723 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1724 result string, instead of calling string_vformat() twice with the same
1727 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1728 for other users. Others should always drop root privileges if they use
1729 -C on the command line, even for a whitelisted configure file.
1731 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1733 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1739 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1740 $data_path, and $header_path variables; fixed documentation bugs and
1743 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1744 exipick to access non-standard spools, including the "frozen" queue
1747 NM/01 Bugzilla 965: Support mysql stored procedures.
1748 Patch from Alain Williams
1750 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1752 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1753 Patch from Andreas Metzler
1755 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1756 Patch from Kirill Miazine
1758 NM/05 Bugzilla 671: Added umask to procmail example.
1760 JJ/03 installed exipick 20100323.0, fixing doc bug
1762 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1763 directory. Notification and patch from Dan Rosenberg.
1765 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1767 TK/02 Improve log output when DKIM signing operation fails.
1769 MH/01 Treat the transport option dkim_domain as a colon separated
1770 list, not as a single string, and sign the message with each element,
1771 omitting multiple occurences of the same signer.
1773 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1774 Bugzilla 985, 986. Patch by Simon Arlott
1776 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1777 Patch by Simon Arlott
1779 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1780 MBX locking. Notification from Dan Rosenberg.
1786 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1788 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1790 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1792 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1794 NM/04 Bugzilla 915: Flag broken perl installation during build.
1800 TK/01 Added patch by Johannes Berg that expands the main option
1801 "spamd_address" if it starts with a dollar sign.
1803 TK/02 Write list of recipients to X-Envelope-Sender header when building
1804 the mbox-format spool file for content scanning (suggested by Jakob
1807 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1808 (http://www.dcc-servers.net/) support via dccifd. Activated by
1809 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1811 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1812 by Mark Daniel Reidel <mr@df.eu>.
1814 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1815 When building exim an external PCRE library is now needed -
1816 PCRE is a system library on the majority of modern systems.
1817 See entry on PCRE_LIBS in EDITME file.
1819 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1820 conversation. Added nologin parameter to request.
1821 Patch contributed by Kirill Miazine.
1823 TF/01 Do not log submission mode rewrites if they do not change the address.
1825 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1827 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1828 log files in place. Contributed by Roberto Lima.
1830 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1832 TF/03 Bugzilla 615: When checking the local_parts router precondition
1833 after a local_part_suffix or local_part_prefix option, Exim now
1834 does not use the address's named list lookup cache, since this
1835 contains cached lookups for the whole local part.
1837 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1838 Robert Millan. Documentation is in experimental-spec.txt.
1840 TF/04 Bugzilla 668: Fix parallel build (make -j).
1842 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1844 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1845 Patch provided by Jan Srzednicki.
1847 TF/05 Leading white space used to be stripped from $spam_report which
1848 wrecked the formatting. Now it is preserved.
1850 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1851 that they are available at delivery time.
1853 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1855 TF/08 TLS error reporting now respects the incoming_interface and
1856 incoming_port log selectors.
1858 TF/09 Produce a more useful error message if an SMTP transport's hosts
1859 setting expands to an empty string.
1861 NM/06 Bugzilla 744: EXPN did not work under TLS.
1862 Patch provided by Phil Pennock.
1864 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1865 Patch provided by Richard Godbee.
1867 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1868 acl_smtp_notquit, added index entry.
1870 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1871 Patch provided by Eugene Bujak.
1873 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1874 accept(). Patch provided by Maxim Dounin.
1876 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1877 Patch provided by Phil Pennock.
1879 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1881 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1882 Patch provided by Brad "anomie" Jorsch.
1884 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1885 Patch provided by Dean Brooks.
1887 TK/05 Add native DKIM support (does not depend on external libraries).
1889 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1890 Patch provided by Graeme Fowler.
1892 NM/16 Bugzilla 851: Documentation example syntax fix.
1894 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1896 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1899 NM/19 Bugzilla 745: TLS version reporting.
1900 Patch provided by Phil Pennock.
1902 NM/20 Bugzilla 167: bool: condition support.
1903 Patch provided by Phil Pennock.
1905 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1906 clients. Patch provided by Phil Pennock.
1908 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1909 Patch provided by Brad "anomie" Jorsch.
1911 NM/23 Bugzilla 687: Fix misparses in eximstats.
1912 Patch provided by Heiko Schlittermann.
1914 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1915 Patch provided by Heiko Schlittermann.
1917 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1918 plus update to original patch.
1920 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1922 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1923 Patch provided by David Brownlee.
1925 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1927 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1929 NM/30 Bugzilla 888: TLS documentation bugfixes.
1931 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1933 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1934 Unlike the original bugzilla I have changed all shell scripts in src tree.
1936 NM/33 Bugzilla 898: Transport filter timeout fix.
1937 Patch by Todd Rinaldo.
1939 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1940 Patch by Serge Demonchaux.
1942 NM/35 Bugzilla 39: Base64 decode bug fixes.
1943 Patch by Jakob Hirsch.
1945 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1947 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1949 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1951 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1957 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1958 ALT-N's libdkim that I have put here:
1959 http://duncanthrax.net/exim-experimental/
1961 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1962 were called 'true' and it seems that C99 defines that as a reserved
1963 keyword to be used with 'bool' variable types. That means you could
1964 not include C99-style headers which use bools without triggering
1965 build errors in sieve.c.
1967 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1968 as mailq or other aliases. Changed the --help handling significantly
1969 to do whats expected. exim_usage() emits usage/help information.
1971 SC/01 Added the -bylocaldomain option to eximstats.
1973 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1975 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1977 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1983 PH/01 Another patch from the Sieve maintainer.
1985 PH/02 When an IPv6 address is converted to a string for single-key lookup
1986 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1987 dots are used instead of colons so that keys in lsearch files need not
1988 contain colons. This was done some time before quoting was made available
1989 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1990 (notated using the quote facility) so as to distinguish them from IPv4
1991 keys. This meant that lookups for IP addresses in host lists did not work
1992 for iplsearch lookups.
1994 This has been fixed by arranging for IPv6 addresses to be expressed with
1995 colons if the lookup type is iplsearch. This is not incompatible, because
1996 previously such lookups could never work.
1998 The situation is now rather anomalous, since one *can* have colons in
1999 ordinary lsearch keys. However, making the change in all cases is
2000 incompatible and would probably break a number of configurations.
2002 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2005 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2006 conversion specification without a maximum field width, thereby enabling
2007 a rogue spamd server to cause a buffer overflow. While nobody in their
2008 right mind would setup Exim to query an untrusted spamd server, an
2009 attacker that gains access to a server running spamd could potentially
2010 exploit this vulnerability to run arbitrary code as the Exim user.
2012 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2013 $primary_hostname instead of what libspf2 thinks the hosts name is.
2015 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2016 a directory entry by the name of the lookup key. Previously, if a
2017 symlink pointed to a non-existing file or a file in a directory that
2018 Exim lacked permissions to read, a lookup for a key matching that
2019 symlink would fail. Now it is enough that a matching directory entry
2020 exists, symlink or not. (Bugzilla 503.)
2022 PH/03 The body_linecount and body_zerocount variables are now exported in the
2025 PH/04 Added the $dnslist_matched variable.
2027 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2028 This means they are set thereafter only if the connection becomes
2031 PH/06 Added the client_condition to authenticators so that some can be skipped
2032 by clients under certain conditions.
2034 PH/07 The error message for a badly-placed control=no_multiline_responses left
2035 "_responses" off the end of the name.
2037 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2039 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2040 (without spaces) instead of just copying the configuration text.
2042 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2044 PH/11 Added $max_received_linelength.
2046 PH/12 Added +ignore_defer and +include_defer to host lists.
2048 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2049 way in which PCRE > 7.0 is built.
2051 PH/14 Implemented queue_only_load_latch.
2053 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2054 MAIL command. The effect was to mangle the value on 64-bit systems.
2056 PH/16 Another patch from the Sieve maintainer.
2058 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2060 PH/18 If a system quota error occurred while trying to create the file for
2061 a maildir delivery, the message "Mailbox is full" was not appended to the
2062 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2063 only to a quota excession during the actual writing of the file.
2065 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2066 characters?) which causes problems in log lines. The DN values are now
2067 passed through string_printing() before being added to log lines.
2069 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2070 and InterBase are left for another time.)
2072 PH/21 Added message_body_newlines option.
2074 PH/22 Guard against possible overflow in moan_check_errorcopy().
2076 PH/23 POSIX allows open() to be a macro; guard against that.
2078 PH/24 If the recipient of an error message contained an @ in the local part
2079 (suitably quoted, of course), incorrect values were put in $domain and
2080 $local_part during the evaluation of errors_copy.
2086 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2087 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2090 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2091 issue a MAIL command.
2093 PH/02 In an ACL statement such as
2095 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2097 if a client was not listed at all, or was listed with a value other than
2098 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2099 the condition was not true (as it should be), so access was not denied.
2100 The bug was that the ! inversion was incorrectly passed on to the second
2101 item. This has been fixed.
2103 PH/03 Added additional dnslists conditions == and =& which are different from
2104 = and & when the dns lookup returns more than one IP address.
2106 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2107 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2109 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2110 FSYNC, which compiles an option called disable_fsync that allows for
2111 bypassing fsync(). The documentation is heavily laced with warnings.
2113 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2115 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2116 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2117 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2118 including adding "make clean"; (3) Added -fPIC when compiling the test
2119 dynamically loaded module, to get rid of a warning.
2121 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2122 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2123 = 0s. The bug is otherwise harmless.
2125 PH/07 There was a bug in the dovecot authenticator such that the value of
2126 $auth1 could be overwritten, and so not correctly preserved, after a
2127 successful authentication. This usually meant that the value preserved by
2128 the server_setid option was incorrect.
2130 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2132 PH/09 Installed PCRE release 7.0.
2134 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2135 run for batched SMTP input. It is now run at the start of every message
2136 in the batch. While fixing this I discovered that the process information
2137 (output by running exiwhat) was not always getting set for -bs and -bS
2138 input. This is fixed, and it now also says "batched" for BSMTP.
2140 PH/11 Added control=no_pipelining.
2142 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2143 patch, slightly modified), and move the expansion of helo_data till after
2144 the connection is made in the smtp transport (so it can use these
2147 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2149 PH/14 Added log_selector = +pid.
2151 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2153 PH/16 Add ${if forany and ${if forall.
2155 PH/17 Added dsn_from option to vary the From: line in DSNs.
2157 PH/18 Flush SMTP output before performing a callout, unless control =
2158 no_callout_flush is set.
2160 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2161 was true (the default) a successful delivery failed to delete the retry
2162 item, thus causing premature timeout of the address. The bug is now
2165 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2167 PH/21 Long custom messages for fakedefer and fakereject are now split up
2168 into multiline responses in the same way that messages for "deny" and
2169 other ACL rejections are.
2171 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2172 with slight modification.
2174 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2175 draft, changing the syntax and factoring some duplicate code".
2177 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2178 for deliveries of the second and subsequent messages over the same SMTP
2181 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2182 ${reduce, with only minor "tidies".
2184 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2186 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2187 expansion side effects.
2189 PH/27 When a message times out after an over-quota error from an Exim-imposed
2190 quota, the bounce message says "mailbox is full". This message was not
2191 being given when it was a system quota that was exceeded. It now should
2194 MH/03 Made $recipients available in local_scan(). local_scan() already has
2195 better access to the recipient list through recipients_list[], but
2196 $recipients can be useful in postmaster-provided expansion strings.
2198 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2199 in the case of a MAIL command with additional options following the
2200 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2201 were accidentally chopped off.
2203 PH/29 SMTP synchronization checks are implemented when a command is read -
2204 there is a check that no more input is waiting when there shouldn't be
2205 any. However, for some commands, a delay in an ACL can mean that it is
2206 some time before the response is written. In this time, more input might
2207 arrive, invalidly. So now there are extra checks after an ACL has run for
2208 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2209 pipelining has not been advertised.
2211 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2213 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2214 returned in the SMTP response when smtp_return_error_details was false.
2215 This has been fixed.
2217 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2218 instead of the C I/O that was originally supplied, because problems were
2219 reported on Solaris.
2221 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2222 Exim which did not show up earlier: it was assuming that a call to
2223 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2224 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2225 was a macro that became an assignment, so it seemed to work. This has
2226 changed to a proper function call with a void return, hence the compile
2227 error. Exim's code has been fixed.
2229 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2232 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2234 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2236 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2237 because it turns out to be too big or there is a timeout) there is no
2238 "Completed" line in the log. When some messages of this type were
2239 selected by exigrep, they were listed as "not completed". Others were
2240 picked up by some special patterns. I have improved the selection
2241 criteria to be more general.
2243 PH/38 The host_find_failed option in the manualroute router can now be set
2244 to "ignore", to completely ignore a host whose IP address cannot be
2245 found. If all hosts are ignored, the behaviour is controlled by the new
2246 host_all_ignored option.
2248 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2249 homing or because of multiple MX records with /mx) generated more than
2250 one IP address, and the following item turned out to be the local host,
2251 all the secondary addresses of the first item were incorrectly removed
2252 from the list, along with the local host and any following hosts (which
2253 is what is supposed to happen).
2255 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2256 whoever called Exim into the -H file. In the case of the daemon it was
2257 behaving confusingly. When first started, it used values for whoever
2258 started the daemon, but after a SIGHUP it used the Exim user (because it
2259 calls itself on a restart). I have changed the code so that it now always
2262 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2263 message are rejected with the same error (e.g. no authentication or bad
2264 sender address), and a DATA command is nevertheless sent (as can happen
2265 with PIPELINING or a stupid MUA), the error message that was given to the
2266 RCPT commands is included in the rejection of the DATA command. This is
2267 intended to be helpful for MUAs that show only the final error to their
2270 PH/42 Another patch from the Sieve maintainer.
2272 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2273 Eximstats - Fixed some broken HTML links and added missing column headers
2275 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2276 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2278 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2280 PH/43 Yet another patch from the Sieve maintainer.
2282 PH/44 I found a way to check for a TCP/IP connection going away before sending
2283 the response to the final '.' that terminates a message, but only in the
2284 case where the client has not sent further data following the '.'
2285 (unfortunately, this is allowed). However, in many cases there won't be
2286 any further data because there won't be any more messages to send. A call
2287 to select() can be used: if it shows that the input is "ready", there is
2288 either input waiting, or the socket has been closed. An attempt to read
2289 the next input character can distinguish the two cases. Previously, Exim
2290 would have sent an OK response which the client would never have see.
2291 This could lead to message repetition. This fix should cure that, at
2292 least in a lot of common cases.
2294 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2295 advertised in response to EHLO.
2301 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2302 fixed by 4.65/MH/01 (is this a record?) are fixed:
2304 (i) An empty string was always treated as zero by the numeric comparison
2305 operators. This behaviour has been restored.
2307 (ii) It is documented that the numeric comparison operators always treat
2308 their arguments as decimal numbers. This was broken in that numbers
2309 starting with 0 were being interpreted as octal.
2311 While fixing these problems I realized that there was another issue that
2312 hadn't been noticed. Values of message_size_limit (both the global option
2313 and the transport option) were treated as octal if they started with 0.
2314 The documentation was vague. These values are now always treated as
2315 decimal, and I will make that clear in the documentation.
2321 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2322 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2325 MH/01 Don't check that the operands of numeric comparison operators are
2326 integers when their expansion is in "skipping" mode (fixes bug
2327 introduced by 4.64-PH/07).
2329 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2330 child addresses, Exim now panics and dies. Previously, because the count
2331 is held in a short int, deliveries were likely to be lost. As such a
2332 large number of recipients for a single message is ridiculous
2333 (performance will be very, very poor), I have chosen to impose a limit
2334 rather than extend the field.
2340 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2341 leftover -K file (the existence of which was triggered by #402).
2342 While we were at it, introduced process PID as part of the -K
2343 filename. This should rule out race conditions when creating
2346 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2347 processing considerably. Previous code took too long for large mails,
2348 triggering a timeout which in turn triggers #401.
2350 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2351 in the DK code in transports.c. sendfile() is not really portable,
2352 hence the _LINUX specificness.
2354 TF/01 In the add_headers option to the mail command in an Exim filter,
2355 there was a bug that Exim would claim a syntax error in any
2356 header after the first one which had an odd number of characters
2359 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2360 callout verification, Exim cached a "reject" for the entire domain. This
2361 is correct for most verifications, but it is not correct for a recipient
2362 verification with use_sender or use_postmaster set, because in that case
2363 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2364 case of MAIL FROM:<> rejection from other early rejections (e.g.
2365 rejection of HELO). When verifying a recipient using a non-null MAIL
2366 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2367 Whatever the result of the callout, the value of the domain cache is
2368 left unchanged (for any other kind of callout, getting as far as trying
2369 RCPT means that the domain itself is ok).
2371 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2374 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2375 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2376 session, the daemon ignores ECONNECT errors and logs others; it now
2377 ignores EPIPE as well.
2379 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2380 (quoted-printable decoding).
2382 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2383 later the small subsequent patch to fix an introduced bug.
2385 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2387 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2389 PH/08 An error is now given if message_size_limit is specified negative.
2391 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2392 to be given (somewhat) arbitrary names.
2394 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2397 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2398 miscellaneous code fixes
2400 PH/10 Added the log_reject_target ACL modifier to specify where to log
2403 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2404 hostname. This is wrong, because it relates to the incoming message (and
2405 probably the interface on which it is arriving) and not to the outgoing
2406 callout (which could be using a different interface). This has been
2407 changed to use the value of the helo_data option from the smtp transport
2408 instead - this is what is used when a message is actually being sent. If
2409 there is no remote transport (possible with a router that sets up host
2410 addresses), $smtp_active_hostname is used.
2412 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2413 tweaks were necessary in order to get it to work (see also 21 below):
2414 (a) The code assumed that strncpy() returns a negative number on buffer
2415 overflow, which isn't the case. Replaced with Exim's string_format()
2417 (b) There were several signed/unsigned issues. I just did the minimum
2418 hacking in of casts. There is scope for a larger refactoring.
2419 (c) The code used strcasecmp() which is not a standard C function.
2420 Replaced with Exim's strcmpic() function.
2421 (d) The code set only $1; it now sets $auth1 as well.
2422 (e) A simple test gave the error "authentication client didn't specify
2423 service in request". It would seem that Dovecot has changed its
2424 interface. Fortunately there's a specification; I followed it and
2425 changed what the client sends and it appears to be working now.
2427 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2430 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2431 address A is aliased to B and C, where B exists and C does not. Without
2432 -v the output is "A verified" because verification stops after a
2433 successful redirection if more than one address is generated. However,
2434 with -v the child addresses are also verified. Exim was outputting "A
2435 failed to verify" and then showing the successful verification for C,
2436 with its parentage. It now outputs "B failed to verify", showing B's
2437 parentage before showing the successful verification of C.
2439 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2440 look up a TXT record in a specific list after matching in a combined
2443 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2444 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2445 they consult the DNS. I had assumed they would set it the way they
2446 wanted; and indeed my experiments on Linux seem to show that in some
2447 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2448 To be on the safe side, however, I have now made the interface to
2449 host_find_byname() similar to host_find_bydns(), with an argument
2450 containing the DNS resolver options. The host_find_byname() function now
2451 sets these options at its start, just as host_find_bydns() does. The smtp
2452 transport options dns_qualify_single and dns_search_parents are passed to
2453 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2454 of host_find_byname() use the default settings of RES_DEFNAMES
2455 (qualify_single) but not RES_DNSRCH (search_parents).
2457 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2458 spool_read_header() do less string testing, by means of a preliminary
2459 switch on the second character of optional "-foo" lines. (This is
2460 overdue, caused by the large number of possibilities that now exist.
2461 Originally there were few.) While I was there, I also converted the
2462 str(n)cmp tests so they don't re-test the leading "-" and the first
2463 character, in the hope this might squeeze out yet more improvement.
2465 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2466 flag allowing group syntax was set by the header_syntax check but not
2467 turned off, possible causing trouble later; (2) The flag was not being
2468 set at all for the header_verify test, causing "group"-style headers to
2469 be rejected. I have now set it in this case, and also caused header_
2470 verify to ignore an empty address taken from a group. While doing this, I
2471 came across some other cases where the code for allowing group syntax
2472 while scanning a header line wasn't quite right (mostly, not resetting
2473 the flag correctly in the right place). These bugs could have caused
2474 trouble for malformed header lines. I hope it is now all correct.
2476 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2477 with the "reply" argument non-NULL. The code, however (which originally
2478 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2479 but it didn't always do it. This confused somebody who was copying the
2480 code for some other use. I have removed all the tests.
2482 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2483 feature that was used to support insecure browsers during the U.S. crypto
2484 embargo. It requires special client support, and Exim is probably the
2485 only MTA that supported it -- and would never use it because real RSA is
2486 always available. This code has been removed, because it had the bad
2487 effect of slowing Exim down by computing (never used) parameters for the
2488 RSA_EXPORT functionality.
2490 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2491 authenticator to fail if there's a tab character in the incoming data
2492 (there should never be unless someone is messing about, as it's supposed
2493 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2494 if the connection is using TLS or if the remote IP is the same as the
2495 local IP, and the "valid-client-cert option" if a client certificate has
2498 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2499 authenticators. This can be used for authorization after authentication
2500 succeeds. (In the case of plaintext, it servers for both authentication
2503 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2504 if any retry times were supplied.
2506 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2507 connection, where there is no client IP address to check. In this
2508 situation, the verify now always succeeds.
2510 PH/25 Applied John Jetmore's -Mset patch.
2512 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2514 PH/27 In a string expansion for a processed (not raw) header when multiple
2515 headers of the same name were present, leading whitespace was being
2516 removed from all of them, but trailing whitespace was being removed only
2517 from the last one. Now trailing whitespace is removed from each header
2518 before concatenation. Completely empty headers in a concatenation (as
2519 before) are ignored.
2521 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2522 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2524 PH/29 [Removed. This was a change that I later backed out, and forgot to
2525 correct the ChangeLog entry (that I had efficiently created) before
2526 committing the later change.]
2528 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2529 address errors (4xx response to RCPT) over the same connection as other
2530 messages routed to the same hosts. Such deliveries are always "forced",
2531 so retry times are not inspected. This resulted in far too many retries
2532 for the affected addresses. The effect occurred only when there were more
2533 hosts than the hosts_max_try setting in the smtp transport when it had
2534 the 4xx errors. Those hosts that it had tried were not added to the list
2535 of hosts for which the message was waiting, so if all were tried, there
2536 was no problem. Two fixes have been applied:
2538 (i) If there are any address or message errors in an SMTP delivery, none
2539 of the hosts (tried or untried) are now added to the list of hosts
2540 for which the message is waiting, so the message should not be a
2541 candidate for sending over the same connection that was used for a
2542 successful delivery of some other message. This seems entirely
2543 reasonable: after all the message is NOT "waiting for some host".
2544 This is so "obvious" that I'm not sure why it wasn't done
2545 previously. Hope I haven't missed anything, but it can't do any
2546 harm, as the worst effect is to miss an optimization.
2548 (ii) If, despite (i), such a delivery is accidentally attempted, the
2549 routing retry time is respected, so at least it doesn't keep
2550 hammering the server.
2552 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2553 in ${readsocket because some servers need this prod.
2555 PH/32 Added some extra debug output when updating a wait-xxx database.
2557 PH/33 The hint "could be header name not terminated by colon", which has been
2558 given for certain expansion errors for a long time, was not being given
2559 for the ${if def:h_colon_omitted{... case.
2561 PH/34 The spec says: "With one important exception, whenever a domain list is
2562 being scanned, $domain contains the subject domain." There was at least
2563 one case where this was not true.
2565 PH/35 The error "getsockname() failed: connection reset by peer" was being
2566 written to the panic log as well as the main log, but it isn't really
2567 panic-worthy as it just means the connection died rather early on. I have
2568 removed the panic log writing for the ECONNRESET error when getsockname()
2571 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2572 runs only) independently of the message's sender address. This meant
2573 that, if the 4xx error was in fact related to the sender, a different
2574 message to the same recipient with a different sender could confuse
2575 things. In particular, this can happen when sending to a greylisting
2576 server, but other circumstances could also provoke similar problems.
2577 I have changed the default so that the retry time for these errors is now
2578 based a combination of the sender and recipient addresses. This change
2579 can be overridden by setting address_retry_include_sender=false in the
2582 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2583 remote server are returned as part of bounce messages. This was not
2584 happening for LMTP over a pipe (the lmtp transport), but now it is the
2585 same for both kinds of LMTP.
2587 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2588 in header lines that were in fact CNAMEs. This is no longer the case.
2590 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2591 and queue runs started by the daemon processed all messages. This has
2592 been fixed so that -R and -S can now usefully be given with -q<time>.
2594 PH/40 Import PCRE release 6.7 (fixes some bugs).
2596 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2598 PH/42 Give an error if -q is specified more than once.
2600 PH/43 Renamed the variables $interface_address and $interface_port as
2601 $received_ip_address and $received_port, to make it clear that these
2602 values apply to message reception, and not to the outgoing interface when
2603 a message is delivered. (The old names remain recognized, of course.)
2605 PH/44 There was no timeout on the connect() call when using a Unix domain
2606 socket in the ${readsocket expansion. There now is.
2608 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2609 be meaningful with "accept".
2611 SC/01 Eximstats V1.43
2612 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2614 SC/02 Eximstats V1.44
2615 Use a glob alias rather than an array ref in the generated
2616 parser. This improves both readability and performance.
2618 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2619 Collect SpamAssassin and rejection statistics.
2620 Don't display local sender or destination tables unless
2621 there is data to show.
2622 Added average volumes into the top table text output.
2624 SC/04 Eximstats V1.46
2625 Collect data on the number of addresses (recipients)
2626 as well as the number of messages.
2628 SC/05 Eximstats V1.47
2629 Added 'Message too big' to the list of mail rejection
2630 reasons (thanks to Marco Gaiarin).
2632 SC/06 Eximstats V1.48
2633 Mainlog lines which have GMT offsets and are too short to
2634 have a flag are now skipped.
2636 SC/07 Eximstats V1.49 (Alain Williams)
2637 Added the -emptyok flag.
2639 SC/08 Eximstats V1.50
2640 Fixes for obtaining the IP address from reject messages.
2642 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2643 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2644 whitespace changes from 4.64-PH/27
2646 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2649 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2650 are found, allow negative numbers in numeric criteria)
2652 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2654 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2655 to match changes made in 4.64-PH/43
2657 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2659 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2660 "domain" is actually an IP address, and force a failure. This locks out
2661 those revolvers/nameservers that support "A-for-A" lookups, in
2662 contravention of the specifications.
2664 PH/48 When a host name was looked up from an IP address, and the subsequent
2665 forward lookup of the name timed out, the host name was left in
2666 $sender_host_name, contrary to the specification.
2668 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2669 restricted to single-key lookups, Exim was not diagnosing an error if
2670 * or *@ was used with a query-style lookup.
2672 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2674 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2675 long ago, but noone interested enough thought of it. Let's just say that
2676 the "1.1" means that there are some new functions that weren't there at
2677 some point in the past.
2679 PH/51 Error processing for expansion failure of helo_data from an smtp
2680 transport during callout processing was broken.
2682 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2683 tested/used via the -bh/-bhc/-bs options.
2685 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2686 bug, fixed in subsequent PCRE releases).
2688 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2689 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2691 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2697 SC/01 Use a glob alias rather than an array ref in eximstats generated
2698 parser. This improves both readability and performance.
2700 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2701 Don't display local sender or destination tables in eximstats unless
2702 there is data to show.
2703 Added average volumes into the eximstats top table text output.
2705 SC/03 Collect data on the number of addresses (recipients) as well
2706 as the number of messages in eximstats.
2708 TF/01 Correct an error in the documentation for the redirect router. Exim
2709 does (usually) call initgroups() when daemonizing.
2711 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2712 with consistent privilege compared to when running as a daemon.
2714 TF/03 Note in the spec that $authenticated_id is not set for local
2715 submissions from trusted users.
2717 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2718 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2720 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2721 by adding some example configuration directives to the default
2722 configuration file. A little bit of work is required to uncomment the
2723 directives and define how usernames and passwords are checked, but
2724 there is now a framework to start from.
2726 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2727 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2728 without this. I don't know how relevant this is to other LDAP libraries.
2730 PH/02 Add the verb name to the "unknown ACL verb" error.
2732 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2734 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2736 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2737 directory not expanded when it should be if an expanded home directory
2738 was set for the address (which is overridden by the transport).
2740 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2743 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2744 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2745 because it is too late at that time, and has no effect.
2747 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2748 security issue with \' (bugzilla #107). I could not use the
2749 PQescapeStringConn() function, because it needs a PGconn value as one of
2752 PH/08 When testing addresses using -bt, indicate those final addresses that
2753 are duplicates that would not cause an additional delivery. At least one
2754 person was confused, thinking that -bt output corresponded to deliveries.
2755 (Suppressing duplicates isn't a good idea as you lose the information
2756 about possibly different redirections that led to the duplicates.)
2758 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2759 systems where poll() doesn't work, in particular OS X.
2761 PH/10 Added more information to debugging output for retry time not reached.
2763 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2764 operations in malware.c.
2766 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2769 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2770 syslog_duplication set false, log lines that would normally be written
2771 both the the main log and to the reject log were not written to syslog at
2774 PH/14 In the default configuration, change the use of "message" in ACL warn
2775 statements to "add_header".
2777 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2778 not followed by a command (e.g. "seen endif").
2780 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2781 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2784 PH/17 Added extra conditions to the default value of delay_warning_condition
2788 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2789 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2790 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2793 The Auto-Submitted: and various List- headers are standardised, whereas I
2794 don't think Precedence: ever was.
2796 PH/18 Refactored debugging code in route_finduser() to show more information,
2797 in particular, the error code if getpwnam() issues one.
2799 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2800 This is apparently needed in addition to the PH/07 change above to avoid
2801 any possible encoding problems.
2803 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2804 but not after initializing Perl.
2806 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2807 output them only if debugging. By default they are written stderr,
2808 apparently, which is not desirable.
2810 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2813 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2816 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2818 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2819 authenticated or an ident call has been made. Suppress the default
2820 values for $authenticated_id and $authenticated_sender (but permit -oMai
2821 and -oMas) when testing with -bh.
2823 PH/24 Re-jigged the order of the tests in the default configuration so that the
2824 tests for valid domains and recipients precede the DNS black list and CSA
2825 tests, on the grounds that those ones are more expensive.
2827 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2828 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2829 This bug exists in every version of Exim that I still have, right back to
2832 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2833 However, an attempt to turn on case-sensitivity in a regex key by
2834 including (?-i) didn't work because the subject string was already
2835 lowercased, and the effects were non-intuitive. It turns out that a
2836 one-line patch can be used to allow (?-i) to work as expected.
2842 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2843 other effects) broke the use of negated acl sub-conditions.
2845 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2848 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2849 "Deny" causes Exim to reject the incoming connection with a 554 error.
2850 Unfortunately, if there is a major crisis, such as a disk failure,
2851 tcp-wrappers gives "deny", whereas what one would like would be some
2852 kind of temporary error. A kludge has been added to help with this.
2853 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2854 554 error is used if errno is still zero or contains ENOENT (which occurs
2855 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2858 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2860 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2861 errors. Otherwise a message that provokes a temporary error (when other
2862 messages do not) can cause a whole host to time out.
2864 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2865 addresses were routed directly to files or pipes from a redirect router.
2866 File deliveries just didn't batch; pipe deliveries might have suffered
2869 PH/06 A failure to get a lock for a hints database would erroneously always say
2870 "Failed to get write lock", even when it was really a read lock.
2872 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2873 of 0600. This has been changed to use the value of the lockfile_mode
2874 option (which defaults to 0600).
2876 PH/08 Applied small patch from the Sieve maintainer.
2878 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2879 folder from quota calculations, a direct delivery into this folder messed
2880 up the contents of the maildirsize file. This was because the regex was
2881 used only to exclude .Trash (or whatever) when the size of the mailbox
2882 was calculated. There was no check that a delivery was happening into an
2883 excluded directory. This bug has been fixed by ignoring all quota
2884 processing for deliveries into excluded directories.
2886 PH/10 Added the maildirfolder_create_regex option to appendfile.
2892 PH/01 The code for finding all the local interface addresses on a FreeBSD
2893 system running IPv6 was broken. This may well have applied to all BSD
2894 systems, as well as to others that have similar system calls. The broken
2895 code found IPv4 interfaces correctly, but gave incorrect values for the
2896 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2897 that it would not match correctly against @[] and not recognize the IPv6
2900 PH/02 The ipliteral router was not recognizing addresses of the form user@
2901 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2903 PH/03 Added disable_ipv6.
2905 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2906 decoded form, because it is most often used to construct To: headers
2907 lines in autoreplies, and the decoded form may well be syntactically
2908 invalid. However, $reply_address has leading white space removed, and all
2909 newlines turned into spaces so that the autoreply transport does not
2912 PH/05 If group was specified without a user on a router, and no group or user
2913 was specified on a transport, the group from the router was ignored.
2915 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2916 for visible compile-time settings that can be used to change these
2917 numbers, for those that want even more. Backwards compatibility with old
2918 spool files has been maintained. However, going back to a previous Exim
2919 release will lost any variables that are in spool files.
2921 PH/07 Two small changes when running in the test harness: increase delay when
2922 passing a TCP/IP connection to a new process, in case the original
2923 process has to generate a bounce, and remove special handling of
2924 127.0.0.2 (sic), which is no longer necessary.
2926 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2927 be the same on different OS.
2929 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2932 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2933 whether --show-vars was specified or not
2935 JJ/02 exipick: Added support for new ACL variable spool format introduced
2938 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2939 syntactically invalid From: or Reply-to: line, and a filter used this to
2940 generate an autoreply, and therefore failed to obtain an address for the
2941 autoreply, Exim could try to deliver to a non-existent relative file
2942 name, causing unrelated and misleading errors. What now happens is that
2943 it logs this as a hard delivery error, but does not attempt to create a
2946 PH/11 The exinext utility has a -C option for testing purposes, but although
2947 the given file was scanned by exinext itself; it wasn't being passed on
2948 when Exim was called.
2950 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2951 an end-of-file indication when reading a command response.
2953 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2954 compiled. In many other places in Exim, IPv6 addresses are always
2955 recognized, so I have changed this. It also means that IPv4 domain
2956 literals of the form [IPV4:n.n.n.n] are now always recognized.
2958 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2959 used if the router is not running as root, for example, when verifying at
2960 ACL time, or when using -bh. The debugging output from this situation was
2961 non-existent - all you got was a failure to exec. I have made two
2964 (a) Failures to set uid/gid, the current directory, or a process leader
2965 in a subprocess such as that created by queryprogram now generate
2966 suitable debugging output when -d is set.
2968 (b) The queryprogram router detects when it is not running as root,
2969 outputs suitable debugging information if -d is set, and then runs
2970 the subprocess without attempting to change uid/gid.
2972 PH/15 Minor change to Makefile for building test_host (undocumented testing
2975 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2976 additional section of a DNS packet that returns MX or SRV records.
2977 Instead, it always explicitly searches for A/AAAA records. This avoids
2978 major problems that occur when a DNS server includes only records of one
2979 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2980 fixed another bug: if SRV records were looked up and the corresponding
2981 address records were *not* found in the additional section, the port
2982 values from the SRV records were lost.
2984 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2985 using the correct key (the original address) when searching the retry
2986 rules in order to find which one to use for generating the retry hint.
2988 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2989 adding the default one. Similarly, if it contains a Reply-To: header, the
2990 errors_reply_to option, if set, is not used.
2992 PH/19 When calculating a retry time, Exim used to measure the "time since
2993 failure" by looking at the "first failed" field in the retry record. Now
2994 it does not use this if it is later than than the arrival time of the
2995 message. Instead it uses the arrival time. This makes for better
2996 behaviour in cases where some deliveries succeed, thus re-setting the
2997 "first failed" field. An example is a quota failure for a huge message
2998 when small messages continue to be delivered. Without this change, the
2999 "time since failure" will always be short, possible causing more frequent
3000 delivery attempts for the huge message than are intended.
3001 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3003 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3004 $1, $2, $3) because the numerical variables can be reset during some
3005 expansion items (e.g. "match"), thereby losing the authentication data.
3007 PH/21 Make -bV show the size of off_t variables so that the test suite can
3008 decide whether to run tests for quotas > 2G.
3010 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3011 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3012 filecount value is greater than 2G or if a quota value is greater than 2G
3013 on a system where the size of off_t is not greater than 4, a panic error
3016 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3017 never match. The debug and -bh output now contains an explicit error
3018 message indicating a malformed IPv4 address or mask.
3020 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3021 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3022 PH/23 above applies.
3024 PH/25 Do not write to syslog when running in the test harness. The only
3025 occasion when this arises is a failure to open the main or panic logs
3026 (for which there is an explicit test).
3028 PH/26 Added the /no_tell option to "control=freeze".
3030 PH/27 If a host name lookup failed very early in a connection, for example, if
3031 the IP address matched host_lookup and the reverse lookup yielded a name
3032 that did not have a forward lookup, an error message of the form "no IP
3033 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3034 could be logged. Now it outputs the IP address instead of "NULL".
3036 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3037 allows the sender and the authenticated sender to be set when
3038 submitting a message from within Exim. Since child_open_exim() is
3039 documented for local_scan(), the new function should be too.
3041 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3042 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3043 results in an empty string is now treated as unset.
3045 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3047 PH/31 Added sender_verify_fail logging option.
3049 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3050 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3051 tidied the source and removed it altogether.
3053 PH/33 When a queue run was abandoned because the load average was too high, a
3054 log line was always written; now it is written only if the queue_run log
3055 selector is set. In addition, the log line for abandonment now contains
3056 information about the queue run such as the pid. This is always present
3057 in "start" and "stop" lines but was omitted from the "abandon" line.
3059 PH/34 Omit spaces between a header name and the colon in the error message that
3060 is given when verify = headers_syntax fails (if there are lots of them,
3061 the message gets confusing).
3063 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3064 names, as there are now some PTR records that contain slashes. This check
3065 is only to protect against broken name servers that fall over on strange
3066 characters, so the fact that it applies to all lookups doesn't matter.
3068 PH/36 Now that the new test suite is complete, we can remove some of the
3069 special code in Exim that was needed for the old test suite. For example,
3070 sorting DNS records because real resolvers return them in an arbitrary
3071 order. The new test suite's fake resolver always returns records in the
3074 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3075 bounces) except when queue_only is set, to avoid logging races between
3076 the different processes.
3078 PH/38 Panic-die if .include specifies a non-absolute path.
3080 PH/39 A tweak to the "H" retry rule from its user.
3082 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3083 a label. They prevented compilation on older perls.
3085 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3086 a warning to be raised on newish perls.
3088 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3089 on queue. Changes to match documented behaviour of showing count of
3090 messages matching specified criteria.
3092 PH/40 Changed the default ident timeout from 30s to 5s.
3094 PH/41 Added support for the use of login_cap features, on those BSD systems
3095 that have them, for controlling the resources used by pipe deliveries.
3097 PH/42 The content-scanning code uses fopen() to create files in which to put
3098 message data. Previously it was not paying any attention to the mode of
3099 the files. Exim runs with umask(0) because the rest of the code creates
3100 files with open(), and sets the required mode explicitly. Thus, these
3101 files were ending up world-writeable. This was not a big issue, because,
3102 being within the spool directory, they were not world-accessible. I have
3103 created a function called modefopen, which takes an additional mode
3104 argument. It sets umask(777), creates the file, chmods it to the required
3105 mode, then resets the umask. All the relevant calls to fopen() in the
3106 content scanning code have been changed to use this function.
3108 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3109 to 24 hours. This avoids potential overflow problems when processing G
3110 and H retry rules. I suspect nobody ever tinkers with this value.
3112 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3114 PH/45 When the plaintext authenticator is running as a client, the server's
3115 challenges are checked to ensure they are valid base64 strings. By
3116 default, the authentication attempt is cancelled if an invalid string is
3117 received. Setting client_ignore_invalid_base64 true ignores these errors.
3118 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3119 they are received. Thus, the responses can be made to depend on the
3120 challenges. If an invalid string is ignored, an empty string is placed in
3123 PH/46 Messages that are created by the autoreply transport now contains a
3124 References: header, in accordance with RFCs 2822 and 3834.
3126 PH/47 Added authenticated_sender_force to the smtp transport.
3128 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3130 PH/49 Installed latest patch from the Sieve maintainer.
3132 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3133 was also set, the appendfile transport was unnecessarily scanning a
3134 directory of message files (e.g. for maildir delivery) to find the count
3135 of files (along with the size), even though it did not need this
3136 information. It now does the scan only if it needs to find either the
3137 size of the count of files.
3139 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3141 PH/52 Two bugs concerned with error handling when the smtp transport is
3144 (i) Exim was not creating retry information for temporary errors given
3145 for individual recipients after the DATA command when the smtp transport
3146 was used in LMTP mode. This meant that they could be retried too
3147 frequently, and not timed out correctly.
3149 (ii) Exim was setting the flag that allows error details to be returned
3150 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3151 recipients that were returned after the DATA command.
3153 PH/53 This is related to PH/52, but is more general: for any failing address,
3154 when detailed error information was permitted to be returned to the
3155 sender, but the error was temporary, then after the final timeout, only
3156 "retry timeout exceeded" was returned. Now it returns the full error as
3157 well as "retry timeout exceeded".
3159 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3160 do this, and (what is worse) MTAs that accept it.
3162 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3163 will now be deprecated.
3165 PH/56 New os.c-cygwin from the Cygwin maintainer.
3167 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3168 formats (previously only available in exim formats via -bpr, -bpru,
3169 and -bpra. Now also available in native and exiqgrep formats)
3171 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3172 with very large, slow to parse queues
3174 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3176 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3178 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3179 responses to authentication challenges, though it was showing the
3180 challenges; (ii) I've removed the CR characters from the debug output for
3183 PH/58 Allow for the insertion of a newline as well as a space when a string
3184 is turned into more than one encoded-word during RFC 2047 encoding. The
3185 Sieve code now uses this.
3187 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3188 data_4xx, lost_connection, tls_required.
3190 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3191 message was being sent as an SMTP response.
3193 PH/61 Add -l and -k options to exicyclog.
3195 PH/62 When verifying, if an address was redirected to one new address, so that
3196 verification continued, and the new address failed or deferred after
3197 having set something in $address_data, the value of $address_data was not
3198 passed back to the ACL. This was different to the case when no
3199 redirection occurred. The value is now passed back in both cases.
3201 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3202 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3203 use login_cap.h, so on its own it isn't the distinguishing feature. The
3204 new name refers directly to the setclassresources() function.
3206 PH/65 Added configuration files for NetBSD3.
3208 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3210 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3211 is preferred over IPv4.
3213 PH/68 The bounce_return_message and bounce_return_body options were not being
3214 honoured for bounces generated during the reception of non-SMTP messages.
3215 In particular, this applied to messages rejected by the ACL. This bug has
3216 been fixed. However, if bounce_return_message is true and bounce_return_
3217 body is false, the headers that are returned for a non-SMTP message
3218 include only those that have been read before the error was detected.
3219 (In the case of an ACL rejection, they have all been read.)
3221 PH/69 The HTML version of the specification is now built in a directory called
3222 spec_html instead of spec.html, because the latter looks like a path with
3223 a MIME-type, and this confuses some software.
3225 PH/70 Catch two compiler warnings in sieve.c.
3227 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3228 function verify_get_ident() calls ip_connect() to connect a socket, but
3229 if the "connect()" function timed out, ip_connect() used to close the
3230 socket. However, verify_get_ident() also closes the socket later, and in
3231 between Exim writes to the log, which may get opened at this point. When
3232 the socket was closed in ip_connect(), the log could get the same file
3233 descriptor number as the socket. This naturally causes chaos. The fix is
3234 not to close the socket in ip_connect(); the socket should be closed by
3235 the function that creates it. There was only one place in the code where
3236 this was missing, in the iplookup router, which I don't think anybody now
3237 uses, but I've fixed it anyway.
3239 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3240 well as to direct DNS lookups. Otherwise the handling of names in host
3241 lists is inconsistent and therefore confusing.
3247 PH/01 Two changes to the default runtime configuration:
3249 (1) Move the checks for relay_from_hosts and authenticated clients from
3250 after to before the (commented out) DNS black list checks.
3252 (2) Add control=submission to the relay_from_hosts and authenticated
3253 clients checks, on the grounds that messages accepted by these
3254 statements are most likely to be submissions.
3256 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3258 (1) Generate an error if the third argument for the ${prvs expansion is
3261 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3264 (3) Reset the variables that are obtained from the first argument of
3265 ${prvscheck and used in the second argument before leaving the code,
3266 because their memory is reclaimed, so using them afterwards may do
3269 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3270 one (it's much easier than Tom thought :-).
3272 (5) Because of (4), we can now allow for the use of $prvscheck_result
3273 inside the third argument.
3275 PH/03 For some reason, the default setting of PATH when running a command from
3276 a pipe transport was just "/usr/bin". I have changed it to
3279 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3280 anything to be listed in the output from -bV.
3282 PH/05 When a filter generated an autoreply, the entire To: header line was
3283 quoted in the delivery log line, like this:
3285 => >A.N.Other <ano@some.domain> <original@ddress> ...
3287 This has been changed so that it extracts the operative address. There
3288 may be more than one such address. If so, they are comma-separated, like
3291 => >ano@some.domain,ona@other.domain <original@ddress> ...
3293 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3294 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3295 not being looked up in the rDNS to get a host name, Exim was showing the
3296 IP address twice in Received: lines, even though the IP addresses were
3297 identical. For example:
3299 Received: from [1.2.3.4] (helo=[1.2.3.4])
3301 However, if the real host name was known, it was omitting the HELO data
3302 if it matched the actual IP address. This has been tidied up so that it
3303 doesn't show the same IP address twice.
3305 PH/07 When both +timestamp and +memory debugging was on, the value given by
3306 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3307 called by the debug printing, thereby overwriting the timestamp buffer.
3308 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3310 PH/08 When the original message was included in an autoreply transport, it
3311 always said "this is a copy of the message, including all the headers",
3312 even if body_only or headers_only was set. It now gives an appropriate
3315 PH/09 Applied a patch from the Sieve maintainer which:
3317 o fixes some comments
3318 o adds the (disabled) notify extension core
3319 o adds some debug output for the result of if/elsif tests
3320 o points to the current vacation draft in the documentation
3321 and documents the missing references header update
3325 o fixes a bug in processing the envelope test (when testing
3326 multiple envelope elements, the last element determined the
3329 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3330 Electronic Mail") by including:
3332 Auto-submitted: auto-generated
3334 in the messages that it generates (bounce messages and others, such as
3335 warnings). In the case of bounce messages for non-SMTP messages, there was
3336 also a typo: it was using "Auto_submitted" (underscore instead of
3337 hyphen). Since every message generated by Exim is necessarily in response
3338 to another message, thes have all been changed to:
3340 Auto-Submitted: auto-replied
3342 in accordance with these statements in the RFC:
3344 The auto-replied keyword:
3346 - SHOULD be used on messages sent in direct response to another
3347 message by an automatic process,
3349 - MUST NOT be used on manually-generated messages,
3351 - MAY be used on Delivery Status Notifications (DSNs) and Message
3352 Disposition Notifications (MDNs),
3354 - MUST NOT be used on messages generated by automatic or periodic
3355 processes, except for messages which are automatic responses to
3358 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3359 to the default Received: header definition.
3361 PH/12 Added log selector acl_warn_skipped (default on).
3363 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3364 variables because (a) they are in the wrong storage pool and (b) even if
3365 they were copied, it wouldn't work properly because of the caching.
3367 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3368 checking when decoding. Apparently there are clients that generate
3369 overlong encoded strings. Why am I not surprised?
3371 PH/15 If the first argument of "${if match_address" was not empty, but did not
3372 contain an "@" character, Exim crashed. Now it writes a panic log message
3373 and treats the condition as false.
3375 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3377 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3378 extension "envelope-auth". The code is finished and in agreement with
3379 other implementations, but there is no documentation so far and in fact,
3380 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3381 not changing the active code.
3383 Print executed "if" and "elsif" statements when debugging is used. This
3384 helps a great deal to understand what a filter does.
3386 Document more things not specified clearly in RFC3028. I had all this
3387 sorted out, when out of a sudden new issues came to my mind. Oops."
3389 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3392 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3393 canonical form (as documented). However, after a host name lookup from
3394 the IP address, check_host() was doing a simple string comparison with
3395 addresses acquired from the DNS when checking that the found name did
3396 have the original IP as one of its addresses. Since any found IPv6
3397 addresses are likely to be in abbreviated form, the comparison could
3398 fail. Luckily, there already exists a function for doing the comparison
3399 by converting both addresses to binary, so now that is used instead of
3400 the text comparison.
3402 PH/20 There was another similar case to PH/19, when a complete host name was
3403 given in a host list; looking up its IP address could give an abbreviated
3404 form, whereas the current host's name might or might not be abbreviated.
3405 The same fix has been applied.
3411 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3412 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3415 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3416 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3418 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3420 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3421 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3422 Also, for "Auto-Submitted", treat anything other than "no" as
3423 non-personal, in accordance with RFC 3834. (Previously it treated
3424 anything starting "auto-" as non-personal.)
3426 TF/01 The control=submission/name=... option had a problem with syntax
3427 errors if the name included a slash character. The /name= option
3428 now slurps the rest of the string, so it can include any characters
3429 but it must come last in the list of options (after /sender_retain
3432 PH/05 Some modifications to the interface to the fake nameserver for the new
3440 TK/01 Added the "success_on_redirect" address verification option. See
3441 NewStuff for rationale and an example.
3443 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3445 PH/02 Patch to exigrep to allow it to work on syslog lines.
3447 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3448 fread() to skip over the body file's header line, because in Cygwin the
3449 header line is locked and is inaccessible.
3451 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3452 co-exist for some time) to make it clear that it is the Exim ID that is
3453 referenced, not the Message-ID: header line.
3455 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3456 string_format() function, because snprintf() does not exist on all
3459 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3460 ${stat: expansion item.
3462 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3463 protocol synchronization error", to keep the pedants happy.
3465 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3466 well as for IRIX systems, when gcc is being used. See the host.c source
3469 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3471 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3474 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3475 transport and to the smtp transport in LMTP mode.
3477 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3479 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3480 run a filter in a subprocess. This could lead to confusion in subsequent
3481 lookups in the parent process. There should also be a search_tidyup() at
3482 the end of the subprocess.
3484 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3485 only if the host matched helo_try_verify_hosts, which caused the
3486 verification to occur when the EHLO/HELO command was issued. The ACL just
3487 tested the remembered result. Now, if a previous verification attempt has
3488 not happened, "verify = helo" does it there and then.
3490 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3492 TK/03 Fix log output including CR from clamd.
3494 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3495 exist provoked a memory error which could cause a segfault.
3497 PH/15 Installed PCRE 6.2
3499 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3501 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3502 of the problem. Specifically, suggested +O2 rather than +O1 for the
3505 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3507 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3508 record, the port was not correctly logged when the outgoing_port log
3509 selector was set (it logged the transort's default port).
3511 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3512 fallback_hosts, and "hosts" in the smtp transport.
3514 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3515 host errors such as "Connection refused".
3517 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3518 authentication with radiusclient 0.4.9:
3520 - Error returned from rc_read_config was caught wrongly
3521 - Username/password not passed on to radius server due to wrong length.
3523 The presumption is that some radiusclient API changes for 4.51/PH/17
3524 were not taken care of correctly. The code is still untested by me (my
3525 Linux distribution still has 0.3.2 of radiusclient), but it was
3526 contributed by a Radius user.
3528 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3529 expanding the "port" option of the smtp transport.
3531 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3532 while reading a MIME header. Thanks to Tom Hughes for a patch.
3534 PH/24 Include config.h inside local_scan.h so that configuration settings are
3537 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3538 that in an ACL for RCPT (for example), you can examine exactly what was
3541 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3542 commands, but it was not correctly comparing the address with the actual
3543 client host address. Thus, it would show the EHLO address in Received:
3544 header lines when this was not necessary.
3546 PH/27 Added the % operator to ${eval:}.
3548 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3549 it should be ignoring failures (because with -C, for example, it has lost
3550 privilege). It wasn't ignoring creation failures other than "already
3553 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3556 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3557 because an input line was too long, either on its own, or by virtue of
3558 too many continuations, the temporary file was not being removed, and the
3559 return code was incorrect.
3561 PH/31 Missing "BOOL" in function definition in filtertest.c.
3563 PH/32 Applied Sieve patches from the maintainer.
3565 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3567 PH/33 Added "verify = not_blind".
3569 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3570 Local/Makefile (with some defaults set). These are used in built scripts
3571 such as exicyclog, but they have never been used in the exim_install
3572 script (though there are many overriding facilities there). I have
3573 arranged that the exim_install script now takes note of these two
3576 PH/35 Installed configuration files for Dragonfly.
3578 PH/36 When a locally submitted message by a trusted user did not contain a
3579 From: header, and the sender address was obtained from -f or from an SMTP
3580 MAIL command, and the trusted user did not use -F to supply a sender
3581 name, $originator_name was incorrectly used when constructing a From:
3582 header. Furthermore, $originator_name was used for submission mode
3583 messages from external hosts without From: headers in a similar way,
3584 which is clearly wrong.
3586 PH/37 Added control=suppress_local_fixups.
3588 PH/38 When log_selector = +received_sender was set, and the addition of the
3589 sender made the log line's construction buffer exactly full, or one byte
3590 less than full, an overflow happened when the terminating "\n" was
3593 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3594 when the result of a list match is failure because a DNS lookup failed.
3596 PH/40 RM_COMMAND is now used in the building process.
3598 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3599 the "build-* directories that it finds.
3601 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3602 address in a domain literal was a prefix of an interface address.
3604 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3605 when verifying a sender address, unless rewrite_headers is false.
3607 PH/44 Wrote a long comment about why errors_to addresses are verified as
3608 recipients, not senders.
3610 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3611 the ratelimit ACL was added.
3613 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3615 PH/46 Added extra information about PostgreSQL errors to the error string.
3617 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3618 avoiding the need to install special zones in a real server. This is
3619 backwards compatible; if it can't find the fake resolver, it drops back.
3620 Thus, both old and new test suites can be run.
3622 TF/02 Added util/ratelimit.pl
3624 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3625 clock is set back in time.
3627 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3628 Candler <B.Candler@pobox.com>.
3630 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3631 OK for addresses that are the result of redirections.
3633 PH/48 A number of further additions for the benefit of the new test suite,
3634 including a fake gethostbyname() that interfaces to the fake DNS resolver
3637 TF/06 The fix for widen_domains has also been applied to qualify_single and
3638 search_parents which are the other dnslookup options that can cause
3641 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3644 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3646 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3647 service" if it encountered an MX record with an empty target hostname.
3648 The message is now "an MX or SRV record indicated no SMTP service".
3650 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3651 if the DNS of the sending site is misconfigured. This is quite a
3652 common situation. This change restores the behaviour of treating a
3653 helo verification defer as a failure.
3655 PH/51 If self=fail was set on a router, the bounce message did not include the
3656 actual error message.
3662 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3664 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3665 command itself ended in error, the underlying message about the transport
3666 filter timeout was being overwritten with the pipe command error. Now the
3667 underlying error message should be appended to the second error message.
3669 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3671 PH/02 Reduce the amount of output that "make" produces by default. Full output
3672 can still be requested.
3674 PH/03 The warning log line about a condition test deferring for a "warn" verb
3675 was being output only once per connection, rather than after each
3676 occurrence (because it was using the same function as for successful
3677 "warn" verbs). This seems wrong, so I have changed it.
3679 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3680 it should not have, which might have caused a crash in the right
3681 circumstances, but probably never did.
3683 PH/04 Installed a modified version of Tony Finch's patch to make submission
3684 mode fix the return path as well as the Sender: header line, and to
3685 add a /name= option so that you can make the user's friendly name appear
3688 TF/03 Added the control = fakedefer ACL modifier.
3690 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3691 Mark Lowes for thorough testing.
3693 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3695 TK/03 Merged latest SRS patch from Miles Wilton.
3697 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3698 with the definition in sysexits.h (which is #included earlier).
3699 Fortunately, Exim does not actually use EX_OK. The code used to try to
3700 preserve the sysexits.h value, by assuming that macro definitions were
3701 scanned for macro replacements. I have been disabused of this notion,
3702 so now the code just undefines EX_OK before #including unistd.h.
3704 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3705 in the smtp transport. When a block could not be written in a single
3706 write() function, the timeout was being re-applied to each part-write.
3707 This seems wrong - if the receiver was accepting one byte at a time it
3708 would take for ever. The timeout is now adjusted when this happens. It
3709 doesn't have to be particularly precise.
3711 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3712 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3714 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3715 without a domain if the check to <postmaster@domain> fails.
3717 SC/01 Eximstats: added -xls and the ability to specify output files
3718 (patch written by Frank Heydlauf).
3720 SC/02 Eximstats: use FileHandles for outputting results.
3722 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3724 SC/04 Eximstats: fixed display of large numbers with -nvr option
3726 SC/05 Eximstats: fixed merging of reports with empty tables.
3728 SC/06 Eximstats: added the -include_original_destination flag
3730 SC/07 Eximstats: removed tabs and trailing whitespace.
3732 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3734 TK/06 MBOX spool code: Add real "From " MBOX separator line
3735 so the .eml file is really in mbox format (even though
3736 most programs do not really care). Patch from Alex Miller.
3738 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3739 The latter is generated from $received_to and is only set if the
3740 message has one envelope recipient. SA can use these headers,
3741 obviously out-of-the-box. Patch from Alex Miller.
3743 PH/08 The ${def test on a variable was returning false if the variable's
3744 value was "0", contrary to what the specification has always said!
3745 The result should be true unless the variable is empty.
3747 PH/09 The syntax error of a character other than { following "${if
3748 def:variable_name" (after optional whitespace) was not being diagnosed.
3749 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3750 accidental colon was present, for example, could give incorrect results.
3752 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3753 result is used (not including appendfile, where other changes are about
3756 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3757 This involved changing a lot of size variables from int to off_t. It
3758 should work with maildirs and everything.
3760 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3761 spamd dying while we are connected to it.
3763 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3766 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3767 function for BDB 4.3.
3769 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3771 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3772 the sources for PCRE have been re-arranged and more files are now
3775 PH/15 The code I had for printing potentially long long variables in PH/11
3776 above was not the best (it lost precision). The length of off_t variables
3777 is now inspected at build time, and an appropriate printing format (%ld
3778 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3779 to be "long long int" or "long int". This is needed for the internal
3780 formatting function string_vformat().
3782 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3783 the configuration file to be ":syslog", then the script "guesses" where
3784 the logs files are, rather than using the compiled in default. In our
3785 case the guess is not the same as the compiled default, so the script
3786 suddenly stopped working when I started to use syslog. The patch checks
3787 to see if log_file_path is "". If so, it attempts to read it from exim
3788 with no configuration file to get the compiled in version, before it
3789 falls back to the previous guessing code."
3791 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3792 implementing BATV in an Exim configuration. See NewStuff for the gory
3795 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3796 Makefile that are specific to HP-UX.
3798 PH/18 If the "use_postmaster" option was set for a recipient callout together
3799 with the "random" option, the postmaster address was used as the MAIL
3800 FROM address for the random test, but not for the subsequent recipient
3801 test. It is now used for both.
3803 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3804 patch removes a few documentation additions to RFC 3028, because the
3805 latest draft now contains them. It adds the new en;ascii-case comparator
3806 and a new error check for 8bit text in MIME parts. Comparator and
3807 require names are now matched exactly. I enabled the subaddress
3808 extension, but it is not well tested yet (read: it works for me)."
3810 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3811 rework some of the code of TK/09 above to avoid the hardwired use of
3812 "%lld" and "long long". Replaced the call to snprintf() with a call to
3815 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3816 records point to non-existent hosts", "retry timeout exceeded", and
3817 "retry time not reached for any host after a long failure period".
3819 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3820 experimental DomainKeys support:
3822 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3823 (2) On an error such as an illegally used "control", the wrong name for
3824 the control was given.
3826 These problems did NOT occur unless DomainKeys support was compiled.
3828 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3830 PH/24 Added ${if match_ip condition.
3832 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3833 databases so that it will be absolutely obvious if a crash occurs in the
3834 DB library. This is a regular occurrence (often caused by mis-matched
3837 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3838 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3839 picked up on a user's system that detects such things. There doesn't seem
3840 to be a gcc warning option for this - only an attribute that has to be
3841 put on the function's prototype. It seems that in Fedora Core 4 they have
3842 set this on a number of new functions. No doubt there will be more in due
3845 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3846 specify a transport. However, if an address that was verified by such a
3847 router was the subject of a callout, Exim crashed because it tried to
3848 read the rcpt_include_affixes from the non-existent transport. Now it
3849 just assumes that the setting of that option is false. This bug was
3850 introduced by 4.51/PH/31.
3852 PH/28 Changed -d+all to exclude +memory, because that information is very
3853 rarely of interest, but it makes the output a lot bigger. People tend to
3854 do -d+all out of habit.
3856 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3857 code in os-type was giving problems when libc.so lives in lib64, like on
3860 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3861 aren't the modern standard, and it seems that some systems' include files
3862 don't always have them. Exim was already checking for some of the newer
3863 ones like T_AAAA, and defining it itself. I've added checks for all the
3864 record types that Exim uses.
3866 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3867 not automatically generating a new one, as it is supposed to. This
3868 prevented TLS from working. If the file did exist, but contained invalid
3869 data, a new version was generated, as expected. It was only the case of a
3870 non-existent file that was broken.
3872 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3873 with a change in libdomainkeys > 0.64.
3875 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3876 from DNS. If the selector record carries the flag, it now has
3877 precedence over the domain-wide flag.
3879 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3881 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3882 the use of a port name that isn't defined in /etc/services) occurred, the
3883 message was deferred as in a normal delivery, and thus remained on the
3884 spool, instead of being failed because of the mua_wrapper setting. This
3885 is now fixed, and I tidied up some of the mua_wrapper messages at the
3888 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3889 the messages in a hash of arrays rather than using individual hashes.
3890 This is a bit cleaner and results in dramatic memory savings, albeit
3891 at a slight CPU cost.
3893 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3894 as requested by Marc Sherman.
3896 SC/10 Eximstats: added histograms for user specified patterns as requested
3899 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3901 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3902 fopen() in the content-scanning modules that did not already have it.
3908 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3909 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3911 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3913 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3915 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3916 to test Sieve filters that use "vacation".
3918 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3919 that changes the way the GnuTLS parameters are stored in the cache file.
3920 The new format can be generated externally. For backward compatibility,
3921 if the data in the cache doesn't make sense, Exim assumes it has read an
3922 old-format file, and it generates new data and writes a new file. This
3923 means that you can't go back to an older release without removing the
3926 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3927 work if there are any delivery delays because "one_time" forces the
3928 parent to be marked "delivered", so its unseen clone is never tried
3929 again. For this reason, Exim now forbids the simultaneous setting of
3932 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3933 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3934 entry if you want to know the details. The fix, however, neglected to
3935 consider the case when local delivery batching is involved. The test for
3936 "previously delivered" was not happening when checking to see if an
3937 address could be batched with a previous (undelivered) one; under
3938 certain circumstances this could lead to multiple deliveries to the same
3941 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3942 in its include files, and this causes problems building Exim.
3944 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3945 header_syntax) but Exim was just ignoring anything given after a slash.
3946 In particular, this caused confusion with an attempt to use "verify =
3947 reverse_host_lookup/defer_ok". An error is now given when options are
3948 supplied for verify items that do not have them. (Maybe reverse_host_
3949 lookup should have a defer_ok option, but that's a different point.)
3951 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3952 defined by RFC 821) to 2048, because there were problems with some AUTH
3953 commands, and RFC 1869 says the size should be increased for extended
3954 SMTP commands that take arguments.
3956 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3959 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3960 "unknown" error; now it says that the functionality isn't in the binary.
3962 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3963 an address' error message when a string expansion fails (syntax or
3964 whatever). Otherwise the password may appear in the log. Following change
3965 PH/42 below, there is no longer a chance of it appearing in a bounce
3968 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3970 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3971 of its addresses was ever tried. (Bugzilla bug #2.)
3973 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3974 the result incorrectly in the debug output. (It correctly added a newline
3975 to what was transported.)
3977 TF/01 Added $received_time.
3979 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3980 commented out examples of how to interface to a virus scanner and to
3981 SpamAssassin. Also added commented examples of av_scanner and
3982 spamd_address settings.
3984 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3985 and controls are allowed in which ACLs. There were a couple of minor
3986 errors. Some of the entries in the conditions table (which is a table of
3987 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3988 negation of where the condition IS allowed.
3990 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3992 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3993 header file does not have a version number, so I've had to invent a new
3994 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3995 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3996 radiusclient), but it was contributed by a Radius user.
3998 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3999 files or directories, for OpenSSL.
4001 PH/19 When an Exim process that is running as root has to create an Exim log
4002 file, it does so in a subprocess that runs as exim:exim so as to get the
4003 ownership right at creation (otherwise, other Exim processes might see
4004 the file with the wrong ownership). There was no test for failure of this
4005 fork() call, which would lead to the process getting stuck as it waited
4006 for a non-existent subprocess. Forks do occasionally fail when resources
4007 run out. I reviewed all the other calls to fork(); they all seem to check
4010 PH/20 When checking for unexpected SMTP input at connect time (before writing
4011 the banner), Exim was not dealing correctly with a non-positive return
4012 from the read() function. If the client had disconnected by this time,
4013 the result was a log entry for a synchronization error with an empty
4014 string after "input=" when read() returned zero. If read() returned -1
4015 (an event I could not check), uninitialized data bytes were printed.
4016 There were reports of junk text (parts of files, etc) appearing after
4019 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4021 PH/22 Added support for macro redefinition, and (re)definition in between
4022 driver and ACL definitions.
4024 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4025 forgetting to use the resulting value; it was using the unexpanded value.
4027 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4028 hadn't been configured. The fix is from Juergen Kreileder, who
4029 understands it better than I do:
4031 "Here's what I see happening with three configured cyrus_sasl
4032 authenticators configured (plain, login, cram-md5):
4034 On startup auth_cyrus_sasl_init() gets called for each of these.
4035 This means three calls to sasl_listmech() without a specified mech_list.
4036 => SASL tests which mechs of all available mechs actually work
4037 => three warnings about OTP not working
4038 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4040 With the patch, sasl_listmech() also gets called three times. But now
4041 SASL's mech_list option is set to the server_mech specified in the the
4042 authenticator. Or in other words, the answer from sasl_listmech()
4043 gets limited to just the mech you're testing for (which is different
4045 => the return list contains just 'plain' or 'login', 'cram-md5' or
4046 nothing depending on the value of ob->server_mech.
4048 I've just tested the patch: Authentication still works fine,
4049 unavailable mechs specified in the exim configuration are still
4050 caught, and the auth.log warnings about OTP are gone."
4052 PH/25 When debugging is enabled, the contents of the command line are added
4053 to the debugging output, even when log_selector=+arguments is not
4056 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4057 answer is "GNU", and only if the return is "GNU/something" is the answer
4060 PH/27 $acl_verify_message is now set immediately after the failure of a
4061 verification in an ACL, and so is available in subsequent modifiers. In
4062 particular, the message can be preserved by coding like this:
4064 warn !verify = sender
4065 set acl_m0 = $acl_verify_message
4067 Previously, $acl_verify_message was set only while expanding "message"
4068 and "log_message" when a very denied access.
4070 PH/28 Modified OS/os.c-Linux with
4072 -#ifndef OS_LOAD_AVERAGE
4073 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4075 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4076 nomenclature these days.)
4078 PH/29 Installed patch from the Sieve maintainer that adds the options
4079 sieve_useraddress and sieve_subaddress to the redirect router.
4081 PH/30 In these circumstances:
4082 . Two addresses routed to the same list of hosts;
4083 . First host does not offer TLS;
4084 . First host accepts first address;
4085 . First host gives temporary error to second address;
4086 . Second host offers TLS and a TLS session is established;
4087 . Second host accepts second address.
4088 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4089 and peerdn, if requested) that were in fact used only for the second
4092 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4093 attention to any local part prefix or suffix that was matched by the
4094 router that accepted the address. It now behaves in the same way as it
4095 does for delivery: the affixes are removed from the local part unless
4096 rcpt_include_affixes is set on the transport.
4098 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4099 timeout during the DATA phase of an incoming message.
4101 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4102 applied a patch sanctioned by the Sieve maintainer.
4104 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4105 the uid or gid is negative. A case of a negative gid caused this to be
4106 noticed. The fix allows for either to be negative.
4108 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4109 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4112 PH/36 The change PH/12 above was broken. Fixed it.
4114 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4115 the grounds that routing the same address twice would always produce the
4116 same answer. This might have been true once, but it is certainly no
4117 longer true now. Routing a child address may depend on the previous
4118 routing that produced that child. Some complicated redirection strategies
4119 went wrong when messages had multiple recipients, and made Exim's
4120 behaviour dependent on the order in which the addresses were given.
4122 I have moved the duplicate checking until after the routing is complete.
4123 Exim scans the addresses that are assigned to local and remote
4124 transports, and removes any duplicates. This means that more work will be
4125 done, as duplicates will always all be routed, but duplicates are
4126 presumably rare, so I don't expect this is of any significance.
4128 For deliveries to pipes, files, and autoreplies, the duplicate checking
4129 still happens during the routing process, since they are not going to be
4132 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4133 It corrects a timeout issue with spamd. This is Ian's comment: "The
4134 background is that sometimes spamd either never reads data from a
4135 connection it has accepted, or it never writes response data. The exiscan
4136 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4137 blindly assumes that writes won't block so it may never time out."
4139 PH/39 Allow G after quota size as well as K and M.
4141 PH/40 The value set for $authenticated_id in an authenticator may not contain
4142 binary zeroes or newlines because the value is written to log lines and
4143 to spool files. There was no check on this. Now the value is run through
4144 the string_printing() function so that such characters are converted to
4145 printable escape sequences.
4147 PH/41 $message_linecount is a new variable that contains the total number of
4148 lines in the message. Compare $body_linecount, which is the count for the
4151 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4152 bounce and delay warning messages, except in certain special cases, which
4155 (a) An SMTP error message from a remote host;
4156 (b) A message specified in a :fail: redirection;
4157 (c) A message specified in a "fail" command in a system filter;
4158 (d) A message specified in a FAIL return from the queryprogram router;
4159 (e) A message specified by the cannot_route_message router option.
4161 In these cases only, Exim does include the error details in bounce and
4162 warning messages. There are also a few cases where bland messages such
4163 as "unrouteable address" or "local delivery error" are given.
4165 PH/43 $value is now also set for the "else" part of a ${run expansion.
4167 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4168 being worked on, but at least Exim now implements the latest version to
4171 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4172 process to complete was treated as a delivery failure, a timeout while
4173 writing the message to the pipe was logged, but erroneously treated as a
4174 successful delivery. Such timeouts include transport filter timeouts. For
4175 consistency with the overall process timeout, these timeouts are now
4176 treated as errors, giving rise to delivery failures by default. However,
4177 there is now a new Boolean option for the pipe transport called
4178 timeout_defer, which, if set TRUE, converts the failures into defers for
4179 both kinds of timeout. A transport filter timeout is now identified in
4182 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4183 systems where "make" and "gmake" are different, calling "gmake" at top
4184 level broke things. I've arranged for the value of $(MAKE) to be passed
4185 from the Makefile to this script so that it can call the same version of
4189 A note about Exim versions 4.44 and 4.50
4190 ----------------------------------------
4192 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4193 changes of various kinds. As a consequence, a big documentation update was
4194 needed. This delayed the release for rather longer than seemed good, especially
4195 in the light of a couple of (minor) security issues. Therefore, the changes
4196 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4197 release. So 4.44 and 4.50 are in effect two different branches that both start
4200 I have left the 4.50 change log unchanged; it contains all the changes since
4201 4.43. The change log for 4.44 is below; many of its items are identical to
4202 those for 4.50. This seems to be the most sensible way to preserve the
4203 historical information.
4209 1. Minor wording change to the doc/README.SIEVE file.
4211 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4212 computation of the current number of files was incorrect.
4214 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4215 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4218 4. Give more explanation in the error message when the command for a transport
4219 filter fails to execute.
4221 5. There are several places where Exim runs a non-Exim command in a
4222 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4223 was being done only for the command run by the queryprogram router. It is
4224 now done for all such subprocesses. The other cases are: ${run, transport
4225 filters, and the commands run by the lmtp and pipe transports.
4227 6. Added CONFIGURE_GROUP build-time option.
4229 7. Some older OS have a limit of 256 on the maximum number of file
4230 descriptors. Exim was using setrlimit() to set 1000 as a large value
4231 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4232 systems. I've change it so that if it can't get 1000, it tries for 256.
4234 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4235 was an oversight, and furthermore, ever since the addition of extra
4236 controls (e.g. 4.43/32), the checks on when to allow different forms of
4237 "control" were broken. There should now be diagnostics for all cases when a
4238 control that does not make sense is encountered.
4240 9. Added the /retain_sender option to "control=submission".
4242 10. $recipients is now available in the predata ACL (oversight).
4244 11. Tidy the search cache before the fork to do a delivery from a message
4245 received from the command line. Otherwise the child will trigger a lookup
4246 failure and thereby defer the delivery if it tries to use (for example) a
4247 cached ldap connection that the parent has called unbind on.
4249 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4250 of $address_data from the recipient verification was clobbered by the
4251 sender verification.
4253 13. The value of address_data from a sender verification is now available in
4254 $sender_address_data in subsequent conditions in the ACL statement.
4256 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4258 15. Added a new option "connect=<time>" to callout options, to set a different
4261 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4262 was its contents. (It was OK if the option was not defined at all.)
4264 17. A "Completed" log line is now written for messages that are removed from
4265 the spool by the -Mrm option.
4267 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4268 information about exactly what failed.
4270 19. Added -dd to debug only the daemon process.
4272 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4273 handles timeouts, both on the server side and network timeouts. Renamed the
4274 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4276 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4277 It is now set to "smtps".
4279 22. $host_address is now set to the target address during the checking of
4280 ignore_target_hosts.
4282 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4283 being passed; this would have caused $sender_host_name to have been used if
4284 matching the list had actually called for a host name (not very likely,
4285 since this list is usually IP addresses). A host name is now passed as
4288 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4289 code that specifies a non-restarting handler (typically sigaction() in
4290 modern systems) in an attempt to fix a rare and obscure crash bug.
4292 25. Narrowed the window for a race in the daemon that could cause it to ignore
4293 SIGCHLD signals. This is not a major problem, because they are used only to
4294 wake it up if nothing else does.
4296 26. A malformed maildirsize file could cause Exim to calculate negative values
4297 for the mailbox size or file count. Odd effects could occur as a result.
4298 The maildirsize information is now recalculated if the size or filecount
4301 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4302 support for a long time. Removed HAVE_SYS_VFS_H.
4304 28. Installed the latest version of exipick from John Jetmore.
4306 29. In an address list, if the pattern was not a regular expression, an empty
4307 subject address (from a bounce message) matched only if the pattern was an
4308 empty string. Non-empty patterns were not even tested. This was the wrong
4309 because it is perfectly reasonable to use an empty address as part of a
4310 database query. An empty address is now tested by patterns that are
4311 lookups. However, all the other forms of pattern expect the subject to
4312 contain a local part and a domain, and therefore, for them, an empty
4313 address still always fails if the pattern is not itself empty.
4315 30. Exim went into a mad DNS loop when attempting to do a callout where the
4316 host was specified on an smtp transport, and looking it up yielded more
4317 than one IP address.
4319 31. Re-factored the code for checking spool and log partition space into a
4320 function that finds that data and another that does the check. The former
4321 is then used to implement four new variables: $spool_space, $log_space,
4322 $spool_inodes, and $log_inodes.
4324 32. The RFC2047 encoding function was originally intended for short strings
4325 such as real names; it was not keeping to the 75-character limit for
4326 encoded words that the RFC imposes. It now respects the limit, and
4327 generates multiple encoded words if necessary. To be on the safe side, I
4328 have increased the buffer size for the ${rfc2047: expansion operator from
4331 33. It is now permitted to omit both strings after an "if" condition; if the
4332 condition is true, the result is "true". As before, when the second string
4333 is omitted, a false condition yields an empty string. This makes it less
4334 cumbersome to write custom ACL and router conditions.
4336 34. Failure to deliver a bounce message always caused it to be frozen, even if
4337 there was an errors_to setting on the router. The errors_to setting is now
4340 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4341 canonical form (fully expanded) before being placed in
4342 $sender_host_address.
4344 36. The table in the code that translates DNS record types into text (T_A to
4345 "A" for instance) was missing entries for NS and CNAME. It is just possible
4346 that this could have caused confusion if both these types were looked up
4347 for the same domain, because the text type is used as part of Exim's
4348 per-process caching. But the chance of anyone hitting this buglet seems
4351 37. The dnsdb lookup has been extended in a number of ways.
4353 (1) There is a new type, "zns", which walks up the domain tree until it
4354 finds some nameserver records. It should be used with care.
4356 (2) There is a new type, "mxh", which is like "mx" except that it returns
4357 just the host names, not the priorities.
4359 (3) It is now possible to give a list of domains (or IP addresses) to be
4360 looked up. The behaviour when one of the lookups defers can be
4361 controlled by a keyword.
4363 (4) It is now possible to specify the separator character for use when
4364 multiple records are returned.
4366 38. The dnslists ACL condition has been extended: it is now possible to supply
4367 a list of IP addresses and/or domains to be looked up in a particular DNS
4370 39. Added log_selector=+queue_time_overall.
4372 40. When running the queue in the test harness, wait just a tad after forking a
4373 delivery process, to get repeatability of debugging output.
4375 41. Include certificate and key file names in error message when GnuTLS fails
4376 to set them up, because the GnuTLS error message doesn't include the name
4377 of the failing file when there is a problem reading it.
4379 42. Allow both -bf and -bF in the same test run.
4381 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4383 44. The "Exiscan patch" is now merged into the mainline Exim source.
4385 45. Sometimes the final signoff response after QUIT could fail to get
4386 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4387 < 0 before doing a fflush(). This bug looks as though it goes back to the
4388 introduction of TLS in release 3.20, but "sometimes" must have been rare
4389 because the tests only now provoked it.
4391 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4392 (this can affect the format of dates).
4394 47. exim_tidydb, when checking for the continued existence of a message for
4395 which it has found a message-specific retry record, was not finding
4396 messages that were in split spool directories. Consequently, it was
4397 deleting retry records that should have stayed in existence.
4399 48. Steve fixed some bugs in eximstats.
4401 49. The SPA authentication driver was not abandoning authentication and moving
4402 on to the next authenticator when an expansion was forced to fail,
4403 contradicting the general specification for all authenticators. Instead it
4404 was generating a temporary error. It now behaves as specified.
4406 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4407 (the order specifies the preference for clients). The order is now AES256,
4408 AES128, 3DES, ARCFOUR128.
4410 51. Small patch to Sieve code - explicitly set From: when generating an
4413 52. Exim crashed if a remote delivery caused a very long error message to be
4414 recorded - for instance if somebody sent an entire SpamAssassin report back
4415 as a large number of 550 error lines. This bug was coincidentally fixed by
4416 increasing the size of one of Exim's internal buffers (big_buffer) that
4417 happened as part of the Exiscan merge. However, to be on the safe side, I
4418 have made the code more robust (and fixed the comments that describe what
4421 53. Now that there can be additional text after "Completed" in log lines (if
4422 the queue_time_overall log selector is set), a one-byte patch to exigrep
4423 was needed to allow it to recognize "Completed" as not the last thing in
4426 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4427 patch that reportedly fixes this has been added. I am not expert enough to
4428 create a test for it. This is what the patch creator wrote:
4430 "I found a little strange behaviour of ldap code when working with
4431 Windows 2003 AD Domain, where users was placed in more than one
4432 Organization Units. When I tried to give exim partial DN, the exit code
4433 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4434 But simultaneously result of request was absolutely normal ldap result,
4435 so I produce this patch..."
4437 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4438 REFERENCE, so I have modified the code to exclude the patch when that macro
4441 55. Some experimental protocols are using DNS PTR records for new purposes. The
4442 keys for these records are domain names, not reversed IP addresses. The
4443 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4444 leaves it alone. Component reversal etc. now happens only for IP addresses.
4447 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4449 57. Double the size of the debug message buffer (to 2048) so that more of very
4450 long debug lines gets shown.
4452 58. The exicyclog utility now does better if the number of log files to keep
4453 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4455 59. Two changes related to the smtp_active_hostname option:
4457 (1) $smtp_active_hostname is now available as a variable.
4458 (2) The default for smtp_banner uses $smtp_active_hostname instead
4459 of $primary_hostname.
4461 60. The host_aton() function is supposed to be passed a string that is known
4462 to be a valid IP address. However, in the case of IPv6 addresses, it was
4463 not checking this. This is a hostage to fortune. Exim now panics and dies
4464 if the condition is not met. A case was found where this could be provoked
4465 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4466 components; fortuitously, this particular loophole had already been fixed
4467 by change 4.50/55 above.
4469 If there are any other similar loopholes, the new check in host_aton()
4470 itself should stop them being exploited. The report I received stated that
4471 data on the command line could provoke the exploit when Exim was running as
4472 exim, but did not say which command line option was involved. All I could
4473 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4474 running as the user.
4477 61. There was a buffer overflow vulnerability in the SPA authentication code
4478 (which came originally from the Samba project). I have added a test to the
4479 spa_base64_to_bits() function which I hope fixes it.
4482 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4483 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4485 63. The daemon start-up calls getloadavg() while still root for those OS that
4486 need the first call to be done as root, but it missed one case: when
4487 deliver_queue_load_max is set with deliver_drop_privilege. This is
4488 necessary for the benefit of the queue runner, because there is no re-exec
4489 when deliver_drop_privilege is set.
4491 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4492 This has been fixed.
4494 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4495 was in use, was not putting the data itself into the right store pool;
4496 consequently, it could be overwritten for a subsequent message in the same
4497 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4500 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4502 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4503 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4504 the function were treating the return as a boolean value, which happened to
4505 work because 0=false and not-0=true, but is not correct code.
4507 68. The host_aton() function was not handling scoped IPv6 addresses (those
4508 with, for example, "%eth0" on the end) correctly.
4510 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4511 negated items (that is, ~something) in unsigned ints. Some compilers
4512 apparently mutter when there is no cast.
4514 70. If an address verification called from an ACL failed, and did not produce a
4515 user-specific message (i.e. there was only a "system" message), nothing was
4516 put in $acl_verify_message. In this situation, it now puts the system
4519 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4520 session; change 4.31/43 added the unwanted input to the log line - except
4521 that it did not do this in the start of session case. It now does.
4523 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4524 This is wrong and can cause the other end to generate a synchronization
4525 error if it is another Exim or anything else that does the synchronization
4526 check. A QUIT command is no longer sent after a timeout.
4528 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4529 during host lookups.
4531 74. The defer_ok option of callout verification was not working if it was used
4532 when verifying addresses in header lines, that is, for this case:
4534 verify = header_sender/callout=defer_ok
4536 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4537 those file descriptors could be used for SMTP connections. If anything
4538 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4539 could be sent to the SMTP client, causing chaos. The daemon now opens
4540 stdin, stdout, and stderr to /dev/null when it puts itself into the
4543 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4544 log by default. The user can override this with suitable Perl magic.
4546 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4547 the log message when discard triggers, was not working for the DATA ACL or
4548 for the non-SMTP ACL.
4550 78. Error message wording change in sieve.c.
4552 79. If smtp_accept_max_per_host was set, the number of connections could be
4553 restricted to fewer than expected, because the daemon was trying to set up
4554 a new connection before checking whether the processes handling previous
4555 connections had finished. The check for completed processes is now done
4556 earlier. On busy systems, this bug wouldn't be noticed because something
4557 else would have woken the daemon, and it would have reaped the completed
4560 80. If a message was submitted locally by a user whose login name contained one
4561 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4562 It caused a spool format error. I have fixed the spool reading code. A
4563 related problem was that the "from" clause in the Received: line became
4564 illegal because of the space(s). It is now covered by ${quote_local_part.
4566 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4569 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4571 83. Patch from Sieve maintainer to fix unterminated string problem in
4572 "vacation" handling.
4574 84. Some minor changes to the Linux configuration files to help with other
4575 OS variants using glibc.
4577 85. One more patch for Sieve to update vacation handling to latest spec.
4580 ----------------------------------------------------
4581 See the note above about the 4.44 and 4.50 releases.
4582 ----------------------------------------------------
4588 1. Change 4.43/35 introduced a bug that caused file counts to be
4589 incorrectly computed when quota_filecount was set in an appendfile
4592 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4593 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4596 3. Give more explanation in the error message when the command for a transport
4597 filter fails to execute.
4599 4. There are several places where Exim runs a non-Exim command in a
4600 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4601 was being done only for the command run by the queryprogram router. It is
4602 now done for all such subprocesses. The other cases are: ${run, transport
4603 filters, and the commands run by the lmtp and pipe transports.
4605 5. Some older OS have a limit of 256 on the maximum number of file
4606 descriptors. Exim was using setrlimit() to set 1000 as a large value
4607 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4608 systems. I've change it so that if it can't get 1000, it tries for 256.
4610 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4611 was an oversight, and furthermore, ever since the addition of extra
4612 controls (e.g. 4.43/32), the checks on when to allow different forms of
4613 "control" were broken. There should now be diagnostics for all cases when a
4614 control that does not make sense is encountered.
4616 7. $recipients is now available in the predata ACL (oversight).
4618 8. Tidy the search cache before the fork to do a delivery from a message
4619 received from the command line. Otherwise the child will trigger a lookup
4620 failure and thereby defer the delivery if it tries to use (for example) a
4621 cached ldap connection that the parent has called unbind on.
4623 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4624 of $address_data from the recipient verification was clobbered by the
4625 sender verification.
4627 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4628 was its contents. (It was OK if the option was not defined at all.)
4630 11. A "Completed" log line is now written for messages that are removed from
4631 the spool by the -Mrm option.
4633 12. $host_address is now set to the target address during the checking of
4634 ignore_target_hosts.
4636 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4637 being passed; this would have caused $sender_host_name to have been used if
4638 matching the list had actually called for a host name (not very likely,
4639 since this list is usually IP addresses). A host name is now passed as
4642 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4643 code that specifies a non-restarting handler (typically sigaction() in
4644 modern systems) in an attempt to fix a rare and obscure crash bug.
4646 15. Narrowed the window for a race in the daemon that could cause it to ignore
4647 SIGCHLD signals. This is not a major problem, because they are used only to
4648 wake it up if nothing else does.
4650 16. A malformed maildirsize file could cause Exim to calculate negative values
4651 for the mailbox size or file count. Odd effects could occur as a result.
4652 The maildirsize information is now recalculated if the size or filecount
4655 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4656 support for a long time. Removed HAVE_SYS_VFS_H.
4658 18. Updated exipick to current release from John Jetmore.
4660 19. Allow an empty sender to be matched against a lookup in an address list.
4661 Previously the only cases considered were a regular expression, or an
4664 20. Exim went into a mad DNS lookup loop when doing a callout where the
4665 host was specified on the transport, if the DNS lookup yielded more than
4668 21. The RFC2047 encoding function was originally intended for short strings
4669 such as real names; it was not keeping to the 75-character limit for
4670 encoded words that the RFC imposes. It now respects the limit, and
4671 generates multiple encoded words if necessary. To be on the safe side, I
4672 have increased the buffer size for the ${rfc2047: expansion operator from
4675 22. Failure to deliver a bounce message always caused it to be frozen, even if
4676 there was an errors_to setting on the router. The errors_to setting is now
4679 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4680 canonical form (fully expanded) before being placed in
4681 $sender_host_address.
4683 24. Updated eximstats to version 1.33
4685 25. Include certificate and key file names in error message when GnuTLS fails
4686 to set them up, because the GnuTLS error message doesn't include the name
4687 of the failing file when there is a problem reading it.
4689 26. Expand error message when OpenSSL has problems setting up cert/key files.
4692 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4693 (this can affect the format of dates).
4695 28. exim_tidydb, when checking for the continued existence of a message for
4696 which it has found a message-specific retry record, was not finding
4697 messages that were in split spool directories. Consequently, it was
4698 deleting retry records that should have stayed in existence.
4700 29. eximstats updated to version 1.35
4701 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4702 1.35 - bugfix such that pie charts by volume are generated correctly
4704 30. The SPA authentication driver was not abandoning authentication and moving
4705 on to the next authenticator when an expansion was forced to fail,
4706 contradicting the general specification for all authenticators. Instead it
4707 was generating a temporary error. It now behaves as specified.
4709 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4710 (the order specifies the preference for clients). The order is now AES256,
4711 AES128, 3DES, ARCFOUR128.
4713 31. Small patch to Sieve code - explicitly set From: when generating an
4716 32. Exim crashed if a remote delivery caused a very long error message to be
4717 recorded - for instance if somebody sent an entire SpamAssassin report back
4718 as a large number of 550 error lines. This bug was coincidentally fixed by
4719 increasing the size of one of Exim's internal buffers (big_buffer) that
4720 happened as part of the Exiscan merge. However, to be on the safe side, I
4721 have made the code more robust (and fixed the comments that describe what
4724 33. Some experimental protocols are using DNS PTR records for new purposes. The
4725 keys for these records are domain names, not reversed IP addresses. The
4726 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4727 leaves it alone. Component reversal etc. now happens only for IP addresses.
4730 34. The host_aton() function is supposed to be passed a string that is known
4731 to be a valid IP address. However, in the case of IPv6 addresses, it was
4732 not checking this. This is a hostage to fortune. Exim now panics and dies
4733 if the condition is not met. A case was found where this could be provoked
4734 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4735 components; fortuitously, this particular loophole had already been fixed
4736 by change 4.50/55 or 4.44/33 above.
4738 If there are any other similar loopholes, the new check in host_aton()
4739 itself should stop them being exploited. The report I received stated that
4740 data on the command line could provoke the exploit when Exim was running as
4741 exim, but did not say which command line option was involved. All I could
4742 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4743 running as the user.
4746 35. There was a buffer overflow vulnerability in the SPA authentication code
4747 (which came originally from the Samba project). I have added a test to the
4748 spa_base64_to_bits() function which I hope fixes it.
4751 36. The daemon start-up calls getloadavg() while still root for those OS that
4752 need the first call to be done as root, but it missed one case: when
4753 deliver_queue_load_max is set with deliver_drop_privilege. This is
4754 necessary for the benefit of the queue runner, because there is no re-exec
4755 when deliver_drop_privilege is set.
4757 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4758 was in use, was not putting the data itself into the right store pool;
4759 consequently, it could be overwritten for a subsequent message in the same
4760 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4763 38. Sometimes the final signoff response after QUIT could fail to get
4764 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4765 < 0 before doing a fflush(). This bug looks as though it goes back to the
4766 introduction of TLS in release 3.20, but "sometimes" must have been rare
4767 because the tests only now provoked it.
4773 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4774 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4775 Now it returns an integer. A number of calls were still expecting a T/F
4776 return. Fortuitously, in all cases, the tests worked in OK situations,
4777 which is the norm. However, things would have gone wrong on any write
4778 failures on the smtp file descriptor. This function is used when sending
4779 messages over SMTP and also when doing verify callouts.
4781 2. When Exim is called to do synchronous delivery of a locally submitted
4782 message (the -odf or -odi options), it no longer closes stderr before doing
4785 3. Implemented the mua_wrapper option.
4787 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4789 5. Implemented the functions header_remove(), header_testname(),
4790 header_add_at_position(), and receive_remove_recipient(), and exported them
4793 6. If an ACL "warn" statement specified the addition of headers, Exim already
4794 inserted X-ACL-Warn: at the start if there was no header name. However, it
4795 was not making this test for the second and subsequent header lines if
4796 there were newlines in the string. This meant that an invalid header could
4797 be inserted if Exim was badly configured.
4799 7. Allow an ACL "warn" statement to add header lines at the start or after all
4800 the Received: headers, as well as at the end.
4802 8. Added the rcpt_4xx retry error code.
4804 9. Added postmaster_mailfrom=xxx to callout verification option.
4806 10. Added mailfrom=xxxx to the callout verification option, for verify=
4809 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4810 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4812 12. Inserted some casts to stop certain compilers warning when using pointer
4813 differences as field lengths or precisions in printf-type calls (mostly
4814 affecting debugging statements).
4816 13. Added optional readline() support for -be (dynamically loaded).
4818 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4819 same clock tick as a message's arrival, so that its received time was the
4820 same as the "first fail" time on the retry record, and that message
4821 remained on the queue past the ultimate address timeout, every queue runner
4822 would try a delivery (because it was past the ultimate address timeout) but
4823 after another failure, the ultimate address timeout, which should have then
4824 bounced the address, did not kick in. This was a "< instead of <=" error;
4825 in most cases the first failure would have been in the next clock tick
4826 after the received time, and all would be well.
4828 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4829 being recognized when the domain list was tested by the match_domain
4830 condition in an expansion string.
4832 16. Added the ${str2b64: operator.
4834 17. Exim was always calling setrlimit() to set a large limit for the number of
4835 processes, without checking whether the existing limit was already
4836 adequate. (It did check for the limit on file descriptors.) Furthermore,
4837 errors from getrlimit() and setrlimit() were being ignored. Now they are
4838 logged to the main and panic logs, but Exim does carry on, to try to do its
4839 job under whatever limits there are.
4841 18. Imported PCRE 5.0.
4843 19. Trivial typo in log message " temporarily refused connection" (the leading
4846 20. If the log selector return_path_on_delivery was set and an address was
4847 redirected to /dev/null, the delivery process crashed because it assumed
4848 that a return path would always be set for a "successful" delivery. In this
4849 case, the whole delivery is bypassed as an optimization, and therefore no
4852 21. Internal re-arrangement: the function for sending a challenge and reading
4853 a response while authentication was assuming a zero-terminated challenge
4854 string. It's now changed to take a pointer and a length, to allow for
4855 binary data in such strings.
4857 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4859 23. Exim was not respecting finduser_retries when seeking the login of the
4860 uid under which it was called; it was always trying 10 times. (The default
4861 setting of finduser_retries is zero.) Also, it was sleeping after the final
4862 failure, which is pointless.
4864 24. Implemented tls_on_connect_ports.
4866 25. Implemented acl_smtp_predata.
4868 26. If the domain in control=submission is set empty, Exim assumes that the
4869 authenticated id is a complete email address when it generates From: or
4870 Sender: header lines.
4872 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4873 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4874 chown and chgrp in /bin and hostname in /usr/bin.
4876 28. Exim was keeping the "process log" file open after each use, just as it
4877 does for the main log. This opens the possibility of it remaining open for
4878 long periods when the USR1 signal hits a daemon. Occasional processlog
4879 errors were reported, that could have been caused by this. Anyway, it seems
4880 much more sensible not to leave this file open at all, so that is what now
4883 29. The long-running daemon process does not normally write to the log once it
4884 has entered its main loop, and it closes the log before doing so. This is
4885 so that log files can straightforwardly be renamed and moved. However,
4886 there are a couple of unusual error situations where the daemon does write
4887 log entries, and I had neglected to close the log afterwards.
4889 30. The text of an SMTP error response that was received during a remote
4890 delivery was being truncated at 512 bytes. This is too short for some of
4891 the long messages that one sometimes sees. I've increased the limit to
4894 31. It is now possible to make retry rules that apply only when a message has a
4895 specific sender, in particular, an empty sender.
4897 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4898 it possible to be selective about when SMTP synchronization is enforced.
4900 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4902 32. Implemented hosts_connection_nolog.
4904 33. Added an ACL for QUIT.
4906 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4909 35. Added mailbox_size and mailbox_filecount to appendfile.
4911 36. Added control = no_multiline_responses to ACLs.
4913 37. There was a bug in the logic of the code that waits for the clock to tick
4914 in the case where the clock went backwards by a substantial amount such
4915 that the microsecond fraction of "now" was more than the microsecond
4916 fraction of "then" (but the whole seconds number was less).
4918 38. Added support for the libradius Radius client library this is found on
4919 FreeBSD (previously only the radiusclient library was supported).
4925 1. When certain lookups returned multiple values in the form name=value, the
4926 quoting of the values was not always being done properly. Specifically:
4927 (a) If the value started with a double quote, but contained no whitespace,
4929 (b) If the value contained whitespace other than a space character (i.e.
4930 tabs or newlines or carriage returns) it was not quoted.
4931 This fix has been applied to the mysql and pgsql lookups by writing a
4932 separate quoting function and calling it from the lookup code. The fix
4933 should probably also be applied to nisplus, ibase and oracle lookups, but
4934 since I cannot test any of those, I have not disturbed their existing code.
4936 2. A hit in the callout cache for a specific address caused a log line with no
4937 reason for rejecting RCPT. Now it says "Previous (cached) callout
4938 verification failure".
4940 3. There was an off-by-one bug in the queryprogram router. An over-long
4941 return line was truncated at 256 instead of 255 characters, thereby
4942 overflowing its buffer with the terminating zero. As well as fixing this, I
4943 have increased the buffer size to 1024 (and made a note to document this).
4945 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4946 when Exim is waiting for an SMTP response from a remote server, Exim
4947 restarts its select() call on the socket, thereby resetting its timeout.
4948 This is not a problem when such interrupts are rare. Somebody set up a cron
4949 job to run exiwhat every 2 minutes, which is less than the normal select()
4950 timeout (5 or 10 minutes). This meant that the select() timeout never
4951 kicked in because it was always reset. I have fixed this by comparing the
4952 time when an interrupt arrives with the time at the start of the first call
4953 to select(). If more time than the timeout has elapsed, the interrupt is
4954 treated as a timeout.
4956 5. Some internal re-factoring in preparation for the addition of Sieve
4957 extensions (by MH). In particular, the "personal" test is moved to a
4958 separate function, and given an option for scanning Cc: and Bcc: (which is
4959 not set for Exim filters).
4961 6. When Exim created an email address using the login of the caller as the
4962 local part (e.g. when creating a From: or Sender: header line), it was not
4963 quoting the local part when it contained special characters such as @.
4965 7. Installed new OpenBSD configuration files.
4967 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4968 try to make them clearer.
4970 9. Callout options, other than the timeout value, were being ignored when
4971 verifying sender addresses in header lines. For example, when using
4973 verify = header_sender/callout=no_cache
4975 the cache was (incorrectly) being used.
4977 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4978 only the Cygwin environment.
4980 11. When return_path_on_delivery was set as a log selector, if different remote
4981 addresses in the same message used different return paths and parallel
4982 remote delivery occurred, the wrong values would sometimes be logged.
4983 (Whenever a remote delivery process finished, the return path value from
4984 the most recently started remote delivery process was logged.)
4986 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4987 lines when AUTH and/or TLS are in use. This is the "received protocol"
4988 field. Exim used to use "asmtp" for authenticated SMTP, without any
4989 indication (in the protocol name) for TLS use. Now it follows the RFC and
4990 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4991 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4992 names appear in log lines as well as in Received: header lines.
4994 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4995 extensions, and comparison tests, and to fix some bugs.
4997 14. Changes to the "personal" filter test:
4999 (1) The test was buggy in that it was just doing the equivalent of
5000 "contains" tests on header lines. For example, if a user's address was
5001 anne@some.where, the "personal" test would incorrectly be true for
5003 To: susanne@some.where
5005 This test is now done by extracting each address from the header in turn,
5006 and checking the entire address. Other tests that are part of "personal"
5007 are now done using regular expressions (for example, to check local parts
5008 of addresses in From: header lines).
5010 (2) The list of non-personal local parts in From: addresses has been
5011 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5012 taken from the Sieve specification recommendations.
5014 (3) If the message contains any header line starting with "List-" it is
5015 treated as non-personal.
5017 (4) The test for "circular" in the Subject: header line has been removed
5018 because it now seems ill-conceived.
5020 15. Minor typos in src/EDITME comments corrected.
5022 16. Installed latest exipick from John Jetmore.
5024 17. If headers_add on a router specified a text string that was too long for
5025 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5026 of string_sprintf() is now avoided.
5028 18. $message_body_size was not set (it was always zero) when running the DATA
5029 ACL and the local_scan() function.
5031 19. For the "mail" command in an Exim filter, no default was being set for
5032 the once_repeat time, causing a random time value to be used if "once" was
5033 specified. (If the value happened to be <= 0, no repeat happened.) The
5034 default is now 0s, meaning "never repeat". The "vacation" command was OK
5035 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5036 (I found it when inspecting the code).
5038 20. There is now an overall timeout for performing a callout verification. It
5039 defaults to 4 times the callout timeout, which applies to individual SMTP
5040 commands during the callout. The overall timeout applies when there is more
5041 than one host that can be tried. The timeout is checked before trying the
5042 next host. This prevents very long delays if there are a large number of
5043 hosts and all are timing out (e.g. when the network connections are timing
5044 out). The value of the overall timeout can be changed by specifying an
5045 additional sub-option for "callout", called "maxwait". For example:
5047 verify = sender/callout=5s,maxwait=20s
5049 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5050 to the end before writing, but this should make it even safer).
5052 22. Exim was forgetting that it had advertised PIPELINING for the second and
5053 subsequent messages on an SMTP connection. It was also not resetting its
5054 memory on STARTTLS and an internal HELO.
5056 23. When Exim logs an SMTP synchronization error within a session, it now
5057 records whether PIPELINING has been advertised or not.
5059 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5060 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5061 rather than long int.
5063 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5065 26. Added the never_mail option to autoreply.
5071 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5072 crash if the getsockname() call failed; this can happen if a connection is
5073 closed very soon after it is established. The problem was simply in the
5074 order in which certain operations were done, causing Exim to try to write
5075 to the SMTP stream before it had set up the file descriptor. The bug has
5076 been fixed by making things happen in the correct order.
5082 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5083 before the connection was closed, thus losing the rejection response.
5085 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5086 some early Solaris releases, but causes trouble in current releases where
5087 socklen_t is defined.
5089 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5092 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5095 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5096 that releasing the top of it at the end releases what was used for sub-
5097 expansions (unless the block got too big). However, discard this block if
5098 the first thing is a variable or header, so that we can use its block when
5099 it is dynamic (useful for very large $message_headers, for example).
5101 6. Lookups now cache *every* query, not just the most recent. A new, separate
5102 store pool is used for this. It can be recovered when all lookup caches are
5103 flushed. Lookups now release memory at the end of their result strings.
5104 This has involved some general refactoring of the lookup sources.
5106 7. Some code has been added to the store_xxx() functions to reduce the amount
5107 of flapping under certain conditions.
5109 8. log_incoming_interface used to affect only the <= reception log lines. Now
5110 it causes the local interface and port to be added to several more SMTP log
5111 lines, for example "SMTP connection from", and rejection lines.
5113 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5115 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5117 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5118 could be overwritten at the end of the current message (or the start of a
5119 new message if it was set in a HELO ACL). The value is now preserved for
5120 the duration of the SMTP connection.
5122 12. If a transport had a headers_rewrite setting, and a matching header line
5123 contained an unqualified address, that address was qualified, even if it
5124 did not match any rewriting rules. The underlying bug was that the values
5125 of the flags that permit the existence of unqualified sender and recipient
5126 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5127 non-local messages, and by -bnq for local messages) were not being
5128 preserved with the message after it was received.
5130 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5131 "next input=" as part of the text comprising the host identity instead of
5132 the correct text. The code was using the same buffer for two different
5133 strings. However, depending on which order the printing function evaluated
5134 its arguments, the bug did not always show up. Under Linux, for example, my
5135 test suite worked just fine.
5137 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5138 doesn't work with some older versions of Perl. It has been changed to "my",
5139 which in any case is probably the better facility to use.
5141 15. A really picky compiler found some instances of statements for creating
5142 error messages that either had too many or two few arguments for the format
5145 16. The size of the buffer for calls to the DNS resolver has been increased
5146 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5147 for addresses that have a lot of PTR records. This alleviates a problem; it
5148 does not fully solve it.
5150 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5151 buffer now truncates the list and logs the incident, which is the same
5152 action as happens when Exim is looking up a host name and its aliases.
5153 Previously in this situation something unpredictable would happen;
5154 sometimes it was "internal error: store_reset failed".
5156 18. If a server dropped the connection unexpectedly when an Exim client was
5157 using GnuTLS and trying to read a response, the client delivery process
5158 crashed while trying to generate an error log message.
5160 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5161 string, for example:
5163 warn message = H1: something\nH2: something
5165 the text was added as a single header line from Exim's point of view
5166 though it ended up OK in the delivered message. However, searching for the
5167 second and subsequent header lines using $h_h2: did not work. This has been
5168 fixed. Similarly, if a system filter added multiple headers in this way,
5169 the routers could not see them.
5171 20. Expanded the error message when iplsearch is called with an invalid key to
5172 suggest using net-iplsearch in a host list.
5174 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5175 ACLs are no longer actually imposed (and a message to that effect is
5178 22. If a "gecos" field in a passwd entry contained escaped characters, in
5179 particular, if it contained a \" sequence, Exim got it wrong when building
5180 a From: or a Sender: header from that name. A second bug also caused
5181 incorrect handling when an unquoted " was present following a character
5182 that needed quoting.
5184 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5185 was not being matched caselessly.
5187 24. Arranged for all hyphens in the exim.8 source to be escaped with
5190 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5191 properly. Recipient callout cache records were still being keyed to include
5192 the sender, even when use_sender was set false. This led to far more
5193 callouts that were necessary. The sender is no longer included in the key
5194 when use_sender is false.
5196 26. Added "control = submission" modifier to ACLs.
5198 27. Added the ${base62d: operator to decode base 62 numbers.
5200 28. dnsdb lookups can now access SRV records.
5202 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5203 the configuration file.
5205 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5206 (-v) mode. This makes the output for a verbose queue run more intelligible.
5208 31. Added a use_postmaster feature to recipient callouts.
5210 32. Added the $body_zerocount variable, containing the number of binary zero
5211 bytes in the message body.
5213 33. The time of last modification of the "new" subdirectory is now used as the
5214 "mailbox time last read" when there is a quota error for a maildir
5217 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5219 35. Added +ignore_unknown as a special item in host lists.
5221 36. Code for decoding IPv6 addresses in host lists is now included, even if
5222 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5223 address was recognized as an IP address, but was then not correctly decoded
5224 into binary, causing unexpected and incorrect effects when compared with
5231 1. Very minor rewording of debugging text in manualroute to say "list of
5232 hosts" instead of "hostlist".
5234 2. If verify=header_syntax was set, and a header line with an unqualified
5235 address (no domain) and a large number of spaces between the end of the
5236 name and the colon was received, the reception process suffered a buffer
5237 overflow, and (when I tested it) crashed. This was caused by some obsolete
5238 code that should have been removed. The fix is to remove it!
5240 3. When running in the test harness, delay a bit after writing a bounce
5241 message to get a bit more predictability in the log output.
5243 4. Added a call to search_tidyup() just before forking a reception process. In
5244 theory, someone could use a lookup in the expansion of smtp_accept_max_
5245 per_host which, without the tidyup, could leave open a database connection.
5247 5. Added the variables $recipient_data and $sender_data which get set from a
5248 lookup success in an ACL "recipients" or "senders" condition, or a router
5249 "senders" option, similar to $domain_data and $local_part_data.
5251 6. Moved the writing of debug_print from before to after the "senders" test
5254 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5255 problems for message scanning, either using a data ACL, or using
5256 local_scan() because the Received: header was not generated till after they
5257 were called (in order to set the time as the time of reception completion).
5258 I have revised the way this works. The header is now generated after the
5259 body is received, but before the ACL or local_scan() are called. After they
5260 are run, the timestamp in the header is updated.
5266 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5267 before starting a queue runner without re-exec. This happened only when
5268 deliver_drop_privilege was set or when the Exim user was set to root. The
5269 effect of the bug was that timeouts during subsequent deliveries caused
5270 crashes instead of being properly handled. The handler is now left at its
5271 default (and expected) setting.
5273 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5274 message, again when deliver_drop_privilege is set or Exim is run as root.
5275 The bug described in (1) was not present in this case, but the tidying up
5276 of the other signals was missing. I have made the two cases consistent.
5278 3. The ignore_target_hosts setting on a manualroute router was being ignored
5279 for hosts that were looked up using the /MX notation.
5281 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5284 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5285 operated on the sender address. After changing the $sender_address to <>
5286 for the sender address verify, Exim was re-instated it as the original
5287 (before rewriting) address, but remembering that it had rewritten it, so it
5288 wasn't rewriting it again. This bug also had the effect of breaking the
5289 sender address verification caching when the sender address was rewritten.
5291 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5292 This has been changed so that if the ip literal address matches
5293 ignore_target_hosts, the router declines.
5295 7. Added expansion conditions match_domain, match_address, and match_local_
5296 part (NOT match_host).
5298 8. The placeholder for the Received: header didn't have a length field set.
5300 9. Added code to Exim itself and to exim_lock to test for a specific race
5301 condition that could lead to file corruption when using MBX delivery. The
5302 issue is with the lockfile that is created in /tmp. If this file is removed
5303 after a process has opened it but before that process has acquired a lock,
5304 there is the potential for a second process to recreate the file and also
5305 acquire a lock. This could lead to two Exim processes writing to the file
5306 at the same time. The added code performs the same test as UW imapd; it
5307 checks after acquiring the lock that its file descriptor still refers to
5308 the same named file.
5310 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5311 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5314 11. Added the smtp_active_hostname option. If used, this will typically be made
5315 to depend on the incoming interface address. Because $interface_address is
5316 not set up until the daemon has forked a reception process, error responses
5317 that can happen earlier (such as "too many connections") no longer contain
5320 12. If an expansion in a condition on a "warn" statement fails because a lookup
5321 defers, the "warn" statement is abandoned, and the next ACL statement is
5322 processed. Previously this caused the whole ACL to be aborted.
5324 13. Added the iplsearch lookup type.
5326 14. Added ident_timeout as a log selector.
5328 15. Added tls_certificate_verified as a log selector.
5330 16. Added a global option tls_require_ciphers (compare the smtp transport
5331 option of the same name). This controls incoming TLS connections.
5333 17. I finally figured out how to make tls_require_ciphers do a similar thing
5334 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5335 before starting the TLS session.
5337 18. Tabs are now shown as \t in -bP output.
5339 19. If the log selector return_path_on_delivery was set, Exim crashed when
5340 bouncing a message because it had too many Received: header lines.
5342 20. If two routers both had headers_remove settings, and the first one included
5343 a superfluous trailing colon, the final name in the first list and the
5344 first name in the second list were incorrectly joined into one item (with a
5345 colon in the middle).
5351 1. Added -C and -D options to the exinext utility, mainly to make it easier
5352 to include in the automated testing, but these could be helpful when
5353 multiple configurations are in use.
5355 2. The exinext utility was not formatting the output nicely when there was
5356 an alternate port involved in the retry record key, nor when there was a
5357 message id as well (for retries that were specific to a specific message
5358 and a specific host). It was also confused by IPv6 addresses, because of
5359 the additional colons they contain. I have fixed the IPv4 problem, and
5360 patched it up to do a reasonable job for IPv6.
5362 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5363 delivery, the log line now contains "pipelined" if PIPELINING was used.
5365 4. An SMTP transport process used to panic and die if the bind() call to set
5366 an explicit outgoing interface failed. This has been changed; it is now
5367 treated in the same way as a connect() failure.
5369 5. A reference to $sender_host_name in the part of a conditional expansion
5370 that was being skipped was still causing a DNS lookup. This no longer
5373 6. The def: expansion condition was not recognizing references to header lines
5374 that used bh_ and bheader_.
5376 7. Added the _cache feature to named lists.
5378 8. The code for checking quota_filecount in the appendfile transport was
5379 allowing one more file than it should have been.
5381 9. For compatibility with Sendmail, the command line option
5389 and sets the incoming protocol and host name (for trusted callers). The
5390 host name and its colon can be omitted when only the protocol is to be set.
5391 Note the Exim already has two private options, -pd and -ps, that refer to
5392 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5393 "s", but I don't think that's a major issue.
5395 10. A number of refactoring changes to the code, none of which should affect
5398 (a) The number of logging options was getting close to filling up the
5399 32-bit word that was used as a bit map. I have split them into two classes:
5400 those that are passed in the argument to log_write(), and those that are
5401 only ever tested independently outside of that function. These are now in
5402 separate 32-bit words, so there is plenty of room for expansion again.
5403 There is no change in the user interface or the logging behaviour.
5405 (b) When building, for example, log lines, the code previously used a
5406 macro that called string_cat() twice, in order to add two strings. This is
5407 not really sufficiently general. Furthermore, there was one instance where
5408 it was actually wrong because one of the argument was used twice, and in
5409 one call a function was used. (As it happened, calling the function twice
5410 did not affect the overall behaviour.) The macro has been replaced by a
5411 function that can join an arbitrary number of extra strings onto a growing
5414 (c) The code for expansion conditions now uses a table and a binary chop
5415 instead of a serial search (which was left over from when there were very
5416 few conditions). Also, it now recognizes conditions like "pam" even when
5417 the relevant support is not compiled in: a suitably worded error message is
5418 given if an attempt is made to use such a condition.
5420 11. Added ${time_interval:xxxxx}.
5422 12. A bug was causing one of the ddress fields not to be passed back correctly
5423 from remote delivery subprocesses. The field in question was not being
5424 subsequently used, so this caused to problems in practice.
5426 13. Added new log selectors queue_time and deliver_time.
5428 14. Might have fixed a bug in maildirsizefile handling that threw up
5429 "unexpected character" debug warnings, and recalculated the data
5430 unnecessarily. In any case, I expanded the warning message to give more
5433 15. Added the message "Restricted characters in address" to the statements in
5434 the default ACL that block characters like @ and % in local parts.
5436 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5437 Three changes have been made:
5439 (a) There was a serious bug; a negative response to MAIL caused the whole
5440 recipient domain to be cached as invalid, thereby blocking all messages
5441 to all local parts at the same domain, from all senders. This bug has
5442 been fixed. The domain is no longer cached after a negative response to
5443 MAIL if the sender used is not empty.
5445 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5448 (c) A new callout option, "use_sender" has been added for people who want
5449 the modified behaviour.
5455 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5458 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5459 indeed breaks things for older releases.
5461 3. Added additional logging to the case where there is a problem reading data
5462 from a filter that is running in a subprocess using a pipe, in order to
5463 try to track down a specific problem.
5465 4. Testing facility fudge: when running in the test harness and attempting
5466 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5467 getting "No route to host". Convert this to a timeout.
5469 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5472 6. Some OS don't have socklen_t but use size_t instead. This affects the
5473 fifth argument of getsockopt() amongst other things. This is now
5474 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5475 can be set for individual OS. I have set it for SunOS5, OSF1, and
5476 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5477 some earlier ones do not.
5479 7. Change 4.30/15 was not doing the test caselessly.
5481 8. The standard form for an IPv6 address literal was being rejected by address
5482 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5483 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5484 this, as well as the form without the "IPv6" on the front (but only when
5485 address literals are enabled, of course).
5487 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5489 10. Exim crashed if a message with an empty sender address specified by -f
5490 encountered a router with an errors_to setting. This could be provoked only
5491 by a command such as
5495 where an empty string was supplied; "<>" did not hit this bug.
5497 11. Installed PCRE release 4.5.
5499 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5500 remained set. It is now erased.
5502 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5503 times from message ids (which are base 36 rather than the normal 62).
5505 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5506 were being counted as actual protocol errors, and logged if the log
5507 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5508 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5509 and DATA following a set of rejected RCPTs do not count as protocol errors.
5510 In other words, Exim assumes they were pipelined, though this may not
5511 actually be the case. Of course, in all cases the client gets an
5512 appropriate error code.
5514 15. If a lookup fails in an ACL condition, a message about the failure may
5515 be available; it is used if testing the ACL cannot continue, because most
5516 such messages specify what the cause of the deferral is. However, some
5517 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5518 that caused an old message to be retained and used if a later statement
5519 caused a defer, replacing the real cause of the deferral.
5521 16. If an IP address had so many PTR records that the DNS lookup buffer
5522 was not large enough to hold them, Exim could crash while trying to process
5523 the truncated data. It now detects and logs this case.
5525 17. Further to 4.21/58, another change has been made: if (and only if) the
5526 first line of a message (the first header line) ends with CRLF, a bare LF
5527 in a subsequent header line has a space inserted after it, so as not to
5528 terminate the header.
5530 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5531 unnecessarily, used atoi() instead of strtol(), and didn't check the
5532 termination when getting file sizes from file names by regex.
5534 19. Completely re-implemented the support for maildirsize files, in the light
5535 of a number of problems with the previous contributed implementation
5536 (4.30/29). In particular:
5538 . If the quota is zero, the maildirsize file is maintained, but no quota is
5541 . If the maildir directory does not exist, it is created before any attempt
5542 to write a maildirsize file.
5544 . The quota value in the file is just a cache; if the quota is changed in
5545 the transport, the new value overrides.
5547 . A regular expression is available for excluding directories from the
5550 20. The autoreply transport checks the characters in options that define the
5551 message's headers; it allows continued headers, but it was checking with
5552 isspace() after an embedded newline instead of explicitly looking for a
5555 21. If all the "regular" hosts to which an address was routed had passed their
5556 expiry times, and had not reached their retry times, the address was
5557 bounced, even if fallback hosts were defined. Now Exim should go on to try
5560 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5561 equivalent code in the SMTP transport. Some hosts send humungous responses
5562 to HELO/EHLO, more than 1024 it seems.
5564 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5565 gives compiler warnings in some environments. I've now done it "properly",
5568 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5569 (because of problems with the built-in one) was declared to return uschar *
5570 instead of char *, causing compiler failure.
5572 25. Fixed a file descriptor leak when processing alias/forward files.
5574 26. Fixed a minor format string issue in dbfn.c.
5576 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5578 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5579 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5582 29. When a sender address is verified, it is cached, to save repeating the test
5583 when there is more than one recipient in a message. However, when the
5584 verification involves a callout, it is possible for different callout
5585 options to be set for different recipients. It is too complicated to keep
5586 track of this in the cache, so now Exim always runs a verification when a
5587 callout is required, relying on the callout cache for the optimization.
5588 The overhead is duplication of the address routing, but this should not be
5591 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5592 to be verified with callout=postmaster, and the main callout worked but the
5593 postmaster check failed, the verification correctly failed. However, if a
5594 subsequent RCPT command asked for sender verification *without* the
5595 postmaster check, incorrect caching caused this verification also to fail,
5598 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5599 it was not caching the DNS options (qualify_single, search_parents) that
5600 were used when the lookup failed. A subsequent lookup with different
5601 options therefore always gave the same answer, though there were cases
5602 where it should not have. (Example: a "domains = !$mx_any" option on a
5603 dnslookup router: the "domains" option is always processed without any
5604 widening, but the router might have qualify_single set.) Now Exim uses the
5605 cached value only when the same options are set.
5607 32. Added John Jetmore's "exipick" utility to the distribution.
5609 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5610 than a timeout (e.g. a certificate is required, and is not provided), an
5611 Exim server now closes the connection immediately. Previously it waited for
5612 the client to close - but if the client is SSL, it seems that they each
5613 wait for each other, leading to a delay before one of them times out.
5615 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5616 maintained 0.8.x compatibility because I don't think many are using it, and
5617 it is clearly obsolete.
5619 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5622 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5623 client certificate was expired. A simple patch fixes this, though I don't
5624 understand the full logic of why the verify callback is called multiple
5627 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5628 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5629 which causes problems with some clients (such as the Certicom SSL Plus
5630 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5631 disables the coutermeasure allowing Eudora to connect."
5633 38. Exim was not checking that a write() to a log file succeeded. This could
5634 lead to Bad Things if a log got too big, in particular if it hit a file
5635 size limit. Exim now panics and dies if it cannot write to a log file, just
5636 as it does if it cannot open a log file.
5638 39. Modified OS/Makefile-Linux so that it now contains
5640 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5642 The two -D definitions ensure that Exim is compiled with large file
5643 support, which makes it possible to handle log files that are bigger than
5646 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5647 instance) a domain was checked against a named list that involved a lookup,
5648 causing $domain_data to be set, then another domain was checked against the
5649 same list, then the first domain was re-checked, the value of $domain_data
5650 after the final check could be wrong. In particular, if the second check
5651 failed, it could be set empty. This bug probably also applied to
5654 41. The strip_trailing_dot option was not being applied to the address given
5655 with the -f command-line option.
5657 42. The code for reading a message's header from the spool was incrementing
5658 $received_count, but never initializing it. This meant that the value was
5659 incorrect (doubled) while delivering a message in the same process in which
5660 it was received. In the most common configuration of Exim, this never
5661 happens - a fresh exec is done - but it can happen when
5662 deliver_drop_privilege is set.
5664 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5665 it now includes up to 150 characters of the unexpected data in the log
5668 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5669 and building data strings. The size of both of these buffers was 10 000
5670 bytes - far larger than anybody would *ever* want, thought I. Needless to
5671 say, somebody hit the limit. I have increased the maximum line length to
5672 20 000 and the maximum data length of concatenated lines to 100 000. I have
5673 also fixed two bugs, because there was no checking on these buffers. Tsk,
5674 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5675 buffer is too small.
5677 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5678 lsearch lookups. Now it does.
5680 46. When parsing a route_list item in a manualroute router, a fixed-length
5681 buffer was used for the list of hosts. I made this 1024 bytes long,
5682 thinking that nobody would ever have a list of hosts that long. Wrong.
5683 Somebody had a whole pile of complicated expansion conditions, and the
5684 string was silently truncated, leading to an expansion error. It turns out
5685 that it is easier to change to an unlimited length (owing to other changes
5686 that have happened since this code was originally written) than to build
5687 structure for giving a limitation error. The length of the item that
5688 expands into the list of hosts is now unlimited.
5690 47. The lsearch lookup could not handle data where the length of text line was
5691 more than 4095 characters. Such lines were truncated, leading to shortened
5692 data being returned. It should now handle lines of any length.
5694 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5695 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5698 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5699 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5700 no longer happens in comment lines. A list of replacements is now placed
5701 at the head of all of the source files, except those whose only change is
5702 to replace PERL_COMMAND in the very first #! line.
5704 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5705 messages on the queue, with a bottom-up merge sort, using code contributed
5706 by Michael Haardt. This should make operations like -bp somewhat faster on
5707 large queues. It won't affect queue runners, except when queue_run_in_order
5710 51. Installed eximstats 1.31 in the distribution.
5712 52. Added support for SRV lookups to the dnslookup router.
5714 53. If an ACL referred to $message_body or $message_body_end, the value was not
5715 reset for any messages that followed in the same SMTP session.
5717 54. The store-handling optimization for building very long strings was not
5718 differentiating between the different store pools. I don't think this
5719 actually made any difference in practice, but I've tidied it.
5721 55. While running the routers to verify a sender address, $sender_address
5722 was still set to the sender address. This is wrong, because when routing to
5723 send a bounce to the sender, it would be empty. Therefore, I have changed
5724 it so that, while verifying a sender address, $sender_address is set to <>.
5725 (There is no change to what happens when verifying a recipient address.)
5727 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5728 target A or AAAA records (if not already returned) without resetting the
5729 qualify_single or search_parents options of the DNS resolver. These are
5730 inappropriate in this case because the targets of MX and SRV records must
5731 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5732 target that, when qualified, matched something in the local domain. These
5733 two options are now turned off when doing these lookups.
5735 57. It seems that at least some releases of Reiserfs (which does not have the
5736 concept of a fixed number of inodes) returns zero and not -1 for the
5737 number of available inodes. This interacted badly with check_spool_inodes,
5738 which assumed that -1 was the "no such thing" setting. What I have done is
5739 to check that the total number of inodes is greater than zero before doing
5740 the test of how many are available.
5742 58. When a "warn" ACL statement has a log_message modifier, the message is
5743 remembered, and not repeated. This is to avoid a lot of repetition when a
5744 message has many recipients that cause the same warning to be written.
5745 However, Exim was preserving the list of already written lines for an
5746 entire SMTP session, which doesn't seem right. The memory is now reset if a
5747 new message is started.
5749 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5750 debugging output unless log_rewrite was also set.
5752 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5753 of (int)(handle) when we know that handle contains (void *)(-1).
5755 61. The Exim daemon panic-logs an error return when it closes the incoming
5756 connection. However "connection reset by peer" seems to be common, and
5757 isn't really an error worthy of noting specially, so that particular error
5760 62. When Exim is trying to find all the local interfaces, it used to panic and
5761 die if the ioctl to get the interface flags failed. However, it seems that
5762 on at least one OS (Solaris 9) it is possible to have an interface that is
5763 included in the list of interfaces, but for which you get a failure error
5764 for this call. This happens when the interface is not "plumbed" into a
5765 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5766 failure of the "get flags" call assumes that the interface is down.
5768 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5769 makes life easier for people who are doing arithmetic on fields extracted
5770 from dates, where you often get leading zeros that should not be
5771 interpreted as octal.
5773 64. Added qualify_domain to the redirect router, to override the global
5776 65. If a pathologically long header line contained very many addresses (the
5777 report of this problem mentioned 10 000) and each of them was rewritten,
5778 Exim could use up a very large amount of memory. (It kept on making new
5779 copies of the header line as it rewrote, and never released the old ones.)
5780 At the expense of a bit more processing, the header rewriting function has
5781 been changed so that it no longer eats memory in this way.
5783 66. The generation of the Received: header has been moved from the time that a
5784 message starts to be received, to the time that it finishes. The timestamp
5785 in the Received: header should now be very close to that of the <= log
5786 line. There are two side-effects of this change:
5788 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5789 logged header lines no longer include the local Received: line, because
5790 it has not yet been created. The same applies to a copy of the message
5791 that is returned to a non-SMTP sender when a message is rejected.
5793 (b) When a filter file is tested using -bf, no additional Received: header
5794 is added to the test message. After some thought, I decided that this
5797 This change does not affect the value of $received_for. It is still set
5798 after address rewriting, but before local_scan() is called.
5800 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5802 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5803 gave an unhelpful panic error message, and a defer error. I have managed to
5804 change this behaviour so that it now rejects any supplied certificate,
5805 which seems right, as the list of acceptable certificates is empty.
5807 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5808 gave an unhelpful defer error. I have not managed to make this reject any
5809 supplied certificates, but the error message it gives is "no certificate
5810 supplied", which is not helpful.
5812 70. exigrep's output now also includes lines that are not associated with any
5813 message, but which match the given pattern. Implemented by a patch from
5814 Martin Sluka, which also tidied up the Perl a bit.
5816 71. Recipient callout verification, like sender verification, was using <> in
5817 the MAIL FROM command. This isn't really the right thing, since the actual
5818 sender may affect whether the remote host accepts the recipient or not. I
5819 have changed it to use the actual sender in the callout; this means that
5820 the cache record is now keyed on a recipient/sender pair, not just the
5821 recipient address. There doesn't seem to be a real danger of callout loops,
5822 since a callout by the remote host to check the sender would use <>.
5823 [SEE ABOVE: changed after hitting problems.]
5825 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5826 temporary errors. However, in the case of such a code being given after
5827 the end of a data transmission (i.e. after ".") Exim was failing to write
5828 a retry record for the message. (Yes, there was some broken host that was
5829 actually sending 8xx at this point.)
5831 73. An unknown lookup type in a host list could cause Exim to panic-die when
5832 the list was checked. (An example that provoked this was putting <; in the
5833 middle of a list instead of at the start.) If this happened during a DATA
5834 ACL check, a -D file could be left lying around. This kind of configuration
5835 error no longer causes Exim to die; instead it causes a defer error. The
5836 incident is still logged to the main and panic logs.
5838 74. Buglet left over from Exim 3 conversion. The message "too many messages
5839 in one connection" was written to the rejectlog but not the mainlog, except
5840 when address rewriting (yes!) was being logged.
5842 75. Added write_rejectlog option.
5844 76. When a system filter was run not as root (that is, when system_filter_user
5845 was set), the values of the $n variables were not being returned to the
5846 main process; thus, they were not subsequently available in the $sn
5849 77. Added +return_path_on_delivery log selector.
5851 78. A connection timeout was being treated differently from recipients deferred
5852 when testing hosts_max_try with a message that was older than the host's
5853 retry timeout. (The host should not be counted, thus allowing all hosts to
5854 be tried at least once before bouncing.) This may have been the cause of an
5855 occasionally reported bug whereby a message would remain on the queue
5856 longer than the retry timeout, but would be bounced if a delivery was
5857 forced. I say "may" because I never totally pinned down the problem;
5858 setting up timeout/retry tests is difficult. See also the next item.
5860 79. The ultimate address timeout was not being applied to errors that involved
5861 a combination of host plus message (for example, a timeout on a MAIL
5862 command). When an address resolved to a number of possible hosts, and they
5863 were not all tried for each delivery (e.g. because of hosts_max_try), a
5864 message could remain on the queue longer than the retry timeout.
5866 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5869 81. Fixed an obscure SMTP outgoing bug which required at least the following
5870 conditions: (a) there was another message waiting for the same server;
5871 (b) the server returned 5xx to all RCPT commands in the first message so
5872 that the message was not completed; (c) the server dropped the connection
5873 or gave a negative response to the RSET that Exim sends to abort the
5874 transaction. The observed case was a dropped connection after DATA that had
5875 been sent in pipelining mode. That is, the server had advertised PIPELINING
5876 but was not implementing it correctly. The effect of the bug was incorrect
5877 behaviour, such as trying another host, and this could lead to a crash.
5883 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5884 and daemon.c were passed as pointers to ints; they should have been
5885 pointers to socklen_t variables (which are typically unsigned ints).
5887 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5890 3. Fixed a really odd bug that affected only the testing scheme; patching a
5891 certain fixed string in the binary changed the value of another string that
5892 happened to be identical to the end of the original first string.
5894 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5895 name", it returns that address as the IP address. On some operating
5896 systems (e.g. Solaris), it also passes back the IP address string as the
5897 "host name". However, on others (e.g. Linux), it passes back an empty
5898 string. Exim wasn't checking for this, and was changing the host name to an
5899 empty string, assuming it had been canonicalized.
5901 5. Although rare, it is permitted to have more than one PTR record for a given
5902 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5903 all the names associated with an address, because they do in Solaris.
5904 However, it seems that they do not in Linux for data that comes from the
5905 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5906 I found this out when I moved to a new Linux workstation and tried to run
5907 the Exim test suite.
5909 To get round this problem I have changed the code so that it now does its
5910 own call to the DNS to look up PTR records when searching for a host name.
5911 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5912 addresses that are only in /etc/hosts are still found.
5914 This behaviour is, however, controlled by an option called host_lookup_
5915 order, which defaults to "bydns:byaddr". If people want to use the other
5916 order, or indeed, just use one or the other means of lookup, they can
5917 specify it in this variable.
5919 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5920 some operating systems, this comes back from gethostbyaddr() as an empty
5921 string, and this is what Exim used to test for. However, it seems that in
5922 other systems, "." is yielded. Exim now tests for this case too.
5924 7. The values of check_spool_space and check_log_space are now held internally
5925 as a number of kilobytes instead of an absolute number of bytes. If a
5926 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5927 kilobyte. This means that much larger values can be stored.
5929 8. Exim monitor: an attempt to get the action menu when not actually pointing
5930 at a message produces an empty menu entitled "No message selected". This
5931 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5932 no entries in it ("Shell widget menu has zero width and/or height"). So I
5933 have added a single, blank menu entry in this case.
5935 9. Added ${quote_local_part.
5937 10. MIME decoding is now applied to the contents of Subject: header lines when
5940 11. Now that a reference to $sender_host_address automatically causes a reverse
5941 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5942 host lookup before query-style lookups in lists that might use this
5943 variable. This has therefore been abolished, and the "net-" prefix is no
5944 longer necessary for query-style lookups.
5946 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5947 have been a typo for LFLAGS, so it has been changed.
5949 13. The install script calls Exim with "-C /dev/null" in order to find the
5950 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5951 to be output. However, since Exim outputs its version number before the
5952 error, it didn't break the script. It just looked ugly. I fixed this by
5953 always allowing "-C /dev/null" if the caller is root.
5955 14. Ignore overlarge ACL variable number when reading spool file - insurance
5956 against a later release with more variables having written the file.
5958 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5959 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5960 this, as well as the form without the "IPv6" on the front.
5962 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5963 OS/Makefile-Darwin file.
5965 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5966 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5968 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5969 variable. However, some OS use ints for inodes. I've added cast to long int
5970 to get rid of the compiler warning.
5972 19. I had forgotten to lock out "/../" in configuration file names when
5973 ALT_CONFIG_PREFIX was set.
5975 20. Routers used for verification do not need to specify transports. However,
5976 if such a router generated a host list, and callout was configured, Exim
5977 crashed, because it could not find a port number from the (non-existent)
5978 transport. It now assumes port 25 in this circumstance.
5980 21. Added the -t option to exigrep.
5982 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5983 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5984 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5985 them is set, LOOKUP_LSEARCH is forced.
5987 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5989 24. Added sender and host information to the "rejected by local_scan()" log
5990 line; previously there was no indication of these.
5992 25. Added .include_if_exists.
5994 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5995 Linux. It turns out that not all file systems support this. Apparently some
5996 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5997 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5998 not supported on the file descriptor, is now ignored when Exim is trying to
5999 sync a directory. This applies only to Linux.
6001 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6003 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6004 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6007 29. Added support for maildirsize files from supplied patch (modified a bit).
6009 30. The use of :fail: followed by an empty string could lead Exim to respond to
6010 sender verification failures with (e.g.):
6012 550 Verification failed for <xxx>
6013 550 Sender verify failed
6015 where the first response line was missing the '-' that indicates it is not
6016 the final line of the response.
6018 31. The loop for finding the name of the user that called Exim had a hardwired
6019 limit of 10; it now uses the value of finduser_retries, which is used for
6020 all other user lookups.
6022 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6025 33. Exim was neglecting to zero errno before one call of strtol() when
6026 expanding a string and expecting an integer value. On some systems this
6027 resulted in spurious "integer overflow" errors. Also, it was casting the
6028 result into an int without checking.
6030 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6031 did not work. The code looks as if it has *never* worked, though it appears
6032 to have been documented since at least release 1.62. I have made it work.
6034 35. The "timeout_DNS" error in retry rules, also documented since at least
6035 1.62, also never worked. As it isn't clear exactly what this means, and
6036 clearly it isn't a major issue, I have abolished the feature by treating it
6037 as "timeout", and writing a warning to the main and panic logs.
6039 36. The display of retry rules for -brt wasn't always showing the error code
6042 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6043 timeout_connect_A, timeout_connect_MX.
6045 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6046 to the empty sender.
6048 39. The daemon was not analysing the content of -oX till after it had closed
6049 stderr and disconnected from the controlling terminal. This meant that any
6050 syntax errors were only noted on the panic log, and the return code from
6051 the command was 0. By re-arranging the code a little, I've made the
6052 decoding happen first, so such errors now appear on stderr, and the return
6053 code is 1. However, the actual setting up of the sockets still happens in
6054 the disconnected process, so errors there are still only recorded on the
6057 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6058 connections (as happens on some IP stacks) was logged at start up time as
6059 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6060 it from "IPv6 and IPv4", which means that two separate sockets are being
6063 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6064 says whether AF_INET or AF_INET6 was passed as an argument.
6066 42. Exiwhat output was messed up when time zones were included in log
6069 43. Exiwhat now gives more information about the daemon's listening ports,
6070 and whether -tls-on-connect was used.
6072 44. The "port" option of the smtp transport is now expanded.
6074 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6075 silently ignored. Now an error message is written to the main and panic
6078 46. There's a new ACL modifier called "logwrite" which writes to a log file
6079 as soon as it is encountered.
6081 47. Added $local_user_uid and $local_user_gid at routing time.
6083 48. Exim crashed when trying to verify a sender address that was being
6086 49. Exim was recognizing only a space character after ".include". It now also
6087 recognizes a tab character.
6089 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6090 extracting the relevant information from the specification. The man page no
6091 longer contains scrambled data for the -d option, and I've added a section
6092 at the front about calling Exim under different names.
6094 51. Added "extra_headers" argument to the "mail" command in filter files.
6096 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6099 53. Installed eximstats 1.29.
6101 54. Added transport_filter_timeout as a generic transport option.
6103 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6104 Cc: header lines. This was required by RFC 822, but it not required by RFC
6107 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6108 incoming messages that did not have them. Now it does so only if the
6109 message originates locally, that is, if there is no associated remote host
6110 address. When Resent- header lines are present, this applies to the Resent-
6111 lines rather than the non-Resent- lines.
6113 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6114 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6116 58. Messages for configuration errors now include the name of the main
6117 configuration file - useful now that there may be more than one file in a
6118 list (.included file names were always shown).
6120 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6121 for those rare installations that do not start the daemon as root or run it
6122 setuid root. I've cut out the call to initgroups() if the daemon is not
6125 60. The Exim user and group can now be bound into the binary as text strings
6126 that are looked up at the start of Exim's processing.
6128 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6130 62. Added $mailstore_basename variable.
6132 63. Installed patch to sieve.c from Michael Haardt.
6134 64. When Exim failed to open the panic log after failing to open the main log,
6135 the original message it was trying to log was written to stderr and debug
6136 output, but if they were not available (the usual case in production), it
6137 was lost. Now it is written to syslog before the two lines that record the
6138 failures to open the logs.
6140 65. Users' Exim filters run in subprocesses under the user's uid. It is
6141 possible for a "deliver" command or an alias in a "personal" command to
6142 provoke an address rewrite. If logging of address rewriting is configured,
6143 this fails because the process is not running as root or exim. There may be
6144 a better way of dealing with this, but for the moment (because 4.30 needs
6145 to be released), I have disabled address rewrite logging when running a
6146 filter in a non-root, non-exim process.
6152 1. The buildconfig auxiliary program wasn't quoting the value set for
6153 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6154 not defined. This bug was masked in 4.22 by the effect that was fixed in
6157 2. Some messages that were rejected after a message id was allocated were
6158 shown as "incomplete" by exigrep. It no longer does this for messages that
6159 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6161 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6162 have allow_domain_literals set, the ID did not get logged in the <= line.
6163 Domain literals are now always recognized in Message-ID: header lines.
6165 4. The first argument for a ${extract expansion item is the key name or field
6166 number. Leading and trailing spaces in this item were not being ignored,
6167 causing some misleading effects.
6169 5. When deliver_drop_privilege was set, single queue runner processes started
6170 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6171 same command in the process it spins off) were not dropping privilege.
6173 6. When the daemon running as "exim" started a queue runner, it always
6174 re-executed Exim in the spun-off process. This is a waste of effort when
6175 deliver_drop_privilege is set. The new process now just calls the
6176 queue-runner function directly.
6182 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6185 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6186 ignored. Though the use of -oP was forcing the writing of a pid file, it
6187 was always written to the default place.
6189 3. If the message "no IP address found for host xxxx" is generated during
6190 incoming verification, it is now followed by identification of the incoming
6191 connection (so you can more easily find what provoked it).
6193 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6195 5. Added some features to "harden" Exim a bit more against certain attacks:
6197 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6198 be put in Local/Makefile. This is like the never_users runtime option,
6199 but it cannot be overridden. The default setting is "root".
6201 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6202 prefix string with which any file named in a -C command line option
6205 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6206 is retained for -C and -D only if the caller of Exim is root. Without
6207 it, the exim user may also use -C and -D and retain privilege.
6209 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6210 command line option is disabled.
6212 6. Macro names set by the -D option must start with an upper case letter, just
6213 like macro names defined in the configuration file.
6215 7. Added "dereference=" facility to LDAP.
6217 8. Two instances of the typo "uknown" in the source files are fixed.
6219 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6220 the Configure-Makefile script screwed up while processing it.
6222 10. Incorporated PCRE 4.4.
6224 11. The SMTP synchronization check was not operating right at the start of an
6225 SMTP session. For example, it could not catch a HELO sent before the client
6226 waited for the greeting. There is now a check for outstanding input at the
6227 point when the greeting is written. Because of the duplex, asynchronous
6228 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6229 way, but not yet received, when the check is performed.
6231 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6232 on TCP/IP sockets, because this apparently causes some broken clients to
6235 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6236 unchanged) from the Cygwin maintainer.
6238 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6239 was supported instead of testing for mbx. Effectively a typo.
6241 15. The spa authenticator server code was not checking that the input it
6242 received was valid base64.
6244 16. The debug output line for the "set" modifier in ACLs was not showing the
6245 name of the variable that was being set.
6247 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6249 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6250 lookup on its own. Something else was needed to trigger the lookup. For
6251 example, a match in host_lookup or the need for a host name in a host list.
6252 Now, if $sender_host_name is referenced and the host name has not yet been
6253 looked up, a lookup is performed. If the lookup fails, the variable remains
6254 empty, and $host_lookup_failed is set to "1".
6256 19. Added "eqi" as a case-independent comparison operator.
6258 20. The saslauthd authentication condition could segfault if neither service
6259 nor realm was specified.
6261 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6262 error message that was logged was misleading, and incoming SMTP
6263 connections were dropped. The message is now more accurate, and temporary
6264 errors are given to SMTP connections.
6266 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6267 (except RSET) with a 421 error, until QUIT is received. However, it was
6268 failing to send a response to QUIT.
6270 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6271 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6272 ACL is now run after the helo_try_verify_hosts code.
6274 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6275 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6276 case-independent, so other case variants are also recognized). Apparently
6277 some systems use these upper case variants.
6279 25. If more than two messages were waiting for the same host, and a transport
6280 filter was specified for the transport, Exim sent two messages over the
6281 same TCP/IP connection, and then failed with "socket operation on non-
6282 socket" when it tried to send the third.
6284 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6286 27. The extern definition of crypt16() in expand.c was not being excluded when
6287 the OS had its own crypt16() function.
6289 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6290 as a preferred synonym for return_size_limit, both as an option and as an
6293 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6295 30. Changed the default configuration ACL to relax the local part checking rule
6296 for addresses that are not in any local domains. For these addresses,
6297 slashes and pipe symbols are allowed within local parts, but the sequence
6298 /../ is explicitly forbidden.
6300 31. SPA server authentication was not clearing the challenge buffer before
6303 32. log_message in a "warn" ACL statement was writing to the reject log as
6304 well as to the main log, which contradicts the documentation and doesn't
6305 seem right (because no rejection is happening). So I have stopped it.
6307 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6308 However, I am unable to do any testing of this.
6310 34. Fixed an infelicity in the appendfile transport. When checking directories
6311 for a mailbox, to see if any needed to be created, it was accidentally
6312 using path names with one or more superfluous leading slashes; tracing
6313 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6315 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6316 contents are added to the log line that is written for every discarded
6317 recipient. (Previously a log_message setting was ignored.)
6319 36. The ${quote: operator now quotes the string if it is empty.
6321 37. The install script runs exim in order to find its version number. If for
6322 some reason other than non-existence or emptiness, which it checks, it
6323 could not run './exim', it was installing it with an empty version number,
6324 i.e. as "exim-". This error state is now caught, and the installation is
6327 38. An argument was missing from the function that creates an error message
6328 when Exim fails to connect to the socket for saslauthd authentication.
6329 This could cause Exim to crash, or give a corrupted message.
6331 39. Added isip, isip4, and isip6 to ${if conditions.
6333 40. The ACL variables $acl_xx are now saved with the message, and can be
6334 accessed later in routers, transports, and filters.
6336 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6337 strings in the file are not string-expanded.
6339 42. If a MAIL command specified a SIZE value that was too large to fit into an
6340 int variable, the check against message_size_limit failed. Such values are
6341 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6342 day this will have to be increased, but I don't think I want to be around
6343 when emails are that large.
6350 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6351 iconv() is not standard in FreeBSD.
6353 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6354 IPv6 enabled. The observed symptom was a segmentation fault on return from
6355 the function os_common_find_running_interfaces() in src/os.c.
6357 3. In the check_special_case() function in daemon.c I had used "errno" as an
6358 argument name, which causes warnings on some systems. This was basically a
6359 typo, since it was named "eno" in the comments!
6361 4. The code that waits for the clock to tick (at a resolution of some fraction
6362 of a second) so as to ensure message-id uniqueness was always waiting for
6363 at least one whole tick, when it could have waited for less. [This is
6364 almost certainly not relevant at current processor speeds, where it is
6365 unlikely to ever wait at all. But we try to future-proof.]
6367 5. The function that sleeps for a time interval that includes fractions of a
6368 second contained a race. It did not block SIGALRM between setting the
6369 timer, and suspending (a couple of lines later). If the interval was short
6370 and the sigsuspend() was delayed until after it had expired, the suspension
6371 never ended. On busy systems this could lead to processes getting stuck for
6374 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6375 process, before it forks any delivery processes. The open lookup caching
6376 mechanism meant that the open file or database connection was passed into
6377 the delivery process. The problem was that delivery processes always tidy
6378 up cached lookup data. This could cause a problem for the next delivery
6379 process started by the queue runner, because the external queue runner
6380 process does not know about the closure. So the next delivery process
6381 still has data in the lookup cache. In the case of a file lookup, there was
6382 no problem because closing a file descriptor in a subprocess doesn't affect
6383 the parent. However, if the lookup was caching a connection to a database,
6384 the connection was closed, and the second delivery process was likely to
6385 see errors such as "PGSQL: query failed: server closed the connection
6386 unexpectedly". The problem has been fixed by closing all cached lookups
6387 in a queue runner before running a delivery process.
6389 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6390 seem to have the "const" qualifier which it has on other OS. I've
6393 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6394 *of the same type* (client or server) with the same public name that an
6395 error should be diagnosed.
6397 9. When Exim looked up a host name for an IP address, but failed to find the
6398 original IP address when looking up the host name (a safety check), it
6399 output the message "<ip address> does not match any IP for NULL", which was
6400 confusing, to say the least. The bug was that the host name should have
6401 appeared instead of "NULL".
6403 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6404 user that is built into the binary, and the -C or -D options is used, root
6405 privilege is dropped before the configuration file is read. In addition,
6406 logging is switched to stderr instead of the normal log files. If the
6407 configuration then re-defines the Exim user, the unprivileged environment
6408 is probably not what is expected, so Exim logs a panic warning message (but
6411 However, if deliver_drop_privilege is set, the unprivileged state may well
6412 be exactly what is intended, so the warning has been cut out in that case,
6413 and Exim is allowed to try to write to its normal log files.
6419 1. smtp_return_error_details was not giving details for temporary sender
6420 or receiver verification errors.
6422 2. Diagnose a configuration error if two authenticators have the same public
6425 3. Exim used not to create the message log file for a message until the first
6426 delivery attempt. This could be confusing when incoming messages were held
6427 for policy or load reasons. The message log file is now created at the time
6428 the message is received, and an initial "Received" line is written to it.
6430 4. The automatically generated man page for command line options had a minor
6431 bug that caused no ill effects; however, a more serious problem was that
6432 the procedure for building the man page automatically didn't always
6433 operate. Consequently, release 4.20 contains an out-of-date version. This
6434 shouldn't happen again.
6436 5. When building Exim with embedded Perl support, the script that builds the
6437 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6438 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6440 6. The freeze_tell option was not being used for messages that were frozen on
6441 arrival, either by an ACL or by local_scan().
6443 7. Added the smtp_incomplete_transaction log selector.
6445 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6446 was accepting AUTH without a new EHLO.
6448 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6449 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6452 10. Logging of TCP/IP connections (when configured) now happens in the main
6453 daemon process instead of the child process, so that the TCP/IP connection
6454 count is more accurate (but it can never be perfect).
6456 11. The use of "drop" in a nested ACL was not being handled correctly in the
6457 outer ACL. Now, if condition failure induced by the nested "drop" causes
6458 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6459 or "require"), the connection is dropped.
6461 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6462 that yield "discard" can now be used with an "accept" or a "discard" verb,
6463 but an error is generated for any others (because I can't see a useful way
6464 to define what should happen).
6466 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6467 are now processed in the same way as lines in the Exim configuration file.
6468 In particular, continuation lines are supported.
6470 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6472 15. Added -ti meaning -t -i.
6474 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6475 domains, and warn by logging if others are found.
6477 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6478 returned from GIFCONF when Exim is trying to find the list of interfaces on
6479 a host. The code in os.c has been modified to copy each ifreq to an aligned
6480 structure in all cases.
6482 Also, in some cases, the returned ifreq's were being copied to a 'struct
6483 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6484 means the last couple of bytes of an IPv6 address could be chopped if the
6485 ifreq contained only a normal sockaddr (14 bytes storage).
6487 18. Named domain lists were not supported in the hosts_treat_as_local option.
6488 An entry such as +xxxx was not recognized, and was treated as a literal
6491 19. Ensure that header lines added by a DATA ACL are included in the reject log
6492 if the ACL subsequently rejects the message.
6494 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6495 MD5 (which is deprecated).
6497 21. When testing a filter file using -bf, Exim was writing a message when it
6498 took the sender from a "From " line in the message, but it was not doing so
6499 when it took $return_path from a Return-Path: header line. It now does.
6501 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6502 with a valid header line field name (a series of printing characters
6503 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6505 23. Changed "disc" in the source to "disk" to conform to the documentation and
6506 the book and for uniformity.
6508 24. Ignore Sendmail's -Ooption=value command line item.
6510 25. When execve() failed while trying to run a command in a pipe transport,
6511 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6512 could be confused with a return value of 69 from the command itself. This
6513 has been changed to 127, the value the shell returns if it is asked to run
6514 a non-existent command. The wording for the related log line suggests a
6515 non-existent command as the problem.
6517 26. If received_header_text expands to an empty string, do not add a Received:
6518 header line to the message. (Well, it adds a token one on the spool, but
6519 marks it "old" so that it doesn't get used or transmitted.)
6521 27. Installed eximstats 1.28 (addition of -nt option).
6523 28. There was no check for failure on the call to getsockname() in the daemon
6524 code. This can fail if there is a shortage of resources on the system, with
6525 ENOMEM, for example. A temporary error is now given on failure.
6527 29. Contrary to the C standard, it seems that in some environments, the
6528 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6529 program. Exim now does this explicitly; it affects the formatting of
6530 timestamps using strftime().
6532 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6533 complaints. I've now initialized all the variables, to avoid this.
6535 32. Header lines added by a system filter were not being "seen" during
6536 transport-time rewrites.
6538 33. The info_callback() function passed to OpenSSL is set up with type void
6539 (*)(SSL *, int, int), as described somewhere. However, when calling the
6540 function (actually a macro) that sets it up, the type void(*)() is
6541 expected. I've put in a cast to prevent warnings from picky compilers.
6543 34. If a DNS black list lookup found a CNAME record, but there were no A
6544 records associated with the domain it pointed at, Exim crashed.
6546 35. If a DNS black list lookup returned more than one A record, Exim ignored
6547 all but the first. It now scans all returned addresses if a particular IP
6548 value is being sought. In this situation, the contents of the
6549 $dnslist_value variable are a list of all the addresses, separated by a
6552 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6553 to accept a host name and all its aliases if the forward lookup for any of
6554 them yielded the IP address of the incoming connection. Now it accepts only
6555 those names whose forward lookup yields the correct IP address. Any other
6556 names are discarded. This closes a loophole whereby a rogue DNS
6557 administrator could create reverse DNS records to break through a
6558 wildcarded host restriction in an ACL.
6560 37. If a user filter or a system filter that ran in a subprocess used any of
6561 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6562 the wrong values were passed to the pipe command ($thisaddress had the
6563 value of $0, $0 had the value of $1, etc). This bug was introduced by
6564 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6566 38. Improved the line breaking for long SMTP error messages from ACLs.
6567 Previously, if there was no break point between 40 and 75 characters, Exim
6568 left the rest of the message alone. Two changes have been made: (a) I've
6569 reduced the minimum length to 35 characters; (b) if it can't find a break
6570 point between 35 and 75 characters, it looks ahead and uses the first one
6571 that it finds. This may give the occasional overlong line, but at least the
6572 remaining text gets split now.
6574 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6575 file descriptors might be low, and that setting 1000 would always raise it.
6576 It turns out that in some environments, the limit is already over 1000 and
6577 that lowering it causes trouble. So now Exim takes care not to decrease it.
6579 40. When delivering a message, the value of $return_path is set to $sender_
6580 address at the start of routing (routers may change the value). By an
6581 oversight, this default was not being set up when an address was tested by
6582 -bt or -bv, which affected the outcome if any router or filter referred to
6585 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6586 log only when "message" or "log_message" are set. However, if one of the
6587 conditions was an address verification, or a call to a nested ACL, the
6588 messages generated by the underlying test were being passed through. This
6589 no longer happens. The underlying message is available in $acl_verify_
6590 message for both "message" and "log_message" expansions, so it can be
6591 passed through if needed.
6593 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6594 new expansion $bh_ to give the encoded byte string without charset
6595 translation. Translation happens only if iconv() is available; HAVE_ICONV
6596 indicates this at build time. HEADERS_CHARSET gives the charset to
6597 translate to; headers_charset can change it in the configuration, and
6598 "headers charset" can change it in an individual filter file.
6600 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6601 that creates RFC 2047 encoded "words" labels them as that charset instead
6602 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6603 expansion operator; (ii) when Exim creates a From: line for a local
6604 message; (iii) when a header line is rewritten to include a "phrase" part.
6606 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6607 buggy, causing it to skip the first lines of messages whose message ID
6608 ended in 'D'. This would not have bitten before Exim release 4.14, because
6609 message IDs were unlikely to end in 'D' before then. The effect was to have
6610 incorrect size information for certain domains.
6612 45. #include "config.h" was missing at the start of the crypt16.c module. This
6613 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6616 46. If there was a timeout during a "random" callout check, Exim treated it as
6617 a failure of the random address, and carried on sending RSET and the real
6618 address. If the delay was just some slowness somewhere, the response to the
6619 original RCPT would be taken as a response to RSET and so on, causing
6620 mayhem of various kinds.
6622 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6623 when I implemented it. It didn't allow for the fact that some option values
6624 may legitimately be negative (e.g. size_addition), and it didn't even do
6625 the right test for positive values.
6627 48. Domain names in DNS records are case-independent. Exim always looks them up
6628 in lower case. Some resolvers return domain names in exactly the case they
6629 appear in the zone file, that is, they may contain uppercase letters. Not
6630 all resolvers do this - some return always lower case. Exim was treating a
6631 change of case by a resolver as a change of domain, similar to a widening
6632 of a domain abbreviation. This triggered its re-routing code and so it was
6633 trying to route what was effectively the same domain again. This normally
6634 caused routing to fail (because the router wouldn't handle the domain
6635 twice). Now Exim checks for this case specially, and just changes the
6636 casing of the domain that it ultimately uses when it transmits the message
6639 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6642 50. If a filter generated a file delivery with a non-absolute name (possible if
6643 no home directory exists for the router), the forbid_file option was not
6646 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6647 the existing equality matching.
6649 52. Exim was using ints instead of ino_t variables in some places where it was
6650 dealing with inode numbers.
6652 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6653 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6654 called TMPDIR, and if it finds it is different, it changes its value.
6656 54. The smtp_printf() function is now made available to local_scan() so
6657 additional output lines can be written before returning. There is also an
6658 smtp_fflush() function to enable the detection of a dropped connection.
6659 The variables smtp_input and smtp_batched_input are exported to
6662 55. Changed the default runtime configuration: the message "Unknown user"
6663 has been removed from the ACL, and instead placed on the localuser router,
6664 using the cannot_route_message feature. This means that any verification
6665 failures that generate their own messages won't get overridden. Similarly,
6666 the "Unrouteable address" message that was in the ACL for unverifiable
6667 relay addresses has also been removed.
6669 56. Added hosts_avoid_esmtp to the smtp transport.
6671 57. The exicyclog script was not checking for the esoteric option
6672 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6673 will work only if exicyclog is run under the appropriate euid.
6675 58. Following a discussion on the list, the rules by which Exim recognises line
6676 endings on incoming messages have been changed. The -dropcr and drop_cr
6677 options are now no-ops, retained only for backwards compatibility. The
6678 following line terminators are recognized: LF CRLF CR. However, special
6679 processing applies to CR:
6681 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6682 nor a local message in the state where . is a terminator.
6684 (ii) If a bare CR is encountered in a header line, an extra space is added
6685 after the line terminator so as not to end the header. The reasoning
6686 behind this is that bare CRs in header lines are most likely either
6687 to be mistakes, or people trying to play silly games.
6689 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6690 was being incorrectly given as 18 bytes larger than it should have been.
6691 This is a VOB (very old bug).
6693 60. This may never have affected anything current, but just in case it has:
6694 When the local host is found other than at the start of a list of hosts,
6695 the local host, those with the same MX, and any that follow, are discarded.
6696 When the list in question was part of a longer list of hosts, the following
6697 hosts (not currently being processed) were also being discarded. This no
6698 longer happens. I'm not sure if this situation could ever has previously
6701 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6704 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6705 header. This is something that is recommended in a new Internet Draft, and
6706 is something that is documented as being done by Sendmail. There are two
6707 possible values. For messages generated by the autoreply transport, Exim
6710 Auto-Submitted: auto-replied
6712 whereas for all other generated messages (e.g. bounces) it adds
6714 Auto-Submitted: auto-generated
6716 63. The "personal" condition in filters now includes a test for the
6717 Auto-Submitted: header. If it contains the string "auto-" the message it
6718 not considered personal.
6720 64. Added rcpt_include_affixes as a generic transport option.
6722 65. Added queue_only_override (default true).
6724 66. Added the syslog_duplication option.
6726 67. If what should have been the first header line of a message consisted of
6727 a space followed by a colon, Exim was mis-interpreting it as a header line.
6728 It isn't of course - it is syntactically invalid and should therefore be
6729 treated as the start of the message body. The misbehaviour could have
6730 caused a number of strange effects, including loss of data in subsequent
6731 header lines, and spool format errors.
6733 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6734 client host had authenticated. This control can now be exercised by an ACL
6735 for more flexibility.
6737 69. By default, callouts do not happen when testing with -bh. There is now a
6738 variant, -bhc, which does actually run the callout code, including
6739 consulting and updating the callout cache.
6741 70. Added support for saslauthd authentication, courtesy of Alexander
6744 71. If statvfs() failed on the spool or log directories while checking their
6745 size for availability, Exim confusingly gave the error "space shortage".
6746 Furthermore, in debugging mode it crashed with a floating point exception.
6747 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6748 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6749 serious problem, Exim now writes to the main and panic logs when this
6750 happens, with details of the failure. It then refuses to accept the
6751 incoming message, giving the message "spool directory problem" or "log
6752 directory problem" with a 421 code for SMTP messages.
6754 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6755 0, 1, and 2 exist, because some OS complain for execs without them (see
6756 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6757 descriptors. However, the code omitted to check that the open succeeded,
6758 causing mysterious errors if for some reason the permissions on /dev/null
6759 got screwed. Now Exim writes a message to the main and panic logs, and
6760 bombs out if it can't open /dev/null.
6762 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6763 interact so that it is all more flexible. It is supposed to remain
6764 backwards compatible. Also added extra_local_interfaces.
6766 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6767 to bomb out with an assertion failure - to the client this appears as a
6768 connection drop. This problem occurs in the part of the code that was taken
6769 from the Samba project. Fortunately, the assertion is in a very simple
6770 function, so I have fixed this by reproducing the function inline in the
6771 one place where it is called, and arranging for authentication to fail
6772 instead of killing the process with assert().
6774 75. The SPA client code was not working when the server requested OEM rather
6775 than Unicode encoding.
6777 76. Added code to make require_files with a specific uid setting more usable in
6778 the case where statting the file as root fails - usually a non-root-mounted
6779 NFS file system. When this happens and the failure is EACCES, Exim now
6780 forks a subprocess and does the per-uid checking as the relevant uid.
6782 77. Added process_log_path.
6784 78. If log_file_path was not explicitly set, a setting of check_log_space or
6785 check_log_inodes was ignored.
6787 79. If a space check for the spool or log partitions fails, the incident is now
6788 logged. Of course, in the latter case the data may get lost...
6790 80. Added the %p formatting code to string_format() so that it can be used to
6791 print addresses in debug_print(). Adjusted all the address printing in the
6792 debugging in store.c to use %p rather than %d.
6794 81. There was a concern that a line of code in smtp_in.c could overflow a
6795 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6796 initially expressed, the concern was not well-founded, because trailing
6797 spaces are removed early. However, if the trailing spaces were followed by
6798 a NULL, they did not get removed, so the overflow was possible. Two fixes
6801 (a) I re-wrote the offending code in a cleaner fashion.
6802 (b) If an incoming SMTP command contains a NULL character, it is rejected
6805 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6806 runs initgroups(), so that if the Exim user is in any additional groups,
6807 they will be used during message reception.
6813 The change log for 4.20 and earlier releases has been archived.