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.
60 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
61 than -2003 did; needs libidn2 in addition to libidn.
63 JH/02 The path option on a pipe transport is now expanded before use.
65 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
66 Patch provided by "Björn", documentation fix added too.
68 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
69 missing a wire-to-host endian conversion.
71 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
72 close after a BDAT command line could be taken as a following command,
73 giving a synch failure. Fix by only checking for synch immediately
74 before acknowledging the chunk.
76 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
77 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
78 macro. Patches provided by Josh Soref.
80 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
81 Previously we did not; the RFC seems ambiguous and VRFY is not listed
82 by IANA as a service extension. However, John Klensin suggests that we
85 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
86 the dkim code may be unix-mode line endings rather than smtp wire-format
87 CRLF, so prepend a CR to any bare LF.
89 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
90 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
92 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
93 the first were themselves being wrongly included in the feed into dkim
94 processing; with most chunk sizes in use this resulted in an incorrect
95 body hash calculated value.
97 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
98 DKIM signature block, for verification. Although advised against by
99 standards it is specifically not ruled illegal.
101 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
103 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
104 missing a body hash (the bh= tag).
106 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
107 It seems that HAProxy sends the Proxy Protocol information in clear and
108 only then does a TLS startup, so do the same.
110 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
111 TCP connections (such as for Spamd) unless the daemon successfully set
112 Fast Open mode on its listening sockets. This fixes breakage seen on
113 too-old kernels or those not configured for Fast Open, at the cost of
114 requiring both directions being enabled for TFO, and TFO never being used
115 by non-daemon-related Exim processes.
117 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
118 endings, at least on the first header line. Try to canonify any that get
119 past that check, despite the cost.
121 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
122 now limited to an arbitrary five deep, while parsing addresses with the
123 strip_excess_angle_brackets option enabled.
125 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
126 instead leave the unprompted TLS handshake in socket buffer for the
127 TLS library to consume.
129 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
131 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
133 JH/16 Drop variables when they go out of scope. Memory management drops a whole
134 region in one operation, for speed, and this leaves assigned pointers
135 dangling. Add checks run only under the testsuite which checks all
136 variables at a store-reset and panics on a dangling pointer; add code
137 explicitly nulling out all the variables discovered. Fixes one known
138 bug: a transport crash, where a dangling pointer for $sending_ip_address
139 originally assigned in a verify callout, is re-used.
141 PP/06 Drop '.' from @INC in various Perl scripts.
143 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
145 PP/08 Reduce a number of compilation warnings under clang; building with
146 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
147 should be warning-free.
149 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
151 HS/01 Fix portability problems introduced by PP/08 for platforms where
152 realloc(NULL) is not equivalent to malloc() [SunOS et al].
154 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
155 chunk. This allows us to accept broken chunked messages. We need a more
156 general solution here.
158 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
159 already-broken messages in the queue.
161 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
163 JH/19 Fix reference counting bug in routing-generated-address tracking.
169 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
170 supports it and a size is available (ie. the sending peer gave us one).
172 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
173 years of being deprecated). The replacements are the ACLs
174 acl_smtp_mime and acl_not_smtp_mime.
176 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
177 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
178 or even an in-clear connection were permitted. Now, if the host lookup
179 was dnssec and dane was requested then the host is only used if the
180 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
181 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
182 if one fails this test.
183 This means that a poorly-configured remote DNS will make it incommunicado;
184 but it protects against a DNS-interception attack on it.
186 JH/04 Bug 1810: make continued-use of an open smtp transport connection
187 non-noisy when a race steals the message being considered.
189 JH/05 If main configuration option tls_certificate is unset, generate a
190 self-signed certificate for inbound TLS connections.
192 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
193 in rewrites and routers.
195 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
196 and logged a warning sing 4.83; now they are a configuration file error.
198 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
199 (lacking @domain). Apply the same qualification processing as RCPT.
201 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
203 JH/10 Support ${sha256:} applied to a string (as well as the previous
206 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
207 a cutthrough deliver is pending, as we always want to make a connection.
208 This also avoids re-routing the message when later placing the cutthrough
209 connection after a verify cache hit.
210 Do not update it with the verify result either.
212 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
213 when routing results in more than one destination address.
215 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
216 signing (which inhibits the cutthrough capability). Previously only
217 the presence of an option was tested; now an expansion evaluating as
218 empty is permissible (obviously it should depend only on data available
219 when the cutthrough connection is made).
221 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
222 the relevant preceding SMTP command did not note the pipelining mode.
224 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
225 Previously they were not counted.
227 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
228 as one having no matching records. Previously we deferred the message
229 that needed the lookup.
231 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
232 distinguished as "(=".
234 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
235 for missing MX records. Previously it only worked for missing A records.
237 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
239 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
240 after the data-go-ahead and data-ack. Patch from Jason Betts.
242 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
243 even for a "none" policy. Patch from Tony Meyer.
245 JH/22 Fix continued use of a connection for further deliveries. If a port was
246 specified by a router, it must also match for the delivery to be
249 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
250 When one of the recipients of a message was unsuitable for the connection
251 (has no matching addresses), we lost track of needing to mark it
252 deferred. As a result mail would be lost.
254 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
256 JH/25 Decoding ACL controls is now done using a binary search; the source code
257 takes up less space and should be simpler to maintain. Merge the ACL
258 condition decode tables also, with similar effect.
260 JH/26 Fix problem with one_time used on a redirect router which returned the
261 parent address unchanged. A retry would see the parent address marked as
262 delivered, so not attempt the (identical) child. As a result mail would
265 JH/27 Fix a possible security hole, wherein a process operating with the Exim
266 UID can gain a root shell. Credit to http://www.halfdog.net/ for
267 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
270 JH/28 Enable {spool,log} filesystem space and inode checks as default.
271 Main config options check_{log,spool}_{inodes,space} are now
272 100 inodes, 10MB unless set otherwise in the configuration.
274 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
275 Previously it only applied to the main-section connection policy
278 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
280 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
281 by me. Added RFC7919 DH primes as an alternative.
283 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
284 are not in the system include path.
286 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
287 GnuTLS, when a session startup failed (eg because the client disconnected)
288 Exim did stdio operations after fclose. This was exposed by a recent
289 change which nulled out the file handle after the fclose.
291 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
292 signed directly by the cert-signing cert, rather than an intermediate
293 OCSP-signing cert. This is the model used by LetsEncrypt.
295 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
297 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
298 an incoming connection.
300 HS/02 Bug 1802: Do not half-close the connection after sending a request
303 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
304 fallback to "prime256v1".
306 JH/34 SECURITY: Use proper copy of DATA command in error message.
307 Could leak key material. Remotely exploitable. CVE-2016-9963.
313 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
314 and 3.4.4 - once the server is enabled to respond to an OCSP request
315 it does even when not requested, resulting in a stapling non-aware
316 client dropping the TLS connection.
318 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
319 support variable-length bit vectors. No functional change.
321 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
322 The I= interface field on outgoing lines is now after the H= remote
323 host field, same as incoming lines. There is a separate
324 outgoing_interface log selector which allows you to disable the
327 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
328 If not running log_selector +smtp_connection the mainlog would be held
329 open indefinitely after a "too many connections" event, including to a
330 deleted file after a log rotate. Leave the per net connection logging
331 leaving it open for efficiency as that will be quickly detected by the
332 check on the next write.
334 HS/01 Bug 1671: Fix post transport crash.
335 Processing the wait-<transport> messages could crash the delivery
336 process if the message IDs didn't exist for some reason. When
337 using 'split_spool_directory=yes' the construction of the spool
338 file name failed already, exposing the same netto behaviour.
340 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
341 mime_regex ACL conditions.
343 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
344 to DSN fail messages (bounces): remote IP, remote greeting, remote response
345 to HELO, local diagnostic string.
347 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
348 log line to debug. Even when configured with a tls authenticator many
349 client connections are expected to not authenticate in this way, so
350 an authenticate fail is not an error.
352 HS/02 Add the Exim version string to the process info. This way exiwhat
353 gives some more detail about the running daemon.
355 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
356 matter for fast-change records such as DNSBLs.
358 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
359 retry record, even if constant. There may be multiple transports with
360 different interface settings and the retry behaviour needs to be kept
363 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
365 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
367 JH/10 Bug 840: fix log_defer_output option of pipe transport
369 JH/11 Bug 830: use same host for all RCPTS of a message, even under
370 hosts_randomize. This matters a lot when combined with mua_wrapper.
372 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
373 ${quote_pgsql:<string>} operator.
375 JH/13 Bug 1708: avoid misaligned access in cached lookup.
377 JH/14 Change header file name for freeradius-client. Relevant if compiling
378 with Radius support; from the Gentoo tree and checked under Fedora.
380 JH/15 Bug 1712: Introduce $prdr_requested flag variable
382 JH/16 Bug 1714: Permit an empty string as expansion result for transport
383 option transport_filter, meaning no filtering.
385 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
387 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
388 defaults to "*" (all hosts). The variable is now available when not built
389 with TLS, default unset, mainly to enable keeping the testsuite sane.
390 If a server certificate is not supplied (via tls_certificate) an error is
391 logged, and clients will find TLS connections fail on startup. Presumably
392 they will retry in-clear.
393 Packagers of Exim are strongly encouraged to create a server certificate
394 at installation time.
396 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
397 with the $config_file variable.
399 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
400 in transport context, after the attempt, and per-recipient. The latter type
401 is per host attempted. The event data is the error message, and the errno
402 information encodes the lookup type (A vs. MX) used for the (first) host,
403 and the trailing two digits of the smtp 4xx response.
405 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
406 to write to mainlog (or rejectlog, paniclog) in the window between file
407 creation and permissions/ownership being changed. Particularly affects
408 installations where exicyclog is run as root, rather than exim user;
409 result is that the running daemon panics and dies.
411 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
413 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
414 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
415 "pri" and "weight". Note that the previous implicit priority given by the
416 list order is no longer honoured.
418 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
421 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
422 by defining SUPPORT_SOCKS.
424 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
425 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
426 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
427 variables are renamed to proxy_{local,external}_{address,port}.
429 JH/27 Move Internationalisation support from Experimental to mainline, enabled
430 for a build by defining SUPPORT_I18N
432 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
433 of the query string, and make ${quote_redis:} do that quoting.
435 JH/29 Move Events support from Experimental to mainline, enabled by default
436 and removable for a build by defining DISABLE_EVENT.
438 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
440 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
441 cached by the daemon.
443 JH/32 Move Redis support from Experimental to mainline, enabled for a build
444 by defining LOOKUP_REDIS. The libhiredis library is required.
446 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
447 keys are given for lookup.
449 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
450 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
451 only supported when built with TLS support. The PolarSSL SHA routines
452 are still used when the TLS library is too old for convenient support.
454 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
455 openssl_options), for security. OpenSSL forces this from version 1.1.0
456 server-side so match that on older versions.
458 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
459 allocation for $value could be released as the expansion processing
460 concluded, but leaving the global pointer active for it.
462 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
463 and to use the domains and local_parts ACL conditions.
465 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
466 incorrectly not doubled on cutthrough transmission, hence seen as a
467 body-termination at the receiving system - resulting in truncated mails.
468 Commonly the sender saw a TCP-level error, and retransmitted the message
469 via the normal store-and-forward channel. This could result in duplicates
470 received - but deduplicating mailstores were liable to retain only the
471 initial truncated version.
473 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
475 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
477 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
478 we're in there, support oversigning also; bug 1309.
480 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
482 HS/04 Add support for keep_environment and add_environment options.
484 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
485 either intentional arithmetic overflow during PRNG, or testing config-
488 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
489 delivery resulted in actual delivery. Cancel cutthrough before DATA
492 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
493 rejects a recipient: pass the reject to the originator.
495 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
496 Many were false-positives and ignorable, but it's worth fixing the
499 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
500 for the new environment-manipulation done at startup. Move the routines
501 from being local to tls.c to being global via the os.c file.
503 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
504 an extract embedded as result-arg for a map, the first arg for extract
505 is unavailable so we cannot tell if this is a numbered or keyed
506 extraction. Accept either.
512 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
515 JH/02 The smtp transport option "multi_domain" is now expanded.
517 JH/03 The smtp transport now requests PRDR by default, if the server offers
520 JH/04 Certificate name checking on server certificates, when exim is a client,
521 is now done by default. The transport option tls_verify_cert_hostnames
522 can be used to disable this per-host. The build option
523 EXPERIMENTAL_CERTNAMES is withdrawn.
525 JH/05 The value of the tls_verify_certificates smtp transport and main options
526 default to the word "system" to access the system default CA bundle.
527 For GnuTLS, only version 3.0.20 or later.
529 JH/06 Verification of the server certificate for a TLS connection is now tried
530 (but not required) by default. The verification status is now logged by
531 default, for both outbound TLS and client-certificate supplying inbound
534 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
537 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
538 Status Notification (bounce) messages are now MIME format per RFC 3464.
539 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
540 under the control of the dsn_advertise_hosts option, and routers may
541 have a dsn_lasthop option.
543 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
544 default, modifiable by a malware= option. The list separator for
545 the options can now be changed in the usual way. Bug 68.
547 JH/10 The smtp_receive_timeout main option is now expanded before use.
549 JH/11 The incoming_interface log option now also enables logging of the
550 local interface on delivery outgoing connections.
552 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
553 if the interface and destination host and port all match.
555 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
558 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
559 Patch from Andrew Lewis.
561 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
562 now supports optional time-restrictions, weighting, and priority
563 modifiers per server. Patch originally by <rommer@active.by>.
565 JH/16 The spamd_address main option now supports a mixed list of local
566 and remote servers. Remote servers can be IPv6 addresses, and
567 specify a port-range.
569 JH/17 Bug 68: The spamd_address main option now supports an optional
570 timeout value per server.
572 JH/18 Bug 1581: Router and transport options headers_add/remove can
573 now have the list separator specified.
575 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
578 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
581 JH/21 Support for the A6 type of dns record is withdrawn.
583 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
584 rather than the verbs used.
586 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
587 from 255 to 1024 chars.
589 JH/24 Verification callouts now attempt to use TLS by default.
591 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
592 are generic router options now. The defaults didn't change.
594 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
595 Original patch from Alexander Shikoff, worked over by JH.
597 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
598 files if ZCAT_COMMAND is not executable.
600 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
602 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
604 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
605 Normally benign, it bites when the pair was led to by a CNAME;
606 modern usage is to not canonicalize the domain to a CNAME target
607 (and we were inconsistent anyway for A-only vs AAAA+A).
609 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
611 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
612 when evaluating $sender_host_dnssec.
614 JH/31 Check the HELO verification lookup for DNSSEC, adding new
615 $sender_helo_dnssec variable.
617 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
619 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
621 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
623 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
624 documented as working, but never had. Support all but $spam_report.
626 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
627 added for tls authenticator.
629 HS/03 Add perl_taintmode main config option
635 TL/01 When running the test suite, the README says that variables such as
636 no_msglog_check are global and can be placed anywhere in a specific
637 test's script, however it was observed that placement needed to be near
638 the beginning for it to behave that way. Changed the runtest perl
639 script to read through the entire script once to detect and set these
640 variables, reset to the beginning of the script, and then run through
641 the script parsing/test process like normal.
643 TL/02 The BSD's have an arc4random API. One of the functions to induce
644 adding randomness was arc4random_stir(), but it has been removed in
645 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
646 function when detected.
648 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
649 cause callback expansion.
651 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
652 syntax errors in an expansion can be treated as a string instead of
653 logging or causing an error, due to the internal use of bool_lax
654 instead of bool when processing it.
656 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
657 server certificates when making smtp deliveries.
659 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
661 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
663 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
665 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
666 Merged patch from Sebastian Wiedenroth.
668 JH/05 Fix results-pipe from transport process. Several recipients, combined
669 with certificate use, exposed issues where response data items split
670 over buffer boundaries were not parsed properly. This eventually
671 resulted in duplicates being sent. This issue only became common enough
672 to notice due to the introduction of connection certificate information,
673 the item size being so much larger. Found and fixed by Wolfgang Breyha.
675 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
676 size buffer was used, resulting in syntax errors when an expansion
679 JH/07 Add support for directories of certificates when compiled with a GnuTLS
680 version 3.3.6 or later.
682 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
683 is EXPERIMENTAL_EVENT, the main-configuration and transport options
684 both become "event_action", the variables become $event_name, $event_data
685 and $event_defer_errno. There is a new variable $verify_mode, usable in
686 routers, transports and related events. The tls:cert event is now also
687 raised for inbound connections, if the main configuration event_action
690 TL/06 In test suite, disable OCSP for old versions of openssl which contained
691 early OCSP support, but no stapling (appears to be less than 1.0.0).
693 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
694 server certificate names available under the smtp transport option
695 "tls_verify_cert_hostname" now do not permit multi-component wildcard
698 JH/10 Time-related extraction expansions from certificates now use the main
699 option "timezone" setting for output formatting, and are consistent
700 between OpenSSL and GnuTLS compilations. Bug 1541.
702 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
703 encoded parameter in the incoming message. Bug 1558.
705 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
706 include certificate info, eximon was claiming there were spoolfile
709 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
711 JH/14 Log delivery-related information more consistently, using the sequence
712 "H=<name> [<ip>]" wherever possible.
714 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
715 are problematic for Debian distribution, omit them from the release
718 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
720 JH/16 Fix string representation of time values on 64bit time_t architectures.
723 JH/17 Fix a null-indirection in certextract expansions when a nondefault
724 output list separator was used.
729 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
730 checkers that were complaining about end of non-void function with no
733 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
734 This was a regression introduced in 4.83 by another bugfix.
736 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
738 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
739 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
745 TF/01 Correctly close the server side of TLS when forking for delivery.
747 When a message was received over SMTP with TLS, Exim failed to clear up
748 the incoming connection properly after forking off the child process to
749 deliver the message. In some situations the subsequent outgoing
750 delivery connection happened to have the same fd number as the incoming
751 connection previously had. Exim would try to use TLS and fail, logging
752 a "Bad file descriptor" error.
754 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
755 utilities have not been installed.
757 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
758 temporary space as the ACL may create new global variables.
760 TL/01 LDAP support uses per connection or global context settings, depending
761 upon the detected version of the libraries at build time.
763 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
764 to extract and use the src ip:port in logging and expansions as if it
765 were a direct connection from the outside internet. PPv2 support was
766 updated based on HAProxy spec change in May 2014.
768 JH/02 Add ${listextract {number}{list}{success}{fail}}.
770 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
771 Properly escape header and check for NULL return.
773 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
776 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
778 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
779 characters in header names, implemented as a verify condition.
780 Contributed by Michael Fischer v. Mollard.
782 TL/05 Rename SPF condition results err_perm and err_temp to standardized
783 results permerror and temperror. Previous values are deprecated but
784 still accepted. In a future release, err_perm and err_temp will be
785 completely removed, which will be a backward incompatibility if the
786 ACL tests for either of these two old results. Patch contributed by
787 user bes-internal on the mailing list.
789 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
791 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
792 selectors, in both main and reject logs.
794 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
797 JH/07 Add malware type "sock" for talking to simple daemon.
799 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
801 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
802 routers/transports under cutthrough routing.
804 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
805 numbers. Touch up "bool" conditional to keep the same definition.
807 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
809 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
811 JH/12 Expand items in router/transport headers_add or headers_remove lists
812 individually rather than the list as a whole. Bug 1452.
814 Required for reasonable handling of multiple headers_ options when
815 they may be empty; requires that headers_remove items with embedded
816 colons must have them doubled (or the list-separator changed).
818 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
819 view the policy declared in the DMARC record. Currently, $dmarc_status
820 is a combined value of both the record presence and the result of the
823 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
825 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
826 dnslookup router and the smtp transport (applying to the forward
829 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
830 of ldap servers used for a specific lookup. Patch provided by Heiko
833 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
834 New variable $lookup_dnssec_authenticated for observability.
836 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
837 Patch submitted by Lars Timman.
839 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
841 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
842 Requires trusted mode and valid format message id, aborts otherwise.
843 Patch contributed by Heiko Schlichting.
845 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
846 certextract with support for various fields. Bug 1358.
848 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
849 is requested by default, modifiable by smtp transport option
852 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
853 operate on certificate variables to give certificate fingerprints
854 Also new ${sha256:cert_variable}.
856 JH/23 The PRDR feature is moved from being Experimental into the mainline.
858 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
859 Christian Aistleitner.
861 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
863 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
864 file. Patch from Wolfgang Breyha.
866 JH/25 Expand the coverage of the delivery $host and $host_address to
867 client authenticators run in verify callout. Bug 1476.
869 JH/26 Port service names are now accepted for tls_on_connect_ports, to
870 align with daemon_smtp_ports. Bug 72.
872 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
873 support and error reporting did not work properly.
875 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
876 and is readable. Patch from Andrew Colin Kissa.
878 TL/14 Enhance documentation of ${run expansion and how it parses the
879 commandline after expansion, particularly in the case when an
880 unquoted variable expansion results in an empty value.
882 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
884 PP/02 Fix internal collision of T_APL on systems which support RFC3123
885 by renaming away from it. Addresses GH issue 15, reported by
888 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
890 TL/15 SECURITY: prevent double expansion in math comparison functions
891 (can expand unsanitized data). Not remotely exploitable.
898 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
900 PP/02 Make -n do something, by making it not do something.
901 When combined with -bP, the name of an option is not output.
903 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
906 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
907 $sender_host_name and config options to manage this, and basic check
910 PP/05 DSCP support for outbound connections and control modifier for inbound.
912 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
913 (Only plugin which currently uses this is kerberos4, which nobody should
914 be using, but we should make it available and other future plugins might
915 conceivably use it, even though it would break NAT; stuff *should* be
916 using channel bindings instead).
918 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
919 name; added for Sendmail compatibility; requires admin caller.
920 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
921 just ignore it); requires trusted caller.
922 Also parse but ignore: -Ac -Am -X<logfile>
925 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
927 TL/02 Add +smtp_confirmation as a default logging option.
929 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
930 Patch by Magnus Holmgren from 2007-02-20.
932 TL/04 Bugzilla 1281 - Spec typo.
933 Bugzilla 1283 - Spec typo.
934 Bugzilla 1290 - Spec grammar fixes.
936 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
938 TL/06 Add Experimental DMARC support using libopendmarc libraries.
940 TL/07 Fix an out of order global option causing a segfault. Reported to dev
941 mailing list by by Dmitry Isaikin.
943 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
945 JH/02 Support "G" suffix to numbers in ${if comparisons.
947 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
949 NM/01 Bugzilla 1197 - Spec typo
950 Bugzilla 1196 - Spec examples corrections
952 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
954 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
955 gnutls_enable_pkcs11, but renamed to more accurately indicate its
958 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
959 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
961 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
962 "acl {{name}{arg}...}", and optional args on acl condition
965 JH/05 Permit multiple router/transport headers_add/remove lines.
967 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
969 JH/07 Avoid using a waiting database for a single-message-only transport.
970 Performance patch from Paul Fisher. Bugzilla 1262.
972 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
975 JH/09 Add $headers_added variable, with content from use of ACL modifier
976 add_header (but not yet added to the message). Bugzilla 199.
978 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
979 Pulled from Bugzilla 817 by Wolfgang Breyha.
981 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
983 (nb: this is the same fix as in Exim 4.80.1)
985 JH/11 Add A= logging on delivery lines, and a client_set_id option on
988 JH/12 Add optional authenticated_sender logging to A= and a log_selector
991 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
993 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
994 advertise SMTP AUTH mechanism to us, instead of a generic
995 protocol violation error. Also, make Exim more robust to bad
996 data from the Dovecot auth socket.
998 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1000 When a queue runner is handling a message, Exim first routes the
1001 recipient addresses, during which it prunes them based on the retry
1002 hints database. After that it attempts to deliver the message to
1003 any remaining recipients. It then updates the hints database using
1006 So if a recipient address works intermittently, it can get repeatedly
1007 deferred at routing time. The retry hints record remains fresh so the
1008 address never reaches the final cutoff time.
1010 This is a fairly common occurrence when a user is bumping up against
1011 their storage quota. Exim had some logic in its local delivery code
1012 to deal with this. However it did not apply to per-recipient defers
1013 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1015 This change adds a proper retry rule check during routing so that the
1016 final cutoff time is checked against the message's age. We only do
1017 this check if there is an address retry record and there is not a
1018 domain retry record; this implies that previous attempts to handle
1019 the address had the retry_use_local_parts option turned on. We use
1020 this as an approximation for the destination being like a local
1021 delivery, as in LMTP.
1023 I suspect this new check makes the old local delivery cutoff check
1024 redundant, but I have not verified this so I left the code in place.
1026 TF/02 Correct gecos expansion when From: is a prefix of the username.
1028 Test 0254 submits a message to Exim with the header
1032 When I ran the test suite under the user fanf2, Exim expanded
1033 the header to contain my full name, whereas it should have added
1034 a Resent-Sender: header. It erroneously treats any prefix of the
1035 username as equal to the username.
1037 This change corrects that bug.
1039 GF/01 DCC debug and logging tidyup
1040 Error conditions log to paniclog rather than rejectlog.
1041 Debug lines prefixed by "DCC: " to remove any ambiguity.
1043 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1045 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1046 Bug spotted by Jeremy Harris; was flawed since initial commit.
1047 Would have resulted in OCSP responses post-SNI triggering an Exim
1048 NULL dereference and crash.
1050 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1052 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1053 Bug detection, analysis and fix by Samuel Thibault.
1054 Bugzilla 1331, Debian bug #698092.
1056 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1058 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1059 Server implementation by Todd Lyons, client by JH.
1060 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1061 config variable "prdr_enable" controls whether the server
1062 advertises the facility. If the client requests PRDR a new
1063 acl_data_smtp_prdr ACL is called once for each recipient, after
1064 the body content is received and before the acl_smtp_data ACL.
1065 The client is controlled by both of: a hosts_try_prdr option
1066 on the smtp transport, and the server advertisement.
1067 Default client logging of deliveries and rejections involving
1068 PRDR are flagged with the string "PRDR".
1070 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1071 fclose(). Diagnosis by Todd Lyons.
1073 PP/17 Update configure.default to handle IPv6 localhost better.
1074 Patch by Alain Williams (plus minor tweaks).
1077 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1078 This is now consistent with GnuTLS, and is now documented: the
1079 previous undocumented portable approach to treating the option as
1080 unset was to force an expansion failure. That still works, and
1081 an empty string is now equivalent.
1083 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1084 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1085 not performing validation itself.
1087 PP/20 Added force_command boolean option to pipe transport.
1088 Patch from Nick Koston, of cPanel Inc.
1090 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1093 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1095 PP/21 Fix eximon continuous updating with timestamped log-files.
1096 Broken in a format-string cleanup in 4.80, missed when I repaired the
1097 other false fix of the same issue.
1098 Report and fix from Heiko Schlichting.
1101 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1102 Report from Prashanth Katuri.
1104 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1105 It's SecureTransport, so affects any MacOS clients which use the
1106 system-integrated TLS libraries, including email clients.
1108 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1109 using a MIME ACL for non-SMTP local injection.
1110 Report and assistance in diagnosis by Warren Baker.
1112 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1114 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1116 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1117 last id that failed so it may be referenced in subsequent ACL's.
1119 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1122 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1123 ldap library initialization, allowing self-signed CA's to be
1124 used. Also properly sets require_cert option later in code by
1125 using NULL (global ldap config) instead of ldap handle (per
1126 session). Bug diagnosis and testing by alxgomz.
1128 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1129 the src/util/ subdirectory.
1131 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1132 renamed to Transport Post Delivery Action by Jeremy Harris, as
1135 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1136 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1137 redis_servers = needs to be configured which will be used by the redis
1138 lookup. Patch from Warren Baker, of The Packet Hub.
1140 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1142 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1143 hostname or reverse DNS when processing a host list. Used suggestions
1144 from multiple comments on this bug.
1146 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1148 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1149 Missed a few lines, added it to make the runtest require no keyboard
1152 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1153 contains upper case chars. Make router use caseful_local_part.
1155 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1156 support when GnuTLS has been built with p11-kit.
1162 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1164 This, or similar/improved, will also be change PP/11 of 4.82.
1170 PP/01 Handle short writes when writing local log-files.
1171 In practice, only affects FreeBSD (8 onwards).
1172 Bugzilla 1053, with thanks to Dmitry Isaikin.
1174 NM/01 Bugzilla 949 - Documentation tweak
1176 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1179 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1181 PP/02 Implemented gsasl authenticator.
1183 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1185 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1186 `pkg-config foo` for cflags/libs.
1188 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1189 with rest of GSASL and with heimdal_gssapi.
1191 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1192 `pkg-config foo` for cflags/libs for the TLS implementation.
1194 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1195 properties get this fed in as external SSF. A number of robustness
1196 and debugging improvements to the cyrus_sasl authenticator.
1198 PP/08 cyrus_sasl server now expands the server_realm option.
1200 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1201 Patch by Jeremy Harris.
1203 PP/10 Added dbmjz lookup type.
1205 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1207 PP/12 MAIL args handles TAB as well as SP, for better interop with
1208 non-compliant senders.
1209 Analysis and variant patch by Todd Lyons.
1211 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1212 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1213 Patch from Dirk Mueller <dmueller@suse.com>
1215 PP/13 tls_peerdn now print-escaped for spool files.
1216 Observed some $tls_peerdn in wild which contained \n, which resulted
1217 in spool file corruption.
1219 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1220 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1221 or write after TLS renegotiation, which otherwise led to messages
1224 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1225 as a tracking header (ie: a signed header comes before the signature).
1226 Patch from Wolfgang Breyha.
1228 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1229 comma-sep list; embedded commas doubled.
1231 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1233 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1235 Report and patch from Dmitry Banschikov.
1237 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1238 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1239 failures. We appear to now support TLS1.1+ with Exim.
1241 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1242 lets Exim select keys and certificates based upon TLS SNI from client.
1243 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1244 before an outbound SMTP session. New log_selector, +tls_sni.
1246 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1247 NULL dereference. Report and patch from Alun Jones.
1249 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1250 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1251 Not seeing resolver debug output on NetBSD, but suspect this is a
1252 resolver implementation change.
1254 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1255 Left warnings. Added "eximon gdb" invocation mode.
1257 PP/21 Defaulting "accept_8bitmime" to true, not false.
1259 PP/22 Added -bw for inetd wait mode support.
1261 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1262 locate the relevant includes and libraries. Made this the default.
1264 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1265 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1267 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1268 This may cause build issues on older platforms.
1270 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1271 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1272 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1273 Added SNI support via GnuTLS too.
1274 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1276 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1278 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1279 Applied second patch from Janne, implementing suggestion to default
1280 multiple-strings-in-record handling to match SPF spec.
1282 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1284 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1285 read-only, out of scope).
1286 Patch from Wolfgang Breyha, report from Stuart Northfield.
1288 PP/29 Fix three issues highlighted by clang analyser static analysis.
1289 Only crash-plausible issue would require the Cambridge-specific
1290 iplookup router and a misconfiguration.
1291 Report from Marcin Mirosław.
1293 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1295 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1296 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1297 As part of this, removing so much warning spew let me fix some minor
1298 real issues in debug logging.
1300 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1301 assignment on my part. Fixed.
1303 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1304 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1305 Janne Snabb (who went above and beyond: thank you).
1307 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1308 string otherwise requires a connection and a bunch more work and it's
1309 relatively easy to get wrong. Should also expose TLS library linkage
1312 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1313 64-bit ${eval} (JH/03).
1315 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1316 GNU libc to support some of the 64-bit stuff, should not lead to
1317 conflicts. Defined before os.h is pulled in, so if a given platform
1318 needs to override this, it can.
1320 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1321 protection layer was required, which is not implemented.
1322 Bugzilla 1254, patch from Wolfgang Breyha.
1324 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1325 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1326 tls_dhparam take prime identifiers. Also unbreak combination of
1327 OpenSSL+DH_params+TLSSNI.
1329 PP/39 Disable SSLv2 by default in OpenSSL support.
1335 PP/01 Solaris build fix for Oracle's LDAP libraries.
1336 Bugzilla 1109, patch from Stephen Usher.
1338 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1340 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1343 TF/02 Fix a couple more cases where we did not log the error message
1344 when unlink() failed. See also change 4.74-TF/03.
1346 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1347 lock up or crash if it happened to be inside a call to libc when it
1348 got a SIGUSR1 from exiwhat.
1350 The SIGUSR1 handler appends the current process status to the process
1351 log which is later printed by exiwhat. It used to use the general
1352 purpose logging code to do this, but several functions it calls are
1353 not safe for signals.
1355 The new output code in the SIGUSR1 handler is specific to the process
1356 log, and simple enough that it's easy to inspect for signal safety.
1357 Removing some special cases also simplifies the general logging code.
1358 Removing the spurious timestamps from the process log simplifies
1361 TF/04 Improved ratelimit ACL condition.
1363 The /noupdate option has been deprecated in favour of /readonly which
1364 has clearer semantics. The /leaky, /strict, and /readonly update modes
1365 are mutually exclusive. The update mode is no longer included in the
1366 database key; it just determines when the database is updated. (This
1367 means that when you upgrade Exim will forget old rate measurements.)
1369 Exim now checks that the per_* options are used with an update mode that
1370 makes sense for the current ACL. For example, when Exim is processing a
1371 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1372 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1373 must specify per_mail/readonly. If you omit the update mode it defaults to
1374 /leaky where that makes sense (as before) or /readonly where required.
1376 The /noupdate option is now undocumented but still supported for
1377 backwards compatibility. It is equivalent to /readonly except that in
1378 ACLs where /readonly is required you may specify /leaky/noupdate or
1379 /strict/noupdate which are treated the same as /readonly.
1381 A useful new feature is the /count= option. This is a generalization
1382 of the per_byte option, so that you can measure the throughput of other
1383 aggregate values. For example, the per_byte option is now equivalent
1384 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1386 The per_rcpt option has been generalized using the /count= mechanism
1387 (though it's more complicated than the per_byte equivalence). When it is
1388 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1389 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1390 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1391 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1392 Note that using per_rcpt with a non-readonly update mode in more than
1393 one ACL will cause the recipients to be double-counted. (The per_mail
1394 and per_byte options don't have this problem.)
1396 The handling of very low rates has changed slightly. If the computed rate
1397 is less than the event's count (usually one) then this event is the first
1398 after a long gap. In this case the rate is set to the same as this event's
1399 count, so that the first message of a spam run is counted properly.
1401 The major new feature is a mechanism for counting the rate of unique
1402 events. The new per_addr option counts the number of different
1403 recipients that someone has sent messages to in the last time period. It
1404 behaves like per_rcpt if all the recipient addresses are different, but
1405 duplicate recipient addresses do not increase the measured rate. Like
1406 the /count= option this is a general mechanism, so the per_addr option
1407 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1408 example, measure the rate that a client uses different sender addresses
1409 with the options per_mail/unique=$sender_address. There are further
1410 details in the main documentation.
1412 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1414 TF/06 Removed a few PCRE remnants.
1416 TF/07 Automatically extract Exim's version number from tags in the git
1417 repository when doing development or release builds.
1419 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1420 Bugzilla 879. Patch from Paul Fisher.
1422 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1423 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1426 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1428 PP/05 Variable $av_failed, true if the AV scanner deferred.
1429 Bugzilla 1078. Patch from John Horne.
1431 PP/06 Stop make process more reliably on build failure.
1432 Bugzilla 1087. Patch from Heiko Schlittermann.
1434 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1435 Bugzilla 1089. Patch from Heiko Schlittermann.
1437 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1438 Bugzilla 1131. Patch from Holger Weiß.
1440 PP/09 Handle IPv6 addresses with SPF.
1441 Bugzilla 860. Patch from Wolfgang Breyha.
1443 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1445 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1448 PP/11 match_* no longer expand right-hand-side by default.
1449 New compile-time build option, EXPAND_LISTMATCH_RHS.
1450 New expansion conditions, "inlist", "inlisti".
1452 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1454 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1456 PP/14 fix log_write() format string regression from TF/03.
1457 Bugzilla 1152. Patch from Dmitry Isaikin.
1463 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1465 PP/02 Harmonised TLS library version reporting; only show if debugging.
1466 Layout now matches that introduced for other libraries in 4.74 PP/03.
1468 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1470 PP/04 New "dns_use_edns0" global option.
1472 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1475 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1476 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1478 TK/01 Updated PolarSSL code to 0.14.2.
1479 Bugzilla 1097. Patch from Andreas Metzler.
1481 PP/07 Catch divide-by-zero in ${eval:...}.
1482 Fixes bugzilla 1102.
1484 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1487 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1488 format-string attack -- SECURITY: remote arbitrary code execution.
1490 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1491 time unintentionally subject to list matching rules, letting the header
1492 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1493 arbitrary string expansion). This allowed for information disclosure.
1495 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1496 INT_MIN/-1 -- value coerced to INT_MAX.
1502 NM/01 Workaround for PCRE version dependency in version reporting
1505 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1506 This fixes portability to compilers other than gcc, notably
1507 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1509 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1510 makefiles for portability to HP-UX and POSIX correctness.
1512 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1513 Also via indented variable definition in the Makefile.
1514 (Debugging by Oliver Heesakkers).
1516 PP/02 Restore caching of spamd results with expanded spamd_address.
1517 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1519 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1520 Improves build reliability. Fix from: Frank Elsner
1522 NM/02 Fix wide character breakage in the rfc2047 coding
1523 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1525 NM/03 Allow underscore in dnslist lookups
1526 Fixes bug 1026. Patch from Graeme Fowler
1528 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1529 Code patches from Adam Ciarcinski of NetBSD.
1531 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1534 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1535 is logged, to avoid truncation. Patch from John Horne.
1537 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1538 Patch from Jakob Hirsch.
1540 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1541 SQL string expansion failure details.
1542 Patch from Andrey Oktyabrski.
1544 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1545 Patch from Simon Arlott.
1547 PP/09 New lookups functionality failed to compile on old gcc which rejects
1548 extern declarations in function scope.
1549 Patch from Oliver Fleischmann
1551 PP/10 Use sig_atomic_t for flags set from signal handlers.
1552 Check getgroups() return and improve debugging.
1553 Fixed developed for diagnosis in bug 927 (which turned out to be
1556 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1557 Patch from Mark Zealey.
1559 PP/12 Bugzilla 1056: Improved spamd server selection.
1560 Patch from Mark Zealey.
1562 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1563 Based on patch from Heiko Schlittermann.
1565 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1566 Patch from Uwe Doering, sign-off by Michael Haardt.
1568 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1569 variable declaration deep within a block. Bug and patch from
1572 PP/15 lookups-Makefile IRIX compatibility coercion.
1574 PP/16 Make DISABLE_DKIM build knob functional.
1576 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1577 Patch by Simon Arlott
1579 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1580 variable argument macros. Our copy now differs from upstream.
1586 TF/01 Failure to get a lock on a hints database can have serious
1587 consequences so log it to the panic log.
1589 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1590 controlled using the smtp_confirmation log selector.
1592 TF/03 Include the error message when we fail to unlink a spool file.
1594 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1595 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1596 for maintaining out-of-tree patches for some time.
1598 PP/01 Bugzilla 139: Documentation and portability issues.
1599 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1600 Handle per-OS dynamic-module compilation flags.
1602 PP/02 Let /dev/null have normal permissions.
1603 The 4.73 fixes were a little too stringent and complained about the
1604 permissions on /dev/null. Exempt it from some checks.
1605 Reported by Andreas M. Kirchwitz.
1607 PP/03 Report version information for many libraries, including
1608 Exim version information for dynamically loaded libraries. Created
1609 version.h, now support a version extension string for distributors
1610 who patch heavily. Dynamic module ABI change.
1612 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1613 privilege escalation vulnerability whereby the Exim run-time user
1614 can cause root to append content of the attacker's choosing to
1617 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1620 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1621 If dropping privileges for untrusted macros, we disabled normal logging
1622 on the basis that it would fail; for the Exim run-time user, this is not
1623 the case, and it resulted in successful deliveries going unlogged.
1624 Fixed. Reported by Andreas Metzler.
1630 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1631 only prepend for the Resent-* case. Fixes regression introduced in
1632 Exim 4.70 by NM/22 for Bugzilla 607.
1634 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1635 increasing numbers of administrators be bitten by this.
1637 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1639 PP/03 Bugzilla 994: added openssl_options main configuration option.
1641 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1643 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1645 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1647 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1648 without a peer certificate, leading to a segfault because of an
1649 assumption that peers always have certificates. Be a little more
1650 paranoid. Problem reported by Martin Tscholak.
1652 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1653 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1654 NB: ClamAV planning to remove STREAM in "middle of 2010".
1655 CL also introduces -bmalware, various -d+acl logging additions and
1656 more caution in buffer sizes.
1658 PP/09 Implemented reverse_ip expansion operator.
1660 PP/10 Bugzilla 937: provide a "debug" ACL control.
1662 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1664 PP/12 Bugzilla 973: Implement --version.
1666 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1668 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1670 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1672 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1673 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1674 ignore trailing whitespace.
1676 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1678 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1681 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1682 Notification from Dr Andrew Aitchison.
1684 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1685 ExtendedDetectionInfo response format.
1686 Notification from John Horne.
1688 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1691 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1692 XSL and documented dependency on system catalogs, with examples of how
1695 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1698 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1699 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1700 configuration file which is writeable by the Exim user or group.
1702 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1703 of configuration files to cover files specified with the -C option if
1704 they are going to be used with root privileges, not just the default
1707 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1708 option (effectively making it always true).
1710 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1711 files to be used while preserving root privileges.
1713 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1714 that rogue child processes cannot use them.
1716 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1717 run-time user, instead of root.
1719 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1720 Exim run-time user without dropping privileges.
1722 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1723 result string, instead of calling string_vformat() twice with the same
1726 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1727 for other users. Others should always drop root privileges if they use
1728 -C on the command line, even for a whitelisted configure file.
1730 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1732 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1738 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1739 $data_path, and $header_path variables; fixed documentation bugs and
1742 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1743 exipick to access non-standard spools, including the "frozen" queue
1746 NM/01 Bugzilla 965: Support mysql stored procedures.
1747 Patch from Alain Williams
1749 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1751 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1752 Patch from Andreas Metzler
1754 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1755 Patch from Kirill Miazine
1757 NM/05 Bugzilla 671: Added umask to procmail example.
1759 JJ/03 installed exipick 20100323.0, fixing doc bug
1761 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1762 directory. Notification and patch from Dan Rosenberg.
1764 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1766 TK/02 Improve log output when DKIM signing operation fails.
1768 MH/01 Treat the transport option dkim_domain as a colon separated
1769 list, not as a single string, and sign the message with each element,
1770 omitting multiple occurences of the same signer.
1772 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1773 Bugzilla 985, 986. Patch by Simon Arlott
1775 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1776 Patch by Simon Arlott
1778 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1779 MBX locking. Notification from Dan Rosenberg.
1785 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1787 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1789 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1791 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1793 NM/04 Bugzilla 915: Flag broken perl installation during build.
1799 TK/01 Added patch by Johannes Berg that expands the main option
1800 "spamd_address" if it starts with a dollar sign.
1802 TK/02 Write list of recipients to X-Envelope-Sender header when building
1803 the mbox-format spool file for content scanning (suggested by Jakob
1806 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1807 (http://www.dcc-servers.net/) support via dccifd. Activated by
1808 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1810 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1811 by Mark Daniel Reidel <mr@df.eu>.
1813 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1814 When building exim an external PCRE library is now needed -
1815 PCRE is a system library on the majority of modern systems.
1816 See entry on PCRE_LIBS in EDITME file.
1818 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1819 conversation. Added nologin parameter to request.
1820 Patch contributed by Kirill Miazine.
1822 TF/01 Do not log submission mode rewrites if they do not change the address.
1824 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1826 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1827 log files in place. Contributed by Roberto Lima.
1829 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1831 TF/03 Bugzilla 615: When checking the local_parts router precondition
1832 after a local_part_suffix or local_part_prefix option, Exim now
1833 does not use the address's named list lookup cache, since this
1834 contains cached lookups for the whole local part.
1836 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1837 Robert Millan. Documentation is in experimental-spec.txt.
1839 TF/04 Bugzilla 668: Fix parallel build (make -j).
1841 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1843 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1844 Patch provided by Jan Srzednicki.
1846 TF/05 Leading white space used to be stripped from $spam_report which
1847 wrecked the formatting. Now it is preserved.
1849 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1850 that they are available at delivery time.
1852 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1854 TF/08 TLS error reporting now respects the incoming_interface and
1855 incoming_port log selectors.
1857 TF/09 Produce a more useful error message if an SMTP transport's hosts
1858 setting expands to an empty string.
1860 NM/06 Bugzilla 744: EXPN did not work under TLS.
1861 Patch provided by Phil Pennock.
1863 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1864 Patch provided by Richard Godbee.
1866 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1867 acl_smtp_notquit, added index entry.
1869 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1870 Patch provided by Eugene Bujak.
1872 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1873 accept(). Patch provided by Maxim Dounin.
1875 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1876 Patch provided by Phil Pennock.
1878 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1880 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1881 Patch provided by Brad "anomie" Jorsch.
1883 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1884 Patch provided by Dean Brooks.
1886 TK/05 Add native DKIM support (does not depend on external libraries).
1888 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1889 Patch provided by Graeme Fowler.
1891 NM/16 Bugzilla 851: Documentation example syntax fix.
1893 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1895 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1898 NM/19 Bugzilla 745: TLS version reporting.
1899 Patch provided by Phil Pennock.
1901 NM/20 Bugzilla 167: bool: condition support.
1902 Patch provided by Phil Pennock.
1904 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1905 clients. Patch provided by Phil Pennock.
1907 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1908 Patch provided by Brad "anomie" Jorsch.
1910 NM/23 Bugzilla 687: Fix misparses in eximstats.
1911 Patch provided by Heiko Schlittermann.
1913 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1914 Patch provided by Heiko Schlittermann.
1916 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1917 plus update to original patch.
1919 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1921 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1922 Patch provided by David Brownlee.
1924 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1926 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1928 NM/30 Bugzilla 888: TLS documentation bugfixes.
1930 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1932 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1933 Unlike the original bugzilla I have changed all shell scripts in src tree.
1935 NM/33 Bugzilla 898: Transport filter timeout fix.
1936 Patch by Todd Rinaldo.
1938 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1939 Patch by Serge Demonchaux.
1941 NM/35 Bugzilla 39: Base64 decode bug fixes.
1942 Patch by Jakob Hirsch.
1944 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1946 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1948 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1950 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1956 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1957 ALT-N's libdkim that I have put here:
1958 http://duncanthrax.net/exim-experimental/
1960 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1961 were called 'true' and it seems that C99 defines that as a reserved
1962 keyword to be used with 'bool' variable types. That means you could
1963 not include C99-style headers which use bools without triggering
1964 build errors in sieve.c.
1966 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1967 as mailq or other aliases. Changed the --help handling significantly
1968 to do whats expected. exim_usage() emits usage/help information.
1970 SC/01 Added the -bylocaldomain option to eximstats.
1972 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1974 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1976 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1982 PH/01 Another patch from the Sieve maintainer.
1984 PH/02 When an IPv6 address is converted to a string for single-key lookup
1985 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1986 dots are used instead of colons so that keys in lsearch files need not
1987 contain colons. This was done some time before quoting was made available
1988 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1989 (notated using the quote facility) so as to distinguish them from IPv4
1990 keys. This meant that lookups for IP addresses in host lists did not work
1991 for iplsearch lookups.
1993 This has been fixed by arranging for IPv6 addresses to be expressed with
1994 colons if the lookup type is iplsearch. This is not incompatible, because
1995 previously such lookups could never work.
1997 The situation is now rather anomalous, since one *can* have colons in
1998 ordinary lsearch keys. However, making the change in all cases is
1999 incompatible and would probably break a number of configurations.
2001 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2004 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2005 conversion specification without a maximum field width, thereby enabling
2006 a rogue spamd server to cause a buffer overflow. While nobody in their
2007 right mind would setup Exim to query an untrusted spamd server, an
2008 attacker that gains access to a server running spamd could potentially
2009 exploit this vulnerability to run arbitrary code as the Exim user.
2011 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2012 $primary_hostname instead of what libspf2 thinks the hosts name is.
2014 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2015 a directory entry by the name of the lookup key. Previously, if a
2016 symlink pointed to a non-existing file or a file in a directory that
2017 Exim lacked permissions to read, a lookup for a key matching that
2018 symlink would fail. Now it is enough that a matching directory entry
2019 exists, symlink or not. (Bugzilla 503.)
2021 PH/03 The body_linecount and body_zerocount variables are now exported in the
2024 PH/04 Added the $dnslist_matched variable.
2026 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2027 This means they are set thereafter only if the connection becomes
2030 PH/06 Added the client_condition to authenticators so that some can be skipped
2031 by clients under certain conditions.
2033 PH/07 The error message for a badly-placed control=no_multiline_responses left
2034 "_responses" off the end of the name.
2036 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2038 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2039 (without spaces) instead of just copying the configuration text.
2041 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2043 PH/11 Added $max_received_linelength.
2045 PH/12 Added +ignore_defer and +include_defer to host lists.
2047 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2048 way in which PCRE > 7.0 is built.
2050 PH/14 Implemented queue_only_load_latch.
2052 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2053 MAIL command. The effect was to mangle the value on 64-bit systems.
2055 PH/16 Another patch from the Sieve maintainer.
2057 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2059 PH/18 If a system quota error occurred while trying to create the file for
2060 a maildir delivery, the message "Mailbox is full" was not appended to the
2061 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2062 only to a quota excession during the actual writing of the file.
2064 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2065 characters?) which causes problems in log lines. The DN values are now
2066 passed through string_printing() before being added to log lines.
2068 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2069 and InterBase are left for another time.)
2071 PH/21 Added message_body_newlines option.
2073 PH/22 Guard against possible overflow in moan_check_errorcopy().
2075 PH/23 POSIX allows open() to be a macro; guard against that.
2077 PH/24 If the recipient of an error message contained an @ in the local part
2078 (suitably quoted, of course), incorrect values were put in $domain and
2079 $local_part during the evaluation of errors_copy.
2085 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2086 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2089 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2090 issue a MAIL command.
2092 PH/02 In an ACL statement such as
2094 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2096 if a client was not listed at all, or was listed with a value other than
2097 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2098 the condition was not true (as it should be), so access was not denied.
2099 The bug was that the ! inversion was incorrectly passed on to the second
2100 item. This has been fixed.
2102 PH/03 Added additional dnslists conditions == and =& which are different from
2103 = and & when the dns lookup returns more than one IP address.
2105 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2106 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2108 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2109 FSYNC, which compiles an option called disable_fsync that allows for
2110 bypassing fsync(). The documentation is heavily laced with warnings.
2112 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2114 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2115 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2116 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2117 including adding "make clean"; (3) Added -fPIC when compiling the test
2118 dynamically loaded module, to get rid of a warning.
2120 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2121 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2122 = 0s. The bug is otherwise harmless.
2124 PH/07 There was a bug in the dovecot authenticator such that the value of
2125 $auth1 could be overwritten, and so not correctly preserved, after a
2126 successful authentication. This usually meant that the value preserved by
2127 the server_setid option was incorrect.
2129 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2131 PH/09 Installed PCRE release 7.0.
2133 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2134 run for batched SMTP input. It is now run at the start of every message
2135 in the batch. While fixing this I discovered that the process information
2136 (output by running exiwhat) was not always getting set for -bs and -bS
2137 input. This is fixed, and it now also says "batched" for BSMTP.
2139 PH/11 Added control=no_pipelining.
2141 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2142 patch, slightly modified), and move the expansion of helo_data till after
2143 the connection is made in the smtp transport (so it can use these
2146 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2148 PH/14 Added log_selector = +pid.
2150 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2152 PH/16 Add ${if forany and ${if forall.
2154 PH/17 Added dsn_from option to vary the From: line in DSNs.
2156 PH/18 Flush SMTP output before performing a callout, unless control =
2157 no_callout_flush is set.
2159 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2160 was true (the default) a successful delivery failed to delete the retry
2161 item, thus causing premature timeout of the address. The bug is now
2164 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2166 PH/21 Long custom messages for fakedefer and fakereject are now split up
2167 into multiline responses in the same way that messages for "deny" and
2168 other ACL rejections are.
2170 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2171 with slight modification.
2173 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2174 draft, changing the syntax and factoring some duplicate code".
2176 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2177 for deliveries of the second and subsequent messages over the same SMTP
2180 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2181 ${reduce, with only minor "tidies".
2183 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2185 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2186 expansion side effects.
2188 PH/27 When a message times out after an over-quota error from an Exim-imposed
2189 quota, the bounce message says "mailbox is full". This message was not
2190 being given when it was a system quota that was exceeded. It now should
2193 MH/03 Made $recipients available in local_scan(). local_scan() already has
2194 better access to the recipient list through recipients_list[], but
2195 $recipients can be useful in postmaster-provided expansion strings.
2197 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2198 in the case of a MAIL command with additional options following the
2199 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2200 were accidentally chopped off.
2202 PH/29 SMTP synchronization checks are implemented when a command is read -
2203 there is a check that no more input is waiting when there shouldn't be
2204 any. However, for some commands, a delay in an ACL can mean that it is
2205 some time before the response is written. In this time, more input might
2206 arrive, invalidly. So now there are extra checks after an ACL has run for
2207 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2208 pipelining has not been advertised.
2210 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2212 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2213 returned in the SMTP response when smtp_return_error_details was false.
2214 This has been fixed.
2216 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2217 instead of the C I/O that was originally supplied, because problems were
2218 reported on Solaris.
2220 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2221 Exim which did not show up earlier: it was assuming that a call to
2222 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2223 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2224 was a macro that became an assignment, so it seemed to work. This has
2225 changed to a proper function call with a void return, hence the compile
2226 error. Exim's code has been fixed.
2228 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2231 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2233 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2235 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2236 because it turns out to be too big or there is a timeout) there is no
2237 "Completed" line in the log. When some messages of this type were
2238 selected by exigrep, they were listed as "not completed". Others were
2239 picked up by some special patterns. I have improved the selection
2240 criteria to be more general.
2242 PH/38 The host_find_failed option in the manualroute router can now be set
2243 to "ignore", to completely ignore a host whose IP address cannot be
2244 found. If all hosts are ignored, the behaviour is controlled by the new
2245 host_all_ignored option.
2247 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2248 homing or because of multiple MX records with /mx) generated more than
2249 one IP address, and the following item turned out to be the local host,
2250 all the secondary addresses of the first item were incorrectly removed
2251 from the list, along with the local host and any following hosts (which
2252 is what is supposed to happen).
2254 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2255 whoever called Exim into the -H file. In the case of the daemon it was
2256 behaving confusingly. When first started, it used values for whoever
2257 started the daemon, but after a SIGHUP it used the Exim user (because it
2258 calls itself on a restart). I have changed the code so that it now always
2261 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2262 message are rejected with the same error (e.g. no authentication or bad
2263 sender address), and a DATA command is nevertheless sent (as can happen
2264 with PIPELINING or a stupid MUA), the error message that was given to the
2265 RCPT commands is included in the rejection of the DATA command. This is
2266 intended to be helpful for MUAs that show only the final error to their
2269 PH/42 Another patch from the Sieve maintainer.
2271 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2272 Eximstats - Fixed some broken HTML links and added missing column headers
2274 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2275 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2277 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2279 PH/43 Yet another patch from the Sieve maintainer.
2281 PH/44 I found a way to check for a TCP/IP connection going away before sending
2282 the response to the final '.' that terminates a message, but only in the
2283 case where the client has not sent further data following the '.'
2284 (unfortunately, this is allowed). However, in many cases there won't be
2285 any further data because there won't be any more messages to send. A call
2286 to select() can be used: if it shows that the input is "ready", there is
2287 either input waiting, or the socket has been closed. An attempt to read
2288 the next input character can distinguish the two cases. Previously, Exim
2289 would have sent an OK response which the client would never have see.
2290 This could lead to message repetition. This fix should cure that, at
2291 least in a lot of common cases.
2293 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2294 advertised in response to EHLO.
2300 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2301 fixed by 4.65/MH/01 (is this a record?) are fixed:
2303 (i) An empty string was always treated as zero by the numeric comparison
2304 operators. This behaviour has been restored.
2306 (ii) It is documented that the numeric comparison operators always treat
2307 their arguments as decimal numbers. This was broken in that numbers
2308 starting with 0 were being interpreted as octal.
2310 While fixing these problems I realized that there was another issue that
2311 hadn't been noticed. Values of message_size_limit (both the global option
2312 and the transport option) were treated as octal if they started with 0.
2313 The documentation was vague. These values are now always treated as
2314 decimal, and I will make that clear in the documentation.
2320 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2321 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2324 MH/01 Don't check that the operands of numeric comparison operators are
2325 integers when their expansion is in "skipping" mode (fixes bug
2326 introduced by 4.64-PH/07).
2328 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2329 child addresses, Exim now panics and dies. Previously, because the count
2330 is held in a short int, deliveries were likely to be lost. As such a
2331 large number of recipients for a single message is ridiculous
2332 (performance will be very, very poor), I have chosen to impose a limit
2333 rather than extend the field.
2339 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2340 leftover -K file (the existence of which was triggered by #402).
2341 While we were at it, introduced process PID as part of the -K
2342 filename. This should rule out race conditions when creating
2345 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2346 processing considerably. Previous code took too long for large mails,
2347 triggering a timeout which in turn triggers #401.
2349 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2350 in the DK code in transports.c. sendfile() is not really portable,
2351 hence the _LINUX specificness.
2353 TF/01 In the add_headers option to the mail command in an Exim filter,
2354 there was a bug that Exim would claim a syntax error in any
2355 header after the first one which had an odd number of characters
2358 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2359 callout verification, Exim cached a "reject" for the entire domain. This
2360 is correct for most verifications, but it is not correct for a recipient
2361 verification with use_sender or use_postmaster set, because in that case
2362 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2363 case of MAIL FROM:<> rejection from other early rejections (e.g.
2364 rejection of HELO). When verifying a recipient using a non-null MAIL
2365 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2366 Whatever the result of the callout, the value of the domain cache is
2367 left unchanged (for any other kind of callout, getting as far as trying
2368 RCPT means that the domain itself is ok).
2370 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2373 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2374 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2375 session, the daemon ignores ECONNECT errors and logs others; it now
2376 ignores EPIPE as well.
2378 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2379 (quoted-printable decoding).
2381 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2382 later the small subsequent patch to fix an introduced bug.
2384 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2386 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2388 PH/08 An error is now given if message_size_limit is specified negative.
2390 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2391 to be given (somewhat) arbitrary names.
2393 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2396 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2397 miscellaneous code fixes
2399 PH/10 Added the log_reject_target ACL modifier to specify where to log
2402 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2403 hostname. This is wrong, because it relates to the incoming message (and
2404 probably the interface on which it is arriving) and not to the outgoing
2405 callout (which could be using a different interface). This has been
2406 changed to use the value of the helo_data option from the smtp transport
2407 instead - this is what is used when a message is actually being sent. If
2408 there is no remote transport (possible with a router that sets up host
2409 addresses), $smtp_active_hostname is used.
2411 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2412 tweaks were necessary in order to get it to work (see also 21 below):
2413 (a) The code assumed that strncpy() returns a negative number on buffer
2414 overflow, which isn't the case. Replaced with Exim's string_format()
2416 (b) There were several signed/unsigned issues. I just did the minimum
2417 hacking in of casts. There is scope for a larger refactoring.
2418 (c) The code used strcasecmp() which is not a standard C function.
2419 Replaced with Exim's strcmpic() function.
2420 (d) The code set only $1; it now sets $auth1 as well.
2421 (e) A simple test gave the error "authentication client didn't specify
2422 service in request". It would seem that Dovecot has changed its
2423 interface. Fortunately there's a specification; I followed it and
2424 changed what the client sends and it appears to be working now.
2426 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2429 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2430 address A is aliased to B and C, where B exists and C does not. Without
2431 -v the output is "A verified" because verification stops after a
2432 successful redirection if more than one address is generated. However,
2433 with -v the child addresses are also verified. Exim was outputting "A
2434 failed to verify" and then showing the successful verification for C,
2435 with its parentage. It now outputs "B failed to verify", showing B's
2436 parentage before showing the successful verification of C.
2438 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2439 look up a TXT record in a specific list after matching in a combined
2442 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2443 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2444 they consult the DNS. I had assumed they would set it the way they
2445 wanted; and indeed my experiments on Linux seem to show that in some
2446 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2447 To be on the safe side, however, I have now made the interface to
2448 host_find_byname() similar to host_find_bydns(), with an argument
2449 containing the DNS resolver options. The host_find_byname() function now
2450 sets these options at its start, just as host_find_bydns() does. The smtp
2451 transport options dns_qualify_single and dns_search_parents are passed to
2452 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2453 of host_find_byname() use the default settings of RES_DEFNAMES
2454 (qualify_single) but not RES_DNSRCH (search_parents).
2456 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2457 spool_read_header() do less string testing, by means of a preliminary
2458 switch on the second character of optional "-foo" lines. (This is
2459 overdue, caused by the large number of possibilities that now exist.
2460 Originally there were few.) While I was there, I also converted the
2461 str(n)cmp tests so they don't re-test the leading "-" and the first
2462 character, in the hope this might squeeze out yet more improvement.
2464 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2465 flag allowing group syntax was set by the header_syntax check but not
2466 turned off, possible causing trouble later; (2) The flag was not being
2467 set at all for the header_verify test, causing "group"-style headers to
2468 be rejected. I have now set it in this case, and also caused header_
2469 verify to ignore an empty address taken from a group. While doing this, I
2470 came across some other cases where the code for allowing group syntax
2471 while scanning a header line wasn't quite right (mostly, not resetting
2472 the flag correctly in the right place). These bugs could have caused
2473 trouble for malformed header lines. I hope it is now all correct.
2475 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2476 with the "reply" argument non-NULL. The code, however (which originally
2477 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2478 but it didn't always do it. This confused somebody who was copying the
2479 code for some other use. I have removed all the tests.
2481 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2482 feature that was used to support insecure browsers during the U.S. crypto
2483 embargo. It requires special client support, and Exim is probably the
2484 only MTA that supported it -- and would never use it because real RSA is
2485 always available. This code has been removed, because it had the bad
2486 effect of slowing Exim down by computing (never used) parameters for the
2487 RSA_EXPORT functionality.
2489 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2490 authenticator to fail if there's a tab character in the incoming data
2491 (there should never be unless someone is messing about, as it's supposed
2492 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2493 if the connection is using TLS or if the remote IP is the same as the
2494 local IP, and the "valid-client-cert option" if a client certificate has
2497 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2498 authenticators. This can be used for authorization after authentication
2499 succeeds. (In the case of plaintext, it servers for both authentication
2502 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2503 if any retry times were supplied.
2505 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2506 connection, where there is no client IP address to check. In this
2507 situation, the verify now always succeeds.
2509 PH/25 Applied John Jetmore's -Mset patch.
2511 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2513 PH/27 In a string expansion for a processed (not raw) header when multiple
2514 headers of the same name were present, leading whitespace was being
2515 removed from all of them, but trailing whitespace was being removed only
2516 from the last one. Now trailing whitespace is removed from each header
2517 before concatenation. Completely empty headers in a concatenation (as
2518 before) are ignored.
2520 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2521 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2523 PH/29 [Removed. This was a change that I later backed out, and forgot to
2524 correct the ChangeLog entry (that I had efficiently created) before
2525 committing the later change.]
2527 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2528 address errors (4xx response to RCPT) over the same connection as other
2529 messages routed to the same hosts. Such deliveries are always "forced",
2530 so retry times are not inspected. This resulted in far too many retries
2531 for the affected addresses. The effect occurred only when there were more
2532 hosts than the hosts_max_try setting in the smtp transport when it had
2533 the 4xx errors. Those hosts that it had tried were not added to the list
2534 of hosts for which the message was waiting, so if all were tried, there
2535 was no problem. Two fixes have been applied:
2537 (i) If there are any address or message errors in an SMTP delivery, none
2538 of the hosts (tried or untried) are now added to the list of hosts
2539 for which the message is waiting, so the message should not be a
2540 candidate for sending over the same connection that was used for a
2541 successful delivery of some other message. This seems entirely
2542 reasonable: after all the message is NOT "waiting for some host".
2543 This is so "obvious" that I'm not sure why it wasn't done
2544 previously. Hope I haven't missed anything, but it can't do any
2545 harm, as the worst effect is to miss an optimization.
2547 (ii) If, despite (i), such a delivery is accidentally attempted, the
2548 routing retry time is respected, so at least it doesn't keep
2549 hammering the server.
2551 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2552 in ${readsocket because some servers need this prod.
2554 PH/32 Added some extra debug output when updating a wait-xxx database.
2556 PH/33 The hint "could be header name not terminated by colon", which has been
2557 given for certain expansion errors for a long time, was not being given
2558 for the ${if def:h_colon_omitted{... case.
2560 PH/34 The spec says: "With one important exception, whenever a domain list is
2561 being scanned, $domain contains the subject domain." There was at least
2562 one case where this was not true.
2564 PH/35 The error "getsockname() failed: connection reset by peer" was being
2565 written to the panic log as well as the main log, but it isn't really
2566 panic-worthy as it just means the connection died rather early on. I have
2567 removed the panic log writing for the ECONNRESET error when getsockname()
2570 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2571 runs only) independently of the message's sender address. This meant
2572 that, if the 4xx error was in fact related to the sender, a different
2573 message to the same recipient with a different sender could confuse
2574 things. In particular, this can happen when sending to a greylisting
2575 server, but other circumstances could also provoke similar problems.
2576 I have changed the default so that the retry time for these errors is now
2577 based a combination of the sender and recipient addresses. This change
2578 can be overridden by setting address_retry_include_sender=false in the
2581 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2582 remote server are returned as part of bounce messages. This was not
2583 happening for LMTP over a pipe (the lmtp transport), but now it is the
2584 same for both kinds of LMTP.
2586 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2587 in header lines that were in fact CNAMEs. This is no longer the case.
2589 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2590 and queue runs started by the daemon processed all messages. This has
2591 been fixed so that -R and -S can now usefully be given with -q<time>.
2593 PH/40 Import PCRE release 6.7 (fixes some bugs).
2595 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2597 PH/42 Give an error if -q is specified more than once.
2599 PH/43 Renamed the variables $interface_address and $interface_port as
2600 $received_ip_address and $received_port, to make it clear that these
2601 values apply to message reception, and not to the outgoing interface when
2602 a message is delivered. (The old names remain recognized, of course.)
2604 PH/44 There was no timeout on the connect() call when using a Unix domain
2605 socket in the ${readsocket expansion. There now is.
2607 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2608 be meaningful with "accept".
2610 SC/01 Eximstats V1.43
2611 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2613 SC/02 Eximstats V1.44
2614 Use a glob alias rather than an array ref in the generated
2615 parser. This improves both readability and performance.
2617 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2618 Collect SpamAssassin and rejection statistics.
2619 Don't display local sender or destination tables unless
2620 there is data to show.
2621 Added average volumes into the top table text output.
2623 SC/04 Eximstats V1.46
2624 Collect data on the number of addresses (recipients)
2625 as well as the number of messages.
2627 SC/05 Eximstats V1.47
2628 Added 'Message too big' to the list of mail rejection
2629 reasons (thanks to Marco Gaiarin).
2631 SC/06 Eximstats V1.48
2632 Mainlog lines which have GMT offsets and are too short to
2633 have a flag are now skipped.
2635 SC/07 Eximstats V1.49 (Alain Williams)
2636 Added the -emptyok flag.
2638 SC/08 Eximstats V1.50
2639 Fixes for obtaining the IP address from reject messages.
2641 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2642 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2643 whitespace changes from 4.64-PH/27
2645 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2648 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2649 are found, allow negative numbers in numeric criteria)
2651 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2653 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2654 to match changes made in 4.64-PH/43
2656 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2658 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2659 "domain" is actually an IP address, and force a failure. This locks out
2660 those revolvers/nameservers that support "A-for-A" lookups, in
2661 contravention of the specifications.
2663 PH/48 When a host name was looked up from an IP address, and the subsequent
2664 forward lookup of the name timed out, the host name was left in
2665 $sender_host_name, contrary to the specification.
2667 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2668 restricted to single-key lookups, Exim was not diagnosing an error if
2669 * or *@ was used with a query-style lookup.
2671 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2673 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2674 long ago, but noone interested enough thought of it. Let's just say that
2675 the "1.1" means that there are some new functions that weren't there at
2676 some point in the past.
2678 PH/51 Error processing for expansion failure of helo_data from an smtp
2679 transport during callout processing was broken.
2681 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2682 tested/used via the -bh/-bhc/-bs options.
2684 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2685 bug, fixed in subsequent PCRE releases).
2687 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2688 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2690 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2696 SC/01 Use a glob alias rather than an array ref in eximstats generated
2697 parser. This improves both readability and performance.
2699 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2700 Don't display local sender or destination tables in eximstats unless
2701 there is data to show.
2702 Added average volumes into the eximstats top table text output.
2704 SC/03 Collect data on the number of addresses (recipients) as well
2705 as the number of messages in eximstats.
2707 TF/01 Correct an error in the documentation for the redirect router. Exim
2708 does (usually) call initgroups() when daemonizing.
2710 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2711 with consistent privilege compared to when running as a daemon.
2713 TF/03 Note in the spec that $authenticated_id is not set for local
2714 submissions from trusted users.
2716 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2717 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2719 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2720 by adding some example configuration directives to the default
2721 configuration file. A little bit of work is required to uncomment the
2722 directives and define how usernames and passwords are checked, but
2723 there is now a framework to start from.
2725 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2726 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2727 without this. I don't know how relevant this is to other LDAP libraries.
2729 PH/02 Add the verb name to the "unknown ACL verb" error.
2731 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2733 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2735 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2736 directory not expanded when it should be if an expanded home directory
2737 was set for the address (which is overridden by the transport).
2739 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2742 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2743 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2744 because it is too late at that time, and has no effect.
2746 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2747 security issue with \' (bugzilla #107). I could not use the
2748 PQescapeStringConn() function, because it needs a PGconn value as one of
2751 PH/08 When testing addresses using -bt, indicate those final addresses that
2752 are duplicates that would not cause an additional delivery. At least one
2753 person was confused, thinking that -bt output corresponded to deliveries.
2754 (Suppressing duplicates isn't a good idea as you lose the information
2755 about possibly different redirections that led to the duplicates.)
2757 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2758 systems where poll() doesn't work, in particular OS X.
2760 PH/10 Added more information to debugging output for retry time not reached.
2762 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2763 operations in malware.c.
2765 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2768 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2769 syslog_duplication set false, log lines that would normally be written
2770 both the the main log and to the reject log were not written to syslog at
2773 PH/14 In the default configuration, change the use of "message" in ACL warn
2774 statements to "add_header".
2776 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2777 not followed by a command (e.g. "seen endif").
2779 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2780 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2783 PH/17 Added extra conditions to the default value of delay_warning_condition
2787 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2788 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2789 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2792 The Auto-Submitted: and various List- headers are standardised, whereas I
2793 don't think Precedence: ever was.
2795 PH/18 Refactored debugging code in route_finduser() to show more information,
2796 in particular, the error code if getpwnam() issues one.
2798 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2799 This is apparently needed in addition to the PH/07 change above to avoid
2800 any possible encoding problems.
2802 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2803 but not after initializing Perl.
2805 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2806 output them only if debugging. By default they are written stderr,
2807 apparently, which is not desirable.
2809 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2812 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2815 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2817 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2818 authenticated or an ident call has been made. Suppress the default
2819 values for $authenticated_id and $authenticated_sender (but permit -oMai
2820 and -oMas) when testing with -bh.
2822 PH/24 Re-jigged the order of the tests in the default configuration so that the
2823 tests for valid domains and recipients precede the DNS black list and CSA
2824 tests, on the grounds that those ones are more expensive.
2826 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2827 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2828 This bug exists in every version of Exim that I still have, right back to
2831 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2832 However, an attempt to turn on case-sensitivity in a regex key by
2833 including (?-i) didn't work because the subject string was already
2834 lowercased, and the effects were non-intuitive. It turns out that a
2835 one-line patch can be used to allow (?-i) to work as expected.
2841 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2842 other effects) broke the use of negated acl sub-conditions.
2844 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2847 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2848 "Deny" causes Exim to reject the incoming connection with a 554 error.
2849 Unfortunately, if there is a major crisis, such as a disk failure,
2850 tcp-wrappers gives "deny", whereas what one would like would be some
2851 kind of temporary error. A kludge has been added to help with this.
2852 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2853 554 error is used if errno is still zero or contains ENOENT (which occurs
2854 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2857 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2859 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2860 errors. Otherwise a message that provokes a temporary error (when other
2861 messages do not) can cause a whole host to time out.
2863 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2864 addresses were routed directly to files or pipes from a redirect router.
2865 File deliveries just didn't batch; pipe deliveries might have suffered
2868 PH/06 A failure to get a lock for a hints database would erroneously always say
2869 "Failed to get write lock", even when it was really a read lock.
2871 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2872 of 0600. This has been changed to use the value of the lockfile_mode
2873 option (which defaults to 0600).
2875 PH/08 Applied small patch from the Sieve maintainer.
2877 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2878 folder from quota calculations, a direct delivery into this folder messed
2879 up the contents of the maildirsize file. This was because the regex was
2880 used only to exclude .Trash (or whatever) when the size of the mailbox
2881 was calculated. There was no check that a delivery was happening into an
2882 excluded directory. This bug has been fixed by ignoring all quota
2883 processing for deliveries into excluded directories.
2885 PH/10 Added the maildirfolder_create_regex option to appendfile.
2891 PH/01 The code for finding all the local interface addresses on a FreeBSD
2892 system running IPv6 was broken. This may well have applied to all BSD
2893 systems, as well as to others that have similar system calls. The broken
2894 code found IPv4 interfaces correctly, but gave incorrect values for the
2895 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2896 that it would not match correctly against @[] and not recognize the IPv6
2899 PH/02 The ipliteral router was not recognizing addresses of the form user@
2900 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2902 PH/03 Added disable_ipv6.
2904 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2905 decoded form, because it is most often used to construct To: headers
2906 lines in autoreplies, and the decoded form may well be syntactically
2907 invalid. However, $reply_address has leading white space removed, and all
2908 newlines turned into spaces so that the autoreply transport does not
2911 PH/05 If group was specified without a user on a router, and no group or user
2912 was specified on a transport, the group from the router was ignored.
2914 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2915 for visible compile-time settings that can be used to change these
2916 numbers, for those that want even more. Backwards compatibility with old
2917 spool files has been maintained. However, going back to a previous Exim
2918 release will lost any variables that are in spool files.
2920 PH/07 Two small changes when running in the test harness: increase delay when
2921 passing a TCP/IP connection to a new process, in case the original
2922 process has to generate a bounce, and remove special handling of
2923 127.0.0.2 (sic), which is no longer necessary.
2925 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2926 be the same on different OS.
2928 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2931 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2932 whether --show-vars was specified or not
2934 JJ/02 exipick: Added support for new ACL variable spool format introduced
2937 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2938 syntactically invalid From: or Reply-to: line, and a filter used this to
2939 generate an autoreply, and therefore failed to obtain an address for the
2940 autoreply, Exim could try to deliver to a non-existent relative file
2941 name, causing unrelated and misleading errors. What now happens is that
2942 it logs this as a hard delivery error, but does not attempt to create a
2945 PH/11 The exinext utility has a -C option for testing purposes, but although
2946 the given file was scanned by exinext itself; it wasn't being passed on
2947 when Exim was called.
2949 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2950 an end-of-file indication when reading a command response.
2952 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2953 compiled. In many other places in Exim, IPv6 addresses are always
2954 recognized, so I have changed this. It also means that IPv4 domain
2955 literals of the form [IPV4:n.n.n.n] are now always recognized.
2957 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2958 used if the router is not running as root, for example, when verifying at
2959 ACL time, or when using -bh. The debugging output from this situation was
2960 non-existent - all you got was a failure to exec. I have made two
2963 (a) Failures to set uid/gid, the current directory, or a process leader
2964 in a subprocess such as that created by queryprogram now generate
2965 suitable debugging output when -d is set.
2967 (b) The queryprogram router detects when it is not running as root,
2968 outputs suitable debugging information if -d is set, and then runs
2969 the subprocess without attempting to change uid/gid.
2971 PH/15 Minor change to Makefile for building test_host (undocumented testing
2974 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2975 additional section of a DNS packet that returns MX or SRV records.
2976 Instead, it always explicitly searches for A/AAAA records. This avoids
2977 major problems that occur when a DNS server includes only records of one
2978 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2979 fixed another bug: if SRV records were looked up and the corresponding
2980 address records were *not* found in the additional section, the port
2981 values from the SRV records were lost.
2983 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2984 using the correct key (the original address) when searching the retry
2985 rules in order to find which one to use for generating the retry hint.
2987 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2988 adding the default one. Similarly, if it contains a Reply-To: header, the
2989 errors_reply_to option, if set, is not used.
2991 PH/19 When calculating a retry time, Exim used to measure the "time since
2992 failure" by looking at the "first failed" field in the retry record. Now
2993 it does not use this if it is later than than the arrival time of the
2994 message. Instead it uses the arrival time. This makes for better
2995 behaviour in cases where some deliveries succeed, thus re-setting the
2996 "first failed" field. An example is a quota failure for a huge message
2997 when small messages continue to be delivered. Without this change, the
2998 "time since failure" will always be short, possible causing more frequent
2999 delivery attempts for the huge message than are intended.
3000 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3002 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3003 $1, $2, $3) because the numerical variables can be reset during some
3004 expansion items (e.g. "match"), thereby losing the authentication data.
3006 PH/21 Make -bV show the size of off_t variables so that the test suite can
3007 decide whether to run tests for quotas > 2G.
3009 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3010 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3011 filecount value is greater than 2G or if a quota value is greater than 2G
3012 on a system where the size of off_t is not greater than 4, a panic error
3015 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3016 never match. The debug and -bh output now contains an explicit error
3017 message indicating a malformed IPv4 address or mask.
3019 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3020 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3021 PH/23 above applies.
3023 PH/25 Do not write to syslog when running in the test harness. The only
3024 occasion when this arises is a failure to open the main or panic logs
3025 (for which there is an explicit test).
3027 PH/26 Added the /no_tell option to "control=freeze".
3029 PH/27 If a host name lookup failed very early in a connection, for example, if
3030 the IP address matched host_lookup and the reverse lookup yielded a name
3031 that did not have a forward lookup, an error message of the form "no IP
3032 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3033 could be logged. Now it outputs the IP address instead of "NULL".
3035 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3036 allows the sender and the authenticated sender to be set when
3037 submitting a message from within Exim. Since child_open_exim() is
3038 documented for local_scan(), the new function should be too.
3040 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3041 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3042 results in an empty string is now treated as unset.
3044 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3046 PH/31 Added sender_verify_fail logging option.
3048 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3049 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3050 tidied the source and removed it altogether.
3052 PH/33 When a queue run was abandoned because the load average was too high, a
3053 log line was always written; now it is written only if the queue_run log
3054 selector is set. In addition, the log line for abandonment now contains
3055 information about the queue run such as the pid. This is always present
3056 in "start" and "stop" lines but was omitted from the "abandon" line.
3058 PH/34 Omit spaces between a header name and the colon in the error message that
3059 is given when verify = headers_syntax fails (if there are lots of them,
3060 the message gets confusing).
3062 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3063 names, as there are now some PTR records that contain slashes. This check
3064 is only to protect against broken name servers that fall over on strange
3065 characters, so the fact that it applies to all lookups doesn't matter.
3067 PH/36 Now that the new test suite is complete, we can remove some of the
3068 special code in Exim that was needed for the old test suite. For example,
3069 sorting DNS records because real resolvers return them in an arbitrary
3070 order. The new test suite's fake resolver always returns records in the
3073 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3074 bounces) except when queue_only is set, to avoid logging races between
3075 the different processes.
3077 PH/38 Panic-die if .include specifies a non-absolute path.
3079 PH/39 A tweak to the "H" retry rule from its user.
3081 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3082 a label. They prevented compilation on older perls.
3084 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3085 a warning to be raised on newish perls.
3087 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3088 on queue. Changes to match documented behaviour of showing count of
3089 messages matching specified criteria.
3091 PH/40 Changed the default ident timeout from 30s to 5s.
3093 PH/41 Added support for the use of login_cap features, on those BSD systems
3094 that have them, for controlling the resources used by pipe deliveries.
3096 PH/42 The content-scanning code uses fopen() to create files in which to put
3097 message data. Previously it was not paying any attention to the mode of
3098 the files. Exim runs with umask(0) because the rest of the code creates
3099 files with open(), and sets the required mode explicitly. Thus, these
3100 files were ending up world-writeable. This was not a big issue, because,
3101 being within the spool directory, they were not world-accessible. I have
3102 created a function called modefopen, which takes an additional mode
3103 argument. It sets umask(777), creates the file, chmods it to the required
3104 mode, then resets the umask. All the relevant calls to fopen() in the
3105 content scanning code have been changed to use this function.
3107 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3108 to 24 hours. This avoids potential overflow problems when processing G
3109 and H retry rules. I suspect nobody ever tinkers with this value.
3111 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3113 PH/45 When the plaintext authenticator is running as a client, the server's
3114 challenges are checked to ensure they are valid base64 strings. By
3115 default, the authentication attempt is cancelled if an invalid string is
3116 received. Setting client_ignore_invalid_base64 true ignores these errors.
3117 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3118 they are received. Thus, the responses can be made to depend on the
3119 challenges. If an invalid string is ignored, an empty string is placed in
3122 PH/46 Messages that are created by the autoreply transport now contains a
3123 References: header, in accordance with RFCs 2822 and 3834.
3125 PH/47 Added authenticated_sender_force to the smtp transport.
3127 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3129 PH/49 Installed latest patch from the Sieve maintainer.
3131 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3132 was also set, the appendfile transport was unnecessarily scanning a
3133 directory of message files (e.g. for maildir delivery) to find the count
3134 of files (along with the size), even though it did not need this
3135 information. It now does the scan only if it needs to find either the
3136 size of the count of files.
3138 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3140 PH/52 Two bugs concerned with error handling when the smtp transport is
3143 (i) Exim was not creating retry information for temporary errors given
3144 for individual recipients after the DATA command when the smtp transport
3145 was used in LMTP mode. This meant that they could be retried too
3146 frequently, and not timed out correctly.
3148 (ii) Exim was setting the flag that allows error details to be returned
3149 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3150 recipients that were returned after the DATA command.
3152 PH/53 This is related to PH/52, but is more general: for any failing address,
3153 when detailed error information was permitted to be returned to the
3154 sender, but the error was temporary, then after the final timeout, only
3155 "retry timeout exceeded" was returned. Now it returns the full error as
3156 well as "retry timeout exceeded".
3158 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3159 do this, and (what is worse) MTAs that accept it.
3161 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3162 will now be deprecated.
3164 PH/56 New os.c-cygwin from the Cygwin maintainer.
3166 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3167 formats (previously only available in exim formats via -bpr, -bpru,
3168 and -bpra. Now also available in native and exiqgrep formats)
3170 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3171 with very large, slow to parse queues
3173 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3175 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3177 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3178 responses to authentication challenges, though it was showing the
3179 challenges; (ii) I've removed the CR characters from the debug output for
3182 PH/58 Allow for the insertion of a newline as well as a space when a string
3183 is turned into more than one encoded-word during RFC 2047 encoding. The
3184 Sieve code now uses this.
3186 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3187 data_4xx, lost_connection, tls_required.
3189 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3190 message was being sent as an SMTP response.
3192 PH/61 Add -l and -k options to exicyclog.
3194 PH/62 When verifying, if an address was redirected to one new address, so that
3195 verification continued, and the new address failed or deferred after
3196 having set something in $address_data, the value of $address_data was not
3197 passed back to the ACL. This was different to the case when no
3198 redirection occurred. The value is now passed back in both cases.
3200 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3201 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3202 use login_cap.h, so on its own it isn't the distinguishing feature. The
3203 new name refers directly to the setclassresources() function.
3205 PH/65 Added configuration files for NetBSD3.
3207 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3209 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3210 is preferred over IPv4.
3212 PH/68 The bounce_return_message and bounce_return_body options were not being
3213 honoured for bounces generated during the reception of non-SMTP messages.
3214 In particular, this applied to messages rejected by the ACL. This bug has
3215 been fixed. However, if bounce_return_message is true and bounce_return_
3216 body is false, the headers that are returned for a non-SMTP message
3217 include only those that have been read before the error was detected.
3218 (In the case of an ACL rejection, they have all been read.)
3220 PH/69 The HTML version of the specification is now built in a directory called
3221 spec_html instead of spec.html, because the latter looks like a path with
3222 a MIME-type, and this confuses some software.
3224 PH/70 Catch two compiler warnings in sieve.c.
3226 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3227 function verify_get_ident() calls ip_connect() to connect a socket, but
3228 if the "connect()" function timed out, ip_connect() used to close the
3229 socket. However, verify_get_ident() also closes the socket later, and in
3230 between Exim writes to the log, which may get opened at this point. When
3231 the socket was closed in ip_connect(), the log could get the same file
3232 descriptor number as the socket. This naturally causes chaos. The fix is
3233 not to close the socket in ip_connect(); the socket should be closed by
3234 the function that creates it. There was only one place in the code where
3235 this was missing, in the iplookup router, which I don't think anybody now
3236 uses, but I've fixed it anyway.
3238 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3239 well as to direct DNS lookups. Otherwise the handling of names in host
3240 lists is inconsistent and therefore confusing.
3246 PH/01 Two changes to the default runtime configuration:
3248 (1) Move the checks for relay_from_hosts and authenticated clients from
3249 after to before the (commented out) DNS black list checks.
3251 (2) Add control=submission to the relay_from_hosts and authenticated
3252 clients checks, on the grounds that messages accepted by these
3253 statements are most likely to be submissions.
3255 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3257 (1) Generate an error if the third argument for the ${prvs expansion is
3260 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3263 (3) Reset the variables that are obtained from the first argument of
3264 ${prvscheck and used in the second argument before leaving the code,
3265 because their memory is reclaimed, so using them afterwards may do
3268 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3269 one (it's much easier than Tom thought :-).
3271 (5) Because of (4), we can now allow for the use of $prvscheck_result
3272 inside the third argument.
3274 PH/03 For some reason, the default setting of PATH when running a command from
3275 a pipe transport was just "/usr/bin". I have changed it to
3278 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3279 anything to be listed in the output from -bV.
3281 PH/05 When a filter generated an autoreply, the entire To: header line was
3282 quoted in the delivery log line, like this:
3284 => >A.N.Other <ano@some.domain> <original@ddress> ...
3286 This has been changed so that it extracts the operative address. There
3287 may be more than one such address. If so, they are comma-separated, like
3290 => >ano@some.domain,ona@other.domain <original@ddress> ...
3292 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3293 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3294 not being looked up in the rDNS to get a host name, Exim was showing the
3295 IP address twice in Received: lines, even though the IP addresses were
3296 identical. For example:
3298 Received: from [1.2.3.4] (helo=[1.2.3.4])
3300 However, if the real host name was known, it was omitting the HELO data
3301 if it matched the actual IP address. This has been tidied up so that it
3302 doesn't show the same IP address twice.
3304 PH/07 When both +timestamp and +memory debugging was on, the value given by
3305 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3306 called by the debug printing, thereby overwriting the timestamp buffer.
3307 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3309 PH/08 When the original message was included in an autoreply transport, it
3310 always said "this is a copy of the message, including all the headers",
3311 even if body_only or headers_only was set. It now gives an appropriate
3314 PH/09 Applied a patch from the Sieve maintainer which:
3316 o fixes some comments
3317 o adds the (disabled) notify extension core
3318 o adds some debug output for the result of if/elsif tests
3319 o points to the current vacation draft in the documentation
3320 and documents the missing references header update
3324 o fixes a bug in processing the envelope test (when testing
3325 multiple envelope elements, the last element determined the
3328 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3329 Electronic Mail") by including:
3331 Auto-submitted: auto-generated
3333 in the messages that it generates (bounce messages and others, such as
3334 warnings). In the case of bounce messages for non-SMTP messages, there was
3335 also a typo: it was using "Auto_submitted" (underscore instead of
3336 hyphen). Since every message generated by Exim is necessarily in response
3337 to another message, thes have all been changed to:
3339 Auto-Submitted: auto-replied
3341 in accordance with these statements in the RFC:
3343 The auto-replied keyword:
3345 - SHOULD be used on messages sent in direct response to another
3346 message by an automatic process,
3348 - MUST NOT be used on manually-generated messages,
3350 - MAY be used on Delivery Status Notifications (DSNs) and Message
3351 Disposition Notifications (MDNs),
3353 - MUST NOT be used on messages generated by automatic or periodic
3354 processes, except for messages which are automatic responses to
3357 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3358 to the default Received: header definition.
3360 PH/12 Added log selector acl_warn_skipped (default on).
3362 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3363 variables because (a) they are in the wrong storage pool and (b) even if
3364 they were copied, it wouldn't work properly because of the caching.
3366 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3367 checking when decoding. Apparently there are clients that generate
3368 overlong encoded strings. Why am I not surprised?
3370 PH/15 If the first argument of "${if match_address" was not empty, but did not
3371 contain an "@" character, Exim crashed. Now it writes a panic log message
3372 and treats the condition as false.
3374 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3376 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3377 extension "envelope-auth". The code is finished and in agreement with
3378 other implementations, but there is no documentation so far and in fact,
3379 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3380 not changing the active code.
3382 Print executed "if" and "elsif" statements when debugging is used. This
3383 helps a great deal to understand what a filter does.
3385 Document more things not specified clearly in RFC3028. I had all this
3386 sorted out, when out of a sudden new issues came to my mind. Oops."
3388 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3391 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3392 canonical form (as documented). However, after a host name lookup from
3393 the IP address, check_host() was doing a simple string comparison with
3394 addresses acquired from the DNS when checking that the found name did
3395 have the original IP as one of its addresses. Since any found IPv6
3396 addresses are likely to be in abbreviated form, the comparison could
3397 fail. Luckily, there already exists a function for doing the comparison
3398 by converting both addresses to binary, so now that is used instead of
3399 the text comparison.
3401 PH/20 There was another similar case to PH/19, when a complete host name was
3402 given in a host list; looking up its IP address could give an abbreviated
3403 form, whereas the current host's name might or might not be abbreviated.
3404 The same fix has been applied.
3410 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3411 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3414 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3415 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3417 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3419 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3420 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3421 Also, for "Auto-Submitted", treat anything other than "no" as
3422 non-personal, in accordance with RFC 3834. (Previously it treated
3423 anything starting "auto-" as non-personal.)
3425 TF/01 The control=submission/name=... option had a problem with syntax
3426 errors if the name included a slash character. The /name= option
3427 now slurps the rest of the string, so it can include any characters
3428 but it must come last in the list of options (after /sender_retain
3431 PH/05 Some modifications to the interface to the fake nameserver for the new
3439 TK/01 Added the "success_on_redirect" address verification option. See
3440 NewStuff for rationale and an example.
3442 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3444 PH/02 Patch to exigrep to allow it to work on syslog lines.
3446 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3447 fread() to skip over the body file's header line, because in Cygwin the
3448 header line is locked and is inaccessible.
3450 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3451 co-exist for some time) to make it clear that it is the Exim ID that is
3452 referenced, not the Message-ID: header line.
3454 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3455 string_format() function, because snprintf() does not exist on all
3458 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3459 ${stat: expansion item.
3461 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3462 protocol synchronization error", to keep the pedants happy.
3464 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3465 well as for IRIX systems, when gcc is being used. See the host.c source
3468 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3470 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3473 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3474 transport and to the smtp transport in LMTP mode.
3476 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3478 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3479 run a filter in a subprocess. This could lead to confusion in subsequent
3480 lookups in the parent process. There should also be a search_tidyup() at
3481 the end of the subprocess.
3483 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3484 only if the host matched helo_try_verify_hosts, which caused the
3485 verification to occur when the EHLO/HELO command was issued. The ACL just
3486 tested the remembered result. Now, if a previous verification attempt has
3487 not happened, "verify = helo" does it there and then.
3489 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3491 TK/03 Fix log output including CR from clamd.
3493 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3494 exist provoked a memory error which could cause a segfault.
3496 PH/15 Installed PCRE 6.2
3498 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3500 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3501 of the problem. Specifically, suggested +O2 rather than +O1 for the
3504 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3506 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3507 record, the port was not correctly logged when the outgoing_port log
3508 selector was set (it logged the transort's default port).
3510 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3511 fallback_hosts, and "hosts" in the smtp transport.
3513 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3514 host errors such as "Connection refused".
3516 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3517 authentication with radiusclient 0.4.9:
3519 - Error returned from rc_read_config was caught wrongly
3520 - Username/password not passed on to radius server due to wrong length.
3522 The presumption is that some radiusclient API changes for 4.51/PH/17
3523 were not taken care of correctly. The code is still untested by me (my
3524 Linux distribution still has 0.3.2 of radiusclient), but it was
3525 contributed by a Radius user.
3527 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3528 expanding the "port" option of the smtp transport.
3530 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3531 while reading a MIME header. Thanks to Tom Hughes for a patch.
3533 PH/24 Include config.h inside local_scan.h so that configuration settings are
3536 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3537 that in an ACL for RCPT (for example), you can examine exactly what was
3540 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3541 commands, but it was not correctly comparing the address with the actual
3542 client host address. Thus, it would show the EHLO address in Received:
3543 header lines when this was not necessary.
3545 PH/27 Added the % operator to ${eval:}.
3547 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3548 it should be ignoring failures (because with -C, for example, it has lost
3549 privilege). It wasn't ignoring creation failures other than "already
3552 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3555 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3556 because an input line was too long, either on its own, or by virtue of
3557 too many continuations, the temporary file was not being removed, and the
3558 return code was incorrect.
3560 PH/31 Missing "BOOL" in function definition in filtertest.c.
3562 PH/32 Applied Sieve patches from the maintainer.
3564 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3566 PH/33 Added "verify = not_blind".
3568 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3569 Local/Makefile (with some defaults set). These are used in built scripts
3570 such as exicyclog, but they have never been used in the exim_install
3571 script (though there are many overriding facilities there). I have
3572 arranged that the exim_install script now takes note of these two
3575 PH/35 Installed configuration files for Dragonfly.
3577 PH/36 When a locally submitted message by a trusted user did not contain a
3578 From: header, and the sender address was obtained from -f or from an SMTP
3579 MAIL command, and the trusted user did not use -F to supply a sender
3580 name, $originator_name was incorrectly used when constructing a From:
3581 header. Furthermore, $originator_name was used for submission mode
3582 messages from external hosts without From: headers in a similar way,
3583 which is clearly wrong.
3585 PH/37 Added control=suppress_local_fixups.
3587 PH/38 When log_selector = +received_sender was set, and the addition of the
3588 sender made the log line's construction buffer exactly full, or one byte
3589 less than full, an overflow happened when the terminating "\n" was
3592 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3593 when the result of a list match is failure because a DNS lookup failed.
3595 PH/40 RM_COMMAND is now used in the building process.
3597 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3598 the "build-* directories that it finds.
3600 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3601 address in a domain literal was a prefix of an interface address.
3603 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3604 when verifying a sender address, unless rewrite_headers is false.
3606 PH/44 Wrote a long comment about why errors_to addresses are verified as
3607 recipients, not senders.
3609 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3610 the ratelimit ACL was added.
3612 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3614 PH/46 Added extra information about PostgreSQL errors to the error string.
3616 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3617 avoiding the need to install special zones in a real server. This is
3618 backwards compatible; if it can't find the fake resolver, it drops back.
3619 Thus, both old and new test suites can be run.
3621 TF/02 Added util/ratelimit.pl
3623 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3624 clock is set back in time.
3626 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3627 Candler <B.Candler@pobox.com>.
3629 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3630 OK for addresses that are the result of redirections.
3632 PH/48 A number of further additions for the benefit of the new test suite,
3633 including a fake gethostbyname() that interfaces to the fake DNS resolver
3636 TF/06 The fix for widen_domains has also been applied to qualify_single and
3637 search_parents which are the other dnslookup options that can cause
3640 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3643 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3645 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3646 service" if it encountered an MX record with an empty target hostname.
3647 The message is now "an MX or SRV record indicated no SMTP service".
3649 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3650 if the DNS of the sending site is misconfigured. This is quite a
3651 common situation. This change restores the behaviour of treating a
3652 helo verification defer as a failure.
3654 PH/51 If self=fail was set on a router, the bounce message did not include the
3655 actual error message.
3661 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3663 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3664 command itself ended in error, the underlying message about the transport
3665 filter timeout was being overwritten with the pipe command error. Now the
3666 underlying error message should be appended to the second error message.
3668 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3670 PH/02 Reduce the amount of output that "make" produces by default. Full output
3671 can still be requested.
3673 PH/03 The warning log line about a condition test deferring for a "warn" verb
3674 was being output only once per connection, rather than after each
3675 occurrence (because it was using the same function as for successful
3676 "warn" verbs). This seems wrong, so I have changed it.
3678 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3679 it should not have, which might have caused a crash in the right
3680 circumstances, but probably never did.
3682 PH/04 Installed a modified version of Tony Finch's patch to make submission
3683 mode fix the return path as well as the Sender: header line, and to
3684 add a /name= option so that you can make the user's friendly name appear
3687 TF/03 Added the control = fakedefer ACL modifier.
3689 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3690 Mark Lowes for thorough testing.
3692 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3694 TK/03 Merged latest SRS patch from Miles Wilton.
3696 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3697 with the definition in sysexits.h (which is #included earlier).
3698 Fortunately, Exim does not actually use EX_OK. The code used to try to
3699 preserve the sysexits.h value, by assuming that macro definitions were
3700 scanned for macro replacements. I have been disabused of this notion,
3701 so now the code just undefines EX_OK before #including unistd.h.
3703 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3704 in the smtp transport. When a block could not be written in a single
3705 write() function, the timeout was being re-applied to each part-write.
3706 This seems wrong - if the receiver was accepting one byte at a time it
3707 would take for ever. The timeout is now adjusted when this happens. It
3708 doesn't have to be particularly precise.
3710 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3711 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3713 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3714 without a domain if the check to <postmaster@domain> fails.
3716 SC/01 Eximstats: added -xls and the ability to specify output files
3717 (patch written by Frank Heydlauf).
3719 SC/02 Eximstats: use FileHandles for outputting results.
3721 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3723 SC/04 Eximstats: fixed display of large numbers with -nvr option
3725 SC/05 Eximstats: fixed merging of reports with empty tables.
3727 SC/06 Eximstats: added the -include_original_destination flag
3729 SC/07 Eximstats: removed tabs and trailing whitespace.
3731 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3733 TK/06 MBOX spool code: Add real "From " MBOX separator line
3734 so the .eml file is really in mbox format (even though
3735 most programs do not really care). Patch from Alex Miller.
3737 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3738 The latter is generated from $received_to and is only set if the
3739 message has one envelope recipient. SA can use these headers,
3740 obviously out-of-the-box. Patch from Alex Miller.
3742 PH/08 The ${def test on a variable was returning false if the variable's
3743 value was "0", contrary to what the specification has always said!
3744 The result should be true unless the variable is empty.
3746 PH/09 The syntax error of a character other than { following "${if
3747 def:variable_name" (after optional whitespace) was not being diagnosed.
3748 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3749 accidental colon was present, for example, could give incorrect results.
3751 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3752 result is used (not including appendfile, where other changes are about
3755 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3756 This involved changing a lot of size variables from int to off_t. It
3757 should work with maildirs and everything.
3759 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3760 spamd dying while we are connected to it.
3762 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3765 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3766 function for BDB 4.3.
3768 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3770 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3771 the sources for PCRE have been re-arranged and more files are now
3774 PH/15 The code I had for printing potentially long long variables in PH/11
3775 above was not the best (it lost precision). The length of off_t variables
3776 is now inspected at build time, and an appropriate printing format (%ld
3777 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3778 to be "long long int" or "long int". This is needed for the internal
3779 formatting function string_vformat().
3781 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3782 the configuration file to be ":syslog", then the script "guesses" where
3783 the logs files are, rather than using the compiled in default. In our
3784 case the guess is not the same as the compiled default, so the script
3785 suddenly stopped working when I started to use syslog. The patch checks
3786 to see if log_file_path is "". If so, it attempts to read it from exim
3787 with no configuration file to get the compiled in version, before it
3788 falls back to the previous guessing code."
3790 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3791 implementing BATV in an Exim configuration. See NewStuff for the gory
3794 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3795 Makefile that are specific to HP-UX.
3797 PH/18 If the "use_postmaster" option was set for a recipient callout together
3798 with the "random" option, the postmaster address was used as the MAIL
3799 FROM address for the random test, but not for the subsequent recipient
3800 test. It is now used for both.
3802 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3803 patch removes a few documentation additions to RFC 3028, because the
3804 latest draft now contains them. It adds the new en;ascii-case comparator
3805 and a new error check for 8bit text in MIME parts. Comparator and
3806 require names are now matched exactly. I enabled the subaddress
3807 extension, but it is not well tested yet (read: it works for me)."
3809 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3810 rework some of the code of TK/09 above to avoid the hardwired use of
3811 "%lld" and "long long". Replaced the call to snprintf() with a call to
3814 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3815 records point to non-existent hosts", "retry timeout exceeded", and
3816 "retry time not reached for any host after a long failure period".
3818 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3819 experimental DomainKeys support:
3821 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3822 (2) On an error such as an illegally used "control", the wrong name for
3823 the control was given.
3825 These problems did NOT occur unless DomainKeys support was compiled.
3827 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3829 PH/24 Added ${if match_ip condition.
3831 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3832 databases so that it will be absolutely obvious if a crash occurs in the
3833 DB library. This is a regular occurrence (often caused by mis-matched
3836 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3837 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3838 picked up on a user's system that detects such things. There doesn't seem
3839 to be a gcc warning option for this - only an attribute that has to be
3840 put on the function's prototype. It seems that in Fedora Core 4 they have
3841 set this on a number of new functions. No doubt there will be more in due
3844 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3845 specify a transport. However, if an address that was verified by such a
3846 router was the subject of a callout, Exim crashed because it tried to
3847 read the rcpt_include_affixes from the non-existent transport. Now it
3848 just assumes that the setting of that option is false. This bug was
3849 introduced by 4.51/PH/31.
3851 PH/28 Changed -d+all to exclude +memory, because that information is very
3852 rarely of interest, but it makes the output a lot bigger. People tend to
3853 do -d+all out of habit.
3855 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3856 code in os-type was giving problems when libc.so lives in lib64, like on
3859 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3860 aren't the modern standard, and it seems that some systems' include files
3861 don't always have them. Exim was already checking for some of the newer
3862 ones like T_AAAA, and defining it itself. I've added checks for all the
3863 record types that Exim uses.
3865 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3866 not automatically generating a new one, as it is supposed to. This
3867 prevented TLS from working. If the file did exist, but contained invalid
3868 data, a new version was generated, as expected. It was only the case of a
3869 non-existent file that was broken.
3871 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3872 with a change in libdomainkeys > 0.64.
3874 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3875 from DNS. If the selector record carries the flag, it now has
3876 precedence over the domain-wide flag.
3878 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3880 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3881 the use of a port name that isn't defined in /etc/services) occurred, the
3882 message was deferred as in a normal delivery, and thus remained on the
3883 spool, instead of being failed because of the mua_wrapper setting. This
3884 is now fixed, and I tidied up some of the mua_wrapper messages at the
3887 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3888 the messages in a hash of arrays rather than using individual hashes.
3889 This is a bit cleaner and results in dramatic memory savings, albeit
3890 at a slight CPU cost.
3892 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3893 as requested by Marc Sherman.
3895 SC/10 Eximstats: added histograms for user specified patterns as requested
3898 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3900 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3901 fopen() in the content-scanning modules that did not already have it.
3907 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3908 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3910 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3912 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3914 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3915 to test Sieve filters that use "vacation".
3917 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3918 that changes the way the GnuTLS parameters are stored in the cache file.
3919 The new format can be generated externally. For backward compatibility,
3920 if the data in the cache doesn't make sense, Exim assumes it has read an
3921 old-format file, and it generates new data and writes a new file. This
3922 means that you can't go back to an older release without removing the
3925 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3926 work if there are any delivery delays because "one_time" forces the
3927 parent to be marked "delivered", so its unseen clone is never tried
3928 again. For this reason, Exim now forbids the simultaneous setting of
3931 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3932 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3933 entry if you want to know the details. The fix, however, neglected to
3934 consider the case when local delivery batching is involved. The test for
3935 "previously delivered" was not happening when checking to see if an
3936 address could be batched with a previous (undelivered) one; under
3937 certain circumstances this could lead to multiple deliveries to the same
3940 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3941 in its include files, and this causes problems building Exim.
3943 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3944 header_syntax) but Exim was just ignoring anything given after a slash.
3945 In particular, this caused confusion with an attempt to use "verify =
3946 reverse_host_lookup/defer_ok". An error is now given when options are
3947 supplied for verify items that do not have them. (Maybe reverse_host_
3948 lookup should have a defer_ok option, but that's a different point.)
3950 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3951 defined by RFC 821) to 2048, because there were problems with some AUTH
3952 commands, and RFC 1869 says the size should be increased for extended
3953 SMTP commands that take arguments.
3955 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3958 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3959 "unknown" error; now it says that the functionality isn't in the binary.
3961 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3962 an address' error message when a string expansion fails (syntax or
3963 whatever). Otherwise the password may appear in the log. Following change
3964 PH/42 below, there is no longer a chance of it appearing in a bounce
3967 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3969 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3970 of its addresses was ever tried. (Bugzilla bug #2.)
3972 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3973 the result incorrectly in the debug output. (It correctly added a newline
3974 to what was transported.)
3976 TF/01 Added $received_time.
3978 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3979 commented out examples of how to interface to a virus scanner and to
3980 SpamAssassin. Also added commented examples of av_scanner and
3981 spamd_address settings.
3983 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3984 and controls are allowed in which ACLs. There were a couple of minor
3985 errors. Some of the entries in the conditions table (which is a table of
3986 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3987 negation of where the condition IS allowed.
3989 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3991 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3992 header file does not have a version number, so I've had to invent a new
3993 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3994 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3995 radiusclient), but it was contributed by a Radius user.
3997 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3998 files or directories, for OpenSSL.
4000 PH/19 When an Exim process that is running as root has to create an Exim log
4001 file, it does so in a subprocess that runs as exim:exim so as to get the
4002 ownership right at creation (otherwise, other Exim processes might see
4003 the file with the wrong ownership). There was no test for failure of this
4004 fork() call, which would lead to the process getting stuck as it waited
4005 for a non-existent subprocess. Forks do occasionally fail when resources
4006 run out. I reviewed all the other calls to fork(); they all seem to check
4009 PH/20 When checking for unexpected SMTP input at connect time (before writing
4010 the banner), Exim was not dealing correctly with a non-positive return
4011 from the read() function. If the client had disconnected by this time,
4012 the result was a log entry for a synchronization error with an empty
4013 string after "input=" when read() returned zero. If read() returned -1
4014 (an event I could not check), uninitialized data bytes were printed.
4015 There were reports of junk text (parts of files, etc) appearing after
4018 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4020 PH/22 Added support for macro redefinition, and (re)definition in between
4021 driver and ACL definitions.
4023 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4024 forgetting to use the resulting value; it was using the unexpanded value.
4026 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4027 hadn't been configured. The fix is from Juergen Kreileder, who
4028 understands it better than I do:
4030 "Here's what I see happening with three configured cyrus_sasl
4031 authenticators configured (plain, login, cram-md5):
4033 On startup auth_cyrus_sasl_init() gets called for each of these.
4034 This means three calls to sasl_listmech() without a specified mech_list.
4035 => SASL tests which mechs of all available mechs actually work
4036 => three warnings about OTP not working
4037 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4039 With the patch, sasl_listmech() also gets called three times. But now
4040 SASL's mech_list option is set to the server_mech specified in the the
4041 authenticator. Or in other words, the answer from sasl_listmech()
4042 gets limited to just the mech you're testing for (which is different
4044 => the return list contains just 'plain' or 'login', 'cram-md5' or
4045 nothing depending on the value of ob->server_mech.
4047 I've just tested the patch: Authentication still works fine,
4048 unavailable mechs specified in the exim configuration are still
4049 caught, and the auth.log warnings about OTP are gone."
4051 PH/25 When debugging is enabled, the contents of the command line are added
4052 to the debugging output, even when log_selector=+arguments is not
4055 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4056 answer is "GNU", and only if the return is "GNU/something" is the answer
4059 PH/27 $acl_verify_message is now set immediately after the failure of a
4060 verification in an ACL, and so is available in subsequent modifiers. In
4061 particular, the message can be preserved by coding like this:
4063 warn !verify = sender
4064 set acl_m0 = $acl_verify_message
4066 Previously, $acl_verify_message was set only while expanding "message"
4067 and "log_message" when a very denied access.
4069 PH/28 Modified OS/os.c-Linux with
4071 -#ifndef OS_LOAD_AVERAGE
4072 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4074 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4075 nomenclature these days.)
4077 PH/29 Installed patch from the Sieve maintainer that adds the options
4078 sieve_useraddress and sieve_subaddress to the redirect router.
4080 PH/30 In these circumstances:
4081 . Two addresses routed to the same list of hosts;
4082 . First host does not offer TLS;
4083 . First host accepts first address;
4084 . First host gives temporary error to second address;
4085 . Second host offers TLS and a TLS session is established;
4086 . Second host accepts second address.
4087 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4088 and peerdn, if requested) that were in fact used only for the second
4091 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4092 attention to any local part prefix or suffix that was matched by the
4093 router that accepted the address. It now behaves in the same way as it
4094 does for delivery: the affixes are removed from the local part unless
4095 rcpt_include_affixes is set on the transport.
4097 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4098 timeout during the DATA phase of an incoming message.
4100 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4101 applied a patch sanctioned by the Sieve maintainer.
4103 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4104 the uid or gid is negative. A case of a negative gid caused this to be
4105 noticed. The fix allows for either to be negative.
4107 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4108 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4111 PH/36 The change PH/12 above was broken. Fixed it.
4113 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4114 the grounds that routing the same address twice would always produce the
4115 same answer. This might have been true once, but it is certainly no
4116 longer true now. Routing a child address may depend on the previous
4117 routing that produced that child. Some complicated redirection strategies
4118 went wrong when messages had multiple recipients, and made Exim's
4119 behaviour dependent on the order in which the addresses were given.
4121 I have moved the duplicate checking until after the routing is complete.
4122 Exim scans the addresses that are assigned to local and remote
4123 transports, and removes any duplicates. This means that more work will be
4124 done, as duplicates will always all be routed, but duplicates are
4125 presumably rare, so I don't expect this is of any significance.
4127 For deliveries to pipes, files, and autoreplies, the duplicate checking
4128 still happens during the routing process, since they are not going to be
4131 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4132 It corrects a timeout issue with spamd. This is Ian's comment: "The
4133 background is that sometimes spamd either never reads data from a
4134 connection it has accepted, or it never writes response data. The exiscan
4135 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4136 blindly assumes that writes won't block so it may never time out."
4138 PH/39 Allow G after quota size as well as K and M.
4140 PH/40 The value set for $authenticated_id in an authenticator may not contain
4141 binary zeroes or newlines because the value is written to log lines and
4142 to spool files. There was no check on this. Now the value is run through
4143 the string_printing() function so that such characters are converted to
4144 printable escape sequences.
4146 PH/41 $message_linecount is a new variable that contains the total number of
4147 lines in the message. Compare $body_linecount, which is the count for the
4150 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4151 bounce and delay warning messages, except in certain special cases, which
4154 (a) An SMTP error message from a remote host;
4155 (b) A message specified in a :fail: redirection;
4156 (c) A message specified in a "fail" command in a system filter;
4157 (d) A message specified in a FAIL return from the queryprogram router;
4158 (e) A message specified by the cannot_route_message router option.
4160 In these cases only, Exim does include the error details in bounce and
4161 warning messages. There are also a few cases where bland messages such
4162 as "unrouteable address" or "local delivery error" are given.
4164 PH/43 $value is now also set for the "else" part of a ${run expansion.
4166 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4167 being worked on, but at least Exim now implements the latest version to
4170 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4171 process to complete was treated as a delivery failure, a timeout while
4172 writing the message to the pipe was logged, but erroneously treated as a
4173 successful delivery. Such timeouts include transport filter timeouts. For
4174 consistency with the overall process timeout, these timeouts are now
4175 treated as errors, giving rise to delivery failures by default. However,
4176 there is now a new Boolean option for the pipe transport called
4177 timeout_defer, which, if set TRUE, converts the failures into defers for
4178 both kinds of timeout. A transport filter timeout is now identified in
4181 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4182 systems where "make" and "gmake" are different, calling "gmake" at top
4183 level broke things. I've arranged for the value of $(MAKE) to be passed
4184 from the Makefile to this script so that it can call the same version of
4188 A note about Exim versions 4.44 and 4.50
4189 ----------------------------------------
4191 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4192 changes of various kinds. As a consequence, a big documentation update was
4193 needed. This delayed the release for rather longer than seemed good, especially
4194 in the light of a couple of (minor) security issues. Therefore, the changes
4195 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4196 release. So 4.44 and 4.50 are in effect two different branches that both start
4199 I have left the 4.50 change log unchanged; it contains all the changes since
4200 4.43. The change log for 4.44 is below; many of its items are identical to
4201 those for 4.50. This seems to be the most sensible way to preserve the
4202 historical information.
4208 1. Minor wording change to the doc/README.SIEVE file.
4210 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4211 computation of the current number of files was incorrect.
4213 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4214 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4217 4. Give more explanation in the error message when the command for a transport
4218 filter fails to execute.
4220 5. There are several places where Exim runs a non-Exim command in a
4221 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4222 was being done only for the command run by the queryprogram router. It is
4223 now done for all such subprocesses. The other cases are: ${run, transport
4224 filters, and the commands run by the lmtp and pipe transports.
4226 6. Added CONFIGURE_GROUP build-time option.
4228 7. Some older OS have a limit of 256 on the maximum number of file
4229 descriptors. Exim was using setrlimit() to set 1000 as a large value
4230 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4231 systems. I've change it so that if it can't get 1000, it tries for 256.
4233 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4234 was an oversight, and furthermore, ever since the addition of extra
4235 controls (e.g. 4.43/32), the checks on when to allow different forms of
4236 "control" were broken. There should now be diagnostics for all cases when a
4237 control that does not make sense is encountered.
4239 9. Added the /retain_sender option to "control=submission".
4241 10. $recipients is now available in the predata ACL (oversight).
4243 11. Tidy the search cache before the fork to do a delivery from a message
4244 received from the command line. Otherwise the child will trigger a lookup
4245 failure and thereby defer the delivery if it tries to use (for example) a
4246 cached ldap connection that the parent has called unbind on.
4248 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4249 of $address_data from the recipient verification was clobbered by the
4250 sender verification.
4252 13. The value of address_data from a sender verification is now available in
4253 $sender_address_data in subsequent conditions in the ACL statement.
4255 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4257 15. Added a new option "connect=<time>" to callout options, to set a different
4260 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4261 was its contents. (It was OK if the option was not defined at all.)
4263 17. A "Completed" log line is now written for messages that are removed from
4264 the spool by the -Mrm option.
4266 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4267 information about exactly what failed.
4269 19. Added -dd to debug only the daemon process.
4271 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4272 handles timeouts, both on the server side and network timeouts. Renamed the
4273 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4275 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4276 It is now set to "smtps".
4278 22. $host_address is now set to the target address during the checking of
4279 ignore_target_hosts.
4281 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4282 being passed; this would have caused $sender_host_name to have been used if
4283 matching the list had actually called for a host name (not very likely,
4284 since this list is usually IP addresses). A host name is now passed as
4287 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4288 code that specifies a non-restarting handler (typically sigaction() in
4289 modern systems) in an attempt to fix a rare and obscure crash bug.
4291 25. Narrowed the window for a race in the daemon that could cause it to ignore
4292 SIGCHLD signals. This is not a major problem, because they are used only to
4293 wake it up if nothing else does.
4295 26. A malformed maildirsize file could cause Exim to calculate negative values
4296 for the mailbox size or file count. Odd effects could occur as a result.
4297 The maildirsize information is now recalculated if the size or filecount
4300 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4301 support for a long time. Removed HAVE_SYS_VFS_H.
4303 28. Installed the latest version of exipick from John Jetmore.
4305 29. In an address list, if the pattern was not a regular expression, an empty
4306 subject address (from a bounce message) matched only if the pattern was an
4307 empty string. Non-empty patterns were not even tested. This was the wrong
4308 because it is perfectly reasonable to use an empty address as part of a
4309 database query. An empty address is now tested by patterns that are
4310 lookups. However, all the other forms of pattern expect the subject to
4311 contain a local part and a domain, and therefore, for them, an empty
4312 address still always fails if the pattern is not itself empty.
4314 30. Exim went into a mad DNS loop when attempting to do a callout where the
4315 host was specified on an smtp transport, and looking it up yielded more
4316 than one IP address.
4318 31. Re-factored the code for checking spool and log partition space into a
4319 function that finds that data and another that does the check. The former
4320 is then used to implement four new variables: $spool_space, $log_space,
4321 $spool_inodes, and $log_inodes.
4323 32. The RFC2047 encoding function was originally intended for short strings
4324 such as real names; it was not keeping to the 75-character limit for
4325 encoded words that the RFC imposes. It now respects the limit, and
4326 generates multiple encoded words if necessary. To be on the safe side, I
4327 have increased the buffer size for the ${rfc2047: expansion operator from
4330 33. It is now permitted to omit both strings after an "if" condition; if the
4331 condition is true, the result is "true". As before, when the second string
4332 is omitted, a false condition yields an empty string. This makes it less
4333 cumbersome to write custom ACL and router conditions.
4335 34. Failure to deliver a bounce message always caused it to be frozen, even if
4336 there was an errors_to setting on the router. The errors_to setting is now
4339 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4340 canonical form (fully expanded) before being placed in
4341 $sender_host_address.
4343 36. The table in the code that translates DNS record types into text (T_A to
4344 "A" for instance) was missing entries for NS and CNAME. It is just possible
4345 that this could have caused confusion if both these types were looked up
4346 for the same domain, because the text type is used as part of Exim's
4347 per-process caching. But the chance of anyone hitting this buglet seems
4350 37. The dnsdb lookup has been extended in a number of ways.
4352 (1) There is a new type, "zns", which walks up the domain tree until it
4353 finds some nameserver records. It should be used with care.
4355 (2) There is a new type, "mxh", which is like "mx" except that it returns
4356 just the host names, not the priorities.
4358 (3) It is now possible to give a list of domains (or IP addresses) to be
4359 looked up. The behaviour when one of the lookups defers can be
4360 controlled by a keyword.
4362 (4) It is now possible to specify the separator character for use when
4363 multiple records are returned.
4365 38. The dnslists ACL condition has been extended: it is now possible to supply
4366 a list of IP addresses and/or domains to be looked up in a particular DNS
4369 39. Added log_selector=+queue_time_overall.
4371 40. When running the queue in the test harness, wait just a tad after forking a
4372 delivery process, to get repeatability of debugging output.
4374 41. Include certificate and key file names in error message when GnuTLS fails
4375 to set them up, because the GnuTLS error message doesn't include the name
4376 of the failing file when there is a problem reading it.
4378 42. Allow both -bf and -bF in the same test run.
4380 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4382 44. The "Exiscan patch" is now merged into the mainline Exim source.
4384 45. Sometimes the final signoff response after QUIT could fail to get
4385 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4386 < 0 before doing a fflush(). This bug looks as though it goes back to the
4387 introduction of TLS in release 3.20, but "sometimes" must have been rare
4388 because the tests only now provoked it.
4390 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4391 (this can affect the format of dates).
4393 47. exim_tidydb, when checking for the continued existence of a message for
4394 which it has found a message-specific retry record, was not finding
4395 messages that were in split spool directories. Consequently, it was
4396 deleting retry records that should have stayed in existence.
4398 48. Steve fixed some bugs in eximstats.
4400 49. The SPA authentication driver was not abandoning authentication and moving
4401 on to the next authenticator when an expansion was forced to fail,
4402 contradicting the general specification for all authenticators. Instead it
4403 was generating a temporary error. It now behaves as specified.
4405 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4406 (the order specifies the preference for clients). The order is now AES256,
4407 AES128, 3DES, ARCFOUR128.
4409 51. Small patch to Sieve code - explicitly set From: when generating an
4412 52. Exim crashed if a remote delivery caused a very long error message to be
4413 recorded - for instance if somebody sent an entire SpamAssassin report back
4414 as a large number of 550 error lines. This bug was coincidentally fixed by
4415 increasing the size of one of Exim's internal buffers (big_buffer) that
4416 happened as part of the Exiscan merge. However, to be on the safe side, I
4417 have made the code more robust (and fixed the comments that describe what
4420 53. Now that there can be additional text after "Completed" in log lines (if
4421 the queue_time_overall log selector is set), a one-byte patch to exigrep
4422 was needed to allow it to recognize "Completed" as not the last thing in
4425 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4426 patch that reportedly fixes this has been added. I am not expert enough to
4427 create a test for it. This is what the patch creator wrote:
4429 "I found a little strange behaviour of ldap code when working with
4430 Windows 2003 AD Domain, where users was placed in more than one
4431 Organization Units. When I tried to give exim partial DN, the exit code
4432 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4433 But simultaneously result of request was absolutely normal ldap result,
4434 so I produce this patch..."
4436 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4437 REFERENCE, so I have modified the code to exclude the patch when that macro
4440 55. Some experimental protocols are using DNS PTR records for new purposes. The
4441 keys for these records are domain names, not reversed IP addresses. The
4442 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4443 leaves it alone. Component reversal etc. now happens only for IP addresses.
4446 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4448 57. Double the size of the debug message buffer (to 2048) so that more of very
4449 long debug lines gets shown.
4451 58. The exicyclog utility now does better if the number of log files to keep
4452 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4454 59. Two changes related to the smtp_active_hostname option:
4456 (1) $smtp_active_hostname is now available as a variable.
4457 (2) The default for smtp_banner uses $smtp_active_hostname instead
4458 of $primary_hostname.
4460 60. The host_aton() function is supposed to be passed a string that is known
4461 to be a valid IP address. However, in the case of IPv6 addresses, it was
4462 not checking this. This is a hostage to fortune. Exim now panics and dies
4463 if the condition is not met. A case was found where this could be provoked
4464 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4465 components; fortuitously, this particular loophole had already been fixed
4466 by change 4.50/55 above.
4468 If there are any other similar loopholes, the new check in host_aton()
4469 itself should stop them being exploited. The report I received stated that
4470 data on the command line could provoke the exploit when Exim was running as
4471 exim, but did not say which command line option was involved. All I could
4472 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4473 running as the user.
4476 61. There was a buffer overflow vulnerability in the SPA authentication code
4477 (which came originally from the Samba project). I have added a test to the
4478 spa_base64_to_bits() function which I hope fixes it.
4481 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4482 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4484 63. The daemon start-up calls getloadavg() while still root for those OS that
4485 need the first call to be done as root, but it missed one case: when
4486 deliver_queue_load_max is set with deliver_drop_privilege. This is
4487 necessary for the benefit of the queue runner, because there is no re-exec
4488 when deliver_drop_privilege is set.
4490 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4491 This has been fixed.
4493 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4494 was in use, was not putting the data itself into the right store pool;
4495 consequently, it could be overwritten for a subsequent message in the same
4496 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4499 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4501 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4502 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4503 the function were treating the return as a boolean value, which happened to
4504 work because 0=false and not-0=true, but is not correct code.
4506 68. The host_aton() function was not handling scoped IPv6 addresses (those
4507 with, for example, "%eth0" on the end) correctly.
4509 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4510 negated items (that is, ~something) in unsigned ints. Some compilers
4511 apparently mutter when there is no cast.
4513 70. If an address verification called from an ACL failed, and did not produce a
4514 user-specific message (i.e. there was only a "system" message), nothing was
4515 put in $acl_verify_message. In this situation, it now puts the system
4518 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4519 session; change 4.31/43 added the unwanted input to the log line - except
4520 that it did not do this in the start of session case. It now does.
4522 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4523 This is wrong and can cause the other end to generate a synchronization
4524 error if it is another Exim or anything else that does the synchronization
4525 check. A QUIT command is no longer sent after a timeout.
4527 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4528 during host lookups.
4530 74. The defer_ok option of callout verification was not working if it was used
4531 when verifying addresses in header lines, that is, for this case:
4533 verify = header_sender/callout=defer_ok
4535 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4536 those file descriptors could be used for SMTP connections. If anything
4537 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4538 could be sent to the SMTP client, causing chaos. The daemon now opens
4539 stdin, stdout, and stderr to /dev/null when it puts itself into the
4542 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4543 log by default. The user can override this with suitable Perl magic.
4545 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4546 the log message when discard triggers, was not working for the DATA ACL or
4547 for the non-SMTP ACL.
4549 78. Error message wording change in sieve.c.
4551 79. If smtp_accept_max_per_host was set, the number of connections could be
4552 restricted to fewer than expected, because the daemon was trying to set up
4553 a new connection before checking whether the processes handling previous
4554 connections had finished. The check for completed processes is now done
4555 earlier. On busy systems, this bug wouldn't be noticed because something
4556 else would have woken the daemon, and it would have reaped the completed
4559 80. If a message was submitted locally by a user whose login name contained one
4560 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4561 It caused a spool format error. I have fixed the spool reading code. A
4562 related problem was that the "from" clause in the Received: line became
4563 illegal because of the space(s). It is now covered by ${quote_local_part.
4565 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4568 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4570 83. Patch from Sieve maintainer to fix unterminated string problem in
4571 "vacation" handling.
4573 84. Some minor changes to the Linux configuration files to help with other
4574 OS variants using glibc.
4576 85. One more patch for Sieve to update vacation handling to latest spec.
4579 ----------------------------------------------------
4580 See the note above about the 4.44 and 4.50 releases.
4581 ----------------------------------------------------
4587 1. Change 4.43/35 introduced a bug that caused file counts to be
4588 incorrectly computed when quota_filecount was set in an appendfile
4591 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4592 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4595 3. Give more explanation in the error message when the command for a transport
4596 filter fails to execute.
4598 4. There are several places where Exim runs a non-Exim command in a
4599 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4600 was being done only for the command run by the queryprogram router. It is
4601 now done for all such subprocesses. The other cases are: ${run, transport
4602 filters, and the commands run by the lmtp and pipe transports.
4604 5. Some older OS have a limit of 256 on the maximum number of file
4605 descriptors. Exim was using setrlimit() to set 1000 as a large value
4606 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4607 systems. I've change it so that if it can't get 1000, it tries for 256.
4609 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4610 was an oversight, and furthermore, ever since the addition of extra
4611 controls (e.g. 4.43/32), the checks on when to allow different forms of
4612 "control" were broken. There should now be diagnostics for all cases when a
4613 control that does not make sense is encountered.
4615 7. $recipients is now available in the predata ACL (oversight).
4617 8. Tidy the search cache before the fork to do a delivery from a message
4618 received from the command line. Otherwise the child will trigger a lookup
4619 failure and thereby defer the delivery if it tries to use (for example) a
4620 cached ldap connection that the parent has called unbind on.
4622 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4623 of $address_data from the recipient verification was clobbered by the
4624 sender verification.
4626 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4627 was its contents. (It was OK if the option was not defined at all.)
4629 11. A "Completed" log line is now written for messages that are removed from
4630 the spool by the -Mrm option.
4632 12. $host_address is now set to the target address during the checking of
4633 ignore_target_hosts.
4635 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4636 being passed; this would have caused $sender_host_name to have been used if
4637 matching the list had actually called for a host name (not very likely,
4638 since this list is usually IP addresses). A host name is now passed as
4641 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4642 code that specifies a non-restarting handler (typically sigaction() in
4643 modern systems) in an attempt to fix a rare and obscure crash bug.
4645 15. Narrowed the window for a race in the daemon that could cause it to ignore
4646 SIGCHLD signals. This is not a major problem, because they are used only to
4647 wake it up if nothing else does.
4649 16. A malformed maildirsize file could cause Exim to calculate negative values
4650 for the mailbox size or file count. Odd effects could occur as a result.
4651 The maildirsize information is now recalculated if the size or filecount
4654 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4655 support for a long time. Removed HAVE_SYS_VFS_H.
4657 18. Updated exipick to current release from John Jetmore.
4659 19. Allow an empty sender to be matched against a lookup in an address list.
4660 Previously the only cases considered were a regular expression, or an
4663 20. Exim went into a mad DNS lookup loop when doing a callout where the
4664 host was specified on the transport, if the DNS lookup yielded more than
4667 21. The RFC2047 encoding function was originally intended for short strings
4668 such as real names; it was not keeping to the 75-character limit for
4669 encoded words that the RFC imposes. It now respects the limit, and
4670 generates multiple encoded words if necessary. To be on the safe side, I
4671 have increased the buffer size for the ${rfc2047: expansion operator from
4674 22. Failure to deliver a bounce message always caused it to be frozen, even if
4675 there was an errors_to setting on the router. The errors_to setting is now
4678 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4679 canonical form (fully expanded) before being placed in
4680 $sender_host_address.
4682 24. Updated eximstats to version 1.33
4684 25. Include certificate and key file names in error message when GnuTLS fails
4685 to set them up, because the GnuTLS error message doesn't include the name
4686 of the failing file when there is a problem reading it.
4688 26. Expand error message when OpenSSL has problems setting up cert/key files.
4691 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4692 (this can affect the format of dates).
4694 28. exim_tidydb, when checking for the continued existence of a message for
4695 which it has found a message-specific retry record, was not finding
4696 messages that were in split spool directories. Consequently, it was
4697 deleting retry records that should have stayed in existence.
4699 29. eximstats updated to version 1.35
4700 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4701 1.35 - bugfix such that pie charts by volume are generated correctly
4703 30. The SPA authentication driver was not abandoning authentication and moving
4704 on to the next authenticator when an expansion was forced to fail,
4705 contradicting the general specification for all authenticators. Instead it
4706 was generating a temporary error. It now behaves as specified.
4708 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4709 (the order specifies the preference for clients). The order is now AES256,
4710 AES128, 3DES, ARCFOUR128.
4712 31. Small patch to Sieve code - explicitly set From: when generating an
4715 32. Exim crashed if a remote delivery caused a very long error message to be
4716 recorded - for instance if somebody sent an entire SpamAssassin report back
4717 as a large number of 550 error lines. This bug was coincidentally fixed by
4718 increasing the size of one of Exim's internal buffers (big_buffer) that
4719 happened as part of the Exiscan merge. However, to be on the safe side, I
4720 have made the code more robust (and fixed the comments that describe what
4723 33. Some experimental protocols are using DNS PTR records for new purposes. The
4724 keys for these records are domain names, not reversed IP addresses. The
4725 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4726 leaves it alone. Component reversal etc. now happens only for IP addresses.
4729 34. The host_aton() function is supposed to be passed a string that is known
4730 to be a valid IP address. However, in the case of IPv6 addresses, it was
4731 not checking this. This is a hostage to fortune. Exim now panics and dies
4732 if the condition is not met. A case was found where this could be provoked
4733 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4734 components; fortuitously, this particular loophole had already been fixed
4735 by change 4.50/55 or 4.44/33 above.
4737 If there are any other similar loopholes, the new check in host_aton()
4738 itself should stop them being exploited. The report I received stated that
4739 data on the command line could provoke the exploit when Exim was running as
4740 exim, but did not say which command line option was involved. All I could
4741 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4742 running as the user.
4745 35. There was a buffer overflow vulnerability in the SPA authentication code
4746 (which came originally from the Samba project). I have added a test to the
4747 spa_base64_to_bits() function which I hope fixes it.
4750 36. The daemon start-up calls getloadavg() while still root for those OS that
4751 need the first call to be done as root, but it missed one case: when
4752 deliver_queue_load_max is set with deliver_drop_privilege. This is
4753 necessary for the benefit of the queue runner, because there is no re-exec
4754 when deliver_drop_privilege is set.
4756 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4757 was in use, was not putting the data itself into the right store pool;
4758 consequently, it could be overwritten for a subsequent message in the same
4759 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4762 38. Sometimes the final signoff response after QUIT could fail to get
4763 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4764 < 0 before doing a fflush(). This bug looks as though it goes back to the
4765 introduction of TLS in release 3.20, but "sometimes" must have been rare
4766 because the tests only now provoked it.
4772 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4773 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4774 Now it returns an integer. A number of calls were still expecting a T/F
4775 return. Fortuitously, in all cases, the tests worked in OK situations,
4776 which is the norm. However, things would have gone wrong on any write
4777 failures on the smtp file descriptor. This function is used when sending
4778 messages over SMTP and also when doing verify callouts.
4780 2. When Exim is called to do synchronous delivery of a locally submitted
4781 message (the -odf or -odi options), it no longer closes stderr before doing
4784 3. Implemented the mua_wrapper option.
4786 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4788 5. Implemented the functions header_remove(), header_testname(),
4789 header_add_at_position(), and receive_remove_recipient(), and exported them
4792 6. If an ACL "warn" statement specified the addition of headers, Exim already
4793 inserted X-ACL-Warn: at the start if there was no header name. However, it
4794 was not making this test for the second and subsequent header lines if
4795 there were newlines in the string. This meant that an invalid header could
4796 be inserted if Exim was badly configured.
4798 7. Allow an ACL "warn" statement to add header lines at the start or after all
4799 the Received: headers, as well as at the end.
4801 8. Added the rcpt_4xx retry error code.
4803 9. Added postmaster_mailfrom=xxx to callout verification option.
4805 10. Added mailfrom=xxxx to the callout verification option, for verify=
4808 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4809 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4811 12. Inserted some casts to stop certain compilers warning when using pointer
4812 differences as field lengths or precisions in printf-type calls (mostly
4813 affecting debugging statements).
4815 13. Added optional readline() support for -be (dynamically loaded).
4817 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4818 same clock tick as a message's arrival, so that its received time was the
4819 same as the "first fail" time on the retry record, and that message
4820 remained on the queue past the ultimate address timeout, every queue runner
4821 would try a delivery (because it was past the ultimate address timeout) but
4822 after another failure, the ultimate address timeout, which should have then
4823 bounced the address, did not kick in. This was a "< instead of <=" error;
4824 in most cases the first failure would have been in the next clock tick
4825 after the received time, and all would be well.
4827 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4828 being recognized when the domain list was tested by the match_domain
4829 condition in an expansion string.
4831 16. Added the ${str2b64: operator.
4833 17. Exim was always calling setrlimit() to set a large limit for the number of
4834 processes, without checking whether the existing limit was already
4835 adequate. (It did check for the limit on file descriptors.) Furthermore,
4836 errors from getrlimit() and setrlimit() were being ignored. Now they are
4837 logged to the main and panic logs, but Exim does carry on, to try to do its
4838 job under whatever limits there are.
4840 18. Imported PCRE 5.0.
4842 19. Trivial typo in log message " temporarily refused connection" (the leading
4845 20. If the log selector return_path_on_delivery was set and an address was
4846 redirected to /dev/null, the delivery process crashed because it assumed
4847 that a return path would always be set for a "successful" delivery. In this
4848 case, the whole delivery is bypassed as an optimization, and therefore no
4851 21. Internal re-arrangement: the function for sending a challenge and reading
4852 a response while authentication was assuming a zero-terminated challenge
4853 string. It's now changed to take a pointer and a length, to allow for
4854 binary data in such strings.
4856 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4858 23. Exim was not respecting finduser_retries when seeking the login of the
4859 uid under which it was called; it was always trying 10 times. (The default
4860 setting of finduser_retries is zero.) Also, it was sleeping after the final
4861 failure, which is pointless.
4863 24. Implemented tls_on_connect_ports.
4865 25. Implemented acl_smtp_predata.
4867 26. If the domain in control=submission is set empty, Exim assumes that the
4868 authenticated id is a complete email address when it generates From: or
4869 Sender: header lines.
4871 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4872 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4873 chown and chgrp in /bin and hostname in /usr/bin.
4875 28. Exim was keeping the "process log" file open after each use, just as it
4876 does for the main log. This opens the possibility of it remaining open for
4877 long periods when the USR1 signal hits a daemon. Occasional processlog
4878 errors were reported, that could have been caused by this. Anyway, it seems
4879 much more sensible not to leave this file open at all, so that is what now
4882 29. The long-running daemon process does not normally write to the log once it
4883 has entered its main loop, and it closes the log before doing so. This is
4884 so that log files can straightforwardly be renamed and moved. However,
4885 there are a couple of unusual error situations where the daemon does write
4886 log entries, and I had neglected to close the log afterwards.
4888 30. The text of an SMTP error response that was received during a remote
4889 delivery was being truncated at 512 bytes. This is too short for some of
4890 the long messages that one sometimes sees. I've increased the limit to
4893 31. It is now possible to make retry rules that apply only when a message has a
4894 specific sender, in particular, an empty sender.
4896 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4897 it possible to be selective about when SMTP synchronization is enforced.
4899 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4901 32. Implemented hosts_connection_nolog.
4903 33. Added an ACL for QUIT.
4905 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4908 35. Added mailbox_size and mailbox_filecount to appendfile.
4910 36. Added control = no_multiline_responses to ACLs.
4912 37. There was a bug in the logic of the code that waits for the clock to tick
4913 in the case where the clock went backwards by a substantial amount such
4914 that the microsecond fraction of "now" was more than the microsecond
4915 fraction of "then" (but the whole seconds number was less).
4917 38. Added support for the libradius Radius client library this is found on
4918 FreeBSD (previously only the radiusclient library was supported).
4924 1. When certain lookups returned multiple values in the form name=value, the
4925 quoting of the values was not always being done properly. Specifically:
4926 (a) If the value started with a double quote, but contained no whitespace,
4928 (b) If the value contained whitespace other than a space character (i.e.
4929 tabs or newlines or carriage returns) it was not quoted.
4930 This fix has been applied to the mysql and pgsql lookups by writing a
4931 separate quoting function and calling it from the lookup code. The fix
4932 should probably also be applied to nisplus, ibase and oracle lookups, but
4933 since I cannot test any of those, I have not disturbed their existing code.
4935 2. A hit in the callout cache for a specific address caused a log line with no
4936 reason for rejecting RCPT. Now it says "Previous (cached) callout
4937 verification failure".
4939 3. There was an off-by-one bug in the queryprogram router. An over-long
4940 return line was truncated at 256 instead of 255 characters, thereby
4941 overflowing its buffer with the terminating zero. As well as fixing this, I
4942 have increased the buffer size to 1024 (and made a note to document this).
4944 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4945 when Exim is waiting for an SMTP response from a remote server, Exim
4946 restarts its select() call on the socket, thereby resetting its timeout.
4947 This is not a problem when such interrupts are rare. Somebody set up a cron
4948 job to run exiwhat every 2 minutes, which is less than the normal select()
4949 timeout (5 or 10 minutes). This meant that the select() timeout never
4950 kicked in because it was always reset. I have fixed this by comparing the
4951 time when an interrupt arrives with the time at the start of the first call
4952 to select(). If more time than the timeout has elapsed, the interrupt is
4953 treated as a timeout.
4955 5. Some internal re-factoring in preparation for the addition of Sieve
4956 extensions (by MH). In particular, the "personal" test is moved to a
4957 separate function, and given an option for scanning Cc: and Bcc: (which is
4958 not set for Exim filters).
4960 6. When Exim created an email address using the login of the caller as the
4961 local part (e.g. when creating a From: or Sender: header line), it was not
4962 quoting the local part when it contained special characters such as @.
4964 7. Installed new OpenBSD configuration files.
4966 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4967 try to make them clearer.
4969 9. Callout options, other than the timeout value, were being ignored when
4970 verifying sender addresses in header lines. For example, when using
4972 verify = header_sender/callout=no_cache
4974 the cache was (incorrectly) being used.
4976 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4977 only the Cygwin environment.
4979 11. When return_path_on_delivery was set as a log selector, if different remote
4980 addresses in the same message used different return paths and parallel
4981 remote delivery occurred, the wrong values would sometimes be logged.
4982 (Whenever a remote delivery process finished, the return path value from
4983 the most recently started remote delivery process was logged.)
4985 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4986 lines when AUTH and/or TLS are in use. This is the "received protocol"
4987 field. Exim used to use "asmtp" for authenticated SMTP, without any
4988 indication (in the protocol name) for TLS use. Now it follows the RFC and
4989 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4990 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4991 names appear in log lines as well as in Received: header lines.
4993 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4994 extensions, and comparison tests, and to fix some bugs.
4996 14. Changes to the "personal" filter test:
4998 (1) The test was buggy in that it was just doing the equivalent of
4999 "contains" tests on header lines. For example, if a user's address was
5000 anne@some.where, the "personal" test would incorrectly be true for
5002 To: susanne@some.where
5004 This test is now done by extracting each address from the header in turn,
5005 and checking the entire address. Other tests that are part of "personal"
5006 are now done using regular expressions (for example, to check local parts
5007 of addresses in From: header lines).
5009 (2) The list of non-personal local parts in From: addresses has been
5010 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5011 taken from the Sieve specification recommendations.
5013 (3) If the message contains any header line starting with "List-" it is
5014 treated as non-personal.
5016 (4) The test for "circular" in the Subject: header line has been removed
5017 because it now seems ill-conceived.
5019 15. Minor typos in src/EDITME comments corrected.
5021 16. Installed latest exipick from John Jetmore.
5023 17. If headers_add on a router specified a text string that was too long for
5024 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5025 of string_sprintf() is now avoided.
5027 18. $message_body_size was not set (it was always zero) when running the DATA
5028 ACL and the local_scan() function.
5030 19. For the "mail" command in an Exim filter, no default was being set for
5031 the once_repeat time, causing a random time value to be used if "once" was
5032 specified. (If the value happened to be <= 0, no repeat happened.) The
5033 default is now 0s, meaning "never repeat". The "vacation" command was OK
5034 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5035 (I found it when inspecting the code).
5037 20. There is now an overall timeout for performing a callout verification. It
5038 defaults to 4 times the callout timeout, which applies to individual SMTP
5039 commands during the callout. The overall timeout applies when there is more
5040 than one host that can be tried. The timeout is checked before trying the
5041 next host. This prevents very long delays if there are a large number of
5042 hosts and all are timing out (e.g. when the network connections are timing
5043 out). The value of the overall timeout can be changed by specifying an
5044 additional sub-option for "callout", called "maxwait". For example:
5046 verify = sender/callout=5s,maxwait=20s
5048 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5049 to the end before writing, but this should make it even safer).
5051 22. Exim was forgetting that it had advertised PIPELINING for the second and
5052 subsequent messages on an SMTP connection. It was also not resetting its
5053 memory on STARTTLS and an internal HELO.
5055 23. When Exim logs an SMTP synchronization error within a session, it now
5056 records whether PIPELINING has been advertised or not.
5058 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5059 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5060 rather than long int.
5062 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5064 26. Added the never_mail option to autoreply.
5070 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5071 crash if the getsockname() call failed; this can happen if a connection is
5072 closed very soon after it is established. The problem was simply in the
5073 order in which certain operations were done, causing Exim to try to write
5074 to the SMTP stream before it had set up the file descriptor. The bug has
5075 been fixed by making things happen in the correct order.
5081 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5082 before the connection was closed, thus losing the rejection response.
5084 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5085 some early Solaris releases, but causes trouble in current releases where
5086 socklen_t is defined.
5088 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5091 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5094 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5095 that releasing the top of it at the end releases what was used for sub-
5096 expansions (unless the block got too big). However, discard this block if
5097 the first thing is a variable or header, so that we can use its block when
5098 it is dynamic (useful for very large $message_headers, for example).
5100 6. Lookups now cache *every* query, not just the most recent. A new, separate
5101 store pool is used for this. It can be recovered when all lookup caches are
5102 flushed. Lookups now release memory at the end of their result strings.
5103 This has involved some general refactoring of the lookup sources.
5105 7. Some code has been added to the store_xxx() functions to reduce the amount
5106 of flapping under certain conditions.
5108 8. log_incoming_interface used to affect only the <= reception log lines. Now
5109 it causes the local interface and port to be added to several more SMTP log
5110 lines, for example "SMTP connection from", and rejection lines.
5112 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5114 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5116 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5117 could be overwritten at the end of the current message (or the start of a
5118 new message if it was set in a HELO ACL). The value is now preserved for
5119 the duration of the SMTP connection.
5121 12. If a transport had a headers_rewrite setting, and a matching header line
5122 contained an unqualified address, that address was qualified, even if it
5123 did not match any rewriting rules. The underlying bug was that the values
5124 of the flags that permit the existence of unqualified sender and recipient
5125 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5126 non-local messages, and by -bnq for local messages) were not being
5127 preserved with the message after it was received.
5129 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5130 "next input=" as part of the text comprising the host identity instead of
5131 the correct text. The code was using the same buffer for two different
5132 strings. However, depending on which order the printing function evaluated
5133 its arguments, the bug did not always show up. Under Linux, for example, my
5134 test suite worked just fine.
5136 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5137 doesn't work with some older versions of Perl. It has been changed to "my",
5138 which in any case is probably the better facility to use.
5140 15. A really picky compiler found some instances of statements for creating
5141 error messages that either had too many or two few arguments for the format
5144 16. The size of the buffer for calls to the DNS resolver has been increased
5145 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5146 for addresses that have a lot of PTR records. This alleviates a problem; it
5147 does not fully solve it.
5149 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5150 buffer now truncates the list and logs the incident, which is the same
5151 action as happens when Exim is looking up a host name and its aliases.
5152 Previously in this situation something unpredictable would happen;
5153 sometimes it was "internal error: store_reset failed".
5155 18. If a server dropped the connection unexpectedly when an Exim client was
5156 using GnuTLS and trying to read a response, the client delivery process
5157 crashed while trying to generate an error log message.
5159 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5160 string, for example:
5162 warn message = H1: something\nH2: something
5164 the text was added as a single header line from Exim's point of view
5165 though it ended up OK in the delivered message. However, searching for the
5166 second and subsequent header lines using $h_h2: did not work. This has been
5167 fixed. Similarly, if a system filter added multiple headers in this way,
5168 the routers could not see them.
5170 20. Expanded the error message when iplsearch is called with an invalid key to
5171 suggest using net-iplsearch in a host list.
5173 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5174 ACLs are no longer actually imposed (and a message to that effect is
5177 22. If a "gecos" field in a passwd entry contained escaped characters, in
5178 particular, if it contained a \" sequence, Exim got it wrong when building
5179 a From: or a Sender: header from that name. A second bug also caused
5180 incorrect handling when an unquoted " was present following a character
5181 that needed quoting.
5183 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5184 was not being matched caselessly.
5186 24. Arranged for all hyphens in the exim.8 source to be escaped with
5189 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5190 properly. Recipient callout cache records were still being keyed to include
5191 the sender, even when use_sender was set false. This led to far more
5192 callouts that were necessary. The sender is no longer included in the key
5193 when use_sender is false.
5195 26. Added "control = submission" modifier to ACLs.
5197 27. Added the ${base62d: operator to decode base 62 numbers.
5199 28. dnsdb lookups can now access SRV records.
5201 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5202 the configuration file.
5204 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5205 (-v) mode. This makes the output for a verbose queue run more intelligible.
5207 31. Added a use_postmaster feature to recipient callouts.
5209 32. Added the $body_zerocount variable, containing the number of binary zero
5210 bytes in the message body.
5212 33. The time of last modification of the "new" subdirectory is now used as the
5213 "mailbox time last read" when there is a quota error for a maildir
5216 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5218 35. Added +ignore_unknown as a special item in host lists.
5220 36. Code for decoding IPv6 addresses in host lists is now included, even if
5221 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5222 address was recognized as an IP address, but was then not correctly decoded
5223 into binary, causing unexpected and incorrect effects when compared with
5230 1. Very minor rewording of debugging text in manualroute to say "list of
5231 hosts" instead of "hostlist".
5233 2. If verify=header_syntax was set, and a header line with an unqualified
5234 address (no domain) and a large number of spaces between the end of the
5235 name and the colon was received, the reception process suffered a buffer
5236 overflow, and (when I tested it) crashed. This was caused by some obsolete
5237 code that should have been removed. The fix is to remove it!
5239 3. When running in the test harness, delay a bit after writing a bounce
5240 message to get a bit more predictability in the log output.
5242 4. Added a call to search_tidyup() just before forking a reception process. In
5243 theory, someone could use a lookup in the expansion of smtp_accept_max_
5244 per_host which, without the tidyup, could leave open a database connection.
5246 5. Added the variables $recipient_data and $sender_data which get set from a
5247 lookup success in an ACL "recipients" or "senders" condition, or a router
5248 "senders" option, similar to $domain_data and $local_part_data.
5250 6. Moved the writing of debug_print from before to after the "senders" test
5253 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5254 problems for message scanning, either using a data ACL, or using
5255 local_scan() because the Received: header was not generated till after they
5256 were called (in order to set the time as the time of reception completion).
5257 I have revised the way this works. The header is now generated after the
5258 body is received, but before the ACL or local_scan() are called. After they
5259 are run, the timestamp in the header is updated.
5265 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5266 before starting a queue runner without re-exec. This happened only when
5267 deliver_drop_privilege was set or when the Exim user was set to root. The
5268 effect of the bug was that timeouts during subsequent deliveries caused
5269 crashes instead of being properly handled. The handler is now left at its
5270 default (and expected) setting.
5272 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5273 message, again when deliver_drop_privilege is set or Exim is run as root.
5274 The bug described in (1) was not present in this case, but the tidying up
5275 of the other signals was missing. I have made the two cases consistent.
5277 3. The ignore_target_hosts setting on a manualroute router was being ignored
5278 for hosts that were looked up using the /MX notation.
5280 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5283 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5284 operated on the sender address. After changing the $sender_address to <>
5285 for the sender address verify, Exim was re-instated it as the original
5286 (before rewriting) address, but remembering that it had rewritten it, so it
5287 wasn't rewriting it again. This bug also had the effect of breaking the
5288 sender address verification caching when the sender address was rewritten.
5290 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5291 This has been changed so that if the ip literal address matches
5292 ignore_target_hosts, the router declines.
5294 7. Added expansion conditions match_domain, match_address, and match_local_
5295 part (NOT match_host).
5297 8. The placeholder for the Received: header didn't have a length field set.
5299 9. Added code to Exim itself and to exim_lock to test for a specific race
5300 condition that could lead to file corruption when using MBX delivery. The
5301 issue is with the lockfile that is created in /tmp. If this file is removed
5302 after a process has opened it but before that process has acquired a lock,
5303 there is the potential for a second process to recreate the file and also
5304 acquire a lock. This could lead to two Exim processes writing to the file
5305 at the same time. The added code performs the same test as UW imapd; it
5306 checks after acquiring the lock that its file descriptor still refers to
5307 the same named file.
5309 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5310 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5313 11. Added the smtp_active_hostname option. If used, this will typically be made
5314 to depend on the incoming interface address. Because $interface_address is
5315 not set up until the daemon has forked a reception process, error responses
5316 that can happen earlier (such as "too many connections") no longer contain
5319 12. If an expansion in a condition on a "warn" statement fails because a lookup
5320 defers, the "warn" statement is abandoned, and the next ACL statement is
5321 processed. Previously this caused the whole ACL to be aborted.
5323 13. Added the iplsearch lookup type.
5325 14. Added ident_timeout as a log selector.
5327 15. Added tls_certificate_verified as a log selector.
5329 16. Added a global option tls_require_ciphers (compare the smtp transport
5330 option of the same name). This controls incoming TLS connections.
5332 17. I finally figured out how to make tls_require_ciphers do a similar thing
5333 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5334 before starting the TLS session.
5336 18. Tabs are now shown as \t in -bP output.
5338 19. If the log selector return_path_on_delivery was set, Exim crashed when
5339 bouncing a message because it had too many Received: header lines.
5341 20. If two routers both had headers_remove settings, and the first one included
5342 a superfluous trailing colon, the final name in the first list and the
5343 first name in the second list were incorrectly joined into one item (with a
5344 colon in the middle).
5350 1. Added -C and -D options to the exinext utility, mainly to make it easier
5351 to include in the automated testing, but these could be helpful when
5352 multiple configurations are in use.
5354 2. The exinext utility was not formatting the output nicely when there was
5355 an alternate port involved in the retry record key, nor when there was a
5356 message id as well (for retries that were specific to a specific message
5357 and a specific host). It was also confused by IPv6 addresses, because of
5358 the additional colons they contain. I have fixed the IPv4 problem, and
5359 patched it up to do a reasonable job for IPv6.
5361 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5362 delivery, the log line now contains "pipelined" if PIPELINING was used.
5364 4. An SMTP transport process used to panic and die if the bind() call to set
5365 an explicit outgoing interface failed. This has been changed; it is now
5366 treated in the same way as a connect() failure.
5368 5. A reference to $sender_host_name in the part of a conditional expansion
5369 that was being skipped was still causing a DNS lookup. This no longer
5372 6. The def: expansion condition was not recognizing references to header lines
5373 that used bh_ and bheader_.
5375 7. Added the _cache feature to named lists.
5377 8. The code for checking quota_filecount in the appendfile transport was
5378 allowing one more file than it should have been.
5380 9. For compatibility with Sendmail, the command line option
5388 and sets the incoming protocol and host name (for trusted callers). The
5389 host name and its colon can be omitted when only the protocol is to be set.
5390 Note the Exim already has two private options, -pd and -ps, that refer to
5391 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5392 "s", but I don't think that's a major issue.
5394 10. A number of refactoring changes to the code, none of which should affect
5397 (a) The number of logging options was getting close to filling up the
5398 32-bit word that was used as a bit map. I have split them into two classes:
5399 those that are passed in the argument to log_write(), and those that are
5400 only ever tested independently outside of that function. These are now in
5401 separate 32-bit words, so there is plenty of room for expansion again.
5402 There is no change in the user interface or the logging behaviour.
5404 (b) When building, for example, log lines, the code previously used a
5405 macro that called string_cat() twice, in order to add two strings. This is
5406 not really sufficiently general. Furthermore, there was one instance where
5407 it was actually wrong because one of the argument was used twice, and in
5408 one call a function was used. (As it happened, calling the function twice
5409 did not affect the overall behaviour.) The macro has been replaced by a
5410 function that can join an arbitrary number of extra strings onto a growing
5413 (c) The code for expansion conditions now uses a table and a binary chop
5414 instead of a serial search (which was left over from when there were very
5415 few conditions). Also, it now recognizes conditions like "pam" even when
5416 the relevant support is not compiled in: a suitably worded error message is
5417 given if an attempt is made to use such a condition.
5419 11. Added ${time_interval:xxxxx}.
5421 12. A bug was causing one of the ddress fields not to be passed back correctly
5422 from remote delivery subprocesses. The field in question was not being
5423 subsequently used, so this caused to problems in practice.
5425 13. Added new log selectors queue_time and deliver_time.
5427 14. Might have fixed a bug in maildirsizefile handling that threw up
5428 "unexpected character" debug warnings, and recalculated the data
5429 unnecessarily. In any case, I expanded the warning message to give more
5432 15. Added the message "Restricted characters in address" to the statements in
5433 the default ACL that block characters like @ and % in local parts.
5435 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5436 Three changes have been made:
5438 (a) There was a serious bug; a negative response to MAIL caused the whole
5439 recipient domain to be cached as invalid, thereby blocking all messages
5440 to all local parts at the same domain, from all senders. This bug has
5441 been fixed. The domain is no longer cached after a negative response to
5442 MAIL if the sender used is not empty.
5444 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5447 (c) A new callout option, "use_sender" has been added for people who want
5448 the modified behaviour.
5454 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5457 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5458 indeed breaks things for older releases.
5460 3. Added additional logging to the case where there is a problem reading data
5461 from a filter that is running in a subprocess using a pipe, in order to
5462 try to track down a specific problem.
5464 4. Testing facility fudge: when running in the test harness and attempting
5465 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5466 getting "No route to host". Convert this to a timeout.
5468 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5471 6. Some OS don't have socklen_t but use size_t instead. This affects the
5472 fifth argument of getsockopt() amongst other things. This is now
5473 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5474 can be set for individual OS. I have set it for SunOS5, OSF1, and
5475 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5476 some earlier ones do not.
5478 7. Change 4.30/15 was not doing the test caselessly.
5480 8. The standard form for an IPv6 address literal was being rejected by address
5481 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5482 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5483 this, as well as the form without the "IPv6" on the front (but only when
5484 address literals are enabled, of course).
5486 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5488 10. Exim crashed if a message with an empty sender address specified by -f
5489 encountered a router with an errors_to setting. This could be provoked only
5490 by a command such as
5494 where an empty string was supplied; "<>" did not hit this bug.
5496 11. Installed PCRE release 4.5.
5498 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5499 remained set. It is now erased.
5501 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5502 times from message ids (which are base 36 rather than the normal 62).
5504 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5505 were being counted as actual protocol errors, and logged if the log
5506 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5507 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5508 and DATA following a set of rejected RCPTs do not count as protocol errors.
5509 In other words, Exim assumes they were pipelined, though this may not
5510 actually be the case. Of course, in all cases the client gets an
5511 appropriate error code.
5513 15. If a lookup fails in an ACL condition, a message about the failure may
5514 be available; it is used if testing the ACL cannot continue, because most
5515 such messages specify what the cause of the deferral is. However, some
5516 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5517 that caused an old message to be retained and used if a later statement
5518 caused a defer, replacing the real cause of the deferral.
5520 16. If an IP address had so many PTR records that the DNS lookup buffer
5521 was not large enough to hold them, Exim could crash while trying to process
5522 the truncated data. It now detects and logs this case.
5524 17. Further to 4.21/58, another change has been made: if (and only if) the
5525 first line of a message (the first header line) ends with CRLF, a bare LF
5526 in a subsequent header line has a space inserted after it, so as not to
5527 terminate the header.
5529 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5530 unnecessarily, used atoi() instead of strtol(), and didn't check the
5531 termination when getting file sizes from file names by regex.
5533 19. Completely re-implemented the support for maildirsize files, in the light
5534 of a number of problems with the previous contributed implementation
5535 (4.30/29). In particular:
5537 . If the quota is zero, the maildirsize file is maintained, but no quota is
5540 . If the maildir directory does not exist, it is created before any attempt
5541 to write a maildirsize file.
5543 . The quota value in the file is just a cache; if the quota is changed in
5544 the transport, the new value overrides.
5546 . A regular expression is available for excluding directories from the
5549 20. The autoreply transport checks the characters in options that define the
5550 message's headers; it allows continued headers, but it was checking with
5551 isspace() after an embedded newline instead of explicitly looking for a
5554 21. If all the "regular" hosts to which an address was routed had passed their
5555 expiry times, and had not reached their retry times, the address was
5556 bounced, even if fallback hosts were defined. Now Exim should go on to try
5559 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5560 equivalent code in the SMTP transport. Some hosts send humungous responses
5561 to HELO/EHLO, more than 1024 it seems.
5563 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5564 gives compiler warnings in some environments. I've now done it "properly",
5567 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5568 (because of problems with the built-in one) was declared to return uschar *
5569 instead of char *, causing compiler failure.
5571 25. Fixed a file descriptor leak when processing alias/forward files.
5573 26. Fixed a minor format string issue in dbfn.c.
5575 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5577 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5578 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5581 29. When a sender address is verified, it is cached, to save repeating the test
5582 when there is more than one recipient in a message. However, when the
5583 verification involves a callout, it is possible for different callout
5584 options to be set for different recipients. It is too complicated to keep
5585 track of this in the cache, so now Exim always runs a verification when a
5586 callout is required, relying on the callout cache for the optimization.
5587 The overhead is duplication of the address routing, but this should not be
5590 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5591 to be verified with callout=postmaster, and the main callout worked but the
5592 postmaster check failed, the verification correctly failed. However, if a
5593 subsequent RCPT command asked for sender verification *without* the
5594 postmaster check, incorrect caching caused this verification also to fail,
5597 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5598 it was not caching the DNS options (qualify_single, search_parents) that
5599 were used when the lookup failed. A subsequent lookup with different
5600 options therefore always gave the same answer, though there were cases
5601 where it should not have. (Example: a "domains = !$mx_any" option on a
5602 dnslookup router: the "domains" option is always processed without any
5603 widening, but the router might have qualify_single set.) Now Exim uses the
5604 cached value only when the same options are set.
5606 32. Added John Jetmore's "exipick" utility to the distribution.
5608 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5609 than a timeout (e.g. a certificate is required, and is not provided), an
5610 Exim server now closes the connection immediately. Previously it waited for
5611 the client to close - but if the client is SSL, it seems that they each
5612 wait for each other, leading to a delay before one of them times out.
5614 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5615 maintained 0.8.x compatibility because I don't think many are using it, and
5616 it is clearly obsolete.
5618 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5621 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5622 client certificate was expired. A simple patch fixes this, though I don't
5623 understand the full logic of why the verify callback is called multiple
5626 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5627 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5628 which causes problems with some clients (such as the Certicom SSL Plus
5629 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5630 disables the coutermeasure allowing Eudora to connect."
5632 38. Exim was not checking that a write() to a log file succeeded. This could
5633 lead to Bad Things if a log got too big, in particular if it hit a file
5634 size limit. Exim now panics and dies if it cannot write to a log file, just
5635 as it does if it cannot open a log file.
5637 39. Modified OS/Makefile-Linux so that it now contains
5639 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5641 The two -D definitions ensure that Exim is compiled with large file
5642 support, which makes it possible to handle log files that are bigger than
5645 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5646 instance) a domain was checked against a named list that involved a lookup,
5647 causing $domain_data to be set, then another domain was checked against the
5648 same list, then the first domain was re-checked, the value of $domain_data
5649 after the final check could be wrong. In particular, if the second check
5650 failed, it could be set empty. This bug probably also applied to
5653 41. The strip_trailing_dot option was not being applied to the address given
5654 with the -f command-line option.
5656 42. The code for reading a message's header from the spool was incrementing
5657 $received_count, but never initializing it. This meant that the value was
5658 incorrect (doubled) while delivering a message in the same process in which
5659 it was received. In the most common configuration of Exim, this never
5660 happens - a fresh exec is done - but it can happen when
5661 deliver_drop_privilege is set.
5663 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5664 it now includes up to 150 characters of the unexpected data in the log
5667 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5668 and building data strings. The size of both of these buffers was 10 000
5669 bytes - far larger than anybody would *ever* want, thought I. Needless to
5670 say, somebody hit the limit. I have increased the maximum line length to
5671 20 000 and the maximum data length of concatenated lines to 100 000. I have
5672 also fixed two bugs, because there was no checking on these buffers. Tsk,
5673 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5674 buffer is too small.
5676 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5677 lsearch lookups. Now it does.
5679 46. When parsing a route_list item in a manualroute router, a fixed-length
5680 buffer was used for the list of hosts. I made this 1024 bytes long,
5681 thinking that nobody would ever have a list of hosts that long. Wrong.
5682 Somebody had a whole pile of complicated expansion conditions, and the
5683 string was silently truncated, leading to an expansion error. It turns out
5684 that it is easier to change to an unlimited length (owing to other changes
5685 that have happened since this code was originally written) than to build
5686 structure for giving a limitation error. The length of the item that
5687 expands into the list of hosts is now unlimited.
5689 47. The lsearch lookup could not handle data where the length of text line was
5690 more than 4095 characters. Such lines were truncated, leading to shortened
5691 data being returned. It should now handle lines of any length.
5693 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5694 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5697 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5698 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5699 no longer happens in comment lines. A list of replacements is now placed
5700 at the head of all of the source files, except those whose only change is
5701 to replace PERL_COMMAND in the very first #! line.
5703 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5704 messages on the queue, with a bottom-up merge sort, using code contributed
5705 by Michael Haardt. This should make operations like -bp somewhat faster on
5706 large queues. It won't affect queue runners, except when queue_run_in_order
5709 51. Installed eximstats 1.31 in the distribution.
5711 52. Added support for SRV lookups to the dnslookup router.
5713 53. If an ACL referred to $message_body or $message_body_end, the value was not
5714 reset for any messages that followed in the same SMTP session.
5716 54. The store-handling optimization for building very long strings was not
5717 differentiating between the different store pools. I don't think this
5718 actually made any difference in practice, but I've tidied it.
5720 55. While running the routers to verify a sender address, $sender_address
5721 was still set to the sender address. This is wrong, because when routing to
5722 send a bounce to the sender, it would be empty. Therefore, I have changed
5723 it so that, while verifying a sender address, $sender_address is set to <>.
5724 (There is no change to what happens when verifying a recipient address.)
5726 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5727 target A or AAAA records (if not already returned) without resetting the
5728 qualify_single or search_parents options of the DNS resolver. These are
5729 inappropriate in this case because the targets of MX and SRV records must
5730 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5731 target that, when qualified, matched something in the local domain. These
5732 two options are now turned off when doing these lookups.
5734 57. It seems that at least some releases of Reiserfs (which does not have the
5735 concept of a fixed number of inodes) returns zero and not -1 for the
5736 number of available inodes. This interacted badly with check_spool_inodes,
5737 which assumed that -1 was the "no such thing" setting. What I have done is
5738 to check that the total number of inodes is greater than zero before doing
5739 the test of how many are available.
5741 58. When a "warn" ACL statement has a log_message modifier, the message is
5742 remembered, and not repeated. This is to avoid a lot of repetition when a
5743 message has many recipients that cause the same warning to be written.
5744 However, Exim was preserving the list of already written lines for an
5745 entire SMTP session, which doesn't seem right. The memory is now reset if a
5746 new message is started.
5748 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5749 debugging output unless log_rewrite was also set.
5751 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5752 of (int)(handle) when we know that handle contains (void *)(-1).
5754 61. The Exim daemon panic-logs an error return when it closes the incoming
5755 connection. However "connection reset by peer" seems to be common, and
5756 isn't really an error worthy of noting specially, so that particular error
5759 62. When Exim is trying to find all the local interfaces, it used to panic and
5760 die if the ioctl to get the interface flags failed. However, it seems that
5761 on at least one OS (Solaris 9) it is possible to have an interface that is
5762 included in the list of interfaces, but for which you get a failure error
5763 for this call. This happens when the interface is not "plumbed" into a
5764 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5765 failure of the "get flags" call assumes that the interface is down.
5767 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5768 makes life easier for people who are doing arithmetic on fields extracted
5769 from dates, where you often get leading zeros that should not be
5770 interpreted as octal.
5772 64. Added qualify_domain to the redirect router, to override the global
5775 65. If a pathologically long header line contained very many addresses (the
5776 report of this problem mentioned 10 000) and each of them was rewritten,
5777 Exim could use up a very large amount of memory. (It kept on making new
5778 copies of the header line as it rewrote, and never released the old ones.)
5779 At the expense of a bit more processing, the header rewriting function has
5780 been changed so that it no longer eats memory in this way.
5782 66. The generation of the Received: header has been moved from the time that a
5783 message starts to be received, to the time that it finishes. The timestamp
5784 in the Received: header should now be very close to that of the <= log
5785 line. There are two side-effects of this change:
5787 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5788 logged header lines no longer include the local Received: line, because
5789 it has not yet been created. The same applies to a copy of the message
5790 that is returned to a non-SMTP sender when a message is rejected.
5792 (b) When a filter file is tested using -bf, no additional Received: header
5793 is added to the test message. After some thought, I decided that this
5796 This change does not affect the value of $received_for. It is still set
5797 after address rewriting, but before local_scan() is called.
5799 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5801 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5802 gave an unhelpful panic error message, and a defer error. I have managed to
5803 change this behaviour so that it now rejects any supplied certificate,
5804 which seems right, as the list of acceptable certificates is empty.
5806 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5807 gave an unhelpful defer error. I have not managed to make this reject any
5808 supplied certificates, but the error message it gives is "no certificate
5809 supplied", which is not helpful.
5811 70. exigrep's output now also includes lines that are not associated with any
5812 message, but which match the given pattern. Implemented by a patch from
5813 Martin Sluka, which also tidied up the Perl a bit.
5815 71. Recipient callout verification, like sender verification, was using <> in
5816 the MAIL FROM command. This isn't really the right thing, since the actual
5817 sender may affect whether the remote host accepts the recipient or not. I
5818 have changed it to use the actual sender in the callout; this means that
5819 the cache record is now keyed on a recipient/sender pair, not just the
5820 recipient address. There doesn't seem to be a real danger of callout loops,
5821 since a callout by the remote host to check the sender would use <>.
5822 [SEE ABOVE: changed after hitting problems.]
5824 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5825 temporary errors. However, in the case of such a code being given after
5826 the end of a data transmission (i.e. after ".") Exim was failing to write
5827 a retry record for the message. (Yes, there was some broken host that was
5828 actually sending 8xx at this point.)
5830 73. An unknown lookup type in a host list could cause Exim to panic-die when
5831 the list was checked. (An example that provoked this was putting <; in the
5832 middle of a list instead of at the start.) If this happened during a DATA
5833 ACL check, a -D file could be left lying around. This kind of configuration
5834 error no longer causes Exim to die; instead it causes a defer error. The
5835 incident is still logged to the main and panic logs.
5837 74. Buglet left over from Exim 3 conversion. The message "too many messages
5838 in one connection" was written to the rejectlog but not the mainlog, except
5839 when address rewriting (yes!) was being logged.
5841 75. Added write_rejectlog option.
5843 76. When a system filter was run not as root (that is, when system_filter_user
5844 was set), the values of the $n variables were not being returned to the
5845 main process; thus, they were not subsequently available in the $sn
5848 77. Added +return_path_on_delivery log selector.
5850 78. A connection timeout was being treated differently from recipients deferred
5851 when testing hosts_max_try with a message that was older than the host's
5852 retry timeout. (The host should not be counted, thus allowing all hosts to
5853 be tried at least once before bouncing.) This may have been the cause of an
5854 occasionally reported bug whereby a message would remain on the queue
5855 longer than the retry timeout, but would be bounced if a delivery was
5856 forced. I say "may" because I never totally pinned down the problem;
5857 setting up timeout/retry tests is difficult. See also the next item.
5859 79. The ultimate address timeout was not being applied to errors that involved
5860 a combination of host plus message (for example, a timeout on a MAIL
5861 command). When an address resolved to a number of possible hosts, and they
5862 were not all tried for each delivery (e.g. because of hosts_max_try), a
5863 message could remain on the queue longer than the retry timeout.
5865 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5868 81. Fixed an obscure SMTP outgoing bug which required at least the following
5869 conditions: (a) there was another message waiting for the same server;
5870 (b) the server returned 5xx to all RCPT commands in the first message so
5871 that the message was not completed; (c) the server dropped the connection
5872 or gave a negative response to the RSET that Exim sends to abort the
5873 transaction. The observed case was a dropped connection after DATA that had
5874 been sent in pipelining mode. That is, the server had advertised PIPELINING
5875 but was not implementing it correctly. The effect of the bug was incorrect
5876 behaviour, such as trying another host, and this could lead to a crash.
5882 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5883 and daemon.c were passed as pointers to ints; they should have been
5884 pointers to socklen_t variables (which are typically unsigned ints).
5886 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5889 3. Fixed a really odd bug that affected only the testing scheme; patching a
5890 certain fixed string in the binary changed the value of another string that
5891 happened to be identical to the end of the original first string.
5893 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5894 name", it returns that address as the IP address. On some operating
5895 systems (e.g. Solaris), it also passes back the IP address string as the
5896 "host name". However, on others (e.g. Linux), it passes back an empty
5897 string. Exim wasn't checking for this, and was changing the host name to an
5898 empty string, assuming it had been canonicalized.
5900 5. Although rare, it is permitted to have more than one PTR record for a given
5901 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5902 all the names associated with an address, because they do in Solaris.
5903 However, it seems that they do not in Linux for data that comes from the
5904 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5905 I found this out when I moved to a new Linux workstation and tried to run
5906 the Exim test suite.
5908 To get round this problem I have changed the code so that it now does its
5909 own call to the DNS to look up PTR records when searching for a host name.
5910 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5911 addresses that are only in /etc/hosts are still found.
5913 This behaviour is, however, controlled by an option called host_lookup_
5914 order, which defaults to "bydns:byaddr". If people want to use the other
5915 order, or indeed, just use one or the other means of lookup, they can
5916 specify it in this variable.
5918 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5919 some operating systems, this comes back from gethostbyaddr() as an empty
5920 string, and this is what Exim used to test for. However, it seems that in
5921 other systems, "." is yielded. Exim now tests for this case too.
5923 7. The values of check_spool_space and check_log_space are now held internally
5924 as a number of kilobytes instead of an absolute number of bytes. If a
5925 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5926 kilobyte. This means that much larger values can be stored.
5928 8. Exim monitor: an attempt to get the action menu when not actually pointing
5929 at a message produces an empty menu entitled "No message selected". This
5930 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5931 no entries in it ("Shell widget menu has zero width and/or height"). So I
5932 have added a single, blank menu entry in this case.
5934 9. Added ${quote_local_part.
5936 10. MIME decoding is now applied to the contents of Subject: header lines when
5939 11. Now that a reference to $sender_host_address automatically causes a reverse
5940 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5941 host lookup before query-style lookups in lists that might use this
5942 variable. This has therefore been abolished, and the "net-" prefix is no
5943 longer necessary for query-style lookups.
5945 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5946 have been a typo for LFLAGS, so it has been changed.
5948 13. The install script calls Exim with "-C /dev/null" in order to find the
5949 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5950 to be output. However, since Exim outputs its version number before the
5951 error, it didn't break the script. It just looked ugly. I fixed this by
5952 always allowing "-C /dev/null" if the caller is root.
5954 14. Ignore overlarge ACL variable number when reading spool file - insurance
5955 against a later release with more variables having written the file.
5957 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5958 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5959 this, as well as the form without the "IPv6" on the front.
5961 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5962 OS/Makefile-Darwin file.
5964 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5965 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5967 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5968 variable. However, some OS use ints for inodes. I've added cast to long int
5969 to get rid of the compiler warning.
5971 19. I had forgotten to lock out "/../" in configuration file names when
5972 ALT_CONFIG_PREFIX was set.
5974 20. Routers used for verification do not need to specify transports. However,
5975 if such a router generated a host list, and callout was configured, Exim
5976 crashed, because it could not find a port number from the (non-existent)
5977 transport. It now assumes port 25 in this circumstance.
5979 21. Added the -t option to exigrep.
5981 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5982 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5983 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5984 them is set, LOOKUP_LSEARCH is forced.
5986 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5988 24. Added sender and host information to the "rejected by local_scan()" log
5989 line; previously there was no indication of these.
5991 25. Added .include_if_exists.
5993 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5994 Linux. It turns out that not all file systems support this. Apparently some
5995 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5996 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5997 not supported on the file descriptor, is now ignored when Exim is trying to
5998 sync a directory. This applies only to Linux.
6000 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6002 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6003 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6006 29. Added support for maildirsize files from supplied patch (modified a bit).
6008 30. The use of :fail: followed by an empty string could lead Exim to respond to
6009 sender verification failures with (e.g.):
6011 550 Verification failed for <xxx>
6012 550 Sender verify failed
6014 where the first response line was missing the '-' that indicates it is not
6015 the final line of the response.
6017 31. The loop for finding the name of the user that called Exim had a hardwired
6018 limit of 10; it now uses the value of finduser_retries, which is used for
6019 all other user lookups.
6021 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6024 33. Exim was neglecting to zero errno before one call of strtol() when
6025 expanding a string and expecting an integer value. On some systems this
6026 resulted in spurious "integer overflow" errors. Also, it was casting the
6027 result into an int without checking.
6029 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6030 did not work. The code looks as if it has *never* worked, though it appears
6031 to have been documented since at least release 1.62. I have made it work.
6033 35. The "timeout_DNS" error in retry rules, also documented since at least
6034 1.62, also never worked. As it isn't clear exactly what this means, and
6035 clearly it isn't a major issue, I have abolished the feature by treating it
6036 as "timeout", and writing a warning to the main and panic logs.
6038 36. The display of retry rules for -brt wasn't always showing the error code
6041 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6042 timeout_connect_A, timeout_connect_MX.
6044 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6045 to the empty sender.
6047 39. The daemon was not analysing the content of -oX till after it had closed
6048 stderr and disconnected from the controlling terminal. This meant that any
6049 syntax errors were only noted on the panic log, and the return code from
6050 the command was 0. By re-arranging the code a little, I've made the
6051 decoding happen first, so such errors now appear on stderr, and the return
6052 code is 1. However, the actual setting up of the sockets still happens in
6053 the disconnected process, so errors there are still only recorded on the
6056 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6057 connections (as happens on some IP stacks) was logged at start up time as
6058 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6059 it from "IPv6 and IPv4", which means that two separate sockets are being
6062 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6063 says whether AF_INET or AF_INET6 was passed as an argument.
6065 42. Exiwhat output was messed up when time zones were included in log
6068 43. Exiwhat now gives more information about the daemon's listening ports,
6069 and whether -tls-on-connect was used.
6071 44. The "port" option of the smtp transport is now expanded.
6073 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6074 silently ignored. Now an error message is written to the main and panic
6077 46. There's a new ACL modifier called "logwrite" which writes to a log file
6078 as soon as it is encountered.
6080 47. Added $local_user_uid and $local_user_gid at routing time.
6082 48. Exim crashed when trying to verify a sender address that was being
6085 49. Exim was recognizing only a space character after ".include". It now also
6086 recognizes a tab character.
6088 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6089 extracting the relevant information from the specification. The man page no
6090 longer contains scrambled data for the -d option, and I've added a section
6091 at the front about calling Exim under different names.
6093 51. Added "extra_headers" argument to the "mail" command in filter files.
6095 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6098 53. Installed eximstats 1.29.
6100 54. Added transport_filter_timeout as a generic transport option.
6102 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6103 Cc: header lines. This was required by RFC 822, but it not required by RFC
6106 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6107 incoming messages that did not have them. Now it does so only if the
6108 message originates locally, that is, if there is no associated remote host
6109 address. When Resent- header lines are present, this applies to the Resent-
6110 lines rather than the non-Resent- lines.
6112 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6113 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6115 58. Messages for configuration errors now include the name of the main
6116 configuration file - useful now that there may be more than one file in a
6117 list (.included file names were always shown).
6119 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6120 for those rare installations that do not start the daemon as root or run it
6121 setuid root. I've cut out the call to initgroups() if the daemon is not
6124 60. The Exim user and group can now be bound into the binary as text strings
6125 that are looked up at the start of Exim's processing.
6127 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6129 62. Added $mailstore_basename variable.
6131 63. Installed patch to sieve.c from Michael Haardt.
6133 64. When Exim failed to open the panic log after failing to open the main log,
6134 the original message it was trying to log was written to stderr and debug
6135 output, but if they were not available (the usual case in production), it
6136 was lost. Now it is written to syslog before the two lines that record the
6137 failures to open the logs.
6139 65. Users' Exim filters run in subprocesses under the user's uid. It is
6140 possible for a "deliver" command or an alias in a "personal" command to
6141 provoke an address rewrite. If logging of address rewriting is configured,
6142 this fails because the process is not running as root or exim. There may be
6143 a better way of dealing with this, but for the moment (because 4.30 needs
6144 to be released), I have disabled address rewrite logging when running a
6145 filter in a non-root, non-exim process.
6151 1. The buildconfig auxiliary program wasn't quoting the value set for
6152 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6153 not defined. This bug was masked in 4.22 by the effect that was fixed in
6156 2. Some messages that were rejected after a message id was allocated were
6157 shown as "incomplete" by exigrep. It no longer does this for messages that
6158 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6160 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6161 have allow_domain_literals set, the ID did not get logged in the <= line.
6162 Domain literals are now always recognized in Message-ID: header lines.
6164 4. The first argument for a ${extract expansion item is the key name or field
6165 number. Leading and trailing spaces in this item were not being ignored,
6166 causing some misleading effects.
6168 5. When deliver_drop_privilege was set, single queue runner processes started
6169 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6170 same command in the process it spins off) were not dropping privilege.
6172 6. When the daemon running as "exim" started a queue runner, it always
6173 re-executed Exim in the spun-off process. This is a waste of effort when
6174 deliver_drop_privilege is set. The new process now just calls the
6175 queue-runner function directly.
6181 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6184 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6185 ignored. Though the use of -oP was forcing the writing of a pid file, it
6186 was always written to the default place.
6188 3. If the message "no IP address found for host xxxx" is generated during
6189 incoming verification, it is now followed by identification of the incoming
6190 connection (so you can more easily find what provoked it).
6192 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6194 5. Added some features to "harden" Exim a bit more against certain attacks:
6196 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6197 be put in Local/Makefile. This is like the never_users runtime option,
6198 but it cannot be overridden. The default setting is "root".
6200 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6201 prefix string with which any file named in a -C command line option
6204 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6205 is retained for -C and -D only if the caller of Exim is root. Without
6206 it, the exim user may also use -C and -D and retain privilege.
6208 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6209 command line option is disabled.
6211 6. Macro names set by the -D option must start with an upper case letter, just
6212 like macro names defined in the configuration file.
6214 7. Added "dereference=" facility to LDAP.
6216 8. Two instances of the typo "uknown" in the source files are fixed.
6218 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6219 the Configure-Makefile script screwed up while processing it.
6221 10. Incorporated PCRE 4.4.
6223 11. The SMTP synchronization check was not operating right at the start of an
6224 SMTP session. For example, it could not catch a HELO sent before the client
6225 waited for the greeting. There is now a check for outstanding input at the
6226 point when the greeting is written. Because of the duplex, asynchronous
6227 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6228 way, but not yet received, when the check is performed.
6230 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6231 on TCP/IP sockets, because this apparently causes some broken clients to
6234 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6235 unchanged) from the Cygwin maintainer.
6237 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6238 was supported instead of testing for mbx. Effectively a typo.
6240 15. The spa authenticator server code was not checking that the input it
6241 received was valid base64.
6243 16. The debug output line for the "set" modifier in ACLs was not showing the
6244 name of the variable that was being set.
6246 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6248 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6249 lookup on its own. Something else was needed to trigger the lookup. For
6250 example, a match in host_lookup or the need for a host name in a host list.
6251 Now, if $sender_host_name is referenced and the host name has not yet been
6252 looked up, a lookup is performed. If the lookup fails, the variable remains
6253 empty, and $host_lookup_failed is set to "1".
6255 19. Added "eqi" as a case-independent comparison operator.
6257 20. The saslauthd authentication condition could segfault if neither service
6258 nor realm was specified.
6260 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6261 error message that was logged was misleading, and incoming SMTP
6262 connections were dropped. The message is now more accurate, and temporary
6263 errors are given to SMTP connections.
6265 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6266 (except RSET) with a 421 error, until QUIT is received. However, it was
6267 failing to send a response to QUIT.
6269 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6270 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6271 ACL is now run after the helo_try_verify_hosts code.
6273 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6274 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6275 case-independent, so other case variants are also recognized). Apparently
6276 some systems use these upper case variants.
6278 25. If more than two messages were waiting for the same host, and a transport
6279 filter was specified for the transport, Exim sent two messages over the
6280 same TCP/IP connection, and then failed with "socket operation on non-
6281 socket" when it tried to send the third.
6283 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6285 27. The extern definition of crypt16() in expand.c was not being excluded when
6286 the OS had its own crypt16() function.
6288 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6289 as a preferred synonym for return_size_limit, both as an option and as an
6292 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6294 30. Changed the default configuration ACL to relax the local part checking rule
6295 for addresses that are not in any local domains. For these addresses,
6296 slashes and pipe symbols are allowed within local parts, but the sequence
6297 /../ is explicitly forbidden.
6299 31. SPA server authentication was not clearing the challenge buffer before
6302 32. log_message in a "warn" ACL statement was writing to the reject log as
6303 well as to the main log, which contradicts the documentation and doesn't
6304 seem right (because no rejection is happening). So I have stopped it.
6306 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6307 However, I am unable to do any testing of this.
6309 34. Fixed an infelicity in the appendfile transport. When checking directories
6310 for a mailbox, to see if any needed to be created, it was accidentally
6311 using path names with one or more superfluous leading slashes; tracing
6312 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6314 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6315 contents are added to the log line that is written for every discarded
6316 recipient. (Previously a log_message setting was ignored.)
6318 36. The ${quote: operator now quotes the string if it is empty.
6320 37. The install script runs exim in order to find its version number. If for
6321 some reason other than non-existence or emptiness, which it checks, it
6322 could not run './exim', it was installing it with an empty version number,
6323 i.e. as "exim-". This error state is now caught, and the installation is
6326 38. An argument was missing from the function that creates an error message
6327 when Exim fails to connect to the socket for saslauthd authentication.
6328 This could cause Exim to crash, or give a corrupted message.
6330 39. Added isip, isip4, and isip6 to ${if conditions.
6332 40. The ACL variables $acl_xx are now saved with the message, and can be
6333 accessed later in routers, transports, and filters.
6335 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6336 strings in the file are not string-expanded.
6338 42. If a MAIL command specified a SIZE value that was too large to fit into an
6339 int variable, the check against message_size_limit failed. Such values are
6340 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6341 day this will have to be increased, but I don't think I want to be around
6342 when emails are that large.
6349 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6350 iconv() is not standard in FreeBSD.
6352 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6353 IPv6 enabled. The observed symptom was a segmentation fault on return from
6354 the function os_common_find_running_interfaces() in src/os.c.
6356 3. In the check_special_case() function in daemon.c I had used "errno" as an
6357 argument name, which causes warnings on some systems. This was basically a
6358 typo, since it was named "eno" in the comments!
6360 4. The code that waits for the clock to tick (at a resolution of some fraction
6361 of a second) so as to ensure message-id uniqueness was always waiting for
6362 at least one whole tick, when it could have waited for less. [This is
6363 almost certainly not relevant at current processor speeds, where it is
6364 unlikely to ever wait at all. But we try to future-proof.]
6366 5. The function that sleeps for a time interval that includes fractions of a
6367 second contained a race. It did not block SIGALRM between setting the
6368 timer, and suspending (a couple of lines later). If the interval was short
6369 and the sigsuspend() was delayed until after it had expired, the suspension
6370 never ended. On busy systems this could lead to processes getting stuck for
6373 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6374 process, before it forks any delivery processes. The open lookup caching
6375 mechanism meant that the open file or database connection was passed into
6376 the delivery process. The problem was that delivery processes always tidy
6377 up cached lookup data. This could cause a problem for the next delivery
6378 process started by the queue runner, because the external queue runner
6379 process does not know about the closure. So the next delivery process
6380 still has data in the lookup cache. In the case of a file lookup, there was
6381 no problem because closing a file descriptor in a subprocess doesn't affect
6382 the parent. However, if the lookup was caching a connection to a database,
6383 the connection was closed, and the second delivery process was likely to
6384 see errors such as "PGSQL: query failed: server closed the connection
6385 unexpectedly". The problem has been fixed by closing all cached lookups
6386 in a queue runner before running a delivery process.
6388 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6389 seem to have the "const" qualifier which it has on other OS. I've
6392 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6393 *of the same type* (client or server) with the same public name that an
6394 error should be diagnosed.
6396 9. When Exim looked up a host name for an IP address, but failed to find the
6397 original IP address when looking up the host name (a safety check), it
6398 output the message "<ip address> does not match any IP for NULL", which was
6399 confusing, to say the least. The bug was that the host name should have
6400 appeared instead of "NULL".
6402 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6403 user that is built into the binary, and the -C or -D options is used, root
6404 privilege is dropped before the configuration file is read. In addition,
6405 logging is switched to stderr instead of the normal log files. If the
6406 configuration then re-defines the Exim user, the unprivileged environment
6407 is probably not what is expected, so Exim logs a panic warning message (but
6410 However, if deliver_drop_privilege is set, the unprivileged state may well
6411 be exactly what is intended, so the warning has been cut out in that case,
6412 and Exim is allowed to try to write to its normal log files.
6418 1. smtp_return_error_details was not giving details for temporary sender
6419 or receiver verification errors.
6421 2. Diagnose a configuration error if two authenticators have the same public
6424 3. Exim used not to create the message log file for a message until the first
6425 delivery attempt. This could be confusing when incoming messages were held
6426 for policy or load reasons. The message log file is now created at the time
6427 the message is received, and an initial "Received" line is written to it.
6429 4. The automatically generated man page for command line options had a minor
6430 bug that caused no ill effects; however, a more serious problem was that
6431 the procedure for building the man page automatically didn't always
6432 operate. Consequently, release 4.20 contains an out-of-date version. This
6433 shouldn't happen again.
6435 5. When building Exim with embedded Perl support, the script that builds the
6436 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6437 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6439 6. The freeze_tell option was not being used for messages that were frozen on
6440 arrival, either by an ACL or by local_scan().
6442 7. Added the smtp_incomplete_transaction log selector.
6444 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6445 was accepting AUTH without a new EHLO.
6447 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6448 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6451 10. Logging of TCP/IP connections (when configured) now happens in the main
6452 daemon process instead of the child process, so that the TCP/IP connection
6453 count is more accurate (but it can never be perfect).
6455 11. The use of "drop" in a nested ACL was not being handled correctly in the
6456 outer ACL. Now, if condition failure induced by the nested "drop" causes
6457 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6458 or "require"), the connection is dropped.
6460 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6461 that yield "discard" can now be used with an "accept" or a "discard" verb,
6462 but an error is generated for any others (because I can't see a useful way
6463 to define what should happen).
6465 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6466 are now processed in the same way as lines in the Exim configuration file.
6467 In particular, continuation lines are supported.
6469 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6471 15. Added -ti meaning -t -i.
6473 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6474 domains, and warn by logging if others are found.
6476 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6477 returned from GIFCONF when Exim is trying to find the list of interfaces on
6478 a host. The code in os.c has been modified to copy each ifreq to an aligned
6479 structure in all cases.
6481 Also, in some cases, the returned ifreq's were being copied to a 'struct
6482 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6483 means the last couple of bytes of an IPv6 address could be chopped if the
6484 ifreq contained only a normal sockaddr (14 bytes storage).
6486 18. Named domain lists were not supported in the hosts_treat_as_local option.
6487 An entry such as +xxxx was not recognized, and was treated as a literal
6490 19. Ensure that header lines added by a DATA ACL are included in the reject log
6491 if the ACL subsequently rejects the message.
6493 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6494 MD5 (which is deprecated).
6496 21. When testing a filter file using -bf, Exim was writing a message when it
6497 took the sender from a "From " line in the message, but it was not doing so
6498 when it took $return_path from a Return-Path: header line. It now does.
6500 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6501 with a valid header line field name (a series of printing characters
6502 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6504 23. Changed "disc" in the source to "disk" to conform to the documentation and
6505 the book and for uniformity.
6507 24. Ignore Sendmail's -Ooption=value command line item.
6509 25. When execve() failed while trying to run a command in a pipe transport,
6510 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6511 could be confused with a return value of 69 from the command itself. This
6512 has been changed to 127, the value the shell returns if it is asked to run
6513 a non-existent command. The wording for the related log line suggests a
6514 non-existent command as the problem.
6516 26. If received_header_text expands to an empty string, do not add a Received:
6517 header line to the message. (Well, it adds a token one on the spool, but
6518 marks it "old" so that it doesn't get used or transmitted.)
6520 27. Installed eximstats 1.28 (addition of -nt option).
6522 28. There was no check for failure on the call to getsockname() in the daemon
6523 code. This can fail if there is a shortage of resources on the system, with
6524 ENOMEM, for example. A temporary error is now given on failure.
6526 29. Contrary to the C standard, it seems that in some environments, the
6527 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6528 program. Exim now does this explicitly; it affects the formatting of
6529 timestamps using strftime().
6531 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6532 complaints. I've now initialized all the variables, to avoid this.
6534 32. Header lines added by a system filter were not being "seen" during
6535 transport-time rewrites.
6537 33. The info_callback() function passed to OpenSSL is set up with type void
6538 (*)(SSL *, int, int), as described somewhere. However, when calling the
6539 function (actually a macro) that sets it up, the type void(*)() is
6540 expected. I've put in a cast to prevent warnings from picky compilers.
6542 34. If a DNS black list lookup found a CNAME record, but there were no A
6543 records associated with the domain it pointed at, Exim crashed.
6545 35. If a DNS black list lookup returned more than one A record, Exim ignored
6546 all but the first. It now scans all returned addresses if a particular IP
6547 value is being sought. In this situation, the contents of the
6548 $dnslist_value variable are a list of all the addresses, separated by a
6551 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6552 to accept a host name and all its aliases if the forward lookup for any of
6553 them yielded the IP address of the incoming connection. Now it accepts only
6554 those names whose forward lookup yields the correct IP address. Any other
6555 names are discarded. This closes a loophole whereby a rogue DNS
6556 administrator could create reverse DNS records to break through a
6557 wildcarded host restriction in an ACL.
6559 37. If a user filter or a system filter that ran in a subprocess used any of
6560 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6561 the wrong values were passed to the pipe command ($thisaddress had the
6562 value of $0, $0 had the value of $1, etc). This bug was introduced by
6563 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6565 38. Improved the line breaking for long SMTP error messages from ACLs.
6566 Previously, if there was no break point between 40 and 75 characters, Exim
6567 left the rest of the message alone. Two changes have been made: (a) I've
6568 reduced the minimum length to 35 characters; (b) if it can't find a break
6569 point between 35 and 75 characters, it looks ahead and uses the first one
6570 that it finds. This may give the occasional overlong line, but at least the
6571 remaining text gets split now.
6573 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6574 file descriptors might be low, and that setting 1000 would always raise it.
6575 It turns out that in some environments, the limit is already over 1000 and
6576 that lowering it causes trouble. So now Exim takes care not to decrease it.
6578 40. When delivering a message, the value of $return_path is set to $sender_
6579 address at the start of routing (routers may change the value). By an
6580 oversight, this default was not being set up when an address was tested by
6581 -bt or -bv, which affected the outcome if any router or filter referred to
6584 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6585 log only when "message" or "log_message" are set. However, if one of the
6586 conditions was an address verification, or a call to a nested ACL, the
6587 messages generated by the underlying test were being passed through. This
6588 no longer happens. The underlying message is available in $acl_verify_
6589 message for both "message" and "log_message" expansions, so it can be
6590 passed through if needed.
6592 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6593 new expansion $bh_ to give the encoded byte string without charset
6594 translation. Translation happens only if iconv() is available; HAVE_ICONV
6595 indicates this at build time. HEADERS_CHARSET gives the charset to
6596 translate to; headers_charset can change it in the configuration, and
6597 "headers charset" can change it in an individual filter file.
6599 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6600 that creates RFC 2047 encoded "words" labels them as that charset instead
6601 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6602 expansion operator; (ii) when Exim creates a From: line for a local
6603 message; (iii) when a header line is rewritten to include a "phrase" part.
6605 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6606 buggy, causing it to skip the first lines of messages whose message ID
6607 ended in 'D'. This would not have bitten before Exim release 4.14, because
6608 message IDs were unlikely to end in 'D' before then. The effect was to have
6609 incorrect size information for certain domains.
6611 45. #include "config.h" was missing at the start of the crypt16.c module. This
6612 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6615 46. If there was a timeout during a "random" callout check, Exim treated it as
6616 a failure of the random address, and carried on sending RSET and the real
6617 address. If the delay was just some slowness somewhere, the response to the
6618 original RCPT would be taken as a response to RSET and so on, causing
6619 mayhem of various kinds.
6621 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6622 when I implemented it. It didn't allow for the fact that some option values
6623 may legitimately be negative (e.g. size_addition), and it didn't even do
6624 the right test for positive values.
6626 48. Domain names in DNS records are case-independent. Exim always looks them up
6627 in lower case. Some resolvers return domain names in exactly the case they
6628 appear in the zone file, that is, they may contain uppercase letters. Not
6629 all resolvers do this - some return always lower case. Exim was treating a
6630 change of case by a resolver as a change of domain, similar to a widening
6631 of a domain abbreviation. This triggered its re-routing code and so it was
6632 trying to route what was effectively the same domain again. This normally
6633 caused routing to fail (because the router wouldn't handle the domain
6634 twice). Now Exim checks for this case specially, and just changes the
6635 casing of the domain that it ultimately uses when it transmits the message
6638 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6641 50. If a filter generated a file delivery with a non-absolute name (possible if
6642 no home directory exists for the router), the forbid_file option was not
6645 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6646 the existing equality matching.
6648 52. Exim was using ints instead of ino_t variables in some places where it was
6649 dealing with inode numbers.
6651 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6652 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6653 called TMPDIR, and if it finds it is different, it changes its value.
6655 54. The smtp_printf() function is now made available to local_scan() so
6656 additional output lines can be written before returning. There is also an
6657 smtp_fflush() function to enable the detection of a dropped connection.
6658 The variables smtp_input and smtp_batched_input are exported to
6661 55. Changed the default runtime configuration: the message "Unknown user"
6662 has been removed from the ACL, and instead placed on the localuser router,
6663 using the cannot_route_message feature. This means that any verification
6664 failures that generate their own messages won't get overridden. Similarly,
6665 the "Unrouteable address" message that was in the ACL for unverifiable
6666 relay addresses has also been removed.
6668 56. Added hosts_avoid_esmtp to the smtp transport.
6670 57. The exicyclog script was not checking for the esoteric option
6671 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6672 will work only if exicyclog is run under the appropriate euid.
6674 58. Following a discussion on the list, the rules by which Exim recognises line
6675 endings on incoming messages have been changed. The -dropcr and drop_cr
6676 options are now no-ops, retained only for backwards compatibility. The
6677 following line terminators are recognized: LF CRLF CR. However, special
6678 processing applies to CR:
6680 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6681 nor a local message in the state where . is a terminator.
6683 (ii) If a bare CR is encountered in a header line, an extra space is added
6684 after the line terminator so as not to end the header. The reasoning
6685 behind this is that bare CRs in header lines are most likely either
6686 to be mistakes, or people trying to play silly games.
6688 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6689 was being incorrectly given as 18 bytes larger than it should have been.
6690 This is a VOB (very old bug).
6692 60. This may never have affected anything current, but just in case it has:
6693 When the local host is found other than at the start of a list of hosts,
6694 the local host, those with the same MX, and any that follow, are discarded.
6695 When the list in question was part of a longer list of hosts, the following
6696 hosts (not currently being processed) were also being discarded. This no
6697 longer happens. I'm not sure if this situation could ever has previously
6700 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6703 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6704 header. This is something that is recommended in a new Internet Draft, and
6705 is something that is documented as being done by Sendmail. There are two
6706 possible values. For messages generated by the autoreply transport, Exim
6709 Auto-Submitted: auto-replied
6711 whereas for all other generated messages (e.g. bounces) it adds
6713 Auto-Submitted: auto-generated
6715 63. The "personal" condition in filters now includes a test for the
6716 Auto-Submitted: header. If it contains the string "auto-" the message it
6717 not considered personal.
6719 64. Added rcpt_include_affixes as a generic transport option.
6721 65. Added queue_only_override (default true).
6723 66. Added the syslog_duplication option.
6725 67. If what should have been the first header line of a message consisted of
6726 a space followed by a colon, Exim was mis-interpreting it as a header line.
6727 It isn't of course - it is syntactically invalid and should therefore be
6728 treated as the start of the message body. The misbehaviour could have
6729 caused a number of strange effects, including loss of data in subsequent
6730 header lines, and spool format errors.
6732 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6733 client host had authenticated. This control can now be exercised by an ACL
6734 for more flexibility.
6736 69. By default, callouts do not happen when testing with -bh. There is now a
6737 variant, -bhc, which does actually run the callout code, including
6738 consulting and updating the callout cache.
6740 70. Added support for saslauthd authentication, courtesy of Alexander
6743 71. If statvfs() failed on the spool or log directories while checking their
6744 size for availability, Exim confusingly gave the error "space shortage".
6745 Furthermore, in debugging mode it crashed with a floating point exception.
6746 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6747 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6748 serious problem, Exim now writes to the main and panic logs when this
6749 happens, with details of the failure. It then refuses to accept the
6750 incoming message, giving the message "spool directory problem" or "log
6751 directory problem" with a 421 code for SMTP messages.
6753 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6754 0, 1, and 2 exist, because some OS complain for execs without them (see
6755 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6756 descriptors. However, the code omitted to check that the open succeeded,
6757 causing mysterious errors if for some reason the permissions on /dev/null
6758 got screwed. Now Exim writes a message to the main and panic logs, and
6759 bombs out if it can't open /dev/null.
6761 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6762 interact so that it is all more flexible. It is supposed to remain
6763 backwards compatible. Also added extra_local_interfaces.
6765 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6766 to bomb out with an assertion failure - to the client this appears as a
6767 connection drop. This problem occurs in the part of the code that was taken
6768 from the Samba project. Fortunately, the assertion is in a very simple
6769 function, so I have fixed this by reproducing the function inline in the
6770 one place where it is called, and arranging for authentication to fail
6771 instead of killing the process with assert().
6773 75. The SPA client code was not working when the server requested OEM rather
6774 than Unicode encoding.
6776 76. Added code to make require_files with a specific uid setting more usable in
6777 the case where statting the file as root fails - usually a non-root-mounted
6778 NFS file system. When this happens and the failure is EACCES, Exim now
6779 forks a subprocess and does the per-uid checking as the relevant uid.
6781 77. Added process_log_path.
6783 78. If log_file_path was not explicitly set, a setting of check_log_space or
6784 check_log_inodes was ignored.
6786 79. If a space check for the spool or log partitions fails, the incident is now
6787 logged. Of course, in the latter case the data may get lost...
6789 80. Added the %p formatting code to string_format() so that it can be used to
6790 print addresses in debug_print(). Adjusted all the address printing in the
6791 debugging in store.c to use %p rather than %d.
6793 81. There was a concern that a line of code in smtp_in.c could overflow a
6794 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6795 initially expressed, the concern was not well-founded, because trailing
6796 spaces are removed early. However, if the trailing spaces were followed by
6797 a NULL, they did not get removed, so the overflow was possible. Two fixes
6800 (a) I re-wrote the offending code in a cleaner fashion.
6801 (b) If an incoming SMTP command contains a NULL character, it is rejected
6804 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6805 runs initgroups(), so that if the Exim user is in any additional groups,
6806 they will be used during message reception.
6812 The change log for 4.20 and earlier releases has been archived.