1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Rework error string handling in TLS interface so that the caller in
12 more cases is responsible for logging. This permits library-sourced
13 string to be attached to addresses during delivery, and collapses
14 pairs of long lines into single ones.
16 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
17 during configuration. Wildcards are allowed and expanded.
23 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
24 than -2003 did; needs libidn2 in addition to libidn.
26 JH/02 The path option on a pipe transport is now expanded before use.
28 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
29 Patch provided by "Björn", documentation fix added too.
31 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
32 missing a wire-to-host endian conversion.
34 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
35 close after a BDAT command line could be taken as a following command,
36 giving a synch failure. Fix by only checking for synch immediately
37 before acknowledging the chunk.
39 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
40 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
41 macro. Patches provided by Josh Soref.
43 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
44 Previously we did not; the RFC seems ambiguous and VRFY is not listed
45 by IANA as a service extension. However, John Klensin suggests that we
48 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
49 the dkim code may be unix-mode line endings rather than smtp wire-format
50 CRLF, so prepend a CR to any bare LF.
52 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
53 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
55 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
56 the first were themselves being wrongly included in the feed into dkim
57 processing; with most chunk sizes in use this resulted in an incorrect
58 body hash calculated value.
60 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
61 DKIM signature block, for verification. Although advised against by
62 standards it is specifically not ruled illegal.
64 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
66 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
67 missing a body hash (the bh= tag).
69 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
70 It seems that HAProxy sends the Proxy Protocol information in clear and
71 only then does a TLS startup, so do the same.
73 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
74 TCP connections (such as for Spamd) unless the daemon successfully set
75 Fast Open mode on its listening sockets. This fixes breakage seen on
76 too-old kernels or those not configured for Fast Open, at the cost of
77 requiring both directions being enabled for TFO, and TFO never being used
78 by non-daemon-related Exim processes.
80 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
81 endings, at least on the first header line. Try to canonify any that get
82 past that check, despite the cost.
84 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
85 now limited to an arbitrary five deep, while parsing addresses with the
86 strip_excess_angle_brackets option enabled.
88 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
89 instead leave the unprompted TLS handshake in socket buffer for the
90 TLS library to consume.
92 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
94 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
96 JH/16 Drop variables when they go out of scope. Memory management drops a whole
97 region in one operation, for speed, and this leaves assigned pointers
98 dangling. Add checks run only under the testsuite which checks all
99 variables at a store-reset and panics on a dangling pointer; add code
100 explicitly nulling out all the variables discovered. Fixes one known
101 bug: a transport crash, where a dangling pointer for $sending_ip_address
102 originally assigned in a verify callout, is re-used.
104 PP/06 Drop '.' from @INC in various Perl scripts.
106 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
108 PP/08 Reduce a number of compilation warnings under clang; building with
109 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
110 should be warning-free.
112 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
114 HS/01 Fix portability problems introduced by PP/08 for platforms where
115 realloc(NULL) is not equivalent to malloc() [SunOS et al].
121 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
122 supports it and a size is available (ie. the sending peer gave us one).
124 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
125 years of being deprecated). The replacements are the ACLs
126 acl_smtp_mime and acl_not_smtp_mime.
128 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
129 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
130 or even an in-clear connection were permitted. Now, if the host lookup
131 was dnssec and dane was requested then the host is only used if the
132 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
133 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
134 if one fails this test.
135 This means that a poorly-configured remote DNS will make it incommunicado;
136 but it protects against a DNS-interception attack on it.
138 JH/04 Bug 1810: make continued-use of an open smtp transport connection
139 non-noisy when a race steals the message being considered.
141 JH/05 If main configuration option tls_certificate is unset, generate a
142 self-signed certificate for inbound TLS connections.
144 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
145 in rewrites and routers.
147 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
148 and logged a warning sing 4.83; now they are a configuration file error.
150 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
151 (lacking @domain). Apply the same qualification processing as RCPT.
153 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
155 JH/10 Support ${sha256:} applied to a string (as well as the previous
158 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
159 a cutthrough deliver is pending, as we always want to make a connection.
160 This also avoids re-routing the message when later placing the cutthrough
161 connection after a verify cache hit.
162 Do not update it with the verify result either.
164 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
165 when routing results in more than one destination address.
167 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
168 signing (which inhibits the cutthrough capability). Previously only
169 the presence of an option was tested; now an expansion evaluating as
170 empty is permissible (obviously it should depend only on data available
171 when the cutthrough connection is made).
173 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
174 the relevant preceding SMTP command did not note the pipelining mode.
176 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
177 Previously they were not counted.
179 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
180 as one having no matching records. Previously we deferred the message
181 that needed the lookup.
183 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
184 distinguished as "(=".
186 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
187 for missing MX records. Previously it only worked for missing A records.
189 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
191 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
192 after the data-go-ahead and data-ack. Patch from Jason Betts.
194 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
195 even for a "none" policy. Patch from Tony Meyer.
197 JH/22 Fix continued use of a connection for further deliveries. If a port was
198 specified by a router, it must also match for the delivery to be
201 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
202 When one of the recipients of a message was unsuitable for the connection
203 (has no matching addresses), we lost track of needing to mark it
204 deferred. As a result mail would be lost.
206 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
208 JH/25 Decoding ACL controls is now done using a binary search; the source code
209 takes up less space and should be simpler to maintain. Merge the ACL
210 condition decode tables also, with similar effect.
212 JH/26 Fix problem with one_time used on a redirect router which returned the
213 parent address unchanged. A retry would see the parent address marked as
214 delivered, so not attempt the (identical) child. As a result mail would
217 JH/27 Fix a possible security hole, wherein a process operating with the Exim
218 UID can gain a root shell. Credit to http://www.halfdog.net/ for
219 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
222 JH/28 Enable {spool,log} filesystem space and inode checks as default.
223 Main config options check_{log,spool}_{inodes,space} are now
224 100 inodes, 10MB unless set otherwise in the configuration.
226 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
227 Previously it only applied to the main-section connection policy
230 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
232 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
233 by me. Added RFC7919 DH primes as an alternative.
235 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
236 are not in the system include path.
238 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
239 GnuTLS, when a session startup failed (eg because the client disconnected)
240 Exim did stdio operations after fclose. This was exposed by a recent
241 change which nulled out the file handle after the fclose.
243 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
244 signed directly by the cert-signing cert, rather than an intermediate
245 OCSP-signing cert. This is the model used by LetsEncrypt.
247 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
249 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
250 an incoming connection.
252 HS/02 Bug 1802: Do not half-close the connection after sending a request
255 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
256 fallback to "prime256v1".
258 JH/34 SECURITY: Use proper copy of DATA command in error message.
259 Could leak key material. Remotely exploitable. CVE-2016-9963.
265 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
266 and 3.4.4 - once the server is enabled to respond to an OCSP request
267 it does even when not requested, resulting in a stapling non-aware
268 client dropping the TLS connection.
270 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
271 support variable-length bit vectors. No functional change.
273 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
274 The I= interface field on outgoing lines is now after the H= remote
275 host field, same as incoming lines. There is a separate
276 outgoing_interface log selector which allows you to disable the
279 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
280 If not running log_selector +smtp_connection the mainlog would be held
281 open indefinitely after a "too many connections" event, including to a
282 deleted file after a log rotate. Leave the per net connection logging
283 leaving it open for efficiency as that will be quickly detected by the
284 check on the next write.
286 HS/01 Bug 1671: Fix post transport crash.
287 Processing the wait-<transport> messages could crash the delivery
288 process if the message IDs didn't exist for some reason. When
289 using 'split_spool_directory=yes' the construction of the spool
290 file name failed already, exposing the same netto behaviour.
292 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
293 mime_regex ACL conditions.
295 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
296 to DSN fail messages (bounces): remote IP, remote greeting, remote response
297 to HELO, local diagnostic string.
299 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
300 log line to debug. Even when configured with a tls authenticator many
301 client connections are expected to not authenticate in this way, so
302 an authenticate fail is not an error.
304 HS/02 Add the Exim version string to the process info. This way exiwhat
305 gives some more detail about the running daemon.
307 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
308 matter for fast-change records such as DNSBLs.
310 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
311 retry record, even if constant. There may be multiple transports with
312 different interface settings and the retry behaviour needs to be kept
315 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
317 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
319 JH/10 Bug 840: fix log_defer_output option of pipe transport
321 JH/11 Bug 830: use same host for all RCPTS of a message, even under
322 hosts_randomize. This matters a lot when combined with mua_wrapper.
324 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
325 ${quote_pgsql:<string>} operator.
327 JH/13 Bug 1708: avoid misaligned access in cached lookup.
329 JH/14 Change header file name for freeradius-client. Relevant if compiling
330 with Radius support; from the Gentoo tree and checked under Fedora.
332 JH/15 Bug 1712: Introduce $prdr_requested flag variable
334 JH/16 Bug 1714: Permit an empty string as expansion result for transport
335 option transport_filter, meaning no filtering.
337 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
339 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
340 defaults to "*" (all hosts). The variable is now available when not built
341 with TLS, default unset, mainly to enable keeping the testsuite sane.
342 If a server certificate is not supplied (via tls_certificate) an error is
343 logged, and clients will find TLS connections fail on startup. Presumably
344 they will retry in-clear.
345 Packagers of Exim are strongly encouraged to create a server certificate
346 at installation time.
348 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
349 with the $config_file variable.
351 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
352 in transport context, after the attempt, and per-recipient. The latter type
353 is per host attempted. The event data is the error message, and the errno
354 information encodes the lookup type (A vs. MX) used for the (first) host,
355 and the trailing two digits of the smtp 4xx response.
357 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
358 to write to mainlog (or rejectlog, paniclog) in the window between file
359 creation and permissions/ownership being changed. Particularly affects
360 installations where exicyclog is run as root, rather than exim user;
361 result is that the running daemon panics and dies.
363 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
365 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
366 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
367 "pri" and "weight". Note that the previous implicit priority given by the
368 list order is no longer honoured.
370 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
373 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
374 by defining SUPPORT_SOCKS.
376 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
377 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
378 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
379 variables are renamed to proxy_{local,external}_{address,port}.
381 JH/27 Move Internationalisation support from Experimental to mainline, enabled
382 for a build by defining SUPPORT_I18N
384 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
385 of the query string, and make ${quote_redis:} do that quoting.
387 JH/29 Move Events support from Experimental to mainline, enabled by default
388 and removable for a build by defining DISABLE_EVENT.
390 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
392 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
393 cached by the daemon.
395 JH/32 Move Redis support from Experimental to mainline, enabled for a build
396 by defining LOOKUP_REDIS. The libhiredis library is required.
398 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
399 keys are given for lookup.
401 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
402 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
403 only supported when built with TLS support. The PolarSSL SHA routines
404 are still used when the TLS library is too old for convenient support.
406 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
407 openssl_options), for security. OpenSSL forces this from version 1.1.0
408 server-side so match that on older versions.
410 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
411 allocation for $value could be released as the expansion processing
412 concluded, but leaving the global pointer active for it.
414 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
415 and to use the domains and local_parts ACL conditions.
417 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
418 incorrectly not doubled on cutthrough transmission, hence seen as a
419 body-termination at the receiving system - resulting in truncated mails.
420 Commonly the sender saw a TCP-level error, and retransmitted the message
421 via the normal store-and-forward channel. This could result in duplicates
422 received - but deduplicating mailstores were liable to retain only the
423 initial truncated version.
425 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
427 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
429 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
430 we're in there, support oversigning also; bug 1309.
432 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
434 HS/04 Add support for keep_environment and add_environment options.
436 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
437 either intentional arithmetic overflow during PRNG, or testing config-
440 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
441 delivery resulted in actual delivery. Cancel cutthrough before DATA
444 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
445 rejects a recipient: pass the reject to the originator.
447 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
448 Many were false-positives and ignorable, but it's worth fixing the
451 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
452 for the new environment-manipulation done at startup. Move the routines
453 from being local to tls.c to being global via the os.c file.
455 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
456 an extract embedded as result-arg for a map, the first arg for extract
457 is unavailable so we cannot tell if this is a numbered or keyed
458 extraction. Accept either.
464 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
467 JH/02 The smtp transport option "multi_domain" is now expanded.
469 JH/03 The smtp transport now requests PRDR by default, if the server offers
472 JH/04 Certificate name checking on server certificates, when exim is a client,
473 is now done by default. The transport option tls_verify_cert_hostnames
474 can be used to disable this per-host. The build option
475 EXPERIMENTAL_CERTNAMES is withdrawn.
477 JH/05 The value of the tls_verify_certificates smtp transport and main options
478 default to the word "system" to access the system default CA bundle.
479 For GnuTLS, only version 3.0.20 or later.
481 JH/06 Verification of the server certificate for a TLS connection is now tried
482 (but not required) by default. The verification status is now logged by
483 default, for both outbound TLS and client-certificate supplying inbound
486 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
489 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
490 Status Notification (bounce) messages are now MIME format per RFC 3464.
491 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
492 under the control of the dsn_advertise_hosts option, and routers may
493 have a dsn_lasthop option.
495 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
496 default, modifiable by a malware= option. The list separator for
497 the options can now be changed in the usual way. Bug 68.
499 JH/10 The smtp_receive_timeout main option is now expanded before use.
501 JH/11 The incoming_interface log option now also enables logging of the
502 local interface on delivery outgoing connections.
504 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
505 if the interface and destination host and port all match.
507 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
510 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
511 Patch from Andrew Lewis.
513 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
514 now supports optional time-restrictions, weighting, and priority
515 modifiers per server. Patch originally by <rommer@active.by>.
517 JH/16 The spamd_address main option now supports a mixed list of local
518 and remote servers. Remote servers can be IPv6 addresses, and
519 specify a port-range.
521 JH/17 Bug 68: The spamd_address main option now supports an optional
522 timeout value per server.
524 JH/18 Bug 1581: Router and transport options headers_add/remove can
525 now have the list separator specified.
527 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
530 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
533 JH/21 Support for the A6 type of dns record is withdrawn.
535 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
536 rather than the verbs used.
538 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
539 from 255 to 1024 chars.
541 JH/24 Verification callouts now attempt to use TLS by default.
543 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
544 are generic router options now. The defaults didn't change.
546 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
547 Original patch from Alexander Shikoff, worked over by JH.
549 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
550 files if ZCAT_COMMAND is not executable.
552 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
554 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
556 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
557 Normally benign, it bites when the pair was led to by a CNAME;
558 modern usage is to not canonicalize the domain to a CNAME target
559 (and we were inconsistent anyway for A-only vs AAAA+A).
561 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
563 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
564 when evaluating $sender_host_dnssec.
566 JH/31 Check the HELO verification lookup for DNSSEC, adding new
567 $sender_helo_dnssec variable.
569 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
571 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
573 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
575 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
576 documented as working, but never had. Support all but $spam_report.
578 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
579 added for tls authenticator.
581 HS/03 Add perl_taintmode main config option
587 TL/01 When running the test suite, the README says that variables such as
588 no_msglog_check are global and can be placed anywhere in a specific
589 test's script, however it was observed that placement needed to be near
590 the beginning for it to behave that way. Changed the runtest perl
591 script to read through the entire script once to detect and set these
592 variables, reset to the beginning of the script, and then run through
593 the script parsing/test process like normal.
595 TL/02 The BSD's have an arc4random API. One of the functions to induce
596 adding randomness was arc4random_stir(), but it has been removed in
597 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
598 function when detected.
600 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
601 cause callback expansion.
603 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
604 syntax errors in an expansion can be treated as a string instead of
605 logging or causing an error, due to the internal use of bool_lax
606 instead of bool when processing it.
608 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
609 server certificates when making smtp deliveries.
611 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
613 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
615 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
617 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
618 Merged patch from Sebastian Wiedenroth.
620 JH/05 Fix results-pipe from transport process. Several recipients, combined
621 with certificate use, exposed issues where response data items split
622 over buffer boundaries were not parsed properly. This eventually
623 resulted in duplicates being sent. This issue only became common enough
624 to notice due to the introduction of connection certificate information,
625 the item size being so much larger. Found and fixed by Wolfgang Breyha.
627 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
628 size buffer was used, resulting in syntax errors when an expansion
631 JH/07 Add support for directories of certificates when compiled with a GnuTLS
632 version 3.3.6 or later.
634 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
635 is EXPERIMENTAL_EVENT, the main-configuration and transport options
636 both become "event_action", the variables become $event_name, $event_data
637 and $event_defer_errno. There is a new variable $verify_mode, usable in
638 routers, transports and related events. The tls:cert event is now also
639 raised for inbound connections, if the main configuration event_action
642 TL/06 In test suite, disable OCSP for old versions of openssl which contained
643 early OCSP support, but no stapling (appears to be less than 1.0.0).
645 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
646 server certificate names available under the smtp transport option
647 "tls_verify_cert_hostname" now do not permit multi-component wildcard
650 JH/10 Time-related extraction expansions from certificates now use the main
651 option "timezone" setting for output formatting, and are consistent
652 between OpenSSL and GnuTLS compilations. Bug 1541.
654 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
655 encoded parameter in the incoming message. Bug 1558.
657 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
658 include certificate info, eximon was claiming there were spoolfile
661 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
663 JH/14 Log delivery-related information more consistently, using the sequence
664 "H=<name> [<ip>]" wherever possible.
666 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
667 are problematic for Debian distribution, omit them from the release
670 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
672 JH/16 Fix string representation of time values on 64bit time_t architectures.
675 JH/17 Fix a null-indirection in certextract expansions when a nondefault
676 output list separator was used.
681 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
682 checkers that were complaining about end of non-void function with no
685 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
686 This was a regression introduced in 4.83 by another bugfix.
688 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
690 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
691 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
697 TF/01 Correctly close the server side of TLS when forking for delivery.
699 When a message was received over SMTP with TLS, Exim failed to clear up
700 the incoming connection properly after forking off the child process to
701 deliver the message. In some situations the subsequent outgoing
702 delivery connection happened to have the same fd number as the incoming
703 connection previously had. Exim would try to use TLS and fail, logging
704 a "Bad file descriptor" error.
706 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
707 utilities have not been installed.
709 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
710 temporary space as the ACL may create new global variables.
712 TL/01 LDAP support uses per connection or global context settings, depending
713 upon the detected version of the libraries at build time.
715 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
716 to extract and use the src ip:port in logging and expansions as if it
717 were a direct connection from the outside internet. PPv2 support was
718 updated based on HAProxy spec change in May 2014.
720 JH/02 Add ${listextract {number}{list}{success}{fail}}.
722 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
723 Properly escape header and check for NULL return.
725 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
728 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
730 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
731 characters in header names, implemented as a verify condition.
732 Contributed by Michael Fischer v. Mollard.
734 TL/05 Rename SPF condition results err_perm and err_temp to standardized
735 results permerror and temperror. Previous values are deprecated but
736 still accepted. In a future release, err_perm and err_temp will be
737 completely removed, which will be a backward incompatibility if the
738 ACL tests for either of these two old results. Patch contributed by
739 user bes-internal on the mailing list.
741 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
743 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
744 selectors, in both main and reject logs.
746 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
749 JH/07 Add malware type "sock" for talking to simple daemon.
751 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
753 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
754 routers/transports under cutthrough routing.
756 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
757 numbers. Touch up "bool" conditional to keep the same definition.
759 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
761 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
763 JH/12 Expand items in router/transport headers_add or headers_remove lists
764 individually rather than the list as a whole. Bug 1452.
766 Required for reasonable handling of multiple headers_ options when
767 they may be empty; requires that headers_remove items with embedded
768 colons must have them doubled (or the list-separator changed).
770 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
771 view the policy declared in the DMARC record. Currently, $dmarc_status
772 is a combined value of both the record presence and the result of the
775 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
777 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
778 dnslookup router and the smtp transport (applying to the forward
781 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
782 of ldap servers used for a specific lookup. Patch provided by Heiko
785 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
786 New variable $lookup_dnssec_authenticated for observability.
788 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
789 Patch submitted by Lars Timman.
791 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
793 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
794 Requires trusted mode and valid format message id, aborts otherwise.
795 Patch contributed by Heiko Schlichting.
797 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
798 certextract with support for various fields. Bug 1358.
800 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
801 is requested by default, modifiable by smtp transport option
804 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
805 operate on certificate variables to give certificate fingerprints
806 Also new ${sha256:cert_variable}.
808 JH/23 The PRDR feature is moved from being Experimental into the mainline.
810 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
811 Christian Aistleitner.
813 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
815 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
816 file. Patch from Wolfgang Breyha.
818 JH/25 Expand the coverage of the delivery $host and $host_address to
819 client authenticators run in verify callout. Bug 1476.
821 JH/26 Port service names are now accepted for tls_on_connect_ports, to
822 align with daemon_smtp_ports. Bug 72.
824 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
825 support and error reporting did not work properly.
827 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
828 and is readable. Patch from Andrew Colin Kissa.
830 TL/14 Enhance documentation of ${run expansion and how it parses the
831 commandline after expansion, particularly in the case when an
832 unquoted variable expansion results in an empty value.
834 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
836 PP/02 Fix internal collision of T_APL on systems which support RFC3123
837 by renaming away from it. Addresses GH issue 15, reported by
840 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
842 TL/15 SECURITY: prevent double expansion in math comparison functions
843 (can expand unsanitized data). Not remotely exploitable.
850 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
852 PP/02 Make -n do something, by making it not do something.
853 When combined with -bP, the name of an option is not output.
855 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
858 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
859 $sender_host_name and config options to manage this, and basic check
862 PP/05 DSCP support for outbound connections and control modifier for inbound.
864 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
865 (Only plugin which currently uses this is kerberos4, which nobody should
866 be using, but we should make it available and other future plugins might
867 conceivably use it, even though it would break NAT; stuff *should* be
868 using channel bindings instead).
870 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
871 name; added for Sendmail compatibility; requires admin caller.
872 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
873 just ignore it); requires trusted caller.
874 Also parse but ignore: -Ac -Am -X<logfile>
877 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
879 TL/02 Add +smtp_confirmation as a default logging option.
881 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
882 Patch by Magnus Holmgren from 2007-02-20.
884 TL/04 Bugzilla 1281 - Spec typo.
885 Bugzilla 1283 - Spec typo.
886 Bugzilla 1290 - Spec grammar fixes.
888 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
890 TL/06 Add Experimental DMARC support using libopendmarc libraries.
892 TL/07 Fix an out of order global option causing a segfault. Reported to dev
893 mailing list by by Dmitry Isaikin.
895 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
897 JH/02 Support "G" suffix to numbers in ${if comparisons.
899 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
901 NM/01 Bugzilla 1197 - Spec typo
902 Bugzilla 1196 - Spec examples corrections
904 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
906 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
907 gnutls_enable_pkcs11, but renamed to more accurately indicate its
910 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
911 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
913 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
914 "acl {{name}{arg}...}", and optional args on acl condition
917 JH/05 Permit multiple router/transport headers_add/remove lines.
919 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
921 JH/07 Avoid using a waiting database for a single-message-only transport.
922 Performance patch from Paul Fisher. Bugzilla 1262.
924 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
927 JH/09 Add $headers_added variable, with content from use of ACL modifier
928 add_header (but not yet added to the message). Bugzilla 199.
930 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
931 Pulled from Bugzilla 817 by Wolfgang Breyha.
933 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
935 (nb: this is the same fix as in Exim 4.80.1)
937 JH/11 Add A= logging on delivery lines, and a client_set_id option on
940 JH/12 Add optional authenticated_sender logging to A= and a log_selector
943 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
945 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
946 advertise SMTP AUTH mechanism to us, instead of a generic
947 protocol violation error. Also, make Exim more robust to bad
948 data from the Dovecot auth socket.
950 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
952 When a queue runner is handling a message, Exim first routes the
953 recipient addresses, during which it prunes them based on the retry
954 hints database. After that it attempts to deliver the message to
955 any remaining recipients. It then updates the hints database using
958 So if a recipient address works intermittently, it can get repeatedly
959 deferred at routing time. The retry hints record remains fresh so the
960 address never reaches the final cutoff time.
962 This is a fairly common occurrence when a user is bumping up against
963 their storage quota. Exim had some logic in its local delivery code
964 to deal with this. However it did not apply to per-recipient defers
965 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
967 This change adds a proper retry rule check during routing so that the
968 final cutoff time is checked against the message's age. We only do
969 this check if there is an address retry record and there is not a
970 domain retry record; this implies that previous attempts to handle
971 the address had the retry_use_local_parts option turned on. We use
972 this as an approximation for the destination being like a local
973 delivery, as in LMTP.
975 I suspect this new check makes the old local delivery cutoff check
976 redundant, but I have not verified this so I left the code in place.
978 TF/02 Correct gecos expansion when From: is a prefix of the username.
980 Test 0254 submits a message to Exim with the header
984 When I ran the test suite under the user fanf2, Exim expanded
985 the header to contain my full name, whereas it should have added
986 a Resent-Sender: header. It erroneously treats any prefix of the
987 username as equal to the username.
989 This change corrects that bug.
991 GF/01 DCC debug and logging tidyup
992 Error conditions log to paniclog rather than rejectlog.
993 Debug lines prefixed by "DCC: " to remove any ambiguity.
995 TF/03 Avoid unnecessary rebuilds of lookup-related code.
997 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
998 Bug spotted by Jeremy Harris; was flawed since initial commit.
999 Would have resulted in OCSP responses post-SNI triggering an Exim
1000 NULL dereference and crash.
1002 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1004 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1005 Bug detection, analysis and fix by Samuel Thibault.
1006 Bugzilla 1331, Debian bug #698092.
1008 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1010 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1011 Server implementation by Todd Lyons, client by JH.
1012 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1013 config variable "prdr_enable" controls whether the server
1014 advertises the facility. If the client requests PRDR a new
1015 acl_data_smtp_prdr ACL is called once for each recipient, after
1016 the body content is received and before the acl_smtp_data ACL.
1017 The client is controlled by both of: a hosts_try_prdr option
1018 on the smtp transport, and the server advertisement.
1019 Default client logging of deliveries and rejections involving
1020 PRDR are flagged with the string "PRDR".
1022 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1023 fclose(). Diagnosis by Todd Lyons.
1025 PP/17 Update configure.default to handle IPv6 localhost better.
1026 Patch by Alain Williams (plus minor tweaks).
1029 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1030 This is now consistent with GnuTLS, and is now documented: the
1031 previous undocumented portable approach to treating the option as
1032 unset was to force an expansion failure. That still works, and
1033 an empty string is now equivalent.
1035 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1036 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1037 not performing validation itself.
1039 PP/20 Added force_command boolean option to pipe transport.
1040 Patch from Nick Koston, of cPanel Inc.
1042 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1045 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1047 PP/21 Fix eximon continuous updating with timestamped log-files.
1048 Broken in a format-string cleanup in 4.80, missed when I repaired the
1049 other false fix of the same issue.
1050 Report and fix from Heiko Schlichting.
1053 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1054 Report from Prashanth Katuri.
1056 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1057 It's SecureTransport, so affects any MacOS clients which use the
1058 system-integrated TLS libraries, including email clients.
1060 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1061 using a MIME ACL for non-SMTP local injection.
1062 Report and assistance in diagnosis by Warren Baker.
1064 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1066 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1068 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1069 last id that failed so it may be referenced in subsequent ACL's.
1071 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1074 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1075 ldap library initialization, allowing self-signed CA's to be
1076 used. Also properly sets require_cert option later in code by
1077 using NULL (global ldap config) instead of ldap handle (per
1078 session). Bug diagnosis and testing by alxgomz.
1080 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1081 the src/util/ subdirectory.
1083 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1084 renamed to Transport Post Delivery Action by Jeremy Harris, as
1087 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1088 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1089 redis_servers = needs to be configured which will be used by the redis
1090 lookup. Patch from Warren Baker, of The Packet Hub.
1092 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1094 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1095 hostname or reverse DNS when processing a host list. Used suggestions
1096 from multiple comments on this bug.
1098 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1100 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1101 Missed a few lines, added it to make the runtest require no keyboard
1104 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1105 contains upper case chars. Make router use caseful_local_part.
1107 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1108 support when GnuTLS has been built with p11-kit.
1114 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1116 This, or similar/improved, will also be change PP/11 of 4.82.
1122 PP/01 Handle short writes when writing local log-files.
1123 In practice, only affects FreeBSD (8 onwards).
1124 Bugzilla 1053, with thanks to Dmitry Isaikin.
1126 NM/01 Bugzilla 949 - Documentation tweak
1128 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1131 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1133 PP/02 Implemented gsasl authenticator.
1135 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1137 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1138 `pkg-config foo` for cflags/libs.
1140 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1141 with rest of GSASL and with heimdal_gssapi.
1143 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1144 `pkg-config foo` for cflags/libs for the TLS implementation.
1146 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1147 properties get this fed in as external SSF. A number of robustness
1148 and debugging improvements to the cyrus_sasl authenticator.
1150 PP/08 cyrus_sasl server now expands the server_realm option.
1152 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1153 Patch by Jeremy Harris.
1155 PP/10 Added dbmjz lookup type.
1157 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1159 PP/12 MAIL args handles TAB as well as SP, for better interop with
1160 non-compliant senders.
1161 Analysis and variant patch by Todd Lyons.
1163 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1164 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1165 Patch from Dirk Mueller <dmueller@suse.com>
1167 PP/13 tls_peerdn now print-escaped for spool files.
1168 Observed some $tls_peerdn in wild which contained \n, which resulted
1169 in spool file corruption.
1171 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1172 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1173 or write after TLS renegotiation, which otherwise led to messages
1176 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1177 as a tracking header (ie: a signed header comes before the signature).
1178 Patch from Wolfgang Breyha.
1180 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1181 comma-sep list; embedded commas doubled.
1183 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1185 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1187 Report and patch from Dmitry Banschikov.
1189 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1190 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1191 failures. We appear to now support TLS1.1+ with Exim.
1193 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1194 lets Exim select keys and certificates based upon TLS SNI from client.
1195 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1196 before an outbound SMTP session. New log_selector, +tls_sni.
1198 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1199 NULL dereference. Report and patch from Alun Jones.
1201 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1202 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1203 Not seeing resolver debug output on NetBSD, but suspect this is a
1204 resolver implementation change.
1206 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1207 Left warnings. Added "eximon gdb" invocation mode.
1209 PP/21 Defaulting "accept_8bitmime" to true, not false.
1211 PP/22 Added -bw for inetd wait mode support.
1213 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1214 locate the relevant includes and libraries. Made this the default.
1216 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1217 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1219 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1220 This may cause build issues on older platforms.
1222 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1223 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1224 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1225 Added SNI support via GnuTLS too.
1226 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1228 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1230 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1231 Applied second patch from Janne, implementing suggestion to default
1232 multiple-strings-in-record handling to match SPF spec.
1234 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1236 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1237 read-only, out of scope).
1238 Patch from Wolfgang Breyha, report from Stuart Northfield.
1240 PP/29 Fix three issues highlighted by clang analyser static analysis.
1241 Only crash-plausible issue would require the Cambridge-specific
1242 iplookup router and a misconfiguration.
1243 Report from Marcin Mirosław.
1245 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1247 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1248 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1249 As part of this, removing so much warning spew let me fix some minor
1250 real issues in debug logging.
1252 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1253 assignment on my part. Fixed.
1255 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1256 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1257 Janne Snabb (who went above and beyond: thank you).
1259 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1260 string otherwise requires a connection and a bunch more work and it's
1261 relatively easy to get wrong. Should also expose TLS library linkage
1264 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1265 64-bit ${eval} (JH/03).
1267 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1268 GNU libc to support some of the 64-bit stuff, should not lead to
1269 conflicts. Defined before os.h is pulled in, so if a given platform
1270 needs to override this, it can.
1272 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1273 protection layer was required, which is not implemented.
1274 Bugzilla 1254, patch from Wolfgang Breyha.
1276 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1277 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1278 tls_dhparam take prime identifiers. Also unbreak combination of
1279 OpenSSL+DH_params+TLSSNI.
1281 PP/39 Disable SSLv2 by default in OpenSSL support.
1287 PP/01 Solaris build fix for Oracle's LDAP libraries.
1288 Bugzilla 1109, patch from Stephen Usher.
1290 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1292 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1295 TF/02 Fix a couple more cases where we did not log the error message
1296 when unlink() failed. See also change 4.74-TF/03.
1298 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1299 lock up or crash if it happened to be inside a call to libc when it
1300 got a SIGUSR1 from exiwhat.
1302 The SIGUSR1 handler appends the current process status to the process
1303 log which is later printed by exiwhat. It used to use the general
1304 purpose logging code to do this, but several functions it calls are
1305 not safe for signals.
1307 The new output code in the SIGUSR1 handler is specific to the process
1308 log, and simple enough that it's easy to inspect for signal safety.
1309 Removing some special cases also simplifies the general logging code.
1310 Removing the spurious timestamps from the process log simplifies
1313 TF/04 Improved ratelimit ACL condition.
1315 The /noupdate option has been deprecated in favour of /readonly which
1316 has clearer semantics. The /leaky, /strict, and /readonly update modes
1317 are mutually exclusive. The update mode is no longer included in the
1318 database key; it just determines when the database is updated. (This
1319 means that when you upgrade Exim will forget old rate measurements.)
1321 Exim now checks that the per_* options are used with an update mode that
1322 makes sense for the current ACL. For example, when Exim is processing a
1323 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1324 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1325 must specify per_mail/readonly. If you omit the update mode it defaults to
1326 /leaky where that makes sense (as before) or /readonly where required.
1328 The /noupdate option is now undocumented but still supported for
1329 backwards compatibility. It is equivalent to /readonly except that in
1330 ACLs where /readonly is required you may specify /leaky/noupdate or
1331 /strict/noupdate which are treated the same as /readonly.
1333 A useful new feature is the /count= option. This is a generalization
1334 of the per_byte option, so that you can measure the throughput of other
1335 aggregate values. For example, the per_byte option is now equivalent
1336 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1338 The per_rcpt option has been generalized using the /count= mechanism
1339 (though it's more complicated than the per_byte equivalence). When it is
1340 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1341 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1342 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1343 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1344 Note that using per_rcpt with a non-readonly update mode in more than
1345 one ACL will cause the recipients to be double-counted. (The per_mail
1346 and per_byte options don't have this problem.)
1348 The handling of very low rates has changed slightly. If the computed rate
1349 is less than the event's count (usually one) then this event is the first
1350 after a long gap. In this case the rate is set to the same as this event's
1351 count, so that the first message of a spam run is counted properly.
1353 The major new feature is a mechanism for counting the rate of unique
1354 events. The new per_addr option counts the number of different
1355 recipients that someone has sent messages to in the last time period. It
1356 behaves like per_rcpt if all the recipient addresses are different, but
1357 duplicate recipient addresses do not increase the measured rate. Like
1358 the /count= option this is a general mechanism, so the per_addr option
1359 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1360 example, measure the rate that a client uses different sender addresses
1361 with the options per_mail/unique=$sender_address. There are further
1362 details in the main documentation.
1364 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1366 TF/06 Removed a few PCRE remnants.
1368 TF/07 Automatically extract Exim's version number from tags in the git
1369 repository when doing development or release builds.
1371 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1372 Bugzilla 879. Patch from Paul Fisher.
1374 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1375 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1378 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1380 PP/05 Variable $av_failed, true if the AV scanner deferred.
1381 Bugzilla 1078. Patch from John Horne.
1383 PP/06 Stop make process more reliably on build failure.
1384 Bugzilla 1087. Patch from Heiko Schlittermann.
1386 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1387 Bugzilla 1089. Patch from Heiko Schlittermann.
1389 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1390 Bugzilla 1131. Patch from Holger Weiß.
1392 PP/09 Handle IPv6 addresses with SPF.
1393 Bugzilla 860. Patch from Wolfgang Breyha.
1395 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1397 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1400 PP/11 match_* no longer expand right-hand-side by default.
1401 New compile-time build option, EXPAND_LISTMATCH_RHS.
1402 New expansion conditions, "inlist", "inlisti".
1404 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1406 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1408 PP/14 fix log_write() format string regression from TF/03.
1409 Bugzilla 1152. Patch from Dmitry Isaikin.
1415 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1417 PP/02 Harmonised TLS library version reporting; only show if debugging.
1418 Layout now matches that introduced for other libraries in 4.74 PP/03.
1420 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1422 PP/04 New "dns_use_edns0" global option.
1424 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1427 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1428 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1430 TK/01 Updated PolarSSL code to 0.14.2.
1431 Bugzilla 1097. Patch from Andreas Metzler.
1433 PP/07 Catch divide-by-zero in ${eval:...}.
1434 Fixes bugzilla 1102.
1436 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1439 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1440 format-string attack -- SECURITY: remote arbitrary code execution.
1442 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1443 time unintentionally subject to list matching rules, letting the header
1444 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1445 arbitrary string expansion). This allowed for information disclosure.
1447 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1448 INT_MIN/-1 -- value coerced to INT_MAX.
1454 NM/01 Workaround for PCRE version dependency in version reporting
1457 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1458 This fixes portability to compilers other than gcc, notably
1459 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1461 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1462 makefiles for portability to HP-UX and POSIX correctness.
1464 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1465 Also via indented variable definition in the Makefile.
1466 (Debugging by Oliver Heesakkers).
1468 PP/02 Restore caching of spamd results with expanded spamd_address.
1469 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1471 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1472 Improves build reliability. Fix from: Frank Elsner
1474 NM/02 Fix wide character breakage in the rfc2047 coding
1475 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1477 NM/03 Allow underscore in dnslist lookups
1478 Fixes bug 1026. Patch from Graeme Fowler
1480 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1481 Code patches from Adam Ciarcinski of NetBSD.
1483 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1486 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1487 is logged, to avoid truncation. Patch from John Horne.
1489 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1490 Patch from Jakob Hirsch.
1492 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1493 SQL string expansion failure details.
1494 Patch from Andrey Oktyabrski.
1496 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1497 Patch from Simon Arlott.
1499 PP/09 New lookups functionality failed to compile on old gcc which rejects
1500 extern declarations in function scope.
1501 Patch from Oliver Fleischmann
1503 PP/10 Use sig_atomic_t for flags set from signal handlers.
1504 Check getgroups() return and improve debugging.
1505 Fixed developed for diagnosis in bug 927 (which turned out to be
1508 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1509 Patch from Mark Zealey.
1511 PP/12 Bugzilla 1056: Improved spamd server selection.
1512 Patch from Mark Zealey.
1514 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1515 Based on patch from Heiko Schlittermann.
1517 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1518 Patch from Uwe Doering, sign-off by Michael Haardt.
1520 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1521 variable declaration deep within a block. Bug and patch from
1524 PP/15 lookups-Makefile IRIX compatibility coercion.
1526 PP/16 Make DISABLE_DKIM build knob functional.
1528 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1529 Patch by Simon Arlott
1531 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1532 variable argument macros. Our copy now differs from upstream.
1538 TF/01 Failure to get a lock on a hints database can have serious
1539 consequences so log it to the panic log.
1541 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1542 controlled using the smtp_confirmation log selector.
1544 TF/03 Include the error message when we fail to unlink a spool file.
1546 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1547 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1548 for maintaining out-of-tree patches for some time.
1550 PP/01 Bugzilla 139: Documentation and portability issues.
1551 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1552 Handle per-OS dynamic-module compilation flags.
1554 PP/02 Let /dev/null have normal permissions.
1555 The 4.73 fixes were a little too stringent and complained about the
1556 permissions on /dev/null. Exempt it from some checks.
1557 Reported by Andreas M. Kirchwitz.
1559 PP/03 Report version information for many libraries, including
1560 Exim version information for dynamically loaded libraries. Created
1561 version.h, now support a version extension string for distributors
1562 who patch heavily. Dynamic module ABI change.
1564 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1565 privilege escalation vulnerability whereby the Exim run-time user
1566 can cause root to append content of the attacker's choosing to
1569 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1572 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1573 If dropping privileges for untrusted macros, we disabled normal logging
1574 on the basis that it would fail; for the Exim run-time user, this is not
1575 the case, and it resulted in successful deliveries going unlogged.
1576 Fixed. Reported by Andreas Metzler.
1582 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1583 only prepend for the Resent-* case. Fixes regression introduced in
1584 Exim 4.70 by NM/22 for Bugzilla 607.
1586 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1587 increasing numbers of administrators be bitten by this.
1589 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1591 PP/03 Bugzilla 994: added openssl_options main configuration option.
1593 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1595 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1597 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1599 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1600 without a peer certificate, leading to a segfault because of an
1601 assumption that peers always have certificates. Be a little more
1602 paranoid. Problem reported by Martin Tscholak.
1604 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1605 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1606 NB: ClamAV planning to remove STREAM in "middle of 2010".
1607 CL also introduces -bmalware, various -d+acl logging additions and
1608 more caution in buffer sizes.
1610 PP/09 Implemented reverse_ip expansion operator.
1612 PP/10 Bugzilla 937: provide a "debug" ACL control.
1614 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1616 PP/12 Bugzilla 973: Implement --version.
1618 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1620 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1622 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1624 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1625 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1626 ignore trailing whitespace.
1628 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1630 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1633 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1634 Notification from Dr Andrew Aitchison.
1636 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1637 ExtendedDetectionInfo response format.
1638 Notification from John Horne.
1640 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1643 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1644 XSL and documented dependency on system catalogs, with examples of how
1647 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1650 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1651 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1652 configuration file which is writeable by the Exim user or group.
1654 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1655 of configuration files to cover files specified with the -C option if
1656 they are going to be used with root privileges, not just the default
1659 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1660 option (effectively making it always true).
1662 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1663 files to be used while preserving root privileges.
1665 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1666 that rogue child processes cannot use them.
1668 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1669 run-time user, instead of root.
1671 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1672 Exim run-time user without dropping privileges.
1674 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1675 result string, instead of calling string_vformat() twice with the same
1678 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1679 for other users. Others should always drop root privileges if they use
1680 -C on the command line, even for a whitelisted configure file.
1682 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1684 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1690 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1691 $data_path, and $header_path variables; fixed documentation bugs and
1694 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1695 exipick to access non-standard spools, including the "frozen" queue
1698 NM/01 Bugzilla 965: Support mysql stored procedures.
1699 Patch from Alain Williams
1701 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1703 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1704 Patch from Andreas Metzler
1706 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1707 Patch from Kirill Miazine
1709 NM/05 Bugzilla 671: Added umask to procmail example.
1711 JJ/03 installed exipick 20100323.0, fixing doc bug
1713 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1714 directory. Notification and patch from Dan Rosenberg.
1716 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1718 TK/02 Improve log output when DKIM signing operation fails.
1720 MH/01 Treat the transport option dkim_domain as a colon separated
1721 list, not as a single string, and sign the message with each element,
1722 omitting multiple occurences of the same signer.
1724 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1725 Bugzilla 985, 986. Patch by Simon Arlott
1727 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1728 Patch by Simon Arlott
1730 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1731 MBX locking. Notification from Dan Rosenberg.
1737 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1739 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1741 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1743 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1745 NM/04 Bugzilla 915: Flag broken perl installation during build.
1751 TK/01 Added patch by Johannes Berg that expands the main option
1752 "spamd_address" if it starts with a dollar sign.
1754 TK/02 Write list of recipients to X-Envelope-Sender header when building
1755 the mbox-format spool file for content scanning (suggested by Jakob
1758 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1759 (http://www.dcc-servers.net/) support via dccifd. Activated by
1760 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1762 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1763 by Mark Daniel Reidel <mr@df.eu>.
1765 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1766 When building exim an external PCRE library is now needed -
1767 PCRE is a system library on the majority of modern systems.
1768 See entry on PCRE_LIBS in EDITME file.
1770 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1771 conversation. Added nologin parameter to request.
1772 Patch contributed by Kirill Miazine.
1774 TF/01 Do not log submission mode rewrites if they do not change the address.
1776 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1778 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1779 log files in place. Contributed by Roberto Lima.
1781 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1783 TF/03 Bugzilla 615: When checking the local_parts router precondition
1784 after a local_part_suffix or local_part_prefix option, Exim now
1785 does not use the address's named list lookup cache, since this
1786 contains cached lookups for the whole local part.
1788 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1789 Robert Millan. Documentation is in experimental-spec.txt.
1791 TF/04 Bugzilla 668: Fix parallel build (make -j).
1793 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1795 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1796 Patch provided by Jan Srzednicki.
1798 TF/05 Leading white space used to be stripped from $spam_report which
1799 wrecked the formatting. Now it is preserved.
1801 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1802 that they are available at delivery time.
1804 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1806 TF/08 TLS error reporting now respects the incoming_interface and
1807 incoming_port log selectors.
1809 TF/09 Produce a more useful error message if an SMTP transport's hosts
1810 setting expands to an empty string.
1812 NM/06 Bugzilla 744: EXPN did not work under TLS.
1813 Patch provided by Phil Pennock.
1815 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1816 Patch provided by Richard Godbee.
1818 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1819 acl_smtp_notquit, added index entry.
1821 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1822 Patch provided by Eugene Bujak.
1824 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1825 accept(). Patch provided by Maxim Dounin.
1827 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1828 Patch provided by Phil Pennock.
1830 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1832 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1833 Patch provided by Brad "anomie" Jorsch.
1835 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1836 Patch provided by Dean Brooks.
1838 TK/05 Add native DKIM support (does not depend on external libraries).
1840 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1841 Patch provided by Graeme Fowler.
1843 NM/16 Bugzilla 851: Documentation example syntax fix.
1845 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1847 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1850 NM/19 Bugzilla 745: TLS version reporting.
1851 Patch provided by Phil Pennock.
1853 NM/20 Bugzilla 167: bool: condition support.
1854 Patch provided by Phil Pennock.
1856 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1857 clients. Patch provided by Phil Pennock.
1859 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1860 Patch provided by Brad "anomie" Jorsch.
1862 NM/23 Bugzilla 687: Fix misparses in eximstats.
1863 Patch provided by Heiko Schlittermann.
1865 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1866 Patch provided by Heiko Schlittermann.
1868 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1869 plus update to original patch.
1871 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1873 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1874 Patch provided by David Brownlee.
1876 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1878 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1880 NM/30 Bugzilla 888: TLS documentation bugfixes.
1882 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1884 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1885 Unlike the original bugzilla I have changed all shell scripts in src tree.
1887 NM/33 Bugzilla 898: Transport filter timeout fix.
1888 Patch by Todd Rinaldo.
1890 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1891 Patch by Serge Demonchaux.
1893 NM/35 Bugzilla 39: Base64 decode bug fixes.
1894 Patch by Jakob Hirsch.
1896 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1898 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1900 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1902 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1908 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1909 ALT-N's libdkim that I have put here:
1910 http://duncanthrax.net/exim-experimental/
1912 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1913 were called 'true' and it seems that C99 defines that as a reserved
1914 keyword to be used with 'bool' variable types. That means you could
1915 not include C99-style headers which use bools without triggering
1916 build errors in sieve.c.
1918 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1919 as mailq or other aliases. Changed the --help handling significantly
1920 to do whats expected. exim_usage() emits usage/help information.
1922 SC/01 Added the -bylocaldomain option to eximstats.
1924 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1926 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1928 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1934 PH/01 Another patch from the Sieve maintainer.
1936 PH/02 When an IPv6 address is converted to a string for single-key lookup
1937 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1938 dots are used instead of colons so that keys in lsearch files need not
1939 contain colons. This was done some time before quoting was made available
1940 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1941 (notated using the quote facility) so as to distinguish them from IPv4
1942 keys. This meant that lookups for IP addresses in host lists did not work
1943 for iplsearch lookups.
1945 This has been fixed by arranging for IPv6 addresses to be expressed with
1946 colons if the lookup type is iplsearch. This is not incompatible, because
1947 previously such lookups could never work.
1949 The situation is now rather anomalous, since one *can* have colons in
1950 ordinary lsearch keys. However, making the change in all cases is
1951 incompatible and would probably break a number of configurations.
1953 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1956 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1957 conversion specification without a maximum field width, thereby enabling
1958 a rogue spamd server to cause a buffer overflow. While nobody in their
1959 right mind would setup Exim to query an untrusted spamd server, an
1960 attacker that gains access to a server running spamd could potentially
1961 exploit this vulnerability to run arbitrary code as the Exim user.
1963 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1964 $primary_hostname instead of what libspf2 thinks the hosts name is.
1966 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1967 a directory entry by the name of the lookup key. Previously, if a
1968 symlink pointed to a non-existing file or a file in a directory that
1969 Exim lacked permissions to read, a lookup for a key matching that
1970 symlink would fail. Now it is enough that a matching directory entry
1971 exists, symlink or not. (Bugzilla 503.)
1973 PH/03 The body_linecount and body_zerocount variables are now exported in the
1976 PH/04 Added the $dnslist_matched variable.
1978 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1979 This means they are set thereafter only if the connection becomes
1982 PH/06 Added the client_condition to authenticators so that some can be skipped
1983 by clients under certain conditions.
1985 PH/07 The error message for a badly-placed control=no_multiline_responses left
1986 "_responses" off the end of the name.
1988 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1990 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1991 (without spaces) instead of just copying the configuration text.
1993 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1995 PH/11 Added $max_received_linelength.
1997 PH/12 Added +ignore_defer and +include_defer to host lists.
1999 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2000 way in which PCRE > 7.0 is built.
2002 PH/14 Implemented queue_only_load_latch.
2004 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2005 MAIL command. The effect was to mangle the value on 64-bit systems.
2007 PH/16 Another patch from the Sieve maintainer.
2009 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2011 PH/18 If a system quota error occurred while trying to create the file for
2012 a maildir delivery, the message "Mailbox is full" was not appended to the
2013 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2014 only to a quota excession during the actual writing of the file.
2016 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2017 characters?) which causes problems in log lines. The DN values are now
2018 passed through string_printing() before being added to log lines.
2020 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2021 and InterBase are left for another time.)
2023 PH/21 Added message_body_newlines option.
2025 PH/22 Guard against possible overflow in moan_check_errorcopy().
2027 PH/23 POSIX allows open() to be a macro; guard against that.
2029 PH/24 If the recipient of an error message contained an @ in the local part
2030 (suitably quoted, of course), incorrect values were put in $domain and
2031 $local_part during the evaluation of errors_copy.
2037 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2038 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2041 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2042 issue a MAIL command.
2044 PH/02 In an ACL statement such as
2046 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2048 if a client was not listed at all, or was listed with a value other than
2049 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2050 the condition was not true (as it should be), so access was not denied.
2051 The bug was that the ! inversion was incorrectly passed on to the second
2052 item. This has been fixed.
2054 PH/03 Added additional dnslists conditions == and =& which are different from
2055 = and & when the dns lookup returns more than one IP address.
2057 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2058 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2060 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2061 FSYNC, which compiles an option called disable_fsync that allows for
2062 bypassing fsync(). The documentation is heavily laced with warnings.
2064 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2066 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2067 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2068 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2069 including adding "make clean"; (3) Added -fPIC when compiling the test
2070 dynamically loaded module, to get rid of a warning.
2072 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2073 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2074 = 0s. The bug is otherwise harmless.
2076 PH/07 There was a bug in the dovecot authenticator such that the value of
2077 $auth1 could be overwritten, and so not correctly preserved, after a
2078 successful authentication. This usually meant that the value preserved by
2079 the server_setid option was incorrect.
2081 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2083 PH/09 Installed PCRE release 7.0.
2085 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2086 run for batched SMTP input. It is now run at the start of every message
2087 in the batch. While fixing this I discovered that the process information
2088 (output by running exiwhat) was not always getting set for -bs and -bS
2089 input. This is fixed, and it now also says "batched" for BSMTP.
2091 PH/11 Added control=no_pipelining.
2093 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2094 patch, slightly modified), and move the expansion of helo_data till after
2095 the connection is made in the smtp transport (so it can use these
2098 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2100 PH/14 Added log_selector = +pid.
2102 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2104 PH/16 Add ${if forany and ${if forall.
2106 PH/17 Added dsn_from option to vary the From: line in DSNs.
2108 PH/18 Flush SMTP output before performing a callout, unless control =
2109 no_callout_flush is set.
2111 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2112 was true (the default) a successful delivery failed to delete the retry
2113 item, thus causing premature timeout of the address. The bug is now
2116 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2118 PH/21 Long custom messages for fakedefer and fakereject are now split up
2119 into multiline responses in the same way that messages for "deny" and
2120 other ACL rejections are.
2122 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2123 with slight modification.
2125 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2126 draft, changing the syntax and factoring some duplicate code".
2128 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2129 for deliveries of the second and subsequent messages over the same SMTP
2132 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2133 ${reduce, with only minor "tidies".
2135 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2137 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2138 expansion side effects.
2140 PH/27 When a message times out after an over-quota error from an Exim-imposed
2141 quota, the bounce message says "mailbox is full". This message was not
2142 being given when it was a system quota that was exceeded. It now should
2145 MH/03 Made $recipients available in local_scan(). local_scan() already has
2146 better access to the recipient list through recipients_list[], but
2147 $recipients can be useful in postmaster-provided expansion strings.
2149 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2150 in the case of a MAIL command with additional options following the
2151 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2152 were accidentally chopped off.
2154 PH/29 SMTP synchronization checks are implemented when a command is read -
2155 there is a check that no more input is waiting when there shouldn't be
2156 any. However, for some commands, a delay in an ACL can mean that it is
2157 some time before the response is written. In this time, more input might
2158 arrive, invalidly. So now there are extra checks after an ACL has run for
2159 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2160 pipelining has not been advertised.
2162 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2164 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2165 returned in the SMTP response when smtp_return_error_details was false.
2166 This has been fixed.
2168 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2169 instead of the C I/O that was originally supplied, because problems were
2170 reported on Solaris.
2172 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2173 Exim which did not show up earlier: it was assuming that a call to
2174 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2175 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2176 was a macro that became an assignment, so it seemed to work. This has
2177 changed to a proper function call with a void return, hence the compile
2178 error. Exim's code has been fixed.
2180 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2183 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2185 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2187 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2188 because it turns out to be too big or there is a timeout) there is no
2189 "Completed" line in the log. When some messages of this type were
2190 selected by exigrep, they were listed as "not completed". Others were
2191 picked up by some special patterns. I have improved the selection
2192 criteria to be more general.
2194 PH/38 The host_find_failed option in the manualroute router can now be set
2195 to "ignore", to completely ignore a host whose IP address cannot be
2196 found. If all hosts are ignored, the behaviour is controlled by the new
2197 host_all_ignored option.
2199 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2200 homing or because of multiple MX records with /mx) generated more than
2201 one IP address, and the following item turned out to be the local host,
2202 all the secondary addresses of the first item were incorrectly removed
2203 from the list, along with the local host and any following hosts (which
2204 is what is supposed to happen).
2206 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2207 whoever called Exim into the -H file. In the case of the daemon it was
2208 behaving confusingly. When first started, it used values for whoever
2209 started the daemon, but after a SIGHUP it used the Exim user (because it
2210 calls itself on a restart). I have changed the code so that it now always
2213 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2214 message are rejected with the same error (e.g. no authentication or bad
2215 sender address), and a DATA command is nevertheless sent (as can happen
2216 with PIPELINING or a stupid MUA), the error message that was given to the
2217 RCPT commands is included in the rejection of the DATA command. This is
2218 intended to be helpful for MUAs that show only the final error to their
2221 PH/42 Another patch from the Sieve maintainer.
2223 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2224 Eximstats - Fixed some broken HTML links and added missing column headers
2226 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2227 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2229 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2231 PH/43 Yet another patch from the Sieve maintainer.
2233 PH/44 I found a way to check for a TCP/IP connection going away before sending
2234 the response to the final '.' that terminates a message, but only in the
2235 case where the client has not sent further data following the '.'
2236 (unfortunately, this is allowed). However, in many cases there won't be
2237 any further data because there won't be any more messages to send. A call
2238 to select() can be used: if it shows that the input is "ready", there is
2239 either input waiting, or the socket has been closed. An attempt to read
2240 the next input character can distinguish the two cases. Previously, Exim
2241 would have sent an OK response which the client would never have see.
2242 This could lead to message repetition. This fix should cure that, at
2243 least in a lot of common cases.
2245 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2246 advertised in response to EHLO.
2252 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2253 fixed by 4.65/MH/01 (is this a record?) are fixed:
2255 (i) An empty string was always treated as zero by the numeric comparison
2256 operators. This behaviour has been restored.
2258 (ii) It is documented that the numeric comparison operators always treat
2259 their arguments as decimal numbers. This was broken in that numbers
2260 starting with 0 were being interpreted as octal.
2262 While fixing these problems I realized that there was another issue that
2263 hadn't been noticed. Values of message_size_limit (both the global option
2264 and the transport option) were treated as octal if they started with 0.
2265 The documentation was vague. These values are now always treated as
2266 decimal, and I will make that clear in the documentation.
2272 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2273 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2276 MH/01 Don't check that the operands of numeric comparison operators are
2277 integers when their expansion is in "skipping" mode (fixes bug
2278 introduced by 4.64-PH/07).
2280 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2281 child addresses, Exim now panics and dies. Previously, because the count
2282 is held in a short int, deliveries were likely to be lost. As such a
2283 large number of recipients for a single message is ridiculous
2284 (performance will be very, very poor), I have chosen to impose a limit
2285 rather than extend the field.
2291 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2292 leftover -K file (the existence of which was triggered by #402).
2293 While we were at it, introduced process PID as part of the -K
2294 filename. This should rule out race conditions when creating
2297 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2298 processing considerably. Previous code took too long for large mails,
2299 triggering a timeout which in turn triggers #401.
2301 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2302 in the DK code in transports.c. sendfile() is not really portable,
2303 hence the _LINUX specificness.
2305 TF/01 In the add_headers option to the mail command in an Exim filter,
2306 there was a bug that Exim would claim a syntax error in any
2307 header after the first one which had an odd number of characters
2310 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2311 callout verification, Exim cached a "reject" for the entire domain. This
2312 is correct for most verifications, but it is not correct for a recipient
2313 verification with use_sender or use_postmaster set, because in that case
2314 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2315 case of MAIL FROM:<> rejection from other early rejections (e.g.
2316 rejection of HELO). When verifying a recipient using a non-null MAIL
2317 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2318 Whatever the result of the callout, the value of the domain cache is
2319 left unchanged (for any other kind of callout, getting as far as trying
2320 RCPT means that the domain itself is ok).
2322 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2325 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2326 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2327 session, the daemon ignores ECONNECT errors and logs others; it now
2328 ignores EPIPE as well.
2330 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2331 (quoted-printable decoding).
2333 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2334 later the small subsequent patch to fix an introduced bug.
2336 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2338 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2340 PH/08 An error is now given if message_size_limit is specified negative.
2342 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2343 to be given (somewhat) arbitrary names.
2345 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2348 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2349 miscellaneous code fixes
2351 PH/10 Added the log_reject_target ACL modifier to specify where to log
2354 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2355 hostname. This is wrong, because it relates to the incoming message (and
2356 probably the interface on which it is arriving) and not to the outgoing
2357 callout (which could be using a different interface). This has been
2358 changed to use the value of the helo_data option from the smtp transport
2359 instead - this is what is used when a message is actually being sent. If
2360 there is no remote transport (possible with a router that sets up host
2361 addresses), $smtp_active_hostname is used.
2363 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2364 tweaks were necessary in order to get it to work (see also 21 below):
2365 (a) The code assumed that strncpy() returns a negative number on buffer
2366 overflow, which isn't the case. Replaced with Exim's string_format()
2368 (b) There were several signed/unsigned issues. I just did the minimum
2369 hacking in of casts. There is scope for a larger refactoring.
2370 (c) The code used strcasecmp() which is not a standard C function.
2371 Replaced with Exim's strcmpic() function.
2372 (d) The code set only $1; it now sets $auth1 as well.
2373 (e) A simple test gave the error "authentication client didn't specify
2374 service in request". It would seem that Dovecot has changed its
2375 interface. Fortunately there's a specification; I followed it and
2376 changed what the client sends and it appears to be working now.
2378 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2381 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2382 address A is aliased to B and C, where B exists and C does not. Without
2383 -v the output is "A verified" because verification stops after a
2384 successful redirection if more than one address is generated. However,
2385 with -v the child addresses are also verified. Exim was outputting "A
2386 failed to verify" and then showing the successful verification for C,
2387 with its parentage. It now outputs "B failed to verify", showing B's
2388 parentage before showing the successful verification of C.
2390 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2391 look up a TXT record in a specific list after matching in a combined
2394 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2395 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2396 they consult the DNS. I had assumed they would set it the way they
2397 wanted; and indeed my experiments on Linux seem to show that in some
2398 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2399 To be on the safe side, however, I have now made the interface to
2400 host_find_byname() similar to host_find_bydns(), with an argument
2401 containing the DNS resolver options. The host_find_byname() function now
2402 sets these options at its start, just as host_find_bydns() does. The smtp
2403 transport options dns_qualify_single and dns_search_parents are passed to
2404 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2405 of host_find_byname() use the default settings of RES_DEFNAMES
2406 (qualify_single) but not RES_DNSRCH (search_parents).
2408 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2409 spool_read_header() do less string testing, by means of a preliminary
2410 switch on the second character of optional "-foo" lines. (This is
2411 overdue, caused by the large number of possibilities that now exist.
2412 Originally there were few.) While I was there, I also converted the
2413 str(n)cmp tests so they don't re-test the leading "-" and the first
2414 character, in the hope this might squeeze out yet more improvement.
2416 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2417 flag allowing group syntax was set by the header_syntax check but not
2418 turned off, possible causing trouble later; (2) The flag was not being
2419 set at all for the header_verify test, causing "group"-style headers to
2420 be rejected. I have now set it in this case, and also caused header_
2421 verify to ignore an empty address taken from a group. While doing this, I
2422 came across some other cases where the code for allowing group syntax
2423 while scanning a header line wasn't quite right (mostly, not resetting
2424 the flag correctly in the right place). These bugs could have caused
2425 trouble for malformed header lines. I hope it is now all correct.
2427 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2428 with the "reply" argument non-NULL. The code, however (which originally
2429 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2430 but it didn't always do it. This confused somebody who was copying the
2431 code for some other use. I have removed all the tests.
2433 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2434 feature that was used to support insecure browsers during the U.S. crypto
2435 embargo. It requires special client support, and Exim is probably the
2436 only MTA that supported it -- and would never use it because real RSA is
2437 always available. This code has been removed, because it had the bad
2438 effect of slowing Exim down by computing (never used) parameters for the
2439 RSA_EXPORT functionality.
2441 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2442 authenticator to fail if there's a tab character in the incoming data
2443 (there should never be unless someone is messing about, as it's supposed
2444 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2445 if the connection is using TLS or if the remote IP is the same as the
2446 local IP, and the "valid-client-cert option" if a client certificate has
2449 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2450 authenticators. This can be used for authorization after authentication
2451 succeeds. (In the case of plaintext, it servers for both authentication
2454 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2455 if any retry times were supplied.
2457 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2458 connection, where there is no client IP address to check. In this
2459 situation, the verify now always succeeds.
2461 PH/25 Applied John Jetmore's -Mset patch.
2463 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2465 PH/27 In a string expansion for a processed (not raw) header when multiple
2466 headers of the same name were present, leading whitespace was being
2467 removed from all of them, but trailing whitespace was being removed only
2468 from the last one. Now trailing whitespace is removed from each header
2469 before concatenation. Completely empty headers in a concatenation (as
2470 before) are ignored.
2472 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2473 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2475 PH/29 [Removed. This was a change that I later backed out, and forgot to
2476 correct the ChangeLog entry (that I had efficiently created) before
2477 committing the later change.]
2479 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2480 address errors (4xx response to RCPT) over the same connection as other
2481 messages routed to the same hosts. Such deliveries are always "forced",
2482 so retry times are not inspected. This resulted in far too many retries
2483 for the affected addresses. The effect occurred only when there were more
2484 hosts than the hosts_max_try setting in the smtp transport when it had
2485 the 4xx errors. Those hosts that it had tried were not added to the list
2486 of hosts for which the message was waiting, so if all were tried, there
2487 was no problem. Two fixes have been applied:
2489 (i) If there are any address or message errors in an SMTP delivery, none
2490 of the hosts (tried or untried) are now added to the list of hosts
2491 for which the message is waiting, so the message should not be a
2492 candidate for sending over the same connection that was used for a
2493 successful delivery of some other message. This seems entirely
2494 reasonable: after all the message is NOT "waiting for some host".
2495 This is so "obvious" that I'm not sure why it wasn't done
2496 previously. Hope I haven't missed anything, but it can't do any
2497 harm, as the worst effect is to miss an optimization.
2499 (ii) If, despite (i), such a delivery is accidentally attempted, the
2500 routing retry time is respected, so at least it doesn't keep
2501 hammering the server.
2503 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2504 in ${readsocket because some servers need this prod.
2506 PH/32 Added some extra debug output when updating a wait-xxx database.
2508 PH/33 The hint "could be header name not terminated by colon", which has been
2509 given for certain expansion errors for a long time, was not being given
2510 for the ${if def:h_colon_omitted{... case.
2512 PH/34 The spec says: "With one important exception, whenever a domain list is
2513 being scanned, $domain contains the subject domain." There was at least
2514 one case where this was not true.
2516 PH/35 The error "getsockname() failed: connection reset by peer" was being
2517 written to the panic log as well as the main log, but it isn't really
2518 panic-worthy as it just means the connection died rather early on. I have
2519 removed the panic log writing for the ECONNRESET error when getsockname()
2522 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2523 runs only) independently of the message's sender address. This meant
2524 that, if the 4xx error was in fact related to the sender, a different
2525 message to the same recipient with a different sender could confuse
2526 things. In particular, this can happen when sending to a greylisting
2527 server, but other circumstances could also provoke similar problems.
2528 I have changed the default so that the retry time for these errors is now
2529 based a combination of the sender and recipient addresses. This change
2530 can be overridden by setting address_retry_include_sender=false in the
2533 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2534 remote server are returned as part of bounce messages. This was not
2535 happening for LMTP over a pipe (the lmtp transport), but now it is the
2536 same for both kinds of LMTP.
2538 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2539 in header lines that were in fact CNAMEs. This is no longer the case.
2541 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2542 and queue runs started by the daemon processed all messages. This has
2543 been fixed so that -R and -S can now usefully be given with -q<time>.
2545 PH/40 Import PCRE release 6.7 (fixes some bugs).
2547 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2549 PH/42 Give an error if -q is specified more than once.
2551 PH/43 Renamed the variables $interface_address and $interface_port as
2552 $received_ip_address and $received_port, to make it clear that these
2553 values apply to message reception, and not to the outgoing interface when
2554 a message is delivered. (The old names remain recognized, of course.)
2556 PH/44 There was no timeout on the connect() call when using a Unix domain
2557 socket in the ${readsocket expansion. There now is.
2559 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2560 be meaningful with "accept".
2562 SC/01 Eximstats V1.43
2563 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2565 SC/02 Eximstats V1.44
2566 Use a glob alias rather than an array ref in the generated
2567 parser. This improves both readability and performance.
2569 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2570 Collect SpamAssassin and rejection statistics.
2571 Don't display local sender or destination tables unless
2572 there is data to show.
2573 Added average volumes into the top table text output.
2575 SC/04 Eximstats V1.46
2576 Collect data on the number of addresses (recipients)
2577 as well as the number of messages.
2579 SC/05 Eximstats V1.47
2580 Added 'Message too big' to the list of mail rejection
2581 reasons (thanks to Marco Gaiarin).
2583 SC/06 Eximstats V1.48
2584 Mainlog lines which have GMT offsets and are too short to
2585 have a flag are now skipped.
2587 SC/07 Eximstats V1.49 (Alain Williams)
2588 Added the -emptyok flag.
2590 SC/08 Eximstats V1.50
2591 Fixes for obtaining the IP address from reject messages.
2593 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2594 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2595 whitespace changes from 4.64-PH/27
2597 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2600 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2601 are found, allow negative numbers in numeric criteria)
2603 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2605 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2606 to match changes made in 4.64-PH/43
2608 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2610 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2611 "domain" is actually an IP address, and force a failure. This locks out
2612 those revolvers/nameservers that support "A-for-A" lookups, in
2613 contravention of the specifications.
2615 PH/48 When a host name was looked up from an IP address, and the subsequent
2616 forward lookup of the name timed out, the host name was left in
2617 $sender_host_name, contrary to the specification.
2619 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2620 restricted to single-key lookups, Exim was not diagnosing an error if
2621 * or *@ was used with a query-style lookup.
2623 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2625 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2626 long ago, but noone interested enough thought of it. Let's just say that
2627 the "1.1" means that there are some new functions that weren't there at
2628 some point in the past.
2630 PH/51 Error processing for expansion failure of helo_data from an smtp
2631 transport during callout processing was broken.
2633 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2634 tested/used via the -bh/-bhc/-bs options.
2636 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2637 bug, fixed in subsequent PCRE releases).
2639 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2640 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2642 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2648 SC/01 Use a glob alias rather than an array ref in eximstats generated
2649 parser. This improves both readability and performance.
2651 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2652 Don't display local sender or destination tables in eximstats unless
2653 there is data to show.
2654 Added average volumes into the eximstats top table text output.
2656 SC/03 Collect data on the number of addresses (recipients) as well
2657 as the number of messages in eximstats.
2659 TF/01 Correct an error in the documentation for the redirect router. Exim
2660 does (usually) call initgroups() when daemonizing.
2662 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2663 with consistent privilege compared to when running as a daemon.
2665 TF/03 Note in the spec that $authenticated_id is not set for local
2666 submissions from trusted users.
2668 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2669 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2671 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2672 by adding some example configuration directives to the default
2673 configuration file. A little bit of work is required to uncomment the
2674 directives and define how usernames and passwords are checked, but
2675 there is now a framework to start from.
2677 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2678 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2679 without this. I don't know how relevant this is to other LDAP libraries.
2681 PH/02 Add the verb name to the "unknown ACL verb" error.
2683 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2685 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2687 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2688 directory not expanded when it should be if an expanded home directory
2689 was set for the address (which is overridden by the transport).
2691 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2694 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2695 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2696 because it is too late at that time, and has no effect.
2698 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2699 security issue with \' (bugzilla #107). I could not use the
2700 PQescapeStringConn() function, because it needs a PGconn value as one of
2703 PH/08 When testing addresses using -bt, indicate those final addresses that
2704 are duplicates that would not cause an additional delivery. At least one
2705 person was confused, thinking that -bt output corresponded to deliveries.
2706 (Suppressing duplicates isn't a good idea as you lose the information
2707 about possibly different redirections that led to the duplicates.)
2709 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2710 systems where poll() doesn't work, in particular OS X.
2712 PH/10 Added more information to debugging output for retry time not reached.
2714 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2715 operations in malware.c.
2717 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2720 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2721 syslog_duplication set false, log lines that would normally be written
2722 both the the main log and to the reject log were not written to syslog at
2725 PH/14 In the default configuration, change the use of "message" in ACL warn
2726 statements to "add_header".
2728 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2729 not followed by a command (e.g. "seen endif").
2731 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2732 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2735 PH/17 Added extra conditions to the default value of delay_warning_condition
2739 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2740 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2741 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2744 The Auto-Submitted: and various List- headers are standardised, whereas I
2745 don't think Precedence: ever was.
2747 PH/18 Refactored debugging code in route_finduser() to show more information,
2748 in particular, the error code if getpwnam() issues one.
2750 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2751 This is apparently needed in addition to the PH/07 change above to avoid
2752 any possible encoding problems.
2754 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2755 but not after initializing Perl.
2757 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2758 output them only if debugging. By default they are written stderr,
2759 apparently, which is not desirable.
2761 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2764 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2767 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2769 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2770 authenticated or an ident call has been made. Suppress the default
2771 values for $authenticated_id and $authenticated_sender (but permit -oMai
2772 and -oMas) when testing with -bh.
2774 PH/24 Re-jigged the order of the tests in the default configuration so that the
2775 tests for valid domains and recipients precede the DNS black list and CSA
2776 tests, on the grounds that those ones are more expensive.
2778 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2779 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2780 This bug exists in every version of Exim that I still have, right back to
2783 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2784 However, an attempt to turn on case-sensitivity in a regex key by
2785 including (?-i) didn't work because the subject string was already
2786 lowercased, and the effects were non-intuitive. It turns out that a
2787 one-line patch can be used to allow (?-i) to work as expected.
2793 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2794 other effects) broke the use of negated acl sub-conditions.
2796 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2799 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2800 "Deny" causes Exim to reject the incoming connection with a 554 error.
2801 Unfortunately, if there is a major crisis, such as a disk failure,
2802 tcp-wrappers gives "deny", whereas what one would like would be some
2803 kind of temporary error. A kludge has been added to help with this.
2804 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2805 554 error is used if errno is still zero or contains ENOENT (which occurs
2806 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2809 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2811 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2812 errors. Otherwise a message that provokes a temporary error (when other
2813 messages do not) can cause a whole host to time out.
2815 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2816 addresses were routed directly to files or pipes from a redirect router.
2817 File deliveries just didn't batch; pipe deliveries might have suffered
2820 PH/06 A failure to get a lock for a hints database would erroneously always say
2821 "Failed to get write lock", even when it was really a read lock.
2823 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2824 of 0600. This has been changed to use the value of the lockfile_mode
2825 option (which defaults to 0600).
2827 PH/08 Applied small patch from the Sieve maintainer.
2829 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2830 folder from quota calculations, a direct delivery into this folder messed
2831 up the contents of the maildirsize file. This was because the regex was
2832 used only to exclude .Trash (or whatever) when the size of the mailbox
2833 was calculated. There was no check that a delivery was happening into an
2834 excluded directory. This bug has been fixed by ignoring all quota
2835 processing for deliveries into excluded directories.
2837 PH/10 Added the maildirfolder_create_regex option to appendfile.
2843 PH/01 The code for finding all the local interface addresses on a FreeBSD
2844 system running IPv6 was broken. This may well have applied to all BSD
2845 systems, as well as to others that have similar system calls. The broken
2846 code found IPv4 interfaces correctly, but gave incorrect values for the
2847 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2848 that it would not match correctly against @[] and not recognize the IPv6
2851 PH/02 The ipliteral router was not recognizing addresses of the form user@
2852 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2854 PH/03 Added disable_ipv6.
2856 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2857 decoded form, because it is most often used to construct To: headers
2858 lines in autoreplies, and the decoded form may well be syntactically
2859 invalid. However, $reply_address has leading white space removed, and all
2860 newlines turned into spaces so that the autoreply transport does not
2863 PH/05 If group was specified without a user on a router, and no group or user
2864 was specified on a transport, the group from the router was ignored.
2866 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2867 for visible compile-time settings that can be used to change these
2868 numbers, for those that want even more. Backwards compatibility with old
2869 spool files has been maintained. However, going back to a previous Exim
2870 release will lost any variables that are in spool files.
2872 PH/07 Two small changes when running in the test harness: increase delay when
2873 passing a TCP/IP connection to a new process, in case the original
2874 process has to generate a bounce, and remove special handling of
2875 127.0.0.2 (sic), which is no longer necessary.
2877 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2878 be the same on different OS.
2880 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2883 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2884 whether --show-vars was specified or not
2886 JJ/02 exipick: Added support for new ACL variable spool format introduced
2889 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2890 syntactically invalid From: or Reply-to: line, and a filter used this to
2891 generate an autoreply, and therefore failed to obtain an address for the
2892 autoreply, Exim could try to deliver to a non-existent relative file
2893 name, causing unrelated and misleading errors. What now happens is that
2894 it logs this as a hard delivery error, but does not attempt to create a
2897 PH/11 The exinext utility has a -C option for testing purposes, but although
2898 the given file was scanned by exinext itself; it wasn't being passed on
2899 when Exim was called.
2901 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2902 an end-of-file indication when reading a command response.
2904 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2905 compiled. In many other places in Exim, IPv6 addresses are always
2906 recognized, so I have changed this. It also means that IPv4 domain
2907 literals of the form [IPV4:n.n.n.n] are now always recognized.
2909 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2910 used if the router is not running as root, for example, when verifying at
2911 ACL time, or when using -bh. The debugging output from this situation was
2912 non-existent - all you got was a failure to exec. I have made two
2915 (a) Failures to set uid/gid, the current directory, or a process leader
2916 in a subprocess such as that created by queryprogram now generate
2917 suitable debugging output when -d is set.
2919 (b) The queryprogram router detects when it is not running as root,
2920 outputs suitable debugging information if -d is set, and then runs
2921 the subprocess without attempting to change uid/gid.
2923 PH/15 Minor change to Makefile for building test_host (undocumented testing
2926 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2927 additional section of a DNS packet that returns MX or SRV records.
2928 Instead, it always explicitly searches for A/AAAA records. This avoids
2929 major problems that occur when a DNS server includes only records of one
2930 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2931 fixed another bug: if SRV records were looked up and the corresponding
2932 address records were *not* found in the additional section, the port
2933 values from the SRV records were lost.
2935 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2936 using the correct key (the original address) when searching the retry
2937 rules in order to find which one to use for generating the retry hint.
2939 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2940 adding the default one. Similarly, if it contains a Reply-To: header, the
2941 errors_reply_to option, if set, is not used.
2943 PH/19 When calculating a retry time, Exim used to measure the "time since
2944 failure" by looking at the "first failed" field in the retry record. Now
2945 it does not use this if it is later than than the arrival time of the
2946 message. Instead it uses the arrival time. This makes for better
2947 behaviour in cases where some deliveries succeed, thus re-setting the
2948 "first failed" field. An example is a quota failure for a huge message
2949 when small messages continue to be delivered. Without this change, the
2950 "time since failure" will always be short, possible causing more frequent
2951 delivery attempts for the huge message than are intended.
2952 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2954 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2955 $1, $2, $3) because the numerical variables can be reset during some
2956 expansion items (e.g. "match"), thereby losing the authentication data.
2958 PH/21 Make -bV show the size of off_t variables so that the test suite can
2959 decide whether to run tests for quotas > 2G.
2961 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2962 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2963 filecount value is greater than 2G or if a quota value is greater than 2G
2964 on a system where the size of off_t is not greater than 4, a panic error
2967 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2968 never match. The debug and -bh output now contains an explicit error
2969 message indicating a malformed IPv4 address or mask.
2971 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2972 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2973 PH/23 above applies.
2975 PH/25 Do not write to syslog when running in the test harness. The only
2976 occasion when this arises is a failure to open the main or panic logs
2977 (for which there is an explicit test).
2979 PH/26 Added the /no_tell option to "control=freeze".
2981 PH/27 If a host name lookup failed very early in a connection, for example, if
2982 the IP address matched host_lookup and the reverse lookup yielded a name
2983 that did not have a forward lookup, an error message of the form "no IP
2984 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2985 could be logged. Now it outputs the IP address instead of "NULL".
2987 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2988 allows the sender and the authenticated sender to be set when
2989 submitting a message from within Exim. Since child_open_exim() is
2990 documented for local_scan(), the new function should be too.
2992 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2993 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2994 results in an empty string is now treated as unset.
2996 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2998 PH/31 Added sender_verify_fail logging option.
3000 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3001 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3002 tidied the source and removed it altogether.
3004 PH/33 When a queue run was abandoned because the load average was too high, a
3005 log line was always written; now it is written only if the queue_run log
3006 selector is set. In addition, the log line for abandonment now contains
3007 information about the queue run such as the pid. This is always present
3008 in "start" and "stop" lines but was omitted from the "abandon" line.
3010 PH/34 Omit spaces between a header name and the colon in the error message that
3011 is given when verify = headers_syntax fails (if there are lots of them,
3012 the message gets confusing).
3014 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3015 names, as there are now some PTR records that contain slashes. This check
3016 is only to protect against broken name servers that fall over on strange
3017 characters, so the fact that it applies to all lookups doesn't matter.
3019 PH/36 Now that the new test suite is complete, we can remove some of the
3020 special code in Exim that was needed for the old test suite. For example,
3021 sorting DNS records because real resolvers return them in an arbitrary
3022 order. The new test suite's fake resolver always returns records in the
3025 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3026 bounces) except when queue_only is set, to avoid logging races between
3027 the different processes.
3029 PH/38 Panic-die if .include specifies a non-absolute path.
3031 PH/39 A tweak to the "H" retry rule from its user.
3033 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3034 a label. They prevented compilation on older perls.
3036 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3037 a warning to be raised on newish perls.
3039 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3040 on queue. Changes to match documented behaviour of showing count of
3041 messages matching specified criteria.
3043 PH/40 Changed the default ident timeout from 30s to 5s.
3045 PH/41 Added support for the use of login_cap features, on those BSD systems
3046 that have them, for controlling the resources used by pipe deliveries.
3048 PH/42 The content-scanning code uses fopen() to create files in which to put
3049 message data. Previously it was not paying any attention to the mode of
3050 the files. Exim runs with umask(0) because the rest of the code creates
3051 files with open(), and sets the required mode explicitly. Thus, these
3052 files were ending up world-writeable. This was not a big issue, because,
3053 being within the spool directory, they were not world-accessible. I have
3054 created a function called modefopen, which takes an additional mode
3055 argument. It sets umask(777), creates the file, chmods it to the required
3056 mode, then resets the umask. All the relevant calls to fopen() in the
3057 content scanning code have been changed to use this function.
3059 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3060 to 24 hours. This avoids potential overflow problems when processing G
3061 and H retry rules. I suspect nobody ever tinkers with this value.
3063 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3065 PH/45 When the plaintext authenticator is running as a client, the server's
3066 challenges are checked to ensure they are valid base64 strings. By
3067 default, the authentication attempt is cancelled if an invalid string is
3068 received. Setting client_ignore_invalid_base64 true ignores these errors.
3069 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3070 they are received. Thus, the responses can be made to depend on the
3071 challenges. If an invalid string is ignored, an empty string is placed in
3074 PH/46 Messages that are created by the autoreply transport now contains a
3075 References: header, in accordance with RFCs 2822 and 3834.
3077 PH/47 Added authenticated_sender_force to the smtp transport.
3079 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3081 PH/49 Installed latest patch from the Sieve maintainer.
3083 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3084 was also set, the appendfile transport was unnecessarily scanning a
3085 directory of message files (e.g. for maildir delivery) to find the count
3086 of files (along with the size), even though it did not need this
3087 information. It now does the scan only if it needs to find either the
3088 size of the count of files.
3090 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3092 PH/52 Two bugs concerned with error handling when the smtp transport is
3095 (i) Exim was not creating retry information for temporary errors given
3096 for individual recipients after the DATA command when the smtp transport
3097 was used in LMTP mode. This meant that they could be retried too
3098 frequently, and not timed out correctly.
3100 (ii) Exim was setting the flag that allows error details to be returned
3101 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3102 recipients that were returned after the DATA command.
3104 PH/53 This is related to PH/52, but is more general: for any failing address,
3105 when detailed error information was permitted to be returned to the
3106 sender, but the error was temporary, then after the final timeout, only
3107 "retry timeout exceeded" was returned. Now it returns the full error as
3108 well as "retry timeout exceeded".
3110 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3111 do this, and (what is worse) MTAs that accept it.
3113 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3114 will now be deprecated.
3116 PH/56 New os.c-cygwin from the Cygwin maintainer.
3118 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3119 formats (previously only available in exim formats via -bpr, -bpru,
3120 and -bpra. Now also available in native and exiqgrep formats)
3122 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3123 with very large, slow to parse queues
3125 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3127 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3129 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3130 responses to authentication challenges, though it was showing the
3131 challenges; (ii) I've removed the CR characters from the debug output for
3134 PH/58 Allow for the insertion of a newline as well as a space when a string
3135 is turned into more than one encoded-word during RFC 2047 encoding. The
3136 Sieve code now uses this.
3138 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3139 data_4xx, lost_connection, tls_required.
3141 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3142 message was being sent as an SMTP response.
3144 PH/61 Add -l and -k options to exicyclog.
3146 PH/62 When verifying, if an address was redirected to one new address, so that
3147 verification continued, and the new address failed or deferred after
3148 having set something in $address_data, the value of $address_data was not
3149 passed back to the ACL. This was different to the case when no
3150 redirection occurred. The value is now passed back in both cases.
3152 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3153 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3154 use login_cap.h, so on its own it isn't the distinguishing feature. The
3155 new name refers directly to the setclassresources() function.
3157 PH/65 Added configuration files for NetBSD3.
3159 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3161 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3162 is preferred over IPv4.
3164 PH/68 The bounce_return_message and bounce_return_body options were not being
3165 honoured for bounces generated during the reception of non-SMTP messages.
3166 In particular, this applied to messages rejected by the ACL. This bug has
3167 been fixed. However, if bounce_return_message is true and bounce_return_
3168 body is false, the headers that are returned for a non-SMTP message
3169 include only those that have been read before the error was detected.
3170 (In the case of an ACL rejection, they have all been read.)
3172 PH/69 The HTML version of the specification is now built in a directory called
3173 spec_html instead of spec.html, because the latter looks like a path with
3174 a MIME-type, and this confuses some software.
3176 PH/70 Catch two compiler warnings in sieve.c.
3178 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3179 function verify_get_ident() calls ip_connect() to connect a socket, but
3180 if the "connect()" function timed out, ip_connect() used to close the
3181 socket. However, verify_get_ident() also closes the socket later, and in
3182 between Exim writes to the log, which may get opened at this point. When
3183 the socket was closed in ip_connect(), the log could get the same file
3184 descriptor number as the socket. This naturally causes chaos. The fix is
3185 not to close the socket in ip_connect(); the socket should be closed by
3186 the function that creates it. There was only one place in the code where
3187 this was missing, in the iplookup router, which I don't think anybody now
3188 uses, but I've fixed it anyway.
3190 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3191 well as to direct DNS lookups. Otherwise the handling of names in host
3192 lists is inconsistent and therefore confusing.
3198 PH/01 Two changes to the default runtime configuration:
3200 (1) Move the checks for relay_from_hosts and authenticated clients from
3201 after to before the (commented out) DNS black list checks.
3203 (2) Add control=submission to the relay_from_hosts and authenticated
3204 clients checks, on the grounds that messages accepted by these
3205 statements are most likely to be submissions.
3207 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3209 (1) Generate an error if the third argument for the ${prvs expansion is
3212 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3215 (3) Reset the variables that are obtained from the first argument of
3216 ${prvscheck and used in the second argument before leaving the code,
3217 because their memory is reclaimed, so using them afterwards may do
3220 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3221 one (it's much easier than Tom thought :-).
3223 (5) Because of (4), we can now allow for the use of $prvscheck_result
3224 inside the third argument.
3226 PH/03 For some reason, the default setting of PATH when running a command from
3227 a pipe transport was just "/usr/bin". I have changed it to
3230 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3231 anything to be listed in the output from -bV.
3233 PH/05 When a filter generated an autoreply, the entire To: header line was
3234 quoted in the delivery log line, like this:
3236 => >A.N.Other <ano@some.domain> <original@ddress> ...
3238 This has been changed so that it extracts the operative address. There
3239 may be more than one such address. If so, they are comma-separated, like
3242 => >ano@some.domain,ona@other.domain <original@ddress> ...
3244 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3245 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3246 not being looked up in the rDNS to get a host name, Exim was showing the
3247 IP address twice in Received: lines, even though the IP addresses were
3248 identical. For example:
3250 Received: from [1.2.3.4] (helo=[1.2.3.4])
3252 However, if the real host name was known, it was omitting the HELO data
3253 if it matched the actual IP address. This has been tidied up so that it
3254 doesn't show the same IP address twice.
3256 PH/07 When both +timestamp and +memory debugging was on, the value given by
3257 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3258 called by the debug printing, thereby overwriting the timestamp buffer.
3259 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3261 PH/08 When the original message was included in an autoreply transport, it
3262 always said "this is a copy of the message, including all the headers",
3263 even if body_only or headers_only was set. It now gives an appropriate
3266 PH/09 Applied a patch from the Sieve maintainer which:
3268 o fixes some comments
3269 o adds the (disabled) notify extension core
3270 o adds some debug output for the result of if/elsif tests
3271 o points to the current vacation draft in the documentation
3272 and documents the missing references header update
3276 o fixes a bug in processing the envelope test (when testing
3277 multiple envelope elements, the last element determined the
3280 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3281 Electronic Mail") by including:
3283 Auto-submitted: auto-generated
3285 in the messages that it generates (bounce messages and others, such as
3286 warnings). In the case of bounce messages for non-SMTP messages, there was
3287 also a typo: it was using "Auto_submitted" (underscore instead of
3288 hyphen). Since every message generated by Exim is necessarily in response
3289 to another message, thes have all been changed to:
3291 Auto-Submitted: auto-replied
3293 in accordance with these statements in the RFC:
3295 The auto-replied keyword:
3297 - SHOULD be used on messages sent in direct response to another
3298 message by an automatic process,
3300 - MUST NOT be used on manually-generated messages,
3302 - MAY be used on Delivery Status Notifications (DSNs) and Message
3303 Disposition Notifications (MDNs),
3305 - MUST NOT be used on messages generated by automatic or periodic
3306 processes, except for messages which are automatic responses to
3309 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3310 to the default Received: header definition.
3312 PH/12 Added log selector acl_warn_skipped (default on).
3314 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3315 variables because (a) they are in the wrong storage pool and (b) even if
3316 they were copied, it wouldn't work properly because of the caching.
3318 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3319 checking when decoding. Apparently there are clients that generate
3320 overlong encoded strings. Why am I not surprised?
3322 PH/15 If the first argument of "${if match_address" was not empty, but did not
3323 contain an "@" character, Exim crashed. Now it writes a panic log message
3324 and treats the condition as false.
3326 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3328 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3329 extension "envelope-auth". The code is finished and in agreement with
3330 other implementations, but there is no documentation so far and in fact,
3331 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3332 not changing the active code.
3334 Print executed "if" and "elsif" statements when debugging is used. This
3335 helps a great deal to understand what a filter does.
3337 Document more things not specified clearly in RFC3028. I had all this
3338 sorted out, when out of a sudden new issues came to my mind. Oops."
3340 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3343 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3344 canonical form (as documented). However, after a host name lookup from
3345 the IP address, check_host() was doing a simple string comparison with
3346 addresses acquired from the DNS when checking that the found name did
3347 have the original IP as one of its addresses. Since any found IPv6
3348 addresses are likely to be in abbreviated form, the comparison could
3349 fail. Luckily, there already exists a function for doing the comparison
3350 by converting both addresses to binary, so now that is used instead of
3351 the text comparison.
3353 PH/20 There was another similar case to PH/19, when a complete host name was
3354 given in a host list; looking up its IP address could give an abbreviated
3355 form, whereas the current host's name might or might not be abbreviated.
3356 The same fix has been applied.
3362 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3363 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3366 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3367 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3369 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3371 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3372 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3373 Also, for "Auto-Submitted", treat anything other than "no" as
3374 non-personal, in accordance with RFC 3834. (Previously it treated
3375 anything starting "auto-" as non-personal.)
3377 TF/01 The control=submission/name=... option had a problem with syntax
3378 errors if the name included a slash character. The /name= option
3379 now slurps the rest of the string, so it can include any characters
3380 but it must come last in the list of options (after /sender_retain
3383 PH/05 Some modifications to the interface to the fake nameserver for the new
3391 TK/01 Added the "success_on_redirect" address verification option. See
3392 NewStuff for rationale and an example.
3394 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3396 PH/02 Patch to exigrep to allow it to work on syslog lines.
3398 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3399 fread() to skip over the body file's header line, because in Cygwin the
3400 header line is locked and is inaccessible.
3402 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3403 co-exist for some time) to make it clear that it is the Exim ID that is
3404 referenced, not the Message-ID: header line.
3406 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3407 string_format() function, because snprintf() does not exist on all
3410 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3411 ${stat: expansion item.
3413 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3414 protocol synchronization error", to keep the pedants happy.
3416 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3417 well as for IRIX systems, when gcc is being used. See the host.c source
3420 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3422 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3425 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3426 transport and to the smtp transport in LMTP mode.
3428 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3430 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3431 run a filter in a subprocess. This could lead to confusion in subsequent
3432 lookups in the parent process. There should also be a search_tidyup() at
3433 the end of the subprocess.
3435 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3436 only if the host matched helo_try_verify_hosts, which caused the
3437 verification to occur when the EHLO/HELO command was issued. The ACL just
3438 tested the remembered result. Now, if a previous verification attempt has
3439 not happened, "verify = helo" does it there and then.
3441 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3443 TK/03 Fix log output including CR from clamd.
3445 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3446 exist provoked a memory error which could cause a segfault.
3448 PH/15 Installed PCRE 6.2
3450 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3452 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3453 of the problem. Specifically, suggested +O2 rather than +O1 for the
3456 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3458 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3459 record, the port was not correctly logged when the outgoing_port log
3460 selector was set (it logged the transort's default port).
3462 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3463 fallback_hosts, and "hosts" in the smtp transport.
3465 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3466 host errors such as "Connection refused".
3468 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3469 authentication with radiusclient 0.4.9:
3471 - Error returned from rc_read_config was caught wrongly
3472 - Username/password not passed on to radius server due to wrong length.
3474 The presumption is that some radiusclient API changes for 4.51/PH/17
3475 were not taken care of correctly. The code is still untested by me (my
3476 Linux distribution still has 0.3.2 of radiusclient), but it was
3477 contributed by a Radius user.
3479 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3480 expanding the "port" option of the smtp transport.
3482 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3483 while reading a MIME header. Thanks to Tom Hughes for a patch.
3485 PH/24 Include config.h inside local_scan.h so that configuration settings are
3488 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3489 that in an ACL for RCPT (for example), you can examine exactly what was
3492 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3493 commands, but it was not correctly comparing the address with the actual
3494 client host address. Thus, it would show the EHLO address in Received:
3495 header lines when this was not necessary.
3497 PH/27 Added the % operator to ${eval:}.
3499 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3500 it should be ignoring failures (because with -C, for example, it has lost
3501 privilege). It wasn't ignoring creation failures other than "already
3504 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3507 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3508 because an input line was too long, either on its own, or by virtue of
3509 too many continuations, the temporary file was not being removed, and the
3510 return code was incorrect.
3512 PH/31 Missing "BOOL" in function definition in filtertest.c.
3514 PH/32 Applied Sieve patches from the maintainer.
3516 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3518 PH/33 Added "verify = not_blind".
3520 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3521 Local/Makefile (with some defaults set). These are used in built scripts
3522 such as exicyclog, but they have never been used in the exim_install
3523 script (though there are many overriding facilities there). I have
3524 arranged that the exim_install script now takes note of these two
3527 PH/35 Installed configuration files for Dragonfly.
3529 PH/36 When a locally submitted message by a trusted user did not contain a
3530 From: header, and the sender address was obtained from -f or from an SMTP
3531 MAIL command, and the trusted user did not use -F to supply a sender
3532 name, $originator_name was incorrectly used when constructing a From:
3533 header. Furthermore, $originator_name was used for submission mode
3534 messages from external hosts without From: headers in a similar way,
3535 which is clearly wrong.
3537 PH/37 Added control=suppress_local_fixups.
3539 PH/38 When log_selector = +received_sender was set, and the addition of the
3540 sender made the log line's construction buffer exactly full, or one byte
3541 less than full, an overflow happened when the terminating "\n" was
3544 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3545 when the result of a list match is failure because a DNS lookup failed.
3547 PH/40 RM_COMMAND is now used in the building process.
3549 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3550 the "build-* directories that it finds.
3552 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3553 address in a domain literal was a prefix of an interface address.
3555 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3556 when verifying a sender address, unless rewrite_headers is false.
3558 PH/44 Wrote a long comment about why errors_to addresses are verified as
3559 recipients, not senders.
3561 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3562 the ratelimit ACL was added.
3564 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3566 PH/46 Added extra information about PostgreSQL errors to the error string.
3568 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3569 avoiding the need to install special zones in a real server. This is
3570 backwards compatible; if it can't find the fake resolver, it drops back.
3571 Thus, both old and new test suites can be run.
3573 TF/02 Added util/ratelimit.pl
3575 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3576 clock is set back in time.
3578 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3579 Candler <B.Candler@pobox.com>.
3581 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3582 OK for addresses that are the result of redirections.
3584 PH/48 A number of further additions for the benefit of the new test suite,
3585 including a fake gethostbyname() that interfaces to the fake DNS resolver
3588 TF/06 The fix for widen_domains has also been applied to qualify_single and
3589 search_parents which are the other dnslookup options that can cause
3592 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3595 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3597 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3598 service" if it encountered an MX record with an empty target hostname.
3599 The message is now "an MX or SRV record indicated no SMTP service".
3601 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3602 if the DNS of the sending site is misconfigured. This is quite a
3603 common situation. This change restores the behaviour of treating a
3604 helo verification defer as a failure.
3606 PH/51 If self=fail was set on a router, the bounce message did not include the
3607 actual error message.
3613 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3615 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3616 command itself ended in error, the underlying message about the transport
3617 filter timeout was being overwritten with the pipe command error. Now the
3618 underlying error message should be appended to the second error message.
3620 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3622 PH/02 Reduce the amount of output that "make" produces by default. Full output
3623 can still be requested.
3625 PH/03 The warning log line about a condition test deferring for a "warn" verb
3626 was being output only once per connection, rather than after each
3627 occurrence (because it was using the same function as for successful
3628 "warn" verbs). This seems wrong, so I have changed it.
3630 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3631 it should not have, which might have caused a crash in the right
3632 circumstances, but probably never did.
3634 PH/04 Installed a modified version of Tony Finch's patch to make submission
3635 mode fix the return path as well as the Sender: header line, and to
3636 add a /name= option so that you can make the user's friendly name appear
3639 TF/03 Added the control = fakedefer ACL modifier.
3641 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3642 Mark Lowes for thorough testing.
3644 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3646 TK/03 Merged latest SRS patch from Miles Wilton.
3648 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3649 with the definition in sysexits.h (which is #included earlier).
3650 Fortunately, Exim does not actually use EX_OK. The code used to try to
3651 preserve the sysexits.h value, by assuming that macro definitions were
3652 scanned for macro replacements. I have been disabused of this notion,
3653 so now the code just undefines EX_OK before #including unistd.h.
3655 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3656 in the smtp transport. When a block could not be written in a single
3657 write() function, the timeout was being re-applied to each part-write.
3658 This seems wrong - if the receiver was accepting one byte at a time it
3659 would take for ever. The timeout is now adjusted when this happens. It
3660 doesn't have to be particularly precise.
3662 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3663 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3665 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3666 without a domain if the check to <postmaster@domain> fails.
3668 SC/01 Eximstats: added -xls and the ability to specify output files
3669 (patch written by Frank Heydlauf).
3671 SC/02 Eximstats: use FileHandles for outputting results.
3673 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3675 SC/04 Eximstats: fixed display of large numbers with -nvr option
3677 SC/05 Eximstats: fixed merging of reports with empty tables.
3679 SC/06 Eximstats: added the -include_original_destination flag
3681 SC/07 Eximstats: removed tabs and trailing whitespace.
3683 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3685 TK/06 MBOX spool code: Add real "From " MBOX separator line
3686 so the .eml file is really in mbox format (even though
3687 most programs do not really care). Patch from Alex Miller.
3689 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3690 The latter is generated from $received_to and is only set if the
3691 message has one envelope recipient. SA can use these headers,
3692 obviously out-of-the-box. Patch from Alex Miller.
3694 PH/08 The ${def test on a variable was returning false if the variable's
3695 value was "0", contrary to what the specification has always said!
3696 The result should be true unless the variable is empty.
3698 PH/09 The syntax error of a character other than { following "${if
3699 def:variable_name" (after optional whitespace) was not being diagnosed.
3700 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3701 accidental colon was present, for example, could give incorrect results.
3703 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3704 result is used (not including appendfile, where other changes are about
3707 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3708 This involved changing a lot of size variables from int to off_t. It
3709 should work with maildirs and everything.
3711 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3712 spamd dying while we are connected to it.
3714 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3717 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3718 function for BDB 4.3.
3720 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3722 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3723 the sources for PCRE have been re-arranged and more files are now
3726 PH/15 The code I had for printing potentially long long variables in PH/11
3727 above was not the best (it lost precision). The length of off_t variables
3728 is now inspected at build time, and an appropriate printing format (%ld
3729 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3730 to be "long long int" or "long int". This is needed for the internal
3731 formatting function string_vformat().
3733 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3734 the configuration file to be ":syslog", then the script "guesses" where
3735 the logs files are, rather than using the compiled in default. In our
3736 case the guess is not the same as the compiled default, so the script
3737 suddenly stopped working when I started to use syslog. The patch checks
3738 to see if log_file_path is "". If so, it attempts to read it from exim
3739 with no configuration file to get the compiled in version, before it
3740 falls back to the previous guessing code."
3742 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3743 implementing BATV in an Exim configuration. See NewStuff for the gory
3746 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3747 Makefile that are specific to HP-UX.
3749 PH/18 If the "use_postmaster" option was set for a recipient callout together
3750 with the "random" option, the postmaster address was used as the MAIL
3751 FROM address for the random test, but not for the subsequent recipient
3752 test. It is now used for both.
3754 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3755 patch removes a few documentation additions to RFC 3028, because the
3756 latest draft now contains them. It adds the new en;ascii-case comparator
3757 and a new error check for 8bit text in MIME parts. Comparator and
3758 require names are now matched exactly. I enabled the subaddress
3759 extension, but it is not well tested yet (read: it works for me)."
3761 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3762 rework some of the code of TK/09 above to avoid the hardwired use of
3763 "%lld" and "long long". Replaced the call to snprintf() with a call to
3766 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3767 records point to non-existent hosts", "retry timeout exceeded", and
3768 "retry time not reached for any host after a long failure period".
3770 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3771 experimental DomainKeys support:
3773 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3774 (2) On an error such as an illegally used "control", the wrong name for
3775 the control was given.
3777 These problems did NOT occur unless DomainKeys support was compiled.
3779 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3781 PH/24 Added ${if match_ip condition.
3783 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3784 databases so that it will be absolutely obvious if a crash occurs in the
3785 DB library. This is a regular occurrence (often caused by mis-matched
3788 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3789 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3790 picked up on a user's system that detects such things. There doesn't seem
3791 to be a gcc warning option for this - only an attribute that has to be
3792 put on the function's prototype. It seems that in Fedora Core 4 they have
3793 set this on a number of new functions. No doubt there will be more in due
3796 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3797 specify a transport. However, if an address that was verified by such a
3798 router was the subject of a callout, Exim crashed because it tried to
3799 read the rcpt_include_affixes from the non-existent transport. Now it
3800 just assumes that the setting of that option is false. This bug was
3801 introduced by 4.51/PH/31.
3803 PH/28 Changed -d+all to exclude +memory, because that information is very
3804 rarely of interest, but it makes the output a lot bigger. People tend to
3805 do -d+all out of habit.
3807 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3808 code in os-type was giving problems when libc.so lives in lib64, like on
3811 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3812 aren't the modern standard, and it seems that some systems' include files
3813 don't always have them. Exim was already checking for some of the newer
3814 ones like T_AAAA, and defining it itself. I've added checks for all the
3815 record types that Exim uses.
3817 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3818 not automatically generating a new one, as it is supposed to. This
3819 prevented TLS from working. If the file did exist, but contained invalid
3820 data, a new version was generated, as expected. It was only the case of a
3821 non-existent file that was broken.
3823 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3824 with a change in libdomainkeys > 0.64.
3826 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3827 from DNS. If the selector record carries the flag, it now has
3828 precedence over the domain-wide flag.
3830 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3832 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3833 the use of a port name that isn't defined in /etc/services) occurred, the
3834 message was deferred as in a normal delivery, and thus remained on the
3835 spool, instead of being failed because of the mua_wrapper setting. This
3836 is now fixed, and I tidied up some of the mua_wrapper messages at the
3839 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3840 the messages in a hash of arrays rather than using individual hashes.
3841 This is a bit cleaner and results in dramatic memory savings, albeit
3842 at a slight CPU cost.
3844 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3845 as requested by Marc Sherman.
3847 SC/10 Eximstats: added histograms for user specified patterns as requested
3850 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3852 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3853 fopen() in the content-scanning modules that did not already have it.
3859 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3860 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3862 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3864 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3866 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3867 to test Sieve filters that use "vacation".
3869 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3870 that changes the way the GnuTLS parameters are stored in the cache file.
3871 The new format can be generated externally. For backward compatibility,
3872 if the data in the cache doesn't make sense, Exim assumes it has read an
3873 old-format file, and it generates new data and writes a new file. This
3874 means that you can't go back to an older release without removing the
3877 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3878 work if there are any delivery delays because "one_time" forces the
3879 parent to be marked "delivered", so its unseen clone is never tried
3880 again. For this reason, Exim now forbids the simultaneous setting of
3883 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3884 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3885 entry if you want to know the details. The fix, however, neglected to
3886 consider the case when local delivery batching is involved. The test for
3887 "previously delivered" was not happening when checking to see if an
3888 address could be batched with a previous (undelivered) one; under
3889 certain circumstances this could lead to multiple deliveries to the same
3892 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3893 in its include files, and this causes problems building Exim.
3895 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3896 header_syntax) but Exim was just ignoring anything given after a slash.
3897 In particular, this caused confusion with an attempt to use "verify =
3898 reverse_host_lookup/defer_ok". An error is now given when options are
3899 supplied for verify items that do not have them. (Maybe reverse_host_
3900 lookup should have a defer_ok option, but that's a different point.)
3902 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3903 defined by RFC 821) to 2048, because there were problems with some AUTH
3904 commands, and RFC 1869 says the size should be increased for extended
3905 SMTP commands that take arguments.
3907 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3910 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3911 "unknown" error; now it says that the functionality isn't in the binary.
3913 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3914 an address' error message when a string expansion fails (syntax or
3915 whatever). Otherwise the password may appear in the log. Following change
3916 PH/42 below, there is no longer a chance of it appearing in a bounce
3919 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3921 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3922 of its addresses was ever tried. (Bugzilla bug #2.)
3924 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3925 the result incorrectly in the debug output. (It correctly added a newline
3926 to what was transported.)
3928 TF/01 Added $received_time.
3930 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3931 commented out examples of how to interface to a virus scanner and to
3932 SpamAssassin. Also added commented examples of av_scanner and
3933 spamd_address settings.
3935 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3936 and controls are allowed in which ACLs. There were a couple of minor
3937 errors. Some of the entries in the conditions table (which is a table of
3938 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3939 negation of where the condition IS allowed.
3941 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3943 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3944 header file does not have a version number, so I've had to invent a new
3945 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3946 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3947 radiusclient), but it was contributed by a Radius user.
3949 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3950 files or directories, for OpenSSL.
3952 PH/19 When an Exim process that is running as root has to create an Exim log
3953 file, it does so in a subprocess that runs as exim:exim so as to get the
3954 ownership right at creation (otherwise, other Exim processes might see
3955 the file with the wrong ownership). There was no test for failure of this
3956 fork() call, which would lead to the process getting stuck as it waited
3957 for a non-existent subprocess. Forks do occasionally fail when resources
3958 run out. I reviewed all the other calls to fork(); they all seem to check
3961 PH/20 When checking for unexpected SMTP input at connect time (before writing
3962 the banner), Exim was not dealing correctly with a non-positive return
3963 from the read() function. If the client had disconnected by this time,
3964 the result was a log entry for a synchronization error with an empty
3965 string after "input=" when read() returned zero. If read() returned -1
3966 (an event I could not check), uninitialized data bytes were printed.
3967 There were reports of junk text (parts of files, etc) appearing after
3970 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3972 PH/22 Added support for macro redefinition, and (re)definition in between
3973 driver and ACL definitions.
3975 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3976 forgetting to use the resulting value; it was using the unexpanded value.
3978 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3979 hadn't been configured. The fix is from Juergen Kreileder, who
3980 understands it better than I do:
3982 "Here's what I see happening with three configured cyrus_sasl
3983 authenticators configured (plain, login, cram-md5):
3985 On startup auth_cyrus_sasl_init() gets called for each of these.
3986 This means three calls to sasl_listmech() without a specified mech_list.
3987 => SASL tests which mechs of all available mechs actually work
3988 => three warnings about OTP not working
3989 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3991 With the patch, sasl_listmech() also gets called three times. But now
3992 SASL's mech_list option is set to the server_mech specified in the the
3993 authenticator. Or in other words, the answer from sasl_listmech()
3994 gets limited to just the mech you're testing for (which is different
3996 => the return list contains just 'plain' or 'login', 'cram-md5' or
3997 nothing depending on the value of ob->server_mech.
3999 I've just tested the patch: Authentication still works fine,
4000 unavailable mechs specified in the exim configuration are still
4001 caught, and the auth.log warnings about OTP are gone."
4003 PH/25 When debugging is enabled, the contents of the command line are added
4004 to the debugging output, even when log_selector=+arguments is not
4007 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4008 answer is "GNU", and only if the return is "GNU/something" is the answer
4011 PH/27 $acl_verify_message is now set immediately after the failure of a
4012 verification in an ACL, and so is available in subsequent modifiers. In
4013 particular, the message can be preserved by coding like this:
4015 warn !verify = sender
4016 set acl_m0 = $acl_verify_message
4018 Previously, $acl_verify_message was set only while expanding "message"
4019 and "log_message" when a very denied access.
4021 PH/28 Modified OS/os.c-Linux with
4023 -#ifndef OS_LOAD_AVERAGE
4024 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4026 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4027 nomenclature these days.)
4029 PH/29 Installed patch from the Sieve maintainer that adds the options
4030 sieve_useraddress and sieve_subaddress to the redirect router.
4032 PH/30 In these circumstances:
4033 . Two addresses routed to the same list of hosts;
4034 . First host does not offer TLS;
4035 . First host accepts first address;
4036 . First host gives temporary error to second address;
4037 . Second host offers TLS and a TLS session is established;
4038 . Second host accepts second address.
4039 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4040 and peerdn, if requested) that were in fact used only for the second
4043 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4044 attention to any local part prefix or suffix that was matched by the
4045 router that accepted the address. It now behaves in the same way as it
4046 does for delivery: the affixes are removed from the local part unless
4047 rcpt_include_affixes is set on the transport.
4049 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4050 timeout during the DATA phase of an incoming message.
4052 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4053 applied a patch sanctioned by the Sieve maintainer.
4055 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4056 the uid or gid is negative. A case of a negative gid caused this to be
4057 noticed. The fix allows for either to be negative.
4059 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4060 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4063 PH/36 The change PH/12 above was broken. Fixed it.
4065 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4066 the grounds that routing the same address twice would always produce the
4067 same answer. This might have been true once, but it is certainly no
4068 longer true now. Routing a child address may depend on the previous
4069 routing that produced that child. Some complicated redirection strategies
4070 went wrong when messages had multiple recipients, and made Exim's
4071 behaviour dependent on the order in which the addresses were given.
4073 I have moved the duplicate checking until after the routing is complete.
4074 Exim scans the addresses that are assigned to local and remote
4075 transports, and removes any duplicates. This means that more work will be
4076 done, as duplicates will always all be routed, but duplicates are
4077 presumably rare, so I don't expect this is of any significance.
4079 For deliveries to pipes, files, and autoreplies, the duplicate checking
4080 still happens during the routing process, since they are not going to be
4083 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4084 It corrects a timeout issue with spamd. This is Ian's comment: "The
4085 background is that sometimes spamd either never reads data from a
4086 connection it has accepted, or it never writes response data. The exiscan
4087 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4088 blindly assumes that writes won't block so it may never time out."
4090 PH/39 Allow G after quota size as well as K and M.
4092 PH/40 The value set for $authenticated_id in an authenticator may not contain
4093 binary zeroes or newlines because the value is written to log lines and
4094 to spool files. There was no check on this. Now the value is run through
4095 the string_printing() function so that such characters are converted to
4096 printable escape sequences.
4098 PH/41 $message_linecount is a new variable that contains the total number of
4099 lines in the message. Compare $body_linecount, which is the count for the
4102 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4103 bounce and delay warning messages, except in certain special cases, which
4106 (a) An SMTP error message from a remote host;
4107 (b) A message specified in a :fail: redirection;
4108 (c) A message specified in a "fail" command in a system filter;
4109 (d) A message specified in a FAIL return from the queryprogram router;
4110 (e) A message specified by the cannot_route_message router option.
4112 In these cases only, Exim does include the error details in bounce and
4113 warning messages. There are also a few cases where bland messages such
4114 as "unrouteable address" or "local delivery error" are given.
4116 PH/43 $value is now also set for the "else" part of a ${run expansion.
4118 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4119 being worked on, but at least Exim now implements the latest version to
4122 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4123 process to complete was treated as a delivery failure, a timeout while
4124 writing the message to the pipe was logged, but erroneously treated as a
4125 successful delivery. Such timeouts include transport filter timeouts. For
4126 consistency with the overall process timeout, these timeouts are now
4127 treated as errors, giving rise to delivery failures by default. However,
4128 there is now a new Boolean option for the pipe transport called
4129 timeout_defer, which, if set TRUE, converts the failures into defers for
4130 both kinds of timeout. A transport filter timeout is now identified in
4133 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4134 systems where "make" and "gmake" are different, calling "gmake" at top
4135 level broke things. I've arranged for the value of $(MAKE) to be passed
4136 from the Makefile to this script so that it can call the same version of
4140 A note about Exim versions 4.44 and 4.50
4141 ----------------------------------------
4143 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4144 changes of various kinds. As a consequence, a big documentation update was
4145 needed. This delayed the release for rather longer than seemed good, especially
4146 in the light of a couple of (minor) security issues. Therefore, the changes
4147 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4148 release. So 4.44 and 4.50 are in effect two different branches that both start
4151 I have left the 4.50 change log unchanged; it contains all the changes since
4152 4.43. The change log for 4.44 is below; many of its items are identical to
4153 those for 4.50. This seems to be the most sensible way to preserve the
4154 historical information.
4160 1. Minor wording change to the doc/README.SIEVE file.
4162 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4163 computation of the current number of files was incorrect.
4165 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4166 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4169 4. Give more explanation in the error message when the command for a transport
4170 filter fails to execute.
4172 5. There are several places where Exim runs a non-Exim command in a
4173 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4174 was being done only for the command run by the queryprogram router. It is
4175 now done for all such subprocesses. The other cases are: ${run, transport
4176 filters, and the commands run by the lmtp and pipe transports.
4178 6. Added CONFIGURE_GROUP build-time option.
4180 7. Some older OS have a limit of 256 on the maximum number of file
4181 descriptors. Exim was using setrlimit() to set 1000 as a large value
4182 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4183 systems. I've change it so that if it can't get 1000, it tries for 256.
4185 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4186 was an oversight, and furthermore, ever since the addition of extra
4187 controls (e.g. 4.43/32), the checks on when to allow different forms of
4188 "control" were broken. There should now be diagnostics for all cases when a
4189 control that does not make sense is encountered.
4191 9. Added the /retain_sender option to "control=submission".
4193 10. $recipients is now available in the predata ACL (oversight).
4195 11. Tidy the search cache before the fork to do a delivery from a message
4196 received from the command line. Otherwise the child will trigger a lookup
4197 failure and thereby defer the delivery if it tries to use (for example) a
4198 cached ldap connection that the parent has called unbind on.
4200 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4201 of $address_data from the recipient verification was clobbered by the
4202 sender verification.
4204 13. The value of address_data from a sender verification is now available in
4205 $sender_address_data in subsequent conditions in the ACL statement.
4207 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4209 15. Added a new option "connect=<time>" to callout options, to set a different
4212 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4213 was its contents. (It was OK if the option was not defined at all.)
4215 17. A "Completed" log line is now written for messages that are removed from
4216 the spool by the -Mrm option.
4218 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4219 information about exactly what failed.
4221 19. Added -dd to debug only the daemon process.
4223 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4224 handles timeouts, both on the server side and network timeouts. Renamed the
4225 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4227 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4228 It is now set to "smtps".
4230 22. $host_address is now set to the target address during the checking of
4231 ignore_target_hosts.
4233 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4234 being passed; this would have caused $sender_host_name to have been used if
4235 matching the list had actually called for a host name (not very likely,
4236 since this list is usually IP addresses). A host name is now passed as
4239 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4240 code that specifies a non-restarting handler (typically sigaction() in
4241 modern systems) in an attempt to fix a rare and obscure crash bug.
4243 25. Narrowed the window for a race in the daemon that could cause it to ignore
4244 SIGCHLD signals. This is not a major problem, because they are used only to
4245 wake it up if nothing else does.
4247 26. A malformed maildirsize file could cause Exim to calculate negative values
4248 for the mailbox size or file count. Odd effects could occur as a result.
4249 The maildirsize information is now recalculated if the size or filecount
4252 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4253 support for a long time. Removed HAVE_SYS_VFS_H.
4255 28. Installed the latest version of exipick from John Jetmore.
4257 29. In an address list, if the pattern was not a regular expression, an empty
4258 subject address (from a bounce message) matched only if the pattern was an
4259 empty string. Non-empty patterns were not even tested. This was the wrong
4260 because it is perfectly reasonable to use an empty address as part of a
4261 database query. An empty address is now tested by patterns that are
4262 lookups. However, all the other forms of pattern expect the subject to
4263 contain a local part and a domain, and therefore, for them, an empty
4264 address still always fails if the pattern is not itself empty.
4266 30. Exim went into a mad DNS loop when attempting to do a callout where the
4267 host was specified on an smtp transport, and looking it up yielded more
4268 than one IP address.
4270 31. Re-factored the code for checking spool and log partition space into a
4271 function that finds that data and another that does the check. The former
4272 is then used to implement four new variables: $spool_space, $log_space,
4273 $spool_inodes, and $log_inodes.
4275 32. The RFC2047 encoding function was originally intended for short strings
4276 such as real names; it was not keeping to the 75-character limit for
4277 encoded words that the RFC imposes. It now respects the limit, and
4278 generates multiple encoded words if necessary. To be on the safe side, I
4279 have increased the buffer size for the ${rfc2047: expansion operator from
4282 33. It is now permitted to omit both strings after an "if" condition; if the
4283 condition is true, the result is "true". As before, when the second string
4284 is omitted, a false condition yields an empty string. This makes it less
4285 cumbersome to write custom ACL and router conditions.
4287 34. Failure to deliver a bounce message always caused it to be frozen, even if
4288 there was an errors_to setting on the router. The errors_to setting is now
4291 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4292 canonical form (fully expanded) before being placed in
4293 $sender_host_address.
4295 36. The table in the code that translates DNS record types into text (T_A to
4296 "A" for instance) was missing entries for NS and CNAME. It is just possible
4297 that this could have caused confusion if both these types were looked up
4298 for the same domain, because the text type is used as part of Exim's
4299 per-process caching. But the chance of anyone hitting this buglet seems
4302 37. The dnsdb lookup has been extended in a number of ways.
4304 (1) There is a new type, "zns", which walks up the domain tree until it
4305 finds some nameserver records. It should be used with care.
4307 (2) There is a new type, "mxh", which is like "mx" except that it returns
4308 just the host names, not the priorities.
4310 (3) It is now possible to give a list of domains (or IP addresses) to be
4311 looked up. The behaviour when one of the lookups defers can be
4312 controlled by a keyword.
4314 (4) It is now possible to specify the separator character for use when
4315 multiple records are returned.
4317 38. The dnslists ACL condition has been extended: it is now possible to supply
4318 a list of IP addresses and/or domains to be looked up in a particular DNS
4321 39. Added log_selector=+queue_time_overall.
4323 40. When running the queue in the test harness, wait just a tad after forking a
4324 delivery process, to get repeatability of debugging output.
4326 41. Include certificate and key file names in error message when GnuTLS fails
4327 to set them up, because the GnuTLS error message doesn't include the name
4328 of the failing file when there is a problem reading it.
4330 42. Allow both -bf and -bF in the same test run.
4332 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4334 44. The "Exiscan patch" is now merged into the mainline Exim source.
4336 45. Sometimes the final signoff response after QUIT could fail to get
4337 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4338 < 0 before doing a fflush(). This bug looks as though it goes back to the
4339 introduction of TLS in release 3.20, but "sometimes" must have been rare
4340 because the tests only now provoked it.
4342 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4343 (this can affect the format of dates).
4345 47. exim_tidydb, when checking for the continued existence of a message for
4346 which it has found a message-specific retry record, was not finding
4347 messages that were in split spool directories. Consequently, it was
4348 deleting retry records that should have stayed in existence.
4350 48. Steve fixed some bugs in eximstats.
4352 49. The SPA authentication driver was not abandoning authentication and moving
4353 on to the next authenticator when an expansion was forced to fail,
4354 contradicting the general specification for all authenticators. Instead it
4355 was generating a temporary error. It now behaves as specified.
4357 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4358 (the order specifies the preference for clients). The order is now AES256,
4359 AES128, 3DES, ARCFOUR128.
4361 51. Small patch to Sieve code - explicitly set From: when generating an
4364 52. Exim crashed if a remote delivery caused a very long error message to be
4365 recorded - for instance if somebody sent an entire SpamAssassin report back
4366 as a large number of 550 error lines. This bug was coincidentally fixed by
4367 increasing the size of one of Exim's internal buffers (big_buffer) that
4368 happened as part of the Exiscan merge. However, to be on the safe side, I
4369 have made the code more robust (and fixed the comments that describe what
4372 53. Now that there can be additional text after "Completed" in log lines (if
4373 the queue_time_overall log selector is set), a one-byte patch to exigrep
4374 was needed to allow it to recognize "Completed" as not the last thing in
4377 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4378 patch that reportedly fixes this has been added. I am not expert enough to
4379 create a test for it. This is what the patch creator wrote:
4381 "I found a little strange behaviour of ldap code when working with
4382 Windows 2003 AD Domain, where users was placed in more than one
4383 Organization Units. When I tried to give exim partial DN, the exit code
4384 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4385 But simultaneously result of request was absolutely normal ldap result,
4386 so I produce this patch..."
4388 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4389 REFERENCE, so I have modified the code to exclude the patch when that macro
4392 55. Some experimental protocols are using DNS PTR records for new purposes. The
4393 keys for these records are domain names, not reversed IP addresses. The
4394 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4395 leaves it alone. Component reversal etc. now happens only for IP addresses.
4398 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4400 57. Double the size of the debug message buffer (to 2048) so that more of very
4401 long debug lines gets shown.
4403 58. The exicyclog utility now does better if the number of log files to keep
4404 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4406 59. Two changes related to the smtp_active_hostname option:
4408 (1) $smtp_active_hostname is now available as a variable.
4409 (2) The default for smtp_banner uses $smtp_active_hostname instead
4410 of $primary_hostname.
4412 60. The host_aton() function is supposed to be passed a string that is known
4413 to be a valid IP address. However, in the case of IPv6 addresses, it was
4414 not checking this. This is a hostage to fortune. Exim now panics and dies
4415 if the condition is not met. A case was found where this could be provoked
4416 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4417 components; fortuitously, this particular loophole had already been fixed
4418 by change 4.50/55 above.
4420 If there are any other similar loopholes, the new check in host_aton()
4421 itself should stop them being exploited. The report I received stated that
4422 data on the command line could provoke the exploit when Exim was running as
4423 exim, but did not say which command line option was involved. All I could
4424 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4425 running as the user.
4428 61. There was a buffer overflow vulnerability in the SPA authentication code
4429 (which came originally from the Samba project). I have added a test to the
4430 spa_base64_to_bits() function which I hope fixes it.
4433 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4434 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4436 63. The daemon start-up calls getloadavg() while still root for those OS that
4437 need the first call to be done as root, but it missed one case: when
4438 deliver_queue_load_max is set with deliver_drop_privilege. This is
4439 necessary for the benefit of the queue runner, because there is no re-exec
4440 when deliver_drop_privilege is set.
4442 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4443 This has been fixed.
4445 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4446 was in use, was not putting the data itself into the right store pool;
4447 consequently, it could be overwritten for a subsequent message in the same
4448 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4451 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4453 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4454 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4455 the function were treating the return as a boolean value, which happened to
4456 work because 0=false and not-0=true, but is not correct code.
4458 68. The host_aton() function was not handling scoped IPv6 addresses (those
4459 with, for example, "%eth0" on the end) correctly.
4461 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4462 negated items (that is, ~something) in unsigned ints. Some compilers
4463 apparently mutter when there is no cast.
4465 70. If an address verification called from an ACL failed, and did not produce a
4466 user-specific message (i.e. there was only a "system" message), nothing was
4467 put in $acl_verify_message. In this situation, it now puts the system
4470 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4471 session; change 4.31/43 added the unwanted input to the log line - except
4472 that it did not do this in the start of session case. It now does.
4474 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4475 This is wrong and can cause the other end to generate a synchronization
4476 error if it is another Exim or anything else that does the synchronization
4477 check. A QUIT command is no longer sent after a timeout.
4479 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4480 during host lookups.
4482 74. The defer_ok option of callout verification was not working if it was used
4483 when verifying addresses in header lines, that is, for this case:
4485 verify = header_sender/callout=defer_ok
4487 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4488 those file descriptors could be used for SMTP connections. If anything
4489 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4490 could be sent to the SMTP client, causing chaos. The daemon now opens
4491 stdin, stdout, and stderr to /dev/null when it puts itself into the
4494 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4495 log by default. The user can override this with suitable Perl magic.
4497 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4498 the log message when discard triggers, was not working for the DATA ACL or
4499 for the non-SMTP ACL.
4501 78. Error message wording change in sieve.c.
4503 79. If smtp_accept_max_per_host was set, the number of connections could be
4504 restricted to fewer than expected, because the daemon was trying to set up
4505 a new connection before checking whether the processes handling previous
4506 connections had finished. The check for completed processes is now done
4507 earlier. On busy systems, this bug wouldn't be noticed because something
4508 else would have woken the daemon, and it would have reaped the completed
4511 80. If a message was submitted locally by a user whose login name contained one
4512 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4513 It caused a spool format error. I have fixed the spool reading code. A
4514 related problem was that the "from" clause in the Received: line became
4515 illegal because of the space(s). It is now covered by ${quote_local_part.
4517 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4520 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4522 83. Patch from Sieve maintainer to fix unterminated string problem in
4523 "vacation" handling.
4525 84. Some minor changes to the Linux configuration files to help with other
4526 OS variants using glibc.
4528 85. One more patch for Sieve to update vacation handling to latest spec.
4531 ----------------------------------------------------
4532 See the note above about the 4.44 and 4.50 releases.
4533 ----------------------------------------------------
4539 1. Change 4.43/35 introduced a bug that caused file counts to be
4540 incorrectly computed when quota_filecount was set in an appendfile
4543 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4544 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4547 3. Give more explanation in the error message when the command for a transport
4548 filter fails to execute.
4550 4. There are several places where Exim runs a non-Exim command in a
4551 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4552 was being done only for the command run by the queryprogram router. It is
4553 now done for all such subprocesses. The other cases are: ${run, transport
4554 filters, and the commands run by the lmtp and pipe transports.
4556 5. Some older OS have a limit of 256 on the maximum number of file
4557 descriptors. Exim was using setrlimit() to set 1000 as a large value
4558 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4559 systems. I've change it so that if it can't get 1000, it tries for 256.
4561 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4562 was an oversight, and furthermore, ever since the addition of extra
4563 controls (e.g. 4.43/32), the checks on when to allow different forms of
4564 "control" were broken. There should now be diagnostics for all cases when a
4565 control that does not make sense is encountered.
4567 7. $recipients is now available in the predata ACL (oversight).
4569 8. Tidy the search cache before the fork to do a delivery from a message
4570 received from the command line. Otherwise the child will trigger a lookup
4571 failure and thereby defer the delivery if it tries to use (for example) a
4572 cached ldap connection that the parent has called unbind on.
4574 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4575 of $address_data from the recipient verification was clobbered by the
4576 sender verification.
4578 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4579 was its contents. (It was OK if the option was not defined at all.)
4581 11. A "Completed" log line is now written for messages that are removed from
4582 the spool by the -Mrm option.
4584 12. $host_address is now set to the target address during the checking of
4585 ignore_target_hosts.
4587 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4588 being passed; this would have caused $sender_host_name to have been used if
4589 matching the list had actually called for a host name (not very likely,
4590 since this list is usually IP addresses). A host name is now passed as
4593 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4594 code that specifies a non-restarting handler (typically sigaction() in
4595 modern systems) in an attempt to fix a rare and obscure crash bug.
4597 15. Narrowed the window for a race in the daemon that could cause it to ignore
4598 SIGCHLD signals. This is not a major problem, because they are used only to
4599 wake it up if nothing else does.
4601 16. A malformed maildirsize file could cause Exim to calculate negative values
4602 for the mailbox size or file count. Odd effects could occur as a result.
4603 The maildirsize information is now recalculated if the size or filecount
4606 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4607 support for a long time. Removed HAVE_SYS_VFS_H.
4609 18. Updated exipick to current release from John Jetmore.
4611 19. Allow an empty sender to be matched against a lookup in an address list.
4612 Previously the only cases considered were a regular expression, or an
4615 20. Exim went into a mad DNS lookup loop when doing a callout where the
4616 host was specified on the transport, if the DNS lookup yielded more than
4619 21. The RFC2047 encoding function was originally intended for short strings
4620 such as real names; it was not keeping to the 75-character limit for
4621 encoded words that the RFC imposes. It now respects the limit, and
4622 generates multiple encoded words if necessary. To be on the safe side, I
4623 have increased the buffer size for the ${rfc2047: expansion operator from
4626 22. Failure to deliver a bounce message always caused it to be frozen, even if
4627 there was an errors_to setting on the router. The errors_to setting is now
4630 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4631 canonical form (fully expanded) before being placed in
4632 $sender_host_address.
4634 24. Updated eximstats to version 1.33
4636 25. Include certificate and key file names in error message when GnuTLS fails
4637 to set them up, because the GnuTLS error message doesn't include the name
4638 of the failing file when there is a problem reading it.
4640 26. Expand error message when OpenSSL has problems setting up cert/key files.
4643 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4644 (this can affect the format of dates).
4646 28. exim_tidydb, when checking for the continued existence of a message for
4647 which it has found a message-specific retry record, was not finding
4648 messages that were in split spool directories. Consequently, it was
4649 deleting retry records that should have stayed in existence.
4651 29. eximstats updated to version 1.35
4652 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4653 1.35 - bugfix such that pie charts by volume are generated correctly
4655 30. The SPA authentication driver was not abandoning authentication and moving
4656 on to the next authenticator when an expansion was forced to fail,
4657 contradicting the general specification for all authenticators. Instead it
4658 was generating a temporary error. It now behaves as specified.
4660 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4661 (the order specifies the preference for clients). The order is now AES256,
4662 AES128, 3DES, ARCFOUR128.
4664 31. Small patch to Sieve code - explicitly set From: when generating an
4667 32. Exim crashed if a remote delivery caused a very long error message to be
4668 recorded - for instance if somebody sent an entire SpamAssassin report back
4669 as a large number of 550 error lines. This bug was coincidentally fixed by
4670 increasing the size of one of Exim's internal buffers (big_buffer) that
4671 happened as part of the Exiscan merge. However, to be on the safe side, I
4672 have made the code more robust (and fixed the comments that describe what
4675 33. Some experimental protocols are using DNS PTR records for new purposes. The
4676 keys for these records are domain names, not reversed IP addresses. The
4677 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4678 leaves it alone. Component reversal etc. now happens only for IP addresses.
4681 34. The host_aton() function is supposed to be passed a string that is known
4682 to be a valid IP address. However, in the case of IPv6 addresses, it was
4683 not checking this. This is a hostage to fortune. Exim now panics and dies
4684 if the condition is not met. A case was found where this could be provoked
4685 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4686 components; fortuitously, this particular loophole had already been fixed
4687 by change 4.50/55 or 4.44/33 above.
4689 If there are any other similar loopholes, the new check in host_aton()
4690 itself should stop them being exploited. The report I received stated that
4691 data on the command line could provoke the exploit when Exim was running as
4692 exim, but did not say which command line option was involved. All I could
4693 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4694 running as the user.
4697 35. There was a buffer overflow vulnerability in the SPA authentication code
4698 (which came originally from the Samba project). I have added a test to the
4699 spa_base64_to_bits() function which I hope fixes it.
4702 36. The daemon start-up calls getloadavg() while still root for those OS that
4703 need the first call to be done as root, but it missed one case: when
4704 deliver_queue_load_max is set with deliver_drop_privilege. This is
4705 necessary for the benefit of the queue runner, because there is no re-exec
4706 when deliver_drop_privilege is set.
4708 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4709 was in use, was not putting the data itself into the right store pool;
4710 consequently, it could be overwritten for a subsequent message in the same
4711 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4714 38. Sometimes the final signoff response after QUIT could fail to get
4715 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4716 < 0 before doing a fflush(). This bug looks as though it goes back to the
4717 introduction of TLS in release 3.20, but "sometimes" must have been rare
4718 because the tests only now provoked it.
4724 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4725 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4726 Now it returns an integer. A number of calls were still expecting a T/F
4727 return. Fortuitously, in all cases, the tests worked in OK situations,
4728 which is the norm. However, things would have gone wrong on any write
4729 failures on the smtp file descriptor. This function is used when sending
4730 messages over SMTP and also when doing verify callouts.
4732 2. When Exim is called to do synchronous delivery of a locally submitted
4733 message (the -odf or -odi options), it no longer closes stderr before doing
4736 3. Implemented the mua_wrapper option.
4738 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4740 5. Implemented the functions header_remove(), header_testname(),
4741 header_add_at_position(), and receive_remove_recipient(), and exported them
4744 6. If an ACL "warn" statement specified the addition of headers, Exim already
4745 inserted X-ACL-Warn: at the start if there was no header name. However, it
4746 was not making this test for the second and subsequent header lines if
4747 there were newlines in the string. This meant that an invalid header could
4748 be inserted if Exim was badly configured.
4750 7. Allow an ACL "warn" statement to add header lines at the start or after all
4751 the Received: headers, as well as at the end.
4753 8. Added the rcpt_4xx retry error code.
4755 9. Added postmaster_mailfrom=xxx to callout verification option.
4757 10. Added mailfrom=xxxx to the callout verification option, for verify=
4760 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4761 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4763 12. Inserted some casts to stop certain compilers warning when using pointer
4764 differences as field lengths or precisions in printf-type calls (mostly
4765 affecting debugging statements).
4767 13. Added optional readline() support for -be (dynamically loaded).
4769 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4770 same clock tick as a message's arrival, so that its received time was the
4771 same as the "first fail" time on the retry record, and that message
4772 remained on the queue past the ultimate address timeout, every queue runner
4773 would try a delivery (because it was past the ultimate address timeout) but
4774 after another failure, the ultimate address timeout, which should have then
4775 bounced the address, did not kick in. This was a "< instead of <=" error;
4776 in most cases the first failure would have been in the next clock tick
4777 after the received time, and all would be well.
4779 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4780 being recognized when the domain list was tested by the match_domain
4781 condition in an expansion string.
4783 16. Added the ${str2b64: operator.
4785 17. Exim was always calling setrlimit() to set a large limit for the number of
4786 processes, without checking whether the existing limit was already
4787 adequate. (It did check for the limit on file descriptors.) Furthermore,
4788 errors from getrlimit() and setrlimit() were being ignored. Now they are
4789 logged to the main and panic logs, but Exim does carry on, to try to do its
4790 job under whatever limits there are.
4792 18. Imported PCRE 5.0.
4794 19. Trivial typo in log message " temporarily refused connection" (the leading
4797 20. If the log selector return_path_on_delivery was set and an address was
4798 redirected to /dev/null, the delivery process crashed because it assumed
4799 that a return path would always be set for a "successful" delivery. In this
4800 case, the whole delivery is bypassed as an optimization, and therefore no
4803 21. Internal re-arrangement: the function for sending a challenge and reading
4804 a response while authentication was assuming a zero-terminated challenge
4805 string. It's now changed to take a pointer and a length, to allow for
4806 binary data in such strings.
4808 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4810 23. Exim was not respecting finduser_retries when seeking the login of the
4811 uid under which it was called; it was always trying 10 times. (The default
4812 setting of finduser_retries is zero.) Also, it was sleeping after the final
4813 failure, which is pointless.
4815 24. Implemented tls_on_connect_ports.
4817 25. Implemented acl_smtp_predata.
4819 26. If the domain in control=submission is set empty, Exim assumes that the
4820 authenticated id is a complete email address when it generates From: or
4821 Sender: header lines.
4823 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4824 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4825 chown and chgrp in /bin and hostname in /usr/bin.
4827 28. Exim was keeping the "process log" file open after each use, just as it
4828 does for the main log. This opens the possibility of it remaining open for
4829 long periods when the USR1 signal hits a daemon. Occasional processlog
4830 errors were reported, that could have been caused by this. Anyway, it seems
4831 much more sensible not to leave this file open at all, so that is what now
4834 29. The long-running daemon process does not normally write to the log once it
4835 has entered its main loop, and it closes the log before doing so. This is
4836 so that log files can straightforwardly be renamed and moved. However,
4837 there are a couple of unusual error situations where the daemon does write
4838 log entries, and I had neglected to close the log afterwards.
4840 30. The text of an SMTP error response that was received during a remote
4841 delivery was being truncated at 512 bytes. This is too short for some of
4842 the long messages that one sometimes sees. I've increased the limit to
4845 31. It is now possible to make retry rules that apply only when a message has a
4846 specific sender, in particular, an empty sender.
4848 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4849 it possible to be selective about when SMTP synchronization is enforced.
4851 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4853 32. Implemented hosts_connection_nolog.
4855 33. Added an ACL for QUIT.
4857 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4860 35. Added mailbox_size and mailbox_filecount to appendfile.
4862 36. Added control = no_multiline_responses to ACLs.
4864 37. There was a bug in the logic of the code that waits for the clock to tick
4865 in the case where the clock went backwards by a substantial amount such
4866 that the microsecond fraction of "now" was more than the microsecond
4867 fraction of "then" (but the whole seconds number was less).
4869 38. Added support for the libradius Radius client library this is found on
4870 FreeBSD (previously only the radiusclient library was supported).
4876 1. When certain lookups returned multiple values in the form name=value, the
4877 quoting of the values was not always being done properly. Specifically:
4878 (a) If the value started with a double quote, but contained no whitespace,
4880 (b) If the value contained whitespace other than a space character (i.e.
4881 tabs or newlines or carriage returns) it was not quoted.
4882 This fix has been applied to the mysql and pgsql lookups by writing a
4883 separate quoting function and calling it from the lookup code. The fix
4884 should probably also be applied to nisplus, ibase and oracle lookups, but
4885 since I cannot test any of those, I have not disturbed their existing code.
4887 2. A hit in the callout cache for a specific address caused a log line with no
4888 reason for rejecting RCPT. Now it says "Previous (cached) callout
4889 verification failure".
4891 3. There was an off-by-one bug in the queryprogram router. An over-long
4892 return line was truncated at 256 instead of 255 characters, thereby
4893 overflowing its buffer with the terminating zero. As well as fixing this, I
4894 have increased the buffer size to 1024 (and made a note to document this).
4896 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4897 when Exim is waiting for an SMTP response from a remote server, Exim
4898 restarts its select() call on the socket, thereby resetting its timeout.
4899 This is not a problem when such interrupts are rare. Somebody set up a cron
4900 job to run exiwhat every 2 minutes, which is less than the normal select()
4901 timeout (5 or 10 minutes). This meant that the select() timeout never
4902 kicked in because it was always reset. I have fixed this by comparing the
4903 time when an interrupt arrives with the time at the start of the first call
4904 to select(). If more time than the timeout has elapsed, the interrupt is
4905 treated as a timeout.
4907 5. Some internal re-factoring in preparation for the addition of Sieve
4908 extensions (by MH). In particular, the "personal" test is moved to a
4909 separate function, and given an option for scanning Cc: and Bcc: (which is
4910 not set for Exim filters).
4912 6. When Exim created an email address using the login of the caller as the
4913 local part (e.g. when creating a From: or Sender: header line), it was not
4914 quoting the local part when it contained special characters such as @.
4916 7. Installed new OpenBSD configuration files.
4918 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4919 try to make them clearer.
4921 9. Callout options, other than the timeout value, were being ignored when
4922 verifying sender addresses in header lines. For example, when using
4924 verify = header_sender/callout=no_cache
4926 the cache was (incorrectly) being used.
4928 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4929 only the Cygwin environment.
4931 11. When return_path_on_delivery was set as a log selector, if different remote
4932 addresses in the same message used different return paths and parallel
4933 remote delivery occurred, the wrong values would sometimes be logged.
4934 (Whenever a remote delivery process finished, the return path value from
4935 the most recently started remote delivery process was logged.)
4937 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4938 lines when AUTH and/or TLS are in use. This is the "received protocol"
4939 field. Exim used to use "asmtp" for authenticated SMTP, without any
4940 indication (in the protocol name) for TLS use. Now it follows the RFC and
4941 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4942 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4943 names appear in log lines as well as in Received: header lines.
4945 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4946 extensions, and comparison tests, and to fix some bugs.
4948 14. Changes to the "personal" filter test:
4950 (1) The test was buggy in that it was just doing the equivalent of
4951 "contains" tests on header lines. For example, if a user's address was
4952 anne@some.where, the "personal" test would incorrectly be true for
4954 To: susanne@some.where
4956 This test is now done by extracting each address from the header in turn,
4957 and checking the entire address. Other tests that are part of "personal"
4958 are now done using regular expressions (for example, to check local parts
4959 of addresses in From: header lines).
4961 (2) The list of non-personal local parts in From: addresses has been
4962 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4963 taken from the Sieve specification recommendations.
4965 (3) If the message contains any header line starting with "List-" it is
4966 treated as non-personal.
4968 (4) The test for "circular" in the Subject: header line has been removed
4969 because it now seems ill-conceived.
4971 15. Minor typos in src/EDITME comments corrected.
4973 16. Installed latest exipick from John Jetmore.
4975 17. If headers_add on a router specified a text string that was too long for
4976 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4977 of string_sprintf() is now avoided.
4979 18. $message_body_size was not set (it was always zero) when running the DATA
4980 ACL and the local_scan() function.
4982 19. For the "mail" command in an Exim filter, no default was being set for
4983 the once_repeat time, causing a random time value to be used if "once" was
4984 specified. (If the value happened to be <= 0, no repeat happened.) The
4985 default is now 0s, meaning "never repeat". The "vacation" command was OK
4986 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4987 (I found it when inspecting the code).
4989 20. There is now an overall timeout for performing a callout verification. It
4990 defaults to 4 times the callout timeout, which applies to individual SMTP
4991 commands during the callout. The overall timeout applies when there is more
4992 than one host that can be tried. The timeout is checked before trying the
4993 next host. This prevents very long delays if there are a large number of
4994 hosts and all are timing out (e.g. when the network connections are timing
4995 out). The value of the overall timeout can be changed by specifying an
4996 additional sub-option for "callout", called "maxwait". For example:
4998 verify = sender/callout=5s,maxwait=20s
5000 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5001 to the end before writing, but this should make it even safer).
5003 22. Exim was forgetting that it had advertised PIPELINING for the second and
5004 subsequent messages on an SMTP connection. It was also not resetting its
5005 memory on STARTTLS and an internal HELO.
5007 23. When Exim logs an SMTP synchronization error within a session, it now
5008 records whether PIPELINING has been advertised or not.
5010 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5011 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5012 rather than long int.
5014 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5016 26. Added the never_mail option to autoreply.
5022 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5023 crash if the getsockname() call failed; this can happen if a connection is
5024 closed very soon after it is established. The problem was simply in the
5025 order in which certain operations were done, causing Exim to try to write
5026 to the SMTP stream before it had set up the file descriptor. The bug has
5027 been fixed by making things happen in the correct order.
5033 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5034 before the connection was closed, thus losing the rejection response.
5036 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5037 some early Solaris releases, but causes trouble in current releases where
5038 socklen_t is defined.
5040 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5043 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5046 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5047 that releasing the top of it at the end releases what was used for sub-
5048 expansions (unless the block got too big). However, discard this block if
5049 the first thing is a variable or header, so that we can use its block when
5050 it is dynamic (useful for very large $message_headers, for example).
5052 6. Lookups now cache *every* query, not just the most recent. A new, separate
5053 store pool is used for this. It can be recovered when all lookup caches are
5054 flushed. Lookups now release memory at the end of their result strings.
5055 This has involved some general refactoring of the lookup sources.
5057 7. Some code has been added to the store_xxx() functions to reduce the amount
5058 of flapping under certain conditions.
5060 8. log_incoming_interface used to affect only the <= reception log lines. Now
5061 it causes the local interface and port to be added to several more SMTP log
5062 lines, for example "SMTP connection from", and rejection lines.
5064 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5066 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5068 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5069 could be overwritten at the end of the current message (or the start of a
5070 new message if it was set in a HELO ACL). The value is now preserved for
5071 the duration of the SMTP connection.
5073 12. If a transport had a headers_rewrite setting, and a matching header line
5074 contained an unqualified address, that address was qualified, even if it
5075 did not match any rewriting rules. The underlying bug was that the values
5076 of the flags that permit the existence of unqualified sender and recipient
5077 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5078 non-local messages, and by -bnq for local messages) were not being
5079 preserved with the message after it was received.
5081 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5082 "next input=" as part of the text comprising the host identity instead of
5083 the correct text. The code was using the same buffer for two different
5084 strings. However, depending on which order the printing function evaluated
5085 its arguments, the bug did not always show up. Under Linux, for example, my
5086 test suite worked just fine.
5088 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5089 doesn't work with some older versions of Perl. It has been changed to "my",
5090 which in any case is probably the better facility to use.
5092 15. A really picky compiler found some instances of statements for creating
5093 error messages that either had too many or two few arguments for the format
5096 16. The size of the buffer for calls to the DNS resolver has been increased
5097 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5098 for addresses that have a lot of PTR records. This alleviates a problem; it
5099 does not fully solve it.
5101 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5102 buffer now truncates the list and logs the incident, which is the same
5103 action as happens when Exim is looking up a host name and its aliases.
5104 Previously in this situation something unpredictable would happen;
5105 sometimes it was "internal error: store_reset failed".
5107 18. If a server dropped the connection unexpectedly when an Exim client was
5108 using GnuTLS and trying to read a response, the client delivery process
5109 crashed while trying to generate an error log message.
5111 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5112 string, for example:
5114 warn message = H1: something\nH2: something
5116 the text was added as a single header line from Exim's point of view
5117 though it ended up OK in the delivered message. However, searching for the
5118 second and subsequent header lines using $h_h2: did not work. This has been
5119 fixed. Similarly, if a system filter added multiple headers in this way,
5120 the routers could not see them.
5122 20. Expanded the error message when iplsearch is called with an invalid key to
5123 suggest using net-iplsearch in a host list.
5125 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5126 ACLs are no longer actually imposed (and a message to that effect is
5129 22. If a "gecos" field in a passwd entry contained escaped characters, in
5130 particular, if it contained a \" sequence, Exim got it wrong when building
5131 a From: or a Sender: header from that name. A second bug also caused
5132 incorrect handling when an unquoted " was present following a character
5133 that needed quoting.
5135 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5136 was not being matched caselessly.
5138 24. Arranged for all hyphens in the exim.8 source to be escaped with
5141 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5142 properly. Recipient callout cache records were still being keyed to include
5143 the sender, even when use_sender was set false. This led to far more
5144 callouts that were necessary. The sender is no longer included in the key
5145 when use_sender is false.
5147 26. Added "control = submission" modifier to ACLs.
5149 27. Added the ${base62d: operator to decode base 62 numbers.
5151 28. dnsdb lookups can now access SRV records.
5153 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5154 the configuration file.
5156 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5157 (-v) mode. This makes the output for a verbose queue run more intelligible.
5159 31. Added a use_postmaster feature to recipient callouts.
5161 32. Added the $body_zerocount variable, containing the number of binary zero
5162 bytes in the message body.
5164 33. The time of last modification of the "new" subdirectory is now used as the
5165 "mailbox time last read" when there is a quota error for a maildir
5168 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5170 35. Added +ignore_unknown as a special item in host lists.
5172 36. Code for decoding IPv6 addresses in host lists is now included, even if
5173 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5174 address was recognized as an IP address, but was then not correctly decoded
5175 into binary, causing unexpected and incorrect effects when compared with
5182 1. Very minor rewording of debugging text in manualroute to say "list of
5183 hosts" instead of "hostlist".
5185 2. If verify=header_syntax was set, and a header line with an unqualified
5186 address (no domain) and a large number of spaces between the end of the
5187 name and the colon was received, the reception process suffered a buffer
5188 overflow, and (when I tested it) crashed. This was caused by some obsolete
5189 code that should have been removed. The fix is to remove it!
5191 3. When running in the test harness, delay a bit after writing a bounce
5192 message to get a bit more predictability in the log output.
5194 4. Added a call to search_tidyup() just before forking a reception process. In
5195 theory, someone could use a lookup in the expansion of smtp_accept_max_
5196 per_host which, without the tidyup, could leave open a database connection.
5198 5. Added the variables $recipient_data and $sender_data which get set from a
5199 lookup success in an ACL "recipients" or "senders" condition, or a router
5200 "senders" option, similar to $domain_data and $local_part_data.
5202 6. Moved the writing of debug_print from before to after the "senders" test
5205 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5206 problems for message scanning, either using a data ACL, or using
5207 local_scan() because the Received: header was not generated till after they
5208 were called (in order to set the time as the time of reception completion).
5209 I have revised the way this works. The header is now generated after the
5210 body is received, but before the ACL or local_scan() are called. After they
5211 are run, the timestamp in the header is updated.
5217 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5218 before starting a queue runner without re-exec. This happened only when
5219 deliver_drop_privilege was set or when the Exim user was set to root. The
5220 effect of the bug was that timeouts during subsequent deliveries caused
5221 crashes instead of being properly handled. The handler is now left at its
5222 default (and expected) setting.
5224 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5225 message, again when deliver_drop_privilege is set or Exim is run as root.
5226 The bug described in (1) was not present in this case, but the tidying up
5227 of the other signals was missing. I have made the two cases consistent.
5229 3. The ignore_target_hosts setting on a manualroute router was being ignored
5230 for hosts that were looked up using the /MX notation.
5232 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5235 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5236 operated on the sender address. After changing the $sender_address to <>
5237 for the sender address verify, Exim was re-instated it as the original
5238 (before rewriting) address, but remembering that it had rewritten it, so it
5239 wasn't rewriting it again. This bug also had the effect of breaking the
5240 sender address verification caching when the sender address was rewritten.
5242 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5243 This has been changed so that if the ip literal address matches
5244 ignore_target_hosts, the router declines.
5246 7. Added expansion conditions match_domain, match_address, and match_local_
5247 part (NOT match_host).
5249 8. The placeholder for the Received: header didn't have a length field set.
5251 9. Added code to Exim itself and to exim_lock to test for a specific race
5252 condition that could lead to file corruption when using MBX delivery. The
5253 issue is with the lockfile that is created in /tmp. If this file is removed
5254 after a process has opened it but before that process has acquired a lock,
5255 there is the potential for a second process to recreate the file and also
5256 acquire a lock. This could lead to two Exim processes writing to the file
5257 at the same time. The added code performs the same test as UW imapd; it
5258 checks after acquiring the lock that its file descriptor still refers to
5259 the same named file.
5261 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5262 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5265 11. Added the smtp_active_hostname option. If used, this will typically be made
5266 to depend on the incoming interface address. Because $interface_address is
5267 not set up until the daemon has forked a reception process, error responses
5268 that can happen earlier (such as "too many connections") no longer contain
5271 12. If an expansion in a condition on a "warn" statement fails because a lookup
5272 defers, the "warn" statement is abandoned, and the next ACL statement is
5273 processed. Previously this caused the whole ACL to be aborted.
5275 13. Added the iplsearch lookup type.
5277 14. Added ident_timeout as a log selector.
5279 15. Added tls_certificate_verified as a log selector.
5281 16. Added a global option tls_require_ciphers (compare the smtp transport
5282 option of the same name). This controls incoming TLS connections.
5284 17. I finally figured out how to make tls_require_ciphers do a similar thing
5285 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5286 before starting the TLS session.
5288 18. Tabs are now shown as \t in -bP output.
5290 19. If the log selector return_path_on_delivery was set, Exim crashed when
5291 bouncing a message because it had too many Received: header lines.
5293 20. If two routers both had headers_remove settings, and the first one included
5294 a superfluous trailing colon, the final name in the first list and the
5295 first name in the second list were incorrectly joined into one item (with a
5296 colon in the middle).
5302 1. Added -C and -D options to the exinext utility, mainly to make it easier
5303 to include in the automated testing, but these could be helpful when
5304 multiple configurations are in use.
5306 2. The exinext utility was not formatting the output nicely when there was
5307 an alternate port involved in the retry record key, nor when there was a
5308 message id as well (for retries that were specific to a specific message
5309 and a specific host). It was also confused by IPv6 addresses, because of
5310 the additional colons they contain. I have fixed the IPv4 problem, and
5311 patched it up to do a reasonable job for IPv6.
5313 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5314 delivery, the log line now contains "pipelined" if PIPELINING was used.
5316 4. An SMTP transport process used to panic and die if the bind() call to set
5317 an explicit outgoing interface failed. This has been changed; it is now
5318 treated in the same way as a connect() failure.
5320 5. A reference to $sender_host_name in the part of a conditional expansion
5321 that was being skipped was still causing a DNS lookup. This no longer
5324 6. The def: expansion condition was not recognizing references to header lines
5325 that used bh_ and bheader_.
5327 7. Added the _cache feature to named lists.
5329 8. The code for checking quota_filecount in the appendfile transport was
5330 allowing one more file than it should have been.
5332 9. For compatibility with Sendmail, the command line option
5340 and sets the incoming protocol and host name (for trusted callers). The
5341 host name and its colon can be omitted when only the protocol is to be set.
5342 Note the Exim already has two private options, -pd and -ps, that refer to
5343 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5344 "s", but I don't think that's a major issue.
5346 10. A number of refactoring changes to the code, none of which should affect
5349 (a) The number of logging options was getting close to filling up the
5350 32-bit word that was used as a bit map. I have split them into two classes:
5351 those that are passed in the argument to log_write(), and those that are
5352 only ever tested independently outside of that function. These are now in
5353 separate 32-bit words, so there is plenty of room for expansion again.
5354 There is no change in the user interface or the logging behaviour.
5356 (b) When building, for example, log lines, the code previously used a
5357 macro that called string_cat() twice, in order to add two strings. This is
5358 not really sufficiently general. Furthermore, there was one instance where
5359 it was actually wrong because one of the argument was used twice, and in
5360 one call a function was used. (As it happened, calling the function twice
5361 did not affect the overall behaviour.) The macro has been replaced by a
5362 function that can join an arbitrary number of extra strings onto a growing
5365 (c) The code for expansion conditions now uses a table and a binary chop
5366 instead of a serial search (which was left over from when there were very
5367 few conditions). Also, it now recognizes conditions like "pam" even when
5368 the relevant support is not compiled in: a suitably worded error message is
5369 given if an attempt is made to use such a condition.
5371 11. Added ${time_interval:xxxxx}.
5373 12. A bug was causing one of the ddress fields not to be passed back correctly
5374 from remote delivery subprocesses. The field in question was not being
5375 subsequently used, so this caused to problems in practice.
5377 13. Added new log selectors queue_time and deliver_time.
5379 14. Might have fixed a bug in maildirsizefile handling that threw up
5380 "unexpected character" debug warnings, and recalculated the data
5381 unnecessarily. In any case, I expanded the warning message to give more
5384 15. Added the message "Restricted characters in address" to the statements in
5385 the default ACL that block characters like @ and % in local parts.
5387 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5388 Three changes have been made:
5390 (a) There was a serious bug; a negative response to MAIL caused the whole
5391 recipient domain to be cached as invalid, thereby blocking all messages
5392 to all local parts at the same domain, from all senders. This bug has
5393 been fixed. The domain is no longer cached after a negative response to
5394 MAIL if the sender used is not empty.
5396 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5399 (c) A new callout option, "use_sender" has been added for people who want
5400 the modified behaviour.
5406 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5409 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5410 indeed breaks things for older releases.
5412 3. Added additional logging to the case where there is a problem reading data
5413 from a filter that is running in a subprocess using a pipe, in order to
5414 try to track down a specific problem.
5416 4. Testing facility fudge: when running in the test harness and attempting
5417 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5418 getting "No route to host". Convert this to a timeout.
5420 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5423 6. Some OS don't have socklen_t but use size_t instead. This affects the
5424 fifth argument of getsockopt() amongst other things. This is now
5425 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5426 can be set for individual OS. I have set it for SunOS5, OSF1, and
5427 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5428 some earlier ones do not.
5430 7. Change 4.30/15 was not doing the test caselessly.
5432 8. The standard form for an IPv6 address literal was being rejected by address
5433 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5434 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5435 this, as well as the form without the "IPv6" on the front (but only when
5436 address literals are enabled, of course).
5438 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5440 10. Exim crashed if a message with an empty sender address specified by -f
5441 encountered a router with an errors_to setting. This could be provoked only
5442 by a command such as
5446 where an empty string was supplied; "<>" did not hit this bug.
5448 11. Installed PCRE release 4.5.
5450 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5451 remained set. It is now erased.
5453 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5454 times from message ids (which are base 36 rather than the normal 62).
5456 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5457 were being counted as actual protocol errors, and logged if the log
5458 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5459 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5460 and DATA following a set of rejected RCPTs do not count as protocol errors.
5461 In other words, Exim assumes they were pipelined, though this may not
5462 actually be the case. Of course, in all cases the client gets an
5463 appropriate error code.
5465 15. If a lookup fails in an ACL condition, a message about the failure may
5466 be available; it is used if testing the ACL cannot continue, because most
5467 such messages specify what the cause of the deferral is. However, some
5468 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5469 that caused an old message to be retained and used if a later statement
5470 caused a defer, replacing the real cause of the deferral.
5472 16. If an IP address had so many PTR records that the DNS lookup buffer
5473 was not large enough to hold them, Exim could crash while trying to process
5474 the truncated data. It now detects and logs this case.
5476 17. Further to 4.21/58, another change has been made: if (and only if) the
5477 first line of a message (the first header line) ends with CRLF, a bare LF
5478 in a subsequent header line has a space inserted after it, so as not to
5479 terminate the header.
5481 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5482 unnecessarily, used atoi() instead of strtol(), and didn't check the
5483 termination when getting file sizes from file names by regex.
5485 19. Completely re-implemented the support for maildirsize files, in the light
5486 of a number of problems with the previous contributed implementation
5487 (4.30/29). In particular:
5489 . If the quota is zero, the maildirsize file is maintained, but no quota is
5492 . If the maildir directory does not exist, it is created before any attempt
5493 to write a maildirsize file.
5495 . The quota value in the file is just a cache; if the quota is changed in
5496 the transport, the new value overrides.
5498 . A regular expression is available for excluding directories from the
5501 20. The autoreply transport checks the characters in options that define the
5502 message's headers; it allows continued headers, but it was checking with
5503 isspace() after an embedded newline instead of explicitly looking for a
5506 21. If all the "regular" hosts to which an address was routed had passed their
5507 expiry times, and had not reached their retry times, the address was
5508 bounced, even if fallback hosts were defined. Now Exim should go on to try
5511 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5512 equivalent code in the SMTP transport. Some hosts send humungous responses
5513 to HELO/EHLO, more than 1024 it seems.
5515 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5516 gives compiler warnings in some environments. I've now done it "properly",
5519 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5520 (because of problems with the built-in one) was declared to return uschar *
5521 instead of char *, causing compiler failure.
5523 25. Fixed a file descriptor leak when processing alias/forward files.
5525 26. Fixed a minor format string issue in dbfn.c.
5527 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5529 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5530 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5533 29. When a sender address is verified, it is cached, to save repeating the test
5534 when there is more than one recipient in a message. However, when the
5535 verification involves a callout, it is possible for different callout
5536 options to be set for different recipients. It is too complicated to keep
5537 track of this in the cache, so now Exim always runs a verification when a
5538 callout is required, relying on the callout cache for the optimization.
5539 The overhead is duplication of the address routing, but this should not be
5542 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5543 to be verified with callout=postmaster, and the main callout worked but the
5544 postmaster check failed, the verification correctly failed. However, if a
5545 subsequent RCPT command asked for sender verification *without* the
5546 postmaster check, incorrect caching caused this verification also to fail,
5549 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5550 it was not caching the DNS options (qualify_single, search_parents) that
5551 were used when the lookup failed. A subsequent lookup with different
5552 options therefore always gave the same answer, though there were cases
5553 where it should not have. (Example: a "domains = !$mx_any" option on a
5554 dnslookup router: the "domains" option is always processed without any
5555 widening, but the router might have qualify_single set.) Now Exim uses the
5556 cached value only when the same options are set.
5558 32. Added John Jetmore's "exipick" utility to the distribution.
5560 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5561 than a timeout (e.g. a certificate is required, and is not provided), an
5562 Exim server now closes the connection immediately. Previously it waited for
5563 the client to close - but if the client is SSL, it seems that they each
5564 wait for each other, leading to a delay before one of them times out.
5566 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5567 maintained 0.8.x compatibility because I don't think many are using it, and
5568 it is clearly obsolete.
5570 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5573 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5574 client certificate was expired. A simple patch fixes this, though I don't
5575 understand the full logic of why the verify callback is called multiple
5578 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5579 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5580 which causes problems with some clients (such as the Certicom SSL Plus
5581 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5582 disables the coutermeasure allowing Eudora to connect."
5584 38. Exim was not checking that a write() to a log file succeeded. This could
5585 lead to Bad Things if a log got too big, in particular if it hit a file
5586 size limit. Exim now panics and dies if it cannot write to a log file, just
5587 as it does if it cannot open a log file.
5589 39. Modified OS/Makefile-Linux so that it now contains
5591 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5593 The two -D definitions ensure that Exim is compiled with large file
5594 support, which makes it possible to handle log files that are bigger than
5597 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5598 instance) a domain was checked against a named list that involved a lookup,
5599 causing $domain_data to be set, then another domain was checked against the
5600 same list, then the first domain was re-checked, the value of $domain_data
5601 after the final check could be wrong. In particular, if the second check
5602 failed, it could be set empty. This bug probably also applied to
5605 41. The strip_trailing_dot option was not being applied to the address given
5606 with the -f command-line option.
5608 42. The code for reading a message's header from the spool was incrementing
5609 $received_count, but never initializing it. This meant that the value was
5610 incorrect (doubled) while delivering a message in the same process in which
5611 it was received. In the most common configuration of Exim, this never
5612 happens - a fresh exec is done - but it can happen when
5613 deliver_drop_privilege is set.
5615 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5616 it now includes up to 150 characters of the unexpected data in the log
5619 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5620 and building data strings. The size of both of these buffers was 10 000
5621 bytes - far larger than anybody would *ever* want, thought I. Needless to
5622 say, somebody hit the limit. I have increased the maximum line length to
5623 20 000 and the maximum data length of concatenated lines to 100 000. I have
5624 also fixed two bugs, because there was no checking on these buffers. Tsk,
5625 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5626 buffer is too small.
5628 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5629 lsearch lookups. Now it does.
5631 46. When parsing a route_list item in a manualroute router, a fixed-length
5632 buffer was used for the list of hosts. I made this 1024 bytes long,
5633 thinking that nobody would ever have a list of hosts that long. Wrong.
5634 Somebody had a whole pile of complicated expansion conditions, and the
5635 string was silently truncated, leading to an expansion error. It turns out
5636 that it is easier to change to an unlimited length (owing to other changes
5637 that have happened since this code was originally written) than to build
5638 structure for giving a limitation error. The length of the item that
5639 expands into the list of hosts is now unlimited.
5641 47. The lsearch lookup could not handle data where the length of text line was
5642 more than 4095 characters. Such lines were truncated, leading to shortened
5643 data being returned. It should now handle lines of any length.
5645 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5646 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5649 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5650 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5651 no longer happens in comment lines. A list of replacements is now placed
5652 at the head of all of the source files, except those whose only change is
5653 to replace PERL_COMMAND in the very first #! line.
5655 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5656 messages on the queue, with a bottom-up merge sort, using code contributed
5657 by Michael Haardt. This should make operations like -bp somewhat faster on
5658 large queues. It won't affect queue runners, except when queue_run_in_order
5661 51. Installed eximstats 1.31 in the distribution.
5663 52. Added support for SRV lookups to the dnslookup router.
5665 53. If an ACL referred to $message_body or $message_body_end, the value was not
5666 reset for any messages that followed in the same SMTP session.
5668 54. The store-handling optimization for building very long strings was not
5669 differentiating between the different store pools. I don't think this
5670 actually made any difference in practice, but I've tidied it.
5672 55. While running the routers to verify a sender address, $sender_address
5673 was still set to the sender address. This is wrong, because when routing to
5674 send a bounce to the sender, it would be empty. Therefore, I have changed
5675 it so that, while verifying a sender address, $sender_address is set to <>.
5676 (There is no change to what happens when verifying a recipient address.)
5678 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5679 target A or AAAA records (if not already returned) without resetting the
5680 qualify_single or search_parents options of the DNS resolver. These are
5681 inappropriate in this case because the targets of MX and SRV records must
5682 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5683 target that, when qualified, matched something in the local domain. These
5684 two options are now turned off when doing these lookups.
5686 57. It seems that at least some releases of Reiserfs (which does not have the
5687 concept of a fixed number of inodes) returns zero and not -1 for the
5688 number of available inodes. This interacted badly with check_spool_inodes,
5689 which assumed that -1 was the "no such thing" setting. What I have done is
5690 to check that the total number of inodes is greater than zero before doing
5691 the test of how many are available.
5693 58. When a "warn" ACL statement has a log_message modifier, the message is
5694 remembered, and not repeated. This is to avoid a lot of repetition when a
5695 message has many recipients that cause the same warning to be written.
5696 However, Exim was preserving the list of already written lines for an
5697 entire SMTP session, which doesn't seem right. The memory is now reset if a
5698 new message is started.
5700 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5701 debugging output unless log_rewrite was also set.
5703 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5704 of (int)(handle) when we know that handle contains (void *)(-1).
5706 61. The Exim daemon panic-logs an error return when it closes the incoming
5707 connection. However "connection reset by peer" seems to be common, and
5708 isn't really an error worthy of noting specially, so that particular error
5711 62. When Exim is trying to find all the local interfaces, it used to panic and
5712 die if the ioctl to get the interface flags failed. However, it seems that
5713 on at least one OS (Solaris 9) it is possible to have an interface that is
5714 included in the list of interfaces, but for which you get a failure error
5715 for this call. This happens when the interface is not "plumbed" into a
5716 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5717 failure of the "get flags" call assumes that the interface is down.
5719 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5720 makes life easier for people who are doing arithmetic on fields extracted
5721 from dates, where you often get leading zeros that should not be
5722 interpreted as octal.
5724 64. Added qualify_domain to the redirect router, to override the global
5727 65. If a pathologically long header line contained very many addresses (the
5728 report of this problem mentioned 10 000) and each of them was rewritten,
5729 Exim could use up a very large amount of memory. (It kept on making new
5730 copies of the header line as it rewrote, and never released the old ones.)
5731 At the expense of a bit more processing, the header rewriting function has
5732 been changed so that it no longer eats memory in this way.
5734 66. The generation of the Received: header has been moved from the time that a
5735 message starts to be received, to the time that it finishes. The timestamp
5736 in the Received: header should now be very close to that of the <= log
5737 line. There are two side-effects of this change:
5739 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5740 logged header lines no longer include the local Received: line, because
5741 it has not yet been created. The same applies to a copy of the message
5742 that is returned to a non-SMTP sender when a message is rejected.
5744 (b) When a filter file is tested using -bf, no additional Received: header
5745 is added to the test message. After some thought, I decided that this
5748 This change does not affect the value of $received_for. It is still set
5749 after address rewriting, but before local_scan() is called.
5751 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5753 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5754 gave an unhelpful panic error message, and a defer error. I have managed to
5755 change this behaviour so that it now rejects any supplied certificate,
5756 which seems right, as the list of acceptable certificates is empty.
5758 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5759 gave an unhelpful defer error. I have not managed to make this reject any
5760 supplied certificates, but the error message it gives is "no certificate
5761 supplied", which is not helpful.
5763 70. exigrep's output now also includes lines that are not associated with any
5764 message, but which match the given pattern. Implemented by a patch from
5765 Martin Sluka, which also tidied up the Perl a bit.
5767 71. Recipient callout verification, like sender verification, was using <> in
5768 the MAIL FROM command. This isn't really the right thing, since the actual
5769 sender may affect whether the remote host accepts the recipient or not. I
5770 have changed it to use the actual sender in the callout; this means that
5771 the cache record is now keyed on a recipient/sender pair, not just the
5772 recipient address. There doesn't seem to be a real danger of callout loops,
5773 since a callout by the remote host to check the sender would use <>.
5774 [SEE ABOVE: changed after hitting problems.]
5776 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5777 temporary errors. However, in the case of such a code being given after
5778 the end of a data transmission (i.e. after ".") Exim was failing to write
5779 a retry record for the message. (Yes, there was some broken host that was
5780 actually sending 8xx at this point.)
5782 73. An unknown lookup type in a host list could cause Exim to panic-die when
5783 the list was checked. (An example that provoked this was putting <; in the
5784 middle of a list instead of at the start.) If this happened during a DATA
5785 ACL check, a -D file could be left lying around. This kind of configuration
5786 error no longer causes Exim to die; instead it causes a defer error. The
5787 incident is still logged to the main and panic logs.
5789 74. Buglet left over from Exim 3 conversion. The message "too many messages
5790 in one connection" was written to the rejectlog but not the mainlog, except
5791 when address rewriting (yes!) was being logged.
5793 75. Added write_rejectlog option.
5795 76. When a system filter was run not as root (that is, when system_filter_user
5796 was set), the values of the $n variables were not being returned to the
5797 main process; thus, they were not subsequently available in the $sn
5800 77. Added +return_path_on_delivery log selector.
5802 78. A connection timeout was being treated differently from recipients deferred
5803 when testing hosts_max_try with a message that was older than the host's
5804 retry timeout. (The host should not be counted, thus allowing all hosts to
5805 be tried at least once before bouncing.) This may have been the cause of an
5806 occasionally reported bug whereby a message would remain on the queue
5807 longer than the retry timeout, but would be bounced if a delivery was
5808 forced. I say "may" because I never totally pinned down the problem;
5809 setting up timeout/retry tests is difficult. See also the next item.
5811 79. The ultimate address timeout was not being applied to errors that involved
5812 a combination of host plus message (for example, a timeout on a MAIL
5813 command). When an address resolved to a number of possible hosts, and they
5814 were not all tried for each delivery (e.g. because of hosts_max_try), a
5815 message could remain on the queue longer than the retry timeout.
5817 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5820 81. Fixed an obscure SMTP outgoing bug which required at least the following
5821 conditions: (a) there was another message waiting for the same server;
5822 (b) the server returned 5xx to all RCPT commands in the first message so
5823 that the message was not completed; (c) the server dropped the connection
5824 or gave a negative response to the RSET that Exim sends to abort the
5825 transaction. The observed case was a dropped connection after DATA that had
5826 been sent in pipelining mode. That is, the server had advertised PIPELINING
5827 but was not implementing it correctly. The effect of the bug was incorrect
5828 behaviour, such as trying another host, and this could lead to a crash.
5834 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5835 and daemon.c were passed as pointers to ints; they should have been
5836 pointers to socklen_t variables (which are typically unsigned ints).
5838 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5841 3. Fixed a really odd bug that affected only the testing scheme; patching a
5842 certain fixed string in the binary changed the value of another string that
5843 happened to be identical to the end of the original first string.
5845 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5846 name", it returns that address as the IP address. On some operating
5847 systems (e.g. Solaris), it also passes back the IP address string as the
5848 "host name". However, on others (e.g. Linux), it passes back an empty
5849 string. Exim wasn't checking for this, and was changing the host name to an
5850 empty string, assuming it had been canonicalized.
5852 5. Although rare, it is permitted to have more than one PTR record for a given
5853 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5854 all the names associated with an address, because they do in Solaris.
5855 However, it seems that they do not in Linux for data that comes from the
5856 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5857 I found this out when I moved to a new Linux workstation and tried to run
5858 the Exim test suite.
5860 To get round this problem I have changed the code so that it now does its
5861 own call to the DNS to look up PTR records when searching for a host name.
5862 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5863 addresses that are only in /etc/hosts are still found.
5865 This behaviour is, however, controlled by an option called host_lookup_
5866 order, which defaults to "bydns:byaddr". If people want to use the other
5867 order, or indeed, just use one or the other means of lookup, they can
5868 specify it in this variable.
5870 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5871 some operating systems, this comes back from gethostbyaddr() as an empty
5872 string, and this is what Exim used to test for. However, it seems that in
5873 other systems, "." is yielded. Exim now tests for this case too.
5875 7. The values of check_spool_space and check_log_space are now held internally
5876 as a number of kilobytes instead of an absolute number of bytes. If a
5877 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5878 kilobyte. This means that much larger values can be stored.
5880 8. Exim monitor: an attempt to get the action menu when not actually pointing
5881 at a message produces an empty menu entitled "No message selected". This
5882 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5883 no entries in it ("Shell widget menu has zero width and/or height"). So I
5884 have added a single, blank menu entry in this case.
5886 9. Added ${quote_local_part.
5888 10. MIME decoding is now applied to the contents of Subject: header lines when
5891 11. Now that a reference to $sender_host_address automatically causes a reverse
5892 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5893 host lookup before query-style lookups in lists that might use this
5894 variable. This has therefore been abolished, and the "net-" prefix is no
5895 longer necessary for query-style lookups.
5897 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5898 have been a typo for LFLAGS, so it has been changed.
5900 13. The install script calls Exim with "-C /dev/null" in order to find the
5901 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5902 to be output. However, since Exim outputs its version number before the
5903 error, it didn't break the script. It just looked ugly. I fixed this by
5904 always allowing "-C /dev/null" if the caller is root.
5906 14. Ignore overlarge ACL variable number when reading spool file - insurance
5907 against a later release with more variables having written the file.
5909 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5910 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5911 this, as well as the form without the "IPv6" on the front.
5913 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5914 OS/Makefile-Darwin file.
5916 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5917 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5919 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5920 variable. However, some OS use ints for inodes. I've added cast to long int
5921 to get rid of the compiler warning.
5923 19. I had forgotten to lock out "/../" in configuration file names when
5924 ALT_CONFIG_PREFIX was set.
5926 20. Routers used for verification do not need to specify transports. However,
5927 if such a router generated a host list, and callout was configured, Exim
5928 crashed, because it could not find a port number from the (non-existent)
5929 transport. It now assumes port 25 in this circumstance.
5931 21. Added the -t option to exigrep.
5933 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5934 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5935 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5936 them is set, LOOKUP_LSEARCH is forced.
5938 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5940 24. Added sender and host information to the "rejected by local_scan()" log
5941 line; previously there was no indication of these.
5943 25. Added .include_if_exists.
5945 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5946 Linux. It turns out that not all file systems support this. Apparently some
5947 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5948 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5949 not supported on the file descriptor, is now ignored when Exim is trying to
5950 sync a directory. This applies only to Linux.
5952 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5954 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5955 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5958 29. Added support for maildirsize files from supplied patch (modified a bit).
5960 30. The use of :fail: followed by an empty string could lead Exim to respond to
5961 sender verification failures with (e.g.):
5963 550 Verification failed for <xxx>
5964 550 Sender verify failed
5966 where the first response line was missing the '-' that indicates it is not
5967 the final line of the response.
5969 31. The loop for finding the name of the user that called Exim had a hardwired
5970 limit of 10; it now uses the value of finduser_retries, which is used for
5971 all other user lookups.
5973 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5976 33. Exim was neglecting to zero errno before one call of strtol() when
5977 expanding a string and expecting an integer value. On some systems this
5978 resulted in spurious "integer overflow" errors. Also, it was casting the
5979 result into an int without checking.
5981 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5982 did not work. The code looks as if it has *never* worked, though it appears
5983 to have been documented since at least release 1.62. I have made it work.
5985 35. The "timeout_DNS" error in retry rules, also documented since at least
5986 1.62, also never worked. As it isn't clear exactly what this means, and
5987 clearly it isn't a major issue, I have abolished the feature by treating it
5988 as "timeout", and writing a warning to the main and panic logs.
5990 36. The display of retry rules for -brt wasn't always showing the error code
5993 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5994 timeout_connect_A, timeout_connect_MX.
5996 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5997 to the empty sender.
5999 39. The daemon was not analysing the content of -oX till after it had closed
6000 stderr and disconnected from the controlling terminal. This meant that any
6001 syntax errors were only noted on the panic log, and the return code from
6002 the command was 0. By re-arranging the code a little, I've made the
6003 decoding happen first, so such errors now appear on stderr, and the return
6004 code is 1. However, the actual setting up of the sockets still happens in
6005 the disconnected process, so errors there are still only recorded on the
6008 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6009 connections (as happens on some IP stacks) was logged at start up time as
6010 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6011 it from "IPv6 and IPv4", which means that two separate sockets are being
6014 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6015 says whether AF_INET or AF_INET6 was passed as an argument.
6017 42. Exiwhat output was messed up when time zones were included in log
6020 43. Exiwhat now gives more information about the daemon's listening ports,
6021 and whether -tls-on-connect was used.
6023 44. The "port" option of the smtp transport is now expanded.
6025 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6026 silently ignored. Now an error message is written to the main and panic
6029 46. There's a new ACL modifier called "logwrite" which writes to a log file
6030 as soon as it is encountered.
6032 47. Added $local_user_uid and $local_user_gid at routing time.
6034 48. Exim crashed when trying to verify a sender address that was being
6037 49. Exim was recognizing only a space character after ".include". It now also
6038 recognizes a tab character.
6040 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6041 extracting the relevant information from the specification. The man page no
6042 longer contains scrambled data for the -d option, and I've added a section
6043 at the front about calling Exim under different names.
6045 51. Added "extra_headers" argument to the "mail" command in filter files.
6047 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6050 53. Installed eximstats 1.29.
6052 54. Added transport_filter_timeout as a generic transport option.
6054 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6055 Cc: header lines. This was required by RFC 822, but it not required by RFC
6058 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6059 incoming messages that did not have them. Now it does so only if the
6060 message originates locally, that is, if there is no associated remote host
6061 address. When Resent- header lines are present, this applies to the Resent-
6062 lines rather than the non-Resent- lines.
6064 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6065 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6067 58. Messages for configuration errors now include the name of the main
6068 configuration file - useful now that there may be more than one file in a
6069 list (.included file names were always shown).
6071 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6072 for those rare installations that do not start the daemon as root or run it
6073 setuid root. I've cut out the call to initgroups() if the daemon is not
6076 60. The Exim user and group can now be bound into the binary as text strings
6077 that are looked up at the start of Exim's processing.
6079 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6081 62. Added $mailstore_basename variable.
6083 63. Installed patch to sieve.c from Michael Haardt.
6085 64. When Exim failed to open the panic log after failing to open the main log,
6086 the original message it was trying to log was written to stderr and debug
6087 output, but if they were not available (the usual case in production), it
6088 was lost. Now it is written to syslog before the two lines that record the
6089 failures to open the logs.
6091 65. Users' Exim filters run in subprocesses under the user's uid. It is
6092 possible for a "deliver" command or an alias in a "personal" command to
6093 provoke an address rewrite. If logging of address rewriting is configured,
6094 this fails because the process is not running as root or exim. There may be
6095 a better way of dealing with this, but for the moment (because 4.30 needs
6096 to be released), I have disabled address rewrite logging when running a
6097 filter in a non-root, non-exim process.
6103 1. The buildconfig auxiliary program wasn't quoting the value set for
6104 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6105 not defined. This bug was masked in 4.22 by the effect that was fixed in
6108 2. Some messages that were rejected after a message id was allocated were
6109 shown as "incomplete" by exigrep. It no longer does this for messages that
6110 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6112 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6113 have allow_domain_literals set, the ID did not get logged in the <= line.
6114 Domain literals are now always recognized in Message-ID: header lines.
6116 4. The first argument for a ${extract expansion item is the key name or field
6117 number. Leading and trailing spaces in this item were not being ignored,
6118 causing some misleading effects.
6120 5. When deliver_drop_privilege was set, single queue runner processes started
6121 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6122 same command in the process it spins off) were not dropping privilege.
6124 6. When the daemon running as "exim" started a queue runner, it always
6125 re-executed Exim in the spun-off process. This is a waste of effort when
6126 deliver_drop_privilege is set. The new process now just calls the
6127 queue-runner function directly.
6133 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6136 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6137 ignored. Though the use of -oP was forcing the writing of a pid file, it
6138 was always written to the default place.
6140 3. If the message "no IP address found for host xxxx" is generated during
6141 incoming verification, it is now followed by identification of the incoming
6142 connection (so you can more easily find what provoked it).
6144 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6146 5. Added some features to "harden" Exim a bit more against certain attacks:
6148 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6149 be put in Local/Makefile. This is like the never_users runtime option,
6150 but it cannot be overridden. The default setting is "root".
6152 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6153 prefix string with which any file named in a -C command line option
6156 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6157 is retained for -C and -D only if the caller of Exim is root. Without
6158 it, the exim user may also use -C and -D and retain privilege.
6160 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6161 command line option is disabled.
6163 6. Macro names set by the -D option must start with an upper case letter, just
6164 like macro names defined in the configuration file.
6166 7. Added "dereference=" facility to LDAP.
6168 8. Two instances of the typo "uknown" in the source files are fixed.
6170 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6171 the Configure-Makefile script screwed up while processing it.
6173 10. Incorporated PCRE 4.4.
6175 11. The SMTP synchronization check was not operating right at the start of an
6176 SMTP session. For example, it could not catch a HELO sent before the client
6177 waited for the greeting. There is now a check for outstanding input at the
6178 point when the greeting is written. Because of the duplex, asynchronous
6179 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6180 way, but not yet received, when the check is performed.
6182 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6183 on TCP/IP sockets, because this apparently causes some broken clients to
6186 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6187 unchanged) from the Cygwin maintainer.
6189 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6190 was supported instead of testing for mbx. Effectively a typo.
6192 15. The spa authenticator server code was not checking that the input it
6193 received was valid base64.
6195 16. The debug output line for the "set" modifier in ACLs was not showing the
6196 name of the variable that was being set.
6198 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6200 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6201 lookup on its own. Something else was needed to trigger the lookup. For
6202 example, a match in host_lookup or the need for a host name in a host list.
6203 Now, if $sender_host_name is referenced and the host name has not yet been
6204 looked up, a lookup is performed. If the lookup fails, the variable remains
6205 empty, and $host_lookup_failed is set to "1".
6207 19. Added "eqi" as a case-independent comparison operator.
6209 20. The saslauthd authentication condition could segfault if neither service
6210 nor realm was specified.
6212 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6213 error message that was logged was misleading, and incoming SMTP
6214 connections were dropped. The message is now more accurate, and temporary
6215 errors are given to SMTP connections.
6217 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6218 (except RSET) with a 421 error, until QUIT is received. However, it was
6219 failing to send a response to QUIT.
6221 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6222 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6223 ACL is now run after the helo_try_verify_hosts code.
6225 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6226 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6227 case-independent, so other case variants are also recognized). Apparently
6228 some systems use these upper case variants.
6230 25. If more than two messages were waiting for the same host, and a transport
6231 filter was specified for the transport, Exim sent two messages over the
6232 same TCP/IP connection, and then failed with "socket operation on non-
6233 socket" when it tried to send the third.
6235 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6237 27. The extern definition of crypt16() in expand.c was not being excluded when
6238 the OS had its own crypt16() function.
6240 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6241 as a preferred synonym for return_size_limit, both as an option and as an
6244 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6246 30. Changed the default configuration ACL to relax the local part checking rule
6247 for addresses that are not in any local domains. For these addresses,
6248 slashes and pipe symbols are allowed within local parts, but the sequence
6249 /../ is explicitly forbidden.
6251 31. SPA server authentication was not clearing the challenge buffer before
6254 32. log_message in a "warn" ACL statement was writing to the reject log as
6255 well as to the main log, which contradicts the documentation and doesn't
6256 seem right (because no rejection is happening). So I have stopped it.
6258 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6259 However, I am unable to do any testing of this.
6261 34. Fixed an infelicity in the appendfile transport. When checking directories
6262 for a mailbox, to see if any needed to be created, it was accidentally
6263 using path names with one or more superfluous leading slashes; tracing
6264 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6266 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6267 contents are added to the log line that is written for every discarded
6268 recipient. (Previously a log_message setting was ignored.)
6270 36. The ${quote: operator now quotes the string if it is empty.
6272 37. The install script runs exim in order to find its version number. If for
6273 some reason other than non-existence or emptiness, which it checks, it
6274 could not run './exim', it was installing it with an empty version number,
6275 i.e. as "exim-". This error state is now caught, and the installation is
6278 38. An argument was missing from the function that creates an error message
6279 when Exim fails to connect to the socket for saslauthd authentication.
6280 This could cause Exim to crash, or give a corrupted message.
6282 39. Added isip, isip4, and isip6 to ${if conditions.
6284 40. The ACL variables $acl_xx are now saved with the message, and can be
6285 accessed later in routers, transports, and filters.
6287 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6288 strings in the file are not string-expanded.
6290 42. If a MAIL command specified a SIZE value that was too large to fit into an
6291 int variable, the check against message_size_limit failed. Such values are
6292 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6293 day this will have to be increased, but I don't think I want to be around
6294 when emails are that large.
6301 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6302 iconv() is not standard in FreeBSD.
6304 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6305 IPv6 enabled. The observed symptom was a segmentation fault on return from
6306 the function os_common_find_running_interfaces() in src/os.c.
6308 3. In the check_special_case() function in daemon.c I had used "errno" as an
6309 argument name, which causes warnings on some systems. This was basically a
6310 typo, since it was named "eno" in the comments!
6312 4. The code that waits for the clock to tick (at a resolution of some fraction
6313 of a second) so as to ensure message-id uniqueness was always waiting for
6314 at least one whole tick, when it could have waited for less. [This is
6315 almost certainly not relevant at current processor speeds, where it is
6316 unlikely to ever wait at all. But we try to future-proof.]
6318 5. The function that sleeps for a time interval that includes fractions of a
6319 second contained a race. It did not block SIGALRM between setting the
6320 timer, and suspending (a couple of lines later). If the interval was short
6321 and the sigsuspend() was delayed until after it had expired, the suspension
6322 never ended. On busy systems this could lead to processes getting stuck for
6325 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6326 process, before it forks any delivery processes. The open lookup caching
6327 mechanism meant that the open file or database connection was passed into
6328 the delivery process. The problem was that delivery processes always tidy
6329 up cached lookup data. This could cause a problem for the next delivery
6330 process started by the queue runner, because the external queue runner
6331 process does not know about the closure. So the next delivery process
6332 still has data in the lookup cache. In the case of a file lookup, there was
6333 no problem because closing a file descriptor in a subprocess doesn't affect
6334 the parent. However, if the lookup was caching a connection to a database,
6335 the connection was closed, and the second delivery process was likely to
6336 see errors such as "PGSQL: query failed: server closed the connection
6337 unexpectedly". The problem has been fixed by closing all cached lookups
6338 in a queue runner before running a delivery process.
6340 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6341 seem to have the "const" qualifier which it has on other OS. I've
6344 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6345 *of the same type* (client or server) with the same public name that an
6346 error should be diagnosed.
6348 9. When Exim looked up a host name for an IP address, but failed to find the
6349 original IP address when looking up the host name (a safety check), it
6350 output the message "<ip address> does not match any IP for NULL", which was
6351 confusing, to say the least. The bug was that the host name should have
6352 appeared instead of "NULL".
6354 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6355 user that is built into the binary, and the -C or -D options is used, root
6356 privilege is dropped before the configuration file is read. In addition,
6357 logging is switched to stderr instead of the normal log files. If the
6358 configuration then re-defines the Exim user, the unprivileged environment
6359 is probably not what is expected, so Exim logs a panic warning message (but
6362 However, if deliver_drop_privilege is set, the unprivileged state may well
6363 be exactly what is intended, so the warning has been cut out in that case,
6364 and Exim is allowed to try to write to its normal log files.
6370 1. smtp_return_error_details was not giving details for temporary sender
6371 or receiver verification errors.
6373 2. Diagnose a configuration error if two authenticators have the same public
6376 3. Exim used not to create the message log file for a message until the first
6377 delivery attempt. This could be confusing when incoming messages were held
6378 for policy or load reasons. The message log file is now created at the time
6379 the message is received, and an initial "Received" line is written to it.
6381 4. The automatically generated man page for command line options had a minor
6382 bug that caused no ill effects; however, a more serious problem was that
6383 the procedure for building the man page automatically didn't always
6384 operate. Consequently, release 4.20 contains an out-of-date version. This
6385 shouldn't happen again.
6387 5. When building Exim with embedded Perl support, the script that builds the
6388 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6389 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6391 6. The freeze_tell option was not being used for messages that were frozen on
6392 arrival, either by an ACL or by local_scan().
6394 7. Added the smtp_incomplete_transaction log selector.
6396 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6397 was accepting AUTH without a new EHLO.
6399 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6400 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6403 10. Logging of TCP/IP connections (when configured) now happens in the main
6404 daemon process instead of the child process, so that the TCP/IP connection
6405 count is more accurate (but it can never be perfect).
6407 11. The use of "drop" in a nested ACL was not being handled correctly in the
6408 outer ACL. Now, if condition failure induced by the nested "drop" causes
6409 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6410 or "require"), the connection is dropped.
6412 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6413 that yield "discard" can now be used with an "accept" or a "discard" verb,
6414 but an error is generated for any others (because I can't see a useful way
6415 to define what should happen).
6417 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6418 are now processed in the same way as lines in the Exim configuration file.
6419 In particular, continuation lines are supported.
6421 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6423 15. Added -ti meaning -t -i.
6425 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6426 domains, and warn by logging if others are found.
6428 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6429 returned from GIFCONF when Exim is trying to find the list of interfaces on
6430 a host. The code in os.c has been modified to copy each ifreq to an aligned
6431 structure in all cases.
6433 Also, in some cases, the returned ifreq's were being copied to a 'struct
6434 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6435 means the last couple of bytes of an IPv6 address could be chopped if the
6436 ifreq contained only a normal sockaddr (14 bytes storage).
6438 18. Named domain lists were not supported in the hosts_treat_as_local option.
6439 An entry such as +xxxx was not recognized, and was treated as a literal
6442 19. Ensure that header lines added by a DATA ACL are included in the reject log
6443 if the ACL subsequently rejects the message.
6445 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6446 MD5 (which is deprecated).
6448 21. When testing a filter file using -bf, Exim was writing a message when it
6449 took the sender from a "From " line in the message, but it was not doing so
6450 when it took $return_path from a Return-Path: header line. It now does.
6452 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6453 with a valid header line field name (a series of printing characters
6454 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6456 23. Changed "disc" in the source to "disk" to conform to the documentation and
6457 the book and for uniformity.
6459 24. Ignore Sendmail's -Ooption=value command line item.
6461 25. When execve() failed while trying to run a command in a pipe transport,
6462 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6463 could be confused with a return value of 69 from the command itself. This
6464 has been changed to 127, the value the shell returns if it is asked to run
6465 a non-existent command. The wording for the related log line suggests a
6466 non-existent command as the problem.
6468 26. If received_header_text expands to an empty string, do not add a Received:
6469 header line to the message. (Well, it adds a token one on the spool, but
6470 marks it "old" so that it doesn't get used or transmitted.)
6472 27. Installed eximstats 1.28 (addition of -nt option).
6474 28. There was no check for failure on the call to getsockname() in the daemon
6475 code. This can fail if there is a shortage of resources on the system, with
6476 ENOMEM, for example. A temporary error is now given on failure.
6478 29. Contrary to the C standard, it seems that in some environments, the
6479 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6480 program. Exim now does this explicitly; it affects the formatting of
6481 timestamps using strftime().
6483 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6484 complaints. I've now initialized all the variables, to avoid this.
6486 32. Header lines added by a system filter were not being "seen" during
6487 transport-time rewrites.
6489 33. The info_callback() function passed to OpenSSL is set up with type void
6490 (*)(SSL *, int, int), as described somewhere. However, when calling the
6491 function (actually a macro) that sets it up, the type void(*)() is
6492 expected. I've put in a cast to prevent warnings from picky compilers.
6494 34. If a DNS black list lookup found a CNAME record, but there were no A
6495 records associated with the domain it pointed at, Exim crashed.
6497 35. If a DNS black list lookup returned more than one A record, Exim ignored
6498 all but the first. It now scans all returned addresses if a particular IP
6499 value is being sought. In this situation, the contents of the
6500 $dnslist_value variable are a list of all the addresses, separated by a
6503 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6504 to accept a host name and all its aliases if the forward lookup for any of
6505 them yielded the IP address of the incoming connection. Now it accepts only
6506 those names whose forward lookup yields the correct IP address. Any other
6507 names are discarded. This closes a loophole whereby a rogue DNS
6508 administrator could create reverse DNS records to break through a
6509 wildcarded host restriction in an ACL.
6511 37. If a user filter or a system filter that ran in a subprocess used any of
6512 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6513 the wrong values were passed to the pipe command ($thisaddress had the
6514 value of $0, $0 had the value of $1, etc). This bug was introduced by
6515 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6517 38. Improved the line breaking for long SMTP error messages from ACLs.
6518 Previously, if there was no break point between 40 and 75 characters, Exim
6519 left the rest of the message alone. Two changes have been made: (a) I've
6520 reduced the minimum length to 35 characters; (b) if it can't find a break
6521 point between 35 and 75 characters, it looks ahead and uses the first one
6522 that it finds. This may give the occasional overlong line, but at least the
6523 remaining text gets split now.
6525 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6526 file descriptors might be low, and that setting 1000 would always raise it.
6527 It turns out that in some environments, the limit is already over 1000 and
6528 that lowering it causes trouble. So now Exim takes care not to decrease it.
6530 40. When delivering a message, the value of $return_path is set to $sender_
6531 address at the start of routing (routers may change the value). By an
6532 oversight, this default was not being set up when an address was tested by
6533 -bt or -bv, which affected the outcome if any router or filter referred to
6536 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6537 log only when "message" or "log_message" are set. However, if one of the
6538 conditions was an address verification, or a call to a nested ACL, the
6539 messages generated by the underlying test were being passed through. This
6540 no longer happens. The underlying message is available in $acl_verify_
6541 message for both "message" and "log_message" expansions, so it can be
6542 passed through if needed.
6544 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6545 new expansion $bh_ to give the encoded byte string without charset
6546 translation. Translation happens only if iconv() is available; HAVE_ICONV
6547 indicates this at build time. HEADERS_CHARSET gives the charset to
6548 translate to; headers_charset can change it in the configuration, and
6549 "headers charset" can change it in an individual filter file.
6551 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6552 that creates RFC 2047 encoded "words" labels them as that charset instead
6553 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6554 expansion operator; (ii) when Exim creates a From: line for a local
6555 message; (iii) when a header line is rewritten to include a "phrase" part.
6557 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6558 buggy, causing it to skip the first lines of messages whose message ID
6559 ended in 'D'. This would not have bitten before Exim release 4.14, because
6560 message IDs were unlikely to end in 'D' before then. The effect was to have
6561 incorrect size information for certain domains.
6563 45. #include "config.h" was missing at the start of the crypt16.c module. This
6564 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6567 46. If there was a timeout during a "random" callout check, Exim treated it as
6568 a failure of the random address, and carried on sending RSET and the real
6569 address. If the delay was just some slowness somewhere, the response to the
6570 original RCPT would be taken as a response to RSET and so on, causing
6571 mayhem of various kinds.
6573 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6574 when I implemented it. It didn't allow for the fact that some option values
6575 may legitimately be negative (e.g. size_addition), and it didn't even do
6576 the right test for positive values.
6578 48. Domain names in DNS records are case-independent. Exim always looks them up
6579 in lower case. Some resolvers return domain names in exactly the case they
6580 appear in the zone file, that is, they may contain uppercase letters. Not
6581 all resolvers do this - some return always lower case. Exim was treating a
6582 change of case by a resolver as a change of domain, similar to a widening
6583 of a domain abbreviation. This triggered its re-routing code and so it was
6584 trying to route what was effectively the same domain again. This normally
6585 caused routing to fail (because the router wouldn't handle the domain
6586 twice). Now Exim checks for this case specially, and just changes the
6587 casing of the domain that it ultimately uses when it transmits the message
6590 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6593 50. If a filter generated a file delivery with a non-absolute name (possible if
6594 no home directory exists for the router), the forbid_file option was not
6597 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6598 the existing equality matching.
6600 52. Exim was using ints instead of ino_t variables in some places where it was
6601 dealing with inode numbers.
6603 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6604 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6605 called TMPDIR, and if it finds it is different, it changes its value.
6607 54. The smtp_printf() function is now made available to local_scan() so
6608 additional output lines can be written before returning. There is also an
6609 smtp_fflush() function to enable the detection of a dropped connection.
6610 The variables smtp_input and smtp_batched_input are exported to
6613 55. Changed the default runtime configuration: the message "Unknown user"
6614 has been removed from the ACL, and instead placed on the localuser router,
6615 using the cannot_route_message feature. This means that any verification
6616 failures that generate their own messages won't get overridden. Similarly,
6617 the "Unrouteable address" message that was in the ACL for unverifiable
6618 relay addresses has also been removed.
6620 56. Added hosts_avoid_esmtp to the smtp transport.
6622 57. The exicyclog script was not checking for the esoteric option
6623 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6624 will work only if exicyclog is run under the appropriate euid.
6626 58. Following a discussion on the list, the rules by which Exim recognises line
6627 endings on incoming messages have been changed. The -dropcr and drop_cr
6628 options are now no-ops, retained only for backwards compatibility. The
6629 following line terminators are recognized: LF CRLF CR. However, special
6630 processing applies to CR:
6632 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6633 nor a local message in the state where . is a terminator.
6635 (ii) If a bare CR is encountered in a header line, an extra space is added
6636 after the line terminator so as not to end the header. The reasoning
6637 behind this is that bare CRs in header lines are most likely either
6638 to be mistakes, or people trying to play silly games.
6640 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6641 was being incorrectly given as 18 bytes larger than it should have been.
6642 This is a VOB (very old bug).
6644 60. This may never have affected anything current, but just in case it has:
6645 When the local host is found other than at the start of a list of hosts,
6646 the local host, those with the same MX, and any that follow, are discarded.
6647 When the list in question was part of a longer list of hosts, the following
6648 hosts (not currently being processed) were also being discarded. This no
6649 longer happens. I'm not sure if this situation could ever has previously
6652 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6655 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6656 header. This is something that is recommended in a new Internet Draft, and
6657 is something that is documented as being done by Sendmail. There are two
6658 possible values. For messages generated by the autoreply transport, Exim
6661 Auto-Submitted: auto-replied
6663 whereas for all other generated messages (e.g. bounces) it adds
6665 Auto-Submitted: auto-generated
6667 63. The "personal" condition in filters now includes a test for the
6668 Auto-Submitted: header. If it contains the string "auto-" the message it
6669 not considered personal.
6671 64. Added rcpt_include_affixes as a generic transport option.
6673 65. Added queue_only_override (default true).
6675 66. Added the syslog_duplication option.
6677 67. If what should have been the first header line of a message consisted of
6678 a space followed by a colon, Exim was mis-interpreting it as a header line.
6679 It isn't of course - it is syntactically invalid and should therefore be
6680 treated as the start of the message body. The misbehaviour could have
6681 caused a number of strange effects, including loss of data in subsequent
6682 header lines, and spool format errors.
6684 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6685 client host had authenticated. This control can now be exercised by an ACL
6686 for more flexibility.
6688 69. By default, callouts do not happen when testing with -bh. There is now a
6689 variant, -bhc, which does actually run the callout code, including
6690 consulting and updating the callout cache.
6692 70. Added support for saslauthd authentication, courtesy of Alexander
6695 71. If statvfs() failed on the spool or log directories while checking their
6696 size for availability, Exim confusingly gave the error "space shortage".
6697 Furthermore, in debugging mode it crashed with a floating point exception.
6698 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6699 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6700 serious problem, Exim now writes to the main and panic logs when this
6701 happens, with details of the failure. It then refuses to accept the
6702 incoming message, giving the message "spool directory problem" or "log
6703 directory problem" with a 421 code for SMTP messages.
6705 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6706 0, 1, and 2 exist, because some OS complain for execs without them (see
6707 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6708 descriptors. However, the code omitted to check that the open succeeded,
6709 causing mysterious errors if for some reason the permissions on /dev/null
6710 got screwed. Now Exim writes a message to the main and panic logs, and
6711 bombs out if it can't open /dev/null.
6713 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6714 interact so that it is all more flexible. It is supposed to remain
6715 backwards compatible. Also added extra_local_interfaces.
6717 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6718 to bomb out with an assertion failure - to the client this appears as a
6719 connection drop. This problem occurs in the part of the code that was taken
6720 from the Samba project. Fortunately, the assertion is in a very simple
6721 function, so I have fixed this by reproducing the function inline in the
6722 one place where it is called, and arranging for authentication to fail
6723 instead of killing the process with assert().
6725 75. The SPA client code was not working when the server requested OEM rather
6726 than Unicode encoding.
6728 76. Added code to make require_files with a specific uid setting more usable in
6729 the case where statting the file as root fails - usually a non-root-mounted
6730 NFS file system. When this happens and the failure is EACCES, Exim now
6731 forks a subprocess and does the per-uid checking as the relevant uid.
6733 77. Added process_log_path.
6735 78. If log_file_path was not explicitly set, a setting of check_log_space or
6736 check_log_inodes was ignored.
6738 79. If a space check for the spool or log partitions fails, the incident is now
6739 logged. Of course, in the latter case the data may get lost...
6741 80. Added the %p formatting code to string_format() so that it can be used to
6742 print addresses in debug_print(). Adjusted all the address printing in the
6743 debugging in store.c to use %p rather than %d.
6745 81. There was a concern that a line of code in smtp_in.c could overflow a
6746 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6747 initially expressed, the concern was not well-founded, because trailing
6748 spaces are removed early. However, if the trailing spaces were followed by
6749 a NULL, they did not get removed, so the overflow was possible. Two fixes
6752 (a) I re-wrote the offending code in a cleaner fashion.
6753 (b) If an incoming SMTP command contains a NULL character, it is rejected
6756 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6757 runs initgroups(), so that if the Exim user is in any additional groups,
6758 they will be used during message reception.
6764 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob