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 Bug 1922: Support IDNA2008. This has slightly different conversion rules
12 than -2003 did; needs libidn2 in addition to libidn.
14 JH/02 The path option on a pipe transport is now expanded before use.
16 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
17 Patch provided by "Björn", documentation fix added too.
19 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
20 missing a wire-to-host endian conversion.
22 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
23 close after a BDAT command line could be taken as a following command,
24 giving a synch failure. Fix by only checking for synch immediately
25 before acknowledging the chunk.
27 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
28 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
29 macro. Patches provided by Josh Soref.
31 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
32 Previously we did not; the RFC seems ambiguous and VRFY is not listed
33 by IANA as a service extension. However, John Klensin suggests that we
36 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
37 the dkim code may be unix-mode line endings rather than smtp wire-format
38 CRLF, so prepend a CR to any bare LF.
40 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
41 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
43 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
44 the first were themselves being wrongly included in the feed into dkim
45 processing; with most chunk sizes in use this resulted in an incorrect
46 body hash calculated value.
48 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
49 DKIM signature block, for verification. Although advised against by
50 standards it is specifically not ruled illegal.
52 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
54 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
55 missing a body hash (the bh= tag).
57 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
58 It seems that HAProxy sends the Proxy Protocol information in clear and
59 only then does a TLS startup, so do the same.
61 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
62 TCP connections (such as for Spamd) unless the daemon successfully set
63 Fast Open mode on its listening sockets. This fixes breakage seen on
64 too-old kernels or those not configured for Fast Open, at the cost of
65 requiring both directions being enabled for TFO, and TFO never being used
66 by non-daemon-related Exim processes.
68 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
69 endings, at least on the first header line. Try to canonify any that get
70 past that check, despite the cost.
72 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
73 now limited to an arbitrary five deep, while parsing addresses with the
74 strip_excess_angle_brackets option enabled.
76 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
77 instead leave the unprompted TLS handshake in socket buffer for the
78 TLS library to consume.
80 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
82 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
84 JH/16 Drop variables when they go out of scope. Memory management drops a whole
85 region in one operation, for speed, and this leaves assigned pointers
86 dangling. Add checks run only under the testsuite which checks all
87 variables at a store-reset and panics on a dangling pointer; add code
88 explicitly nulling out all the variables discovered. Fixes one known
89 bug: a transport crash, where a dangling pointer for $sending_ip_address
90 originally assigned in a verify callout, is re-used.
92 PP/06 Drop '.' from @INC in various Perl scripts.
94 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
96 PP/08 Reduce a number of compilation warnings under clang; building with
97 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
98 should be warning-free.
100 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
102 HS/01 Fix portability problems introduced by PP/08 for platforms where
103 realloc(NULL) is not equivalent to malloc() [SunOS et al].
105 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
106 chunk. This allows us to accept broken chunked messages. We need a more
107 general solution here.
109 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
110 already-broken messages in the queue.
116 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
117 supports it and a size is available (ie. the sending peer gave us one).
119 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
120 years of being deprecated). The replacements are the ACLs
121 acl_smtp_mime and acl_not_smtp_mime.
123 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
124 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
125 or even an in-clear connection were permitted. Now, if the host lookup
126 was dnssec and dane was requested then the host is only used if the
127 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
128 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
129 if one fails this test.
130 This means that a poorly-configured remote DNS will make it incommunicado;
131 but it protects against a DNS-interception attack on it.
133 JH/04 Bug 1810: make continued-use of an open smtp transport connection
134 non-noisy when a race steals the message being considered.
136 JH/05 If main configuration option tls_certificate is unset, generate a
137 self-signed certificate for inbound TLS connections.
139 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
140 in rewrites and routers.
142 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
143 and logged a warning sing 4.83; now they are a configuration file error.
145 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
146 (lacking @domain). Apply the same qualification processing as RCPT.
148 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
150 JH/10 Support ${sha256:} applied to a string (as well as the previous
153 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
154 a cutthrough deliver is pending, as we always want to make a connection.
155 This also avoids re-routing the message when later placing the cutthrough
156 connection after a verify cache hit.
157 Do not update it with the verify result either.
159 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
160 when routing results in more than one destination address.
162 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
163 signing (which inhibits the cutthrough capability). Previously only
164 the presence of an option was tested; now an expansion evaluating as
165 empty is permissible (obviously it should depend only on data available
166 when the cutthrough connection is made).
168 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
169 the relevant preceding SMTP command did not note the pipelining mode.
171 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
172 Previously they were not counted.
174 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
175 as one having no matching records. Previously we deferred the message
176 that needed the lookup.
178 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
179 distinguished as "(=".
181 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
182 for missing MX records. Previously it only worked for missing A records.
184 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
186 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
187 after the data-go-ahead and data-ack. Patch from Jason Betts.
189 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
190 even for a "none" policy. Patch from Tony Meyer.
192 JH/22 Fix continued use of a connection for further deliveries. If a port was
193 specified by a router, it must also match for the delivery to be
196 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
197 When one of the recipients of a message was unsuitable for the connection
198 (has no matching addresses), we lost track of needing to mark it
199 deferred. As a result mail would be lost.
201 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
203 JH/25 Decoding ACL controls is now done using a binary search; the source code
204 takes up less space and should be simpler to maintain. Merge the ACL
205 condition decode tables also, with similar effect.
207 JH/26 Fix problem with one_time used on a redirect router which returned the
208 parent address unchanged. A retry would see the parent address marked as
209 delivered, so not attempt the (identical) child. As a result mail would
212 JH/27 Fix a possible security hole, wherein a process operating with the Exim
213 UID can gain a root shell. Credit to http://www.halfdog.net/ for
214 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
217 JH/28 Enable {spool,log} filesystem space and inode checks as default.
218 Main config options check_{log,spool}_{inodes,space} are now
219 100 inodes, 10MB unless set otherwise in the configuration.
221 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
222 Previously it only applied to the main-section connection policy
225 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
227 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
228 by me. Added RFC7919 DH primes as an alternative.
230 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
231 are not in the system include path.
233 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
234 GnuTLS, when a session startup failed (eg because the client disconnected)
235 Exim did stdio operations after fclose. This was exposed by a recent
236 change which nulled out the file handle after the fclose.
238 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
239 signed directly by the cert-signing cert, rather than an intermediate
240 OCSP-signing cert. This is the model used by LetsEncrypt.
242 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
244 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
245 an incoming connection.
247 HS/02 Bug 1802: Do not half-close the connection after sending a request
250 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
251 fallback to "prime256v1".
253 JH/34 SECURITY: Use proper copy of DATA command in error message.
254 Could leak key material. Remotely exploitable. CVE-2016-9963.
260 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
261 and 3.4.4 - once the server is enabled to respond to an OCSP request
262 it does even when not requested, resulting in a stapling non-aware
263 client dropping the TLS connection.
265 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
266 support variable-length bit vectors. No functional change.
268 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
269 The I= interface field on outgoing lines is now after the H= remote
270 host field, same as incoming lines. There is a separate
271 outgoing_interface log selector which allows you to disable the
274 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
275 If not running log_selector +smtp_connection the mainlog would be held
276 open indefinitely after a "too many connections" event, including to a
277 deleted file after a log rotate. Leave the per net connection logging
278 leaving it open for efficiency as that will be quickly detected by the
279 check on the next write.
281 HS/01 Bug 1671: Fix post transport crash.
282 Processing the wait-<transport> messages could crash the delivery
283 process if the message IDs didn't exist for some reason. When
284 using 'split_spool_directory=yes' the construction of the spool
285 file name failed already, exposing the same netto behaviour.
287 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
288 mime_regex ACL conditions.
290 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
291 to DSN fail messages (bounces): remote IP, remote greeting, remote response
292 to HELO, local diagnostic string.
294 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
295 log line to debug. Even when configured with a tls authenticator many
296 client connections are expected to not authenticate in this way, so
297 an authenticate fail is not an error.
299 HS/02 Add the Exim version string to the process info. This way exiwhat
300 gives some more detail about the running daemon.
302 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
303 matter for fast-change records such as DNSBLs.
305 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
306 retry record, even if constant. There may be multiple transports with
307 different interface settings and the retry behaviour needs to be kept
310 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
312 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
314 JH/10 Bug 840: fix log_defer_output option of pipe transport
316 JH/11 Bug 830: use same host for all RCPTS of a message, even under
317 hosts_randomize. This matters a lot when combined with mua_wrapper.
319 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
320 ${quote_pgsql:<string>} operator.
322 JH/13 Bug 1708: avoid misaligned access in cached lookup.
324 JH/14 Change header file name for freeradius-client. Relevant if compiling
325 with Radius support; from the Gentoo tree and checked under Fedora.
327 JH/15 Bug 1712: Introduce $prdr_requested flag variable
329 JH/16 Bug 1714: Permit an empty string as expansion result for transport
330 option transport_filter, meaning no filtering.
332 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
334 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
335 defaults to "*" (all hosts). The variable is now available when not built
336 with TLS, default unset, mainly to enable keeping the testsuite sane.
337 If a server certificate is not supplied (via tls_certificate) an error is
338 logged, and clients will find TLS connections fail on startup. Presumably
339 they will retry in-clear.
340 Packagers of Exim are strongly encouraged to create a server certificate
341 at installation time.
343 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
344 with the $config_file variable.
346 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
347 in transport context, after the attempt, and per-recipient. The latter type
348 is per host attempted. The event data is the error message, and the errno
349 information encodes the lookup type (A vs. MX) used for the (first) host,
350 and the trailing two digits of the smtp 4xx response.
352 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
353 to write to mainlog (or rejectlog, paniclog) in the window between file
354 creation and permissions/ownership being changed. Particularly affects
355 installations where exicyclog is run as root, rather than exim user;
356 result is that the running daemon panics and dies.
358 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
360 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
361 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
362 "pri" and "weight". Note that the previous implicit priority given by the
363 list order is no longer honoured.
365 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
368 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
369 by defining SUPPORT_SOCKS.
371 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
372 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
373 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
374 variables are renamed to proxy_{local,external}_{address,port}.
376 JH/27 Move Internationalisation support from Experimental to mainline, enabled
377 for a build by defining SUPPORT_I18N
379 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
380 of the query string, and make ${quote_redis:} do that quoting.
382 JH/29 Move Events support from Experimental to mainline, enabled by default
383 and removable for a build by defining DISABLE_EVENT.
385 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
387 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
388 cached by the daemon.
390 JH/32 Move Redis support from Experimental to mainline, enabled for a build
391 by defining LOOKUP_REDIS. The libhiredis library is required.
393 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
394 keys are given for lookup.
396 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
397 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
398 only supported when built with TLS support. The PolarSSL SHA routines
399 are still used when the TLS library is too old for convenient support.
401 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
402 openssl_options), for security. OpenSSL forces this from version 1.1.0
403 server-side so match that on older versions.
405 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
406 allocation for $value could be released as the expansion processing
407 concluded, but leaving the global pointer active for it.
409 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
410 and to use the domains and local_parts ACL conditions.
412 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
413 incorrectly not doubled on cutthrough transmission, hence seen as a
414 body-termination at the receiving system - resulting in truncated mails.
415 Commonly the sender saw a TCP-level error, and retransmitted the message
416 via the normal store-and-forward channel. This could result in duplicates
417 received - but deduplicating mailstores were liable to retain only the
418 initial truncated version.
420 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
422 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
424 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
425 we're in there, support oversigning also; bug 1309.
427 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
429 HS/04 Add support for keep_environment and add_environment options.
431 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
432 either intentional arithmetic overflow during PRNG, or testing config-
435 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
436 delivery resulted in actual delivery. Cancel cutthrough before DATA
439 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
440 rejects a recipient: pass the reject to the originator.
442 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
443 Many were false-positives and ignorable, but it's worth fixing the
446 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
447 for the new environment-manipulation done at startup. Move the routines
448 from being local to tls.c to being global via the os.c file.
450 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
451 an extract embedded as result-arg for a map, the first arg for extract
452 is unavailable so we cannot tell if this is a numbered or keyed
453 extraction. Accept either.
459 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
462 JH/02 The smtp transport option "multi_domain" is now expanded.
464 JH/03 The smtp transport now requests PRDR by default, if the server offers
467 JH/04 Certificate name checking on server certificates, when exim is a client,
468 is now done by default. The transport option tls_verify_cert_hostnames
469 can be used to disable this per-host. The build option
470 EXPERIMENTAL_CERTNAMES is withdrawn.
472 JH/05 The value of the tls_verify_certificates smtp transport and main options
473 default to the word "system" to access the system default CA bundle.
474 For GnuTLS, only version 3.0.20 or later.
476 JH/06 Verification of the server certificate for a TLS connection is now tried
477 (but not required) by default. The verification status is now logged by
478 default, for both outbound TLS and client-certificate supplying inbound
481 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
484 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
485 Status Notification (bounce) messages are now MIME format per RFC 3464.
486 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
487 under the control of the dsn_advertise_hosts option, and routers may
488 have a dsn_lasthop option.
490 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
491 default, modifiable by a malware= option. The list separator for
492 the options can now be changed in the usual way. Bug 68.
494 JH/10 The smtp_receive_timeout main option is now expanded before use.
496 JH/11 The incoming_interface log option now also enables logging of the
497 local interface on delivery outgoing connections.
499 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
500 if the interface and destination host and port all match.
502 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
505 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
506 Patch from Andrew Lewis.
508 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
509 now supports optional time-restrictions, weighting, and priority
510 modifiers per server. Patch originally by <rommer@active.by>.
512 JH/16 The spamd_address main option now supports a mixed list of local
513 and remote servers. Remote servers can be IPv6 addresses, and
514 specify a port-range.
516 JH/17 Bug 68: The spamd_address main option now supports an optional
517 timeout value per server.
519 JH/18 Bug 1581: Router and transport options headers_add/remove can
520 now have the list separator specified.
522 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
525 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
528 JH/21 Support for the A6 type of dns record is withdrawn.
530 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
531 rather than the verbs used.
533 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
534 from 255 to 1024 chars.
536 JH/24 Verification callouts now attempt to use TLS by default.
538 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
539 are generic router options now. The defaults didn't change.
541 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
542 Original patch from Alexander Shikoff, worked over by JH.
544 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
545 files if ZCAT_COMMAND is not executable.
547 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
549 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
551 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
552 Normally benign, it bites when the pair was led to by a CNAME;
553 modern usage is to not canonicalize the domain to a CNAME target
554 (and we were inconsistent anyway for A-only vs AAAA+A).
556 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
558 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
559 when evaluating $sender_host_dnssec.
561 JH/31 Check the HELO verification lookup for DNSSEC, adding new
562 $sender_helo_dnssec variable.
564 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
566 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
568 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
570 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
571 documented as working, but never had. Support all but $spam_report.
573 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
574 added for tls authenticator.
576 HS/03 Add perl_taintmode main config option
582 TL/01 When running the test suite, the README says that variables such as
583 no_msglog_check are global and can be placed anywhere in a specific
584 test's script, however it was observed that placement needed to be near
585 the beginning for it to behave that way. Changed the runtest perl
586 script to read through the entire script once to detect and set these
587 variables, reset to the beginning of the script, and then run through
588 the script parsing/test process like normal.
590 TL/02 The BSD's have an arc4random API. One of the functions to induce
591 adding randomness was arc4random_stir(), but it has been removed in
592 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
593 function when detected.
595 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
596 cause callback expansion.
598 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
599 syntax errors in an expansion can be treated as a string instead of
600 logging or causing an error, due to the internal use of bool_lax
601 instead of bool when processing it.
603 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
604 server certificates when making smtp deliveries.
606 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
608 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
610 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
612 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
613 Merged patch from Sebastian Wiedenroth.
615 JH/05 Fix results-pipe from transport process. Several recipients, combined
616 with certificate use, exposed issues where response data items split
617 over buffer boundaries were not parsed properly. This eventually
618 resulted in duplicates being sent. This issue only became common enough
619 to notice due to the introduction of connection certificate information,
620 the item size being so much larger. Found and fixed by Wolfgang Breyha.
622 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
623 size buffer was used, resulting in syntax errors when an expansion
626 JH/07 Add support for directories of certificates when compiled with a GnuTLS
627 version 3.3.6 or later.
629 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
630 is EXPERIMENTAL_EVENT, the main-configuration and transport options
631 both become "event_action", the variables become $event_name, $event_data
632 and $event_defer_errno. There is a new variable $verify_mode, usable in
633 routers, transports and related events. The tls:cert event is now also
634 raised for inbound connections, if the main configuration event_action
637 TL/06 In test suite, disable OCSP for old versions of openssl which contained
638 early OCSP support, but no stapling (appears to be less than 1.0.0).
640 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
641 server certificate names available under the smtp transport option
642 "tls_verify_cert_hostname" now do not permit multi-component wildcard
645 JH/10 Time-related extraction expansions from certificates now use the main
646 option "timezone" setting for output formatting, and are consistent
647 between OpenSSL and GnuTLS compilations. Bug 1541.
649 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
650 encoded parameter in the incoming message. Bug 1558.
652 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
653 include certificate info, eximon was claiming there were spoolfile
656 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
658 JH/14 Log delivery-related information more consistently, using the sequence
659 "H=<name> [<ip>]" wherever possible.
661 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
662 are problematic for Debian distribution, omit them from the release
665 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
667 JH/16 Fix string representation of time values on 64bit time_t architectures.
670 JH/17 Fix a null-indirection in certextract expansions when a nondefault
671 output list separator was used.
676 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
677 checkers that were complaining about end of non-void function with no
680 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
681 This was a regression introduced in 4.83 by another bugfix.
683 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
685 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
686 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
692 TF/01 Correctly close the server side of TLS when forking for delivery.
694 When a message was received over SMTP with TLS, Exim failed to clear up
695 the incoming connection properly after forking off the child process to
696 deliver the message. In some situations the subsequent outgoing
697 delivery connection happened to have the same fd number as the incoming
698 connection previously had. Exim would try to use TLS and fail, logging
699 a "Bad file descriptor" error.
701 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
702 utilities have not been installed.
704 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
705 temporary space as the ACL may create new global variables.
707 TL/01 LDAP support uses per connection or global context settings, depending
708 upon the detected version of the libraries at build time.
710 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
711 to extract and use the src ip:port in logging and expansions as if it
712 were a direct connection from the outside internet. PPv2 support was
713 updated based on HAProxy spec change in May 2014.
715 JH/02 Add ${listextract {number}{list}{success}{fail}}.
717 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
718 Properly escape header and check for NULL return.
720 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
723 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
725 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
726 characters in header names, implemented as a verify condition.
727 Contributed by Michael Fischer v. Mollard.
729 TL/05 Rename SPF condition results err_perm and err_temp to standardized
730 results permerror and temperror. Previous values are deprecated but
731 still accepted. In a future release, err_perm and err_temp will be
732 completely removed, which will be a backward incompatibility if the
733 ACL tests for either of these two old results. Patch contributed by
734 user bes-internal on the mailing list.
736 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
738 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
739 selectors, in both main and reject logs.
741 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
744 JH/07 Add malware type "sock" for talking to simple daemon.
746 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
748 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
749 routers/transports under cutthrough routing.
751 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
752 numbers. Touch up "bool" conditional to keep the same definition.
754 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
756 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
758 JH/12 Expand items in router/transport headers_add or headers_remove lists
759 individually rather than the list as a whole. Bug 1452.
761 Required for reasonable handling of multiple headers_ options when
762 they may be empty; requires that headers_remove items with embedded
763 colons must have them doubled (or the list-separator changed).
765 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
766 view the policy declared in the DMARC record. Currently, $dmarc_status
767 is a combined value of both the record presence and the result of the
770 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
772 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
773 dnslookup router and the smtp transport (applying to the forward
776 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
777 of ldap servers used for a specific lookup. Patch provided by Heiko
780 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
781 New variable $lookup_dnssec_authenticated for observability.
783 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
784 Patch submitted by Lars Timman.
786 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
788 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
789 Requires trusted mode and valid format message id, aborts otherwise.
790 Patch contributed by Heiko Schlichting.
792 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
793 certextract with support for various fields. Bug 1358.
795 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
796 is requested by default, modifiable by smtp transport option
799 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
800 operate on certificate variables to give certificate fingerprints
801 Also new ${sha256:cert_variable}.
803 JH/23 The PRDR feature is moved from being Experimental into the mainline.
805 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
806 Christian Aistleitner.
808 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
810 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
811 file. Patch from Wolfgang Breyha.
813 JH/25 Expand the coverage of the delivery $host and $host_address to
814 client authenticators run in verify callout. Bug 1476.
816 JH/26 Port service names are now accepted for tls_on_connect_ports, to
817 align with daemon_smtp_ports. Bug 72.
819 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
820 support and error reporting did not work properly.
822 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
823 and is readable. Patch from Andrew Colin Kissa.
825 TL/14 Enhance documentation of ${run expansion and how it parses the
826 commandline after expansion, particularly in the case when an
827 unquoted variable expansion results in an empty value.
829 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
831 PP/02 Fix internal collision of T_APL on systems which support RFC3123
832 by renaming away from it. Addresses GH issue 15, reported by
835 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
837 TL/15 SECURITY: prevent double expansion in math comparison functions
838 (can expand unsanitized data). Not remotely exploitable.
845 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
847 PP/02 Make -n do something, by making it not do something.
848 When combined with -bP, the name of an option is not output.
850 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
853 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
854 $sender_host_name and config options to manage this, and basic check
857 PP/05 DSCP support for outbound connections and control modifier for inbound.
859 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
860 (Only plugin which currently uses this is kerberos4, which nobody should
861 be using, but we should make it available and other future plugins might
862 conceivably use it, even though it would break NAT; stuff *should* be
863 using channel bindings instead).
865 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
866 name; added for Sendmail compatibility; requires admin caller.
867 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
868 just ignore it); requires trusted caller.
869 Also parse but ignore: -Ac -Am -X<logfile>
872 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
874 TL/02 Add +smtp_confirmation as a default logging option.
876 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
877 Patch by Magnus Holmgren from 2007-02-20.
879 TL/04 Bugzilla 1281 - Spec typo.
880 Bugzilla 1283 - Spec typo.
881 Bugzilla 1290 - Spec grammar fixes.
883 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
885 TL/06 Add Experimental DMARC support using libopendmarc libraries.
887 TL/07 Fix an out of order global option causing a segfault. Reported to dev
888 mailing list by by Dmitry Isaikin.
890 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
892 JH/02 Support "G" suffix to numbers in ${if comparisons.
894 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
896 NM/01 Bugzilla 1197 - Spec typo
897 Bugzilla 1196 - Spec examples corrections
899 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
901 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
902 gnutls_enable_pkcs11, but renamed to more accurately indicate its
905 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
906 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
908 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
909 "acl {{name}{arg}...}", and optional args on acl condition
912 JH/05 Permit multiple router/transport headers_add/remove lines.
914 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
916 JH/07 Avoid using a waiting database for a single-message-only transport.
917 Performance patch from Paul Fisher. Bugzilla 1262.
919 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
922 JH/09 Add $headers_added variable, with content from use of ACL modifier
923 add_header (but not yet added to the message). Bugzilla 199.
925 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
926 Pulled from Bugzilla 817 by Wolfgang Breyha.
928 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
930 (nb: this is the same fix as in Exim 4.80.1)
932 JH/11 Add A= logging on delivery lines, and a client_set_id option on
935 JH/12 Add optional authenticated_sender logging to A= and a log_selector
938 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
940 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
941 advertise SMTP AUTH mechanism to us, instead of a generic
942 protocol violation error. Also, make Exim more robust to bad
943 data from the Dovecot auth socket.
945 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
947 When a queue runner is handling a message, Exim first routes the
948 recipient addresses, during which it prunes them based on the retry
949 hints database. After that it attempts to deliver the message to
950 any remaining recipients. It then updates the hints database using
953 So if a recipient address works intermittently, it can get repeatedly
954 deferred at routing time. The retry hints record remains fresh so the
955 address never reaches the final cutoff time.
957 This is a fairly common occurrence when a user is bumping up against
958 their storage quota. Exim had some logic in its local delivery code
959 to deal with this. However it did not apply to per-recipient defers
960 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
962 This change adds a proper retry rule check during routing so that the
963 final cutoff time is checked against the message's age. We only do
964 this check if there is an address retry record and there is not a
965 domain retry record; this implies that previous attempts to handle
966 the address had the retry_use_local_parts option turned on. We use
967 this as an approximation for the destination being like a local
968 delivery, as in LMTP.
970 I suspect this new check makes the old local delivery cutoff check
971 redundant, but I have not verified this so I left the code in place.
973 TF/02 Correct gecos expansion when From: is a prefix of the username.
975 Test 0254 submits a message to Exim with the header
979 When I ran the test suite under the user fanf2, Exim expanded
980 the header to contain my full name, whereas it should have added
981 a Resent-Sender: header. It erroneously treats any prefix of the
982 username as equal to the username.
984 This change corrects that bug.
986 GF/01 DCC debug and logging tidyup
987 Error conditions log to paniclog rather than rejectlog.
988 Debug lines prefixed by "DCC: " to remove any ambiguity.
990 TF/03 Avoid unnecessary rebuilds of lookup-related code.
992 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
993 Bug spotted by Jeremy Harris; was flawed since initial commit.
994 Would have resulted in OCSP responses post-SNI triggering an Exim
995 NULL dereference and crash.
997 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
999 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1000 Bug detection, analysis and fix by Samuel Thibault.
1001 Bugzilla 1331, Debian bug #698092.
1003 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1005 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1006 Server implementation by Todd Lyons, client by JH.
1007 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1008 config variable "prdr_enable" controls whether the server
1009 advertises the facility. If the client requests PRDR a new
1010 acl_data_smtp_prdr ACL is called once for each recipient, after
1011 the body content is received and before the acl_smtp_data ACL.
1012 The client is controlled by both of: a hosts_try_prdr option
1013 on the smtp transport, and the server advertisement.
1014 Default client logging of deliveries and rejections involving
1015 PRDR are flagged with the string "PRDR".
1017 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1018 fclose(). Diagnosis by Todd Lyons.
1020 PP/17 Update configure.default to handle IPv6 localhost better.
1021 Patch by Alain Williams (plus minor tweaks).
1024 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1025 This is now consistent with GnuTLS, and is now documented: the
1026 previous undocumented portable approach to treating the option as
1027 unset was to force an expansion failure. That still works, and
1028 an empty string is now equivalent.
1030 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1031 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1032 not performing validation itself.
1034 PP/20 Added force_command boolean option to pipe transport.
1035 Patch from Nick Koston, of cPanel Inc.
1037 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1040 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1042 PP/21 Fix eximon continuous updating with timestamped log-files.
1043 Broken in a format-string cleanup in 4.80, missed when I repaired the
1044 other false fix of the same issue.
1045 Report and fix from Heiko Schlichting.
1048 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1049 Report from Prashanth Katuri.
1051 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1052 It's SecureTransport, so affects any MacOS clients which use the
1053 system-integrated TLS libraries, including email clients.
1055 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1056 using a MIME ACL for non-SMTP local injection.
1057 Report and assistance in diagnosis by Warren Baker.
1059 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1061 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1063 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1064 last id that failed so it may be referenced in subsequent ACL's.
1066 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1069 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1070 ldap library initialization, allowing self-signed CA's to be
1071 used. Also properly sets require_cert option later in code by
1072 using NULL (global ldap config) instead of ldap handle (per
1073 session). Bug diagnosis and testing by alxgomz.
1075 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1076 the src/util/ subdirectory.
1078 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1079 renamed to Transport Post Delivery Action by Jeremy Harris, as
1082 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1083 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1084 redis_servers = needs to be configured which will be used by the redis
1085 lookup. Patch from Warren Baker, of The Packet Hub.
1087 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1089 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1090 hostname or reverse DNS when processing a host list. Used suggestions
1091 from multiple comments on this bug.
1093 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1095 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1096 Missed a few lines, added it to make the runtest require no keyboard
1099 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1100 contains upper case chars. Make router use caseful_local_part.
1102 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1103 support when GnuTLS has been built with p11-kit.
1109 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1111 This, or similar/improved, will also be change PP/11 of 4.82.
1117 PP/01 Handle short writes when writing local log-files.
1118 In practice, only affects FreeBSD (8 onwards).
1119 Bugzilla 1053, with thanks to Dmitry Isaikin.
1121 NM/01 Bugzilla 949 - Documentation tweak
1123 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1126 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1128 PP/02 Implemented gsasl authenticator.
1130 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1132 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1133 `pkg-config foo` for cflags/libs.
1135 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1136 with rest of GSASL and with heimdal_gssapi.
1138 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1139 `pkg-config foo` for cflags/libs for the TLS implementation.
1141 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1142 properties get this fed in as external SSF. A number of robustness
1143 and debugging improvements to the cyrus_sasl authenticator.
1145 PP/08 cyrus_sasl server now expands the server_realm option.
1147 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1148 Patch by Jeremy Harris.
1150 PP/10 Added dbmjz lookup type.
1152 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1154 PP/12 MAIL args handles TAB as well as SP, for better interop with
1155 non-compliant senders.
1156 Analysis and variant patch by Todd Lyons.
1158 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1159 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1160 Patch from Dirk Mueller <dmueller@suse.com>
1162 PP/13 tls_peerdn now print-escaped for spool files.
1163 Observed some $tls_peerdn in wild which contained \n, which resulted
1164 in spool file corruption.
1166 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1167 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1168 or write after TLS renegotiation, which otherwise led to messages
1171 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1172 as a tracking header (ie: a signed header comes before the signature).
1173 Patch from Wolfgang Breyha.
1175 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1176 comma-sep list; embedded commas doubled.
1178 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1180 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1182 Report and patch from Dmitry Banschikov.
1184 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1185 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1186 failures. We appear to now support TLS1.1+ with Exim.
1188 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1189 lets Exim select keys and certificates based upon TLS SNI from client.
1190 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1191 before an outbound SMTP session. New log_selector, +tls_sni.
1193 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1194 NULL dereference. Report and patch from Alun Jones.
1196 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1197 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1198 Not seeing resolver debug output on NetBSD, but suspect this is a
1199 resolver implementation change.
1201 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1202 Left warnings. Added "eximon gdb" invocation mode.
1204 PP/21 Defaulting "accept_8bitmime" to true, not false.
1206 PP/22 Added -bw for inetd wait mode support.
1208 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1209 locate the relevant includes and libraries. Made this the default.
1211 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1212 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1214 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1215 This may cause build issues on older platforms.
1217 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1218 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1219 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1220 Added SNI support via GnuTLS too.
1221 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1223 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1225 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1226 Applied second patch from Janne, implementing suggestion to default
1227 multiple-strings-in-record handling to match SPF spec.
1229 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1231 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1232 read-only, out of scope).
1233 Patch from Wolfgang Breyha, report from Stuart Northfield.
1235 PP/29 Fix three issues highlighted by clang analyser static analysis.
1236 Only crash-plausible issue would require the Cambridge-specific
1237 iplookup router and a misconfiguration.
1238 Report from Marcin Mirosław.
1240 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1242 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1243 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1244 As part of this, removing so much warning spew let me fix some minor
1245 real issues in debug logging.
1247 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1248 assignment on my part. Fixed.
1250 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1251 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1252 Janne Snabb (who went above and beyond: thank you).
1254 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1255 string otherwise requires a connection and a bunch more work and it's
1256 relatively easy to get wrong. Should also expose TLS library linkage
1259 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1260 64-bit ${eval} (JH/03).
1262 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1263 GNU libc to support some of the 64-bit stuff, should not lead to
1264 conflicts. Defined before os.h is pulled in, so if a given platform
1265 needs to override this, it can.
1267 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1268 protection layer was required, which is not implemented.
1269 Bugzilla 1254, patch from Wolfgang Breyha.
1271 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1272 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1273 tls_dhparam take prime identifiers. Also unbreak combination of
1274 OpenSSL+DH_params+TLSSNI.
1276 PP/39 Disable SSLv2 by default in OpenSSL support.
1282 PP/01 Solaris build fix for Oracle's LDAP libraries.
1283 Bugzilla 1109, patch from Stephen Usher.
1285 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1287 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1290 TF/02 Fix a couple more cases where we did not log the error message
1291 when unlink() failed. See also change 4.74-TF/03.
1293 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1294 lock up or crash if it happened to be inside a call to libc when it
1295 got a SIGUSR1 from exiwhat.
1297 The SIGUSR1 handler appends the current process status to the process
1298 log which is later printed by exiwhat. It used to use the general
1299 purpose logging code to do this, but several functions it calls are
1300 not safe for signals.
1302 The new output code in the SIGUSR1 handler is specific to the process
1303 log, and simple enough that it's easy to inspect for signal safety.
1304 Removing some special cases also simplifies the general logging code.
1305 Removing the spurious timestamps from the process log simplifies
1308 TF/04 Improved ratelimit ACL condition.
1310 The /noupdate option has been deprecated in favour of /readonly which
1311 has clearer semantics. The /leaky, /strict, and /readonly update modes
1312 are mutually exclusive. The update mode is no longer included in the
1313 database key; it just determines when the database is updated. (This
1314 means that when you upgrade Exim will forget old rate measurements.)
1316 Exim now checks that the per_* options are used with an update mode that
1317 makes sense for the current ACL. For example, when Exim is processing a
1318 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1319 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1320 must specify per_mail/readonly. If you omit the update mode it defaults to
1321 /leaky where that makes sense (as before) or /readonly where required.
1323 The /noupdate option is now undocumented but still supported for
1324 backwards compatibility. It is equivalent to /readonly except that in
1325 ACLs where /readonly is required you may specify /leaky/noupdate or
1326 /strict/noupdate which are treated the same as /readonly.
1328 A useful new feature is the /count= option. This is a generalization
1329 of the per_byte option, so that you can measure the throughput of other
1330 aggregate values. For example, the per_byte option is now equivalent
1331 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1333 The per_rcpt option has been generalized using the /count= mechanism
1334 (though it's more complicated than the per_byte equivalence). When it is
1335 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1336 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1337 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1338 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1339 Note that using per_rcpt with a non-readonly update mode in more than
1340 one ACL will cause the recipients to be double-counted. (The per_mail
1341 and per_byte options don't have this problem.)
1343 The handling of very low rates has changed slightly. If the computed rate
1344 is less than the event's count (usually one) then this event is the first
1345 after a long gap. In this case the rate is set to the same as this event's
1346 count, so that the first message of a spam run is counted properly.
1348 The major new feature is a mechanism for counting the rate of unique
1349 events. The new per_addr option counts the number of different
1350 recipients that someone has sent messages to in the last time period. It
1351 behaves like per_rcpt if all the recipient addresses are different, but
1352 duplicate recipient addresses do not increase the measured rate. Like
1353 the /count= option this is a general mechanism, so the per_addr option
1354 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1355 example, measure the rate that a client uses different sender addresses
1356 with the options per_mail/unique=$sender_address. There are further
1357 details in the main documentation.
1359 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1361 TF/06 Removed a few PCRE remnants.
1363 TF/07 Automatically extract Exim's version number from tags in the git
1364 repository when doing development or release builds.
1366 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1367 Bugzilla 879. Patch from Paul Fisher.
1369 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1370 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1373 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1375 PP/05 Variable $av_failed, true if the AV scanner deferred.
1376 Bugzilla 1078. Patch from John Horne.
1378 PP/06 Stop make process more reliably on build failure.
1379 Bugzilla 1087. Patch from Heiko Schlittermann.
1381 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1382 Bugzilla 1089. Patch from Heiko Schlittermann.
1384 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1385 Bugzilla 1131. Patch from Holger Weiß.
1387 PP/09 Handle IPv6 addresses with SPF.
1388 Bugzilla 860. Patch from Wolfgang Breyha.
1390 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1392 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1395 PP/11 match_* no longer expand right-hand-side by default.
1396 New compile-time build option, EXPAND_LISTMATCH_RHS.
1397 New expansion conditions, "inlist", "inlisti".
1399 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1401 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1403 PP/14 fix log_write() format string regression from TF/03.
1404 Bugzilla 1152. Patch from Dmitry Isaikin.
1410 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1412 PP/02 Harmonised TLS library version reporting; only show if debugging.
1413 Layout now matches that introduced for other libraries in 4.74 PP/03.
1415 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1417 PP/04 New "dns_use_edns0" global option.
1419 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1422 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1423 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1425 TK/01 Updated PolarSSL code to 0.14.2.
1426 Bugzilla 1097. Patch from Andreas Metzler.
1428 PP/07 Catch divide-by-zero in ${eval:...}.
1429 Fixes bugzilla 1102.
1431 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1434 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1435 format-string attack -- SECURITY: remote arbitrary code execution.
1437 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1438 time unintentionally subject to list matching rules, letting the header
1439 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1440 arbitrary string expansion). This allowed for information disclosure.
1442 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1443 INT_MIN/-1 -- value coerced to INT_MAX.
1449 NM/01 Workaround for PCRE version dependency in version reporting
1452 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1453 This fixes portability to compilers other than gcc, notably
1454 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1456 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1457 makefiles for portability to HP-UX and POSIX correctness.
1459 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1460 Also via indented variable definition in the Makefile.
1461 (Debugging by Oliver Heesakkers).
1463 PP/02 Restore caching of spamd results with expanded spamd_address.
1464 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1466 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1467 Improves build reliability. Fix from: Frank Elsner
1469 NM/02 Fix wide character breakage in the rfc2047 coding
1470 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1472 NM/03 Allow underscore in dnslist lookups
1473 Fixes bug 1026. Patch from Graeme Fowler
1475 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1476 Code patches from Adam Ciarcinski of NetBSD.
1478 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1481 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1482 is logged, to avoid truncation. Patch from John Horne.
1484 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1485 Patch from Jakob Hirsch.
1487 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1488 SQL string expansion failure details.
1489 Patch from Andrey Oktyabrski.
1491 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1492 Patch from Simon Arlott.
1494 PP/09 New lookups functionality failed to compile on old gcc which rejects
1495 extern declarations in function scope.
1496 Patch from Oliver Fleischmann
1498 PP/10 Use sig_atomic_t for flags set from signal handlers.
1499 Check getgroups() return and improve debugging.
1500 Fixed developed for diagnosis in bug 927 (which turned out to be
1503 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1504 Patch from Mark Zealey.
1506 PP/12 Bugzilla 1056: Improved spamd server selection.
1507 Patch from Mark Zealey.
1509 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1510 Based on patch from Heiko Schlittermann.
1512 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1513 Patch from Uwe Doering, sign-off by Michael Haardt.
1515 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1516 variable declaration deep within a block. Bug and patch from
1519 PP/15 lookups-Makefile IRIX compatibility coercion.
1521 PP/16 Make DISABLE_DKIM build knob functional.
1523 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1524 Patch by Simon Arlott
1526 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1527 variable argument macros. Our copy now differs from upstream.
1533 TF/01 Failure to get a lock on a hints database can have serious
1534 consequences so log it to the panic log.
1536 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1537 controlled using the smtp_confirmation log selector.
1539 TF/03 Include the error message when we fail to unlink a spool file.
1541 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1542 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1543 for maintaining out-of-tree patches for some time.
1545 PP/01 Bugzilla 139: Documentation and portability issues.
1546 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1547 Handle per-OS dynamic-module compilation flags.
1549 PP/02 Let /dev/null have normal permissions.
1550 The 4.73 fixes were a little too stringent and complained about the
1551 permissions on /dev/null. Exempt it from some checks.
1552 Reported by Andreas M. Kirchwitz.
1554 PP/03 Report version information for many libraries, including
1555 Exim version information for dynamically loaded libraries. Created
1556 version.h, now support a version extension string for distributors
1557 who patch heavily. Dynamic module ABI change.
1559 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1560 privilege escalation vulnerability whereby the Exim run-time user
1561 can cause root to append content of the attacker's choosing to
1564 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1567 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1568 If dropping privileges for untrusted macros, we disabled normal logging
1569 on the basis that it would fail; for the Exim run-time user, this is not
1570 the case, and it resulted in successful deliveries going unlogged.
1571 Fixed. Reported by Andreas Metzler.
1577 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1578 only prepend for the Resent-* case. Fixes regression introduced in
1579 Exim 4.70 by NM/22 for Bugzilla 607.
1581 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1582 increasing numbers of administrators be bitten by this.
1584 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1586 PP/03 Bugzilla 994: added openssl_options main configuration option.
1588 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1590 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1592 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1594 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1595 without a peer certificate, leading to a segfault because of an
1596 assumption that peers always have certificates. Be a little more
1597 paranoid. Problem reported by Martin Tscholak.
1599 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1600 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1601 NB: ClamAV planning to remove STREAM in "middle of 2010".
1602 CL also introduces -bmalware, various -d+acl logging additions and
1603 more caution in buffer sizes.
1605 PP/09 Implemented reverse_ip expansion operator.
1607 PP/10 Bugzilla 937: provide a "debug" ACL control.
1609 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1611 PP/12 Bugzilla 973: Implement --version.
1613 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1615 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1617 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1619 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1620 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1621 ignore trailing whitespace.
1623 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1625 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1628 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1629 Notification from Dr Andrew Aitchison.
1631 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1632 ExtendedDetectionInfo response format.
1633 Notification from John Horne.
1635 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1638 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1639 XSL and documented dependency on system catalogs, with examples of how
1642 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1645 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1646 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1647 configuration file which is writeable by the Exim user or group.
1649 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1650 of configuration files to cover files specified with the -C option if
1651 they are going to be used with root privileges, not just the default
1654 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1655 option (effectively making it always true).
1657 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1658 files to be used while preserving root privileges.
1660 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1661 that rogue child processes cannot use them.
1663 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1664 run-time user, instead of root.
1666 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1667 Exim run-time user without dropping privileges.
1669 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1670 result string, instead of calling string_vformat() twice with the same
1673 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1674 for other users. Others should always drop root privileges if they use
1675 -C on the command line, even for a whitelisted configure file.
1677 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1679 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1685 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1686 $data_path, and $header_path variables; fixed documentation bugs and
1689 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1690 exipick to access non-standard spools, including the "frozen" queue
1693 NM/01 Bugzilla 965: Support mysql stored procedures.
1694 Patch from Alain Williams
1696 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1698 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1699 Patch from Andreas Metzler
1701 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1702 Patch from Kirill Miazine
1704 NM/05 Bugzilla 671: Added umask to procmail example.
1706 JJ/03 installed exipick 20100323.0, fixing doc bug
1708 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1709 directory. Notification and patch from Dan Rosenberg.
1711 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1713 TK/02 Improve log output when DKIM signing operation fails.
1715 MH/01 Treat the transport option dkim_domain as a colon separated
1716 list, not as a single string, and sign the message with each element,
1717 omitting multiple occurences of the same signer.
1719 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1720 Bugzilla 985, 986. Patch by Simon Arlott
1722 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1723 Patch by Simon Arlott
1725 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1726 MBX locking. Notification from Dan Rosenberg.
1732 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1734 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1736 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1738 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1740 NM/04 Bugzilla 915: Flag broken perl installation during build.
1746 TK/01 Added patch by Johannes Berg that expands the main option
1747 "spamd_address" if it starts with a dollar sign.
1749 TK/02 Write list of recipients to X-Envelope-Sender header when building
1750 the mbox-format spool file for content scanning (suggested by Jakob
1753 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1754 (http://www.dcc-servers.net/) support via dccifd. Activated by
1755 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1757 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1758 by Mark Daniel Reidel <mr@df.eu>.
1760 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1761 When building exim an external PCRE library is now needed -
1762 PCRE is a system library on the majority of modern systems.
1763 See entry on PCRE_LIBS in EDITME file.
1765 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1766 conversation. Added nologin parameter to request.
1767 Patch contributed by Kirill Miazine.
1769 TF/01 Do not log submission mode rewrites if they do not change the address.
1771 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1773 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1774 log files in place. Contributed by Roberto Lima.
1776 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1778 TF/03 Bugzilla 615: When checking the local_parts router precondition
1779 after a local_part_suffix or local_part_prefix option, Exim now
1780 does not use the address's named list lookup cache, since this
1781 contains cached lookups for the whole local part.
1783 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1784 Robert Millan. Documentation is in experimental-spec.txt.
1786 TF/04 Bugzilla 668: Fix parallel build (make -j).
1788 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1790 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1791 Patch provided by Jan Srzednicki.
1793 TF/05 Leading white space used to be stripped from $spam_report which
1794 wrecked the formatting. Now it is preserved.
1796 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1797 that they are available at delivery time.
1799 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1801 TF/08 TLS error reporting now respects the incoming_interface and
1802 incoming_port log selectors.
1804 TF/09 Produce a more useful error message if an SMTP transport's hosts
1805 setting expands to an empty string.
1807 NM/06 Bugzilla 744: EXPN did not work under TLS.
1808 Patch provided by Phil Pennock.
1810 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1811 Patch provided by Richard Godbee.
1813 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1814 acl_smtp_notquit, added index entry.
1816 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1817 Patch provided by Eugene Bujak.
1819 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1820 accept(). Patch provided by Maxim Dounin.
1822 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1823 Patch provided by Phil Pennock.
1825 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1827 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1828 Patch provided by Brad "anomie" Jorsch.
1830 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1831 Patch provided by Dean Brooks.
1833 TK/05 Add native DKIM support (does not depend on external libraries).
1835 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1836 Patch provided by Graeme Fowler.
1838 NM/16 Bugzilla 851: Documentation example syntax fix.
1840 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1842 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1845 NM/19 Bugzilla 745: TLS version reporting.
1846 Patch provided by Phil Pennock.
1848 NM/20 Bugzilla 167: bool: condition support.
1849 Patch provided by Phil Pennock.
1851 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1852 clients. Patch provided by Phil Pennock.
1854 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1855 Patch provided by Brad "anomie" Jorsch.
1857 NM/23 Bugzilla 687: Fix misparses in eximstats.
1858 Patch provided by Heiko Schlittermann.
1860 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1861 Patch provided by Heiko Schlittermann.
1863 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1864 plus update to original patch.
1866 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1868 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1869 Patch provided by David Brownlee.
1871 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1873 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1875 NM/30 Bugzilla 888: TLS documentation bugfixes.
1877 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1879 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1880 Unlike the original bugzilla I have changed all shell scripts in src tree.
1882 NM/33 Bugzilla 898: Transport filter timeout fix.
1883 Patch by Todd Rinaldo.
1885 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1886 Patch by Serge Demonchaux.
1888 NM/35 Bugzilla 39: Base64 decode bug fixes.
1889 Patch by Jakob Hirsch.
1891 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1893 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1895 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1897 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1903 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1904 ALT-N's libdkim that I have put here:
1905 http://duncanthrax.net/exim-experimental/
1907 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1908 were called 'true' and it seems that C99 defines that as a reserved
1909 keyword to be used with 'bool' variable types. That means you could
1910 not include C99-style headers which use bools without triggering
1911 build errors in sieve.c.
1913 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1914 as mailq or other aliases. Changed the --help handling significantly
1915 to do whats expected. exim_usage() emits usage/help information.
1917 SC/01 Added the -bylocaldomain option to eximstats.
1919 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1921 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1923 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1929 PH/01 Another patch from the Sieve maintainer.
1931 PH/02 When an IPv6 address is converted to a string for single-key lookup
1932 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1933 dots are used instead of colons so that keys in lsearch files need not
1934 contain colons. This was done some time before quoting was made available
1935 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1936 (notated using the quote facility) so as to distinguish them from IPv4
1937 keys. This meant that lookups for IP addresses in host lists did not work
1938 for iplsearch lookups.
1940 This has been fixed by arranging for IPv6 addresses to be expressed with
1941 colons if the lookup type is iplsearch. This is not incompatible, because
1942 previously such lookups could never work.
1944 The situation is now rather anomalous, since one *can* have colons in
1945 ordinary lsearch keys. However, making the change in all cases is
1946 incompatible and would probably break a number of configurations.
1948 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1951 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1952 conversion specification without a maximum field width, thereby enabling
1953 a rogue spamd server to cause a buffer overflow. While nobody in their
1954 right mind would setup Exim to query an untrusted spamd server, an
1955 attacker that gains access to a server running spamd could potentially
1956 exploit this vulnerability to run arbitrary code as the Exim user.
1958 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1959 $primary_hostname instead of what libspf2 thinks the hosts name is.
1961 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1962 a directory entry by the name of the lookup key. Previously, if a
1963 symlink pointed to a non-existing file or a file in a directory that
1964 Exim lacked permissions to read, a lookup for a key matching that
1965 symlink would fail. Now it is enough that a matching directory entry
1966 exists, symlink or not. (Bugzilla 503.)
1968 PH/03 The body_linecount and body_zerocount variables are now exported in the
1971 PH/04 Added the $dnslist_matched variable.
1973 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1974 This means they are set thereafter only if the connection becomes
1977 PH/06 Added the client_condition to authenticators so that some can be skipped
1978 by clients under certain conditions.
1980 PH/07 The error message for a badly-placed control=no_multiline_responses left
1981 "_responses" off the end of the name.
1983 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1985 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1986 (without spaces) instead of just copying the configuration text.
1988 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1990 PH/11 Added $max_received_linelength.
1992 PH/12 Added +ignore_defer and +include_defer to host lists.
1994 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1995 way in which PCRE > 7.0 is built.
1997 PH/14 Implemented queue_only_load_latch.
1999 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2000 MAIL command. The effect was to mangle the value on 64-bit systems.
2002 PH/16 Another patch from the Sieve maintainer.
2004 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2006 PH/18 If a system quota error occurred while trying to create the file for
2007 a maildir delivery, the message "Mailbox is full" was not appended to the
2008 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2009 only to a quota excession during the actual writing of the file.
2011 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2012 characters?) which causes problems in log lines. The DN values are now
2013 passed through string_printing() before being added to log lines.
2015 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2016 and InterBase are left for another time.)
2018 PH/21 Added message_body_newlines option.
2020 PH/22 Guard against possible overflow in moan_check_errorcopy().
2022 PH/23 POSIX allows open() to be a macro; guard against that.
2024 PH/24 If the recipient of an error message contained an @ in the local part
2025 (suitably quoted, of course), incorrect values were put in $domain and
2026 $local_part during the evaluation of errors_copy.
2032 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2033 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2036 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2037 issue a MAIL command.
2039 PH/02 In an ACL statement such as
2041 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2043 if a client was not listed at all, or was listed with a value other than
2044 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2045 the condition was not true (as it should be), so access was not denied.
2046 The bug was that the ! inversion was incorrectly passed on to the second
2047 item. This has been fixed.
2049 PH/03 Added additional dnslists conditions == and =& which are different from
2050 = and & when the dns lookup returns more than one IP address.
2052 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2053 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2055 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2056 FSYNC, which compiles an option called disable_fsync that allows for
2057 bypassing fsync(). The documentation is heavily laced with warnings.
2059 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2061 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2062 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2063 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2064 including adding "make clean"; (3) Added -fPIC when compiling the test
2065 dynamically loaded module, to get rid of a warning.
2067 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2068 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2069 = 0s. The bug is otherwise harmless.
2071 PH/07 There was a bug in the dovecot authenticator such that the value of
2072 $auth1 could be overwritten, and so not correctly preserved, after a
2073 successful authentication. This usually meant that the value preserved by
2074 the server_setid option was incorrect.
2076 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2078 PH/09 Installed PCRE release 7.0.
2080 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2081 run for batched SMTP input. It is now run at the start of every message
2082 in the batch. While fixing this I discovered that the process information
2083 (output by running exiwhat) was not always getting set for -bs and -bS
2084 input. This is fixed, and it now also says "batched" for BSMTP.
2086 PH/11 Added control=no_pipelining.
2088 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2089 patch, slightly modified), and move the expansion of helo_data till after
2090 the connection is made in the smtp transport (so it can use these
2093 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2095 PH/14 Added log_selector = +pid.
2097 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2099 PH/16 Add ${if forany and ${if forall.
2101 PH/17 Added dsn_from option to vary the From: line in DSNs.
2103 PH/18 Flush SMTP output before performing a callout, unless control =
2104 no_callout_flush is set.
2106 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2107 was true (the default) a successful delivery failed to delete the retry
2108 item, thus causing premature timeout of the address. The bug is now
2111 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2113 PH/21 Long custom messages for fakedefer and fakereject are now split up
2114 into multiline responses in the same way that messages for "deny" and
2115 other ACL rejections are.
2117 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2118 with slight modification.
2120 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2121 draft, changing the syntax and factoring some duplicate code".
2123 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2124 for deliveries of the second and subsequent messages over the same SMTP
2127 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2128 ${reduce, with only minor "tidies".
2130 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2132 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2133 expansion side effects.
2135 PH/27 When a message times out after an over-quota error from an Exim-imposed
2136 quota, the bounce message says "mailbox is full". This message was not
2137 being given when it was a system quota that was exceeded. It now should
2140 MH/03 Made $recipients available in local_scan(). local_scan() already has
2141 better access to the recipient list through recipients_list[], but
2142 $recipients can be useful in postmaster-provided expansion strings.
2144 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2145 in the case of a MAIL command with additional options following the
2146 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2147 were accidentally chopped off.
2149 PH/29 SMTP synchronization checks are implemented when a command is read -
2150 there is a check that no more input is waiting when there shouldn't be
2151 any. However, for some commands, a delay in an ACL can mean that it is
2152 some time before the response is written. In this time, more input might
2153 arrive, invalidly. So now there are extra checks after an ACL has run for
2154 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2155 pipelining has not been advertised.
2157 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2159 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2160 returned in the SMTP response when smtp_return_error_details was false.
2161 This has been fixed.
2163 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2164 instead of the C I/O that was originally supplied, because problems were
2165 reported on Solaris.
2167 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2168 Exim which did not show up earlier: it was assuming that a call to
2169 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2170 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2171 was a macro that became an assignment, so it seemed to work. This has
2172 changed to a proper function call with a void return, hence the compile
2173 error. Exim's code has been fixed.
2175 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2178 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2180 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2182 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2183 because it turns out to be too big or there is a timeout) there is no
2184 "Completed" line in the log. When some messages of this type were
2185 selected by exigrep, they were listed as "not completed". Others were
2186 picked up by some special patterns. I have improved the selection
2187 criteria to be more general.
2189 PH/38 The host_find_failed option in the manualroute router can now be set
2190 to "ignore", to completely ignore a host whose IP address cannot be
2191 found. If all hosts are ignored, the behaviour is controlled by the new
2192 host_all_ignored option.
2194 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2195 homing or because of multiple MX records with /mx) generated more than
2196 one IP address, and the following item turned out to be the local host,
2197 all the secondary addresses of the first item were incorrectly removed
2198 from the list, along with the local host and any following hosts (which
2199 is what is supposed to happen).
2201 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2202 whoever called Exim into the -H file. In the case of the daemon it was
2203 behaving confusingly. When first started, it used values for whoever
2204 started the daemon, but after a SIGHUP it used the Exim user (because it
2205 calls itself on a restart). I have changed the code so that it now always
2208 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2209 message are rejected with the same error (e.g. no authentication or bad
2210 sender address), and a DATA command is nevertheless sent (as can happen
2211 with PIPELINING or a stupid MUA), the error message that was given to the
2212 RCPT commands is included in the rejection of the DATA command. This is
2213 intended to be helpful for MUAs that show only the final error to their
2216 PH/42 Another patch from the Sieve maintainer.
2218 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2219 Eximstats - Fixed some broken HTML links and added missing column headers
2221 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2222 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2224 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2226 PH/43 Yet another patch from the Sieve maintainer.
2228 PH/44 I found a way to check for a TCP/IP connection going away before sending
2229 the response to the final '.' that terminates a message, but only in the
2230 case where the client has not sent further data following the '.'
2231 (unfortunately, this is allowed). However, in many cases there won't be
2232 any further data because there won't be any more messages to send. A call
2233 to select() can be used: if it shows that the input is "ready", there is
2234 either input waiting, or the socket has been closed. An attempt to read
2235 the next input character can distinguish the two cases. Previously, Exim
2236 would have sent an OK response which the client would never have see.
2237 This could lead to message repetition. This fix should cure that, at
2238 least in a lot of common cases.
2240 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2241 advertised in response to EHLO.
2247 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2248 fixed by 4.65/MH/01 (is this a record?) are fixed:
2250 (i) An empty string was always treated as zero by the numeric comparison
2251 operators. This behaviour has been restored.
2253 (ii) It is documented that the numeric comparison operators always treat
2254 their arguments as decimal numbers. This was broken in that numbers
2255 starting with 0 were being interpreted as octal.
2257 While fixing these problems I realized that there was another issue that
2258 hadn't been noticed. Values of message_size_limit (both the global option
2259 and the transport option) were treated as octal if they started with 0.
2260 The documentation was vague. These values are now always treated as
2261 decimal, and I will make that clear in the documentation.
2267 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2268 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2271 MH/01 Don't check that the operands of numeric comparison operators are
2272 integers when their expansion is in "skipping" mode (fixes bug
2273 introduced by 4.64-PH/07).
2275 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2276 child addresses, Exim now panics and dies. Previously, because the count
2277 is held in a short int, deliveries were likely to be lost. As such a
2278 large number of recipients for a single message is ridiculous
2279 (performance will be very, very poor), I have chosen to impose a limit
2280 rather than extend the field.
2286 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2287 leftover -K file (the existence of which was triggered by #402).
2288 While we were at it, introduced process PID as part of the -K
2289 filename. This should rule out race conditions when creating
2292 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2293 processing considerably. Previous code took too long for large mails,
2294 triggering a timeout which in turn triggers #401.
2296 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2297 in the DK code in transports.c. sendfile() is not really portable,
2298 hence the _LINUX specificness.
2300 TF/01 In the add_headers option to the mail command in an Exim filter,
2301 there was a bug that Exim would claim a syntax error in any
2302 header after the first one which had an odd number of characters
2305 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2306 callout verification, Exim cached a "reject" for the entire domain. This
2307 is correct for most verifications, but it is not correct for a recipient
2308 verification with use_sender or use_postmaster set, because in that case
2309 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2310 case of MAIL FROM:<> rejection from other early rejections (e.g.
2311 rejection of HELO). When verifying a recipient using a non-null MAIL
2312 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2313 Whatever the result of the callout, the value of the domain cache is
2314 left unchanged (for any other kind of callout, getting as far as trying
2315 RCPT means that the domain itself is ok).
2317 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2320 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2321 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2322 session, the daemon ignores ECONNECT errors and logs others; it now
2323 ignores EPIPE as well.
2325 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2326 (quoted-printable decoding).
2328 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2329 later the small subsequent patch to fix an introduced bug.
2331 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2333 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2335 PH/08 An error is now given if message_size_limit is specified negative.
2337 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2338 to be given (somewhat) arbitrary names.
2340 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2343 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2344 miscellaneous code fixes
2346 PH/10 Added the log_reject_target ACL modifier to specify where to log
2349 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2350 hostname. This is wrong, because it relates to the incoming message (and
2351 probably the interface on which it is arriving) and not to the outgoing
2352 callout (which could be using a different interface). This has been
2353 changed to use the value of the helo_data option from the smtp transport
2354 instead - this is what is used when a message is actually being sent. If
2355 there is no remote transport (possible with a router that sets up host
2356 addresses), $smtp_active_hostname is used.
2358 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2359 tweaks were necessary in order to get it to work (see also 21 below):
2360 (a) The code assumed that strncpy() returns a negative number on buffer
2361 overflow, which isn't the case. Replaced with Exim's string_format()
2363 (b) There were several signed/unsigned issues. I just did the minimum
2364 hacking in of casts. There is scope for a larger refactoring.
2365 (c) The code used strcasecmp() which is not a standard C function.
2366 Replaced with Exim's strcmpic() function.
2367 (d) The code set only $1; it now sets $auth1 as well.
2368 (e) A simple test gave the error "authentication client didn't specify
2369 service in request". It would seem that Dovecot has changed its
2370 interface. Fortunately there's a specification; I followed it and
2371 changed what the client sends and it appears to be working now.
2373 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2376 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2377 address A is aliased to B and C, where B exists and C does not. Without
2378 -v the output is "A verified" because verification stops after a
2379 successful redirection if more than one address is generated. However,
2380 with -v the child addresses are also verified. Exim was outputting "A
2381 failed to verify" and then showing the successful verification for C,
2382 with its parentage. It now outputs "B failed to verify", showing B's
2383 parentage before showing the successful verification of C.
2385 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2386 look up a TXT record in a specific list after matching in a combined
2389 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2390 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2391 they consult the DNS. I had assumed they would set it the way they
2392 wanted; and indeed my experiments on Linux seem to show that in some
2393 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2394 To be on the safe side, however, I have now made the interface to
2395 host_find_byname() similar to host_find_bydns(), with an argument
2396 containing the DNS resolver options. The host_find_byname() function now
2397 sets these options at its start, just as host_find_bydns() does. The smtp
2398 transport options dns_qualify_single and dns_search_parents are passed to
2399 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2400 of host_find_byname() use the default settings of RES_DEFNAMES
2401 (qualify_single) but not RES_DNSRCH (search_parents).
2403 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2404 spool_read_header() do less string testing, by means of a preliminary
2405 switch on the second character of optional "-foo" lines. (This is
2406 overdue, caused by the large number of possibilities that now exist.
2407 Originally there were few.) While I was there, I also converted the
2408 str(n)cmp tests so they don't re-test the leading "-" and the first
2409 character, in the hope this might squeeze out yet more improvement.
2411 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2412 flag allowing group syntax was set by the header_syntax check but not
2413 turned off, possible causing trouble later; (2) The flag was not being
2414 set at all for the header_verify test, causing "group"-style headers to
2415 be rejected. I have now set it in this case, and also caused header_
2416 verify to ignore an empty address taken from a group. While doing this, I
2417 came across some other cases where the code for allowing group syntax
2418 while scanning a header line wasn't quite right (mostly, not resetting
2419 the flag correctly in the right place). These bugs could have caused
2420 trouble for malformed header lines. I hope it is now all correct.
2422 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2423 with the "reply" argument non-NULL. The code, however (which originally
2424 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2425 but it didn't always do it. This confused somebody who was copying the
2426 code for some other use. I have removed all the tests.
2428 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2429 feature that was used to support insecure browsers during the U.S. crypto
2430 embargo. It requires special client support, and Exim is probably the
2431 only MTA that supported it -- and would never use it because real RSA is
2432 always available. This code has been removed, because it had the bad
2433 effect of slowing Exim down by computing (never used) parameters for the
2434 RSA_EXPORT functionality.
2436 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2437 authenticator to fail if there's a tab character in the incoming data
2438 (there should never be unless someone is messing about, as it's supposed
2439 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2440 if the connection is using TLS or if the remote IP is the same as the
2441 local IP, and the "valid-client-cert option" if a client certificate has
2444 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2445 authenticators. This can be used for authorization after authentication
2446 succeeds. (In the case of plaintext, it servers for both authentication
2449 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2450 if any retry times were supplied.
2452 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2453 connection, where there is no client IP address to check. In this
2454 situation, the verify now always succeeds.
2456 PH/25 Applied John Jetmore's -Mset patch.
2458 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2460 PH/27 In a string expansion for a processed (not raw) header when multiple
2461 headers of the same name were present, leading whitespace was being
2462 removed from all of them, but trailing whitespace was being removed only
2463 from the last one. Now trailing whitespace is removed from each header
2464 before concatenation. Completely empty headers in a concatenation (as
2465 before) are ignored.
2467 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2468 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2470 PH/29 [Removed. This was a change that I later backed out, and forgot to
2471 correct the ChangeLog entry (that I had efficiently created) before
2472 committing the later change.]
2474 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2475 address errors (4xx response to RCPT) over the same connection as other
2476 messages routed to the same hosts. Such deliveries are always "forced",
2477 so retry times are not inspected. This resulted in far too many retries
2478 for the affected addresses. The effect occurred only when there were more
2479 hosts than the hosts_max_try setting in the smtp transport when it had
2480 the 4xx errors. Those hosts that it had tried were not added to the list
2481 of hosts for which the message was waiting, so if all were tried, there
2482 was no problem. Two fixes have been applied:
2484 (i) If there are any address or message errors in an SMTP delivery, none
2485 of the hosts (tried or untried) are now added to the list of hosts
2486 for which the message is waiting, so the message should not be a
2487 candidate for sending over the same connection that was used for a
2488 successful delivery of some other message. This seems entirely
2489 reasonable: after all the message is NOT "waiting for some host".
2490 This is so "obvious" that I'm not sure why it wasn't done
2491 previously. Hope I haven't missed anything, but it can't do any
2492 harm, as the worst effect is to miss an optimization.
2494 (ii) If, despite (i), such a delivery is accidentally attempted, the
2495 routing retry time is respected, so at least it doesn't keep
2496 hammering the server.
2498 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2499 in ${readsocket because some servers need this prod.
2501 PH/32 Added some extra debug output when updating a wait-xxx database.
2503 PH/33 The hint "could be header name not terminated by colon", which has been
2504 given for certain expansion errors for a long time, was not being given
2505 for the ${if def:h_colon_omitted{... case.
2507 PH/34 The spec says: "With one important exception, whenever a domain list is
2508 being scanned, $domain contains the subject domain." There was at least
2509 one case where this was not true.
2511 PH/35 The error "getsockname() failed: connection reset by peer" was being
2512 written to the panic log as well as the main log, but it isn't really
2513 panic-worthy as it just means the connection died rather early on. I have
2514 removed the panic log writing for the ECONNRESET error when getsockname()
2517 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2518 runs only) independently of the message's sender address. This meant
2519 that, if the 4xx error was in fact related to the sender, a different
2520 message to the same recipient with a different sender could confuse
2521 things. In particular, this can happen when sending to a greylisting
2522 server, but other circumstances could also provoke similar problems.
2523 I have changed the default so that the retry time for these errors is now
2524 based a combination of the sender and recipient addresses. This change
2525 can be overridden by setting address_retry_include_sender=false in the
2528 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2529 remote server are returned as part of bounce messages. This was not
2530 happening for LMTP over a pipe (the lmtp transport), but now it is the
2531 same for both kinds of LMTP.
2533 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2534 in header lines that were in fact CNAMEs. This is no longer the case.
2536 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2537 and queue runs started by the daemon processed all messages. This has
2538 been fixed so that -R and -S can now usefully be given with -q<time>.
2540 PH/40 Import PCRE release 6.7 (fixes some bugs).
2542 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2544 PH/42 Give an error if -q is specified more than once.
2546 PH/43 Renamed the variables $interface_address and $interface_port as
2547 $received_ip_address and $received_port, to make it clear that these
2548 values apply to message reception, and not to the outgoing interface when
2549 a message is delivered. (The old names remain recognized, of course.)
2551 PH/44 There was no timeout on the connect() call when using a Unix domain
2552 socket in the ${readsocket expansion. There now is.
2554 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2555 be meaningful with "accept".
2557 SC/01 Eximstats V1.43
2558 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2560 SC/02 Eximstats V1.44
2561 Use a glob alias rather than an array ref in the generated
2562 parser. This improves both readability and performance.
2564 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2565 Collect SpamAssassin and rejection statistics.
2566 Don't display local sender or destination tables unless
2567 there is data to show.
2568 Added average volumes into the top table text output.
2570 SC/04 Eximstats V1.46
2571 Collect data on the number of addresses (recipients)
2572 as well as the number of messages.
2574 SC/05 Eximstats V1.47
2575 Added 'Message too big' to the list of mail rejection
2576 reasons (thanks to Marco Gaiarin).
2578 SC/06 Eximstats V1.48
2579 Mainlog lines which have GMT offsets and are too short to
2580 have a flag are now skipped.
2582 SC/07 Eximstats V1.49 (Alain Williams)
2583 Added the -emptyok flag.
2585 SC/08 Eximstats V1.50
2586 Fixes for obtaining the IP address from reject messages.
2588 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2589 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2590 whitespace changes from 4.64-PH/27
2592 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2595 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2596 are found, allow negative numbers in numeric criteria)
2598 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2600 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2601 to match changes made in 4.64-PH/43
2603 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2605 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2606 "domain" is actually an IP address, and force a failure. This locks out
2607 those revolvers/nameservers that support "A-for-A" lookups, in
2608 contravention of the specifications.
2610 PH/48 When a host name was looked up from an IP address, and the subsequent
2611 forward lookup of the name timed out, the host name was left in
2612 $sender_host_name, contrary to the specification.
2614 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2615 restricted to single-key lookups, Exim was not diagnosing an error if
2616 * or *@ was used with a query-style lookup.
2618 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2620 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2621 long ago, but noone interested enough thought of it. Let's just say that
2622 the "1.1" means that there are some new functions that weren't there at
2623 some point in the past.
2625 PH/51 Error processing for expansion failure of helo_data from an smtp
2626 transport during callout processing was broken.
2628 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2629 tested/used via the -bh/-bhc/-bs options.
2631 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2632 bug, fixed in subsequent PCRE releases).
2634 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2635 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2637 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2643 SC/01 Use a glob alias rather than an array ref in eximstats generated
2644 parser. This improves both readability and performance.
2646 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2647 Don't display local sender or destination tables in eximstats unless
2648 there is data to show.
2649 Added average volumes into the eximstats top table text output.
2651 SC/03 Collect data on the number of addresses (recipients) as well
2652 as the number of messages in eximstats.
2654 TF/01 Correct an error in the documentation for the redirect router. Exim
2655 does (usually) call initgroups() when daemonizing.
2657 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2658 with consistent privilege compared to when running as a daemon.
2660 TF/03 Note in the spec that $authenticated_id is not set for local
2661 submissions from trusted users.
2663 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2664 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2666 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2667 by adding some example configuration directives to the default
2668 configuration file. A little bit of work is required to uncomment the
2669 directives and define how usernames and passwords are checked, but
2670 there is now a framework to start from.
2672 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2673 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2674 without this. I don't know how relevant this is to other LDAP libraries.
2676 PH/02 Add the verb name to the "unknown ACL verb" error.
2678 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2680 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2682 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2683 directory not expanded when it should be if an expanded home directory
2684 was set for the address (which is overridden by the transport).
2686 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2689 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2690 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2691 because it is too late at that time, and has no effect.
2693 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2694 security issue with \' (bugzilla #107). I could not use the
2695 PQescapeStringConn() function, because it needs a PGconn value as one of
2698 PH/08 When testing addresses using -bt, indicate those final addresses that
2699 are duplicates that would not cause an additional delivery. At least one
2700 person was confused, thinking that -bt output corresponded to deliveries.
2701 (Suppressing duplicates isn't a good idea as you lose the information
2702 about possibly different redirections that led to the duplicates.)
2704 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2705 systems where poll() doesn't work, in particular OS X.
2707 PH/10 Added more information to debugging output for retry time not reached.
2709 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2710 operations in malware.c.
2712 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2715 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2716 syslog_duplication set false, log lines that would normally be written
2717 both the the main log and to the reject log were not written to syslog at
2720 PH/14 In the default configuration, change the use of "message" in ACL warn
2721 statements to "add_header".
2723 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2724 not followed by a command (e.g. "seen endif").
2726 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2727 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2730 PH/17 Added extra conditions to the default value of delay_warning_condition
2734 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2735 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2736 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2739 The Auto-Submitted: and various List- headers are standardised, whereas I
2740 don't think Precedence: ever was.
2742 PH/18 Refactored debugging code in route_finduser() to show more information,
2743 in particular, the error code if getpwnam() issues one.
2745 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2746 This is apparently needed in addition to the PH/07 change above to avoid
2747 any possible encoding problems.
2749 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2750 but not after initializing Perl.
2752 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2753 output them only if debugging. By default they are written stderr,
2754 apparently, which is not desirable.
2756 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2759 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2762 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2764 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2765 authenticated or an ident call has been made. Suppress the default
2766 values for $authenticated_id and $authenticated_sender (but permit -oMai
2767 and -oMas) when testing with -bh.
2769 PH/24 Re-jigged the order of the tests in the default configuration so that the
2770 tests for valid domains and recipients precede the DNS black list and CSA
2771 tests, on the grounds that those ones are more expensive.
2773 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2774 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2775 This bug exists in every version of Exim that I still have, right back to
2778 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2779 However, an attempt to turn on case-sensitivity in a regex key by
2780 including (?-i) didn't work because the subject string was already
2781 lowercased, and the effects were non-intuitive. It turns out that a
2782 one-line patch can be used to allow (?-i) to work as expected.
2788 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2789 other effects) broke the use of negated acl sub-conditions.
2791 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2794 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2795 "Deny" causes Exim to reject the incoming connection with a 554 error.
2796 Unfortunately, if there is a major crisis, such as a disk failure,
2797 tcp-wrappers gives "deny", whereas what one would like would be some
2798 kind of temporary error. A kludge has been added to help with this.
2799 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2800 554 error is used if errno is still zero or contains ENOENT (which occurs
2801 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2804 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2806 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2807 errors. Otherwise a message that provokes a temporary error (when other
2808 messages do not) can cause a whole host to time out.
2810 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2811 addresses were routed directly to files or pipes from a redirect router.
2812 File deliveries just didn't batch; pipe deliveries might have suffered
2815 PH/06 A failure to get a lock for a hints database would erroneously always say
2816 "Failed to get write lock", even when it was really a read lock.
2818 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2819 of 0600. This has been changed to use the value of the lockfile_mode
2820 option (which defaults to 0600).
2822 PH/08 Applied small patch from the Sieve maintainer.
2824 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2825 folder from quota calculations, a direct delivery into this folder messed
2826 up the contents of the maildirsize file. This was because the regex was
2827 used only to exclude .Trash (or whatever) when the size of the mailbox
2828 was calculated. There was no check that a delivery was happening into an
2829 excluded directory. This bug has been fixed by ignoring all quota
2830 processing for deliveries into excluded directories.
2832 PH/10 Added the maildirfolder_create_regex option to appendfile.
2838 PH/01 The code for finding all the local interface addresses on a FreeBSD
2839 system running IPv6 was broken. This may well have applied to all BSD
2840 systems, as well as to others that have similar system calls. The broken
2841 code found IPv4 interfaces correctly, but gave incorrect values for the
2842 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2843 that it would not match correctly against @[] and not recognize the IPv6
2846 PH/02 The ipliteral router was not recognizing addresses of the form user@
2847 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2849 PH/03 Added disable_ipv6.
2851 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2852 decoded form, because it is most often used to construct To: headers
2853 lines in autoreplies, and the decoded form may well be syntactically
2854 invalid. However, $reply_address has leading white space removed, and all
2855 newlines turned into spaces so that the autoreply transport does not
2858 PH/05 If group was specified without a user on a router, and no group or user
2859 was specified on a transport, the group from the router was ignored.
2861 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2862 for visible compile-time settings that can be used to change these
2863 numbers, for those that want even more. Backwards compatibility with old
2864 spool files has been maintained. However, going back to a previous Exim
2865 release will lost any variables that are in spool files.
2867 PH/07 Two small changes when running in the test harness: increase delay when
2868 passing a TCP/IP connection to a new process, in case the original
2869 process has to generate a bounce, and remove special handling of
2870 127.0.0.2 (sic), which is no longer necessary.
2872 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2873 be the same on different OS.
2875 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2878 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2879 whether --show-vars was specified or not
2881 JJ/02 exipick: Added support for new ACL variable spool format introduced
2884 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2885 syntactically invalid From: or Reply-to: line, and a filter used this to
2886 generate an autoreply, and therefore failed to obtain an address for the
2887 autoreply, Exim could try to deliver to a non-existent relative file
2888 name, causing unrelated and misleading errors. What now happens is that
2889 it logs this as a hard delivery error, but does not attempt to create a
2892 PH/11 The exinext utility has a -C option for testing purposes, but although
2893 the given file was scanned by exinext itself; it wasn't being passed on
2894 when Exim was called.
2896 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2897 an end-of-file indication when reading a command response.
2899 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2900 compiled. In many other places in Exim, IPv6 addresses are always
2901 recognized, so I have changed this. It also means that IPv4 domain
2902 literals of the form [IPV4:n.n.n.n] are now always recognized.
2904 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2905 used if the router is not running as root, for example, when verifying at
2906 ACL time, or when using -bh. The debugging output from this situation was
2907 non-existent - all you got was a failure to exec. I have made two
2910 (a) Failures to set uid/gid, the current directory, or a process leader
2911 in a subprocess such as that created by queryprogram now generate
2912 suitable debugging output when -d is set.
2914 (b) The queryprogram router detects when it is not running as root,
2915 outputs suitable debugging information if -d is set, and then runs
2916 the subprocess without attempting to change uid/gid.
2918 PH/15 Minor change to Makefile for building test_host (undocumented testing
2921 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2922 additional section of a DNS packet that returns MX or SRV records.
2923 Instead, it always explicitly searches for A/AAAA records. This avoids
2924 major problems that occur when a DNS server includes only records of one
2925 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2926 fixed another bug: if SRV records were looked up and the corresponding
2927 address records were *not* found in the additional section, the port
2928 values from the SRV records were lost.
2930 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2931 using the correct key (the original address) when searching the retry
2932 rules in order to find which one to use for generating the retry hint.
2934 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2935 adding the default one. Similarly, if it contains a Reply-To: header, the
2936 errors_reply_to option, if set, is not used.
2938 PH/19 When calculating a retry time, Exim used to measure the "time since
2939 failure" by looking at the "first failed" field in the retry record. Now
2940 it does not use this if it is later than than the arrival time of the
2941 message. Instead it uses the arrival time. This makes for better
2942 behaviour in cases where some deliveries succeed, thus re-setting the
2943 "first failed" field. An example is a quota failure for a huge message
2944 when small messages continue to be delivered. Without this change, the
2945 "time since failure" will always be short, possible causing more frequent
2946 delivery attempts for the huge message than are intended.
2947 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2949 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2950 $1, $2, $3) because the numerical variables can be reset during some
2951 expansion items (e.g. "match"), thereby losing the authentication data.
2953 PH/21 Make -bV show the size of off_t variables so that the test suite can
2954 decide whether to run tests for quotas > 2G.
2956 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2957 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2958 filecount value is greater than 2G or if a quota value is greater than 2G
2959 on a system where the size of off_t is not greater than 4, a panic error
2962 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2963 never match. The debug and -bh output now contains an explicit error
2964 message indicating a malformed IPv4 address or mask.
2966 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2967 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2968 PH/23 above applies.
2970 PH/25 Do not write to syslog when running in the test harness. The only
2971 occasion when this arises is a failure to open the main or panic logs
2972 (for which there is an explicit test).
2974 PH/26 Added the /no_tell option to "control=freeze".
2976 PH/27 If a host name lookup failed very early in a connection, for example, if
2977 the IP address matched host_lookup and the reverse lookup yielded a name
2978 that did not have a forward lookup, an error message of the form "no IP
2979 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2980 could be logged. Now it outputs the IP address instead of "NULL".
2982 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2983 allows the sender and the authenticated sender to be set when
2984 submitting a message from within Exim. Since child_open_exim() is
2985 documented for local_scan(), the new function should be too.
2987 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2988 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2989 results in an empty string is now treated as unset.
2991 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2993 PH/31 Added sender_verify_fail logging option.
2995 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2996 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2997 tidied the source and removed it altogether.
2999 PH/33 When a queue run was abandoned because the load average was too high, a
3000 log line was always written; now it is written only if the queue_run log
3001 selector is set. In addition, the log line for abandonment now contains
3002 information about the queue run such as the pid. This is always present
3003 in "start" and "stop" lines but was omitted from the "abandon" line.
3005 PH/34 Omit spaces between a header name and the colon in the error message that
3006 is given when verify = headers_syntax fails (if there are lots of them,
3007 the message gets confusing).
3009 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3010 names, as there are now some PTR records that contain slashes. This check
3011 is only to protect against broken name servers that fall over on strange
3012 characters, so the fact that it applies to all lookups doesn't matter.
3014 PH/36 Now that the new test suite is complete, we can remove some of the
3015 special code in Exim that was needed for the old test suite. For example,
3016 sorting DNS records because real resolvers return them in an arbitrary
3017 order. The new test suite's fake resolver always returns records in the
3020 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3021 bounces) except when queue_only is set, to avoid logging races between
3022 the different processes.
3024 PH/38 Panic-die if .include specifies a non-absolute path.
3026 PH/39 A tweak to the "H" retry rule from its user.
3028 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3029 a label. They prevented compilation on older perls.
3031 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3032 a warning to be raised on newish perls.
3034 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3035 on queue. Changes to match documented behaviour of showing count of
3036 messages matching specified criteria.
3038 PH/40 Changed the default ident timeout from 30s to 5s.
3040 PH/41 Added support for the use of login_cap features, on those BSD systems
3041 that have them, for controlling the resources used by pipe deliveries.
3043 PH/42 The content-scanning code uses fopen() to create files in which to put
3044 message data. Previously it was not paying any attention to the mode of
3045 the files. Exim runs with umask(0) because the rest of the code creates
3046 files with open(), and sets the required mode explicitly. Thus, these
3047 files were ending up world-writeable. This was not a big issue, because,
3048 being within the spool directory, they were not world-accessible. I have
3049 created a function called modefopen, which takes an additional mode
3050 argument. It sets umask(777), creates the file, chmods it to the required
3051 mode, then resets the umask. All the relevant calls to fopen() in the
3052 content scanning code have been changed to use this function.
3054 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3055 to 24 hours. This avoids potential overflow problems when processing G
3056 and H retry rules. I suspect nobody ever tinkers with this value.
3058 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3060 PH/45 When the plaintext authenticator is running as a client, the server's
3061 challenges are checked to ensure they are valid base64 strings. By
3062 default, the authentication attempt is cancelled if an invalid string is
3063 received. Setting client_ignore_invalid_base64 true ignores these errors.
3064 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3065 they are received. Thus, the responses can be made to depend on the
3066 challenges. If an invalid string is ignored, an empty string is placed in
3069 PH/46 Messages that are created by the autoreply transport now contains a
3070 References: header, in accordance with RFCs 2822 and 3834.
3072 PH/47 Added authenticated_sender_force to the smtp transport.
3074 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3076 PH/49 Installed latest patch from the Sieve maintainer.
3078 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3079 was also set, the appendfile transport was unnecessarily scanning a
3080 directory of message files (e.g. for maildir delivery) to find the count
3081 of files (along with the size), even though it did not need this
3082 information. It now does the scan only if it needs to find either the
3083 size of the count of files.
3085 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3087 PH/52 Two bugs concerned with error handling when the smtp transport is
3090 (i) Exim was not creating retry information for temporary errors given
3091 for individual recipients after the DATA command when the smtp transport
3092 was used in LMTP mode. This meant that they could be retried too
3093 frequently, and not timed out correctly.
3095 (ii) Exim was setting the flag that allows error details to be returned
3096 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3097 recipients that were returned after the DATA command.
3099 PH/53 This is related to PH/52, but is more general: for any failing address,
3100 when detailed error information was permitted to be returned to the
3101 sender, but the error was temporary, then after the final timeout, only
3102 "retry timeout exceeded" was returned. Now it returns the full error as
3103 well as "retry timeout exceeded".
3105 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3106 do this, and (what is worse) MTAs that accept it.
3108 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3109 will now be deprecated.
3111 PH/56 New os.c-cygwin from the Cygwin maintainer.
3113 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3114 formats (previously only available in exim formats via -bpr, -bpru,
3115 and -bpra. Now also available in native and exiqgrep formats)
3117 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3118 with very large, slow to parse queues
3120 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3122 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3124 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3125 responses to authentication challenges, though it was showing the
3126 challenges; (ii) I've removed the CR characters from the debug output for
3129 PH/58 Allow for the insertion of a newline as well as a space when a string
3130 is turned into more than one encoded-word during RFC 2047 encoding. The
3131 Sieve code now uses this.
3133 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3134 data_4xx, lost_connection, tls_required.
3136 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3137 message was being sent as an SMTP response.
3139 PH/61 Add -l and -k options to exicyclog.
3141 PH/62 When verifying, if an address was redirected to one new address, so that
3142 verification continued, and the new address failed or deferred after
3143 having set something in $address_data, the value of $address_data was not
3144 passed back to the ACL. This was different to the case when no
3145 redirection occurred. The value is now passed back in both cases.
3147 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3148 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3149 use login_cap.h, so on its own it isn't the distinguishing feature. The
3150 new name refers directly to the setclassresources() function.
3152 PH/65 Added configuration files for NetBSD3.
3154 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3156 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3157 is preferred over IPv4.
3159 PH/68 The bounce_return_message and bounce_return_body options were not being
3160 honoured for bounces generated during the reception of non-SMTP messages.
3161 In particular, this applied to messages rejected by the ACL. This bug has
3162 been fixed. However, if bounce_return_message is true and bounce_return_
3163 body is false, the headers that are returned for a non-SMTP message
3164 include only those that have been read before the error was detected.
3165 (In the case of an ACL rejection, they have all been read.)
3167 PH/69 The HTML version of the specification is now built in a directory called
3168 spec_html instead of spec.html, because the latter looks like a path with
3169 a MIME-type, and this confuses some software.
3171 PH/70 Catch two compiler warnings in sieve.c.
3173 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3174 function verify_get_ident() calls ip_connect() to connect a socket, but
3175 if the "connect()" function timed out, ip_connect() used to close the
3176 socket. However, verify_get_ident() also closes the socket later, and in
3177 between Exim writes to the log, which may get opened at this point. When
3178 the socket was closed in ip_connect(), the log could get the same file
3179 descriptor number as the socket. This naturally causes chaos. The fix is
3180 not to close the socket in ip_connect(); the socket should be closed by
3181 the function that creates it. There was only one place in the code where
3182 this was missing, in the iplookup router, which I don't think anybody now
3183 uses, but I've fixed it anyway.
3185 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3186 well as to direct DNS lookups. Otherwise the handling of names in host
3187 lists is inconsistent and therefore confusing.
3193 PH/01 Two changes to the default runtime configuration:
3195 (1) Move the checks for relay_from_hosts and authenticated clients from
3196 after to before the (commented out) DNS black list checks.
3198 (2) Add control=submission to the relay_from_hosts and authenticated
3199 clients checks, on the grounds that messages accepted by these
3200 statements are most likely to be submissions.
3202 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3204 (1) Generate an error if the third argument for the ${prvs expansion is
3207 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3210 (3) Reset the variables that are obtained from the first argument of
3211 ${prvscheck and used in the second argument before leaving the code,
3212 because their memory is reclaimed, so using them afterwards may do
3215 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3216 one (it's much easier than Tom thought :-).
3218 (5) Because of (4), we can now allow for the use of $prvscheck_result
3219 inside the third argument.
3221 PH/03 For some reason, the default setting of PATH when running a command from
3222 a pipe transport was just "/usr/bin". I have changed it to
3225 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3226 anything to be listed in the output from -bV.
3228 PH/05 When a filter generated an autoreply, the entire To: header line was
3229 quoted in the delivery log line, like this:
3231 => >A.N.Other <ano@some.domain> <original@ddress> ...
3233 This has been changed so that it extracts the operative address. There
3234 may be more than one such address. If so, they are comma-separated, like
3237 => >ano@some.domain,ona@other.domain <original@ddress> ...
3239 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3240 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3241 not being looked up in the rDNS to get a host name, Exim was showing the
3242 IP address twice in Received: lines, even though the IP addresses were
3243 identical. For example:
3245 Received: from [1.2.3.4] (helo=[1.2.3.4])
3247 However, if the real host name was known, it was omitting the HELO data
3248 if it matched the actual IP address. This has been tidied up so that it
3249 doesn't show the same IP address twice.
3251 PH/07 When both +timestamp and +memory debugging was on, the value given by
3252 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3253 called by the debug printing, thereby overwriting the timestamp buffer.
3254 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3256 PH/08 When the original message was included in an autoreply transport, it
3257 always said "this is a copy of the message, including all the headers",
3258 even if body_only or headers_only was set. It now gives an appropriate
3261 PH/09 Applied a patch from the Sieve maintainer which:
3263 o fixes some comments
3264 o adds the (disabled) notify extension core
3265 o adds some debug output for the result of if/elsif tests
3266 o points to the current vacation draft in the documentation
3267 and documents the missing references header update
3271 o fixes a bug in processing the envelope test (when testing
3272 multiple envelope elements, the last element determined the
3275 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3276 Electronic Mail") by including:
3278 Auto-submitted: auto-generated
3280 in the messages that it generates (bounce messages and others, such as
3281 warnings). In the case of bounce messages for non-SMTP messages, there was
3282 also a typo: it was using "Auto_submitted" (underscore instead of
3283 hyphen). Since every message generated by Exim is necessarily in response
3284 to another message, thes have all been changed to:
3286 Auto-Submitted: auto-replied
3288 in accordance with these statements in the RFC:
3290 The auto-replied keyword:
3292 - SHOULD be used on messages sent in direct response to another
3293 message by an automatic process,
3295 - MUST NOT be used on manually-generated messages,
3297 - MAY be used on Delivery Status Notifications (DSNs) and Message
3298 Disposition Notifications (MDNs),
3300 - MUST NOT be used on messages generated by automatic or periodic
3301 processes, except for messages which are automatic responses to
3304 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3305 to the default Received: header definition.
3307 PH/12 Added log selector acl_warn_skipped (default on).
3309 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3310 variables because (a) they are in the wrong storage pool and (b) even if
3311 they were copied, it wouldn't work properly because of the caching.
3313 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3314 checking when decoding. Apparently there are clients that generate
3315 overlong encoded strings. Why am I not surprised?
3317 PH/15 If the first argument of "${if match_address" was not empty, but did not
3318 contain an "@" character, Exim crashed. Now it writes a panic log message
3319 and treats the condition as false.
3321 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3323 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3324 extension "envelope-auth". The code is finished and in agreement with
3325 other implementations, but there is no documentation so far and in fact,
3326 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3327 not changing the active code.
3329 Print executed "if" and "elsif" statements when debugging is used. This
3330 helps a great deal to understand what a filter does.
3332 Document more things not specified clearly in RFC3028. I had all this
3333 sorted out, when out of a sudden new issues came to my mind. Oops."
3335 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3338 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3339 canonical form (as documented). However, after a host name lookup from
3340 the IP address, check_host() was doing a simple string comparison with
3341 addresses acquired from the DNS when checking that the found name did
3342 have the original IP as one of its addresses. Since any found IPv6
3343 addresses are likely to be in abbreviated form, the comparison could
3344 fail. Luckily, there already exists a function for doing the comparison
3345 by converting both addresses to binary, so now that is used instead of
3346 the text comparison.
3348 PH/20 There was another similar case to PH/19, when a complete host name was
3349 given in a host list; looking up its IP address could give an abbreviated
3350 form, whereas the current host's name might or might not be abbreviated.
3351 The same fix has been applied.
3357 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3358 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3361 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3362 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3364 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3366 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3367 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3368 Also, for "Auto-Submitted", treat anything other than "no" as
3369 non-personal, in accordance with RFC 3834. (Previously it treated
3370 anything starting "auto-" as non-personal.)
3372 TF/01 The control=submission/name=... option had a problem with syntax
3373 errors if the name included a slash character. The /name= option
3374 now slurps the rest of the string, so it can include any characters
3375 but it must come last in the list of options (after /sender_retain
3378 PH/05 Some modifications to the interface to the fake nameserver for the new
3386 TK/01 Added the "success_on_redirect" address verification option. See
3387 NewStuff for rationale and an example.
3389 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3391 PH/02 Patch to exigrep to allow it to work on syslog lines.
3393 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3394 fread() to skip over the body file's header line, because in Cygwin the
3395 header line is locked and is inaccessible.
3397 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3398 co-exist for some time) to make it clear that it is the Exim ID that is
3399 referenced, not the Message-ID: header line.
3401 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3402 string_format() function, because snprintf() does not exist on all
3405 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3406 ${stat: expansion item.
3408 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3409 protocol synchronization error", to keep the pedants happy.
3411 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3412 well as for IRIX systems, when gcc is being used. See the host.c source
3415 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3417 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3420 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3421 transport and to the smtp transport in LMTP mode.
3423 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3425 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3426 run a filter in a subprocess. This could lead to confusion in subsequent
3427 lookups in the parent process. There should also be a search_tidyup() at
3428 the end of the subprocess.
3430 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3431 only if the host matched helo_try_verify_hosts, which caused the
3432 verification to occur when the EHLO/HELO command was issued. The ACL just
3433 tested the remembered result. Now, if a previous verification attempt has
3434 not happened, "verify = helo" does it there and then.
3436 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3438 TK/03 Fix log output including CR from clamd.
3440 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3441 exist provoked a memory error which could cause a segfault.
3443 PH/15 Installed PCRE 6.2
3445 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3447 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3448 of the problem. Specifically, suggested +O2 rather than +O1 for the
3451 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3453 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3454 record, the port was not correctly logged when the outgoing_port log
3455 selector was set (it logged the transort's default port).
3457 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3458 fallback_hosts, and "hosts" in the smtp transport.
3460 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3461 host errors such as "Connection refused".
3463 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3464 authentication with radiusclient 0.4.9:
3466 - Error returned from rc_read_config was caught wrongly
3467 - Username/password not passed on to radius server due to wrong length.
3469 The presumption is that some radiusclient API changes for 4.51/PH/17
3470 were not taken care of correctly. The code is still untested by me (my
3471 Linux distribution still has 0.3.2 of radiusclient), but it was
3472 contributed by a Radius user.
3474 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3475 expanding the "port" option of the smtp transport.
3477 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3478 while reading a MIME header. Thanks to Tom Hughes for a patch.
3480 PH/24 Include config.h inside local_scan.h so that configuration settings are
3483 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3484 that in an ACL for RCPT (for example), you can examine exactly what was
3487 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3488 commands, but it was not correctly comparing the address with the actual
3489 client host address. Thus, it would show the EHLO address in Received:
3490 header lines when this was not necessary.
3492 PH/27 Added the % operator to ${eval:}.
3494 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3495 it should be ignoring failures (because with -C, for example, it has lost
3496 privilege). It wasn't ignoring creation failures other than "already
3499 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3502 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3503 because an input line was too long, either on its own, or by virtue of
3504 too many continuations, the temporary file was not being removed, and the
3505 return code was incorrect.
3507 PH/31 Missing "BOOL" in function definition in filtertest.c.
3509 PH/32 Applied Sieve patches from the maintainer.
3511 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3513 PH/33 Added "verify = not_blind".
3515 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3516 Local/Makefile (with some defaults set). These are used in built scripts
3517 such as exicyclog, but they have never been used in the exim_install
3518 script (though there are many overriding facilities there). I have
3519 arranged that the exim_install script now takes note of these two
3522 PH/35 Installed configuration files for Dragonfly.
3524 PH/36 When a locally submitted message by a trusted user did not contain a
3525 From: header, and the sender address was obtained from -f or from an SMTP
3526 MAIL command, and the trusted user did not use -F to supply a sender
3527 name, $originator_name was incorrectly used when constructing a From:
3528 header. Furthermore, $originator_name was used for submission mode
3529 messages from external hosts without From: headers in a similar way,
3530 which is clearly wrong.
3532 PH/37 Added control=suppress_local_fixups.
3534 PH/38 When log_selector = +received_sender was set, and the addition of the
3535 sender made the log line's construction buffer exactly full, or one byte
3536 less than full, an overflow happened when the terminating "\n" was
3539 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3540 when the result of a list match is failure because a DNS lookup failed.
3542 PH/40 RM_COMMAND is now used in the building process.
3544 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3545 the "build-* directories that it finds.
3547 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3548 address in a domain literal was a prefix of an interface address.
3550 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3551 when verifying a sender address, unless rewrite_headers is false.
3553 PH/44 Wrote a long comment about why errors_to addresses are verified as
3554 recipients, not senders.
3556 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3557 the ratelimit ACL was added.
3559 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3561 PH/46 Added extra information about PostgreSQL errors to the error string.
3563 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3564 avoiding the need to install special zones in a real server. This is
3565 backwards compatible; if it can't find the fake resolver, it drops back.
3566 Thus, both old and new test suites can be run.
3568 TF/02 Added util/ratelimit.pl
3570 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3571 clock is set back in time.
3573 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3574 Candler <B.Candler@pobox.com>.
3576 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3577 OK for addresses that are the result of redirections.
3579 PH/48 A number of further additions for the benefit of the new test suite,
3580 including a fake gethostbyname() that interfaces to the fake DNS resolver
3583 TF/06 The fix for widen_domains has also been applied to qualify_single and
3584 search_parents which are the other dnslookup options that can cause
3587 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3590 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3592 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3593 service" if it encountered an MX record with an empty target hostname.
3594 The message is now "an MX or SRV record indicated no SMTP service".
3596 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3597 if the DNS of the sending site is misconfigured. This is quite a
3598 common situation. This change restores the behaviour of treating a
3599 helo verification defer as a failure.
3601 PH/51 If self=fail was set on a router, the bounce message did not include the
3602 actual error message.
3608 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3610 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3611 command itself ended in error, the underlying message about the transport
3612 filter timeout was being overwritten with the pipe command error. Now the
3613 underlying error message should be appended to the second error message.
3615 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3617 PH/02 Reduce the amount of output that "make" produces by default. Full output
3618 can still be requested.
3620 PH/03 The warning log line about a condition test deferring for a "warn" verb
3621 was being output only once per connection, rather than after each
3622 occurrence (because it was using the same function as for successful
3623 "warn" verbs). This seems wrong, so I have changed it.
3625 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3626 it should not have, which might have caused a crash in the right
3627 circumstances, but probably never did.
3629 PH/04 Installed a modified version of Tony Finch's patch to make submission
3630 mode fix the return path as well as the Sender: header line, and to
3631 add a /name= option so that you can make the user's friendly name appear
3634 TF/03 Added the control = fakedefer ACL modifier.
3636 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3637 Mark Lowes for thorough testing.
3639 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3641 TK/03 Merged latest SRS patch from Miles Wilton.
3643 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3644 with the definition in sysexits.h (which is #included earlier).
3645 Fortunately, Exim does not actually use EX_OK. The code used to try to
3646 preserve the sysexits.h value, by assuming that macro definitions were
3647 scanned for macro replacements. I have been disabused of this notion,
3648 so now the code just undefines EX_OK before #including unistd.h.
3650 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3651 in the smtp transport. When a block could not be written in a single
3652 write() function, the timeout was being re-applied to each part-write.
3653 This seems wrong - if the receiver was accepting one byte at a time it
3654 would take for ever. The timeout is now adjusted when this happens. It
3655 doesn't have to be particularly precise.
3657 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3658 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3660 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3661 without a domain if the check to <postmaster@domain> fails.
3663 SC/01 Eximstats: added -xls and the ability to specify output files
3664 (patch written by Frank Heydlauf).
3666 SC/02 Eximstats: use FileHandles for outputting results.
3668 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3670 SC/04 Eximstats: fixed display of large numbers with -nvr option
3672 SC/05 Eximstats: fixed merging of reports with empty tables.
3674 SC/06 Eximstats: added the -include_original_destination flag
3676 SC/07 Eximstats: removed tabs and trailing whitespace.
3678 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3680 TK/06 MBOX spool code: Add real "From " MBOX separator line
3681 so the .eml file is really in mbox format (even though
3682 most programs do not really care). Patch from Alex Miller.
3684 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3685 The latter is generated from $received_to and is only set if the
3686 message has one envelope recipient. SA can use these headers,
3687 obviously out-of-the-box. Patch from Alex Miller.
3689 PH/08 The ${def test on a variable was returning false if the variable's
3690 value was "0", contrary to what the specification has always said!
3691 The result should be true unless the variable is empty.
3693 PH/09 The syntax error of a character other than { following "${if
3694 def:variable_name" (after optional whitespace) was not being diagnosed.
3695 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3696 accidental colon was present, for example, could give incorrect results.
3698 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3699 result is used (not including appendfile, where other changes are about
3702 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3703 This involved changing a lot of size variables from int to off_t. It
3704 should work with maildirs and everything.
3706 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3707 spamd dying while we are connected to it.
3709 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3712 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3713 function for BDB 4.3.
3715 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3717 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3718 the sources for PCRE have been re-arranged and more files are now
3721 PH/15 The code I had for printing potentially long long variables in PH/11
3722 above was not the best (it lost precision). The length of off_t variables
3723 is now inspected at build time, and an appropriate printing format (%ld
3724 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3725 to be "long long int" or "long int". This is needed for the internal
3726 formatting function string_vformat().
3728 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3729 the configuration file to be ":syslog", then the script "guesses" where
3730 the logs files are, rather than using the compiled in default. In our
3731 case the guess is not the same as the compiled default, so the script
3732 suddenly stopped working when I started to use syslog. The patch checks
3733 to see if log_file_path is "". If so, it attempts to read it from exim
3734 with no configuration file to get the compiled in version, before it
3735 falls back to the previous guessing code."
3737 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3738 implementing BATV in an Exim configuration. See NewStuff for the gory
3741 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3742 Makefile that are specific to HP-UX.
3744 PH/18 If the "use_postmaster" option was set for a recipient callout together
3745 with the "random" option, the postmaster address was used as the MAIL
3746 FROM address for the random test, but not for the subsequent recipient
3747 test. It is now used for both.
3749 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3750 patch removes a few documentation additions to RFC 3028, because the
3751 latest draft now contains them. It adds the new en;ascii-case comparator
3752 and a new error check for 8bit text in MIME parts. Comparator and
3753 require names are now matched exactly. I enabled the subaddress
3754 extension, but it is not well tested yet (read: it works for me)."
3756 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3757 rework some of the code of TK/09 above to avoid the hardwired use of
3758 "%lld" and "long long". Replaced the call to snprintf() with a call to
3761 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3762 records point to non-existent hosts", "retry timeout exceeded", and
3763 "retry time not reached for any host after a long failure period".
3765 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3766 experimental DomainKeys support:
3768 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3769 (2) On an error such as an illegally used "control", the wrong name for
3770 the control was given.
3772 These problems did NOT occur unless DomainKeys support was compiled.
3774 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3776 PH/24 Added ${if match_ip condition.
3778 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3779 databases so that it will be absolutely obvious if a crash occurs in the
3780 DB library. This is a regular occurrence (often caused by mis-matched
3783 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3784 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3785 picked up on a user's system that detects such things. There doesn't seem
3786 to be a gcc warning option for this - only an attribute that has to be
3787 put on the function's prototype. It seems that in Fedora Core 4 they have
3788 set this on a number of new functions. No doubt there will be more in due
3791 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3792 specify a transport. However, if an address that was verified by such a
3793 router was the subject of a callout, Exim crashed because it tried to
3794 read the rcpt_include_affixes from the non-existent transport. Now it
3795 just assumes that the setting of that option is false. This bug was
3796 introduced by 4.51/PH/31.
3798 PH/28 Changed -d+all to exclude +memory, because that information is very
3799 rarely of interest, but it makes the output a lot bigger. People tend to
3800 do -d+all out of habit.
3802 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3803 code in os-type was giving problems when libc.so lives in lib64, like on
3806 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3807 aren't the modern standard, and it seems that some systems' include files
3808 don't always have them. Exim was already checking for some of the newer
3809 ones like T_AAAA, and defining it itself. I've added checks for all the
3810 record types that Exim uses.
3812 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3813 not automatically generating a new one, as it is supposed to. This
3814 prevented TLS from working. If the file did exist, but contained invalid
3815 data, a new version was generated, as expected. It was only the case of a
3816 non-existent file that was broken.
3818 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3819 with a change in libdomainkeys > 0.64.
3821 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3822 from DNS. If the selector record carries the flag, it now has
3823 precedence over the domain-wide flag.
3825 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3827 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3828 the use of a port name that isn't defined in /etc/services) occurred, the
3829 message was deferred as in a normal delivery, and thus remained on the
3830 spool, instead of being failed because of the mua_wrapper setting. This
3831 is now fixed, and I tidied up some of the mua_wrapper messages at the
3834 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3835 the messages in a hash of arrays rather than using individual hashes.
3836 This is a bit cleaner and results in dramatic memory savings, albeit
3837 at a slight CPU cost.
3839 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3840 as requested by Marc Sherman.
3842 SC/10 Eximstats: added histograms for user specified patterns as requested
3845 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3847 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3848 fopen() in the content-scanning modules that did not already have it.
3854 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3855 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3857 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3859 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3861 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3862 to test Sieve filters that use "vacation".
3864 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3865 that changes the way the GnuTLS parameters are stored in the cache file.
3866 The new format can be generated externally. For backward compatibility,
3867 if the data in the cache doesn't make sense, Exim assumes it has read an
3868 old-format file, and it generates new data and writes a new file. This
3869 means that you can't go back to an older release without removing the
3872 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3873 work if there are any delivery delays because "one_time" forces the
3874 parent to be marked "delivered", so its unseen clone is never tried
3875 again. For this reason, Exim now forbids the simultaneous setting of
3878 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3879 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3880 entry if you want to know the details. The fix, however, neglected to
3881 consider the case when local delivery batching is involved. The test for
3882 "previously delivered" was not happening when checking to see if an
3883 address could be batched with a previous (undelivered) one; under
3884 certain circumstances this could lead to multiple deliveries to the same
3887 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3888 in its include files, and this causes problems building Exim.
3890 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3891 header_syntax) but Exim was just ignoring anything given after a slash.
3892 In particular, this caused confusion with an attempt to use "verify =
3893 reverse_host_lookup/defer_ok". An error is now given when options are
3894 supplied for verify items that do not have them. (Maybe reverse_host_
3895 lookup should have a defer_ok option, but that's a different point.)
3897 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3898 defined by RFC 821) to 2048, because there were problems with some AUTH
3899 commands, and RFC 1869 says the size should be increased for extended
3900 SMTP commands that take arguments.
3902 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3905 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3906 "unknown" error; now it says that the functionality isn't in the binary.
3908 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3909 an address' error message when a string expansion fails (syntax or
3910 whatever). Otherwise the password may appear in the log. Following change
3911 PH/42 below, there is no longer a chance of it appearing in a bounce
3914 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3916 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3917 of its addresses was ever tried. (Bugzilla bug #2.)
3919 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3920 the result incorrectly in the debug output. (It correctly added a newline
3921 to what was transported.)
3923 TF/01 Added $received_time.
3925 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3926 commented out examples of how to interface to a virus scanner and to
3927 SpamAssassin. Also added commented examples of av_scanner and
3928 spamd_address settings.
3930 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3931 and controls are allowed in which ACLs. There were a couple of minor
3932 errors. Some of the entries in the conditions table (which is a table of
3933 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3934 negation of where the condition IS allowed.
3936 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3938 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3939 header file does not have a version number, so I've had to invent a new
3940 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3941 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3942 radiusclient), but it was contributed by a Radius user.
3944 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3945 files or directories, for OpenSSL.
3947 PH/19 When an Exim process that is running as root has to create an Exim log
3948 file, it does so in a subprocess that runs as exim:exim so as to get the
3949 ownership right at creation (otherwise, other Exim processes might see
3950 the file with the wrong ownership). There was no test for failure of this
3951 fork() call, which would lead to the process getting stuck as it waited
3952 for a non-existent subprocess. Forks do occasionally fail when resources
3953 run out. I reviewed all the other calls to fork(); they all seem to check
3956 PH/20 When checking for unexpected SMTP input at connect time (before writing
3957 the banner), Exim was not dealing correctly with a non-positive return
3958 from the read() function. If the client had disconnected by this time,
3959 the result was a log entry for a synchronization error with an empty
3960 string after "input=" when read() returned zero. If read() returned -1
3961 (an event I could not check), uninitialized data bytes were printed.
3962 There were reports of junk text (parts of files, etc) appearing after
3965 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3967 PH/22 Added support for macro redefinition, and (re)definition in between
3968 driver and ACL definitions.
3970 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3971 forgetting to use the resulting value; it was using the unexpanded value.
3973 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3974 hadn't been configured. The fix is from Juergen Kreileder, who
3975 understands it better than I do:
3977 "Here's what I see happening with three configured cyrus_sasl
3978 authenticators configured (plain, login, cram-md5):
3980 On startup auth_cyrus_sasl_init() gets called for each of these.
3981 This means three calls to sasl_listmech() without a specified mech_list.
3982 => SASL tests which mechs of all available mechs actually work
3983 => three warnings about OTP not working
3984 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3986 With the patch, sasl_listmech() also gets called three times. But now
3987 SASL's mech_list option is set to the server_mech specified in the the
3988 authenticator. Or in other words, the answer from sasl_listmech()
3989 gets limited to just the mech you're testing for (which is different
3991 => the return list contains just 'plain' or 'login', 'cram-md5' or
3992 nothing depending on the value of ob->server_mech.
3994 I've just tested the patch: Authentication still works fine,
3995 unavailable mechs specified in the exim configuration are still
3996 caught, and the auth.log warnings about OTP are gone."
3998 PH/25 When debugging is enabled, the contents of the command line are added
3999 to the debugging output, even when log_selector=+arguments is not
4002 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4003 answer is "GNU", and only if the return is "GNU/something" is the answer
4006 PH/27 $acl_verify_message is now set immediately after the failure of a
4007 verification in an ACL, and so is available in subsequent modifiers. In
4008 particular, the message can be preserved by coding like this:
4010 warn !verify = sender
4011 set acl_m0 = $acl_verify_message
4013 Previously, $acl_verify_message was set only while expanding "message"
4014 and "log_message" when a very denied access.
4016 PH/28 Modified OS/os.c-Linux with
4018 -#ifndef OS_LOAD_AVERAGE
4019 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4021 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4022 nomenclature these days.)
4024 PH/29 Installed patch from the Sieve maintainer that adds the options
4025 sieve_useraddress and sieve_subaddress to the redirect router.
4027 PH/30 In these circumstances:
4028 . Two addresses routed to the same list of hosts;
4029 . First host does not offer TLS;
4030 . First host accepts first address;
4031 . First host gives temporary error to second address;
4032 . Second host offers TLS and a TLS session is established;
4033 . Second host accepts second address.
4034 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4035 and peerdn, if requested) that were in fact used only for the second
4038 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4039 attention to any local part prefix or suffix that was matched by the
4040 router that accepted the address. It now behaves in the same way as it
4041 does for delivery: the affixes are removed from the local part unless
4042 rcpt_include_affixes is set on the transport.
4044 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4045 timeout during the DATA phase of an incoming message.
4047 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4048 applied a patch sanctioned by the Sieve maintainer.
4050 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4051 the uid or gid is negative. A case of a negative gid caused this to be
4052 noticed. The fix allows for either to be negative.
4054 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4055 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4058 PH/36 The change PH/12 above was broken. Fixed it.
4060 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4061 the grounds that routing the same address twice would always produce the
4062 same answer. This might have been true once, but it is certainly no
4063 longer true now. Routing a child address may depend on the previous
4064 routing that produced that child. Some complicated redirection strategies
4065 went wrong when messages had multiple recipients, and made Exim's
4066 behaviour dependent on the order in which the addresses were given.
4068 I have moved the duplicate checking until after the routing is complete.
4069 Exim scans the addresses that are assigned to local and remote
4070 transports, and removes any duplicates. This means that more work will be
4071 done, as duplicates will always all be routed, but duplicates are
4072 presumably rare, so I don't expect this is of any significance.
4074 For deliveries to pipes, files, and autoreplies, the duplicate checking
4075 still happens during the routing process, since they are not going to be
4078 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4079 It corrects a timeout issue with spamd. This is Ian's comment: "The
4080 background is that sometimes spamd either never reads data from a
4081 connection it has accepted, or it never writes response data. The exiscan
4082 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4083 blindly assumes that writes won't block so it may never time out."
4085 PH/39 Allow G after quota size as well as K and M.
4087 PH/40 The value set for $authenticated_id in an authenticator may not contain
4088 binary zeroes or newlines because the value is written to log lines and
4089 to spool files. There was no check on this. Now the value is run through
4090 the string_printing() function so that such characters are converted to
4091 printable escape sequences.
4093 PH/41 $message_linecount is a new variable that contains the total number of
4094 lines in the message. Compare $body_linecount, which is the count for the
4097 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4098 bounce and delay warning messages, except in certain special cases, which
4101 (a) An SMTP error message from a remote host;
4102 (b) A message specified in a :fail: redirection;
4103 (c) A message specified in a "fail" command in a system filter;
4104 (d) A message specified in a FAIL return from the queryprogram router;
4105 (e) A message specified by the cannot_route_message router option.
4107 In these cases only, Exim does include the error details in bounce and
4108 warning messages. There are also a few cases where bland messages such
4109 as "unrouteable address" or "local delivery error" are given.
4111 PH/43 $value is now also set for the "else" part of a ${run expansion.
4113 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4114 being worked on, but at least Exim now implements the latest version to
4117 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4118 process to complete was treated as a delivery failure, a timeout while
4119 writing the message to the pipe was logged, but erroneously treated as a
4120 successful delivery. Such timeouts include transport filter timeouts. For
4121 consistency with the overall process timeout, these timeouts are now
4122 treated as errors, giving rise to delivery failures by default. However,
4123 there is now a new Boolean option for the pipe transport called
4124 timeout_defer, which, if set TRUE, converts the failures into defers for
4125 both kinds of timeout. A transport filter timeout is now identified in
4128 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4129 systems where "make" and "gmake" are different, calling "gmake" at top
4130 level broke things. I've arranged for the value of $(MAKE) to be passed
4131 from the Makefile to this script so that it can call the same version of
4135 A note about Exim versions 4.44 and 4.50
4136 ----------------------------------------
4138 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4139 changes of various kinds. As a consequence, a big documentation update was
4140 needed. This delayed the release for rather longer than seemed good, especially
4141 in the light of a couple of (minor) security issues. Therefore, the changes
4142 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4143 release. So 4.44 and 4.50 are in effect two different branches that both start
4146 I have left the 4.50 change log unchanged; it contains all the changes since
4147 4.43. The change log for 4.44 is below; many of its items are identical to
4148 those for 4.50. This seems to be the most sensible way to preserve the
4149 historical information.
4155 1. Minor wording change to the doc/README.SIEVE file.
4157 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4158 computation of the current number of files was incorrect.
4160 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4161 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4164 4. Give more explanation in the error message when the command for a transport
4165 filter fails to execute.
4167 5. There are several places where Exim runs a non-Exim command in a
4168 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4169 was being done only for the command run by the queryprogram router. It is
4170 now done for all such subprocesses. The other cases are: ${run, transport
4171 filters, and the commands run by the lmtp and pipe transports.
4173 6. Added CONFIGURE_GROUP build-time option.
4175 7. Some older OS have a limit of 256 on the maximum number of file
4176 descriptors. Exim was using setrlimit() to set 1000 as a large value
4177 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4178 systems. I've change it so that if it can't get 1000, it tries for 256.
4180 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4181 was an oversight, and furthermore, ever since the addition of extra
4182 controls (e.g. 4.43/32), the checks on when to allow different forms of
4183 "control" were broken. There should now be diagnostics for all cases when a
4184 control that does not make sense is encountered.
4186 9. Added the /retain_sender option to "control=submission".
4188 10. $recipients is now available in the predata ACL (oversight).
4190 11. Tidy the search cache before the fork to do a delivery from a message
4191 received from the command line. Otherwise the child will trigger a lookup
4192 failure and thereby defer the delivery if it tries to use (for example) a
4193 cached ldap connection that the parent has called unbind on.
4195 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4196 of $address_data from the recipient verification was clobbered by the
4197 sender verification.
4199 13. The value of address_data from a sender verification is now available in
4200 $sender_address_data in subsequent conditions in the ACL statement.
4202 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4204 15. Added a new option "connect=<time>" to callout options, to set a different
4207 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4208 was its contents. (It was OK if the option was not defined at all.)
4210 17. A "Completed" log line is now written for messages that are removed from
4211 the spool by the -Mrm option.
4213 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4214 information about exactly what failed.
4216 19. Added -dd to debug only the daemon process.
4218 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4219 handles timeouts, both on the server side and network timeouts. Renamed the
4220 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4222 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4223 It is now set to "smtps".
4225 22. $host_address is now set to the target address during the checking of
4226 ignore_target_hosts.
4228 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4229 being passed; this would have caused $sender_host_name to have been used if
4230 matching the list had actually called for a host name (not very likely,
4231 since this list is usually IP addresses). A host name is now passed as
4234 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4235 code that specifies a non-restarting handler (typically sigaction() in
4236 modern systems) in an attempt to fix a rare and obscure crash bug.
4238 25. Narrowed the window for a race in the daemon that could cause it to ignore
4239 SIGCHLD signals. This is not a major problem, because they are used only to
4240 wake it up if nothing else does.
4242 26. A malformed maildirsize file could cause Exim to calculate negative values
4243 for the mailbox size or file count. Odd effects could occur as a result.
4244 The maildirsize information is now recalculated if the size or filecount
4247 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4248 support for a long time. Removed HAVE_SYS_VFS_H.
4250 28. Installed the latest version of exipick from John Jetmore.
4252 29. In an address list, if the pattern was not a regular expression, an empty
4253 subject address (from a bounce message) matched only if the pattern was an
4254 empty string. Non-empty patterns were not even tested. This was the wrong
4255 because it is perfectly reasonable to use an empty address as part of a
4256 database query. An empty address is now tested by patterns that are
4257 lookups. However, all the other forms of pattern expect the subject to
4258 contain a local part and a domain, and therefore, for them, an empty
4259 address still always fails if the pattern is not itself empty.
4261 30. Exim went into a mad DNS loop when attempting to do a callout where the
4262 host was specified on an smtp transport, and looking it up yielded more
4263 than one IP address.
4265 31. Re-factored the code for checking spool and log partition space into a
4266 function that finds that data and another that does the check. The former
4267 is then used to implement four new variables: $spool_space, $log_space,
4268 $spool_inodes, and $log_inodes.
4270 32. The RFC2047 encoding function was originally intended for short strings
4271 such as real names; it was not keeping to the 75-character limit for
4272 encoded words that the RFC imposes. It now respects the limit, and
4273 generates multiple encoded words if necessary. To be on the safe side, I
4274 have increased the buffer size for the ${rfc2047: expansion operator from
4277 33. It is now permitted to omit both strings after an "if" condition; if the
4278 condition is true, the result is "true". As before, when the second string
4279 is omitted, a false condition yields an empty string. This makes it less
4280 cumbersome to write custom ACL and router conditions.
4282 34. Failure to deliver a bounce message always caused it to be frozen, even if
4283 there was an errors_to setting on the router. The errors_to setting is now
4286 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4287 canonical form (fully expanded) before being placed in
4288 $sender_host_address.
4290 36. The table in the code that translates DNS record types into text (T_A to
4291 "A" for instance) was missing entries for NS and CNAME. It is just possible
4292 that this could have caused confusion if both these types were looked up
4293 for the same domain, because the text type is used as part of Exim's
4294 per-process caching. But the chance of anyone hitting this buglet seems
4297 37. The dnsdb lookup has been extended in a number of ways.
4299 (1) There is a new type, "zns", which walks up the domain tree until it
4300 finds some nameserver records. It should be used with care.
4302 (2) There is a new type, "mxh", which is like "mx" except that it returns
4303 just the host names, not the priorities.
4305 (3) It is now possible to give a list of domains (or IP addresses) to be
4306 looked up. The behaviour when one of the lookups defers can be
4307 controlled by a keyword.
4309 (4) It is now possible to specify the separator character for use when
4310 multiple records are returned.
4312 38. The dnslists ACL condition has been extended: it is now possible to supply
4313 a list of IP addresses and/or domains to be looked up in a particular DNS
4316 39. Added log_selector=+queue_time_overall.
4318 40. When running the queue in the test harness, wait just a tad after forking a
4319 delivery process, to get repeatability of debugging output.
4321 41. Include certificate and key file names in error message when GnuTLS fails
4322 to set them up, because the GnuTLS error message doesn't include the name
4323 of the failing file when there is a problem reading it.
4325 42. Allow both -bf and -bF in the same test run.
4327 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4329 44. The "Exiscan patch" is now merged into the mainline Exim source.
4331 45. Sometimes the final signoff response after QUIT could fail to get
4332 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4333 < 0 before doing a fflush(). This bug looks as though it goes back to the
4334 introduction of TLS in release 3.20, but "sometimes" must have been rare
4335 because the tests only now provoked it.
4337 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4338 (this can affect the format of dates).
4340 47. exim_tidydb, when checking for the continued existence of a message for
4341 which it has found a message-specific retry record, was not finding
4342 messages that were in split spool directories. Consequently, it was
4343 deleting retry records that should have stayed in existence.
4345 48. Steve fixed some bugs in eximstats.
4347 49. The SPA authentication driver was not abandoning authentication and moving
4348 on to the next authenticator when an expansion was forced to fail,
4349 contradicting the general specification for all authenticators. Instead it
4350 was generating a temporary error. It now behaves as specified.
4352 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4353 (the order specifies the preference for clients). The order is now AES256,
4354 AES128, 3DES, ARCFOUR128.
4356 51. Small patch to Sieve code - explicitly set From: when generating an
4359 52. Exim crashed if a remote delivery caused a very long error message to be
4360 recorded - for instance if somebody sent an entire SpamAssassin report back
4361 as a large number of 550 error lines. This bug was coincidentally fixed by
4362 increasing the size of one of Exim's internal buffers (big_buffer) that
4363 happened as part of the Exiscan merge. However, to be on the safe side, I
4364 have made the code more robust (and fixed the comments that describe what
4367 53. Now that there can be additional text after "Completed" in log lines (if
4368 the queue_time_overall log selector is set), a one-byte patch to exigrep
4369 was needed to allow it to recognize "Completed" as not the last thing in
4372 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4373 patch that reportedly fixes this has been added. I am not expert enough to
4374 create a test for it. This is what the patch creator wrote:
4376 "I found a little strange behaviour of ldap code when working with
4377 Windows 2003 AD Domain, where users was placed in more than one
4378 Organization Units. When I tried to give exim partial DN, the exit code
4379 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4380 But simultaneously result of request was absolutely normal ldap result,
4381 so I produce this patch..."
4383 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4384 REFERENCE, so I have modified the code to exclude the patch when that macro
4387 55. Some experimental protocols are using DNS PTR records for new purposes. The
4388 keys for these records are domain names, not reversed IP addresses. The
4389 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4390 leaves it alone. Component reversal etc. now happens only for IP addresses.
4393 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4395 57. Double the size of the debug message buffer (to 2048) so that more of very
4396 long debug lines gets shown.
4398 58. The exicyclog utility now does better if the number of log files to keep
4399 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4401 59. Two changes related to the smtp_active_hostname option:
4403 (1) $smtp_active_hostname is now available as a variable.
4404 (2) The default for smtp_banner uses $smtp_active_hostname instead
4405 of $primary_hostname.
4407 60. The host_aton() function is supposed to be passed a string that is known
4408 to be a valid IP address. However, in the case of IPv6 addresses, it was
4409 not checking this. This is a hostage to fortune. Exim now panics and dies
4410 if the condition is not met. A case was found where this could be provoked
4411 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4412 components; fortuitously, this particular loophole had already been fixed
4413 by change 4.50/55 above.
4415 If there are any other similar loopholes, the new check in host_aton()
4416 itself should stop them being exploited. The report I received stated that
4417 data on the command line could provoke the exploit when Exim was running as
4418 exim, but did not say which command line option was involved. All I could
4419 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4420 running as the user.
4423 61. There was a buffer overflow vulnerability in the SPA authentication code
4424 (which came originally from the Samba project). I have added a test to the
4425 spa_base64_to_bits() function which I hope fixes it.
4428 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4429 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4431 63. The daemon start-up calls getloadavg() while still root for those OS that
4432 need the first call to be done as root, but it missed one case: when
4433 deliver_queue_load_max is set with deliver_drop_privilege. This is
4434 necessary for the benefit of the queue runner, because there is no re-exec
4435 when deliver_drop_privilege is set.
4437 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4438 This has been fixed.
4440 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4441 was in use, was not putting the data itself into the right store pool;
4442 consequently, it could be overwritten for a subsequent message in the same
4443 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4446 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4448 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4449 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4450 the function were treating the return as a boolean value, which happened to
4451 work because 0=false and not-0=true, but is not correct code.
4453 68. The host_aton() function was not handling scoped IPv6 addresses (those
4454 with, for example, "%eth0" on the end) correctly.
4456 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4457 negated items (that is, ~something) in unsigned ints. Some compilers
4458 apparently mutter when there is no cast.
4460 70. If an address verification called from an ACL failed, and did not produce a
4461 user-specific message (i.e. there was only a "system" message), nothing was
4462 put in $acl_verify_message. In this situation, it now puts the system
4465 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4466 session; change 4.31/43 added the unwanted input to the log line - except
4467 that it did not do this in the start of session case. It now does.
4469 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4470 This is wrong and can cause the other end to generate a synchronization
4471 error if it is another Exim or anything else that does the synchronization
4472 check. A QUIT command is no longer sent after a timeout.
4474 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4475 during host lookups.
4477 74. The defer_ok option of callout verification was not working if it was used
4478 when verifying addresses in header lines, that is, for this case:
4480 verify = header_sender/callout=defer_ok
4482 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4483 those file descriptors could be used for SMTP connections. If anything
4484 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4485 could be sent to the SMTP client, causing chaos. The daemon now opens
4486 stdin, stdout, and stderr to /dev/null when it puts itself into the
4489 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4490 log by default. The user can override this with suitable Perl magic.
4492 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4493 the log message when discard triggers, was not working for the DATA ACL or
4494 for the non-SMTP ACL.
4496 78. Error message wording change in sieve.c.
4498 79. If smtp_accept_max_per_host was set, the number of connections could be
4499 restricted to fewer than expected, because the daemon was trying to set up
4500 a new connection before checking whether the processes handling previous
4501 connections had finished. The check for completed processes is now done
4502 earlier. On busy systems, this bug wouldn't be noticed because something
4503 else would have woken the daemon, and it would have reaped the completed
4506 80. If a message was submitted locally by a user whose login name contained one
4507 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4508 It caused a spool format error. I have fixed the spool reading code. A
4509 related problem was that the "from" clause in the Received: line became
4510 illegal because of the space(s). It is now covered by ${quote_local_part.
4512 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4515 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4517 83. Patch from Sieve maintainer to fix unterminated string problem in
4518 "vacation" handling.
4520 84. Some minor changes to the Linux configuration files to help with other
4521 OS variants using glibc.
4523 85. One more patch for Sieve to update vacation handling to latest spec.
4526 ----------------------------------------------------
4527 See the note above about the 4.44 and 4.50 releases.
4528 ----------------------------------------------------
4534 1. Change 4.43/35 introduced a bug that caused file counts to be
4535 incorrectly computed when quota_filecount was set in an appendfile
4538 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4539 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4542 3. Give more explanation in the error message when the command for a transport
4543 filter fails to execute.
4545 4. There are several places where Exim runs a non-Exim command in a
4546 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4547 was being done only for the command run by the queryprogram router. It is
4548 now done for all such subprocesses. The other cases are: ${run, transport
4549 filters, and the commands run by the lmtp and pipe transports.
4551 5. Some older OS have a limit of 256 on the maximum number of file
4552 descriptors. Exim was using setrlimit() to set 1000 as a large value
4553 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4554 systems. I've change it so that if it can't get 1000, it tries for 256.
4556 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4557 was an oversight, and furthermore, ever since the addition of extra
4558 controls (e.g. 4.43/32), the checks on when to allow different forms of
4559 "control" were broken. There should now be diagnostics for all cases when a
4560 control that does not make sense is encountered.
4562 7. $recipients is now available in the predata ACL (oversight).
4564 8. Tidy the search cache before the fork to do a delivery from a message
4565 received from the command line. Otherwise the child will trigger a lookup
4566 failure and thereby defer the delivery if it tries to use (for example) a
4567 cached ldap connection that the parent has called unbind on.
4569 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4570 of $address_data from the recipient verification was clobbered by the
4571 sender verification.
4573 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4574 was its contents. (It was OK if the option was not defined at all.)
4576 11. A "Completed" log line is now written for messages that are removed from
4577 the spool by the -Mrm option.
4579 12. $host_address is now set to the target address during the checking of
4580 ignore_target_hosts.
4582 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4583 being passed; this would have caused $sender_host_name to have been used if
4584 matching the list had actually called for a host name (not very likely,
4585 since this list is usually IP addresses). A host name is now passed as
4588 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4589 code that specifies a non-restarting handler (typically sigaction() in
4590 modern systems) in an attempt to fix a rare and obscure crash bug.
4592 15. Narrowed the window for a race in the daemon that could cause it to ignore
4593 SIGCHLD signals. This is not a major problem, because they are used only to
4594 wake it up if nothing else does.
4596 16. A malformed maildirsize file could cause Exim to calculate negative values
4597 for the mailbox size or file count. Odd effects could occur as a result.
4598 The maildirsize information is now recalculated if the size or filecount
4601 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4602 support for a long time. Removed HAVE_SYS_VFS_H.
4604 18. Updated exipick to current release from John Jetmore.
4606 19. Allow an empty sender to be matched against a lookup in an address list.
4607 Previously the only cases considered were a regular expression, or an
4610 20. Exim went into a mad DNS lookup loop when doing a callout where the
4611 host was specified on the transport, if the DNS lookup yielded more than
4614 21. The RFC2047 encoding function was originally intended for short strings
4615 such as real names; it was not keeping to the 75-character limit for
4616 encoded words that the RFC imposes. It now respects the limit, and
4617 generates multiple encoded words if necessary. To be on the safe side, I
4618 have increased the buffer size for the ${rfc2047: expansion operator from
4621 22. Failure to deliver a bounce message always caused it to be frozen, even if
4622 there was an errors_to setting on the router. The errors_to setting is now
4625 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4626 canonical form (fully expanded) before being placed in
4627 $sender_host_address.
4629 24. Updated eximstats to version 1.33
4631 25. Include certificate and key file names in error message when GnuTLS fails
4632 to set them up, because the GnuTLS error message doesn't include the name
4633 of the failing file when there is a problem reading it.
4635 26. Expand error message when OpenSSL has problems setting up cert/key files.
4638 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4639 (this can affect the format of dates).
4641 28. exim_tidydb, when checking for the continued existence of a message for
4642 which it has found a message-specific retry record, was not finding
4643 messages that were in split spool directories. Consequently, it was
4644 deleting retry records that should have stayed in existence.
4646 29. eximstats updated to version 1.35
4647 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4648 1.35 - bugfix such that pie charts by volume are generated correctly
4650 30. The SPA authentication driver was not abandoning authentication and moving
4651 on to the next authenticator when an expansion was forced to fail,
4652 contradicting the general specification for all authenticators. Instead it
4653 was generating a temporary error. It now behaves as specified.
4655 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4656 (the order specifies the preference for clients). The order is now AES256,
4657 AES128, 3DES, ARCFOUR128.
4659 31. Small patch to Sieve code - explicitly set From: when generating an
4662 32. Exim crashed if a remote delivery caused a very long error message to be
4663 recorded - for instance if somebody sent an entire SpamAssassin report back
4664 as a large number of 550 error lines. This bug was coincidentally fixed by
4665 increasing the size of one of Exim's internal buffers (big_buffer) that
4666 happened as part of the Exiscan merge. However, to be on the safe side, I
4667 have made the code more robust (and fixed the comments that describe what
4670 33. Some experimental protocols are using DNS PTR records for new purposes. The
4671 keys for these records are domain names, not reversed IP addresses. The
4672 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4673 leaves it alone. Component reversal etc. now happens only for IP addresses.
4676 34. The host_aton() function is supposed to be passed a string that is known
4677 to be a valid IP address. However, in the case of IPv6 addresses, it was
4678 not checking this. This is a hostage to fortune. Exim now panics and dies
4679 if the condition is not met. A case was found where this could be provoked
4680 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4681 components; fortuitously, this particular loophole had already been fixed
4682 by change 4.50/55 or 4.44/33 above.
4684 If there are any other similar loopholes, the new check in host_aton()
4685 itself should stop them being exploited. The report I received stated that
4686 data on the command line could provoke the exploit when Exim was running as
4687 exim, but did not say which command line option was involved. All I could
4688 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4689 running as the user.
4692 35. There was a buffer overflow vulnerability in the SPA authentication code
4693 (which came originally from the Samba project). I have added a test to the
4694 spa_base64_to_bits() function which I hope fixes it.
4697 36. The daemon start-up calls getloadavg() while still root for those OS that
4698 need the first call to be done as root, but it missed one case: when
4699 deliver_queue_load_max is set with deliver_drop_privilege. This is
4700 necessary for the benefit of the queue runner, because there is no re-exec
4701 when deliver_drop_privilege is set.
4703 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4704 was in use, was not putting the data itself into the right store pool;
4705 consequently, it could be overwritten for a subsequent message in the same
4706 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4709 38. Sometimes the final signoff response after QUIT could fail to get
4710 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4711 < 0 before doing a fflush(). This bug looks as though it goes back to the
4712 introduction of TLS in release 3.20, but "sometimes" must have been rare
4713 because the tests only now provoked it.
4719 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4720 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4721 Now it returns an integer. A number of calls were still expecting a T/F
4722 return. Fortuitously, in all cases, the tests worked in OK situations,
4723 which is the norm. However, things would have gone wrong on any write
4724 failures on the smtp file descriptor. This function is used when sending
4725 messages over SMTP and also when doing verify callouts.
4727 2. When Exim is called to do synchronous delivery of a locally submitted
4728 message (the -odf or -odi options), it no longer closes stderr before doing
4731 3. Implemented the mua_wrapper option.
4733 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4735 5. Implemented the functions header_remove(), header_testname(),
4736 header_add_at_position(), and receive_remove_recipient(), and exported them
4739 6. If an ACL "warn" statement specified the addition of headers, Exim already
4740 inserted X-ACL-Warn: at the start if there was no header name. However, it
4741 was not making this test for the second and subsequent header lines if
4742 there were newlines in the string. This meant that an invalid header could
4743 be inserted if Exim was badly configured.
4745 7. Allow an ACL "warn" statement to add header lines at the start or after all
4746 the Received: headers, as well as at the end.
4748 8. Added the rcpt_4xx retry error code.
4750 9. Added postmaster_mailfrom=xxx to callout verification option.
4752 10. Added mailfrom=xxxx to the callout verification option, for verify=
4755 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4756 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4758 12. Inserted some casts to stop certain compilers warning when using pointer
4759 differences as field lengths or precisions in printf-type calls (mostly
4760 affecting debugging statements).
4762 13. Added optional readline() support for -be (dynamically loaded).
4764 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4765 same clock tick as a message's arrival, so that its received time was the
4766 same as the "first fail" time on the retry record, and that message
4767 remained on the queue past the ultimate address timeout, every queue runner
4768 would try a delivery (because it was past the ultimate address timeout) but
4769 after another failure, the ultimate address timeout, which should have then
4770 bounced the address, did not kick in. This was a "< instead of <=" error;
4771 in most cases the first failure would have been in the next clock tick
4772 after the received time, and all would be well.
4774 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4775 being recognized when the domain list was tested by the match_domain
4776 condition in an expansion string.
4778 16. Added the ${str2b64: operator.
4780 17. Exim was always calling setrlimit() to set a large limit for the number of
4781 processes, without checking whether the existing limit was already
4782 adequate. (It did check for the limit on file descriptors.) Furthermore,
4783 errors from getrlimit() and setrlimit() were being ignored. Now they are
4784 logged to the main and panic logs, but Exim does carry on, to try to do its
4785 job under whatever limits there are.
4787 18. Imported PCRE 5.0.
4789 19. Trivial typo in log message " temporarily refused connection" (the leading
4792 20. If the log selector return_path_on_delivery was set and an address was
4793 redirected to /dev/null, the delivery process crashed because it assumed
4794 that a return path would always be set for a "successful" delivery. In this
4795 case, the whole delivery is bypassed as an optimization, and therefore no
4798 21. Internal re-arrangement: the function for sending a challenge and reading
4799 a response while authentication was assuming a zero-terminated challenge
4800 string. It's now changed to take a pointer and a length, to allow for
4801 binary data in such strings.
4803 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4805 23. Exim was not respecting finduser_retries when seeking the login of the
4806 uid under which it was called; it was always trying 10 times. (The default
4807 setting of finduser_retries is zero.) Also, it was sleeping after the final
4808 failure, which is pointless.
4810 24. Implemented tls_on_connect_ports.
4812 25. Implemented acl_smtp_predata.
4814 26. If the domain in control=submission is set empty, Exim assumes that the
4815 authenticated id is a complete email address when it generates From: or
4816 Sender: header lines.
4818 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4819 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4820 chown and chgrp in /bin and hostname in /usr/bin.
4822 28. Exim was keeping the "process log" file open after each use, just as it
4823 does for the main log. This opens the possibility of it remaining open for
4824 long periods when the USR1 signal hits a daemon. Occasional processlog
4825 errors were reported, that could have been caused by this. Anyway, it seems
4826 much more sensible not to leave this file open at all, so that is what now
4829 29. The long-running daemon process does not normally write to the log once it
4830 has entered its main loop, and it closes the log before doing so. This is
4831 so that log files can straightforwardly be renamed and moved. However,
4832 there are a couple of unusual error situations where the daemon does write
4833 log entries, and I had neglected to close the log afterwards.
4835 30. The text of an SMTP error response that was received during a remote
4836 delivery was being truncated at 512 bytes. This is too short for some of
4837 the long messages that one sometimes sees. I've increased the limit to
4840 31. It is now possible to make retry rules that apply only when a message has a
4841 specific sender, in particular, an empty sender.
4843 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4844 it possible to be selective about when SMTP synchronization is enforced.
4846 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4848 32. Implemented hosts_connection_nolog.
4850 33. Added an ACL for QUIT.
4852 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4855 35. Added mailbox_size and mailbox_filecount to appendfile.
4857 36. Added control = no_multiline_responses to ACLs.
4859 37. There was a bug in the logic of the code that waits for the clock to tick
4860 in the case where the clock went backwards by a substantial amount such
4861 that the microsecond fraction of "now" was more than the microsecond
4862 fraction of "then" (but the whole seconds number was less).
4864 38. Added support for the libradius Radius client library this is found on
4865 FreeBSD (previously only the radiusclient library was supported).
4871 1. When certain lookups returned multiple values in the form name=value, the
4872 quoting of the values was not always being done properly. Specifically:
4873 (a) If the value started with a double quote, but contained no whitespace,
4875 (b) If the value contained whitespace other than a space character (i.e.
4876 tabs or newlines or carriage returns) it was not quoted.
4877 This fix has been applied to the mysql and pgsql lookups by writing a
4878 separate quoting function and calling it from the lookup code. The fix
4879 should probably also be applied to nisplus, ibase and oracle lookups, but
4880 since I cannot test any of those, I have not disturbed their existing code.
4882 2. A hit in the callout cache for a specific address caused a log line with no
4883 reason for rejecting RCPT. Now it says "Previous (cached) callout
4884 verification failure".
4886 3. There was an off-by-one bug in the queryprogram router. An over-long
4887 return line was truncated at 256 instead of 255 characters, thereby
4888 overflowing its buffer with the terminating zero. As well as fixing this, I
4889 have increased the buffer size to 1024 (and made a note to document this).
4891 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4892 when Exim is waiting for an SMTP response from a remote server, Exim
4893 restarts its select() call on the socket, thereby resetting its timeout.
4894 This is not a problem when such interrupts are rare. Somebody set up a cron
4895 job to run exiwhat every 2 minutes, which is less than the normal select()
4896 timeout (5 or 10 minutes). This meant that the select() timeout never
4897 kicked in because it was always reset. I have fixed this by comparing the
4898 time when an interrupt arrives with the time at the start of the first call
4899 to select(). If more time than the timeout has elapsed, the interrupt is
4900 treated as a timeout.
4902 5. Some internal re-factoring in preparation for the addition of Sieve
4903 extensions (by MH). In particular, the "personal" test is moved to a
4904 separate function, and given an option for scanning Cc: and Bcc: (which is
4905 not set for Exim filters).
4907 6. When Exim created an email address using the login of the caller as the
4908 local part (e.g. when creating a From: or Sender: header line), it was not
4909 quoting the local part when it contained special characters such as @.
4911 7. Installed new OpenBSD configuration files.
4913 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4914 try to make them clearer.
4916 9. Callout options, other than the timeout value, were being ignored when
4917 verifying sender addresses in header lines. For example, when using
4919 verify = header_sender/callout=no_cache
4921 the cache was (incorrectly) being used.
4923 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4924 only the Cygwin environment.
4926 11. When return_path_on_delivery was set as a log selector, if different remote
4927 addresses in the same message used different return paths and parallel
4928 remote delivery occurred, the wrong values would sometimes be logged.
4929 (Whenever a remote delivery process finished, the return path value from
4930 the most recently started remote delivery process was logged.)
4932 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4933 lines when AUTH and/or TLS are in use. This is the "received protocol"
4934 field. Exim used to use "asmtp" for authenticated SMTP, without any
4935 indication (in the protocol name) for TLS use. Now it follows the RFC and
4936 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4937 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4938 names appear in log lines as well as in Received: header lines.
4940 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4941 extensions, and comparison tests, and to fix some bugs.
4943 14. Changes to the "personal" filter test:
4945 (1) The test was buggy in that it was just doing the equivalent of
4946 "contains" tests on header lines. For example, if a user's address was
4947 anne@some.where, the "personal" test would incorrectly be true for
4949 To: susanne@some.where
4951 This test is now done by extracting each address from the header in turn,
4952 and checking the entire address. Other tests that are part of "personal"
4953 are now done using regular expressions (for example, to check local parts
4954 of addresses in From: header lines).
4956 (2) The list of non-personal local parts in From: addresses has been
4957 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4958 taken from the Sieve specification recommendations.
4960 (3) If the message contains any header line starting with "List-" it is
4961 treated as non-personal.
4963 (4) The test for "circular" in the Subject: header line has been removed
4964 because it now seems ill-conceived.
4966 15. Minor typos in src/EDITME comments corrected.
4968 16. Installed latest exipick from John Jetmore.
4970 17. If headers_add on a router specified a text string that was too long for
4971 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4972 of string_sprintf() is now avoided.
4974 18. $message_body_size was not set (it was always zero) when running the DATA
4975 ACL and the local_scan() function.
4977 19. For the "mail" command in an Exim filter, no default was being set for
4978 the once_repeat time, causing a random time value to be used if "once" was
4979 specified. (If the value happened to be <= 0, no repeat happened.) The
4980 default is now 0s, meaning "never repeat". The "vacation" command was OK
4981 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4982 (I found it when inspecting the code).
4984 20. There is now an overall timeout for performing a callout verification. It
4985 defaults to 4 times the callout timeout, which applies to individual SMTP
4986 commands during the callout. The overall timeout applies when there is more
4987 than one host that can be tried. The timeout is checked before trying the
4988 next host. This prevents very long delays if there are a large number of
4989 hosts and all are timing out (e.g. when the network connections are timing
4990 out). The value of the overall timeout can be changed by specifying an
4991 additional sub-option for "callout", called "maxwait". For example:
4993 verify = sender/callout=5s,maxwait=20s
4995 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4996 to the end before writing, but this should make it even safer).
4998 22. Exim was forgetting that it had advertised PIPELINING for the second and
4999 subsequent messages on an SMTP connection. It was also not resetting its
5000 memory on STARTTLS and an internal HELO.
5002 23. When Exim logs an SMTP synchronization error within a session, it now
5003 records whether PIPELINING has been advertised or not.
5005 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5006 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5007 rather than long int.
5009 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5011 26. Added the never_mail option to autoreply.
5017 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5018 crash if the getsockname() call failed; this can happen if a connection is
5019 closed very soon after it is established. The problem was simply in the
5020 order in which certain operations were done, causing Exim to try to write
5021 to the SMTP stream before it had set up the file descriptor. The bug has
5022 been fixed by making things happen in the correct order.
5028 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5029 before the connection was closed, thus losing the rejection response.
5031 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5032 some early Solaris releases, but causes trouble in current releases where
5033 socklen_t is defined.
5035 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5038 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5041 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5042 that releasing the top of it at the end releases what was used for sub-
5043 expansions (unless the block got too big). However, discard this block if
5044 the first thing is a variable or header, so that we can use its block when
5045 it is dynamic (useful for very large $message_headers, for example).
5047 6. Lookups now cache *every* query, not just the most recent. A new, separate
5048 store pool is used for this. It can be recovered when all lookup caches are
5049 flushed. Lookups now release memory at the end of their result strings.
5050 This has involved some general refactoring of the lookup sources.
5052 7. Some code has been added to the store_xxx() functions to reduce the amount
5053 of flapping under certain conditions.
5055 8. log_incoming_interface used to affect only the <= reception log lines. Now
5056 it causes the local interface and port to be added to several more SMTP log
5057 lines, for example "SMTP connection from", and rejection lines.
5059 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5061 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5063 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5064 could be overwritten at the end of the current message (or the start of a
5065 new message if it was set in a HELO ACL). The value is now preserved for
5066 the duration of the SMTP connection.
5068 12. If a transport had a headers_rewrite setting, and a matching header line
5069 contained an unqualified address, that address was qualified, even if it
5070 did not match any rewriting rules. The underlying bug was that the values
5071 of the flags that permit the existence of unqualified sender and recipient
5072 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5073 non-local messages, and by -bnq for local messages) were not being
5074 preserved with the message after it was received.
5076 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5077 "next input=" as part of the text comprising the host identity instead of
5078 the correct text. The code was using the same buffer for two different
5079 strings. However, depending on which order the printing function evaluated
5080 its arguments, the bug did not always show up. Under Linux, for example, my
5081 test suite worked just fine.
5083 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5084 doesn't work with some older versions of Perl. It has been changed to "my",
5085 which in any case is probably the better facility to use.
5087 15. A really picky compiler found some instances of statements for creating
5088 error messages that either had too many or two few arguments for the format
5091 16. The size of the buffer for calls to the DNS resolver has been increased
5092 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5093 for addresses that have a lot of PTR records. This alleviates a problem; it
5094 does not fully solve it.
5096 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5097 buffer now truncates the list and logs the incident, which is the same
5098 action as happens when Exim is looking up a host name and its aliases.
5099 Previously in this situation something unpredictable would happen;
5100 sometimes it was "internal error: store_reset failed".
5102 18. If a server dropped the connection unexpectedly when an Exim client was
5103 using GnuTLS and trying to read a response, the client delivery process
5104 crashed while trying to generate an error log message.
5106 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5107 string, for example:
5109 warn message = H1: something\nH2: something
5111 the text was added as a single header line from Exim's point of view
5112 though it ended up OK in the delivered message. However, searching for the
5113 second and subsequent header lines using $h_h2: did not work. This has been
5114 fixed. Similarly, if a system filter added multiple headers in this way,
5115 the routers could not see them.
5117 20. Expanded the error message when iplsearch is called with an invalid key to
5118 suggest using net-iplsearch in a host list.
5120 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5121 ACLs are no longer actually imposed (and a message to that effect is
5124 22. If a "gecos" field in a passwd entry contained escaped characters, in
5125 particular, if it contained a \" sequence, Exim got it wrong when building
5126 a From: or a Sender: header from that name. A second bug also caused
5127 incorrect handling when an unquoted " was present following a character
5128 that needed quoting.
5130 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5131 was not being matched caselessly.
5133 24. Arranged for all hyphens in the exim.8 source to be escaped with
5136 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5137 properly. Recipient callout cache records were still being keyed to include
5138 the sender, even when use_sender was set false. This led to far more
5139 callouts that were necessary. The sender is no longer included in the key
5140 when use_sender is false.
5142 26. Added "control = submission" modifier to ACLs.
5144 27. Added the ${base62d: operator to decode base 62 numbers.
5146 28. dnsdb lookups can now access SRV records.
5148 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5149 the configuration file.
5151 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5152 (-v) mode. This makes the output for a verbose queue run more intelligible.
5154 31. Added a use_postmaster feature to recipient callouts.
5156 32. Added the $body_zerocount variable, containing the number of binary zero
5157 bytes in the message body.
5159 33. The time of last modification of the "new" subdirectory is now used as the
5160 "mailbox time last read" when there is a quota error for a maildir
5163 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5165 35. Added +ignore_unknown as a special item in host lists.
5167 36. Code for decoding IPv6 addresses in host lists is now included, even if
5168 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5169 address was recognized as an IP address, but was then not correctly decoded
5170 into binary, causing unexpected and incorrect effects when compared with
5177 1. Very minor rewording of debugging text in manualroute to say "list of
5178 hosts" instead of "hostlist".
5180 2. If verify=header_syntax was set, and a header line with an unqualified
5181 address (no domain) and a large number of spaces between the end of the
5182 name and the colon was received, the reception process suffered a buffer
5183 overflow, and (when I tested it) crashed. This was caused by some obsolete
5184 code that should have been removed. The fix is to remove it!
5186 3. When running in the test harness, delay a bit after writing a bounce
5187 message to get a bit more predictability in the log output.
5189 4. Added a call to search_tidyup() just before forking a reception process. In
5190 theory, someone could use a lookup in the expansion of smtp_accept_max_
5191 per_host which, without the tidyup, could leave open a database connection.
5193 5. Added the variables $recipient_data and $sender_data which get set from a
5194 lookup success in an ACL "recipients" or "senders" condition, or a router
5195 "senders" option, similar to $domain_data and $local_part_data.
5197 6. Moved the writing of debug_print from before to after the "senders" test
5200 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5201 problems for message scanning, either using a data ACL, or using
5202 local_scan() because the Received: header was not generated till after they
5203 were called (in order to set the time as the time of reception completion).
5204 I have revised the way this works. The header is now generated after the
5205 body is received, but before the ACL or local_scan() are called. After they
5206 are run, the timestamp in the header is updated.
5212 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5213 before starting a queue runner without re-exec. This happened only when
5214 deliver_drop_privilege was set or when the Exim user was set to root. The
5215 effect of the bug was that timeouts during subsequent deliveries caused
5216 crashes instead of being properly handled. The handler is now left at its
5217 default (and expected) setting.
5219 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5220 message, again when deliver_drop_privilege is set or Exim is run as root.
5221 The bug described in (1) was not present in this case, but the tidying up
5222 of the other signals was missing. I have made the two cases consistent.
5224 3. The ignore_target_hosts setting on a manualroute router was being ignored
5225 for hosts that were looked up using the /MX notation.
5227 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5230 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5231 operated on the sender address. After changing the $sender_address to <>
5232 for the sender address verify, Exim was re-instated it as the original
5233 (before rewriting) address, but remembering that it had rewritten it, so it
5234 wasn't rewriting it again. This bug also had the effect of breaking the
5235 sender address verification caching when the sender address was rewritten.
5237 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5238 This has been changed so that if the ip literal address matches
5239 ignore_target_hosts, the router declines.
5241 7. Added expansion conditions match_domain, match_address, and match_local_
5242 part (NOT match_host).
5244 8. The placeholder for the Received: header didn't have a length field set.
5246 9. Added code to Exim itself and to exim_lock to test for a specific race
5247 condition that could lead to file corruption when using MBX delivery. The
5248 issue is with the lockfile that is created in /tmp. If this file is removed
5249 after a process has opened it but before that process has acquired a lock,
5250 there is the potential for a second process to recreate the file and also
5251 acquire a lock. This could lead to two Exim processes writing to the file
5252 at the same time. The added code performs the same test as UW imapd; it
5253 checks after acquiring the lock that its file descriptor still refers to
5254 the same named file.
5256 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5257 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5260 11. Added the smtp_active_hostname option. If used, this will typically be made
5261 to depend on the incoming interface address. Because $interface_address is
5262 not set up until the daemon has forked a reception process, error responses
5263 that can happen earlier (such as "too many connections") no longer contain
5266 12. If an expansion in a condition on a "warn" statement fails because a lookup
5267 defers, the "warn" statement is abandoned, and the next ACL statement is
5268 processed. Previously this caused the whole ACL to be aborted.
5270 13. Added the iplsearch lookup type.
5272 14. Added ident_timeout as a log selector.
5274 15. Added tls_certificate_verified as a log selector.
5276 16. Added a global option tls_require_ciphers (compare the smtp transport
5277 option of the same name). This controls incoming TLS connections.
5279 17. I finally figured out how to make tls_require_ciphers do a similar thing
5280 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5281 before starting the TLS session.
5283 18. Tabs are now shown as \t in -bP output.
5285 19. If the log selector return_path_on_delivery was set, Exim crashed when
5286 bouncing a message because it had too many Received: header lines.
5288 20. If two routers both had headers_remove settings, and the first one included
5289 a superfluous trailing colon, the final name in the first list and the
5290 first name in the second list were incorrectly joined into one item (with a
5291 colon in the middle).
5297 1. Added -C and -D options to the exinext utility, mainly to make it easier
5298 to include in the automated testing, but these could be helpful when
5299 multiple configurations are in use.
5301 2. The exinext utility was not formatting the output nicely when there was
5302 an alternate port involved in the retry record key, nor when there was a
5303 message id as well (for retries that were specific to a specific message
5304 and a specific host). It was also confused by IPv6 addresses, because of
5305 the additional colons they contain. I have fixed the IPv4 problem, and
5306 patched it up to do a reasonable job for IPv6.
5308 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5309 delivery, the log line now contains "pipelined" if PIPELINING was used.
5311 4. An SMTP transport process used to panic and die if the bind() call to set
5312 an explicit outgoing interface failed. This has been changed; it is now
5313 treated in the same way as a connect() failure.
5315 5. A reference to $sender_host_name in the part of a conditional expansion
5316 that was being skipped was still causing a DNS lookup. This no longer
5319 6. The def: expansion condition was not recognizing references to header lines
5320 that used bh_ and bheader_.
5322 7. Added the _cache feature to named lists.
5324 8. The code for checking quota_filecount in the appendfile transport was
5325 allowing one more file than it should have been.
5327 9. For compatibility with Sendmail, the command line option
5335 and sets the incoming protocol and host name (for trusted callers). The
5336 host name and its colon can be omitted when only the protocol is to be set.
5337 Note the Exim already has two private options, -pd and -ps, that refer to
5338 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5339 "s", but I don't think that's a major issue.
5341 10. A number of refactoring changes to the code, none of which should affect
5344 (a) The number of logging options was getting close to filling up the
5345 32-bit word that was used as a bit map. I have split them into two classes:
5346 those that are passed in the argument to log_write(), and those that are
5347 only ever tested independently outside of that function. These are now in
5348 separate 32-bit words, so there is plenty of room for expansion again.
5349 There is no change in the user interface or the logging behaviour.
5351 (b) When building, for example, log lines, the code previously used a
5352 macro that called string_cat() twice, in order to add two strings. This is
5353 not really sufficiently general. Furthermore, there was one instance where
5354 it was actually wrong because one of the argument was used twice, and in
5355 one call a function was used. (As it happened, calling the function twice
5356 did not affect the overall behaviour.) The macro has been replaced by a
5357 function that can join an arbitrary number of extra strings onto a growing
5360 (c) The code for expansion conditions now uses a table and a binary chop
5361 instead of a serial search (which was left over from when there were very
5362 few conditions). Also, it now recognizes conditions like "pam" even when
5363 the relevant support is not compiled in: a suitably worded error message is
5364 given if an attempt is made to use such a condition.
5366 11. Added ${time_interval:xxxxx}.
5368 12. A bug was causing one of the ddress fields not to be passed back correctly
5369 from remote delivery subprocesses. The field in question was not being
5370 subsequently used, so this caused to problems in practice.
5372 13. Added new log selectors queue_time and deliver_time.
5374 14. Might have fixed a bug in maildirsizefile handling that threw up
5375 "unexpected character" debug warnings, and recalculated the data
5376 unnecessarily. In any case, I expanded the warning message to give more
5379 15. Added the message "Restricted characters in address" to the statements in
5380 the default ACL that block characters like @ and % in local parts.
5382 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5383 Three changes have been made:
5385 (a) There was a serious bug; a negative response to MAIL caused the whole
5386 recipient domain to be cached as invalid, thereby blocking all messages
5387 to all local parts at the same domain, from all senders. This bug has
5388 been fixed. The domain is no longer cached after a negative response to
5389 MAIL if the sender used is not empty.
5391 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5394 (c) A new callout option, "use_sender" has been added for people who want
5395 the modified behaviour.
5401 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5404 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5405 indeed breaks things for older releases.
5407 3. Added additional logging to the case where there is a problem reading data
5408 from a filter that is running in a subprocess using a pipe, in order to
5409 try to track down a specific problem.
5411 4. Testing facility fudge: when running in the test harness and attempting
5412 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5413 getting "No route to host". Convert this to a timeout.
5415 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5418 6. Some OS don't have socklen_t but use size_t instead. This affects the
5419 fifth argument of getsockopt() amongst other things. This is now
5420 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5421 can be set for individual OS. I have set it for SunOS5, OSF1, and
5422 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5423 some earlier ones do not.
5425 7. Change 4.30/15 was not doing the test caselessly.
5427 8. The standard form for an IPv6 address literal was being rejected by address
5428 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5429 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5430 this, as well as the form without the "IPv6" on the front (but only when
5431 address literals are enabled, of course).
5433 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5435 10. Exim crashed if a message with an empty sender address specified by -f
5436 encountered a router with an errors_to setting. This could be provoked only
5437 by a command such as
5441 where an empty string was supplied; "<>" did not hit this bug.
5443 11. Installed PCRE release 4.5.
5445 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5446 remained set. It is now erased.
5448 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5449 times from message ids (which are base 36 rather than the normal 62).
5451 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5452 were being counted as actual protocol errors, and logged if the log
5453 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5454 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5455 and DATA following a set of rejected RCPTs do not count as protocol errors.
5456 In other words, Exim assumes they were pipelined, though this may not
5457 actually be the case. Of course, in all cases the client gets an
5458 appropriate error code.
5460 15. If a lookup fails in an ACL condition, a message about the failure may
5461 be available; it is used if testing the ACL cannot continue, because most
5462 such messages specify what the cause of the deferral is. However, some
5463 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5464 that caused an old message to be retained and used if a later statement
5465 caused a defer, replacing the real cause of the deferral.
5467 16. If an IP address had so many PTR records that the DNS lookup buffer
5468 was not large enough to hold them, Exim could crash while trying to process
5469 the truncated data. It now detects and logs this case.
5471 17. Further to 4.21/58, another change has been made: if (and only if) the
5472 first line of a message (the first header line) ends with CRLF, a bare LF
5473 in a subsequent header line has a space inserted after it, so as not to
5474 terminate the header.
5476 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5477 unnecessarily, used atoi() instead of strtol(), and didn't check the
5478 termination when getting file sizes from file names by regex.
5480 19. Completely re-implemented the support for maildirsize files, in the light
5481 of a number of problems with the previous contributed implementation
5482 (4.30/29). In particular:
5484 . If the quota is zero, the maildirsize file is maintained, but no quota is
5487 . If the maildir directory does not exist, it is created before any attempt
5488 to write a maildirsize file.
5490 . The quota value in the file is just a cache; if the quota is changed in
5491 the transport, the new value overrides.
5493 . A regular expression is available for excluding directories from the
5496 20. The autoreply transport checks the characters in options that define the
5497 message's headers; it allows continued headers, but it was checking with
5498 isspace() after an embedded newline instead of explicitly looking for a
5501 21. If all the "regular" hosts to which an address was routed had passed their
5502 expiry times, and had not reached their retry times, the address was
5503 bounced, even if fallback hosts were defined. Now Exim should go on to try
5506 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5507 equivalent code in the SMTP transport. Some hosts send humungous responses
5508 to HELO/EHLO, more than 1024 it seems.
5510 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5511 gives compiler warnings in some environments. I've now done it "properly",
5514 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5515 (because of problems with the built-in one) was declared to return uschar *
5516 instead of char *, causing compiler failure.
5518 25. Fixed a file descriptor leak when processing alias/forward files.
5520 26. Fixed a minor format string issue in dbfn.c.
5522 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5524 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5525 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5528 29. When a sender address is verified, it is cached, to save repeating the test
5529 when there is more than one recipient in a message. However, when the
5530 verification involves a callout, it is possible for different callout
5531 options to be set for different recipients. It is too complicated to keep
5532 track of this in the cache, so now Exim always runs a verification when a
5533 callout is required, relying on the callout cache for the optimization.
5534 The overhead is duplication of the address routing, but this should not be
5537 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5538 to be verified with callout=postmaster, and the main callout worked but the
5539 postmaster check failed, the verification correctly failed. However, if a
5540 subsequent RCPT command asked for sender verification *without* the
5541 postmaster check, incorrect caching caused this verification also to fail,
5544 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5545 it was not caching the DNS options (qualify_single, search_parents) that
5546 were used when the lookup failed. A subsequent lookup with different
5547 options therefore always gave the same answer, though there were cases
5548 where it should not have. (Example: a "domains = !$mx_any" option on a
5549 dnslookup router: the "domains" option is always processed without any
5550 widening, but the router might have qualify_single set.) Now Exim uses the
5551 cached value only when the same options are set.
5553 32. Added John Jetmore's "exipick" utility to the distribution.
5555 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5556 than a timeout (e.g. a certificate is required, and is not provided), an
5557 Exim server now closes the connection immediately. Previously it waited for
5558 the client to close - but if the client is SSL, it seems that they each
5559 wait for each other, leading to a delay before one of them times out.
5561 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5562 maintained 0.8.x compatibility because I don't think many are using it, and
5563 it is clearly obsolete.
5565 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5568 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5569 client certificate was expired. A simple patch fixes this, though I don't
5570 understand the full logic of why the verify callback is called multiple
5573 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5574 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5575 which causes problems with some clients (such as the Certicom SSL Plus
5576 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5577 disables the coutermeasure allowing Eudora to connect."
5579 38. Exim was not checking that a write() to a log file succeeded. This could
5580 lead to Bad Things if a log got too big, in particular if it hit a file
5581 size limit. Exim now panics and dies if it cannot write to a log file, just
5582 as it does if it cannot open a log file.
5584 39. Modified OS/Makefile-Linux so that it now contains
5586 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5588 The two -D definitions ensure that Exim is compiled with large file
5589 support, which makes it possible to handle log files that are bigger than
5592 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5593 instance) a domain was checked against a named list that involved a lookup,
5594 causing $domain_data to be set, then another domain was checked against the
5595 same list, then the first domain was re-checked, the value of $domain_data
5596 after the final check could be wrong. In particular, if the second check
5597 failed, it could be set empty. This bug probably also applied to
5600 41. The strip_trailing_dot option was not being applied to the address given
5601 with the -f command-line option.
5603 42. The code for reading a message's header from the spool was incrementing
5604 $received_count, but never initializing it. This meant that the value was
5605 incorrect (doubled) while delivering a message in the same process in which
5606 it was received. In the most common configuration of Exim, this never
5607 happens - a fresh exec is done - but it can happen when
5608 deliver_drop_privilege is set.
5610 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5611 it now includes up to 150 characters of the unexpected data in the log
5614 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5615 and building data strings. The size of both of these buffers was 10 000
5616 bytes - far larger than anybody would *ever* want, thought I. Needless to
5617 say, somebody hit the limit. I have increased the maximum line length to
5618 20 000 and the maximum data length of concatenated lines to 100 000. I have
5619 also fixed two bugs, because there was no checking on these buffers. Tsk,
5620 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5621 buffer is too small.
5623 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5624 lsearch lookups. Now it does.
5626 46. When parsing a route_list item in a manualroute router, a fixed-length
5627 buffer was used for the list of hosts. I made this 1024 bytes long,
5628 thinking that nobody would ever have a list of hosts that long. Wrong.
5629 Somebody had a whole pile of complicated expansion conditions, and the
5630 string was silently truncated, leading to an expansion error. It turns out
5631 that it is easier to change to an unlimited length (owing to other changes
5632 that have happened since this code was originally written) than to build
5633 structure for giving a limitation error. The length of the item that
5634 expands into the list of hosts is now unlimited.
5636 47. The lsearch lookup could not handle data where the length of text line was
5637 more than 4095 characters. Such lines were truncated, leading to shortened
5638 data being returned. It should now handle lines of any length.
5640 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5641 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5644 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5645 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5646 no longer happens in comment lines. A list of replacements is now placed
5647 at the head of all of the source files, except those whose only change is
5648 to replace PERL_COMMAND in the very first #! line.
5650 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5651 messages on the queue, with a bottom-up merge sort, using code contributed
5652 by Michael Haardt. This should make operations like -bp somewhat faster on
5653 large queues. It won't affect queue runners, except when queue_run_in_order
5656 51. Installed eximstats 1.31 in the distribution.
5658 52. Added support for SRV lookups to the dnslookup router.
5660 53. If an ACL referred to $message_body or $message_body_end, the value was not
5661 reset for any messages that followed in the same SMTP session.
5663 54. The store-handling optimization for building very long strings was not
5664 differentiating between the different store pools. I don't think this
5665 actually made any difference in practice, but I've tidied it.
5667 55. While running the routers to verify a sender address, $sender_address
5668 was still set to the sender address. This is wrong, because when routing to
5669 send a bounce to the sender, it would be empty. Therefore, I have changed
5670 it so that, while verifying a sender address, $sender_address is set to <>.
5671 (There is no change to what happens when verifying a recipient address.)
5673 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5674 target A or AAAA records (if not already returned) without resetting the
5675 qualify_single or search_parents options of the DNS resolver. These are
5676 inappropriate in this case because the targets of MX and SRV records must
5677 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5678 target that, when qualified, matched something in the local domain. These
5679 two options are now turned off when doing these lookups.
5681 57. It seems that at least some releases of Reiserfs (which does not have the
5682 concept of a fixed number of inodes) returns zero and not -1 for the
5683 number of available inodes. This interacted badly with check_spool_inodes,
5684 which assumed that -1 was the "no such thing" setting. What I have done is
5685 to check that the total number of inodes is greater than zero before doing
5686 the test of how many are available.
5688 58. When a "warn" ACL statement has a log_message modifier, the message is
5689 remembered, and not repeated. This is to avoid a lot of repetition when a
5690 message has many recipients that cause the same warning to be written.
5691 However, Exim was preserving the list of already written lines for an
5692 entire SMTP session, which doesn't seem right. The memory is now reset if a
5693 new message is started.
5695 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5696 debugging output unless log_rewrite was also set.
5698 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5699 of (int)(handle) when we know that handle contains (void *)(-1).
5701 61. The Exim daemon panic-logs an error return when it closes the incoming
5702 connection. However "connection reset by peer" seems to be common, and
5703 isn't really an error worthy of noting specially, so that particular error
5706 62. When Exim is trying to find all the local interfaces, it used to panic and
5707 die if the ioctl to get the interface flags failed. However, it seems that
5708 on at least one OS (Solaris 9) it is possible to have an interface that is
5709 included in the list of interfaces, but for which you get a failure error
5710 for this call. This happens when the interface is not "plumbed" into a
5711 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5712 failure of the "get flags" call assumes that the interface is down.
5714 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5715 makes life easier for people who are doing arithmetic on fields extracted
5716 from dates, where you often get leading zeros that should not be
5717 interpreted as octal.
5719 64. Added qualify_domain to the redirect router, to override the global
5722 65. If a pathologically long header line contained very many addresses (the
5723 report of this problem mentioned 10 000) and each of them was rewritten,
5724 Exim could use up a very large amount of memory. (It kept on making new
5725 copies of the header line as it rewrote, and never released the old ones.)
5726 At the expense of a bit more processing, the header rewriting function has
5727 been changed so that it no longer eats memory in this way.
5729 66. The generation of the Received: header has been moved from the time that a
5730 message starts to be received, to the time that it finishes. The timestamp
5731 in the Received: header should now be very close to that of the <= log
5732 line. There are two side-effects of this change:
5734 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5735 logged header lines no longer include the local Received: line, because
5736 it has not yet been created. The same applies to a copy of the message
5737 that is returned to a non-SMTP sender when a message is rejected.
5739 (b) When a filter file is tested using -bf, no additional Received: header
5740 is added to the test message. After some thought, I decided that this
5743 This change does not affect the value of $received_for. It is still set
5744 after address rewriting, but before local_scan() is called.
5746 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5748 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5749 gave an unhelpful panic error message, and a defer error. I have managed to
5750 change this behaviour so that it now rejects any supplied certificate,
5751 which seems right, as the list of acceptable certificates is empty.
5753 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5754 gave an unhelpful defer error. I have not managed to make this reject any
5755 supplied certificates, but the error message it gives is "no certificate
5756 supplied", which is not helpful.
5758 70. exigrep's output now also includes lines that are not associated with any
5759 message, but which match the given pattern. Implemented by a patch from
5760 Martin Sluka, which also tidied up the Perl a bit.
5762 71. Recipient callout verification, like sender verification, was using <> in
5763 the MAIL FROM command. This isn't really the right thing, since the actual
5764 sender may affect whether the remote host accepts the recipient or not. I
5765 have changed it to use the actual sender in the callout; this means that
5766 the cache record is now keyed on a recipient/sender pair, not just the
5767 recipient address. There doesn't seem to be a real danger of callout loops,
5768 since a callout by the remote host to check the sender would use <>.
5769 [SEE ABOVE: changed after hitting problems.]
5771 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5772 temporary errors. However, in the case of such a code being given after
5773 the end of a data transmission (i.e. after ".") Exim was failing to write
5774 a retry record for the message. (Yes, there was some broken host that was
5775 actually sending 8xx at this point.)
5777 73. An unknown lookup type in a host list could cause Exim to panic-die when
5778 the list was checked. (An example that provoked this was putting <; in the
5779 middle of a list instead of at the start.) If this happened during a DATA
5780 ACL check, a -D file could be left lying around. This kind of configuration
5781 error no longer causes Exim to die; instead it causes a defer error. The
5782 incident is still logged to the main and panic logs.
5784 74. Buglet left over from Exim 3 conversion. The message "too many messages
5785 in one connection" was written to the rejectlog but not the mainlog, except
5786 when address rewriting (yes!) was being logged.
5788 75. Added write_rejectlog option.
5790 76. When a system filter was run not as root (that is, when system_filter_user
5791 was set), the values of the $n variables were not being returned to the
5792 main process; thus, they were not subsequently available in the $sn
5795 77. Added +return_path_on_delivery log selector.
5797 78. A connection timeout was being treated differently from recipients deferred
5798 when testing hosts_max_try with a message that was older than the host's
5799 retry timeout. (The host should not be counted, thus allowing all hosts to
5800 be tried at least once before bouncing.) This may have been the cause of an
5801 occasionally reported bug whereby a message would remain on the queue
5802 longer than the retry timeout, but would be bounced if a delivery was
5803 forced. I say "may" because I never totally pinned down the problem;
5804 setting up timeout/retry tests is difficult. See also the next item.
5806 79. The ultimate address timeout was not being applied to errors that involved
5807 a combination of host plus message (for example, a timeout on a MAIL
5808 command). When an address resolved to a number of possible hosts, and they
5809 were not all tried for each delivery (e.g. because of hosts_max_try), a
5810 message could remain on the queue longer than the retry timeout.
5812 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5815 81. Fixed an obscure SMTP outgoing bug which required at least the following
5816 conditions: (a) there was another message waiting for the same server;
5817 (b) the server returned 5xx to all RCPT commands in the first message so
5818 that the message was not completed; (c) the server dropped the connection
5819 or gave a negative response to the RSET that Exim sends to abort the
5820 transaction. The observed case was a dropped connection after DATA that had
5821 been sent in pipelining mode. That is, the server had advertised PIPELINING
5822 but was not implementing it correctly. The effect of the bug was incorrect
5823 behaviour, such as trying another host, and this could lead to a crash.
5829 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5830 and daemon.c were passed as pointers to ints; they should have been
5831 pointers to socklen_t variables (which are typically unsigned ints).
5833 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5836 3. Fixed a really odd bug that affected only the testing scheme; patching a
5837 certain fixed string in the binary changed the value of another string that
5838 happened to be identical to the end of the original first string.
5840 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5841 name", it returns that address as the IP address. On some operating
5842 systems (e.g. Solaris), it also passes back the IP address string as the
5843 "host name". However, on others (e.g. Linux), it passes back an empty
5844 string. Exim wasn't checking for this, and was changing the host name to an
5845 empty string, assuming it had been canonicalized.
5847 5. Although rare, it is permitted to have more than one PTR record for a given
5848 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5849 all the names associated with an address, because they do in Solaris.
5850 However, it seems that they do not in Linux for data that comes from the
5851 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5852 I found this out when I moved to a new Linux workstation and tried to run
5853 the Exim test suite.
5855 To get round this problem I have changed the code so that it now does its
5856 own call to the DNS to look up PTR records when searching for a host name.
5857 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5858 addresses that are only in /etc/hosts are still found.
5860 This behaviour is, however, controlled by an option called host_lookup_
5861 order, which defaults to "bydns:byaddr". If people want to use the other
5862 order, or indeed, just use one or the other means of lookup, they can
5863 specify it in this variable.
5865 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5866 some operating systems, this comes back from gethostbyaddr() as an empty
5867 string, and this is what Exim used to test for. However, it seems that in
5868 other systems, "." is yielded. Exim now tests for this case too.
5870 7. The values of check_spool_space and check_log_space are now held internally
5871 as a number of kilobytes instead of an absolute number of bytes. If a
5872 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5873 kilobyte. This means that much larger values can be stored.
5875 8. Exim monitor: an attempt to get the action menu when not actually pointing
5876 at a message produces an empty menu entitled "No message selected". This
5877 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5878 no entries in it ("Shell widget menu has zero width and/or height"). So I
5879 have added a single, blank menu entry in this case.
5881 9. Added ${quote_local_part.
5883 10. MIME decoding is now applied to the contents of Subject: header lines when
5886 11. Now that a reference to $sender_host_address automatically causes a reverse
5887 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5888 host lookup before query-style lookups in lists that might use this
5889 variable. This has therefore been abolished, and the "net-" prefix is no
5890 longer necessary for query-style lookups.
5892 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5893 have been a typo for LFLAGS, so it has been changed.
5895 13. The install script calls Exim with "-C /dev/null" in order to find the
5896 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5897 to be output. However, since Exim outputs its version number before the
5898 error, it didn't break the script. It just looked ugly. I fixed this by
5899 always allowing "-C /dev/null" if the caller is root.
5901 14. Ignore overlarge ACL variable number when reading spool file - insurance
5902 against a later release with more variables having written the file.
5904 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5905 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5906 this, as well as the form without the "IPv6" on the front.
5908 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5909 OS/Makefile-Darwin file.
5911 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5912 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5914 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5915 variable. However, some OS use ints for inodes. I've added cast to long int
5916 to get rid of the compiler warning.
5918 19. I had forgotten to lock out "/../" in configuration file names when
5919 ALT_CONFIG_PREFIX was set.
5921 20. Routers used for verification do not need to specify transports. However,
5922 if such a router generated a host list, and callout was configured, Exim
5923 crashed, because it could not find a port number from the (non-existent)
5924 transport. It now assumes port 25 in this circumstance.
5926 21. Added the -t option to exigrep.
5928 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5929 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5930 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5931 them is set, LOOKUP_LSEARCH is forced.
5933 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5935 24. Added sender and host information to the "rejected by local_scan()" log
5936 line; previously there was no indication of these.
5938 25. Added .include_if_exists.
5940 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5941 Linux. It turns out that not all file systems support this. Apparently some
5942 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5943 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5944 not supported on the file descriptor, is now ignored when Exim is trying to
5945 sync a directory. This applies only to Linux.
5947 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5949 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5950 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5953 29. Added support for maildirsize files from supplied patch (modified a bit).
5955 30. The use of :fail: followed by an empty string could lead Exim to respond to
5956 sender verification failures with (e.g.):
5958 550 Verification failed for <xxx>
5959 550 Sender verify failed
5961 where the first response line was missing the '-' that indicates it is not
5962 the final line of the response.
5964 31. The loop for finding the name of the user that called Exim had a hardwired
5965 limit of 10; it now uses the value of finduser_retries, which is used for
5966 all other user lookups.
5968 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5971 33. Exim was neglecting to zero errno before one call of strtol() when
5972 expanding a string and expecting an integer value. On some systems this
5973 resulted in spurious "integer overflow" errors. Also, it was casting the
5974 result into an int without checking.
5976 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5977 did not work. The code looks as if it has *never* worked, though it appears
5978 to have been documented since at least release 1.62. I have made it work.
5980 35. The "timeout_DNS" error in retry rules, also documented since at least
5981 1.62, also never worked. As it isn't clear exactly what this means, and
5982 clearly it isn't a major issue, I have abolished the feature by treating it
5983 as "timeout", and writing a warning to the main and panic logs.
5985 36. The display of retry rules for -brt wasn't always showing the error code
5988 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5989 timeout_connect_A, timeout_connect_MX.
5991 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5992 to the empty sender.
5994 39. The daemon was not analysing the content of -oX till after it had closed
5995 stderr and disconnected from the controlling terminal. This meant that any
5996 syntax errors were only noted on the panic log, and the return code from
5997 the command was 0. By re-arranging the code a little, I've made the
5998 decoding happen first, so such errors now appear on stderr, and the return
5999 code is 1. However, the actual setting up of the sockets still happens in
6000 the disconnected process, so errors there are still only recorded on the
6003 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6004 connections (as happens on some IP stacks) was logged at start up time as
6005 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6006 it from "IPv6 and IPv4", which means that two separate sockets are being
6009 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6010 says whether AF_INET or AF_INET6 was passed as an argument.
6012 42. Exiwhat output was messed up when time zones were included in log
6015 43. Exiwhat now gives more information about the daemon's listening ports,
6016 and whether -tls-on-connect was used.
6018 44. The "port" option of the smtp transport is now expanded.
6020 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6021 silently ignored. Now an error message is written to the main and panic
6024 46. There's a new ACL modifier called "logwrite" which writes to a log file
6025 as soon as it is encountered.
6027 47. Added $local_user_uid and $local_user_gid at routing time.
6029 48. Exim crashed when trying to verify a sender address that was being
6032 49. Exim was recognizing only a space character after ".include". It now also
6033 recognizes a tab character.
6035 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6036 extracting the relevant information from the specification. The man page no
6037 longer contains scrambled data for the -d option, and I've added a section
6038 at the front about calling Exim under different names.
6040 51. Added "extra_headers" argument to the "mail" command in filter files.
6042 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6045 53. Installed eximstats 1.29.
6047 54. Added transport_filter_timeout as a generic transport option.
6049 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6050 Cc: header lines. This was required by RFC 822, but it not required by RFC
6053 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6054 incoming messages that did not have them. Now it does so only if the
6055 message originates locally, that is, if there is no associated remote host
6056 address. When Resent- header lines are present, this applies to the Resent-
6057 lines rather than the non-Resent- lines.
6059 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6060 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6062 58. Messages for configuration errors now include the name of the main
6063 configuration file - useful now that there may be more than one file in a
6064 list (.included file names were always shown).
6066 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6067 for those rare installations that do not start the daemon as root or run it
6068 setuid root. I've cut out the call to initgroups() if the daemon is not
6071 60. The Exim user and group can now be bound into the binary as text strings
6072 that are looked up at the start of Exim's processing.
6074 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6076 62. Added $mailstore_basename variable.
6078 63. Installed patch to sieve.c from Michael Haardt.
6080 64. When Exim failed to open the panic log after failing to open the main log,
6081 the original message it was trying to log was written to stderr and debug
6082 output, but if they were not available (the usual case in production), it
6083 was lost. Now it is written to syslog before the two lines that record the
6084 failures to open the logs.
6086 65. Users' Exim filters run in subprocesses under the user's uid. It is
6087 possible for a "deliver" command or an alias in a "personal" command to
6088 provoke an address rewrite. If logging of address rewriting is configured,
6089 this fails because the process is not running as root or exim. There may be
6090 a better way of dealing with this, but for the moment (because 4.30 needs
6091 to be released), I have disabled address rewrite logging when running a
6092 filter in a non-root, non-exim process.
6098 1. The buildconfig auxiliary program wasn't quoting the value set for
6099 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6100 not defined. This bug was masked in 4.22 by the effect that was fixed in
6103 2. Some messages that were rejected after a message id was allocated were
6104 shown as "incomplete" by exigrep. It no longer does this for messages that
6105 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6107 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6108 have allow_domain_literals set, the ID did not get logged in the <= line.
6109 Domain literals are now always recognized in Message-ID: header lines.
6111 4. The first argument for a ${extract expansion item is the key name or field
6112 number. Leading and trailing spaces in this item were not being ignored,
6113 causing some misleading effects.
6115 5. When deliver_drop_privilege was set, single queue runner processes started
6116 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6117 same command in the process it spins off) were not dropping privilege.
6119 6. When the daemon running as "exim" started a queue runner, it always
6120 re-executed Exim in the spun-off process. This is a waste of effort when
6121 deliver_drop_privilege is set. The new process now just calls the
6122 queue-runner function directly.
6128 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6131 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6132 ignored. Though the use of -oP was forcing the writing of a pid file, it
6133 was always written to the default place.
6135 3. If the message "no IP address found for host xxxx" is generated during
6136 incoming verification, it is now followed by identification of the incoming
6137 connection (so you can more easily find what provoked it).
6139 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6141 5. Added some features to "harden" Exim a bit more against certain attacks:
6143 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6144 be put in Local/Makefile. This is like the never_users runtime option,
6145 but it cannot be overridden. The default setting is "root".
6147 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6148 prefix string with which any file named in a -C command line option
6151 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6152 is retained for -C and -D only if the caller of Exim is root. Without
6153 it, the exim user may also use -C and -D and retain privilege.
6155 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6156 command line option is disabled.
6158 6. Macro names set by the -D option must start with an upper case letter, just
6159 like macro names defined in the configuration file.
6161 7. Added "dereference=" facility to LDAP.
6163 8. Two instances of the typo "uknown" in the source files are fixed.
6165 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6166 the Configure-Makefile script screwed up while processing it.
6168 10. Incorporated PCRE 4.4.
6170 11. The SMTP synchronization check was not operating right at the start of an
6171 SMTP session. For example, it could not catch a HELO sent before the client
6172 waited for the greeting. There is now a check for outstanding input at the
6173 point when the greeting is written. Because of the duplex, asynchronous
6174 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6175 way, but not yet received, when the check is performed.
6177 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6178 on TCP/IP sockets, because this apparently causes some broken clients to
6181 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6182 unchanged) from the Cygwin maintainer.
6184 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6185 was supported instead of testing for mbx. Effectively a typo.
6187 15. The spa authenticator server code was not checking that the input it
6188 received was valid base64.
6190 16. The debug output line for the "set" modifier in ACLs was not showing the
6191 name of the variable that was being set.
6193 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6195 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6196 lookup on its own. Something else was needed to trigger the lookup. For
6197 example, a match in host_lookup or the need for a host name in a host list.
6198 Now, if $sender_host_name is referenced and the host name has not yet been
6199 looked up, a lookup is performed. If the lookup fails, the variable remains
6200 empty, and $host_lookup_failed is set to "1".
6202 19. Added "eqi" as a case-independent comparison operator.
6204 20. The saslauthd authentication condition could segfault if neither service
6205 nor realm was specified.
6207 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6208 error message that was logged was misleading, and incoming SMTP
6209 connections were dropped. The message is now more accurate, and temporary
6210 errors are given to SMTP connections.
6212 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6213 (except RSET) with a 421 error, until QUIT is received. However, it was
6214 failing to send a response to QUIT.
6216 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6217 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6218 ACL is now run after the helo_try_verify_hosts code.
6220 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6221 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6222 case-independent, so other case variants are also recognized). Apparently
6223 some systems use these upper case variants.
6225 25. If more than two messages were waiting for the same host, and a transport
6226 filter was specified for the transport, Exim sent two messages over the
6227 same TCP/IP connection, and then failed with "socket operation on non-
6228 socket" when it tried to send the third.
6230 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6232 27. The extern definition of crypt16() in expand.c was not being excluded when
6233 the OS had its own crypt16() function.
6235 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6236 as a preferred synonym for return_size_limit, both as an option and as an
6239 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6241 30. Changed the default configuration ACL to relax the local part checking rule
6242 for addresses that are not in any local domains. For these addresses,
6243 slashes and pipe symbols are allowed within local parts, but the sequence
6244 /../ is explicitly forbidden.
6246 31. SPA server authentication was not clearing the challenge buffer before
6249 32. log_message in a "warn" ACL statement was writing to the reject log as
6250 well as to the main log, which contradicts the documentation and doesn't
6251 seem right (because no rejection is happening). So I have stopped it.
6253 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6254 However, I am unable to do any testing of this.
6256 34. Fixed an infelicity in the appendfile transport. When checking directories
6257 for a mailbox, to see if any needed to be created, it was accidentally
6258 using path names with one or more superfluous leading slashes; tracing
6259 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6261 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6262 contents are added to the log line that is written for every discarded
6263 recipient. (Previously a log_message setting was ignored.)
6265 36. The ${quote: operator now quotes the string if it is empty.
6267 37. The install script runs exim in order to find its version number. If for
6268 some reason other than non-existence or emptiness, which it checks, it
6269 could not run './exim', it was installing it with an empty version number,
6270 i.e. as "exim-". This error state is now caught, and the installation is
6273 38. An argument was missing from the function that creates an error message
6274 when Exim fails to connect to the socket for saslauthd authentication.
6275 This could cause Exim to crash, or give a corrupted message.
6277 39. Added isip, isip4, and isip6 to ${if conditions.
6279 40. The ACL variables $acl_xx are now saved with the message, and can be
6280 accessed later in routers, transports, and filters.
6282 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6283 strings in the file are not string-expanded.
6285 42. If a MAIL command specified a SIZE value that was too large to fit into an
6286 int variable, the check against message_size_limit failed. Such values are
6287 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6288 day this will have to be increased, but I don't think I want to be around
6289 when emails are that large.
6296 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6297 iconv() is not standard in FreeBSD.
6299 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6300 IPv6 enabled. The observed symptom was a segmentation fault on return from
6301 the function os_common_find_running_interfaces() in src/os.c.
6303 3. In the check_special_case() function in daemon.c I had used "errno" as an
6304 argument name, which causes warnings on some systems. This was basically a
6305 typo, since it was named "eno" in the comments!
6307 4. The code that waits for the clock to tick (at a resolution of some fraction
6308 of a second) so as to ensure message-id uniqueness was always waiting for
6309 at least one whole tick, when it could have waited for less. [This is
6310 almost certainly not relevant at current processor speeds, where it is
6311 unlikely to ever wait at all. But we try to future-proof.]
6313 5. The function that sleeps for a time interval that includes fractions of a
6314 second contained a race. It did not block SIGALRM between setting the
6315 timer, and suspending (a couple of lines later). If the interval was short
6316 and the sigsuspend() was delayed until after it had expired, the suspension
6317 never ended. On busy systems this could lead to processes getting stuck for
6320 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6321 process, before it forks any delivery processes. The open lookup caching
6322 mechanism meant that the open file or database connection was passed into
6323 the delivery process. The problem was that delivery processes always tidy
6324 up cached lookup data. This could cause a problem for the next delivery
6325 process started by the queue runner, because the external queue runner
6326 process does not know about the closure. So the next delivery process
6327 still has data in the lookup cache. In the case of a file lookup, there was
6328 no problem because closing a file descriptor in a subprocess doesn't affect
6329 the parent. However, if the lookup was caching a connection to a database,
6330 the connection was closed, and the second delivery process was likely to
6331 see errors such as "PGSQL: query failed: server closed the connection
6332 unexpectedly". The problem has been fixed by closing all cached lookups
6333 in a queue runner before running a delivery process.
6335 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6336 seem to have the "const" qualifier which it has on other OS. I've
6339 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6340 *of the same type* (client or server) with the same public name that an
6341 error should be diagnosed.
6343 9. When Exim looked up a host name for an IP address, but failed to find the
6344 original IP address when looking up the host name (a safety check), it
6345 output the message "<ip address> does not match any IP for NULL", which was
6346 confusing, to say the least. The bug was that the host name should have
6347 appeared instead of "NULL".
6349 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6350 user that is built into the binary, and the -C or -D options is used, root
6351 privilege is dropped before the configuration file is read. In addition,
6352 logging is switched to stderr instead of the normal log files. If the
6353 configuration then re-defines the Exim user, the unprivileged environment
6354 is probably not what is expected, so Exim logs a panic warning message (but
6357 However, if deliver_drop_privilege is set, the unprivileged state may well
6358 be exactly what is intended, so the warning has been cut out in that case,
6359 and Exim is allowed to try to write to its normal log files.
6365 1. smtp_return_error_details was not giving details for temporary sender
6366 or receiver verification errors.
6368 2. Diagnose a configuration error if two authenticators have the same public
6371 3. Exim used not to create the message log file for a message until the first
6372 delivery attempt. This could be confusing when incoming messages were held
6373 for policy or load reasons. The message log file is now created at the time
6374 the message is received, and an initial "Received" line is written to it.
6376 4. The automatically generated man page for command line options had a minor
6377 bug that caused no ill effects; however, a more serious problem was that
6378 the procedure for building the man page automatically didn't always
6379 operate. Consequently, release 4.20 contains an out-of-date version. This
6380 shouldn't happen again.
6382 5. When building Exim with embedded Perl support, the script that builds the
6383 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6384 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6386 6. The freeze_tell option was not being used for messages that were frozen on
6387 arrival, either by an ACL or by local_scan().
6389 7. Added the smtp_incomplete_transaction log selector.
6391 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6392 was accepting AUTH without a new EHLO.
6394 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6395 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6398 10. Logging of TCP/IP connections (when configured) now happens in the main
6399 daemon process instead of the child process, so that the TCP/IP connection
6400 count is more accurate (but it can never be perfect).
6402 11. The use of "drop" in a nested ACL was not being handled correctly in the
6403 outer ACL. Now, if condition failure induced by the nested "drop" causes
6404 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6405 or "require"), the connection is dropped.
6407 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6408 that yield "discard" can now be used with an "accept" or a "discard" verb,
6409 but an error is generated for any others (because I can't see a useful way
6410 to define what should happen).
6412 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6413 are now processed in the same way as lines in the Exim configuration file.
6414 In particular, continuation lines are supported.
6416 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6418 15. Added -ti meaning -t -i.
6420 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6421 domains, and warn by logging if others are found.
6423 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6424 returned from GIFCONF when Exim is trying to find the list of interfaces on
6425 a host. The code in os.c has been modified to copy each ifreq to an aligned
6426 structure in all cases.
6428 Also, in some cases, the returned ifreq's were being copied to a 'struct
6429 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6430 means the last couple of bytes of an IPv6 address could be chopped if the
6431 ifreq contained only a normal sockaddr (14 bytes storage).
6433 18. Named domain lists were not supported in the hosts_treat_as_local option.
6434 An entry such as +xxxx was not recognized, and was treated as a literal
6437 19. Ensure that header lines added by a DATA ACL are included in the reject log
6438 if the ACL subsequently rejects the message.
6440 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6441 MD5 (which is deprecated).
6443 21. When testing a filter file using -bf, Exim was writing a message when it
6444 took the sender from a "From " line in the message, but it was not doing so
6445 when it took $return_path from a Return-Path: header line. It now does.
6447 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6448 with a valid header line field name (a series of printing characters
6449 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6451 23. Changed "disc" in the source to "disk" to conform to the documentation and
6452 the book and for uniformity.
6454 24. Ignore Sendmail's -Ooption=value command line item.
6456 25. When execve() failed while trying to run a command in a pipe transport,
6457 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6458 could be confused with a return value of 69 from the command itself. This
6459 has been changed to 127, the value the shell returns if it is asked to run
6460 a non-existent command. The wording for the related log line suggests a
6461 non-existent command as the problem.
6463 26. If received_header_text expands to an empty string, do not add a Received:
6464 header line to the message. (Well, it adds a token one on the spool, but
6465 marks it "old" so that it doesn't get used or transmitted.)
6467 27. Installed eximstats 1.28 (addition of -nt option).
6469 28. There was no check for failure on the call to getsockname() in the daemon
6470 code. This can fail if there is a shortage of resources on the system, with
6471 ENOMEM, for example. A temporary error is now given on failure.
6473 29. Contrary to the C standard, it seems that in some environments, the
6474 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6475 program. Exim now does this explicitly; it affects the formatting of
6476 timestamps using strftime().
6478 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6479 complaints. I've now initialized all the variables, to avoid this.
6481 32. Header lines added by a system filter were not being "seen" during
6482 transport-time rewrites.
6484 33. The info_callback() function passed to OpenSSL is set up with type void
6485 (*)(SSL *, int, int), as described somewhere. However, when calling the
6486 function (actually a macro) that sets it up, the type void(*)() is
6487 expected. I've put in a cast to prevent warnings from picky compilers.
6489 34. If a DNS black list lookup found a CNAME record, but there were no A
6490 records associated with the domain it pointed at, Exim crashed.
6492 35. If a DNS black list lookup returned more than one A record, Exim ignored
6493 all but the first. It now scans all returned addresses if a particular IP
6494 value is being sought. In this situation, the contents of the
6495 $dnslist_value variable are a list of all the addresses, separated by a
6498 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6499 to accept a host name and all its aliases if the forward lookup for any of
6500 them yielded the IP address of the incoming connection. Now it accepts only
6501 those names whose forward lookup yields the correct IP address. Any other
6502 names are discarded. This closes a loophole whereby a rogue DNS
6503 administrator could create reverse DNS records to break through a
6504 wildcarded host restriction in an ACL.
6506 37. If a user filter or a system filter that ran in a subprocess used any of
6507 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6508 the wrong values were passed to the pipe command ($thisaddress had the
6509 value of $0, $0 had the value of $1, etc). This bug was introduced by
6510 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6512 38. Improved the line breaking for long SMTP error messages from ACLs.
6513 Previously, if there was no break point between 40 and 75 characters, Exim
6514 left the rest of the message alone. Two changes have been made: (a) I've
6515 reduced the minimum length to 35 characters; (b) if it can't find a break
6516 point between 35 and 75 characters, it looks ahead and uses the first one
6517 that it finds. This may give the occasional overlong line, but at least the
6518 remaining text gets split now.
6520 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6521 file descriptors might be low, and that setting 1000 would always raise it.
6522 It turns out that in some environments, the limit is already over 1000 and
6523 that lowering it causes trouble. So now Exim takes care not to decrease it.
6525 40. When delivering a message, the value of $return_path is set to $sender_
6526 address at the start of routing (routers may change the value). By an
6527 oversight, this default was not being set up when an address was tested by
6528 -bt or -bv, which affected the outcome if any router or filter referred to
6531 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6532 log only when "message" or "log_message" are set. However, if one of the
6533 conditions was an address verification, or a call to a nested ACL, the
6534 messages generated by the underlying test were being passed through. This
6535 no longer happens. The underlying message is available in $acl_verify_
6536 message for both "message" and "log_message" expansions, so it can be
6537 passed through if needed.
6539 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6540 new expansion $bh_ to give the encoded byte string without charset
6541 translation. Translation happens only if iconv() is available; HAVE_ICONV
6542 indicates this at build time. HEADERS_CHARSET gives the charset to
6543 translate to; headers_charset can change it in the configuration, and
6544 "headers charset" can change it in an individual filter file.
6546 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6547 that creates RFC 2047 encoded "words" labels them as that charset instead
6548 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6549 expansion operator; (ii) when Exim creates a From: line for a local
6550 message; (iii) when a header line is rewritten to include a "phrase" part.
6552 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6553 buggy, causing it to skip the first lines of messages whose message ID
6554 ended in 'D'. This would not have bitten before Exim release 4.14, because
6555 message IDs were unlikely to end in 'D' before then. The effect was to have
6556 incorrect size information for certain domains.
6558 45. #include "config.h" was missing at the start of the crypt16.c module. This
6559 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6562 46. If there was a timeout during a "random" callout check, Exim treated it as
6563 a failure of the random address, and carried on sending RSET and the real
6564 address. If the delay was just some slowness somewhere, the response to the
6565 original RCPT would be taken as a response to RSET and so on, causing
6566 mayhem of various kinds.
6568 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6569 when I implemented it. It didn't allow for the fact that some option values
6570 may legitimately be negative (e.g. size_addition), and it didn't even do
6571 the right test for positive values.
6573 48. Domain names in DNS records are case-independent. Exim always looks them up
6574 in lower case. Some resolvers return domain names in exactly the case they
6575 appear in the zone file, that is, they may contain uppercase letters. Not
6576 all resolvers do this - some return always lower case. Exim was treating a
6577 change of case by a resolver as a change of domain, similar to a widening
6578 of a domain abbreviation. This triggered its re-routing code and so it was
6579 trying to route what was effectively the same domain again. This normally
6580 caused routing to fail (because the router wouldn't handle the domain
6581 twice). Now Exim checks for this case specially, and just changes the
6582 casing of the domain that it ultimately uses when it transmits the message
6585 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6588 50. If a filter generated a file delivery with a non-absolute name (possible if
6589 no home directory exists for the router), the forbid_file option was not
6592 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6593 the existing equality matching.
6595 52. Exim was using ints instead of ino_t variables in some places where it was
6596 dealing with inode numbers.
6598 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6599 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6600 called TMPDIR, and if it finds it is different, it changes its value.
6602 54. The smtp_printf() function is now made available to local_scan() so
6603 additional output lines can be written before returning. There is also an
6604 smtp_fflush() function to enable the detection of a dropped connection.
6605 The variables smtp_input and smtp_batched_input are exported to
6608 55. Changed the default runtime configuration: the message "Unknown user"
6609 has been removed from the ACL, and instead placed on the localuser router,
6610 using the cannot_route_message feature. This means that any verification
6611 failures that generate their own messages won't get overridden. Similarly,
6612 the "Unrouteable address" message that was in the ACL for unverifiable
6613 relay addresses has also been removed.
6615 56. Added hosts_avoid_esmtp to the smtp transport.
6617 57. The exicyclog script was not checking for the esoteric option
6618 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6619 will work only if exicyclog is run under the appropriate euid.
6621 58. Following a discussion on the list, the rules by which Exim recognises line
6622 endings on incoming messages have been changed. The -dropcr and drop_cr
6623 options are now no-ops, retained only for backwards compatibility. The
6624 following line terminators are recognized: LF CRLF CR. However, special
6625 processing applies to CR:
6627 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6628 nor a local message in the state where . is a terminator.
6630 (ii) If a bare CR is encountered in a header line, an extra space is added
6631 after the line terminator so as not to end the header. The reasoning
6632 behind this is that bare CRs in header lines are most likely either
6633 to be mistakes, or people trying to play silly games.
6635 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6636 was being incorrectly given as 18 bytes larger than it should have been.
6637 This is a VOB (very old bug).
6639 60. This may never have affected anything current, but just in case it has:
6640 When the local host is found other than at the start of a list of hosts,
6641 the local host, those with the same MX, and any that follow, are discarded.
6642 When the list in question was part of a longer list of hosts, the following
6643 hosts (not currently being processed) were also being discarded. This no
6644 longer happens. I'm not sure if this situation could ever has previously
6647 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6650 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6651 header. This is something that is recommended in a new Internet Draft, and
6652 is something that is documented as being done by Sendmail. There are two
6653 possible values. For messages generated by the autoreply transport, Exim
6656 Auto-Submitted: auto-replied
6658 whereas for all other generated messages (e.g. bounces) it adds
6660 Auto-Submitted: auto-generated
6662 63. The "personal" condition in filters now includes a test for the
6663 Auto-Submitted: header. If it contains the string "auto-" the message it
6664 not considered personal.
6666 64. Added rcpt_include_affixes as a generic transport option.
6668 65. Added queue_only_override (default true).
6670 66. Added the syslog_duplication option.
6672 67. If what should have been the first header line of a message consisted of
6673 a space followed by a colon, Exim was mis-interpreting it as a header line.
6674 It isn't of course - it is syntactically invalid and should therefore be
6675 treated as the start of the message body. The misbehaviour could have
6676 caused a number of strange effects, including loss of data in subsequent
6677 header lines, and spool format errors.
6679 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6680 client host had authenticated. This control can now be exercised by an ACL
6681 for more flexibility.
6683 69. By default, callouts do not happen when testing with -bh. There is now a
6684 variant, -bhc, which does actually run the callout code, including
6685 consulting and updating the callout cache.
6687 70. Added support for saslauthd authentication, courtesy of Alexander
6690 71. If statvfs() failed on the spool or log directories while checking their
6691 size for availability, Exim confusingly gave the error "space shortage".
6692 Furthermore, in debugging mode it crashed with a floating point exception.
6693 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6694 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6695 serious problem, Exim now writes to the main and panic logs when this
6696 happens, with details of the failure. It then refuses to accept the
6697 incoming message, giving the message "spool directory problem" or "log
6698 directory problem" with a 421 code for SMTP messages.
6700 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6701 0, 1, and 2 exist, because some OS complain for execs without them (see
6702 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6703 descriptors. However, the code omitted to check that the open succeeded,
6704 causing mysterious errors if for some reason the permissions on /dev/null
6705 got screwed. Now Exim writes a message to the main and panic logs, and
6706 bombs out if it can't open /dev/null.
6708 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6709 interact so that it is all more flexible. It is supposed to remain
6710 backwards compatible. Also added extra_local_interfaces.
6712 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6713 to bomb out with an assertion failure - to the client this appears as a
6714 connection drop. This problem occurs in the part of the code that was taken
6715 from the Samba project. Fortunately, the assertion is in a very simple
6716 function, so I have fixed this by reproducing the function inline in the
6717 one place where it is called, and arranging for authentication to fail
6718 instead of killing the process with assert().
6720 75. The SPA client code was not working when the server requested OEM rather
6721 than Unicode encoding.
6723 76. Added code to make require_files with a specific uid setting more usable in
6724 the case where statting the file as root fails - usually a non-root-mounted
6725 NFS file system. When this happens and the failure is EACCES, Exim now
6726 forks a subprocess and does the per-uid checking as the relevant uid.
6728 77. Added process_log_path.
6730 78. If log_file_path was not explicitly set, a setting of check_log_space or
6731 check_log_inodes was ignored.
6733 79. If a space check for the spool or log partitions fails, the incident is now
6734 logged. Of course, in the latter case the data may get lost...
6736 80. Added the %p formatting code to string_format() so that it can be used to
6737 print addresses in debug_print(). Adjusted all the address printing in the
6738 debugging in store.c to use %p rather than %d.
6740 81. There was a concern that a line of code in smtp_in.c could overflow a
6741 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6742 initially expressed, the concern was not well-founded, because trailing
6743 spaces are removed early. However, if the trailing spaces were followed by
6744 a NULL, they did not get removed, so the overflow was possible. Two fixes
6747 (a) I re-wrote the offending code in a cleaner fashion.
6748 (b) If an incoming SMTP command contains a NULL character, it is rejected
6751 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6752 runs initgroups(), so that if the Exim user is in any additional groups,
6753 they will be used during message reception.
6759 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob