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.
8 Exim version 4.89+fixes
9 -----------------------
10 Cherry-Picked from the master development branch
11 -------------------------------------------------
13 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
15 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
16 Disable the session-cache too, which might reduce our load. Since we
17 currrectly use a new context for every connection, both as server and
18 client, there is no benefit for these.
19 GnuTLS appears to not support tickets server-side by default (we don't
20 call gnutls_session_ticket_enable_server()) but client side is enabled
21 by default on recent versions (3.1.3 +) unless the PFS priority string
28 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
29 than -2003 did; needs libidn2 in addition to libidn.
31 JH/02 The path option on a pipe transport is now expanded before use.
33 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
34 Patch provided by "Björn", documentation fix added too.
36 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
37 missing a wire-to-host endian conversion.
39 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
40 close after a BDAT command line could be taken as a following command,
41 giving a synch failure. Fix by only checking for synch immediately
42 before acknowledging the chunk.
44 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
45 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
46 macro. Patches provided by Josh Soref.
48 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
49 Previously we did not; the RFC seems ambiguous and VRFY is not listed
50 by IANA as a service extension. However, John Klensin suggests that we
53 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
54 the dkim code may be unix-mode line endings rather than smtp wire-format
55 CRLF, so prepend a CR to any bare LF.
57 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
58 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
60 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
61 the first were themselves being wrongly included in the feed into dkim
62 processing; with most chunk sizes in use this resulted in an incorrect
63 body hash calculated value.
65 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
66 DKIM signature block, for verification. Although advised against by
67 standards it is specifically not ruled illegal.
69 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
71 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
72 missing a body hash (the bh= tag).
74 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
75 It seems that HAProxy sends the Proxy Protocol information in clear and
76 only then does a TLS startup, so do the same.
78 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
79 TCP connections (such as for Spamd) unless the daemon successfully set
80 Fast Open mode on its listening sockets. This fixes breakage seen on
81 too-old kernels or those not configured for Fast Open, at the cost of
82 requiring both directions being enabled for TFO, and TFO never being used
83 by non-daemon-related Exim processes.
85 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
86 endings, at least on the first header line. Try to canonify any that get
87 past that check, despite the cost.
89 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
90 now limited to an arbitrary five deep, while parsing addresses with the
91 strip_excess_angle_brackets option enabled.
93 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
94 instead leave the unprompted TLS handshake in socket buffer for the
95 TLS library to consume.
97 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
99 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
101 JH/16 Drop variables when they go out of scope. Memory management drops a whole
102 region in one operation, for speed, and this leaves assigned pointers
103 dangling. Add checks run only under the testsuite which checks all
104 variables at a store-reset and panics on a dangling pointer; add code
105 explicitly nulling out all the variables discovered. Fixes one known
106 bug: a transport crash, where a dangling pointer for $sending_ip_address
107 originally assigned in a verify callout, is re-used.
109 PP/06 Drop '.' from @INC in various Perl scripts.
111 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
113 PP/08 Reduce a number of compilation warnings under clang; building with
114 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
115 should be warning-free.
117 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
119 HS/01 Fix portability problems introduced by PP/08 for platforms where
120 realloc(NULL) is not equivalent to malloc() [SunOS et al].
122 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
123 chunk. This allows us to accept broken chunked messages. We need a more
124 general solution here.
126 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
127 already-broken messages in the queue.
129 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
131 JH/19 Fix reference counting bug in routing-generated-address tracking.
137 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
138 supports it and a size is available (ie. the sending peer gave us one).
140 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
141 years of being deprecated). The replacements are the ACLs
142 acl_smtp_mime and acl_not_smtp_mime.
144 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
145 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
146 or even an in-clear connection were permitted. Now, if the host lookup
147 was dnssec and dane was requested then the host is only used if the
148 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
149 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
150 if one fails this test.
151 This means that a poorly-configured remote DNS will make it incommunicado;
152 but it protects against a DNS-interception attack on it.
154 JH/04 Bug 1810: make continued-use of an open smtp transport connection
155 non-noisy when a race steals the message being considered.
157 JH/05 If main configuration option tls_certificate is unset, generate a
158 self-signed certificate for inbound TLS connections.
160 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
161 in rewrites and routers.
163 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
164 and logged a warning sing 4.83; now they are a configuration file error.
166 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
167 (lacking @domain). Apply the same qualification processing as RCPT.
169 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
171 JH/10 Support ${sha256:} applied to a string (as well as the previous
174 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
175 a cutthrough deliver is pending, as we always want to make a connection.
176 This also avoids re-routing the message when later placing the cutthrough
177 connection after a verify cache hit.
178 Do not update it with the verify result either.
180 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
181 when routing results in more than one destination address.
183 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
184 signing (which inhibits the cutthrough capability). Previously only
185 the presence of an option was tested; now an expansion evaluating as
186 empty is permissible (obviously it should depend only on data available
187 when the cutthrough connection is made).
189 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
190 the relevant preceding SMTP command did not note the pipelining mode.
192 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
193 Previously they were not counted.
195 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
196 as one having no matching records. Previously we deferred the message
197 that needed the lookup.
199 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
200 distinguished as "(=".
202 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
203 for missing MX records. Previously it only worked for missing A records.
205 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
207 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
208 after the data-go-ahead and data-ack. Patch from Jason Betts.
210 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
211 even for a "none" policy. Patch from Tony Meyer.
213 JH/22 Fix continued use of a connection for further deliveries. If a port was
214 specified by a router, it must also match for the delivery to be
217 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
218 When one of the recipients of a message was unsuitable for the connection
219 (has no matching addresses), we lost track of needing to mark it
220 deferred. As a result mail would be lost.
222 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
224 JH/25 Decoding ACL controls is now done using a binary search; the source code
225 takes up less space and should be simpler to maintain. Merge the ACL
226 condition decode tables also, with similar effect.
228 JH/26 Fix problem with one_time used on a redirect router which returned the
229 parent address unchanged. A retry would see the parent address marked as
230 delivered, so not attempt the (identical) child. As a result mail would
233 JH/27 Fix a possible security hole, wherein a process operating with the Exim
234 UID can gain a root shell. Credit to http://www.halfdog.net/ for
235 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
238 JH/28 Enable {spool,log} filesystem space and inode checks as default.
239 Main config options check_{log,spool}_{inodes,space} are now
240 100 inodes, 10MB unless set otherwise in the configuration.
242 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
243 Previously it only applied to the main-section connection policy
246 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
248 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
249 by me. Added RFC7919 DH primes as an alternative.
251 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
252 are not in the system include path.
254 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
255 GnuTLS, when a session startup failed (eg because the client disconnected)
256 Exim did stdio operations after fclose. This was exposed by a recent
257 change which nulled out the file handle after the fclose.
259 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
260 signed directly by the cert-signing cert, rather than an intermediate
261 OCSP-signing cert. This is the model used by LetsEncrypt.
263 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
265 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
266 an incoming connection.
268 HS/02 Bug 1802: Do not half-close the connection after sending a request
271 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
272 fallback to "prime256v1".
274 JH/34 SECURITY: Use proper copy of DATA command in error message.
275 Could leak key material. Remotely exploitable. CVE-2016-9963.
281 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
282 and 3.4.4 - once the server is enabled to respond to an OCSP request
283 it does even when not requested, resulting in a stapling non-aware
284 client dropping the TLS connection.
286 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
287 support variable-length bit vectors. No functional change.
289 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
290 The I= interface field on outgoing lines is now after the H= remote
291 host field, same as incoming lines. There is a separate
292 outgoing_interface log selector which allows you to disable the
295 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
296 If not running log_selector +smtp_connection the mainlog would be held
297 open indefinitely after a "too many connections" event, including to a
298 deleted file after a log rotate. Leave the per net connection logging
299 leaving it open for efficiency as that will be quickly detected by the
300 check on the next write.
302 HS/01 Bug 1671: Fix post transport crash.
303 Processing the wait-<transport> messages could crash the delivery
304 process if the message IDs didn't exist for some reason. When
305 using 'split_spool_directory=yes' the construction of the spool
306 file name failed already, exposing the same netto behaviour.
308 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
309 mime_regex ACL conditions.
311 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
312 to DSN fail messages (bounces): remote IP, remote greeting, remote response
313 to HELO, local diagnostic string.
315 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
316 log line to debug. Even when configured with a tls authenticator many
317 client connections are expected to not authenticate in this way, so
318 an authenticate fail is not an error.
320 HS/02 Add the Exim version string to the process info. This way exiwhat
321 gives some more detail about the running daemon.
323 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
324 matter for fast-change records such as DNSBLs.
326 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
327 retry record, even if constant. There may be multiple transports with
328 different interface settings and the retry behaviour needs to be kept
331 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
333 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
335 JH/10 Bug 840: fix log_defer_output option of pipe transport
337 JH/11 Bug 830: use same host for all RCPTS of a message, even under
338 hosts_randomize. This matters a lot when combined with mua_wrapper.
340 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
341 ${quote_pgsql:<string>} operator.
343 JH/13 Bug 1708: avoid misaligned access in cached lookup.
345 JH/14 Change header file name for freeradius-client. Relevant if compiling
346 with Radius support; from the Gentoo tree and checked under Fedora.
348 JH/15 Bug 1712: Introduce $prdr_requested flag variable
350 JH/16 Bug 1714: Permit an empty string as expansion result for transport
351 option transport_filter, meaning no filtering.
353 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
355 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
356 defaults to "*" (all hosts). The variable is now available when not built
357 with TLS, default unset, mainly to enable keeping the testsuite sane.
358 If a server certificate is not supplied (via tls_certificate) an error is
359 logged, and clients will find TLS connections fail on startup. Presumably
360 they will retry in-clear.
361 Packagers of Exim are strongly encouraged to create a server certificate
362 at installation time.
364 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
365 with the $config_file variable.
367 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
368 in transport context, after the attempt, and per-recipient. The latter type
369 is per host attempted. The event data is the error message, and the errno
370 information encodes the lookup type (A vs. MX) used for the (first) host,
371 and the trailing two digits of the smtp 4xx response.
373 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
374 to write to mainlog (or rejectlog, paniclog) in the window between file
375 creation and permissions/ownership being changed. Particularly affects
376 installations where exicyclog is run as root, rather than exim user;
377 result is that the running daemon panics and dies.
379 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
381 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
382 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
383 "pri" and "weight". Note that the previous implicit priority given by the
384 list order is no longer honoured.
386 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
389 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
390 by defining SUPPORT_SOCKS.
392 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
393 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
394 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
395 variables are renamed to proxy_{local,external}_{address,port}.
397 JH/27 Move Internationalisation support from Experimental to mainline, enabled
398 for a build by defining SUPPORT_I18N
400 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
401 of the query string, and make ${quote_redis:} do that quoting.
403 JH/29 Move Events support from Experimental to mainline, enabled by default
404 and removable for a build by defining DISABLE_EVENT.
406 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
408 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
409 cached by the daemon.
411 JH/32 Move Redis support from Experimental to mainline, enabled for a build
412 by defining LOOKUP_REDIS. The libhiredis library is required.
414 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
415 keys are given for lookup.
417 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
418 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
419 only supported when built with TLS support. The PolarSSL SHA routines
420 are still used when the TLS library is too old for convenient support.
422 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
423 openssl_options), for security. OpenSSL forces this from version 1.1.0
424 server-side so match that on older versions.
426 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
427 allocation for $value could be released as the expansion processing
428 concluded, but leaving the global pointer active for it.
430 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
431 and to use the domains and local_parts ACL conditions.
433 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
434 incorrectly not doubled on cutthrough transmission, hence seen as a
435 body-termination at the receiving system - resulting in truncated mails.
436 Commonly the sender saw a TCP-level error, and retransmitted the message
437 via the normal store-and-forward channel. This could result in duplicates
438 received - but deduplicating mailstores were liable to retain only the
439 initial truncated version.
441 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
443 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
445 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
446 we're in there, support oversigning also; bug 1309.
448 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
450 HS/04 Add support for keep_environment and add_environment options.
452 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
453 either intentional arithmetic overflow during PRNG, or testing config-
456 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
457 delivery resulted in actual delivery. Cancel cutthrough before DATA
460 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
461 rejects a recipient: pass the reject to the originator.
463 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
464 Many were false-positives and ignorable, but it's worth fixing the
467 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
468 for the new environment-manipulation done at startup. Move the routines
469 from being local to tls.c to being global via the os.c file.
471 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
472 an extract embedded as result-arg for a map, the first arg for extract
473 is unavailable so we cannot tell if this is a numbered or keyed
474 extraction. Accept either.
480 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
483 JH/02 The smtp transport option "multi_domain" is now expanded.
485 JH/03 The smtp transport now requests PRDR by default, if the server offers
488 JH/04 Certificate name checking on server certificates, when exim is a client,
489 is now done by default. The transport option tls_verify_cert_hostnames
490 can be used to disable this per-host. The build option
491 EXPERIMENTAL_CERTNAMES is withdrawn.
493 JH/05 The value of the tls_verify_certificates smtp transport and main options
494 default to the word "system" to access the system default CA bundle.
495 For GnuTLS, only version 3.0.20 or later.
497 JH/06 Verification of the server certificate for a TLS connection is now tried
498 (but not required) by default. The verification status is now logged by
499 default, for both outbound TLS and client-certificate supplying inbound
502 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
505 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
506 Status Notification (bounce) messages are now MIME format per RFC 3464.
507 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
508 under the control of the dsn_advertise_hosts option, and routers may
509 have a dsn_lasthop option.
511 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
512 default, modifiable by a malware= option. The list separator for
513 the options can now be changed in the usual way. Bug 68.
515 JH/10 The smtp_receive_timeout main option is now expanded before use.
517 JH/11 The incoming_interface log option now also enables logging of the
518 local interface on delivery outgoing connections.
520 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
521 if the interface and destination host and port all match.
523 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
526 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
527 Patch from Andrew Lewis.
529 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
530 now supports optional time-restrictions, weighting, and priority
531 modifiers per server. Patch originally by <rommer@active.by>.
533 JH/16 The spamd_address main option now supports a mixed list of local
534 and remote servers. Remote servers can be IPv6 addresses, and
535 specify a port-range.
537 JH/17 Bug 68: The spamd_address main option now supports an optional
538 timeout value per server.
540 JH/18 Bug 1581: Router and transport options headers_add/remove can
541 now have the list separator specified.
543 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
546 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
549 JH/21 Support for the A6 type of dns record is withdrawn.
551 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
552 rather than the verbs used.
554 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
555 from 255 to 1024 chars.
557 JH/24 Verification callouts now attempt to use TLS by default.
559 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
560 are generic router options now. The defaults didn't change.
562 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
563 Original patch from Alexander Shikoff, worked over by JH.
565 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
566 files if ZCAT_COMMAND is not executable.
568 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
570 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
572 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
573 Normally benign, it bites when the pair was led to by a CNAME;
574 modern usage is to not canonicalize the domain to a CNAME target
575 (and we were inconsistent anyway for A-only vs AAAA+A).
577 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
579 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
580 when evaluating $sender_host_dnssec.
582 JH/31 Check the HELO verification lookup for DNSSEC, adding new
583 $sender_helo_dnssec variable.
585 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
587 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
589 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
591 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
592 documented as working, but never had. Support all but $spam_report.
594 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
595 added for tls authenticator.
597 HS/03 Add perl_taintmode main config option
603 TL/01 When running the test suite, the README says that variables such as
604 no_msglog_check are global and can be placed anywhere in a specific
605 test's script, however it was observed that placement needed to be near
606 the beginning for it to behave that way. Changed the runtest perl
607 script to read through the entire script once to detect and set these
608 variables, reset to the beginning of the script, and then run through
609 the script parsing/test process like normal.
611 TL/02 The BSD's have an arc4random API. One of the functions to induce
612 adding randomness was arc4random_stir(), but it has been removed in
613 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
614 function when detected.
616 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
617 cause callback expansion.
619 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
620 syntax errors in an expansion can be treated as a string instead of
621 logging or causing an error, due to the internal use of bool_lax
622 instead of bool when processing it.
624 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
625 server certificates when making smtp deliveries.
627 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
629 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
631 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
633 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
634 Merged patch from Sebastian Wiedenroth.
636 JH/05 Fix results-pipe from transport process. Several recipients, combined
637 with certificate use, exposed issues where response data items split
638 over buffer boundaries were not parsed properly. This eventually
639 resulted in duplicates being sent. This issue only became common enough
640 to notice due to the introduction of connection certificate information,
641 the item size being so much larger. Found and fixed by Wolfgang Breyha.
643 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
644 size buffer was used, resulting in syntax errors when an expansion
647 JH/07 Add support for directories of certificates when compiled with a GnuTLS
648 version 3.3.6 or later.
650 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
651 is EXPERIMENTAL_EVENT, the main-configuration and transport options
652 both become "event_action", the variables become $event_name, $event_data
653 and $event_defer_errno. There is a new variable $verify_mode, usable in
654 routers, transports and related events. The tls:cert event is now also
655 raised for inbound connections, if the main configuration event_action
658 TL/06 In test suite, disable OCSP for old versions of openssl which contained
659 early OCSP support, but no stapling (appears to be less than 1.0.0).
661 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
662 server certificate names available under the smtp transport option
663 "tls_verify_cert_hostname" now do not permit multi-component wildcard
666 JH/10 Time-related extraction expansions from certificates now use the main
667 option "timezone" setting for output formatting, and are consistent
668 between OpenSSL and GnuTLS compilations. Bug 1541.
670 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
671 encoded parameter in the incoming message. Bug 1558.
673 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
674 include certificate info, eximon was claiming there were spoolfile
677 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
679 JH/14 Log delivery-related information more consistently, using the sequence
680 "H=<name> [<ip>]" wherever possible.
682 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
683 are problematic for Debian distribution, omit them from the release
686 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
688 JH/16 Fix string representation of time values on 64bit time_t architectures.
691 JH/17 Fix a null-indirection in certextract expansions when a nondefault
692 output list separator was used.
697 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
698 checkers that were complaining about end of non-void function with no
701 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
702 This was a regression introduced in 4.83 by another bugfix.
704 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
706 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
707 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
713 TF/01 Correctly close the server side of TLS when forking for delivery.
715 When a message was received over SMTP with TLS, Exim failed to clear up
716 the incoming connection properly after forking off the child process to
717 deliver the message. In some situations the subsequent outgoing
718 delivery connection happened to have the same fd number as the incoming
719 connection previously had. Exim would try to use TLS and fail, logging
720 a "Bad file descriptor" error.
722 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
723 utilities have not been installed.
725 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
726 temporary space as the ACL may create new global variables.
728 TL/01 LDAP support uses per connection or global context settings, depending
729 upon the detected version of the libraries at build time.
731 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
732 to extract and use the src ip:port in logging and expansions as if it
733 were a direct connection from the outside internet. PPv2 support was
734 updated based on HAProxy spec change in May 2014.
736 JH/02 Add ${listextract {number}{list}{success}{fail}}.
738 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
739 Properly escape header and check for NULL return.
741 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
744 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
746 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
747 characters in header names, implemented as a verify condition.
748 Contributed by Michael Fischer v. Mollard.
750 TL/05 Rename SPF condition results err_perm and err_temp to standardized
751 results permerror and temperror. Previous values are deprecated but
752 still accepted. In a future release, err_perm and err_temp will be
753 completely removed, which will be a backward incompatibility if the
754 ACL tests for either of these two old results. Patch contributed by
755 user bes-internal on the mailing list.
757 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
759 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
760 selectors, in both main and reject logs.
762 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
765 JH/07 Add malware type "sock" for talking to simple daemon.
767 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
769 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
770 routers/transports under cutthrough routing.
772 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
773 numbers. Touch up "bool" conditional to keep the same definition.
775 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
777 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
779 JH/12 Expand items in router/transport headers_add or headers_remove lists
780 individually rather than the list as a whole. Bug 1452.
782 Required for reasonable handling of multiple headers_ options when
783 they may be empty; requires that headers_remove items with embedded
784 colons must have them doubled (or the list-separator changed).
786 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
787 view the policy declared in the DMARC record. Currently, $dmarc_status
788 is a combined value of both the record presence and the result of the
791 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
793 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
794 dnslookup router and the smtp transport (applying to the forward
797 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
798 of ldap servers used for a specific lookup. Patch provided by Heiko
801 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
802 New variable $lookup_dnssec_authenticated for observability.
804 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
805 Patch submitted by Lars Timman.
807 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
809 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
810 Requires trusted mode and valid format message id, aborts otherwise.
811 Patch contributed by Heiko Schlichting.
813 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
814 certextract with support for various fields. Bug 1358.
816 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
817 is requested by default, modifiable by smtp transport option
820 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
821 operate on certificate variables to give certificate fingerprints
822 Also new ${sha256:cert_variable}.
824 JH/23 The PRDR feature is moved from being Experimental into the mainline.
826 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
827 Christian Aistleitner.
829 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
831 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
832 file. Patch from Wolfgang Breyha.
834 JH/25 Expand the coverage of the delivery $host and $host_address to
835 client authenticators run in verify callout. Bug 1476.
837 JH/26 Port service names are now accepted for tls_on_connect_ports, to
838 align with daemon_smtp_ports. Bug 72.
840 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
841 support and error reporting did not work properly.
843 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
844 and is readable. Patch from Andrew Colin Kissa.
846 TL/14 Enhance documentation of ${run expansion and how it parses the
847 commandline after expansion, particularly in the case when an
848 unquoted variable expansion results in an empty value.
850 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
852 PP/02 Fix internal collision of T_APL on systems which support RFC3123
853 by renaming away from it. Addresses GH issue 15, reported by
856 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
858 TL/15 SECURITY: prevent double expansion in math comparison functions
859 (can expand unsanitized data). Not remotely exploitable.
866 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
868 PP/02 Make -n do something, by making it not do something.
869 When combined with -bP, the name of an option is not output.
871 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
874 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
875 $sender_host_name and config options to manage this, and basic check
878 PP/05 DSCP support for outbound connections and control modifier for inbound.
880 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
881 (Only plugin which currently uses this is kerberos4, which nobody should
882 be using, but we should make it available and other future plugins might
883 conceivably use it, even though it would break NAT; stuff *should* be
884 using channel bindings instead).
886 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
887 name; added for Sendmail compatibility; requires admin caller.
888 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
889 just ignore it); requires trusted caller.
890 Also parse but ignore: -Ac -Am -X<logfile>
893 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
895 TL/02 Add +smtp_confirmation as a default logging option.
897 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
898 Patch by Magnus Holmgren from 2007-02-20.
900 TL/04 Bugzilla 1281 - Spec typo.
901 Bugzilla 1283 - Spec typo.
902 Bugzilla 1290 - Spec grammar fixes.
904 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
906 TL/06 Add Experimental DMARC support using libopendmarc libraries.
908 TL/07 Fix an out of order global option causing a segfault. Reported to dev
909 mailing list by by Dmitry Isaikin.
911 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
913 JH/02 Support "G" suffix to numbers in ${if comparisons.
915 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
917 NM/01 Bugzilla 1197 - Spec typo
918 Bugzilla 1196 - Spec examples corrections
920 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
922 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
923 gnutls_enable_pkcs11, but renamed to more accurately indicate its
926 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
927 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
929 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
930 "acl {{name}{arg}...}", and optional args on acl condition
933 JH/05 Permit multiple router/transport headers_add/remove lines.
935 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
937 JH/07 Avoid using a waiting database for a single-message-only transport.
938 Performance patch from Paul Fisher. Bugzilla 1262.
940 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
943 JH/09 Add $headers_added variable, with content from use of ACL modifier
944 add_header (but not yet added to the message). Bugzilla 199.
946 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
947 Pulled from Bugzilla 817 by Wolfgang Breyha.
949 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
951 (nb: this is the same fix as in Exim 4.80.1)
953 JH/11 Add A= logging on delivery lines, and a client_set_id option on
956 JH/12 Add optional authenticated_sender logging to A= and a log_selector
959 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
961 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
962 advertise SMTP AUTH mechanism to us, instead of a generic
963 protocol violation error. Also, make Exim more robust to bad
964 data from the Dovecot auth socket.
966 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
968 When a queue runner is handling a message, Exim first routes the
969 recipient addresses, during which it prunes them based on the retry
970 hints database. After that it attempts to deliver the message to
971 any remaining recipients. It then updates the hints database using
974 So if a recipient address works intermittently, it can get repeatedly
975 deferred at routing time. The retry hints record remains fresh so the
976 address never reaches the final cutoff time.
978 This is a fairly common occurrence when a user is bumping up against
979 their storage quota. Exim had some logic in its local delivery code
980 to deal with this. However it did not apply to per-recipient defers
981 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
983 This change adds a proper retry rule check during routing so that the
984 final cutoff time is checked against the message's age. We only do
985 this check if there is an address retry record and there is not a
986 domain retry record; this implies that previous attempts to handle
987 the address had the retry_use_local_parts option turned on. We use
988 this as an approximation for the destination being like a local
989 delivery, as in LMTP.
991 I suspect this new check makes the old local delivery cutoff check
992 redundant, but I have not verified this so I left the code in place.
994 TF/02 Correct gecos expansion when From: is a prefix of the username.
996 Test 0254 submits a message to Exim with the header
1000 When I ran the test suite under the user fanf2, Exim expanded
1001 the header to contain my full name, whereas it should have added
1002 a Resent-Sender: header. It erroneously treats any prefix of the
1003 username as equal to the username.
1005 This change corrects that bug.
1007 GF/01 DCC debug and logging tidyup
1008 Error conditions log to paniclog rather than rejectlog.
1009 Debug lines prefixed by "DCC: " to remove any ambiguity.
1011 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1013 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1014 Bug spotted by Jeremy Harris; was flawed since initial commit.
1015 Would have resulted in OCSP responses post-SNI triggering an Exim
1016 NULL dereference and crash.
1018 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1020 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1021 Bug detection, analysis and fix by Samuel Thibault.
1022 Bugzilla 1331, Debian bug #698092.
1024 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1026 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1027 Server implementation by Todd Lyons, client by JH.
1028 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1029 config variable "prdr_enable" controls whether the server
1030 advertises the facility. If the client requests PRDR a new
1031 acl_data_smtp_prdr ACL is called once for each recipient, after
1032 the body content is received and before the acl_smtp_data ACL.
1033 The client is controlled by both of: a hosts_try_prdr option
1034 on the smtp transport, and the server advertisement.
1035 Default client logging of deliveries and rejections involving
1036 PRDR are flagged with the string "PRDR".
1038 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1039 fclose(). Diagnosis by Todd Lyons.
1041 PP/17 Update configure.default to handle IPv6 localhost better.
1042 Patch by Alain Williams (plus minor tweaks).
1045 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1046 This is now consistent with GnuTLS, and is now documented: the
1047 previous undocumented portable approach to treating the option as
1048 unset was to force an expansion failure. That still works, and
1049 an empty string is now equivalent.
1051 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1052 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1053 not performing validation itself.
1055 PP/20 Added force_command boolean option to pipe transport.
1056 Patch from Nick Koston, of cPanel Inc.
1058 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1061 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1063 PP/21 Fix eximon continuous updating with timestamped log-files.
1064 Broken in a format-string cleanup in 4.80, missed when I repaired the
1065 other false fix of the same issue.
1066 Report and fix from Heiko Schlichting.
1069 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1070 Report from Prashanth Katuri.
1072 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1073 It's SecureTransport, so affects any MacOS clients which use the
1074 system-integrated TLS libraries, including email clients.
1076 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1077 using a MIME ACL for non-SMTP local injection.
1078 Report and assistance in diagnosis by Warren Baker.
1080 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1082 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1084 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1085 last id that failed so it may be referenced in subsequent ACL's.
1087 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1090 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1091 ldap library initialization, allowing self-signed CA's to be
1092 used. Also properly sets require_cert option later in code by
1093 using NULL (global ldap config) instead of ldap handle (per
1094 session). Bug diagnosis and testing by alxgomz.
1096 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1097 the src/util/ subdirectory.
1099 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1100 renamed to Transport Post Delivery Action by Jeremy Harris, as
1103 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1104 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1105 redis_servers = needs to be configured which will be used by the redis
1106 lookup. Patch from Warren Baker, of The Packet Hub.
1108 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1110 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1111 hostname or reverse DNS when processing a host list. Used suggestions
1112 from multiple comments on this bug.
1114 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1116 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1117 Missed a few lines, added it to make the runtest require no keyboard
1120 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1121 contains upper case chars. Make router use caseful_local_part.
1123 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1124 support when GnuTLS has been built with p11-kit.
1130 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1132 This, or similar/improved, will also be change PP/11 of 4.82.
1138 PP/01 Handle short writes when writing local log-files.
1139 In practice, only affects FreeBSD (8 onwards).
1140 Bugzilla 1053, with thanks to Dmitry Isaikin.
1142 NM/01 Bugzilla 949 - Documentation tweak
1144 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1147 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1149 PP/02 Implemented gsasl authenticator.
1151 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1153 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1154 `pkg-config foo` for cflags/libs.
1156 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1157 with rest of GSASL and with heimdal_gssapi.
1159 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1160 `pkg-config foo` for cflags/libs for the TLS implementation.
1162 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1163 properties get this fed in as external SSF. A number of robustness
1164 and debugging improvements to the cyrus_sasl authenticator.
1166 PP/08 cyrus_sasl server now expands the server_realm option.
1168 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1169 Patch by Jeremy Harris.
1171 PP/10 Added dbmjz lookup type.
1173 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1175 PP/12 MAIL args handles TAB as well as SP, for better interop with
1176 non-compliant senders.
1177 Analysis and variant patch by Todd Lyons.
1179 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1180 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1181 Patch from Dirk Mueller <dmueller@suse.com>
1183 PP/13 tls_peerdn now print-escaped for spool files.
1184 Observed some $tls_peerdn in wild which contained \n, which resulted
1185 in spool file corruption.
1187 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1188 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1189 or write after TLS renegotiation, which otherwise led to messages
1192 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1193 as a tracking header (ie: a signed header comes before the signature).
1194 Patch from Wolfgang Breyha.
1196 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1197 comma-sep list; embedded commas doubled.
1199 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1201 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1203 Report and patch from Dmitry Banschikov.
1205 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1206 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1207 failures. We appear to now support TLS1.1+ with Exim.
1209 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1210 lets Exim select keys and certificates based upon TLS SNI from client.
1211 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1212 before an outbound SMTP session. New log_selector, +tls_sni.
1214 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1215 NULL dereference. Report and patch from Alun Jones.
1217 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1218 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1219 Not seeing resolver debug output on NetBSD, but suspect this is a
1220 resolver implementation change.
1222 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1223 Left warnings. Added "eximon gdb" invocation mode.
1225 PP/21 Defaulting "accept_8bitmime" to true, not false.
1227 PP/22 Added -bw for inetd wait mode support.
1229 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1230 locate the relevant includes and libraries. Made this the default.
1232 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1233 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1235 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1236 This may cause build issues on older platforms.
1238 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1239 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1240 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1241 Added SNI support via GnuTLS too.
1242 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1244 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1246 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1247 Applied second patch from Janne, implementing suggestion to default
1248 multiple-strings-in-record handling to match SPF spec.
1250 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1252 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1253 read-only, out of scope).
1254 Patch from Wolfgang Breyha, report from Stuart Northfield.
1256 PP/29 Fix three issues highlighted by clang analyser static analysis.
1257 Only crash-plausible issue would require the Cambridge-specific
1258 iplookup router and a misconfiguration.
1259 Report from Marcin Mirosław.
1261 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1263 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1264 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1265 As part of this, removing so much warning spew let me fix some minor
1266 real issues in debug logging.
1268 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1269 assignment on my part. Fixed.
1271 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1272 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1273 Janne Snabb (who went above and beyond: thank you).
1275 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1276 string otherwise requires a connection and a bunch more work and it's
1277 relatively easy to get wrong. Should also expose TLS library linkage
1280 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1281 64-bit ${eval} (JH/03).
1283 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1284 GNU libc to support some of the 64-bit stuff, should not lead to
1285 conflicts. Defined before os.h is pulled in, so if a given platform
1286 needs to override this, it can.
1288 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1289 protection layer was required, which is not implemented.
1290 Bugzilla 1254, patch from Wolfgang Breyha.
1292 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1293 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1294 tls_dhparam take prime identifiers. Also unbreak combination of
1295 OpenSSL+DH_params+TLSSNI.
1297 PP/39 Disable SSLv2 by default in OpenSSL support.
1303 PP/01 Solaris build fix for Oracle's LDAP libraries.
1304 Bugzilla 1109, patch from Stephen Usher.
1306 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1308 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1311 TF/02 Fix a couple more cases where we did not log the error message
1312 when unlink() failed. See also change 4.74-TF/03.
1314 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1315 lock up or crash if it happened to be inside a call to libc when it
1316 got a SIGUSR1 from exiwhat.
1318 The SIGUSR1 handler appends the current process status to the process
1319 log which is later printed by exiwhat. It used to use the general
1320 purpose logging code to do this, but several functions it calls are
1321 not safe for signals.
1323 The new output code in the SIGUSR1 handler is specific to the process
1324 log, and simple enough that it's easy to inspect for signal safety.
1325 Removing some special cases also simplifies the general logging code.
1326 Removing the spurious timestamps from the process log simplifies
1329 TF/04 Improved ratelimit ACL condition.
1331 The /noupdate option has been deprecated in favour of /readonly which
1332 has clearer semantics. The /leaky, /strict, and /readonly update modes
1333 are mutually exclusive. The update mode is no longer included in the
1334 database key; it just determines when the database is updated. (This
1335 means that when you upgrade Exim will forget old rate measurements.)
1337 Exim now checks that the per_* options are used with an update mode that
1338 makes sense for the current ACL. For example, when Exim is processing a
1339 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1340 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1341 must specify per_mail/readonly. If you omit the update mode it defaults to
1342 /leaky where that makes sense (as before) or /readonly where required.
1344 The /noupdate option is now undocumented but still supported for
1345 backwards compatibility. It is equivalent to /readonly except that in
1346 ACLs where /readonly is required you may specify /leaky/noupdate or
1347 /strict/noupdate which are treated the same as /readonly.
1349 A useful new feature is the /count= option. This is a generalization
1350 of the per_byte option, so that you can measure the throughput of other
1351 aggregate values. For example, the per_byte option is now equivalent
1352 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1354 The per_rcpt option has been generalized using the /count= mechanism
1355 (though it's more complicated than the per_byte equivalence). When it is
1356 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1357 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1358 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1359 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1360 Note that using per_rcpt with a non-readonly update mode in more than
1361 one ACL will cause the recipients to be double-counted. (The per_mail
1362 and per_byte options don't have this problem.)
1364 The handling of very low rates has changed slightly. If the computed rate
1365 is less than the event's count (usually one) then this event is the first
1366 after a long gap. In this case the rate is set to the same as this event's
1367 count, so that the first message of a spam run is counted properly.
1369 The major new feature is a mechanism for counting the rate of unique
1370 events. The new per_addr option counts the number of different
1371 recipients that someone has sent messages to in the last time period. It
1372 behaves like per_rcpt if all the recipient addresses are different, but
1373 duplicate recipient addresses do not increase the measured rate. Like
1374 the /count= option this is a general mechanism, so the per_addr option
1375 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1376 example, measure the rate that a client uses different sender addresses
1377 with the options per_mail/unique=$sender_address. There are further
1378 details in the main documentation.
1380 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1382 TF/06 Removed a few PCRE remnants.
1384 TF/07 Automatically extract Exim's version number from tags in the git
1385 repository when doing development or release builds.
1387 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1388 Bugzilla 879. Patch from Paul Fisher.
1390 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1391 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1394 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1396 PP/05 Variable $av_failed, true if the AV scanner deferred.
1397 Bugzilla 1078. Patch from John Horne.
1399 PP/06 Stop make process more reliably on build failure.
1400 Bugzilla 1087. Patch from Heiko Schlittermann.
1402 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1403 Bugzilla 1089. Patch from Heiko Schlittermann.
1405 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1406 Bugzilla 1131. Patch from Holger Weiß.
1408 PP/09 Handle IPv6 addresses with SPF.
1409 Bugzilla 860. Patch from Wolfgang Breyha.
1411 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1413 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1416 PP/11 match_* no longer expand right-hand-side by default.
1417 New compile-time build option, EXPAND_LISTMATCH_RHS.
1418 New expansion conditions, "inlist", "inlisti".
1420 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1422 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1424 PP/14 fix log_write() format string regression from TF/03.
1425 Bugzilla 1152. Patch from Dmitry Isaikin.
1431 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1433 PP/02 Harmonised TLS library version reporting; only show if debugging.
1434 Layout now matches that introduced for other libraries in 4.74 PP/03.
1436 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1438 PP/04 New "dns_use_edns0" global option.
1440 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1443 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1444 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1446 TK/01 Updated PolarSSL code to 0.14.2.
1447 Bugzilla 1097. Patch from Andreas Metzler.
1449 PP/07 Catch divide-by-zero in ${eval:...}.
1450 Fixes bugzilla 1102.
1452 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1455 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1456 format-string attack -- SECURITY: remote arbitrary code execution.
1458 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1459 time unintentionally subject to list matching rules, letting the header
1460 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1461 arbitrary string expansion). This allowed for information disclosure.
1463 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1464 INT_MIN/-1 -- value coerced to INT_MAX.
1470 NM/01 Workaround for PCRE version dependency in version reporting
1473 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1474 This fixes portability to compilers other than gcc, notably
1475 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1477 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1478 makefiles for portability to HP-UX and POSIX correctness.
1480 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1481 Also via indented variable definition in the Makefile.
1482 (Debugging by Oliver Heesakkers).
1484 PP/02 Restore caching of spamd results with expanded spamd_address.
1485 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1487 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1488 Improves build reliability. Fix from: Frank Elsner
1490 NM/02 Fix wide character breakage in the rfc2047 coding
1491 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1493 NM/03 Allow underscore in dnslist lookups
1494 Fixes bug 1026. Patch from Graeme Fowler
1496 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1497 Code patches from Adam Ciarcinski of NetBSD.
1499 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1502 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1503 is logged, to avoid truncation. Patch from John Horne.
1505 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1506 Patch from Jakob Hirsch.
1508 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1509 SQL string expansion failure details.
1510 Patch from Andrey Oktyabrski.
1512 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1513 Patch from Simon Arlott.
1515 PP/09 New lookups functionality failed to compile on old gcc which rejects
1516 extern declarations in function scope.
1517 Patch from Oliver Fleischmann
1519 PP/10 Use sig_atomic_t for flags set from signal handlers.
1520 Check getgroups() return and improve debugging.
1521 Fixed developed for diagnosis in bug 927 (which turned out to be
1524 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1525 Patch from Mark Zealey.
1527 PP/12 Bugzilla 1056: Improved spamd server selection.
1528 Patch from Mark Zealey.
1530 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1531 Based on patch from Heiko Schlittermann.
1533 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1534 Patch from Uwe Doering, sign-off by Michael Haardt.
1536 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1537 variable declaration deep within a block. Bug and patch from
1540 PP/15 lookups-Makefile IRIX compatibility coercion.
1542 PP/16 Make DISABLE_DKIM build knob functional.
1544 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1545 Patch by Simon Arlott
1547 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1548 variable argument macros. Our copy now differs from upstream.
1554 TF/01 Failure to get a lock on a hints database can have serious
1555 consequences so log it to the panic log.
1557 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1558 controlled using the smtp_confirmation log selector.
1560 TF/03 Include the error message when we fail to unlink a spool file.
1562 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1563 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1564 for maintaining out-of-tree patches for some time.
1566 PP/01 Bugzilla 139: Documentation and portability issues.
1567 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1568 Handle per-OS dynamic-module compilation flags.
1570 PP/02 Let /dev/null have normal permissions.
1571 The 4.73 fixes were a little too stringent and complained about the
1572 permissions on /dev/null. Exempt it from some checks.
1573 Reported by Andreas M. Kirchwitz.
1575 PP/03 Report version information for many libraries, including
1576 Exim version information for dynamically loaded libraries. Created
1577 version.h, now support a version extension string for distributors
1578 who patch heavily. Dynamic module ABI change.
1580 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1581 privilege escalation vulnerability whereby the Exim run-time user
1582 can cause root to append content of the attacker's choosing to
1585 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1588 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1589 If dropping privileges for untrusted macros, we disabled normal logging
1590 on the basis that it would fail; for the Exim run-time user, this is not
1591 the case, and it resulted in successful deliveries going unlogged.
1592 Fixed. Reported by Andreas Metzler.
1598 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1599 only prepend for the Resent-* case. Fixes regression introduced in
1600 Exim 4.70 by NM/22 for Bugzilla 607.
1602 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1603 increasing numbers of administrators be bitten by this.
1605 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1607 PP/03 Bugzilla 994: added openssl_options main configuration option.
1609 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1611 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1613 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1615 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1616 without a peer certificate, leading to a segfault because of an
1617 assumption that peers always have certificates. Be a little more
1618 paranoid. Problem reported by Martin Tscholak.
1620 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1621 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1622 NB: ClamAV planning to remove STREAM in "middle of 2010".
1623 CL also introduces -bmalware, various -d+acl logging additions and
1624 more caution in buffer sizes.
1626 PP/09 Implemented reverse_ip expansion operator.
1628 PP/10 Bugzilla 937: provide a "debug" ACL control.
1630 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1632 PP/12 Bugzilla 973: Implement --version.
1634 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1636 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1638 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1640 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1641 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1642 ignore trailing whitespace.
1644 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1646 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1649 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1650 Notification from Dr Andrew Aitchison.
1652 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1653 ExtendedDetectionInfo response format.
1654 Notification from John Horne.
1656 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1659 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1660 XSL and documented dependency on system catalogs, with examples of how
1663 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1666 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1667 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1668 configuration file which is writeable by the Exim user or group.
1670 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1671 of configuration files to cover files specified with the -C option if
1672 they are going to be used with root privileges, not just the default
1675 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1676 option (effectively making it always true).
1678 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1679 files to be used while preserving root privileges.
1681 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1682 that rogue child processes cannot use them.
1684 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1685 run-time user, instead of root.
1687 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1688 Exim run-time user without dropping privileges.
1690 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1691 result string, instead of calling string_vformat() twice with the same
1694 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1695 for other users. Others should always drop root privileges if they use
1696 -C on the command line, even for a whitelisted configure file.
1698 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1700 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1706 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1707 $data_path, and $header_path variables; fixed documentation bugs and
1710 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1711 exipick to access non-standard spools, including the "frozen" queue
1714 NM/01 Bugzilla 965: Support mysql stored procedures.
1715 Patch from Alain Williams
1717 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1719 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1720 Patch from Andreas Metzler
1722 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1723 Patch from Kirill Miazine
1725 NM/05 Bugzilla 671: Added umask to procmail example.
1727 JJ/03 installed exipick 20100323.0, fixing doc bug
1729 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1730 directory. Notification and patch from Dan Rosenberg.
1732 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1734 TK/02 Improve log output when DKIM signing operation fails.
1736 MH/01 Treat the transport option dkim_domain as a colon separated
1737 list, not as a single string, and sign the message with each element,
1738 omitting multiple occurences of the same signer.
1740 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1741 Bugzilla 985, 986. Patch by Simon Arlott
1743 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1744 Patch by Simon Arlott
1746 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1747 MBX locking. Notification from Dan Rosenberg.
1753 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1755 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1757 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1759 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1761 NM/04 Bugzilla 915: Flag broken perl installation during build.
1767 TK/01 Added patch by Johannes Berg that expands the main option
1768 "spamd_address" if it starts with a dollar sign.
1770 TK/02 Write list of recipients to X-Envelope-Sender header when building
1771 the mbox-format spool file for content scanning (suggested by Jakob
1774 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1775 (http://www.dcc-servers.net/) support via dccifd. Activated by
1776 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1778 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1779 by Mark Daniel Reidel <mr@df.eu>.
1781 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1782 When building exim an external PCRE library is now needed -
1783 PCRE is a system library on the majority of modern systems.
1784 See entry on PCRE_LIBS in EDITME file.
1786 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1787 conversation. Added nologin parameter to request.
1788 Patch contributed by Kirill Miazine.
1790 TF/01 Do not log submission mode rewrites if they do not change the address.
1792 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1794 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1795 log files in place. Contributed by Roberto Lima.
1797 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1799 TF/03 Bugzilla 615: When checking the local_parts router precondition
1800 after a local_part_suffix or local_part_prefix option, Exim now
1801 does not use the address's named list lookup cache, since this
1802 contains cached lookups for the whole local part.
1804 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1805 Robert Millan. Documentation is in experimental-spec.txt.
1807 TF/04 Bugzilla 668: Fix parallel build (make -j).
1809 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1811 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1812 Patch provided by Jan Srzednicki.
1814 TF/05 Leading white space used to be stripped from $spam_report which
1815 wrecked the formatting. Now it is preserved.
1817 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1818 that they are available at delivery time.
1820 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1822 TF/08 TLS error reporting now respects the incoming_interface and
1823 incoming_port log selectors.
1825 TF/09 Produce a more useful error message if an SMTP transport's hosts
1826 setting expands to an empty string.
1828 NM/06 Bugzilla 744: EXPN did not work under TLS.
1829 Patch provided by Phil Pennock.
1831 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1832 Patch provided by Richard Godbee.
1834 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1835 acl_smtp_notquit, added index entry.
1837 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1838 Patch provided by Eugene Bujak.
1840 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1841 accept(). Patch provided by Maxim Dounin.
1843 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1844 Patch provided by Phil Pennock.
1846 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1848 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1849 Patch provided by Brad "anomie" Jorsch.
1851 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1852 Patch provided by Dean Brooks.
1854 TK/05 Add native DKIM support (does not depend on external libraries).
1856 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1857 Patch provided by Graeme Fowler.
1859 NM/16 Bugzilla 851: Documentation example syntax fix.
1861 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1863 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1866 NM/19 Bugzilla 745: TLS version reporting.
1867 Patch provided by Phil Pennock.
1869 NM/20 Bugzilla 167: bool: condition support.
1870 Patch provided by Phil Pennock.
1872 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1873 clients. Patch provided by Phil Pennock.
1875 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1876 Patch provided by Brad "anomie" Jorsch.
1878 NM/23 Bugzilla 687: Fix misparses in eximstats.
1879 Patch provided by Heiko Schlittermann.
1881 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1882 Patch provided by Heiko Schlittermann.
1884 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1885 plus update to original patch.
1887 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1889 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1890 Patch provided by David Brownlee.
1892 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1894 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1896 NM/30 Bugzilla 888: TLS documentation bugfixes.
1898 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1900 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1901 Unlike the original bugzilla I have changed all shell scripts in src tree.
1903 NM/33 Bugzilla 898: Transport filter timeout fix.
1904 Patch by Todd Rinaldo.
1906 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1907 Patch by Serge Demonchaux.
1909 NM/35 Bugzilla 39: Base64 decode bug fixes.
1910 Patch by Jakob Hirsch.
1912 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1914 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1916 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1918 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1924 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1925 ALT-N's libdkim that I have put here:
1926 http://duncanthrax.net/exim-experimental/
1928 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1929 were called 'true' and it seems that C99 defines that as a reserved
1930 keyword to be used with 'bool' variable types. That means you could
1931 not include C99-style headers which use bools without triggering
1932 build errors in sieve.c.
1934 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1935 as mailq or other aliases. Changed the --help handling significantly
1936 to do whats expected. exim_usage() emits usage/help information.
1938 SC/01 Added the -bylocaldomain option to eximstats.
1940 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1942 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1944 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1950 PH/01 Another patch from the Sieve maintainer.
1952 PH/02 When an IPv6 address is converted to a string for single-key lookup
1953 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1954 dots are used instead of colons so that keys in lsearch files need not
1955 contain colons. This was done some time before quoting was made available
1956 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1957 (notated using the quote facility) so as to distinguish them from IPv4
1958 keys. This meant that lookups for IP addresses in host lists did not work
1959 for iplsearch lookups.
1961 This has been fixed by arranging for IPv6 addresses to be expressed with
1962 colons if the lookup type is iplsearch. This is not incompatible, because
1963 previously such lookups could never work.
1965 The situation is now rather anomalous, since one *can* have colons in
1966 ordinary lsearch keys. However, making the change in all cases is
1967 incompatible and would probably break a number of configurations.
1969 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1972 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1973 conversion specification without a maximum field width, thereby enabling
1974 a rogue spamd server to cause a buffer overflow. While nobody in their
1975 right mind would setup Exim to query an untrusted spamd server, an
1976 attacker that gains access to a server running spamd could potentially
1977 exploit this vulnerability to run arbitrary code as the Exim user.
1979 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1980 $primary_hostname instead of what libspf2 thinks the hosts name is.
1982 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1983 a directory entry by the name of the lookup key. Previously, if a
1984 symlink pointed to a non-existing file or a file in a directory that
1985 Exim lacked permissions to read, a lookup for a key matching that
1986 symlink would fail. Now it is enough that a matching directory entry
1987 exists, symlink or not. (Bugzilla 503.)
1989 PH/03 The body_linecount and body_zerocount variables are now exported in the
1992 PH/04 Added the $dnslist_matched variable.
1994 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1995 This means they are set thereafter only if the connection becomes
1998 PH/06 Added the client_condition to authenticators so that some can be skipped
1999 by clients under certain conditions.
2001 PH/07 The error message for a badly-placed control=no_multiline_responses left
2002 "_responses" off the end of the name.
2004 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2006 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2007 (without spaces) instead of just copying the configuration text.
2009 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2011 PH/11 Added $max_received_linelength.
2013 PH/12 Added +ignore_defer and +include_defer to host lists.
2015 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2016 way in which PCRE > 7.0 is built.
2018 PH/14 Implemented queue_only_load_latch.
2020 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2021 MAIL command. The effect was to mangle the value on 64-bit systems.
2023 PH/16 Another patch from the Sieve maintainer.
2025 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2027 PH/18 If a system quota error occurred while trying to create the file for
2028 a maildir delivery, the message "Mailbox is full" was not appended to the
2029 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2030 only to a quota excession during the actual writing of the file.
2032 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2033 characters?) which causes problems in log lines. The DN values are now
2034 passed through string_printing() before being added to log lines.
2036 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2037 and InterBase are left for another time.)
2039 PH/21 Added message_body_newlines option.
2041 PH/22 Guard against possible overflow in moan_check_errorcopy().
2043 PH/23 POSIX allows open() to be a macro; guard against that.
2045 PH/24 If the recipient of an error message contained an @ in the local part
2046 (suitably quoted, of course), incorrect values were put in $domain and
2047 $local_part during the evaluation of errors_copy.
2053 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2054 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2057 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2058 issue a MAIL command.
2060 PH/02 In an ACL statement such as
2062 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2064 if a client was not listed at all, or was listed with a value other than
2065 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2066 the condition was not true (as it should be), so access was not denied.
2067 The bug was that the ! inversion was incorrectly passed on to the second
2068 item. This has been fixed.
2070 PH/03 Added additional dnslists conditions == and =& which are different from
2071 = and & when the dns lookup returns more than one IP address.
2073 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2074 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2076 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2077 FSYNC, which compiles an option called disable_fsync that allows for
2078 bypassing fsync(). The documentation is heavily laced with warnings.
2080 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2082 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2083 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2084 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2085 including adding "make clean"; (3) Added -fPIC when compiling the test
2086 dynamically loaded module, to get rid of a warning.
2088 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2089 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2090 = 0s. The bug is otherwise harmless.
2092 PH/07 There was a bug in the dovecot authenticator such that the value of
2093 $auth1 could be overwritten, and so not correctly preserved, after a
2094 successful authentication. This usually meant that the value preserved by
2095 the server_setid option was incorrect.
2097 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2099 PH/09 Installed PCRE release 7.0.
2101 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2102 run for batched SMTP input. It is now run at the start of every message
2103 in the batch. While fixing this I discovered that the process information
2104 (output by running exiwhat) was not always getting set for -bs and -bS
2105 input. This is fixed, and it now also says "batched" for BSMTP.
2107 PH/11 Added control=no_pipelining.
2109 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2110 patch, slightly modified), and move the expansion of helo_data till after
2111 the connection is made in the smtp transport (so it can use these
2114 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2116 PH/14 Added log_selector = +pid.
2118 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2120 PH/16 Add ${if forany and ${if forall.
2122 PH/17 Added dsn_from option to vary the From: line in DSNs.
2124 PH/18 Flush SMTP output before performing a callout, unless control =
2125 no_callout_flush is set.
2127 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2128 was true (the default) a successful delivery failed to delete the retry
2129 item, thus causing premature timeout of the address. The bug is now
2132 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2134 PH/21 Long custom messages for fakedefer and fakereject are now split up
2135 into multiline responses in the same way that messages for "deny" and
2136 other ACL rejections are.
2138 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2139 with slight modification.
2141 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2142 draft, changing the syntax and factoring some duplicate code".
2144 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2145 for deliveries of the second and subsequent messages over the same SMTP
2148 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2149 ${reduce, with only minor "tidies".
2151 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2153 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2154 expansion side effects.
2156 PH/27 When a message times out after an over-quota error from an Exim-imposed
2157 quota, the bounce message says "mailbox is full". This message was not
2158 being given when it was a system quota that was exceeded. It now should
2161 MH/03 Made $recipients available in local_scan(). local_scan() already has
2162 better access to the recipient list through recipients_list[], but
2163 $recipients can be useful in postmaster-provided expansion strings.
2165 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2166 in the case of a MAIL command with additional options following the
2167 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2168 were accidentally chopped off.
2170 PH/29 SMTP synchronization checks are implemented when a command is read -
2171 there is a check that no more input is waiting when there shouldn't be
2172 any. However, for some commands, a delay in an ACL can mean that it is
2173 some time before the response is written. In this time, more input might
2174 arrive, invalidly. So now there are extra checks after an ACL has run for
2175 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2176 pipelining has not been advertised.
2178 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2180 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2181 returned in the SMTP response when smtp_return_error_details was false.
2182 This has been fixed.
2184 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2185 instead of the C I/O that was originally supplied, because problems were
2186 reported on Solaris.
2188 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2189 Exim which did not show up earlier: it was assuming that a call to
2190 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2191 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2192 was a macro that became an assignment, so it seemed to work. This has
2193 changed to a proper function call with a void return, hence the compile
2194 error. Exim's code has been fixed.
2196 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2199 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2201 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2203 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2204 because it turns out to be too big or there is a timeout) there is no
2205 "Completed" line in the log. When some messages of this type were
2206 selected by exigrep, they were listed as "not completed". Others were
2207 picked up by some special patterns. I have improved the selection
2208 criteria to be more general.
2210 PH/38 The host_find_failed option in the manualroute router can now be set
2211 to "ignore", to completely ignore a host whose IP address cannot be
2212 found. If all hosts are ignored, the behaviour is controlled by the new
2213 host_all_ignored option.
2215 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2216 homing or because of multiple MX records with /mx) generated more than
2217 one IP address, and the following item turned out to be the local host,
2218 all the secondary addresses of the first item were incorrectly removed
2219 from the list, along with the local host and any following hosts (which
2220 is what is supposed to happen).
2222 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2223 whoever called Exim into the -H file. In the case of the daemon it was
2224 behaving confusingly. When first started, it used values for whoever
2225 started the daemon, but after a SIGHUP it used the Exim user (because it
2226 calls itself on a restart). I have changed the code so that it now always
2229 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2230 message are rejected with the same error (e.g. no authentication or bad
2231 sender address), and a DATA command is nevertheless sent (as can happen
2232 with PIPELINING or a stupid MUA), the error message that was given to the
2233 RCPT commands is included in the rejection of the DATA command. This is
2234 intended to be helpful for MUAs that show only the final error to their
2237 PH/42 Another patch from the Sieve maintainer.
2239 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2240 Eximstats - Fixed some broken HTML links and added missing column headers
2242 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2243 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2245 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2247 PH/43 Yet another patch from the Sieve maintainer.
2249 PH/44 I found a way to check for a TCP/IP connection going away before sending
2250 the response to the final '.' that terminates a message, but only in the
2251 case where the client has not sent further data following the '.'
2252 (unfortunately, this is allowed). However, in many cases there won't be
2253 any further data because there won't be any more messages to send. A call
2254 to select() can be used: if it shows that the input is "ready", there is
2255 either input waiting, or the socket has been closed. An attempt to read
2256 the next input character can distinguish the two cases. Previously, Exim
2257 would have sent an OK response which the client would never have see.
2258 This could lead to message repetition. This fix should cure that, at
2259 least in a lot of common cases.
2261 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2262 advertised in response to EHLO.
2268 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2269 fixed by 4.65/MH/01 (is this a record?) are fixed:
2271 (i) An empty string was always treated as zero by the numeric comparison
2272 operators. This behaviour has been restored.
2274 (ii) It is documented that the numeric comparison operators always treat
2275 their arguments as decimal numbers. This was broken in that numbers
2276 starting with 0 were being interpreted as octal.
2278 While fixing these problems I realized that there was another issue that
2279 hadn't been noticed. Values of message_size_limit (both the global option
2280 and the transport option) were treated as octal if they started with 0.
2281 The documentation was vague. These values are now always treated as
2282 decimal, and I will make that clear in the documentation.
2288 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2289 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2292 MH/01 Don't check that the operands of numeric comparison operators are
2293 integers when their expansion is in "skipping" mode (fixes bug
2294 introduced by 4.64-PH/07).
2296 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2297 child addresses, Exim now panics and dies. Previously, because the count
2298 is held in a short int, deliveries were likely to be lost. As such a
2299 large number of recipients for a single message is ridiculous
2300 (performance will be very, very poor), I have chosen to impose a limit
2301 rather than extend the field.
2307 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2308 leftover -K file (the existence of which was triggered by #402).
2309 While we were at it, introduced process PID as part of the -K
2310 filename. This should rule out race conditions when creating
2313 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2314 processing considerably. Previous code took too long for large mails,
2315 triggering a timeout which in turn triggers #401.
2317 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2318 in the DK code in transports.c. sendfile() is not really portable,
2319 hence the _LINUX specificness.
2321 TF/01 In the add_headers option to the mail command in an Exim filter,
2322 there was a bug that Exim would claim a syntax error in any
2323 header after the first one which had an odd number of characters
2326 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2327 callout verification, Exim cached a "reject" for the entire domain. This
2328 is correct for most verifications, but it is not correct for a recipient
2329 verification with use_sender or use_postmaster set, because in that case
2330 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2331 case of MAIL FROM:<> rejection from other early rejections (e.g.
2332 rejection of HELO). When verifying a recipient using a non-null MAIL
2333 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2334 Whatever the result of the callout, the value of the domain cache is
2335 left unchanged (for any other kind of callout, getting as far as trying
2336 RCPT means that the domain itself is ok).
2338 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2341 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2342 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2343 session, the daemon ignores ECONNECT errors and logs others; it now
2344 ignores EPIPE as well.
2346 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2347 (quoted-printable decoding).
2349 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2350 later the small subsequent patch to fix an introduced bug.
2352 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2354 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2356 PH/08 An error is now given if message_size_limit is specified negative.
2358 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2359 to be given (somewhat) arbitrary names.
2361 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2364 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2365 miscellaneous code fixes
2367 PH/10 Added the log_reject_target ACL modifier to specify where to log
2370 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2371 hostname. This is wrong, because it relates to the incoming message (and
2372 probably the interface on which it is arriving) and not to the outgoing
2373 callout (which could be using a different interface). This has been
2374 changed to use the value of the helo_data option from the smtp transport
2375 instead - this is what is used when a message is actually being sent. If
2376 there is no remote transport (possible with a router that sets up host
2377 addresses), $smtp_active_hostname is used.
2379 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2380 tweaks were necessary in order to get it to work (see also 21 below):
2381 (a) The code assumed that strncpy() returns a negative number on buffer
2382 overflow, which isn't the case. Replaced with Exim's string_format()
2384 (b) There were several signed/unsigned issues. I just did the minimum
2385 hacking in of casts. There is scope for a larger refactoring.
2386 (c) The code used strcasecmp() which is not a standard C function.
2387 Replaced with Exim's strcmpic() function.
2388 (d) The code set only $1; it now sets $auth1 as well.
2389 (e) A simple test gave the error "authentication client didn't specify
2390 service in request". It would seem that Dovecot has changed its
2391 interface. Fortunately there's a specification; I followed it and
2392 changed what the client sends and it appears to be working now.
2394 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2397 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2398 address A is aliased to B and C, where B exists and C does not. Without
2399 -v the output is "A verified" because verification stops after a
2400 successful redirection if more than one address is generated. However,
2401 with -v the child addresses are also verified. Exim was outputting "A
2402 failed to verify" and then showing the successful verification for C,
2403 with its parentage. It now outputs "B failed to verify", showing B's
2404 parentage before showing the successful verification of C.
2406 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2407 look up a TXT record in a specific list after matching in a combined
2410 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2411 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2412 they consult the DNS. I had assumed they would set it the way they
2413 wanted; and indeed my experiments on Linux seem to show that in some
2414 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2415 To be on the safe side, however, I have now made the interface to
2416 host_find_byname() similar to host_find_bydns(), with an argument
2417 containing the DNS resolver options. The host_find_byname() function now
2418 sets these options at its start, just as host_find_bydns() does. The smtp
2419 transport options dns_qualify_single and dns_search_parents are passed to
2420 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2421 of host_find_byname() use the default settings of RES_DEFNAMES
2422 (qualify_single) but not RES_DNSRCH (search_parents).
2424 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2425 spool_read_header() do less string testing, by means of a preliminary
2426 switch on the second character of optional "-foo" lines. (This is
2427 overdue, caused by the large number of possibilities that now exist.
2428 Originally there were few.) While I was there, I also converted the
2429 str(n)cmp tests so they don't re-test the leading "-" and the first
2430 character, in the hope this might squeeze out yet more improvement.
2432 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2433 flag allowing group syntax was set by the header_syntax check but not
2434 turned off, possible causing trouble later; (2) The flag was not being
2435 set at all for the header_verify test, causing "group"-style headers to
2436 be rejected. I have now set it in this case, and also caused header_
2437 verify to ignore an empty address taken from a group. While doing this, I
2438 came across some other cases where the code for allowing group syntax
2439 while scanning a header line wasn't quite right (mostly, not resetting
2440 the flag correctly in the right place). These bugs could have caused
2441 trouble for malformed header lines. I hope it is now all correct.
2443 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2444 with the "reply" argument non-NULL. The code, however (which originally
2445 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2446 but it didn't always do it. This confused somebody who was copying the
2447 code for some other use. I have removed all the tests.
2449 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2450 feature that was used to support insecure browsers during the U.S. crypto
2451 embargo. It requires special client support, and Exim is probably the
2452 only MTA that supported it -- and would never use it because real RSA is
2453 always available. This code has been removed, because it had the bad
2454 effect of slowing Exim down by computing (never used) parameters for the
2455 RSA_EXPORT functionality.
2457 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2458 authenticator to fail if there's a tab character in the incoming data
2459 (there should never be unless someone is messing about, as it's supposed
2460 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2461 if the connection is using TLS or if the remote IP is the same as the
2462 local IP, and the "valid-client-cert option" if a client certificate has
2465 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2466 authenticators. This can be used for authorization after authentication
2467 succeeds. (In the case of plaintext, it servers for both authentication
2470 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2471 if any retry times were supplied.
2473 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2474 connection, where there is no client IP address to check. In this
2475 situation, the verify now always succeeds.
2477 PH/25 Applied John Jetmore's -Mset patch.
2479 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2481 PH/27 In a string expansion for a processed (not raw) header when multiple
2482 headers of the same name were present, leading whitespace was being
2483 removed from all of them, but trailing whitespace was being removed only
2484 from the last one. Now trailing whitespace is removed from each header
2485 before concatenation. Completely empty headers in a concatenation (as
2486 before) are ignored.
2488 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2489 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2491 PH/29 [Removed. This was a change that I later backed out, and forgot to
2492 correct the ChangeLog entry (that I had efficiently created) before
2493 committing the later change.]
2495 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2496 address errors (4xx response to RCPT) over the same connection as other
2497 messages routed to the same hosts. Such deliveries are always "forced",
2498 so retry times are not inspected. This resulted in far too many retries
2499 for the affected addresses. The effect occurred only when there were more
2500 hosts than the hosts_max_try setting in the smtp transport when it had
2501 the 4xx errors. Those hosts that it had tried were not added to the list
2502 of hosts for which the message was waiting, so if all were tried, there
2503 was no problem. Two fixes have been applied:
2505 (i) If there are any address or message errors in an SMTP delivery, none
2506 of the hosts (tried or untried) are now added to the list of hosts
2507 for which the message is waiting, so the message should not be a
2508 candidate for sending over the same connection that was used for a
2509 successful delivery of some other message. This seems entirely
2510 reasonable: after all the message is NOT "waiting for some host".
2511 This is so "obvious" that I'm not sure why it wasn't done
2512 previously. Hope I haven't missed anything, but it can't do any
2513 harm, as the worst effect is to miss an optimization.
2515 (ii) If, despite (i), such a delivery is accidentally attempted, the
2516 routing retry time is respected, so at least it doesn't keep
2517 hammering the server.
2519 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2520 in ${readsocket because some servers need this prod.
2522 PH/32 Added some extra debug output when updating a wait-xxx database.
2524 PH/33 The hint "could be header name not terminated by colon", which has been
2525 given for certain expansion errors for a long time, was not being given
2526 for the ${if def:h_colon_omitted{... case.
2528 PH/34 The spec says: "With one important exception, whenever a domain list is
2529 being scanned, $domain contains the subject domain." There was at least
2530 one case where this was not true.
2532 PH/35 The error "getsockname() failed: connection reset by peer" was being
2533 written to the panic log as well as the main log, but it isn't really
2534 panic-worthy as it just means the connection died rather early on. I have
2535 removed the panic log writing for the ECONNRESET error when getsockname()
2538 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2539 runs only) independently of the message's sender address. This meant
2540 that, if the 4xx error was in fact related to the sender, a different
2541 message to the same recipient with a different sender could confuse
2542 things. In particular, this can happen when sending to a greylisting
2543 server, but other circumstances could also provoke similar problems.
2544 I have changed the default so that the retry time for these errors is now
2545 based a combination of the sender and recipient addresses. This change
2546 can be overridden by setting address_retry_include_sender=false in the
2549 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2550 remote server are returned as part of bounce messages. This was not
2551 happening for LMTP over a pipe (the lmtp transport), but now it is the
2552 same for both kinds of LMTP.
2554 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2555 in header lines that were in fact CNAMEs. This is no longer the case.
2557 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2558 and queue runs started by the daemon processed all messages. This has
2559 been fixed so that -R and -S can now usefully be given with -q<time>.
2561 PH/40 Import PCRE release 6.7 (fixes some bugs).
2563 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2565 PH/42 Give an error if -q is specified more than once.
2567 PH/43 Renamed the variables $interface_address and $interface_port as
2568 $received_ip_address and $received_port, to make it clear that these
2569 values apply to message reception, and not to the outgoing interface when
2570 a message is delivered. (The old names remain recognized, of course.)
2572 PH/44 There was no timeout on the connect() call when using a Unix domain
2573 socket in the ${readsocket expansion. There now is.
2575 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2576 be meaningful with "accept".
2578 SC/01 Eximstats V1.43
2579 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2581 SC/02 Eximstats V1.44
2582 Use a glob alias rather than an array ref in the generated
2583 parser. This improves both readability and performance.
2585 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2586 Collect SpamAssassin and rejection statistics.
2587 Don't display local sender or destination tables unless
2588 there is data to show.
2589 Added average volumes into the top table text output.
2591 SC/04 Eximstats V1.46
2592 Collect data on the number of addresses (recipients)
2593 as well as the number of messages.
2595 SC/05 Eximstats V1.47
2596 Added 'Message too big' to the list of mail rejection
2597 reasons (thanks to Marco Gaiarin).
2599 SC/06 Eximstats V1.48
2600 Mainlog lines which have GMT offsets and are too short to
2601 have a flag are now skipped.
2603 SC/07 Eximstats V1.49 (Alain Williams)
2604 Added the -emptyok flag.
2606 SC/08 Eximstats V1.50
2607 Fixes for obtaining the IP address from reject messages.
2609 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2610 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2611 whitespace changes from 4.64-PH/27
2613 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2616 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2617 are found, allow negative numbers in numeric criteria)
2619 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2621 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2622 to match changes made in 4.64-PH/43
2624 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2626 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2627 "domain" is actually an IP address, and force a failure. This locks out
2628 those revolvers/nameservers that support "A-for-A" lookups, in
2629 contravention of the specifications.
2631 PH/48 When a host name was looked up from an IP address, and the subsequent
2632 forward lookup of the name timed out, the host name was left in
2633 $sender_host_name, contrary to the specification.
2635 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2636 restricted to single-key lookups, Exim was not diagnosing an error if
2637 * or *@ was used with a query-style lookup.
2639 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2641 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2642 long ago, but noone interested enough thought of it. Let's just say that
2643 the "1.1" means that there are some new functions that weren't there at
2644 some point in the past.
2646 PH/51 Error processing for expansion failure of helo_data from an smtp
2647 transport during callout processing was broken.
2649 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2650 tested/used via the -bh/-bhc/-bs options.
2652 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2653 bug, fixed in subsequent PCRE releases).
2655 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2656 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2658 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2664 SC/01 Use a glob alias rather than an array ref in eximstats generated
2665 parser. This improves both readability and performance.
2667 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2668 Don't display local sender or destination tables in eximstats unless
2669 there is data to show.
2670 Added average volumes into the eximstats top table text output.
2672 SC/03 Collect data on the number of addresses (recipients) as well
2673 as the number of messages in eximstats.
2675 TF/01 Correct an error in the documentation for the redirect router. Exim
2676 does (usually) call initgroups() when daemonizing.
2678 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2679 with consistent privilege compared to when running as a daemon.
2681 TF/03 Note in the spec that $authenticated_id is not set for local
2682 submissions from trusted users.
2684 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2685 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2687 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2688 by adding some example configuration directives to the default
2689 configuration file. A little bit of work is required to uncomment the
2690 directives and define how usernames and passwords are checked, but
2691 there is now a framework to start from.
2693 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2694 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2695 without this. I don't know how relevant this is to other LDAP libraries.
2697 PH/02 Add the verb name to the "unknown ACL verb" error.
2699 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2701 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2703 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2704 directory not expanded when it should be if an expanded home directory
2705 was set for the address (which is overridden by the transport).
2707 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2710 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2711 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2712 because it is too late at that time, and has no effect.
2714 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2715 security issue with \' (bugzilla #107). I could not use the
2716 PQescapeStringConn() function, because it needs a PGconn value as one of
2719 PH/08 When testing addresses using -bt, indicate those final addresses that
2720 are duplicates that would not cause an additional delivery. At least one
2721 person was confused, thinking that -bt output corresponded to deliveries.
2722 (Suppressing duplicates isn't a good idea as you lose the information
2723 about possibly different redirections that led to the duplicates.)
2725 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2726 systems where poll() doesn't work, in particular OS X.
2728 PH/10 Added more information to debugging output for retry time not reached.
2730 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2731 operations in malware.c.
2733 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2736 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2737 syslog_duplication set false, log lines that would normally be written
2738 both the the main log and to the reject log were not written to syslog at
2741 PH/14 In the default configuration, change the use of "message" in ACL warn
2742 statements to "add_header".
2744 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2745 not followed by a command (e.g. "seen endif").
2747 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2748 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2751 PH/17 Added extra conditions to the default value of delay_warning_condition
2755 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2756 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2757 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2760 The Auto-Submitted: and various List- headers are standardised, whereas I
2761 don't think Precedence: ever was.
2763 PH/18 Refactored debugging code in route_finduser() to show more information,
2764 in particular, the error code if getpwnam() issues one.
2766 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2767 This is apparently needed in addition to the PH/07 change above to avoid
2768 any possible encoding problems.
2770 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2771 but not after initializing Perl.
2773 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2774 output them only if debugging. By default they are written stderr,
2775 apparently, which is not desirable.
2777 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2780 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2783 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2785 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2786 authenticated or an ident call has been made. Suppress the default
2787 values for $authenticated_id and $authenticated_sender (but permit -oMai
2788 and -oMas) when testing with -bh.
2790 PH/24 Re-jigged the order of the tests in the default configuration so that the
2791 tests for valid domains and recipients precede the DNS black list and CSA
2792 tests, on the grounds that those ones are more expensive.
2794 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2795 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2796 This bug exists in every version of Exim that I still have, right back to
2799 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2800 However, an attempt to turn on case-sensitivity in a regex key by
2801 including (?-i) didn't work because the subject string was already
2802 lowercased, and the effects were non-intuitive. It turns out that a
2803 one-line patch can be used to allow (?-i) to work as expected.
2809 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2810 other effects) broke the use of negated acl sub-conditions.
2812 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2815 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2816 "Deny" causes Exim to reject the incoming connection with a 554 error.
2817 Unfortunately, if there is a major crisis, such as a disk failure,
2818 tcp-wrappers gives "deny", whereas what one would like would be some
2819 kind of temporary error. A kludge has been added to help with this.
2820 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2821 554 error is used if errno is still zero or contains ENOENT (which occurs
2822 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2825 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2827 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2828 errors. Otherwise a message that provokes a temporary error (when other
2829 messages do not) can cause a whole host to time out.
2831 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2832 addresses were routed directly to files or pipes from a redirect router.
2833 File deliveries just didn't batch; pipe deliveries might have suffered
2836 PH/06 A failure to get a lock for a hints database would erroneously always say
2837 "Failed to get write lock", even when it was really a read lock.
2839 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2840 of 0600. This has been changed to use the value of the lockfile_mode
2841 option (which defaults to 0600).
2843 PH/08 Applied small patch from the Sieve maintainer.
2845 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2846 folder from quota calculations, a direct delivery into this folder messed
2847 up the contents of the maildirsize file. This was because the regex was
2848 used only to exclude .Trash (or whatever) when the size of the mailbox
2849 was calculated. There was no check that a delivery was happening into an
2850 excluded directory. This bug has been fixed by ignoring all quota
2851 processing for deliveries into excluded directories.
2853 PH/10 Added the maildirfolder_create_regex option to appendfile.
2859 PH/01 The code for finding all the local interface addresses on a FreeBSD
2860 system running IPv6 was broken. This may well have applied to all BSD
2861 systems, as well as to others that have similar system calls. The broken
2862 code found IPv4 interfaces correctly, but gave incorrect values for the
2863 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2864 that it would not match correctly against @[] and not recognize the IPv6
2867 PH/02 The ipliteral router was not recognizing addresses of the form user@
2868 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2870 PH/03 Added disable_ipv6.
2872 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2873 decoded form, because it is most often used to construct To: headers
2874 lines in autoreplies, and the decoded form may well be syntactically
2875 invalid. However, $reply_address has leading white space removed, and all
2876 newlines turned into spaces so that the autoreply transport does not
2879 PH/05 If group was specified without a user on a router, and no group or user
2880 was specified on a transport, the group from the router was ignored.
2882 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2883 for visible compile-time settings that can be used to change these
2884 numbers, for those that want even more. Backwards compatibility with old
2885 spool files has been maintained. However, going back to a previous Exim
2886 release will lost any variables that are in spool files.
2888 PH/07 Two small changes when running in the test harness: increase delay when
2889 passing a TCP/IP connection to a new process, in case the original
2890 process has to generate a bounce, and remove special handling of
2891 127.0.0.2 (sic), which is no longer necessary.
2893 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2894 be the same on different OS.
2896 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2899 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2900 whether --show-vars was specified or not
2902 JJ/02 exipick: Added support for new ACL variable spool format introduced
2905 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2906 syntactically invalid From: or Reply-to: line, and a filter used this to
2907 generate an autoreply, and therefore failed to obtain an address for the
2908 autoreply, Exim could try to deliver to a non-existent relative file
2909 name, causing unrelated and misleading errors. What now happens is that
2910 it logs this as a hard delivery error, but does not attempt to create a
2913 PH/11 The exinext utility has a -C option for testing purposes, but although
2914 the given file was scanned by exinext itself; it wasn't being passed on
2915 when Exim was called.
2917 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2918 an end-of-file indication when reading a command response.
2920 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2921 compiled. In many other places in Exim, IPv6 addresses are always
2922 recognized, so I have changed this. It also means that IPv4 domain
2923 literals of the form [IPV4:n.n.n.n] are now always recognized.
2925 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2926 used if the router is not running as root, for example, when verifying at
2927 ACL time, or when using -bh. The debugging output from this situation was
2928 non-existent - all you got was a failure to exec. I have made two
2931 (a) Failures to set uid/gid, the current directory, or a process leader
2932 in a subprocess such as that created by queryprogram now generate
2933 suitable debugging output when -d is set.
2935 (b) The queryprogram router detects when it is not running as root,
2936 outputs suitable debugging information if -d is set, and then runs
2937 the subprocess without attempting to change uid/gid.
2939 PH/15 Minor change to Makefile for building test_host (undocumented testing
2942 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2943 additional section of a DNS packet that returns MX or SRV records.
2944 Instead, it always explicitly searches for A/AAAA records. This avoids
2945 major problems that occur when a DNS server includes only records of one
2946 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2947 fixed another bug: if SRV records were looked up and the corresponding
2948 address records were *not* found in the additional section, the port
2949 values from the SRV records were lost.
2951 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2952 using the correct key (the original address) when searching the retry
2953 rules in order to find which one to use for generating the retry hint.
2955 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2956 adding the default one. Similarly, if it contains a Reply-To: header, the
2957 errors_reply_to option, if set, is not used.
2959 PH/19 When calculating a retry time, Exim used to measure the "time since
2960 failure" by looking at the "first failed" field in the retry record. Now
2961 it does not use this if it is later than than the arrival time of the
2962 message. Instead it uses the arrival time. This makes for better
2963 behaviour in cases where some deliveries succeed, thus re-setting the
2964 "first failed" field. An example is a quota failure for a huge message
2965 when small messages continue to be delivered. Without this change, the
2966 "time since failure" will always be short, possible causing more frequent
2967 delivery attempts for the huge message than are intended.
2968 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2970 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2971 $1, $2, $3) because the numerical variables can be reset during some
2972 expansion items (e.g. "match"), thereby losing the authentication data.
2974 PH/21 Make -bV show the size of off_t variables so that the test suite can
2975 decide whether to run tests for quotas > 2G.
2977 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2978 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2979 filecount value is greater than 2G or if a quota value is greater than 2G
2980 on a system where the size of off_t is not greater than 4, a panic error
2983 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2984 never match. The debug and -bh output now contains an explicit error
2985 message indicating a malformed IPv4 address or mask.
2987 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2988 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2989 PH/23 above applies.
2991 PH/25 Do not write to syslog when running in the test harness. The only
2992 occasion when this arises is a failure to open the main or panic logs
2993 (for which there is an explicit test).
2995 PH/26 Added the /no_tell option to "control=freeze".
2997 PH/27 If a host name lookup failed very early in a connection, for example, if
2998 the IP address matched host_lookup and the reverse lookup yielded a name
2999 that did not have a forward lookup, an error message of the form "no IP
3000 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3001 could be logged. Now it outputs the IP address instead of "NULL".
3003 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3004 allows the sender and the authenticated sender to be set when
3005 submitting a message from within Exim. Since child_open_exim() is
3006 documented for local_scan(), the new function should be too.
3008 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3009 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3010 results in an empty string is now treated as unset.
3012 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3014 PH/31 Added sender_verify_fail logging option.
3016 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3017 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3018 tidied the source and removed it altogether.
3020 PH/33 When a queue run was abandoned because the load average was too high, a
3021 log line was always written; now it is written only if the queue_run log
3022 selector is set. In addition, the log line for abandonment now contains
3023 information about the queue run such as the pid. This is always present
3024 in "start" and "stop" lines but was omitted from the "abandon" line.
3026 PH/34 Omit spaces between a header name and the colon in the error message that
3027 is given when verify = headers_syntax fails (if there are lots of them,
3028 the message gets confusing).
3030 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3031 names, as there are now some PTR records that contain slashes. This check
3032 is only to protect against broken name servers that fall over on strange
3033 characters, so the fact that it applies to all lookups doesn't matter.
3035 PH/36 Now that the new test suite is complete, we can remove some of the
3036 special code in Exim that was needed for the old test suite. For example,
3037 sorting DNS records because real resolvers return them in an arbitrary
3038 order. The new test suite's fake resolver always returns records in the
3041 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3042 bounces) except when queue_only is set, to avoid logging races between
3043 the different processes.
3045 PH/38 Panic-die if .include specifies a non-absolute path.
3047 PH/39 A tweak to the "H" retry rule from its user.
3049 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3050 a label. They prevented compilation on older perls.
3052 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3053 a warning to be raised on newish perls.
3055 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3056 on queue. Changes to match documented behaviour of showing count of
3057 messages matching specified criteria.
3059 PH/40 Changed the default ident timeout from 30s to 5s.
3061 PH/41 Added support for the use of login_cap features, on those BSD systems
3062 that have them, for controlling the resources used by pipe deliveries.
3064 PH/42 The content-scanning code uses fopen() to create files in which to put
3065 message data. Previously it was not paying any attention to the mode of
3066 the files. Exim runs with umask(0) because the rest of the code creates
3067 files with open(), and sets the required mode explicitly. Thus, these
3068 files were ending up world-writeable. This was not a big issue, because,
3069 being within the spool directory, they were not world-accessible. I have
3070 created a function called modefopen, which takes an additional mode
3071 argument. It sets umask(777), creates the file, chmods it to the required
3072 mode, then resets the umask. All the relevant calls to fopen() in the
3073 content scanning code have been changed to use this function.
3075 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3076 to 24 hours. This avoids potential overflow problems when processing G
3077 and H retry rules. I suspect nobody ever tinkers with this value.
3079 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3081 PH/45 When the plaintext authenticator is running as a client, the server's
3082 challenges are checked to ensure they are valid base64 strings. By
3083 default, the authentication attempt is cancelled if an invalid string is
3084 received. Setting client_ignore_invalid_base64 true ignores these errors.
3085 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3086 they are received. Thus, the responses can be made to depend on the
3087 challenges. If an invalid string is ignored, an empty string is placed in
3090 PH/46 Messages that are created by the autoreply transport now contains a
3091 References: header, in accordance with RFCs 2822 and 3834.
3093 PH/47 Added authenticated_sender_force to the smtp transport.
3095 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3097 PH/49 Installed latest patch from the Sieve maintainer.
3099 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3100 was also set, the appendfile transport was unnecessarily scanning a
3101 directory of message files (e.g. for maildir delivery) to find the count
3102 of files (along with the size), even though it did not need this
3103 information. It now does the scan only if it needs to find either the
3104 size of the count of files.
3106 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3108 PH/52 Two bugs concerned with error handling when the smtp transport is
3111 (i) Exim was not creating retry information for temporary errors given
3112 for individual recipients after the DATA command when the smtp transport
3113 was used in LMTP mode. This meant that they could be retried too
3114 frequently, and not timed out correctly.
3116 (ii) Exim was setting the flag that allows error details to be returned
3117 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3118 recipients that were returned after the DATA command.
3120 PH/53 This is related to PH/52, but is more general: for any failing address,
3121 when detailed error information was permitted to be returned to the
3122 sender, but the error was temporary, then after the final timeout, only
3123 "retry timeout exceeded" was returned. Now it returns the full error as
3124 well as "retry timeout exceeded".
3126 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3127 do this, and (what is worse) MTAs that accept it.
3129 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3130 will now be deprecated.
3132 PH/56 New os.c-cygwin from the Cygwin maintainer.
3134 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3135 formats (previously only available in exim formats via -bpr, -bpru,
3136 and -bpra. Now also available in native and exiqgrep formats)
3138 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3139 with very large, slow to parse queues
3141 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3143 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3145 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3146 responses to authentication challenges, though it was showing the
3147 challenges; (ii) I've removed the CR characters from the debug output for
3150 PH/58 Allow for the insertion of a newline as well as a space when a string
3151 is turned into more than one encoded-word during RFC 2047 encoding. The
3152 Sieve code now uses this.
3154 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3155 data_4xx, lost_connection, tls_required.
3157 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3158 message was being sent as an SMTP response.
3160 PH/61 Add -l and -k options to exicyclog.
3162 PH/62 When verifying, if an address was redirected to one new address, so that
3163 verification continued, and the new address failed or deferred after
3164 having set something in $address_data, the value of $address_data was not
3165 passed back to the ACL. This was different to the case when no
3166 redirection occurred. The value is now passed back in both cases.
3168 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3169 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3170 use login_cap.h, so on its own it isn't the distinguishing feature. The
3171 new name refers directly to the setclassresources() function.
3173 PH/65 Added configuration files for NetBSD3.
3175 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3177 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3178 is preferred over IPv4.
3180 PH/68 The bounce_return_message and bounce_return_body options were not being
3181 honoured for bounces generated during the reception of non-SMTP messages.
3182 In particular, this applied to messages rejected by the ACL. This bug has
3183 been fixed. However, if bounce_return_message is true and bounce_return_
3184 body is false, the headers that are returned for a non-SMTP message
3185 include only those that have been read before the error was detected.
3186 (In the case of an ACL rejection, they have all been read.)
3188 PH/69 The HTML version of the specification is now built in a directory called
3189 spec_html instead of spec.html, because the latter looks like a path with
3190 a MIME-type, and this confuses some software.
3192 PH/70 Catch two compiler warnings in sieve.c.
3194 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3195 function verify_get_ident() calls ip_connect() to connect a socket, but
3196 if the "connect()" function timed out, ip_connect() used to close the
3197 socket. However, verify_get_ident() also closes the socket later, and in
3198 between Exim writes to the log, which may get opened at this point. When
3199 the socket was closed in ip_connect(), the log could get the same file
3200 descriptor number as the socket. This naturally causes chaos. The fix is
3201 not to close the socket in ip_connect(); the socket should be closed by
3202 the function that creates it. There was only one place in the code where
3203 this was missing, in the iplookup router, which I don't think anybody now
3204 uses, but I've fixed it anyway.
3206 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3207 well as to direct DNS lookups. Otherwise the handling of names in host
3208 lists is inconsistent and therefore confusing.
3214 PH/01 Two changes to the default runtime configuration:
3216 (1) Move the checks for relay_from_hosts and authenticated clients from
3217 after to before the (commented out) DNS black list checks.
3219 (2) Add control=submission to the relay_from_hosts and authenticated
3220 clients checks, on the grounds that messages accepted by these
3221 statements are most likely to be submissions.
3223 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3225 (1) Generate an error if the third argument for the ${prvs expansion is
3228 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3231 (3) Reset the variables that are obtained from the first argument of
3232 ${prvscheck and used in the second argument before leaving the code,
3233 because their memory is reclaimed, so using them afterwards may do
3236 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3237 one (it's much easier than Tom thought :-).
3239 (5) Because of (4), we can now allow for the use of $prvscheck_result
3240 inside the third argument.
3242 PH/03 For some reason, the default setting of PATH when running a command from
3243 a pipe transport was just "/usr/bin". I have changed it to
3246 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3247 anything to be listed in the output from -bV.
3249 PH/05 When a filter generated an autoreply, the entire To: header line was
3250 quoted in the delivery log line, like this:
3252 => >A.N.Other <ano@some.domain> <original@ddress> ...
3254 This has been changed so that it extracts the operative address. There
3255 may be more than one such address. If so, they are comma-separated, like
3258 => >ano@some.domain,ona@other.domain <original@ddress> ...
3260 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3261 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3262 not being looked up in the rDNS to get a host name, Exim was showing the
3263 IP address twice in Received: lines, even though the IP addresses were
3264 identical. For example:
3266 Received: from [1.2.3.4] (helo=[1.2.3.4])
3268 However, if the real host name was known, it was omitting the HELO data
3269 if it matched the actual IP address. This has been tidied up so that it
3270 doesn't show the same IP address twice.
3272 PH/07 When both +timestamp and +memory debugging was on, the value given by
3273 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3274 called by the debug printing, thereby overwriting the timestamp buffer.
3275 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3277 PH/08 When the original message was included in an autoreply transport, it
3278 always said "this is a copy of the message, including all the headers",
3279 even if body_only or headers_only was set. It now gives an appropriate
3282 PH/09 Applied a patch from the Sieve maintainer which:
3284 o fixes some comments
3285 o adds the (disabled) notify extension core
3286 o adds some debug output for the result of if/elsif tests
3287 o points to the current vacation draft in the documentation
3288 and documents the missing references header update
3292 o fixes a bug in processing the envelope test (when testing
3293 multiple envelope elements, the last element determined the
3296 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3297 Electronic Mail") by including:
3299 Auto-submitted: auto-generated
3301 in the messages that it generates (bounce messages and others, such as
3302 warnings). In the case of bounce messages for non-SMTP messages, there was
3303 also a typo: it was using "Auto_submitted" (underscore instead of
3304 hyphen). Since every message generated by Exim is necessarily in response
3305 to another message, thes have all been changed to:
3307 Auto-Submitted: auto-replied
3309 in accordance with these statements in the RFC:
3311 The auto-replied keyword:
3313 - SHOULD be used on messages sent in direct response to another
3314 message by an automatic process,
3316 - MUST NOT be used on manually-generated messages,
3318 - MAY be used on Delivery Status Notifications (DSNs) and Message
3319 Disposition Notifications (MDNs),
3321 - MUST NOT be used on messages generated by automatic or periodic
3322 processes, except for messages which are automatic responses to
3325 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3326 to the default Received: header definition.
3328 PH/12 Added log selector acl_warn_skipped (default on).
3330 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3331 variables because (a) they are in the wrong storage pool and (b) even if
3332 they were copied, it wouldn't work properly because of the caching.
3334 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3335 checking when decoding. Apparently there are clients that generate
3336 overlong encoded strings. Why am I not surprised?
3338 PH/15 If the first argument of "${if match_address" was not empty, but did not
3339 contain an "@" character, Exim crashed. Now it writes a panic log message
3340 and treats the condition as false.
3342 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3344 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3345 extension "envelope-auth". The code is finished and in agreement with
3346 other implementations, but there is no documentation so far and in fact,
3347 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3348 not changing the active code.
3350 Print executed "if" and "elsif" statements when debugging is used. This
3351 helps a great deal to understand what a filter does.
3353 Document more things not specified clearly in RFC3028. I had all this
3354 sorted out, when out of a sudden new issues came to my mind. Oops."
3356 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3359 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3360 canonical form (as documented). However, after a host name lookup from
3361 the IP address, check_host() was doing a simple string comparison with
3362 addresses acquired from the DNS when checking that the found name did
3363 have the original IP as one of its addresses. Since any found IPv6
3364 addresses are likely to be in abbreviated form, the comparison could
3365 fail. Luckily, there already exists a function for doing the comparison
3366 by converting both addresses to binary, so now that is used instead of
3367 the text comparison.
3369 PH/20 There was another similar case to PH/19, when a complete host name was
3370 given in a host list; looking up its IP address could give an abbreviated
3371 form, whereas the current host's name might or might not be abbreviated.
3372 The same fix has been applied.
3378 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3379 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3382 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3383 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3385 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3387 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3388 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3389 Also, for "Auto-Submitted", treat anything other than "no" as
3390 non-personal, in accordance with RFC 3834. (Previously it treated
3391 anything starting "auto-" as non-personal.)
3393 TF/01 The control=submission/name=... option had a problem with syntax
3394 errors if the name included a slash character. The /name= option
3395 now slurps the rest of the string, so it can include any characters
3396 but it must come last in the list of options (after /sender_retain
3399 PH/05 Some modifications to the interface to the fake nameserver for the new
3407 TK/01 Added the "success_on_redirect" address verification option. See
3408 NewStuff for rationale and an example.
3410 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3412 PH/02 Patch to exigrep to allow it to work on syslog lines.
3414 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3415 fread() to skip over the body file's header line, because in Cygwin the
3416 header line is locked and is inaccessible.
3418 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3419 co-exist for some time) to make it clear that it is the Exim ID that is
3420 referenced, not the Message-ID: header line.
3422 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3423 string_format() function, because snprintf() does not exist on all
3426 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3427 ${stat: expansion item.
3429 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3430 protocol synchronization error", to keep the pedants happy.
3432 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3433 well as for IRIX systems, when gcc is being used. See the host.c source
3436 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3438 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3441 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3442 transport and to the smtp transport in LMTP mode.
3444 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3446 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3447 run a filter in a subprocess. This could lead to confusion in subsequent
3448 lookups in the parent process. There should also be a search_tidyup() at
3449 the end of the subprocess.
3451 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3452 only if the host matched helo_try_verify_hosts, which caused the
3453 verification to occur when the EHLO/HELO command was issued. The ACL just
3454 tested the remembered result. Now, if a previous verification attempt has
3455 not happened, "verify = helo" does it there and then.
3457 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3459 TK/03 Fix log output including CR from clamd.
3461 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3462 exist provoked a memory error which could cause a segfault.
3464 PH/15 Installed PCRE 6.2
3466 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3468 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3469 of the problem. Specifically, suggested +O2 rather than +O1 for the
3472 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3474 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3475 record, the port was not correctly logged when the outgoing_port log
3476 selector was set (it logged the transort's default port).
3478 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3479 fallback_hosts, and "hosts" in the smtp transport.
3481 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3482 host errors such as "Connection refused".
3484 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3485 authentication with radiusclient 0.4.9:
3487 - Error returned from rc_read_config was caught wrongly
3488 - Username/password not passed on to radius server due to wrong length.
3490 The presumption is that some radiusclient API changes for 4.51/PH/17
3491 were not taken care of correctly. The code is still untested by me (my
3492 Linux distribution still has 0.3.2 of radiusclient), but it was
3493 contributed by a Radius user.
3495 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3496 expanding the "port" option of the smtp transport.
3498 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3499 while reading a MIME header. Thanks to Tom Hughes for a patch.
3501 PH/24 Include config.h inside local_scan.h so that configuration settings are
3504 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3505 that in an ACL for RCPT (for example), you can examine exactly what was
3508 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3509 commands, but it was not correctly comparing the address with the actual
3510 client host address. Thus, it would show the EHLO address in Received:
3511 header lines when this was not necessary.
3513 PH/27 Added the % operator to ${eval:}.
3515 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3516 it should be ignoring failures (because with -C, for example, it has lost
3517 privilege). It wasn't ignoring creation failures other than "already
3520 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3523 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3524 because an input line was too long, either on its own, or by virtue of
3525 too many continuations, the temporary file was not being removed, and the
3526 return code was incorrect.
3528 PH/31 Missing "BOOL" in function definition in filtertest.c.
3530 PH/32 Applied Sieve patches from the maintainer.
3532 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3534 PH/33 Added "verify = not_blind".
3536 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3537 Local/Makefile (with some defaults set). These are used in built scripts
3538 such as exicyclog, but they have never been used in the exim_install
3539 script (though there are many overriding facilities there). I have
3540 arranged that the exim_install script now takes note of these two
3543 PH/35 Installed configuration files for Dragonfly.
3545 PH/36 When a locally submitted message by a trusted user did not contain a
3546 From: header, and the sender address was obtained from -f or from an SMTP
3547 MAIL command, and the trusted user did not use -F to supply a sender
3548 name, $originator_name was incorrectly used when constructing a From:
3549 header. Furthermore, $originator_name was used for submission mode
3550 messages from external hosts without From: headers in a similar way,
3551 which is clearly wrong.
3553 PH/37 Added control=suppress_local_fixups.
3555 PH/38 When log_selector = +received_sender was set, and the addition of the
3556 sender made the log line's construction buffer exactly full, or one byte
3557 less than full, an overflow happened when the terminating "\n" was
3560 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3561 when the result of a list match is failure because a DNS lookup failed.
3563 PH/40 RM_COMMAND is now used in the building process.
3565 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3566 the "build-* directories that it finds.
3568 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3569 address in a domain literal was a prefix of an interface address.
3571 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3572 when verifying a sender address, unless rewrite_headers is false.
3574 PH/44 Wrote a long comment about why errors_to addresses are verified as
3575 recipients, not senders.
3577 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3578 the ratelimit ACL was added.
3580 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3582 PH/46 Added extra information about PostgreSQL errors to the error string.
3584 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3585 avoiding the need to install special zones in a real server. This is
3586 backwards compatible; if it can't find the fake resolver, it drops back.
3587 Thus, both old and new test suites can be run.
3589 TF/02 Added util/ratelimit.pl
3591 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3592 clock is set back in time.
3594 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3595 Candler <B.Candler@pobox.com>.
3597 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3598 OK for addresses that are the result of redirections.
3600 PH/48 A number of further additions for the benefit of the new test suite,
3601 including a fake gethostbyname() that interfaces to the fake DNS resolver
3604 TF/06 The fix for widen_domains has also been applied to qualify_single and
3605 search_parents which are the other dnslookup options that can cause
3608 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3611 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3613 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3614 service" if it encountered an MX record with an empty target hostname.
3615 The message is now "an MX or SRV record indicated no SMTP service".
3617 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3618 if the DNS of the sending site is misconfigured. This is quite a
3619 common situation. This change restores the behaviour of treating a
3620 helo verification defer as a failure.
3622 PH/51 If self=fail was set on a router, the bounce message did not include the
3623 actual error message.
3629 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3631 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3632 command itself ended in error, the underlying message about the transport
3633 filter timeout was being overwritten with the pipe command error. Now the
3634 underlying error message should be appended to the second error message.
3636 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3638 PH/02 Reduce the amount of output that "make" produces by default. Full output
3639 can still be requested.
3641 PH/03 The warning log line about a condition test deferring for a "warn" verb
3642 was being output only once per connection, rather than after each
3643 occurrence (because it was using the same function as for successful
3644 "warn" verbs). This seems wrong, so I have changed it.
3646 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3647 it should not have, which might have caused a crash in the right
3648 circumstances, but probably never did.
3650 PH/04 Installed a modified version of Tony Finch's patch to make submission
3651 mode fix the return path as well as the Sender: header line, and to
3652 add a /name= option so that you can make the user's friendly name appear
3655 TF/03 Added the control = fakedefer ACL modifier.
3657 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3658 Mark Lowes for thorough testing.
3660 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3662 TK/03 Merged latest SRS patch from Miles Wilton.
3664 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3665 with the definition in sysexits.h (which is #included earlier).
3666 Fortunately, Exim does not actually use EX_OK. The code used to try to
3667 preserve the sysexits.h value, by assuming that macro definitions were
3668 scanned for macro replacements. I have been disabused of this notion,
3669 so now the code just undefines EX_OK before #including unistd.h.
3671 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3672 in the smtp transport. When a block could not be written in a single
3673 write() function, the timeout was being re-applied to each part-write.
3674 This seems wrong - if the receiver was accepting one byte at a time it
3675 would take for ever. The timeout is now adjusted when this happens. It
3676 doesn't have to be particularly precise.
3678 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3679 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3681 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3682 without a domain if the check to <postmaster@domain> fails.
3684 SC/01 Eximstats: added -xls and the ability to specify output files
3685 (patch written by Frank Heydlauf).
3687 SC/02 Eximstats: use FileHandles for outputting results.
3689 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3691 SC/04 Eximstats: fixed display of large numbers with -nvr option
3693 SC/05 Eximstats: fixed merging of reports with empty tables.
3695 SC/06 Eximstats: added the -include_original_destination flag
3697 SC/07 Eximstats: removed tabs and trailing whitespace.
3699 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3701 TK/06 MBOX spool code: Add real "From " MBOX separator line
3702 so the .eml file is really in mbox format (even though
3703 most programs do not really care). Patch from Alex Miller.
3705 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3706 The latter is generated from $received_to and is only set if the
3707 message has one envelope recipient. SA can use these headers,
3708 obviously out-of-the-box. Patch from Alex Miller.
3710 PH/08 The ${def test on a variable was returning false if the variable's
3711 value was "0", contrary to what the specification has always said!
3712 The result should be true unless the variable is empty.
3714 PH/09 The syntax error of a character other than { following "${if
3715 def:variable_name" (after optional whitespace) was not being diagnosed.
3716 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3717 accidental colon was present, for example, could give incorrect results.
3719 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3720 result is used (not including appendfile, where other changes are about
3723 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3724 This involved changing a lot of size variables from int to off_t. It
3725 should work with maildirs and everything.
3727 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3728 spamd dying while we are connected to it.
3730 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3733 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3734 function for BDB 4.3.
3736 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3738 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3739 the sources for PCRE have been re-arranged and more files are now
3742 PH/15 The code I had for printing potentially long long variables in PH/11
3743 above was not the best (it lost precision). The length of off_t variables
3744 is now inspected at build time, and an appropriate printing format (%ld
3745 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3746 to be "long long int" or "long int". This is needed for the internal
3747 formatting function string_vformat().
3749 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3750 the configuration file to be ":syslog", then the script "guesses" where
3751 the logs files are, rather than using the compiled in default. In our
3752 case the guess is not the same as the compiled default, so the script
3753 suddenly stopped working when I started to use syslog. The patch checks
3754 to see if log_file_path is "". If so, it attempts to read it from exim
3755 with no configuration file to get the compiled in version, before it
3756 falls back to the previous guessing code."
3758 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3759 implementing BATV in an Exim configuration. See NewStuff for the gory
3762 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3763 Makefile that are specific to HP-UX.
3765 PH/18 If the "use_postmaster" option was set for a recipient callout together
3766 with the "random" option, the postmaster address was used as the MAIL
3767 FROM address for the random test, but not for the subsequent recipient
3768 test. It is now used for both.
3770 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3771 patch removes a few documentation additions to RFC 3028, because the
3772 latest draft now contains them. It adds the new en;ascii-case comparator
3773 and a new error check for 8bit text in MIME parts. Comparator and
3774 require names are now matched exactly. I enabled the subaddress
3775 extension, but it is not well tested yet (read: it works for me)."
3777 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3778 rework some of the code of TK/09 above to avoid the hardwired use of
3779 "%lld" and "long long". Replaced the call to snprintf() with a call to
3782 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3783 records point to non-existent hosts", "retry timeout exceeded", and
3784 "retry time not reached for any host after a long failure period".
3786 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3787 experimental DomainKeys support:
3789 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3790 (2) On an error such as an illegally used "control", the wrong name for
3791 the control was given.
3793 These problems did NOT occur unless DomainKeys support was compiled.
3795 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3797 PH/24 Added ${if match_ip condition.
3799 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3800 databases so that it will be absolutely obvious if a crash occurs in the
3801 DB library. This is a regular occurrence (often caused by mis-matched
3804 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3805 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3806 picked up on a user's system that detects such things. There doesn't seem
3807 to be a gcc warning option for this - only an attribute that has to be
3808 put on the function's prototype. It seems that in Fedora Core 4 they have
3809 set this on a number of new functions. No doubt there will be more in due
3812 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3813 specify a transport. However, if an address that was verified by such a
3814 router was the subject of a callout, Exim crashed because it tried to
3815 read the rcpt_include_affixes from the non-existent transport. Now it
3816 just assumes that the setting of that option is false. This bug was
3817 introduced by 4.51/PH/31.
3819 PH/28 Changed -d+all to exclude +memory, because that information is very
3820 rarely of interest, but it makes the output a lot bigger. People tend to
3821 do -d+all out of habit.
3823 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3824 code in os-type was giving problems when libc.so lives in lib64, like on
3827 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3828 aren't the modern standard, and it seems that some systems' include files
3829 don't always have them. Exim was already checking for some of the newer
3830 ones like T_AAAA, and defining it itself. I've added checks for all the
3831 record types that Exim uses.
3833 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3834 not automatically generating a new one, as it is supposed to. This
3835 prevented TLS from working. If the file did exist, but contained invalid
3836 data, a new version was generated, as expected. It was only the case of a
3837 non-existent file that was broken.
3839 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3840 with a change in libdomainkeys > 0.64.
3842 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3843 from DNS. If the selector record carries the flag, it now has
3844 precedence over the domain-wide flag.
3846 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3848 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3849 the use of a port name that isn't defined in /etc/services) occurred, the
3850 message was deferred as in a normal delivery, and thus remained on the
3851 spool, instead of being failed because of the mua_wrapper setting. This
3852 is now fixed, and I tidied up some of the mua_wrapper messages at the
3855 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3856 the messages in a hash of arrays rather than using individual hashes.
3857 This is a bit cleaner and results in dramatic memory savings, albeit
3858 at a slight CPU cost.
3860 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3861 as requested by Marc Sherman.
3863 SC/10 Eximstats: added histograms for user specified patterns as requested
3866 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3868 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3869 fopen() in the content-scanning modules that did not already have it.
3875 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3876 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3878 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3880 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3882 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3883 to test Sieve filters that use "vacation".
3885 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3886 that changes the way the GnuTLS parameters are stored in the cache file.
3887 The new format can be generated externally. For backward compatibility,
3888 if the data in the cache doesn't make sense, Exim assumes it has read an
3889 old-format file, and it generates new data and writes a new file. This
3890 means that you can't go back to an older release without removing the
3893 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3894 work if there are any delivery delays because "one_time" forces the
3895 parent to be marked "delivered", so its unseen clone is never tried
3896 again. For this reason, Exim now forbids the simultaneous setting of
3899 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3900 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3901 entry if you want to know the details. The fix, however, neglected to
3902 consider the case when local delivery batching is involved. The test for
3903 "previously delivered" was not happening when checking to see if an
3904 address could be batched with a previous (undelivered) one; under
3905 certain circumstances this could lead to multiple deliveries to the same
3908 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3909 in its include files, and this causes problems building Exim.
3911 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3912 header_syntax) but Exim was just ignoring anything given after a slash.
3913 In particular, this caused confusion with an attempt to use "verify =
3914 reverse_host_lookup/defer_ok". An error is now given when options are
3915 supplied for verify items that do not have them. (Maybe reverse_host_
3916 lookup should have a defer_ok option, but that's a different point.)
3918 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3919 defined by RFC 821) to 2048, because there were problems with some AUTH
3920 commands, and RFC 1869 says the size should be increased for extended
3921 SMTP commands that take arguments.
3923 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3926 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3927 "unknown" error; now it says that the functionality isn't in the binary.
3929 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3930 an address' error message when a string expansion fails (syntax or
3931 whatever). Otherwise the password may appear in the log. Following change
3932 PH/42 below, there is no longer a chance of it appearing in a bounce
3935 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3937 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3938 of its addresses was ever tried. (Bugzilla bug #2.)
3940 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3941 the result incorrectly in the debug output. (It correctly added a newline
3942 to what was transported.)
3944 TF/01 Added $received_time.
3946 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3947 commented out examples of how to interface to a virus scanner and to
3948 SpamAssassin. Also added commented examples of av_scanner and
3949 spamd_address settings.
3951 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3952 and controls are allowed in which ACLs. There were a couple of minor
3953 errors. Some of the entries in the conditions table (which is a table of
3954 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3955 negation of where the condition IS allowed.
3957 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3959 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3960 header file does not have a version number, so I've had to invent a new
3961 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3962 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3963 radiusclient), but it was contributed by a Radius user.
3965 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3966 files or directories, for OpenSSL.
3968 PH/19 When an Exim process that is running as root has to create an Exim log
3969 file, it does so in a subprocess that runs as exim:exim so as to get the
3970 ownership right at creation (otherwise, other Exim processes might see
3971 the file with the wrong ownership). There was no test for failure of this
3972 fork() call, which would lead to the process getting stuck as it waited
3973 for a non-existent subprocess. Forks do occasionally fail when resources
3974 run out. I reviewed all the other calls to fork(); they all seem to check
3977 PH/20 When checking for unexpected SMTP input at connect time (before writing
3978 the banner), Exim was not dealing correctly with a non-positive return
3979 from the read() function. If the client had disconnected by this time,
3980 the result was a log entry for a synchronization error with an empty
3981 string after "input=" when read() returned zero. If read() returned -1
3982 (an event I could not check), uninitialized data bytes were printed.
3983 There were reports of junk text (parts of files, etc) appearing after
3986 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3988 PH/22 Added support for macro redefinition, and (re)definition in between
3989 driver and ACL definitions.
3991 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3992 forgetting to use the resulting value; it was using the unexpanded value.
3994 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3995 hadn't been configured. The fix is from Juergen Kreileder, who
3996 understands it better than I do:
3998 "Here's what I see happening with three configured cyrus_sasl
3999 authenticators configured (plain, login, cram-md5):
4001 On startup auth_cyrus_sasl_init() gets called for each of these.
4002 This means three calls to sasl_listmech() without a specified mech_list.
4003 => SASL tests which mechs of all available mechs actually work
4004 => three warnings about OTP not working
4005 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4007 With the patch, sasl_listmech() also gets called three times. But now
4008 SASL's mech_list option is set to the server_mech specified in the the
4009 authenticator. Or in other words, the answer from sasl_listmech()
4010 gets limited to just the mech you're testing for (which is different
4012 => the return list contains just 'plain' or 'login', 'cram-md5' or
4013 nothing depending on the value of ob->server_mech.
4015 I've just tested the patch: Authentication still works fine,
4016 unavailable mechs specified in the exim configuration are still
4017 caught, and the auth.log warnings about OTP are gone."
4019 PH/25 When debugging is enabled, the contents of the command line are added
4020 to the debugging output, even when log_selector=+arguments is not
4023 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4024 answer is "GNU", and only if the return is "GNU/something" is the answer
4027 PH/27 $acl_verify_message is now set immediately after the failure of a
4028 verification in an ACL, and so is available in subsequent modifiers. In
4029 particular, the message can be preserved by coding like this:
4031 warn !verify = sender
4032 set acl_m0 = $acl_verify_message
4034 Previously, $acl_verify_message was set only while expanding "message"
4035 and "log_message" when a very denied access.
4037 PH/28 Modified OS/os.c-Linux with
4039 -#ifndef OS_LOAD_AVERAGE
4040 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4042 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4043 nomenclature these days.)
4045 PH/29 Installed patch from the Sieve maintainer that adds the options
4046 sieve_useraddress and sieve_subaddress to the redirect router.
4048 PH/30 In these circumstances:
4049 . Two addresses routed to the same list of hosts;
4050 . First host does not offer TLS;
4051 . First host accepts first address;
4052 . First host gives temporary error to second address;
4053 . Second host offers TLS and a TLS session is established;
4054 . Second host accepts second address.
4055 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4056 and peerdn, if requested) that were in fact used only for the second
4059 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4060 attention to any local part prefix or suffix that was matched by the
4061 router that accepted the address. It now behaves in the same way as it
4062 does for delivery: the affixes are removed from the local part unless
4063 rcpt_include_affixes is set on the transport.
4065 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4066 timeout during the DATA phase of an incoming message.
4068 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4069 applied a patch sanctioned by the Sieve maintainer.
4071 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4072 the uid or gid is negative. A case of a negative gid caused this to be
4073 noticed. The fix allows for either to be negative.
4075 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4076 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4079 PH/36 The change PH/12 above was broken. Fixed it.
4081 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4082 the grounds that routing the same address twice would always produce the
4083 same answer. This might have been true once, but it is certainly no
4084 longer true now. Routing a child address may depend on the previous
4085 routing that produced that child. Some complicated redirection strategies
4086 went wrong when messages had multiple recipients, and made Exim's
4087 behaviour dependent on the order in which the addresses were given.
4089 I have moved the duplicate checking until after the routing is complete.
4090 Exim scans the addresses that are assigned to local and remote
4091 transports, and removes any duplicates. This means that more work will be
4092 done, as duplicates will always all be routed, but duplicates are
4093 presumably rare, so I don't expect this is of any significance.
4095 For deliveries to pipes, files, and autoreplies, the duplicate checking
4096 still happens during the routing process, since they are not going to be
4099 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4100 It corrects a timeout issue with spamd. This is Ian's comment: "The
4101 background is that sometimes spamd either never reads data from a
4102 connection it has accepted, or it never writes response data. The exiscan
4103 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4104 blindly assumes that writes won't block so it may never time out."
4106 PH/39 Allow G after quota size as well as K and M.
4108 PH/40 The value set for $authenticated_id in an authenticator may not contain
4109 binary zeroes or newlines because the value is written to log lines and
4110 to spool files. There was no check on this. Now the value is run through
4111 the string_printing() function so that such characters are converted to
4112 printable escape sequences.
4114 PH/41 $message_linecount is a new variable that contains the total number of
4115 lines in the message. Compare $body_linecount, which is the count for the
4118 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4119 bounce and delay warning messages, except in certain special cases, which
4122 (a) An SMTP error message from a remote host;
4123 (b) A message specified in a :fail: redirection;
4124 (c) A message specified in a "fail" command in a system filter;
4125 (d) A message specified in a FAIL return from the queryprogram router;
4126 (e) A message specified by the cannot_route_message router option.
4128 In these cases only, Exim does include the error details in bounce and
4129 warning messages. There are also a few cases where bland messages such
4130 as "unrouteable address" or "local delivery error" are given.
4132 PH/43 $value is now also set for the "else" part of a ${run expansion.
4134 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4135 being worked on, but at least Exim now implements the latest version to
4138 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4139 process to complete was treated as a delivery failure, a timeout while
4140 writing the message to the pipe was logged, but erroneously treated as a
4141 successful delivery. Such timeouts include transport filter timeouts. For
4142 consistency with the overall process timeout, these timeouts are now
4143 treated as errors, giving rise to delivery failures by default. However,
4144 there is now a new Boolean option for the pipe transport called
4145 timeout_defer, which, if set TRUE, converts the failures into defers for
4146 both kinds of timeout. A transport filter timeout is now identified in
4149 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4150 systems where "make" and "gmake" are different, calling "gmake" at top
4151 level broke things. I've arranged for the value of $(MAKE) to be passed
4152 from the Makefile to this script so that it can call the same version of
4156 A note about Exim versions 4.44 and 4.50
4157 ----------------------------------------
4159 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4160 changes of various kinds. As a consequence, a big documentation update was
4161 needed. This delayed the release for rather longer than seemed good, especially
4162 in the light of a couple of (minor) security issues. Therefore, the changes
4163 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4164 release. So 4.44 and 4.50 are in effect two different branches that both start
4167 I have left the 4.50 change log unchanged; it contains all the changes since
4168 4.43. The change log for 4.44 is below; many of its items are identical to
4169 those for 4.50. This seems to be the most sensible way to preserve the
4170 historical information.
4176 1. Minor wording change to the doc/README.SIEVE file.
4178 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4179 computation of the current number of files was incorrect.
4181 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4182 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4185 4. Give more explanation in the error message when the command for a transport
4186 filter fails to execute.
4188 5. There are several places where Exim runs a non-Exim command in a
4189 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4190 was being done only for the command run by the queryprogram router. It is
4191 now done for all such subprocesses. The other cases are: ${run, transport
4192 filters, and the commands run by the lmtp and pipe transports.
4194 6. Added CONFIGURE_GROUP build-time option.
4196 7. Some older OS have a limit of 256 on the maximum number of file
4197 descriptors. Exim was using setrlimit() to set 1000 as a large value
4198 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4199 systems. I've change it so that if it can't get 1000, it tries for 256.
4201 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4202 was an oversight, and furthermore, ever since the addition of extra
4203 controls (e.g. 4.43/32), the checks on when to allow different forms of
4204 "control" were broken. There should now be diagnostics for all cases when a
4205 control that does not make sense is encountered.
4207 9. Added the /retain_sender option to "control=submission".
4209 10. $recipients is now available in the predata ACL (oversight).
4211 11. Tidy the search cache before the fork to do a delivery from a message
4212 received from the command line. Otherwise the child will trigger a lookup
4213 failure and thereby defer the delivery if it tries to use (for example) a
4214 cached ldap connection that the parent has called unbind on.
4216 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4217 of $address_data from the recipient verification was clobbered by the
4218 sender verification.
4220 13. The value of address_data from a sender verification is now available in
4221 $sender_address_data in subsequent conditions in the ACL statement.
4223 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4225 15. Added a new option "connect=<time>" to callout options, to set a different
4228 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4229 was its contents. (It was OK if the option was not defined at all.)
4231 17. A "Completed" log line is now written for messages that are removed from
4232 the spool by the -Mrm option.
4234 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4235 information about exactly what failed.
4237 19. Added -dd to debug only the daemon process.
4239 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4240 handles timeouts, both on the server side and network timeouts. Renamed the
4241 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4243 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4244 It is now set to "smtps".
4246 22. $host_address is now set to the target address during the checking of
4247 ignore_target_hosts.
4249 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4250 being passed; this would have caused $sender_host_name to have been used if
4251 matching the list had actually called for a host name (not very likely,
4252 since this list is usually IP addresses). A host name is now passed as
4255 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4256 code that specifies a non-restarting handler (typically sigaction() in
4257 modern systems) in an attempt to fix a rare and obscure crash bug.
4259 25. Narrowed the window for a race in the daemon that could cause it to ignore
4260 SIGCHLD signals. This is not a major problem, because they are used only to
4261 wake it up if nothing else does.
4263 26. A malformed maildirsize file could cause Exim to calculate negative values
4264 for the mailbox size or file count. Odd effects could occur as a result.
4265 The maildirsize information is now recalculated if the size or filecount
4268 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4269 support for a long time. Removed HAVE_SYS_VFS_H.
4271 28. Installed the latest version of exipick from John Jetmore.
4273 29. In an address list, if the pattern was not a regular expression, an empty
4274 subject address (from a bounce message) matched only if the pattern was an
4275 empty string. Non-empty patterns were not even tested. This was the wrong
4276 because it is perfectly reasonable to use an empty address as part of a
4277 database query. An empty address is now tested by patterns that are
4278 lookups. However, all the other forms of pattern expect the subject to
4279 contain a local part and a domain, and therefore, for them, an empty
4280 address still always fails if the pattern is not itself empty.
4282 30. Exim went into a mad DNS loop when attempting to do a callout where the
4283 host was specified on an smtp transport, and looking it up yielded more
4284 than one IP address.
4286 31. Re-factored the code for checking spool and log partition space into a
4287 function that finds that data and another that does the check. The former
4288 is then used to implement four new variables: $spool_space, $log_space,
4289 $spool_inodes, and $log_inodes.
4291 32. The RFC2047 encoding function was originally intended for short strings
4292 such as real names; it was not keeping to the 75-character limit for
4293 encoded words that the RFC imposes. It now respects the limit, and
4294 generates multiple encoded words if necessary. To be on the safe side, I
4295 have increased the buffer size for the ${rfc2047: expansion operator from
4298 33. It is now permitted to omit both strings after an "if" condition; if the
4299 condition is true, the result is "true". As before, when the second string
4300 is omitted, a false condition yields an empty string. This makes it less
4301 cumbersome to write custom ACL and router conditions.
4303 34. Failure to deliver a bounce message always caused it to be frozen, even if
4304 there was an errors_to setting on the router. The errors_to setting is now
4307 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4308 canonical form (fully expanded) before being placed in
4309 $sender_host_address.
4311 36. The table in the code that translates DNS record types into text (T_A to
4312 "A" for instance) was missing entries for NS and CNAME. It is just possible
4313 that this could have caused confusion if both these types were looked up
4314 for the same domain, because the text type is used as part of Exim's
4315 per-process caching. But the chance of anyone hitting this buglet seems
4318 37. The dnsdb lookup has been extended in a number of ways.
4320 (1) There is a new type, "zns", which walks up the domain tree until it
4321 finds some nameserver records. It should be used with care.
4323 (2) There is a new type, "mxh", which is like "mx" except that it returns
4324 just the host names, not the priorities.
4326 (3) It is now possible to give a list of domains (or IP addresses) to be
4327 looked up. The behaviour when one of the lookups defers can be
4328 controlled by a keyword.
4330 (4) It is now possible to specify the separator character for use when
4331 multiple records are returned.
4333 38. The dnslists ACL condition has been extended: it is now possible to supply
4334 a list of IP addresses and/or domains to be looked up in a particular DNS
4337 39. Added log_selector=+queue_time_overall.
4339 40. When running the queue in the test harness, wait just a tad after forking a
4340 delivery process, to get repeatability of debugging output.
4342 41. Include certificate and key file names in error message when GnuTLS fails
4343 to set them up, because the GnuTLS error message doesn't include the name
4344 of the failing file when there is a problem reading it.
4346 42. Allow both -bf and -bF in the same test run.
4348 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4350 44. The "Exiscan patch" is now merged into the mainline Exim source.
4352 45. Sometimes the final signoff response after QUIT could fail to get
4353 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4354 < 0 before doing a fflush(). This bug looks as though it goes back to the
4355 introduction of TLS in release 3.20, but "sometimes" must have been rare
4356 because the tests only now provoked it.
4358 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4359 (this can affect the format of dates).
4361 47. exim_tidydb, when checking for the continued existence of a message for
4362 which it has found a message-specific retry record, was not finding
4363 messages that were in split spool directories. Consequently, it was
4364 deleting retry records that should have stayed in existence.
4366 48. Steve fixed some bugs in eximstats.
4368 49. The SPA authentication driver was not abandoning authentication and moving
4369 on to the next authenticator when an expansion was forced to fail,
4370 contradicting the general specification for all authenticators. Instead it
4371 was generating a temporary error. It now behaves as specified.
4373 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4374 (the order specifies the preference for clients). The order is now AES256,
4375 AES128, 3DES, ARCFOUR128.
4377 51. Small patch to Sieve code - explicitly set From: when generating an
4380 52. Exim crashed if a remote delivery caused a very long error message to be
4381 recorded - for instance if somebody sent an entire SpamAssassin report back
4382 as a large number of 550 error lines. This bug was coincidentally fixed by
4383 increasing the size of one of Exim's internal buffers (big_buffer) that
4384 happened as part of the Exiscan merge. However, to be on the safe side, I
4385 have made the code more robust (and fixed the comments that describe what
4388 53. Now that there can be additional text after "Completed" in log lines (if
4389 the queue_time_overall log selector is set), a one-byte patch to exigrep
4390 was needed to allow it to recognize "Completed" as not the last thing in
4393 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4394 patch that reportedly fixes this has been added. I am not expert enough to
4395 create a test for it. This is what the patch creator wrote:
4397 "I found a little strange behaviour of ldap code when working with
4398 Windows 2003 AD Domain, where users was placed in more than one
4399 Organization Units. When I tried to give exim partial DN, the exit code
4400 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4401 But simultaneously result of request was absolutely normal ldap result,
4402 so I produce this patch..."
4404 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4405 REFERENCE, so I have modified the code to exclude the patch when that macro
4408 55. Some experimental protocols are using DNS PTR records for new purposes. The
4409 keys for these records are domain names, not reversed IP addresses. The
4410 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4411 leaves it alone. Component reversal etc. now happens only for IP addresses.
4414 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4416 57. Double the size of the debug message buffer (to 2048) so that more of very
4417 long debug lines gets shown.
4419 58. The exicyclog utility now does better if the number of log files to keep
4420 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4422 59. Two changes related to the smtp_active_hostname option:
4424 (1) $smtp_active_hostname is now available as a variable.
4425 (2) The default for smtp_banner uses $smtp_active_hostname instead
4426 of $primary_hostname.
4428 60. The host_aton() function is supposed to be passed a string that is known
4429 to be a valid IP address. However, in the case of IPv6 addresses, it was
4430 not checking this. This is a hostage to fortune. Exim now panics and dies
4431 if the condition is not met. A case was found where this could be provoked
4432 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4433 components; fortuitously, this particular loophole had already been fixed
4434 by change 4.50/55 above.
4436 If there are any other similar loopholes, the new check in host_aton()
4437 itself should stop them being exploited. The report I received stated that
4438 data on the command line could provoke the exploit when Exim was running as
4439 exim, but did not say which command line option was involved. All I could
4440 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4441 running as the user.
4444 61. There was a buffer overflow vulnerability in the SPA authentication code
4445 (which came originally from the Samba project). I have added a test to the
4446 spa_base64_to_bits() function which I hope fixes it.
4449 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4450 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4452 63. The daemon start-up calls getloadavg() while still root for those OS that
4453 need the first call to be done as root, but it missed one case: when
4454 deliver_queue_load_max is set with deliver_drop_privilege. This is
4455 necessary for the benefit of the queue runner, because there is no re-exec
4456 when deliver_drop_privilege is set.
4458 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4459 This has been fixed.
4461 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4462 was in use, was not putting the data itself into the right store pool;
4463 consequently, it could be overwritten for a subsequent message in the same
4464 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4467 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4469 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4470 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4471 the function were treating the return as a boolean value, which happened to
4472 work because 0=false and not-0=true, but is not correct code.
4474 68. The host_aton() function was not handling scoped IPv6 addresses (those
4475 with, for example, "%eth0" on the end) correctly.
4477 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4478 negated items (that is, ~something) in unsigned ints. Some compilers
4479 apparently mutter when there is no cast.
4481 70. If an address verification called from an ACL failed, and did not produce a
4482 user-specific message (i.e. there was only a "system" message), nothing was
4483 put in $acl_verify_message. In this situation, it now puts the system
4486 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4487 session; change 4.31/43 added the unwanted input to the log line - except
4488 that it did not do this in the start of session case. It now does.
4490 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4491 This is wrong and can cause the other end to generate a synchronization
4492 error if it is another Exim or anything else that does the synchronization
4493 check. A QUIT command is no longer sent after a timeout.
4495 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4496 during host lookups.
4498 74. The defer_ok option of callout verification was not working if it was used
4499 when verifying addresses in header lines, that is, for this case:
4501 verify = header_sender/callout=defer_ok
4503 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4504 those file descriptors could be used for SMTP connections. If anything
4505 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4506 could be sent to the SMTP client, causing chaos. The daemon now opens
4507 stdin, stdout, and stderr to /dev/null when it puts itself into the
4510 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4511 log by default. The user can override this with suitable Perl magic.
4513 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4514 the log message when discard triggers, was not working for the DATA ACL or
4515 for the non-SMTP ACL.
4517 78. Error message wording change in sieve.c.
4519 79. If smtp_accept_max_per_host was set, the number of connections could be
4520 restricted to fewer than expected, because the daemon was trying to set up
4521 a new connection before checking whether the processes handling previous
4522 connections had finished. The check for completed processes is now done
4523 earlier. On busy systems, this bug wouldn't be noticed because something
4524 else would have woken the daemon, and it would have reaped the completed
4527 80. If a message was submitted locally by a user whose login name contained one
4528 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4529 It caused a spool format error. I have fixed the spool reading code. A
4530 related problem was that the "from" clause in the Received: line became
4531 illegal because of the space(s). It is now covered by ${quote_local_part.
4533 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4536 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4538 83. Patch from Sieve maintainer to fix unterminated string problem in
4539 "vacation" handling.
4541 84. Some minor changes to the Linux configuration files to help with other
4542 OS variants using glibc.
4544 85. One more patch for Sieve to update vacation handling to latest spec.
4547 ----------------------------------------------------
4548 See the note above about the 4.44 and 4.50 releases.
4549 ----------------------------------------------------
4555 1. Change 4.43/35 introduced a bug that caused file counts to be
4556 incorrectly computed when quota_filecount was set in an appendfile
4559 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4560 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4563 3. Give more explanation in the error message when the command for a transport
4564 filter fails to execute.
4566 4. There are several places where Exim runs a non-Exim command in a
4567 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4568 was being done only for the command run by the queryprogram router. It is
4569 now done for all such subprocesses. The other cases are: ${run, transport
4570 filters, and the commands run by the lmtp and pipe transports.
4572 5. Some older OS have a limit of 256 on the maximum number of file
4573 descriptors. Exim was using setrlimit() to set 1000 as a large value
4574 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4575 systems. I've change it so that if it can't get 1000, it tries for 256.
4577 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4578 was an oversight, and furthermore, ever since the addition of extra
4579 controls (e.g. 4.43/32), the checks on when to allow different forms of
4580 "control" were broken. There should now be diagnostics for all cases when a
4581 control that does not make sense is encountered.
4583 7. $recipients is now available in the predata ACL (oversight).
4585 8. Tidy the search cache before the fork to do a delivery from a message
4586 received from the command line. Otherwise the child will trigger a lookup
4587 failure and thereby defer the delivery if it tries to use (for example) a
4588 cached ldap connection that the parent has called unbind on.
4590 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4591 of $address_data from the recipient verification was clobbered by the
4592 sender verification.
4594 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4595 was its contents. (It was OK if the option was not defined at all.)
4597 11. A "Completed" log line is now written for messages that are removed from
4598 the spool by the -Mrm option.
4600 12. $host_address is now set to the target address during the checking of
4601 ignore_target_hosts.
4603 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4604 being passed; this would have caused $sender_host_name to have been used if
4605 matching the list had actually called for a host name (not very likely,
4606 since this list is usually IP addresses). A host name is now passed as
4609 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4610 code that specifies a non-restarting handler (typically sigaction() in
4611 modern systems) in an attempt to fix a rare and obscure crash bug.
4613 15. Narrowed the window for a race in the daemon that could cause it to ignore
4614 SIGCHLD signals. This is not a major problem, because they are used only to
4615 wake it up if nothing else does.
4617 16. A malformed maildirsize file could cause Exim to calculate negative values
4618 for the mailbox size or file count. Odd effects could occur as a result.
4619 The maildirsize information is now recalculated if the size or filecount
4622 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4623 support for a long time. Removed HAVE_SYS_VFS_H.
4625 18. Updated exipick to current release from John Jetmore.
4627 19. Allow an empty sender to be matched against a lookup in an address list.
4628 Previously the only cases considered were a regular expression, or an
4631 20. Exim went into a mad DNS lookup loop when doing a callout where the
4632 host was specified on the transport, if the DNS lookup yielded more than
4635 21. The RFC2047 encoding function was originally intended for short strings
4636 such as real names; it was not keeping to the 75-character limit for
4637 encoded words that the RFC imposes. It now respects the limit, and
4638 generates multiple encoded words if necessary. To be on the safe side, I
4639 have increased the buffer size for the ${rfc2047: expansion operator from
4642 22. Failure to deliver a bounce message always caused it to be frozen, even if
4643 there was an errors_to setting on the router. The errors_to setting is now
4646 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4647 canonical form (fully expanded) before being placed in
4648 $sender_host_address.
4650 24. Updated eximstats to version 1.33
4652 25. Include certificate and key file names in error message when GnuTLS fails
4653 to set them up, because the GnuTLS error message doesn't include the name
4654 of the failing file when there is a problem reading it.
4656 26. Expand error message when OpenSSL has problems setting up cert/key files.
4659 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4660 (this can affect the format of dates).
4662 28. exim_tidydb, when checking for the continued existence of a message for
4663 which it has found a message-specific retry record, was not finding
4664 messages that were in split spool directories. Consequently, it was
4665 deleting retry records that should have stayed in existence.
4667 29. eximstats updated to version 1.35
4668 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4669 1.35 - bugfix such that pie charts by volume are generated correctly
4671 30. The SPA authentication driver was not abandoning authentication and moving
4672 on to the next authenticator when an expansion was forced to fail,
4673 contradicting the general specification for all authenticators. Instead it
4674 was generating a temporary error. It now behaves as specified.
4676 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4677 (the order specifies the preference for clients). The order is now AES256,
4678 AES128, 3DES, ARCFOUR128.
4680 31. Small patch to Sieve code - explicitly set From: when generating an
4683 32. Exim crashed if a remote delivery caused a very long error message to be
4684 recorded - for instance if somebody sent an entire SpamAssassin report back
4685 as a large number of 550 error lines. This bug was coincidentally fixed by
4686 increasing the size of one of Exim's internal buffers (big_buffer) that
4687 happened as part of the Exiscan merge. However, to be on the safe side, I
4688 have made the code more robust (and fixed the comments that describe what
4691 33. Some experimental protocols are using DNS PTR records for new purposes. The
4692 keys for these records are domain names, not reversed IP addresses. The
4693 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4694 leaves it alone. Component reversal etc. now happens only for IP addresses.
4697 34. The host_aton() function is supposed to be passed a string that is known
4698 to be a valid IP address. However, in the case of IPv6 addresses, it was
4699 not checking this. This is a hostage to fortune. Exim now panics and dies
4700 if the condition is not met. A case was found where this could be provoked
4701 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4702 components; fortuitously, this particular loophole had already been fixed
4703 by change 4.50/55 or 4.44/33 above.
4705 If there are any other similar loopholes, the new check in host_aton()
4706 itself should stop them being exploited. The report I received stated that
4707 data on the command line could provoke the exploit when Exim was running as
4708 exim, but did not say which command line option was involved. All I could
4709 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4710 running as the user.
4713 35. There was a buffer overflow vulnerability in the SPA authentication code
4714 (which came originally from the Samba project). I have added a test to the
4715 spa_base64_to_bits() function which I hope fixes it.
4718 36. The daemon start-up calls getloadavg() while still root for those OS that
4719 need the first call to be done as root, but it missed one case: when
4720 deliver_queue_load_max is set with deliver_drop_privilege. This is
4721 necessary for the benefit of the queue runner, because there is no re-exec
4722 when deliver_drop_privilege is set.
4724 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4725 was in use, was not putting the data itself into the right store pool;
4726 consequently, it could be overwritten for a subsequent message in the same
4727 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4730 38. Sometimes the final signoff response after QUIT could fail to get
4731 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4732 < 0 before doing a fflush(). This bug looks as though it goes back to the
4733 introduction of TLS in release 3.20, but "sometimes" must have been rare
4734 because the tests only now provoked it.
4740 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4741 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4742 Now it returns an integer. A number of calls were still expecting a T/F
4743 return. Fortuitously, in all cases, the tests worked in OK situations,
4744 which is the norm. However, things would have gone wrong on any write
4745 failures on the smtp file descriptor. This function is used when sending
4746 messages over SMTP and also when doing verify callouts.
4748 2. When Exim is called to do synchronous delivery of a locally submitted
4749 message (the -odf or -odi options), it no longer closes stderr before doing
4752 3. Implemented the mua_wrapper option.
4754 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4756 5. Implemented the functions header_remove(), header_testname(),
4757 header_add_at_position(), and receive_remove_recipient(), and exported them
4760 6. If an ACL "warn" statement specified the addition of headers, Exim already
4761 inserted X-ACL-Warn: at the start if there was no header name. However, it
4762 was not making this test for the second and subsequent header lines if
4763 there were newlines in the string. This meant that an invalid header could
4764 be inserted if Exim was badly configured.
4766 7. Allow an ACL "warn" statement to add header lines at the start or after all
4767 the Received: headers, as well as at the end.
4769 8. Added the rcpt_4xx retry error code.
4771 9. Added postmaster_mailfrom=xxx to callout verification option.
4773 10. Added mailfrom=xxxx to the callout verification option, for verify=
4776 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4777 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4779 12. Inserted some casts to stop certain compilers warning when using pointer
4780 differences as field lengths or precisions in printf-type calls (mostly
4781 affecting debugging statements).
4783 13. Added optional readline() support for -be (dynamically loaded).
4785 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4786 same clock tick as a message's arrival, so that its received time was the
4787 same as the "first fail" time on the retry record, and that message
4788 remained on the queue past the ultimate address timeout, every queue runner
4789 would try a delivery (because it was past the ultimate address timeout) but
4790 after another failure, the ultimate address timeout, which should have then
4791 bounced the address, did not kick in. This was a "< instead of <=" error;
4792 in most cases the first failure would have been in the next clock tick
4793 after the received time, and all would be well.
4795 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4796 being recognized when the domain list was tested by the match_domain
4797 condition in an expansion string.
4799 16. Added the ${str2b64: operator.
4801 17. Exim was always calling setrlimit() to set a large limit for the number of
4802 processes, without checking whether the existing limit was already
4803 adequate. (It did check for the limit on file descriptors.) Furthermore,
4804 errors from getrlimit() and setrlimit() were being ignored. Now they are
4805 logged to the main and panic logs, but Exim does carry on, to try to do its
4806 job under whatever limits there are.
4808 18. Imported PCRE 5.0.
4810 19. Trivial typo in log message " temporarily refused connection" (the leading
4813 20. If the log selector return_path_on_delivery was set and an address was
4814 redirected to /dev/null, the delivery process crashed because it assumed
4815 that a return path would always be set for a "successful" delivery. In this
4816 case, the whole delivery is bypassed as an optimization, and therefore no
4819 21. Internal re-arrangement: the function for sending a challenge and reading
4820 a response while authentication was assuming a zero-terminated challenge
4821 string. It's now changed to take a pointer and a length, to allow for
4822 binary data in such strings.
4824 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4826 23. Exim was not respecting finduser_retries when seeking the login of the
4827 uid under which it was called; it was always trying 10 times. (The default
4828 setting of finduser_retries is zero.) Also, it was sleeping after the final
4829 failure, which is pointless.
4831 24. Implemented tls_on_connect_ports.
4833 25. Implemented acl_smtp_predata.
4835 26. If the domain in control=submission is set empty, Exim assumes that the
4836 authenticated id is a complete email address when it generates From: or
4837 Sender: header lines.
4839 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4840 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4841 chown and chgrp in /bin and hostname in /usr/bin.
4843 28. Exim was keeping the "process log" file open after each use, just as it
4844 does for the main log. This opens the possibility of it remaining open for
4845 long periods when the USR1 signal hits a daemon. Occasional processlog
4846 errors were reported, that could have been caused by this. Anyway, it seems
4847 much more sensible not to leave this file open at all, so that is what now
4850 29. The long-running daemon process does not normally write to the log once it
4851 has entered its main loop, and it closes the log before doing so. This is
4852 so that log files can straightforwardly be renamed and moved. However,
4853 there are a couple of unusual error situations where the daemon does write
4854 log entries, and I had neglected to close the log afterwards.
4856 30. The text of an SMTP error response that was received during a remote
4857 delivery was being truncated at 512 bytes. This is too short for some of
4858 the long messages that one sometimes sees. I've increased the limit to
4861 31. It is now possible to make retry rules that apply only when a message has a
4862 specific sender, in particular, an empty sender.
4864 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4865 it possible to be selective about when SMTP synchronization is enforced.
4867 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4869 32. Implemented hosts_connection_nolog.
4871 33. Added an ACL for QUIT.
4873 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4876 35. Added mailbox_size and mailbox_filecount to appendfile.
4878 36. Added control = no_multiline_responses to ACLs.
4880 37. There was a bug in the logic of the code that waits for the clock to tick
4881 in the case where the clock went backwards by a substantial amount such
4882 that the microsecond fraction of "now" was more than the microsecond
4883 fraction of "then" (but the whole seconds number was less).
4885 38. Added support for the libradius Radius client library this is found on
4886 FreeBSD (previously only the radiusclient library was supported).
4892 1. When certain lookups returned multiple values in the form name=value, the
4893 quoting of the values was not always being done properly. Specifically:
4894 (a) If the value started with a double quote, but contained no whitespace,
4896 (b) If the value contained whitespace other than a space character (i.e.
4897 tabs or newlines or carriage returns) it was not quoted.
4898 This fix has been applied to the mysql and pgsql lookups by writing a
4899 separate quoting function and calling it from the lookup code. The fix
4900 should probably also be applied to nisplus, ibase and oracle lookups, but
4901 since I cannot test any of those, I have not disturbed their existing code.
4903 2. A hit in the callout cache for a specific address caused a log line with no
4904 reason for rejecting RCPT. Now it says "Previous (cached) callout
4905 verification failure".
4907 3. There was an off-by-one bug in the queryprogram router. An over-long
4908 return line was truncated at 256 instead of 255 characters, thereby
4909 overflowing its buffer with the terminating zero. As well as fixing this, I
4910 have increased the buffer size to 1024 (and made a note to document this).
4912 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4913 when Exim is waiting for an SMTP response from a remote server, Exim
4914 restarts its select() call on the socket, thereby resetting its timeout.
4915 This is not a problem when such interrupts are rare. Somebody set up a cron
4916 job to run exiwhat every 2 minutes, which is less than the normal select()
4917 timeout (5 or 10 minutes). This meant that the select() timeout never
4918 kicked in because it was always reset. I have fixed this by comparing the
4919 time when an interrupt arrives with the time at the start of the first call
4920 to select(). If more time than the timeout has elapsed, the interrupt is
4921 treated as a timeout.
4923 5. Some internal re-factoring in preparation for the addition of Sieve
4924 extensions (by MH). In particular, the "personal" test is moved to a
4925 separate function, and given an option for scanning Cc: and Bcc: (which is
4926 not set for Exim filters).
4928 6. When Exim created an email address using the login of the caller as the
4929 local part (e.g. when creating a From: or Sender: header line), it was not
4930 quoting the local part when it contained special characters such as @.
4932 7. Installed new OpenBSD configuration files.
4934 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4935 try to make them clearer.
4937 9. Callout options, other than the timeout value, were being ignored when
4938 verifying sender addresses in header lines. For example, when using
4940 verify = header_sender/callout=no_cache
4942 the cache was (incorrectly) being used.
4944 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4945 only the Cygwin environment.
4947 11. When return_path_on_delivery was set as a log selector, if different remote
4948 addresses in the same message used different return paths and parallel
4949 remote delivery occurred, the wrong values would sometimes be logged.
4950 (Whenever a remote delivery process finished, the return path value from
4951 the most recently started remote delivery process was logged.)
4953 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4954 lines when AUTH and/or TLS are in use. This is the "received protocol"
4955 field. Exim used to use "asmtp" for authenticated SMTP, without any
4956 indication (in the protocol name) for TLS use. Now it follows the RFC and
4957 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4958 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4959 names appear in log lines as well as in Received: header lines.
4961 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4962 extensions, and comparison tests, and to fix some bugs.
4964 14. Changes to the "personal" filter test:
4966 (1) The test was buggy in that it was just doing the equivalent of
4967 "contains" tests on header lines. For example, if a user's address was
4968 anne@some.where, the "personal" test would incorrectly be true for
4970 To: susanne@some.where
4972 This test is now done by extracting each address from the header in turn,
4973 and checking the entire address. Other tests that are part of "personal"
4974 are now done using regular expressions (for example, to check local parts
4975 of addresses in From: header lines).
4977 (2) The list of non-personal local parts in From: addresses has been
4978 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4979 taken from the Sieve specification recommendations.
4981 (3) If the message contains any header line starting with "List-" it is
4982 treated as non-personal.
4984 (4) The test for "circular" in the Subject: header line has been removed
4985 because it now seems ill-conceived.
4987 15. Minor typos in src/EDITME comments corrected.
4989 16. Installed latest exipick from John Jetmore.
4991 17. If headers_add on a router specified a text string that was too long for
4992 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4993 of string_sprintf() is now avoided.
4995 18. $message_body_size was not set (it was always zero) when running the DATA
4996 ACL and the local_scan() function.
4998 19. For the "mail" command in an Exim filter, no default was being set for
4999 the once_repeat time, causing a random time value to be used if "once" was
5000 specified. (If the value happened to be <= 0, no repeat happened.) The
5001 default is now 0s, meaning "never repeat". The "vacation" command was OK
5002 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5003 (I found it when inspecting the code).
5005 20. There is now an overall timeout for performing a callout verification. It
5006 defaults to 4 times the callout timeout, which applies to individual SMTP
5007 commands during the callout. The overall timeout applies when there is more
5008 than one host that can be tried. The timeout is checked before trying the
5009 next host. This prevents very long delays if there are a large number of
5010 hosts and all are timing out (e.g. when the network connections are timing
5011 out). The value of the overall timeout can be changed by specifying an
5012 additional sub-option for "callout", called "maxwait". For example:
5014 verify = sender/callout=5s,maxwait=20s
5016 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5017 to the end before writing, but this should make it even safer).
5019 22. Exim was forgetting that it had advertised PIPELINING for the second and
5020 subsequent messages on an SMTP connection. It was also not resetting its
5021 memory on STARTTLS and an internal HELO.
5023 23. When Exim logs an SMTP synchronization error within a session, it now
5024 records whether PIPELINING has been advertised or not.
5026 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5027 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5028 rather than long int.
5030 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5032 26. Added the never_mail option to autoreply.
5038 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5039 crash if the getsockname() call failed; this can happen if a connection is
5040 closed very soon after it is established. The problem was simply in the
5041 order in which certain operations were done, causing Exim to try to write
5042 to the SMTP stream before it had set up the file descriptor. The bug has
5043 been fixed by making things happen in the correct order.
5049 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5050 before the connection was closed, thus losing the rejection response.
5052 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5053 some early Solaris releases, but causes trouble in current releases where
5054 socklen_t is defined.
5056 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5059 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5062 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5063 that releasing the top of it at the end releases what was used for sub-
5064 expansions (unless the block got too big). However, discard this block if
5065 the first thing is a variable or header, so that we can use its block when
5066 it is dynamic (useful for very large $message_headers, for example).
5068 6. Lookups now cache *every* query, not just the most recent. A new, separate
5069 store pool is used for this. It can be recovered when all lookup caches are
5070 flushed. Lookups now release memory at the end of their result strings.
5071 This has involved some general refactoring of the lookup sources.
5073 7. Some code has been added to the store_xxx() functions to reduce the amount
5074 of flapping under certain conditions.
5076 8. log_incoming_interface used to affect only the <= reception log lines. Now
5077 it causes the local interface and port to be added to several more SMTP log
5078 lines, for example "SMTP connection from", and rejection lines.
5080 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5082 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5084 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5085 could be overwritten at the end of the current message (or the start of a
5086 new message if it was set in a HELO ACL). The value is now preserved for
5087 the duration of the SMTP connection.
5089 12. If a transport had a headers_rewrite setting, and a matching header line
5090 contained an unqualified address, that address was qualified, even if it
5091 did not match any rewriting rules. The underlying bug was that the values
5092 of the flags that permit the existence of unqualified sender and recipient
5093 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5094 non-local messages, and by -bnq for local messages) were not being
5095 preserved with the message after it was received.
5097 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5098 "next input=" as part of the text comprising the host identity instead of
5099 the correct text. The code was using the same buffer for two different
5100 strings. However, depending on which order the printing function evaluated
5101 its arguments, the bug did not always show up. Under Linux, for example, my
5102 test suite worked just fine.
5104 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5105 doesn't work with some older versions of Perl. It has been changed to "my",
5106 which in any case is probably the better facility to use.
5108 15. A really picky compiler found some instances of statements for creating
5109 error messages that either had too many or two few arguments for the format
5112 16. The size of the buffer for calls to the DNS resolver has been increased
5113 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5114 for addresses that have a lot of PTR records. This alleviates a problem; it
5115 does not fully solve it.
5117 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5118 buffer now truncates the list and logs the incident, which is the same
5119 action as happens when Exim is looking up a host name and its aliases.
5120 Previously in this situation something unpredictable would happen;
5121 sometimes it was "internal error: store_reset failed".
5123 18. If a server dropped the connection unexpectedly when an Exim client was
5124 using GnuTLS and trying to read a response, the client delivery process
5125 crashed while trying to generate an error log message.
5127 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5128 string, for example:
5130 warn message = H1: something\nH2: something
5132 the text was added as a single header line from Exim's point of view
5133 though it ended up OK in the delivered message. However, searching for the
5134 second and subsequent header lines using $h_h2: did not work. This has been
5135 fixed. Similarly, if a system filter added multiple headers in this way,
5136 the routers could not see them.
5138 20. Expanded the error message when iplsearch is called with an invalid key to
5139 suggest using net-iplsearch in a host list.
5141 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5142 ACLs are no longer actually imposed (and a message to that effect is
5145 22. If a "gecos" field in a passwd entry contained escaped characters, in
5146 particular, if it contained a \" sequence, Exim got it wrong when building
5147 a From: or a Sender: header from that name. A second bug also caused
5148 incorrect handling when an unquoted " was present following a character
5149 that needed quoting.
5151 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5152 was not being matched caselessly.
5154 24. Arranged for all hyphens in the exim.8 source to be escaped with
5157 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5158 properly. Recipient callout cache records were still being keyed to include
5159 the sender, even when use_sender was set false. This led to far more
5160 callouts that were necessary. The sender is no longer included in the key
5161 when use_sender is false.
5163 26. Added "control = submission" modifier to ACLs.
5165 27. Added the ${base62d: operator to decode base 62 numbers.
5167 28. dnsdb lookups can now access SRV records.
5169 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5170 the configuration file.
5172 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5173 (-v) mode. This makes the output for a verbose queue run more intelligible.
5175 31. Added a use_postmaster feature to recipient callouts.
5177 32. Added the $body_zerocount variable, containing the number of binary zero
5178 bytes in the message body.
5180 33. The time of last modification of the "new" subdirectory is now used as the
5181 "mailbox time last read" when there is a quota error for a maildir
5184 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5186 35. Added +ignore_unknown as a special item in host lists.
5188 36. Code for decoding IPv6 addresses in host lists is now included, even if
5189 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5190 address was recognized as an IP address, but was then not correctly decoded
5191 into binary, causing unexpected and incorrect effects when compared with
5198 1. Very minor rewording of debugging text in manualroute to say "list of
5199 hosts" instead of "hostlist".
5201 2. If verify=header_syntax was set, and a header line with an unqualified
5202 address (no domain) and a large number of spaces between the end of the
5203 name and the colon was received, the reception process suffered a buffer
5204 overflow, and (when I tested it) crashed. This was caused by some obsolete
5205 code that should have been removed. The fix is to remove it!
5207 3. When running in the test harness, delay a bit after writing a bounce
5208 message to get a bit more predictability in the log output.
5210 4. Added a call to search_tidyup() just before forking a reception process. In
5211 theory, someone could use a lookup in the expansion of smtp_accept_max_
5212 per_host which, without the tidyup, could leave open a database connection.
5214 5. Added the variables $recipient_data and $sender_data which get set from a
5215 lookup success in an ACL "recipients" or "senders" condition, or a router
5216 "senders" option, similar to $domain_data and $local_part_data.
5218 6. Moved the writing of debug_print from before to after the "senders" test
5221 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5222 problems for message scanning, either using a data ACL, or using
5223 local_scan() because the Received: header was not generated till after they
5224 were called (in order to set the time as the time of reception completion).
5225 I have revised the way this works. The header is now generated after the
5226 body is received, but before the ACL or local_scan() are called. After they
5227 are run, the timestamp in the header is updated.
5233 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5234 before starting a queue runner without re-exec. This happened only when
5235 deliver_drop_privilege was set or when the Exim user was set to root. The
5236 effect of the bug was that timeouts during subsequent deliveries caused
5237 crashes instead of being properly handled. The handler is now left at its
5238 default (and expected) setting.
5240 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5241 message, again when deliver_drop_privilege is set or Exim is run as root.
5242 The bug described in (1) was not present in this case, but the tidying up
5243 of the other signals was missing. I have made the two cases consistent.
5245 3. The ignore_target_hosts setting on a manualroute router was being ignored
5246 for hosts that were looked up using the /MX notation.
5248 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5251 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5252 operated on the sender address. After changing the $sender_address to <>
5253 for the sender address verify, Exim was re-instated it as the original
5254 (before rewriting) address, but remembering that it had rewritten it, so it
5255 wasn't rewriting it again. This bug also had the effect of breaking the
5256 sender address verification caching when the sender address was rewritten.
5258 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5259 This has been changed so that if the ip literal address matches
5260 ignore_target_hosts, the router declines.
5262 7. Added expansion conditions match_domain, match_address, and match_local_
5263 part (NOT match_host).
5265 8. The placeholder for the Received: header didn't have a length field set.
5267 9. Added code to Exim itself and to exim_lock to test for a specific race
5268 condition that could lead to file corruption when using MBX delivery. The
5269 issue is with the lockfile that is created in /tmp. If this file is removed
5270 after a process has opened it but before that process has acquired a lock,
5271 there is the potential for a second process to recreate the file and also
5272 acquire a lock. This could lead to two Exim processes writing to the file
5273 at the same time. The added code performs the same test as UW imapd; it
5274 checks after acquiring the lock that its file descriptor still refers to
5275 the same named file.
5277 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5278 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5281 11. Added the smtp_active_hostname option. If used, this will typically be made
5282 to depend on the incoming interface address. Because $interface_address is
5283 not set up until the daemon has forked a reception process, error responses
5284 that can happen earlier (such as "too many connections") no longer contain
5287 12. If an expansion in a condition on a "warn" statement fails because a lookup
5288 defers, the "warn" statement is abandoned, and the next ACL statement is
5289 processed. Previously this caused the whole ACL to be aborted.
5291 13. Added the iplsearch lookup type.
5293 14. Added ident_timeout as a log selector.
5295 15. Added tls_certificate_verified as a log selector.
5297 16. Added a global option tls_require_ciphers (compare the smtp transport
5298 option of the same name). This controls incoming TLS connections.
5300 17. I finally figured out how to make tls_require_ciphers do a similar thing
5301 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5302 before starting the TLS session.
5304 18. Tabs are now shown as \t in -bP output.
5306 19. If the log selector return_path_on_delivery was set, Exim crashed when
5307 bouncing a message because it had too many Received: header lines.
5309 20. If two routers both had headers_remove settings, and the first one included
5310 a superfluous trailing colon, the final name in the first list and the
5311 first name in the second list were incorrectly joined into one item (with a
5312 colon in the middle).
5318 1. Added -C and -D options to the exinext utility, mainly to make it easier
5319 to include in the automated testing, but these could be helpful when
5320 multiple configurations are in use.
5322 2. The exinext utility was not formatting the output nicely when there was
5323 an alternate port involved in the retry record key, nor when there was a
5324 message id as well (for retries that were specific to a specific message
5325 and a specific host). It was also confused by IPv6 addresses, because of
5326 the additional colons they contain. I have fixed the IPv4 problem, and
5327 patched it up to do a reasonable job for IPv6.
5329 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5330 delivery, the log line now contains "pipelined" if PIPELINING was used.
5332 4. An SMTP transport process used to panic and die if the bind() call to set
5333 an explicit outgoing interface failed. This has been changed; it is now
5334 treated in the same way as a connect() failure.
5336 5. A reference to $sender_host_name in the part of a conditional expansion
5337 that was being skipped was still causing a DNS lookup. This no longer
5340 6. The def: expansion condition was not recognizing references to header lines
5341 that used bh_ and bheader_.
5343 7. Added the _cache feature to named lists.
5345 8. The code for checking quota_filecount in the appendfile transport was
5346 allowing one more file than it should have been.
5348 9. For compatibility with Sendmail, the command line option
5356 and sets the incoming protocol and host name (for trusted callers). The
5357 host name and its colon can be omitted when only the protocol is to be set.
5358 Note the Exim already has two private options, -pd and -ps, that refer to
5359 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5360 "s", but I don't think that's a major issue.
5362 10. A number of refactoring changes to the code, none of which should affect
5365 (a) The number of logging options was getting close to filling up the
5366 32-bit word that was used as a bit map. I have split them into two classes:
5367 those that are passed in the argument to log_write(), and those that are
5368 only ever tested independently outside of that function. These are now in
5369 separate 32-bit words, so there is plenty of room for expansion again.
5370 There is no change in the user interface or the logging behaviour.
5372 (b) When building, for example, log lines, the code previously used a
5373 macro that called string_cat() twice, in order to add two strings. This is
5374 not really sufficiently general. Furthermore, there was one instance where
5375 it was actually wrong because one of the argument was used twice, and in
5376 one call a function was used. (As it happened, calling the function twice
5377 did not affect the overall behaviour.) The macro has been replaced by a
5378 function that can join an arbitrary number of extra strings onto a growing
5381 (c) The code for expansion conditions now uses a table and a binary chop
5382 instead of a serial search (which was left over from when there were very
5383 few conditions). Also, it now recognizes conditions like "pam" even when
5384 the relevant support is not compiled in: a suitably worded error message is
5385 given if an attempt is made to use such a condition.
5387 11. Added ${time_interval:xxxxx}.
5389 12. A bug was causing one of the ddress fields not to be passed back correctly
5390 from remote delivery subprocesses. The field in question was not being
5391 subsequently used, so this caused to problems in practice.
5393 13. Added new log selectors queue_time and deliver_time.
5395 14. Might have fixed a bug in maildirsizefile handling that threw up
5396 "unexpected character" debug warnings, and recalculated the data
5397 unnecessarily. In any case, I expanded the warning message to give more
5400 15. Added the message "Restricted characters in address" to the statements in
5401 the default ACL that block characters like @ and % in local parts.
5403 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5404 Three changes have been made:
5406 (a) There was a serious bug; a negative response to MAIL caused the whole
5407 recipient domain to be cached as invalid, thereby blocking all messages
5408 to all local parts at the same domain, from all senders. This bug has
5409 been fixed. The domain is no longer cached after a negative response to
5410 MAIL if the sender used is not empty.
5412 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5415 (c) A new callout option, "use_sender" has been added for people who want
5416 the modified behaviour.
5422 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5425 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5426 indeed breaks things for older releases.
5428 3. Added additional logging to the case where there is a problem reading data
5429 from a filter that is running in a subprocess using a pipe, in order to
5430 try to track down a specific problem.
5432 4. Testing facility fudge: when running in the test harness and attempting
5433 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5434 getting "No route to host". Convert this to a timeout.
5436 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5439 6. Some OS don't have socklen_t but use size_t instead. This affects the
5440 fifth argument of getsockopt() amongst other things. This is now
5441 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5442 can be set for individual OS. I have set it for SunOS5, OSF1, and
5443 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5444 some earlier ones do not.
5446 7. Change 4.30/15 was not doing the test caselessly.
5448 8. The standard form for an IPv6 address literal was being rejected by address
5449 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5450 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5451 this, as well as the form without the "IPv6" on the front (but only when
5452 address literals are enabled, of course).
5454 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5456 10. Exim crashed if a message with an empty sender address specified by -f
5457 encountered a router with an errors_to setting. This could be provoked only
5458 by a command such as
5462 where an empty string was supplied; "<>" did not hit this bug.
5464 11. Installed PCRE release 4.5.
5466 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5467 remained set. It is now erased.
5469 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5470 times from message ids (which are base 36 rather than the normal 62).
5472 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5473 were being counted as actual protocol errors, and logged if the log
5474 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5475 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5476 and DATA following a set of rejected RCPTs do not count as protocol errors.
5477 In other words, Exim assumes they were pipelined, though this may not
5478 actually be the case. Of course, in all cases the client gets an
5479 appropriate error code.
5481 15. If a lookup fails in an ACL condition, a message about the failure may
5482 be available; it is used if testing the ACL cannot continue, because most
5483 such messages specify what the cause of the deferral is. However, some
5484 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5485 that caused an old message to be retained and used if a later statement
5486 caused a defer, replacing the real cause of the deferral.
5488 16. If an IP address had so many PTR records that the DNS lookup buffer
5489 was not large enough to hold them, Exim could crash while trying to process
5490 the truncated data. It now detects and logs this case.
5492 17. Further to 4.21/58, another change has been made: if (and only if) the
5493 first line of a message (the first header line) ends with CRLF, a bare LF
5494 in a subsequent header line has a space inserted after it, so as not to
5495 terminate the header.
5497 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5498 unnecessarily, used atoi() instead of strtol(), and didn't check the
5499 termination when getting file sizes from file names by regex.
5501 19. Completely re-implemented the support for maildirsize files, in the light
5502 of a number of problems with the previous contributed implementation
5503 (4.30/29). In particular:
5505 . If the quota is zero, the maildirsize file is maintained, but no quota is
5508 . If the maildir directory does not exist, it is created before any attempt
5509 to write a maildirsize file.
5511 . The quota value in the file is just a cache; if the quota is changed in
5512 the transport, the new value overrides.
5514 . A regular expression is available for excluding directories from the
5517 20. The autoreply transport checks the characters in options that define the
5518 message's headers; it allows continued headers, but it was checking with
5519 isspace() after an embedded newline instead of explicitly looking for a
5522 21. If all the "regular" hosts to which an address was routed had passed their
5523 expiry times, and had not reached their retry times, the address was
5524 bounced, even if fallback hosts were defined. Now Exim should go on to try
5527 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5528 equivalent code in the SMTP transport. Some hosts send humungous responses
5529 to HELO/EHLO, more than 1024 it seems.
5531 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5532 gives compiler warnings in some environments. I've now done it "properly",
5535 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5536 (because of problems with the built-in one) was declared to return uschar *
5537 instead of char *, causing compiler failure.
5539 25. Fixed a file descriptor leak when processing alias/forward files.
5541 26. Fixed a minor format string issue in dbfn.c.
5543 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5545 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5546 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5549 29. When a sender address is verified, it is cached, to save repeating the test
5550 when there is more than one recipient in a message. However, when the
5551 verification involves a callout, it is possible for different callout
5552 options to be set for different recipients. It is too complicated to keep
5553 track of this in the cache, so now Exim always runs a verification when a
5554 callout is required, relying on the callout cache for the optimization.
5555 The overhead is duplication of the address routing, but this should not be
5558 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5559 to be verified with callout=postmaster, and the main callout worked but the
5560 postmaster check failed, the verification correctly failed. However, if a
5561 subsequent RCPT command asked for sender verification *without* the
5562 postmaster check, incorrect caching caused this verification also to fail,
5565 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5566 it was not caching the DNS options (qualify_single, search_parents) that
5567 were used when the lookup failed. A subsequent lookup with different
5568 options therefore always gave the same answer, though there were cases
5569 where it should not have. (Example: a "domains = !$mx_any" option on a
5570 dnslookup router: the "domains" option is always processed without any
5571 widening, but the router might have qualify_single set.) Now Exim uses the
5572 cached value only when the same options are set.
5574 32. Added John Jetmore's "exipick" utility to the distribution.
5576 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5577 than a timeout (e.g. a certificate is required, and is not provided), an
5578 Exim server now closes the connection immediately. Previously it waited for
5579 the client to close - but if the client is SSL, it seems that they each
5580 wait for each other, leading to a delay before one of them times out.
5582 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5583 maintained 0.8.x compatibility because I don't think many are using it, and
5584 it is clearly obsolete.
5586 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5589 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5590 client certificate was expired. A simple patch fixes this, though I don't
5591 understand the full logic of why the verify callback is called multiple
5594 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5595 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5596 which causes problems with some clients (such as the Certicom SSL Plus
5597 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5598 disables the coutermeasure allowing Eudora to connect."
5600 38. Exim was not checking that a write() to a log file succeeded. This could
5601 lead to Bad Things if a log got too big, in particular if it hit a file
5602 size limit. Exim now panics and dies if it cannot write to a log file, just
5603 as it does if it cannot open a log file.
5605 39. Modified OS/Makefile-Linux so that it now contains
5607 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5609 The two -D definitions ensure that Exim is compiled with large file
5610 support, which makes it possible to handle log files that are bigger than
5613 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5614 instance) a domain was checked against a named list that involved a lookup,
5615 causing $domain_data to be set, then another domain was checked against the
5616 same list, then the first domain was re-checked, the value of $domain_data
5617 after the final check could be wrong. In particular, if the second check
5618 failed, it could be set empty. This bug probably also applied to
5621 41. The strip_trailing_dot option was not being applied to the address given
5622 with the -f command-line option.
5624 42. The code for reading a message's header from the spool was incrementing
5625 $received_count, but never initializing it. This meant that the value was
5626 incorrect (doubled) while delivering a message in the same process in which
5627 it was received. In the most common configuration of Exim, this never
5628 happens - a fresh exec is done - but it can happen when
5629 deliver_drop_privilege is set.
5631 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5632 it now includes up to 150 characters of the unexpected data in the log
5635 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5636 and building data strings. The size of both of these buffers was 10 000
5637 bytes - far larger than anybody would *ever* want, thought I. Needless to
5638 say, somebody hit the limit. I have increased the maximum line length to
5639 20 000 and the maximum data length of concatenated lines to 100 000. I have
5640 also fixed two bugs, because there was no checking on these buffers. Tsk,
5641 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5642 buffer is too small.
5644 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5645 lsearch lookups. Now it does.
5647 46. When parsing a route_list item in a manualroute router, a fixed-length
5648 buffer was used for the list of hosts. I made this 1024 bytes long,
5649 thinking that nobody would ever have a list of hosts that long. Wrong.
5650 Somebody had a whole pile of complicated expansion conditions, and the
5651 string was silently truncated, leading to an expansion error. It turns out
5652 that it is easier to change to an unlimited length (owing to other changes
5653 that have happened since this code was originally written) than to build
5654 structure for giving a limitation error. The length of the item that
5655 expands into the list of hosts is now unlimited.
5657 47. The lsearch lookup could not handle data where the length of text line was
5658 more than 4095 characters. Such lines were truncated, leading to shortened
5659 data being returned. It should now handle lines of any length.
5661 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5662 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5665 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5666 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5667 no longer happens in comment lines. A list of replacements is now placed
5668 at the head of all of the source files, except those whose only change is
5669 to replace PERL_COMMAND in the very first #! line.
5671 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5672 messages on the queue, with a bottom-up merge sort, using code contributed
5673 by Michael Haardt. This should make operations like -bp somewhat faster on
5674 large queues. It won't affect queue runners, except when queue_run_in_order
5677 51. Installed eximstats 1.31 in the distribution.
5679 52. Added support for SRV lookups to the dnslookup router.
5681 53. If an ACL referred to $message_body or $message_body_end, the value was not
5682 reset for any messages that followed in the same SMTP session.
5684 54. The store-handling optimization for building very long strings was not
5685 differentiating between the different store pools. I don't think this
5686 actually made any difference in practice, but I've tidied it.
5688 55. While running the routers to verify a sender address, $sender_address
5689 was still set to the sender address. This is wrong, because when routing to
5690 send a bounce to the sender, it would be empty. Therefore, I have changed
5691 it so that, while verifying a sender address, $sender_address is set to <>.
5692 (There is no change to what happens when verifying a recipient address.)
5694 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5695 target A or AAAA records (if not already returned) without resetting the
5696 qualify_single or search_parents options of the DNS resolver. These are
5697 inappropriate in this case because the targets of MX and SRV records must
5698 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5699 target that, when qualified, matched something in the local domain. These
5700 two options are now turned off when doing these lookups.
5702 57. It seems that at least some releases of Reiserfs (which does not have the
5703 concept of a fixed number of inodes) returns zero and not -1 for the
5704 number of available inodes. This interacted badly with check_spool_inodes,
5705 which assumed that -1 was the "no such thing" setting. What I have done is
5706 to check that the total number of inodes is greater than zero before doing
5707 the test of how many are available.
5709 58. When a "warn" ACL statement has a log_message modifier, the message is
5710 remembered, and not repeated. This is to avoid a lot of repetition when a
5711 message has many recipients that cause the same warning to be written.
5712 However, Exim was preserving the list of already written lines for an
5713 entire SMTP session, which doesn't seem right. The memory is now reset if a
5714 new message is started.
5716 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5717 debugging output unless log_rewrite was also set.
5719 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5720 of (int)(handle) when we know that handle contains (void *)(-1).
5722 61. The Exim daemon panic-logs an error return when it closes the incoming
5723 connection. However "connection reset by peer" seems to be common, and
5724 isn't really an error worthy of noting specially, so that particular error
5727 62. When Exim is trying to find all the local interfaces, it used to panic and
5728 die if the ioctl to get the interface flags failed. However, it seems that
5729 on at least one OS (Solaris 9) it is possible to have an interface that is
5730 included in the list of interfaces, but for which you get a failure error
5731 for this call. This happens when the interface is not "plumbed" into a
5732 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5733 failure of the "get flags" call assumes that the interface is down.
5735 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5736 makes life easier for people who are doing arithmetic on fields extracted
5737 from dates, where you often get leading zeros that should not be
5738 interpreted as octal.
5740 64. Added qualify_domain to the redirect router, to override the global
5743 65. If a pathologically long header line contained very many addresses (the
5744 report of this problem mentioned 10 000) and each of them was rewritten,
5745 Exim could use up a very large amount of memory. (It kept on making new
5746 copies of the header line as it rewrote, and never released the old ones.)
5747 At the expense of a bit more processing, the header rewriting function has
5748 been changed so that it no longer eats memory in this way.
5750 66. The generation of the Received: header has been moved from the time that a
5751 message starts to be received, to the time that it finishes. The timestamp
5752 in the Received: header should now be very close to that of the <= log
5753 line. There are two side-effects of this change:
5755 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5756 logged header lines no longer include the local Received: line, because
5757 it has not yet been created. The same applies to a copy of the message
5758 that is returned to a non-SMTP sender when a message is rejected.
5760 (b) When a filter file is tested using -bf, no additional Received: header
5761 is added to the test message. After some thought, I decided that this
5764 This change does not affect the value of $received_for. It is still set
5765 after address rewriting, but before local_scan() is called.
5767 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5769 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5770 gave an unhelpful panic error message, and a defer error. I have managed to
5771 change this behaviour so that it now rejects any supplied certificate,
5772 which seems right, as the list of acceptable certificates is empty.
5774 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5775 gave an unhelpful defer error. I have not managed to make this reject any
5776 supplied certificates, but the error message it gives is "no certificate
5777 supplied", which is not helpful.
5779 70. exigrep's output now also includes lines that are not associated with any
5780 message, but which match the given pattern. Implemented by a patch from
5781 Martin Sluka, which also tidied up the Perl a bit.
5783 71. Recipient callout verification, like sender verification, was using <> in
5784 the MAIL FROM command. This isn't really the right thing, since the actual
5785 sender may affect whether the remote host accepts the recipient or not. I
5786 have changed it to use the actual sender in the callout; this means that
5787 the cache record is now keyed on a recipient/sender pair, not just the
5788 recipient address. There doesn't seem to be a real danger of callout loops,
5789 since a callout by the remote host to check the sender would use <>.
5790 [SEE ABOVE: changed after hitting problems.]
5792 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5793 temporary errors. However, in the case of such a code being given after
5794 the end of a data transmission (i.e. after ".") Exim was failing to write
5795 a retry record for the message. (Yes, there was some broken host that was
5796 actually sending 8xx at this point.)
5798 73. An unknown lookup type in a host list could cause Exim to panic-die when
5799 the list was checked. (An example that provoked this was putting <; in the
5800 middle of a list instead of at the start.) If this happened during a DATA
5801 ACL check, a -D file could be left lying around. This kind of configuration
5802 error no longer causes Exim to die; instead it causes a defer error. The
5803 incident is still logged to the main and panic logs.
5805 74. Buglet left over from Exim 3 conversion. The message "too many messages
5806 in one connection" was written to the rejectlog but not the mainlog, except
5807 when address rewriting (yes!) was being logged.
5809 75. Added write_rejectlog option.
5811 76. When a system filter was run not as root (that is, when system_filter_user
5812 was set), the values of the $n variables were not being returned to the
5813 main process; thus, they were not subsequently available in the $sn
5816 77. Added +return_path_on_delivery log selector.
5818 78. A connection timeout was being treated differently from recipients deferred
5819 when testing hosts_max_try with a message that was older than the host's
5820 retry timeout. (The host should not be counted, thus allowing all hosts to
5821 be tried at least once before bouncing.) This may have been the cause of an
5822 occasionally reported bug whereby a message would remain on the queue
5823 longer than the retry timeout, but would be bounced if a delivery was
5824 forced. I say "may" because I never totally pinned down the problem;
5825 setting up timeout/retry tests is difficult. See also the next item.
5827 79. The ultimate address timeout was not being applied to errors that involved
5828 a combination of host plus message (for example, a timeout on a MAIL
5829 command). When an address resolved to a number of possible hosts, and they
5830 were not all tried for each delivery (e.g. because of hosts_max_try), a
5831 message could remain on the queue longer than the retry timeout.
5833 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5836 81. Fixed an obscure SMTP outgoing bug which required at least the following
5837 conditions: (a) there was another message waiting for the same server;
5838 (b) the server returned 5xx to all RCPT commands in the first message so
5839 that the message was not completed; (c) the server dropped the connection
5840 or gave a negative response to the RSET that Exim sends to abort the
5841 transaction. The observed case was a dropped connection after DATA that had
5842 been sent in pipelining mode. That is, the server had advertised PIPELINING
5843 but was not implementing it correctly. The effect of the bug was incorrect
5844 behaviour, such as trying another host, and this could lead to a crash.
5850 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5851 and daemon.c were passed as pointers to ints; they should have been
5852 pointers to socklen_t variables (which are typically unsigned ints).
5854 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5857 3. Fixed a really odd bug that affected only the testing scheme; patching a
5858 certain fixed string in the binary changed the value of another string that
5859 happened to be identical to the end of the original first string.
5861 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5862 name", it returns that address as the IP address. On some operating
5863 systems (e.g. Solaris), it also passes back the IP address string as the
5864 "host name". However, on others (e.g. Linux), it passes back an empty
5865 string. Exim wasn't checking for this, and was changing the host name to an
5866 empty string, assuming it had been canonicalized.
5868 5. Although rare, it is permitted to have more than one PTR record for a given
5869 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5870 all the names associated with an address, because they do in Solaris.
5871 However, it seems that they do not in Linux for data that comes from the
5872 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5873 I found this out when I moved to a new Linux workstation and tried to run
5874 the Exim test suite.
5876 To get round this problem I have changed the code so that it now does its
5877 own call to the DNS to look up PTR records when searching for a host name.
5878 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5879 addresses that are only in /etc/hosts are still found.
5881 This behaviour is, however, controlled by an option called host_lookup_
5882 order, which defaults to "bydns:byaddr". If people want to use the other
5883 order, or indeed, just use one or the other means of lookup, they can
5884 specify it in this variable.
5886 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5887 some operating systems, this comes back from gethostbyaddr() as an empty
5888 string, and this is what Exim used to test for. However, it seems that in
5889 other systems, "." is yielded. Exim now tests for this case too.
5891 7. The values of check_spool_space and check_log_space are now held internally
5892 as a number of kilobytes instead of an absolute number of bytes. If a
5893 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5894 kilobyte. This means that much larger values can be stored.
5896 8. Exim monitor: an attempt to get the action menu when not actually pointing
5897 at a message produces an empty menu entitled "No message selected". This
5898 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5899 no entries in it ("Shell widget menu has zero width and/or height"). So I
5900 have added a single, blank menu entry in this case.
5902 9. Added ${quote_local_part.
5904 10. MIME decoding is now applied to the contents of Subject: header lines when
5907 11. Now that a reference to $sender_host_address automatically causes a reverse
5908 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5909 host lookup before query-style lookups in lists that might use this
5910 variable. This has therefore been abolished, and the "net-" prefix is no
5911 longer necessary for query-style lookups.
5913 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5914 have been a typo for LFLAGS, so it has been changed.
5916 13. The install script calls Exim with "-C /dev/null" in order to find the
5917 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5918 to be output. However, since Exim outputs its version number before the
5919 error, it didn't break the script. It just looked ugly. I fixed this by
5920 always allowing "-C /dev/null" if the caller is root.
5922 14. Ignore overlarge ACL variable number when reading spool file - insurance
5923 against a later release with more variables having written the file.
5925 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5926 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5927 this, as well as the form without the "IPv6" on the front.
5929 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5930 OS/Makefile-Darwin file.
5932 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5933 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5935 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5936 variable. However, some OS use ints for inodes. I've added cast to long int
5937 to get rid of the compiler warning.
5939 19. I had forgotten to lock out "/../" in configuration file names when
5940 ALT_CONFIG_PREFIX was set.
5942 20. Routers used for verification do not need to specify transports. However,
5943 if such a router generated a host list, and callout was configured, Exim
5944 crashed, because it could not find a port number from the (non-existent)
5945 transport. It now assumes port 25 in this circumstance.
5947 21. Added the -t option to exigrep.
5949 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5950 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5951 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5952 them is set, LOOKUP_LSEARCH is forced.
5954 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5956 24. Added sender and host information to the "rejected by local_scan()" log
5957 line; previously there was no indication of these.
5959 25. Added .include_if_exists.
5961 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5962 Linux. It turns out that not all file systems support this. Apparently some
5963 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5964 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5965 not supported on the file descriptor, is now ignored when Exim is trying to
5966 sync a directory. This applies only to Linux.
5968 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5970 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5971 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5974 29. Added support for maildirsize files from supplied patch (modified a bit).
5976 30. The use of :fail: followed by an empty string could lead Exim to respond to
5977 sender verification failures with (e.g.):
5979 550 Verification failed for <xxx>
5980 550 Sender verify failed
5982 where the first response line was missing the '-' that indicates it is not
5983 the final line of the response.
5985 31. The loop for finding the name of the user that called Exim had a hardwired
5986 limit of 10; it now uses the value of finduser_retries, which is used for
5987 all other user lookups.
5989 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5992 33. Exim was neglecting to zero errno before one call of strtol() when
5993 expanding a string and expecting an integer value. On some systems this
5994 resulted in spurious "integer overflow" errors. Also, it was casting the
5995 result into an int without checking.
5997 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5998 did not work. The code looks as if it has *never* worked, though it appears
5999 to have been documented since at least release 1.62. I have made it work.
6001 35. The "timeout_DNS" error in retry rules, also documented since at least
6002 1.62, also never worked. As it isn't clear exactly what this means, and
6003 clearly it isn't a major issue, I have abolished the feature by treating it
6004 as "timeout", and writing a warning to the main and panic logs.
6006 36. The display of retry rules for -brt wasn't always showing the error code
6009 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6010 timeout_connect_A, timeout_connect_MX.
6012 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6013 to the empty sender.
6015 39. The daemon was not analysing the content of -oX till after it had closed
6016 stderr and disconnected from the controlling terminal. This meant that any
6017 syntax errors were only noted on the panic log, and the return code from
6018 the command was 0. By re-arranging the code a little, I've made the
6019 decoding happen first, so such errors now appear on stderr, and the return
6020 code is 1. However, the actual setting up of the sockets still happens in
6021 the disconnected process, so errors there are still only recorded on the
6024 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6025 connections (as happens on some IP stacks) was logged at start up time as
6026 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6027 it from "IPv6 and IPv4", which means that two separate sockets are being
6030 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6031 says whether AF_INET or AF_INET6 was passed as an argument.
6033 42. Exiwhat output was messed up when time zones were included in log
6036 43. Exiwhat now gives more information about the daemon's listening ports,
6037 and whether -tls-on-connect was used.
6039 44. The "port" option of the smtp transport is now expanded.
6041 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6042 silently ignored. Now an error message is written to the main and panic
6045 46. There's a new ACL modifier called "logwrite" which writes to a log file
6046 as soon as it is encountered.
6048 47. Added $local_user_uid and $local_user_gid at routing time.
6050 48. Exim crashed when trying to verify a sender address that was being
6053 49. Exim was recognizing only a space character after ".include". It now also
6054 recognizes a tab character.
6056 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6057 extracting the relevant information from the specification. The man page no
6058 longer contains scrambled data for the -d option, and I've added a section
6059 at the front about calling Exim under different names.
6061 51. Added "extra_headers" argument to the "mail" command in filter files.
6063 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6066 53. Installed eximstats 1.29.
6068 54. Added transport_filter_timeout as a generic transport option.
6070 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6071 Cc: header lines. This was required by RFC 822, but it not required by RFC
6074 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6075 incoming messages that did not have them. Now it does so only if the
6076 message originates locally, that is, if there is no associated remote host
6077 address. When Resent- header lines are present, this applies to the Resent-
6078 lines rather than the non-Resent- lines.
6080 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6081 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6083 58. Messages for configuration errors now include the name of the main
6084 configuration file - useful now that there may be more than one file in a
6085 list (.included file names were always shown).
6087 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6088 for those rare installations that do not start the daemon as root or run it
6089 setuid root. I've cut out the call to initgroups() if the daemon is not
6092 60. The Exim user and group can now be bound into the binary as text strings
6093 that are looked up at the start of Exim's processing.
6095 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6097 62. Added $mailstore_basename variable.
6099 63. Installed patch to sieve.c from Michael Haardt.
6101 64. When Exim failed to open the panic log after failing to open the main log,
6102 the original message it was trying to log was written to stderr and debug
6103 output, but if they were not available (the usual case in production), it
6104 was lost. Now it is written to syslog before the two lines that record the
6105 failures to open the logs.
6107 65. Users' Exim filters run in subprocesses under the user's uid. It is
6108 possible for a "deliver" command or an alias in a "personal" command to
6109 provoke an address rewrite. If logging of address rewriting is configured,
6110 this fails because the process is not running as root or exim. There may be
6111 a better way of dealing with this, but for the moment (because 4.30 needs
6112 to be released), I have disabled address rewrite logging when running a
6113 filter in a non-root, non-exim process.
6119 1. The buildconfig auxiliary program wasn't quoting the value set for
6120 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6121 not defined. This bug was masked in 4.22 by the effect that was fixed in
6124 2. Some messages that were rejected after a message id was allocated were
6125 shown as "incomplete" by exigrep. It no longer does this for messages that
6126 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6128 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6129 have allow_domain_literals set, the ID did not get logged in the <= line.
6130 Domain literals are now always recognized in Message-ID: header lines.
6132 4. The first argument for a ${extract expansion item is the key name or field
6133 number. Leading and trailing spaces in this item were not being ignored,
6134 causing some misleading effects.
6136 5. When deliver_drop_privilege was set, single queue runner processes started
6137 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6138 same command in the process it spins off) were not dropping privilege.
6140 6. When the daemon running as "exim" started a queue runner, it always
6141 re-executed Exim in the spun-off process. This is a waste of effort when
6142 deliver_drop_privilege is set. The new process now just calls the
6143 queue-runner function directly.
6149 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6152 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6153 ignored. Though the use of -oP was forcing the writing of a pid file, it
6154 was always written to the default place.
6156 3. If the message "no IP address found for host xxxx" is generated during
6157 incoming verification, it is now followed by identification of the incoming
6158 connection (so you can more easily find what provoked it).
6160 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6162 5. Added some features to "harden" Exim a bit more against certain attacks:
6164 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6165 be put in Local/Makefile. This is like the never_users runtime option,
6166 but it cannot be overridden. The default setting is "root".
6168 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6169 prefix string with which any file named in a -C command line option
6172 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6173 is retained for -C and -D only if the caller of Exim is root. Without
6174 it, the exim user may also use -C and -D and retain privilege.
6176 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6177 command line option is disabled.
6179 6. Macro names set by the -D option must start with an upper case letter, just
6180 like macro names defined in the configuration file.
6182 7. Added "dereference=" facility to LDAP.
6184 8. Two instances of the typo "uknown" in the source files are fixed.
6186 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6187 the Configure-Makefile script screwed up while processing it.
6189 10. Incorporated PCRE 4.4.
6191 11. The SMTP synchronization check was not operating right at the start of an
6192 SMTP session. For example, it could not catch a HELO sent before the client
6193 waited for the greeting. There is now a check for outstanding input at the
6194 point when the greeting is written. Because of the duplex, asynchronous
6195 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6196 way, but not yet received, when the check is performed.
6198 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6199 on TCP/IP sockets, because this apparently causes some broken clients to
6202 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6203 unchanged) from the Cygwin maintainer.
6205 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6206 was supported instead of testing for mbx. Effectively a typo.
6208 15. The spa authenticator server code was not checking that the input it
6209 received was valid base64.
6211 16. The debug output line for the "set" modifier in ACLs was not showing the
6212 name of the variable that was being set.
6214 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6216 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6217 lookup on its own. Something else was needed to trigger the lookup. For
6218 example, a match in host_lookup or the need for a host name in a host list.
6219 Now, if $sender_host_name is referenced and the host name has not yet been
6220 looked up, a lookup is performed. If the lookup fails, the variable remains
6221 empty, and $host_lookup_failed is set to "1".
6223 19. Added "eqi" as a case-independent comparison operator.
6225 20. The saslauthd authentication condition could segfault if neither service
6226 nor realm was specified.
6228 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6229 error message that was logged was misleading, and incoming SMTP
6230 connections were dropped. The message is now more accurate, and temporary
6231 errors are given to SMTP connections.
6233 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6234 (except RSET) with a 421 error, until QUIT is received. However, it was
6235 failing to send a response to QUIT.
6237 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6238 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6239 ACL is now run after the helo_try_verify_hosts code.
6241 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6242 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6243 case-independent, so other case variants are also recognized). Apparently
6244 some systems use these upper case variants.
6246 25. If more than two messages were waiting for the same host, and a transport
6247 filter was specified for the transport, Exim sent two messages over the
6248 same TCP/IP connection, and then failed with "socket operation on non-
6249 socket" when it tried to send the third.
6251 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6253 27. The extern definition of crypt16() in expand.c was not being excluded when
6254 the OS had its own crypt16() function.
6256 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6257 as a preferred synonym for return_size_limit, both as an option and as an
6260 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6262 30. Changed the default configuration ACL to relax the local part checking rule
6263 for addresses that are not in any local domains. For these addresses,
6264 slashes and pipe symbols are allowed within local parts, but the sequence
6265 /../ is explicitly forbidden.
6267 31. SPA server authentication was not clearing the challenge buffer before
6270 32. log_message in a "warn" ACL statement was writing to the reject log as
6271 well as to the main log, which contradicts the documentation and doesn't
6272 seem right (because no rejection is happening). So I have stopped it.
6274 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6275 However, I am unable to do any testing of this.
6277 34. Fixed an infelicity in the appendfile transport. When checking directories
6278 for a mailbox, to see if any needed to be created, it was accidentally
6279 using path names with one or more superfluous leading slashes; tracing
6280 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6282 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6283 contents are added to the log line that is written for every discarded
6284 recipient. (Previously a log_message setting was ignored.)
6286 36. The ${quote: operator now quotes the string if it is empty.
6288 37. The install script runs exim in order to find its version number. If for
6289 some reason other than non-existence or emptiness, which it checks, it
6290 could not run './exim', it was installing it with an empty version number,
6291 i.e. as "exim-". This error state is now caught, and the installation is
6294 38. An argument was missing from the function that creates an error message
6295 when Exim fails to connect to the socket for saslauthd authentication.
6296 This could cause Exim to crash, or give a corrupted message.
6298 39. Added isip, isip4, and isip6 to ${if conditions.
6300 40. The ACL variables $acl_xx are now saved with the message, and can be
6301 accessed later in routers, transports, and filters.
6303 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6304 strings in the file are not string-expanded.
6306 42. If a MAIL command specified a SIZE value that was too large to fit into an
6307 int variable, the check against message_size_limit failed. Such values are
6308 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6309 day this will have to be increased, but I don't think I want to be around
6310 when emails are that large.
6317 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6318 iconv() is not standard in FreeBSD.
6320 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6321 IPv6 enabled. The observed symptom was a segmentation fault on return from
6322 the function os_common_find_running_interfaces() in src/os.c.
6324 3. In the check_special_case() function in daemon.c I had used "errno" as an
6325 argument name, which causes warnings on some systems. This was basically a
6326 typo, since it was named "eno" in the comments!
6328 4. The code that waits for the clock to tick (at a resolution of some fraction
6329 of a second) so as to ensure message-id uniqueness was always waiting for
6330 at least one whole tick, when it could have waited for less. [This is
6331 almost certainly not relevant at current processor speeds, where it is
6332 unlikely to ever wait at all. But we try to future-proof.]
6334 5. The function that sleeps for a time interval that includes fractions of a
6335 second contained a race. It did not block SIGALRM between setting the
6336 timer, and suspending (a couple of lines later). If the interval was short
6337 and the sigsuspend() was delayed until after it had expired, the suspension
6338 never ended. On busy systems this could lead to processes getting stuck for
6341 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6342 process, before it forks any delivery processes. The open lookup caching
6343 mechanism meant that the open file or database connection was passed into
6344 the delivery process. The problem was that delivery processes always tidy
6345 up cached lookup data. This could cause a problem for the next delivery
6346 process started by the queue runner, because the external queue runner
6347 process does not know about the closure. So the next delivery process
6348 still has data in the lookup cache. In the case of a file lookup, there was
6349 no problem because closing a file descriptor in a subprocess doesn't affect
6350 the parent. However, if the lookup was caching a connection to a database,
6351 the connection was closed, and the second delivery process was likely to
6352 see errors such as "PGSQL: query failed: server closed the connection
6353 unexpectedly". The problem has been fixed by closing all cached lookups
6354 in a queue runner before running a delivery process.
6356 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6357 seem to have the "const" qualifier which it has on other OS. I've
6360 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6361 *of the same type* (client or server) with the same public name that an
6362 error should be diagnosed.
6364 9. When Exim looked up a host name for an IP address, but failed to find the
6365 original IP address when looking up the host name (a safety check), it
6366 output the message "<ip address> does not match any IP for NULL", which was
6367 confusing, to say the least. The bug was that the host name should have
6368 appeared instead of "NULL".
6370 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6371 user that is built into the binary, and the -C or -D options is used, root
6372 privilege is dropped before the configuration file is read. In addition,
6373 logging is switched to stderr instead of the normal log files. If the
6374 configuration then re-defines the Exim user, the unprivileged environment
6375 is probably not what is expected, so Exim logs a panic warning message (but
6378 However, if deliver_drop_privilege is set, the unprivileged state may well
6379 be exactly what is intended, so the warning has been cut out in that case,
6380 and Exim is allowed to try to write to its normal log files.
6386 1. smtp_return_error_details was not giving details for temporary sender
6387 or receiver verification errors.
6389 2. Diagnose a configuration error if two authenticators have the same public
6392 3. Exim used not to create the message log file for a message until the first
6393 delivery attempt. This could be confusing when incoming messages were held
6394 for policy or load reasons. The message log file is now created at the time
6395 the message is received, and an initial "Received" line is written to it.
6397 4. The automatically generated man page for command line options had a minor
6398 bug that caused no ill effects; however, a more serious problem was that
6399 the procedure for building the man page automatically didn't always
6400 operate. Consequently, release 4.20 contains an out-of-date version. This
6401 shouldn't happen again.
6403 5. When building Exim with embedded Perl support, the script that builds the
6404 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6405 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6407 6. The freeze_tell option was not being used for messages that were frozen on
6408 arrival, either by an ACL or by local_scan().
6410 7. Added the smtp_incomplete_transaction log selector.
6412 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6413 was accepting AUTH without a new EHLO.
6415 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6416 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6419 10. Logging of TCP/IP connections (when configured) now happens in the main
6420 daemon process instead of the child process, so that the TCP/IP connection
6421 count is more accurate (but it can never be perfect).
6423 11. The use of "drop" in a nested ACL was not being handled correctly in the
6424 outer ACL. Now, if condition failure induced by the nested "drop" causes
6425 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6426 or "require"), the connection is dropped.
6428 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6429 that yield "discard" can now be used with an "accept" or a "discard" verb,
6430 but an error is generated for any others (because I can't see a useful way
6431 to define what should happen).
6433 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6434 are now processed in the same way as lines in the Exim configuration file.
6435 In particular, continuation lines are supported.
6437 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6439 15. Added -ti meaning -t -i.
6441 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6442 domains, and warn by logging if others are found.
6444 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6445 returned from GIFCONF when Exim is trying to find the list of interfaces on
6446 a host. The code in os.c has been modified to copy each ifreq to an aligned
6447 structure in all cases.
6449 Also, in some cases, the returned ifreq's were being copied to a 'struct
6450 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6451 means the last couple of bytes of an IPv6 address could be chopped if the
6452 ifreq contained only a normal sockaddr (14 bytes storage).
6454 18. Named domain lists were not supported in the hosts_treat_as_local option.
6455 An entry such as +xxxx was not recognized, and was treated as a literal
6458 19. Ensure that header lines added by a DATA ACL are included in the reject log
6459 if the ACL subsequently rejects the message.
6461 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6462 MD5 (which is deprecated).
6464 21. When testing a filter file using -bf, Exim was writing a message when it
6465 took the sender from a "From " line in the message, but it was not doing so
6466 when it took $return_path from a Return-Path: header line. It now does.
6468 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6469 with a valid header line field name (a series of printing characters
6470 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6472 23. Changed "disc" in the source to "disk" to conform to the documentation and
6473 the book and for uniformity.
6475 24. Ignore Sendmail's -Ooption=value command line item.
6477 25. When execve() failed while trying to run a command in a pipe transport,
6478 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6479 could be confused with a return value of 69 from the command itself. This
6480 has been changed to 127, the value the shell returns if it is asked to run
6481 a non-existent command. The wording for the related log line suggests a
6482 non-existent command as the problem.
6484 26. If received_header_text expands to an empty string, do not add a Received:
6485 header line to the message. (Well, it adds a token one on the spool, but
6486 marks it "old" so that it doesn't get used or transmitted.)
6488 27. Installed eximstats 1.28 (addition of -nt option).
6490 28. There was no check for failure on the call to getsockname() in the daemon
6491 code. This can fail if there is a shortage of resources on the system, with
6492 ENOMEM, for example. A temporary error is now given on failure.
6494 29. Contrary to the C standard, it seems that in some environments, the
6495 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6496 program. Exim now does this explicitly; it affects the formatting of
6497 timestamps using strftime().
6499 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6500 complaints. I've now initialized all the variables, to avoid this.
6502 32. Header lines added by a system filter were not being "seen" during
6503 transport-time rewrites.
6505 33. The info_callback() function passed to OpenSSL is set up with type void
6506 (*)(SSL *, int, int), as described somewhere. However, when calling the
6507 function (actually a macro) that sets it up, the type void(*)() is
6508 expected. I've put in a cast to prevent warnings from picky compilers.
6510 34. If a DNS black list lookup found a CNAME record, but there were no A
6511 records associated with the domain it pointed at, Exim crashed.
6513 35. If a DNS black list lookup returned more than one A record, Exim ignored
6514 all but the first. It now scans all returned addresses if a particular IP
6515 value is being sought. In this situation, the contents of the
6516 $dnslist_value variable are a list of all the addresses, separated by a
6519 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6520 to accept a host name and all its aliases if the forward lookup for any of
6521 them yielded the IP address of the incoming connection. Now it accepts only
6522 those names whose forward lookup yields the correct IP address. Any other
6523 names are discarded. This closes a loophole whereby a rogue DNS
6524 administrator could create reverse DNS records to break through a
6525 wildcarded host restriction in an ACL.
6527 37. If a user filter or a system filter that ran in a subprocess used any of
6528 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6529 the wrong values were passed to the pipe command ($thisaddress had the
6530 value of $0, $0 had the value of $1, etc). This bug was introduced by
6531 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6533 38. Improved the line breaking for long SMTP error messages from ACLs.
6534 Previously, if there was no break point between 40 and 75 characters, Exim
6535 left the rest of the message alone. Two changes have been made: (a) I've
6536 reduced the minimum length to 35 characters; (b) if it can't find a break
6537 point between 35 and 75 characters, it looks ahead and uses the first one
6538 that it finds. This may give the occasional overlong line, but at least the
6539 remaining text gets split now.
6541 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6542 file descriptors might be low, and that setting 1000 would always raise it.
6543 It turns out that in some environments, the limit is already over 1000 and
6544 that lowering it causes trouble. So now Exim takes care not to decrease it.
6546 40. When delivering a message, the value of $return_path is set to $sender_
6547 address at the start of routing (routers may change the value). By an
6548 oversight, this default was not being set up when an address was tested by
6549 -bt or -bv, which affected the outcome if any router or filter referred to
6552 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6553 log only when "message" or "log_message" are set. However, if one of the
6554 conditions was an address verification, or a call to a nested ACL, the
6555 messages generated by the underlying test were being passed through. This
6556 no longer happens. The underlying message is available in $acl_verify_
6557 message for both "message" and "log_message" expansions, so it can be
6558 passed through if needed.
6560 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6561 new expansion $bh_ to give the encoded byte string without charset
6562 translation. Translation happens only if iconv() is available; HAVE_ICONV
6563 indicates this at build time. HEADERS_CHARSET gives the charset to
6564 translate to; headers_charset can change it in the configuration, and
6565 "headers charset" can change it in an individual filter file.
6567 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6568 that creates RFC 2047 encoded "words" labels them as that charset instead
6569 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6570 expansion operator; (ii) when Exim creates a From: line for a local
6571 message; (iii) when a header line is rewritten to include a "phrase" part.
6573 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6574 buggy, causing it to skip the first lines of messages whose message ID
6575 ended in 'D'. This would not have bitten before Exim release 4.14, because
6576 message IDs were unlikely to end in 'D' before then. The effect was to have
6577 incorrect size information for certain domains.
6579 45. #include "config.h" was missing at the start of the crypt16.c module. This
6580 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6583 46. If there was a timeout during a "random" callout check, Exim treated it as
6584 a failure of the random address, and carried on sending RSET and the real
6585 address. If the delay was just some slowness somewhere, the response to the
6586 original RCPT would be taken as a response to RSET and so on, causing
6587 mayhem of various kinds.
6589 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6590 when I implemented it. It didn't allow for the fact that some option values
6591 may legitimately be negative (e.g. size_addition), and it didn't even do
6592 the right test for positive values.
6594 48. Domain names in DNS records are case-independent. Exim always looks them up
6595 in lower case. Some resolvers return domain names in exactly the case they
6596 appear in the zone file, that is, they may contain uppercase letters. Not
6597 all resolvers do this - some return always lower case. Exim was treating a
6598 change of case by a resolver as a change of domain, similar to a widening
6599 of a domain abbreviation. This triggered its re-routing code and so it was
6600 trying to route what was effectively the same domain again. This normally
6601 caused routing to fail (because the router wouldn't handle the domain
6602 twice). Now Exim checks for this case specially, and just changes the
6603 casing of the domain that it ultimately uses when it transmits the message
6606 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6609 50. If a filter generated a file delivery with a non-absolute name (possible if
6610 no home directory exists for the router), the forbid_file option was not
6613 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6614 the existing equality matching.
6616 52. Exim was using ints instead of ino_t variables in some places where it was
6617 dealing with inode numbers.
6619 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6620 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6621 called TMPDIR, and if it finds it is different, it changes its value.
6623 54. The smtp_printf() function is now made available to local_scan() so
6624 additional output lines can be written before returning. There is also an
6625 smtp_fflush() function to enable the detection of a dropped connection.
6626 The variables smtp_input and smtp_batched_input are exported to
6629 55. Changed the default runtime configuration: the message "Unknown user"
6630 has been removed from the ACL, and instead placed on the localuser router,
6631 using the cannot_route_message feature. This means that any verification
6632 failures that generate their own messages won't get overridden. Similarly,
6633 the "Unrouteable address" message that was in the ACL for unverifiable
6634 relay addresses has also been removed.
6636 56. Added hosts_avoid_esmtp to the smtp transport.
6638 57. The exicyclog script was not checking for the esoteric option
6639 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6640 will work only if exicyclog is run under the appropriate euid.
6642 58. Following a discussion on the list, the rules by which Exim recognises line
6643 endings on incoming messages have been changed. The -dropcr and drop_cr
6644 options are now no-ops, retained only for backwards compatibility. The
6645 following line terminators are recognized: LF CRLF CR. However, special
6646 processing applies to CR:
6648 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6649 nor a local message in the state where . is a terminator.
6651 (ii) If a bare CR is encountered in a header line, an extra space is added
6652 after the line terminator so as not to end the header. The reasoning
6653 behind this is that bare CRs in header lines are most likely either
6654 to be mistakes, or people trying to play silly games.
6656 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6657 was being incorrectly given as 18 bytes larger than it should have been.
6658 This is a VOB (very old bug).
6660 60. This may never have affected anything current, but just in case it has:
6661 When the local host is found other than at the start of a list of hosts,
6662 the local host, those with the same MX, and any that follow, are discarded.
6663 When the list in question was part of a longer list of hosts, the following
6664 hosts (not currently being processed) were also being discarded. This no
6665 longer happens. I'm not sure if this situation could ever has previously
6668 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6671 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6672 header. This is something that is recommended in a new Internet Draft, and
6673 is something that is documented as being done by Sendmail. There are two
6674 possible values. For messages generated by the autoreply transport, Exim
6677 Auto-Submitted: auto-replied
6679 whereas for all other generated messages (e.g. bounces) it adds
6681 Auto-Submitted: auto-generated
6683 63. The "personal" condition in filters now includes a test for the
6684 Auto-Submitted: header. If it contains the string "auto-" the message it
6685 not considered personal.
6687 64. Added rcpt_include_affixes as a generic transport option.
6689 65. Added queue_only_override (default true).
6691 66. Added the syslog_duplication option.
6693 67. If what should have been the first header line of a message consisted of
6694 a space followed by a colon, Exim was mis-interpreting it as a header line.
6695 It isn't of course - it is syntactically invalid and should therefore be
6696 treated as the start of the message body. The misbehaviour could have
6697 caused a number of strange effects, including loss of data in subsequent
6698 header lines, and spool format errors.
6700 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6701 client host had authenticated. This control can now be exercised by an ACL
6702 for more flexibility.
6704 69. By default, callouts do not happen when testing with -bh. There is now a
6705 variant, -bhc, which does actually run the callout code, including
6706 consulting and updating the callout cache.
6708 70. Added support for saslauthd authentication, courtesy of Alexander
6711 71. If statvfs() failed on the spool or log directories while checking their
6712 size for availability, Exim confusingly gave the error "space shortage".
6713 Furthermore, in debugging mode it crashed with a floating point exception.
6714 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6715 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6716 serious problem, Exim now writes to the main and panic logs when this
6717 happens, with details of the failure. It then refuses to accept the
6718 incoming message, giving the message "spool directory problem" or "log
6719 directory problem" with a 421 code for SMTP messages.
6721 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6722 0, 1, and 2 exist, because some OS complain for execs without them (see
6723 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6724 descriptors. However, the code omitted to check that the open succeeded,
6725 causing mysterious errors if for some reason the permissions on /dev/null
6726 got screwed. Now Exim writes a message to the main and panic logs, and
6727 bombs out if it can't open /dev/null.
6729 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6730 interact so that it is all more flexible. It is supposed to remain
6731 backwards compatible. Also added extra_local_interfaces.
6733 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6734 to bomb out with an assertion failure - to the client this appears as a
6735 connection drop. This problem occurs in the part of the code that was taken
6736 from the Samba project. Fortunately, the assertion is in a very simple
6737 function, so I have fixed this by reproducing the function inline in the
6738 one place where it is called, and arranging for authentication to fail
6739 instead of killing the process with assert().
6741 75. The SPA client code was not working when the server requested OEM rather
6742 than Unicode encoding.
6744 76. Added code to make require_files with a specific uid setting more usable in
6745 the case where statting the file as root fails - usually a non-root-mounted
6746 NFS file system. When this happens and the failure is EACCES, Exim now
6747 forks a subprocess and does the per-uid checking as the relevant uid.
6749 77. Added process_log_path.
6751 78. If log_file_path was not explicitly set, a setting of check_log_space or
6752 check_log_inodes was ignored.
6754 79. If a space check for the spool or log partitions fails, the incident is now
6755 logged. Of course, in the latter case the data may get lost...
6757 80. Added the %p formatting code to string_format() so that it can be used to
6758 print addresses in debug_print(). Adjusted all the address printing in the
6759 debugging in store.c to use %p rather than %d.
6761 81. There was a concern that a line of code in smtp_in.c could overflow a
6762 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6763 initially expressed, the concern was not well-founded, because trailing
6764 spaces are removed early. However, if the trailing spaces were followed by
6765 a NULL, they did not get removed, so the overflow was possible. Two fixes
6768 (a) I re-wrote the offending code in a cleaner fashion.
6769 (b) If an incoming SMTP command contains a NULL character, it is rejected
6772 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6773 runs initgroups(), so that if the Exim user is in any additional groups,
6774 they will be used during message reception.
6780 The change log for 4.20 and earlier releases has been archived.