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 Certificate or OCSP information. TLS cipher information is still logged.
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.
37 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
38 than 255 are no longer allowed.
40 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
41 Disable the session-cache too, which might reduce our load. Since we
42 currrectly use a new context for every connection, both as server and
43 client, there is no benefit for these.
44 GnuTLS appears to not support tickets server-side by default (we don't
45 call gnutls_session_ticket_enable_server()) but client side is enabled
46 by default on recent versions (3.1.3 +) unless the PFS priority string
49 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
50 <https://reproducible-builds.org/specs/source-date-epoch/>.
52 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
53 the check for any unsuccessful recipients did not notice the limit, and
54 erroneously found still-pending ones.
56 JH/08 Pipeline CHUNKING command and data together, on kernels that support
57 MSG_MORE. Only in-clear (not on TLS connections).
59 JH/09 Avoid using a temporary file during transport using dkim. Unless a
60 transport-filter is involved we can buffer the headers in memory for
61 creating the signature, and read the spool data file once for the
62 signature and again for transmission.
64 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
65 4.77 as the kernel support then wasn't solid, having issues in 64bit
66 mode. Now, it's been long enough. Add support for FreeBSD also.
68 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
69 case where the routing stage had gathered several addresses to send to
70 a host before calling the transport for the first, we previously failed
71 to close down TLS in the old transport process before passing the TCP
72 connection to the new process. The new one sent a STARTTLS command
73 which naturally failed, giving a failed delivery and bloating the retry
74 database. Investigation and fix prototype from Wolfgang Breyha.
76 JH/12 Fix check on SMTP command input synchronisation. Previously there were
77 false-negatives in the check that the sender had not preempted a response
78 or prompt from Exim (running as a server), due to that code's lack of
79 awareness of the SMTP input buffering.
81 PP/04 Add commandline_checks_require_admin option.
82 Exim drops privileges sanely, various checks such as -be aren't a
83 security problem, as long as you trust local users with access to their
84 own account. When invoked by services which pass untrusted data to
85 Exim, this might be an issue. Set this option in main configuration
86 AND make fixes to the calling application, such as using `--` to stop
89 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
90 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
91 responses to those, into a single TLS record each way (this usually means
92 a single packet). As a side issue, smtp_enforce_sync now works on TLS
95 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
96 affects you only if you're dancing at the edge of the param size limits.
97 If you are, and this message makes sense to you, then: raise the
98 configured limit or use OpenSSL 1.1. Nothing we can do for older
101 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
102 cmdline element to get the documented default one. Previously it was
105 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
106 are unsuable for non-message-specific reasons - eg. connection timeout,
107 banner-time rejection.
109 JH/16 Fix logging of delivery remote port, when specified by router, under
116 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
117 than -2003 did; needs libidn2 in addition to libidn.
119 JH/02 The path option on a pipe transport is now expanded before use.
121 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
122 Patch provided by "Björn", documentation fix added too.
124 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
125 missing a wire-to-host endian conversion.
127 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
128 close after a BDAT command line could be taken as a following command,
129 giving a synch failure. Fix by only checking for synch immediately
130 before acknowledging the chunk.
132 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
133 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
134 macro. Patches provided by Josh Soref.
136 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
137 Previously we did not; the RFC seems ambiguous and VRFY is not listed
138 by IANA as a service extension. However, John Klensin suggests that we
141 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
142 the dkim code may be unix-mode line endings rather than smtp wire-format
143 CRLF, so prepend a CR to any bare LF.
145 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
146 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
148 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
149 the first were themselves being wrongly included in the feed into dkim
150 processing; with most chunk sizes in use this resulted in an incorrect
151 body hash calculated value.
153 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
154 DKIM signature block, for verification. Although advised against by
155 standards it is specifically not ruled illegal.
157 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
159 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
160 missing a body hash (the bh= tag).
162 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
163 It seems that HAProxy sends the Proxy Protocol information in clear and
164 only then does a TLS startup, so do the same.
166 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
167 TCP connections (such as for Spamd) unless the daemon successfully set
168 Fast Open mode on its listening sockets. This fixes breakage seen on
169 too-old kernels or those not configured for Fast Open, at the cost of
170 requiring both directions being enabled for TFO, and TFO never being used
171 by non-daemon-related Exim processes.
173 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
174 endings, at least on the first header line. Try to canonify any that get
175 past that check, despite the cost.
177 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
178 now limited to an arbitrary five deep, while parsing addresses with the
179 strip_excess_angle_brackets option enabled.
181 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
182 instead leave the unprompted TLS handshake in socket buffer for the
183 TLS library to consume.
185 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
187 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
189 JH/16 Drop variables when they go out of scope. Memory management drops a whole
190 region in one operation, for speed, and this leaves assigned pointers
191 dangling. Add checks run only under the testsuite which checks all
192 variables at a store-reset and panics on a dangling pointer; add code
193 explicitly nulling out all the variables discovered. Fixes one known
194 bug: a transport crash, where a dangling pointer for $sending_ip_address
195 originally assigned in a verify callout, is re-used.
197 PP/06 Drop '.' from @INC in various Perl scripts.
199 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
201 PP/08 Reduce a number of compilation warnings under clang; building with
202 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
203 should be warning-free.
205 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
207 HS/01 Fix portability problems introduced by PP/08 for platforms where
208 realloc(NULL) is not equivalent to malloc() [SunOS et al].
210 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
211 chunk. This allows us to accept broken chunked messages. We need a more
212 general solution here.
214 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
215 already-broken messages in the queue.
217 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
219 JH/19 Fix reference counting bug in routing-generated-address tracking.
225 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
226 supports it and a size is available (ie. the sending peer gave us one).
228 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
229 years of being deprecated). The replacements are the ACLs
230 acl_smtp_mime and acl_not_smtp_mime.
232 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
233 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
234 or even an in-clear connection were permitted. Now, if the host lookup
235 was dnssec and dane was requested then the host is only used if the
236 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
237 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
238 if one fails this test.
239 This means that a poorly-configured remote DNS will make it incommunicado;
240 but it protects against a DNS-interception attack on it.
242 JH/04 Bug 1810: make continued-use of an open smtp transport connection
243 non-noisy when a race steals the message being considered.
245 JH/05 If main configuration option tls_certificate is unset, generate a
246 self-signed certificate for inbound TLS connections.
248 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
249 in rewrites and routers.
251 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
252 and logged a warning sing 4.83; now they are a configuration file error.
254 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
255 (lacking @domain). Apply the same qualification processing as RCPT.
257 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
259 JH/10 Support ${sha256:} applied to a string (as well as the previous
262 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
263 a cutthrough deliver is pending, as we always want to make a connection.
264 This also avoids re-routing the message when later placing the cutthrough
265 connection after a verify cache hit.
266 Do not update it with the verify result either.
268 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
269 when routing results in more than one destination address.
271 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
272 signing (which inhibits the cutthrough capability). Previously only
273 the presence of an option was tested; now an expansion evaluating as
274 empty is permissible (obviously it should depend only on data available
275 when the cutthrough connection is made).
277 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
278 the relevant preceding SMTP command did not note the pipelining mode.
280 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
281 Previously they were not counted.
283 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
284 as one having no matching records. Previously we deferred the message
285 that needed the lookup.
287 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
288 distinguished as "(=".
290 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
291 for missing MX records. Previously it only worked for missing A records.
293 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
295 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
296 after the data-go-ahead and data-ack. Patch from Jason Betts.
298 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
299 even for a "none" policy. Patch from Tony Meyer.
301 JH/22 Fix continued use of a connection for further deliveries. If a port was
302 specified by a router, it must also match for the delivery to be
305 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
306 When one of the recipients of a message was unsuitable for the connection
307 (has no matching addresses), we lost track of needing to mark it
308 deferred. As a result mail would be lost.
310 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
312 JH/25 Decoding ACL controls is now done using a binary search; the source code
313 takes up less space and should be simpler to maintain. Merge the ACL
314 condition decode tables also, with similar effect.
316 JH/26 Fix problem with one_time used on a redirect router which returned the
317 parent address unchanged. A retry would see the parent address marked as
318 delivered, so not attempt the (identical) child. As a result mail would
321 JH/27 Fix a possible security hole, wherein a process operating with the Exim
322 UID can gain a root shell. Credit to http://www.halfdog.net/ for
323 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
326 JH/28 Enable {spool,log} filesystem space and inode checks as default.
327 Main config options check_{log,spool}_{inodes,space} are now
328 100 inodes, 10MB unless set otherwise in the configuration.
330 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
331 Previously it only applied to the main-section connection policy
334 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
336 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
337 by me. Added RFC7919 DH primes as an alternative.
339 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
340 are not in the system include path.
342 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
343 GnuTLS, when a session startup failed (eg because the client disconnected)
344 Exim did stdio operations after fclose. This was exposed by a recent
345 change which nulled out the file handle after the fclose.
347 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
348 signed directly by the cert-signing cert, rather than an intermediate
349 OCSP-signing cert. This is the model used by LetsEncrypt.
351 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
353 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
354 an incoming connection.
356 HS/02 Bug 1802: Do not half-close the connection after sending a request
359 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
360 fallback to "prime256v1".
362 JH/34 SECURITY: Use proper copy of DATA command in error message.
363 Could leak key material. Remotely exploitable. CVE-2016-9963.
369 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
370 and 3.4.4 - once the server is enabled to respond to an OCSP request
371 it does even when not requested, resulting in a stapling non-aware
372 client dropping the TLS connection.
374 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
375 support variable-length bit vectors. No functional change.
377 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
378 The I= interface field on outgoing lines is now after the H= remote
379 host field, same as incoming lines. There is a separate
380 outgoing_interface log selector which allows you to disable the
383 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
384 If not running log_selector +smtp_connection the mainlog would be held
385 open indefinitely after a "too many connections" event, including to a
386 deleted file after a log rotate. Leave the per net connection logging
387 leaving it open for efficiency as that will be quickly detected by the
388 check on the next write.
390 HS/01 Bug 1671: Fix post transport crash.
391 Processing the wait-<transport> messages could crash the delivery
392 process if the message IDs didn't exist for some reason. When
393 using 'split_spool_directory=yes' the construction of the spool
394 file name failed already, exposing the same netto behaviour.
396 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
397 mime_regex ACL conditions.
399 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
400 to DSN fail messages (bounces): remote IP, remote greeting, remote response
401 to HELO, local diagnostic string.
403 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
404 log line to debug. Even when configured with a tls authenticator many
405 client connections are expected to not authenticate in this way, so
406 an authenticate fail is not an error.
408 HS/02 Add the Exim version string to the process info. This way exiwhat
409 gives some more detail about the running daemon.
411 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
412 matter for fast-change records such as DNSBLs.
414 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
415 retry record, even if constant. There may be multiple transports with
416 different interface settings and the retry behaviour needs to be kept
419 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
421 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
423 JH/10 Bug 840: fix log_defer_output option of pipe transport
425 JH/11 Bug 830: use same host for all RCPTS of a message, even under
426 hosts_randomize. This matters a lot when combined with mua_wrapper.
428 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
429 ${quote_pgsql:<string>} operator.
431 JH/13 Bug 1708: avoid misaligned access in cached lookup.
433 JH/14 Change header file name for freeradius-client. Relevant if compiling
434 with Radius support; from the Gentoo tree and checked under Fedora.
436 JH/15 Bug 1712: Introduce $prdr_requested flag variable
438 JH/16 Bug 1714: Permit an empty string as expansion result for transport
439 option transport_filter, meaning no filtering.
441 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
443 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
444 defaults to "*" (all hosts). The variable is now available when not built
445 with TLS, default unset, mainly to enable keeping the testsuite sane.
446 If a server certificate is not supplied (via tls_certificate) an error is
447 logged, and clients will find TLS connections fail on startup. Presumably
448 they will retry in-clear.
449 Packagers of Exim are strongly encouraged to create a server certificate
450 at installation time.
452 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
453 with the $config_file variable.
455 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
456 in transport context, after the attempt, and per-recipient. The latter type
457 is per host attempted. The event data is the error message, and the errno
458 information encodes the lookup type (A vs. MX) used for the (first) host,
459 and the trailing two digits of the smtp 4xx response.
461 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
462 to write to mainlog (or rejectlog, paniclog) in the window between file
463 creation and permissions/ownership being changed. Particularly affects
464 installations where exicyclog is run as root, rather than exim user;
465 result is that the running daemon panics and dies.
467 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
469 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
470 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
471 "pri" and "weight". Note that the previous implicit priority given by the
472 list order is no longer honoured.
474 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
477 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
478 by defining SUPPORT_SOCKS.
480 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
481 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
482 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
483 variables are renamed to proxy_{local,external}_{address,port}.
485 JH/27 Move Internationalisation support from Experimental to mainline, enabled
486 for a build by defining SUPPORT_I18N
488 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
489 of the query string, and make ${quote_redis:} do that quoting.
491 JH/29 Move Events support from Experimental to mainline, enabled by default
492 and removable for a build by defining DISABLE_EVENT.
494 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
496 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
497 cached by the daemon.
499 JH/32 Move Redis support from Experimental to mainline, enabled for a build
500 by defining LOOKUP_REDIS. The libhiredis library is required.
502 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
503 keys are given for lookup.
505 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
506 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
507 only supported when built with TLS support. The PolarSSL SHA routines
508 are still used when the TLS library is too old for convenient support.
510 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
511 openssl_options), for security. OpenSSL forces this from version 1.1.0
512 server-side so match that on older versions.
514 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
515 allocation for $value could be released as the expansion processing
516 concluded, but leaving the global pointer active for it.
518 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
519 and to use the domains and local_parts ACL conditions.
521 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
522 incorrectly not doubled on cutthrough transmission, hence seen as a
523 body-termination at the receiving system - resulting in truncated mails.
524 Commonly the sender saw a TCP-level error, and retransmitted the message
525 via the normal store-and-forward channel. This could result in duplicates
526 received - but deduplicating mailstores were liable to retain only the
527 initial truncated version.
529 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
531 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
533 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
534 we're in there, support oversigning also; bug 1309.
536 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
538 HS/04 Add support for keep_environment and add_environment options.
540 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
541 either intentional arithmetic overflow during PRNG, or testing config-
544 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
545 delivery resulted in actual delivery. Cancel cutthrough before DATA
548 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
549 rejects a recipient: pass the reject to the originator.
551 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
552 Many were false-positives and ignorable, but it's worth fixing the
555 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
556 for the new environment-manipulation done at startup. Move the routines
557 from being local to tls.c to being global via the os.c file.
559 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
560 an extract embedded as result-arg for a map, the first arg for extract
561 is unavailable so we cannot tell if this is a numbered or keyed
562 extraction. Accept either.
568 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
571 JH/02 The smtp transport option "multi_domain" is now expanded.
573 JH/03 The smtp transport now requests PRDR by default, if the server offers
576 JH/04 Certificate name checking on server certificates, when exim is a client,
577 is now done by default. The transport option tls_verify_cert_hostnames
578 can be used to disable this per-host. The build option
579 EXPERIMENTAL_CERTNAMES is withdrawn.
581 JH/05 The value of the tls_verify_certificates smtp transport and main options
582 default to the word "system" to access the system default CA bundle.
583 For GnuTLS, only version 3.0.20 or later.
585 JH/06 Verification of the server certificate for a TLS connection is now tried
586 (but not required) by default. The verification status is now logged by
587 default, for both outbound TLS and client-certificate supplying inbound
590 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
593 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
594 Status Notification (bounce) messages are now MIME format per RFC 3464.
595 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
596 under the control of the dsn_advertise_hosts option, and routers may
597 have a dsn_lasthop option.
599 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
600 default, modifiable by a malware= option. The list separator for
601 the options can now be changed in the usual way. Bug 68.
603 JH/10 The smtp_receive_timeout main option is now expanded before use.
605 JH/11 The incoming_interface log option now also enables logging of the
606 local interface on delivery outgoing connections.
608 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
609 if the interface and destination host and port all match.
611 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
614 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
615 Patch from Andrew Lewis.
617 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
618 now supports optional time-restrictions, weighting, and priority
619 modifiers per server. Patch originally by <rommer@active.by>.
621 JH/16 The spamd_address main option now supports a mixed list of local
622 and remote servers. Remote servers can be IPv6 addresses, and
623 specify a port-range.
625 JH/17 Bug 68: The spamd_address main option now supports an optional
626 timeout value per server.
628 JH/18 Bug 1581: Router and transport options headers_add/remove can
629 now have the list separator specified.
631 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
634 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
637 JH/21 Support for the A6 type of dns record is withdrawn.
639 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
640 rather than the verbs used.
642 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
643 from 255 to 1024 chars.
645 JH/24 Verification callouts now attempt to use TLS by default.
647 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
648 are generic router options now. The defaults didn't change.
650 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
651 Original patch from Alexander Shikoff, worked over by JH.
653 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
654 files if ZCAT_COMMAND is not executable.
656 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
658 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
660 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
661 Normally benign, it bites when the pair was led to by a CNAME;
662 modern usage is to not canonicalize the domain to a CNAME target
663 (and we were inconsistent anyway for A-only vs AAAA+A).
665 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
667 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
668 when evaluating $sender_host_dnssec.
670 JH/31 Check the HELO verification lookup for DNSSEC, adding new
671 $sender_helo_dnssec variable.
673 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
675 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
677 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
679 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
680 documented as working, but never had. Support all but $spam_report.
682 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
683 added for tls authenticator.
685 HS/03 Add perl_taintmode main config option
691 TL/01 When running the test suite, the README says that variables such as
692 no_msglog_check are global and can be placed anywhere in a specific
693 test's script, however it was observed that placement needed to be near
694 the beginning for it to behave that way. Changed the runtest perl
695 script to read through the entire script once to detect and set these
696 variables, reset to the beginning of the script, and then run through
697 the script parsing/test process like normal.
699 TL/02 The BSD's have an arc4random API. One of the functions to induce
700 adding randomness was arc4random_stir(), but it has been removed in
701 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
702 function when detected.
704 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
705 cause callback expansion.
707 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
708 syntax errors in an expansion can be treated as a string instead of
709 logging or causing an error, due to the internal use of bool_lax
710 instead of bool when processing it.
712 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
713 server certificates when making smtp deliveries.
715 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
717 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
719 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
721 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
722 Merged patch from Sebastian Wiedenroth.
724 JH/05 Fix results-pipe from transport process. Several recipients, combined
725 with certificate use, exposed issues where response data items split
726 over buffer boundaries were not parsed properly. This eventually
727 resulted in duplicates being sent. This issue only became common enough
728 to notice due to the introduction of connection certificate information,
729 the item size being so much larger. Found and fixed by Wolfgang Breyha.
731 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
732 size buffer was used, resulting in syntax errors when an expansion
735 JH/07 Add support for directories of certificates when compiled with a GnuTLS
736 version 3.3.6 or later.
738 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
739 is EXPERIMENTAL_EVENT, the main-configuration and transport options
740 both become "event_action", the variables become $event_name, $event_data
741 and $event_defer_errno. There is a new variable $verify_mode, usable in
742 routers, transports and related events. The tls:cert event is now also
743 raised for inbound connections, if the main configuration event_action
746 TL/06 In test suite, disable OCSP for old versions of openssl which contained
747 early OCSP support, but no stapling (appears to be less than 1.0.0).
749 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
750 server certificate names available under the smtp transport option
751 "tls_verify_cert_hostname" now do not permit multi-component wildcard
754 JH/10 Time-related extraction expansions from certificates now use the main
755 option "timezone" setting for output formatting, and are consistent
756 between OpenSSL and GnuTLS compilations. Bug 1541.
758 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
759 encoded parameter in the incoming message. Bug 1558.
761 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
762 include certificate info, eximon was claiming there were spoolfile
765 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
767 JH/14 Log delivery-related information more consistently, using the sequence
768 "H=<name> [<ip>]" wherever possible.
770 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
771 are problematic for Debian distribution, omit them from the release
774 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
776 JH/16 Fix string representation of time values on 64bit time_t architectures.
779 JH/17 Fix a null-indirection in certextract expansions when a nondefault
780 output list separator was used.
785 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
786 checkers that were complaining about end of non-void function with no
789 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
790 This was a regression introduced in 4.83 by another bugfix.
792 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
794 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
795 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
801 TF/01 Correctly close the server side of TLS when forking for delivery.
803 When a message was received over SMTP with TLS, Exim failed to clear up
804 the incoming connection properly after forking off the child process to
805 deliver the message. In some situations the subsequent outgoing
806 delivery connection happened to have the same fd number as the incoming
807 connection previously had. Exim would try to use TLS and fail, logging
808 a "Bad file descriptor" error.
810 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
811 utilities have not been installed.
813 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
814 temporary space as the ACL may create new global variables.
816 TL/01 LDAP support uses per connection or global context settings, depending
817 upon the detected version of the libraries at build time.
819 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
820 to extract and use the src ip:port in logging and expansions as if it
821 were a direct connection from the outside internet. PPv2 support was
822 updated based on HAProxy spec change in May 2014.
824 JH/02 Add ${listextract {number}{list}{success}{fail}}.
826 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
827 Properly escape header and check for NULL return.
829 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
832 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
834 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
835 characters in header names, implemented as a verify condition.
836 Contributed by Michael Fischer v. Mollard.
838 TL/05 Rename SPF condition results err_perm and err_temp to standardized
839 results permerror and temperror. Previous values are deprecated but
840 still accepted. In a future release, err_perm and err_temp will be
841 completely removed, which will be a backward incompatibility if the
842 ACL tests for either of these two old results. Patch contributed by
843 user bes-internal on the mailing list.
845 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
847 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
848 selectors, in both main and reject logs.
850 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
853 JH/07 Add malware type "sock" for talking to simple daemon.
855 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
857 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
858 routers/transports under cutthrough routing.
860 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
861 numbers. Touch up "bool" conditional to keep the same definition.
863 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
865 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
867 JH/12 Expand items in router/transport headers_add or headers_remove lists
868 individually rather than the list as a whole. Bug 1452.
870 Required for reasonable handling of multiple headers_ options when
871 they may be empty; requires that headers_remove items with embedded
872 colons must have them doubled (or the list-separator changed).
874 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
875 view the policy declared in the DMARC record. Currently, $dmarc_status
876 is a combined value of both the record presence and the result of the
879 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
881 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
882 dnslookup router and the smtp transport (applying to the forward
885 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
886 of ldap servers used for a specific lookup. Patch provided by Heiko
889 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
890 New variable $lookup_dnssec_authenticated for observability.
892 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
893 Patch submitted by Lars Timman.
895 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
897 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
898 Requires trusted mode and valid format message id, aborts otherwise.
899 Patch contributed by Heiko Schlichting.
901 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
902 certextract with support for various fields. Bug 1358.
904 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
905 is requested by default, modifiable by smtp transport option
908 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
909 operate on certificate variables to give certificate fingerprints
910 Also new ${sha256:cert_variable}.
912 JH/23 The PRDR feature is moved from being Experimental into the mainline.
914 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
915 Christian Aistleitner.
917 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
919 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
920 file. Patch from Wolfgang Breyha.
922 JH/25 Expand the coverage of the delivery $host and $host_address to
923 client authenticators run in verify callout. Bug 1476.
925 JH/26 Port service names are now accepted for tls_on_connect_ports, to
926 align with daemon_smtp_ports. Bug 72.
928 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
929 support and error reporting did not work properly.
931 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
932 and is readable. Patch from Andrew Colin Kissa.
934 TL/14 Enhance documentation of ${run expansion and how it parses the
935 commandline after expansion, particularly in the case when an
936 unquoted variable expansion results in an empty value.
938 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
940 PP/02 Fix internal collision of T_APL on systems which support RFC3123
941 by renaming away from it. Addresses GH issue 15, reported by
944 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
946 TL/15 SECURITY: prevent double expansion in math comparison functions
947 (can expand unsanitized data). Not remotely exploitable.
954 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
956 PP/02 Make -n do something, by making it not do something.
957 When combined with -bP, the name of an option is not output.
959 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
962 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
963 $sender_host_name and config options to manage this, and basic check
966 PP/05 DSCP support for outbound connections and control modifier for inbound.
968 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
969 (Only plugin which currently uses this is kerberos4, which nobody should
970 be using, but we should make it available and other future plugins might
971 conceivably use it, even though it would break NAT; stuff *should* be
972 using channel bindings instead).
974 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
975 name; added for Sendmail compatibility; requires admin caller.
976 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
977 just ignore it); requires trusted caller.
978 Also parse but ignore: -Ac -Am -X<logfile>
981 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
983 TL/02 Add +smtp_confirmation as a default logging option.
985 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
986 Patch by Magnus Holmgren from 2007-02-20.
988 TL/04 Bugzilla 1281 - Spec typo.
989 Bugzilla 1283 - Spec typo.
990 Bugzilla 1290 - Spec grammar fixes.
992 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
994 TL/06 Add Experimental DMARC support using libopendmarc libraries.
996 TL/07 Fix an out of order global option causing a segfault. Reported to dev
997 mailing list by by Dmitry Isaikin.
999 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1001 JH/02 Support "G" suffix to numbers in ${if comparisons.
1003 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1005 NM/01 Bugzilla 1197 - Spec typo
1006 Bugzilla 1196 - Spec examples corrections
1008 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1010 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1011 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1014 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1015 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1017 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1018 "acl {{name}{arg}...}", and optional args on acl condition
1021 JH/05 Permit multiple router/transport headers_add/remove lines.
1023 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1025 JH/07 Avoid using a waiting database for a single-message-only transport.
1026 Performance patch from Paul Fisher. Bugzilla 1262.
1028 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1031 JH/09 Add $headers_added variable, with content from use of ACL modifier
1032 add_header (but not yet added to the message). Bugzilla 199.
1034 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1035 Pulled from Bugzilla 817 by Wolfgang Breyha.
1037 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1039 (nb: this is the same fix as in Exim 4.80.1)
1041 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1044 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1047 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1049 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1050 advertise SMTP AUTH mechanism to us, instead of a generic
1051 protocol violation error. Also, make Exim more robust to bad
1052 data from the Dovecot auth socket.
1054 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1056 When a queue runner is handling a message, Exim first routes the
1057 recipient addresses, during which it prunes them based on the retry
1058 hints database. After that it attempts to deliver the message to
1059 any remaining recipients. It then updates the hints database using
1062 So if a recipient address works intermittently, it can get repeatedly
1063 deferred at routing time. The retry hints record remains fresh so the
1064 address never reaches the final cutoff time.
1066 This is a fairly common occurrence when a user is bumping up against
1067 their storage quota. Exim had some logic in its local delivery code
1068 to deal with this. However it did not apply to per-recipient defers
1069 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1071 This change adds a proper retry rule check during routing so that the
1072 final cutoff time is checked against the message's age. We only do
1073 this check if there is an address retry record and there is not a
1074 domain retry record; this implies that previous attempts to handle
1075 the address had the retry_use_local_parts option turned on. We use
1076 this as an approximation for the destination being like a local
1077 delivery, as in LMTP.
1079 I suspect this new check makes the old local delivery cutoff check
1080 redundant, but I have not verified this so I left the code in place.
1082 TF/02 Correct gecos expansion when From: is a prefix of the username.
1084 Test 0254 submits a message to Exim with the header
1088 When I ran the test suite under the user fanf2, Exim expanded
1089 the header to contain my full name, whereas it should have added
1090 a Resent-Sender: header. It erroneously treats any prefix of the
1091 username as equal to the username.
1093 This change corrects that bug.
1095 GF/01 DCC debug and logging tidyup
1096 Error conditions log to paniclog rather than rejectlog.
1097 Debug lines prefixed by "DCC: " to remove any ambiguity.
1099 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1101 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1102 Bug spotted by Jeremy Harris; was flawed since initial commit.
1103 Would have resulted in OCSP responses post-SNI triggering an Exim
1104 NULL dereference and crash.
1106 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1108 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1109 Bug detection, analysis and fix by Samuel Thibault.
1110 Bugzilla 1331, Debian bug #698092.
1112 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1114 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1115 Server implementation by Todd Lyons, client by JH.
1116 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1117 config variable "prdr_enable" controls whether the server
1118 advertises the facility. If the client requests PRDR a new
1119 acl_data_smtp_prdr ACL is called once for each recipient, after
1120 the body content is received and before the acl_smtp_data ACL.
1121 The client is controlled by both of: a hosts_try_prdr option
1122 on the smtp transport, and the server advertisement.
1123 Default client logging of deliveries and rejections involving
1124 PRDR are flagged with the string "PRDR".
1126 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1127 fclose(). Diagnosis by Todd Lyons.
1129 PP/17 Update configure.default to handle IPv6 localhost better.
1130 Patch by Alain Williams (plus minor tweaks).
1133 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1134 This is now consistent with GnuTLS, and is now documented: the
1135 previous undocumented portable approach to treating the option as
1136 unset was to force an expansion failure. That still works, and
1137 an empty string is now equivalent.
1139 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1140 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1141 not performing validation itself.
1143 PP/20 Added force_command boolean option to pipe transport.
1144 Patch from Nick Koston, of cPanel Inc.
1146 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1149 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1151 PP/21 Fix eximon continuous updating with timestamped log-files.
1152 Broken in a format-string cleanup in 4.80, missed when I repaired the
1153 other false fix of the same issue.
1154 Report and fix from Heiko Schlichting.
1157 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1158 Report from Prashanth Katuri.
1160 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1161 It's SecureTransport, so affects any MacOS clients which use the
1162 system-integrated TLS libraries, including email clients.
1164 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1165 using a MIME ACL for non-SMTP local injection.
1166 Report and assistance in diagnosis by Warren Baker.
1168 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1170 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1172 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1173 last id that failed so it may be referenced in subsequent ACL's.
1175 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1178 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1179 ldap library initialization, allowing self-signed CA's to be
1180 used. Also properly sets require_cert option later in code by
1181 using NULL (global ldap config) instead of ldap handle (per
1182 session). Bug diagnosis and testing by alxgomz.
1184 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1185 the src/util/ subdirectory.
1187 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1188 renamed to Transport Post Delivery Action by Jeremy Harris, as
1191 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1192 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1193 redis_servers = needs to be configured which will be used by the redis
1194 lookup. Patch from Warren Baker, of The Packet Hub.
1196 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1198 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1199 hostname or reverse DNS when processing a host list. Used suggestions
1200 from multiple comments on this bug.
1202 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1204 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1205 Missed a few lines, added it to make the runtest require no keyboard
1208 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1209 contains upper case chars. Make router use caseful_local_part.
1211 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1212 support when GnuTLS has been built with p11-kit.
1218 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1220 This, or similar/improved, will also be change PP/11 of 4.82.
1226 PP/01 Handle short writes when writing local log-files.
1227 In practice, only affects FreeBSD (8 onwards).
1228 Bugzilla 1053, with thanks to Dmitry Isaikin.
1230 NM/01 Bugzilla 949 - Documentation tweak
1232 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1235 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1237 PP/02 Implemented gsasl authenticator.
1239 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1241 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1242 `pkg-config foo` for cflags/libs.
1244 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1245 with rest of GSASL and with heimdal_gssapi.
1247 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1248 `pkg-config foo` for cflags/libs for the TLS implementation.
1250 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1251 properties get this fed in as external SSF. A number of robustness
1252 and debugging improvements to the cyrus_sasl authenticator.
1254 PP/08 cyrus_sasl server now expands the server_realm option.
1256 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1257 Patch by Jeremy Harris.
1259 PP/10 Added dbmjz lookup type.
1261 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1263 PP/12 MAIL args handles TAB as well as SP, for better interop with
1264 non-compliant senders.
1265 Analysis and variant patch by Todd Lyons.
1267 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1268 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1269 Patch from Dirk Mueller <dmueller@suse.com>
1271 PP/13 tls_peerdn now print-escaped for spool files.
1272 Observed some $tls_peerdn in wild which contained \n, which resulted
1273 in spool file corruption.
1275 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1276 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1277 or write after TLS renegotiation, which otherwise led to messages
1280 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1281 as a tracking header (ie: a signed header comes before the signature).
1282 Patch from Wolfgang Breyha.
1284 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1285 comma-sep list; embedded commas doubled.
1287 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1289 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1291 Report and patch from Dmitry Banschikov.
1293 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1294 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1295 failures. We appear to now support TLS1.1+ with Exim.
1297 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1298 lets Exim select keys and certificates based upon TLS SNI from client.
1299 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1300 before an outbound SMTP session. New log_selector, +tls_sni.
1302 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1303 NULL dereference. Report and patch from Alun Jones.
1305 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1306 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1307 Not seeing resolver debug output on NetBSD, but suspect this is a
1308 resolver implementation change.
1310 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1311 Left warnings. Added "eximon gdb" invocation mode.
1313 PP/21 Defaulting "accept_8bitmime" to true, not false.
1315 PP/22 Added -bw for inetd wait mode support.
1317 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1318 locate the relevant includes and libraries. Made this the default.
1320 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1321 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1323 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1324 This may cause build issues on older platforms.
1326 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1327 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1328 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1329 Added SNI support via GnuTLS too.
1330 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1332 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1334 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1335 Applied second patch from Janne, implementing suggestion to default
1336 multiple-strings-in-record handling to match SPF spec.
1338 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1340 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1341 read-only, out of scope).
1342 Patch from Wolfgang Breyha, report from Stuart Northfield.
1344 PP/29 Fix three issues highlighted by clang analyser static analysis.
1345 Only crash-plausible issue would require the Cambridge-specific
1346 iplookup router and a misconfiguration.
1347 Report from Marcin Mirosław.
1349 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1351 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1352 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1353 As part of this, removing so much warning spew let me fix some minor
1354 real issues in debug logging.
1356 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1357 assignment on my part. Fixed.
1359 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1360 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1361 Janne Snabb (who went above and beyond: thank you).
1363 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1364 string otherwise requires a connection and a bunch more work and it's
1365 relatively easy to get wrong. Should also expose TLS library linkage
1368 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1369 64-bit ${eval} (JH/03).
1371 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1372 GNU libc to support some of the 64-bit stuff, should not lead to
1373 conflicts. Defined before os.h is pulled in, so if a given platform
1374 needs to override this, it can.
1376 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1377 protection layer was required, which is not implemented.
1378 Bugzilla 1254, patch from Wolfgang Breyha.
1380 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1381 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1382 tls_dhparam take prime identifiers. Also unbreak combination of
1383 OpenSSL+DH_params+TLSSNI.
1385 PP/39 Disable SSLv2 by default in OpenSSL support.
1391 PP/01 Solaris build fix for Oracle's LDAP libraries.
1392 Bugzilla 1109, patch from Stephen Usher.
1394 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1396 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1399 TF/02 Fix a couple more cases where we did not log the error message
1400 when unlink() failed. See also change 4.74-TF/03.
1402 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1403 lock up or crash if it happened to be inside a call to libc when it
1404 got a SIGUSR1 from exiwhat.
1406 The SIGUSR1 handler appends the current process status to the process
1407 log which is later printed by exiwhat. It used to use the general
1408 purpose logging code to do this, but several functions it calls are
1409 not safe for signals.
1411 The new output code in the SIGUSR1 handler is specific to the process
1412 log, and simple enough that it's easy to inspect for signal safety.
1413 Removing some special cases also simplifies the general logging code.
1414 Removing the spurious timestamps from the process log simplifies
1417 TF/04 Improved ratelimit ACL condition.
1419 The /noupdate option has been deprecated in favour of /readonly which
1420 has clearer semantics. The /leaky, /strict, and /readonly update modes
1421 are mutually exclusive. The update mode is no longer included in the
1422 database key; it just determines when the database is updated. (This
1423 means that when you upgrade Exim will forget old rate measurements.)
1425 Exim now checks that the per_* options are used with an update mode that
1426 makes sense for the current ACL. For example, when Exim is processing a
1427 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1428 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1429 must specify per_mail/readonly. If you omit the update mode it defaults to
1430 /leaky where that makes sense (as before) or /readonly where required.
1432 The /noupdate option is now undocumented but still supported for
1433 backwards compatibility. It is equivalent to /readonly except that in
1434 ACLs where /readonly is required you may specify /leaky/noupdate or
1435 /strict/noupdate which are treated the same as /readonly.
1437 A useful new feature is the /count= option. This is a generalization
1438 of the per_byte option, so that you can measure the throughput of other
1439 aggregate values. For example, the per_byte option is now equivalent
1440 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1442 The per_rcpt option has been generalized using the /count= mechanism
1443 (though it's more complicated than the per_byte equivalence). When it is
1444 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1445 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1446 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1447 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1448 Note that using per_rcpt with a non-readonly update mode in more than
1449 one ACL will cause the recipients to be double-counted. (The per_mail
1450 and per_byte options don't have this problem.)
1452 The handling of very low rates has changed slightly. If the computed rate
1453 is less than the event's count (usually one) then this event is the first
1454 after a long gap. In this case the rate is set to the same as this event's
1455 count, so that the first message of a spam run is counted properly.
1457 The major new feature is a mechanism for counting the rate of unique
1458 events. The new per_addr option counts the number of different
1459 recipients that someone has sent messages to in the last time period. It
1460 behaves like per_rcpt if all the recipient addresses are different, but
1461 duplicate recipient addresses do not increase the measured rate. Like
1462 the /count= option this is a general mechanism, so the per_addr option
1463 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1464 example, measure the rate that a client uses different sender addresses
1465 with the options per_mail/unique=$sender_address. There are further
1466 details in the main documentation.
1468 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1470 TF/06 Removed a few PCRE remnants.
1472 TF/07 Automatically extract Exim's version number from tags in the git
1473 repository when doing development or release builds.
1475 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1476 Bugzilla 879. Patch from Paul Fisher.
1478 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1479 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1482 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1484 PP/05 Variable $av_failed, true if the AV scanner deferred.
1485 Bugzilla 1078. Patch from John Horne.
1487 PP/06 Stop make process more reliably on build failure.
1488 Bugzilla 1087. Patch from Heiko Schlittermann.
1490 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1491 Bugzilla 1089. Patch from Heiko Schlittermann.
1493 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1494 Bugzilla 1131. Patch from Holger Weiß.
1496 PP/09 Handle IPv6 addresses with SPF.
1497 Bugzilla 860. Patch from Wolfgang Breyha.
1499 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1501 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1504 PP/11 match_* no longer expand right-hand-side by default.
1505 New compile-time build option, EXPAND_LISTMATCH_RHS.
1506 New expansion conditions, "inlist", "inlisti".
1508 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1510 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1512 PP/14 fix log_write() format string regression from TF/03.
1513 Bugzilla 1152. Patch from Dmitry Isaikin.
1519 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1521 PP/02 Harmonised TLS library version reporting; only show if debugging.
1522 Layout now matches that introduced for other libraries in 4.74 PP/03.
1524 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1526 PP/04 New "dns_use_edns0" global option.
1528 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1531 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1532 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1534 TK/01 Updated PolarSSL code to 0.14.2.
1535 Bugzilla 1097. Patch from Andreas Metzler.
1537 PP/07 Catch divide-by-zero in ${eval:...}.
1538 Fixes bugzilla 1102.
1540 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1543 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1544 format-string attack -- SECURITY: remote arbitrary code execution.
1546 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1547 time unintentionally subject to list matching rules, letting the header
1548 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1549 arbitrary string expansion). This allowed for information disclosure.
1551 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1552 INT_MIN/-1 -- value coerced to INT_MAX.
1558 NM/01 Workaround for PCRE version dependency in version reporting
1561 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1562 This fixes portability to compilers other than gcc, notably
1563 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1565 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1566 makefiles for portability to HP-UX and POSIX correctness.
1568 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1569 Also via indented variable definition in the Makefile.
1570 (Debugging by Oliver Heesakkers).
1572 PP/02 Restore caching of spamd results with expanded spamd_address.
1573 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1575 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1576 Improves build reliability. Fix from: Frank Elsner
1578 NM/02 Fix wide character breakage in the rfc2047 coding
1579 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1581 NM/03 Allow underscore in dnslist lookups
1582 Fixes bug 1026. Patch from Graeme Fowler
1584 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1585 Code patches from Adam Ciarcinski of NetBSD.
1587 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1590 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1591 is logged, to avoid truncation. Patch from John Horne.
1593 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1594 Patch from Jakob Hirsch.
1596 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1597 SQL string expansion failure details.
1598 Patch from Andrey Oktyabrski.
1600 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1601 Patch from Simon Arlott.
1603 PP/09 New lookups functionality failed to compile on old gcc which rejects
1604 extern declarations in function scope.
1605 Patch from Oliver Fleischmann
1607 PP/10 Use sig_atomic_t for flags set from signal handlers.
1608 Check getgroups() return and improve debugging.
1609 Fixed developed for diagnosis in bug 927 (which turned out to be
1612 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1613 Patch from Mark Zealey.
1615 PP/12 Bugzilla 1056: Improved spamd server selection.
1616 Patch from Mark Zealey.
1618 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1619 Based on patch from Heiko Schlittermann.
1621 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1622 Patch from Uwe Doering, sign-off by Michael Haardt.
1624 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1625 variable declaration deep within a block. Bug and patch from
1628 PP/15 lookups-Makefile IRIX compatibility coercion.
1630 PP/16 Make DISABLE_DKIM build knob functional.
1632 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1633 Patch by Simon Arlott
1635 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1636 variable argument macros. Our copy now differs from upstream.
1642 TF/01 Failure to get a lock on a hints database can have serious
1643 consequences so log it to the panic log.
1645 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1646 controlled using the smtp_confirmation log selector.
1648 TF/03 Include the error message when we fail to unlink a spool file.
1650 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1651 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1652 for maintaining out-of-tree patches for some time.
1654 PP/01 Bugzilla 139: Documentation and portability issues.
1655 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1656 Handle per-OS dynamic-module compilation flags.
1658 PP/02 Let /dev/null have normal permissions.
1659 The 4.73 fixes were a little too stringent and complained about the
1660 permissions on /dev/null. Exempt it from some checks.
1661 Reported by Andreas M. Kirchwitz.
1663 PP/03 Report version information for many libraries, including
1664 Exim version information for dynamically loaded libraries. Created
1665 version.h, now support a version extension string for distributors
1666 who patch heavily. Dynamic module ABI change.
1668 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1669 privilege escalation vulnerability whereby the Exim run-time user
1670 can cause root to append content of the attacker's choosing to
1673 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1676 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1677 If dropping privileges for untrusted macros, we disabled normal logging
1678 on the basis that it would fail; for the Exim run-time user, this is not
1679 the case, and it resulted in successful deliveries going unlogged.
1680 Fixed. Reported by Andreas Metzler.
1686 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1687 only prepend for the Resent-* case. Fixes regression introduced in
1688 Exim 4.70 by NM/22 for Bugzilla 607.
1690 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1691 increasing numbers of administrators be bitten by this.
1693 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1695 PP/03 Bugzilla 994: added openssl_options main configuration option.
1697 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1699 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1701 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1703 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1704 without a peer certificate, leading to a segfault because of an
1705 assumption that peers always have certificates. Be a little more
1706 paranoid. Problem reported by Martin Tscholak.
1708 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1709 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1710 NB: ClamAV planning to remove STREAM in "middle of 2010".
1711 CL also introduces -bmalware, various -d+acl logging additions and
1712 more caution in buffer sizes.
1714 PP/09 Implemented reverse_ip expansion operator.
1716 PP/10 Bugzilla 937: provide a "debug" ACL control.
1718 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1720 PP/12 Bugzilla 973: Implement --version.
1722 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1724 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1726 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1728 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1729 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1730 ignore trailing whitespace.
1732 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1734 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1737 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1738 Notification from Dr Andrew Aitchison.
1740 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1741 ExtendedDetectionInfo response format.
1742 Notification from John Horne.
1744 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1747 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1748 XSL and documented dependency on system catalogs, with examples of how
1751 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1754 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1755 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1756 configuration file which is writeable by the Exim user or group.
1758 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1759 of configuration files to cover files specified with the -C option if
1760 they are going to be used with root privileges, not just the default
1763 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1764 option (effectively making it always true).
1766 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1767 files to be used while preserving root privileges.
1769 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1770 that rogue child processes cannot use them.
1772 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1773 run-time user, instead of root.
1775 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1776 Exim run-time user without dropping privileges.
1778 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1779 result string, instead of calling string_vformat() twice with the same
1782 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1783 for other users. Others should always drop root privileges if they use
1784 -C on the command line, even for a whitelisted configure file.
1786 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1788 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1794 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1795 $data_path, and $header_path variables; fixed documentation bugs and
1798 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1799 exipick to access non-standard spools, including the "frozen" queue
1802 NM/01 Bugzilla 965: Support mysql stored procedures.
1803 Patch from Alain Williams
1805 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1807 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1808 Patch from Andreas Metzler
1810 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1811 Patch from Kirill Miazine
1813 NM/05 Bugzilla 671: Added umask to procmail example.
1815 JJ/03 installed exipick 20100323.0, fixing doc bug
1817 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1818 directory. Notification and patch from Dan Rosenberg.
1820 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1822 TK/02 Improve log output when DKIM signing operation fails.
1824 MH/01 Treat the transport option dkim_domain as a colon separated
1825 list, not as a single string, and sign the message with each element,
1826 omitting multiple occurences of the same signer.
1828 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1829 Bugzilla 985, 986. Patch by Simon Arlott
1831 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1832 Patch by Simon Arlott
1834 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1835 MBX locking. Notification from Dan Rosenberg.
1841 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1843 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1845 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1847 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1849 NM/04 Bugzilla 915: Flag broken perl installation during build.
1855 TK/01 Added patch by Johannes Berg that expands the main option
1856 "spamd_address" if it starts with a dollar sign.
1858 TK/02 Write list of recipients to X-Envelope-Sender header when building
1859 the mbox-format spool file for content scanning (suggested by Jakob
1862 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1863 (http://www.dcc-servers.net/) support via dccifd. Activated by
1864 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1866 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1867 by Mark Daniel Reidel <mr@df.eu>.
1869 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1870 When building exim an external PCRE library is now needed -
1871 PCRE is a system library on the majority of modern systems.
1872 See entry on PCRE_LIBS in EDITME file.
1874 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1875 conversation. Added nologin parameter to request.
1876 Patch contributed by Kirill Miazine.
1878 TF/01 Do not log submission mode rewrites if they do not change the address.
1880 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1882 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1883 log files in place. Contributed by Roberto Lima.
1885 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1887 TF/03 Bugzilla 615: When checking the local_parts router precondition
1888 after a local_part_suffix or local_part_prefix option, Exim now
1889 does not use the address's named list lookup cache, since this
1890 contains cached lookups for the whole local part.
1892 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1893 Robert Millan. Documentation is in experimental-spec.txt.
1895 TF/04 Bugzilla 668: Fix parallel build (make -j).
1897 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1899 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1900 Patch provided by Jan Srzednicki.
1902 TF/05 Leading white space used to be stripped from $spam_report which
1903 wrecked the formatting. Now it is preserved.
1905 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1906 that they are available at delivery time.
1908 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1910 TF/08 TLS error reporting now respects the incoming_interface and
1911 incoming_port log selectors.
1913 TF/09 Produce a more useful error message if an SMTP transport's hosts
1914 setting expands to an empty string.
1916 NM/06 Bugzilla 744: EXPN did not work under TLS.
1917 Patch provided by Phil Pennock.
1919 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1920 Patch provided by Richard Godbee.
1922 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1923 acl_smtp_notquit, added index entry.
1925 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1926 Patch provided by Eugene Bujak.
1928 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1929 accept(). Patch provided by Maxim Dounin.
1931 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1932 Patch provided by Phil Pennock.
1934 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1936 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1937 Patch provided by Brad "anomie" Jorsch.
1939 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1940 Patch provided by Dean Brooks.
1942 TK/05 Add native DKIM support (does not depend on external libraries).
1944 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1945 Patch provided by Graeme Fowler.
1947 NM/16 Bugzilla 851: Documentation example syntax fix.
1949 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1951 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1954 NM/19 Bugzilla 745: TLS version reporting.
1955 Patch provided by Phil Pennock.
1957 NM/20 Bugzilla 167: bool: condition support.
1958 Patch provided by Phil Pennock.
1960 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1961 clients. Patch provided by Phil Pennock.
1963 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1964 Patch provided by Brad "anomie" Jorsch.
1966 NM/23 Bugzilla 687: Fix misparses in eximstats.
1967 Patch provided by Heiko Schlittermann.
1969 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1970 Patch provided by Heiko Schlittermann.
1972 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1973 plus update to original patch.
1975 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1977 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1978 Patch provided by David Brownlee.
1980 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1982 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1984 NM/30 Bugzilla 888: TLS documentation bugfixes.
1986 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1988 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1989 Unlike the original bugzilla I have changed all shell scripts in src tree.
1991 NM/33 Bugzilla 898: Transport filter timeout fix.
1992 Patch by Todd Rinaldo.
1994 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1995 Patch by Serge Demonchaux.
1997 NM/35 Bugzilla 39: Base64 decode bug fixes.
1998 Patch by Jakob Hirsch.
2000 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2002 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2004 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2006 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2012 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2013 ALT-N's libdkim that I have put here:
2014 http://duncanthrax.net/exim-experimental/
2016 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2017 were called 'true' and it seems that C99 defines that as a reserved
2018 keyword to be used with 'bool' variable types. That means you could
2019 not include C99-style headers which use bools without triggering
2020 build errors in sieve.c.
2022 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2023 as mailq or other aliases. Changed the --help handling significantly
2024 to do whats expected. exim_usage() emits usage/help information.
2026 SC/01 Added the -bylocaldomain option to eximstats.
2028 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2030 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2032 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2038 PH/01 Another patch from the Sieve maintainer.
2040 PH/02 When an IPv6 address is converted to a string for single-key lookup
2041 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2042 dots are used instead of colons so that keys in lsearch files need not
2043 contain colons. This was done some time before quoting was made available
2044 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2045 (notated using the quote facility) so as to distinguish them from IPv4
2046 keys. This meant that lookups for IP addresses in host lists did not work
2047 for iplsearch lookups.
2049 This has been fixed by arranging for IPv6 addresses to be expressed with
2050 colons if the lookup type is iplsearch. This is not incompatible, because
2051 previously such lookups could never work.
2053 The situation is now rather anomalous, since one *can* have colons in
2054 ordinary lsearch keys. However, making the change in all cases is
2055 incompatible and would probably break a number of configurations.
2057 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2060 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2061 conversion specification without a maximum field width, thereby enabling
2062 a rogue spamd server to cause a buffer overflow. While nobody in their
2063 right mind would setup Exim to query an untrusted spamd server, an
2064 attacker that gains access to a server running spamd could potentially
2065 exploit this vulnerability to run arbitrary code as the Exim user.
2067 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2068 $primary_hostname instead of what libspf2 thinks the hosts name is.
2070 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2071 a directory entry by the name of the lookup key. Previously, if a
2072 symlink pointed to a non-existing file or a file in a directory that
2073 Exim lacked permissions to read, a lookup for a key matching that
2074 symlink would fail. Now it is enough that a matching directory entry
2075 exists, symlink or not. (Bugzilla 503.)
2077 PH/03 The body_linecount and body_zerocount variables are now exported in the
2080 PH/04 Added the $dnslist_matched variable.
2082 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2083 This means they are set thereafter only if the connection becomes
2086 PH/06 Added the client_condition to authenticators so that some can be skipped
2087 by clients under certain conditions.
2089 PH/07 The error message for a badly-placed control=no_multiline_responses left
2090 "_responses" off the end of the name.
2092 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2094 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2095 (without spaces) instead of just copying the configuration text.
2097 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2099 PH/11 Added $max_received_linelength.
2101 PH/12 Added +ignore_defer and +include_defer to host lists.
2103 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2104 way in which PCRE > 7.0 is built.
2106 PH/14 Implemented queue_only_load_latch.
2108 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2109 MAIL command. The effect was to mangle the value on 64-bit systems.
2111 PH/16 Another patch from the Sieve maintainer.
2113 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2115 PH/18 If a system quota error occurred while trying to create the file for
2116 a maildir delivery, the message "Mailbox is full" was not appended to the
2117 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2118 only to a quota excession during the actual writing of the file.
2120 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2121 characters?) which causes problems in log lines. The DN values are now
2122 passed through string_printing() before being added to log lines.
2124 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2125 and InterBase are left for another time.)
2127 PH/21 Added message_body_newlines option.
2129 PH/22 Guard against possible overflow in moan_check_errorcopy().
2131 PH/23 POSIX allows open() to be a macro; guard against that.
2133 PH/24 If the recipient of an error message contained an @ in the local part
2134 (suitably quoted, of course), incorrect values were put in $domain and
2135 $local_part during the evaluation of errors_copy.
2141 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2142 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2145 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2146 issue a MAIL command.
2148 PH/02 In an ACL statement such as
2150 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2152 if a client was not listed at all, or was listed with a value other than
2153 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2154 the condition was not true (as it should be), so access was not denied.
2155 The bug was that the ! inversion was incorrectly passed on to the second
2156 item. This has been fixed.
2158 PH/03 Added additional dnslists conditions == and =& which are different from
2159 = and & when the dns lookup returns more than one IP address.
2161 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2162 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2164 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2165 FSYNC, which compiles an option called disable_fsync that allows for
2166 bypassing fsync(). The documentation is heavily laced with warnings.
2168 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2170 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2171 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2172 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2173 including adding "make clean"; (3) Added -fPIC when compiling the test
2174 dynamically loaded module, to get rid of a warning.
2176 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2177 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2178 = 0s. The bug is otherwise harmless.
2180 PH/07 There was a bug in the dovecot authenticator such that the value of
2181 $auth1 could be overwritten, and so not correctly preserved, after a
2182 successful authentication. This usually meant that the value preserved by
2183 the server_setid option was incorrect.
2185 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2187 PH/09 Installed PCRE release 7.0.
2189 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2190 run for batched SMTP input. It is now run at the start of every message
2191 in the batch. While fixing this I discovered that the process information
2192 (output by running exiwhat) was not always getting set for -bs and -bS
2193 input. This is fixed, and it now also says "batched" for BSMTP.
2195 PH/11 Added control=no_pipelining.
2197 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2198 patch, slightly modified), and move the expansion of helo_data till after
2199 the connection is made in the smtp transport (so it can use these
2202 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2204 PH/14 Added log_selector = +pid.
2206 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2208 PH/16 Add ${if forany and ${if forall.
2210 PH/17 Added dsn_from option to vary the From: line in DSNs.
2212 PH/18 Flush SMTP output before performing a callout, unless control =
2213 no_callout_flush is set.
2215 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2216 was true (the default) a successful delivery failed to delete the retry
2217 item, thus causing premature timeout of the address. The bug is now
2220 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2222 PH/21 Long custom messages for fakedefer and fakereject are now split up
2223 into multiline responses in the same way that messages for "deny" and
2224 other ACL rejections are.
2226 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2227 with slight modification.
2229 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2230 draft, changing the syntax and factoring some duplicate code".
2232 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2233 for deliveries of the second and subsequent messages over the same SMTP
2236 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2237 ${reduce, with only minor "tidies".
2239 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2241 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2242 expansion side effects.
2244 PH/27 When a message times out after an over-quota error from an Exim-imposed
2245 quota, the bounce message says "mailbox is full". This message was not
2246 being given when it was a system quota that was exceeded. It now should
2249 MH/03 Made $recipients available in local_scan(). local_scan() already has
2250 better access to the recipient list through recipients_list[], but
2251 $recipients can be useful in postmaster-provided expansion strings.
2253 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2254 in the case of a MAIL command with additional options following the
2255 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2256 were accidentally chopped off.
2258 PH/29 SMTP synchronization checks are implemented when a command is read -
2259 there is a check that no more input is waiting when there shouldn't be
2260 any. However, for some commands, a delay in an ACL can mean that it is
2261 some time before the response is written. In this time, more input might
2262 arrive, invalidly. So now there are extra checks after an ACL has run for
2263 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2264 pipelining has not been advertised.
2266 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2268 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2269 returned in the SMTP response when smtp_return_error_details was false.
2270 This has been fixed.
2272 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2273 instead of the C I/O that was originally supplied, because problems were
2274 reported on Solaris.
2276 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2277 Exim which did not show up earlier: it was assuming that a call to
2278 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2279 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2280 was a macro that became an assignment, so it seemed to work. This has
2281 changed to a proper function call with a void return, hence the compile
2282 error. Exim's code has been fixed.
2284 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2287 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2289 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2291 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2292 because it turns out to be too big or there is a timeout) there is no
2293 "Completed" line in the log. When some messages of this type were
2294 selected by exigrep, they were listed as "not completed". Others were
2295 picked up by some special patterns. I have improved the selection
2296 criteria to be more general.
2298 PH/38 The host_find_failed option in the manualroute router can now be set
2299 to "ignore", to completely ignore a host whose IP address cannot be
2300 found. If all hosts are ignored, the behaviour is controlled by the new
2301 host_all_ignored option.
2303 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2304 homing or because of multiple MX records with /mx) generated more than
2305 one IP address, and the following item turned out to be the local host,
2306 all the secondary addresses of the first item were incorrectly removed
2307 from the list, along with the local host and any following hosts (which
2308 is what is supposed to happen).
2310 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2311 whoever called Exim into the -H file. In the case of the daemon it was
2312 behaving confusingly. When first started, it used values for whoever
2313 started the daemon, but after a SIGHUP it used the Exim user (because it
2314 calls itself on a restart). I have changed the code so that it now always
2317 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2318 message are rejected with the same error (e.g. no authentication or bad
2319 sender address), and a DATA command is nevertheless sent (as can happen
2320 with PIPELINING or a stupid MUA), the error message that was given to the
2321 RCPT commands is included in the rejection of the DATA command. This is
2322 intended to be helpful for MUAs that show only the final error to their
2325 PH/42 Another patch from the Sieve maintainer.
2327 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2328 Eximstats - Fixed some broken HTML links and added missing column headers
2330 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2331 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2333 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2335 PH/43 Yet another patch from the Sieve maintainer.
2337 PH/44 I found a way to check for a TCP/IP connection going away before sending
2338 the response to the final '.' that terminates a message, but only in the
2339 case where the client has not sent further data following the '.'
2340 (unfortunately, this is allowed). However, in many cases there won't be
2341 any further data because there won't be any more messages to send. A call
2342 to select() can be used: if it shows that the input is "ready", there is
2343 either input waiting, or the socket has been closed. An attempt to read
2344 the next input character can distinguish the two cases. Previously, Exim
2345 would have sent an OK response which the client would never have see.
2346 This could lead to message repetition. This fix should cure that, at
2347 least in a lot of common cases.
2349 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2350 advertised in response to EHLO.
2356 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2357 fixed by 4.65/MH/01 (is this a record?) are fixed:
2359 (i) An empty string was always treated as zero by the numeric comparison
2360 operators. This behaviour has been restored.
2362 (ii) It is documented that the numeric comparison operators always treat
2363 their arguments as decimal numbers. This was broken in that numbers
2364 starting with 0 were being interpreted as octal.
2366 While fixing these problems I realized that there was another issue that
2367 hadn't been noticed. Values of message_size_limit (both the global option
2368 and the transport option) were treated as octal if they started with 0.
2369 The documentation was vague. These values are now always treated as
2370 decimal, and I will make that clear in the documentation.
2376 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2377 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2380 MH/01 Don't check that the operands of numeric comparison operators are
2381 integers when their expansion is in "skipping" mode (fixes bug
2382 introduced by 4.64-PH/07).
2384 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2385 child addresses, Exim now panics and dies. Previously, because the count
2386 is held in a short int, deliveries were likely to be lost. As such a
2387 large number of recipients for a single message is ridiculous
2388 (performance will be very, very poor), I have chosen to impose a limit
2389 rather than extend the field.
2395 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2396 leftover -K file (the existence of which was triggered by #402).
2397 While we were at it, introduced process PID as part of the -K
2398 filename. This should rule out race conditions when creating
2401 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2402 processing considerably. Previous code took too long for large mails,
2403 triggering a timeout which in turn triggers #401.
2405 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2406 in the DK code in transports.c. sendfile() is not really portable,
2407 hence the _LINUX specificness.
2409 TF/01 In the add_headers option to the mail command in an Exim filter,
2410 there was a bug that Exim would claim a syntax error in any
2411 header after the first one which had an odd number of characters
2414 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2415 callout verification, Exim cached a "reject" for the entire domain. This
2416 is correct for most verifications, but it is not correct for a recipient
2417 verification with use_sender or use_postmaster set, because in that case
2418 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2419 case of MAIL FROM:<> rejection from other early rejections (e.g.
2420 rejection of HELO). When verifying a recipient using a non-null MAIL
2421 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2422 Whatever the result of the callout, the value of the domain cache is
2423 left unchanged (for any other kind of callout, getting as far as trying
2424 RCPT means that the domain itself is ok).
2426 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2429 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2430 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2431 session, the daemon ignores ECONNECT errors and logs others; it now
2432 ignores EPIPE as well.
2434 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2435 (quoted-printable decoding).
2437 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2438 later the small subsequent patch to fix an introduced bug.
2440 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2442 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2444 PH/08 An error is now given if message_size_limit is specified negative.
2446 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2447 to be given (somewhat) arbitrary names.
2449 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2452 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2453 miscellaneous code fixes
2455 PH/10 Added the log_reject_target ACL modifier to specify where to log
2458 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2459 hostname. This is wrong, because it relates to the incoming message (and
2460 probably the interface on which it is arriving) and not to the outgoing
2461 callout (which could be using a different interface). This has been
2462 changed to use the value of the helo_data option from the smtp transport
2463 instead - this is what is used when a message is actually being sent. If
2464 there is no remote transport (possible with a router that sets up host
2465 addresses), $smtp_active_hostname is used.
2467 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2468 tweaks were necessary in order to get it to work (see also 21 below):
2469 (a) The code assumed that strncpy() returns a negative number on buffer
2470 overflow, which isn't the case. Replaced with Exim's string_format()
2472 (b) There were several signed/unsigned issues. I just did the minimum
2473 hacking in of casts. There is scope for a larger refactoring.
2474 (c) The code used strcasecmp() which is not a standard C function.
2475 Replaced with Exim's strcmpic() function.
2476 (d) The code set only $1; it now sets $auth1 as well.
2477 (e) A simple test gave the error "authentication client didn't specify
2478 service in request". It would seem that Dovecot has changed its
2479 interface. Fortunately there's a specification; I followed it and
2480 changed what the client sends and it appears to be working now.
2482 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2485 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2486 address A is aliased to B and C, where B exists and C does not. Without
2487 -v the output is "A verified" because verification stops after a
2488 successful redirection if more than one address is generated. However,
2489 with -v the child addresses are also verified. Exim was outputting "A
2490 failed to verify" and then showing the successful verification for C,
2491 with its parentage. It now outputs "B failed to verify", showing B's
2492 parentage before showing the successful verification of C.
2494 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2495 look up a TXT record in a specific list after matching in a combined
2498 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2499 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2500 they consult the DNS. I had assumed they would set it the way they
2501 wanted; and indeed my experiments on Linux seem to show that in some
2502 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2503 To be on the safe side, however, I have now made the interface to
2504 host_find_byname() similar to host_find_bydns(), with an argument
2505 containing the DNS resolver options. The host_find_byname() function now
2506 sets these options at its start, just as host_find_bydns() does. The smtp
2507 transport options dns_qualify_single and dns_search_parents are passed to
2508 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2509 of host_find_byname() use the default settings of RES_DEFNAMES
2510 (qualify_single) but not RES_DNSRCH (search_parents).
2512 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2513 spool_read_header() do less string testing, by means of a preliminary
2514 switch on the second character of optional "-foo" lines. (This is
2515 overdue, caused by the large number of possibilities that now exist.
2516 Originally there were few.) While I was there, I also converted the
2517 str(n)cmp tests so they don't re-test the leading "-" and the first
2518 character, in the hope this might squeeze out yet more improvement.
2520 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2521 flag allowing group syntax was set by the header_syntax check but not
2522 turned off, possible causing trouble later; (2) The flag was not being
2523 set at all for the header_verify test, causing "group"-style headers to
2524 be rejected. I have now set it in this case, and also caused header_
2525 verify to ignore an empty address taken from a group. While doing this, I
2526 came across some other cases where the code for allowing group syntax
2527 while scanning a header line wasn't quite right (mostly, not resetting
2528 the flag correctly in the right place). These bugs could have caused
2529 trouble for malformed header lines. I hope it is now all correct.
2531 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2532 with the "reply" argument non-NULL. The code, however (which originally
2533 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2534 but it didn't always do it. This confused somebody who was copying the
2535 code for some other use. I have removed all the tests.
2537 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2538 feature that was used to support insecure browsers during the U.S. crypto
2539 embargo. It requires special client support, and Exim is probably the
2540 only MTA that supported it -- and would never use it because real RSA is
2541 always available. This code has been removed, because it had the bad
2542 effect of slowing Exim down by computing (never used) parameters for the
2543 RSA_EXPORT functionality.
2545 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2546 authenticator to fail if there's a tab character in the incoming data
2547 (there should never be unless someone is messing about, as it's supposed
2548 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2549 if the connection is using TLS or if the remote IP is the same as the
2550 local IP, and the "valid-client-cert option" if a client certificate has
2553 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2554 authenticators. This can be used for authorization after authentication
2555 succeeds. (In the case of plaintext, it servers for both authentication
2558 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2559 if any retry times were supplied.
2561 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2562 connection, where there is no client IP address to check. In this
2563 situation, the verify now always succeeds.
2565 PH/25 Applied John Jetmore's -Mset patch.
2567 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2569 PH/27 In a string expansion for a processed (not raw) header when multiple
2570 headers of the same name were present, leading whitespace was being
2571 removed from all of them, but trailing whitespace was being removed only
2572 from the last one. Now trailing whitespace is removed from each header
2573 before concatenation. Completely empty headers in a concatenation (as
2574 before) are ignored.
2576 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2577 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2579 PH/29 [Removed. This was a change that I later backed out, and forgot to
2580 correct the ChangeLog entry (that I had efficiently created) before
2581 committing the later change.]
2583 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2584 address errors (4xx response to RCPT) over the same connection as other
2585 messages routed to the same hosts. Such deliveries are always "forced",
2586 so retry times are not inspected. This resulted in far too many retries
2587 for the affected addresses. The effect occurred only when there were more
2588 hosts than the hosts_max_try setting in the smtp transport when it had
2589 the 4xx errors. Those hosts that it had tried were not added to the list
2590 of hosts for which the message was waiting, so if all were tried, there
2591 was no problem. Two fixes have been applied:
2593 (i) If there are any address or message errors in an SMTP delivery, none
2594 of the hosts (tried or untried) are now added to the list of hosts
2595 for which the message is waiting, so the message should not be a
2596 candidate for sending over the same connection that was used for a
2597 successful delivery of some other message. This seems entirely
2598 reasonable: after all the message is NOT "waiting for some host".
2599 This is so "obvious" that I'm not sure why it wasn't done
2600 previously. Hope I haven't missed anything, but it can't do any
2601 harm, as the worst effect is to miss an optimization.
2603 (ii) If, despite (i), such a delivery is accidentally attempted, the
2604 routing retry time is respected, so at least it doesn't keep
2605 hammering the server.
2607 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2608 in ${readsocket because some servers need this prod.
2610 PH/32 Added some extra debug output when updating a wait-xxx database.
2612 PH/33 The hint "could be header name not terminated by colon", which has been
2613 given for certain expansion errors for a long time, was not being given
2614 for the ${if def:h_colon_omitted{... case.
2616 PH/34 The spec says: "With one important exception, whenever a domain list is
2617 being scanned, $domain contains the subject domain." There was at least
2618 one case where this was not true.
2620 PH/35 The error "getsockname() failed: connection reset by peer" was being
2621 written to the panic log as well as the main log, but it isn't really
2622 panic-worthy as it just means the connection died rather early on. I have
2623 removed the panic log writing for the ECONNRESET error when getsockname()
2626 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2627 runs only) independently of the message's sender address. This meant
2628 that, if the 4xx error was in fact related to the sender, a different
2629 message to the same recipient with a different sender could confuse
2630 things. In particular, this can happen when sending to a greylisting
2631 server, but other circumstances could also provoke similar problems.
2632 I have changed the default so that the retry time for these errors is now
2633 based a combination of the sender and recipient addresses. This change
2634 can be overridden by setting address_retry_include_sender=false in the
2637 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2638 remote server are returned as part of bounce messages. This was not
2639 happening for LMTP over a pipe (the lmtp transport), but now it is the
2640 same for both kinds of LMTP.
2642 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2643 in header lines that were in fact CNAMEs. This is no longer the case.
2645 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2646 and queue runs started by the daemon processed all messages. This has
2647 been fixed so that -R and -S can now usefully be given with -q<time>.
2649 PH/40 Import PCRE release 6.7 (fixes some bugs).
2651 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2653 PH/42 Give an error if -q is specified more than once.
2655 PH/43 Renamed the variables $interface_address and $interface_port as
2656 $received_ip_address and $received_port, to make it clear that these
2657 values apply to message reception, and not to the outgoing interface when
2658 a message is delivered. (The old names remain recognized, of course.)
2660 PH/44 There was no timeout on the connect() call when using a Unix domain
2661 socket in the ${readsocket expansion. There now is.
2663 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2664 be meaningful with "accept".
2666 SC/01 Eximstats V1.43
2667 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2669 SC/02 Eximstats V1.44
2670 Use a glob alias rather than an array ref in the generated
2671 parser. This improves both readability and performance.
2673 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2674 Collect SpamAssassin and rejection statistics.
2675 Don't display local sender or destination tables unless
2676 there is data to show.
2677 Added average volumes into the top table text output.
2679 SC/04 Eximstats V1.46
2680 Collect data on the number of addresses (recipients)
2681 as well as the number of messages.
2683 SC/05 Eximstats V1.47
2684 Added 'Message too big' to the list of mail rejection
2685 reasons (thanks to Marco Gaiarin).
2687 SC/06 Eximstats V1.48
2688 Mainlog lines which have GMT offsets and are too short to
2689 have a flag are now skipped.
2691 SC/07 Eximstats V1.49 (Alain Williams)
2692 Added the -emptyok flag.
2694 SC/08 Eximstats V1.50
2695 Fixes for obtaining the IP address from reject messages.
2697 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2698 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2699 whitespace changes from 4.64-PH/27
2701 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2704 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2705 are found, allow negative numbers in numeric criteria)
2707 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2709 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2710 to match changes made in 4.64-PH/43
2712 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2714 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2715 "domain" is actually an IP address, and force a failure. This locks out
2716 those revolvers/nameservers that support "A-for-A" lookups, in
2717 contravention of the specifications.
2719 PH/48 When a host name was looked up from an IP address, and the subsequent
2720 forward lookup of the name timed out, the host name was left in
2721 $sender_host_name, contrary to the specification.
2723 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2724 restricted to single-key lookups, Exim was not diagnosing an error if
2725 * or *@ was used with a query-style lookup.
2727 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2729 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2730 long ago, but noone interested enough thought of it. Let's just say that
2731 the "1.1" means that there are some new functions that weren't there at
2732 some point in the past.
2734 PH/51 Error processing for expansion failure of helo_data from an smtp
2735 transport during callout processing was broken.
2737 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2738 tested/used via the -bh/-bhc/-bs options.
2740 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2741 bug, fixed in subsequent PCRE releases).
2743 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2744 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2746 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2752 SC/01 Use a glob alias rather than an array ref in eximstats generated
2753 parser. This improves both readability and performance.
2755 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2756 Don't display local sender or destination tables in eximstats unless
2757 there is data to show.
2758 Added average volumes into the eximstats top table text output.
2760 SC/03 Collect data on the number of addresses (recipients) as well
2761 as the number of messages in eximstats.
2763 TF/01 Correct an error in the documentation for the redirect router. Exim
2764 does (usually) call initgroups() when daemonizing.
2766 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2767 with consistent privilege compared to when running as a daemon.
2769 TF/03 Note in the spec that $authenticated_id is not set for local
2770 submissions from trusted users.
2772 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2773 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2775 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2776 by adding some example configuration directives to the default
2777 configuration file. A little bit of work is required to uncomment the
2778 directives and define how usernames and passwords are checked, but
2779 there is now a framework to start from.
2781 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2782 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2783 without this. I don't know how relevant this is to other LDAP libraries.
2785 PH/02 Add the verb name to the "unknown ACL verb" error.
2787 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2789 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2791 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2792 directory not expanded when it should be if an expanded home directory
2793 was set for the address (which is overridden by the transport).
2795 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2798 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2799 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2800 because it is too late at that time, and has no effect.
2802 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2803 security issue with \' (bugzilla #107). I could not use the
2804 PQescapeStringConn() function, because it needs a PGconn value as one of
2807 PH/08 When testing addresses using -bt, indicate those final addresses that
2808 are duplicates that would not cause an additional delivery. At least one
2809 person was confused, thinking that -bt output corresponded to deliveries.
2810 (Suppressing duplicates isn't a good idea as you lose the information
2811 about possibly different redirections that led to the duplicates.)
2813 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2814 systems where poll() doesn't work, in particular OS X.
2816 PH/10 Added more information to debugging output for retry time not reached.
2818 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2819 operations in malware.c.
2821 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2824 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2825 syslog_duplication set false, log lines that would normally be written
2826 both the the main log and to the reject log were not written to syslog at
2829 PH/14 In the default configuration, change the use of "message" in ACL warn
2830 statements to "add_header".
2832 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2833 not followed by a command (e.g. "seen endif").
2835 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2836 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2839 PH/17 Added extra conditions to the default value of delay_warning_condition
2843 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2844 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2845 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2848 The Auto-Submitted: and various List- headers are standardised, whereas I
2849 don't think Precedence: ever was.
2851 PH/18 Refactored debugging code in route_finduser() to show more information,
2852 in particular, the error code if getpwnam() issues one.
2854 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2855 This is apparently needed in addition to the PH/07 change above to avoid
2856 any possible encoding problems.
2858 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2859 but not after initializing Perl.
2861 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2862 output them only if debugging. By default they are written stderr,
2863 apparently, which is not desirable.
2865 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2868 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2871 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2873 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2874 authenticated or an ident call has been made. Suppress the default
2875 values for $authenticated_id and $authenticated_sender (but permit -oMai
2876 and -oMas) when testing with -bh.
2878 PH/24 Re-jigged the order of the tests in the default configuration so that the
2879 tests for valid domains and recipients precede the DNS black list and CSA
2880 tests, on the grounds that those ones are more expensive.
2882 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2883 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2884 This bug exists in every version of Exim that I still have, right back to
2887 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2888 However, an attempt to turn on case-sensitivity in a regex key by
2889 including (?-i) didn't work because the subject string was already
2890 lowercased, and the effects were non-intuitive. It turns out that a
2891 one-line patch can be used to allow (?-i) to work as expected.
2897 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2898 other effects) broke the use of negated acl sub-conditions.
2900 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2903 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2904 "Deny" causes Exim to reject the incoming connection with a 554 error.
2905 Unfortunately, if there is a major crisis, such as a disk failure,
2906 tcp-wrappers gives "deny", whereas what one would like would be some
2907 kind of temporary error. A kludge has been added to help with this.
2908 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2909 554 error is used if errno is still zero or contains ENOENT (which occurs
2910 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2913 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2915 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2916 errors. Otherwise a message that provokes a temporary error (when other
2917 messages do not) can cause a whole host to time out.
2919 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2920 addresses were routed directly to files or pipes from a redirect router.
2921 File deliveries just didn't batch; pipe deliveries might have suffered
2924 PH/06 A failure to get a lock for a hints database would erroneously always say
2925 "Failed to get write lock", even when it was really a read lock.
2927 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2928 of 0600. This has been changed to use the value of the lockfile_mode
2929 option (which defaults to 0600).
2931 PH/08 Applied small patch from the Sieve maintainer.
2933 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2934 folder from quota calculations, a direct delivery into this folder messed
2935 up the contents of the maildirsize file. This was because the regex was
2936 used only to exclude .Trash (or whatever) when the size of the mailbox
2937 was calculated. There was no check that a delivery was happening into an
2938 excluded directory. This bug has been fixed by ignoring all quota
2939 processing for deliveries into excluded directories.
2941 PH/10 Added the maildirfolder_create_regex option to appendfile.
2947 PH/01 The code for finding all the local interface addresses on a FreeBSD
2948 system running IPv6 was broken. This may well have applied to all BSD
2949 systems, as well as to others that have similar system calls. The broken
2950 code found IPv4 interfaces correctly, but gave incorrect values for the
2951 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2952 that it would not match correctly against @[] and not recognize the IPv6
2955 PH/02 The ipliteral router was not recognizing addresses of the form user@
2956 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2958 PH/03 Added disable_ipv6.
2960 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2961 decoded form, because it is most often used to construct To: headers
2962 lines in autoreplies, and the decoded form may well be syntactically
2963 invalid. However, $reply_address has leading white space removed, and all
2964 newlines turned into spaces so that the autoreply transport does not
2967 PH/05 If group was specified without a user on a router, and no group or user
2968 was specified on a transport, the group from the router was ignored.
2970 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2971 for visible compile-time settings that can be used to change these
2972 numbers, for those that want even more. Backwards compatibility with old
2973 spool files has been maintained. However, going back to a previous Exim
2974 release will lost any variables that are in spool files.
2976 PH/07 Two small changes when running in the test harness: increase delay when
2977 passing a TCP/IP connection to a new process, in case the original
2978 process has to generate a bounce, and remove special handling of
2979 127.0.0.2 (sic), which is no longer necessary.
2981 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2982 be the same on different OS.
2984 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2987 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2988 whether --show-vars was specified or not
2990 JJ/02 exipick: Added support for new ACL variable spool format introduced
2993 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2994 syntactically invalid From: or Reply-to: line, and a filter used this to
2995 generate an autoreply, and therefore failed to obtain an address for the
2996 autoreply, Exim could try to deliver to a non-existent relative file
2997 name, causing unrelated and misleading errors. What now happens is that
2998 it logs this as a hard delivery error, but does not attempt to create a
3001 PH/11 The exinext utility has a -C option for testing purposes, but although
3002 the given file was scanned by exinext itself; it wasn't being passed on
3003 when Exim was called.
3005 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3006 an end-of-file indication when reading a command response.
3008 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3009 compiled. In many other places in Exim, IPv6 addresses are always
3010 recognized, so I have changed this. It also means that IPv4 domain
3011 literals of the form [IPV4:n.n.n.n] are now always recognized.
3013 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3014 used if the router is not running as root, for example, when verifying at
3015 ACL time, or when using -bh. The debugging output from this situation was
3016 non-existent - all you got was a failure to exec. I have made two
3019 (a) Failures to set uid/gid, the current directory, or a process leader
3020 in a subprocess such as that created by queryprogram now generate
3021 suitable debugging output when -d is set.
3023 (b) The queryprogram router detects when it is not running as root,
3024 outputs suitable debugging information if -d is set, and then runs
3025 the subprocess without attempting to change uid/gid.
3027 PH/15 Minor change to Makefile for building test_host (undocumented testing
3030 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3031 additional section of a DNS packet that returns MX or SRV records.
3032 Instead, it always explicitly searches for A/AAAA records. This avoids
3033 major problems that occur when a DNS server includes only records of one
3034 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3035 fixed another bug: if SRV records were looked up and the corresponding
3036 address records were *not* found in the additional section, the port
3037 values from the SRV records were lost.
3039 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3040 using the correct key (the original address) when searching the retry
3041 rules in order to find which one to use for generating the retry hint.
3043 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3044 adding the default one. Similarly, if it contains a Reply-To: header, the
3045 errors_reply_to option, if set, is not used.
3047 PH/19 When calculating a retry time, Exim used to measure the "time since
3048 failure" by looking at the "first failed" field in the retry record. Now
3049 it does not use this if it is later than than the arrival time of the
3050 message. Instead it uses the arrival time. This makes for better
3051 behaviour in cases where some deliveries succeed, thus re-setting the
3052 "first failed" field. An example is a quota failure for a huge message
3053 when small messages continue to be delivered. Without this change, the
3054 "time since failure" will always be short, possible causing more frequent
3055 delivery attempts for the huge message than are intended.
3056 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3058 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3059 $1, $2, $3) because the numerical variables can be reset during some
3060 expansion items (e.g. "match"), thereby losing the authentication data.
3062 PH/21 Make -bV show the size of off_t variables so that the test suite can
3063 decide whether to run tests for quotas > 2G.
3065 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3066 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3067 filecount value is greater than 2G or if a quota value is greater than 2G
3068 on a system where the size of off_t is not greater than 4, a panic error
3071 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3072 never match. The debug and -bh output now contains an explicit error
3073 message indicating a malformed IPv4 address or mask.
3075 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3076 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3077 PH/23 above applies.
3079 PH/25 Do not write to syslog when running in the test harness. The only
3080 occasion when this arises is a failure to open the main or panic logs
3081 (for which there is an explicit test).
3083 PH/26 Added the /no_tell option to "control=freeze".
3085 PH/27 If a host name lookup failed very early in a connection, for example, if
3086 the IP address matched host_lookup and the reverse lookup yielded a name
3087 that did not have a forward lookup, an error message of the form "no IP
3088 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3089 could be logged. Now it outputs the IP address instead of "NULL".
3091 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3092 allows the sender and the authenticated sender to be set when
3093 submitting a message from within Exim. Since child_open_exim() is
3094 documented for local_scan(), the new function should be too.
3096 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3097 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3098 results in an empty string is now treated as unset.
3100 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3102 PH/31 Added sender_verify_fail logging option.
3104 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3105 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3106 tidied the source and removed it altogether.
3108 PH/33 When a queue run was abandoned because the load average was too high, a
3109 log line was always written; now it is written only if the queue_run log
3110 selector is set. In addition, the log line for abandonment now contains
3111 information about the queue run such as the pid. This is always present
3112 in "start" and "stop" lines but was omitted from the "abandon" line.
3114 PH/34 Omit spaces between a header name and the colon in the error message that
3115 is given when verify = headers_syntax fails (if there are lots of them,
3116 the message gets confusing).
3118 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3119 names, as there are now some PTR records that contain slashes. This check
3120 is only to protect against broken name servers that fall over on strange
3121 characters, so the fact that it applies to all lookups doesn't matter.
3123 PH/36 Now that the new test suite is complete, we can remove some of the
3124 special code in Exim that was needed for the old test suite. For example,
3125 sorting DNS records because real resolvers return them in an arbitrary
3126 order. The new test suite's fake resolver always returns records in the
3129 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3130 bounces) except when queue_only is set, to avoid logging races between
3131 the different processes.
3133 PH/38 Panic-die if .include specifies a non-absolute path.
3135 PH/39 A tweak to the "H" retry rule from its user.
3137 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3138 a label. They prevented compilation on older perls.
3140 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3141 a warning to be raised on newish perls.
3143 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3144 on queue. Changes to match documented behaviour of showing count of
3145 messages matching specified criteria.
3147 PH/40 Changed the default ident timeout from 30s to 5s.
3149 PH/41 Added support for the use of login_cap features, on those BSD systems
3150 that have them, for controlling the resources used by pipe deliveries.
3152 PH/42 The content-scanning code uses fopen() to create files in which to put
3153 message data. Previously it was not paying any attention to the mode of
3154 the files. Exim runs with umask(0) because the rest of the code creates
3155 files with open(), and sets the required mode explicitly. Thus, these
3156 files were ending up world-writeable. This was not a big issue, because,
3157 being within the spool directory, they were not world-accessible. I have
3158 created a function called modefopen, which takes an additional mode
3159 argument. It sets umask(777), creates the file, chmods it to the required
3160 mode, then resets the umask. All the relevant calls to fopen() in the
3161 content scanning code have been changed to use this function.
3163 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3164 to 24 hours. This avoids potential overflow problems when processing G
3165 and H retry rules. I suspect nobody ever tinkers with this value.
3167 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3169 PH/45 When the plaintext authenticator is running as a client, the server's
3170 challenges are checked to ensure they are valid base64 strings. By
3171 default, the authentication attempt is cancelled if an invalid string is
3172 received. Setting client_ignore_invalid_base64 true ignores these errors.
3173 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3174 they are received. Thus, the responses can be made to depend on the
3175 challenges. If an invalid string is ignored, an empty string is placed in
3178 PH/46 Messages that are created by the autoreply transport now contains a
3179 References: header, in accordance with RFCs 2822 and 3834.
3181 PH/47 Added authenticated_sender_force to the smtp transport.
3183 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3185 PH/49 Installed latest patch from the Sieve maintainer.
3187 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3188 was also set, the appendfile transport was unnecessarily scanning a
3189 directory of message files (e.g. for maildir delivery) to find the count
3190 of files (along with the size), even though it did not need this
3191 information. It now does the scan only if it needs to find either the
3192 size of the count of files.
3194 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3196 PH/52 Two bugs concerned with error handling when the smtp transport is
3199 (i) Exim was not creating retry information for temporary errors given
3200 for individual recipients after the DATA command when the smtp transport
3201 was used in LMTP mode. This meant that they could be retried too
3202 frequently, and not timed out correctly.
3204 (ii) Exim was setting the flag that allows error details to be returned
3205 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3206 recipients that were returned after the DATA command.
3208 PH/53 This is related to PH/52, but is more general: for any failing address,
3209 when detailed error information was permitted to be returned to the
3210 sender, but the error was temporary, then after the final timeout, only
3211 "retry timeout exceeded" was returned. Now it returns the full error as
3212 well as "retry timeout exceeded".
3214 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3215 do this, and (what is worse) MTAs that accept it.
3217 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3218 will now be deprecated.
3220 PH/56 New os.c-cygwin from the Cygwin maintainer.
3222 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3223 formats (previously only available in exim formats via -bpr, -bpru,
3224 and -bpra. Now also available in native and exiqgrep formats)
3226 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3227 with very large, slow to parse queues
3229 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3231 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3233 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3234 responses to authentication challenges, though it was showing the
3235 challenges; (ii) I've removed the CR characters from the debug output for
3238 PH/58 Allow for the insertion of a newline as well as a space when a string
3239 is turned into more than one encoded-word during RFC 2047 encoding. The
3240 Sieve code now uses this.
3242 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3243 data_4xx, lost_connection, tls_required.
3245 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3246 message was being sent as an SMTP response.
3248 PH/61 Add -l and -k options to exicyclog.
3250 PH/62 When verifying, if an address was redirected to one new address, so that
3251 verification continued, and the new address failed or deferred after
3252 having set something in $address_data, the value of $address_data was not
3253 passed back to the ACL. This was different to the case when no
3254 redirection occurred. The value is now passed back in both cases.
3256 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3257 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3258 use login_cap.h, so on its own it isn't the distinguishing feature. The
3259 new name refers directly to the setclassresources() function.
3261 PH/65 Added configuration files for NetBSD3.
3263 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3265 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3266 is preferred over IPv4.
3268 PH/68 The bounce_return_message and bounce_return_body options were not being
3269 honoured for bounces generated during the reception of non-SMTP messages.
3270 In particular, this applied to messages rejected by the ACL. This bug has
3271 been fixed. However, if bounce_return_message is true and bounce_return_
3272 body is false, the headers that are returned for a non-SMTP message
3273 include only those that have been read before the error was detected.
3274 (In the case of an ACL rejection, they have all been read.)
3276 PH/69 The HTML version of the specification is now built in a directory called
3277 spec_html instead of spec.html, because the latter looks like a path with
3278 a MIME-type, and this confuses some software.
3280 PH/70 Catch two compiler warnings in sieve.c.
3282 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3283 function verify_get_ident() calls ip_connect() to connect a socket, but
3284 if the "connect()" function timed out, ip_connect() used to close the
3285 socket. However, verify_get_ident() also closes the socket later, and in
3286 between Exim writes to the log, which may get opened at this point. When
3287 the socket was closed in ip_connect(), the log could get the same file
3288 descriptor number as the socket. This naturally causes chaos. The fix is
3289 not to close the socket in ip_connect(); the socket should be closed by
3290 the function that creates it. There was only one place in the code where
3291 this was missing, in the iplookup router, which I don't think anybody now
3292 uses, but I've fixed it anyway.
3294 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3295 well as to direct DNS lookups. Otherwise the handling of names in host
3296 lists is inconsistent and therefore confusing.
3302 PH/01 Two changes to the default runtime configuration:
3304 (1) Move the checks for relay_from_hosts and authenticated clients from
3305 after to before the (commented out) DNS black list checks.
3307 (2) Add control=submission to the relay_from_hosts and authenticated
3308 clients checks, on the grounds that messages accepted by these
3309 statements are most likely to be submissions.
3311 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3313 (1) Generate an error if the third argument for the ${prvs expansion is
3316 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3319 (3) Reset the variables that are obtained from the first argument of
3320 ${prvscheck and used in the second argument before leaving the code,
3321 because their memory is reclaimed, so using them afterwards may do
3324 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3325 one (it's much easier than Tom thought :-).
3327 (5) Because of (4), we can now allow for the use of $prvscheck_result
3328 inside the third argument.
3330 PH/03 For some reason, the default setting of PATH when running a command from
3331 a pipe transport was just "/usr/bin". I have changed it to
3334 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3335 anything to be listed in the output from -bV.
3337 PH/05 When a filter generated an autoreply, the entire To: header line was
3338 quoted in the delivery log line, like this:
3340 => >A.N.Other <ano@some.domain> <original@ddress> ...
3342 This has been changed so that it extracts the operative address. There
3343 may be more than one such address. If so, they are comma-separated, like
3346 => >ano@some.domain,ona@other.domain <original@ddress> ...
3348 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3349 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3350 not being looked up in the rDNS to get a host name, Exim was showing the
3351 IP address twice in Received: lines, even though the IP addresses were
3352 identical. For example:
3354 Received: from [1.2.3.4] (helo=[1.2.3.4])
3356 However, if the real host name was known, it was omitting the HELO data
3357 if it matched the actual IP address. This has been tidied up so that it
3358 doesn't show the same IP address twice.
3360 PH/07 When both +timestamp and +memory debugging was on, the value given by
3361 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3362 called by the debug printing, thereby overwriting the timestamp buffer.
3363 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3365 PH/08 When the original message was included in an autoreply transport, it
3366 always said "this is a copy of the message, including all the headers",
3367 even if body_only or headers_only was set. It now gives an appropriate
3370 PH/09 Applied a patch from the Sieve maintainer which:
3372 o fixes some comments
3373 o adds the (disabled) notify extension core
3374 o adds some debug output for the result of if/elsif tests
3375 o points to the current vacation draft in the documentation
3376 and documents the missing references header update
3380 o fixes a bug in processing the envelope test (when testing
3381 multiple envelope elements, the last element determined the
3384 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3385 Electronic Mail") by including:
3387 Auto-submitted: auto-generated
3389 in the messages that it generates (bounce messages and others, such as
3390 warnings). In the case of bounce messages for non-SMTP messages, there was
3391 also a typo: it was using "Auto_submitted" (underscore instead of
3392 hyphen). Since every message generated by Exim is necessarily in response
3393 to another message, thes have all been changed to:
3395 Auto-Submitted: auto-replied
3397 in accordance with these statements in the RFC:
3399 The auto-replied keyword:
3401 - SHOULD be used on messages sent in direct response to another
3402 message by an automatic process,
3404 - MUST NOT be used on manually-generated messages,
3406 - MAY be used on Delivery Status Notifications (DSNs) and Message
3407 Disposition Notifications (MDNs),
3409 - MUST NOT be used on messages generated by automatic or periodic
3410 processes, except for messages which are automatic responses to
3413 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3414 to the default Received: header definition.
3416 PH/12 Added log selector acl_warn_skipped (default on).
3418 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3419 variables because (a) they are in the wrong storage pool and (b) even if
3420 they were copied, it wouldn't work properly because of the caching.
3422 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3423 checking when decoding. Apparently there are clients that generate
3424 overlong encoded strings. Why am I not surprised?
3426 PH/15 If the first argument of "${if match_address" was not empty, but did not
3427 contain an "@" character, Exim crashed. Now it writes a panic log message
3428 and treats the condition as false.
3430 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3432 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3433 extension "envelope-auth". The code is finished and in agreement with
3434 other implementations, but there is no documentation so far and in fact,
3435 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3436 not changing the active code.
3438 Print executed "if" and "elsif" statements when debugging is used. This
3439 helps a great deal to understand what a filter does.
3441 Document more things not specified clearly in RFC3028. I had all this
3442 sorted out, when out of a sudden new issues came to my mind. Oops."
3444 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3447 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3448 canonical form (as documented). However, after a host name lookup from
3449 the IP address, check_host() was doing a simple string comparison with
3450 addresses acquired from the DNS when checking that the found name did
3451 have the original IP as one of its addresses. Since any found IPv6
3452 addresses are likely to be in abbreviated form, the comparison could
3453 fail. Luckily, there already exists a function for doing the comparison
3454 by converting both addresses to binary, so now that is used instead of
3455 the text comparison.
3457 PH/20 There was another similar case to PH/19, when a complete host name was
3458 given in a host list; looking up its IP address could give an abbreviated
3459 form, whereas the current host's name might or might not be abbreviated.
3460 The same fix has been applied.
3466 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3467 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3470 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3471 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3473 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3475 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3476 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3477 Also, for "Auto-Submitted", treat anything other than "no" as
3478 non-personal, in accordance with RFC 3834. (Previously it treated
3479 anything starting "auto-" as non-personal.)
3481 TF/01 The control=submission/name=... option had a problem with syntax
3482 errors if the name included a slash character. The /name= option
3483 now slurps the rest of the string, so it can include any characters
3484 but it must come last in the list of options (after /sender_retain
3487 PH/05 Some modifications to the interface to the fake nameserver for the new
3495 TK/01 Added the "success_on_redirect" address verification option. See
3496 NewStuff for rationale and an example.
3498 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3500 PH/02 Patch to exigrep to allow it to work on syslog lines.
3502 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3503 fread() to skip over the body file's header line, because in Cygwin the
3504 header line is locked and is inaccessible.
3506 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3507 co-exist for some time) to make it clear that it is the Exim ID that is
3508 referenced, not the Message-ID: header line.
3510 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3511 string_format() function, because snprintf() does not exist on all
3514 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3515 ${stat: expansion item.
3517 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3518 protocol synchronization error", to keep the pedants happy.
3520 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3521 well as for IRIX systems, when gcc is being used. See the host.c source
3524 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3526 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3529 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3530 transport and to the smtp transport in LMTP mode.
3532 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3534 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3535 run a filter in a subprocess. This could lead to confusion in subsequent
3536 lookups in the parent process. There should also be a search_tidyup() at
3537 the end of the subprocess.
3539 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3540 only if the host matched helo_try_verify_hosts, which caused the
3541 verification to occur when the EHLO/HELO command was issued. The ACL just
3542 tested the remembered result. Now, if a previous verification attempt has
3543 not happened, "verify = helo" does it there and then.
3545 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3547 TK/03 Fix log output including CR from clamd.
3549 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3550 exist provoked a memory error which could cause a segfault.
3552 PH/15 Installed PCRE 6.2
3554 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3556 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3557 of the problem. Specifically, suggested +O2 rather than +O1 for the
3560 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3562 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3563 record, the port was not correctly logged when the outgoing_port log
3564 selector was set (it logged the transort's default port).
3566 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3567 fallback_hosts, and "hosts" in the smtp transport.
3569 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3570 host errors such as "Connection refused".
3572 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3573 authentication with radiusclient 0.4.9:
3575 - Error returned from rc_read_config was caught wrongly
3576 - Username/password not passed on to radius server due to wrong length.
3578 The presumption is that some radiusclient API changes for 4.51/PH/17
3579 were not taken care of correctly. The code is still untested by me (my
3580 Linux distribution still has 0.3.2 of radiusclient), but it was
3581 contributed by a Radius user.
3583 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3584 expanding the "port" option of the smtp transport.
3586 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3587 while reading a MIME header. Thanks to Tom Hughes for a patch.
3589 PH/24 Include config.h inside local_scan.h so that configuration settings are
3592 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3593 that in an ACL for RCPT (for example), you can examine exactly what was
3596 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3597 commands, but it was not correctly comparing the address with the actual
3598 client host address. Thus, it would show the EHLO address in Received:
3599 header lines when this was not necessary.
3601 PH/27 Added the % operator to ${eval:}.
3603 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3604 it should be ignoring failures (because with -C, for example, it has lost
3605 privilege). It wasn't ignoring creation failures other than "already
3608 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3611 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3612 because an input line was too long, either on its own, or by virtue of
3613 too many continuations, the temporary file was not being removed, and the
3614 return code was incorrect.
3616 PH/31 Missing "BOOL" in function definition in filtertest.c.
3618 PH/32 Applied Sieve patches from the maintainer.
3620 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3622 PH/33 Added "verify = not_blind".
3624 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3625 Local/Makefile (with some defaults set). These are used in built scripts
3626 such as exicyclog, but they have never been used in the exim_install
3627 script (though there are many overriding facilities there). I have
3628 arranged that the exim_install script now takes note of these two
3631 PH/35 Installed configuration files for Dragonfly.
3633 PH/36 When a locally submitted message by a trusted user did not contain a
3634 From: header, and the sender address was obtained from -f or from an SMTP
3635 MAIL command, and the trusted user did not use -F to supply a sender
3636 name, $originator_name was incorrectly used when constructing a From:
3637 header. Furthermore, $originator_name was used for submission mode
3638 messages from external hosts without From: headers in a similar way,
3639 which is clearly wrong.
3641 PH/37 Added control=suppress_local_fixups.
3643 PH/38 When log_selector = +received_sender was set, and the addition of the
3644 sender made the log line's construction buffer exactly full, or one byte
3645 less than full, an overflow happened when the terminating "\n" was
3648 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3649 when the result of a list match is failure because a DNS lookup failed.
3651 PH/40 RM_COMMAND is now used in the building process.
3653 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3654 the "build-* directories that it finds.
3656 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3657 address in a domain literal was a prefix of an interface address.
3659 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3660 when verifying a sender address, unless rewrite_headers is false.
3662 PH/44 Wrote a long comment about why errors_to addresses are verified as
3663 recipients, not senders.
3665 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3666 the ratelimit ACL was added.
3668 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3670 PH/46 Added extra information about PostgreSQL errors to the error string.
3672 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3673 avoiding the need to install special zones in a real server. This is
3674 backwards compatible; if it can't find the fake resolver, it drops back.
3675 Thus, both old and new test suites can be run.
3677 TF/02 Added util/ratelimit.pl
3679 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3680 clock is set back in time.
3682 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3683 Candler <B.Candler@pobox.com>.
3685 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3686 OK for addresses that are the result of redirections.
3688 PH/48 A number of further additions for the benefit of the new test suite,
3689 including a fake gethostbyname() that interfaces to the fake DNS resolver
3692 TF/06 The fix for widen_domains has also been applied to qualify_single and
3693 search_parents which are the other dnslookup options that can cause
3696 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3699 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3701 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3702 service" if it encountered an MX record with an empty target hostname.
3703 The message is now "an MX or SRV record indicated no SMTP service".
3705 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3706 if the DNS of the sending site is misconfigured. This is quite a
3707 common situation. This change restores the behaviour of treating a
3708 helo verification defer as a failure.
3710 PH/51 If self=fail was set on a router, the bounce message did not include the
3711 actual error message.
3717 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3719 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3720 command itself ended in error, the underlying message about the transport
3721 filter timeout was being overwritten with the pipe command error. Now the
3722 underlying error message should be appended to the second error message.
3724 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3726 PH/02 Reduce the amount of output that "make" produces by default. Full output
3727 can still be requested.
3729 PH/03 The warning log line about a condition test deferring for a "warn" verb
3730 was being output only once per connection, rather than after each
3731 occurrence (because it was using the same function as for successful
3732 "warn" verbs). This seems wrong, so I have changed it.
3734 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3735 it should not have, which might have caused a crash in the right
3736 circumstances, but probably never did.
3738 PH/04 Installed a modified version of Tony Finch's patch to make submission
3739 mode fix the return path as well as the Sender: header line, and to
3740 add a /name= option so that you can make the user's friendly name appear
3743 TF/03 Added the control = fakedefer ACL modifier.
3745 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3746 Mark Lowes for thorough testing.
3748 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3750 TK/03 Merged latest SRS patch from Miles Wilton.
3752 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3753 with the definition in sysexits.h (which is #included earlier).
3754 Fortunately, Exim does not actually use EX_OK. The code used to try to
3755 preserve the sysexits.h value, by assuming that macro definitions were
3756 scanned for macro replacements. I have been disabused of this notion,
3757 so now the code just undefines EX_OK before #including unistd.h.
3759 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3760 in the smtp transport. When a block could not be written in a single
3761 write() function, the timeout was being re-applied to each part-write.
3762 This seems wrong - if the receiver was accepting one byte at a time it
3763 would take for ever. The timeout is now adjusted when this happens. It
3764 doesn't have to be particularly precise.
3766 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3767 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3769 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3770 without a domain if the check to <postmaster@domain> fails.
3772 SC/01 Eximstats: added -xls and the ability to specify output files
3773 (patch written by Frank Heydlauf).
3775 SC/02 Eximstats: use FileHandles for outputting results.
3777 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3779 SC/04 Eximstats: fixed display of large numbers with -nvr option
3781 SC/05 Eximstats: fixed merging of reports with empty tables.
3783 SC/06 Eximstats: added the -include_original_destination flag
3785 SC/07 Eximstats: removed tabs and trailing whitespace.
3787 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3789 TK/06 MBOX spool code: Add real "From " MBOX separator line
3790 so the .eml file is really in mbox format (even though
3791 most programs do not really care). Patch from Alex Miller.
3793 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3794 The latter is generated from $received_to and is only set if the
3795 message has one envelope recipient. SA can use these headers,
3796 obviously out-of-the-box. Patch from Alex Miller.
3798 PH/08 The ${def test on a variable was returning false if the variable's
3799 value was "0", contrary to what the specification has always said!
3800 The result should be true unless the variable is empty.
3802 PH/09 The syntax error of a character other than { following "${if
3803 def:variable_name" (after optional whitespace) was not being diagnosed.
3804 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3805 accidental colon was present, for example, could give incorrect results.
3807 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3808 result is used (not including appendfile, where other changes are about
3811 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3812 This involved changing a lot of size variables from int to off_t. It
3813 should work with maildirs and everything.
3815 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3816 spamd dying while we are connected to it.
3818 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3821 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3822 function for BDB 4.3.
3824 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3826 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3827 the sources for PCRE have been re-arranged and more files are now
3830 PH/15 The code I had for printing potentially long long variables in PH/11
3831 above was not the best (it lost precision). The length of off_t variables
3832 is now inspected at build time, and an appropriate printing format (%ld
3833 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3834 to be "long long int" or "long int". This is needed for the internal
3835 formatting function string_vformat().
3837 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3838 the configuration file to be ":syslog", then the script "guesses" where
3839 the logs files are, rather than using the compiled in default. In our
3840 case the guess is not the same as the compiled default, so the script
3841 suddenly stopped working when I started to use syslog. The patch checks
3842 to see if log_file_path is "". If so, it attempts to read it from exim
3843 with no configuration file to get the compiled in version, before it
3844 falls back to the previous guessing code."
3846 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3847 implementing BATV in an Exim configuration. See NewStuff for the gory
3850 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3851 Makefile that are specific to HP-UX.
3853 PH/18 If the "use_postmaster" option was set for a recipient callout together
3854 with the "random" option, the postmaster address was used as the MAIL
3855 FROM address for the random test, but not for the subsequent recipient
3856 test. It is now used for both.
3858 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3859 patch removes a few documentation additions to RFC 3028, because the
3860 latest draft now contains them. It adds the new en;ascii-case comparator
3861 and a new error check for 8bit text in MIME parts. Comparator and
3862 require names are now matched exactly. I enabled the subaddress
3863 extension, but it is not well tested yet (read: it works for me)."
3865 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3866 rework some of the code of TK/09 above to avoid the hardwired use of
3867 "%lld" and "long long". Replaced the call to snprintf() with a call to
3870 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3871 records point to non-existent hosts", "retry timeout exceeded", and
3872 "retry time not reached for any host after a long failure period".
3874 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3875 experimental DomainKeys support:
3877 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3878 (2) On an error such as an illegally used "control", the wrong name for
3879 the control was given.
3881 These problems did NOT occur unless DomainKeys support was compiled.
3883 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3885 PH/24 Added ${if match_ip condition.
3887 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3888 databases so that it will be absolutely obvious if a crash occurs in the
3889 DB library. This is a regular occurrence (often caused by mis-matched
3892 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3893 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3894 picked up on a user's system that detects such things. There doesn't seem
3895 to be a gcc warning option for this - only an attribute that has to be
3896 put on the function's prototype. It seems that in Fedora Core 4 they have
3897 set this on a number of new functions. No doubt there will be more in due
3900 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3901 specify a transport. However, if an address that was verified by such a
3902 router was the subject of a callout, Exim crashed because it tried to
3903 read the rcpt_include_affixes from the non-existent transport. Now it
3904 just assumes that the setting of that option is false. This bug was
3905 introduced by 4.51/PH/31.
3907 PH/28 Changed -d+all to exclude +memory, because that information is very
3908 rarely of interest, but it makes the output a lot bigger. People tend to
3909 do -d+all out of habit.
3911 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3912 code in os-type was giving problems when libc.so lives in lib64, like on
3915 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3916 aren't the modern standard, and it seems that some systems' include files
3917 don't always have them. Exim was already checking for some of the newer
3918 ones like T_AAAA, and defining it itself. I've added checks for all the
3919 record types that Exim uses.
3921 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3922 not automatically generating a new one, as it is supposed to. This
3923 prevented TLS from working. If the file did exist, but contained invalid
3924 data, a new version was generated, as expected. It was only the case of a
3925 non-existent file that was broken.
3927 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3928 with a change in libdomainkeys > 0.64.
3930 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3931 from DNS. If the selector record carries the flag, it now has
3932 precedence over the domain-wide flag.
3934 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3936 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3937 the use of a port name that isn't defined in /etc/services) occurred, the
3938 message was deferred as in a normal delivery, and thus remained on the
3939 spool, instead of being failed because of the mua_wrapper setting. This
3940 is now fixed, and I tidied up some of the mua_wrapper messages at the
3943 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3944 the messages in a hash of arrays rather than using individual hashes.
3945 This is a bit cleaner and results in dramatic memory savings, albeit
3946 at a slight CPU cost.
3948 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3949 as requested by Marc Sherman.
3951 SC/10 Eximstats: added histograms for user specified patterns as requested
3954 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3956 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3957 fopen() in the content-scanning modules that did not already have it.
3963 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3964 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3966 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3968 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3970 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3971 to test Sieve filters that use "vacation".
3973 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3974 that changes the way the GnuTLS parameters are stored in the cache file.
3975 The new format can be generated externally. For backward compatibility,
3976 if the data in the cache doesn't make sense, Exim assumes it has read an
3977 old-format file, and it generates new data and writes a new file. This
3978 means that you can't go back to an older release without removing the
3981 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3982 work if there are any delivery delays because "one_time" forces the
3983 parent to be marked "delivered", so its unseen clone is never tried
3984 again. For this reason, Exim now forbids the simultaneous setting of
3987 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3988 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3989 entry if you want to know the details. The fix, however, neglected to
3990 consider the case when local delivery batching is involved. The test for
3991 "previously delivered" was not happening when checking to see if an
3992 address could be batched with a previous (undelivered) one; under
3993 certain circumstances this could lead to multiple deliveries to the same
3996 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3997 in its include files, and this causes problems building Exim.
3999 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4000 header_syntax) but Exim was just ignoring anything given after a slash.
4001 In particular, this caused confusion with an attempt to use "verify =
4002 reverse_host_lookup/defer_ok". An error is now given when options are
4003 supplied for verify items that do not have them. (Maybe reverse_host_
4004 lookup should have a defer_ok option, but that's a different point.)
4006 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4007 defined by RFC 821) to 2048, because there were problems with some AUTH
4008 commands, and RFC 1869 says the size should be increased for extended
4009 SMTP commands that take arguments.
4011 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4014 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4015 "unknown" error; now it says that the functionality isn't in the binary.
4017 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4018 an address' error message when a string expansion fails (syntax or
4019 whatever). Otherwise the password may appear in the log. Following change
4020 PH/42 below, there is no longer a chance of it appearing in a bounce
4023 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4025 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4026 of its addresses was ever tried. (Bugzilla bug #2.)
4028 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4029 the result incorrectly in the debug output. (It correctly added a newline
4030 to what was transported.)
4032 TF/01 Added $received_time.
4034 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4035 commented out examples of how to interface to a virus scanner and to
4036 SpamAssassin. Also added commented examples of av_scanner and
4037 spamd_address settings.
4039 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4040 and controls are allowed in which ACLs. There were a couple of minor
4041 errors. Some of the entries in the conditions table (which is a table of
4042 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4043 negation of where the condition IS allowed.
4045 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4047 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4048 header file does not have a version number, so I've had to invent a new
4049 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4050 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4051 radiusclient), but it was contributed by a Radius user.
4053 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4054 files or directories, for OpenSSL.
4056 PH/19 When an Exim process that is running as root has to create an Exim log
4057 file, it does so in a subprocess that runs as exim:exim so as to get the
4058 ownership right at creation (otherwise, other Exim processes might see
4059 the file with the wrong ownership). There was no test for failure of this
4060 fork() call, which would lead to the process getting stuck as it waited
4061 for a non-existent subprocess. Forks do occasionally fail when resources
4062 run out. I reviewed all the other calls to fork(); they all seem to check
4065 PH/20 When checking for unexpected SMTP input at connect time (before writing
4066 the banner), Exim was not dealing correctly with a non-positive return
4067 from the read() function. If the client had disconnected by this time,
4068 the result was a log entry for a synchronization error with an empty
4069 string after "input=" when read() returned zero. If read() returned -1
4070 (an event I could not check), uninitialized data bytes were printed.
4071 There were reports of junk text (parts of files, etc) appearing after
4074 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4076 PH/22 Added support for macro redefinition, and (re)definition in between
4077 driver and ACL definitions.
4079 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4080 forgetting to use the resulting value; it was using the unexpanded value.
4082 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4083 hadn't been configured. The fix is from Juergen Kreileder, who
4084 understands it better than I do:
4086 "Here's what I see happening with three configured cyrus_sasl
4087 authenticators configured (plain, login, cram-md5):
4089 On startup auth_cyrus_sasl_init() gets called for each of these.
4090 This means three calls to sasl_listmech() without a specified mech_list.
4091 => SASL tests which mechs of all available mechs actually work
4092 => three warnings about OTP not working
4093 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4095 With the patch, sasl_listmech() also gets called three times. But now
4096 SASL's mech_list option is set to the server_mech specified in the the
4097 authenticator. Or in other words, the answer from sasl_listmech()
4098 gets limited to just the mech you're testing for (which is different
4100 => the return list contains just 'plain' or 'login', 'cram-md5' or
4101 nothing depending on the value of ob->server_mech.
4103 I've just tested the patch: Authentication still works fine,
4104 unavailable mechs specified in the exim configuration are still
4105 caught, and the auth.log warnings about OTP are gone."
4107 PH/25 When debugging is enabled, the contents of the command line are added
4108 to the debugging output, even when log_selector=+arguments is not
4111 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4112 answer is "GNU", and only if the return is "GNU/something" is the answer
4115 PH/27 $acl_verify_message is now set immediately after the failure of a
4116 verification in an ACL, and so is available in subsequent modifiers. In
4117 particular, the message can be preserved by coding like this:
4119 warn !verify = sender
4120 set acl_m0 = $acl_verify_message
4122 Previously, $acl_verify_message was set only while expanding "message"
4123 and "log_message" when a very denied access.
4125 PH/28 Modified OS/os.c-Linux with
4127 -#ifndef OS_LOAD_AVERAGE
4128 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4130 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4131 nomenclature these days.)
4133 PH/29 Installed patch from the Sieve maintainer that adds the options
4134 sieve_useraddress and sieve_subaddress to the redirect router.
4136 PH/30 In these circumstances:
4137 . Two addresses routed to the same list of hosts;
4138 . First host does not offer TLS;
4139 . First host accepts first address;
4140 . First host gives temporary error to second address;
4141 . Second host offers TLS and a TLS session is established;
4142 . Second host accepts second address.
4143 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4144 and peerdn, if requested) that were in fact used only for the second
4147 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4148 attention to any local part prefix or suffix that was matched by the
4149 router that accepted the address. It now behaves in the same way as it
4150 does for delivery: the affixes are removed from the local part unless
4151 rcpt_include_affixes is set on the transport.
4153 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4154 timeout during the DATA phase of an incoming message.
4156 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4157 applied a patch sanctioned by the Sieve maintainer.
4159 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4160 the uid or gid is negative. A case of a negative gid caused this to be
4161 noticed. The fix allows for either to be negative.
4163 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4164 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4167 PH/36 The change PH/12 above was broken. Fixed it.
4169 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4170 the grounds that routing the same address twice would always produce the
4171 same answer. This might have been true once, but it is certainly no
4172 longer true now. Routing a child address may depend on the previous
4173 routing that produced that child. Some complicated redirection strategies
4174 went wrong when messages had multiple recipients, and made Exim's
4175 behaviour dependent on the order in which the addresses were given.
4177 I have moved the duplicate checking until after the routing is complete.
4178 Exim scans the addresses that are assigned to local and remote
4179 transports, and removes any duplicates. This means that more work will be
4180 done, as duplicates will always all be routed, but duplicates are
4181 presumably rare, so I don't expect this is of any significance.
4183 For deliveries to pipes, files, and autoreplies, the duplicate checking
4184 still happens during the routing process, since they are not going to be
4187 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4188 It corrects a timeout issue with spamd. This is Ian's comment: "The
4189 background is that sometimes spamd either never reads data from a
4190 connection it has accepted, or it never writes response data. The exiscan
4191 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4192 blindly assumes that writes won't block so it may never time out."
4194 PH/39 Allow G after quota size as well as K and M.
4196 PH/40 The value set for $authenticated_id in an authenticator may not contain
4197 binary zeroes or newlines because the value is written to log lines and
4198 to spool files. There was no check on this. Now the value is run through
4199 the string_printing() function so that such characters are converted to
4200 printable escape sequences.
4202 PH/41 $message_linecount is a new variable that contains the total number of
4203 lines in the message. Compare $body_linecount, which is the count for the
4206 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4207 bounce and delay warning messages, except in certain special cases, which
4210 (a) An SMTP error message from a remote host;
4211 (b) A message specified in a :fail: redirection;
4212 (c) A message specified in a "fail" command in a system filter;
4213 (d) A message specified in a FAIL return from the queryprogram router;
4214 (e) A message specified by the cannot_route_message router option.
4216 In these cases only, Exim does include the error details in bounce and
4217 warning messages. There are also a few cases where bland messages such
4218 as "unrouteable address" or "local delivery error" are given.
4220 PH/43 $value is now also set for the "else" part of a ${run expansion.
4222 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4223 being worked on, but at least Exim now implements the latest version to
4226 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4227 process to complete was treated as a delivery failure, a timeout while
4228 writing the message to the pipe was logged, but erroneously treated as a
4229 successful delivery. Such timeouts include transport filter timeouts. For
4230 consistency with the overall process timeout, these timeouts are now
4231 treated as errors, giving rise to delivery failures by default. However,
4232 there is now a new Boolean option for the pipe transport called
4233 timeout_defer, which, if set TRUE, converts the failures into defers for
4234 both kinds of timeout. A transport filter timeout is now identified in
4237 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4238 systems where "make" and "gmake" are different, calling "gmake" at top
4239 level broke things. I've arranged for the value of $(MAKE) to be passed
4240 from the Makefile to this script so that it can call the same version of
4244 A note about Exim versions 4.44 and 4.50
4245 ----------------------------------------
4247 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4248 changes of various kinds. As a consequence, a big documentation update was
4249 needed. This delayed the release for rather longer than seemed good, especially
4250 in the light of a couple of (minor) security issues. Therefore, the changes
4251 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4252 release. So 4.44 and 4.50 are in effect two different branches that both start
4255 I have left the 4.50 change log unchanged; it contains all the changes since
4256 4.43. The change log for 4.44 is below; many of its items are identical to
4257 those for 4.50. This seems to be the most sensible way to preserve the
4258 historical information.
4264 1. Minor wording change to the doc/README.SIEVE file.
4266 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4267 computation of the current number of files was incorrect.
4269 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4270 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4273 4. Give more explanation in the error message when the command for a transport
4274 filter fails to execute.
4276 5. There are several places where Exim runs a non-Exim command in a
4277 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4278 was being done only for the command run by the queryprogram router. It is
4279 now done for all such subprocesses. The other cases are: ${run, transport
4280 filters, and the commands run by the lmtp and pipe transports.
4282 6. Added CONFIGURE_GROUP build-time option.
4284 7. Some older OS have a limit of 256 on the maximum number of file
4285 descriptors. Exim was using setrlimit() to set 1000 as a large value
4286 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4287 systems. I've change it so that if it can't get 1000, it tries for 256.
4289 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4290 was an oversight, and furthermore, ever since the addition of extra
4291 controls (e.g. 4.43/32), the checks on when to allow different forms of
4292 "control" were broken. There should now be diagnostics for all cases when a
4293 control that does not make sense is encountered.
4295 9. Added the /retain_sender option to "control=submission".
4297 10. $recipients is now available in the predata ACL (oversight).
4299 11. Tidy the search cache before the fork to do a delivery from a message
4300 received from the command line. Otherwise the child will trigger a lookup
4301 failure and thereby defer the delivery if it tries to use (for example) a
4302 cached ldap connection that the parent has called unbind on.
4304 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4305 of $address_data from the recipient verification was clobbered by the
4306 sender verification.
4308 13. The value of address_data from a sender verification is now available in
4309 $sender_address_data in subsequent conditions in the ACL statement.
4311 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4313 15. Added a new option "connect=<time>" to callout options, to set a different
4316 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4317 was its contents. (It was OK if the option was not defined at all.)
4319 17. A "Completed" log line is now written for messages that are removed from
4320 the spool by the -Mrm option.
4322 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4323 information about exactly what failed.
4325 19. Added -dd to debug only the daemon process.
4327 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4328 handles timeouts, both on the server side and network timeouts. Renamed the
4329 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4331 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4332 It is now set to "smtps".
4334 22. $host_address is now set to the target address during the checking of
4335 ignore_target_hosts.
4337 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4338 being passed; this would have caused $sender_host_name to have been used if
4339 matching the list had actually called for a host name (not very likely,
4340 since this list is usually IP addresses). A host name is now passed as
4343 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4344 code that specifies a non-restarting handler (typically sigaction() in
4345 modern systems) in an attempt to fix a rare and obscure crash bug.
4347 25. Narrowed the window for a race in the daemon that could cause it to ignore
4348 SIGCHLD signals. This is not a major problem, because they are used only to
4349 wake it up if nothing else does.
4351 26. A malformed maildirsize file could cause Exim to calculate negative values
4352 for the mailbox size or file count. Odd effects could occur as a result.
4353 The maildirsize information is now recalculated if the size or filecount
4356 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4357 support for a long time. Removed HAVE_SYS_VFS_H.
4359 28. Installed the latest version of exipick from John Jetmore.
4361 29. In an address list, if the pattern was not a regular expression, an empty
4362 subject address (from a bounce message) matched only if the pattern was an
4363 empty string. Non-empty patterns were not even tested. This was the wrong
4364 because it is perfectly reasonable to use an empty address as part of a
4365 database query. An empty address is now tested by patterns that are
4366 lookups. However, all the other forms of pattern expect the subject to
4367 contain a local part and a domain, and therefore, for them, an empty
4368 address still always fails if the pattern is not itself empty.
4370 30. Exim went into a mad DNS loop when attempting to do a callout where the
4371 host was specified on an smtp transport, and looking it up yielded more
4372 than one IP address.
4374 31. Re-factored the code for checking spool and log partition space into a
4375 function that finds that data and another that does the check. The former
4376 is then used to implement four new variables: $spool_space, $log_space,
4377 $spool_inodes, and $log_inodes.
4379 32. The RFC2047 encoding function was originally intended for short strings
4380 such as real names; it was not keeping to the 75-character limit for
4381 encoded words that the RFC imposes. It now respects the limit, and
4382 generates multiple encoded words if necessary. To be on the safe side, I
4383 have increased the buffer size for the ${rfc2047: expansion operator from
4386 33. It is now permitted to omit both strings after an "if" condition; if the
4387 condition is true, the result is "true". As before, when the second string
4388 is omitted, a false condition yields an empty string. This makes it less
4389 cumbersome to write custom ACL and router conditions.
4391 34. Failure to deliver a bounce message always caused it to be frozen, even if
4392 there was an errors_to setting on the router. The errors_to setting is now
4395 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4396 canonical form (fully expanded) before being placed in
4397 $sender_host_address.
4399 36. The table in the code that translates DNS record types into text (T_A to
4400 "A" for instance) was missing entries for NS and CNAME. It is just possible
4401 that this could have caused confusion if both these types were looked up
4402 for the same domain, because the text type is used as part of Exim's
4403 per-process caching. But the chance of anyone hitting this buglet seems
4406 37. The dnsdb lookup has been extended in a number of ways.
4408 (1) There is a new type, "zns", which walks up the domain tree until it
4409 finds some nameserver records. It should be used with care.
4411 (2) There is a new type, "mxh", which is like "mx" except that it returns
4412 just the host names, not the priorities.
4414 (3) It is now possible to give a list of domains (or IP addresses) to be
4415 looked up. The behaviour when one of the lookups defers can be
4416 controlled by a keyword.
4418 (4) It is now possible to specify the separator character for use when
4419 multiple records are returned.
4421 38. The dnslists ACL condition has been extended: it is now possible to supply
4422 a list of IP addresses and/or domains to be looked up in a particular DNS
4425 39. Added log_selector=+queue_time_overall.
4427 40. When running the queue in the test harness, wait just a tad after forking a
4428 delivery process, to get repeatability of debugging output.
4430 41. Include certificate and key file names in error message when GnuTLS fails
4431 to set them up, because the GnuTLS error message doesn't include the name
4432 of the failing file when there is a problem reading it.
4434 42. Allow both -bf and -bF in the same test run.
4436 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4438 44. The "Exiscan patch" is now merged into the mainline Exim source.
4440 45. Sometimes the final signoff response after QUIT could fail to get
4441 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4442 < 0 before doing a fflush(). This bug looks as though it goes back to the
4443 introduction of TLS in release 3.20, but "sometimes" must have been rare
4444 because the tests only now provoked it.
4446 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4447 (this can affect the format of dates).
4449 47. exim_tidydb, when checking for the continued existence of a message for
4450 which it has found a message-specific retry record, was not finding
4451 messages that were in split spool directories. Consequently, it was
4452 deleting retry records that should have stayed in existence.
4454 48. Steve fixed some bugs in eximstats.
4456 49. The SPA authentication driver was not abandoning authentication and moving
4457 on to the next authenticator when an expansion was forced to fail,
4458 contradicting the general specification for all authenticators. Instead it
4459 was generating a temporary error. It now behaves as specified.
4461 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4462 (the order specifies the preference for clients). The order is now AES256,
4463 AES128, 3DES, ARCFOUR128.
4465 51. Small patch to Sieve code - explicitly set From: when generating an
4468 52. Exim crashed if a remote delivery caused a very long error message to be
4469 recorded - for instance if somebody sent an entire SpamAssassin report back
4470 as a large number of 550 error lines. This bug was coincidentally fixed by
4471 increasing the size of one of Exim's internal buffers (big_buffer) that
4472 happened as part of the Exiscan merge. However, to be on the safe side, I
4473 have made the code more robust (and fixed the comments that describe what
4476 53. Now that there can be additional text after "Completed" in log lines (if
4477 the queue_time_overall log selector is set), a one-byte patch to exigrep
4478 was needed to allow it to recognize "Completed" as not the last thing in
4481 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4482 patch that reportedly fixes this has been added. I am not expert enough to
4483 create a test for it. This is what the patch creator wrote:
4485 "I found a little strange behaviour of ldap code when working with
4486 Windows 2003 AD Domain, where users was placed in more than one
4487 Organization Units. When I tried to give exim partial DN, the exit code
4488 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4489 But simultaneously result of request was absolutely normal ldap result,
4490 so I produce this patch..."
4492 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4493 REFERENCE, so I have modified the code to exclude the patch when that macro
4496 55. Some experimental protocols are using DNS PTR records for new purposes. The
4497 keys for these records are domain names, not reversed IP addresses. The
4498 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4499 leaves it alone. Component reversal etc. now happens only for IP addresses.
4502 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4504 57. Double the size of the debug message buffer (to 2048) so that more of very
4505 long debug lines gets shown.
4507 58. The exicyclog utility now does better if the number of log files to keep
4508 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4510 59. Two changes related to the smtp_active_hostname option:
4512 (1) $smtp_active_hostname is now available as a variable.
4513 (2) The default for smtp_banner uses $smtp_active_hostname instead
4514 of $primary_hostname.
4516 60. The host_aton() function is supposed to be passed a string that is known
4517 to be a valid IP address. However, in the case of IPv6 addresses, it was
4518 not checking this. This is a hostage to fortune. Exim now panics and dies
4519 if the condition is not met. A case was found where this could be provoked
4520 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4521 components; fortuitously, this particular loophole had already been fixed
4522 by change 4.50/55 above.
4524 If there are any other similar loopholes, the new check in host_aton()
4525 itself should stop them being exploited. The report I received stated that
4526 data on the command line could provoke the exploit when Exim was running as
4527 exim, but did not say which command line option was involved. All I could
4528 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4529 running as the user.
4532 61. There was a buffer overflow vulnerability in the SPA authentication code
4533 (which came originally from the Samba project). I have added a test to the
4534 spa_base64_to_bits() function which I hope fixes it.
4537 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4538 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4540 63. The daemon start-up calls getloadavg() while still root for those OS that
4541 need the first call to be done as root, but it missed one case: when
4542 deliver_queue_load_max is set with deliver_drop_privilege. This is
4543 necessary for the benefit of the queue runner, because there is no re-exec
4544 when deliver_drop_privilege is set.
4546 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4547 This has been fixed.
4549 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4550 was in use, was not putting the data itself into the right store pool;
4551 consequently, it could be overwritten for a subsequent message in the same
4552 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4555 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4557 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4558 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4559 the function were treating the return as a boolean value, which happened to
4560 work because 0=false and not-0=true, but is not correct code.
4562 68. The host_aton() function was not handling scoped IPv6 addresses (those
4563 with, for example, "%eth0" on the end) correctly.
4565 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4566 negated items (that is, ~something) in unsigned ints. Some compilers
4567 apparently mutter when there is no cast.
4569 70. If an address verification called from an ACL failed, and did not produce a
4570 user-specific message (i.e. there was only a "system" message), nothing was
4571 put in $acl_verify_message. In this situation, it now puts the system
4574 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4575 session; change 4.31/43 added the unwanted input to the log line - except
4576 that it did not do this in the start of session case. It now does.
4578 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4579 This is wrong and can cause the other end to generate a synchronization
4580 error if it is another Exim or anything else that does the synchronization
4581 check. A QUIT command is no longer sent after a timeout.
4583 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4584 during host lookups.
4586 74. The defer_ok option of callout verification was not working if it was used
4587 when verifying addresses in header lines, that is, for this case:
4589 verify = header_sender/callout=defer_ok
4591 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4592 those file descriptors could be used for SMTP connections. If anything
4593 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4594 could be sent to the SMTP client, causing chaos. The daemon now opens
4595 stdin, stdout, and stderr to /dev/null when it puts itself into the
4598 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4599 log by default. The user can override this with suitable Perl magic.
4601 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4602 the log message when discard triggers, was not working for the DATA ACL or
4603 for the non-SMTP ACL.
4605 78. Error message wording change in sieve.c.
4607 79. If smtp_accept_max_per_host was set, the number of connections could be
4608 restricted to fewer than expected, because the daemon was trying to set up
4609 a new connection before checking whether the processes handling previous
4610 connections had finished. The check for completed processes is now done
4611 earlier. On busy systems, this bug wouldn't be noticed because something
4612 else would have woken the daemon, and it would have reaped the completed
4615 80. If a message was submitted locally by a user whose login name contained one
4616 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4617 It caused a spool format error. I have fixed the spool reading code. A
4618 related problem was that the "from" clause in the Received: line became
4619 illegal because of the space(s). It is now covered by ${quote_local_part.
4621 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4624 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4626 83. Patch from Sieve maintainer to fix unterminated string problem in
4627 "vacation" handling.
4629 84. Some minor changes to the Linux configuration files to help with other
4630 OS variants using glibc.
4632 85. One more patch for Sieve to update vacation handling to latest spec.
4635 ----------------------------------------------------
4636 See the note above about the 4.44 and 4.50 releases.
4637 ----------------------------------------------------
4643 1. Change 4.43/35 introduced a bug that caused file counts to be
4644 incorrectly computed when quota_filecount was set in an appendfile
4647 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4648 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4651 3. Give more explanation in the error message when the command for a transport
4652 filter fails to execute.
4654 4. There are several places where Exim runs a non-Exim command in a
4655 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4656 was being done only for the command run by the queryprogram router. It is
4657 now done for all such subprocesses. The other cases are: ${run, transport
4658 filters, and the commands run by the lmtp and pipe transports.
4660 5. Some older OS have a limit of 256 on the maximum number of file
4661 descriptors. Exim was using setrlimit() to set 1000 as a large value
4662 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4663 systems. I've change it so that if it can't get 1000, it tries for 256.
4665 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4666 was an oversight, and furthermore, ever since the addition of extra
4667 controls (e.g. 4.43/32), the checks on when to allow different forms of
4668 "control" were broken. There should now be diagnostics for all cases when a
4669 control that does not make sense is encountered.
4671 7. $recipients is now available in the predata ACL (oversight).
4673 8. Tidy the search cache before the fork to do a delivery from a message
4674 received from the command line. Otherwise the child will trigger a lookup
4675 failure and thereby defer the delivery if it tries to use (for example) a
4676 cached ldap connection that the parent has called unbind on.
4678 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4679 of $address_data from the recipient verification was clobbered by the
4680 sender verification.
4682 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4683 was its contents. (It was OK if the option was not defined at all.)
4685 11. A "Completed" log line is now written for messages that are removed from
4686 the spool by the -Mrm option.
4688 12. $host_address is now set to the target address during the checking of
4689 ignore_target_hosts.
4691 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4692 being passed; this would have caused $sender_host_name to have been used if
4693 matching the list had actually called for a host name (not very likely,
4694 since this list is usually IP addresses). A host name is now passed as
4697 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4698 code that specifies a non-restarting handler (typically sigaction() in
4699 modern systems) in an attempt to fix a rare and obscure crash bug.
4701 15. Narrowed the window for a race in the daemon that could cause it to ignore
4702 SIGCHLD signals. This is not a major problem, because they are used only to
4703 wake it up if nothing else does.
4705 16. A malformed maildirsize file could cause Exim to calculate negative values
4706 for the mailbox size or file count. Odd effects could occur as a result.
4707 The maildirsize information is now recalculated if the size or filecount
4710 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4711 support for a long time. Removed HAVE_SYS_VFS_H.
4713 18. Updated exipick to current release from John Jetmore.
4715 19. Allow an empty sender to be matched against a lookup in an address list.
4716 Previously the only cases considered were a regular expression, or an
4719 20. Exim went into a mad DNS lookup loop when doing a callout where the
4720 host was specified on the transport, if the DNS lookup yielded more than
4723 21. The RFC2047 encoding function was originally intended for short strings
4724 such as real names; it was not keeping to the 75-character limit for
4725 encoded words that the RFC imposes. It now respects the limit, and
4726 generates multiple encoded words if necessary. To be on the safe side, I
4727 have increased the buffer size for the ${rfc2047: expansion operator from
4730 22. Failure to deliver a bounce message always caused it to be frozen, even if
4731 there was an errors_to setting on the router. The errors_to setting is now
4734 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4735 canonical form (fully expanded) before being placed in
4736 $sender_host_address.
4738 24. Updated eximstats to version 1.33
4740 25. Include certificate and key file names in error message when GnuTLS fails
4741 to set them up, because the GnuTLS error message doesn't include the name
4742 of the failing file when there is a problem reading it.
4744 26. Expand error message when OpenSSL has problems setting up cert/key files.
4747 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4748 (this can affect the format of dates).
4750 28. exim_tidydb, when checking for the continued existence of a message for
4751 which it has found a message-specific retry record, was not finding
4752 messages that were in split spool directories. Consequently, it was
4753 deleting retry records that should have stayed in existence.
4755 29. eximstats updated to version 1.35
4756 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4757 1.35 - bugfix such that pie charts by volume are generated correctly
4759 30. The SPA authentication driver was not abandoning authentication and moving
4760 on to the next authenticator when an expansion was forced to fail,
4761 contradicting the general specification for all authenticators. Instead it
4762 was generating a temporary error. It now behaves as specified.
4764 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4765 (the order specifies the preference for clients). The order is now AES256,
4766 AES128, 3DES, ARCFOUR128.
4768 31. Small patch to Sieve code - explicitly set From: when generating an
4771 32. Exim crashed if a remote delivery caused a very long error message to be
4772 recorded - for instance if somebody sent an entire SpamAssassin report back
4773 as a large number of 550 error lines. This bug was coincidentally fixed by
4774 increasing the size of one of Exim's internal buffers (big_buffer) that
4775 happened as part of the Exiscan merge. However, to be on the safe side, I
4776 have made the code more robust (and fixed the comments that describe what
4779 33. Some experimental protocols are using DNS PTR records for new purposes. The
4780 keys for these records are domain names, not reversed IP addresses. The
4781 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4782 leaves it alone. Component reversal etc. now happens only for IP addresses.
4785 34. The host_aton() function is supposed to be passed a string that is known
4786 to be a valid IP address. However, in the case of IPv6 addresses, it was
4787 not checking this. This is a hostage to fortune. Exim now panics and dies
4788 if the condition is not met. A case was found where this could be provoked
4789 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4790 components; fortuitously, this particular loophole had already been fixed
4791 by change 4.50/55 or 4.44/33 above.
4793 If there are any other similar loopholes, the new check in host_aton()
4794 itself should stop them being exploited. The report I received stated that
4795 data on the command line could provoke the exploit when Exim was running as
4796 exim, but did not say which command line option was involved. All I could
4797 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4798 running as the user.
4801 35. There was a buffer overflow vulnerability in the SPA authentication code
4802 (which came originally from the Samba project). I have added a test to the
4803 spa_base64_to_bits() function which I hope fixes it.
4806 36. The daemon start-up calls getloadavg() while still root for those OS that
4807 need the first call to be done as root, but it missed one case: when
4808 deliver_queue_load_max is set with deliver_drop_privilege. This is
4809 necessary for the benefit of the queue runner, because there is no re-exec
4810 when deliver_drop_privilege is set.
4812 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4813 was in use, was not putting the data itself into the right store pool;
4814 consequently, it could be overwritten for a subsequent message in the same
4815 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4818 38. Sometimes the final signoff response after QUIT could fail to get
4819 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4820 < 0 before doing a fflush(). This bug looks as though it goes back to the
4821 introduction of TLS in release 3.20, but "sometimes" must have been rare
4822 because the tests only now provoked it.
4828 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4829 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4830 Now it returns an integer. A number of calls were still expecting a T/F
4831 return. Fortuitously, in all cases, the tests worked in OK situations,
4832 which is the norm. However, things would have gone wrong on any write
4833 failures on the smtp file descriptor. This function is used when sending
4834 messages over SMTP and also when doing verify callouts.
4836 2. When Exim is called to do synchronous delivery of a locally submitted
4837 message (the -odf or -odi options), it no longer closes stderr before doing
4840 3. Implemented the mua_wrapper option.
4842 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4844 5. Implemented the functions header_remove(), header_testname(),
4845 header_add_at_position(), and receive_remove_recipient(), and exported them
4848 6. If an ACL "warn" statement specified the addition of headers, Exim already
4849 inserted X-ACL-Warn: at the start if there was no header name. However, it
4850 was not making this test for the second and subsequent header lines if
4851 there were newlines in the string. This meant that an invalid header could
4852 be inserted if Exim was badly configured.
4854 7. Allow an ACL "warn" statement to add header lines at the start or after all
4855 the Received: headers, as well as at the end.
4857 8. Added the rcpt_4xx retry error code.
4859 9. Added postmaster_mailfrom=xxx to callout verification option.
4861 10. Added mailfrom=xxxx to the callout verification option, for verify=
4864 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4865 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4867 12. Inserted some casts to stop certain compilers warning when using pointer
4868 differences as field lengths or precisions in printf-type calls (mostly
4869 affecting debugging statements).
4871 13. Added optional readline() support for -be (dynamically loaded).
4873 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4874 same clock tick as a message's arrival, so that its received time was the
4875 same as the "first fail" time on the retry record, and that message
4876 remained on the queue past the ultimate address timeout, every queue runner
4877 would try a delivery (because it was past the ultimate address timeout) but
4878 after another failure, the ultimate address timeout, which should have then
4879 bounced the address, did not kick in. This was a "< instead of <=" error;
4880 in most cases the first failure would have been in the next clock tick
4881 after the received time, and all would be well.
4883 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4884 being recognized when the domain list was tested by the match_domain
4885 condition in an expansion string.
4887 16. Added the ${str2b64: operator.
4889 17. Exim was always calling setrlimit() to set a large limit for the number of
4890 processes, without checking whether the existing limit was already
4891 adequate. (It did check for the limit on file descriptors.) Furthermore,
4892 errors from getrlimit() and setrlimit() were being ignored. Now they are
4893 logged to the main and panic logs, but Exim does carry on, to try to do its
4894 job under whatever limits there are.
4896 18. Imported PCRE 5.0.
4898 19. Trivial typo in log message " temporarily refused connection" (the leading
4901 20. If the log selector return_path_on_delivery was set and an address was
4902 redirected to /dev/null, the delivery process crashed because it assumed
4903 that a return path would always be set for a "successful" delivery. In this
4904 case, the whole delivery is bypassed as an optimization, and therefore no
4907 21. Internal re-arrangement: the function for sending a challenge and reading
4908 a response while authentication was assuming a zero-terminated challenge
4909 string. It's now changed to take a pointer and a length, to allow for
4910 binary data in such strings.
4912 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4914 23. Exim was not respecting finduser_retries when seeking the login of the
4915 uid under which it was called; it was always trying 10 times. (The default
4916 setting of finduser_retries is zero.) Also, it was sleeping after the final
4917 failure, which is pointless.
4919 24. Implemented tls_on_connect_ports.
4921 25. Implemented acl_smtp_predata.
4923 26. If the domain in control=submission is set empty, Exim assumes that the
4924 authenticated id is a complete email address when it generates From: or
4925 Sender: header lines.
4927 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4928 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4929 chown and chgrp in /bin and hostname in /usr/bin.
4931 28. Exim was keeping the "process log" file open after each use, just as it
4932 does for the main log. This opens the possibility of it remaining open for
4933 long periods when the USR1 signal hits a daemon. Occasional processlog
4934 errors were reported, that could have been caused by this. Anyway, it seems
4935 much more sensible not to leave this file open at all, so that is what now
4938 29. The long-running daemon process does not normally write to the log once it
4939 has entered its main loop, and it closes the log before doing so. This is
4940 so that log files can straightforwardly be renamed and moved. However,
4941 there are a couple of unusual error situations where the daemon does write
4942 log entries, and I had neglected to close the log afterwards.
4944 30. The text of an SMTP error response that was received during a remote
4945 delivery was being truncated at 512 bytes. This is too short for some of
4946 the long messages that one sometimes sees. I've increased the limit to
4949 31. It is now possible to make retry rules that apply only when a message has a
4950 specific sender, in particular, an empty sender.
4952 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4953 it possible to be selective about when SMTP synchronization is enforced.
4955 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4957 32. Implemented hosts_connection_nolog.
4959 33. Added an ACL for QUIT.
4961 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4964 35. Added mailbox_size and mailbox_filecount to appendfile.
4966 36. Added control = no_multiline_responses to ACLs.
4968 37. There was a bug in the logic of the code that waits for the clock to tick
4969 in the case where the clock went backwards by a substantial amount such
4970 that the microsecond fraction of "now" was more than the microsecond
4971 fraction of "then" (but the whole seconds number was less).
4973 38. Added support for the libradius Radius client library this is found on
4974 FreeBSD (previously only the radiusclient library was supported).
4980 1. When certain lookups returned multiple values in the form name=value, the
4981 quoting of the values was not always being done properly. Specifically:
4982 (a) If the value started with a double quote, but contained no whitespace,
4984 (b) If the value contained whitespace other than a space character (i.e.
4985 tabs or newlines or carriage returns) it was not quoted.
4986 This fix has been applied to the mysql and pgsql lookups by writing a
4987 separate quoting function and calling it from the lookup code. The fix
4988 should probably also be applied to nisplus, ibase and oracle lookups, but
4989 since I cannot test any of those, I have not disturbed their existing code.
4991 2. A hit in the callout cache for a specific address caused a log line with no
4992 reason for rejecting RCPT. Now it says "Previous (cached) callout
4993 verification failure".
4995 3. There was an off-by-one bug in the queryprogram router. An over-long
4996 return line was truncated at 256 instead of 255 characters, thereby
4997 overflowing its buffer with the terminating zero. As well as fixing this, I
4998 have increased the buffer size to 1024 (and made a note to document this).
5000 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5001 when Exim is waiting for an SMTP response from a remote server, Exim
5002 restarts its select() call on the socket, thereby resetting its timeout.
5003 This is not a problem when such interrupts are rare. Somebody set up a cron
5004 job to run exiwhat every 2 minutes, which is less than the normal select()
5005 timeout (5 or 10 minutes). This meant that the select() timeout never
5006 kicked in because it was always reset. I have fixed this by comparing the
5007 time when an interrupt arrives with the time at the start of the first call
5008 to select(). If more time than the timeout has elapsed, the interrupt is
5009 treated as a timeout.
5011 5. Some internal re-factoring in preparation for the addition of Sieve
5012 extensions (by MH). In particular, the "personal" test is moved to a
5013 separate function, and given an option for scanning Cc: and Bcc: (which is
5014 not set for Exim filters).
5016 6. When Exim created an email address using the login of the caller as the
5017 local part (e.g. when creating a From: or Sender: header line), it was not
5018 quoting the local part when it contained special characters such as @.
5020 7. Installed new OpenBSD configuration files.
5022 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5023 try to make them clearer.
5025 9. Callout options, other than the timeout value, were being ignored when
5026 verifying sender addresses in header lines. For example, when using
5028 verify = header_sender/callout=no_cache
5030 the cache was (incorrectly) being used.
5032 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5033 only the Cygwin environment.
5035 11. When return_path_on_delivery was set as a log selector, if different remote
5036 addresses in the same message used different return paths and parallel
5037 remote delivery occurred, the wrong values would sometimes be logged.
5038 (Whenever a remote delivery process finished, the return path value from
5039 the most recently started remote delivery process was logged.)
5041 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5042 lines when AUTH and/or TLS are in use. This is the "received protocol"
5043 field. Exim used to use "asmtp" for authenticated SMTP, without any
5044 indication (in the protocol name) for TLS use. Now it follows the RFC and
5045 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5046 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5047 names appear in log lines as well as in Received: header lines.
5049 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5050 extensions, and comparison tests, and to fix some bugs.
5052 14. Changes to the "personal" filter test:
5054 (1) The test was buggy in that it was just doing the equivalent of
5055 "contains" tests on header lines. For example, if a user's address was
5056 anne@some.where, the "personal" test would incorrectly be true for
5058 To: susanne@some.where
5060 This test is now done by extracting each address from the header in turn,
5061 and checking the entire address. Other tests that are part of "personal"
5062 are now done using regular expressions (for example, to check local parts
5063 of addresses in From: header lines).
5065 (2) The list of non-personal local parts in From: addresses has been
5066 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5067 taken from the Sieve specification recommendations.
5069 (3) If the message contains any header line starting with "List-" it is
5070 treated as non-personal.
5072 (4) The test for "circular" in the Subject: header line has been removed
5073 because it now seems ill-conceived.
5075 15. Minor typos in src/EDITME comments corrected.
5077 16. Installed latest exipick from John Jetmore.
5079 17. If headers_add on a router specified a text string that was too long for
5080 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5081 of string_sprintf() is now avoided.
5083 18. $message_body_size was not set (it was always zero) when running the DATA
5084 ACL and the local_scan() function.
5086 19. For the "mail" command in an Exim filter, no default was being set for
5087 the once_repeat time, causing a random time value to be used if "once" was
5088 specified. (If the value happened to be <= 0, no repeat happened.) The
5089 default is now 0s, meaning "never repeat". The "vacation" command was OK
5090 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5091 (I found it when inspecting the code).
5093 20. There is now an overall timeout for performing a callout verification. It
5094 defaults to 4 times the callout timeout, which applies to individual SMTP
5095 commands during the callout. The overall timeout applies when there is more
5096 than one host that can be tried. The timeout is checked before trying the
5097 next host. This prevents very long delays if there are a large number of
5098 hosts and all are timing out (e.g. when the network connections are timing
5099 out). The value of the overall timeout can be changed by specifying an
5100 additional sub-option for "callout", called "maxwait". For example:
5102 verify = sender/callout=5s,maxwait=20s
5104 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5105 to the end before writing, but this should make it even safer).
5107 22. Exim was forgetting that it had advertised PIPELINING for the second and
5108 subsequent messages on an SMTP connection. It was also not resetting its
5109 memory on STARTTLS and an internal HELO.
5111 23. When Exim logs an SMTP synchronization error within a session, it now
5112 records whether PIPELINING has been advertised or not.
5114 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5115 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5116 rather than long int.
5118 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5120 26. Added the never_mail option to autoreply.
5126 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5127 crash if the getsockname() call failed; this can happen if a connection is
5128 closed very soon after it is established. The problem was simply in the
5129 order in which certain operations were done, causing Exim to try to write
5130 to the SMTP stream before it had set up the file descriptor. The bug has
5131 been fixed by making things happen in the correct order.
5137 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5138 before the connection was closed, thus losing the rejection response.
5140 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5141 some early Solaris releases, but causes trouble in current releases where
5142 socklen_t is defined.
5144 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5147 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5150 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5151 that releasing the top of it at the end releases what was used for sub-
5152 expansions (unless the block got too big). However, discard this block if
5153 the first thing is a variable or header, so that we can use its block when
5154 it is dynamic (useful for very large $message_headers, for example).
5156 6. Lookups now cache *every* query, not just the most recent. A new, separate
5157 store pool is used for this. It can be recovered when all lookup caches are
5158 flushed. Lookups now release memory at the end of their result strings.
5159 This has involved some general refactoring of the lookup sources.
5161 7. Some code has been added to the store_xxx() functions to reduce the amount
5162 of flapping under certain conditions.
5164 8. log_incoming_interface used to affect only the <= reception log lines. Now
5165 it causes the local interface and port to be added to several more SMTP log
5166 lines, for example "SMTP connection from", and rejection lines.
5168 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5170 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5172 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5173 could be overwritten at the end of the current message (or the start of a
5174 new message if it was set in a HELO ACL). The value is now preserved for
5175 the duration of the SMTP connection.
5177 12. If a transport had a headers_rewrite setting, and a matching header line
5178 contained an unqualified address, that address was qualified, even if it
5179 did not match any rewriting rules. The underlying bug was that the values
5180 of the flags that permit the existence of unqualified sender and recipient
5181 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5182 non-local messages, and by -bnq for local messages) were not being
5183 preserved with the message after it was received.
5185 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5186 "next input=" as part of the text comprising the host identity instead of
5187 the correct text. The code was using the same buffer for two different
5188 strings. However, depending on which order the printing function evaluated
5189 its arguments, the bug did not always show up. Under Linux, for example, my
5190 test suite worked just fine.
5192 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5193 doesn't work with some older versions of Perl. It has been changed to "my",
5194 which in any case is probably the better facility to use.
5196 15. A really picky compiler found some instances of statements for creating
5197 error messages that either had too many or two few arguments for the format
5200 16. The size of the buffer for calls to the DNS resolver has been increased
5201 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5202 for addresses that have a lot of PTR records. This alleviates a problem; it
5203 does not fully solve it.
5205 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5206 buffer now truncates the list and logs the incident, which is the same
5207 action as happens when Exim is looking up a host name and its aliases.
5208 Previously in this situation something unpredictable would happen;
5209 sometimes it was "internal error: store_reset failed".
5211 18. If a server dropped the connection unexpectedly when an Exim client was
5212 using GnuTLS and trying to read a response, the client delivery process
5213 crashed while trying to generate an error log message.
5215 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5216 string, for example:
5218 warn message = H1: something\nH2: something
5220 the text was added as a single header line from Exim's point of view
5221 though it ended up OK in the delivered message. However, searching for the
5222 second and subsequent header lines using $h_h2: did not work. This has been
5223 fixed. Similarly, if a system filter added multiple headers in this way,
5224 the routers could not see them.
5226 20. Expanded the error message when iplsearch is called with an invalid key to
5227 suggest using net-iplsearch in a host list.
5229 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5230 ACLs are no longer actually imposed (and a message to that effect is
5233 22. If a "gecos" field in a passwd entry contained escaped characters, in
5234 particular, if it contained a \" sequence, Exim got it wrong when building
5235 a From: or a Sender: header from that name. A second bug also caused
5236 incorrect handling when an unquoted " was present following a character
5237 that needed quoting.
5239 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5240 was not being matched caselessly.
5242 24. Arranged for all hyphens in the exim.8 source to be escaped with
5245 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5246 properly. Recipient callout cache records were still being keyed to include
5247 the sender, even when use_sender was set false. This led to far more
5248 callouts that were necessary. The sender is no longer included in the key
5249 when use_sender is false.
5251 26. Added "control = submission" modifier to ACLs.
5253 27. Added the ${base62d: operator to decode base 62 numbers.
5255 28. dnsdb lookups can now access SRV records.
5257 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5258 the configuration file.
5260 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5261 (-v) mode. This makes the output for a verbose queue run more intelligible.
5263 31. Added a use_postmaster feature to recipient callouts.
5265 32. Added the $body_zerocount variable, containing the number of binary zero
5266 bytes in the message body.
5268 33. The time of last modification of the "new" subdirectory is now used as the
5269 "mailbox time last read" when there is a quota error for a maildir
5272 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5274 35. Added +ignore_unknown as a special item in host lists.
5276 36. Code for decoding IPv6 addresses in host lists is now included, even if
5277 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5278 address was recognized as an IP address, but was then not correctly decoded
5279 into binary, causing unexpected and incorrect effects when compared with
5286 1. Very minor rewording of debugging text in manualroute to say "list of
5287 hosts" instead of "hostlist".
5289 2. If verify=header_syntax was set, and a header line with an unqualified
5290 address (no domain) and a large number of spaces between the end of the
5291 name and the colon was received, the reception process suffered a buffer
5292 overflow, and (when I tested it) crashed. This was caused by some obsolete
5293 code that should have been removed. The fix is to remove it!
5295 3. When running in the test harness, delay a bit after writing a bounce
5296 message to get a bit more predictability in the log output.
5298 4. Added a call to search_tidyup() just before forking a reception process. In
5299 theory, someone could use a lookup in the expansion of smtp_accept_max_
5300 per_host which, without the tidyup, could leave open a database connection.
5302 5. Added the variables $recipient_data and $sender_data which get set from a
5303 lookup success in an ACL "recipients" or "senders" condition, or a router
5304 "senders" option, similar to $domain_data and $local_part_data.
5306 6. Moved the writing of debug_print from before to after the "senders" test
5309 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5310 problems for message scanning, either using a data ACL, or using
5311 local_scan() because the Received: header was not generated till after they
5312 were called (in order to set the time as the time of reception completion).
5313 I have revised the way this works. The header is now generated after the
5314 body is received, but before the ACL or local_scan() are called. After they
5315 are run, the timestamp in the header is updated.
5321 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5322 before starting a queue runner without re-exec. This happened only when
5323 deliver_drop_privilege was set or when the Exim user was set to root. The
5324 effect of the bug was that timeouts during subsequent deliveries caused
5325 crashes instead of being properly handled. The handler is now left at its
5326 default (and expected) setting.
5328 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5329 message, again when deliver_drop_privilege is set or Exim is run as root.
5330 The bug described in (1) was not present in this case, but the tidying up
5331 of the other signals was missing. I have made the two cases consistent.
5333 3. The ignore_target_hosts setting on a manualroute router was being ignored
5334 for hosts that were looked up using the /MX notation.
5336 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5339 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5340 operated on the sender address. After changing the $sender_address to <>
5341 for the sender address verify, Exim was re-instated it as the original
5342 (before rewriting) address, but remembering that it had rewritten it, so it
5343 wasn't rewriting it again. This bug also had the effect of breaking the
5344 sender address verification caching when the sender address was rewritten.
5346 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5347 This has been changed so that if the ip literal address matches
5348 ignore_target_hosts, the router declines.
5350 7. Added expansion conditions match_domain, match_address, and match_local_
5351 part (NOT match_host).
5353 8. The placeholder for the Received: header didn't have a length field set.
5355 9. Added code to Exim itself and to exim_lock to test for a specific race
5356 condition that could lead to file corruption when using MBX delivery. The
5357 issue is with the lockfile that is created in /tmp. If this file is removed
5358 after a process has opened it but before that process has acquired a lock,
5359 there is the potential for a second process to recreate the file and also
5360 acquire a lock. This could lead to two Exim processes writing to the file
5361 at the same time. The added code performs the same test as UW imapd; it
5362 checks after acquiring the lock that its file descriptor still refers to
5363 the same named file.
5365 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5366 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5369 11. Added the smtp_active_hostname option. If used, this will typically be made
5370 to depend on the incoming interface address. Because $interface_address is
5371 not set up until the daemon has forked a reception process, error responses
5372 that can happen earlier (such as "too many connections") no longer contain
5375 12. If an expansion in a condition on a "warn" statement fails because a lookup
5376 defers, the "warn" statement is abandoned, and the next ACL statement is
5377 processed. Previously this caused the whole ACL to be aborted.
5379 13. Added the iplsearch lookup type.
5381 14. Added ident_timeout as a log selector.
5383 15. Added tls_certificate_verified as a log selector.
5385 16. Added a global option tls_require_ciphers (compare the smtp transport
5386 option of the same name). This controls incoming TLS connections.
5388 17. I finally figured out how to make tls_require_ciphers do a similar thing
5389 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5390 before starting the TLS session.
5392 18. Tabs are now shown as \t in -bP output.
5394 19. If the log selector return_path_on_delivery was set, Exim crashed when
5395 bouncing a message because it had too many Received: header lines.
5397 20. If two routers both had headers_remove settings, and the first one included
5398 a superfluous trailing colon, the final name in the first list and the
5399 first name in the second list were incorrectly joined into one item (with a
5400 colon in the middle).
5406 1. Added -C and -D options to the exinext utility, mainly to make it easier
5407 to include in the automated testing, but these could be helpful when
5408 multiple configurations are in use.
5410 2. The exinext utility was not formatting the output nicely when there was
5411 an alternate port involved in the retry record key, nor when there was a
5412 message id as well (for retries that were specific to a specific message
5413 and a specific host). It was also confused by IPv6 addresses, because of
5414 the additional colons they contain. I have fixed the IPv4 problem, and
5415 patched it up to do a reasonable job for IPv6.
5417 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5418 delivery, the log line now contains "pipelined" if PIPELINING was used.
5420 4. An SMTP transport process used to panic and die if the bind() call to set
5421 an explicit outgoing interface failed. This has been changed; it is now
5422 treated in the same way as a connect() failure.
5424 5. A reference to $sender_host_name in the part of a conditional expansion
5425 that was being skipped was still causing a DNS lookup. This no longer
5428 6. The def: expansion condition was not recognizing references to header lines
5429 that used bh_ and bheader_.
5431 7. Added the _cache feature to named lists.
5433 8. The code for checking quota_filecount in the appendfile transport was
5434 allowing one more file than it should have been.
5436 9. For compatibility with Sendmail, the command line option
5444 and sets the incoming protocol and host name (for trusted callers). The
5445 host name and its colon can be omitted when only the protocol is to be set.
5446 Note the Exim already has two private options, -pd and -ps, that refer to
5447 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5448 "s", but I don't think that's a major issue.
5450 10. A number of refactoring changes to the code, none of which should affect
5453 (a) The number of logging options was getting close to filling up the
5454 32-bit word that was used as a bit map. I have split them into two classes:
5455 those that are passed in the argument to log_write(), and those that are
5456 only ever tested independently outside of that function. These are now in
5457 separate 32-bit words, so there is plenty of room for expansion again.
5458 There is no change in the user interface or the logging behaviour.
5460 (b) When building, for example, log lines, the code previously used a
5461 macro that called string_cat() twice, in order to add two strings. This is
5462 not really sufficiently general. Furthermore, there was one instance where
5463 it was actually wrong because one of the argument was used twice, and in
5464 one call a function was used. (As it happened, calling the function twice
5465 did not affect the overall behaviour.) The macro has been replaced by a
5466 function that can join an arbitrary number of extra strings onto a growing
5469 (c) The code for expansion conditions now uses a table and a binary chop
5470 instead of a serial search (which was left over from when there were very
5471 few conditions). Also, it now recognizes conditions like "pam" even when
5472 the relevant support is not compiled in: a suitably worded error message is
5473 given if an attempt is made to use such a condition.
5475 11. Added ${time_interval:xxxxx}.
5477 12. A bug was causing one of the ddress fields not to be passed back correctly
5478 from remote delivery subprocesses. The field in question was not being
5479 subsequently used, so this caused to problems in practice.
5481 13. Added new log selectors queue_time and deliver_time.
5483 14. Might have fixed a bug in maildirsizefile handling that threw up
5484 "unexpected character" debug warnings, and recalculated the data
5485 unnecessarily. In any case, I expanded the warning message to give more
5488 15. Added the message "Restricted characters in address" to the statements in
5489 the default ACL that block characters like @ and % in local parts.
5491 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5492 Three changes have been made:
5494 (a) There was a serious bug; a negative response to MAIL caused the whole
5495 recipient domain to be cached as invalid, thereby blocking all messages
5496 to all local parts at the same domain, from all senders. This bug has
5497 been fixed. The domain is no longer cached after a negative response to
5498 MAIL if the sender used is not empty.
5500 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5503 (c) A new callout option, "use_sender" has been added for people who want
5504 the modified behaviour.
5510 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5513 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5514 indeed breaks things for older releases.
5516 3. Added additional logging to the case where there is a problem reading data
5517 from a filter that is running in a subprocess using a pipe, in order to
5518 try to track down a specific problem.
5520 4. Testing facility fudge: when running in the test harness and attempting
5521 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5522 getting "No route to host". Convert this to a timeout.
5524 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5527 6. Some OS don't have socklen_t but use size_t instead. This affects the
5528 fifth argument of getsockopt() amongst other things. This is now
5529 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5530 can be set for individual OS. I have set it for SunOS5, OSF1, and
5531 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5532 some earlier ones do not.
5534 7. Change 4.30/15 was not doing the test caselessly.
5536 8. The standard form for an IPv6 address literal was being rejected by address
5537 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5538 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5539 this, as well as the form without the "IPv6" on the front (but only when
5540 address literals are enabled, of course).
5542 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5544 10. Exim crashed if a message with an empty sender address specified by -f
5545 encountered a router with an errors_to setting. This could be provoked only
5546 by a command such as
5550 where an empty string was supplied; "<>" did not hit this bug.
5552 11. Installed PCRE release 4.5.
5554 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5555 remained set. It is now erased.
5557 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5558 times from message ids (which are base 36 rather than the normal 62).
5560 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5561 were being counted as actual protocol errors, and logged if the log
5562 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5563 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5564 and DATA following a set of rejected RCPTs do not count as protocol errors.
5565 In other words, Exim assumes they were pipelined, though this may not
5566 actually be the case. Of course, in all cases the client gets an
5567 appropriate error code.
5569 15. If a lookup fails in an ACL condition, a message about the failure may
5570 be available; it is used if testing the ACL cannot continue, because most
5571 such messages specify what the cause of the deferral is. However, some
5572 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5573 that caused an old message to be retained and used if a later statement
5574 caused a defer, replacing the real cause of the deferral.
5576 16. If an IP address had so many PTR records that the DNS lookup buffer
5577 was not large enough to hold them, Exim could crash while trying to process
5578 the truncated data. It now detects and logs this case.
5580 17. Further to 4.21/58, another change has been made: if (and only if) the
5581 first line of a message (the first header line) ends with CRLF, a bare LF
5582 in a subsequent header line has a space inserted after it, so as not to
5583 terminate the header.
5585 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5586 unnecessarily, used atoi() instead of strtol(), and didn't check the
5587 termination when getting file sizes from file names by regex.
5589 19. Completely re-implemented the support for maildirsize files, in the light
5590 of a number of problems with the previous contributed implementation
5591 (4.30/29). In particular:
5593 . If the quota is zero, the maildirsize file is maintained, but no quota is
5596 . If the maildir directory does not exist, it is created before any attempt
5597 to write a maildirsize file.
5599 . The quota value in the file is just a cache; if the quota is changed in
5600 the transport, the new value overrides.
5602 . A regular expression is available for excluding directories from the
5605 20. The autoreply transport checks the characters in options that define the
5606 message's headers; it allows continued headers, but it was checking with
5607 isspace() after an embedded newline instead of explicitly looking for a
5610 21. If all the "regular" hosts to which an address was routed had passed their
5611 expiry times, and had not reached their retry times, the address was
5612 bounced, even if fallback hosts were defined. Now Exim should go on to try
5615 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5616 equivalent code in the SMTP transport. Some hosts send humungous responses
5617 to HELO/EHLO, more than 1024 it seems.
5619 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5620 gives compiler warnings in some environments. I've now done it "properly",
5623 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5624 (because of problems with the built-in one) was declared to return uschar *
5625 instead of char *, causing compiler failure.
5627 25. Fixed a file descriptor leak when processing alias/forward files.
5629 26. Fixed a minor format string issue in dbfn.c.
5631 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5633 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5634 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5637 29. When a sender address is verified, it is cached, to save repeating the test
5638 when there is more than one recipient in a message. However, when the
5639 verification involves a callout, it is possible for different callout
5640 options to be set for different recipients. It is too complicated to keep
5641 track of this in the cache, so now Exim always runs a verification when a
5642 callout is required, relying on the callout cache for the optimization.
5643 The overhead is duplication of the address routing, but this should not be
5646 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5647 to be verified with callout=postmaster, and the main callout worked but the
5648 postmaster check failed, the verification correctly failed. However, if a
5649 subsequent RCPT command asked for sender verification *without* the
5650 postmaster check, incorrect caching caused this verification also to fail,
5653 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5654 it was not caching the DNS options (qualify_single, search_parents) that
5655 were used when the lookup failed. A subsequent lookup with different
5656 options therefore always gave the same answer, though there were cases
5657 where it should not have. (Example: a "domains = !$mx_any" option on a
5658 dnslookup router: the "domains" option is always processed without any
5659 widening, but the router might have qualify_single set.) Now Exim uses the
5660 cached value only when the same options are set.
5662 32. Added John Jetmore's "exipick" utility to the distribution.
5664 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5665 than a timeout (e.g. a certificate is required, and is not provided), an
5666 Exim server now closes the connection immediately. Previously it waited for
5667 the client to close - but if the client is SSL, it seems that they each
5668 wait for each other, leading to a delay before one of them times out.
5670 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5671 maintained 0.8.x compatibility because I don't think many are using it, and
5672 it is clearly obsolete.
5674 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5677 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5678 client certificate was expired. A simple patch fixes this, though I don't
5679 understand the full logic of why the verify callback is called multiple
5682 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5683 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5684 which causes problems with some clients (such as the Certicom SSL Plus
5685 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5686 disables the coutermeasure allowing Eudora to connect."
5688 38. Exim was not checking that a write() to a log file succeeded. This could
5689 lead to Bad Things if a log got too big, in particular if it hit a file
5690 size limit. Exim now panics and dies if it cannot write to a log file, just
5691 as it does if it cannot open a log file.
5693 39. Modified OS/Makefile-Linux so that it now contains
5695 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5697 The two -D definitions ensure that Exim is compiled with large file
5698 support, which makes it possible to handle log files that are bigger than
5701 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5702 instance) a domain was checked against a named list that involved a lookup,
5703 causing $domain_data to be set, then another domain was checked against the
5704 same list, then the first domain was re-checked, the value of $domain_data
5705 after the final check could be wrong. In particular, if the second check
5706 failed, it could be set empty. This bug probably also applied to
5709 41. The strip_trailing_dot option was not being applied to the address given
5710 with the -f command-line option.
5712 42. The code for reading a message's header from the spool was incrementing
5713 $received_count, but never initializing it. This meant that the value was
5714 incorrect (doubled) while delivering a message in the same process in which
5715 it was received. In the most common configuration of Exim, this never
5716 happens - a fresh exec is done - but it can happen when
5717 deliver_drop_privilege is set.
5719 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5720 it now includes up to 150 characters of the unexpected data in the log
5723 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5724 and building data strings. The size of both of these buffers was 10 000
5725 bytes - far larger than anybody would *ever* want, thought I. Needless to
5726 say, somebody hit the limit. I have increased the maximum line length to
5727 20 000 and the maximum data length of concatenated lines to 100 000. I have
5728 also fixed two bugs, because there was no checking on these buffers. Tsk,
5729 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5730 buffer is too small.
5732 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5733 lsearch lookups. Now it does.
5735 46. When parsing a route_list item in a manualroute router, a fixed-length
5736 buffer was used for the list of hosts. I made this 1024 bytes long,
5737 thinking that nobody would ever have a list of hosts that long. Wrong.
5738 Somebody had a whole pile of complicated expansion conditions, and the
5739 string was silently truncated, leading to an expansion error. It turns out
5740 that it is easier to change to an unlimited length (owing to other changes
5741 that have happened since this code was originally written) than to build
5742 structure for giving a limitation error. The length of the item that
5743 expands into the list of hosts is now unlimited.
5745 47. The lsearch lookup could not handle data where the length of text line was
5746 more than 4095 characters. Such lines were truncated, leading to shortened
5747 data being returned. It should now handle lines of any length.
5749 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5750 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5753 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5754 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5755 no longer happens in comment lines. A list of replacements is now placed
5756 at the head of all of the source files, except those whose only change is
5757 to replace PERL_COMMAND in the very first #! line.
5759 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5760 messages on the queue, with a bottom-up merge sort, using code contributed
5761 by Michael Haardt. This should make operations like -bp somewhat faster on
5762 large queues. It won't affect queue runners, except when queue_run_in_order
5765 51. Installed eximstats 1.31 in the distribution.
5767 52. Added support for SRV lookups to the dnslookup router.
5769 53. If an ACL referred to $message_body or $message_body_end, the value was not
5770 reset for any messages that followed in the same SMTP session.
5772 54. The store-handling optimization for building very long strings was not
5773 differentiating between the different store pools. I don't think this
5774 actually made any difference in practice, but I've tidied it.
5776 55. While running the routers to verify a sender address, $sender_address
5777 was still set to the sender address. This is wrong, because when routing to
5778 send a bounce to the sender, it would be empty. Therefore, I have changed
5779 it so that, while verifying a sender address, $sender_address is set to <>.
5780 (There is no change to what happens when verifying a recipient address.)
5782 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5783 target A or AAAA records (if not already returned) without resetting the
5784 qualify_single or search_parents options of the DNS resolver. These are
5785 inappropriate in this case because the targets of MX and SRV records must
5786 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5787 target that, when qualified, matched something in the local domain. These
5788 two options are now turned off when doing these lookups.
5790 57. It seems that at least some releases of Reiserfs (which does not have the
5791 concept of a fixed number of inodes) returns zero and not -1 for the
5792 number of available inodes. This interacted badly with check_spool_inodes,
5793 which assumed that -1 was the "no such thing" setting. What I have done is
5794 to check that the total number of inodes is greater than zero before doing
5795 the test of how many are available.
5797 58. When a "warn" ACL statement has a log_message modifier, the message is
5798 remembered, and not repeated. This is to avoid a lot of repetition when a
5799 message has many recipients that cause the same warning to be written.
5800 However, Exim was preserving the list of already written lines for an
5801 entire SMTP session, which doesn't seem right. The memory is now reset if a
5802 new message is started.
5804 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5805 debugging output unless log_rewrite was also set.
5807 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5808 of (int)(handle) when we know that handle contains (void *)(-1).
5810 61. The Exim daemon panic-logs an error return when it closes the incoming
5811 connection. However "connection reset by peer" seems to be common, and
5812 isn't really an error worthy of noting specially, so that particular error
5815 62. When Exim is trying to find all the local interfaces, it used to panic and
5816 die if the ioctl to get the interface flags failed. However, it seems that
5817 on at least one OS (Solaris 9) it is possible to have an interface that is
5818 included in the list of interfaces, but for which you get a failure error
5819 for this call. This happens when the interface is not "plumbed" into a
5820 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5821 failure of the "get flags" call assumes that the interface is down.
5823 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5824 makes life easier for people who are doing arithmetic on fields extracted
5825 from dates, where you often get leading zeros that should not be
5826 interpreted as octal.
5828 64. Added qualify_domain to the redirect router, to override the global
5831 65. If a pathologically long header line contained very many addresses (the
5832 report of this problem mentioned 10 000) and each of them was rewritten,
5833 Exim could use up a very large amount of memory. (It kept on making new
5834 copies of the header line as it rewrote, and never released the old ones.)
5835 At the expense of a bit more processing, the header rewriting function has
5836 been changed so that it no longer eats memory in this way.
5838 66. The generation of the Received: header has been moved from the time that a
5839 message starts to be received, to the time that it finishes. The timestamp
5840 in the Received: header should now be very close to that of the <= log
5841 line. There are two side-effects of this change:
5843 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5844 logged header lines no longer include the local Received: line, because
5845 it has not yet been created. The same applies to a copy of the message
5846 that is returned to a non-SMTP sender when a message is rejected.
5848 (b) When a filter file is tested using -bf, no additional Received: header
5849 is added to the test message. After some thought, I decided that this
5852 This change does not affect the value of $received_for. It is still set
5853 after address rewriting, but before local_scan() is called.
5855 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5857 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5858 gave an unhelpful panic error message, and a defer error. I have managed to
5859 change this behaviour so that it now rejects any supplied certificate,
5860 which seems right, as the list of acceptable certificates is empty.
5862 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5863 gave an unhelpful defer error. I have not managed to make this reject any
5864 supplied certificates, but the error message it gives is "no certificate
5865 supplied", which is not helpful.
5867 70. exigrep's output now also includes lines that are not associated with any
5868 message, but which match the given pattern. Implemented by a patch from
5869 Martin Sluka, which also tidied up the Perl a bit.
5871 71. Recipient callout verification, like sender verification, was using <> in
5872 the MAIL FROM command. This isn't really the right thing, since the actual
5873 sender may affect whether the remote host accepts the recipient or not. I
5874 have changed it to use the actual sender in the callout; this means that
5875 the cache record is now keyed on a recipient/sender pair, not just the
5876 recipient address. There doesn't seem to be a real danger of callout loops,
5877 since a callout by the remote host to check the sender would use <>.
5878 [SEE ABOVE: changed after hitting problems.]
5880 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5881 temporary errors. However, in the case of such a code being given after
5882 the end of a data transmission (i.e. after ".") Exim was failing to write
5883 a retry record for the message. (Yes, there was some broken host that was
5884 actually sending 8xx at this point.)
5886 73. An unknown lookup type in a host list could cause Exim to panic-die when
5887 the list was checked. (An example that provoked this was putting <; in the
5888 middle of a list instead of at the start.) If this happened during a DATA
5889 ACL check, a -D file could be left lying around. This kind of configuration
5890 error no longer causes Exim to die; instead it causes a defer error. The
5891 incident is still logged to the main and panic logs.
5893 74. Buglet left over from Exim 3 conversion. The message "too many messages
5894 in one connection" was written to the rejectlog but not the mainlog, except
5895 when address rewriting (yes!) was being logged.
5897 75. Added write_rejectlog option.
5899 76. When a system filter was run not as root (that is, when system_filter_user
5900 was set), the values of the $n variables were not being returned to the
5901 main process; thus, they were not subsequently available in the $sn
5904 77. Added +return_path_on_delivery log selector.
5906 78. A connection timeout was being treated differently from recipients deferred
5907 when testing hosts_max_try with a message that was older than the host's
5908 retry timeout. (The host should not be counted, thus allowing all hosts to
5909 be tried at least once before bouncing.) This may have been the cause of an
5910 occasionally reported bug whereby a message would remain on the queue
5911 longer than the retry timeout, but would be bounced if a delivery was
5912 forced. I say "may" because I never totally pinned down the problem;
5913 setting up timeout/retry tests is difficult. See also the next item.
5915 79. The ultimate address timeout was not being applied to errors that involved
5916 a combination of host plus message (for example, a timeout on a MAIL
5917 command). When an address resolved to a number of possible hosts, and they
5918 were not all tried for each delivery (e.g. because of hosts_max_try), a
5919 message could remain on the queue longer than the retry timeout.
5921 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5924 81. Fixed an obscure SMTP outgoing bug which required at least the following
5925 conditions: (a) there was another message waiting for the same server;
5926 (b) the server returned 5xx to all RCPT commands in the first message so
5927 that the message was not completed; (c) the server dropped the connection
5928 or gave a negative response to the RSET that Exim sends to abort the
5929 transaction. The observed case was a dropped connection after DATA that had
5930 been sent in pipelining mode. That is, the server had advertised PIPELINING
5931 but was not implementing it correctly. The effect of the bug was incorrect
5932 behaviour, such as trying another host, and this could lead to a crash.
5938 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5939 and daemon.c were passed as pointers to ints; they should have been
5940 pointers to socklen_t variables (which are typically unsigned ints).
5942 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5945 3. Fixed a really odd bug that affected only the testing scheme; patching a
5946 certain fixed string in the binary changed the value of another string that
5947 happened to be identical to the end of the original first string.
5949 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5950 name", it returns that address as the IP address. On some operating
5951 systems (e.g. Solaris), it also passes back the IP address string as the
5952 "host name". However, on others (e.g. Linux), it passes back an empty
5953 string. Exim wasn't checking for this, and was changing the host name to an
5954 empty string, assuming it had been canonicalized.
5956 5. Although rare, it is permitted to have more than one PTR record for a given
5957 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5958 all the names associated with an address, because they do in Solaris.
5959 However, it seems that they do not in Linux for data that comes from the
5960 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5961 I found this out when I moved to a new Linux workstation and tried to run
5962 the Exim test suite.
5964 To get round this problem I have changed the code so that it now does its
5965 own call to the DNS to look up PTR records when searching for a host name.
5966 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5967 addresses that are only in /etc/hosts are still found.
5969 This behaviour is, however, controlled by an option called host_lookup_
5970 order, which defaults to "bydns:byaddr". If people want to use the other
5971 order, or indeed, just use one or the other means of lookup, they can
5972 specify it in this variable.
5974 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5975 some operating systems, this comes back from gethostbyaddr() as an empty
5976 string, and this is what Exim used to test for. However, it seems that in
5977 other systems, "." is yielded. Exim now tests for this case too.
5979 7. The values of check_spool_space and check_log_space are now held internally
5980 as a number of kilobytes instead of an absolute number of bytes. If a
5981 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5982 kilobyte. This means that much larger values can be stored.
5984 8. Exim monitor: an attempt to get the action menu when not actually pointing
5985 at a message produces an empty menu entitled "No message selected". This
5986 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5987 no entries in it ("Shell widget menu has zero width and/or height"). So I
5988 have added a single, blank menu entry in this case.
5990 9. Added ${quote_local_part.
5992 10. MIME decoding is now applied to the contents of Subject: header lines when
5995 11. Now that a reference to $sender_host_address automatically causes a reverse
5996 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5997 host lookup before query-style lookups in lists that might use this
5998 variable. This has therefore been abolished, and the "net-" prefix is no
5999 longer necessary for query-style lookups.
6001 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6002 have been a typo for LFLAGS, so it has been changed.
6004 13. The install script calls Exim with "-C /dev/null" in order to find the
6005 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6006 to be output. However, since Exim outputs its version number before the
6007 error, it didn't break the script. It just looked ugly. I fixed this by
6008 always allowing "-C /dev/null" if the caller is root.
6010 14. Ignore overlarge ACL variable number when reading spool file - insurance
6011 against a later release with more variables having written the file.
6013 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6014 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6015 this, as well as the form without the "IPv6" on the front.
6017 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6018 OS/Makefile-Darwin file.
6020 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6021 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6023 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6024 variable. However, some OS use ints for inodes. I've added cast to long int
6025 to get rid of the compiler warning.
6027 19. I had forgotten to lock out "/../" in configuration file names when
6028 ALT_CONFIG_PREFIX was set.
6030 20. Routers used for verification do not need to specify transports. However,
6031 if such a router generated a host list, and callout was configured, Exim
6032 crashed, because it could not find a port number from the (non-existent)
6033 transport. It now assumes port 25 in this circumstance.
6035 21. Added the -t option to exigrep.
6037 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6038 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6039 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6040 them is set, LOOKUP_LSEARCH is forced.
6042 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6044 24. Added sender and host information to the "rejected by local_scan()" log
6045 line; previously there was no indication of these.
6047 25. Added .include_if_exists.
6049 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6050 Linux. It turns out that not all file systems support this. Apparently some
6051 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6052 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6053 not supported on the file descriptor, is now ignored when Exim is trying to
6054 sync a directory. This applies only to Linux.
6056 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6058 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6059 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6062 29. Added support for maildirsize files from supplied patch (modified a bit).
6064 30. The use of :fail: followed by an empty string could lead Exim to respond to
6065 sender verification failures with (e.g.):
6067 550 Verification failed for <xxx>
6068 550 Sender verify failed
6070 where the first response line was missing the '-' that indicates it is not
6071 the final line of the response.
6073 31. The loop for finding the name of the user that called Exim had a hardwired
6074 limit of 10; it now uses the value of finduser_retries, which is used for
6075 all other user lookups.
6077 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6080 33. Exim was neglecting to zero errno before one call of strtol() when
6081 expanding a string and expecting an integer value. On some systems this
6082 resulted in spurious "integer overflow" errors. Also, it was casting the
6083 result into an int without checking.
6085 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6086 did not work. The code looks as if it has *never* worked, though it appears
6087 to have been documented since at least release 1.62. I have made it work.
6089 35. The "timeout_DNS" error in retry rules, also documented since at least
6090 1.62, also never worked. As it isn't clear exactly what this means, and
6091 clearly it isn't a major issue, I have abolished the feature by treating it
6092 as "timeout", and writing a warning to the main and panic logs.
6094 36. The display of retry rules for -brt wasn't always showing the error code
6097 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6098 timeout_connect_A, timeout_connect_MX.
6100 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6101 to the empty sender.
6103 39. The daemon was not analysing the content of -oX till after it had closed
6104 stderr and disconnected from the controlling terminal. This meant that any
6105 syntax errors were only noted on the panic log, and the return code from
6106 the command was 0. By re-arranging the code a little, I've made the
6107 decoding happen first, so such errors now appear on stderr, and the return
6108 code is 1. However, the actual setting up of the sockets still happens in
6109 the disconnected process, so errors there are still only recorded on the
6112 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6113 connections (as happens on some IP stacks) was logged at start up time as
6114 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6115 it from "IPv6 and IPv4", which means that two separate sockets are being
6118 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6119 says whether AF_INET or AF_INET6 was passed as an argument.
6121 42. Exiwhat output was messed up when time zones were included in log
6124 43. Exiwhat now gives more information about the daemon's listening ports,
6125 and whether -tls-on-connect was used.
6127 44. The "port" option of the smtp transport is now expanded.
6129 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6130 silently ignored. Now an error message is written to the main and panic
6133 46. There's a new ACL modifier called "logwrite" which writes to a log file
6134 as soon as it is encountered.
6136 47. Added $local_user_uid and $local_user_gid at routing time.
6138 48. Exim crashed when trying to verify a sender address that was being
6141 49. Exim was recognizing only a space character after ".include". It now also
6142 recognizes a tab character.
6144 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6145 extracting the relevant information from the specification. The man page no
6146 longer contains scrambled data for the -d option, and I've added a section
6147 at the front about calling Exim under different names.
6149 51. Added "extra_headers" argument to the "mail" command in filter files.
6151 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6154 53. Installed eximstats 1.29.
6156 54. Added transport_filter_timeout as a generic transport option.
6158 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6159 Cc: header lines. This was required by RFC 822, but it not required by RFC
6162 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6163 incoming messages that did not have them. Now it does so only if the
6164 message originates locally, that is, if there is no associated remote host
6165 address. When Resent- header lines are present, this applies to the Resent-
6166 lines rather than the non-Resent- lines.
6168 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6169 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6171 58. Messages for configuration errors now include the name of the main
6172 configuration file - useful now that there may be more than one file in a
6173 list (.included file names were always shown).
6175 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6176 for those rare installations that do not start the daemon as root or run it
6177 setuid root. I've cut out the call to initgroups() if the daemon is not
6180 60. The Exim user and group can now be bound into the binary as text strings
6181 that are looked up at the start of Exim's processing.
6183 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6185 62. Added $mailstore_basename variable.
6187 63. Installed patch to sieve.c from Michael Haardt.
6189 64. When Exim failed to open the panic log after failing to open the main log,
6190 the original message it was trying to log was written to stderr and debug
6191 output, but if they were not available (the usual case in production), it
6192 was lost. Now it is written to syslog before the two lines that record the
6193 failures to open the logs.
6195 65. Users' Exim filters run in subprocesses under the user's uid. It is
6196 possible for a "deliver" command or an alias in a "personal" command to
6197 provoke an address rewrite. If logging of address rewriting is configured,
6198 this fails because the process is not running as root or exim. There may be
6199 a better way of dealing with this, but for the moment (because 4.30 needs
6200 to be released), I have disabled address rewrite logging when running a
6201 filter in a non-root, non-exim process.
6207 1. The buildconfig auxiliary program wasn't quoting the value set for
6208 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6209 not defined. This bug was masked in 4.22 by the effect that was fixed in
6212 2. Some messages that were rejected after a message id was allocated were
6213 shown as "incomplete" by exigrep. It no longer does this for messages that
6214 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6216 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6217 have allow_domain_literals set, the ID did not get logged in the <= line.
6218 Domain literals are now always recognized in Message-ID: header lines.
6220 4. The first argument for a ${extract expansion item is the key name or field
6221 number. Leading and trailing spaces in this item were not being ignored,
6222 causing some misleading effects.
6224 5. When deliver_drop_privilege was set, single queue runner processes started
6225 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6226 same command in the process it spins off) were not dropping privilege.
6228 6. When the daemon running as "exim" started a queue runner, it always
6229 re-executed Exim in the spun-off process. This is a waste of effort when
6230 deliver_drop_privilege is set. The new process now just calls the
6231 queue-runner function directly.
6237 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6240 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6241 ignored. Though the use of -oP was forcing the writing of a pid file, it
6242 was always written to the default place.
6244 3. If the message "no IP address found for host xxxx" is generated during
6245 incoming verification, it is now followed by identification of the incoming
6246 connection (so you can more easily find what provoked it).
6248 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6250 5. Added some features to "harden" Exim a bit more against certain attacks:
6252 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6253 be put in Local/Makefile. This is like the never_users runtime option,
6254 but it cannot be overridden. The default setting is "root".
6256 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6257 prefix string with which any file named in a -C command line option
6260 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6261 is retained for -C and -D only if the caller of Exim is root. Without
6262 it, the exim user may also use -C and -D and retain privilege.
6264 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6265 command line option is disabled.
6267 6. Macro names set by the -D option must start with an upper case letter, just
6268 like macro names defined in the configuration file.
6270 7. Added "dereference=" facility to LDAP.
6272 8. Two instances of the typo "uknown" in the source files are fixed.
6274 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6275 the Configure-Makefile script screwed up while processing it.
6277 10. Incorporated PCRE 4.4.
6279 11. The SMTP synchronization check was not operating right at the start of an
6280 SMTP session. For example, it could not catch a HELO sent before the client
6281 waited for the greeting. There is now a check for outstanding input at the
6282 point when the greeting is written. Because of the duplex, asynchronous
6283 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6284 way, but not yet received, when the check is performed.
6286 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6287 on TCP/IP sockets, because this apparently causes some broken clients to
6290 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6291 unchanged) from the Cygwin maintainer.
6293 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6294 was supported instead of testing for mbx. Effectively a typo.
6296 15. The spa authenticator server code was not checking that the input it
6297 received was valid base64.
6299 16. The debug output line for the "set" modifier in ACLs was not showing the
6300 name of the variable that was being set.
6302 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6304 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6305 lookup on its own. Something else was needed to trigger the lookup. For
6306 example, a match in host_lookup or the need for a host name in a host list.
6307 Now, if $sender_host_name is referenced and the host name has not yet been
6308 looked up, a lookup is performed. If the lookup fails, the variable remains
6309 empty, and $host_lookup_failed is set to "1".
6311 19. Added "eqi" as a case-independent comparison operator.
6313 20. The saslauthd authentication condition could segfault if neither service
6314 nor realm was specified.
6316 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6317 error message that was logged was misleading, and incoming SMTP
6318 connections were dropped. The message is now more accurate, and temporary
6319 errors are given to SMTP connections.
6321 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6322 (except RSET) with a 421 error, until QUIT is received. However, it was
6323 failing to send a response to QUIT.
6325 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6326 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6327 ACL is now run after the helo_try_verify_hosts code.
6329 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6330 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6331 case-independent, so other case variants are also recognized). Apparently
6332 some systems use these upper case variants.
6334 25. If more than two messages were waiting for the same host, and a transport
6335 filter was specified for the transport, Exim sent two messages over the
6336 same TCP/IP connection, and then failed with "socket operation on non-
6337 socket" when it tried to send the third.
6339 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6341 27. The extern definition of crypt16() in expand.c was not being excluded when
6342 the OS had its own crypt16() function.
6344 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6345 as a preferred synonym for return_size_limit, both as an option and as an
6348 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6350 30. Changed the default configuration ACL to relax the local part checking rule
6351 for addresses that are not in any local domains. For these addresses,
6352 slashes and pipe symbols are allowed within local parts, but the sequence
6353 /../ is explicitly forbidden.
6355 31. SPA server authentication was not clearing the challenge buffer before
6358 32. log_message in a "warn" ACL statement was writing to the reject log as
6359 well as to the main log, which contradicts the documentation and doesn't
6360 seem right (because no rejection is happening). So I have stopped it.
6362 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6363 However, I am unable to do any testing of this.
6365 34. Fixed an infelicity in the appendfile transport. When checking directories
6366 for a mailbox, to see if any needed to be created, it was accidentally
6367 using path names with one or more superfluous leading slashes; tracing
6368 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6370 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6371 contents are added to the log line that is written for every discarded
6372 recipient. (Previously a log_message setting was ignored.)
6374 36. The ${quote: operator now quotes the string if it is empty.
6376 37. The install script runs exim in order to find its version number. If for
6377 some reason other than non-existence or emptiness, which it checks, it
6378 could not run './exim', it was installing it with an empty version number,
6379 i.e. as "exim-". This error state is now caught, and the installation is
6382 38. An argument was missing from the function that creates an error message
6383 when Exim fails to connect to the socket for saslauthd authentication.
6384 This could cause Exim to crash, or give a corrupted message.
6386 39. Added isip, isip4, and isip6 to ${if conditions.
6388 40. The ACL variables $acl_xx are now saved with the message, and can be
6389 accessed later in routers, transports, and filters.
6391 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6392 strings in the file are not string-expanded.
6394 42. If a MAIL command specified a SIZE value that was too large to fit into an
6395 int variable, the check against message_size_limit failed. Such values are
6396 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6397 day this will have to be increased, but I don't think I want to be around
6398 when emails are that large.
6405 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6406 iconv() is not standard in FreeBSD.
6408 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6409 IPv6 enabled. The observed symptom was a segmentation fault on return from
6410 the function os_common_find_running_interfaces() in src/os.c.
6412 3. In the check_special_case() function in daemon.c I had used "errno" as an
6413 argument name, which causes warnings on some systems. This was basically a
6414 typo, since it was named "eno" in the comments!
6416 4. The code that waits for the clock to tick (at a resolution of some fraction
6417 of a second) so as to ensure message-id uniqueness was always waiting for
6418 at least one whole tick, when it could have waited for less. [This is
6419 almost certainly not relevant at current processor speeds, where it is
6420 unlikely to ever wait at all. But we try to future-proof.]
6422 5. The function that sleeps for a time interval that includes fractions of a
6423 second contained a race. It did not block SIGALRM between setting the
6424 timer, and suspending (a couple of lines later). If the interval was short
6425 and the sigsuspend() was delayed until after it had expired, the suspension
6426 never ended. On busy systems this could lead to processes getting stuck for
6429 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6430 process, before it forks any delivery processes. The open lookup caching
6431 mechanism meant that the open file or database connection was passed into
6432 the delivery process. The problem was that delivery processes always tidy
6433 up cached lookup data. This could cause a problem for the next delivery
6434 process started by the queue runner, because the external queue runner
6435 process does not know about the closure. So the next delivery process
6436 still has data in the lookup cache. In the case of a file lookup, there was
6437 no problem because closing a file descriptor in a subprocess doesn't affect
6438 the parent. However, if the lookup was caching a connection to a database,
6439 the connection was closed, and the second delivery process was likely to
6440 see errors such as "PGSQL: query failed: server closed the connection
6441 unexpectedly". The problem has been fixed by closing all cached lookups
6442 in a queue runner before running a delivery process.
6444 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6445 seem to have the "const" qualifier which it has on other OS. I've
6448 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6449 *of the same type* (client or server) with the same public name that an
6450 error should be diagnosed.
6452 9. When Exim looked up a host name for an IP address, but failed to find the
6453 original IP address when looking up the host name (a safety check), it
6454 output the message "<ip address> does not match any IP for NULL", which was
6455 confusing, to say the least. The bug was that the host name should have
6456 appeared instead of "NULL".
6458 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6459 user that is built into the binary, and the -C or -D options is used, root
6460 privilege is dropped before the configuration file is read. In addition,
6461 logging is switched to stderr instead of the normal log files. If the
6462 configuration then re-defines the Exim user, the unprivileged environment
6463 is probably not what is expected, so Exim logs a panic warning message (but
6466 However, if deliver_drop_privilege is set, the unprivileged state may well
6467 be exactly what is intended, so the warning has been cut out in that case,
6468 and Exim is allowed to try to write to its normal log files.
6474 1. smtp_return_error_details was not giving details for temporary sender
6475 or receiver verification errors.
6477 2. Diagnose a configuration error if two authenticators have the same public
6480 3. Exim used not to create the message log file for a message until the first
6481 delivery attempt. This could be confusing when incoming messages were held
6482 for policy or load reasons. The message log file is now created at the time
6483 the message is received, and an initial "Received" line is written to it.
6485 4. The automatically generated man page for command line options had a minor
6486 bug that caused no ill effects; however, a more serious problem was that
6487 the procedure for building the man page automatically didn't always
6488 operate. Consequently, release 4.20 contains an out-of-date version. This
6489 shouldn't happen again.
6491 5. When building Exim with embedded Perl support, the script that builds the
6492 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6493 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6495 6. The freeze_tell option was not being used for messages that were frozen on
6496 arrival, either by an ACL or by local_scan().
6498 7. Added the smtp_incomplete_transaction log selector.
6500 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6501 was accepting AUTH without a new EHLO.
6503 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6504 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6507 10. Logging of TCP/IP connections (when configured) now happens in the main
6508 daemon process instead of the child process, so that the TCP/IP connection
6509 count is more accurate (but it can never be perfect).
6511 11. The use of "drop" in a nested ACL was not being handled correctly in the
6512 outer ACL. Now, if condition failure induced by the nested "drop" causes
6513 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6514 or "require"), the connection is dropped.
6516 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6517 that yield "discard" can now be used with an "accept" or a "discard" verb,
6518 but an error is generated for any others (because I can't see a useful way
6519 to define what should happen).
6521 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6522 are now processed in the same way as lines in the Exim configuration file.
6523 In particular, continuation lines are supported.
6525 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6527 15. Added -ti meaning -t -i.
6529 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6530 domains, and warn by logging if others are found.
6532 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6533 returned from GIFCONF when Exim is trying to find the list of interfaces on
6534 a host. The code in os.c has been modified to copy each ifreq to an aligned
6535 structure in all cases.
6537 Also, in some cases, the returned ifreq's were being copied to a 'struct
6538 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6539 means the last couple of bytes of an IPv6 address could be chopped if the
6540 ifreq contained only a normal sockaddr (14 bytes storage).
6542 18. Named domain lists were not supported in the hosts_treat_as_local option.
6543 An entry such as +xxxx was not recognized, and was treated as a literal
6546 19. Ensure that header lines added by a DATA ACL are included in the reject log
6547 if the ACL subsequently rejects the message.
6549 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6550 MD5 (which is deprecated).
6552 21. When testing a filter file using -bf, Exim was writing a message when it
6553 took the sender from a "From " line in the message, but it was not doing so
6554 when it took $return_path from a Return-Path: header line. It now does.
6556 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6557 with a valid header line field name (a series of printing characters
6558 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6560 23. Changed "disc" in the source to "disk" to conform to the documentation and
6561 the book and for uniformity.
6563 24. Ignore Sendmail's -Ooption=value command line item.
6565 25. When execve() failed while trying to run a command in a pipe transport,
6566 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6567 could be confused with a return value of 69 from the command itself. This
6568 has been changed to 127, the value the shell returns if it is asked to run
6569 a non-existent command. The wording for the related log line suggests a
6570 non-existent command as the problem.
6572 26. If received_header_text expands to an empty string, do not add a Received:
6573 header line to the message. (Well, it adds a token one on the spool, but
6574 marks it "old" so that it doesn't get used or transmitted.)
6576 27. Installed eximstats 1.28 (addition of -nt option).
6578 28. There was no check for failure on the call to getsockname() in the daemon
6579 code. This can fail if there is a shortage of resources on the system, with
6580 ENOMEM, for example. A temporary error is now given on failure.
6582 29. Contrary to the C standard, it seems that in some environments, the
6583 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6584 program. Exim now does this explicitly; it affects the formatting of
6585 timestamps using strftime().
6587 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6588 complaints. I've now initialized all the variables, to avoid this.
6590 32. Header lines added by a system filter were not being "seen" during
6591 transport-time rewrites.
6593 33. The info_callback() function passed to OpenSSL is set up with type void
6594 (*)(SSL *, int, int), as described somewhere. However, when calling the
6595 function (actually a macro) that sets it up, the type void(*)() is
6596 expected. I've put in a cast to prevent warnings from picky compilers.
6598 34. If a DNS black list lookup found a CNAME record, but there were no A
6599 records associated with the domain it pointed at, Exim crashed.
6601 35. If a DNS black list lookup returned more than one A record, Exim ignored
6602 all but the first. It now scans all returned addresses if a particular IP
6603 value is being sought. In this situation, the contents of the
6604 $dnslist_value variable are a list of all the addresses, separated by a
6607 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6608 to accept a host name and all its aliases if the forward lookup for any of
6609 them yielded the IP address of the incoming connection. Now it accepts only
6610 those names whose forward lookup yields the correct IP address. Any other
6611 names are discarded. This closes a loophole whereby a rogue DNS
6612 administrator could create reverse DNS records to break through a
6613 wildcarded host restriction in an ACL.
6615 37. If a user filter or a system filter that ran in a subprocess used any of
6616 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6617 the wrong values were passed to the pipe command ($thisaddress had the
6618 value of $0, $0 had the value of $1, etc). This bug was introduced by
6619 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6621 38. Improved the line breaking for long SMTP error messages from ACLs.
6622 Previously, if there was no break point between 40 and 75 characters, Exim
6623 left the rest of the message alone. Two changes have been made: (a) I've
6624 reduced the minimum length to 35 characters; (b) if it can't find a break
6625 point between 35 and 75 characters, it looks ahead and uses the first one
6626 that it finds. This may give the occasional overlong line, but at least the
6627 remaining text gets split now.
6629 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6630 file descriptors might be low, and that setting 1000 would always raise it.
6631 It turns out that in some environments, the limit is already over 1000 and
6632 that lowering it causes trouble. So now Exim takes care not to decrease it.
6634 40. When delivering a message, the value of $return_path is set to $sender_
6635 address at the start of routing (routers may change the value). By an
6636 oversight, this default was not being set up when an address was tested by
6637 -bt or -bv, which affected the outcome if any router or filter referred to
6640 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6641 log only when "message" or "log_message" are set. However, if one of the
6642 conditions was an address verification, or a call to a nested ACL, the
6643 messages generated by the underlying test were being passed through. This
6644 no longer happens. The underlying message is available in $acl_verify_
6645 message for both "message" and "log_message" expansions, so it can be
6646 passed through if needed.
6648 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6649 new expansion $bh_ to give the encoded byte string without charset
6650 translation. Translation happens only if iconv() is available; HAVE_ICONV
6651 indicates this at build time. HEADERS_CHARSET gives the charset to
6652 translate to; headers_charset can change it in the configuration, and
6653 "headers charset" can change it in an individual filter file.
6655 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6656 that creates RFC 2047 encoded "words" labels them as that charset instead
6657 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6658 expansion operator; (ii) when Exim creates a From: line for a local
6659 message; (iii) when a header line is rewritten to include a "phrase" part.
6661 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6662 buggy, causing it to skip the first lines of messages whose message ID
6663 ended in 'D'. This would not have bitten before Exim release 4.14, because
6664 message IDs were unlikely to end in 'D' before then. The effect was to have
6665 incorrect size information for certain domains.
6667 45. #include "config.h" was missing at the start of the crypt16.c module. This
6668 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6671 46. If there was a timeout during a "random" callout check, Exim treated it as
6672 a failure of the random address, and carried on sending RSET and the real
6673 address. If the delay was just some slowness somewhere, the response to the
6674 original RCPT would be taken as a response to RSET and so on, causing
6675 mayhem of various kinds.
6677 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6678 when I implemented it. It didn't allow for the fact that some option values
6679 may legitimately be negative (e.g. size_addition), and it didn't even do
6680 the right test for positive values.
6682 48. Domain names in DNS records are case-independent. Exim always looks them up
6683 in lower case. Some resolvers return domain names in exactly the case they
6684 appear in the zone file, that is, they may contain uppercase letters. Not
6685 all resolvers do this - some return always lower case. Exim was treating a
6686 change of case by a resolver as a change of domain, similar to a widening
6687 of a domain abbreviation. This triggered its re-routing code and so it was
6688 trying to route what was effectively the same domain again. This normally
6689 caused routing to fail (because the router wouldn't handle the domain
6690 twice). Now Exim checks for this case specially, and just changes the
6691 casing of the domain that it ultimately uses when it transmits the message
6694 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6697 50. If a filter generated a file delivery with a non-absolute name (possible if
6698 no home directory exists for the router), the forbid_file option was not
6701 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6702 the existing equality matching.
6704 52. Exim was using ints instead of ino_t variables in some places where it was
6705 dealing with inode numbers.
6707 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6708 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6709 called TMPDIR, and if it finds it is different, it changes its value.
6711 54. The smtp_printf() function is now made available to local_scan() so
6712 additional output lines can be written before returning. There is also an
6713 smtp_fflush() function to enable the detection of a dropped connection.
6714 The variables smtp_input and smtp_batched_input are exported to
6717 55. Changed the default runtime configuration: the message "Unknown user"
6718 has been removed from the ACL, and instead placed on the localuser router,
6719 using the cannot_route_message feature. This means that any verification
6720 failures that generate their own messages won't get overridden. Similarly,
6721 the "Unrouteable address" message that was in the ACL for unverifiable
6722 relay addresses has also been removed.
6724 56. Added hosts_avoid_esmtp to the smtp transport.
6726 57. The exicyclog script was not checking for the esoteric option
6727 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6728 will work only if exicyclog is run under the appropriate euid.
6730 58. Following a discussion on the list, the rules by which Exim recognises line
6731 endings on incoming messages have been changed. The -dropcr and drop_cr
6732 options are now no-ops, retained only for backwards compatibility. The
6733 following line terminators are recognized: LF CRLF CR. However, special
6734 processing applies to CR:
6736 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6737 nor a local message in the state where . is a terminator.
6739 (ii) If a bare CR is encountered in a header line, an extra space is added
6740 after the line terminator so as not to end the header. The reasoning
6741 behind this is that bare CRs in header lines are most likely either
6742 to be mistakes, or people trying to play silly games.
6744 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6745 was being incorrectly given as 18 bytes larger than it should have been.
6746 This is a VOB (very old bug).
6748 60. This may never have affected anything current, but just in case it has:
6749 When the local host is found other than at the start of a list of hosts,
6750 the local host, those with the same MX, and any that follow, are discarded.
6751 When the list in question was part of a longer list of hosts, the following
6752 hosts (not currently being processed) were also being discarded. This no
6753 longer happens. I'm not sure if this situation could ever has previously
6756 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6759 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6760 header. This is something that is recommended in a new Internet Draft, and
6761 is something that is documented as being done by Sendmail. There are two
6762 possible values. For messages generated by the autoreply transport, Exim
6765 Auto-Submitted: auto-replied
6767 whereas for all other generated messages (e.g. bounces) it adds
6769 Auto-Submitted: auto-generated
6771 63. The "personal" condition in filters now includes a test for the
6772 Auto-Submitted: header. If it contains the string "auto-" the message it
6773 not considered personal.
6775 64. Added rcpt_include_affixes as a generic transport option.
6777 65. Added queue_only_override (default true).
6779 66. Added the syslog_duplication option.
6781 67. If what should have been the first header line of a message consisted of
6782 a space followed by a colon, Exim was mis-interpreting it as a header line.
6783 It isn't of course - it is syntactically invalid and should therefore be
6784 treated as the start of the message body. The misbehaviour could have
6785 caused a number of strange effects, including loss of data in subsequent
6786 header lines, and spool format errors.
6788 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6789 client host had authenticated. This control can now be exercised by an ACL
6790 for more flexibility.
6792 69. By default, callouts do not happen when testing with -bh. There is now a
6793 variant, -bhc, which does actually run the callout code, including
6794 consulting and updating the callout cache.
6796 70. Added support for saslauthd authentication, courtesy of Alexander
6799 71. If statvfs() failed on the spool or log directories while checking their
6800 size for availability, Exim confusingly gave the error "space shortage".
6801 Furthermore, in debugging mode it crashed with a floating point exception.
6802 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6803 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6804 serious problem, Exim now writes to the main and panic logs when this
6805 happens, with details of the failure. It then refuses to accept the
6806 incoming message, giving the message "spool directory problem" or "log
6807 directory problem" with a 421 code for SMTP messages.
6809 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6810 0, 1, and 2 exist, because some OS complain for execs without them (see
6811 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6812 descriptors. However, the code omitted to check that the open succeeded,
6813 causing mysterious errors if for some reason the permissions on /dev/null
6814 got screwed. Now Exim writes a message to the main and panic logs, and
6815 bombs out if it can't open /dev/null.
6817 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6818 interact so that it is all more flexible. It is supposed to remain
6819 backwards compatible. Also added extra_local_interfaces.
6821 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6822 to bomb out with an assertion failure - to the client this appears as a
6823 connection drop. This problem occurs in the part of the code that was taken
6824 from the Samba project. Fortunately, the assertion is in a very simple
6825 function, so I have fixed this by reproducing the function inline in the
6826 one place where it is called, and arranging for authentication to fail
6827 instead of killing the process with assert().
6829 75. The SPA client code was not working when the server requested OEM rather
6830 than Unicode encoding.
6832 76. Added code to make require_files with a specific uid setting more usable in
6833 the case where statting the file as root fails - usually a non-root-mounted
6834 NFS file system. When this happens and the failure is EACCES, Exim now
6835 forks a subprocess and does the per-uid checking as the relevant uid.
6837 77. Added process_log_path.
6839 78. If log_file_path was not explicitly set, a setting of check_log_space or
6840 check_log_inodes was ignored.
6842 79. If a space check for the spool or log partitions fails, the incident is now
6843 logged. Of course, in the latter case the data may get lost...
6845 80. Added the %p formatting code to string_format() so that it can be used to
6846 print addresses in debug_print(). Adjusted all the address printing in the
6847 debugging in store.c to use %p rather than %d.
6849 81. There was a concern that a line of code in smtp_in.c could overflow a
6850 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6851 initially expressed, the concern was not well-founded, because trailing
6852 spaces are removed early. However, if the trailing spaces were followed by
6853 a NULL, they did not get removed, so the overflow was possible. Two fixes
6856 (a) I re-wrote the offending code in a cleaner fashion.
6857 (b) If an incoming SMTP command contains a NULL character, it is rejected
6860 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6861 runs initgroups(), so that if the Exim user is in any additional groups,
6862 they will be used during message reception.
6868 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob