1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Rework error string handling in TLS interface so that the caller in
12 more cases is responsible for logging. This permits library-sourced
13 string to be attached to addresses during delivery, and collapses
14 pairs of long lines into single ones.
16 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
17 during configuration. Wildcards are allowed and expanded.
19 JH/02 Rework error string handling in DKIM to pass more info back to callers.
20 This permits better logging.
22 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
23 do not close it down and have the child transport start it up again on
24 the passed-on TCP connection. Instead, proxy the child (and any
25 subsequent ones) for TLS via a unix-domain socket channel. Logging is
26 affected: the continued delivery log lines do not have any DNSSEC, TLS
27 Certificate or OCSP information. TLS cipher information is still logged.
29 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
30 identical IP addresses on different listening ports. Will also affect
33 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
34 add noisy ifdef guards to special-case this sillyness.
35 Patch from Bernd Kuhls.
37 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
38 than 255 are no longer allowed.
40 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
41 Disable the session-cache too, which might reduce our load. Since we
42 currrectly use a new context for every connection, both as server and
43 client, there is no benefit for these.
44 GnuTLS appears to not support tickets server-side by default (we don't
45 call gnutls_session_ticket_enable_server()) but client side is enabled
46 by default on recent versions (3.1.3 +) unless the PFS priority string
49 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
50 <https://reproducible-builds.org/specs/source-date-epoch/>.
52 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
53 the check for any unsuccessful recipients did not notice the limit, and
54 erroneously found still-pending ones.
56 JH/08 Pipeline CHUNKING command and data together, on kernels that support
57 MSG_MORE. Only in-clear (not on TLS connections).
59 JH/09 Avoid using a temporary file during transport using dkim. Unless a
60 transport-filter is involved we can buffer the headers in memory for
61 creating the signature, and read the spool data file once for the
62 signature and again for transmission.
64 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
65 4.77 as the kernel support then wasn't solid, having issues in 64bit
66 mode. Now, it's been long enough.
72 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
73 than -2003 did; needs libidn2 in addition to libidn.
75 JH/02 The path option on a pipe transport is now expanded before use.
77 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
78 Patch provided by "Björn", documentation fix added too.
80 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
81 missing a wire-to-host endian conversion.
83 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
84 close after a BDAT command line could be taken as a following command,
85 giving a synch failure. Fix by only checking for synch immediately
86 before acknowledging the chunk.
88 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
89 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
90 macro. Patches provided by Josh Soref.
92 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
93 Previously we did not; the RFC seems ambiguous and VRFY is not listed
94 by IANA as a service extension. However, John Klensin suggests that we
97 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
98 the dkim code may be unix-mode line endings rather than smtp wire-format
99 CRLF, so prepend a CR to any bare LF.
101 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
102 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
104 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
105 the first were themselves being wrongly included in the feed into dkim
106 processing; with most chunk sizes in use this resulted in an incorrect
107 body hash calculated value.
109 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
110 DKIM signature block, for verification. Although advised against by
111 standards it is specifically not ruled illegal.
113 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
115 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
116 missing a body hash (the bh= tag).
118 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
119 It seems that HAProxy sends the Proxy Protocol information in clear and
120 only then does a TLS startup, so do the same.
122 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
123 TCP connections (such as for Spamd) unless the daemon successfully set
124 Fast Open mode on its listening sockets. This fixes breakage seen on
125 too-old kernels or those not configured for Fast Open, at the cost of
126 requiring both directions being enabled for TFO, and TFO never being used
127 by non-daemon-related Exim processes.
129 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
130 endings, at least on the first header line. Try to canonify any that get
131 past that check, despite the cost.
133 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
134 now limited to an arbitrary five deep, while parsing addresses with the
135 strip_excess_angle_brackets option enabled.
137 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
138 instead leave the unprompted TLS handshake in socket buffer for the
139 TLS library to consume.
141 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
143 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
145 JH/16 Drop variables when they go out of scope. Memory management drops a whole
146 region in one operation, for speed, and this leaves assigned pointers
147 dangling. Add checks run only under the testsuite which checks all
148 variables at a store-reset and panics on a dangling pointer; add code
149 explicitly nulling out all the variables discovered. Fixes one known
150 bug: a transport crash, where a dangling pointer for $sending_ip_address
151 originally assigned in a verify callout, is re-used.
153 PP/06 Drop '.' from @INC in various Perl scripts.
155 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
157 PP/08 Reduce a number of compilation warnings under clang; building with
158 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
159 should be warning-free.
161 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
163 HS/01 Fix portability problems introduced by PP/08 for platforms where
164 realloc(NULL) is not equivalent to malloc() [SunOS et al].
166 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
167 chunk. This allows us to accept broken chunked messages. We need a more
168 general solution here.
170 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
171 already-broken messages in the queue.
173 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
175 JH/19 Fix reference counting bug in routing-generated-address tracking.
181 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
182 supports it and a size is available (ie. the sending peer gave us one).
184 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
185 years of being deprecated). The replacements are the ACLs
186 acl_smtp_mime and acl_not_smtp_mime.
188 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
189 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
190 or even an in-clear connection were permitted. Now, if the host lookup
191 was dnssec and dane was requested then the host is only used if the
192 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
193 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
194 if one fails this test.
195 This means that a poorly-configured remote DNS will make it incommunicado;
196 but it protects against a DNS-interception attack on it.
198 JH/04 Bug 1810: make continued-use of an open smtp transport connection
199 non-noisy when a race steals the message being considered.
201 JH/05 If main configuration option tls_certificate is unset, generate a
202 self-signed certificate for inbound TLS connections.
204 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
205 in rewrites and routers.
207 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
208 and logged a warning sing 4.83; now they are a configuration file error.
210 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
211 (lacking @domain). Apply the same qualification processing as RCPT.
213 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
215 JH/10 Support ${sha256:} applied to a string (as well as the previous
218 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
219 a cutthrough deliver is pending, as we always want to make a connection.
220 This also avoids re-routing the message when later placing the cutthrough
221 connection after a verify cache hit.
222 Do not update it with the verify result either.
224 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
225 when routing results in more than one destination address.
227 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
228 signing (which inhibits the cutthrough capability). Previously only
229 the presence of an option was tested; now an expansion evaluating as
230 empty is permissible (obviously it should depend only on data available
231 when the cutthrough connection is made).
233 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
234 the relevant preceding SMTP command did not note the pipelining mode.
236 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
237 Previously they were not counted.
239 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
240 as one having no matching records. Previously we deferred the message
241 that needed the lookup.
243 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
244 distinguished as "(=".
246 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
247 for missing MX records. Previously it only worked for missing A records.
249 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
251 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
252 after the data-go-ahead and data-ack. Patch from Jason Betts.
254 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
255 even for a "none" policy. Patch from Tony Meyer.
257 JH/22 Fix continued use of a connection for further deliveries. If a port was
258 specified by a router, it must also match for the delivery to be
261 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
262 When one of the recipients of a message was unsuitable for the connection
263 (has no matching addresses), we lost track of needing to mark it
264 deferred. As a result mail would be lost.
266 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
268 JH/25 Decoding ACL controls is now done using a binary search; the source code
269 takes up less space and should be simpler to maintain. Merge the ACL
270 condition decode tables also, with similar effect.
272 JH/26 Fix problem with one_time used on a redirect router which returned the
273 parent address unchanged. A retry would see the parent address marked as
274 delivered, so not attempt the (identical) child. As a result mail would
277 JH/27 Fix a possible security hole, wherein a process operating with the Exim
278 UID can gain a root shell. Credit to http://www.halfdog.net/ for
279 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
282 JH/28 Enable {spool,log} filesystem space and inode checks as default.
283 Main config options check_{log,spool}_{inodes,space} are now
284 100 inodes, 10MB unless set otherwise in the configuration.
286 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
287 Previously it only applied to the main-section connection policy
290 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
292 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
293 by me. Added RFC7919 DH primes as an alternative.
295 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
296 are not in the system include path.
298 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
299 GnuTLS, when a session startup failed (eg because the client disconnected)
300 Exim did stdio operations after fclose. This was exposed by a recent
301 change which nulled out the file handle after the fclose.
303 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
304 signed directly by the cert-signing cert, rather than an intermediate
305 OCSP-signing cert. This is the model used by LetsEncrypt.
307 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
309 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
310 an incoming connection.
312 HS/02 Bug 1802: Do not half-close the connection after sending a request
315 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
316 fallback to "prime256v1".
318 JH/34 SECURITY: Use proper copy of DATA command in error message.
319 Could leak key material. Remotely exploitable. CVE-2016-9963.
325 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
326 and 3.4.4 - once the server is enabled to respond to an OCSP request
327 it does even when not requested, resulting in a stapling non-aware
328 client dropping the TLS connection.
330 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
331 support variable-length bit vectors. No functional change.
333 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
334 The I= interface field on outgoing lines is now after the H= remote
335 host field, same as incoming lines. There is a separate
336 outgoing_interface log selector which allows you to disable the
339 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
340 If not running log_selector +smtp_connection the mainlog would be held
341 open indefinitely after a "too many connections" event, including to a
342 deleted file after a log rotate. Leave the per net connection logging
343 leaving it open for efficiency as that will be quickly detected by the
344 check on the next write.
346 HS/01 Bug 1671: Fix post transport crash.
347 Processing the wait-<transport> messages could crash the delivery
348 process if the message IDs didn't exist for some reason. When
349 using 'split_spool_directory=yes' the construction of the spool
350 file name failed already, exposing the same netto behaviour.
352 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
353 mime_regex ACL conditions.
355 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
356 to DSN fail messages (bounces): remote IP, remote greeting, remote response
357 to HELO, local diagnostic string.
359 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
360 log line to debug. Even when configured with a tls authenticator many
361 client connections are expected to not authenticate in this way, so
362 an authenticate fail is not an error.
364 HS/02 Add the Exim version string to the process info. This way exiwhat
365 gives some more detail about the running daemon.
367 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
368 matter for fast-change records such as DNSBLs.
370 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
371 retry record, even if constant. There may be multiple transports with
372 different interface settings and the retry behaviour needs to be kept
375 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
377 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
379 JH/10 Bug 840: fix log_defer_output option of pipe transport
381 JH/11 Bug 830: use same host for all RCPTS of a message, even under
382 hosts_randomize. This matters a lot when combined with mua_wrapper.
384 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
385 ${quote_pgsql:<string>} operator.
387 JH/13 Bug 1708: avoid misaligned access in cached lookup.
389 JH/14 Change header file name for freeradius-client. Relevant if compiling
390 with Radius support; from the Gentoo tree and checked under Fedora.
392 JH/15 Bug 1712: Introduce $prdr_requested flag variable
394 JH/16 Bug 1714: Permit an empty string as expansion result for transport
395 option transport_filter, meaning no filtering.
397 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
399 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
400 defaults to "*" (all hosts). The variable is now available when not built
401 with TLS, default unset, mainly to enable keeping the testsuite sane.
402 If a server certificate is not supplied (via tls_certificate) an error is
403 logged, and clients will find TLS connections fail on startup. Presumably
404 they will retry in-clear.
405 Packagers of Exim are strongly encouraged to create a server certificate
406 at installation time.
408 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
409 with the $config_file variable.
411 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
412 in transport context, after the attempt, and per-recipient. The latter type
413 is per host attempted. The event data is the error message, and the errno
414 information encodes the lookup type (A vs. MX) used for the (first) host,
415 and the trailing two digits of the smtp 4xx response.
417 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
418 to write to mainlog (or rejectlog, paniclog) in the window between file
419 creation and permissions/ownership being changed. Particularly affects
420 installations where exicyclog is run as root, rather than exim user;
421 result is that the running daemon panics and dies.
423 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
425 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
426 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
427 "pri" and "weight". Note that the previous implicit priority given by the
428 list order is no longer honoured.
430 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
433 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
434 by defining SUPPORT_SOCKS.
436 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
437 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
438 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
439 variables are renamed to proxy_{local,external}_{address,port}.
441 JH/27 Move Internationalisation support from Experimental to mainline, enabled
442 for a build by defining SUPPORT_I18N
444 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
445 of the query string, and make ${quote_redis:} do that quoting.
447 JH/29 Move Events support from Experimental to mainline, enabled by default
448 and removable for a build by defining DISABLE_EVENT.
450 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
452 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
453 cached by the daemon.
455 JH/32 Move Redis support from Experimental to mainline, enabled for a build
456 by defining LOOKUP_REDIS. The libhiredis library is required.
458 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
459 keys are given for lookup.
461 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
462 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
463 only supported when built with TLS support. The PolarSSL SHA routines
464 are still used when the TLS library is too old for convenient support.
466 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
467 openssl_options), for security. OpenSSL forces this from version 1.1.0
468 server-side so match that on older versions.
470 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
471 allocation for $value could be released as the expansion processing
472 concluded, but leaving the global pointer active for it.
474 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
475 and to use the domains and local_parts ACL conditions.
477 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
478 incorrectly not doubled on cutthrough transmission, hence seen as a
479 body-termination at the receiving system - resulting in truncated mails.
480 Commonly the sender saw a TCP-level error, and retransmitted the message
481 via the normal store-and-forward channel. This could result in duplicates
482 received - but deduplicating mailstores were liable to retain only the
483 initial truncated version.
485 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
487 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
489 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
490 we're in there, support oversigning also; bug 1309.
492 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
494 HS/04 Add support for keep_environment and add_environment options.
496 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
497 either intentional arithmetic overflow during PRNG, or testing config-
500 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
501 delivery resulted in actual delivery. Cancel cutthrough before DATA
504 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
505 rejects a recipient: pass the reject to the originator.
507 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
508 Many were false-positives and ignorable, but it's worth fixing the
511 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
512 for the new environment-manipulation done at startup. Move the routines
513 from being local to tls.c to being global via the os.c file.
515 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
516 an extract embedded as result-arg for a map, the first arg for extract
517 is unavailable so we cannot tell if this is a numbered or keyed
518 extraction. Accept either.
524 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
527 JH/02 The smtp transport option "multi_domain" is now expanded.
529 JH/03 The smtp transport now requests PRDR by default, if the server offers
532 JH/04 Certificate name checking on server certificates, when exim is a client,
533 is now done by default. The transport option tls_verify_cert_hostnames
534 can be used to disable this per-host. The build option
535 EXPERIMENTAL_CERTNAMES is withdrawn.
537 JH/05 The value of the tls_verify_certificates smtp transport and main options
538 default to the word "system" to access the system default CA bundle.
539 For GnuTLS, only version 3.0.20 or later.
541 JH/06 Verification of the server certificate for a TLS connection is now tried
542 (but not required) by default. The verification status is now logged by
543 default, for both outbound TLS and client-certificate supplying inbound
546 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
549 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
550 Status Notification (bounce) messages are now MIME format per RFC 3464.
551 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
552 under the control of the dsn_advertise_hosts option, and routers may
553 have a dsn_lasthop option.
555 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
556 default, modifiable by a malware= option. The list separator for
557 the options can now be changed in the usual way. Bug 68.
559 JH/10 The smtp_receive_timeout main option is now expanded before use.
561 JH/11 The incoming_interface log option now also enables logging of the
562 local interface on delivery outgoing connections.
564 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
565 if the interface and destination host and port all match.
567 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
570 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
571 Patch from Andrew Lewis.
573 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
574 now supports optional time-restrictions, weighting, and priority
575 modifiers per server. Patch originally by <rommer@active.by>.
577 JH/16 The spamd_address main option now supports a mixed list of local
578 and remote servers. Remote servers can be IPv6 addresses, and
579 specify a port-range.
581 JH/17 Bug 68: The spamd_address main option now supports an optional
582 timeout value per server.
584 JH/18 Bug 1581: Router and transport options headers_add/remove can
585 now have the list separator specified.
587 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
590 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
593 JH/21 Support for the A6 type of dns record is withdrawn.
595 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
596 rather than the verbs used.
598 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
599 from 255 to 1024 chars.
601 JH/24 Verification callouts now attempt to use TLS by default.
603 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
604 are generic router options now. The defaults didn't change.
606 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
607 Original patch from Alexander Shikoff, worked over by JH.
609 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
610 files if ZCAT_COMMAND is not executable.
612 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
614 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
616 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
617 Normally benign, it bites when the pair was led to by a CNAME;
618 modern usage is to not canonicalize the domain to a CNAME target
619 (and we were inconsistent anyway for A-only vs AAAA+A).
621 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
623 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
624 when evaluating $sender_host_dnssec.
626 JH/31 Check the HELO verification lookup for DNSSEC, adding new
627 $sender_helo_dnssec variable.
629 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
631 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
633 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
635 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
636 documented as working, but never had. Support all but $spam_report.
638 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
639 added for tls authenticator.
641 HS/03 Add perl_taintmode main config option
647 TL/01 When running the test suite, the README says that variables such as
648 no_msglog_check are global and can be placed anywhere in a specific
649 test's script, however it was observed that placement needed to be near
650 the beginning for it to behave that way. Changed the runtest perl
651 script to read through the entire script once to detect and set these
652 variables, reset to the beginning of the script, and then run through
653 the script parsing/test process like normal.
655 TL/02 The BSD's have an arc4random API. One of the functions to induce
656 adding randomness was arc4random_stir(), but it has been removed in
657 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
658 function when detected.
660 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
661 cause callback expansion.
663 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
664 syntax errors in an expansion can be treated as a string instead of
665 logging or causing an error, due to the internal use of bool_lax
666 instead of bool when processing it.
668 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
669 server certificates when making smtp deliveries.
671 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
673 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
675 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
677 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
678 Merged patch from Sebastian Wiedenroth.
680 JH/05 Fix results-pipe from transport process. Several recipients, combined
681 with certificate use, exposed issues where response data items split
682 over buffer boundaries were not parsed properly. This eventually
683 resulted in duplicates being sent. This issue only became common enough
684 to notice due to the introduction of connection certificate information,
685 the item size being so much larger. Found and fixed by Wolfgang Breyha.
687 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
688 size buffer was used, resulting in syntax errors when an expansion
691 JH/07 Add support for directories of certificates when compiled with a GnuTLS
692 version 3.3.6 or later.
694 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
695 is EXPERIMENTAL_EVENT, the main-configuration and transport options
696 both become "event_action", the variables become $event_name, $event_data
697 and $event_defer_errno. There is a new variable $verify_mode, usable in
698 routers, transports and related events. The tls:cert event is now also
699 raised for inbound connections, if the main configuration event_action
702 TL/06 In test suite, disable OCSP for old versions of openssl which contained
703 early OCSP support, but no stapling (appears to be less than 1.0.0).
705 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
706 server certificate names available under the smtp transport option
707 "tls_verify_cert_hostname" now do not permit multi-component wildcard
710 JH/10 Time-related extraction expansions from certificates now use the main
711 option "timezone" setting for output formatting, and are consistent
712 between OpenSSL and GnuTLS compilations. Bug 1541.
714 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
715 encoded parameter in the incoming message. Bug 1558.
717 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
718 include certificate info, eximon was claiming there were spoolfile
721 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
723 JH/14 Log delivery-related information more consistently, using the sequence
724 "H=<name> [<ip>]" wherever possible.
726 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
727 are problematic for Debian distribution, omit them from the release
730 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
732 JH/16 Fix string representation of time values on 64bit time_t architectures.
735 JH/17 Fix a null-indirection in certextract expansions when a nondefault
736 output list separator was used.
741 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
742 checkers that were complaining about end of non-void function with no
745 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
746 This was a regression introduced in 4.83 by another bugfix.
748 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
750 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
751 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
757 TF/01 Correctly close the server side of TLS when forking for delivery.
759 When a message was received over SMTP with TLS, Exim failed to clear up
760 the incoming connection properly after forking off the child process to
761 deliver the message. In some situations the subsequent outgoing
762 delivery connection happened to have the same fd number as the incoming
763 connection previously had. Exim would try to use TLS and fail, logging
764 a "Bad file descriptor" error.
766 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
767 utilities have not been installed.
769 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
770 temporary space as the ACL may create new global variables.
772 TL/01 LDAP support uses per connection or global context settings, depending
773 upon the detected version of the libraries at build time.
775 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
776 to extract and use the src ip:port in logging and expansions as if it
777 were a direct connection from the outside internet. PPv2 support was
778 updated based on HAProxy spec change in May 2014.
780 JH/02 Add ${listextract {number}{list}{success}{fail}}.
782 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
783 Properly escape header and check for NULL return.
785 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
788 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
790 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
791 characters in header names, implemented as a verify condition.
792 Contributed by Michael Fischer v. Mollard.
794 TL/05 Rename SPF condition results err_perm and err_temp to standardized
795 results permerror and temperror. Previous values are deprecated but
796 still accepted. In a future release, err_perm and err_temp will be
797 completely removed, which will be a backward incompatibility if the
798 ACL tests for either of these two old results. Patch contributed by
799 user bes-internal on the mailing list.
801 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
803 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
804 selectors, in both main and reject logs.
806 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
809 JH/07 Add malware type "sock" for talking to simple daemon.
811 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
813 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
814 routers/transports under cutthrough routing.
816 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
817 numbers. Touch up "bool" conditional to keep the same definition.
819 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
821 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
823 JH/12 Expand items in router/transport headers_add or headers_remove lists
824 individually rather than the list as a whole. Bug 1452.
826 Required for reasonable handling of multiple headers_ options when
827 they may be empty; requires that headers_remove items with embedded
828 colons must have them doubled (or the list-separator changed).
830 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
831 view the policy declared in the DMARC record. Currently, $dmarc_status
832 is a combined value of both the record presence and the result of the
835 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
837 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
838 dnslookup router and the smtp transport (applying to the forward
841 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
842 of ldap servers used for a specific lookup. Patch provided by Heiko
845 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
846 New variable $lookup_dnssec_authenticated for observability.
848 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
849 Patch submitted by Lars Timman.
851 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
853 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
854 Requires trusted mode and valid format message id, aborts otherwise.
855 Patch contributed by Heiko Schlichting.
857 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
858 certextract with support for various fields. Bug 1358.
860 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
861 is requested by default, modifiable by smtp transport option
864 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
865 operate on certificate variables to give certificate fingerprints
866 Also new ${sha256:cert_variable}.
868 JH/23 The PRDR feature is moved from being Experimental into the mainline.
870 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
871 Christian Aistleitner.
873 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
875 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
876 file. Patch from Wolfgang Breyha.
878 JH/25 Expand the coverage of the delivery $host and $host_address to
879 client authenticators run in verify callout. Bug 1476.
881 JH/26 Port service names are now accepted for tls_on_connect_ports, to
882 align with daemon_smtp_ports. Bug 72.
884 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
885 support and error reporting did not work properly.
887 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
888 and is readable. Patch from Andrew Colin Kissa.
890 TL/14 Enhance documentation of ${run expansion and how it parses the
891 commandline after expansion, particularly in the case when an
892 unquoted variable expansion results in an empty value.
894 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
896 PP/02 Fix internal collision of T_APL on systems which support RFC3123
897 by renaming away from it. Addresses GH issue 15, reported by
900 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
902 TL/15 SECURITY: prevent double expansion in math comparison functions
903 (can expand unsanitized data). Not remotely exploitable.
910 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
912 PP/02 Make -n do something, by making it not do something.
913 When combined with -bP, the name of an option is not output.
915 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
918 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
919 $sender_host_name and config options to manage this, and basic check
922 PP/05 DSCP support for outbound connections and control modifier for inbound.
924 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
925 (Only plugin which currently uses this is kerberos4, which nobody should
926 be using, but we should make it available and other future plugins might
927 conceivably use it, even though it would break NAT; stuff *should* be
928 using channel bindings instead).
930 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
931 name; added for Sendmail compatibility; requires admin caller.
932 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
933 just ignore it); requires trusted caller.
934 Also parse but ignore: -Ac -Am -X<logfile>
937 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
939 TL/02 Add +smtp_confirmation as a default logging option.
941 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
942 Patch by Magnus Holmgren from 2007-02-20.
944 TL/04 Bugzilla 1281 - Spec typo.
945 Bugzilla 1283 - Spec typo.
946 Bugzilla 1290 - Spec grammar fixes.
948 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
950 TL/06 Add Experimental DMARC support using libopendmarc libraries.
952 TL/07 Fix an out of order global option causing a segfault. Reported to dev
953 mailing list by by Dmitry Isaikin.
955 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
957 JH/02 Support "G" suffix to numbers in ${if comparisons.
959 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
961 NM/01 Bugzilla 1197 - Spec typo
962 Bugzilla 1196 - Spec examples corrections
964 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
966 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
967 gnutls_enable_pkcs11, but renamed to more accurately indicate its
970 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
971 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
973 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
974 "acl {{name}{arg}...}", and optional args on acl condition
977 JH/05 Permit multiple router/transport headers_add/remove lines.
979 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
981 JH/07 Avoid using a waiting database for a single-message-only transport.
982 Performance patch from Paul Fisher. Bugzilla 1262.
984 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
987 JH/09 Add $headers_added variable, with content from use of ACL modifier
988 add_header (but not yet added to the message). Bugzilla 199.
990 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
991 Pulled from Bugzilla 817 by Wolfgang Breyha.
993 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
995 (nb: this is the same fix as in Exim 4.80.1)
997 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1000 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1003 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1005 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1006 advertise SMTP AUTH mechanism to us, instead of a generic
1007 protocol violation error. Also, make Exim more robust to bad
1008 data from the Dovecot auth socket.
1010 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1012 When a queue runner is handling a message, Exim first routes the
1013 recipient addresses, during which it prunes them based on the retry
1014 hints database. After that it attempts to deliver the message to
1015 any remaining recipients. It then updates the hints database using
1018 So if a recipient address works intermittently, it can get repeatedly
1019 deferred at routing time. The retry hints record remains fresh so the
1020 address never reaches the final cutoff time.
1022 This is a fairly common occurrence when a user is bumping up against
1023 their storage quota. Exim had some logic in its local delivery code
1024 to deal with this. However it did not apply to per-recipient defers
1025 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1027 This change adds a proper retry rule check during routing so that the
1028 final cutoff time is checked against the message's age. We only do
1029 this check if there is an address retry record and there is not a
1030 domain retry record; this implies that previous attempts to handle
1031 the address had the retry_use_local_parts option turned on. We use
1032 this as an approximation for the destination being like a local
1033 delivery, as in LMTP.
1035 I suspect this new check makes the old local delivery cutoff check
1036 redundant, but I have not verified this so I left the code in place.
1038 TF/02 Correct gecos expansion when From: is a prefix of the username.
1040 Test 0254 submits a message to Exim with the header
1044 When I ran the test suite under the user fanf2, Exim expanded
1045 the header to contain my full name, whereas it should have added
1046 a Resent-Sender: header. It erroneously treats any prefix of the
1047 username as equal to the username.
1049 This change corrects that bug.
1051 GF/01 DCC debug and logging tidyup
1052 Error conditions log to paniclog rather than rejectlog.
1053 Debug lines prefixed by "DCC: " to remove any ambiguity.
1055 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1057 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1058 Bug spotted by Jeremy Harris; was flawed since initial commit.
1059 Would have resulted in OCSP responses post-SNI triggering an Exim
1060 NULL dereference and crash.
1062 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1064 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1065 Bug detection, analysis and fix by Samuel Thibault.
1066 Bugzilla 1331, Debian bug #698092.
1068 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1070 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1071 Server implementation by Todd Lyons, client by JH.
1072 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1073 config variable "prdr_enable" controls whether the server
1074 advertises the facility. If the client requests PRDR a new
1075 acl_data_smtp_prdr ACL is called once for each recipient, after
1076 the body content is received and before the acl_smtp_data ACL.
1077 The client is controlled by both of: a hosts_try_prdr option
1078 on the smtp transport, and the server advertisement.
1079 Default client logging of deliveries and rejections involving
1080 PRDR are flagged with the string "PRDR".
1082 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1083 fclose(). Diagnosis by Todd Lyons.
1085 PP/17 Update configure.default to handle IPv6 localhost better.
1086 Patch by Alain Williams (plus minor tweaks).
1089 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1090 This is now consistent with GnuTLS, and is now documented: the
1091 previous undocumented portable approach to treating the option as
1092 unset was to force an expansion failure. That still works, and
1093 an empty string is now equivalent.
1095 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1096 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1097 not performing validation itself.
1099 PP/20 Added force_command boolean option to pipe transport.
1100 Patch from Nick Koston, of cPanel Inc.
1102 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1105 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1107 PP/21 Fix eximon continuous updating with timestamped log-files.
1108 Broken in a format-string cleanup in 4.80, missed when I repaired the
1109 other false fix of the same issue.
1110 Report and fix from Heiko Schlichting.
1113 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1114 Report from Prashanth Katuri.
1116 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1117 It's SecureTransport, so affects any MacOS clients which use the
1118 system-integrated TLS libraries, including email clients.
1120 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1121 using a MIME ACL for non-SMTP local injection.
1122 Report and assistance in diagnosis by Warren Baker.
1124 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1126 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1128 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1129 last id that failed so it may be referenced in subsequent ACL's.
1131 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1134 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1135 ldap library initialization, allowing self-signed CA's to be
1136 used. Also properly sets require_cert option later in code by
1137 using NULL (global ldap config) instead of ldap handle (per
1138 session). Bug diagnosis and testing by alxgomz.
1140 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1141 the src/util/ subdirectory.
1143 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1144 renamed to Transport Post Delivery Action by Jeremy Harris, as
1147 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1148 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1149 redis_servers = needs to be configured which will be used by the redis
1150 lookup. Patch from Warren Baker, of The Packet Hub.
1152 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1154 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1155 hostname or reverse DNS when processing a host list. Used suggestions
1156 from multiple comments on this bug.
1158 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1160 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1161 Missed a few lines, added it to make the runtest require no keyboard
1164 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1165 contains upper case chars. Make router use caseful_local_part.
1167 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1168 support when GnuTLS has been built with p11-kit.
1174 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1176 This, or similar/improved, will also be change PP/11 of 4.82.
1182 PP/01 Handle short writes when writing local log-files.
1183 In practice, only affects FreeBSD (8 onwards).
1184 Bugzilla 1053, with thanks to Dmitry Isaikin.
1186 NM/01 Bugzilla 949 - Documentation tweak
1188 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1191 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1193 PP/02 Implemented gsasl authenticator.
1195 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1197 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1198 `pkg-config foo` for cflags/libs.
1200 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1201 with rest of GSASL and with heimdal_gssapi.
1203 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1204 `pkg-config foo` for cflags/libs for the TLS implementation.
1206 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1207 properties get this fed in as external SSF. A number of robustness
1208 and debugging improvements to the cyrus_sasl authenticator.
1210 PP/08 cyrus_sasl server now expands the server_realm option.
1212 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1213 Patch by Jeremy Harris.
1215 PP/10 Added dbmjz lookup type.
1217 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1219 PP/12 MAIL args handles TAB as well as SP, for better interop with
1220 non-compliant senders.
1221 Analysis and variant patch by Todd Lyons.
1223 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1224 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1225 Patch from Dirk Mueller <dmueller@suse.com>
1227 PP/13 tls_peerdn now print-escaped for spool files.
1228 Observed some $tls_peerdn in wild which contained \n, which resulted
1229 in spool file corruption.
1231 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1232 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1233 or write after TLS renegotiation, which otherwise led to messages
1236 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1237 as a tracking header (ie: a signed header comes before the signature).
1238 Patch from Wolfgang Breyha.
1240 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1241 comma-sep list; embedded commas doubled.
1243 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1245 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1247 Report and patch from Dmitry Banschikov.
1249 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1250 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1251 failures. We appear to now support TLS1.1+ with Exim.
1253 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1254 lets Exim select keys and certificates based upon TLS SNI from client.
1255 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1256 before an outbound SMTP session. New log_selector, +tls_sni.
1258 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1259 NULL dereference. Report and patch from Alun Jones.
1261 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1262 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1263 Not seeing resolver debug output on NetBSD, but suspect this is a
1264 resolver implementation change.
1266 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1267 Left warnings. Added "eximon gdb" invocation mode.
1269 PP/21 Defaulting "accept_8bitmime" to true, not false.
1271 PP/22 Added -bw for inetd wait mode support.
1273 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1274 locate the relevant includes and libraries. Made this the default.
1276 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1277 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1279 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1280 This may cause build issues on older platforms.
1282 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1283 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1284 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1285 Added SNI support via GnuTLS too.
1286 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1288 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1290 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1291 Applied second patch from Janne, implementing suggestion to default
1292 multiple-strings-in-record handling to match SPF spec.
1294 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1296 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1297 read-only, out of scope).
1298 Patch from Wolfgang Breyha, report from Stuart Northfield.
1300 PP/29 Fix three issues highlighted by clang analyser static analysis.
1301 Only crash-plausible issue would require the Cambridge-specific
1302 iplookup router and a misconfiguration.
1303 Report from Marcin Mirosław.
1305 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1307 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1308 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1309 As part of this, removing so much warning spew let me fix some minor
1310 real issues in debug logging.
1312 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1313 assignment on my part. Fixed.
1315 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1316 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1317 Janne Snabb (who went above and beyond: thank you).
1319 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1320 string otherwise requires a connection and a bunch more work and it's
1321 relatively easy to get wrong. Should also expose TLS library linkage
1324 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1325 64-bit ${eval} (JH/03).
1327 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1328 GNU libc to support some of the 64-bit stuff, should not lead to
1329 conflicts. Defined before os.h is pulled in, so if a given platform
1330 needs to override this, it can.
1332 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1333 protection layer was required, which is not implemented.
1334 Bugzilla 1254, patch from Wolfgang Breyha.
1336 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1337 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1338 tls_dhparam take prime identifiers. Also unbreak combination of
1339 OpenSSL+DH_params+TLSSNI.
1341 PP/39 Disable SSLv2 by default in OpenSSL support.
1347 PP/01 Solaris build fix for Oracle's LDAP libraries.
1348 Bugzilla 1109, patch from Stephen Usher.
1350 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1352 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1355 TF/02 Fix a couple more cases where we did not log the error message
1356 when unlink() failed. See also change 4.74-TF/03.
1358 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1359 lock up or crash if it happened to be inside a call to libc when it
1360 got a SIGUSR1 from exiwhat.
1362 The SIGUSR1 handler appends the current process status to the process
1363 log which is later printed by exiwhat. It used to use the general
1364 purpose logging code to do this, but several functions it calls are
1365 not safe for signals.
1367 The new output code in the SIGUSR1 handler is specific to the process
1368 log, and simple enough that it's easy to inspect for signal safety.
1369 Removing some special cases also simplifies the general logging code.
1370 Removing the spurious timestamps from the process log simplifies
1373 TF/04 Improved ratelimit ACL condition.
1375 The /noupdate option has been deprecated in favour of /readonly which
1376 has clearer semantics. The /leaky, /strict, and /readonly update modes
1377 are mutually exclusive. The update mode is no longer included in the
1378 database key; it just determines when the database is updated. (This
1379 means that when you upgrade Exim will forget old rate measurements.)
1381 Exim now checks that the per_* options are used with an update mode that
1382 makes sense for the current ACL. For example, when Exim is processing a
1383 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1384 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1385 must specify per_mail/readonly. If you omit the update mode it defaults to
1386 /leaky where that makes sense (as before) or /readonly where required.
1388 The /noupdate option is now undocumented but still supported for
1389 backwards compatibility. It is equivalent to /readonly except that in
1390 ACLs where /readonly is required you may specify /leaky/noupdate or
1391 /strict/noupdate which are treated the same as /readonly.
1393 A useful new feature is the /count= option. This is a generalization
1394 of the per_byte option, so that you can measure the throughput of other
1395 aggregate values. For example, the per_byte option is now equivalent
1396 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1398 The per_rcpt option has been generalized using the /count= mechanism
1399 (though it's more complicated than the per_byte equivalence). When it is
1400 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1401 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1402 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1403 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1404 Note that using per_rcpt with a non-readonly update mode in more than
1405 one ACL will cause the recipients to be double-counted. (The per_mail
1406 and per_byte options don't have this problem.)
1408 The handling of very low rates has changed slightly. If the computed rate
1409 is less than the event's count (usually one) then this event is the first
1410 after a long gap. In this case the rate is set to the same as this event's
1411 count, so that the first message of a spam run is counted properly.
1413 The major new feature is a mechanism for counting the rate of unique
1414 events. The new per_addr option counts the number of different
1415 recipients that someone has sent messages to in the last time period. It
1416 behaves like per_rcpt if all the recipient addresses are different, but
1417 duplicate recipient addresses do not increase the measured rate. Like
1418 the /count= option this is a general mechanism, so the per_addr option
1419 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1420 example, measure the rate that a client uses different sender addresses
1421 with the options per_mail/unique=$sender_address. There are further
1422 details in the main documentation.
1424 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1426 TF/06 Removed a few PCRE remnants.
1428 TF/07 Automatically extract Exim's version number from tags in the git
1429 repository when doing development or release builds.
1431 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1432 Bugzilla 879. Patch from Paul Fisher.
1434 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1435 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1438 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1440 PP/05 Variable $av_failed, true if the AV scanner deferred.
1441 Bugzilla 1078. Patch from John Horne.
1443 PP/06 Stop make process more reliably on build failure.
1444 Bugzilla 1087. Patch from Heiko Schlittermann.
1446 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1447 Bugzilla 1089. Patch from Heiko Schlittermann.
1449 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1450 Bugzilla 1131. Patch from Holger Weiß.
1452 PP/09 Handle IPv6 addresses with SPF.
1453 Bugzilla 860. Patch from Wolfgang Breyha.
1455 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1457 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1460 PP/11 match_* no longer expand right-hand-side by default.
1461 New compile-time build option, EXPAND_LISTMATCH_RHS.
1462 New expansion conditions, "inlist", "inlisti".
1464 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1466 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1468 PP/14 fix log_write() format string regression from TF/03.
1469 Bugzilla 1152. Patch from Dmitry Isaikin.
1475 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1477 PP/02 Harmonised TLS library version reporting; only show if debugging.
1478 Layout now matches that introduced for other libraries in 4.74 PP/03.
1480 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1482 PP/04 New "dns_use_edns0" global option.
1484 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1487 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1488 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1490 TK/01 Updated PolarSSL code to 0.14.2.
1491 Bugzilla 1097. Patch from Andreas Metzler.
1493 PP/07 Catch divide-by-zero in ${eval:...}.
1494 Fixes bugzilla 1102.
1496 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1499 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1500 format-string attack -- SECURITY: remote arbitrary code execution.
1502 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1503 time unintentionally subject to list matching rules, letting the header
1504 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1505 arbitrary string expansion). This allowed for information disclosure.
1507 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1508 INT_MIN/-1 -- value coerced to INT_MAX.
1514 NM/01 Workaround for PCRE version dependency in version reporting
1517 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1518 This fixes portability to compilers other than gcc, notably
1519 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1521 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1522 makefiles for portability to HP-UX and POSIX correctness.
1524 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1525 Also via indented variable definition in the Makefile.
1526 (Debugging by Oliver Heesakkers).
1528 PP/02 Restore caching of spamd results with expanded spamd_address.
1529 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1531 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1532 Improves build reliability. Fix from: Frank Elsner
1534 NM/02 Fix wide character breakage in the rfc2047 coding
1535 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1537 NM/03 Allow underscore in dnslist lookups
1538 Fixes bug 1026. Patch from Graeme Fowler
1540 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1541 Code patches from Adam Ciarcinski of NetBSD.
1543 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1546 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1547 is logged, to avoid truncation. Patch from John Horne.
1549 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1550 Patch from Jakob Hirsch.
1552 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1553 SQL string expansion failure details.
1554 Patch from Andrey Oktyabrski.
1556 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1557 Patch from Simon Arlott.
1559 PP/09 New lookups functionality failed to compile on old gcc which rejects
1560 extern declarations in function scope.
1561 Patch from Oliver Fleischmann
1563 PP/10 Use sig_atomic_t for flags set from signal handlers.
1564 Check getgroups() return and improve debugging.
1565 Fixed developed for diagnosis in bug 927 (which turned out to be
1568 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1569 Patch from Mark Zealey.
1571 PP/12 Bugzilla 1056: Improved spamd server selection.
1572 Patch from Mark Zealey.
1574 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1575 Based on patch from Heiko Schlittermann.
1577 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1578 Patch from Uwe Doering, sign-off by Michael Haardt.
1580 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1581 variable declaration deep within a block. Bug and patch from
1584 PP/15 lookups-Makefile IRIX compatibility coercion.
1586 PP/16 Make DISABLE_DKIM build knob functional.
1588 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1589 Patch by Simon Arlott
1591 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1592 variable argument macros. Our copy now differs from upstream.
1598 TF/01 Failure to get a lock on a hints database can have serious
1599 consequences so log it to the panic log.
1601 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1602 controlled using the smtp_confirmation log selector.
1604 TF/03 Include the error message when we fail to unlink a spool file.
1606 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1607 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1608 for maintaining out-of-tree patches for some time.
1610 PP/01 Bugzilla 139: Documentation and portability issues.
1611 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1612 Handle per-OS dynamic-module compilation flags.
1614 PP/02 Let /dev/null have normal permissions.
1615 The 4.73 fixes were a little too stringent and complained about the
1616 permissions on /dev/null. Exempt it from some checks.
1617 Reported by Andreas M. Kirchwitz.
1619 PP/03 Report version information for many libraries, including
1620 Exim version information for dynamically loaded libraries. Created
1621 version.h, now support a version extension string for distributors
1622 who patch heavily. Dynamic module ABI change.
1624 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1625 privilege escalation vulnerability whereby the Exim run-time user
1626 can cause root to append content of the attacker's choosing to
1629 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1632 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1633 If dropping privileges for untrusted macros, we disabled normal logging
1634 on the basis that it would fail; for the Exim run-time user, this is not
1635 the case, and it resulted in successful deliveries going unlogged.
1636 Fixed. Reported by Andreas Metzler.
1642 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1643 only prepend for the Resent-* case. Fixes regression introduced in
1644 Exim 4.70 by NM/22 for Bugzilla 607.
1646 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1647 increasing numbers of administrators be bitten by this.
1649 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1651 PP/03 Bugzilla 994: added openssl_options main configuration option.
1653 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1655 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1657 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1659 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1660 without a peer certificate, leading to a segfault because of an
1661 assumption that peers always have certificates. Be a little more
1662 paranoid. Problem reported by Martin Tscholak.
1664 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1665 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1666 NB: ClamAV planning to remove STREAM in "middle of 2010".
1667 CL also introduces -bmalware, various -d+acl logging additions and
1668 more caution in buffer sizes.
1670 PP/09 Implemented reverse_ip expansion operator.
1672 PP/10 Bugzilla 937: provide a "debug" ACL control.
1674 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1676 PP/12 Bugzilla 973: Implement --version.
1678 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1680 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1682 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1684 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1685 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1686 ignore trailing whitespace.
1688 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1690 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1693 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1694 Notification from Dr Andrew Aitchison.
1696 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1697 ExtendedDetectionInfo response format.
1698 Notification from John Horne.
1700 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1703 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1704 XSL and documented dependency on system catalogs, with examples of how
1707 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1710 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1711 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1712 configuration file which is writeable by the Exim user or group.
1714 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1715 of configuration files to cover files specified with the -C option if
1716 they are going to be used with root privileges, not just the default
1719 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1720 option (effectively making it always true).
1722 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1723 files to be used while preserving root privileges.
1725 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1726 that rogue child processes cannot use them.
1728 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1729 run-time user, instead of root.
1731 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1732 Exim run-time user without dropping privileges.
1734 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1735 result string, instead of calling string_vformat() twice with the same
1738 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1739 for other users. Others should always drop root privileges if they use
1740 -C on the command line, even for a whitelisted configure file.
1742 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1744 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1750 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1751 $data_path, and $header_path variables; fixed documentation bugs and
1754 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1755 exipick to access non-standard spools, including the "frozen" queue
1758 NM/01 Bugzilla 965: Support mysql stored procedures.
1759 Patch from Alain Williams
1761 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1763 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1764 Patch from Andreas Metzler
1766 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1767 Patch from Kirill Miazine
1769 NM/05 Bugzilla 671: Added umask to procmail example.
1771 JJ/03 installed exipick 20100323.0, fixing doc bug
1773 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1774 directory. Notification and patch from Dan Rosenberg.
1776 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1778 TK/02 Improve log output when DKIM signing operation fails.
1780 MH/01 Treat the transport option dkim_domain as a colon separated
1781 list, not as a single string, and sign the message with each element,
1782 omitting multiple occurences of the same signer.
1784 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1785 Bugzilla 985, 986. Patch by Simon Arlott
1787 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1788 Patch by Simon Arlott
1790 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1791 MBX locking. Notification from Dan Rosenberg.
1797 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1799 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1801 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1803 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1805 NM/04 Bugzilla 915: Flag broken perl installation during build.
1811 TK/01 Added patch by Johannes Berg that expands the main option
1812 "spamd_address" if it starts with a dollar sign.
1814 TK/02 Write list of recipients to X-Envelope-Sender header when building
1815 the mbox-format spool file for content scanning (suggested by Jakob
1818 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1819 (http://www.dcc-servers.net/) support via dccifd. Activated by
1820 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1822 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1823 by Mark Daniel Reidel <mr@df.eu>.
1825 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1826 When building exim an external PCRE library is now needed -
1827 PCRE is a system library on the majority of modern systems.
1828 See entry on PCRE_LIBS in EDITME file.
1830 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1831 conversation. Added nologin parameter to request.
1832 Patch contributed by Kirill Miazine.
1834 TF/01 Do not log submission mode rewrites if they do not change the address.
1836 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1838 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1839 log files in place. Contributed by Roberto Lima.
1841 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1843 TF/03 Bugzilla 615: When checking the local_parts router precondition
1844 after a local_part_suffix or local_part_prefix option, Exim now
1845 does not use the address's named list lookup cache, since this
1846 contains cached lookups for the whole local part.
1848 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1849 Robert Millan. Documentation is in experimental-spec.txt.
1851 TF/04 Bugzilla 668: Fix parallel build (make -j).
1853 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1855 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1856 Patch provided by Jan Srzednicki.
1858 TF/05 Leading white space used to be stripped from $spam_report which
1859 wrecked the formatting. Now it is preserved.
1861 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1862 that they are available at delivery time.
1864 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1866 TF/08 TLS error reporting now respects the incoming_interface and
1867 incoming_port log selectors.
1869 TF/09 Produce a more useful error message if an SMTP transport's hosts
1870 setting expands to an empty string.
1872 NM/06 Bugzilla 744: EXPN did not work under TLS.
1873 Patch provided by Phil Pennock.
1875 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1876 Patch provided by Richard Godbee.
1878 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1879 acl_smtp_notquit, added index entry.
1881 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1882 Patch provided by Eugene Bujak.
1884 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1885 accept(). Patch provided by Maxim Dounin.
1887 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1888 Patch provided by Phil Pennock.
1890 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1892 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1893 Patch provided by Brad "anomie" Jorsch.
1895 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1896 Patch provided by Dean Brooks.
1898 TK/05 Add native DKIM support (does not depend on external libraries).
1900 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1901 Patch provided by Graeme Fowler.
1903 NM/16 Bugzilla 851: Documentation example syntax fix.
1905 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1907 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1910 NM/19 Bugzilla 745: TLS version reporting.
1911 Patch provided by Phil Pennock.
1913 NM/20 Bugzilla 167: bool: condition support.
1914 Patch provided by Phil Pennock.
1916 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1917 clients. Patch provided by Phil Pennock.
1919 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1920 Patch provided by Brad "anomie" Jorsch.
1922 NM/23 Bugzilla 687: Fix misparses in eximstats.
1923 Patch provided by Heiko Schlittermann.
1925 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1926 Patch provided by Heiko Schlittermann.
1928 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1929 plus update to original patch.
1931 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1933 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1934 Patch provided by David Brownlee.
1936 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1938 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1940 NM/30 Bugzilla 888: TLS documentation bugfixes.
1942 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1944 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1945 Unlike the original bugzilla I have changed all shell scripts in src tree.
1947 NM/33 Bugzilla 898: Transport filter timeout fix.
1948 Patch by Todd Rinaldo.
1950 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1951 Patch by Serge Demonchaux.
1953 NM/35 Bugzilla 39: Base64 decode bug fixes.
1954 Patch by Jakob Hirsch.
1956 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1958 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1960 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1962 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1968 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1969 ALT-N's libdkim that I have put here:
1970 http://duncanthrax.net/exim-experimental/
1972 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1973 were called 'true' and it seems that C99 defines that as a reserved
1974 keyword to be used with 'bool' variable types. That means you could
1975 not include C99-style headers which use bools without triggering
1976 build errors in sieve.c.
1978 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1979 as mailq or other aliases. Changed the --help handling significantly
1980 to do whats expected. exim_usage() emits usage/help information.
1982 SC/01 Added the -bylocaldomain option to eximstats.
1984 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1986 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1988 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1994 PH/01 Another patch from the Sieve maintainer.
1996 PH/02 When an IPv6 address is converted to a string for single-key lookup
1997 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1998 dots are used instead of colons so that keys in lsearch files need not
1999 contain colons. This was done some time before quoting was made available
2000 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2001 (notated using the quote facility) so as to distinguish them from IPv4
2002 keys. This meant that lookups for IP addresses in host lists did not work
2003 for iplsearch lookups.
2005 This has been fixed by arranging for IPv6 addresses to be expressed with
2006 colons if the lookup type is iplsearch. This is not incompatible, because
2007 previously such lookups could never work.
2009 The situation is now rather anomalous, since one *can* have colons in
2010 ordinary lsearch keys. However, making the change in all cases is
2011 incompatible and would probably break a number of configurations.
2013 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2016 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2017 conversion specification without a maximum field width, thereby enabling
2018 a rogue spamd server to cause a buffer overflow. While nobody in their
2019 right mind would setup Exim to query an untrusted spamd server, an
2020 attacker that gains access to a server running spamd could potentially
2021 exploit this vulnerability to run arbitrary code as the Exim user.
2023 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2024 $primary_hostname instead of what libspf2 thinks the hosts name is.
2026 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2027 a directory entry by the name of the lookup key. Previously, if a
2028 symlink pointed to a non-existing file or a file in a directory that
2029 Exim lacked permissions to read, a lookup for a key matching that
2030 symlink would fail. Now it is enough that a matching directory entry
2031 exists, symlink or not. (Bugzilla 503.)
2033 PH/03 The body_linecount and body_zerocount variables are now exported in the
2036 PH/04 Added the $dnslist_matched variable.
2038 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2039 This means they are set thereafter only if the connection becomes
2042 PH/06 Added the client_condition to authenticators so that some can be skipped
2043 by clients under certain conditions.
2045 PH/07 The error message for a badly-placed control=no_multiline_responses left
2046 "_responses" off the end of the name.
2048 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2050 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2051 (without spaces) instead of just copying the configuration text.
2053 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2055 PH/11 Added $max_received_linelength.
2057 PH/12 Added +ignore_defer and +include_defer to host lists.
2059 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2060 way in which PCRE > 7.0 is built.
2062 PH/14 Implemented queue_only_load_latch.
2064 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2065 MAIL command. The effect was to mangle the value on 64-bit systems.
2067 PH/16 Another patch from the Sieve maintainer.
2069 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2071 PH/18 If a system quota error occurred while trying to create the file for
2072 a maildir delivery, the message "Mailbox is full" was not appended to the
2073 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2074 only to a quota excession during the actual writing of the file.
2076 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2077 characters?) which causes problems in log lines. The DN values are now
2078 passed through string_printing() before being added to log lines.
2080 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2081 and InterBase are left for another time.)
2083 PH/21 Added message_body_newlines option.
2085 PH/22 Guard against possible overflow in moan_check_errorcopy().
2087 PH/23 POSIX allows open() to be a macro; guard against that.
2089 PH/24 If the recipient of an error message contained an @ in the local part
2090 (suitably quoted, of course), incorrect values were put in $domain and
2091 $local_part during the evaluation of errors_copy.
2097 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2098 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2101 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2102 issue a MAIL command.
2104 PH/02 In an ACL statement such as
2106 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2108 if a client was not listed at all, or was listed with a value other than
2109 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2110 the condition was not true (as it should be), so access was not denied.
2111 The bug was that the ! inversion was incorrectly passed on to the second
2112 item. This has been fixed.
2114 PH/03 Added additional dnslists conditions == and =& which are different from
2115 = and & when the dns lookup returns more than one IP address.
2117 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2118 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2120 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2121 FSYNC, which compiles an option called disable_fsync that allows for
2122 bypassing fsync(). The documentation is heavily laced with warnings.
2124 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2126 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2127 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2128 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2129 including adding "make clean"; (3) Added -fPIC when compiling the test
2130 dynamically loaded module, to get rid of a warning.
2132 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2133 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2134 = 0s. The bug is otherwise harmless.
2136 PH/07 There was a bug in the dovecot authenticator such that the value of
2137 $auth1 could be overwritten, and so not correctly preserved, after a
2138 successful authentication. This usually meant that the value preserved by
2139 the server_setid option was incorrect.
2141 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2143 PH/09 Installed PCRE release 7.0.
2145 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2146 run for batched SMTP input. It is now run at the start of every message
2147 in the batch. While fixing this I discovered that the process information
2148 (output by running exiwhat) was not always getting set for -bs and -bS
2149 input. This is fixed, and it now also says "batched" for BSMTP.
2151 PH/11 Added control=no_pipelining.
2153 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2154 patch, slightly modified), and move the expansion of helo_data till after
2155 the connection is made in the smtp transport (so it can use these
2158 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2160 PH/14 Added log_selector = +pid.
2162 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2164 PH/16 Add ${if forany and ${if forall.
2166 PH/17 Added dsn_from option to vary the From: line in DSNs.
2168 PH/18 Flush SMTP output before performing a callout, unless control =
2169 no_callout_flush is set.
2171 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2172 was true (the default) a successful delivery failed to delete the retry
2173 item, thus causing premature timeout of the address. The bug is now
2176 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2178 PH/21 Long custom messages for fakedefer and fakereject are now split up
2179 into multiline responses in the same way that messages for "deny" and
2180 other ACL rejections are.
2182 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2183 with slight modification.
2185 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2186 draft, changing the syntax and factoring some duplicate code".
2188 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2189 for deliveries of the second and subsequent messages over the same SMTP
2192 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2193 ${reduce, with only minor "tidies".
2195 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2197 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2198 expansion side effects.
2200 PH/27 When a message times out after an over-quota error from an Exim-imposed
2201 quota, the bounce message says "mailbox is full". This message was not
2202 being given when it was a system quota that was exceeded. It now should
2205 MH/03 Made $recipients available in local_scan(). local_scan() already has
2206 better access to the recipient list through recipients_list[], but
2207 $recipients can be useful in postmaster-provided expansion strings.
2209 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2210 in the case of a MAIL command with additional options following the
2211 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2212 were accidentally chopped off.
2214 PH/29 SMTP synchronization checks are implemented when a command is read -
2215 there is a check that no more input is waiting when there shouldn't be
2216 any. However, for some commands, a delay in an ACL can mean that it is
2217 some time before the response is written. In this time, more input might
2218 arrive, invalidly. So now there are extra checks after an ACL has run for
2219 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2220 pipelining has not been advertised.
2222 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2224 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2225 returned in the SMTP response when smtp_return_error_details was false.
2226 This has been fixed.
2228 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2229 instead of the C I/O that was originally supplied, because problems were
2230 reported on Solaris.
2232 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2233 Exim which did not show up earlier: it was assuming that a call to
2234 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2235 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2236 was a macro that became an assignment, so it seemed to work. This has
2237 changed to a proper function call with a void return, hence the compile
2238 error. Exim's code has been fixed.
2240 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2243 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2245 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2247 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2248 because it turns out to be too big or there is a timeout) there is no
2249 "Completed" line in the log. When some messages of this type were
2250 selected by exigrep, they were listed as "not completed". Others were
2251 picked up by some special patterns. I have improved the selection
2252 criteria to be more general.
2254 PH/38 The host_find_failed option in the manualroute router can now be set
2255 to "ignore", to completely ignore a host whose IP address cannot be
2256 found. If all hosts are ignored, the behaviour is controlled by the new
2257 host_all_ignored option.
2259 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2260 homing or because of multiple MX records with /mx) generated more than
2261 one IP address, and the following item turned out to be the local host,
2262 all the secondary addresses of the first item were incorrectly removed
2263 from the list, along with the local host and any following hosts (which
2264 is what is supposed to happen).
2266 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2267 whoever called Exim into the -H file. In the case of the daemon it was
2268 behaving confusingly. When first started, it used values for whoever
2269 started the daemon, but after a SIGHUP it used the Exim user (because it
2270 calls itself on a restart). I have changed the code so that it now always
2273 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2274 message are rejected with the same error (e.g. no authentication or bad
2275 sender address), and a DATA command is nevertheless sent (as can happen
2276 with PIPELINING or a stupid MUA), the error message that was given to the
2277 RCPT commands is included in the rejection of the DATA command. This is
2278 intended to be helpful for MUAs that show only the final error to their
2281 PH/42 Another patch from the Sieve maintainer.
2283 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2284 Eximstats - Fixed some broken HTML links and added missing column headers
2286 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2287 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2289 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2291 PH/43 Yet another patch from the Sieve maintainer.
2293 PH/44 I found a way to check for a TCP/IP connection going away before sending
2294 the response to the final '.' that terminates a message, but only in the
2295 case where the client has not sent further data following the '.'
2296 (unfortunately, this is allowed). However, in many cases there won't be
2297 any further data because there won't be any more messages to send. A call
2298 to select() can be used: if it shows that the input is "ready", there is
2299 either input waiting, or the socket has been closed. An attempt to read
2300 the next input character can distinguish the two cases. Previously, Exim
2301 would have sent an OK response which the client would never have see.
2302 This could lead to message repetition. This fix should cure that, at
2303 least in a lot of common cases.
2305 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2306 advertised in response to EHLO.
2312 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2313 fixed by 4.65/MH/01 (is this a record?) are fixed:
2315 (i) An empty string was always treated as zero by the numeric comparison
2316 operators. This behaviour has been restored.
2318 (ii) It is documented that the numeric comparison operators always treat
2319 their arguments as decimal numbers. This was broken in that numbers
2320 starting with 0 were being interpreted as octal.
2322 While fixing these problems I realized that there was another issue that
2323 hadn't been noticed. Values of message_size_limit (both the global option
2324 and the transport option) were treated as octal if they started with 0.
2325 The documentation was vague. These values are now always treated as
2326 decimal, and I will make that clear in the documentation.
2332 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2333 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2336 MH/01 Don't check that the operands of numeric comparison operators are
2337 integers when their expansion is in "skipping" mode (fixes bug
2338 introduced by 4.64-PH/07).
2340 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2341 child addresses, Exim now panics and dies. Previously, because the count
2342 is held in a short int, deliveries were likely to be lost. As such a
2343 large number of recipients for a single message is ridiculous
2344 (performance will be very, very poor), I have chosen to impose a limit
2345 rather than extend the field.
2351 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2352 leftover -K file (the existence of which was triggered by #402).
2353 While we were at it, introduced process PID as part of the -K
2354 filename. This should rule out race conditions when creating
2357 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2358 processing considerably. Previous code took too long for large mails,
2359 triggering a timeout which in turn triggers #401.
2361 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2362 in the DK code in transports.c. sendfile() is not really portable,
2363 hence the _LINUX specificness.
2365 TF/01 In the add_headers option to the mail command in an Exim filter,
2366 there was a bug that Exim would claim a syntax error in any
2367 header after the first one which had an odd number of characters
2370 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2371 callout verification, Exim cached a "reject" for the entire domain. This
2372 is correct for most verifications, but it is not correct for a recipient
2373 verification with use_sender or use_postmaster set, because in that case
2374 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2375 case of MAIL FROM:<> rejection from other early rejections (e.g.
2376 rejection of HELO). When verifying a recipient using a non-null MAIL
2377 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2378 Whatever the result of the callout, the value of the domain cache is
2379 left unchanged (for any other kind of callout, getting as far as trying
2380 RCPT means that the domain itself is ok).
2382 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2385 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2386 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2387 session, the daemon ignores ECONNECT errors and logs others; it now
2388 ignores EPIPE as well.
2390 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2391 (quoted-printable decoding).
2393 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2394 later the small subsequent patch to fix an introduced bug.
2396 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2398 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2400 PH/08 An error is now given if message_size_limit is specified negative.
2402 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2403 to be given (somewhat) arbitrary names.
2405 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2408 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2409 miscellaneous code fixes
2411 PH/10 Added the log_reject_target ACL modifier to specify where to log
2414 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2415 hostname. This is wrong, because it relates to the incoming message (and
2416 probably the interface on which it is arriving) and not to the outgoing
2417 callout (which could be using a different interface). This has been
2418 changed to use the value of the helo_data option from the smtp transport
2419 instead - this is what is used when a message is actually being sent. If
2420 there is no remote transport (possible with a router that sets up host
2421 addresses), $smtp_active_hostname is used.
2423 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2424 tweaks were necessary in order to get it to work (see also 21 below):
2425 (a) The code assumed that strncpy() returns a negative number on buffer
2426 overflow, which isn't the case. Replaced with Exim's string_format()
2428 (b) There were several signed/unsigned issues. I just did the minimum
2429 hacking in of casts. There is scope for a larger refactoring.
2430 (c) The code used strcasecmp() which is not a standard C function.
2431 Replaced with Exim's strcmpic() function.
2432 (d) The code set only $1; it now sets $auth1 as well.
2433 (e) A simple test gave the error "authentication client didn't specify
2434 service in request". It would seem that Dovecot has changed its
2435 interface. Fortunately there's a specification; I followed it and
2436 changed what the client sends and it appears to be working now.
2438 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2441 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2442 address A is aliased to B and C, where B exists and C does not. Without
2443 -v the output is "A verified" because verification stops after a
2444 successful redirection if more than one address is generated. However,
2445 with -v the child addresses are also verified. Exim was outputting "A
2446 failed to verify" and then showing the successful verification for C,
2447 with its parentage. It now outputs "B failed to verify", showing B's
2448 parentage before showing the successful verification of C.
2450 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2451 look up a TXT record in a specific list after matching in a combined
2454 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2455 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2456 they consult the DNS. I had assumed they would set it the way they
2457 wanted; and indeed my experiments on Linux seem to show that in some
2458 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2459 To be on the safe side, however, I have now made the interface to
2460 host_find_byname() similar to host_find_bydns(), with an argument
2461 containing the DNS resolver options. The host_find_byname() function now
2462 sets these options at its start, just as host_find_bydns() does. The smtp
2463 transport options dns_qualify_single and dns_search_parents are passed to
2464 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2465 of host_find_byname() use the default settings of RES_DEFNAMES
2466 (qualify_single) but not RES_DNSRCH (search_parents).
2468 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2469 spool_read_header() do less string testing, by means of a preliminary
2470 switch on the second character of optional "-foo" lines. (This is
2471 overdue, caused by the large number of possibilities that now exist.
2472 Originally there were few.) While I was there, I also converted the
2473 str(n)cmp tests so they don't re-test the leading "-" and the first
2474 character, in the hope this might squeeze out yet more improvement.
2476 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2477 flag allowing group syntax was set by the header_syntax check but not
2478 turned off, possible causing trouble later; (2) The flag was not being
2479 set at all for the header_verify test, causing "group"-style headers to
2480 be rejected. I have now set it in this case, and also caused header_
2481 verify to ignore an empty address taken from a group. While doing this, I
2482 came across some other cases where the code for allowing group syntax
2483 while scanning a header line wasn't quite right (mostly, not resetting
2484 the flag correctly in the right place). These bugs could have caused
2485 trouble for malformed header lines. I hope it is now all correct.
2487 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2488 with the "reply" argument non-NULL. The code, however (which originally
2489 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2490 but it didn't always do it. This confused somebody who was copying the
2491 code for some other use. I have removed all the tests.
2493 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2494 feature that was used to support insecure browsers during the U.S. crypto
2495 embargo. It requires special client support, and Exim is probably the
2496 only MTA that supported it -- and would never use it because real RSA is
2497 always available. This code has been removed, because it had the bad
2498 effect of slowing Exim down by computing (never used) parameters for the
2499 RSA_EXPORT functionality.
2501 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2502 authenticator to fail if there's a tab character in the incoming data
2503 (there should never be unless someone is messing about, as it's supposed
2504 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2505 if the connection is using TLS or if the remote IP is the same as the
2506 local IP, and the "valid-client-cert option" if a client certificate has
2509 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2510 authenticators. This can be used for authorization after authentication
2511 succeeds. (In the case of plaintext, it servers for both authentication
2514 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2515 if any retry times were supplied.
2517 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2518 connection, where there is no client IP address to check. In this
2519 situation, the verify now always succeeds.
2521 PH/25 Applied John Jetmore's -Mset patch.
2523 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2525 PH/27 In a string expansion for a processed (not raw) header when multiple
2526 headers of the same name were present, leading whitespace was being
2527 removed from all of them, but trailing whitespace was being removed only
2528 from the last one. Now trailing whitespace is removed from each header
2529 before concatenation. Completely empty headers in a concatenation (as
2530 before) are ignored.
2532 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2533 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2535 PH/29 [Removed. This was a change that I later backed out, and forgot to
2536 correct the ChangeLog entry (that I had efficiently created) before
2537 committing the later change.]
2539 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2540 address errors (4xx response to RCPT) over the same connection as other
2541 messages routed to the same hosts. Such deliveries are always "forced",
2542 so retry times are not inspected. This resulted in far too many retries
2543 for the affected addresses. The effect occurred only when there were more
2544 hosts than the hosts_max_try setting in the smtp transport when it had
2545 the 4xx errors. Those hosts that it had tried were not added to the list
2546 of hosts for which the message was waiting, so if all were tried, there
2547 was no problem. Two fixes have been applied:
2549 (i) If there are any address or message errors in an SMTP delivery, none
2550 of the hosts (tried or untried) are now added to the list of hosts
2551 for which the message is waiting, so the message should not be a
2552 candidate for sending over the same connection that was used for a
2553 successful delivery of some other message. This seems entirely
2554 reasonable: after all the message is NOT "waiting for some host".
2555 This is so "obvious" that I'm not sure why it wasn't done
2556 previously. Hope I haven't missed anything, but it can't do any
2557 harm, as the worst effect is to miss an optimization.
2559 (ii) If, despite (i), such a delivery is accidentally attempted, the
2560 routing retry time is respected, so at least it doesn't keep
2561 hammering the server.
2563 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2564 in ${readsocket because some servers need this prod.
2566 PH/32 Added some extra debug output when updating a wait-xxx database.
2568 PH/33 The hint "could be header name not terminated by colon", which has been
2569 given for certain expansion errors for a long time, was not being given
2570 for the ${if def:h_colon_omitted{... case.
2572 PH/34 The spec says: "With one important exception, whenever a domain list is
2573 being scanned, $domain contains the subject domain." There was at least
2574 one case where this was not true.
2576 PH/35 The error "getsockname() failed: connection reset by peer" was being
2577 written to the panic log as well as the main log, but it isn't really
2578 panic-worthy as it just means the connection died rather early on. I have
2579 removed the panic log writing for the ECONNRESET error when getsockname()
2582 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2583 runs only) independently of the message's sender address. This meant
2584 that, if the 4xx error was in fact related to the sender, a different
2585 message to the same recipient with a different sender could confuse
2586 things. In particular, this can happen when sending to a greylisting
2587 server, but other circumstances could also provoke similar problems.
2588 I have changed the default so that the retry time for these errors is now
2589 based a combination of the sender and recipient addresses. This change
2590 can be overridden by setting address_retry_include_sender=false in the
2593 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2594 remote server are returned as part of bounce messages. This was not
2595 happening for LMTP over a pipe (the lmtp transport), but now it is the
2596 same for both kinds of LMTP.
2598 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2599 in header lines that were in fact CNAMEs. This is no longer the case.
2601 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2602 and queue runs started by the daemon processed all messages. This has
2603 been fixed so that -R and -S can now usefully be given with -q<time>.
2605 PH/40 Import PCRE release 6.7 (fixes some bugs).
2607 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2609 PH/42 Give an error if -q is specified more than once.
2611 PH/43 Renamed the variables $interface_address and $interface_port as
2612 $received_ip_address and $received_port, to make it clear that these
2613 values apply to message reception, and not to the outgoing interface when
2614 a message is delivered. (The old names remain recognized, of course.)
2616 PH/44 There was no timeout on the connect() call when using a Unix domain
2617 socket in the ${readsocket expansion. There now is.
2619 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2620 be meaningful with "accept".
2622 SC/01 Eximstats V1.43
2623 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2625 SC/02 Eximstats V1.44
2626 Use a glob alias rather than an array ref in the generated
2627 parser. This improves both readability and performance.
2629 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2630 Collect SpamAssassin and rejection statistics.
2631 Don't display local sender or destination tables unless
2632 there is data to show.
2633 Added average volumes into the top table text output.
2635 SC/04 Eximstats V1.46
2636 Collect data on the number of addresses (recipients)
2637 as well as the number of messages.
2639 SC/05 Eximstats V1.47
2640 Added 'Message too big' to the list of mail rejection
2641 reasons (thanks to Marco Gaiarin).
2643 SC/06 Eximstats V1.48
2644 Mainlog lines which have GMT offsets and are too short to
2645 have a flag are now skipped.
2647 SC/07 Eximstats V1.49 (Alain Williams)
2648 Added the -emptyok flag.
2650 SC/08 Eximstats V1.50
2651 Fixes for obtaining the IP address from reject messages.
2653 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2654 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2655 whitespace changes from 4.64-PH/27
2657 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2660 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2661 are found, allow negative numbers in numeric criteria)
2663 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2665 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2666 to match changes made in 4.64-PH/43
2668 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2670 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2671 "domain" is actually an IP address, and force a failure. This locks out
2672 those revolvers/nameservers that support "A-for-A" lookups, in
2673 contravention of the specifications.
2675 PH/48 When a host name was looked up from an IP address, and the subsequent
2676 forward lookup of the name timed out, the host name was left in
2677 $sender_host_name, contrary to the specification.
2679 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2680 restricted to single-key lookups, Exim was not diagnosing an error if
2681 * or *@ was used with a query-style lookup.
2683 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2685 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2686 long ago, but noone interested enough thought of it. Let's just say that
2687 the "1.1" means that there are some new functions that weren't there at
2688 some point in the past.
2690 PH/51 Error processing for expansion failure of helo_data from an smtp
2691 transport during callout processing was broken.
2693 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2694 tested/used via the -bh/-bhc/-bs options.
2696 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2697 bug, fixed in subsequent PCRE releases).
2699 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2700 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2702 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2708 SC/01 Use a glob alias rather than an array ref in eximstats generated
2709 parser. This improves both readability and performance.
2711 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2712 Don't display local sender or destination tables in eximstats unless
2713 there is data to show.
2714 Added average volumes into the eximstats top table text output.
2716 SC/03 Collect data on the number of addresses (recipients) as well
2717 as the number of messages in eximstats.
2719 TF/01 Correct an error in the documentation for the redirect router. Exim
2720 does (usually) call initgroups() when daemonizing.
2722 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2723 with consistent privilege compared to when running as a daemon.
2725 TF/03 Note in the spec that $authenticated_id is not set for local
2726 submissions from trusted users.
2728 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2729 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2731 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2732 by adding some example configuration directives to the default
2733 configuration file. A little bit of work is required to uncomment the
2734 directives and define how usernames and passwords are checked, but
2735 there is now a framework to start from.
2737 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2738 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2739 without this. I don't know how relevant this is to other LDAP libraries.
2741 PH/02 Add the verb name to the "unknown ACL verb" error.
2743 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2745 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2747 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2748 directory not expanded when it should be if an expanded home directory
2749 was set for the address (which is overridden by the transport).
2751 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2754 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2755 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2756 because it is too late at that time, and has no effect.
2758 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2759 security issue with \' (bugzilla #107). I could not use the
2760 PQescapeStringConn() function, because it needs a PGconn value as one of
2763 PH/08 When testing addresses using -bt, indicate those final addresses that
2764 are duplicates that would not cause an additional delivery. At least one
2765 person was confused, thinking that -bt output corresponded to deliveries.
2766 (Suppressing duplicates isn't a good idea as you lose the information
2767 about possibly different redirections that led to the duplicates.)
2769 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2770 systems where poll() doesn't work, in particular OS X.
2772 PH/10 Added more information to debugging output for retry time not reached.
2774 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2775 operations in malware.c.
2777 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2780 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2781 syslog_duplication set false, log lines that would normally be written
2782 both the the main log and to the reject log were not written to syslog at
2785 PH/14 In the default configuration, change the use of "message" in ACL warn
2786 statements to "add_header".
2788 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2789 not followed by a command (e.g. "seen endif").
2791 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2792 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2795 PH/17 Added extra conditions to the default value of delay_warning_condition
2799 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2800 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2801 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2804 The Auto-Submitted: and various List- headers are standardised, whereas I
2805 don't think Precedence: ever was.
2807 PH/18 Refactored debugging code in route_finduser() to show more information,
2808 in particular, the error code if getpwnam() issues one.
2810 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2811 This is apparently needed in addition to the PH/07 change above to avoid
2812 any possible encoding problems.
2814 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2815 but not after initializing Perl.
2817 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2818 output them only if debugging. By default they are written stderr,
2819 apparently, which is not desirable.
2821 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2824 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2827 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2829 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2830 authenticated or an ident call has been made. Suppress the default
2831 values for $authenticated_id and $authenticated_sender (but permit -oMai
2832 and -oMas) when testing with -bh.
2834 PH/24 Re-jigged the order of the tests in the default configuration so that the
2835 tests for valid domains and recipients precede the DNS black list and CSA
2836 tests, on the grounds that those ones are more expensive.
2838 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2839 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2840 This bug exists in every version of Exim that I still have, right back to
2843 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2844 However, an attempt to turn on case-sensitivity in a regex key by
2845 including (?-i) didn't work because the subject string was already
2846 lowercased, and the effects were non-intuitive. It turns out that a
2847 one-line patch can be used to allow (?-i) to work as expected.
2853 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2854 other effects) broke the use of negated acl sub-conditions.
2856 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2859 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2860 "Deny" causes Exim to reject the incoming connection with a 554 error.
2861 Unfortunately, if there is a major crisis, such as a disk failure,
2862 tcp-wrappers gives "deny", whereas what one would like would be some
2863 kind of temporary error. A kludge has been added to help with this.
2864 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2865 554 error is used if errno is still zero or contains ENOENT (which occurs
2866 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2869 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2871 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2872 errors. Otherwise a message that provokes a temporary error (when other
2873 messages do not) can cause a whole host to time out.
2875 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2876 addresses were routed directly to files or pipes from a redirect router.
2877 File deliveries just didn't batch; pipe deliveries might have suffered
2880 PH/06 A failure to get a lock for a hints database would erroneously always say
2881 "Failed to get write lock", even when it was really a read lock.
2883 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2884 of 0600. This has been changed to use the value of the lockfile_mode
2885 option (which defaults to 0600).
2887 PH/08 Applied small patch from the Sieve maintainer.
2889 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2890 folder from quota calculations, a direct delivery into this folder messed
2891 up the contents of the maildirsize file. This was because the regex was
2892 used only to exclude .Trash (or whatever) when the size of the mailbox
2893 was calculated. There was no check that a delivery was happening into an
2894 excluded directory. This bug has been fixed by ignoring all quota
2895 processing for deliveries into excluded directories.
2897 PH/10 Added the maildirfolder_create_regex option to appendfile.
2903 PH/01 The code for finding all the local interface addresses on a FreeBSD
2904 system running IPv6 was broken. This may well have applied to all BSD
2905 systems, as well as to others that have similar system calls. The broken
2906 code found IPv4 interfaces correctly, but gave incorrect values for the
2907 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2908 that it would not match correctly against @[] and not recognize the IPv6
2911 PH/02 The ipliteral router was not recognizing addresses of the form user@
2912 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2914 PH/03 Added disable_ipv6.
2916 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2917 decoded form, because it is most often used to construct To: headers
2918 lines in autoreplies, and the decoded form may well be syntactically
2919 invalid. However, $reply_address has leading white space removed, and all
2920 newlines turned into spaces so that the autoreply transport does not
2923 PH/05 If group was specified without a user on a router, and no group or user
2924 was specified on a transport, the group from the router was ignored.
2926 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2927 for visible compile-time settings that can be used to change these
2928 numbers, for those that want even more. Backwards compatibility with old
2929 spool files has been maintained. However, going back to a previous Exim
2930 release will lost any variables that are in spool files.
2932 PH/07 Two small changes when running in the test harness: increase delay when
2933 passing a TCP/IP connection to a new process, in case the original
2934 process has to generate a bounce, and remove special handling of
2935 127.0.0.2 (sic), which is no longer necessary.
2937 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2938 be the same on different OS.
2940 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2943 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2944 whether --show-vars was specified or not
2946 JJ/02 exipick: Added support for new ACL variable spool format introduced
2949 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2950 syntactically invalid From: or Reply-to: line, and a filter used this to
2951 generate an autoreply, and therefore failed to obtain an address for the
2952 autoreply, Exim could try to deliver to a non-existent relative file
2953 name, causing unrelated and misleading errors. What now happens is that
2954 it logs this as a hard delivery error, but does not attempt to create a
2957 PH/11 The exinext utility has a -C option for testing purposes, but although
2958 the given file was scanned by exinext itself; it wasn't being passed on
2959 when Exim was called.
2961 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2962 an end-of-file indication when reading a command response.
2964 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2965 compiled. In many other places in Exim, IPv6 addresses are always
2966 recognized, so I have changed this. It also means that IPv4 domain
2967 literals of the form [IPV4:n.n.n.n] are now always recognized.
2969 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2970 used if the router is not running as root, for example, when verifying at
2971 ACL time, or when using -bh. The debugging output from this situation was
2972 non-existent - all you got was a failure to exec. I have made two
2975 (a) Failures to set uid/gid, the current directory, or a process leader
2976 in a subprocess such as that created by queryprogram now generate
2977 suitable debugging output when -d is set.
2979 (b) The queryprogram router detects when it is not running as root,
2980 outputs suitable debugging information if -d is set, and then runs
2981 the subprocess without attempting to change uid/gid.
2983 PH/15 Minor change to Makefile for building test_host (undocumented testing
2986 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2987 additional section of a DNS packet that returns MX or SRV records.
2988 Instead, it always explicitly searches for A/AAAA records. This avoids
2989 major problems that occur when a DNS server includes only records of one
2990 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2991 fixed another bug: if SRV records were looked up and the corresponding
2992 address records were *not* found in the additional section, the port
2993 values from the SRV records were lost.
2995 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2996 using the correct key (the original address) when searching the retry
2997 rules in order to find which one to use for generating the retry hint.
2999 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3000 adding the default one. Similarly, if it contains a Reply-To: header, the
3001 errors_reply_to option, if set, is not used.
3003 PH/19 When calculating a retry time, Exim used to measure the "time since
3004 failure" by looking at the "first failed" field in the retry record. Now
3005 it does not use this if it is later than than the arrival time of the
3006 message. Instead it uses the arrival time. This makes for better
3007 behaviour in cases where some deliveries succeed, thus re-setting the
3008 "first failed" field. An example is a quota failure for a huge message
3009 when small messages continue to be delivered. Without this change, the
3010 "time since failure" will always be short, possible causing more frequent
3011 delivery attempts for the huge message than are intended.
3012 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3014 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3015 $1, $2, $3) because the numerical variables can be reset during some
3016 expansion items (e.g. "match"), thereby losing the authentication data.
3018 PH/21 Make -bV show the size of off_t variables so that the test suite can
3019 decide whether to run tests for quotas > 2G.
3021 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3022 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3023 filecount value is greater than 2G or if a quota value is greater than 2G
3024 on a system where the size of off_t is not greater than 4, a panic error
3027 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3028 never match. The debug and -bh output now contains an explicit error
3029 message indicating a malformed IPv4 address or mask.
3031 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3032 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3033 PH/23 above applies.
3035 PH/25 Do not write to syslog when running in the test harness. The only
3036 occasion when this arises is a failure to open the main or panic logs
3037 (for which there is an explicit test).
3039 PH/26 Added the /no_tell option to "control=freeze".
3041 PH/27 If a host name lookup failed very early in a connection, for example, if
3042 the IP address matched host_lookup and the reverse lookup yielded a name
3043 that did not have a forward lookup, an error message of the form "no IP
3044 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3045 could be logged. Now it outputs the IP address instead of "NULL".
3047 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3048 allows the sender and the authenticated sender to be set when
3049 submitting a message from within Exim. Since child_open_exim() is
3050 documented for local_scan(), the new function should be too.
3052 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3053 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3054 results in an empty string is now treated as unset.
3056 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3058 PH/31 Added sender_verify_fail logging option.
3060 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3061 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3062 tidied the source and removed it altogether.
3064 PH/33 When a queue run was abandoned because the load average was too high, a
3065 log line was always written; now it is written only if the queue_run log
3066 selector is set. In addition, the log line for abandonment now contains
3067 information about the queue run such as the pid. This is always present
3068 in "start" and "stop" lines but was omitted from the "abandon" line.
3070 PH/34 Omit spaces between a header name and the colon in the error message that
3071 is given when verify = headers_syntax fails (if there are lots of them,
3072 the message gets confusing).
3074 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3075 names, as there are now some PTR records that contain slashes. This check
3076 is only to protect against broken name servers that fall over on strange
3077 characters, so the fact that it applies to all lookups doesn't matter.
3079 PH/36 Now that the new test suite is complete, we can remove some of the
3080 special code in Exim that was needed for the old test suite. For example,
3081 sorting DNS records because real resolvers return them in an arbitrary
3082 order. The new test suite's fake resolver always returns records in the
3085 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3086 bounces) except when queue_only is set, to avoid logging races between
3087 the different processes.
3089 PH/38 Panic-die if .include specifies a non-absolute path.
3091 PH/39 A tweak to the "H" retry rule from its user.
3093 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3094 a label. They prevented compilation on older perls.
3096 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3097 a warning to be raised on newish perls.
3099 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3100 on queue. Changes to match documented behaviour of showing count of
3101 messages matching specified criteria.
3103 PH/40 Changed the default ident timeout from 30s to 5s.
3105 PH/41 Added support for the use of login_cap features, on those BSD systems
3106 that have them, for controlling the resources used by pipe deliveries.
3108 PH/42 The content-scanning code uses fopen() to create files in which to put
3109 message data. Previously it was not paying any attention to the mode of
3110 the files. Exim runs with umask(0) because the rest of the code creates
3111 files with open(), and sets the required mode explicitly. Thus, these
3112 files were ending up world-writeable. This was not a big issue, because,
3113 being within the spool directory, they were not world-accessible. I have
3114 created a function called modefopen, which takes an additional mode
3115 argument. It sets umask(777), creates the file, chmods it to the required
3116 mode, then resets the umask. All the relevant calls to fopen() in the
3117 content scanning code have been changed to use this function.
3119 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3120 to 24 hours. This avoids potential overflow problems when processing G
3121 and H retry rules. I suspect nobody ever tinkers with this value.
3123 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3125 PH/45 When the plaintext authenticator is running as a client, the server's
3126 challenges are checked to ensure they are valid base64 strings. By
3127 default, the authentication attempt is cancelled if an invalid string is
3128 received. Setting client_ignore_invalid_base64 true ignores these errors.
3129 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3130 they are received. Thus, the responses can be made to depend on the
3131 challenges. If an invalid string is ignored, an empty string is placed in
3134 PH/46 Messages that are created by the autoreply transport now contains a
3135 References: header, in accordance with RFCs 2822 and 3834.
3137 PH/47 Added authenticated_sender_force to the smtp transport.
3139 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3141 PH/49 Installed latest patch from the Sieve maintainer.
3143 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3144 was also set, the appendfile transport was unnecessarily scanning a
3145 directory of message files (e.g. for maildir delivery) to find the count
3146 of files (along with the size), even though it did not need this
3147 information. It now does the scan only if it needs to find either the
3148 size of the count of files.
3150 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3152 PH/52 Two bugs concerned with error handling when the smtp transport is
3155 (i) Exim was not creating retry information for temporary errors given
3156 for individual recipients after the DATA command when the smtp transport
3157 was used in LMTP mode. This meant that they could be retried too
3158 frequently, and not timed out correctly.
3160 (ii) Exim was setting the flag that allows error details to be returned
3161 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3162 recipients that were returned after the DATA command.
3164 PH/53 This is related to PH/52, but is more general: for any failing address,
3165 when detailed error information was permitted to be returned to the
3166 sender, but the error was temporary, then after the final timeout, only
3167 "retry timeout exceeded" was returned. Now it returns the full error as
3168 well as "retry timeout exceeded".
3170 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3171 do this, and (what is worse) MTAs that accept it.
3173 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3174 will now be deprecated.
3176 PH/56 New os.c-cygwin from the Cygwin maintainer.
3178 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3179 formats (previously only available in exim formats via -bpr, -bpru,
3180 and -bpra. Now also available in native and exiqgrep formats)
3182 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3183 with very large, slow to parse queues
3185 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3187 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3189 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3190 responses to authentication challenges, though it was showing the
3191 challenges; (ii) I've removed the CR characters from the debug output for
3194 PH/58 Allow for the insertion of a newline as well as a space when a string
3195 is turned into more than one encoded-word during RFC 2047 encoding. The
3196 Sieve code now uses this.
3198 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3199 data_4xx, lost_connection, tls_required.
3201 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3202 message was being sent as an SMTP response.
3204 PH/61 Add -l and -k options to exicyclog.
3206 PH/62 When verifying, if an address was redirected to one new address, so that
3207 verification continued, and the new address failed or deferred after
3208 having set something in $address_data, the value of $address_data was not
3209 passed back to the ACL. This was different to the case when no
3210 redirection occurred. The value is now passed back in both cases.
3212 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3213 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3214 use login_cap.h, so on its own it isn't the distinguishing feature. The
3215 new name refers directly to the setclassresources() function.
3217 PH/65 Added configuration files for NetBSD3.
3219 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3221 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3222 is preferred over IPv4.
3224 PH/68 The bounce_return_message and bounce_return_body options were not being
3225 honoured for bounces generated during the reception of non-SMTP messages.
3226 In particular, this applied to messages rejected by the ACL. This bug has
3227 been fixed. However, if bounce_return_message is true and bounce_return_
3228 body is false, the headers that are returned for a non-SMTP message
3229 include only those that have been read before the error was detected.
3230 (In the case of an ACL rejection, they have all been read.)
3232 PH/69 The HTML version of the specification is now built in a directory called
3233 spec_html instead of spec.html, because the latter looks like a path with
3234 a MIME-type, and this confuses some software.
3236 PH/70 Catch two compiler warnings in sieve.c.
3238 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3239 function verify_get_ident() calls ip_connect() to connect a socket, but
3240 if the "connect()" function timed out, ip_connect() used to close the
3241 socket. However, verify_get_ident() also closes the socket later, and in
3242 between Exim writes to the log, which may get opened at this point. When
3243 the socket was closed in ip_connect(), the log could get the same file
3244 descriptor number as the socket. This naturally causes chaos. The fix is
3245 not to close the socket in ip_connect(); the socket should be closed by
3246 the function that creates it. There was only one place in the code where
3247 this was missing, in the iplookup router, which I don't think anybody now
3248 uses, but I've fixed it anyway.
3250 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3251 well as to direct DNS lookups. Otherwise the handling of names in host
3252 lists is inconsistent and therefore confusing.
3258 PH/01 Two changes to the default runtime configuration:
3260 (1) Move the checks for relay_from_hosts and authenticated clients from
3261 after to before the (commented out) DNS black list checks.
3263 (2) Add control=submission to the relay_from_hosts and authenticated
3264 clients checks, on the grounds that messages accepted by these
3265 statements are most likely to be submissions.
3267 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3269 (1) Generate an error if the third argument for the ${prvs expansion is
3272 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3275 (3) Reset the variables that are obtained from the first argument of
3276 ${prvscheck and used in the second argument before leaving the code,
3277 because their memory is reclaimed, so using them afterwards may do
3280 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3281 one (it's much easier than Tom thought :-).
3283 (5) Because of (4), we can now allow for the use of $prvscheck_result
3284 inside the third argument.
3286 PH/03 For some reason, the default setting of PATH when running a command from
3287 a pipe transport was just "/usr/bin". I have changed it to
3290 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3291 anything to be listed in the output from -bV.
3293 PH/05 When a filter generated an autoreply, the entire To: header line was
3294 quoted in the delivery log line, like this:
3296 => >A.N.Other <ano@some.domain> <original@ddress> ...
3298 This has been changed so that it extracts the operative address. There
3299 may be more than one such address. If so, they are comma-separated, like
3302 => >ano@some.domain,ona@other.domain <original@ddress> ...
3304 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3305 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3306 not being looked up in the rDNS to get a host name, Exim was showing the
3307 IP address twice in Received: lines, even though the IP addresses were
3308 identical. For example:
3310 Received: from [1.2.3.4] (helo=[1.2.3.4])
3312 However, if the real host name was known, it was omitting the HELO data
3313 if it matched the actual IP address. This has been tidied up so that it
3314 doesn't show the same IP address twice.
3316 PH/07 When both +timestamp and +memory debugging was on, the value given by
3317 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3318 called by the debug printing, thereby overwriting the timestamp buffer.
3319 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3321 PH/08 When the original message was included in an autoreply transport, it
3322 always said "this is a copy of the message, including all the headers",
3323 even if body_only or headers_only was set. It now gives an appropriate
3326 PH/09 Applied a patch from the Sieve maintainer which:
3328 o fixes some comments
3329 o adds the (disabled) notify extension core
3330 o adds some debug output for the result of if/elsif tests
3331 o points to the current vacation draft in the documentation
3332 and documents the missing references header update
3336 o fixes a bug in processing the envelope test (when testing
3337 multiple envelope elements, the last element determined the
3340 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3341 Electronic Mail") by including:
3343 Auto-submitted: auto-generated
3345 in the messages that it generates (bounce messages and others, such as
3346 warnings). In the case of bounce messages for non-SMTP messages, there was
3347 also a typo: it was using "Auto_submitted" (underscore instead of
3348 hyphen). Since every message generated by Exim is necessarily in response
3349 to another message, thes have all been changed to:
3351 Auto-Submitted: auto-replied
3353 in accordance with these statements in the RFC:
3355 The auto-replied keyword:
3357 - SHOULD be used on messages sent in direct response to another
3358 message by an automatic process,
3360 - MUST NOT be used on manually-generated messages,
3362 - MAY be used on Delivery Status Notifications (DSNs) and Message
3363 Disposition Notifications (MDNs),
3365 - MUST NOT be used on messages generated by automatic or periodic
3366 processes, except for messages which are automatic responses to
3369 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3370 to the default Received: header definition.
3372 PH/12 Added log selector acl_warn_skipped (default on).
3374 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3375 variables because (a) they are in the wrong storage pool and (b) even if
3376 they were copied, it wouldn't work properly because of the caching.
3378 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3379 checking when decoding. Apparently there are clients that generate
3380 overlong encoded strings. Why am I not surprised?
3382 PH/15 If the first argument of "${if match_address" was not empty, but did not
3383 contain an "@" character, Exim crashed. Now it writes a panic log message
3384 and treats the condition as false.
3386 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3388 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3389 extension "envelope-auth". The code is finished and in agreement with
3390 other implementations, but there is no documentation so far and in fact,
3391 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3392 not changing the active code.
3394 Print executed "if" and "elsif" statements when debugging is used. This
3395 helps a great deal to understand what a filter does.
3397 Document more things not specified clearly in RFC3028. I had all this
3398 sorted out, when out of a sudden new issues came to my mind. Oops."
3400 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3403 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3404 canonical form (as documented). However, after a host name lookup from
3405 the IP address, check_host() was doing a simple string comparison with
3406 addresses acquired from the DNS when checking that the found name did
3407 have the original IP as one of its addresses. Since any found IPv6
3408 addresses are likely to be in abbreviated form, the comparison could
3409 fail. Luckily, there already exists a function for doing the comparison
3410 by converting both addresses to binary, so now that is used instead of
3411 the text comparison.
3413 PH/20 There was another similar case to PH/19, when a complete host name was
3414 given in a host list; looking up its IP address could give an abbreviated
3415 form, whereas the current host's name might or might not be abbreviated.
3416 The same fix has been applied.
3422 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3423 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3426 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3427 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3429 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3431 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3432 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3433 Also, for "Auto-Submitted", treat anything other than "no" as
3434 non-personal, in accordance with RFC 3834. (Previously it treated
3435 anything starting "auto-" as non-personal.)
3437 TF/01 The control=submission/name=... option had a problem with syntax
3438 errors if the name included a slash character. The /name= option
3439 now slurps the rest of the string, so it can include any characters
3440 but it must come last in the list of options (after /sender_retain
3443 PH/05 Some modifications to the interface to the fake nameserver for the new
3451 TK/01 Added the "success_on_redirect" address verification option. See
3452 NewStuff for rationale and an example.
3454 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3456 PH/02 Patch to exigrep to allow it to work on syslog lines.
3458 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3459 fread() to skip over the body file's header line, because in Cygwin the
3460 header line is locked and is inaccessible.
3462 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3463 co-exist for some time) to make it clear that it is the Exim ID that is
3464 referenced, not the Message-ID: header line.
3466 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3467 string_format() function, because snprintf() does not exist on all
3470 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3471 ${stat: expansion item.
3473 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3474 protocol synchronization error", to keep the pedants happy.
3476 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3477 well as for IRIX systems, when gcc is being used. See the host.c source
3480 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3482 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3485 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3486 transport and to the smtp transport in LMTP mode.
3488 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3490 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3491 run a filter in a subprocess. This could lead to confusion in subsequent
3492 lookups in the parent process. There should also be a search_tidyup() at
3493 the end of the subprocess.
3495 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3496 only if the host matched helo_try_verify_hosts, which caused the
3497 verification to occur when the EHLO/HELO command was issued. The ACL just
3498 tested the remembered result. Now, if a previous verification attempt has
3499 not happened, "verify = helo" does it there and then.
3501 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3503 TK/03 Fix log output including CR from clamd.
3505 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3506 exist provoked a memory error which could cause a segfault.
3508 PH/15 Installed PCRE 6.2
3510 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3512 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3513 of the problem. Specifically, suggested +O2 rather than +O1 for the
3516 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3518 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3519 record, the port was not correctly logged when the outgoing_port log
3520 selector was set (it logged the transort's default port).
3522 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3523 fallback_hosts, and "hosts" in the smtp transport.
3525 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3526 host errors such as "Connection refused".
3528 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3529 authentication with radiusclient 0.4.9:
3531 - Error returned from rc_read_config was caught wrongly
3532 - Username/password not passed on to radius server due to wrong length.
3534 The presumption is that some radiusclient API changes for 4.51/PH/17
3535 were not taken care of correctly. The code is still untested by me (my
3536 Linux distribution still has 0.3.2 of radiusclient), but it was
3537 contributed by a Radius user.
3539 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3540 expanding the "port" option of the smtp transport.
3542 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3543 while reading a MIME header. Thanks to Tom Hughes for a patch.
3545 PH/24 Include config.h inside local_scan.h so that configuration settings are
3548 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3549 that in an ACL for RCPT (for example), you can examine exactly what was
3552 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3553 commands, but it was not correctly comparing the address with the actual
3554 client host address. Thus, it would show the EHLO address in Received:
3555 header lines when this was not necessary.
3557 PH/27 Added the % operator to ${eval:}.
3559 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3560 it should be ignoring failures (because with -C, for example, it has lost
3561 privilege). It wasn't ignoring creation failures other than "already
3564 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3567 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3568 because an input line was too long, either on its own, or by virtue of
3569 too many continuations, the temporary file was not being removed, and the
3570 return code was incorrect.
3572 PH/31 Missing "BOOL" in function definition in filtertest.c.
3574 PH/32 Applied Sieve patches from the maintainer.
3576 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3578 PH/33 Added "verify = not_blind".
3580 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3581 Local/Makefile (with some defaults set). These are used in built scripts
3582 such as exicyclog, but they have never been used in the exim_install
3583 script (though there are many overriding facilities there). I have
3584 arranged that the exim_install script now takes note of these two
3587 PH/35 Installed configuration files for Dragonfly.
3589 PH/36 When a locally submitted message by a trusted user did not contain a
3590 From: header, and the sender address was obtained from -f or from an SMTP
3591 MAIL command, and the trusted user did not use -F to supply a sender
3592 name, $originator_name was incorrectly used when constructing a From:
3593 header. Furthermore, $originator_name was used for submission mode
3594 messages from external hosts without From: headers in a similar way,
3595 which is clearly wrong.
3597 PH/37 Added control=suppress_local_fixups.
3599 PH/38 When log_selector = +received_sender was set, and the addition of the
3600 sender made the log line's construction buffer exactly full, or one byte
3601 less than full, an overflow happened when the terminating "\n" was
3604 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3605 when the result of a list match is failure because a DNS lookup failed.
3607 PH/40 RM_COMMAND is now used in the building process.
3609 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3610 the "build-* directories that it finds.
3612 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3613 address in a domain literal was a prefix of an interface address.
3615 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3616 when verifying a sender address, unless rewrite_headers is false.
3618 PH/44 Wrote a long comment about why errors_to addresses are verified as
3619 recipients, not senders.
3621 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3622 the ratelimit ACL was added.
3624 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3626 PH/46 Added extra information about PostgreSQL errors to the error string.
3628 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3629 avoiding the need to install special zones in a real server. This is
3630 backwards compatible; if it can't find the fake resolver, it drops back.
3631 Thus, both old and new test suites can be run.
3633 TF/02 Added util/ratelimit.pl
3635 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3636 clock is set back in time.
3638 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3639 Candler <B.Candler@pobox.com>.
3641 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3642 OK for addresses that are the result of redirections.
3644 PH/48 A number of further additions for the benefit of the new test suite,
3645 including a fake gethostbyname() that interfaces to the fake DNS resolver
3648 TF/06 The fix for widen_domains has also been applied to qualify_single and
3649 search_parents which are the other dnslookup options that can cause
3652 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3655 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3657 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3658 service" if it encountered an MX record with an empty target hostname.
3659 The message is now "an MX or SRV record indicated no SMTP service".
3661 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3662 if the DNS of the sending site is misconfigured. This is quite a
3663 common situation. This change restores the behaviour of treating a
3664 helo verification defer as a failure.
3666 PH/51 If self=fail was set on a router, the bounce message did not include the
3667 actual error message.
3673 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3675 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3676 command itself ended in error, the underlying message about the transport
3677 filter timeout was being overwritten with the pipe command error. Now the
3678 underlying error message should be appended to the second error message.
3680 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3682 PH/02 Reduce the amount of output that "make" produces by default. Full output
3683 can still be requested.
3685 PH/03 The warning log line about a condition test deferring for a "warn" verb
3686 was being output only once per connection, rather than after each
3687 occurrence (because it was using the same function as for successful
3688 "warn" verbs). This seems wrong, so I have changed it.
3690 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3691 it should not have, which might have caused a crash in the right
3692 circumstances, but probably never did.
3694 PH/04 Installed a modified version of Tony Finch's patch to make submission
3695 mode fix the return path as well as the Sender: header line, and to
3696 add a /name= option so that you can make the user's friendly name appear
3699 TF/03 Added the control = fakedefer ACL modifier.
3701 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3702 Mark Lowes for thorough testing.
3704 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3706 TK/03 Merged latest SRS patch from Miles Wilton.
3708 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3709 with the definition in sysexits.h (which is #included earlier).
3710 Fortunately, Exim does not actually use EX_OK. The code used to try to
3711 preserve the sysexits.h value, by assuming that macro definitions were
3712 scanned for macro replacements. I have been disabused of this notion,
3713 so now the code just undefines EX_OK before #including unistd.h.
3715 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3716 in the smtp transport. When a block could not be written in a single
3717 write() function, the timeout was being re-applied to each part-write.
3718 This seems wrong - if the receiver was accepting one byte at a time it
3719 would take for ever. The timeout is now adjusted when this happens. It
3720 doesn't have to be particularly precise.
3722 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3723 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3725 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3726 without a domain if the check to <postmaster@domain> fails.
3728 SC/01 Eximstats: added -xls and the ability to specify output files
3729 (patch written by Frank Heydlauf).
3731 SC/02 Eximstats: use FileHandles for outputting results.
3733 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3735 SC/04 Eximstats: fixed display of large numbers with -nvr option
3737 SC/05 Eximstats: fixed merging of reports with empty tables.
3739 SC/06 Eximstats: added the -include_original_destination flag
3741 SC/07 Eximstats: removed tabs and trailing whitespace.
3743 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3745 TK/06 MBOX spool code: Add real "From " MBOX separator line
3746 so the .eml file is really in mbox format (even though
3747 most programs do not really care). Patch from Alex Miller.
3749 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3750 The latter is generated from $received_to and is only set if the
3751 message has one envelope recipient. SA can use these headers,
3752 obviously out-of-the-box. Patch from Alex Miller.
3754 PH/08 The ${def test on a variable was returning false if the variable's
3755 value was "0", contrary to what the specification has always said!
3756 The result should be true unless the variable is empty.
3758 PH/09 The syntax error of a character other than { following "${if
3759 def:variable_name" (after optional whitespace) was not being diagnosed.
3760 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3761 accidental colon was present, for example, could give incorrect results.
3763 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3764 result is used (not including appendfile, where other changes are about
3767 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3768 This involved changing a lot of size variables from int to off_t. It
3769 should work with maildirs and everything.
3771 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3772 spamd dying while we are connected to it.
3774 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3777 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3778 function for BDB 4.3.
3780 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3782 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3783 the sources for PCRE have been re-arranged and more files are now
3786 PH/15 The code I had for printing potentially long long variables in PH/11
3787 above was not the best (it lost precision). The length of off_t variables
3788 is now inspected at build time, and an appropriate printing format (%ld
3789 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3790 to be "long long int" or "long int". This is needed for the internal
3791 formatting function string_vformat().
3793 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3794 the configuration file to be ":syslog", then the script "guesses" where
3795 the logs files are, rather than using the compiled in default. In our
3796 case the guess is not the same as the compiled default, so the script
3797 suddenly stopped working when I started to use syslog. The patch checks
3798 to see if log_file_path is "". If so, it attempts to read it from exim
3799 with no configuration file to get the compiled in version, before it
3800 falls back to the previous guessing code."
3802 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3803 implementing BATV in an Exim configuration. See NewStuff for the gory
3806 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3807 Makefile that are specific to HP-UX.
3809 PH/18 If the "use_postmaster" option was set for a recipient callout together
3810 with the "random" option, the postmaster address was used as the MAIL
3811 FROM address for the random test, but not for the subsequent recipient
3812 test. It is now used for both.
3814 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3815 patch removes a few documentation additions to RFC 3028, because the
3816 latest draft now contains them. It adds the new en;ascii-case comparator
3817 and a new error check for 8bit text in MIME parts. Comparator and
3818 require names are now matched exactly. I enabled the subaddress
3819 extension, but it is not well tested yet (read: it works for me)."
3821 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3822 rework some of the code of TK/09 above to avoid the hardwired use of
3823 "%lld" and "long long". Replaced the call to snprintf() with a call to
3826 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3827 records point to non-existent hosts", "retry timeout exceeded", and
3828 "retry time not reached for any host after a long failure period".
3830 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3831 experimental DomainKeys support:
3833 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3834 (2) On an error such as an illegally used "control", the wrong name for
3835 the control was given.
3837 These problems did NOT occur unless DomainKeys support was compiled.
3839 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3841 PH/24 Added ${if match_ip condition.
3843 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3844 databases so that it will be absolutely obvious if a crash occurs in the
3845 DB library. This is a regular occurrence (often caused by mis-matched
3848 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3849 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3850 picked up on a user's system that detects such things. There doesn't seem
3851 to be a gcc warning option for this - only an attribute that has to be
3852 put on the function's prototype. It seems that in Fedora Core 4 they have
3853 set this on a number of new functions. No doubt there will be more in due
3856 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3857 specify a transport. However, if an address that was verified by such a
3858 router was the subject of a callout, Exim crashed because it tried to
3859 read the rcpt_include_affixes from the non-existent transport. Now it
3860 just assumes that the setting of that option is false. This bug was
3861 introduced by 4.51/PH/31.
3863 PH/28 Changed -d+all to exclude +memory, because that information is very
3864 rarely of interest, but it makes the output a lot bigger. People tend to
3865 do -d+all out of habit.
3867 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3868 code in os-type was giving problems when libc.so lives in lib64, like on
3871 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3872 aren't the modern standard, and it seems that some systems' include files
3873 don't always have them. Exim was already checking for some of the newer
3874 ones like T_AAAA, and defining it itself. I've added checks for all the
3875 record types that Exim uses.
3877 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3878 not automatically generating a new one, as it is supposed to. This
3879 prevented TLS from working. If the file did exist, but contained invalid
3880 data, a new version was generated, as expected. It was only the case of a
3881 non-existent file that was broken.
3883 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3884 with a change in libdomainkeys > 0.64.
3886 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3887 from DNS. If the selector record carries the flag, it now has
3888 precedence over the domain-wide flag.
3890 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3892 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3893 the use of a port name that isn't defined in /etc/services) occurred, the
3894 message was deferred as in a normal delivery, and thus remained on the
3895 spool, instead of being failed because of the mua_wrapper setting. This
3896 is now fixed, and I tidied up some of the mua_wrapper messages at the
3899 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3900 the messages in a hash of arrays rather than using individual hashes.
3901 This is a bit cleaner and results in dramatic memory savings, albeit
3902 at a slight CPU cost.
3904 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3905 as requested by Marc Sherman.
3907 SC/10 Eximstats: added histograms for user specified patterns as requested
3910 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3912 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3913 fopen() in the content-scanning modules that did not already have it.
3919 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3920 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3922 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3924 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3926 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3927 to test Sieve filters that use "vacation".
3929 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3930 that changes the way the GnuTLS parameters are stored in the cache file.
3931 The new format can be generated externally. For backward compatibility,
3932 if the data in the cache doesn't make sense, Exim assumes it has read an
3933 old-format file, and it generates new data and writes a new file. This
3934 means that you can't go back to an older release without removing the
3937 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3938 work if there are any delivery delays because "one_time" forces the
3939 parent to be marked "delivered", so its unseen clone is never tried
3940 again. For this reason, Exim now forbids the simultaneous setting of
3943 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3944 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3945 entry if you want to know the details. The fix, however, neglected to
3946 consider the case when local delivery batching is involved. The test for
3947 "previously delivered" was not happening when checking to see if an
3948 address could be batched with a previous (undelivered) one; under
3949 certain circumstances this could lead to multiple deliveries to the same
3952 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3953 in its include files, and this causes problems building Exim.
3955 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3956 header_syntax) but Exim was just ignoring anything given after a slash.
3957 In particular, this caused confusion with an attempt to use "verify =
3958 reverse_host_lookup/defer_ok". An error is now given when options are
3959 supplied for verify items that do not have them. (Maybe reverse_host_
3960 lookup should have a defer_ok option, but that's a different point.)
3962 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3963 defined by RFC 821) to 2048, because there were problems with some AUTH
3964 commands, and RFC 1869 says the size should be increased for extended
3965 SMTP commands that take arguments.
3967 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3970 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3971 "unknown" error; now it says that the functionality isn't in the binary.
3973 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3974 an address' error message when a string expansion fails (syntax or
3975 whatever). Otherwise the password may appear in the log. Following change
3976 PH/42 below, there is no longer a chance of it appearing in a bounce
3979 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3981 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3982 of its addresses was ever tried. (Bugzilla bug #2.)
3984 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3985 the result incorrectly in the debug output. (It correctly added a newline
3986 to what was transported.)
3988 TF/01 Added $received_time.
3990 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3991 commented out examples of how to interface to a virus scanner and to
3992 SpamAssassin. Also added commented examples of av_scanner and
3993 spamd_address settings.
3995 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3996 and controls are allowed in which ACLs. There were a couple of minor
3997 errors. Some of the entries in the conditions table (which is a table of
3998 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3999 negation of where the condition IS allowed.
4001 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4003 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4004 header file does not have a version number, so I've had to invent a new
4005 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4006 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4007 radiusclient), but it was contributed by a Radius user.
4009 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4010 files or directories, for OpenSSL.
4012 PH/19 When an Exim process that is running as root has to create an Exim log
4013 file, it does so in a subprocess that runs as exim:exim so as to get the
4014 ownership right at creation (otherwise, other Exim processes might see
4015 the file with the wrong ownership). There was no test for failure of this
4016 fork() call, which would lead to the process getting stuck as it waited
4017 for a non-existent subprocess. Forks do occasionally fail when resources
4018 run out. I reviewed all the other calls to fork(); they all seem to check
4021 PH/20 When checking for unexpected SMTP input at connect time (before writing
4022 the banner), Exim was not dealing correctly with a non-positive return
4023 from the read() function. If the client had disconnected by this time,
4024 the result was a log entry for a synchronization error with an empty
4025 string after "input=" when read() returned zero. If read() returned -1
4026 (an event I could not check), uninitialized data bytes were printed.
4027 There were reports of junk text (parts of files, etc) appearing after
4030 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4032 PH/22 Added support for macro redefinition, and (re)definition in between
4033 driver and ACL definitions.
4035 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4036 forgetting to use the resulting value; it was using the unexpanded value.
4038 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4039 hadn't been configured. The fix is from Juergen Kreileder, who
4040 understands it better than I do:
4042 "Here's what I see happening with three configured cyrus_sasl
4043 authenticators configured (plain, login, cram-md5):
4045 On startup auth_cyrus_sasl_init() gets called for each of these.
4046 This means three calls to sasl_listmech() without a specified mech_list.
4047 => SASL tests which mechs of all available mechs actually work
4048 => three warnings about OTP not working
4049 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4051 With the patch, sasl_listmech() also gets called three times. But now
4052 SASL's mech_list option is set to the server_mech specified in the the
4053 authenticator. Or in other words, the answer from sasl_listmech()
4054 gets limited to just the mech you're testing for (which is different
4056 => the return list contains just 'plain' or 'login', 'cram-md5' or
4057 nothing depending on the value of ob->server_mech.
4059 I've just tested the patch: Authentication still works fine,
4060 unavailable mechs specified in the exim configuration are still
4061 caught, and the auth.log warnings about OTP are gone."
4063 PH/25 When debugging is enabled, the contents of the command line are added
4064 to the debugging output, even when log_selector=+arguments is not
4067 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4068 answer is "GNU", and only if the return is "GNU/something" is the answer
4071 PH/27 $acl_verify_message is now set immediately after the failure of a
4072 verification in an ACL, and so is available in subsequent modifiers. In
4073 particular, the message can be preserved by coding like this:
4075 warn !verify = sender
4076 set acl_m0 = $acl_verify_message
4078 Previously, $acl_verify_message was set only while expanding "message"
4079 and "log_message" when a very denied access.
4081 PH/28 Modified OS/os.c-Linux with
4083 -#ifndef OS_LOAD_AVERAGE
4084 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4086 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4087 nomenclature these days.)
4089 PH/29 Installed patch from the Sieve maintainer that adds the options
4090 sieve_useraddress and sieve_subaddress to the redirect router.
4092 PH/30 In these circumstances:
4093 . Two addresses routed to the same list of hosts;
4094 . First host does not offer TLS;
4095 . First host accepts first address;
4096 . First host gives temporary error to second address;
4097 . Second host offers TLS and a TLS session is established;
4098 . Second host accepts second address.
4099 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4100 and peerdn, if requested) that were in fact used only for the second
4103 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4104 attention to any local part prefix or suffix that was matched by the
4105 router that accepted the address. It now behaves in the same way as it
4106 does for delivery: the affixes are removed from the local part unless
4107 rcpt_include_affixes is set on the transport.
4109 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4110 timeout during the DATA phase of an incoming message.
4112 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4113 applied a patch sanctioned by the Sieve maintainer.
4115 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4116 the uid or gid is negative. A case of a negative gid caused this to be
4117 noticed. The fix allows for either to be negative.
4119 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4120 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4123 PH/36 The change PH/12 above was broken. Fixed it.
4125 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4126 the grounds that routing the same address twice would always produce the
4127 same answer. This might have been true once, but it is certainly no
4128 longer true now. Routing a child address may depend on the previous
4129 routing that produced that child. Some complicated redirection strategies
4130 went wrong when messages had multiple recipients, and made Exim's
4131 behaviour dependent on the order in which the addresses were given.
4133 I have moved the duplicate checking until after the routing is complete.
4134 Exim scans the addresses that are assigned to local and remote
4135 transports, and removes any duplicates. This means that more work will be
4136 done, as duplicates will always all be routed, but duplicates are
4137 presumably rare, so I don't expect this is of any significance.
4139 For deliveries to pipes, files, and autoreplies, the duplicate checking
4140 still happens during the routing process, since they are not going to be
4143 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4144 It corrects a timeout issue with spamd. This is Ian's comment: "The
4145 background is that sometimes spamd either never reads data from a
4146 connection it has accepted, or it never writes response data. The exiscan
4147 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4148 blindly assumes that writes won't block so it may never time out."
4150 PH/39 Allow G after quota size as well as K and M.
4152 PH/40 The value set for $authenticated_id in an authenticator may not contain
4153 binary zeroes or newlines because the value is written to log lines and
4154 to spool files. There was no check on this. Now the value is run through
4155 the string_printing() function so that such characters are converted to
4156 printable escape sequences.
4158 PH/41 $message_linecount is a new variable that contains the total number of
4159 lines in the message. Compare $body_linecount, which is the count for the
4162 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4163 bounce and delay warning messages, except in certain special cases, which
4166 (a) An SMTP error message from a remote host;
4167 (b) A message specified in a :fail: redirection;
4168 (c) A message specified in a "fail" command in a system filter;
4169 (d) A message specified in a FAIL return from the queryprogram router;
4170 (e) A message specified by the cannot_route_message router option.
4172 In these cases only, Exim does include the error details in bounce and
4173 warning messages. There are also a few cases where bland messages such
4174 as "unrouteable address" or "local delivery error" are given.
4176 PH/43 $value is now also set for the "else" part of a ${run expansion.
4178 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4179 being worked on, but at least Exim now implements the latest version to
4182 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4183 process to complete was treated as a delivery failure, a timeout while
4184 writing the message to the pipe was logged, but erroneously treated as a
4185 successful delivery. Such timeouts include transport filter timeouts. For
4186 consistency with the overall process timeout, these timeouts are now
4187 treated as errors, giving rise to delivery failures by default. However,
4188 there is now a new Boolean option for the pipe transport called
4189 timeout_defer, which, if set TRUE, converts the failures into defers for
4190 both kinds of timeout. A transport filter timeout is now identified in
4193 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4194 systems where "make" and "gmake" are different, calling "gmake" at top
4195 level broke things. I've arranged for the value of $(MAKE) to be passed
4196 from the Makefile to this script so that it can call the same version of
4200 A note about Exim versions 4.44 and 4.50
4201 ----------------------------------------
4203 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4204 changes of various kinds. As a consequence, a big documentation update was
4205 needed. This delayed the release for rather longer than seemed good, especially
4206 in the light of a couple of (minor) security issues. Therefore, the changes
4207 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4208 release. So 4.44 and 4.50 are in effect two different branches that both start
4211 I have left the 4.50 change log unchanged; it contains all the changes since
4212 4.43. The change log for 4.44 is below; many of its items are identical to
4213 those for 4.50. This seems to be the most sensible way to preserve the
4214 historical information.
4220 1. Minor wording change to the doc/README.SIEVE file.
4222 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4223 computation of the current number of files was incorrect.
4225 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4226 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4229 4. Give more explanation in the error message when the command for a transport
4230 filter fails to execute.
4232 5. There are several places where Exim runs a non-Exim command in a
4233 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4234 was being done only for the command run by the queryprogram router. It is
4235 now done for all such subprocesses. The other cases are: ${run, transport
4236 filters, and the commands run by the lmtp and pipe transports.
4238 6. Added CONFIGURE_GROUP build-time option.
4240 7. Some older OS have a limit of 256 on the maximum number of file
4241 descriptors. Exim was using setrlimit() to set 1000 as a large value
4242 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4243 systems. I've change it so that if it can't get 1000, it tries for 256.
4245 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4246 was an oversight, and furthermore, ever since the addition of extra
4247 controls (e.g. 4.43/32), the checks on when to allow different forms of
4248 "control" were broken. There should now be diagnostics for all cases when a
4249 control that does not make sense is encountered.
4251 9. Added the /retain_sender option to "control=submission".
4253 10. $recipients is now available in the predata ACL (oversight).
4255 11. Tidy the search cache before the fork to do a delivery from a message
4256 received from the command line. Otherwise the child will trigger a lookup
4257 failure and thereby defer the delivery if it tries to use (for example) a
4258 cached ldap connection that the parent has called unbind on.
4260 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4261 of $address_data from the recipient verification was clobbered by the
4262 sender verification.
4264 13. The value of address_data from a sender verification is now available in
4265 $sender_address_data in subsequent conditions in the ACL statement.
4267 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4269 15. Added a new option "connect=<time>" to callout options, to set a different
4272 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4273 was its contents. (It was OK if the option was not defined at all.)
4275 17. A "Completed" log line is now written for messages that are removed from
4276 the spool by the -Mrm option.
4278 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4279 information about exactly what failed.
4281 19. Added -dd to debug only the daemon process.
4283 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4284 handles timeouts, both on the server side and network timeouts. Renamed the
4285 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4287 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4288 It is now set to "smtps".
4290 22. $host_address is now set to the target address during the checking of
4291 ignore_target_hosts.
4293 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4294 being passed; this would have caused $sender_host_name to have been used if
4295 matching the list had actually called for a host name (not very likely,
4296 since this list is usually IP addresses). A host name is now passed as
4299 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4300 code that specifies a non-restarting handler (typically sigaction() in
4301 modern systems) in an attempt to fix a rare and obscure crash bug.
4303 25. Narrowed the window for a race in the daemon that could cause it to ignore
4304 SIGCHLD signals. This is not a major problem, because they are used only to
4305 wake it up if nothing else does.
4307 26. A malformed maildirsize file could cause Exim to calculate negative values
4308 for the mailbox size or file count. Odd effects could occur as a result.
4309 The maildirsize information is now recalculated if the size or filecount
4312 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4313 support for a long time. Removed HAVE_SYS_VFS_H.
4315 28. Installed the latest version of exipick from John Jetmore.
4317 29. In an address list, if the pattern was not a regular expression, an empty
4318 subject address (from a bounce message) matched only if the pattern was an
4319 empty string. Non-empty patterns were not even tested. This was the wrong
4320 because it is perfectly reasonable to use an empty address as part of a
4321 database query. An empty address is now tested by patterns that are
4322 lookups. However, all the other forms of pattern expect the subject to
4323 contain a local part and a domain, and therefore, for them, an empty
4324 address still always fails if the pattern is not itself empty.
4326 30. Exim went into a mad DNS loop when attempting to do a callout where the
4327 host was specified on an smtp transport, and looking it up yielded more
4328 than one IP address.
4330 31. Re-factored the code for checking spool and log partition space into a
4331 function that finds that data and another that does the check. The former
4332 is then used to implement four new variables: $spool_space, $log_space,
4333 $spool_inodes, and $log_inodes.
4335 32. The RFC2047 encoding function was originally intended for short strings
4336 such as real names; it was not keeping to the 75-character limit for
4337 encoded words that the RFC imposes. It now respects the limit, and
4338 generates multiple encoded words if necessary. To be on the safe side, I
4339 have increased the buffer size for the ${rfc2047: expansion operator from
4342 33. It is now permitted to omit both strings after an "if" condition; if the
4343 condition is true, the result is "true". As before, when the second string
4344 is omitted, a false condition yields an empty string. This makes it less
4345 cumbersome to write custom ACL and router conditions.
4347 34. Failure to deliver a bounce message always caused it to be frozen, even if
4348 there was an errors_to setting on the router. The errors_to setting is now
4351 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4352 canonical form (fully expanded) before being placed in
4353 $sender_host_address.
4355 36. The table in the code that translates DNS record types into text (T_A to
4356 "A" for instance) was missing entries for NS and CNAME. It is just possible
4357 that this could have caused confusion if both these types were looked up
4358 for the same domain, because the text type is used as part of Exim's
4359 per-process caching. But the chance of anyone hitting this buglet seems
4362 37. The dnsdb lookup has been extended in a number of ways.
4364 (1) There is a new type, "zns", which walks up the domain tree until it
4365 finds some nameserver records. It should be used with care.
4367 (2) There is a new type, "mxh", which is like "mx" except that it returns
4368 just the host names, not the priorities.
4370 (3) It is now possible to give a list of domains (or IP addresses) to be
4371 looked up. The behaviour when one of the lookups defers can be
4372 controlled by a keyword.
4374 (4) It is now possible to specify the separator character for use when
4375 multiple records are returned.
4377 38. The dnslists ACL condition has been extended: it is now possible to supply
4378 a list of IP addresses and/or domains to be looked up in a particular DNS
4381 39. Added log_selector=+queue_time_overall.
4383 40. When running the queue in the test harness, wait just a tad after forking a
4384 delivery process, to get repeatability of debugging output.
4386 41. Include certificate and key file names in error message when GnuTLS fails
4387 to set them up, because the GnuTLS error message doesn't include the name
4388 of the failing file when there is a problem reading it.
4390 42. Allow both -bf and -bF in the same test run.
4392 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4394 44. The "Exiscan patch" is now merged into the mainline Exim source.
4396 45. Sometimes the final signoff response after QUIT could fail to get
4397 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4398 < 0 before doing a fflush(). This bug looks as though it goes back to the
4399 introduction of TLS in release 3.20, but "sometimes" must have been rare
4400 because the tests only now provoked it.
4402 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4403 (this can affect the format of dates).
4405 47. exim_tidydb, when checking for the continued existence of a message for
4406 which it has found a message-specific retry record, was not finding
4407 messages that were in split spool directories. Consequently, it was
4408 deleting retry records that should have stayed in existence.
4410 48. Steve fixed some bugs in eximstats.
4412 49. The SPA authentication driver was not abandoning authentication and moving
4413 on to the next authenticator when an expansion was forced to fail,
4414 contradicting the general specification for all authenticators. Instead it
4415 was generating a temporary error. It now behaves as specified.
4417 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4418 (the order specifies the preference for clients). The order is now AES256,
4419 AES128, 3DES, ARCFOUR128.
4421 51. Small patch to Sieve code - explicitly set From: when generating an
4424 52. Exim crashed if a remote delivery caused a very long error message to be
4425 recorded - for instance if somebody sent an entire SpamAssassin report back
4426 as a large number of 550 error lines. This bug was coincidentally fixed by
4427 increasing the size of one of Exim's internal buffers (big_buffer) that
4428 happened as part of the Exiscan merge. However, to be on the safe side, I
4429 have made the code more robust (and fixed the comments that describe what
4432 53. Now that there can be additional text after "Completed" in log lines (if
4433 the queue_time_overall log selector is set), a one-byte patch to exigrep
4434 was needed to allow it to recognize "Completed" as not the last thing in
4437 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4438 patch that reportedly fixes this has been added. I am not expert enough to
4439 create a test for it. This is what the patch creator wrote:
4441 "I found a little strange behaviour of ldap code when working with
4442 Windows 2003 AD Domain, where users was placed in more than one
4443 Organization Units. When I tried to give exim partial DN, the exit code
4444 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4445 But simultaneously result of request was absolutely normal ldap result,
4446 so I produce this patch..."
4448 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4449 REFERENCE, so I have modified the code to exclude the patch when that macro
4452 55. Some experimental protocols are using DNS PTR records for new purposes. The
4453 keys for these records are domain names, not reversed IP addresses. The
4454 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4455 leaves it alone. Component reversal etc. now happens only for IP addresses.
4458 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4460 57. Double the size of the debug message buffer (to 2048) so that more of very
4461 long debug lines gets shown.
4463 58. The exicyclog utility now does better if the number of log files to keep
4464 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4466 59. Two changes related to the smtp_active_hostname option:
4468 (1) $smtp_active_hostname is now available as a variable.
4469 (2) The default for smtp_banner uses $smtp_active_hostname instead
4470 of $primary_hostname.
4472 60. The host_aton() function is supposed to be passed a string that is known
4473 to be a valid IP address. However, in the case of IPv6 addresses, it was
4474 not checking this. This is a hostage to fortune. Exim now panics and dies
4475 if the condition is not met. A case was found where this could be provoked
4476 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4477 components; fortuitously, this particular loophole had already been fixed
4478 by change 4.50/55 above.
4480 If there are any other similar loopholes, the new check in host_aton()
4481 itself should stop them being exploited. The report I received stated that
4482 data on the command line could provoke the exploit when Exim was running as
4483 exim, but did not say which command line option was involved. All I could
4484 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4485 running as the user.
4488 61. There was a buffer overflow vulnerability in the SPA authentication code
4489 (which came originally from the Samba project). I have added a test to the
4490 spa_base64_to_bits() function which I hope fixes it.
4493 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4494 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4496 63. The daemon start-up calls getloadavg() while still root for those OS that
4497 need the first call to be done as root, but it missed one case: when
4498 deliver_queue_load_max is set with deliver_drop_privilege. This is
4499 necessary for the benefit of the queue runner, because there is no re-exec
4500 when deliver_drop_privilege is set.
4502 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4503 This has been fixed.
4505 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4506 was in use, was not putting the data itself into the right store pool;
4507 consequently, it could be overwritten for a subsequent message in the same
4508 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4511 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4513 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4514 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4515 the function were treating the return as a boolean value, which happened to
4516 work because 0=false and not-0=true, but is not correct code.
4518 68. The host_aton() function was not handling scoped IPv6 addresses (those
4519 with, for example, "%eth0" on the end) correctly.
4521 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4522 negated items (that is, ~something) in unsigned ints. Some compilers
4523 apparently mutter when there is no cast.
4525 70. If an address verification called from an ACL failed, and did not produce a
4526 user-specific message (i.e. there was only a "system" message), nothing was
4527 put in $acl_verify_message. In this situation, it now puts the system
4530 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4531 session; change 4.31/43 added the unwanted input to the log line - except
4532 that it did not do this in the start of session case. It now does.
4534 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4535 This is wrong and can cause the other end to generate a synchronization
4536 error if it is another Exim or anything else that does the synchronization
4537 check. A QUIT command is no longer sent after a timeout.
4539 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4540 during host lookups.
4542 74. The defer_ok option of callout verification was not working if it was used
4543 when verifying addresses in header lines, that is, for this case:
4545 verify = header_sender/callout=defer_ok
4547 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4548 those file descriptors could be used for SMTP connections. If anything
4549 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4550 could be sent to the SMTP client, causing chaos. The daemon now opens
4551 stdin, stdout, and stderr to /dev/null when it puts itself into the
4554 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4555 log by default. The user can override this with suitable Perl magic.
4557 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4558 the log message when discard triggers, was not working for the DATA ACL or
4559 for the non-SMTP ACL.
4561 78. Error message wording change in sieve.c.
4563 79. If smtp_accept_max_per_host was set, the number of connections could be
4564 restricted to fewer than expected, because the daemon was trying to set up
4565 a new connection before checking whether the processes handling previous
4566 connections had finished. The check for completed processes is now done
4567 earlier. On busy systems, this bug wouldn't be noticed because something
4568 else would have woken the daemon, and it would have reaped the completed
4571 80. If a message was submitted locally by a user whose login name contained one
4572 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4573 It caused a spool format error. I have fixed the spool reading code. A
4574 related problem was that the "from" clause in the Received: line became
4575 illegal because of the space(s). It is now covered by ${quote_local_part.
4577 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4580 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4582 83. Patch from Sieve maintainer to fix unterminated string problem in
4583 "vacation" handling.
4585 84. Some minor changes to the Linux configuration files to help with other
4586 OS variants using glibc.
4588 85. One more patch for Sieve to update vacation handling to latest spec.
4591 ----------------------------------------------------
4592 See the note above about the 4.44 and 4.50 releases.
4593 ----------------------------------------------------
4599 1. Change 4.43/35 introduced a bug that caused file counts to be
4600 incorrectly computed when quota_filecount was set in an appendfile
4603 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4604 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4607 3. Give more explanation in the error message when the command for a transport
4608 filter fails to execute.
4610 4. There are several places where Exim runs a non-Exim command in a
4611 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4612 was being done only for the command run by the queryprogram router. It is
4613 now done for all such subprocesses. The other cases are: ${run, transport
4614 filters, and the commands run by the lmtp and pipe transports.
4616 5. Some older OS have a limit of 256 on the maximum number of file
4617 descriptors. Exim was using setrlimit() to set 1000 as a large value
4618 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4619 systems. I've change it so that if it can't get 1000, it tries for 256.
4621 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4622 was an oversight, and furthermore, ever since the addition of extra
4623 controls (e.g. 4.43/32), the checks on when to allow different forms of
4624 "control" were broken. There should now be diagnostics for all cases when a
4625 control that does not make sense is encountered.
4627 7. $recipients is now available in the predata ACL (oversight).
4629 8. Tidy the search cache before the fork to do a delivery from a message
4630 received from the command line. Otherwise the child will trigger a lookup
4631 failure and thereby defer the delivery if it tries to use (for example) a
4632 cached ldap connection that the parent has called unbind on.
4634 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4635 of $address_data from the recipient verification was clobbered by the
4636 sender verification.
4638 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4639 was its contents. (It was OK if the option was not defined at all.)
4641 11. A "Completed" log line is now written for messages that are removed from
4642 the spool by the -Mrm option.
4644 12. $host_address is now set to the target address during the checking of
4645 ignore_target_hosts.
4647 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4648 being passed; this would have caused $sender_host_name to have been used if
4649 matching the list had actually called for a host name (not very likely,
4650 since this list is usually IP addresses). A host name is now passed as
4653 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4654 code that specifies a non-restarting handler (typically sigaction() in
4655 modern systems) in an attempt to fix a rare and obscure crash bug.
4657 15. Narrowed the window for a race in the daemon that could cause it to ignore
4658 SIGCHLD signals. This is not a major problem, because they are used only to
4659 wake it up if nothing else does.
4661 16. A malformed maildirsize file could cause Exim to calculate negative values
4662 for the mailbox size or file count. Odd effects could occur as a result.
4663 The maildirsize information is now recalculated if the size or filecount
4666 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4667 support for a long time. Removed HAVE_SYS_VFS_H.
4669 18. Updated exipick to current release from John Jetmore.
4671 19. Allow an empty sender to be matched against a lookup in an address list.
4672 Previously the only cases considered were a regular expression, or an
4675 20. Exim went into a mad DNS lookup loop when doing a callout where the
4676 host was specified on the transport, if the DNS lookup yielded more than
4679 21. The RFC2047 encoding function was originally intended for short strings
4680 such as real names; it was not keeping to the 75-character limit for
4681 encoded words that the RFC imposes. It now respects the limit, and
4682 generates multiple encoded words if necessary. To be on the safe side, I
4683 have increased the buffer size for the ${rfc2047: expansion operator from
4686 22. Failure to deliver a bounce message always caused it to be frozen, even if
4687 there was an errors_to setting on the router. The errors_to setting is now
4690 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4691 canonical form (fully expanded) before being placed in
4692 $sender_host_address.
4694 24. Updated eximstats to version 1.33
4696 25. Include certificate and key file names in error message when GnuTLS fails
4697 to set them up, because the GnuTLS error message doesn't include the name
4698 of the failing file when there is a problem reading it.
4700 26. Expand error message when OpenSSL has problems setting up cert/key files.
4703 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4704 (this can affect the format of dates).
4706 28. exim_tidydb, when checking for the continued existence of a message for
4707 which it has found a message-specific retry record, was not finding
4708 messages that were in split spool directories. Consequently, it was
4709 deleting retry records that should have stayed in existence.
4711 29. eximstats updated to version 1.35
4712 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4713 1.35 - bugfix such that pie charts by volume are generated correctly
4715 30. The SPA authentication driver was not abandoning authentication and moving
4716 on to the next authenticator when an expansion was forced to fail,
4717 contradicting the general specification for all authenticators. Instead it
4718 was generating a temporary error. It now behaves as specified.
4720 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4721 (the order specifies the preference for clients). The order is now AES256,
4722 AES128, 3DES, ARCFOUR128.
4724 31. Small patch to Sieve code - explicitly set From: when generating an
4727 32. Exim crashed if a remote delivery caused a very long error message to be
4728 recorded - for instance if somebody sent an entire SpamAssassin report back
4729 as a large number of 550 error lines. This bug was coincidentally fixed by
4730 increasing the size of one of Exim's internal buffers (big_buffer) that
4731 happened as part of the Exiscan merge. However, to be on the safe side, I
4732 have made the code more robust (and fixed the comments that describe what
4735 33. Some experimental protocols are using DNS PTR records for new purposes. The
4736 keys for these records are domain names, not reversed IP addresses. The
4737 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4738 leaves it alone. Component reversal etc. now happens only for IP addresses.
4741 34. The host_aton() function is supposed to be passed a string that is known
4742 to be a valid IP address. However, in the case of IPv6 addresses, it was
4743 not checking this. This is a hostage to fortune. Exim now panics and dies
4744 if the condition is not met. A case was found where this could be provoked
4745 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4746 components; fortuitously, this particular loophole had already been fixed
4747 by change 4.50/55 or 4.44/33 above.
4749 If there are any other similar loopholes, the new check in host_aton()
4750 itself should stop them being exploited. The report I received stated that
4751 data on the command line could provoke the exploit when Exim was running as
4752 exim, but did not say which command line option was involved. All I could
4753 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4754 running as the user.
4757 35. There was a buffer overflow vulnerability in the SPA authentication code
4758 (which came originally from the Samba project). I have added a test to the
4759 spa_base64_to_bits() function which I hope fixes it.
4762 36. The daemon start-up calls getloadavg() while still root for those OS that
4763 need the first call to be done as root, but it missed one case: when
4764 deliver_queue_load_max is set with deliver_drop_privilege. This is
4765 necessary for the benefit of the queue runner, because there is no re-exec
4766 when deliver_drop_privilege is set.
4768 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4769 was in use, was not putting the data itself into the right store pool;
4770 consequently, it could be overwritten for a subsequent message in the same
4771 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4774 38. Sometimes the final signoff response after QUIT could fail to get
4775 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4776 < 0 before doing a fflush(). This bug looks as though it goes back to the
4777 introduction of TLS in release 3.20, but "sometimes" must have been rare
4778 because the tests only now provoked it.
4784 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4785 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4786 Now it returns an integer. A number of calls were still expecting a T/F
4787 return. Fortuitously, in all cases, the tests worked in OK situations,
4788 which is the norm. However, things would have gone wrong on any write
4789 failures on the smtp file descriptor. This function is used when sending
4790 messages over SMTP and also when doing verify callouts.
4792 2. When Exim is called to do synchronous delivery of a locally submitted
4793 message (the -odf or -odi options), it no longer closes stderr before doing
4796 3. Implemented the mua_wrapper option.
4798 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4800 5. Implemented the functions header_remove(), header_testname(),
4801 header_add_at_position(), and receive_remove_recipient(), and exported them
4804 6. If an ACL "warn" statement specified the addition of headers, Exim already
4805 inserted X-ACL-Warn: at the start if there was no header name. However, it
4806 was not making this test for the second and subsequent header lines if
4807 there were newlines in the string. This meant that an invalid header could
4808 be inserted if Exim was badly configured.
4810 7. Allow an ACL "warn" statement to add header lines at the start or after all
4811 the Received: headers, as well as at the end.
4813 8. Added the rcpt_4xx retry error code.
4815 9. Added postmaster_mailfrom=xxx to callout verification option.
4817 10. Added mailfrom=xxxx to the callout verification option, for verify=
4820 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4821 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4823 12. Inserted some casts to stop certain compilers warning when using pointer
4824 differences as field lengths or precisions in printf-type calls (mostly
4825 affecting debugging statements).
4827 13. Added optional readline() support for -be (dynamically loaded).
4829 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4830 same clock tick as a message's arrival, so that its received time was the
4831 same as the "first fail" time on the retry record, and that message
4832 remained on the queue past the ultimate address timeout, every queue runner
4833 would try a delivery (because it was past the ultimate address timeout) but
4834 after another failure, the ultimate address timeout, which should have then
4835 bounced the address, did not kick in. This was a "< instead of <=" error;
4836 in most cases the first failure would have been in the next clock tick
4837 after the received time, and all would be well.
4839 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4840 being recognized when the domain list was tested by the match_domain
4841 condition in an expansion string.
4843 16. Added the ${str2b64: operator.
4845 17. Exim was always calling setrlimit() to set a large limit for the number of
4846 processes, without checking whether the existing limit was already
4847 adequate. (It did check for the limit on file descriptors.) Furthermore,
4848 errors from getrlimit() and setrlimit() were being ignored. Now they are
4849 logged to the main and panic logs, but Exim does carry on, to try to do its
4850 job under whatever limits there are.
4852 18. Imported PCRE 5.0.
4854 19. Trivial typo in log message " temporarily refused connection" (the leading
4857 20. If the log selector return_path_on_delivery was set and an address was
4858 redirected to /dev/null, the delivery process crashed because it assumed
4859 that a return path would always be set for a "successful" delivery. In this
4860 case, the whole delivery is bypassed as an optimization, and therefore no
4863 21. Internal re-arrangement: the function for sending a challenge and reading
4864 a response while authentication was assuming a zero-terminated challenge
4865 string. It's now changed to take a pointer and a length, to allow for
4866 binary data in such strings.
4868 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4870 23. Exim was not respecting finduser_retries when seeking the login of the
4871 uid under which it was called; it was always trying 10 times. (The default
4872 setting of finduser_retries is zero.) Also, it was sleeping after the final
4873 failure, which is pointless.
4875 24. Implemented tls_on_connect_ports.
4877 25. Implemented acl_smtp_predata.
4879 26. If the domain in control=submission is set empty, Exim assumes that the
4880 authenticated id is a complete email address when it generates From: or
4881 Sender: header lines.
4883 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4884 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4885 chown and chgrp in /bin and hostname in /usr/bin.
4887 28. Exim was keeping the "process log" file open after each use, just as it
4888 does for the main log. This opens the possibility of it remaining open for
4889 long periods when the USR1 signal hits a daemon. Occasional processlog
4890 errors were reported, that could have been caused by this. Anyway, it seems
4891 much more sensible not to leave this file open at all, so that is what now
4894 29. The long-running daemon process does not normally write to the log once it
4895 has entered its main loop, and it closes the log before doing so. This is
4896 so that log files can straightforwardly be renamed and moved. However,
4897 there are a couple of unusual error situations where the daemon does write
4898 log entries, and I had neglected to close the log afterwards.
4900 30. The text of an SMTP error response that was received during a remote
4901 delivery was being truncated at 512 bytes. This is too short for some of
4902 the long messages that one sometimes sees. I've increased the limit to
4905 31. It is now possible to make retry rules that apply only when a message has a
4906 specific sender, in particular, an empty sender.
4908 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4909 it possible to be selective about when SMTP synchronization is enforced.
4911 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4913 32. Implemented hosts_connection_nolog.
4915 33. Added an ACL for QUIT.
4917 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4920 35. Added mailbox_size and mailbox_filecount to appendfile.
4922 36. Added control = no_multiline_responses to ACLs.
4924 37. There was a bug in the logic of the code that waits for the clock to tick
4925 in the case where the clock went backwards by a substantial amount such
4926 that the microsecond fraction of "now" was more than the microsecond
4927 fraction of "then" (but the whole seconds number was less).
4929 38. Added support for the libradius Radius client library this is found on
4930 FreeBSD (previously only the radiusclient library was supported).
4936 1. When certain lookups returned multiple values in the form name=value, the
4937 quoting of the values was not always being done properly. Specifically:
4938 (a) If the value started with a double quote, but contained no whitespace,
4940 (b) If the value contained whitespace other than a space character (i.e.
4941 tabs or newlines or carriage returns) it was not quoted.
4942 This fix has been applied to the mysql and pgsql lookups by writing a
4943 separate quoting function and calling it from the lookup code. The fix
4944 should probably also be applied to nisplus, ibase and oracle lookups, but
4945 since I cannot test any of those, I have not disturbed their existing code.
4947 2. A hit in the callout cache for a specific address caused a log line with no
4948 reason for rejecting RCPT. Now it says "Previous (cached) callout
4949 verification failure".
4951 3. There was an off-by-one bug in the queryprogram router. An over-long
4952 return line was truncated at 256 instead of 255 characters, thereby
4953 overflowing its buffer with the terminating zero. As well as fixing this, I
4954 have increased the buffer size to 1024 (and made a note to document this).
4956 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4957 when Exim is waiting for an SMTP response from a remote server, Exim
4958 restarts its select() call on the socket, thereby resetting its timeout.
4959 This is not a problem when such interrupts are rare. Somebody set up a cron
4960 job to run exiwhat every 2 minutes, which is less than the normal select()
4961 timeout (5 or 10 minutes). This meant that the select() timeout never
4962 kicked in because it was always reset. I have fixed this by comparing the
4963 time when an interrupt arrives with the time at the start of the first call
4964 to select(). If more time than the timeout has elapsed, the interrupt is
4965 treated as a timeout.
4967 5. Some internal re-factoring in preparation for the addition of Sieve
4968 extensions (by MH). In particular, the "personal" test is moved to a
4969 separate function, and given an option for scanning Cc: and Bcc: (which is
4970 not set for Exim filters).
4972 6. When Exim created an email address using the login of the caller as the
4973 local part (e.g. when creating a From: or Sender: header line), it was not
4974 quoting the local part when it contained special characters such as @.
4976 7. Installed new OpenBSD configuration files.
4978 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4979 try to make them clearer.
4981 9. Callout options, other than the timeout value, were being ignored when
4982 verifying sender addresses in header lines. For example, when using
4984 verify = header_sender/callout=no_cache
4986 the cache was (incorrectly) being used.
4988 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4989 only the Cygwin environment.
4991 11. When return_path_on_delivery was set as a log selector, if different remote
4992 addresses in the same message used different return paths and parallel
4993 remote delivery occurred, the wrong values would sometimes be logged.
4994 (Whenever a remote delivery process finished, the return path value from
4995 the most recently started remote delivery process was logged.)
4997 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4998 lines when AUTH and/or TLS are in use. This is the "received protocol"
4999 field. Exim used to use "asmtp" for authenticated SMTP, without any
5000 indication (in the protocol name) for TLS use. Now it follows the RFC and
5001 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5002 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5003 names appear in log lines as well as in Received: header lines.
5005 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5006 extensions, and comparison tests, and to fix some bugs.
5008 14. Changes to the "personal" filter test:
5010 (1) The test was buggy in that it was just doing the equivalent of
5011 "contains" tests on header lines. For example, if a user's address was
5012 anne@some.where, the "personal" test would incorrectly be true for
5014 To: susanne@some.where
5016 This test is now done by extracting each address from the header in turn,
5017 and checking the entire address. Other tests that are part of "personal"
5018 are now done using regular expressions (for example, to check local parts
5019 of addresses in From: header lines).
5021 (2) The list of non-personal local parts in From: addresses has been
5022 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5023 taken from the Sieve specification recommendations.
5025 (3) If the message contains any header line starting with "List-" it is
5026 treated as non-personal.
5028 (4) The test for "circular" in the Subject: header line has been removed
5029 because it now seems ill-conceived.
5031 15. Minor typos in src/EDITME comments corrected.
5033 16. Installed latest exipick from John Jetmore.
5035 17. If headers_add on a router specified a text string that was too long for
5036 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5037 of string_sprintf() is now avoided.
5039 18. $message_body_size was not set (it was always zero) when running the DATA
5040 ACL and the local_scan() function.
5042 19. For the "mail" command in an Exim filter, no default was being set for
5043 the once_repeat time, causing a random time value to be used if "once" was
5044 specified. (If the value happened to be <= 0, no repeat happened.) The
5045 default is now 0s, meaning "never repeat". The "vacation" command was OK
5046 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5047 (I found it when inspecting the code).
5049 20. There is now an overall timeout for performing a callout verification. It
5050 defaults to 4 times the callout timeout, which applies to individual SMTP
5051 commands during the callout. The overall timeout applies when there is more
5052 than one host that can be tried. The timeout is checked before trying the
5053 next host. This prevents very long delays if there are a large number of
5054 hosts and all are timing out (e.g. when the network connections are timing
5055 out). The value of the overall timeout can be changed by specifying an
5056 additional sub-option for "callout", called "maxwait". For example:
5058 verify = sender/callout=5s,maxwait=20s
5060 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5061 to the end before writing, but this should make it even safer).
5063 22. Exim was forgetting that it had advertised PIPELINING for the second and
5064 subsequent messages on an SMTP connection. It was also not resetting its
5065 memory on STARTTLS and an internal HELO.
5067 23. When Exim logs an SMTP synchronization error within a session, it now
5068 records whether PIPELINING has been advertised or not.
5070 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5071 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5072 rather than long int.
5074 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5076 26. Added the never_mail option to autoreply.
5082 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5083 crash if the getsockname() call failed; this can happen if a connection is
5084 closed very soon after it is established. The problem was simply in the
5085 order in which certain operations were done, causing Exim to try to write
5086 to the SMTP stream before it had set up the file descriptor. The bug has
5087 been fixed by making things happen in the correct order.
5093 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5094 before the connection was closed, thus losing the rejection response.
5096 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5097 some early Solaris releases, but causes trouble in current releases where
5098 socklen_t is defined.
5100 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5103 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5106 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5107 that releasing the top of it at the end releases what was used for sub-
5108 expansions (unless the block got too big). However, discard this block if
5109 the first thing is a variable or header, so that we can use its block when
5110 it is dynamic (useful for very large $message_headers, for example).
5112 6. Lookups now cache *every* query, not just the most recent. A new, separate
5113 store pool is used for this. It can be recovered when all lookup caches are
5114 flushed. Lookups now release memory at the end of their result strings.
5115 This has involved some general refactoring of the lookup sources.
5117 7. Some code has been added to the store_xxx() functions to reduce the amount
5118 of flapping under certain conditions.
5120 8. log_incoming_interface used to affect only the <= reception log lines. Now
5121 it causes the local interface and port to be added to several more SMTP log
5122 lines, for example "SMTP connection from", and rejection lines.
5124 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5126 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5128 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5129 could be overwritten at the end of the current message (or the start of a
5130 new message if it was set in a HELO ACL). The value is now preserved for
5131 the duration of the SMTP connection.
5133 12. If a transport had a headers_rewrite setting, and a matching header line
5134 contained an unqualified address, that address was qualified, even if it
5135 did not match any rewriting rules. The underlying bug was that the values
5136 of the flags that permit the existence of unqualified sender and recipient
5137 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5138 non-local messages, and by -bnq for local messages) were not being
5139 preserved with the message after it was received.
5141 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5142 "next input=" as part of the text comprising the host identity instead of
5143 the correct text. The code was using the same buffer for two different
5144 strings. However, depending on which order the printing function evaluated
5145 its arguments, the bug did not always show up. Under Linux, for example, my
5146 test suite worked just fine.
5148 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5149 doesn't work with some older versions of Perl. It has been changed to "my",
5150 which in any case is probably the better facility to use.
5152 15. A really picky compiler found some instances of statements for creating
5153 error messages that either had too many or two few arguments for the format
5156 16. The size of the buffer for calls to the DNS resolver has been increased
5157 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5158 for addresses that have a lot of PTR records. This alleviates a problem; it
5159 does not fully solve it.
5161 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5162 buffer now truncates the list and logs the incident, which is the same
5163 action as happens when Exim is looking up a host name and its aliases.
5164 Previously in this situation something unpredictable would happen;
5165 sometimes it was "internal error: store_reset failed".
5167 18. If a server dropped the connection unexpectedly when an Exim client was
5168 using GnuTLS and trying to read a response, the client delivery process
5169 crashed while trying to generate an error log message.
5171 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5172 string, for example:
5174 warn message = H1: something\nH2: something
5176 the text was added as a single header line from Exim's point of view
5177 though it ended up OK in the delivered message. However, searching for the
5178 second and subsequent header lines using $h_h2: did not work. This has been
5179 fixed. Similarly, if a system filter added multiple headers in this way,
5180 the routers could not see them.
5182 20. Expanded the error message when iplsearch is called with an invalid key to
5183 suggest using net-iplsearch in a host list.
5185 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5186 ACLs are no longer actually imposed (and a message to that effect is
5189 22. If a "gecos" field in a passwd entry contained escaped characters, in
5190 particular, if it contained a \" sequence, Exim got it wrong when building
5191 a From: or a Sender: header from that name. A second bug also caused
5192 incorrect handling when an unquoted " was present following a character
5193 that needed quoting.
5195 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5196 was not being matched caselessly.
5198 24. Arranged for all hyphens in the exim.8 source to be escaped with
5201 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5202 properly. Recipient callout cache records were still being keyed to include
5203 the sender, even when use_sender was set false. This led to far more
5204 callouts that were necessary. The sender is no longer included in the key
5205 when use_sender is false.
5207 26. Added "control = submission" modifier to ACLs.
5209 27. Added the ${base62d: operator to decode base 62 numbers.
5211 28. dnsdb lookups can now access SRV records.
5213 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5214 the configuration file.
5216 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5217 (-v) mode. This makes the output for a verbose queue run more intelligible.
5219 31. Added a use_postmaster feature to recipient callouts.
5221 32. Added the $body_zerocount variable, containing the number of binary zero
5222 bytes in the message body.
5224 33. The time of last modification of the "new" subdirectory is now used as the
5225 "mailbox time last read" when there is a quota error for a maildir
5228 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5230 35. Added +ignore_unknown as a special item in host lists.
5232 36. Code for decoding IPv6 addresses in host lists is now included, even if
5233 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5234 address was recognized as an IP address, but was then not correctly decoded
5235 into binary, causing unexpected and incorrect effects when compared with
5242 1. Very minor rewording of debugging text in manualroute to say "list of
5243 hosts" instead of "hostlist".
5245 2. If verify=header_syntax was set, and a header line with an unqualified
5246 address (no domain) and a large number of spaces between the end of the
5247 name and the colon was received, the reception process suffered a buffer
5248 overflow, and (when I tested it) crashed. This was caused by some obsolete
5249 code that should have been removed. The fix is to remove it!
5251 3. When running in the test harness, delay a bit after writing a bounce
5252 message to get a bit more predictability in the log output.
5254 4. Added a call to search_tidyup() just before forking a reception process. In
5255 theory, someone could use a lookup in the expansion of smtp_accept_max_
5256 per_host which, without the tidyup, could leave open a database connection.
5258 5. Added the variables $recipient_data and $sender_data which get set from a
5259 lookup success in an ACL "recipients" or "senders" condition, or a router
5260 "senders" option, similar to $domain_data and $local_part_data.
5262 6. Moved the writing of debug_print from before to after the "senders" test
5265 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5266 problems for message scanning, either using a data ACL, or using
5267 local_scan() because the Received: header was not generated till after they
5268 were called (in order to set the time as the time of reception completion).
5269 I have revised the way this works. The header is now generated after the
5270 body is received, but before the ACL or local_scan() are called. After they
5271 are run, the timestamp in the header is updated.
5277 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5278 before starting a queue runner without re-exec. This happened only when
5279 deliver_drop_privilege was set or when the Exim user was set to root. The
5280 effect of the bug was that timeouts during subsequent deliveries caused
5281 crashes instead of being properly handled. The handler is now left at its
5282 default (and expected) setting.
5284 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5285 message, again when deliver_drop_privilege is set or Exim is run as root.
5286 The bug described in (1) was not present in this case, but the tidying up
5287 of the other signals was missing. I have made the two cases consistent.
5289 3. The ignore_target_hosts setting on a manualroute router was being ignored
5290 for hosts that were looked up using the /MX notation.
5292 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5295 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5296 operated on the sender address. After changing the $sender_address to <>
5297 for the sender address verify, Exim was re-instated it as the original
5298 (before rewriting) address, but remembering that it had rewritten it, so it
5299 wasn't rewriting it again. This bug also had the effect of breaking the
5300 sender address verification caching when the sender address was rewritten.
5302 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5303 This has been changed so that if the ip literal address matches
5304 ignore_target_hosts, the router declines.
5306 7. Added expansion conditions match_domain, match_address, and match_local_
5307 part (NOT match_host).
5309 8. The placeholder for the Received: header didn't have a length field set.
5311 9. Added code to Exim itself and to exim_lock to test for a specific race
5312 condition that could lead to file corruption when using MBX delivery. The
5313 issue is with the lockfile that is created in /tmp. If this file is removed
5314 after a process has opened it but before that process has acquired a lock,
5315 there is the potential for a second process to recreate the file and also
5316 acquire a lock. This could lead to two Exim processes writing to the file
5317 at the same time. The added code performs the same test as UW imapd; it
5318 checks after acquiring the lock that its file descriptor still refers to
5319 the same named file.
5321 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5322 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5325 11. Added the smtp_active_hostname option. If used, this will typically be made
5326 to depend on the incoming interface address. Because $interface_address is
5327 not set up until the daemon has forked a reception process, error responses
5328 that can happen earlier (such as "too many connections") no longer contain
5331 12. If an expansion in a condition on a "warn" statement fails because a lookup
5332 defers, the "warn" statement is abandoned, and the next ACL statement is
5333 processed. Previously this caused the whole ACL to be aborted.
5335 13. Added the iplsearch lookup type.
5337 14. Added ident_timeout as a log selector.
5339 15. Added tls_certificate_verified as a log selector.
5341 16. Added a global option tls_require_ciphers (compare the smtp transport
5342 option of the same name). This controls incoming TLS connections.
5344 17. I finally figured out how to make tls_require_ciphers do a similar thing
5345 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5346 before starting the TLS session.
5348 18. Tabs are now shown as \t in -bP output.
5350 19. If the log selector return_path_on_delivery was set, Exim crashed when
5351 bouncing a message because it had too many Received: header lines.
5353 20. If two routers both had headers_remove settings, and the first one included
5354 a superfluous trailing colon, the final name in the first list and the
5355 first name in the second list were incorrectly joined into one item (with a
5356 colon in the middle).
5362 1. Added -C and -D options to the exinext utility, mainly to make it easier
5363 to include in the automated testing, but these could be helpful when
5364 multiple configurations are in use.
5366 2. The exinext utility was not formatting the output nicely when there was
5367 an alternate port involved in the retry record key, nor when there was a
5368 message id as well (for retries that were specific to a specific message
5369 and a specific host). It was also confused by IPv6 addresses, because of
5370 the additional colons they contain. I have fixed the IPv4 problem, and
5371 patched it up to do a reasonable job for IPv6.
5373 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5374 delivery, the log line now contains "pipelined" if PIPELINING was used.
5376 4. An SMTP transport process used to panic and die if the bind() call to set
5377 an explicit outgoing interface failed. This has been changed; it is now
5378 treated in the same way as a connect() failure.
5380 5. A reference to $sender_host_name in the part of a conditional expansion
5381 that was being skipped was still causing a DNS lookup. This no longer
5384 6. The def: expansion condition was not recognizing references to header lines
5385 that used bh_ and bheader_.
5387 7. Added the _cache feature to named lists.
5389 8. The code for checking quota_filecount in the appendfile transport was
5390 allowing one more file than it should have been.
5392 9. For compatibility with Sendmail, the command line option
5400 and sets the incoming protocol and host name (for trusted callers). The
5401 host name and its colon can be omitted when only the protocol is to be set.
5402 Note the Exim already has two private options, -pd and -ps, that refer to
5403 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5404 "s", but I don't think that's a major issue.
5406 10. A number of refactoring changes to the code, none of which should affect
5409 (a) The number of logging options was getting close to filling up the
5410 32-bit word that was used as a bit map. I have split them into two classes:
5411 those that are passed in the argument to log_write(), and those that are
5412 only ever tested independently outside of that function. These are now in
5413 separate 32-bit words, so there is plenty of room for expansion again.
5414 There is no change in the user interface or the logging behaviour.
5416 (b) When building, for example, log lines, the code previously used a
5417 macro that called string_cat() twice, in order to add two strings. This is
5418 not really sufficiently general. Furthermore, there was one instance where
5419 it was actually wrong because one of the argument was used twice, and in
5420 one call a function was used. (As it happened, calling the function twice
5421 did not affect the overall behaviour.) The macro has been replaced by a
5422 function that can join an arbitrary number of extra strings onto a growing
5425 (c) The code for expansion conditions now uses a table and a binary chop
5426 instead of a serial search (which was left over from when there were very
5427 few conditions). Also, it now recognizes conditions like "pam" even when
5428 the relevant support is not compiled in: a suitably worded error message is
5429 given if an attempt is made to use such a condition.
5431 11. Added ${time_interval:xxxxx}.
5433 12. A bug was causing one of the ddress fields not to be passed back correctly
5434 from remote delivery subprocesses. The field in question was not being
5435 subsequently used, so this caused to problems in practice.
5437 13. Added new log selectors queue_time and deliver_time.
5439 14. Might have fixed a bug in maildirsizefile handling that threw up
5440 "unexpected character" debug warnings, and recalculated the data
5441 unnecessarily. In any case, I expanded the warning message to give more
5444 15. Added the message "Restricted characters in address" to the statements in
5445 the default ACL that block characters like @ and % in local parts.
5447 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5448 Three changes have been made:
5450 (a) There was a serious bug; a negative response to MAIL caused the whole
5451 recipient domain to be cached as invalid, thereby blocking all messages
5452 to all local parts at the same domain, from all senders. This bug has
5453 been fixed. The domain is no longer cached after a negative response to
5454 MAIL if the sender used is not empty.
5456 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5459 (c) A new callout option, "use_sender" has been added for people who want
5460 the modified behaviour.
5466 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5469 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5470 indeed breaks things for older releases.
5472 3. Added additional logging to the case where there is a problem reading data
5473 from a filter that is running in a subprocess using a pipe, in order to
5474 try to track down a specific problem.
5476 4. Testing facility fudge: when running in the test harness and attempting
5477 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5478 getting "No route to host". Convert this to a timeout.
5480 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5483 6. Some OS don't have socklen_t but use size_t instead. This affects the
5484 fifth argument of getsockopt() amongst other things. This is now
5485 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5486 can be set for individual OS. I have set it for SunOS5, OSF1, and
5487 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5488 some earlier ones do not.
5490 7. Change 4.30/15 was not doing the test caselessly.
5492 8. The standard form for an IPv6 address literal was being rejected by address
5493 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5494 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5495 this, as well as the form without the "IPv6" on the front (but only when
5496 address literals are enabled, of course).
5498 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5500 10. Exim crashed if a message with an empty sender address specified by -f
5501 encountered a router with an errors_to setting. This could be provoked only
5502 by a command such as
5506 where an empty string was supplied; "<>" did not hit this bug.
5508 11. Installed PCRE release 4.5.
5510 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5511 remained set. It is now erased.
5513 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5514 times from message ids (which are base 36 rather than the normal 62).
5516 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5517 were being counted as actual protocol errors, and logged if the log
5518 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5519 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5520 and DATA following a set of rejected RCPTs do not count as protocol errors.
5521 In other words, Exim assumes they were pipelined, though this may not
5522 actually be the case. Of course, in all cases the client gets an
5523 appropriate error code.
5525 15. If a lookup fails in an ACL condition, a message about the failure may
5526 be available; it is used if testing the ACL cannot continue, because most
5527 such messages specify what the cause of the deferral is. However, some
5528 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5529 that caused an old message to be retained and used if a later statement
5530 caused a defer, replacing the real cause of the deferral.
5532 16. If an IP address had so many PTR records that the DNS lookup buffer
5533 was not large enough to hold them, Exim could crash while trying to process
5534 the truncated data. It now detects and logs this case.
5536 17. Further to 4.21/58, another change has been made: if (and only if) the
5537 first line of a message (the first header line) ends with CRLF, a bare LF
5538 in a subsequent header line has a space inserted after it, so as not to
5539 terminate the header.
5541 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5542 unnecessarily, used atoi() instead of strtol(), and didn't check the
5543 termination when getting file sizes from file names by regex.
5545 19. Completely re-implemented the support for maildirsize files, in the light
5546 of a number of problems with the previous contributed implementation
5547 (4.30/29). In particular:
5549 . If the quota is zero, the maildirsize file is maintained, but no quota is
5552 . If the maildir directory does not exist, it is created before any attempt
5553 to write a maildirsize file.
5555 . The quota value in the file is just a cache; if the quota is changed in
5556 the transport, the new value overrides.
5558 . A regular expression is available for excluding directories from the
5561 20. The autoreply transport checks the characters in options that define the
5562 message's headers; it allows continued headers, but it was checking with
5563 isspace() after an embedded newline instead of explicitly looking for a
5566 21. If all the "regular" hosts to which an address was routed had passed their
5567 expiry times, and had not reached their retry times, the address was
5568 bounced, even if fallback hosts were defined. Now Exim should go on to try
5571 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5572 equivalent code in the SMTP transport. Some hosts send humungous responses
5573 to HELO/EHLO, more than 1024 it seems.
5575 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5576 gives compiler warnings in some environments. I've now done it "properly",
5579 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5580 (because of problems with the built-in one) was declared to return uschar *
5581 instead of char *, causing compiler failure.
5583 25. Fixed a file descriptor leak when processing alias/forward files.
5585 26. Fixed a minor format string issue in dbfn.c.
5587 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5589 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5590 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5593 29. When a sender address is verified, it is cached, to save repeating the test
5594 when there is more than one recipient in a message. However, when the
5595 verification involves a callout, it is possible for different callout
5596 options to be set for different recipients. It is too complicated to keep
5597 track of this in the cache, so now Exim always runs a verification when a
5598 callout is required, relying on the callout cache for the optimization.
5599 The overhead is duplication of the address routing, but this should not be
5602 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5603 to be verified with callout=postmaster, and the main callout worked but the
5604 postmaster check failed, the verification correctly failed. However, if a
5605 subsequent RCPT command asked for sender verification *without* the
5606 postmaster check, incorrect caching caused this verification also to fail,
5609 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5610 it was not caching the DNS options (qualify_single, search_parents) that
5611 were used when the lookup failed. A subsequent lookup with different
5612 options therefore always gave the same answer, though there were cases
5613 where it should not have. (Example: a "domains = !$mx_any" option on a
5614 dnslookup router: the "domains" option is always processed without any
5615 widening, but the router might have qualify_single set.) Now Exim uses the
5616 cached value only when the same options are set.
5618 32. Added John Jetmore's "exipick" utility to the distribution.
5620 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5621 than a timeout (e.g. a certificate is required, and is not provided), an
5622 Exim server now closes the connection immediately. Previously it waited for
5623 the client to close - but if the client is SSL, it seems that they each
5624 wait for each other, leading to a delay before one of them times out.
5626 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5627 maintained 0.8.x compatibility because I don't think many are using it, and
5628 it is clearly obsolete.
5630 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5633 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5634 client certificate was expired. A simple patch fixes this, though I don't
5635 understand the full logic of why the verify callback is called multiple
5638 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5639 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5640 which causes problems with some clients (such as the Certicom SSL Plus
5641 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5642 disables the coutermeasure allowing Eudora to connect."
5644 38. Exim was not checking that a write() to a log file succeeded. This could
5645 lead to Bad Things if a log got too big, in particular if it hit a file
5646 size limit. Exim now panics and dies if it cannot write to a log file, just
5647 as it does if it cannot open a log file.
5649 39. Modified OS/Makefile-Linux so that it now contains
5651 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5653 The two -D definitions ensure that Exim is compiled with large file
5654 support, which makes it possible to handle log files that are bigger than
5657 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5658 instance) a domain was checked against a named list that involved a lookup,
5659 causing $domain_data to be set, then another domain was checked against the
5660 same list, then the first domain was re-checked, the value of $domain_data
5661 after the final check could be wrong. In particular, if the second check
5662 failed, it could be set empty. This bug probably also applied to
5665 41. The strip_trailing_dot option was not being applied to the address given
5666 with the -f command-line option.
5668 42. The code for reading a message's header from the spool was incrementing
5669 $received_count, but never initializing it. This meant that the value was
5670 incorrect (doubled) while delivering a message in the same process in which
5671 it was received. In the most common configuration of Exim, this never
5672 happens - a fresh exec is done - but it can happen when
5673 deliver_drop_privilege is set.
5675 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5676 it now includes up to 150 characters of the unexpected data in the log
5679 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5680 and building data strings. The size of both of these buffers was 10 000
5681 bytes - far larger than anybody would *ever* want, thought I. Needless to
5682 say, somebody hit the limit. I have increased the maximum line length to
5683 20 000 and the maximum data length of concatenated lines to 100 000. I have
5684 also fixed two bugs, because there was no checking on these buffers. Tsk,
5685 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5686 buffer is too small.
5688 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5689 lsearch lookups. Now it does.
5691 46. When parsing a route_list item in a manualroute router, a fixed-length
5692 buffer was used for the list of hosts. I made this 1024 bytes long,
5693 thinking that nobody would ever have a list of hosts that long. Wrong.
5694 Somebody had a whole pile of complicated expansion conditions, and the
5695 string was silently truncated, leading to an expansion error. It turns out
5696 that it is easier to change to an unlimited length (owing to other changes
5697 that have happened since this code was originally written) than to build
5698 structure for giving a limitation error. The length of the item that
5699 expands into the list of hosts is now unlimited.
5701 47. The lsearch lookup could not handle data where the length of text line was
5702 more than 4095 characters. Such lines were truncated, leading to shortened
5703 data being returned. It should now handle lines of any length.
5705 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5706 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5709 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5710 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5711 no longer happens in comment lines. A list of replacements is now placed
5712 at the head of all of the source files, except those whose only change is
5713 to replace PERL_COMMAND in the very first #! line.
5715 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5716 messages on the queue, with a bottom-up merge sort, using code contributed
5717 by Michael Haardt. This should make operations like -bp somewhat faster on
5718 large queues. It won't affect queue runners, except when queue_run_in_order
5721 51. Installed eximstats 1.31 in the distribution.
5723 52. Added support for SRV lookups to the dnslookup router.
5725 53. If an ACL referred to $message_body or $message_body_end, the value was not
5726 reset for any messages that followed in the same SMTP session.
5728 54. The store-handling optimization for building very long strings was not
5729 differentiating between the different store pools. I don't think this
5730 actually made any difference in practice, but I've tidied it.
5732 55. While running the routers to verify a sender address, $sender_address
5733 was still set to the sender address. This is wrong, because when routing to
5734 send a bounce to the sender, it would be empty. Therefore, I have changed
5735 it so that, while verifying a sender address, $sender_address is set to <>.
5736 (There is no change to what happens when verifying a recipient address.)
5738 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5739 target A or AAAA records (if not already returned) without resetting the
5740 qualify_single or search_parents options of the DNS resolver. These are
5741 inappropriate in this case because the targets of MX and SRV records must
5742 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5743 target that, when qualified, matched something in the local domain. These
5744 two options are now turned off when doing these lookups.
5746 57. It seems that at least some releases of Reiserfs (which does not have the
5747 concept of a fixed number of inodes) returns zero and not -1 for the
5748 number of available inodes. This interacted badly with check_spool_inodes,
5749 which assumed that -1 was the "no such thing" setting. What I have done is
5750 to check that the total number of inodes is greater than zero before doing
5751 the test of how many are available.
5753 58. When a "warn" ACL statement has a log_message modifier, the message is
5754 remembered, and not repeated. This is to avoid a lot of repetition when a
5755 message has many recipients that cause the same warning to be written.
5756 However, Exim was preserving the list of already written lines for an
5757 entire SMTP session, which doesn't seem right. The memory is now reset if a
5758 new message is started.
5760 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5761 debugging output unless log_rewrite was also set.
5763 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5764 of (int)(handle) when we know that handle contains (void *)(-1).
5766 61. The Exim daemon panic-logs an error return when it closes the incoming
5767 connection. However "connection reset by peer" seems to be common, and
5768 isn't really an error worthy of noting specially, so that particular error
5771 62. When Exim is trying to find all the local interfaces, it used to panic and
5772 die if the ioctl to get the interface flags failed. However, it seems that
5773 on at least one OS (Solaris 9) it is possible to have an interface that is
5774 included in the list of interfaces, but for which you get a failure error
5775 for this call. This happens when the interface is not "plumbed" into a
5776 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5777 failure of the "get flags" call assumes that the interface is down.
5779 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5780 makes life easier for people who are doing arithmetic on fields extracted
5781 from dates, where you often get leading zeros that should not be
5782 interpreted as octal.
5784 64. Added qualify_domain to the redirect router, to override the global
5787 65. If a pathologically long header line contained very many addresses (the
5788 report of this problem mentioned 10 000) and each of them was rewritten,
5789 Exim could use up a very large amount of memory. (It kept on making new
5790 copies of the header line as it rewrote, and never released the old ones.)
5791 At the expense of a bit more processing, the header rewriting function has
5792 been changed so that it no longer eats memory in this way.
5794 66. The generation of the Received: header has been moved from the time that a
5795 message starts to be received, to the time that it finishes. The timestamp
5796 in the Received: header should now be very close to that of the <= log
5797 line. There are two side-effects of this change:
5799 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5800 logged header lines no longer include the local Received: line, because
5801 it has not yet been created. The same applies to a copy of the message
5802 that is returned to a non-SMTP sender when a message is rejected.
5804 (b) When a filter file is tested using -bf, no additional Received: header
5805 is added to the test message. After some thought, I decided that this
5808 This change does not affect the value of $received_for. It is still set
5809 after address rewriting, but before local_scan() is called.
5811 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5813 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5814 gave an unhelpful panic error message, and a defer error. I have managed to
5815 change this behaviour so that it now rejects any supplied certificate,
5816 which seems right, as the list of acceptable certificates is empty.
5818 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5819 gave an unhelpful defer error. I have not managed to make this reject any
5820 supplied certificates, but the error message it gives is "no certificate
5821 supplied", which is not helpful.
5823 70. exigrep's output now also includes lines that are not associated with any
5824 message, but which match the given pattern. Implemented by a patch from
5825 Martin Sluka, which also tidied up the Perl a bit.
5827 71. Recipient callout verification, like sender verification, was using <> in
5828 the MAIL FROM command. This isn't really the right thing, since the actual
5829 sender may affect whether the remote host accepts the recipient or not. I
5830 have changed it to use the actual sender in the callout; this means that
5831 the cache record is now keyed on a recipient/sender pair, not just the
5832 recipient address. There doesn't seem to be a real danger of callout loops,
5833 since a callout by the remote host to check the sender would use <>.
5834 [SEE ABOVE: changed after hitting problems.]
5836 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5837 temporary errors. However, in the case of such a code being given after
5838 the end of a data transmission (i.e. after ".") Exim was failing to write
5839 a retry record for the message. (Yes, there was some broken host that was
5840 actually sending 8xx at this point.)
5842 73. An unknown lookup type in a host list could cause Exim to panic-die when
5843 the list was checked. (An example that provoked this was putting <; in the
5844 middle of a list instead of at the start.) If this happened during a DATA
5845 ACL check, a -D file could be left lying around. This kind of configuration
5846 error no longer causes Exim to die; instead it causes a defer error. The
5847 incident is still logged to the main and panic logs.
5849 74. Buglet left over from Exim 3 conversion. The message "too many messages
5850 in one connection" was written to the rejectlog but not the mainlog, except
5851 when address rewriting (yes!) was being logged.
5853 75. Added write_rejectlog option.
5855 76. When a system filter was run not as root (that is, when system_filter_user
5856 was set), the values of the $n variables were not being returned to the
5857 main process; thus, they were not subsequently available in the $sn
5860 77. Added +return_path_on_delivery log selector.
5862 78. A connection timeout was being treated differently from recipients deferred
5863 when testing hosts_max_try with a message that was older than the host's
5864 retry timeout. (The host should not be counted, thus allowing all hosts to
5865 be tried at least once before bouncing.) This may have been the cause of an
5866 occasionally reported bug whereby a message would remain on the queue
5867 longer than the retry timeout, but would be bounced if a delivery was
5868 forced. I say "may" because I never totally pinned down the problem;
5869 setting up timeout/retry tests is difficult. See also the next item.
5871 79. The ultimate address timeout was not being applied to errors that involved
5872 a combination of host plus message (for example, a timeout on a MAIL
5873 command). When an address resolved to a number of possible hosts, and they
5874 were not all tried for each delivery (e.g. because of hosts_max_try), a
5875 message could remain on the queue longer than the retry timeout.
5877 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5880 81. Fixed an obscure SMTP outgoing bug which required at least the following
5881 conditions: (a) there was another message waiting for the same server;
5882 (b) the server returned 5xx to all RCPT commands in the first message so
5883 that the message was not completed; (c) the server dropped the connection
5884 or gave a negative response to the RSET that Exim sends to abort the
5885 transaction. The observed case was a dropped connection after DATA that had
5886 been sent in pipelining mode. That is, the server had advertised PIPELINING
5887 but was not implementing it correctly. The effect of the bug was incorrect
5888 behaviour, such as trying another host, and this could lead to a crash.
5894 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5895 and daemon.c were passed as pointers to ints; they should have been
5896 pointers to socklen_t variables (which are typically unsigned ints).
5898 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5901 3. Fixed a really odd bug that affected only the testing scheme; patching a
5902 certain fixed string in the binary changed the value of another string that
5903 happened to be identical to the end of the original first string.
5905 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5906 name", it returns that address as the IP address. On some operating
5907 systems (e.g. Solaris), it also passes back the IP address string as the
5908 "host name". However, on others (e.g. Linux), it passes back an empty
5909 string. Exim wasn't checking for this, and was changing the host name to an
5910 empty string, assuming it had been canonicalized.
5912 5. Although rare, it is permitted to have more than one PTR record for a given
5913 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5914 all the names associated with an address, because they do in Solaris.
5915 However, it seems that they do not in Linux for data that comes from the
5916 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5917 I found this out when I moved to a new Linux workstation and tried to run
5918 the Exim test suite.
5920 To get round this problem I have changed the code so that it now does its
5921 own call to the DNS to look up PTR records when searching for a host name.
5922 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5923 addresses that are only in /etc/hosts are still found.
5925 This behaviour is, however, controlled by an option called host_lookup_
5926 order, which defaults to "bydns:byaddr". If people want to use the other
5927 order, or indeed, just use one or the other means of lookup, they can
5928 specify it in this variable.
5930 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5931 some operating systems, this comes back from gethostbyaddr() as an empty
5932 string, and this is what Exim used to test for. However, it seems that in
5933 other systems, "." is yielded. Exim now tests for this case too.
5935 7. The values of check_spool_space and check_log_space are now held internally
5936 as a number of kilobytes instead of an absolute number of bytes. If a
5937 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5938 kilobyte. This means that much larger values can be stored.
5940 8. Exim monitor: an attempt to get the action menu when not actually pointing
5941 at a message produces an empty menu entitled "No message selected". This
5942 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5943 no entries in it ("Shell widget menu has zero width and/or height"). So I
5944 have added a single, blank menu entry in this case.
5946 9. Added ${quote_local_part.
5948 10. MIME decoding is now applied to the contents of Subject: header lines when
5951 11. Now that a reference to $sender_host_address automatically causes a reverse
5952 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5953 host lookup before query-style lookups in lists that might use this
5954 variable. This has therefore been abolished, and the "net-" prefix is no
5955 longer necessary for query-style lookups.
5957 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5958 have been a typo for LFLAGS, so it has been changed.
5960 13. The install script calls Exim with "-C /dev/null" in order to find the
5961 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5962 to be output. However, since Exim outputs its version number before the
5963 error, it didn't break the script. It just looked ugly. I fixed this by
5964 always allowing "-C /dev/null" if the caller is root.
5966 14. Ignore overlarge ACL variable number when reading spool file - insurance
5967 against a later release with more variables having written the file.
5969 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5970 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5971 this, as well as the form without the "IPv6" on the front.
5973 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5974 OS/Makefile-Darwin file.
5976 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5977 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5979 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5980 variable. However, some OS use ints for inodes. I've added cast to long int
5981 to get rid of the compiler warning.
5983 19. I had forgotten to lock out "/../" in configuration file names when
5984 ALT_CONFIG_PREFIX was set.
5986 20. Routers used for verification do not need to specify transports. However,
5987 if such a router generated a host list, and callout was configured, Exim
5988 crashed, because it could not find a port number from the (non-existent)
5989 transport. It now assumes port 25 in this circumstance.
5991 21. Added the -t option to exigrep.
5993 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5994 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5995 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5996 them is set, LOOKUP_LSEARCH is forced.
5998 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6000 24. Added sender and host information to the "rejected by local_scan()" log
6001 line; previously there was no indication of these.
6003 25. Added .include_if_exists.
6005 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6006 Linux. It turns out that not all file systems support this. Apparently some
6007 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6008 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6009 not supported on the file descriptor, is now ignored when Exim is trying to
6010 sync a directory. This applies only to Linux.
6012 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6014 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6015 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6018 29. Added support for maildirsize files from supplied patch (modified a bit).
6020 30. The use of :fail: followed by an empty string could lead Exim to respond to
6021 sender verification failures with (e.g.):
6023 550 Verification failed for <xxx>
6024 550 Sender verify failed
6026 where the first response line was missing the '-' that indicates it is not
6027 the final line of the response.
6029 31. The loop for finding the name of the user that called Exim had a hardwired
6030 limit of 10; it now uses the value of finduser_retries, which is used for
6031 all other user lookups.
6033 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6036 33. Exim was neglecting to zero errno before one call of strtol() when
6037 expanding a string and expecting an integer value. On some systems this
6038 resulted in spurious "integer overflow" errors. Also, it was casting the
6039 result into an int without checking.
6041 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6042 did not work. The code looks as if it has *never* worked, though it appears
6043 to have been documented since at least release 1.62. I have made it work.
6045 35. The "timeout_DNS" error in retry rules, also documented since at least
6046 1.62, also never worked. As it isn't clear exactly what this means, and
6047 clearly it isn't a major issue, I have abolished the feature by treating it
6048 as "timeout", and writing a warning to the main and panic logs.
6050 36. The display of retry rules for -brt wasn't always showing the error code
6053 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6054 timeout_connect_A, timeout_connect_MX.
6056 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6057 to the empty sender.
6059 39. The daemon was not analysing the content of -oX till after it had closed
6060 stderr and disconnected from the controlling terminal. This meant that any
6061 syntax errors were only noted on the panic log, and the return code from
6062 the command was 0. By re-arranging the code a little, I've made the
6063 decoding happen first, so such errors now appear on stderr, and the return
6064 code is 1. However, the actual setting up of the sockets still happens in
6065 the disconnected process, so errors there are still only recorded on the
6068 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6069 connections (as happens on some IP stacks) was logged at start up time as
6070 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6071 it from "IPv6 and IPv4", which means that two separate sockets are being
6074 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6075 says whether AF_INET or AF_INET6 was passed as an argument.
6077 42. Exiwhat output was messed up when time zones were included in log
6080 43. Exiwhat now gives more information about the daemon's listening ports,
6081 and whether -tls-on-connect was used.
6083 44. The "port" option of the smtp transport is now expanded.
6085 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6086 silently ignored. Now an error message is written to the main and panic
6089 46. There's a new ACL modifier called "logwrite" which writes to a log file
6090 as soon as it is encountered.
6092 47. Added $local_user_uid and $local_user_gid at routing time.
6094 48. Exim crashed when trying to verify a sender address that was being
6097 49. Exim was recognizing only a space character after ".include". It now also
6098 recognizes a tab character.
6100 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6101 extracting the relevant information from the specification. The man page no
6102 longer contains scrambled data for the -d option, and I've added a section
6103 at the front about calling Exim under different names.
6105 51. Added "extra_headers" argument to the "mail" command in filter files.
6107 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6110 53. Installed eximstats 1.29.
6112 54. Added transport_filter_timeout as a generic transport option.
6114 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6115 Cc: header lines. This was required by RFC 822, but it not required by RFC
6118 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6119 incoming messages that did not have them. Now it does so only if the
6120 message originates locally, that is, if there is no associated remote host
6121 address. When Resent- header lines are present, this applies to the Resent-
6122 lines rather than the non-Resent- lines.
6124 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6125 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6127 58. Messages for configuration errors now include the name of the main
6128 configuration file - useful now that there may be more than one file in a
6129 list (.included file names were always shown).
6131 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6132 for those rare installations that do not start the daemon as root or run it
6133 setuid root. I've cut out the call to initgroups() if the daemon is not
6136 60. The Exim user and group can now be bound into the binary as text strings
6137 that are looked up at the start of Exim's processing.
6139 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6141 62. Added $mailstore_basename variable.
6143 63. Installed patch to sieve.c from Michael Haardt.
6145 64. When Exim failed to open the panic log after failing to open the main log,
6146 the original message it was trying to log was written to stderr and debug
6147 output, but if they were not available (the usual case in production), it
6148 was lost. Now it is written to syslog before the two lines that record the
6149 failures to open the logs.
6151 65. Users' Exim filters run in subprocesses under the user's uid. It is
6152 possible for a "deliver" command or an alias in a "personal" command to
6153 provoke an address rewrite. If logging of address rewriting is configured,
6154 this fails because the process is not running as root or exim. There may be
6155 a better way of dealing with this, but for the moment (because 4.30 needs
6156 to be released), I have disabled address rewrite logging when running a
6157 filter in a non-root, non-exim process.
6163 1. The buildconfig auxiliary program wasn't quoting the value set for
6164 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6165 not defined. This bug was masked in 4.22 by the effect that was fixed in
6168 2. Some messages that were rejected after a message id was allocated were
6169 shown as "incomplete" by exigrep. It no longer does this for messages that
6170 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6172 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6173 have allow_domain_literals set, the ID did not get logged in the <= line.
6174 Domain literals are now always recognized in Message-ID: header lines.
6176 4. The first argument for a ${extract expansion item is the key name or field
6177 number. Leading and trailing spaces in this item were not being ignored,
6178 causing some misleading effects.
6180 5. When deliver_drop_privilege was set, single queue runner processes started
6181 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6182 same command in the process it spins off) were not dropping privilege.
6184 6. When the daemon running as "exim" started a queue runner, it always
6185 re-executed Exim in the spun-off process. This is a waste of effort when
6186 deliver_drop_privilege is set. The new process now just calls the
6187 queue-runner function directly.
6193 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6196 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6197 ignored. Though the use of -oP was forcing the writing of a pid file, it
6198 was always written to the default place.
6200 3. If the message "no IP address found for host xxxx" is generated during
6201 incoming verification, it is now followed by identification of the incoming
6202 connection (so you can more easily find what provoked it).
6204 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6206 5. Added some features to "harden" Exim a bit more against certain attacks:
6208 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6209 be put in Local/Makefile. This is like the never_users runtime option,
6210 but it cannot be overridden. The default setting is "root".
6212 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6213 prefix string with which any file named in a -C command line option
6216 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6217 is retained for -C and -D only if the caller of Exim is root. Without
6218 it, the exim user may also use -C and -D and retain privilege.
6220 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6221 command line option is disabled.
6223 6. Macro names set by the -D option must start with an upper case letter, just
6224 like macro names defined in the configuration file.
6226 7. Added "dereference=" facility to LDAP.
6228 8. Two instances of the typo "uknown" in the source files are fixed.
6230 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6231 the Configure-Makefile script screwed up while processing it.
6233 10. Incorporated PCRE 4.4.
6235 11. The SMTP synchronization check was not operating right at the start of an
6236 SMTP session. For example, it could not catch a HELO sent before the client
6237 waited for the greeting. There is now a check for outstanding input at the
6238 point when the greeting is written. Because of the duplex, asynchronous
6239 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6240 way, but not yet received, when the check is performed.
6242 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6243 on TCP/IP sockets, because this apparently causes some broken clients to
6246 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6247 unchanged) from the Cygwin maintainer.
6249 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6250 was supported instead of testing for mbx. Effectively a typo.
6252 15. The spa authenticator server code was not checking that the input it
6253 received was valid base64.
6255 16. The debug output line for the "set" modifier in ACLs was not showing the
6256 name of the variable that was being set.
6258 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6260 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6261 lookup on its own. Something else was needed to trigger the lookup. For
6262 example, a match in host_lookup or the need for a host name in a host list.
6263 Now, if $sender_host_name is referenced and the host name has not yet been
6264 looked up, a lookup is performed. If the lookup fails, the variable remains
6265 empty, and $host_lookup_failed is set to "1".
6267 19. Added "eqi" as a case-independent comparison operator.
6269 20. The saslauthd authentication condition could segfault if neither service
6270 nor realm was specified.
6272 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6273 error message that was logged was misleading, and incoming SMTP
6274 connections were dropped. The message is now more accurate, and temporary
6275 errors are given to SMTP connections.
6277 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6278 (except RSET) with a 421 error, until QUIT is received. However, it was
6279 failing to send a response to QUIT.
6281 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6282 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6283 ACL is now run after the helo_try_verify_hosts code.
6285 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6286 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6287 case-independent, so other case variants are also recognized). Apparently
6288 some systems use these upper case variants.
6290 25. If more than two messages were waiting for the same host, and a transport
6291 filter was specified for the transport, Exim sent two messages over the
6292 same TCP/IP connection, and then failed with "socket operation on non-
6293 socket" when it tried to send the third.
6295 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6297 27. The extern definition of crypt16() in expand.c was not being excluded when
6298 the OS had its own crypt16() function.
6300 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6301 as a preferred synonym for return_size_limit, both as an option and as an
6304 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6306 30. Changed the default configuration ACL to relax the local part checking rule
6307 for addresses that are not in any local domains. For these addresses,
6308 slashes and pipe symbols are allowed within local parts, but the sequence
6309 /../ is explicitly forbidden.
6311 31. SPA server authentication was not clearing the challenge buffer before
6314 32. log_message in a "warn" ACL statement was writing to the reject log as
6315 well as to the main log, which contradicts the documentation and doesn't
6316 seem right (because no rejection is happening). So I have stopped it.
6318 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6319 However, I am unable to do any testing of this.
6321 34. Fixed an infelicity in the appendfile transport. When checking directories
6322 for a mailbox, to see if any needed to be created, it was accidentally
6323 using path names with one or more superfluous leading slashes; tracing
6324 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6326 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6327 contents are added to the log line that is written for every discarded
6328 recipient. (Previously a log_message setting was ignored.)
6330 36. The ${quote: operator now quotes the string if it is empty.
6332 37. The install script runs exim in order to find its version number. If for
6333 some reason other than non-existence or emptiness, which it checks, it
6334 could not run './exim', it was installing it with an empty version number,
6335 i.e. as "exim-". This error state is now caught, and the installation is
6338 38. An argument was missing from the function that creates an error message
6339 when Exim fails to connect to the socket for saslauthd authentication.
6340 This could cause Exim to crash, or give a corrupted message.
6342 39. Added isip, isip4, and isip6 to ${if conditions.
6344 40. The ACL variables $acl_xx are now saved with the message, and can be
6345 accessed later in routers, transports, and filters.
6347 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6348 strings in the file are not string-expanded.
6350 42. If a MAIL command specified a SIZE value that was too large to fit into an
6351 int variable, the check against message_size_limit failed. Such values are
6352 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6353 day this will have to be increased, but I don't think I want to be around
6354 when emails are that large.
6361 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6362 iconv() is not standard in FreeBSD.
6364 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6365 IPv6 enabled. The observed symptom was a segmentation fault on return from
6366 the function os_common_find_running_interfaces() in src/os.c.
6368 3. In the check_special_case() function in daemon.c I had used "errno" as an
6369 argument name, which causes warnings on some systems. This was basically a
6370 typo, since it was named "eno" in the comments!
6372 4. The code that waits for the clock to tick (at a resolution of some fraction
6373 of a second) so as to ensure message-id uniqueness was always waiting for
6374 at least one whole tick, when it could have waited for less. [This is
6375 almost certainly not relevant at current processor speeds, where it is
6376 unlikely to ever wait at all. But we try to future-proof.]
6378 5. The function that sleeps for a time interval that includes fractions of a
6379 second contained a race. It did not block SIGALRM between setting the
6380 timer, and suspending (a couple of lines later). If the interval was short
6381 and the sigsuspend() was delayed until after it had expired, the suspension
6382 never ended. On busy systems this could lead to processes getting stuck for
6385 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6386 process, before it forks any delivery processes. The open lookup caching
6387 mechanism meant that the open file or database connection was passed into
6388 the delivery process. The problem was that delivery processes always tidy
6389 up cached lookup data. This could cause a problem for the next delivery
6390 process started by the queue runner, because the external queue runner
6391 process does not know about the closure. So the next delivery process
6392 still has data in the lookup cache. In the case of a file lookup, there was
6393 no problem because closing a file descriptor in a subprocess doesn't affect
6394 the parent. However, if the lookup was caching a connection to a database,
6395 the connection was closed, and the second delivery process was likely to
6396 see errors such as "PGSQL: query failed: server closed the connection
6397 unexpectedly". The problem has been fixed by closing all cached lookups
6398 in a queue runner before running a delivery process.
6400 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6401 seem to have the "const" qualifier which it has on other OS. I've
6404 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6405 *of the same type* (client or server) with the same public name that an
6406 error should be diagnosed.
6408 9. When Exim looked up a host name for an IP address, but failed to find the
6409 original IP address when looking up the host name (a safety check), it
6410 output the message "<ip address> does not match any IP for NULL", which was
6411 confusing, to say the least. The bug was that the host name should have
6412 appeared instead of "NULL".
6414 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6415 user that is built into the binary, and the -C or -D options is used, root
6416 privilege is dropped before the configuration file is read. In addition,
6417 logging is switched to stderr instead of the normal log files. If the
6418 configuration then re-defines the Exim user, the unprivileged environment
6419 is probably not what is expected, so Exim logs a panic warning message (but
6422 However, if deliver_drop_privilege is set, the unprivileged state may well
6423 be exactly what is intended, so the warning has been cut out in that case,
6424 and Exim is allowed to try to write to its normal log files.
6430 1. smtp_return_error_details was not giving details for temporary sender
6431 or receiver verification errors.
6433 2. Diagnose a configuration error if two authenticators have the same public
6436 3. Exim used not to create the message log file for a message until the first
6437 delivery attempt. This could be confusing when incoming messages were held
6438 for policy or load reasons. The message log file is now created at the time
6439 the message is received, and an initial "Received" line is written to it.
6441 4. The automatically generated man page for command line options had a minor
6442 bug that caused no ill effects; however, a more serious problem was that
6443 the procedure for building the man page automatically didn't always
6444 operate. Consequently, release 4.20 contains an out-of-date version. This
6445 shouldn't happen again.
6447 5. When building Exim with embedded Perl support, the script that builds the
6448 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6449 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6451 6. The freeze_tell option was not being used for messages that were frozen on
6452 arrival, either by an ACL or by local_scan().
6454 7. Added the smtp_incomplete_transaction log selector.
6456 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6457 was accepting AUTH without a new EHLO.
6459 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6460 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6463 10. Logging of TCP/IP connections (when configured) now happens in the main
6464 daemon process instead of the child process, so that the TCP/IP connection
6465 count is more accurate (but it can never be perfect).
6467 11. The use of "drop" in a nested ACL was not being handled correctly in the
6468 outer ACL. Now, if condition failure induced by the nested "drop" causes
6469 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6470 or "require"), the connection is dropped.
6472 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6473 that yield "discard" can now be used with an "accept" or a "discard" verb,
6474 but an error is generated for any others (because I can't see a useful way
6475 to define what should happen).
6477 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6478 are now processed in the same way as lines in the Exim configuration file.
6479 In particular, continuation lines are supported.
6481 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6483 15. Added -ti meaning -t -i.
6485 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6486 domains, and warn by logging if others are found.
6488 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6489 returned from GIFCONF when Exim is trying to find the list of interfaces on
6490 a host. The code in os.c has been modified to copy each ifreq to an aligned
6491 structure in all cases.
6493 Also, in some cases, the returned ifreq's were being copied to a 'struct
6494 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6495 means the last couple of bytes of an IPv6 address could be chopped if the
6496 ifreq contained only a normal sockaddr (14 bytes storage).
6498 18. Named domain lists were not supported in the hosts_treat_as_local option.
6499 An entry such as +xxxx was not recognized, and was treated as a literal
6502 19. Ensure that header lines added by a DATA ACL are included in the reject log
6503 if the ACL subsequently rejects the message.
6505 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6506 MD5 (which is deprecated).
6508 21. When testing a filter file using -bf, Exim was writing a message when it
6509 took the sender from a "From " line in the message, but it was not doing so
6510 when it took $return_path from a Return-Path: header line. It now does.
6512 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6513 with a valid header line field name (a series of printing characters
6514 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6516 23. Changed "disc" in the source to "disk" to conform to the documentation and
6517 the book and for uniformity.
6519 24. Ignore Sendmail's -Ooption=value command line item.
6521 25. When execve() failed while trying to run a command in a pipe transport,
6522 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6523 could be confused with a return value of 69 from the command itself. This
6524 has been changed to 127, the value the shell returns if it is asked to run
6525 a non-existent command. The wording for the related log line suggests a
6526 non-existent command as the problem.
6528 26. If received_header_text expands to an empty string, do not add a Received:
6529 header line to the message. (Well, it adds a token one on the spool, but
6530 marks it "old" so that it doesn't get used or transmitted.)
6532 27. Installed eximstats 1.28 (addition of -nt option).
6534 28. There was no check for failure on the call to getsockname() in the daemon
6535 code. This can fail if there is a shortage of resources on the system, with
6536 ENOMEM, for example. A temporary error is now given on failure.
6538 29. Contrary to the C standard, it seems that in some environments, the
6539 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6540 program. Exim now does this explicitly; it affects the formatting of
6541 timestamps using strftime().
6543 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6544 complaints. I've now initialized all the variables, to avoid this.
6546 32. Header lines added by a system filter were not being "seen" during
6547 transport-time rewrites.
6549 33. The info_callback() function passed to OpenSSL is set up with type void
6550 (*)(SSL *, int, int), as described somewhere. However, when calling the
6551 function (actually a macro) that sets it up, the type void(*)() is
6552 expected. I've put in a cast to prevent warnings from picky compilers.
6554 34. If a DNS black list lookup found a CNAME record, but there were no A
6555 records associated with the domain it pointed at, Exim crashed.
6557 35. If a DNS black list lookup returned more than one A record, Exim ignored
6558 all but the first. It now scans all returned addresses if a particular IP
6559 value is being sought. In this situation, the contents of the
6560 $dnslist_value variable are a list of all the addresses, separated by a
6563 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6564 to accept a host name and all its aliases if the forward lookup for any of
6565 them yielded the IP address of the incoming connection. Now it accepts only
6566 those names whose forward lookup yields the correct IP address. Any other
6567 names are discarded. This closes a loophole whereby a rogue DNS
6568 administrator could create reverse DNS records to break through a
6569 wildcarded host restriction in an ACL.
6571 37. If a user filter or a system filter that ran in a subprocess used any of
6572 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6573 the wrong values were passed to the pipe command ($thisaddress had the
6574 value of $0, $0 had the value of $1, etc). This bug was introduced by
6575 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6577 38. Improved the line breaking for long SMTP error messages from ACLs.
6578 Previously, if there was no break point between 40 and 75 characters, Exim
6579 left the rest of the message alone. Two changes have been made: (a) I've
6580 reduced the minimum length to 35 characters; (b) if it can't find a break
6581 point between 35 and 75 characters, it looks ahead and uses the first one
6582 that it finds. This may give the occasional overlong line, but at least the
6583 remaining text gets split now.
6585 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6586 file descriptors might be low, and that setting 1000 would always raise it.
6587 It turns out that in some environments, the limit is already over 1000 and
6588 that lowering it causes trouble. So now Exim takes care not to decrease it.
6590 40. When delivering a message, the value of $return_path is set to $sender_
6591 address at the start of routing (routers may change the value). By an
6592 oversight, this default was not being set up when an address was tested by
6593 -bt or -bv, which affected the outcome if any router or filter referred to
6596 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6597 log only when "message" or "log_message" are set. However, if one of the
6598 conditions was an address verification, or a call to a nested ACL, the
6599 messages generated by the underlying test were being passed through. This
6600 no longer happens. The underlying message is available in $acl_verify_
6601 message for both "message" and "log_message" expansions, so it can be
6602 passed through if needed.
6604 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6605 new expansion $bh_ to give the encoded byte string without charset
6606 translation. Translation happens only if iconv() is available; HAVE_ICONV
6607 indicates this at build time. HEADERS_CHARSET gives the charset to
6608 translate to; headers_charset can change it in the configuration, and
6609 "headers charset" can change it in an individual filter file.
6611 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6612 that creates RFC 2047 encoded "words" labels them as that charset instead
6613 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6614 expansion operator; (ii) when Exim creates a From: line for a local
6615 message; (iii) when a header line is rewritten to include a "phrase" part.
6617 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6618 buggy, causing it to skip the first lines of messages whose message ID
6619 ended in 'D'. This would not have bitten before Exim release 4.14, because
6620 message IDs were unlikely to end in 'D' before then. The effect was to have
6621 incorrect size information for certain domains.
6623 45. #include "config.h" was missing at the start of the crypt16.c module. This
6624 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6627 46. If there was a timeout during a "random" callout check, Exim treated it as
6628 a failure of the random address, and carried on sending RSET and the real
6629 address. If the delay was just some slowness somewhere, the response to the
6630 original RCPT would be taken as a response to RSET and so on, causing
6631 mayhem of various kinds.
6633 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6634 when I implemented it. It didn't allow for the fact that some option values
6635 may legitimately be negative (e.g. size_addition), and it didn't even do
6636 the right test for positive values.
6638 48. Domain names in DNS records are case-independent. Exim always looks them up
6639 in lower case. Some resolvers return domain names in exactly the case they
6640 appear in the zone file, that is, they may contain uppercase letters. Not
6641 all resolvers do this - some return always lower case. Exim was treating a
6642 change of case by a resolver as a change of domain, similar to a widening
6643 of a domain abbreviation. This triggered its re-routing code and so it was
6644 trying to route what was effectively the same domain again. This normally
6645 caused routing to fail (because the router wouldn't handle the domain
6646 twice). Now Exim checks for this case specially, and just changes the
6647 casing of the domain that it ultimately uses when it transmits the message
6650 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6653 50. If a filter generated a file delivery with a non-absolute name (possible if
6654 no home directory exists for the router), the forbid_file option was not
6657 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6658 the existing equality matching.
6660 52. Exim was using ints instead of ino_t variables in some places where it was
6661 dealing with inode numbers.
6663 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6664 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6665 called TMPDIR, and if it finds it is different, it changes its value.
6667 54. The smtp_printf() function is now made available to local_scan() so
6668 additional output lines can be written before returning. There is also an
6669 smtp_fflush() function to enable the detection of a dropped connection.
6670 The variables smtp_input and smtp_batched_input are exported to
6673 55. Changed the default runtime configuration: the message "Unknown user"
6674 has been removed from the ACL, and instead placed on the localuser router,
6675 using the cannot_route_message feature. This means that any verification
6676 failures that generate their own messages won't get overridden. Similarly,
6677 the "Unrouteable address" message that was in the ACL for unverifiable
6678 relay addresses has also been removed.
6680 56. Added hosts_avoid_esmtp to the smtp transport.
6682 57. The exicyclog script was not checking for the esoteric option
6683 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6684 will work only if exicyclog is run under the appropriate euid.
6686 58. Following a discussion on the list, the rules by which Exim recognises line
6687 endings on incoming messages have been changed. The -dropcr and drop_cr
6688 options are now no-ops, retained only for backwards compatibility. The
6689 following line terminators are recognized: LF CRLF CR. However, special
6690 processing applies to CR:
6692 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6693 nor a local message in the state where . is a terminator.
6695 (ii) If a bare CR is encountered in a header line, an extra space is added
6696 after the line terminator so as not to end the header. The reasoning
6697 behind this is that bare CRs in header lines are most likely either
6698 to be mistakes, or people trying to play silly games.
6700 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6701 was being incorrectly given as 18 bytes larger than it should have been.
6702 This is a VOB (very old bug).
6704 60. This may never have affected anything current, but just in case it has:
6705 When the local host is found other than at the start of a list of hosts,
6706 the local host, those with the same MX, and any that follow, are discarded.
6707 When the list in question was part of a longer list of hosts, the following
6708 hosts (not currently being processed) were also being discarded. This no
6709 longer happens. I'm not sure if this situation could ever has previously
6712 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6715 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6716 header. This is something that is recommended in a new Internet Draft, and
6717 is something that is documented as being done by Sendmail. There are two
6718 possible values. For messages generated by the autoreply transport, Exim
6721 Auto-Submitted: auto-replied
6723 whereas for all other generated messages (e.g. bounces) it adds
6725 Auto-Submitted: auto-generated
6727 63. The "personal" condition in filters now includes a test for the
6728 Auto-Submitted: header. If it contains the string "auto-" the message it
6729 not considered personal.
6731 64. Added rcpt_include_affixes as a generic transport option.
6733 65. Added queue_only_override (default true).
6735 66. Added the syslog_duplication option.
6737 67. If what should have been the first header line of a message consisted of
6738 a space followed by a colon, Exim was mis-interpreting it as a header line.
6739 It isn't of course - it is syntactically invalid and should therefore be
6740 treated as the start of the message body. The misbehaviour could have
6741 caused a number of strange effects, including loss of data in subsequent
6742 header lines, and spool format errors.
6744 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6745 client host had authenticated. This control can now be exercised by an ACL
6746 for more flexibility.
6748 69. By default, callouts do not happen when testing with -bh. There is now a
6749 variant, -bhc, which does actually run the callout code, including
6750 consulting and updating the callout cache.
6752 70. Added support for saslauthd authentication, courtesy of Alexander
6755 71. If statvfs() failed on the spool or log directories while checking their
6756 size for availability, Exim confusingly gave the error "space shortage".
6757 Furthermore, in debugging mode it crashed with a floating point exception.
6758 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6759 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6760 serious problem, Exim now writes to the main and panic logs when this
6761 happens, with details of the failure. It then refuses to accept the
6762 incoming message, giving the message "spool directory problem" or "log
6763 directory problem" with a 421 code for SMTP messages.
6765 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6766 0, 1, and 2 exist, because some OS complain for execs without them (see
6767 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6768 descriptors. However, the code omitted to check that the open succeeded,
6769 causing mysterious errors if for some reason the permissions on /dev/null
6770 got screwed. Now Exim writes a message to the main and panic logs, and
6771 bombs out if it can't open /dev/null.
6773 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6774 interact so that it is all more flexible. It is supposed to remain
6775 backwards compatible. Also added extra_local_interfaces.
6777 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6778 to bomb out with an assertion failure - to the client this appears as a
6779 connection drop. This problem occurs in the part of the code that was taken
6780 from the Samba project. Fortunately, the assertion is in a very simple
6781 function, so I have fixed this by reproducing the function inline in the
6782 one place where it is called, and arranging for authentication to fail
6783 instead of killing the process with assert().
6785 75. The SPA client code was not working when the server requested OEM rather
6786 than Unicode encoding.
6788 76. Added code to make require_files with a specific uid setting more usable in
6789 the case where statting the file as root fails - usually a non-root-mounted
6790 NFS file system. When this happens and the failure is EACCES, Exim now
6791 forks a subprocess and does the per-uid checking as the relevant uid.
6793 77. Added process_log_path.
6795 78. If log_file_path was not explicitly set, a setting of check_log_space or
6796 check_log_inodes was ignored.
6798 79. If a space check for the spool or log partitions fails, the incident is now
6799 logged. Of course, in the latter case the data may get lost...
6801 80. Added the %p formatting code to string_format() so that it can be used to
6802 print addresses in debug_print(). Adjusted all the address printing in the
6803 debugging in store.c to use %p rather than %d.
6805 81. There was a concern that a line of code in smtp_in.c could overflow a
6806 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6807 initially expressed, the concern was not well-founded, because trailing
6808 spaces are removed early. However, if the trailing spaces were followed by
6809 a NULL, they did not get removed, so the overflow was possible. Two fixes
6812 (a) I re-wrote the offending code in a cleaner fashion.
6813 (b) If an incoming SMTP command contains a NULL character, it is rejected
6816 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6817 runs initgroups(), so that if the Exim user is in any additional groups,
6818 they will be used during message reception.
6824 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob