1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Rework error string handling in TLS interface so that the caller in
12 more cases is responsible for logging. This permits library-sourced
13 string to be attached to addresses during delivery, and collapses
14 pairs of long lines into single ones.
16 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
17 during configuration. Wildcards are allowed and expanded.
19 JH/02 Rework error string handling in DKIM to pass more info back to callers.
20 This permits better logging.
22 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
23 do not close it down and have the child transport start it up again on
24 the passed-on TCP connection. Instead, proxy the child (and any
25 subsequent ones) for TLS via a unix-domain socket channel. Logging is
26 affected: the continued delivery log lines do not have any DNSSEC, TLS
27 cipher, Certificate or OCSP information.
29 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
30 identical IP addresses on different listening ports. Will also affect
33 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
34 add noisy ifdef guards to special-case this sillyness.
35 Patch from Bernd Kuhls.
41 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
42 than -2003 did; needs libidn2 in addition to libidn.
44 JH/02 The path option on a pipe transport is now expanded before use.
46 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
47 Patch provided by "Björn", documentation fix added too.
49 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
50 missing a wire-to-host endian conversion.
52 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
53 close after a BDAT command line could be taken as a following command,
54 giving a synch failure. Fix by only checking for synch immediately
55 before acknowledging the chunk.
57 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
58 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
59 macro. Patches provided by Josh Soref.
61 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
62 Previously we did not; the RFC seems ambiguous and VRFY is not listed
63 by IANA as a service extension. However, John Klensin suggests that we
66 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
67 the dkim code may be unix-mode line endings rather than smtp wire-format
68 CRLF, so prepend a CR to any bare LF.
70 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
71 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
73 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
74 the first were themselves being wrongly included in the feed into dkim
75 processing; with most chunk sizes in use this resulted in an incorrect
76 body hash calculated value.
78 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
79 DKIM signature block, for verification. Although advised against by
80 standards it is specifically not ruled illegal.
82 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
84 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
85 missing a body hash (the bh= tag).
87 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
88 It seems that HAProxy sends the Proxy Protocol information in clear and
89 only then does a TLS startup, so do the same.
91 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
92 TCP connections (such as for Spamd) unless the daemon successfully set
93 Fast Open mode on its listening sockets. This fixes breakage seen on
94 too-old kernels or those not configured for Fast Open, at the cost of
95 requiring both directions being enabled for TFO, and TFO never being used
96 by non-daemon-related Exim processes.
98 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
99 endings, at least on the first header line. Try to canonify any that get
100 past that check, despite the cost.
102 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
103 now limited to an arbitrary five deep, while parsing addresses with the
104 strip_excess_angle_brackets option enabled.
106 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
107 instead leave the unprompted TLS handshake in socket buffer for the
108 TLS library to consume.
110 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
112 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
114 JH/16 Drop variables when they go out of scope. Memory management drops a whole
115 region in one operation, for speed, and this leaves assigned pointers
116 dangling. Add checks run only under the testsuite which checks all
117 variables at a store-reset and panics on a dangling pointer; add code
118 explicitly nulling out all the variables discovered. Fixes one known
119 bug: a transport crash, where a dangling pointer for $sending_ip_address
120 originally assigned in a verify callout, is re-used.
122 PP/06 Drop '.' from @INC in various Perl scripts.
124 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
126 PP/08 Reduce a number of compilation warnings under clang; building with
127 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
128 should be warning-free.
130 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
132 HS/01 Fix portability problems introduced by PP/08 for platforms where
133 realloc(NULL) is not equivalent to malloc() [SunOS et al].
135 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
136 chunk. This allows us to accept broken chunked messages. We need a more
137 general solution here.
139 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
140 already-broken messages in the queue.
142 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
144 JH/19 Fix reference counting bug in routing-generated-address tracking.
150 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
151 supports it and a size is available (ie. the sending peer gave us one).
153 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
154 years of being deprecated). The replacements are the ACLs
155 acl_smtp_mime and acl_not_smtp_mime.
157 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
158 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
159 or even an in-clear connection were permitted. Now, if the host lookup
160 was dnssec and dane was requested then the host is only used if the
161 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
162 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
163 if one fails this test.
164 This means that a poorly-configured remote DNS will make it incommunicado;
165 but it protects against a DNS-interception attack on it.
167 JH/04 Bug 1810: make continued-use of an open smtp transport connection
168 non-noisy when a race steals the message being considered.
170 JH/05 If main configuration option tls_certificate is unset, generate a
171 self-signed certificate for inbound TLS connections.
173 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
174 in rewrites and routers.
176 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
177 and logged a warning sing 4.83; now they are a configuration file error.
179 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
180 (lacking @domain). Apply the same qualification processing as RCPT.
182 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
184 JH/10 Support ${sha256:} applied to a string (as well as the previous
187 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
188 a cutthrough deliver is pending, as we always want to make a connection.
189 This also avoids re-routing the message when later placing the cutthrough
190 connection after a verify cache hit.
191 Do not update it with the verify result either.
193 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
194 when routing results in more than one destination address.
196 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
197 signing (which inhibits the cutthrough capability). Previously only
198 the presence of an option was tested; now an expansion evaluating as
199 empty is permissible (obviously it should depend only on data available
200 when the cutthrough connection is made).
202 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
203 the relevant preceding SMTP command did not note the pipelining mode.
205 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
206 Previously they were not counted.
208 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
209 as one having no matching records. Previously we deferred the message
210 that needed the lookup.
212 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
213 distinguished as "(=".
215 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
216 for missing MX records. Previously it only worked for missing A records.
218 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
220 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
221 after the data-go-ahead and data-ack. Patch from Jason Betts.
223 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
224 even for a "none" policy. Patch from Tony Meyer.
226 JH/22 Fix continued use of a connection for further deliveries. If a port was
227 specified by a router, it must also match for the delivery to be
230 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
231 When one of the recipients of a message was unsuitable for the connection
232 (has no matching addresses), we lost track of needing to mark it
233 deferred. As a result mail would be lost.
235 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
237 JH/25 Decoding ACL controls is now done using a binary search; the source code
238 takes up less space and should be simpler to maintain. Merge the ACL
239 condition decode tables also, with similar effect.
241 JH/26 Fix problem with one_time used on a redirect router which returned the
242 parent address unchanged. A retry would see the parent address marked as
243 delivered, so not attempt the (identical) child. As a result mail would
246 JH/27 Fix a possible security hole, wherein a process operating with the Exim
247 UID can gain a root shell. Credit to http://www.halfdog.net/ for
248 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
251 JH/28 Enable {spool,log} filesystem space and inode checks as default.
252 Main config options check_{log,spool}_{inodes,space} are now
253 100 inodes, 10MB unless set otherwise in the configuration.
255 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
256 Previously it only applied to the main-section connection policy
259 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
261 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
262 by me. Added RFC7919 DH primes as an alternative.
264 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
265 are not in the system include path.
267 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
268 GnuTLS, when a session startup failed (eg because the client disconnected)
269 Exim did stdio operations after fclose. This was exposed by a recent
270 change which nulled out the file handle after the fclose.
272 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
273 signed directly by the cert-signing cert, rather than an intermediate
274 OCSP-signing cert. This is the model used by LetsEncrypt.
276 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
278 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
279 an incoming connection.
281 HS/02 Bug 1802: Do not half-close the connection after sending a request
284 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
285 fallback to "prime256v1".
287 JH/34 SECURITY: Use proper copy of DATA command in error message.
288 Could leak key material. Remotely exploitable. CVE-2016-9963.
294 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
295 and 3.4.4 - once the server is enabled to respond to an OCSP request
296 it does even when not requested, resulting in a stapling non-aware
297 client dropping the TLS connection.
299 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
300 support variable-length bit vectors. No functional change.
302 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
303 The I= interface field on outgoing lines is now after the H= remote
304 host field, same as incoming lines. There is a separate
305 outgoing_interface log selector which allows you to disable the
308 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
309 If not running log_selector +smtp_connection the mainlog would be held
310 open indefinitely after a "too many connections" event, including to a
311 deleted file after a log rotate. Leave the per net connection logging
312 leaving it open for efficiency as that will be quickly detected by the
313 check on the next write.
315 HS/01 Bug 1671: Fix post transport crash.
316 Processing the wait-<transport> messages could crash the delivery
317 process if the message IDs didn't exist for some reason. When
318 using 'split_spool_directory=yes' the construction of the spool
319 file name failed already, exposing the same netto behaviour.
321 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
322 mime_regex ACL conditions.
324 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
325 to DSN fail messages (bounces): remote IP, remote greeting, remote response
326 to HELO, local diagnostic string.
328 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
329 log line to debug. Even when configured with a tls authenticator many
330 client connections are expected to not authenticate in this way, so
331 an authenticate fail is not an error.
333 HS/02 Add the Exim version string to the process info. This way exiwhat
334 gives some more detail about the running daemon.
336 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
337 matter for fast-change records such as DNSBLs.
339 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
340 retry record, even if constant. There may be multiple transports with
341 different interface settings and the retry behaviour needs to be kept
344 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
346 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
348 JH/10 Bug 840: fix log_defer_output option of pipe transport
350 JH/11 Bug 830: use same host for all RCPTS of a message, even under
351 hosts_randomize. This matters a lot when combined with mua_wrapper.
353 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
354 ${quote_pgsql:<string>} operator.
356 JH/13 Bug 1708: avoid misaligned access in cached lookup.
358 JH/14 Change header file name for freeradius-client. Relevant if compiling
359 with Radius support; from the Gentoo tree and checked under Fedora.
361 JH/15 Bug 1712: Introduce $prdr_requested flag variable
363 JH/16 Bug 1714: Permit an empty string as expansion result for transport
364 option transport_filter, meaning no filtering.
366 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
368 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
369 defaults to "*" (all hosts). The variable is now available when not built
370 with TLS, default unset, mainly to enable keeping the testsuite sane.
371 If a server certificate is not supplied (via tls_certificate) an error is
372 logged, and clients will find TLS connections fail on startup. Presumably
373 they will retry in-clear.
374 Packagers of Exim are strongly encouraged to create a server certificate
375 at installation time.
377 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
378 with the $config_file variable.
380 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
381 in transport context, after the attempt, and per-recipient. The latter type
382 is per host attempted. The event data is the error message, and the errno
383 information encodes the lookup type (A vs. MX) used for the (first) host,
384 and the trailing two digits of the smtp 4xx response.
386 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
387 to write to mainlog (or rejectlog, paniclog) in the window between file
388 creation and permissions/ownership being changed. Particularly affects
389 installations where exicyclog is run as root, rather than exim user;
390 result is that the running daemon panics and dies.
392 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
394 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
395 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
396 "pri" and "weight". Note that the previous implicit priority given by the
397 list order is no longer honoured.
399 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
402 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
403 by defining SUPPORT_SOCKS.
405 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
406 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
407 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
408 variables are renamed to proxy_{local,external}_{address,port}.
410 JH/27 Move Internationalisation support from Experimental to mainline, enabled
411 for a build by defining SUPPORT_I18N
413 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
414 of the query string, and make ${quote_redis:} do that quoting.
416 JH/29 Move Events support from Experimental to mainline, enabled by default
417 and removable for a build by defining DISABLE_EVENT.
419 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
421 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
422 cached by the daemon.
424 JH/32 Move Redis support from Experimental to mainline, enabled for a build
425 by defining LOOKUP_REDIS. The libhiredis library is required.
427 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
428 keys are given for lookup.
430 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
431 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
432 only supported when built with TLS support. The PolarSSL SHA routines
433 are still used when the TLS library is too old for convenient support.
435 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
436 openssl_options), for security. OpenSSL forces this from version 1.1.0
437 server-side so match that on older versions.
439 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
440 allocation for $value could be released as the expansion processing
441 concluded, but leaving the global pointer active for it.
443 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
444 and to use the domains and local_parts ACL conditions.
446 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
447 incorrectly not doubled on cutthrough transmission, hence seen as a
448 body-termination at the receiving system - resulting in truncated mails.
449 Commonly the sender saw a TCP-level error, and retransmitted the message
450 via the normal store-and-forward channel. This could result in duplicates
451 received - but deduplicating mailstores were liable to retain only the
452 initial truncated version.
454 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
456 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
458 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
459 we're in there, support oversigning also; bug 1309.
461 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
463 HS/04 Add support for keep_environment and add_environment options.
465 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
466 either intentional arithmetic overflow during PRNG, or testing config-
469 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
470 delivery resulted in actual delivery. Cancel cutthrough before DATA
473 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
474 rejects a recipient: pass the reject to the originator.
476 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
477 Many were false-positives and ignorable, but it's worth fixing the
480 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
481 for the new environment-manipulation done at startup. Move the routines
482 from being local to tls.c to being global via the os.c file.
484 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
485 an extract embedded as result-arg for a map, the first arg for extract
486 is unavailable so we cannot tell if this is a numbered or keyed
487 extraction. Accept either.
493 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
496 JH/02 The smtp transport option "multi_domain" is now expanded.
498 JH/03 The smtp transport now requests PRDR by default, if the server offers
501 JH/04 Certificate name checking on server certificates, when exim is a client,
502 is now done by default. The transport option tls_verify_cert_hostnames
503 can be used to disable this per-host. The build option
504 EXPERIMENTAL_CERTNAMES is withdrawn.
506 JH/05 The value of the tls_verify_certificates smtp transport and main options
507 default to the word "system" to access the system default CA bundle.
508 For GnuTLS, only version 3.0.20 or later.
510 JH/06 Verification of the server certificate for a TLS connection is now tried
511 (but not required) by default. The verification status is now logged by
512 default, for both outbound TLS and client-certificate supplying inbound
515 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
518 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
519 Status Notification (bounce) messages are now MIME format per RFC 3464.
520 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
521 under the control of the dsn_advertise_hosts option, and routers may
522 have a dsn_lasthop option.
524 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
525 default, modifiable by a malware= option. The list separator for
526 the options can now be changed in the usual way. Bug 68.
528 JH/10 The smtp_receive_timeout main option is now expanded before use.
530 JH/11 The incoming_interface log option now also enables logging of the
531 local interface on delivery outgoing connections.
533 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
534 if the interface and destination host and port all match.
536 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
539 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
540 Patch from Andrew Lewis.
542 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
543 now supports optional time-restrictions, weighting, and priority
544 modifiers per server. Patch originally by <rommer@active.by>.
546 JH/16 The spamd_address main option now supports a mixed list of local
547 and remote servers. Remote servers can be IPv6 addresses, and
548 specify a port-range.
550 JH/17 Bug 68: The spamd_address main option now supports an optional
551 timeout value per server.
553 JH/18 Bug 1581: Router and transport options headers_add/remove can
554 now have the list separator specified.
556 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
559 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
562 JH/21 Support for the A6 type of dns record is withdrawn.
564 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
565 rather than the verbs used.
567 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
568 from 255 to 1024 chars.
570 JH/24 Verification callouts now attempt to use TLS by default.
572 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
573 are generic router options now. The defaults didn't change.
575 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
576 Original patch from Alexander Shikoff, worked over by JH.
578 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
579 files if ZCAT_COMMAND is not executable.
581 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
583 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
585 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
586 Normally benign, it bites when the pair was led to by a CNAME;
587 modern usage is to not canonicalize the domain to a CNAME target
588 (and we were inconsistent anyway for A-only vs AAAA+A).
590 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
592 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
593 when evaluating $sender_host_dnssec.
595 JH/31 Check the HELO verification lookup for DNSSEC, adding new
596 $sender_helo_dnssec variable.
598 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
600 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
602 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
604 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
605 documented as working, but never had. Support all but $spam_report.
607 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
608 added for tls authenticator.
610 HS/03 Add perl_taintmode main config option
616 TL/01 When running the test suite, the README says that variables such as
617 no_msglog_check are global and can be placed anywhere in a specific
618 test's script, however it was observed that placement needed to be near
619 the beginning for it to behave that way. Changed the runtest perl
620 script to read through the entire script once to detect and set these
621 variables, reset to the beginning of the script, and then run through
622 the script parsing/test process like normal.
624 TL/02 The BSD's have an arc4random API. One of the functions to induce
625 adding randomness was arc4random_stir(), but it has been removed in
626 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
627 function when detected.
629 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
630 cause callback expansion.
632 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
633 syntax errors in an expansion can be treated as a string instead of
634 logging or causing an error, due to the internal use of bool_lax
635 instead of bool when processing it.
637 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
638 server certificates when making smtp deliveries.
640 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
642 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
644 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
646 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
647 Merged patch from Sebastian Wiedenroth.
649 JH/05 Fix results-pipe from transport process. Several recipients, combined
650 with certificate use, exposed issues where response data items split
651 over buffer boundaries were not parsed properly. This eventually
652 resulted in duplicates being sent. This issue only became common enough
653 to notice due to the introduction of connection certificate information,
654 the item size being so much larger. Found and fixed by Wolfgang Breyha.
656 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
657 size buffer was used, resulting in syntax errors when an expansion
660 JH/07 Add support for directories of certificates when compiled with a GnuTLS
661 version 3.3.6 or later.
663 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
664 is EXPERIMENTAL_EVENT, the main-configuration and transport options
665 both become "event_action", the variables become $event_name, $event_data
666 and $event_defer_errno. There is a new variable $verify_mode, usable in
667 routers, transports and related events. The tls:cert event is now also
668 raised for inbound connections, if the main configuration event_action
671 TL/06 In test suite, disable OCSP for old versions of openssl which contained
672 early OCSP support, but no stapling (appears to be less than 1.0.0).
674 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
675 server certificate names available under the smtp transport option
676 "tls_verify_cert_hostname" now do not permit multi-component wildcard
679 JH/10 Time-related extraction expansions from certificates now use the main
680 option "timezone" setting for output formatting, and are consistent
681 between OpenSSL and GnuTLS compilations. Bug 1541.
683 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
684 encoded parameter in the incoming message. Bug 1558.
686 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
687 include certificate info, eximon was claiming there were spoolfile
690 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
692 JH/14 Log delivery-related information more consistently, using the sequence
693 "H=<name> [<ip>]" wherever possible.
695 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
696 are problematic for Debian distribution, omit them from the release
699 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
701 JH/16 Fix string representation of time values on 64bit time_t architectures.
704 JH/17 Fix a null-indirection in certextract expansions when a nondefault
705 output list separator was used.
710 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
711 checkers that were complaining about end of non-void function with no
714 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
715 This was a regression introduced in 4.83 by another bugfix.
717 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
719 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
720 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
726 TF/01 Correctly close the server side of TLS when forking for delivery.
728 When a message was received over SMTP with TLS, Exim failed to clear up
729 the incoming connection properly after forking off the child process to
730 deliver the message. In some situations the subsequent outgoing
731 delivery connection happened to have the same fd number as the incoming
732 connection previously had. Exim would try to use TLS and fail, logging
733 a "Bad file descriptor" error.
735 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
736 utilities have not been installed.
738 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
739 temporary space as the ACL may create new global variables.
741 TL/01 LDAP support uses per connection or global context settings, depending
742 upon the detected version of the libraries at build time.
744 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
745 to extract and use the src ip:port in logging and expansions as if it
746 were a direct connection from the outside internet. PPv2 support was
747 updated based on HAProxy spec change in May 2014.
749 JH/02 Add ${listextract {number}{list}{success}{fail}}.
751 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
752 Properly escape header and check for NULL return.
754 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
757 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
759 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
760 characters in header names, implemented as a verify condition.
761 Contributed by Michael Fischer v. Mollard.
763 TL/05 Rename SPF condition results err_perm and err_temp to standardized
764 results permerror and temperror. Previous values are deprecated but
765 still accepted. In a future release, err_perm and err_temp will be
766 completely removed, which will be a backward incompatibility if the
767 ACL tests for either of these two old results. Patch contributed by
768 user bes-internal on the mailing list.
770 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
772 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
773 selectors, in both main and reject logs.
775 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
778 JH/07 Add malware type "sock" for talking to simple daemon.
780 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
782 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
783 routers/transports under cutthrough routing.
785 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
786 numbers. Touch up "bool" conditional to keep the same definition.
788 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
790 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
792 JH/12 Expand items in router/transport headers_add or headers_remove lists
793 individually rather than the list as a whole. Bug 1452.
795 Required for reasonable handling of multiple headers_ options when
796 they may be empty; requires that headers_remove items with embedded
797 colons must have them doubled (or the list-separator changed).
799 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
800 view the policy declared in the DMARC record. Currently, $dmarc_status
801 is a combined value of both the record presence and the result of the
804 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
806 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
807 dnslookup router and the smtp transport (applying to the forward
810 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
811 of ldap servers used for a specific lookup. Patch provided by Heiko
814 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
815 New variable $lookup_dnssec_authenticated for observability.
817 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
818 Patch submitted by Lars Timman.
820 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
822 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
823 Requires trusted mode and valid format message id, aborts otherwise.
824 Patch contributed by Heiko Schlichting.
826 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
827 certextract with support for various fields. Bug 1358.
829 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
830 is requested by default, modifiable by smtp transport option
833 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
834 operate on certificate variables to give certificate fingerprints
835 Also new ${sha256:cert_variable}.
837 JH/23 The PRDR feature is moved from being Experimental into the mainline.
839 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
840 Christian Aistleitner.
842 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
844 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
845 file. Patch from Wolfgang Breyha.
847 JH/25 Expand the coverage of the delivery $host and $host_address to
848 client authenticators run in verify callout. Bug 1476.
850 JH/26 Port service names are now accepted for tls_on_connect_ports, to
851 align with daemon_smtp_ports. Bug 72.
853 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
854 support and error reporting did not work properly.
856 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
857 and is readable. Patch from Andrew Colin Kissa.
859 TL/14 Enhance documentation of ${run expansion and how it parses the
860 commandline after expansion, particularly in the case when an
861 unquoted variable expansion results in an empty value.
863 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
865 PP/02 Fix internal collision of T_APL on systems which support RFC3123
866 by renaming away from it. Addresses GH issue 15, reported by
869 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
871 TL/15 SECURITY: prevent double expansion in math comparison functions
872 (can expand unsanitized data). Not remotely exploitable.
879 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
881 PP/02 Make -n do something, by making it not do something.
882 When combined with -bP, the name of an option is not output.
884 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
887 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
888 $sender_host_name and config options to manage this, and basic check
891 PP/05 DSCP support for outbound connections and control modifier for inbound.
893 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
894 (Only plugin which currently uses this is kerberos4, which nobody should
895 be using, but we should make it available and other future plugins might
896 conceivably use it, even though it would break NAT; stuff *should* be
897 using channel bindings instead).
899 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
900 name; added for Sendmail compatibility; requires admin caller.
901 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
902 just ignore it); requires trusted caller.
903 Also parse but ignore: -Ac -Am -X<logfile>
906 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
908 TL/02 Add +smtp_confirmation as a default logging option.
910 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
911 Patch by Magnus Holmgren from 2007-02-20.
913 TL/04 Bugzilla 1281 - Spec typo.
914 Bugzilla 1283 - Spec typo.
915 Bugzilla 1290 - Spec grammar fixes.
917 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
919 TL/06 Add Experimental DMARC support using libopendmarc libraries.
921 TL/07 Fix an out of order global option causing a segfault. Reported to dev
922 mailing list by by Dmitry Isaikin.
924 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
926 JH/02 Support "G" suffix to numbers in ${if comparisons.
928 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
930 NM/01 Bugzilla 1197 - Spec typo
931 Bugzilla 1196 - Spec examples corrections
933 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
935 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
936 gnutls_enable_pkcs11, but renamed to more accurately indicate its
939 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
940 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
942 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
943 "acl {{name}{arg}...}", and optional args on acl condition
946 JH/05 Permit multiple router/transport headers_add/remove lines.
948 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
950 JH/07 Avoid using a waiting database for a single-message-only transport.
951 Performance patch from Paul Fisher. Bugzilla 1262.
953 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
956 JH/09 Add $headers_added variable, with content from use of ACL modifier
957 add_header (but not yet added to the message). Bugzilla 199.
959 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
960 Pulled from Bugzilla 817 by Wolfgang Breyha.
962 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
964 (nb: this is the same fix as in Exim 4.80.1)
966 JH/11 Add A= logging on delivery lines, and a client_set_id option on
969 JH/12 Add optional authenticated_sender logging to A= and a log_selector
972 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
974 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
975 advertise SMTP AUTH mechanism to us, instead of a generic
976 protocol violation error. Also, make Exim more robust to bad
977 data from the Dovecot auth socket.
979 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
981 When a queue runner is handling a message, Exim first routes the
982 recipient addresses, during which it prunes them based on the retry
983 hints database. After that it attempts to deliver the message to
984 any remaining recipients. It then updates the hints database using
987 So if a recipient address works intermittently, it can get repeatedly
988 deferred at routing time. The retry hints record remains fresh so the
989 address never reaches the final cutoff time.
991 This is a fairly common occurrence when a user is bumping up against
992 their storage quota. Exim had some logic in its local delivery code
993 to deal with this. However it did not apply to per-recipient defers
994 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
996 This change adds a proper retry rule check during routing so that the
997 final cutoff time is checked against the message's age. We only do
998 this check if there is an address retry record and there is not a
999 domain retry record; this implies that previous attempts to handle
1000 the address had the retry_use_local_parts option turned on. We use
1001 this as an approximation for the destination being like a local
1002 delivery, as in LMTP.
1004 I suspect this new check makes the old local delivery cutoff check
1005 redundant, but I have not verified this so I left the code in place.
1007 TF/02 Correct gecos expansion when From: is a prefix of the username.
1009 Test 0254 submits a message to Exim with the header
1013 When I ran the test suite under the user fanf2, Exim expanded
1014 the header to contain my full name, whereas it should have added
1015 a Resent-Sender: header. It erroneously treats any prefix of the
1016 username as equal to the username.
1018 This change corrects that bug.
1020 GF/01 DCC debug and logging tidyup
1021 Error conditions log to paniclog rather than rejectlog.
1022 Debug lines prefixed by "DCC: " to remove any ambiguity.
1024 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1026 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1027 Bug spotted by Jeremy Harris; was flawed since initial commit.
1028 Would have resulted in OCSP responses post-SNI triggering an Exim
1029 NULL dereference and crash.
1031 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1033 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1034 Bug detection, analysis and fix by Samuel Thibault.
1035 Bugzilla 1331, Debian bug #698092.
1037 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1039 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1040 Server implementation by Todd Lyons, client by JH.
1041 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1042 config variable "prdr_enable" controls whether the server
1043 advertises the facility. If the client requests PRDR a new
1044 acl_data_smtp_prdr ACL is called once for each recipient, after
1045 the body content is received and before the acl_smtp_data ACL.
1046 The client is controlled by both of: a hosts_try_prdr option
1047 on the smtp transport, and the server advertisement.
1048 Default client logging of deliveries and rejections involving
1049 PRDR are flagged with the string "PRDR".
1051 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1052 fclose(). Diagnosis by Todd Lyons.
1054 PP/17 Update configure.default to handle IPv6 localhost better.
1055 Patch by Alain Williams (plus minor tweaks).
1058 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1059 This is now consistent with GnuTLS, and is now documented: the
1060 previous undocumented portable approach to treating the option as
1061 unset was to force an expansion failure. That still works, and
1062 an empty string is now equivalent.
1064 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1065 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1066 not performing validation itself.
1068 PP/20 Added force_command boolean option to pipe transport.
1069 Patch from Nick Koston, of cPanel Inc.
1071 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1074 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1076 PP/21 Fix eximon continuous updating with timestamped log-files.
1077 Broken in a format-string cleanup in 4.80, missed when I repaired the
1078 other false fix of the same issue.
1079 Report and fix from Heiko Schlichting.
1082 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1083 Report from Prashanth Katuri.
1085 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1086 It's SecureTransport, so affects any MacOS clients which use the
1087 system-integrated TLS libraries, including email clients.
1089 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1090 using a MIME ACL for non-SMTP local injection.
1091 Report and assistance in diagnosis by Warren Baker.
1093 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1095 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1097 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1098 last id that failed so it may be referenced in subsequent ACL's.
1100 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1103 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1104 ldap library initialization, allowing self-signed CA's to be
1105 used. Also properly sets require_cert option later in code by
1106 using NULL (global ldap config) instead of ldap handle (per
1107 session). Bug diagnosis and testing by alxgomz.
1109 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1110 the src/util/ subdirectory.
1112 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1113 renamed to Transport Post Delivery Action by Jeremy Harris, as
1116 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1117 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1118 redis_servers = needs to be configured which will be used by the redis
1119 lookup. Patch from Warren Baker, of The Packet Hub.
1121 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1123 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1124 hostname or reverse DNS when processing a host list. Used suggestions
1125 from multiple comments on this bug.
1127 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1129 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1130 Missed a few lines, added it to make the runtest require no keyboard
1133 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1134 contains upper case chars. Make router use caseful_local_part.
1136 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1137 support when GnuTLS has been built with p11-kit.
1143 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1145 This, or similar/improved, will also be change PP/11 of 4.82.
1151 PP/01 Handle short writes when writing local log-files.
1152 In practice, only affects FreeBSD (8 onwards).
1153 Bugzilla 1053, with thanks to Dmitry Isaikin.
1155 NM/01 Bugzilla 949 - Documentation tweak
1157 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1160 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1162 PP/02 Implemented gsasl authenticator.
1164 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1166 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1167 `pkg-config foo` for cflags/libs.
1169 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1170 with rest of GSASL and with heimdal_gssapi.
1172 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1173 `pkg-config foo` for cflags/libs for the TLS implementation.
1175 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1176 properties get this fed in as external SSF. A number of robustness
1177 and debugging improvements to the cyrus_sasl authenticator.
1179 PP/08 cyrus_sasl server now expands the server_realm option.
1181 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1182 Patch by Jeremy Harris.
1184 PP/10 Added dbmjz lookup type.
1186 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1188 PP/12 MAIL args handles TAB as well as SP, for better interop with
1189 non-compliant senders.
1190 Analysis and variant patch by Todd Lyons.
1192 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1193 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1194 Patch from Dirk Mueller <dmueller@suse.com>
1196 PP/13 tls_peerdn now print-escaped for spool files.
1197 Observed some $tls_peerdn in wild which contained \n, which resulted
1198 in spool file corruption.
1200 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1201 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1202 or write after TLS renegotiation, which otherwise led to messages
1205 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1206 as a tracking header (ie: a signed header comes before the signature).
1207 Patch from Wolfgang Breyha.
1209 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1210 comma-sep list; embedded commas doubled.
1212 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1214 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1216 Report and patch from Dmitry Banschikov.
1218 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1219 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1220 failures. We appear to now support TLS1.1+ with Exim.
1222 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1223 lets Exim select keys and certificates based upon TLS SNI from client.
1224 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1225 before an outbound SMTP session. New log_selector, +tls_sni.
1227 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1228 NULL dereference. Report and patch from Alun Jones.
1230 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1231 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1232 Not seeing resolver debug output on NetBSD, but suspect this is a
1233 resolver implementation change.
1235 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1236 Left warnings. Added "eximon gdb" invocation mode.
1238 PP/21 Defaulting "accept_8bitmime" to true, not false.
1240 PP/22 Added -bw for inetd wait mode support.
1242 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1243 locate the relevant includes and libraries. Made this the default.
1245 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1246 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1248 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1249 This may cause build issues on older platforms.
1251 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1252 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1253 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1254 Added SNI support via GnuTLS too.
1255 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1257 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1259 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1260 Applied second patch from Janne, implementing suggestion to default
1261 multiple-strings-in-record handling to match SPF spec.
1263 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1265 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1266 read-only, out of scope).
1267 Patch from Wolfgang Breyha, report from Stuart Northfield.
1269 PP/29 Fix three issues highlighted by clang analyser static analysis.
1270 Only crash-plausible issue would require the Cambridge-specific
1271 iplookup router and a misconfiguration.
1272 Report from Marcin Mirosław.
1274 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1276 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1277 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1278 As part of this, removing so much warning spew let me fix some minor
1279 real issues in debug logging.
1281 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1282 assignment on my part. Fixed.
1284 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1285 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1286 Janne Snabb (who went above and beyond: thank you).
1288 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1289 string otherwise requires a connection and a bunch more work and it's
1290 relatively easy to get wrong. Should also expose TLS library linkage
1293 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1294 64-bit ${eval} (JH/03).
1296 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1297 GNU libc to support some of the 64-bit stuff, should not lead to
1298 conflicts. Defined before os.h is pulled in, so if a given platform
1299 needs to override this, it can.
1301 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1302 protection layer was required, which is not implemented.
1303 Bugzilla 1254, patch from Wolfgang Breyha.
1305 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1306 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1307 tls_dhparam take prime identifiers. Also unbreak combination of
1308 OpenSSL+DH_params+TLSSNI.
1310 PP/39 Disable SSLv2 by default in OpenSSL support.
1316 PP/01 Solaris build fix for Oracle's LDAP libraries.
1317 Bugzilla 1109, patch from Stephen Usher.
1319 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1321 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1324 TF/02 Fix a couple more cases where we did not log the error message
1325 when unlink() failed. See also change 4.74-TF/03.
1327 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1328 lock up or crash if it happened to be inside a call to libc when it
1329 got a SIGUSR1 from exiwhat.
1331 The SIGUSR1 handler appends the current process status to the process
1332 log which is later printed by exiwhat. It used to use the general
1333 purpose logging code to do this, but several functions it calls are
1334 not safe for signals.
1336 The new output code in the SIGUSR1 handler is specific to the process
1337 log, and simple enough that it's easy to inspect for signal safety.
1338 Removing some special cases also simplifies the general logging code.
1339 Removing the spurious timestamps from the process log simplifies
1342 TF/04 Improved ratelimit ACL condition.
1344 The /noupdate option has been deprecated in favour of /readonly which
1345 has clearer semantics. The /leaky, /strict, and /readonly update modes
1346 are mutually exclusive. The update mode is no longer included in the
1347 database key; it just determines when the database is updated. (This
1348 means that when you upgrade Exim will forget old rate measurements.)
1350 Exim now checks that the per_* options are used with an update mode that
1351 makes sense for the current ACL. For example, when Exim is processing a
1352 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1353 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1354 must specify per_mail/readonly. If you omit the update mode it defaults to
1355 /leaky where that makes sense (as before) or /readonly where required.
1357 The /noupdate option is now undocumented but still supported for
1358 backwards compatibility. It is equivalent to /readonly except that in
1359 ACLs where /readonly is required you may specify /leaky/noupdate or
1360 /strict/noupdate which are treated the same as /readonly.
1362 A useful new feature is the /count= option. This is a generalization
1363 of the per_byte option, so that you can measure the throughput of other
1364 aggregate values. For example, the per_byte option is now equivalent
1365 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1367 The per_rcpt option has been generalized using the /count= mechanism
1368 (though it's more complicated than the per_byte equivalence). When it is
1369 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1370 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1371 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1372 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1373 Note that using per_rcpt with a non-readonly update mode in more than
1374 one ACL will cause the recipients to be double-counted. (The per_mail
1375 and per_byte options don't have this problem.)
1377 The handling of very low rates has changed slightly. If the computed rate
1378 is less than the event's count (usually one) then this event is the first
1379 after a long gap. In this case the rate is set to the same as this event's
1380 count, so that the first message of a spam run is counted properly.
1382 The major new feature is a mechanism for counting the rate of unique
1383 events. The new per_addr option counts the number of different
1384 recipients that someone has sent messages to in the last time period. It
1385 behaves like per_rcpt if all the recipient addresses are different, but
1386 duplicate recipient addresses do not increase the measured rate. Like
1387 the /count= option this is a general mechanism, so the per_addr option
1388 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1389 example, measure the rate that a client uses different sender addresses
1390 with the options per_mail/unique=$sender_address. There are further
1391 details in the main documentation.
1393 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1395 TF/06 Removed a few PCRE remnants.
1397 TF/07 Automatically extract Exim's version number from tags in the git
1398 repository when doing development or release builds.
1400 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1401 Bugzilla 879. Patch from Paul Fisher.
1403 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1404 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1407 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1409 PP/05 Variable $av_failed, true if the AV scanner deferred.
1410 Bugzilla 1078. Patch from John Horne.
1412 PP/06 Stop make process more reliably on build failure.
1413 Bugzilla 1087. Patch from Heiko Schlittermann.
1415 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1416 Bugzilla 1089. Patch from Heiko Schlittermann.
1418 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1419 Bugzilla 1131. Patch from Holger Weiß.
1421 PP/09 Handle IPv6 addresses with SPF.
1422 Bugzilla 860. Patch from Wolfgang Breyha.
1424 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1426 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1429 PP/11 match_* no longer expand right-hand-side by default.
1430 New compile-time build option, EXPAND_LISTMATCH_RHS.
1431 New expansion conditions, "inlist", "inlisti".
1433 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1435 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1437 PP/14 fix log_write() format string regression from TF/03.
1438 Bugzilla 1152. Patch from Dmitry Isaikin.
1444 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1446 PP/02 Harmonised TLS library version reporting; only show if debugging.
1447 Layout now matches that introduced for other libraries in 4.74 PP/03.
1449 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1451 PP/04 New "dns_use_edns0" global option.
1453 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1456 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1457 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1459 TK/01 Updated PolarSSL code to 0.14.2.
1460 Bugzilla 1097. Patch from Andreas Metzler.
1462 PP/07 Catch divide-by-zero in ${eval:...}.
1463 Fixes bugzilla 1102.
1465 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1468 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1469 format-string attack -- SECURITY: remote arbitrary code execution.
1471 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1472 time unintentionally subject to list matching rules, letting the header
1473 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1474 arbitrary string expansion). This allowed for information disclosure.
1476 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1477 INT_MIN/-1 -- value coerced to INT_MAX.
1483 NM/01 Workaround for PCRE version dependency in version reporting
1486 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1487 This fixes portability to compilers other than gcc, notably
1488 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1490 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1491 makefiles for portability to HP-UX and POSIX correctness.
1493 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1494 Also via indented variable definition in the Makefile.
1495 (Debugging by Oliver Heesakkers).
1497 PP/02 Restore caching of spamd results with expanded spamd_address.
1498 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1500 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1501 Improves build reliability. Fix from: Frank Elsner
1503 NM/02 Fix wide character breakage in the rfc2047 coding
1504 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1506 NM/03 Allow underscore in dnslist lookups
1507 Fixes bug 1026. Patch from Graeme Fowler
1509 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1510 Code patches from Adam Ciarcinski of NetBSD.
1512 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1515 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1516 is logged, to avoid truncation. Patch from John Horne.
1518 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1519 Patch from Jakob Hirsch.
1521 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1522 SQL string expansion failure details.
1523 Patch from Andrey Oktyabrski.
1525 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1526 Patch from Simon Arlott.
1528 PP/09 New lookups functionality failed to compile on old gcc which rejects
1529 extern declarations in function scope.
1530 Patch from Oliver Fleischmann
1532 PP/10 Use sig_atomic_t for flags set from signal handlers.
1533 Check getgroups() return and improve debugging.
1534 Fixed developed for diagnosis in bug 927 (which turned out to be
1537 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1538 Patch from Mark Zealey.
1540 PP/12 Bugzilla 1056: Improved spamd server selection.
1541 Patch from Mark Zealey.
1543 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1544 Based on patch from Heiko Schlittermann.
1546 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1547 Patch from Uwe Doering, sign-off by Michael Haardt.
1549 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1550 variable declaration deep within a block. Bug and patch from
1553 PP/15 lookups-Makefile IRIX compatibility coercion.
1555 PP/16 Make DISABLE_DKIM build knob functional.
1557 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1558 Patch by Simon Arlott
1560 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1561 variable argument macros. Our copy now differs from upstream.
1567 TF/01 Failure to get a lock on a hints database can have serious
1568 consequences so log it to the panic log.
1570 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1571 controlled using the smtp_confirmation log selector.
1573 TF/03 Include the error message when we fail to unlink a spool file.
1575 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1576 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1577 for maintaining out-of-tree patches for some time.
1579 PP/01 Bugzilla 139: Documentation and portability issues.
1580 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1581 Handle per-OS dynamic-module compilation flags.
1583 PP/02 Let /dev/null have normal permissions.
1584 The 4.73 fixes were a little too stringent and complained about the
1585 permissions on /dev/null. Exempt it from some checks.
1586 Reported by Andreas M. Kirchwitz.
1588 PP/03 Report version information for many libraries, including
1589 Exim version information for dynamically loaded libraries. Created
1590 version.h, now support a version extension string for distributors
1591 who patch heavily. Dynamic module ABI change.
1593 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1594 privilege escalation vulnerability whereby the Exim run-time user
1595 can cause root to append content of the attacker's choosing to
1598 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1601 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1602 If dropping privileges for untrusted macros, we disabled normal logging
1603 on the basis that it would fail; for the Exim run-time user, this is not
1604 the case, and it resulted in successful deliveries going unlogged.
1605 Fixed. Reported by Andreas Metzler.
1611 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1612 only prepend for the Resent-* case. Fixes regression introduced in
1613 Exim 4.70 by NM/22 for Bugzilla 607.
1615 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1616 increasing numbers of administrators be bitten by this.
1618 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1620 PP/03 Bugzilla 994: added openssl_options main configuration option.
1622 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1624 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1626 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1628 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1629 without a peer certificate, leading to a segfault because of an
1630 assumption that peers always have certificates. Be a little more
1631 paranoid. Problem reported by Martin Tscholak.
1633 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1634 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1635 NB: ClamAV planning to remove STREAM in "middle of 2010".
1636 CL also introduces -bmalware, various -d+acl logging additions and
1637 more caution in buffer sizes.
1639 PP/09 Implemented reverse_ip expansion operator.
1641 PP/10 Bugzilla 937: provide a "debug" ACL control.
1643 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1645 PP/12 Bugzilla 973: Implement --version.
1647 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1649 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1651 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1653 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1654 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1655 ignore trailing whitespace.
1657 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1659 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1662 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1663 Notification from Dr Andrew Aitchison.
1665 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1666 ExtendedDetectionInfo response format.
1667 Notification from John Horne.
1669 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1672 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1673 XSL and documented dependency on system catalogs, with examples of how
1676 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1679 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1680 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1681 configuration file which is writeable by the Exim user or group.
1683 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1684 of configuration files to cover files specified with the -C option if
1685 they are going to be used with root privileges, not just the default
1688 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1689 option (effectively making it always true).
1691 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1692 files to be used while preserving root privileges.
1694 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1695 that rogue child processes cannot use them.
1697 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1698 run-time user, instead of root.
1700 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1701 Exim run-time user without dropping privileges.
1703 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1704 result string, instead of calling string_vformat() twice with the same
1707 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1708 for other users. Others should always drop root privileges if they use
1709 -C on the command line, even for a whitelisted configure file.
1711 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1713 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1719 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1720 $data_path, and $header_path variables; fixed documentation bugs and
1723 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1724 exipick to access non-standard spools, including the "frozen" queue
1727 NM/01 Bugzilla 965: Support mysql stored procedures.
1728 Patch from Alain Williams
1730 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1732 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1733 Patch from Andreas Metzler
1735 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1736 Patch from Kirill Miazine
1738 NM/05 Bugzilla 671: Added umask to procmail example.
1740 JJ/03 installed exipick 20100323.0, fixing doc bug
1742 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1743 directory. Notification and patch from Dan Rosenberg.
1745 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1747 TK/02 Improve log output when DKIM signing operation fails.
1749 MH/01 Treat the transport option dkim_domain as a colon separated
1750 list, not as a single string, and sign the message with each element,
1751 omitting multiple occurences of the same signer.
1753 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1754 Bugzilla 985, 986. Patch by Simon Arlott
1756 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1757 Patch by Simon Arlott
1759 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1760 MBX locking. Notification from Dan Rosenberg.
1766 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1768 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1770 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1772 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1774 NM/04 Bugzilla 915: Flag broken perl installation during build.
1780 TK/01 Added patch by Johannes Berg that expands the main option
1781 "spamd_address" if it starts with a dollar sign.
1783 TK/02 Write list of recipients to X-Envelope-Sender header when building
1784 the mbox-format spool file for content scanning (suggested by Jakob
1787 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1788 (http://www.dcc-servers.net/) support via dccifd. Activated by
1789 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1791 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1792 by Mark Daniel Reidel <mr@df.eu>.
1794 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1795 When building exim an external PCRE library is now needed -
1796 PCRE is a system library on the majority of modern systems.
1797 See entry on PCRE_LIBS in EDITME file.
1799 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1800 conversation. Added nologin parameter to request.
1801 Patch contributed by Kirill Miazine.
1803 TF/01 Do not log submission mode rewrites if they do not change the address.
1805 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1807 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1808 log files in place. Contributed by Roberto Lima.
1810 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1812 TF/03 Bugzilla 615: When checking the local_parts router precondition
1813 after a local_part_suffix or local_part_prefix option, Exim now
1814 does not use the address's named list lookup cache, since this
1815 contains cached lookups for the whole local part.
1817 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1818 Robert Millan. Documentation is in experimental-spec.txt.
1820 TF/04 Bugzilla 668: Fix parallel build (make -j).
1822 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1824 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1825 Patch provided by Jan Srzednicki.
1827 TF/05 Leading white space used to be stripped from $spam_report which
1828 wrecked the formatting. Now it is preserved.
1830 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1831 that they are available at delivery time.
1833 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1835 TF/08 TLS error reporting now respects the incoming_interface and
1836 incoming_port log selectors.
1838 TF/09 Produce a more useful error message if an SMTP transport's hosts
1839 setting expands to an empty string.
1841 NM/06 Bugzilla 744: EXPN did not work under TLS.
1842 Patch provided by Phil Pennock.
1844 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1845 Patch provided by Richard Godbee.
1847 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1848 acl_smtp_notquit, added index entry.
1850 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1851 Patch provided by Eugene Bujak.
1853 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1854 accept(). Patch provided by Maxim Dounin.
1856 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1857 Patch provided by Phil Pennock.
1859 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1861 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1862 Patch provided by Brad "anomie" Jorsch.
1864 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1865 Patch provided by Dean Brooks.
1867 TK/05 Add native DKIM support (does not depend on external libraries).
1869 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1870 Patch provided by Graeme Fowler.
1872 NM/16 Bugzilla 851: Documentation example syntax fix.
1874 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1876 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1879 NM/19 Bugzilla 745: TLS version reporting.
1880 Patch provided by Phil Pennock.
1882 NM/20 Bugzilla 167: bool: condition support.
1883 Patch provided by Phil Pennock.
1885 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1886 clients. Patch provided by Phil Pennock.
1888 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1889 Patch provided by Brad "anomie" Jorsch.
1891 NM/23 Bugzilla 687: Fix misparses in eximstats.
1892 Patch provided by Heiko Schlittermann.
1894 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1895 Patch provided by Heiko Schlittermann.
1897 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1898 plus update to original patch.
1900 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1902 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1903 Patch provided by David Brownlee.
1905 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1907 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1909 NM/30 Bugzilla 888: TLS documentation bugfixes.
1911 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1913 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1914 Unlike the original bugzilla I have changed all shell scripts in src tree.
1916 NM/33 Bugzilla 898: Transport filter timeout fix.
1917 Patch by Todd Rinaldo.
1919 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1920 Patch by Serge Demonchaux.
1922 NM/35 Bugzilla 39: Base64 decode bug fixes.
1923 Patch by Jakob Hirsch.
1925 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1927 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1929 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1931 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1937 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1938 ALT-N's libdkim that I have put here:
1939 http://duncanthrax.net/exim-experimental/
1941 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1942 were called 'true' and it seems that C99 defines that as a reserved
1943 keyword to be used with 'bool' variable types. That means you could
1944 not include C99-style headers which use bools without triggering
1945 build errors in sieve.c.
1947 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1948 as mailq or other aliases. Changed the --help handling significantly
1949 to do whats expected. exim_usage() emits usage/help information.
1951 SC/01 Added the -bylocaldomain option to eximstats.
1953 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1955 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1957 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1963 PH/01 Another patch from the Sieve maintainer.
1965 PH/02 When an IPv6 address is converted to a string for single-key lookup
1966 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1967 dots are used instead of colons so that keys in lsearch files need not
1968 contain colons. This was done some time before quoting was made available
1969 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1970 (notated using the quote facility) so as to distinguish them from IPv4
1971 keys. This meant that lookups for IP addresses in host lists did not work
1972 for iplsearch lookups.
1974 This has been fixed by arranging for IPv6 addresses to be expressed with
1975 colons if the lookup type is iplsearch. This is not incompatible, because
1976 previously such lookups could never work.
1978 The situation is now rather anomalous, since one *can* have colons in
1979 ordinary lsearch keys. However, making the change in all cases is
1980 incompatible and would probably break a number of configurations.
1982 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1985 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1986 conversion specification without a maximum field width, thereby enabling
1987 a rogue spamd server to cause a buffer overflow. While nobody in their
1988 right mind would setup Exim to query an untrusted spamd server, an
1989 attacker that gains access to a server running spamd could potentially
1990 exploit this vulnerability to run arbitrary code as the Exim user.
1992 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1993 $primary_hostname instead of what libspf2 thinks the hosts name is.
1995 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1996 a directory entry by the name of the lookup key. Previously, if a
1997 symlink pointed to a non-existing file or a file in a directory that
1998 Exim lacked permissions to read, a lookup for a key matching that
1999 symlink would fail. Now it is enough that a matching directory entry
2000 exists, symlink or not. (Bugzilla 503.)
2002 PH/03 The body_linecount and body_zerocount variables are now exported in the
2005 PH/04 Added the $dnslist_matched variable.
2007 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2008 This means they are set thereafter only if the connection becomes
2011 PH/06 Added the client_condition to authenticators so that some can be skipped
2012 by clients under certain conditions.
2014 PH/07 The error message for a badly-placed control=no_multiline_responses left
2015 "_responses" off the end of the name.
2017 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2019 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2020 (without spaces) instead of just copying the configuration text.
2022 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2024 PH/11 Added $max_received_linelength.
2026 PH/12 Added +ignore_defer and +include_defer to host lists.
2028 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2029 way in which PCRE > 7.0 is built.
2031 PH/14 Implemented queue_only_load_latch.
2033 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2034 MAIL command. The effect was to mangle the value on 64-bit systems.
2036 PH/16 Another patch from the Sieve maintainer.
2038 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2040 PH/18 If a system quota error occurred while trying to create the file for
2041 a maildir delivery, the message "Mailbox is full" was not appended to the
2042 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2043 only to a quota excession during the actual writing of the file.
2045 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2046 characters?) which causes problems in log lines. The DN values are now
2047 passed through string_printing() before being added to log lines.
2049 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2050 and InterBase are left for another time.)
2052 PH/21 Added message_body_newlines option.
2054 PH/22 Guard against possible overflow in moan_check_errorcopy().
2056 PH/23 POSIX allows open() to be a macro; guard against that.
2058 PH/24 If the recipient of an error message contained an @ in the local part
2059 (suitably quoted, of course), incorrect values were put in $domain and
2060 $local_part during the evaluation of errors_copy.
2066 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2067 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2070 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2071 issue a MAIL command.
2073 PH/02 In an ACL statement such as
2075 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2077 if a client was not listed at all, or was listed with a value other than
2078 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2079 the condition was not true (as it should be), so access was not denied.
2080 The bug was that the ! inversion was incorrectly passed on to the second
2081 item. This has been fixed.
2083 PH/03 Added additional dnslists conditions == and =& which are different from
2084 = and & when the dns lookup returns more than one IP address.
2086 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2087 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2089 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2090 FSYNC, which compiles an option called disable_fsync that allows for
2091 bypassing fsync(). The documentation is heavily laced with warnings.
2093 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2095 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2096 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2097 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2098 including adding "make clean"; (3) Added -fPIC when compiling the test
2099 dynamically loaded module, to get rid of a warning.
2101 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2102 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2103 = 0s. The bug is otherwise harmless.
2105 PH/07 There was a bug in the dovecot authenticator such that the value of
2106 $auth1 could be overwritten, and so not correctly preserved, after a
2107 successful authentication. This usually meant that the value preserved by
2108 the server_setid option was incorrect.
2110 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2112 PH/09 Installed PCRE release 7.0.
2114 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2115 run for batched SMTP input. It is now run at the start of every message
2116 in the batch. While fixing this I discovered that the process information
2117 (output by running exiwhat) was not always getting set for -bs and -bS
2118 input. This is fixed, and it now also says "batched" for BSMTP.
2120 PH/11 Added control=no_pipelining.
2122 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2123 patch, slightly modified), and move the expansion of helo_data till after
2124 the connection is made in the smtp transport (so it can use these
2127 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2129 PH/14 Added log_selector = +pid.
2131 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2133 PH/16 Add ${if forany and ${if forall.
2135 PH/17 Added dsn_from option to vary the From: line in DSNs.
2137 PH/18 Flush SMTP output before performing a callout, unless control =
2138 no_callout_flush is set.
2140 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2141 was true (the default) a successful delivery failed to delete the retry
2142 item, thus causing premature timeout of the address. The bug is now
2145 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2147 PH/21 Long custom messages for fakedefer and fakereject are now split up
2148 into multiline responses in the same way that messages for "deny" and
2149 other ACL rejections are.
2151 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2152 with slight modification.
2154 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2155 draft, changing the syntax and factoring some duplicate code".
2157 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2158 for deliveries of the second and subsequent messages over the same SMTP
2161 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2162 ${reduce, with only minor "tidies".
2164 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2166 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2167 expansion side effects.
2169 PH/27 When a message times out after an over-quota error from an Exim-imposed
2170 quota, the bounce message says "mailbox is full". This message was not
2171 being given when it was a system quota that was exceeded. It now should
2174 MH/03 Made $recipients available in local_scan(). local_scan() already has
2175 better access to the recipient list through recipients_list[], but
2176 $recipients can be useful in postmaster-provided expansion strings.
2178 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2179 in the case of a MAIL command with additional options following the
2180 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2181 were accidentally chopped off.
2183 PH/29 SMTP synchronization checks are implemented when a command is read -
2184 there is a check that no more input is waiting when there shouldn't be
2185 any. However, for some commands, a delay in an ACL can mean that it is
2186 some time before the response is written. In this time, more input might
2187 arrive, invalidly. So now there are extra checks after an ACL has run for
2188 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2189 pipelining has not been advertised.
2191 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2193 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2194 returned in the SMTP response when smtp_return_error_details was false.
2195 This has been fixed.
2197 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2198 instead of the C I/O that was originally supplied, because problems were
2199 reported on Solaris.
2201 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2202 Exim which did not show up earlier: it was assuming that a call to
2203 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2204 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2205 was a macro that became an assignment, so it seemed to work. This has
2206 changed to a proper function call with a void return, hence the compile
2207 error. Exim's code has been fixed.
2209 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2212 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2214 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2216 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2217 because it turns out to be too big or there is a timeout) there is no
2218 "Completed" line in the log. When some messages of this type were
2219 selected by exigrep, they were listed as "not completed". Others were
2220 picked up by some special patterns. I have improved the selection
2221 criteria to be more general.
2223 PH/38 The host_find_failed option in the manualroute router can now be set
2224 to "ignore", to completely ignore a host whose IP address cannot be
2225 found. If all hosts are ignored, the behaviour is controlled by the new
2226 host_all_ignored option.
2228 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2229 homing or because of multiple MX records with /mx) generated more than
2230 one IP address, and the following item turned out to be the local host,
2231 all the secondary addresses of the first item were incorrectly removed
2232 from the list, along with the local host and any following hosts (which
2233 is what is supposed to happen).
2235 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2236 whoever called Exim into the -H file. In the case of the daemon it was
2237 behaving confusingly. When first started, it used values for whoever
2238 started the daemon, but after a SIGHUP it used the Exim user (because it
2239 calls itself on a restart). I have changed the code so that it now always
2242 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2243 message are rejected with the same error (e.g. no authentication or bad
2244 sender address), and a DATA command is nevertheless sent (as can happen
2245 with PIPELINING or a stupid MUA), the error message that was given to the
2246 RCPT commands is included in the rejection of the DATA command. This is
2247 intended to be helpful for MUAs that show only the final error to their
2250 PH/42 Another patch from the Sieve maintainer.
2252 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2253 Eximstats - Fixed some broken HTML links and added missing column headers
2255 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2256 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2258 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2260 PH/43 Yet another patch from the Sieve maintainer.
2262 PH/44 I found a way to check for a TCP/IP connection going away before sending
2263 the response to the final '.' that terminates a message, but only in the
2264 case where the client has not sent further data following the '.'
2265 (unfortunately, this is allowed). However, in many cases there won't be
2266 any further data because there won't be any more messages to send. A call
2267 to select() can be used: if it shows that the input is "ready", there is
2268 either input waiting, or the socket has been closed. An attempt to read
2269 the next input character can distinguish the two cases. Previously, Exim
2270 would have sent an OK response which the client would never have see.
2271 This could lead to message repetition. This fix should cure that, at
2272 least in a lot of common cases.
2274 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2275 advertised in response to EHLO.
2281 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2282 fixed by 4.65/MH/01 (is this a record?) are fixed:
2284 (i) An empty string was always treated as zero by the numeric comparison
2285 operators. This behaviour has been restored.
2287 (ii) It is documented that the numeric comparison operators always treat
2288 their arguments as decimal numbers. This was broken in that numbers
2289 starting with 0 were being interpreted as octal.
2291 While fixing these problems I realized that there was another issue that
2292 hadn't been noticed. Values of message_size_limit (both the global option
2293 and the transport option) were treated as octal if they started with 0.
2294 The documentation was vague. These values are now always treated as
2295 decimal, and I will make that clear in the documentation.
2301 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2302 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2305 MH/01 Don't check that the operands of numeric comparison operators are
2306 integers when their expansion is in "skipping" mode (fixes bug
2307 introduced by 4.64-PH/07).
2309 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2310 child addresses, Exim now panics and dies. Previously, because the count
2311 is held in a short int, deliveries were likely to be lost. As such a
2312 large number of recipients for a single message is ridiculous
2313 (performance will be very, very poor), I have chosen to impose a limit
2314 rather than extend the field.
2320 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2321 leftover -K file (the existence of which was triggered by #402).
2322 While we were at it, introduced process PID as part of the -K
2323 filename. This should rule out race conditions when creating
2326 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2327 processing considerably. Previous code took too long for large mails,
2328 triggering a timeout which in turn triggers #401.
2330 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2331 in the DK code in transports.c. sendfile() is not really portable,
2332 hence the _LINUX specificness.
2334 TF/01 In the add_headers option to the mail command in an Exim filter,
2335 there was a bug that Exim would claim a syntax error in any
2336 header after the first one which had an odd number of characters
2339 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2340 callout verification, Exim cached a "reject" for the entire domain. This
2341 is correct for most verifications, but it is not correct for a recipient
2342 verification with use_sender or use_postmaster set, because in that case
2343 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2344 case of MAIL FROM:<> rejection from other early rejections (e.g.
2345 rejection of HELO). When verifying a recipient using a non-null MAIL
2346 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2347 Whatever the result of the callout, the value of the domain cache is
2348 left unchanged (for any other kind of callout, getting as far as trying
2349 RCPT means that the domain itself is ok).
2351 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2354 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2355 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2356 session, the daemon ignores ECONNECT errors and logs others; it now
2357 ignores EPIPE as well.
2359 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2360 (quoted-printable decoding).
2362 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2363 later the small subsequent patch to fix an introduced bug.
2365 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2367 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2369 PH/08 An error is now given if message_size_limit is specified negative.
2371 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2372 to be given (somewhat) arbitrary names.
2374 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2377 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2378 miscellaneous code fixes
2380 PH/10 Added the log_reject_target ACL modifier to specify where to log
2383 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2384 hostname. This is wrong, because it relates to the incoming message (and
2385 probably the interface on which it is arriving) and not to the outgoing
2386 callout (which could be using a different interface). This has been
2387 changed to use the value of the helo_data option from the smtp transport
2388 instead - this is what is used when a message is actually being sent. If
2389 there is no remote transport (possible with a router that sets up host
2390 addresses), $smtp_active_hostname is used.
2392 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2393 tweaks were necessary in order to get it to work (see also 21 below):
2394 (a) The code assumed that strncpy() returns a negative number on buffer
2395 overflow, which isn't the case. Replaced with Exim's string_format()
2397 (b) There were several signed/unsigned issues. I just did the minimum
2398 hacking in of casts. There is scope for a larger refactoring.
2399 (c) The code used strcasecmp() which is not a standard C function.
2400 Replaced with Exim's strcmpic() function.
2401 (d) The code set only $1; it now sets $auth1 as well.
2402 (e) A simple test gave the error "authentication client didn't specify
2403 service in request". It would seem that Dovecot has changed its
2404 interface. Fortunately there's a specification; I followed it and
2405 changed what the client sends and it appears to be working now.
2407 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2410 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2411 address A is aliased to B and C, where B exists and C does not. Without
2412 -v the output is "A verified" because verification stops after a
2413 successful redirection if more than one address is generated. However,
2414 with -v the child addresses are also verified. Exim was outputting "A
2415 failed to verify" and then showing the successful verification for C,
2416 with its parentage. It now outputs "B failed to verify", showing B's
2417 parentage before showing the successful verification of C.
2419 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2420 look up a TXT record in a specific list after matching in a combined
2423 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2424 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2425 they consult the DNS. I had assumed they would set it the way they
2426 wanted; and indeed my experiments on Linux seem to show that in some
2427 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2428 To be on the safe side, however, I have now made the interface to
2429 host_find_byname() similar to host_find_bydns(), with an argument
2430 containing the DNS resolver options. The host_find_byname() function now
2431 sets these options at its start, just as host_find_bydns() does. The smtp
2432 transport options dns_qualify_single and dns_search_parents are passed to
2433 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2434 of host_find_byname() use the default settings of RES_DEFNAMES
2435 (qualify_single) but not RES_DNSRCH (search_parents).
2437 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2438 spool_read_header() do less string testing, by means of a preliminary
2439 switch on the second character of optional "-foo" lines. (This is
2440 overdue, caused by the large number of possibilities that now exist.
2441 Originally there were few.) While I was there, I also converted the
2442 str(n)cmp tests so they don't re-test the leading "-" and the first
2443 character, in the hope this might squeeze out yet more improvement.
2445 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2446 flag allowing group syntax was set by the header_syntax check but not
2447 turned off, possible causing trouble later; (2) The flag was not being
2448 set at all for the header_verify test, causing "group"-style headers to
2449 be rejected. I have now set it in this case, and also caused header_
2450 verify to ignore an empty address taken from a group. While doing this, I
2451 came across some other cases where the code for allowing group syntax
2452 while scanning a header line wasn't quite right (mostly, not resetting
2453 the flag correctly in the right place). These bugs could have caused
2454 trouble for malformed header lines. I hope it is now all correct.
2456 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2457 with the "reply" argument non-NULL. The code, however (which originally
2458 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2459 but it didn't always do it. This confused somebody who was copying the
2460 code for some other use. I have removed all the tests.
2462 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2463 feature that was used to support insecure browsers during the U.S. crypto
2464 embargo. It requires special client support, and Exim is probably the
2465 only MTA that supported it -- and would never use it because real RSA is
2466 always available. This code has been removed, because it had the bad
2467 effect of slowing Exim down by computing (never used) parameters for the
2468 RSA_EXPORT functionality.
2470 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2471 authenticator to fail if there's a tab character in the incoming data
2472 (there should never be unless someone is messing about, as it's supposed
2473 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2474 if the connection is using TLS or if the remote IP is the same as the
2475 local IP, and the "valid-client-cert option" if a client certificate has
2478 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2479 authenticators. This can be used for authorization after authentication
2480 succeeds. (In the case of plaintext, it servers for both authentication
2483 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2484 if any retry times were supplied.
2486 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2487 connection, where there is no client IP address to check. In this
2488 situation, the verify now always succeeds.
2490 PH/25 Applied John Jetmore's -Mset patch.
2492 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2494 PH/27 In a string expansion for a processed (not raw) header when multiple
2495 headers of the same name were present, leading whitespace was being
2496 removed from all of them, but trailing whitespace was being removed only
2497 from the last one. Now trailing whitespace is removed from each header
2498 before concatenation. Completely empty headers in a concatenation (as
2499 before) are ignored.
2501 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2502 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2504 PH/29 [Removed. This was a change that I later backed out, and forgot to
2505 correct the ChangeLog entry (that I had efficiently created) before
2506 committing the later change.]
2508 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2509 address errors (4xx response to RCPT) over the same connection as other
2510 messages routed to the same hosts. Such deliveries are always "forced",
2511 so retry times are not inspected. This resulted in far too many retries
2512 for the affected addresses. The effect occurred only when there were more
2513 hosts than the hosts_max_try setting in the smtp transport when it had
2514 the 4xx errors. Those hosts that it had tried were not added to the list
2515 of hosts for which the message was waiting, so if all were tried, there
2516 was no problem. Two fixes have been applied:
2518 (i) If there are any address or message errors in an SMTP delivery, none
2519 of the hosts (tried or untried) are now added to the list of hosts
2520 for which the message is waiting, so the message should not be a
2521 candidate for sending over the same connection that was used for a
2522 successful delivery of some other message. This seems entirely
2523 reasonable: after all the message is NOT "waiting for some host".
2524 This is so "obvious" that I'm not sure why it wasn't done
2525 previously. Hope I haven't missed anything, but it can't do any
2526 harm, as the worst effect is to miss an optimization.
2528 (ii) If, despite (i), such a delivery is accidentally attempted, the
2529 routing retry time is respected, so at least it doesn't keep
2530 hammering the server.
2532 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2533 in ${readsocket because some servers need this prod.
2535 PH/32 Added some extra debug output when updating a wait-xxx database.
2537 PH/33 The hint "could be header name not terminated by colon", which has been
2538 given for certain expansion errors for a long time, was not being given
2539 for the ${if def:h_colon_omitted{... case.
2541 PH/34 The spec says: "With one important exception, whenever a domain list is
2542 being scanned, $domain contains the subject domain." There was at least
2543 one case where this was not true.
2545 PH/35 The error "getsockname() failed: connection reset by peer" was being
2546 written to the panic log as well as the main log, but it isn't really
2547 panic-worthy as it just means the connection died rather early on. I have
2548 removed the panic log writing for the ECONNRESET error when getsockname()
2551 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2552 runs only) independently of the message's sender address. This meant
2553 that, if the 4xx error was in fact related to the sender, a different
2554 message to the same recipient with a different sender could confuse
2555 things. In particular, this can happen when sending to a greylisting
2556 server, but other circumstances could also provoke similar problems.
2557 I have changed the default so that the retry time for these errors is now
2558 based a combination of the sender and recipient addresses. This change
2559 can be overridden by setting address_retry_include_sender=false in the
2562 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2563 remote server are returned as part of bounce messages. This was not
2564 happening for LMTP over a pipe (the lmtp transport), but now it is the
2565 same for both kinds of LMTP.
2567 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2568 in header lines that were in fact CNAMEs. This is no longer the case.
2570 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2571 and queue runs started by the daemon processed all messages. This has
2572 been fixed so that -R and -S can now usefully be given with -q<time>.
2574 PH/40 Import PCRE release 6.7 (fixes some bugs).
2576 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2578 PH/42 Give an error if -q is specified more than once.
2580 PH/43 Renamed the variables $interface_address and $interface_port as
2581 $received_ip_address and $received_port, to make it clear that these
2582 values apply to message reception, and not to the outgoing interface when
2583 a message is delivered. (The old names remain recognized, of course.)
2585 PH/44 There was no timeout on the connect() call when using a Unix domain
2586 socket in the ${readsocket expansion. There now is.
2588 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2589 be meaningful with "accept".
2591 SC/01 Eximstats V1.43
2592 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2594 SC/02 Eximstats V1.44
2595 Use a glob alias rather than an array ref in the generated
2596 parser. This improves both readability and performance.
2598 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2599 Collect SpamAssassin and rejection statistics.
2600 Don't display local sender or destination tables unless
2601 there is data to show.
2602 Added average volumes into the top table text output.
2604 SC/04 Eximstats V1.46
2605 Collect data on the number of addresses (recipients)
2606 as well as the number of messages.
2608 SC/05 Eximstats V1.47
2609 Added 'Message too big' to the list of mail rejection
2610 reasons (thanks to Marco Gaiarin).
2612 SC/06 Eximstats V1.48
2613 Mainlog lines which have GMT offsets and are too short to
2614 have a flag are now skipped.
2616 SC/07 Eximstats V1.49 (Alain Williams)
2617 Added the -emptyok flag.
2619 SC/08 Eximstats V1.50
2620 Fixes for obtaining the IP address from reject messages.
2622 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2623 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2624 whitespace changes from 4.64-PH/27
2626 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2629 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2630 are found, allow negative numbers in numeric criteria)
2632 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2634 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2635 to match changes made in 4.64-PH/43
2637 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2639 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2640 "domain" is actually an IP address, and force a failure. This locks out
2641 those revolvers/nameservers that support "A-for-A" lookups, in
2642 contravention of the specifications.
2644 PH/48 When a host name was looked up from an IP address, and the subsequent
2645 forward lookup of the name timed out, the host name was left in
2646 $sender_host_name, contrary to the specification.
2648 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2649 restricted to single-key lookups, Exim was not diagnosing an error if
2650 * or *@ was used with a query-style lookup.
2652 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2654 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2655 long ago, but noone interested enough thought of it. Let's just say that
2656 the "1.1" means that there are some new functions that weren't there at
2657 some point in the past.
2659 PH/51 Error processing for expansion failure of helo_data from an smtp
2660 transport during callout processing was broken.
2662 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2663 tested/used via the -bh/-bhc/-bs options.
2665 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2666 bug, fixed in subsequent PCRE releases).
2668 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2669 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2671 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2677 SC/01 Use a glob alias rather than an array ref in eximstats generated
2678 parser. This improves both readability and performance.
2680 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2681 Don't display local sender or destination tables in eximstats unless
2682 there is data to show.
2683 Added average volumes into the eximstats top table text output.
2685 SC/03 Collect data on the number of addresses (recipients) as well
2686 as the number of messages in eximstats.
2688 TF/01 Correct an error in the documentation for the redirect router. Exim
2689 does (usually) call initgroups() when daemonizing.
2691 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2692 with consistent privilege compared to when running as a daemon.
2694 TF/03 Note in the spec that $authenticated_id is not set for local
2695 submissions from trusted users.
2697 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2698 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2700 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2701 by adding some example configuration directives to the default
2702 configuration file. A little bit of work is required to uncomment the
2703 directives and define how usernames and passwords are checked, but
2704 there is now a framework to start from.
2706 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2707 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2708 without this. I don't know how relevant this is to other LDAP libraries.
2710 PH/02 Add the verb name to the "unknown ACL verb" error.
2712 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2714 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2716 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2717 directory not expanded when it should be if an expanded home directory
2718 was set for the address (which is overridden by the transport).
2720 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2723 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2724 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2725 because it is too late at that time, and has no effect.
2727 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2728 security issue with \' (bugzilla #107). I could not use the
2729 PQescapeStringConn() function, because it needs a PGconn value as one of
2732 PH/08 When testing addresses using -bt, indicate those final addresses that
2733 are duplicates that would not cause an additional delivery. At least one
2734 person was confused, thinking that -bt output corresponded to deliveries.
2735 (Suppressing duplicates isn't a good idea as you lose the information
2736 about possibly different redirections that led to the duplicates.)
2738 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2739 systems where poll() doesn't work, in particular OS X.
2741 PH/10 Added more information to debugging output for retry time not reached.
2743 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2744 operations in malware.c.
2746 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2749 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2750 syslog_duplication set false, log lines that would normally be written
2751 both the the main log and to the reject log were not written to syslog at
2754 PH/14 In the default configuration, change the use of "message" in ACL warn
2755 statements to "add_header".
2757 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2758 not followed by a command (e.g. "seen endif").
2760 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2761 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2764 PH/17 Added extra conditions to the default value of delay_warning_condition
2768 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2769 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2770 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2773 The Auto-Submitted: and various List- headers are standardised, whereas I
2774 don't think Precedence: ever was.
2776 PH/18 Refactored debugging code in route_finduser() to show more information,
2777 in particular, the error code if getpwnam() issues one.
2779 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2780 This is apparently needed in addition to the PH/07 change above to avoid
2781 any possible encoding problems.
2783 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2784 but not after initializing Perl.
2786 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2787 output them only if debugging. By default they are written stderr,
2788 apparently, which is not desirable.
2790 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2793 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2796 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2798 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2799 authenticated or an ident call has been made. Suppress the default
2800 values for $authenticated_id and $authenticated_sender (but permit -oMai
2801 and -oMas) when testing with -bh.
2803 PH/24 Re-jigged the order of the tests in the default configuration so that the
2804 tests for valid domains and recipients precede the DNS black list and CSA
2805 tests, on the grounds that those ones are more expensive.
2807 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2808 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2809 This bug exists in every version of Exim that I still have, right back to
2812 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2813 However, an attempt to turn on case-sensitivity in a regex key by
2814 including (?-i) didn't work because the subject string was already
2815 lowercased, and the effects were non-intuitive. It turns out that a
2816 one-line patch can be used to allow (?-i) to work as expected.
2822 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2823 other effects) broke the use of negated acl sub-conditions.
2825 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2828 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2829 "Deny" causes Exim to reject the incoming connection with a 554 error.
2830 Unfortunately, if there is a major crisis, such as a disk failure,
2831 tcp-wrappers gives "deny", whereas what one would like would be some
2832 kind of temporary error. A kludge has been added to help with this.
2833 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2834 554 error is used if errno is still zero or contains ENOENT (which occurs
2835 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2838 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2840 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2841 errors. Otherwise a message that provokes a temporary error (when other
2842 messages do not) can cause a whole host to time out.
2844 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2845 addresses were routed directly to files or pipes from a redirect router.
2846 File deliveries just didn't batch; pipe deliveries might have suffered
2849 PH/06 A failure to get a lock for a hints database would erroneously always say
2850 "Failed to get write lock", even when it was really a read lock.
2852 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2853 of 0600. This has been changed to use the value of the lockfile_mode
2854 option (which defaults to 0600).
2856 PH/08 Applied small patch from the Sieve maintainer.
2858 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2859 folder from quota calculations, a direct delivery into this folder messed
2860 up the contents of the maildirsize file. This was because the regex was
2861 used only to exclude .Trash (or whatever) when the size of the mailbox
2862 was calculated. There was no check that a delivery was happening into an
2863 excluded directory. This bug has been fixed by ignoring all quota
2864 processing for deliveries into excluded directories.
2866 PH/10 Added the maildirfolder_create_regex option to appendfile.
2872 PH/01 The code for finding all the local interface addresses on a FreeBSD
2873 system running IPv6 was broken. This may well have applied to all BSD
2874 systems, as well as to others that have similar system calls. The broken
2875 code found IPv4 interfaces correctly, but gave incorrect values for the
2876 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2877 that it would not match correctly against @[] and not recognize the IPv6
2880 PH/02 The ipliteral router was not recognizing addresses of the form user@
2881 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2883 PH/03 Added disable_ipv6.
2885 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2886 decoded form, because it is most often used to construct To: headers
2887 lines in autoreplies, and the decoded form may well be syntactically
2888 invalid. However, $reply_address has leading white space removed, and all
2889 newlines turned into spaces so that the autoreply transport does not
2892 PH/05 If group was specified without a user on a router, and no group or user
2893 was specified on a transport, the group from the router was ignored.
2895 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2896 for visible compile-time settings that can be used to change these
2897 numbers, for those that want even more. Backwards compatibility with old
2898 spool files has been maintained. However, going back to a previous Exim
2899 release will lost any variables that are in spool files.
2901 PH/07 Two small changes when running in the test harness: increase delay when
2902 passing a TCP/IP connection to a new process, in case the original
2903 process has to generate a bounce, and remove special handling of
2904 127.0.0.2 (sic), which is no longer necessary.
2906 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2907 be the same on different OS.
2909 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2912 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2913 whether --show-vars was specified or not
2915 JJ/02 exipick: Added support for new ACL variable spool format introduced
2918 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2919 syntactically invalid From: or Reply-to: line, and a filter used this to
2920 generate an autoreply, and therefore failed to obtain an address for the
2921 autoreply, Exim could try to deliver to a non-existent relative file
2922 name, causing unrelated and misleading errors. What now happens is that
2923 it logs this as a hard delivery error, but does not attempt to create a
2926 PH/11 The exinext utility has a -C option for testing purposes, but although
2927 the given file was scanned by exinext itself; it wasn't being passed on
2928 when Exim was called.
2930 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2931 an end-of-file indication when reading a command response.
2933 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2934 compiled. In many other places in Exim, IPv6 addresses are always
2935 recognized, so I have changed this. It also means that IPv4 domain
2936 literals of the form [IPV4:n.n.n.n] are now always recognized.
2938 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2939 used if the router is not running as root, for example, when verifying at
2940 ACL time, or when using -bh. The debugging output from this situation was
2941 non-existent - all you got was a failure to exec. I have made two
2944 (a) Failures to set uid/gid, the current directory, or a process leader
2945 in a subprocess such as that created by queryprogram now generate
2946 suitable debugging output when -d is set.
2948 (b) The queryprogram router detects when it is not running as root,
2949 outputs suitable debugging information if -d is set, and then runs
2950 the subprocess without attempting to change uid/gid.
2952 PH/15 Minor change to Makefile for building test_host (undocumented testing
2955 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2956 additional section of a DNS packet that returns MX or SRV records.
2957 Instead, it always explicitly searches for A/AAAA records. This avoids
2958 major problems that occur when a DNS server includes only records of one
2959 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2960 fixed another bug: if SRV records were looked up and the corresponding
2961 address records were *not* found in the additional section, the port
2962 values from the SRV records were lost.
2964 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2965 using the correct key (the original address) when searching the retry
2966 rules in order to find which one to use for generating the retry hint.
2968 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2969 adding the default one. Similarly, if it contains a Reply-To: header, the
2970 errors_reply_to option, if set, is not used.
2972 PH/19 When calculating a retry time, Exim used to measure the "time since
2973 failure" by looking at the "first failed" field in the retry record. Now
2974 it does not use this if it is later than than the arrival time of the
2975 message. Instead it uses the arrival time. This makes for better
2976 behaviour in cases where some deliveries succeed, thus re-setting the
2977 "first failed" field. An example is a quota failure for a huge message
2978 when small messages continue to be delivered. Without this change, the
2979 "time since failure" will always be short, possible causing more frequent
2980 delivery attempts for the huge message than are intended.
2981 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2983 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2984 $1, $2, $3) because the numerical variables can be reset during some
2985 expansion items (e.g. "match"), thereby losing the authentication data.
2987 PH/21 Make -bV show the size of off_t variables so that the test suite can
2988 decide whether to run tests for quotas > 2G.
2990 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2991 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2992 filecount value is greater than 2G or if a quota value is greater than 2G
2993 on a system where the size of off_t is not greater than 4, a panic error
2996 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2997 never match. The debug and -bh output now contains an explicit error
2998 message indicating a malformed IPv4 address or mask.
3000 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3001 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3002 PH/23 above applies.
3004 PH/25 Do not write to syslog when running in the test harness. The only
3005 occasion when this arises is a failure to open the main or panic logs
3006 (for which there is an explicit test).
3008 PH/26 Added the /no_tell option to "control=freeze".
3010 PH/27 If a host name lookup failed very early in a connection, for example, if
3011 the IP address matched host_lookup and the reverse lookup yielded a name
3012 that did not have a forward lookup, an error message of the form "no IP
3013 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3014 could be logged. Now it outputs the IP address instead of "NULL".
3016 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3017 allows the sender and the authenticated sender to be set when
3018 submitting a message from within Exim. Since child_open_exim() is
3019 documented for local_scan(), the new function should be too.
3021 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3022 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3023 results in an empty string is now treated as unset.
3025 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3027 PH/31 Added sender_verify_fail logging option.
3029 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3030 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3031 tidied the source and removed it altogether.
3033 PH/33 When a queue run was abandoned because the load average was too high, a
3034 log line was always written; now it is written only if the queue_run log
3035 selector is set. In addition, the log line for abandonment now contains
3036 information about the queue run such as the pid. This is always present
3037 in "start" and "stop" lines but was omitted from the "abandon" line.
3039 PH/34 Omit spaces between a header name and the colon in the error message that
3040 is given when verify = headers_syntax fails (if there are lots of them,
3041 the message gets confusing).
3043 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3044 names, as there are now some PTR records that contain slashes. This check
3045 is only to protect against broken name servers that fall over on strange
3046 characters, so the fact that it applies to all lookups doesn't matter.
3048 PH/36 Now that the new test suite is complete, we can remove some of the
3049 special code in Exim that was needed for the old test suite. For example,
3050 sorting DNS records because real resolvers return them in an arbitrary
3051 order. The new test suite's fake resolver always returns records in the
3054 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3055 bounces) except when queue_only is set, to avoid logging races between
3056 the different processes.
3058 PH/38 Panic-die if .include specifies a non-absolute path.
3060 PH/39 A tweak to the "H" retry rule from its user.
3062 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3063 a label. They prevented compilation on older perls.
3065 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3066 a warning to be raised on newish perls.
3068 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3069 on queue. Changes to match documented behaviour of showing count of
3070 messages matching specified criteria.
3072 PH/40 Changed the default ident timeout from 30s to 5s.
3074 PH/41 Added support for the use of login_cap features, on those BSD systems
3075 that have them, for controlling the resources used by pipe deliveries.
3077 PH/42 The content-scanning code uses fopen() to create files in which to put
3078 message data. Previously it was not paying any attention to the mode of
3079 the files. Exim runs with umask(0) because the rest of the code creates
3080 files with open(), and sets the required mode explicitly. Thus, these
3081 files were ending up world-writeable. This was not a big issue, because,
3082 being within the spool directory, they were not world-accessible. I have
3083 created a function called modefopen, which takes an additional mode
3084 argument. It sets umask(777), creates the file, chmods it to the required
3085 mode, then resets the umask. All the relevant calls to fopen() in the
3086 content scanning code have been changed to use this function.
3088 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3089 to 24 hours. This avoids potential overflow problems when processing G
3090 and H retry rules. I suspect nobody ever tinkers with this value.
3092 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3094 PH/45 When the plaintext authenticator is running as a client, the server's
3095 challenges are checked to ensure they are valid base64 strings. By
3096 default, the authentication attempt is cancelled if an invalid string is
3097 received. Setting client_ignore_invalid_base64 true ignores these errors.
3098 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3099 they are received. Thus, the responses can be made to depend on the
3100 challenges. If an invalid string is ignored, an empty string is placed in
3103 PH/46 Messages that are created by the autoreply transport now contains a
3104 References: header, in accordance with RFCs 2822 and 3834.
3106 PH/47 Added authenticated_sender_force to the smtp transport.
3108 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3110 PH/49 Installed latest patch from the Sieve maintainer.
3112 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3113 was also set, the appendfile transport was unnecessarily scanning a
3114 directory of message files (e.g. for maildir delivery) to find the count
3115 of files (along with the size), even though it did not need this
3116 information. It now does the scan only if it needs to find either the
3117 size of the count of files.
3119 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3121 PH/52 Two bugs concerned with error handling when the smtp transport is
3124 (i) Exim was not creating retry information for temporary errors given
3125 for individual recipients after the DATA command when the smtp transport
3126 was used in LMTP mode. This meant that they could be retried too
3127 frequently, and not timed out correctly.
3129 (ii) Exim was setting the flag that allows error details to be returned
3130 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3131 recipients that were returned after the DATA command.
3133 PH/53 This is related to PH/52, but is more general: for any failing address,
3134 when detailed error information was permitted to be returned to the
3135 sender, but the error was temporary, then after the final timeout, only
3136 "retry timeout exceeded" was returned. Now it returns the full error as
3137 well as "retry timeout exceeded".
3139 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3140 do this, and (what is worse) MTAs that accept it.
3142 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3143 will now be deprecated.
3145 PH/56 New os.c-cygwin from the Cygwin maintainer.
3147 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3148 formats (previously only available in exim formats via -bpr, -bpru,
3149 and -bpra. Now also available in native and exiqgrep formats)
3151 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3152 with very large, slow to parse queues
3154 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3156 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3158 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3159 responses to authentication challenges, though it was showing the
3160 challenges; (ii) I've removed the CR characters from the debug output for
3163 PH/58 Allow for the insertion of a newline as well as a space when a string
3164 is turned into more than one encoded-word during RFC 2047 encoding. The
3165 Sieve code now uses this.
3167 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3168 data_4xx, lost_connection, tls_required.
3170 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3171 message was being sent as an SMTP response.
3173 PH/61 Add -l and -k options to exicyclog.
3175 PH/62 When verifying, if an address was redirected to one new address, so that
3176 verification continued, and the new address failed or deferred after
3177 having set something in $address_data, the value of $address_data was not
3178 passed back to the ACL. This was different to the case when no
3179 redirection occurred. The value is now passed back in both cases.
3181 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3182 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3183 use login_cap.h, so on its own it isn't the distinguishing feature. The
3184 new name refers directly to the setclassresources() function.
3186 PH/65 Added configuration files for NetBSD3.
3188 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3190 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3191 is preferred over IPv4.
3193 PH/68 The bounce_return_message and bounce_return_body options were not being
3194 honoured for bounces generated during the reception of non-SMTP messages.
3195 In particular, this applied to messages rejected by the ACL. This bug has
3196 been fixed. However, if bounce_return_message is true and bounce_return_
3197 body is false, the headers that are returned for a non-SMTP message
3198 include only those that have been read before the error was detected.
3199 (In the case of an ACL rejection, they have all been read.)
3201 PH/69 The HTML version of the specification is now built in a directory called
3202 spec_html instead of spec.html, because the latter looks like a path with
3203 a MIME-type, and this confuses some software.
3205 PH/70 Catch two compiler warnings in sieve.c.
3207 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3208 function verify_get_ident() calls ip_connect() to connect a socket, but
3209 if the "connect()" function timed out, ip_connect() used to close the
3210 socket. However, verify_get_ident() also closes the socket later, and in
3211 between Exim writes to the log, which may get opened at this point. When
3212 the socket was closed in ip_connect(), the log could get the same file
3213 descriptor number as the socket. This naturally causes chaos. The fix is
3214 not to close the socket in ip_connect(); the socket should be closed by
3215 the function that creates it. There was only one place in the code where
3216 this was missing, in the iplookup router, which I don't think anybody now
3217 uses, but I've fixed it anyway.
3219 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3220 well as to direct DNS lookups. Otherwise the handling of names in host
3221 lists is inconsistent and therefore confusing.
3227 PH/01 Two changes to the default runtime configuration:
3229 (1) Move the checks for relay_from_hosts and authenticated clients from
3230 after to before the (commented out) DNS black list checks.
3232 (2) Add control=submission to the relay_from_hosts and authenticated
3233 clients checks, on the grounds that messages accepted by these
3234 statements are most likely to be submissions.
3236 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3238 (1) Generate an error if the third argument for the ${prvs expansion is
3241 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3244 (3) Reset the variables that are obtained from the first argument of
3245 ${prvscheck and used in the second argument before leaving the code,
3246 because their memory is reclaimed, so using them afterwards may do
3249 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3250 one (it's much easier than Tom thought :-).
3252 (5) Because of (4), we can now allow for the use of $prvscheck_result
3253 inside the third argument.
3255 PH/03 For some reason, the default setting of PATH when running a command from
3256 a pipe transport was just "/usr/bin". I have changed it to
3259 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3260 anything to be listed in the output from -bV.
3262 PH/05 When a filter generated an autoreply, the entire To: header line was
3263 quoted in the delivery log line, like this:
3265 => >A.N.Other <ano@some.domain> <original@ddress> ...
3267 This has been changed so that it extracts the operative address. There
3268 may be more than one such address. If so, they are comma-separated, like
3271 => >ano@some.domain,ona@other.domain <original@ddress> ...
3273 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3274 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3275 not being looked up in the rDNS to get a host name, Exim was showing the
3276 IP address twice in Received: lines, even though the IP addresses were
3277 identical. For example:
3279 Received: from [1.2.3.4] (helo=[1.2.3.4])
3281 However, if the real host name was known, it was omitting the HELO data
3282 if it matched the actual IP address. This has been tidied up so that it
3283 doesn't show the same IP address twice.
3285 PH/07 When both +timestamp and +memory debugging was on, the value given by
3286 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3287 called by the debug printing, thereby overwriting the timestamp buffer.
3288 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3290 PH/08 When the original message was included in an autoreply transport, it
3291 always said "this is a copy of the message, including all the headers",
3292 even if body_only or headers_only was set. It now gives an appropriate
3295 PH/09 Applied a patch from the Sieve maintainer which:
3297 o fixes some comments
3298 o adds the (disabled) notify extension core
3299 o adds some debug output for the result of if/elsif tests
3300 o points to the current vacation draft in the documentation
3301 and documents the missing references header update
3305 o fixes a bug in processing the envelope test (when testing
3306 multiple envelope elements, the last element determined the
3309 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3310 Electronic Mail") by including:
3312 Auto-submitted: auto-generated
3314 in the messages that it generates (bounce messages and others, such as
3315 warnings). In the case of bounce messages for non-SMTP messages, there was
3316 also a typo: it was using "Auto_submitted" (underscore instead of
3317 hyphen). Since every message generated by Exim is necessarily in response
3318 to another message, thes have all been changed to:
3320 Auto-Submitted: auto-replied
3322 in accordance with these statements in the RFC:
3324 The auto-replied keyword:
3326 - SHOULD be used on messages sent in direct response to another
3327 message by an automatic process,
3329 - MUST NOT be used on manually-generated messages,
3331 - MAY be used on Delivery Status Notifications (DSNs) and Message
3332 Disposition Notifications (MDNs),
3334 - MUST NOT be used on messages generated by automatic or periodic
3335 processes, except for messages which are automatic responses to
3338 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3339 to the default Received: header definition.
3341 PH/12 Added log selector acl_warn_skipped (default on).
3343 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3344 variables because (a) they are in the wrong storage pool and (b) even if
3345 they were copied, it wouldn't work properly because of the caching.
3347 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3348 checking when decoding. Apparently there are clients that generate
3349 overlong encoded strings. Why am I not surprised?
3351 PH/15 If the first argument of "${if match_address" was not empty, but did not
3352 contain an "@" character, Exim crashed. Now it writes a panic log message
3353 and treats the condition as false.
3355 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3357 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3358 extension "envelope-auth". The code is finished and in agreement with
3359 other implementations, but there is no documentation so far and in fact,
3360 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3361 not changing the active code.
3363 Print executed "if" and "elsif" statements when debugging is used. This
3364 helps a great deal to understand what a filter does.
3366 Document more things not specified clearly in RFC3028. I had all this
3367 sorted out, when out of a sudden new issues came to my mind. Oops."
3369 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3372 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3373 canonical form (as documented). However, after a host name lookup from
3374 the IP address, check_host() was doing a simple string comparison with
3375 addresses acquired from the DNS when checking that the found name did
3376 have the original IP as one of its addresses. Since any found IPv6
3377 addresses are likely to be in abbreviated form, the comparison could
3378 fail. Luckily, there already exists a function for doing the comparison
3379 by converting both addresses to binary, so now that is used instead of
3380 the text comparison.
3382 PH/20 There was another similar case to PH/19, when a complete host name was
3383 given in a host list; looking up its IP address could give an abbreviated
3384 form, whereas the current host's name might or might not be abbreviated.
3385 The same fix has been applied.
3391 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3392 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3395 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3396 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3398 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3400 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3401 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3402 Also, for "Auto-Submitted", treat anything other than "no" as
3403 non-personal, in accordance with RFC 3834. (Previously it treated
3404 anything starting "auto-" as non-personal.)
3406 TF/01 The control=submission/name=... option had a problem with syntax
3407 errors if the name included a slash character. The /name= option
3408 now slurps the rest of the string, so it can include any characters
3409 but it must come last in the list of options (after /sender_retain
3412 PH/05 Some modifications to the interface to the fake nameserver for the new
3420 TK/01 Added the "success_on_redirect" address verification option. See
3421 NewStuff for rationale and an example.
3423 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3425 PH/02 Patch to exigrep to allow it to work on syslog lines.
3427 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3428 fread() to skip over the body file's header line, because in Cygwin the
3429 header line is locked and is inaccessible.
3431 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3432 co-exist for some time) to make it clear that it is the Exim ID that is
3433 referenced, not the Message-ID: header line.
3435 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3436 string_format() function, because snprintf() does not exist on all
3439 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3440 ${stat: expansion item.
3442 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3443 protocol synchronization error", to keep the pedants happy.
3445 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3446 well as for IRIX systems, when gcc is being used. See the host.c source
3449 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3451 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3454 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3455 transport and to the smtp transport in LMTP mode.
3457 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3459 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3460 run a filter in a subprocess. This could lead to confusion in subsequent
3461 lookups in the parent process. There should also be a search_tidyup() at
3462 the end of the subprocess.
3464 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3465 only if the host matched helo_try_verify_hosts, which caused the
3466 verification to occur when the EHLO/HELO command was issued. The ACL just
3467 tested the remembered result. Now, if a previous verification attempt has
3468 not happened, "verify = helo" does it there and then.
3470 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3472 TK/03 Fix log output including CR from clamd.
3474 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3475 exist provoked a memory error which could cause a segfault.
3477 PH/15 Installed PCRE 6.2
3479 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3481 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3482 of the problem. Specifically, suggested +O2 rather than +O1 for the
3485 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3487 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3488 record, the port was not correctly logged when the outgoing_port log
3489 selector was set (it logged the transort's default port).
3491 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3492 fallback_hosts, and "hosts" in the smtp transport.
3494 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3495 host errors such as "Connection refused".
3497 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3498 authentication with radiusclient 0.4.9:
3500 - Error returned from rc_read_config was caught wrongly
3501 - Username/password not passed on to radius server due to wrong length.
3503 The presumption is that some radiusclient API changes for 4.51/PH/17
3504 were not taken care of correctly. The code is still untested by me (my
3505 Linux distribution still has 0.3.2 of radiusclient), but it was
3506 contributed by a Radius user.
3508 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3509 expanding the "port" option of the smtp transport.
3511 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3512 while reading a MIME header. Thanks to Tom Hughes for a patch.
3514 PH/24 Include config.h inside local_scan.h so that configuration settings are
3517 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3518 that in an ACL for RCPT (for example), you can examine exactly what was
3521 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3522 commands, but it was not correctly comparing the address with the actual
3523 client host address. Thus, it would show the EHLO address in Received:
3524 header lines when this was not necessary.
3526 PH/27 Added the % operator to ${eval:}.
3528 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3529 it should be ignoring failures (because with -C, for example, it has lost
3530 privilege). It wasn't ignoring creation failures other than "already
3533 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3536 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3537 because an input line was too long, either on its own, or by virtue of
3538 too many continuations, the temporary file was not being removed, and the
3539 return code was incorrect.
3541 PH/31 Missing "BOOL" in function definition in filtertest.c.
3543 PH/32 Applied Sieve patches from the maintainer.
3545 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3547 PH/33 Added "verify = not_blind".
3549 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3550 Local/Makefile (with some defaults set). These are used in built scripts
3551 such as exicyclog, but they have never been used in the exim_install
3552 script (though there are many overriding facilities there). I have
3553 arranged that the exim_install script now takes note of these two
3556 PH/35 Installed configuration files for Dragonfly.
3558 PH/36 When a locally submitted message by a trusted user did not contain a
3559 From: header, and the sender address was obtained from -f or from an SMTP
3560 MAIL command, and the trusted user did not use -F to supply a sender
3561 name, $originator_name was incorrectly used when constructing a From:
3562 header. Furthermore, $originator_name was used for submission mode
3563 messages from external hosts without From: headers in a similar way,
3564 which is clearly wrong.
3566 PH/37 Added control=suppress_local_fixups.
3568 PH/38 When log_selector = +received_sender was set, and the addition of the
3569 sender made the log line's construction buffer exactly full, or one byte
3570 less than full, an overflow happened when the terminating "\n" was
3573 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3574 when the result of a list match is failure because a DNS lookup failed.
3576 PH/40 RM_COMMAND is now used in the building process.
3578 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3579 the "build-* directories that it finds.
3581 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3582 address in a domain literal was a prefix of an interface address.
3584 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3585 when verifying a sender address, unless rewrite_headers is false.
3587 PH/44 Wrote a long comment about why errors_to addresses are verified as
3588 recipients, not senders.
3590 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3591 the ratelimit ACL was added.
3593 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3595 PH/46 Added extra information about PostgreSQL errors to the error string.
3597 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3598 avoiding the need to install special zones in a real server. This is
3599 backwards compatible; if it can't find the fake resolver, it drops back.
3600 Thus, both old and new test suites can be run.
3602 TF/02 Added util/ratelimit.pl
3604 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3605 clock is set back in time.
3607 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3608 Candler <B.Candler@pobox.com>.
3610 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3611 OK for addresses that are the result of redirections.
3613 PH/48 A number of further additions for the benefit of the new test suite,
3614 including a fake gethostbyname() that interfaces to the fake DNS resolver
3617 TF/06 The fix for widen_domains has also been applied to qualify_single and
3618 search_parents which are the other dnslookup options that can cause
3621 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3624 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3626 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3627 service" if it encountered an MX record with an empty target hostname.
3628 The message is now "an MX or SRV record indicated no SMTP service".
3630 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3631 if the DNS of the sending site is misconfigured. This is quite a
3632 common situation. This change restores the behaviour of treating a
3633 helo verification defer as a failure.
3635 PH/51 If self=fail was set on a router, the bounce message did not include the
3636 actual error message.
3642 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3644 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3645 command itself ended in error, the underlying message about the transport
3646 filter timeout was being overwritten with the pipe command error. Now the
3647 underlying error message should be appended to the second error message.
3649 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3651 PH/02 Reduce the amount of output that "make" produces by default. Full output
3652 can still be requested.
3654 PH/03 The warning log line about a condition test deferring for a "warn" verb
3655 was being output only once per connection, rather than after each
3656 occurrence (because it was using the same function as for successful
3657 "warn" verbs). This seems wrong, so I have changed it.
3659 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3660 it should not have, which might have caused a crash in the right
3661 circumstances, but probably never did.
3663 PH/04 Installed a modified version of Tony Finch's patch to make submission
3664 mode fix the return path as well as the Sender: header line, and to
3665 add a /name= option so that you can make the user's friendly name appear
3668 TF/03 Added the control = fakedefer ACL modifier.
3670 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3671 Mark Lowes for thorough testing.
3673 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3675 TK/03 Merged latest SRS patch from Miles Wilton.
3677 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3678 with the definition in sysexits.h (which is #included earlier).
3679 Fortunately, Exim does not actually use EX_OK. The code used to try to
3680 preserve the sysexits.h value, by assuming that macro definitions were
3681 scanned for macro replacements. I have been disabused of this notion,
3682 so now the code just undefines EX_OK before #including unistd.h.
3684 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3685 in the smtp transport. When a block could not be written in a single
3686 write() function, the timeout was being re-applied to each part-write.
3687 This seems wrong - if the receiver was accepting one byte at a time it
3688 would take for ever. The timeout is now adjusted when this happens. It
3689 doesn't have to be particularly precise.
3691 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3692 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3694 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3695 without a domain if the check to <postmaster@domain> fails.
3697 SC/01 Eximstats: added -xls and the ability to specify output files
3698 (patch written by Frank Heydlauf).
3700 SC/02 Eximstats: use FileHandles for outputting results.
3702 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3704 SC/04 Eximstats: fixed display of large numbers with -nvr option
3706 SC/05 Eximstats: fixed merging of reports with empty tables.
3708 SC/06 Eximstats: added the -include_original_destination flag
3710 SC/07 Eximstats: removed tabs and trailing whitespace.
3712 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3714 TK/06 MBOX spool code: Add real "From " MBOX separator line
3715 so the .eml file is really in mbox format (even though
3716 most programs do not really care). Patch from Alex Miller.
3718 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3719 The latter is generated from $received_to and is only set if the
3720 message has one envelope recipient. SA can use these headers,
3721 obviously out-of-the-box. Patch from Alex Miller.
3723 PH/08 The ${def test on a variable was returning false if the variable's
3724 value was "0", contrary to what the specification has always said!
3725 The result should be true unless the variable is empty.
3727 PH/09 The syntax error of a character other than { following "${if
3728 def:variable_name" (after optional whitespace) was not being diagnosed.
3729 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3730 accidental colon was present, for example, could give incorrect results.
3732 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3733 result is used (not including appendfile, where other changes are about
3736 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3737 This involved changing a lot of size variables from int to off_t. It
3738 should work with maildirs and everything.
3740 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3741 spamd dying while we are connected to it.
3743 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3746 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3747 function for BDB 4.3.
3749 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3751 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3752 the sources for PCRE have been re-arranged and more files are now
3755 PH/15 The code I had for printing potentially long long variables in PH/11
3756 above was not the best (it lost precision). The length of off_t variables
3757 is now inspected at build time, and an appropriate printing format (%ld
3758 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3759 to be "long long int" or "long int". This is needed for the internal
3760 formatting function string_vformat().
3762 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3763 the configuration file to be ":syslog", then the script "guesses" where
3764 the logs files are, rather than using the compiled in default. In our
3765 case the guess is not the same as the compiled default, so the script
3766 suddenly stopped working when I started to use syslog. The patch checks
3767 to see if log_file_path is "". If so, it attempts to read it from exim
3768 with no configuration file to get the compiled in version, before it
3769 falls back to the previous guessing code."
3771 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3772 implementing BATV in an Exim configuration. See NewStuff for the gory
3775 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3776 Makefile that are specific to HP-UX.
3778 PH/18 If the "use_postmaster" option was set for a recipient callout together
3779 with the "random" option, the postmaster address was used as the MAIL
3780 FROM address for the random test, but not for the subsequent recipient
3781 test. It is now used for both.
3783 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3784 patch removes a few documentation additions to RFC 3028, because the
3785 latest draft now contains them. It adds the new en;ascii-case comparator
3786 and a new error check for 8bit text in MIME parts. Comparator and
3787 require names are now matched exactly. I enabled the subaddress
3788 extension, but it is not well tested yet (read: it works for me)."
3790 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3791 rework some of the code of TK/09 above to avoid the hardwired use of
3792 "%lld" and "long long". Replaced the call to snprintf() with a call to
3795 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3796 records point to non-existent hosts", "retry timeout exceeded", and
3797 "retry time not reached for any host after a long failure period".
3799 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3800 experimental DomainKeys support:
3802 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3803 (2) On an error such as an illegally used "control", the wrong name for
3804 the control was given.
3806 These problems did NOT occur unless DomainKeys support was compiled.
3808 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3810 PH/24 Added ${if match_ip condition.
3812 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3813 databases so that it will be absolutely obvious if a crash occurs in the
3814 DB library. This is a regular occurrence (often caused by mis-matched
3817 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3818 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3819 picked up on a user's system that detects such things. There doesn't seem
3820 to be a gcc warning option for this - only an attribute that has to be
3821 put on the function's prototype. It seems that in Fedora Core 4 they have
3822 set this on a number of new functions. No doubt there will be more in due
3825 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3826 specify a transport. However, if an address that was verified by such a
3827 router was the subject of a callout, Exim crashed because it tried to
3828 read the rcpt_include_affixes from the non-existent transport. Now it
3829 just assumes that the setting of that option is false. This bug was
3830 introduced by 4.51/PH/31.
3832 PH/28 Changed -d+all to exclude +memory, because that information is very
3833 rarely of interest, but it makes the output a lot bigger. People tend to
3834 do -d+all out of habit.
3836 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3837 code in os-type was giving problems when libc.so lives in lib64, like on
3840 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3841 aren't the modern standard, and it seems that some systems' include files
3842 don't always have them. Exim was already checking for some of the newer
3843 ones like T_AAAA, and defining it itself. I've added checks for all the
3844 record types that Exim uses.
3846 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3847 not automatically generating a new one, as it is supposed to. This
3848 prevented TLS from working. If the file did exist, but contained invalid
3849 data, a new version was generated, as expected. It was only the case of a
3850 non-existent file that was broken.
3852 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3853 with a change in libdomainkeys > 0.64.
3855 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3856 from DNS. If the selector record carries the flag, it now has
3857 precedence over the domain-wide flag.
3859 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3861 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3862 the use of a port name that isn't defined in /etc/services) occurred, the
3863 message was deferred as in a normal delivery, and thus remained on the
3864 spool, instead of being failed because of the mua_wrapper setting. This
3865 is now fixed, and I tidied up some of the mua_wrapper messages at the
3868 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3869 the messages in a hash of arrays rather than using individual hashes.
3870 This is a bit cleaner and results in dramatic memory savings, albeit
3871 at a slight CPU cost.
3873 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3874 as requested by Marc Sherman.
3876 SC/10 Eximstats: added histograms for user specified patterns as requested
3879 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3881 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3882 fopen() in the content-scanning modules that did not already have it.
3888 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3889 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3891 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3893 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3895 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3896 to test Sieve filters that use "vacation".
3898 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3899 that changes the way the GnuTLS parameters are stored in the cache file.
3900 The new format can be generated externally. For backward compatibility,
3901 if the data in the cache doesn't make sense, Exim assumes it has read an
3902 old-format file, and it generates new data and writes a new file. This
3903 means that you can't go back to an older release without removing the
3906 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3907 work if there are any delivery delays because "one_time" forces the
3908 parent to be marked "delivered", so its unseen clone is never tried
3909 again. For this reason, Exim now forbids the simultaneous setting of
3912 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3913 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3914 entry if you want to know the details. The fix, however, neglected to
3915 consider the case when local delivery batching is involved. The test for
3916 "previously delivered" was not happening when checking to see if an
3917 address could be batched with a previous (undelivered) one; under
3918 certain circumstances this could lead to multiple deliveries to the same
3921 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3922 in its include files, and this causes problems building Exim.
3924 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3925 header_syntax) but Exim was just ignoring anything given after a slash.
3926 In particular, this caused confusion with an attempt to use "verify =
3927 reverse_host_lookup/defer_ok". An error is now given when options are
3928 supplied for verify items that do not have them. (Maybe reverse_host_
3929 lookup should have a defer_ok option, but that's a different point.)
3931 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3932 defined by RFC 821) to 2048, because there were problems with some AUTH
3933 commands, and RFC 1869 says the size should be increased for extended
3934 SMTP commands that take arguments.
3936 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3939 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3940 "unknown" error; now it says that the functionality isn't in the binary.
3942 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3943 an address' error message when a string expansion fails (syntax or
3944 whatever). Otherwise the password may appear in the log. Following change
3945 PH/42 below, there is no longer a chance of it appearing in a bounce
3948 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3950 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3951 of its addresses was ever tried. (Bugzilla bug #2.)
3953 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3954 the result incorrectly in the debug output. (It correctly added a newline
3955 to what was transported.)
3957 TF/01 Added $received_time.
3959 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3960 commented out examples of how to interface to a virus scanner and to
3961 SpamAssassin. Also added commented examples of av_scanner and
3962 spamd_address settings.
3964 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3965 and controls are allowed in which ACLs. There were a couple of minor
3966 errors. Some of the entries in the conditions table (which is a table of
3967 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3968 negation of where the condition IS allowed.
3970 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3972 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3973 header file does not have a version number, so I've had to invent a new
3974 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3975 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3976 radiusclient), but it was contributed by a Radius user.
3978 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3979 files or directories, for OpenSSL.
3981 PH/19 When an Exim process that is running as root has to create an Exim log
3982 file, it does so in a subprocess that runs as exim:exim so as to get the
3983 ownership right at creation (otherwise, other Exim processes might see
3984 the file with the wrong ownership). There was no test for failure of this
3985 fork() call, which would lead to the process getting stuck as it waited
3986 for a non-existent subprocess. Forks do occasionally fail when resources
3987 run out. I reviewed all the other calls to fork(); they all seem to check
3990 PH/20 When checking for unexpected SMTP input at connect time (before writing
3991 the banner), Exim was not dealing correctly with a non-positive return
3992 from the read() function. If the client had disconnected by this time,
3993 the result was a log entry for a synchronization error with an empty
3994 string after "input=" when read() returned zero. If read() returned -1
3995 (an event I could not check), uninitialized data bytes were printed.
3996 There were reports of junk text (parts of files, etc) appearing after
3999 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4001 PH/22 Added support for macro redefinition, and (re)definition in between
4002 driver and ACL definitions.
4004 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4005 forgetting to use the resulting value; it was using the unexpanded value.
4007 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4008 hadn't been configured. The fix is from Juergen Kreileder, who
4009 understands it better than I do:
4011 "Here's what I see happening with three configured cyrus_sasl
4012 authenticators configured (plain, login, cram-md5):
4014 On startup auth_cyrus_sasl_init() gets called for each of these.
4015 This means three calls to sasl_listmech() without a specified mech_list.
4016 => SASL tests which mechs of all available mechs actually work
4017 => three warnings about OTP not working
4018 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4020 With the patch, sasl_listmech() also gets called three times. But now
4021 SASL's mech_list option is set to the server_mech specified in the the
4022 authenticator. Or in other words, the answer from sasl_listmech()
4023 gets limited to just the mech you're testing for (which is different
4025 => the return list contains just 'plain' or 'login', 'cram-md5' or
4026 nothing depending on the value of ob->server_mech.
4028 I've just tested the patch: Authentication still works fine,
4029 unavailable mechs specified in the exim configuration are still
4030 caught, and the auth.log warnings about OTP are gone."
4032 PH/25 When debugging is enabled, the contents of the command line are added
4033 to the debugging output, even when log_selector=+arguments is not
4036 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4037 answer is "GNU", and only if the return is "GNU/something" is the answer
4040 PH/27 $acl_verify_message is now set immediately after the failure of a
4041 verification in an ACL, and so is available in subsequent modifiers. In
4042 particular, the message can be preserved by coding like this:
4044 warn !verify = sender
4045 set acl_m0 = $acl_verify_message
4047 Previously, $acl_verify_message was set only while expanding "message"
4048 and "log_message" when a very denied access.
4050 PH/28 Modified OS/os.c-Linux with
4052 -#ifndef OS_LOAD_AVERAGE
4053 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4055 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4056 nomenclature these days.)
4058 PH/29 Installed patch from the Sieve maintainer that adds the options
4059 sieve_useraddress and sieve_subaddress to the redirect router.
4061 PH/30 In these circumstances:
4062 . Two addresses routed to the same list of hosts;
4063 . First host does not offer TLS;
4064 . First host accepts first address;
4065 . First host gives temporary error to second address;
4066 . Second host offers TLS and a TLS session is established;
4067 . Second host accepts second address.
4068 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4069 and peerdn, if requested) that were in fact used only for the second
4072 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4073 attention to any local part prefix or suffix that was matched by the
4074 router that accepted the address. It now behaves in the same way as it
4075 does for delivery: the affixes are removed from the local part unless
4076 rcpt_include_affixes is set on the transport.
4078 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4079 timeout during the DATA phase of an incoming message.
4081 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4082 applied a patch sanctioned by the Sieve maintainer.
4084 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4085 the uid or gid is negative. A case of a negative gid caused this to be
4086 noticed. The fix allows for either to be negative.
4088 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4089 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4092 PH/36 The change PH/12 above was broken. Fixed it.
4094 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4095 the grounds that routing the same address twice would always produce the
4096 same answer. This might have been true once, but it is certainly no
4097 longer true now. Routing a child address may depend on the previous
4098 routing that produced that child. Some complicated redirection strategies
4099 went wrong when messages had multiple recipients, and made Exim's
4100 behaviour dependent on the order in which the addresses were given.
4102 I have moved the duplicate checking until after the routing is complete.
4103 Exim scans the addresses that are assigned to local and remote
4104 transports, and removes any duplicates. This means that more work will be
4105 done, as duplicates will always all be routed, but duplicates are
4106 presumably rare, so I don't expect this is of any significance.
4108 For deliveries to pipes, files, and autoreplies, the duplicate checking
4109 still happens during the routing process, since they are not going to be
4112 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4113 It corrects a timeout issue with spamd. This is Ian's comment: "The
4114 background is that sometimes spamd either never reads data from a
4115 connection it has accepted, or it never writes response data. The exiscan
4116 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4117 blindly assumes that writes won't block so it may never time out."
4119 PH/39 Allow G after quota size as well as K and M.
4121 PH/40 The value set for $authenticated_id in an authenticator may not contain
4122 binary zeroes or newlines because the value is written to log lines and
4123 to spool files. There was no check on this. Now the value is run through
4124 the string_printing() function so that such characters are converted to
4125 printable escape sequences.
4127 PH/41 $message_linecount is a new variable that contains the total number of
4128 lines in the message. Compare $body_linecount, which is the count for the
4131 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4132 bounce and delay warning messages, except in certain special cases, which
4135 (a) An SMTP error message from a remote host;
4136 (b) A message specified in a :fail: redirection;
4137 (c) A message specified in a "fail" command in a system filter;
4138 (d) A message specified in a FAIL return from the queryprogram router;
4139 (e) A message specified by the cannot_route_message router option.
4141 In these cases only, Exim does include the error details in bounce and
4142 warning messages. There are also a few cases where bland messages such
4143 as "unrouteable address" or "local delivery error" are given.
4145 PH/43 $value is now also set for the "else" part of a ${run expansion.
4147 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4148 being worked on, but at least Exim now implements the latest version to
4151 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4152 process to complete was treated as a delivery failure, a timeout while
4153 writing the message to the pipe was logged, but erroneously treated as a
4154 successful delivery. Such timeouts include transport filter timeouts. For
4155 consistency with the overall process timeout, these timeouts are now
4156 treated as errors, giving rise to delivery failures by default. However,
4157 there is now a new Boolean option for the pipe transport called
4158 timeout_defer, which, if set TRUE, converts the failures into defers for
4159 both kinds of timeout. A transport filter timeout is now identified in
4162 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4163 systems where "make" and "gmake" are different, calling "gmake" at top
4164 level broke things. I've arranged for the value of $(MAKE) to be passed
4165 from the Makefile to this script so that it can call the same version of
4169 A note about Exim versions 4.44 and 4.50
4170 ----------------------------------------
4172 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4173 changes of various kinds. As a consequence, a big documentation update was
4174 needed. This delayed the release for rather longer than seemed good, especially
4175 in the light of a couple of (minor) security issues. Therefore, the changes
4176 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4177 release. So 4.44 and 4.50 are in effect two different branches that both start
4180 I have left the 4.50 change log unchanged; it contains all the changes since
4181 4.43. The change log for 4.44 is below; many of its items are identical to
4182 those for 4.50. This seems to be the most sensible way to preserve the
4183 historical information.
4189 1. Minor wording change to the doc/README.SIEVE file.
4191 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4192 computation of the current number of files was incorrect.
4194 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4195 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4198 4. Give more explanation in the error message when the command for a transport
4199 filter fails to execute.
4201 5. There are several places where Exim runs a non-Exim command in a
4202 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4203 was being done only for the command run by the queryprogram router. It is
4204 now done for all such subprocesses. The other cases are: ${run, transport
4205 filters, and the commands run by the lmtp and pipe transports.
4207 6. Added CONFIGURE_GROUP build-time option.
4209 7. Some older OS have a limit of 256 on the maximum number of file
4210 descriptors. Exim was using setrlimit() to set 1000 as a large value
4211 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4212 systems. I've change it so that if it can't get 1000, it tries for 256.
4214 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4215 was an oversight, and furthermore, ever since the addition of extra
4216 controls (e.g. 4.43/32), the checks on when to allow different forms of
4217 "control" were broken. There should now be diagnostics for all cases when a
4218 control that does not make sense is encountered.
4220 9. Added the /retain_sender option to "control=submission".
4222 10. $recipients is now available in the predata ACL (oversight).
4224 11. Tidy the search cache before the fork to do a delivery from a message
4225 received from the command line. Otherwise the child will trigger a lookup
4226 failure and thereby defer the delivery if it tries to use (for example) a
4227 cached ldap connection that the parent has called unbind on.
4229 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4230 of $address_data from the recipient verification was clobbered by the
4231 sender verification.
4233 13. The value of address_data from a sender verification is now available in
4234 $sender_address_data in subsequent conditions in the ACL statement.
4236 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4238 15. Added a new option "connect=<time>" to callout options, to set a different
4241 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4242 was its contents. (It was OK if the option was not defined at all.)
4244 17. A "Completed" log line is now written for messages that are removed from
4245 the spool by the -Mrm option.
4247 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4248 information about exactly what failed.
4250 19. Added -dd to debug only the daemon process.
4252 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4253 handles timeouts, both on the server side and network timeouts. Renamed the
4254 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4256 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4257 It is now set to "smtps".
4259 22. $host_address is now set to the target address during the checking of
4260 ignore_target_hosts.
4262 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4263 being passed; this would have caused $sender_host_name to have been used if
4264 matching the list had actually called for a host name (not very likely,
4265 since this list is usually IP addresses). A host name is now passed as
4268 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4269 code that specifies a non-restarting handler (typically sigaction() in
4270 modern systems) in an attempt to fix a rare and obscure crash bug.
4272 25. Narrowed the window for a race in the daemon that could cause it to ignore
4273 SIGCHLD signals. This is not a major problem, because they are used only to
4274 wake it up if nothing else does.
4276 26. A malformed maildirsize file could cause Exim to calculate negative values
4277 for the mailbox size or file count. Odd effects could occur as a result.
4278 The maildirsize information is now recalculated if the size or filecount
4281 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4282 support for a long time. Removed HAVE_SYS_VFS_H.
4284 28. Installed the latest version of exipick from John Jetmore.
4286 29. In an address list, if the pattern was not a regular expression, an empty
4287 subject address (from a bounce message) matched only if the pattern was an
4288 empty string. Non-empty patterns were not even tested. This was the wrong
4289 because it is perfectly reasonable to use an empty address as part of a
4290 database query. An empty address is now tested by patterns that are
4291 lookups. However, all the other forms of pattern expect the subject to
4292 contain a local part and a domain, and therefore, for them, an empty
4293 address still always fails if the pattern is not itself empty.
4295 30. Exim went into a mad DNS loop when attempting to do a callout where the
4296 host was specified on an smtp transport, and looking it up yielded more
4297 than one IP address.
4299 31. Re-factored the code for checking spool and log partition space into a
4300 function that finds that data and another that does the check. The former
4301 is then used to implement four new variables: $spool_space, $log_space,
4302 $spool_inodes, and $log_inodes.
4304 32. The RFC2047 encoding function was originally intended for short strings
4305 such as real names; it was not keeping to the 75-character limit for
4306 encoded words that the RFC imposes. It now respects the limit, and
4307 generates multiple encoded words if necessary. To be on the safe side, I
4308 have increased the buffer size for the ${rfc2047: expansion operator from
4311 33. It is now permitted to omit both strings after an "if" condition; if the
4312 condition is true, the result is "true". As before, when the second string
4313 is omitted, a false condition yields an empty string. This makes it less
4314 cumbersome to write custom ACL and router conditions.
4316 34. Failure to deliver a bounce message always caused it to be frozen, even if
4317 there was an errors_to setting on the router. The errors_to setting is now
4320 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4321 canonical form (fully expanded) before being placed in
4322 $sender_host_address.
4324 36. The table in the code that translates DNS record types into text (T_A to
4325 "A" for instance) was missing entries for NS and CNAME. It is just possible
4326 that this could have caused confusion if both these types were looked up
4327 for the same domain, because the text type is used as part of Exim's
4328 per-process caching. But the chance of anyone hitting this buglet seems
4331 37. The dnsdb lookup has been extended in a number of ways.
4333 (1) There is a new type, "zns", which walks up the domain tree until it
4334 finds some nameserver records. It should be used with care.
4336 (2) There is a new type, "mxh", which is like "mx" except that it returns
4337 just the host names, not the priorities.
4339 (3) It is now possible to give a list of domains (or IP addresses) to be
4340 looked up. The behaviour when one of the lookups defers can be
4341 controlled by a keyword.
4343 (4) It is now possible to specify the separator character for use when
4344 multiple records are returned.
4346 38. The dnslists ACL condition has been extended: it is now possible to supply
4347 a list of IP addresses and/or domains to be looked up in a particular DNS
4350 39. Added log_selector=+queue_time_overall.
4352 40. When running the queue in the test harness, wait just a tad after forking a
4353 delivery process, to get repeatability of debugging output.
4355 41. Include certificate and key file names in error message when GnuTLS fails
4356 to set them up, because the GnuTLS error message doesn't include the name
4357 of the failing file when there is a problem reading it.
4359 42. Allow both -bf and -bF in the same test run.
4361 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4363 44. The "Exiscan patch" is now merged into the mainline Exim source.
4365 45. Sometimes the final signoff response after QUIT could fail to get
4366 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4367 < 0 before doing a fflush(). This bug looks as though it goes back to the
4368 introduction of TLS in release 3.20, but "sometimes" must have been rare
4369 because the tests only now provoked it.
4371 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4372 (this can affect the format of dates).
4374 47. exim_tidydb, when checking for the continued existence of a message for
4375 which it has found a message-specific retry record, was not finding
4376 messages that were in split spool directories. Consequently, it was
4377 deleting retry records that should have stayed in existence.
4379 48. Steve fixed some bugs in eximstats.
4381 49. The SPA authentication driver was not abandoning authentication and moving
4382 on to the next authenticator when an expansion was forced to fail,
4383 contradicting the general specification for all authenticators. Instead it
4384 was generating a temporary error. It now behaves as specified.
4386 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4387 (the order specifies the preference for clients). The order is now AES256,
4388 AES128, 3DES, ARCFOUR128.
4390 51. Small patch to Sieve code - explicitly set From: when generating an
4393 52. Exim crashed if a remote delivery caused a very long error message to be
4394 recorded - for instance if somebody sent an entire SpamAssassin report back
4395 as a large number of 550 error lines. This bug was coincidentally fixed by
4396 increasing the size of one of Exim's internal buffers (big_buffer) that
4397 happened as part of the Exiscan merge. However, to be on the safe side, I
4398 have made the code more robust (and fixed the comments that describe what
4401 53. Now that there can be additional text after "Completed" in log lines (if
4402 the queue_time_overall log selector is set), a one-byte patch to exigrep
4403 was needed to allow it to recognize "Completed" as not the last thing in
4406 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4407 patch that reportedly fixes this has been added. I am not expert enough to
4408 create a test for it. This is what the patch creator wrote:
4410 "I found a little strange behaviour of ldap code when working with
4411 Windows 2003 AD Domain, where users was placed in more than one
4412 Organization Units. When I tried to give exim partial DN, the exit code
4413 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4414 But simultaneously result of request was absolutely normal ldap result,
4415 so I produce this patch..."
4417 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4418 REFERENCE, so I have modified the code to exclude the patch when that macro
4421 55. Some experimental protocols are using DNS PTR records for new purposes. The
4422 keys for these records are domain names, not reversed IP addresses. The
4423 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4424 leaves it alone. Component reversal etc. now happens only for IP addresses.
4427 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4429 57. Double the size of the debug message buffer (to 2048) so that more of very
4430 long debug lines gets shown.
4432 58. The exicyclog utility now does better if the number of log files to keep
4433 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4435 59. Two changes related to the smtp_active_hostname option:
4437 (1) $smtp_active_hostname is now available as a variable.
4438 (2) The default for smtp_banner uses $smtp_active_hostname instead
4439 of $primary_hostname.
4441 60. The host_aton() function is supposed to be passed a string that is known
4442 to be a valid IP address. However, in the case of IPv6 addresses, it was
4443 not checking this. This is a hostage to fortune. Exim now panics and dies
4444 if the condition is not met. A case was found where this could be provoked
4445 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4446 components; fortuitously, this particular loophole had already been fixed
4447 by change 4.50/55 above.
4449 If there are any other similar loopholes, the new check in host_aton()
4450 itself should stop them being exploited. The report I received stated that
4451 data on the command line could provoke the exploit when Exim was running as
4452 exim, but did not say which command line option was involved. All I could
4453 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4454 running as the user.
4457 61. There was a buffer overflow vulnerability in the SPA authentication code
4458 (which came originally from the Samba project). I have added a test to the
4459 spa_base64_to_bits() function which I hope fixes it.
4462 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4463 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4465 63. The daemon start-up calls getloadavg() while still root for those OS that
4466 need the first call to be done as root, but it missed one case: when
4467 deliver_queue_load_max is set with deliver_drop_privilege. This is
4468 necessary for the benefit of the queue runner, because there is no re-exec
4469 when deliver_drop_privilege is set.
4471 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4472 This has been fixed.
4474 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4475 was in use, was not putting the data itself into the right store pool;
4476 consequently, it could be overwritten for a subsequent message in the same
4477 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4480 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4482 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4483 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4484 the function were treating the return as a boolean value, which happened to
4485 work because 0=false and not-0=true, but is not correct code.
4487 68. The host_aton() function was not handling scoped IPv6 addresses (those
4488 with, for example, "%eth0" on the end) correctly.
4490 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4491 negated items (that is, ~something) in unsigned ints. Some compilers
4492 apparently mutter when there is no cast.
4494 70. If an address verification called from an ACL failed, and did not produce a
4495 user-specific message (i.e. there was only a "system" message), nothing was
4496 put in $acl_verify_message. In this situation, it now puts the system
4499 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4500 session; change 4.31/43 added the unwanted input to the log line - except
4501 that it did not do this in the start of session case. It now does.
4503 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4504 This is wrong and can cause the other end to generate a synchronization
4505 error if it is another Exim or anything else that does the synchronization
4506 check. A QUIT command is no longer sent after a timeout.
4508 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4509 during host lookups.
4511 74. The defer_ok option of callout verification was not working if it was used
4512 when verifying addresses in header lines, that is, for this case:
4514 verify = header_sender/callout=defer_ok
4516 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4517 those file descriptors could be used for SMTP connections. If anything
4518 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4519 could be sent to the SMTP client, causing chaos. The daemon now opens
4520 stdin, stdout, and stderr to /dev/null when it puts itself into the
4523 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4524 log by default. The user can override this with suitable Perl magic.
4526 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4527 the log message when discard triggers, was not working for the DATA ACL or
4528 for the non-SMTP ACL.
4530 78. Error message wording change in sieve.c.
4532 79. If smtp_accept_max_per_host was set, the number of connections could be
4533 restricted to fewer than expected, because the daemon was trying to set up
4534 a new connection before checking whether the processes handling previous
4535 connections had finished. The check for completed processes is now done
4536 earlier. On busy systems, this bug wouldn't be noticed because something
4537 else would have woken the daemon, and it would have reaped the completed
4540 80. If a message was submitted locally by a user whose login name contained one
4541 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4542 It caused a spool format error. I have fixed the spool reading code. A
4543 related problem was that the "from" clause in the Received: line became
4544 illegal because of the space(s). It is now covered by ${quote_local_part.
4546 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4549 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4551 83. Patch from Sieve maintainer to fix unterminated string problem in
4552 "vacation" handling.
4554 84. Some minor changes to the Linux configuration files to help with other
4555 OS variants using glibc.
4557 85. One more patch for Sieve to update vacation handling to latest spec.
4560 ----------------------------------------------------
4561 See the note above about the 4.44 and 4.50 releases.
4562 ----------------------------------------------------
4568 1. Change 4.43/35 introduced a bug that caused file counts to be
4569 incorrectly computed when quota_filecount was set in an appendfile
4572 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4573 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4576 3. Give more explanation in the error message when the command for a transport
4577 filter fails to execute.
4579 4. There are several places where Exim runs a non-Exim command in a
4580 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4581 was being done only for the command run by the queryprogram router. It is
4582 now done for all such subprocesses. The other cases are: ${run, transport
4583 filters, and the commands run by the lmtp and pipe transports.
4585 5. Some older OS have a limit of 256 on the maximum number of file
4586 descriptors. Exim was using setrlimit() to set 1000 as a large value
4587 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4588 systems. I've change it so that if it can't get 1000, it tries for 256.
4590 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4591 was an oversight, and furthermore, ever since the addition of extra
4592 controls (e.g. 4.43/32), the checks on when to allow different forms of
4593 "control" were broken. There should now be diagnostics for all cases when a
4594 control that does not make sense is encountered.
4596 7. $recipients is now available in the predata ACL (oversight).
4598 8. Tidy the search cache before the fork to do a delivery from a message
4599 received from the command line. Otherwise the child will trigger a lookup
4600 failure and thereby defer the delivery if it tries to use (for example) a
4601 cached ldap connection that the parent has called unbind on.
4603 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4604 of $address_data from the recipient verification was clobbered by the
4605 sender verification.
4607 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4608 was its contents. (It was OK if the option was not defined at all.)
4610 11. A "Completed" log line is now written for messages that are removed from
4611 the spool by the -Mrm option.
4613 12. $host_address is now set to the target address during the checking of
4614 ignore_target_hosts.
4616 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4617 being passed; this would have caused $sender_host_name to have been used if
4618 matching the list had actually called for a host name (not very likely,
4619 since this list is usually IP addresses). A host name is now passed as
4622 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4623 code that specifies a non-restarting handler (typically sigaction() in
4624 modern systems) in an attempt to fix a rare and obscure crash bug.
4626 15. Narrowed the window for a race in the daemon that could cause it to ignore
4627 SIGCHLD signals. This is not a major problem, because they are used only to
4628 wake it up if nothing else does.
4630 16. A malformed maildirsize file could cause Exim to calculate negative values
4631 for the mailbox size or file count. Odd effects could occur as a result.
4632 The maildirsize information is now recalculated if the size or filecount
4635 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4636 support for a long time. Removed HAVE_SYS_VFS_H.
4638 18. Updated exipick to current release from John Jetmore.
4640 19. Allow an empty sender to be matched against a lookup in an address list.
4641 Previously the only cases considered were a regular expression, or an
4644 20. Exim went into a mad DNS lookup loop when doing a callout where the
4645 host was specified on the transport, if the DNS lookup yielded more than
4648 21. The RFC2047 encoding function was originally intended for short strings
4649 such as real names; it was not keeping to the 75-character limit for
4650 encoded words that the RFC imposes. It now respects the limit, and
4651 generates multiple encoded words if necessary. To be on the safe side, I
4652 have increased the buffer size for the ${rfc2047: expansion operator from
4655 22. Failure to deliver a bounce message always caused it to be frozen, even if
4656 there was an errors_to setting on the router. The errors_to setting is now
4659 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4660 canonical form (fully expanded) before being placed in
4661 $sender_host_address.
4663 24. Updated eximstats to version 1.33
4665 25. Include certificate and key file names in error message when GnuTLS fails
4666 to set them up, because the GnuTLS error message doesn't include the name
4667 of the failing file when there is a problem reading it.
4669 26. Expand error message when OpenSSL has problems setting up cert/key files.
4672 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4673 (this can affect the format of dates).
4675 28. exim_tidydb, when checking for the continued existence of a message for
4676 which it has found a message-specific retry record, was not finding
4677 messages that were in split spool directories. Consequently, it was
4678 deleting retry records that should have stayed in existence.
4680 29. eximstats updated to version 1.35
4681 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4682 1.35 - bugfix such that pie charts by volume are generated correctly
4684 30. The SPA authentication driver was not abandoning authentication and moving
4685 on to the next authenticator when an expansion was forced to fail,
4686 contradicting the general specification for all authenticators. Instead it
4687 was generating a temporary error. It now behaves as specified.
4689 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4690 (the order specifies the preference for clients). The order is now AES256,
4691 AES128, 3DES, ARCFOUR128.
4693 31. Small patch to Sieve code - explicitly set From: when generating an
4696 32. Exim crashed if a remote delivery caused a very long error message to be
4697 recorded - for instance if somebody sent an entire SpamAssassin report back
4698 as a large number of 550 error lines. This bug was coincidentally fixed by
4699 increasing the size of one of Exim's internal buffers (big_buffer) that
4700 happened as part of the Exiscan merge. However, to be on the safe side, I
4701 have made the code more robust (and fixed the comments that describe what
4704 33. Some experimental protocols are using DNS PTR records for new purposes. The
4705 keys for these records are domain names, not reversed IP addresses. The
4706 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4707 leaves it alone. Component reversal etc. now happens only for IP addresses.
4710 34. The host_aton() function is supposed to be passed a string that is known
4711 to be a valid IP address. However, in the case of IPv6 addresses, it was
4712 not checking this. This is a hostage to fortune. Exim now panics and dies
4713 if the condition is not met. A case was found where this could be provoked
4714 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4715 components; fortuitously, this particular loophole had already been fixed
4716 by change 4.50/55 or 4.44/33 above.
4718 If there are any other similar loopholes, the new check in host_aton()
4719 itself should stop them being exploited. The report I received stated that
4720 data on the command line could provoke the exploit when Exim was running as
4721 exim, but did not say which command line option was involved. All I could
4722 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4723 running as the user.
4726 35. There was a buffer overflow vulnerability in the SPA authentication code
4727 (which came originally from the Samba project). I have added a test to the
4728 spa_base64_to_bits() function which I hope fixes it.
4731 36. The daemon start-up calls getloadavg() while still root for those OS that
4732 need the first call to be done as root, but it missed one case: when
4733 deliver_queue_load_max is set with deliver_drop_privilege. This is
4734 necessary for the benefit of the queue runner, because there is no re-exec
4735 when deliver_drop_privilege is set.
4737 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4738 was in use, was not putting the data itself into the right store pool;
4739 consequently, it could be overwritten for a subsequent message in the same
4740 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4743 38. Sometimes the final signoff response after QUIT could fail to get
4744 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4745 < 0 before doing a fflush(). This bug looks as though it goes back to the
4746 introduction of TLS in release 3.20, but "sometimes" must have been rare
4747 because the tests only now provoked it.
4753 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4754 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4755 Now it returns an integer. A number of calls were still expecting a T/F
4756 return. Fortuitously, in all cases, the tests worked in OK situations,
4757 which is the norm. However, things would have gone wrong on any write
4758 failures on the smtp file descriptor. This function is used when sending
4759 messages over SMTP and also when doing verify callouts.
4761 2. When Exim is called to do synchronous delivery of a locally submitted
4762 message (the -odf or -odi options), it no longer closes stderr before doing
4765 3. Implemented the mua_wrapper option.
4767 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4769 5. Implemented the functions header_remove(), header_testname(),
4770 header_add_at_position(), and receive_remove_recipient(), and exported them
4773 6. If an ACL "warn" statement specified the addition of headers, Exim already
4774 inserted X-ACL-Warn: at the start if there was no header name. However, it
4775 was not making this test for the second and subsequent header lines if
4776 there were newlines in the string. This meant that an invalid header could
4777 be inserted if Exim was badly configured.
4779 7. Allow an ACL "warn" statement to add header lines at the start or after all
4780 the Received: headers, as well as at the end.
4782 8. Added the rcpt_4xx retry error code.
4784 9. Added postmaster_mailfrom=xxx to callout verification option.
4786 10. Added mailfrom=xxxx to the callout verification option, for verify=
4789 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4790 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4792 12. Inserted some casts to stop certain compilers warning when using pointer
4793 differences as field lengths or precisions in printf-type calls (mostly
4794 affecting debugging statements).
4796 13. Added optional readline() support for -be (dynamically loaded).
4798 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4799 same clock tick as a message's arrival, so that its received time was the
4800 same as the "first fail" time on the retry record, and that message
4801 remained on the queue past the ultimate address timeout, every queue runner
4802 would try a delivery (because it was past the ultimate address timeout) but
4803 after another failure, the ultimate address timeout, which should have then
4804 bounced the address, did not kick in. This was a "< instead of <=" error;
4805 in most cases the first failure would have been in the next clock tick
4806 after the received time, and all would be well.
4808 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4809 being recognized when the domain list was tested by the match_domain
4810 condition in an expansion string.
4812 16. Added the ${str2b64: operator.
4814 17. Exim was always calling setrlimit() to set a large limit for the number of
4815 processes, without checking whether the existing limit was already
4816 adequate. (It did check for the limit on file descriptors.) Furthermore,
4817 errors from getrlimit() and setrlimit() were being ignored. Now they are
4818 logged to the main and panic logs, but Exim does carry on, to try to do its
4819 job under whatever limits there are.
4821 18. Imported PCRE 5.0.
4823 19. Trivial typo in log message " temporarily refused connection" (the leading
4826 20. If the log selector return_path_on_delivery was set and an address was
4827 redirected to /dev/null, the delivery process crashed because it assumed
4828 that a return path would always be set for a "successful" delivery. In this
4829 case, the whole delivery is bypassed as an optimization, and therefore no
4832 21. Internal re-arrangement: the function for sending a challenge and reading
4833 a response while authentication was assuming a zero-terminated challenge
4834 string. It's now changed to take a pointer and a length, to allow for
4835 binary data in such strings.
4837 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4839 23. Exim was not respecting finduser_retries when seeking the login of the
4840 uid under which it was called; it was always trying 10 times. (The default
4841 setting of finduser_retries is zero.) Also, it was sleeping after the final
4842 failure, which is pointless.
4844 24. Implemented tls_on_connect_ports.
4846 25. Implemented acl_smtp_predata.
4848 26. If the domain in control=submission is set empty, Exim assumes that the
4849 authenticated id is a complete email address when it generates From: or
4850 Sender: header lines.
4852 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4853 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4854 chown and chgrp in /bin and hostname in /usr/bin.
4856 28. Exim was keeping the "process log" file open after each use, just as it
4857 does for the main log. This opens the possibility of it remaining open for
4858 long periods when the USR1 signal hits a daemon. Occasional processlog
4859 errors were reported, that could have been caused by this. Anyway, it seems
4860 much more sensible not to leave this file open at all, so that is what now
4863 29. The long-running daemon process does not normally write to the log once it
4864 has entered its main loop, and it closes the log before doing so. This is
4865 so that log files can straightforwardly be renamed and moved. However,
4866 there are a couple of unusual error situations where the daemon does write
4867 log entries, and I had neglected to close the log afterwards.
4869 30. The text of an SMTP error response that was received during a remote
4870 delivery was being truncated at 512 bytes. This is too short for some of
4871 the long messages that one sometimes sees. I've increased the limit to
4874 31. It is now possible to make retry rules that apply only when a message has a
4875 specific sender, in particular, an empty sender.
4877 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4878 it possible to be selective about when SMTP synchronization is enforced.
4880 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4882 32. Implemented hosts_connection_nolog.
4884 33. Added an ACL for QUIT.
4886 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4889 35. Added mailbox_size and mailbox_filecount to appendfile.
4891 36. Added control = no_multiline_responses to ACLs.
4893 37. There was a bug in the logic of the code that waits for the clock to tick
4894 in the case where the clock went backwards by a substantial amount such
4895 that the microsecond fraction of "now" was more than the microsecond
4896 fraction of "then" (but the whole seconds number was less).
4898 38. Added support for the libradius Radius client library this is found on
4899 FreeBSD (previously only the radiusclient library was supported).
4905 1. When certain lookups returned multiple values in the form name=value, the
4906 quoting of the values was not always being done properly. Specifically:
4907 (a) If the value started with a double quote, but contained no whitespace,
4909 (b) If the value contained whitespace other than a space character (i.e.
4910 tabs or newlines or carriage returns) it was not quoted.
4911 This fix has been applied to the mysql and pgsql lookups by writing a
4912 separate quoting function and calling it from the lookup code. The fix
4913 should probably also be applied to nisplus, ibase and oracle lookups, but
4914 since I cannot test any of those, I have not disturbed their existing code.
4916 2. A hit in the callout cache for a specific address caused a log line with no
4917 reason for rejecting RCPT. Now it says "Previous (cached) callout
4918 verification failure".
4920 3. There was an off-by-one bug in the queryprogram router. An over-long
4921 return line was truncated at 256 instead of 255 characters, thereby
4922 overflowing its buffer with the terminating zero. As well as fixing this, I
4923 have increased the buffer size to 1024 (and made a note to document this).
4925 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4926 when Exim is waiting for an SMTP response from a remote server, Exim
4927 restarts its select() call on the socket, thereby resetting its timeout.
4928 This is not a problem when such interrupts are rare. Somebody set up a cron
4929 job to run exiwhat every 2 minutes, which is less than the normal select()
4930 timeout (5 or 10 minutes). This meant that the select() timeout never
4931 kicked in because it was always reset. I have fixed this by comparing the
4932 time when an interrupt arrives with the time at the start of the first call
4933 to select(). If more time than the timeout has elapsed, the interrupt is
4934 treated as a timeout.
4936 5. Some internal re-factoring in preparation for the addition of Sieve
4937 extensions (by MH). In particular, the "personal" test is moved to a
4938 separate function, and given an option for scanning Cc: and Bcc: (which is
4939 not set for Exim filters).
4941 6. When Exim created an email address using the login of the caller as the
4942 local part (e.g. when creating a From: or Sender: header line), it was not
4943 quoting the local part when it contained special characters such as @.
4945 7. Installed new OpenBSD configuration files.
4947 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4948 try to make them clearer.
4950 9. Callout options, other than the timeout value, were being ignored when
4951 verifying sender addresses in header lines. For example, when using
4953 verify = header_sender/callout=no_cache
4955 the cache was (incorrectly) being used.
4957 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4958 only the Cygwin environment.
4960 11. When return_path_on_delivery was set as a log selector, if different remote
4961 addresses in the same message used different return paths and parallel
4962 remote delivery occurred, the wrong values would sometimes be logged.
4963 (Whenever a remote delivery process finished, the return path value from
4964 the most recently started remote delivery process was logged.)
4966 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4967 lines when AUTH and/or TLS are in use. This is the "received protocol"
4968 field. Exim used to use "asmtp" for authenticated SMTP, without any
4969 indication (in the protocol name) for TLS use. Now it follows the RFC and
4970 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4971 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4972 names appear in log lines as well as in Received: header lines.
4974 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4975 extensions, and comparison tests, and to fix some bugs.
4977 14. Changes to the "personal" filter test:
4979 (1) The test was buggy in that it was just doing the equivalent of
4980 "contains" tests on header lines. For example, if a user's address was
4981 anne@some.where, the "personal" test would incorrectly be true for
4983 To: susanne@some.where
4985 This test is now done by extracting each address from the header in turn,
4986 and checking the entire address. Other tests that are part of "personal"
4987 are now done using regular expressions (for example, to check local parts
4988 of addresses in From: header lines).
4990 (2) The list of non-personal local parts in From: addresses has been
4991 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4992 taken from the Sieve specification recommendations.
4994 (3) If the message contains any header line starting with "List-" it is
4995 treated as non-personal.
4997 (4) The test for "circular" in the Subject: header line has been removed
4998 because it now seems ill-conceived.
5000 15. Minor typos in src/EDITME comments corrected.
5002 16. Installed latest exipick from John Jetmore.
5004 17. If headers_add on a router specified a text string that was too long for
5005 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5006 of string_sprintf() is now avoided.
5008 18. $message_body_size was not set (it was always zero) when running the DATA
5009 ACL and the local_scan() function.
5011 19. For the "mail" command in an Exim filter, no default was being set for
5012 the once_repeat time, causing a random time value to be used if "once" was
5013 specified. (If the value happened to be <= 0, no repeat happened.) The
5014 default is now 0s, meaning "never repeat". The "vacation" command was OK
5015 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5016 (I found it when inspecting the code).
5018 20. There is now an overall timeout for performing a callout verification. It
5019 defaults to 4 times the callout timeout, which applies to individual SMTP
5020 commands during the callout. The overall timeout applies when there is more
5021 than one host that can be tried. The timeout is checked before trying the
5022 next host. This prevents very long delays if there are a large number of
5023 hosts and all are timing out (e.g. when the network connections are timing
5024 out). The value of the overall timeout can be changed by specifying an
5025 additional sub-option for "callout", called "maxwait". For example:
5027 verify = sender/callout=5s,maxwait=20s
5029 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5030 to the end before writing, but this should make it even safer).
5032 22. Exim was forgetting that it had advertised PIPELINING for the second and
5033 subsequent messages on an SMTP connection. It was also not resetting its
5034 memory on STARTTLS and an internal HELO.
5036 23. When Exim logs an SMTP synchronization error within a session, it now
5037 records whether PIPELINING has been advertised or not.
5039 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5040 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5041 rather than long int.
5043 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5045 26. Added the never_mail option to autoreply.
5051 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5052 crash if the getsockname() call failed; this can happen if a connection is
5053 closed very soon after it is established. The problem was simply in the
5054 order in which certain operations were done, causing Exim to try to write
5055 to the SMTP stream before it had set up the file descriptor. The bug has
5056 been fixed by making things happen in the correct order.
5062 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5063 before the connection was closed, thus losing the rejection response.
5065 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5066 some early Solaris releases, but causes trouble in current releases where
5067 socklen_t is defined.
5069 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5072 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5075 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5076 that releasing the top of it at the end releases what was used for sub-
5077 expansions (unless the block got too big). However, discard this block if
5078 the first thing is a variable or header, so that we can use its block when
5079 it is dynamic (useful for very large $message_headers, for example).
5081 6. Lookups now cache *every* query, not just the most recent. A new, separate
5082 store pool is used for this. It can be recovered when all lookup caches are
5083 flushed. Lookups now release memory at the end of their result strings.
5084 This has involved some general refactoring of the lookup sources.
5086 7. Some code has been added to the store_xxx() functions to reduce the amount
5087 of flapping under certain conditions.
5089 8. log_incoming_interface used to affect only the <= reception log lines. Now
5090 it causes the local interface and port to be added to several more SMTP log
5091 lines, for example "SMTP connection from", and rejection lines.
5093 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5095 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5097 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5098 could be overwritten at the end of the current message (or the start of a
5099 new message if it was set in a HELO ACL). The value is now preserved for
5100 the duration of the SMTP connection.
5102 12. If a transport had a headers_rewrite setting, and a matching header line
5103 contained an unqualified address, that address was qualified, even if it
5104 did not match any rewriting rules. The underlying bug was that the values
5105 of the flags that permit the existence of unqualified sender and recipient
5106 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5107 non-local messages, and by -bnq for local messages) were not being
5108 preserved with the message after it was received.
5110 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5111 "next input=" as part of the text comprising the host identity instead of
5112 the correct text. The code was using the same buffer for two different
5113 strings. However, depending on which order the printing function evaluated
5114 its arguments, the bug did not always show up. Under Linux, for example, my
5115 test suite worked just fine.
5117 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5118 doesn't work with some older versions of Perl. It has been changed to "my",
5119 which in any case is probably the better facility to use.
5121 15. A really picky compiler found some instances of statements for creating
5122 error messages that either had too many or two few arguments for the format
5125 16. The size of the buffer for calls to the DNS resolver has been increased
5126 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5127 for addresses that have a lot of PTR records. This alleviates a problem; it
5128 does not fully solve it.
5130 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5131 buffer now truncates the list and logs the incident, which is the same
5132 action as happens when Exim is looking up a host name and its aliases.
5133 Previously in this situation something unpredictable would happen;
5134 sometimes it was "internal error: store_reset failed".
5136 18. If a server dropped the connection unexpectedly when an Exim client was
5137 using GnuTLS and trying to read a response, the client delivery process
5138 crashed while trying to generate an error log message.
5140 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5141 string, for example:
5143 warn message = H1: something\nH2: something
5145 the text was added as a single header line from Exim's point of view
5146 though it ended up OK in the delivered message. However, searching for the
5147 second and subsequent header lines using $h_h2: did not work. This has been
5148 fixed. Similarly, if a system filter added multiple headers in this way,
5149 the routers could not see them.
5151 20. Expanded the error message when iplsearch is called with an invalid key to
5152 suggest using net-iplsearch in a host list.
5154 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5155 ACLs are no longer actually imposed (and a message to that effect is
5158 22. If a "gecos" field in a passwd entry contained escaped characters, in
5159 particular, if it contained a \" sequence, Exim got it wrong when building
5160 a From: or a Sender: header from that name. A second bug also caused
5161 incorrect handling when an unquoted " was present following a character
5162 that needed quoting.
5164 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5165 was not being matched caselessly.
5167 24. Arranged for all hyphens in the exim.8 source to be escaped with
5170 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5171 properly. Recipient callout cache records were still being keyed to include
5172 the sender, even when use_sender was set false. This led to far more
5173 callouts that were necessary. The sender is no longer included in the key
5174 when use_sender is false.
5176 26. Added "control = submission" modifier to ACLs.
5178 27. Added the ${base62d: operator to decode base 62 numbers.
5180 28. dnsdb lookups can now access SRV records.
5182 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5183 the configuration file.
5185 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5186 (-v) mode. This makes the output for a verbose queue run more intelligible.
5188 31. Added a use_postmaster feature to recipient callouts.
5190 32. Added the $body_zerocount variable, containing the number of binary zero
5191 bytes in the message body.
5193 33. The time of last modification of the "new" subdirectory is now used as the
5194 "mailbox time last read" when there is a quota error for a maildir
5197 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5199 35. Added +ignore_unknown as a special item in host lists.
5201 36. Code for decoding IPv6 addresses in host lists is now included, even if
5202 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5203 address was recognized as an IP address, but was then not correctly decoded
5204 into binary, causing unexpected and incorrect effects when compared with
5211 1. Very minor rewording of debugging text in manualroute to say "list of
5212 hosts" instead of "hostlist".
5214 2. If verify=header_syntax was set, and a header line with an unqualified
5215 address (no domain) and a large number of spaces between the end of the
5216 name and the colon was received, the reception process suffered a buffer
5217 overflow, and (when I tested it) crashed. This was caused by some obsolete
5218 code that should have been removed. The fix is to remove it!
5220 3. When running in the test harness, delay a bit after writing a bounce
5221 message to get a bit more predictability in the log output.
5223 4. Added a call to search_tidyup() just before forking a reception process. In
5224 theory, someone could use a lookup in the expansion of smtp_accept_max_
5225 per_host which, without the tidyup, could leave open a database connection.
5227 5. Added the variables $recipient_data and $sender_data which get set from a
5228 lookup success in an ACL "recipients" or "senders" condition, or a router
5229 "senders" option, similar to $domain_data and $local_part_data.
5231 6. Moved the writing of debug_print from before to after the "senders" test
5234 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5235 problems for message scanning, either using a data ACL, or using
5236 local_scan() because the Received: header was not generated till after they
5237 were called (in order to set the time as the time of reception completion).
5238 I have revised the way this works. The header is now generated after the
5239 body is received, but before the ACL or local_scan() are called. After they
5240 are run, the timestamp in the header is updated.
5246 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5247 before starting a queue runner without re-exec. This happened only when
5248 deliver_drop_privilege was set or when the Exim user was set to root. The
5249 effect of the bug was that timeouts during subsequent deliveries caused
5250 crashes instead of being properly handled. The handler is now left at its
5251 default (and expected) setting.
5253 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5254 message, again when deliver_drop_privilege is set or Exim is run as root.
5255 The bug described in (1) was not present in this case, but the tidying up
5256 of the other signals was missing. I have made the two cases consistent.
5258 3. The ignore_target_hosts setting on a manualroute router was being ignored
5259 for hosts that were looked up using the /MX notation.
5261 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5264 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5265 operated on the sender address. After changing the $sender_address to <>
5266 for the sender address verify, Exim was re-instated it as the original
5267 (before rewriting) address, but remembering that it had rewritten it, so it
5268 wasn't rewriting it again. This bug also had the effect of breaking the
5269 sender address verification caching when the sender address was rewritten.
5271 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5272 This has been changed so that if the ip literal address matches
5273 ignore_target_hosts, the router declines.
5275 7. Added expansion conditions match_domain, match_address, and match_local_
5276 part (NOT match_host).
5278 8. The placeholder for the Received: header didn't have a length field set.
5280 9. Added code to Exim itself and to exim_lock to test for a specific race
5281 condition that could lead to file corruption when using MBX delivery. The
5282 issue is with the lockfile that is created in /tmp. If this file is removed
5283 after a process has opened it but before that process has acquired a lock,
5284 there is the potential for a second process to recreate the file and also
5285 acquire a lock. This could lead to two Exim processes writing to the file
5286 at the same time. The added code performs the same test as UW imapd; it
5287 checks after acquiring the lock that its file descriptor still refers to
5288 the same named file.
5290 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5291 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5294 11. Added the smtp_active_hostname option. If used, this will typically be made
5295 to depend on the incoming interface address. Because $interface_address is
5296 not set up until the daemon has forked a reception process, error responses
5297 that can happen earlier (such as "too many connections") no longer contain
5300 12. If an expansion in a condition on a "warn" statement fails because a lookup
5301 defers, the "warn" statement is abandoned, and the next ACL statement is
5302 processed. Previously this caused the whole ACL to be aborted.
5304 13. Added the iplsearch lookup type.
5306 14. Added ident_timeout as a log selector.
5308 15. Added tls_certificate_verified as a log selector.
5310 16. Added a global option tls_require_ciphers (compare the smtp transport
5311 option of the same name). This controls incoming TLS connections.
5313 17. I finally figured out how to make tls_require_ciphers do a similar thing
5314 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5315 before starting the TLS session.
5317 18. Tabs are now shown as \t in -bP output.
5319 19. If the log selector return_path_on_delivery was set, Exim crashed when
5320 bouncing a message because it had too many Received: header lines.
5322 20. If two routers both had headers_remove settings, and the first one included
5323 a superfluous trailing colon, the final name in the first list and the
5324 first name in the second list were incorrectly joined into one item (with a
5325 colon in the middle).
5331 1. Added -C and -D options to the exinext utility, mainly to make it easier
5332 to include in the automated testing, but these could be helpful when
5333 multiple configurations are in use.
5335 2. The exinext utility was not formatting the output nicely when there was
5336 an alternate port involved in the retry record key, nor when there was a
5337 message id as well (for retries that were specific to a specific message
5338 and a specific host). It was also confused by IPv6 addresses, because of
5339 the additional colons they contain. I have fixed the IPv4 problem, and
5340 patched it up to do a reasonable job for IPv6.
5342 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5343 delivery, the log line now contains "pipelined" if PIPELINING was used.
5345 4. An SMTP transport process used to panic and die if the bind() call to set
5346 an explicit outgoing interface failed. This has been changed; it is now
5347 treated in the same way as a connect() failure.
5349 5. A reference to $sender_host_name in the part of a conditional expansion
5350 that was being skipped was still causing a DNS lookup. This no longer
5353 6. The def: expansion condition was not recognizing references to header lines
5354 that used bh_ and bheader_.
5356 7. Added the _cache feature to named lists.
5358 8. The code for checking quota_filecount in the appendfile transport was
5359 allowing one more file than it should have been.
5361 9. For compatibility with Sendmail, the command line option
5369 and sets the incoming protocol and host name (for trusted callers). The
5370 host name and its colon can be omitted when only the protocol is to be set.
5371 Note the Exim already has two private options, -pd and -ps, that refer to
5372 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5373 "s", but I don't think that's a major issue.
5375 10. A number of refactoring changes to the code, none of which should affect
5378 (a) The number of logging options was getting close to filling up the
5379 32-bit word that was used as a bit map. I have split them into two classes:
5380 those that are passed in the argument to log_write(), and those that are
5381 only ever tested independently outside of that function. These are now in
5382 separate 32-bit words, so there is plenty of room for expansion again.
5383 There is no change in the user interface or the logging behaviour.
5385 (b) When building, for example, log lines, the code previously used a
5386 macro that called string_cat() twice, in order to add two strings. This is
5387 not really sufficiently general. Furthermore, there was one instance where
5388 it was actually wrong because one of the argument was used twice, and in
5389 one call a function was used. (As it happened, calling the function twice
5390 did not affect the overall behaviour.) The macro has been replaced by a
5391 function that can join an arbitrary number of extra strings onto a growing
5394 (c) The code for expansion conditions now uses a table and a binary chop
5395 instead of a serial search (which was left over from when there were very
5396 few conditions). Also, it now recognizes conditions like "pam" even when
5397 the relevant support is not compiled in: a suitably worded error message is
5398 given if an attempt is made to use such a condition.
5400 11. Added ${time_interval:xxxxx}.
5402 12. A bug was causing one of the ddress fields not to be passed back correctly
5403 from remote delivery subprocesses. The field in question was not being
5404 subsequently used, so this caused to problems in practice.
5406 13. Added new log selectors queue_time and deliver_time.
5408 14. Might have fixed a bug in maildirsizefile handling that threw up
5409 "unexpected character" debug warnings, and recalculated the data
5410 unnecessarily. In any case, I expanded the warning message to give more
5413 15. Added the message "Restricted characters in address" to the statements in
5414 the default ACL that block characters like @ and % in local parts.
5416 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5417 Three changes have been made:
5419 (a) There was a serious bug; a negative response to MAIL caused the whole
5420 recipient domain to be cached as invalid, thereby blocking all messages
5421 to all local parts at the same domain, from all senders. This bug has
5422 been fixed. The domain is no longer cached after a negative response to
5423 MAIL if the sender used is not empty.
5425 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5428 (c) A new callout option, "use_sender" has been added for people who want
5429 the modified behaviour.
5435 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5438 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5439 indeed breaks things for older releases.
5441 3. Added additional logging to the case where there is a problem reading data
5442 from a filter that is running in a subprocess using a pipe, in order to
5443 try to track down a specific problem.
5445 4. Testing facility fudge: when running in the test harness and attempting
5446 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5447 getting "No route to host". Convert this to a timeout.
5449 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5452 6. Some OS don't have socklen_t but use size_t instead. This affects the
5453 fifth argument of getsockopt() amongst other things. This is now
5454 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5455 can be set for individual OS. I have set it for SunOS5, OSF1, and
5456 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5457 some earlier ones do not.
5459 7. Change 4.30/15 was not doing the test caselessly.
5461 8. The standard form for an IPv6 address literal was being rejected by address
5462 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5463 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5464 this, as well as the form without the "IPv6" on the front (but only when
5465 address literals are enabled, of course).
5467 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5469 10. Exim crashed if a message with an empty sender address specified by -f
5470 encountered a router with an errors_to setting. This could be provoked only
5471 by a command such as
5475 where an empty string was supplied; "<>" did not hit this bug.
5477 11. Installed PCRE release 4.5.
5479 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5480 remained set. It is now erased.
5482 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5483 times from message ids (which are base 36 rather than the normal 62).
5485 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5486 were being counted as actual protocol errors, and logged if the log
5487 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5488 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5489 and DATA following a set of rejected RCPTs do not count as protocol errors.
5490 In other words, Exim assumes they were pipelined, though this may not
5491 actually be the case. Of course, in all cases the client gets an
5492 appropriate error code.
5494 15. If a lookup fails in an ACL condition, a message about the failure may
5495 be available; it is used if testing the ACL cannot continue, because most
5496 such messages specify what the cause of the deferral is. However, some
5497 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5498 that caused an old message to be retained and used if a later statement
5499 caused a defer, replacing the real cause of the deferral.
5501 16. If an IP address had so many PTR records that the DNS lookup buffer
5502 was not large enough to hold them, Exim could crash while trying to process
5503 the truncated data. It now detects and logs this case.
5505 17. Further to 4.21/58, another change has been made: if (and only if) the
5506 first line of a message (the first header line) ends with CRLF, a bare LF
5507 in a subsequent header line has a space inserted after it, so as not to
5508 terminate the header.
5510 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5511 unnecessarily, used atoi() instead of strtol(), and didn't check the
5512 termination when getting file sizes from file names by regex.
5514 19. Completely re-implemented the support for maildirsize files, in the light
5515 of a number of problems with the previous contributed implementation
5516 (4.30/29). In particular:
5518 . If the quota is zero, the maildirsize file is maintained, but no quota is
5521 . If the maildir directory does not exist, it is created before any attempt
5522 to write a maildirsize file.
5524 . The quota value in the file is just a cache; if the quota is changed in
5525 the transport, the new value overrides.
5527 . A regular expression is available for excluding directories from the
5530 20. The autoreply transport checks the characters in options that define the
5531 message's headers; it allows continued headers, but it was checking with
5532 isspace() after an embedded newline instead of explicitly looking for a
5535 21. If all the "regular" hosts to which an address was routed had passed their
5536 expiry times, and had not reached their retry times, the address was
5537 bounced, even if fallback hosts were defined. Now Exim should go on to try
5540 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5541 equivalent code in the SMTP transport. Some hosts send humungous responses
5542 to HELO/EHLO, more than 1024 it seems.
5544 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5545 gives compiler warnings in some environments. I've now done it "properly",
5548 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5549 (because of problems with the built-in one) was declared to return uschar *
5550 instead of char *, causing compiler failure.
5552 25. Fixed a file descriptor leak when processing alias/forward files.
5554 26. Fixed a minor format string issue in dbfn.c.
5556 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5558 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5559 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5562 29. When a sender address is verified, it is cached, to save repeating the test
5563 when there is more than one recipient in a message. However, when the
5564 verification involves a callout, it is possible for different callout
5565 options to be set for different recipients. It is too complicated to keep
5566 track of this in the cache, so now Exim always runs a verification when a
5567 callout is required, relying on the callout cache for the optimization.
5568 The overhead is duplication of the address routing, but this should not be
5571 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5572 to be verified with callout=postmaster, and the main callout worked but the
5573 postmaster check failed, the verification correctly failed. However, if a
5574 subsequent RCPT command asked for sender verification *without* the
5575 postmaster check, incorrect caching caused this verification also to fail,
5578 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5579 it was not caching the DNS options (qualify_single, search_parents) that
5580 were used when the lookup failed. A subsequent lookup with different
5581 options therefore always gave the same answer, though there were cases
5582 where it should not have. (Example: a "domains = !$mx_any" option on a
5583 dnslookup router: the "domains" option is always processed without any
5584 widening, but the router might have qualify_single set.) Now Exim uses the
5585 cached value only when the same options are set.
5587 32. Added John Jetmore's "exipick" utility to the distribution.
5589 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5590 than a timeout (e.g. a certificate is required, and is not provided), an
5591 Exim server now closes the connection immediately. Previously it waited for
5592 the client to close - but if the client is SSL, it seems that they each
5593 wait for each other, leading to a delay before one of them times out.
5595 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5596 maintained 0.8.x compatibility because I don't think many are using it, and
5597 it is clearly obsolete.
5599 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5602 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5603 client certificate was expired. A simple patch fixes this, though I don't
5604 understand the full logic of why the verify callback is called multiple
5607 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5608 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5609 which causes problems with some clients (such as the Certicom SSL Plus
5610 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5611 disables the coutermeasure allowing Eudora to connect."
5613 38. Exim was not checking that a write() to a log file succeeded. This could
5614 lead to Bad Things if a log got too big, in particular if it hit a file
5615 size limit. Exim now panics and dies if it cannot write to a log file, just
5616 as it does if it cannot open a log file.
5618 39. Modified OS/Makefile-Linux so that it now contains
5620 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5622 The two -D definitions ensure that Exim is compiled with large file
5623 support, which makes it possible to handle log files that are bigger than
5626 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5627 instance) a domain was checked against a named list that involved a lookup,
5628 causing $domain_data to be set, then another domain was checked against the
5629 same list, then the first domain was re-checked, the value of $domain_data
5630 after the final check could be wrong. In particular, if the second check
5631 failed, it could be set empty. This bug probably also applied to
5634 41. The strip_trailing_dot option was not being applied to the address given
5635 with the -f command-line option.
5637 42. The code for reading a message's header from the spool was incrementing
5638 $received_count, but never initializing it. This meant that the value was
5639 incorrect (doubled) while delivering a message in the same process in which
5640 it was received. In the most common configuration of Exim, this never
5641 happens - a fresh exec is done - but it can happen when
5642 deliver_drop_privilege is set.
5644 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5645 it now includes up to 150 characters of the unexpected data in the log
5648 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5649 and building data strings. The size of both of these buffers was 10 000
5650 bytes - far larger than anybody would *ever* want, thought I. Needless to
5651 say, somebody hit the limit. I have increased the maximum line length to
5652 20 000 and the maximum data length of concatenated lines to 100 000. I have
5653 also fixed two bugs, because there was no checking on these buffers. Tsk,
5654 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5655 buffer is too small.
5657 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5658 lsearch lookups. Now it does.
5660 46. When parsing a route_list item in a manualroute router, a fixed-length
5661 buffer was used for the list of hosts. I made this 1024 bytes long,
5662 thinking that nobody would ever have a list of hosts that long. Wrong.
5663 Somebody had a whole pile of complicated expansion conditions, and the
5664 string was silently truncated, leading to an expansion error. It turns out
5665 that it is easier to change to an unlimited length (owing to other changes
5666 that have happened since this code was originally written) than to build
5667 structure for giving a limitation error. The length of the item that
5668 expands into the list of hosts is now unlimited.
5670 47. The lsearch lookup could not handle data where the length of text line was
5671 more than 4095 characters. Such lines were truncated, leading to shortened
5672 data being returned. It should now handle lines of any length.
5674 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5675 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5678 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5679 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5680 no longer happens in comment lines. A list of replacements is now placed
5681 at the head of all of the source files, except those whose only change is
5682 to replace PERL_COMMAND in the very first #! line.
5684 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5685 messages on the queue, with a bottom-up merge sort, using code contributed
5686 by Michael Haardt. This should make operations like -bp somewhat faster on
5687 large queues. It won't affect queue runners, except when queue_run_in_order
5690 51. Installed eximstats 1.31 in the distribution.
5692 52. Added support for SRV lookups to the dnslookup router.
5694 53. If an ACL referred to $message_body or $message_body_end, the value was not
5695 reset for any messages that followed in the same SMTP session.
5697 54. The store-handling optimization for building very long strings was not
5698 differentiating between the different store pools. I don't think this
5699 actually made any difference in practice, but I've tidied it.
5701 55. While running the routers to verify a sender address, $sender_address
5702 was still set to the sender address. This is wrong, because when routing to
5703 send a bounce to the sender, it would be empty. Therefore, I have changed
5704 it so that, while verifying a sender address, $sender_address is set to <>.
5705 (There is no change to what happens when verifying a recipient address.)
5707 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5708 target A or AAAA records (if not already returned) without resetting the
5709 qualify_single or search_parents options of the DNS resolver. These are
5710 inappropriate in this case because the targets of MX and SRV records must
5711 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5712 target that, when qualified, matched something in the local domain. These
5713 two options are now turned off when doing these lookups.
5715 57. It seems that at least some releases of Reiserfs (which does not have the
5716 concept of a fixed number of inodes) returns zero and not -1 for the
5717 number of available inodes. This interacted badly with check_spool_inodes,
5718 which assumed that -1 was the "no such thing" setting. What I have done is
5719 to check that the total number of inodes is greater than zero before doing
5720 the test of how many are available.
5722 58. When a "warn" ACL statement has a log_message modifier, the message is
5723 remembered, and not repeated. This is to avoid a lot of repetition when a
5724 message has many recipients that cause the same warning to be written.
5725 However, Exim was preserving the list of already written lines for an
5726 entire SMTP session, which doesn't seem right. The memory is now reset if a
5727 new message is started.
5729 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5730 debugging output unless log_rewrite was also set.
5732 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5733 of (int)(handle) when we know that handle contains (void *)(-1).
5735 61. The Exim daemon panic-logs an error return when it closes the incoming
5736 connection. However "connection reset by peer" seems to be common, and
5737 isn't really an error worthy of noting specially, so that particular error
5740 62. When Exim is trying to find all the local interfaces, it used to panic and
5741 die if the ioctl to get the interface flags failed. However, it seems that
5742 on at least one OS (Solaris 9) it is possible to have an interface that is
5743 included in the list of interfaces, but for which you get a failure error
5744 for this call. This happens when the interface is not "plumbed" into a
5745 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5746 failure of the "get flags" call assumes that the interface is down.
5748 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5749 makes life easier for people who are doing arithmetic on fields extracted
5750 from dates, where you often get leading zeros that should not be
5751 interpreted as octal.
5753 64. Added qualify_domain to the redirect router, to override the global
5756 65. If a pathologically long header line contained very many addresses (the
5757 report of this problem mentioned 10 000) and each of them was rewritten,
5758 Exim could use up a very large amount of memory. (It kept on making new
5759 copies of the header line as it rewrote, and never released the old ones.)
5760 At the expense of a bit more processing, the header rewriting function has
5761 been changed so that it no longer eats memory in this way.
5763 66. The generation of the Received: header has been moved from the time that a
5764 message starts to be received, to the time that it finishes. The timestamp
5765 in the Received: header should now be very close to that of the <= log
5766 line. There are two side-effects of this change:
5768 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5769 logged header lines no longer include the local Received: line, because
5770 it has not yet been created. The same applies to a copy of the message
5771 that is returned to a non-SMTP sender when a message is rejected.
5773 (b) When a filter file is tested using -bf, no additional Received: header
5774 is added to the test message. After some thought, I decided that this
5777 This change does not affect the value of $received_for. It is still set
5778 after address rewriting, but before local_scan() is called.
5780 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5782 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5783 gave an unhelpful panic error message, and a defer error. I have managed to
5784 change this behaviour so that it now rejects any supplied certificate,
5785 which seems right, as the list of acceptable certificates is empty.
5787 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5788 gave an unhelpful defer error. I have not managed to make this reject any
5789 supplied certificates, but the error message it gives is "no certificate
5790 supplied", which is not helpful.
5792 70. exigrep's output now also includes lines that are not associated with any
5793 message, but which match the given pattern. Implemented by a patch from
5794 Martin Sluka, which also tidied up the Perl a bit.
5796 71. Recipient callout verification, like sender verification, was using <> in
5797 the MAIL FROM command. This isn't really the right thing, since the actual
5798 sender may affect whether the remote host accepts the recipient or not. I
5799 have changed it to use the actual sender in the callout; this means that
5800 the cache record is now keyed on a recipient/sender pair, not just the
5801 recipient address. There doesn't seem to be a real danger of callout loops,
5802 since a callout by the remote host to check the sender would use <>.
5803 [SEE ABOVE: changed after hitting problems.]
5805 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5806 temporary errors. However, in the case of such a code being given after
5807 the end of a data transmission (i.e. after ".") Exim was failing to write
5808 a retry record for the message. (Yes, there was some broken host that was
5809 actually sending 8xx at this point.)
5811 73. An unknown lookup type in a host list could cause Exim to panic-die when
5812 the list was checked. (An example that provoked this was putting <; in the
5813 middle of a list instead of at the start.) If this happened during a DATA
5814 ACL check, a -D file could be left lying around. This kind of configuration
5815 error no longer causes Exim to die; instead it causes a defer error. The
5816 incident is still logged to the main and panic logs.
5818 74. Buglet left over from Exim 3 conversion. The message "too many messages
5819 in one connection" was written to the rejectlog but not the mainlog, except
5820 when address rewriting (yes!) was being logged.
5822 75. Added write_rejectlog option.
5824 76. When a system filter was run not as root (that is, when system_filter_user
5825 was set), the values of the $n variables were not being returned to the
5826 main process; thus, they were not subsequently available in the $sn
5829 77. Added +return_path_on_delivery log selector.
5831 78. A connection timeout was being treated differently from recipients deferred
5832 when testing hosts_max_try with a message that was older than the host's
5833 retry timeout. (The host should not be counted, thus allowing all hosts to
5834 be tried at least once before bouncing.) This may have been the cause of an
5835 occasionally reported bug whereby a message would remain on the queue
5836 longer than the retry timeout, but would be bounced if a delivery was
5837 forced. I say "may" because I never totally pinned down the problem;
5838 setting up timeout/retry tests is difficult. See also the next item.
5840 79. The ultimate address timeout was not being applied to errors that involved
5841 a combination of host plus message (for example, a timeout on a MAIL
5842 command). When an address resolved to a number of possible hosts, and they
5843 were not all tried for each delivery (e.g. because of hosts_max_try), a
5844 message could remain on the queue longer than the retry timeout.
5846 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5849 81. Fixed an obscure SMTP outgoing bug which required at least the following
5850 conditions: (a) there was another message waiting for the same server;
5851 (b) the server returned 5xx to all RCPT commands in the first message so
5852 that the message was not completed; (c) the server dropped the connection
5853 or gave a negative response to the RSET that Exim sends to abort the
5854 transaction. The observed case was a dropped connection after DATA that had
5855 been sent in pipelining mode. That is, the server had advertised PIPELINING
5856 but was not implementing it correctly. The effect of the bug was incorrect
5857 behaviour, such as trying another host, and this could lead to a crash.
5863 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5864 and daemon.c were passed as pointers to ints; they should have been
5865 pointers to socklen_t variables (which are typically unsigned ints).
5867 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5870 3. Fixed a really odd bug that affected only the testing scheme; patching a
5871 certain fixed string in the binary changed the value of another string that
5872 happened to be identical to the end of the original first string.
5874 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5875 name", it returns that address as the IP address. On some operating
5876 systems (e.g. Solaris), it also passes back the IP address string as the
5877 "host name". However, on others (e.g. Linux), it passes back an empty
5878 string. Exim wasn't checking for this, and was changing the host name to an
5879 empty string, assuming it had been canonicalized.
5881 5. Although rare, it is permitted to have more than one PTR record for a given
5882 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5883 all the names associated with an address, because they do in Solaris.
5884 However, it seems that they do not in Linux for data that comes from the
5885 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5886 I found this out when I moved to a new Linux workstation and tried to run
5887 the Exim test suite.
5889 To get round this problem I have changed the code so that it now does its
5890 own call to the DNS to look up PTR records when searching for a host name.
5891 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5892 addresses that are only in /etc/hosts are still found.
5894 This behaviour is, however, controlled by an option called host_lookup_
5895 order, which defaults to "bydns:byaddr". If people want to use the other
5896 order, or indeed, just use one or the other means of lookup, they can
5897 specify it in this variable.
5899 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5900 some operating systems, this comes back from gethostbyaddr() as an empty
5901 string, and this is what Exim used to test for. However, it seems that in
5902 other systems, "." is yielded. Exim now tests for this case too.
5904 7. The values of check_spool_space and check_log_space are now held internally
5905 as a number of kilobytes instead of an absolute number of bytes. If a
5906 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5907 kilobyte. This means that much larger values can be stored.
5909 8. Exim monitor: an attempt to get the action menu when not actually pointing
5910 at a message produces an empty menu entitled "No message selected". This
5911 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5912 no entries in it ("Shell widget menu has zero width and/or height"). So I
5913 have added a single, blank menu entry in this case.
5915 9. Added ${quote_local_part.
5917 10. MIME decoding is now applied to the contents of Subject: header lines when
5920 11. Now that a reference to $sender_host_address automatically causes a reverse
5921 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5922 host lookup before query-style lookups in lists that might use this
5923 variable. This has therefore been abolished, and the "net-" prefix is no
5924 longer necessary for query-style lookups.
5926 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5927 have been a typo for LFLAGS, so it has been changed.
5929 13. The install script calls Exim with "-C /dev/null" in order to find the
5930 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5931 to be output. However, since Exim outputs its version number before the
5932 error, it didn't break the script. It just looked ugly. I fixed this by
5933 always allowing "-C /dev/null" if the caller is root.
5935 14. Ignore overlarge ACL variable number when reading spool file - insurance
5936 against a later release with more variables having written the file.
5938 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5939 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5940 this, as well as the form without the "IPv6" on the front.
5942 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5943 OS/Makefile-Darwin file.
5945 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5946 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5948 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5949 variable. However, some OS use ints for inodes. I've added cast to long int
5950 to get rid of the compiler warning.
5952 19. I had forgotten to lock out "/../" in configuration file names when
5953 ALT_CONFIG_PREFIX was set.
5955 20. Routers used for verification do not need to specify transports. However,
5956 if such a router generated a host list, and callout was configured, Exim
5957 crashed, because it could not find a port number from the (non-existent)
5958 transport. It now assumes port 25 in this circumstance.
5960 21. Added the -t option to exigrep.
5962 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5963 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5964 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5965 them is set, LOOKUP_LSEARCH is forced.
5967 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5969 24. Added sender and host information to the "rejected by local_scan()" log
5970 line; previously there was no indication of these.
5972 25. Added .include_if_exists.
5974 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5975 Linux. It turns out that not all file systems support this. Apparently some
5976 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5977 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5978 not supported on the file descriptor, is now ignored when Exim is trying to
5979 sync a directory. This applies only to Linux.
5981 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5983 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5984 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5987 29. Added support for maildirsize files from supplied patch (modified a bit).
5989 30. The use of :fail: followed by an empty string could lead Exim to respond to
5990 sender verification failures with (e.g.):
5992 550 Verification failed for <xxx>
5993 550 Sender verify failed
5995 where the first response line was missing the '-' that indicates it is not
5996 the final line of the response.
5998 31. The loop for finding the name of the user that called Exim had a hardwired
5999 limit of 10; it now uses the value of finduser_retries, which is used for
6000 all other user lookups.
6002 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6005 33. Exim was neglecting to zero errno before one call of strtol() when
6006 expanding a string and expecting an integer value. On some systems this
6007 resulted in spurious "integer overflow" errors. Also, it was casting the
6008 result into an int without checking.
6010 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6011 did not work. The code looks as if it has *never* worked, though it appears
6012 to have been documented since at least release 1.62. I have made it work.
6014 35. The "timeout_DNS" error in retry rules, also documented since at least
6015 1.62, also never worked. As it isn't clear exactly what this means, and
6016 clearly it isn't a major issue, I have abolished the feature by treating it
6017 as "timeout", and writing a warning to the main and panic logs.
6019 36. The display of retry rules for -brt wasn't always showing the error code
6022 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6023 timeout_connect_A, timeout_connect_MX.
6025 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6026 to the empty sender.
6028 39. The daemon was not analysing the content of -oX till after it had closed
6029 stderr and disconnected from the controlling terminal. This meant that any
6030 syntax errors were only noted on the panic log, and the return code from
6031 the command was 0. By re-arranging the code a little, I've made the
6032 decoding happen first, so such errors now appear on stderr, and the return
6033 code is 1. However, the actual setting up of the sockets still happens in
6034 the disconnected process, so errors there are still only recorded on the
6037 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6038 connections (as happens on some IP stacks) was logged at start up time as
6039 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6040 it from "IPv6 and IPv4", which means that two separate sockets are being
6043 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6044 says whether AF_INET or AF_INET6 was passed as an argument.
6046 42. Exiwhat output was messed up when time zones were included in log
6049 43. Exiwhat now gives more information about the daemon's listening ports,
6050 and whether -tls-on-connect was used.
6052 44. The "port" option of the smtp transport is now expanded.
6054 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6055 silently ignored. Now an error message is written to the main and panic
6058 46. There's a new ACL modifier called "logwrite" which writes to a log file
6059 as soon as it is encountered.
6061 47. Added $local_user_uid and $local_user_gid at routing time.
6063 48. Exim crashed when trying to verify a sender address that was being
6066 49. Exim was recognizing only a space character after ".include". It now also
6067 recognizes a tab character.
6069 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6070 extracting the relevant information from the specification. The man page no
6071 longer contains scrambled data for the -d option, and I've added a section
6072 at the front about calling Exim under different names.
6074 51. Added "extra_headers" argument to the "mail" command in filter files.
6076 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6079 53. Installed eximstats 1.29.
6081 54. Added transport_filter_timeout as a generic transport option.
6083 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6084 Cc: header lines. This was required by RFC 822, but it not required by RFC
6087 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6088 incoming messages that did not have them. Now it does so only if the
6089 message originates locally, that is, if there is no associated remote host
6090 address. When Resent- header lines are present, this applies to the Resent-
6091 lines rather than the non-Resent- lines.
6093 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6094 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6096 58. Messages for configuration errors now include the name of the main
6097 configuration file - useful now that there may be more than one file in a
6098 list (.included file names were always shown).
6100 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6101 for those rare installations that do not start the daemon as root or run it
6102 setuid root. I've cut out the call to initgroups() if the daemon is not
6105 60. The Exim user and group can now be bound into the binary as text strings
6106 that are looked up at the start of Exim's processing.
6108 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6110 62. Added $mailstore_basename variable.
6112 63. Installed patch to sieve.c from Michael Haardt.
6114 64. When Exim failed to open the panic log after failing to open the main log,
6115 the original message it was trying to log was written to stderr and debug
6116 output, but if they were not available (the usual case in production), it
6117 was lost. Now it is written to syslog before the two lines that record the
6118 failures to open the logs.
6120 65. Users' Exim filters run in subprocesses under the user's uid. It is
6121 possible for a "deliver" command or an alias in a "personal" command to
6122 provoke an address rewrite. If logging of address rewriting is configured,
6123 this fails because the process is not running as root or exim. There may be
6124 a better way of dealing with this, but for the moment (because 4.30 needs
6125 to be released), I have disabled address rewrite logging when running a
6126 filter in a non-root, non-exim process.
6132 1. The buildconfig auxiliary program wasn't quoting the value set for
6133 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6134 not defined. This bug was masked in 4.22 by the effect that was fixed in
6137 2. Some messages that were rejected after a message id was allocated were
6138 shown as "incomplete" by exigrep. It no longer does this for messages that
6139 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6141 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6142 have allow_domain_literals set, the ID did not get logged in the <= line.
6143 Domain literals are now always recognized in Message-ID: header lines.
6145 4. The first argument for a ${extract expansion item is the key name or field
6146 number. Leading and trailing spaces in this item were not being ignored,
6147 causing some misleading effects.
6149 5. When deliver_drop_privilege was set, single queue runner processes started
6150 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6151 same command in the process it spins off) were not dropping privilege.
6153 6. When the daemon running as "exim" started a queue runner, it always
6154 re-executed Exim in the spun-off process. This is a waste of effort when
6155 deliver_drop_privilege is set. The new process now just calls the
6156 queue-runner function directly.
6162 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6165 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6166 ignored. Though the use of -oP was forcing the writing of a pid file, it
6167 was always written to the default place.
6169 3. If the message "no IP address found for host xxxx" is generated during
6170 incoming verification, it is now followed by identification of the incoming
6171 connection (so you can more easily find what provoked it).
6173 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6175 5. Added some features to "harden" Exim a bit more against certain attacks:
6177 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6178 be put in Local/Makefile. This is like the never_users runtime option,
6179 but it cannot be overridden. The default setting is "root".
6181 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6182 prefix string with which any file named in a -C command line option
6185 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6186 is retained for -C and -D only if the caller of Exim is root. Without
6187 it, the exim user may also use -C and -D and retain privilege.
6189 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6190 command line option is disabled.
6192 6. Macro names set by the -D option must start with an upper case letter, just
6193 like macro names defined in the configuration file.
6195 7. Added "dereference=" facility to LDAP.
6197 8. Two instances of the typo "uknown" in the source files are fixed.
6199 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6200 the Configure-Makefile script screwed up while processing it.
6202 10. Incorporated PCRE 4.4.
6204 11. The SMTP synchronization check was not operating right at the start of an
6205 SMTP session. For example, it could not catch a HELO sent before the client
6206 waited for the greeting. There is now a check for outstanding input at the
6207 point when the greeting is written. Because of the duplex, asynchronous
6208 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6209 way, but not yet received, when the check is performed.
6211 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6212 on TCP/IP sockets, because this apparently causes some broken clients to
6215 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6216 unchanged) from the Cygwin maintainer.
6218 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6219 was supported instead of testing for mbx. Effectively a typo.
6221 15. The spa authenticator server code was not checking that the input it
6222 received was valid base64.
6224 16. The debug output line for the "set" modifier in ACLs was not showing the
6225 name of the variable that was being set.
6227 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6229 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6230 lookup on its own. Something else was needed to trigger the lookup. For
6231 example, a match in host_lookup or the need for a host name in a host list.
6232 Now, if $sender_host_name is referenced and the host name has not yet been
6233 looked up, a lookup is performed. If the lookup fails, the variable remains
6234 empty, and $host_lookup_failed is set to "1".
6236 19. Added "eqi" as a case-independent comparison operator.
6238 20. The saslauthd authentication condition could segfault if neither service
6239 nor realm was specified.
6241 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6242 error message that was logged was misleading, and incoming SMTP
6243 connections were dropped. The message is now more accurate, and temporary
6244 errors are given to SMTP connections.
6246 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6247 (except RSET) with a 421 error, until QUIT is received. However, it was
6248 failing to send a response to QUIT.
6250 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6251 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6252 ACL is now run after the helo_try_verify_hosts code.
6254 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6255 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6256 case-independent, so other case variants are also recognized). Apparently
6257 some systems use these upper case variants.
6259 25. If more than two messages were waiting for the same host, and a transport
6260 filter was specified for the transport, Exim sent two messages over the
6261 same TCP/IP connection, and then failed with "socket operation on non-
6262 socket" when it tried to send the third.
6264 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6266 27. The extern definition of crypt16() in expand.c was not being excluded when
6267 the OS had its own crypt16() function.
6269 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6270 as a preferred synonym for return_size_limit, both as an option and as an
6273 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6275 30. Changed the default configuration ACL to relax the local part checking rule
6276 for addresses that are not in any local domains. For these addresses,
6277 slashes and pipe symbols are allowed within local parts, but the sequence
6278 /../ is explicitly forbidden.
6280 31. SPA server authentication was not clearing the challenge buffer before
6283 32. log_message in a "warn" ACL statement was writing to the reject log as
6284 well as to the main log, which contradicts the documentation and doesn't
6285 seem right (because no rejection is happening). So I have stopped it.
6287 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6288 However, I am unable to do any testing of this.
6290 34. Fixed an infelicity in the appendfile transport. When checking directories
6291 for a mailbox, to see if any needed to be created, it was accidentally
6292 using path names with one or more superfluous leading slashes; tracing
6293 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6295 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6296 contents are added to the log line that is written for every discarded
6297 recipient. (Previously a log_message setting was ignored.)
6299 36. The ${quote: operator now quotes the string if it is empty.
6301 37. The install script runs exim in order to find its version number. If for
6302 some reason other than non-existence or emptiness, which it checks, it
6303 could not run './exim', it was installing it with an empty version number,
6304 i.e. as "exim-". This error state is now caught, and the installation is
6307 38. An argument was missing from the function that creates an error message
6308 when Exim fails to connect to the socket for saslauthd authentication.
6309 This could cause Exim to crash, or give a corrupted message.
6311 39. Added isip, isip4, and isip6 to ${if conditions.
6313 40. The ACL variables $acl_xx are now saved with the message, and can be
6314 accessed later in routers, transports, and filters.
6316 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6317 strings in the file are not string-expanded.
6319 42. If a MAIL command specified a SIZE value that was too large to fit into an
6320 int variable, the check against message_size_limit failed. Such values are
6321 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6322 day this will have to be increased, but I don't think I want to be around
6323 when emails are that large.
6330 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6331 iconv() is not standard in FreeBSD.
6333 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6334 IPv6 enabled. The observed symptom was a segmentation fault on return from
6335 the function os_common_find_running_interfaces() in src/os.c.
6337 3. In the check_special_case() function in daemon.c I had used "errno" as an
6338 argument name, which causes warnings on some systems. This was basically a
6339 typo, since it was named "eno" in the comments!
6341 4. The code that waits for the clock to tick (at a resolution of some fraction
6342 of a second) so as to ensure message-id uniqueness was always waiting for
6343 at least one whole tick, when it could have waited for less. [This is
6344 almost certainly not relevant at current processor speeds, where it is
6345 unlikely to ever wait at all. But we try to future-proof.]
6347 5. The function that sleeps for a time interval that includes fractions of a
6348 second contained a race. It did not block SIGALRM between setting the
6349 timer, and suspending (a couple of lines later). If the interval was short
6350 and the sigsuspend() was delayed until after it had expired, the suspension
6351 never ended. On busy systems this could lead to processes getting stuck for
6354 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6355 process, before it forks any delivery processes. The open lookup caching
6356 mechanism meant that the open file or database connection was passed into
6357 the delivery process. The problem was that delivery processes always tidy
6358 up cached lookup data. This could cause a problem for the next delivery
6359 process started by the queue runner, because the external queue runner
6360 process does not know about the closure. So the next delivery process
6361 still has data in the lookup cache. In the case of a file lookup, there was
6362 no problem because closing a file descriptor in a subprocess doesn't affect
6363 the parent. However, if the lookup was caching a connection to a database,
6364 the connection was closed, and the second delivery process was likely to
6365 see errors such as "PGSQL: query failed: server closed the connection
6366 unexpectedly". The problem has been fixed by closing all cached lookups
6367 in a queue runner before running a delivery process.
6369 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6370 seem to have the "const" qualifier which it has on other OS. I've
6373 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6374 *of the same type* (client or server) with the same public name that an
6375 error should be diagnosed.
6377 9. When Exim looked up a host name for an IP address, but failed to find the
6378 original IP address when looking up the host name (a safety check), it
6379 output the message "<ip address> does not match any IP for NULL", which was
6380 confusing, to say the least. The bug was that the host name should have
6381 appeared instead of "NULL".
6383 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6384 user that is built into the binary, and the -C or -D options is used, root
6385 privilege is dropped before the configuration file is read. In addition,
6386 logging is switched to stderr instead of the normal log files. If the
6387 configuration then re-defines the Exim user, the unprivileged environment
6388 is probably not what is expected, so Exim logs a panic warning message (but
6391 However, if deliver_drop_privilege is set, the unprivileged state may well
6392 be exactly what is intended, so the warning has been cut out in that case,
6393 and Exim is allowed to try to write to its normal log files.
6399 1. smtp_return_error_details was not giving details for temporary sender
6400 or receiver verification errors.
6402 2. Diagnose a configuration error if two authenticators have the same public
6405 3. Exim used not to create the message log file for a message until the first
6406 delivery attempt. This could be confusing when incoming messages were held
6407 for policy or load reasons. The message log file is now created at the time
6408 the message is received, and an initial "Received" line is written to it.
6410 4. The automatically generated man page for command line options had a minor
6411 bug that caused no ill effects; however, a more serious problem was that
6412 the procedure for building the man page automatically didn't always
6413 operate. Consequently, release 4.20 contains an out-of-date version. This
6414 shouldn't happen again.
6416 5. When building Exim with embedded Perl support, the script that builds the
6417 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6418 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6420 6. The freeze_tell option was not being used for messages that were frozen on
6421 arrival, either by an ACL or by local_scan().
6423 7. Added the smtp_incomplete_transaction log selector.
6425 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6426 was accepting AUTH without a new EHLO.
6428 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6429 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6432 10. Logging of TCP/IP connections (when configured) now happens in the main
6433 daemon process instead of the child process, so that the TCP/IP connection
6434 count is more accurate (but it can never be perfect).
6436 11. The use of "drop" in a nested ACL was not being handled correctly in the
6437 outer ACL. Now, if condition failure induced by the nested "drop" causes
6438 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6439 or "require"), the connection is dropped.
6441 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6442 that yield "discard" can now be used with an "accept" or a "discard" verb,
6443 but an error is generated for any others (because I can't see a useful way
6444 to define what should happen).
6446 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6447 are now processed in the same way as lines in the Exim configuration file.
6448 In particular, continuation lines are supported.
6450 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6452 15. Added -ti meaning -t -i.
6454 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6455 domains, and warn by logging if others are found.
6457 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6458 returned from GIFCONF when Exim is trying to find the list of interfaces on
6459 a host. The code in os.c has been modified to copy each ifreq to an aligned
6460 structure in all cases.
6462 Also, in some cases, the returned ifreq's were being copied to a 'struct
6463 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6464 means the last couple of bytes of an IPv6 address could be chopped if the
6465 ifreq contained only a normal sockaddr (14 bytes storage).
6467 18. Named domain lists were not supported in the hosts_treat_as_local option.
6468 An entry such as +xxxx was not recognized, and was treated as a literal
6471 19. Ensure that header lines added by a DATA ACL are included in the reject log
6472 if the ACL subsequently rejects the message.
6474 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6475 MD5 (which is deprecated).
6477 21. When testing a filter file using -bf, Exim was writing a message when it
6478 took the sender from a "From " line in the message, but it was not doing so
6479 when it took $return_path from a Return-Path: header line. It now does.
6481 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6482 with a valid header line field name (a series of printing characters
6483 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6485 23. Changed "disc" in the source to "disk" to conform to the documentation and
6486 the book and for uniformity.
6488 24. Ignore Sendmail's -Ooption=value command line item.
6490 25. When execve() failed while trying to run a command in a pipe transport,
6491 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6492 could be confused with a return value of 69 from the command itself. This
6493 has been changed to 127, the value the shell returns if it is asked to run
6494 a non-existent command. The wording for the related log line suggests a
6495 non-existent command as the problem.
6497 26. If received_header_text expands to an empty string, do not add a Received:
6498 header line to the message. (Well, it adds a token one on the spool, but
6499 marks it "old" so that it doesn't get used or transmitted.)
6501 27. Installed eximstats 1.28 (addition of -nt option).
6503 28. There was no check for failure on the call to getsockname() in the daemon
6504 code. This can fail if there is a shortage of resources on the system, with
6505 ENOMEM, for example. A temporary error is now given on failure.
6507 29. Contrary to the C standard, it seems that in some environments, the
6508 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6509 program. Exim now does this explicitly; it affects the formatting of
6510 timestamps using strftime().
6512 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6513 complaints. I've now initialized all the variables, to avoid this.
6515 32. Header lines added by a system filter were not being "seen" during
6516 transport-time rewrites.
6518 33. The info_callback() function passed to OpenSSL is set up with type void
6519 (*)(SSL *, int, int), as described somewhere. However, when calling the
6520 function (actually a macro) that sets it up, the type void(*)() is
6521 expected. I've put in a cast to prevent warnings from picky compilers.
6523 34. If a DNS black list lookup found a CNAME record, but there were no A
6524 records associated with the domain it pointed at, Exim crashed.
6526 35. If a DNS black list lookup returned more than one A record, Exim ignored
6527 all but the first. It now scans all returned addresses if a particular IP
6528 value is being sought. In this situation, the contents of the
6529 $dnslist_value variable are a list of all the addresses, separated by a
6532 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6533 to accept a host name and all its aliases if the forward lookup for any of
6534 them yielded the IP address of the incoming connection. Now it accepts only
6535 those names whose forward lookup yields the correct IP address. Any other
6536 names are discarded. This closes a loophole whereby a rogue DNS
6537 administrator could create reverse DNS records to break through a
6538 wildcarded host restriction in an ACL.
6540 37. If a user filter or a system filter that ran in a subprocess used any of
6541 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6542 the wrong values were passed to the pipe command ($thisaddress had the
6543 value of $0, $0 had the value of $1, etc). This bug was introduced by
6544 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6546 38. Improved the line breaking for long SMTP error messages from ACLs.
6547 Previously, if there was no break point between 40 and 75 characters, Exim
6548 left the rest of the message alone. Two changes have been made: (a) I've
6549 reduced the minimum length to 35 characters; (b) if it can't find a break
6550 point between 35 and 75 characters, it looks ahead and uses the first one
6551 that it finds. This may give the occasional overlong line, but at least the
6552 remaining text gets split now.
6554 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6555 file descriptors might be low, and that setting 1000 would always raise it.
6556 It turns out that in some environments, the limit is already over 1000 and
6557 that lowering it causes trouble. So now Exim takes care not to decrease it.
6559 40. When delivering a message, the value of $return_path is set to $sender_
6560 address at the start of routing (routers may change the value). By an
6561 oversight, this default was not being set up when an address was tested by
6562 -bt or -bv, which affected the outcome if any router or filter referred to
6565 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6566 log only when "message" or "log_message" are set. However, if one of the
6567 conditions was an address verification, or a call to a nested ACL, the
6568 messages generated by the underlying test were being passed through. This
6569 no longer happens. The underlying message is available in $acl_verify_
6570 message for both "message" and "log_message" expansions, so it can be
6571 passed through if needed.
6573 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6574 new expansion $bh_ to give the encoded byte string without charset
6575 translation. Translation happens only if iconv() is available; HAVE_ICONV
6576 indicates this at build time. HEADERS_CHARSET gives the charset to
6577 translate to; headers_charset can change it in the configuration, and
6578 "headers charset" can change it in an individual filter file.
6580 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6581 that creates RFC 2047 encoded "words" labels them as that charset instead
6582 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6583 expansion operator; (ii) when Exim creates a From: line for a local
6584 message; (iii) when a header line is rewritten to include a "phrase" part.
6586 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6587 buggy, causing it to skip the first lines of messages whose message ID
6588 ended in 'D'. This would not have bitten before Exim release 4.14, because
6589 message IDs were unlikely to end in 'D' before then. The effect was to have
6590 incorrect size information for certain domains.
6592 45. #include "config.h" was missing at the start of the crypt16.c module. This
6593 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6596 46. If there was a timeout during a "random" callout check, Exim treated it as
6597 a failure of the random address, and carried on sending RSET and the real
6598 address. If the delay was just some slowness somewhere, the response to the
6599 original RCPT would be taken as a response to RSET and so on, causing
6600 mayhem of various kinds.
6602 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6603 when I implemented it. It didn't allow for the fact that some option values
6604 may legitimately be negative (e.g. size_addition), and it didn't even do
6605 the right test for positive values.
6607 48. Domain names in DNS records are case-independent. Exim always looks them up
6608 in lower case. Some resolvers return domain names in exactly the case they
6609 appear in the zone file, that is, they may contain uppercase letters. Not
6610 all resolvers do this - some return always lower case. Exim was treating a
6611 change of case by a resolver as a change of domain, similar to a widening
6612 of a domain abbreviation. This triggered its re-routing code and so it was
6613 trying to route what was effectively the same domain again. This normally
6614 caused routing to fail (because the router wouldn't handle the domain
6615 twice). Now Exim checks for this case specially, and just changes the
6616 casing of the domain that it ultimately uses when it transmits the message
6619 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6622 50. If a filter generated a file delivery with a non-absolute name (possible if
6623 no home directory exists for the router), the forbid_file option was not
6626 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6627 the existing equality matching.
6629 52. Exim was using ints instead of ino_t variables in some places where it was
6630 dealing with inode numbers.
6632 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6633 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6634 called TMPDIR, and if it finds it is different, it changes its value.
6636 54. The smtp_printf() function is now made available to local_scan() so
6637 additional output lines can be written before returning. There is also an
6638 smtp_fflush() function to enable the detection of a dropped connection.
6639 The variables smtp_input and smtp_batched_input are exported to
6642 55. Changed the default runtime configuration: the message "Unknown user"
6643 has been removed from the ACL, and instead placed on the localuser router,
6644 using the cannot_route_message feature. This means that any verification
6645 failures that generate their own messages won't get overridden. Similarly,
6646 the "Unrouteable address" message that was in the ACL for unverifiable
6647 relay addresses has also been removed.
6649 56. Added hosts_avoid_esmtp to the smtp transport.
6651 57. The exicyclog script was not checking for the esoteric option
6652 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6653 will work only if exicyclog is run under the appropriate euid.
6655 58. Following a discussion on the list, the rules by which Exim recognises line
6656 endings on incoming messages have been changed. The -dropcr and drop_cr
6657 options are now no-ops, retained only for backwards compatibility. The
6658 following line terminators are recognized: LF CRLF CR. However, special
6659 processing applies to CR:
6661 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6662 nor a local message in the state where . is a terminator.
6664 (ii) If a bare CR is encountered in a header line, an extra space is added
6665 after the line terminator so as not to end the header. The reasoning
6666 behind this is that bare CRs in header lines are most likely either
6667 to be mistakes, or people trying to play silly games.
6669 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6670 was being incorrectly given as 18 bytes larger than it should have been.
6671 This is a VOB (very old bug).
6673 60. This may never have affected anything current, but just in case it has:
6674 When the local host is found other than at the start of a list of hosts,
6675 the local host, those with the same MX, and any that follow, are discarded.
6676 When the list in question was part of a longer list of hosts, the following
6677 hosts (not currently being processed) were also being discarded. This no
6678 longer happens. I'm not sure if this situation could ever has previously
6681 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6684 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6685 header. This is something that is recommended in a new Internet Draft, and
6686 is something that is documented as being done by Sendmail. There are two
6687 possible values. For messages generated by the autoreply transport, Exim
6690 Auto-Submitted: auto-replied
6692 whereas for all other generated messages (e.g. bounces) it adds
6694 Auto-Submitted: auto-generated
6696 63. The "personal" condition in filters now includes a test for the
6697 Auto-Submitted: header. If it contains the string "auto-" the message it
6698 not considered personal.
6700 64. Added rcpt_include_affixes as a generic transport option.
6702 65. Added queue_only_override (default true).
6704 66. Added the syslog_duplication option.
6706 67. If what should have been the first header line of a message consisted of
6707 a space followed by a colon, Exim was mis-interpreting it as a header line.
6708 It isn't of course - it is syntactically invalid and should therefore be
6709 treated as the start of the message body. The misbehaviour could have
6710 caused a number of strange effects, including loss of data in subsequent
6711 header lines, and spool format errors.
6713 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6714 client host had authenticated. This control can now be exercised by an ACL
6715 for more flexibility.
6717 69. By default, callouts do not happen when testing with -bh. There is now a
6718 variant, -bhc, which does actually run the callout code, including
6719 consulting and updating the callout cache.
6721 70. Added support for saslauthd authentication, courtesy of Alexander
6724 71. If statvfs() failed on the spool or log directories while checking their
6725 size for availability, Exim confusingly gave the error "space shortage".
6726 Furthermore, in debugging mode it crashed with a floating point exception.
6727 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6728 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6729 serious problem, Exim now writes to the main and panic logs when this
6730 happens, with details of the failure. It then refuses to accept the
6731 incoming message, giving the message "spool directory problem" or "log
6732 directory problem" with a 421 code for SMTP messages.
6734 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6735 0, 1, and 2 exist, because some OS complain for execs without them (see
6736 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6737 descriptors. However, the code omitted to check that the open succeeded,
6738 causing mysterious errors if for some reason the permissions on /dev/null
6739 got screwed. Now Exim writes a message to the main and panic logs, and
6740 bombs out if it can't open /dev/null.
6742 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6743 interact so that it is all more flexible. It is supposed to remain
6744 backwards compatible. Also added extra_local_interfaces.
6746 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6747 to bomb out with an assertion failure - to the client this appears as a
6748 connection drop. This problem occurs in the part of the code that was taken
6749 from the Samba project. Fortunately, the assertion is in a very simple
6750 function, so I have fixed this by reproducing the function inline in the
6751 one place where it is called, and arranging for authentication to fail
6752 instead of killing the process with assert().
6754 75. The SPA client code was not working when the server requested OEM rather
6755 than Unicode encoding.
6757 76. Added code to make require_files with a specific uid setting more usable in
6758 the case where statting the file as root fails - usually a non-root-mounted
6759 NFS file system. When this happens and the failure is EACCES, Exim now
6760 forks a subprocess and does the per-uid checking as the relevant uid.
6762 77. Added process_log_path.
6764 78. If log_file_path was not explicitly set, a setting of check_log_space or
6765 check_log_inodes was ignored.
6767 79. If a space check for the spool or log partitions fails, the incident is now
6768 logged. Of course, in the latter case the data may get lost...
6770 80. Added the %p formatting code to string_format() so that it can be used to
6771 print addresses in debug_print(). Adjusted all the address printing in the
6772 debugging in store.c to use %p rather than %d.
6774 81. There was a concern that a line of code in smtp_in.c could overflow a
6775 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6776 initially expressed, the concern was not well-founded, because trailing
6777 spaces are removed early. However, if the trailing spaces were followed by
6778 a NULL, they did not get removed, so the overflow was possible. Two fixes
6781 (a) I re-wrote the offending code in a cleaner fashion.
6782 (b) If an incoming SMTP command contains a NULL character, it is rejected
6785 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6786 runs initgroups(), so that if the Exim user is in any additional groups,
6787 they will be used during message reception.
6793 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob