1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
8 Exim version 4.89+fixes
9 -----------------------
10 Cherry-Picked from the master development branch
11 -------------------------------------------------
13 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
15 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
16 Disable the session-cache too, which might reduce our load. Since we
17 currrectly use a new context for every connection, both as server and
18 client, there is no benefit for these.
19 GnuTLS appears to not support tickets server-side by default (we don't
20 call gnutls_session_ticket_enable_server()) but client side is enabled
21 by default on recent versions (3.1.3 +) unless the PFS priority string
24 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
25 the check for any unsuccessful recipients did not notice the limit, and
26 erroneously found still-pending ones.
32 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
33 than -2003 did; needs libidn2 in addition to libidn.
35 JH/02 The path option on a pipe transport is now expanded before use.
37 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
38 Patch provided by "Björn", documentation fix added too.
40 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
41 missing a wire-to-host endian conversion.
43 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
44 close after a BDAT command line could be taken as a following command,
45 giving a synch failure. Fix by only checking for synch immediately
46 before acknowledging the chunk.
48 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
49 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
50 macro. Patches provided by Josh Soref.
52 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
53 Previously we did not; the RFC seems ambiguous and VRFY is not listed
54 by IANA as a service extension. However, John Klensin suggests that we
57 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
58 the dkim code may be unix-mode line endings rather than smtp wire-format
59 CRLF, so prepend a CR to any bare LF.
61 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
62 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
64 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
65 the first were themselves being wrongly included in the feed into dkim
66 processing; with most chunk sizes in use this resulted in an incorrect
67 body hash calculated value.
69 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
70 DKIM signature block, for verification. Although advised against by
71 standards it is specifically not ruled illegal.
73 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
75 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
76 missing a body hash (the bh= tag).
78 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
79 It seems that HAProxy sends the Proxy Protocol information in clear and
80 only then does a TLS startup, so do the same.
82 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
83 TCP connections (such as for Spamd) unless the daemon successfully set
84 Fast Open mode on its listening sockets. This fixes breakage seen on
85 too-old kernels or those not configured for Fast Open, at the cost of
86 requiring both directions being enabled for TFO, and TFO never being used
87 by non-daemon-related Exim processes.
89 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
90 endings, at least on the first header line. Try to canonify any that get
91 past that check, despite the cost.
93 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
94 now limited to an arbitrary five deep, while parsing addresses with the
95 strip_excess_angle_brackets option enabled.
97 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
98 instead leave the unprompted TLS handshake in socket buffer for the
99 TLS library to consume.
101 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
103 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
105 JH/16 Drop variables when they go out of scope. Memory management drops a whole
106 region in one operation, for speed, and this leaves assigned pointers
107 dangling. Add checks run only under the testsuite which checks all
108 variables at a store-reset and panics on a dangling pointer; add code
109 explicitly nulling out all the variables discovered. Fixes one known
110 bug: a transport crash, where a dangling pointer for $sending_ip_address
111 originally assigned in a verify callout, is re-used.
113 PP/06 Drop '.' from @INC in various Perl scripts.
115 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
117 PP/08 Reduce a number of compilation warnings under clang; building with
118 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
119 should be warning-free.
121 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
123 HS/01 Fix portability problems introduced by PP/08 for platforms where
124 realloc(NULL) is not equivalent to malloc() [SunOS et al].
126 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
127 chunk. This allows us to accept broken chunked messages. We need a more
128 general solution here.
130 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
131 already-broken messages in the queue.
133 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
135 JH/19 Fix reference counting bug in routing-generated-address tracking.
141 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
142 supports it and a size is available (ie. the sending peer gave us one).
144 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
145 years of being deprecated). The replacements are the ACLs
146 acl_smtp_mime and acl_not_smtp_mime.
148 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
149 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
150 or even an in-clear connection were permitted. Now, if the host lookup
151 was dnssec and dane was requested then the host is only used if the
152 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
153 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
154 if one fails this test.
155 This means that a poorly-configured remote DNS will make it incommunicado;
156 but it protects against a DNS-interception attack on it.
158 JH/04 Bug 1810: make continued-use of an open smtp transport connection
159 non-noisy when a race steals the message being considered.
161 JH/05 If main configuration option tls_certificate is unset, generate a
162 self-signed certificate for inbound TLS connections.
164 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
165 in rewrites and routers.
167 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
168 and logged a warning sing 4.83; now they are a configuration file error.
170 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
171 (lacking @domain). Apply the same qualification processing as RCPT.
173 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
175 JH/10 Support ${sha256:} applied to a string (as well as the previous
178 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
179 a cutthrough deliver is pending, as we always want to make a connection.
180 This also avoids re-routing the message when later placing the cutthrough
181 connection after a verify cache hit.
182 Do not update it with the verify result either.
184 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
185 when routing results in more than one destination address.
187 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
188 signing (which inhibits the cutthrough capability). Previously only
189 the presence of an option was tested; now an expansion evaluating as
190 empty is permissible (obviously it should depend only on data available
191 when the cutthrough connection is made).
193 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
194 the relevant preceding SMTP command did not note the pipelining mode.
196 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
197 Previously they were not counted.
199 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
200 as one having no matching records. Previously we deferred the message
201 that needed the lookup.
203 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
204 distinguished as "(=".
206 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
207 for missing MX records. Previously it only worked for missing A records.
209 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
211 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
212 after the data-go-ahead and data-ack. Patch from Jason Betts.
214 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
215 even for a "none" policy. Patch from Tony Meyer.
217 JH/22 Fix continued use of a connection for further deliveries. If a port was
218 specified by a router, it must also match for the delivery to be
221 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
222 When one of the recipients of a message was unsuitable for the connection
223 (has no matching addresses), we lost track of needing to mark it
224 deferred. As a result mail would be lost.
226 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
228 JH/25 Decoding ACL controls is now done using a binary search; the source code
229 takes up less space and should be simpler to maintain. Merge the ACL
230 condition decode tables also, with similar effect.
232 JH/26 Fix problem with one_time used on a redirect router which returned the
233 parent address unchanged. A retry would see the parent address marked as
234 delivered, so not attempt the (identical) child. As a result mail would
237 JH/27 Fix a possible security hole, wherein a process operating with the Exim
238 UID can gain a root shell. Credit to http://www.halfdog.net/ for
239 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
242 JH/28 Enable {spool,log} filesystem space and inode checks as default.
243 Main config options check_{log,spool}_{inodes,space} are now
244 100 inodes, 10MB unless set otherwise in the configuration.
246 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
247 Previously it only applied to the main-section connection policy
250 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
252 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
253 by me. Added RFC7919 DH primes as an alternative.
255 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
256 are not in the system include path.
258 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
259 GnuTLS, when a session startup failed (eg because the client disconnected)
260 Exim did stdio operations after fclose. This was exposed by a recent
261 change which nulled out the file handle after the fclose.
263 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
264 signed directly by the cert-signing cert, rather than an intermediate
265 OCSP-signing cert. This is the model used by LetsEncrypt.
267 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
269 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
270 an incoming connection.
272 HS/02 Bug 1802: Do not half-close the connection after sending a request
275 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
276 fallback to "prime256v1".
278 JH/34 SECURITY: Use proper copy of DATA command in error message.
279 Could leak key material. Remotely exploitable. CVE-2016-9963.
285 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
286 and 3.4.4 - once the server is enabled to respond to an OCSP request
287 it does even when not requested, resulting in a stapling non-aware
288 client dropping the TLS connection.
290 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
291 support variable-length bit vectors. No functional change.
293 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
294 The I= interface field on outgoing lines is now after the H= remote
295 host field, same as incoming lines. There is a separate
296 outgoing_interface log selector which allows you to disable the
299 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
300 If not running log_selector +smtp_connection the mainlog would be held
301 open indefinitely after a "too many connections" event, including to a
302 deleted file after a log rotate. Leave the per net connection logging
303 leaving it open for efficiency as that will be quickly detected by the
304 check on the next write.
306 HS/01 Bug 1671: Fix post transport crash.
307 Processing the wait-<transport> messages could crash the delivery
308 process if the message IDs didn't exist for some reason. When
309 using 'split_spool_directory=yes' the construction of the spool
310 file name failed already, exposing the same netto behaviour.
312 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
313 mime_regex ACL conditions.
315 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
316 to DSN fail messages (bounces): remote IP, remote greeting, remote response
317 to HELO, local diagnostic string.
319 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
320 log line to debug. Even when configured with a tls authenticator many
321 client connections are expected to not authenticate in this way, so
322 an authenticate fail is not an error.
324 HS/02 Add the Exim version string to the process info. This way exiwhat
325 gives some more detail about the running daemon.
327 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
328 matter for fast-change records such as DNSBLs.
330 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
331 retry record, even if constant. There may be multiple transports with
332 different interface settings and the retry behaviour needs to be kept
335 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
337 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
339 JH/10 Bug 840: fix log_defer_output option of pipe transport
341 JH/11 Bug 830: use same host for all RCPTS of a message, even under
342 hosts_randomize. This matters a lot when combined with mua_wrapper.
344 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
345 ${quote_pgsql:<string>} operator.
347 JH/13 Bug 1708: avoid misaligned access in cached lookup.
349 JH/14 Change header file name for freeradius-client. Relevant if compiling
350 with Radius support; from the Gentoo tree and checked under Fedora.
352 JH/15 Bug 1712: Introduce $prdr_requested flag variable
354 JH/16 Bug 1714: Permit an empty string as expansion result for transport
355 option transport_filter, meaning no filtering.
357 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
359 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
360 defaults to "*" (all hosts). The variable is now available when not built
361 with TLS, default unset, mainly to enable keeping the testsuite sane.
362 If a server certificate is not supplied (via tls_certificate) an error is
363 logged, and clients will find TLS connections fail on startup. Presumably
364 they will retry in-clear.
365 Packagers of Exim are strongly encouraged to create a server certificate
366 at installation time.
368 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
369 with the $config_file variable.
371 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
372 in transport context, after the attempt, and per-recipient. The latter type
373 is per host attempted. The event data is the error message, and the errno
374 information encodes the lookup type (A vs. MX) used for the (first) host,
375 and the trailing two digits of the smtp 4xx response.
377 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
378 to write to mainlog (or rejectlog, paniclog) in the window between file
379 creation and permissions/ownership being changed. Particularly affects
380 installations where exicyclog is run as root, rather than exim user;
381 result is that the running daemon panics and dies.
383 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
385 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
386 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
387 "pri" and "weight". Note that the previous implicit priority given by the
388 list order is no longer honoured.
390 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
393 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
394 by defining SUPPORT_SOCKS.
396 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
397 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
398 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
399 variables are renamed to proxy_{local,external}_{address,port}.
401 JH/27 Move Internationalisation support from Experimental to mainline, enabled
402 for a build by defining SUPPORT_I18N
404 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
405 of the query string, and make ${quote_redis:} do that quoting.
407 JH/29 Move Events support from Experimental to mainline, enabled by default
408 and removable for a build by defining DISABLE_EVENT.
410 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
412 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
413 cached by the daemon.
415 JH/32 Move Redis support from Experimental to mainline, enabled for a build
416 by defining LOOKUP_REDIS. The libhiredis library is required.
418 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
419 keys are given for lookup.
421 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
422 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
423 only supported when built with TLS support. The PolarSSL SHA routines
424 are still used when the TLS library is too old for convenient support.
426 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
427 openssl_options), for security. OpenSSL forces this from version 1.1.0
428 server-side so match that on older versions.
430 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
431 allocation for $value could be released as the expansion processing
432 concluded, but leaving the global pointer active for it.
434 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
435 and to use the domains and local_parts ACL conditions.
437 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
438 incorrectly not doubled on cutthrough transmission, hence seen as a
439 body-termination at the receiving system - resulting in truncated mails.
440 Commonly the sender saw a TCP-level error, and retransmitted the message
441 via the normal store-and-forward channel. This could result in duplicates
442 received - but deduplicating mailstores were liable to retain only the
443 initial truncated version.
445 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
447 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
449 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
450 we're in there, support oversigning also; bug 1309.
452 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
454 HS/04 Add support for keep_environment and add_environment options.
456 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
457 either intentional arithmetic overflow during PRNG, or testing config-
460 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
461 delivery resulted in actual delivery. Cancel cutthrough before DATA
464 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
465 rejects a recipient: pass the reject to the originator.
467 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
468 Many were false-positives and ignorable, but it's worth fixing the
471 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
472 for the new environment-manipulation done at startup. Move the routines
473 from being local to tls.c to being global via the os.c file.
475 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
476 an extract embedded as result-arg for a map, the first arg for extract
477 is unavailable so we cannot tell if this is a numbered or keyed
478 extraction. Accept either.
484 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
487 JH/02 The smtp transport option "multi_domain" is now expanded.
489 JH/03 The smtp transport now requests PRDR by default, if the server offers
492 JH/04 Certificate name checking on server certificates, when exim is a client,
493 is now done by default. The transport option tls_verify_cert_hostnames
494 can be used to disable this per-host. The build option
495 EXPERIMENTAL_CERTNAMES is withdrawn.
497 JH/05 The value of the tls_verify_certificates smtp transport and main options
498 default to the word "system" to access the system default CA bundle.
499 For GnuTLS, only version 3.0.20 or later.
501 JH/06 Verification of the server certificate for a TLS connection is now tried
502 (but not required) by default. The verification status is now logged by
503 default, for both outbound TLS and client-certificate supplying inbound
506 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
509 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
510 Status Notification (bounce) messages are now MIME format per RFC 3464.
511 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
512 under the control of the dsn_advertise_hosts option, and routers may
513 have a dsn_lasthop option.
515 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
516 default, modifiable by a malware= option. The list separator for
517 the options can now be changed in the usual way. Bug 68.
519 JH/10 The smtp_receive_timeout main option is now expanded before use.
521 JH/11 The incoming_interface log option now also enables logging of the
522 local interface on delivery outgoing connections.
524 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
525 if the interface and destination host and port all match.
527 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
530 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
531 Patch from Andrew Lewis.
533 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
534 now supports optional time-restrictions, weighting, and priority
535 modifiers per server. Patch originally by <rommer@active.by>.
537 JH/16 The spamd_address main option now supports a mixed list of local
538 and remote servers. Remote servers can be IPv6 addresses, and
539 specify a port-range.
541 JH/17 Bug 68: The spamd_address main option now supports an optional
542 timeout value per server.
544 JH/18 Bug 1581: Router and transport options headers_add/remove can
545 now have the list separator specified.
547 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
550 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
553 JH/21 Support for the A6 type of dns record is withdrawn.
555 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
556 rather than the verbs used.
558 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
559 from 255 to 1024 chars.
561 JH/24 Verification callouts now attempt to use TLS by default.
563 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
564 are generic router options now. The defaults didn't change.
566 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
567 Original patch from Alexander Shikoff, worked over by JH.
569 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
570 files if ZCAT_COMMAND is not executable.
572 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
574 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
576 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
577 Normally benign, it bites when the pair was led to by a CNAME;
578 modern usage is to not canonicalize the domain to a CNAME target
579 (and we were inconsistent anyway for A-only vs AAAA+A).
581 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
583 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
584 when evaluating $sender_host_dnssec.
586 JH/31 Check the HELO verification lookup for DNSSEC, adding new
587 $sender_helo_dnssec variable.
589 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
591 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
593 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
595 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
596 documented as working, but never had. Support all but $spam_report.
598 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
599 added for tls authenticator.
601 HS/03 Add perl_taintmode main config option
607 TL/01 When running the test suite, the README says that variables such as
608 no_msglog_check are global and can be placed anywhere in a specific
609 test's script, however it was observed that placement needed to be near
610 the beginning for it to behave that way. Changed the runtest perl
611 script to read through the entire script once to detect and set these
612 variables, reset to the beginning of the script, and then run through
613 the script parsing/test process like normal.
615 TL/02 The BSD's have an arc4random API. One of the functions to induce
616 adding randomness was arc4random_stir(), but it has been removed in
617 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
618 function when detected.
620 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
621 cause callback expansion.
623 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
624 syntax errors in an expansion can be treated as a string instead of
625 logging or causing an error, due to the internal use of bool_lax
626 instead of bool when processing it.
628 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
629 server certificates when making smtp deliveries.
631 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
633 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
635 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
637 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
638 Merged patch from Sebastian Wiedenroth.
640 JH/05 Fix results-pipe from transport process. Several recipients, combined
641 with certificate use, exposed issues where response data items split
642 over buffer boundaries were not parsed properly. This eventually
643 resulted in duplicates being sent. This issue only became common enough
644 to notice due to the introduction of connection certificate information,
645 the item size being so much larger. Found and fixed by Wolfgang Breyha.
647 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
648 size buffer was used, resulting in syntax errors when an expansion
651 JH/07 Add support for directories of certificates when compiled with a GnuTLS
652 version 3.3.6 or later.
654 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
655 is EXPERIMENTAL_EVENT, the main-configuration and transport options
656 both become "event_action", the variables become $event_name, $event_data
657 and $event_defer_errno. There is a new variable $verify_mode, usable in
658 routers, transports and related events. The tls:cert event is now also
659 raised for inbound connections, if the main configuration event_action
662 TL/06 In test suite, disable OCSP for old versions of openssl which contained
663 early OCSP support, but no stapling (appears to be less than 1.0.0).
665 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
666 server certificate names available under the smtp transport option
667 "tls_verify_cert_hostname" now do not permit multi-component wildcard
670 JH/10 Time-related extraction expansions from certificates now use the main
671 option "timezone" setting for output formatting, and are consistent
672 between OpenSSL and GnuTLS compilations. Bug 1541.
674 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
675 encoded parameter in the incoming message. Bug 1558.
677 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
678 include certificate info, eximon was claiming there were spoolfile
681 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
683 JH/14 Log delivery-related information more consistently, using the sequence
684 "H=<name> [<ip>]" wherever possible.
686 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
687 are problematic for Debian distribution, omit them from the release
690 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
692 JH/16 Fix string representation of time values on 64bit time_t architectures.
695 JH/17 Fix a null-indirection in certextract expansions when a nondefault
696 output list separator was used.
701 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
702 checkers that were complaining about end of non-void function with no
705 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
706 This was a regression introduced in 4.83 by another bugfix.
708 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
710 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
711 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
717 TF/01 Correctly close the server side of TLS when forking for delivery.
719 When a message was received over SMTP with TLS, Exim failed to clear up
720 the incoming connection properly after forking off the child process to
721 deliver the message. In some situations the subsequent outgoing
722 delivery connection happened to have the same fd number as the incoming
723 connection previously had. Exim would try to use TLS and fail, logging
724 a "Bad file descriptor" error.
726 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
727 utilities have not been installed.
729 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
730 temporary space as the ACL may create new global variables.
732 TL/01 LDAP support uses per connection or global context settings, depending
733 upon the detected version of the libraries at build time.
735 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
736 to extract and use the src ip:port in logging and expansions as if it
737 were a direct connection from the outside internet. PPv2 support was
738 updated based on HAProxy spec change in May 2014.
740 JH/02 Add ${listextract {number}{list}{success}{fail}}.
742 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
743 Properly escape header and check for NULL return.
745 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
748 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
750 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
751 characters in header names, implemented as a verify condition.
752 Contributed by Michael Fischer v. Mollard.
754 TL/05 Rename SPF condition results err_perm and err_temp to standardized
755 results permerror and temperror. Previous values are deprecated but
756 still accepted. In a future release, err_perm and err_temp will be
757 completely removed, which will be a backward incompatibility if the
758 ACL tests for either of these two old results. Patch contributed by
759 user bes-internal on the mailing list.
761 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
763 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
764 selectors, in both main and reject logs.
766 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
769 JH/07 Add malware type "sock" for talking to simple daemon.
771 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
773 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
774 routers/transports under cutthrough routing.
776 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
777 numbers. Touch up "bool" conditional to keep the same definition.
779 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
781 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
783 JH/12 Expand items in router/transport headers_add or headers_remove lists
784 individually rather than the list as a whole. Bug 1452.
786 Required for reasonable handling of multiple headers_ options when
787 they may be empty; requires that headers_remove items with embedded
788 colons must have them doubled (or the list-separator changed).
790 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
791 view the policy declared in the DMARC record. Currently, $dmarc_status
792 is a combined value of both the record presence and the result of the
795 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
797 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
798 dnslookup router and the smtp transport (applying to the forward
801 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
802 of ldap servers used for a specific lookup. Patch provided by Heiko
805 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
806 New variable $lookup_dnssec_authenticated for observability.
808 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
809 Patch submitted by Lars Timman.
811 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
813 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
814 Requires trusted mode and valid format message id, aborts otherwise.
815 Patch contributed by Heiko Schlichting.
817 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
818 certextract with support for various fields. Bug 1358.
820 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
821 is requested by default, modifiable by smtp transport option
824 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
825 operate on certificate variables to give certificate fingerprints
826 Also new ${sha256:cert_variable}.
828 JH/23 The PRDR feature is moved from being Experimental into the mainline.
830 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
831 Christian Aistleitner.
833 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
835 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
836 file. Patch from Wolfgang Breyha.
838 JH/25 Expand the coverage of the delivery $host and $host_address to
839 client authenticators run in verify callout. Bug 1476.
841 JH/26 Port service names are now accepted for tls_on_connect_ports, to
842 align with daemon_smtp_ports. Bug 72.
844 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
845 support and error reporting did not work properly.
847 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
848 and is readable. Patch from Andrew Colin Kissa.
850 TL/14 Enhance documentation of ${run expansion and how it parses the
851 commandline after expansion, particularly in the case when an
852 unquoted variable expansion results in an empty value.
854 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
856 PP/02 Fix internal collision of T_APL on systems which support RFC3123
857 by renaming away from it. Addresses GH issue 15, reported by
860 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
862 TL/15 SECURITY: prevent double expansion in math comparison functions
863 (can expand unsanitized data). Not remotely exploitable.
870 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
872 PP/02 Make -n do something, by making it not do something.
873 When combined with -bP, the name of an option is not output.
875 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
878 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
879 $sender_host_name and config options to manage this, and basic check
882 PP/05 DSCP support for outbound connections and control modifier for inbound.
884 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
885 (Only plugin which currently uses this is kerberos4, which nobody should
886 be using, but we should make it available and other future plugins might
887 conceivably use it, even though it would break NAT; stuff *should* be
888 using channel bindings instead).
890 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
891 name; added for Sendmail compatibility; requires admin caller.
892 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
893 just ignore it); requires trusted caller.
894 Also parse but ignore: -Ac -Am -X<logfile>
897 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
899 TL/02 Add +smtp_confirmation as a default logging option.
901 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
902 Patch by Magnus Holmgren from 2007-02-20.
904 TL/04 Bugzilla 1281 - Spec typo.
905 Bugzilla 1283 - Spec typo.
906 Bugzilla 1290 - Spec grammar fixes.
908 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
910 TL/06 Add Experimental DMARC support using libopendmarc libraries.
912 TL/07 Fix an out of order global option causing a segfault. Reported to dev
913 mailing list by by Dmitry Isaikin.
915 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
917 JH/02 Support "G" suffix to numbers in ${if comparisons.
919 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
921 NM/01 Bugzilla 1197 - Spec typo
922 Bugzilla 1196 - Spec examples corrections
924 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
926 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
927 gnutls_enable_pkcs11, but renamed to more accurately indicate its
930 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
931 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
933 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
934 "acl {{name}{arg}...}", and optional args on acl condition
937 JH/05 Permit multiple router/transport headers_add/remove lines.
939 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
941 JH/07 Avoid using a waiting database for a single-message-only transport.
942 Performance patch from Paul Fisher. Bugzilla 1262.
944 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
947 JH/09 Add $headers_added variable, with content from use of ACL modifier
948 add_header (but not yet added to the message). Bugzilla 199.
950 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
951 Pulled from Bugzilla 817 by Wolfgang Breyha.
953 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
955 (nb: this is the same fix as in Exim 4.80.1)
957 JH/11 Add A= logging on delivery lines, and a client_set_id option on
960 JH/12 Add optional authenticated_sender logging to A= and a log_selector
963 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
965 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
966 advertise SMTP AUTH mechanism to us, instead of a generic
967 protocol violation error. Also, make Exim more robust to bad
968 data from the Dovecot auth socket.
970 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
972 When a queue runner is handling a message, Exim first routes the
973 recipient addresses, during which it prunes them based on the retry
974 hints database. After that it attempts to deliver the message to
975 any remaining recipients. It then updates the hints database using
978 So if a recipient address works intermittently, it can get repeatedly
979 deferred at routing time. The retry hints record remains fresh so the
980 address never reaches the final cutoff time.
982 This is a fairly common occurrence when a user is bumping up against
983 their storage quota. Exim had some logic in its local delivery code
984 to deal with this. However it did not apply to per-recipient defers
985 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
987 This change adds a proper retry rule check during routing so that the
988 final cutoff time is checked against the message's age. We only do
989 this check if there is an address retry record and there is not a
990 domain retry record; this implies that previous attempts to handle
991 the address had the retry_use_local_parts option turned on. We use
992 this as an approximation for the destination being like a local
993 delivery, as in LMTP.
995 I suspect this new check makes the old local delivery cutoff check
996 redundant, but I have not verified this so I left the code in place.
998 TF/02 Correct gecos expansion when From: is a prefix of the username.
1000 Test 0254 submits a message to Exim with the header
1004 When I ran the test suite under the user fanf2, Exim expanded
1005 the header to contain my full name, whereas it should have added
1006 a Resent-Sender: header. It erroneously treats any prefix of the
1007 username as equal to the username.
1009 This change corrects that bug.
1011 GF/01 DCC debug and logging tidyup
1012 Error conditions log to paniclog rather than rejectlog.
1013 Debug lines prefixed by "DCC: " to remove any ambiguity.
1015 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1017 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1018 Bug spotted by Jeremy Harris; was flawed since initial commit.
1019 Would have resulted in OCSP responses post-SNI triggering an Exim
1020 NULL dereference and crash.
1022 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1024 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1025 Bug detection, analysis and fix by Samuel Thibault.
1026 Bugzilla 1331, Debian bug #698092.
1028 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1030 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1031 Server implementation by Todd Lyons, client by JH.
1032 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1033 config variable "prdr_enable" controls whether the server
1034 advertises the facility. If the client requests PRDR a new
1035 acl_data_smtp_prdr ACL is called once for each recipient, after
1036 the body content is received and before the acl_smtp_data ACL.
1037 The client is controlled by both of: a hosts_try_prdr option
1038 on the smtp transport, and the server advertisement.
1039 Default client logging of deliveries and rejections involving
1040 PRDR are flagged with the string "PRDR".
1042 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1043 fclose(). Diagnosis by Todd Lyons.
1045 PP/17 Update configure.default to handle IPv6 localhost better.
1046 Patch by Alain Williams (plus minor tweaks).
1049 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1050 This is now consistent with GnuTLS, and is now documented: the
1051 previous undocumented portable approach to treating the option as
1052 unset was to force an expansion failure. That still works, and
1053 an empty string is now equivalent.
1055 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1056 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1057 not performing validation itself.
1059 PP/20 Added force_command boolean option to pipe transport.
1060 Patch from Nick Koston, of cPanel Inc.
1062 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1065 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1067 PP/21 Fix eximon continuous updating with timestamped log-files.
1068 Broken in a format-string cleanup in 4.80, missed when I repaired the
1069 other false fix of the same issue.
1070 Report and fix from Heiko Schlichting.
1073 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1074 Report from Prashanth Katuri.
1076 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1077 It's SecureTransport, so affects any MacOS clients which use the
1078 system-integrated TLS libraries, including email clients.
1080 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1081 using a MIME ACL for non-SMTP local injection.
1082 Report and assistance in diagnosis by Warren Baker.
1084 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1086 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1088 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1089 last id that failed so it may be referenced in subsequent ACL's.
1091 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1094 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1095 ldap library initialization, allowing self-signed CA's to be
1096 used. Also properly sets require_cert option later in code by
1097 using NULL (global ldap config) instead of ldap handle (per
1098 session). Bug diagnosis and testing by alxgomz.
1100 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1101 the src/util/ subdirectory.
1103 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1104 renamed to Transport Post Delivery Action by Jeremy Harris, as
1107 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1108 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1109 redis_servers = needs to be configured which will be used by the redis
1110 lookup. Patch from Warren Baker, of The Packet Hub.
1112 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1114 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1115 hostname or reverse DNS when processing a host list. Used suggestions
1116 from multiple comments on this bug.
1118 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1120 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1121 Missed a few lines, added it to make the runtest require no keyboard
1124 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1125 contains upper case chars. Make router use caseful_local_part.
1127 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1128 support when GnuTLS has been built with p11-kit.
1134 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1136 This, or similar/improved, will also be change PP/11 of 4.82.
1142 PP/01 Handle short writes when writing local log-files.
1143 In practice, only affects FreeBSD (8 onwards).
1144 Bugzilla 1053, with thanks to Dmitry Isaikin.
1146 NM/01 Bugzilla 949 - Documentation tweak
1148 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1151 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1153 PP/02 Implemented gsasl authenticator.
1155 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1157 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1158 `pkg-config foo` for cflags/libs.
1160 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1161 with rest of GSASL and with heimdal_gssapi.
1163 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1164 `pkg-config foo` for cflags/libs for the TLS implementation.
1166 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1167 properties get this fed in as external SSF. A number of robustness
1168 and debugging improvements to the cyrus_sasl authenticator.
1170 PP/08 cyrus_sasl server now expands the server_realm option.
1172 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1173 Patch by Jeremy Harris.
1175 PP/10 Added dbmjz lookup type.
1177 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1179 PP/12 MAIL args handles TAB as well as SP, for better interop with
1180 non-compliant senders.
1181 Analysis and variant patch by Todd Lyons.
1183 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1184 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1185 Patch from Dirk Mueller <dmueller@suse.com>
1187 PP/13 tls_peerdn now print-escaped for spool files.
1188 Observed some $tls_peerdn in wild which contained \n, which resulted
1189 in spool file corruption.
1191 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1192 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1193 or write after TLS renegotiation, which otherwise led to messages
1196 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1197 as a tracking header (ie: a signed header comes before the signature).
1198 Patch from Wolfgang Breyha.
1200 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1201 comma-sep list; embedded commas doubled.
1203 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1205 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1207 Report and patch from Dmitry Banschikov.
1209 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1210 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1211 failures. We appear to now support TLS1.1+ with Exim.
1213 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1214 lets Exim select keys and certificates based upon TLS SNI from client.
1215 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1216 before an outbound SMTP session. New log_selector, +tls_sni.
1218 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1219 NULL dereference. Report and patch from Alun Jones.
1221 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1222 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1223 Not seeing resolver debug output on NetBSD, but suspect this is a
1224 resolver implementation change.
1226 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1227 Left warnings. Added "eximon gdb" invocation mode.
1229 PP/21 Defaulting "accept_8bitmime" to true, not false.
1231 PP/22 Added -bw for inetd wait mode support.
1233 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1234 locate the relevant includes and libraries. Made this the default.
1236 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1237 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1239 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1240 This may cause build issues on older platforms.
1242 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1243 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1244 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1245 Added SNI support via GnuTLS too.
1246 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1248 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1250 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1251 Applied second patch from Janne, implementing suggestion to default
1252 multiple-strings-in-record handling to match SPF spec.
1254 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1256 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1257 read-only, out of scope).
1258 Patch from Wolfgang Breyha, report from Stuart Northfield.
1260 PP/29 Fix three issues highlighted by clang analyser static analysis.
1261 Only crash-plausible issue would require the Cambridge-specific
1262 iplookup router and a misconfiguration.
1263 Report from Marcin Mirosław.
1265 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1267 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1268 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1269 As part of this, removing so much warning spew let me fix some minor
1270 real issues in debug logging.
1272 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1273 assignment on my part. Fixed.
1275 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1276 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1277 Janne Snabb (who went above and beyond: thank you).
1279 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1280 string otherwise requires a connection and a bunch more work and it's
1281 relatively easy to get wrong. Should also expose TLS library linkage
1284 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1285 64-bit ${eval} (JH/03).
1287 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1288 GNU libc to support some of the 64-bit stuff, should not lead to
1289 conflicts. Defined before os.h is pulled in, so if a given platform
1290 needs to override this, it can.
1292 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1293 protection layer was required, which is not implemented.
1294 Bugzilla 1254, patch from Wolfgang Breyha.
1296 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1297 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1298 tls_dhparam take prime identifiers. Also unbreak combination of
1299 OpenSSL+DH_params+TLSSNI.
1301 PP/39 Disable SSLv2 by default in OpenSSL support.
1307 PP/01 Solaris build fix for Oracle's LDAP libraries.
1308 Bugzilla 1109, patch from Stephen Usher.
1310 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1312 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1315 TF/02 Fix a couple more cases where we did not log the error message
1316 when unlink() failed. See also change 4.74-TF/03.
1318 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1319 lock up or crash if it happened to be inside a call to libc when it
1320 got a SIGUSR1 from exiwhat.
1322 The SIGUSR1 handler appends the current process status to the process
1323 log which is later printed by exiwhat. It used to use the general
1324 purpose logging code to do this, but several functions it calls are
1325 not safe for signals.
1327 The new output code in the SIGUSR1 handler is specific to the process
1328 log, and simple enough that it's easy to inspect for signal safety.
1329 Removing some special cases also simplifies the general logging code.
1330 Removing the spurious timestamps from the process log simplifies
1333 TF/04 Improved ratelimit ACL condition.
1335 The /noupdate option has been deprecated in favour of /readonly which
1336 has clearer semantics. The /leaky, /strict, and /readonly update modes
1337 are mutually exclusive. The update mode is no longer included in the
1338 database key; it just determines when the database is updated. (This
1339 means that when you upgrade Exim will forget old rate measurements.)
1341 Exim now checks that the per_* options are used with an update mode that
1342 makes sense for the current ACL. For example, when Exim is processing a
1343 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1344 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1345 must specify per_mail/readonly. If you omit the update mode it defaults to
1346 /leaky where that makes sense (as before) or /readonly where required.
1348 The /noupdate option is now undocumented but still supported for
1349 backwards compatibility. It is equivalent to /readonly except that in
1350 ACLs where /readonly is required you may specify /leaky/noupdate or
1351 /strict/noupdate which are treated the same as /readonly.
1353 A useful new feature is the /count= option. This is a generalization
1354 of the per_byte option, so that you can measure the throughput of other
1355 aggregate values. For example, the per_byte option is now equivalent
1356 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1358 The per_rcpt option has been generalized using the /count= mechanism
1359 (though it's more complicated than the per_byte equivalence). When it is
1360 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1361 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1362 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1363 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1364 Note that using per_rcpt with a non-readonly update mode in more than
1365 one ACL will cause the recipients to be double-counted. (The per_mail
1366 and per_byte options don't have this problem.)
1368 The handling of very low rates has changed slightly. If the computed rate
1369 is less than the event's count (usually one) then this event is the first
1370 after a long gap. In this case the rate is set to the same as this event's
1371 count, so that the first message of a spam run is counted properly.
1373 The major new feature is a mechanism for counting the rate of unique
1374 events. The new per_addr option counts the number of different
1375 recipients that someone has sent messages to in the last time period. It
1376 behaves like per_rcpt if all the recipient addresses are different, but
1377 duplicate recipient addresses do not increase the measured rate. Like
1378 the /count= option this is a general mechanism, so the per_addr option
1379 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1380 example, measure the rate that a client uses different sender addresses
1381 with the options per_mail/unique=$sender_address. There are further
1382 details in the main documentation.
1384 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1386 TF/06 Removed a few PCRE remnants.
1388 TF/07 Automatically extract Exim's version number from tags in the git
1389 repository when doing development or release builds.
1391 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1392 Bugzilla 879. Patch from Paul Fisher.
1394 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1395 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1398 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1400 PP/05 Variable $av_failed, true if the AV scanner deferred.
1401 Bugzilla 1078. Patch from John Horne.
1403 PP/06 Stop make process more reliably on build failure.
1404 Bugzilla 1087. Patch from Heiko Schlittermann.
1406 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1407 Bugzilla 1089. Patch from Heiko Schlittermann.
1409 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1410 Bugzilla 1131. Patch from Holger Weiß.
1412 PP/09 Handle IPv6 addresses with SPF.
1413 Bugzilla 860. Patch from Wolfgang Breyha.
1415 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1417 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1420 PP/11 match_* no longer expand right-hand-side by default.
1421 New compile-time build option, EXPAND_LISTMATCH_RHS.
1422 New expansion conditions, "inlist", "inlisti".
1424 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1426 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1428 PP/14 fix log_write() format string regression from TF/03.
1429 Bugzilla 1152. Patch from Dmitry Isaikin.
1435 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1437 PP/02 Harmonised TLS library version reporting; only show if debugging.
1438 Layout now matches that introduced for other libraries in 4.74 PP/03.
1440 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1442 PP/04 New "dns_use_edns0" global option.
1444 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1447 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1448 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1450 TK/01 Updated PolarSSL code to 0.14.2.
1451 Bugzilla 1097. Patch from Andreas Metzler.
1453 PP/07 Catch divide-by-zero in ${eval:...}.
1454 Fixes bugzilla 1102.
1456 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1459 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1460 format-string attack -- SECURITY: remote arbitrary code execution.
1462 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1463 time unintentionally subject to list matching rules, letting the header
1464 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1465 arbitrary string expansion). This allowed for information disclosure.
1467 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1468 INT_MIN/-1 -- value coerced to INT_MAX.
1474 NM/01 Workaround for PCRE version dependency in version reporting
1477 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1478 This fixes portability to compilers other than gcc, notably
1479 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1481 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1482 makefiles for portability to HP-UX and POSIX correctness.
1484 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1485 Also via indented variable definition in the Makefile.
1486 (Debugging by Oliver Heesakkers).
1488 PP/02 Restore caching of spamd results with expanded spamd_address.
1489 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1491 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1492 Improves build reliability. Fix from: Frank Elsner
1494 NM/02 Fix wide character breakage in the rfc2047 coding
1495 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1497 NM/03 Allow underscore in dnslist lookups
1498 Fixes bug 1026. Patch from Graeme Fowler
1500 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1501 Code patches from Adam Ciarcinski of NetBSD.
1503 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1506 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1507 is logged, to avoid truncation. Patch from John Horne.
1509 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1510 Patch from Jakob Hirsch.
1512 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1513 SQL string expansion failure details.
1514 Patch from Andrey Oktyabrski.
1516 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1517 Patch from Simon Arlott.
1519 PP/09 New lookups functionality failed to compile on old gcc which rejects
1520 extern declarations in function scope.
1521 Patch from Oliver Fleischmann
1523 PP/10 Use sig_atomic_t for flags set from signal handlers.
1524 Check getgroups() return and improve debugging.
1525 Fixed developed for diagnosis in bug 927 (which turned out to be
1528 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1529 Patch from Mark Zealey.
1531 PP/12 Bugzilla 1056: Improved spamd server selection.
1532 Patch from Mark Zealey.
1534 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1535 Based on patch from Heiko Schlittermann.
1537 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1538 Patch from Uwe Doering, sign-off by Michael Haardt.
1540 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1541 variable declaration deep within a block. Bug and patch from
1544 PP/15 lookups-Makefile IRIX compatibility coercion.
1546 PP/16 Make DISABLE_DKIM build knob functional.
1548 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1549 Patch by Simon Arlott
1551 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1552 variable argument macros. Our copy now differs from upstream.
1558 TF/01 Failure to get a lock on a hints database can have serious
1559 consequences so log it to the panic log.
1561 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1562 controlled using the smtp_confirmation log selector.
1564 TF/03 Include the error message when we fail to unlink a spool file.
1566 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1567 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1568 for maintaining out-of-tree patches for some time.
1570 PP/01 Bugzilla 139: Documentation and portability issues.
1571 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1572 Handle per-OS dynamic-module compilation flags.
1574 PP/02 Let /dev/null have normal permissions.
1575 The 4.73 fixes were a little too stringent and complained about the
1576 permissions on /dev/null. Exempt it from some checks.
1577 Reported by Andreas M. Kirchwitz.
1579 PP/03 Report version information for many libraries, including
1580 Exim version information for dynamically loaded libraries. Created
1581 version.h, now support a version extension string for distributors
1582 who patch heavily. Dynamic module ABI change.
1584 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1585 privilege escalation vulnerability whereby the Exim run-time user
1586 can cause root to append content of the attacker's choosing to
1589 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1592 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1593 If dropping privileges for untrusted macros, we disabled normal logging
1594 on the basis that it would fail; for the Exim run-time user, this is not
1595 the case, and it resulted in successful deliveries going unlogged.
1596 Fixed. Reported by Andreas Metzler.
1602 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1603 only prepend for the Resent-* case. Fixes regression introduced in
1604 Exim 4.70 by NM/22 for Bugzilla 607.
1606 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1607 increasing numbers of administrators be bitten by this.
1609 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1611 PP/03 Bugzilla 994: added openssl_options main configuration option.
1613 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1615 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1617 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1619 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1620 without a peer certificate, leading to a segfault because of an
1621 assumption that peers always have certificates. Be a little more
1622 paranoid. Problem reported by Martin Tscholak.
1624 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1625 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1626 NB: ClamAV planning to remove STREAM in "middle of 2010".
1627 CL also introduces -bmalware, various -d+acl logging additions and
1628 more caution in buffer sizes.
1630 PP/09 Implemented reverse_ip expansion operator.
1632 PP/10 Bugzilla 937: provide a "debug" ACL control.
1634 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1636 PP/12 Bugzilla 973: Implement --version.
1638 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1640 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1642 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1644 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1645 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1646 ignore trailing whitespace.
1648 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1650 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1653 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1654 Notification from Dr Andrew Aitchison.
1656 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1657 ExtendedDetectionInfo response format.
1658 Notification from John Horne.
1660 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1663 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1664 XSL and documented dependency on system catalogs, with examples of how
1667 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1670 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1671 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1672 configuration file which is writeable by the Exim user or group.
1674 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1675 of configuration files to cover files specified with the -C option if
1676 they are going to be used with root privileges, not just the default
1679 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1680 option (effectively making it always true).
1682 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1683 files to be used while preserving root privileges.
1685 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1686 that rogue child processes cannot use them.
1688 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1689 run-time user, instead of root.
1691 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1692 Exim run-time user without dropping privileges.
1694 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1695 result string, instead of calling string_vformat() twice with the same
1698 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1699 for other users. Others should always drop root privileges if they use
1700 -C on the command line, even for a whitelisted configure file.
1702 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1704 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1710 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1711 $data_path, and $header_path variables; fixed documentation bugs and
1714 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1715 exipick to access non-standard spools, including the "frozen" queue
1718 NM/01 Bugzilla 965: Support mysql stored procedures.
1719 Patch from Alain Williams
1721 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1723 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1724 Patch from Andreas Metzler
1726 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1727 Patch from Kirill Miazine
1729 NM/05 Bugzilla 671: Added umask to procmail example.
1731 JJ/03 installed exipick 20100323.0, fixing doc bug
1733 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1734 directory. Notification and patch from Dan Rosenberg.
1736 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1738 TK/02 Improve log output when DKIM signing operation fails.
1740 MH/01 Treat the transport option dkim_domain as a colon separated
1741 list, not as a single string, and sign the message with each element,
1742 omitting multiple occurences of the same signer.
1744 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1745 Bugzilla 985, 986. Patch by Simon Arlott
1747 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1748 Patch by Simon Arlott
1750 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1751 MBX locking. Notification from Dan Rosenberg.
1757 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1759 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1761 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1763 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1765 NM/04 Bugzilla 915: Flag broken perl installation during build.
1771 TK/01 Added patch by Johannes Berg that expands the main option
1772 "spamd_address" if it starts with a dollar sign.
1774 TK/02 Write list of recipients to X-Envelope-Sender header when building
1775 the mbox-format spool file for content scanning (suggested by Jakob
1778 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1779 (http://www.dcc-servers.net/) support via dccifd. Activated by
1780 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1782 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1783 by Mark Daniel Reidel <mr@df.eu>.
1785 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1786 When building exim an external PCRE library is now needed -
1787 PCRE is a system library on the majority of modern systems.
1788 See entry on PCRE_LIBS in EDITME file.
1790 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1791 conversation. Added nologin parameter to request.
1792 Patch contributed by Kirill Miazine.
1794 TF/01 Do not log submission mode rewrites if they do not change the address.
1796 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1798 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1799 log files in place. Contributed by Roberto Lima.
1801 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1803 TF/03 Bugzilla 615: When checking the local_parts router precondition
1804 after a local_part_suffix or local_part_prefix option, Exim now
1805 does not use the address's named list lookup cache, since this
1806 contains cached lookups for the whole local part.
1808 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1809 Robert Millan. Documentation is in experimental-spec.txt.
1811 TF/04 Bugzilla 668: Fix parallel build (make -j).
1813 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1815 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1816 Patch provided by Jan Srzednicki.
1818 TF/05 Leading white space used to be stripped from $spam_report which
1819 wrecked the formatting. Now it is preserved.
1821 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1822 that they are available at delivery time.
1824 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1826 TF/08 TLS error reporting now respects the incoming_interface and
1827 incoming_port log selectors.
1829 TF/09 Produce a more useful error message if an SMTP transport's hosts
1830 setting expands to an empty string.
1832 NM/06 Bugzilla 744: EXPN did not work under TLS.
1833 Patch provided by Phil Pennock.
1835 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1836 Patch provided by Richard Godbee.
1838 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1839 acl_smtp_notquit, added index entry.
1841 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1842 Patch provided by Eugene Bujak.
1844 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1845 accept(). Patch provided by Maxim Dounin.
1847 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1848 Patch provided by Phil Pennock.
1850 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1852 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1853 Patch provided by Brad "anomie" Jorsch.
1855 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1856 Patch provided by Dean Brooks.
1858 TK/05 Add native DKIM support (does not depend on external libraries).
1860 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1861 Patch provided by Graeme Fowler.
1863 NM/16 Bugzilla 851: Documentation example syntax fix.
1865 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1867 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1870 NM/19 Bugzilla 745: TLS version reporting.
1871 Patch provided by Phil Pennock.
1873 NM/20 Bugzilla 167: bool: condition support.
1874 Patch provided by Phil Pennock.
1876 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1877 clients. Patch provided by Phil Pennock.
1879 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1880 Patch provided by Brad "anomie" Jorsch.
1882 NM/23 Bugzilla 687: Fix misparses in eximstats.
1883 Patch provided by Heiko Schlittermann.
1885 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1886 Patch provided by Heiko Schlittermann.
1888 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1889 plus update to original patch.
1891 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1893 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1894 Patch provided by David Brownlee.
1896 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1898 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1900 NM/30 Bugzilla 888: TLS documentation bugfixes.
1902 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1904 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1905 Unlike the original bugzilla I have changed all shell scripts in src tree.
1907 NM/33 Bugzilla 898: Transport filter timeout fix.
1908 Patch by Todd Rinaldo.
1910 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1911 Patch by Serge Demonchaux.
1913 NM/35 Bugzilla 39: Base64 decode bug fixes.
1914 Patch by Jakob Hirsch.
1916 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1918 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1920 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1922 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1928 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1929 ALT-N's libdkim that I have put here:
1930 http://duncanthrax.net/exim-experimental/
1932 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1933 were called 'true' and it seems that C99 defines that as a reserved
1934 keyword to be used with 'bool' variable types. That means you could
1935 not include C99-style headers which use bools without triggering
1936 build errors in sieve.c.
1938 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1939 as mailq or other aliases. Changed the --help handling significantly
1940 to do whats expected. exim_usage() emits usage/help information.
1942 SC/01 Added the -bylocaldomain option to eximstats.
1944 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1946 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1948 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1954 PH/01 Another patch from the Sieve maintainer.
1956 PH/02 When an IPv6 address is converted to a string for single-key lookup
1957 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1958 dots are used instead of colons so that keys in lsearch files need not
1959 contain colons. This was done some time before quoting was made available
1960 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1961 (notated using the quote facility) so as to distinguish them from IPv4
1962 keys. This meant that lookups for IP addresses in host lists did not work
1963 for iplsearch lookups.
1965 This has been fixed by arranging for IPv6 addresses to be expressed with
1966 colons if the lookup type is iplsearch. This is not incompatible, because
1967 previously such lookups could never work.
1969 The situation is now rather anomalous, since one *can* have colons in
1970 ordinary lsearch keys. However, making the change in all cases is
1971 incompatible and would probably break a number of configurations.
1973 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1976 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1977 conversion specification without a maximum field width, thereby enabling
1978 a rogue spamd server to cause a buffer overflow. While nobody in their
1979 right mind would setup Exim to query an untrusted spamd server, an
1980 attacker that gains access to a server running spamd could potentially
1981 exploit this vulnerability to run arbitrary code as the Exim user.
1983 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1984 $primary_hostname instead of what libspf2 thinks the hosts name is.
1986 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1987 a directory entry by the name of the lookup key. Previously, if a
1988 symlink pointed to a non-existing file or a file in a directory that
1989 Exim lacked permissions to read, a lookup for a key matching that
1990 symlink would fail. Now it is enough that a matching directory entry
1991 exists, symlink or not. (Bugzilla 503.)
1993 PH/03 The body_linecount and body_zerocount variables are now exported in the
1996 PH/04 Added the $dnslist_matched variable.
1998 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1999 This means they are set thereafter only if the connection becomes
2002 PH/06 Added the client_condition to authenticators so that some can be skipped
2003 by clients under certain conditions.
2005 PH/07 The error message for a badly-placed control=no_multiline_responses left
2006 "_responses" off the end of the name.
2008 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2010 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2011 (without spaces) instead of just copying the configuration text.
2013 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2015 PH/11 Added $max_received_linelength.
2017 PH/12 Added +ignore_defer and +include_defer to host lists.
2019 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2020 way in which PCRE > 7.0 is built.
2022 PH/14 Implemented queue_only_load_latch.
2024 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2025 MAIL command. The effect was to mangle the value on 64-bit systems.
2027 PH/16 Another patch from the Sieve maintainer.
2029 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2031 PH/18 If a system quota error occurred while trying to create the file for
2032 a maildir delivery, the message "Mailbox is full" was not appended to the
2033 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2034 only to a quota excession during the actual writing of the file.
2036 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2037 characters?) which causes problems in log lines. The DN values are now
2038 passed through string_printing() before being added to log lines.
2040 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2041 and InterBase are left for another time.)
2043 PH/21 Added message_body_newlines option.
2045 PH/22 Guard against possible overflow in moan_check_errorcopy().
2047 PH/23 POSIX allows open() to be a macro; guard against that.
2049 PH/24 If the recipient of an error message contained an @ in the local part
2050 (suitably quoted, of course), incorrect values were put in $domain and
2051 $local_part during the evaluation of errors_copy.
2057 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2058 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2061 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2062 issue a MAIL command.
2064 PH/02 In an ACL statement such as
2066 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2068 if a client was not listed at all, or was listed with a value other than
2069 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2070 the condition was not true (as it should be), so access was not denied.
2071 The bug was that the ! inversion was incorrectly passed on to the second
2072 item. This has been fixed.
2074 PH/03 Added additional dnslists conditions == and =& which are different from
2075 = and & when the dns lookup returns more than one IP address.
2077 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2078 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2080 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2081 FSYNC, which compiles an option called disable_fsync that allows for
2082 bypassing fsync(). The documentation is heavily laced with warnings.
2084 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2086 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2087 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2088 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2089 including adding "make clean"; (3) Added -fPIC when compiling the test
2090 dynamically loaded module, to get rid of a warning.
2092 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2093 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2094 = 0s. The bug is otherwise harmless.
2096 PH/07 There was a bug in the dovecot authenticator such that the value of
2097 $auth1 could be overwritten, and so not correctly preserved, after a
2098 successful authentication. This usually meant that the value preserved by
2099 the server_setid option was incorrect.
2101 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2103 PH/09 Installed PCRE release 7.0.
2105 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2106 run for batched SMTP input. It is now run at the start of every message
2107 in the batch. While fixing this I discovered that the process information
2108 (output by running exiwhat) was not always getting set for -bs and -bS
2109 input. This is fixed, and it now also says "batched" for BSMTP.
2111 PH/11 Added control=no_pipelining.
2113 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2114 patch, slightly modified), and move the expansion of helo_data till after
2115 the connection is made in the smtp transport (so it can use these
2118 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2120 PH/14 Added log_selector = +pid.
2122 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2124 PH/16 Add ${if forany and ${if forall.
2126 PH/17 Added dsn_from option to vary the From: line in DSNs.
2128 PH/18 Flush SMTP output before performing a callout, unless control =
2129 no_callout_flush is set.
2131 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2132 was true (the default) a successful delivery failed to delete the retry
2133 item, thus causing premature timeout of the address. The bug is now
2136 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2138 PH/21 Long custom messages for fakedefer and fakereject are now split up
2139 into multiline responses in the same way that messages for "deny" and
2140 other ACL rejections are.
2142 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2143 with slight modification.
2145 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2146 draft, changing the syntax and factoring some duplicate code".
2148 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2149 for deliveries of the second and subsequent messages over the same SMTP
2152 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2153 ${reduce, with only minor "tidies".
2155 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2157 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2158 expansion side effects.
2160 PH/27 When a message times out after an over-quota error from an Exim-imposed
2161 quota, the bounce message says "mailbox is full". This message was not
2162 being given when it was a system quota that was exceeded. It now should
2165 MH/03 Made $recipients available in local_scan(). local_scan() already has
2166 better access to the recipient list through recipients_list[], but
2167 $recipients can be useful in postmaster-provided expansion strings.
2169 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2170 in the case of a MAIL command with additional options following the
2171 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2172 were accidentally chopped off.
2174 PH/29 SMTP synchronization checks are implemented when a command is read -
2175 there is a check that no more input is waiting when there shouldn't be
2176 any. However, for some commands, a delay in an ACL can mean that it is
2177 some time before the response is written. In this time, more input might
2178 arrive, invalidly. So now there are extra checks after an ACL has run for
2179 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2180 pipelining has not been advertised.
2182 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2184 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2185 returned in the SMTP response when smtp_return_error_details was false.
2186 This has been fixed.
2188 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2189 instead of the C I/O that was originally supplied, because problems were
2190 reported on Solaris.
2192 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2193 Exim which did not show up earlier: it was assuming that a call to
2194 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2195 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2196 was a macro that became an assignment, so it seemed to work. This has
2197 changed to a proper function call with a void return, hence the compile
2198 error. Exim's code has been fixed.
2200 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2203 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2205 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2207 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2208 because it turns out to be too big or there is a timeout) there is no
2209 "Completed" line in the log. When some messages of this type were
2210 selected by exigrep, they were listed as "not completed". Others were
2211 picked up by some special patterns. I have improved the selection
2212 criteria to be more general.
2214 PH/38 The host_find_failed option in the manualroute router can now be set
2215 to "ignore", to completely ignore a host whose IP address cannot be
2216 found. If all hosts are ignored, the behaviour is controlled by the new
2217 host_all_ignored option.
2219 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2220 homing or because of multiple MX records with /mx) generated more than
2221 one IP address, and the following item turned out to be the local host,
2222 all the secondary addresses of the first item were incorrectly removed
2223 from the list, along with the local host and any following hosts (which
2224 is what is supposed to happen).
2226 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2227 whoever called Exim into the -H file. In the case of the daemon it was
2228 behaving confusingly. When first started, it used values for whoever
2229 started the daemon, but after a SIGHUP it used the Exim user (because it
2230 calls itself on a restart). I have changed the code so that it now always
2233 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2234 message are rejected with the same error (e.g. no authentication or bad
2235 sender address), and a DATA command is nevertheless sent (as can happen
2236 with PIPELINING or a stupid MUA), the error message that was given to the
2237 RCPT commands is included in the rejection of the DATA command. This is
2238 intended to be helpful for MUAs that show only the final error to their
2241 PH/42 Another patch from the Sieve maintainer.
2243 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2244 Eximstats - Fixed some broken HTML links and added missing column headers
2246 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2247 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2249 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2251 PH/43 Yet another patch from the Sieve maintainer.
2253 PH/44 I found a way to check for a TCP/IP connection going away before sending
2254 the response to the final '.' that terminates a message, but only in the
2255 case where the client has not sent further data following the '.'
2256 (unfortunately, this is allowed). However, in many cases there won't be
2257 any further data because there won't be any more messages to send. A call
2258 to select() can be used: if it shows that the input is "ready", there is
2259 either input waiting, or the socket has been closed. An attempt to read
2260 the next input character can distinguish the two cases. Previously, Exim
2261 would have sent an OK response which the client would never have see.
2262 This could lead to message repetition. This fix should cure that, at
2263 least in a lot of common cases.
2265 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2266 advertised in response to EHLO.
2272 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2273 fixed by 4.65/MH/01 (is this a record?) are fixed:
2275 (i) An empty string was always treated as zero by the numeric comparison
2276 operators. This behaviour has been restored.
2278 (ii) It is documented that the numeric comparison operators always treat
2279 their arguments as decimal numbers. This was broken in that numbers
2280 starting with 0 were being interpreted as octal.
2282 While fixing these problems I realized that there was another issue that
2283 hadn't been noticed. Values of message_size_limit (both the global option
2284 and the transport option) were treated as octal if they started with 0.
2285 The documentation was vague. These values are now always treated as
2286 decimal, and I will make that clear in the documentation.
2292 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2293 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2296 MH/01 Don't check that the operands of numeric comparison operators are
2297 integers when their expansion is in "skipping" mode (fixes bug
2298 introduced by 4.64-PH/07).
2300 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2301 child addresses, Exim now panics and dies. Previously, because the count
2302 is held in a short int, deliveries were likely to be lost. As such a
2303 large number of recipients for a single message is ridiculous
2304 (performance will be very, very poor), I have chosen to impose a limit
2305 rather than extend the field.
2311 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2312 leftover -K file (the existence of which was triggered by #402).
2313 While we were at it, introduced process PID as part of the -K
2314 filename. This should rule out race conditions when creating
2317 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2318 processing considerably. Previous code took too long for large mails,
2319 triggering a timeout which in turn triggers #401.
2321 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2322 in the DK code in transports.c. sendfile() is not really portable,
2323 hence the _LINUX specificness.
2325 TF/01 In the add_headers option to the mail command in an Exim filter,
2326 there was a bug that Exim would claim a syntax error in any
2327 header after the first one which had an odd number of characters
2330 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2331 callout verification, Exim cached a "reject" for the entire domain. This
2332 is correct for most verifications, but it is not correct for a recipient
2333 verification with use_sender or use_postmaster set, because in that case
2334 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2335 case of MAIL FROM:<> rejection from other early rejections (e.g.
2336 rejection of HELO). When verifying a recipient using a non-null MAIL
2337 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2338 Whatever the result of the callout, the value of the domain cache is
2339 left unchanged (for any other kind of callout, getting as far as trying
2340 RCPT means that the domain itself is ok).
2342 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2345 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2346 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2347 session, the daemon ignores ECONNECT errors and logs others; it now
2348 ignores EPIPE as well.
2350 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2351 (quoted-printable decoding).
2353 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2354 later the small subsequent patch to fix an introduced bug.
2356 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2358 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2360 PH/08 An error is now given if message_size_limit is specified negative.
2362 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2363 to be given (somewhat) arbitrary names.
2365 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2368 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2369 miscellaneous code fixes
2371 PH/10 Added the log_reject_target ACL modifier to specify where to log
2374 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2375 hostname. This is wrong, because it relates to the incoming message (and
2376 probably the interface on which it is arriving) and not to the outgoing
2377 callout (which could be using a different interface). This has been
2378 changed to use the value of the helo_data option from the smtp transport
2379 instead - this is what is used when a message is actually being sent. If
2380 there is no remote transport (possible with a router that sets up host
2381 addresses), $smtp_active_hostname is used.
2383 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2384 tweaks were necessary in order to get it to work (see also 21 below):
2385 (a) The code assumed that strncpy() returns a negative number on buffer
2386 overflow, which isn't the case. Replaced with Exim's string_format()
2388 (b) There were several signed/unsigned issues. I just did the minimum
2389 hacking in of casts. There is scope for a larger refactoring.
2390 (c) The code used strcasecmp() which is not a standard C function.
2391 Replaced with Exim's strcmpic() function.
2392 (d) The code set only $1; it now sets $auth1 as well.
2393 (e) A simple test gave the error "authentication client didn't specify
2394 service in request". It would seem that Dovecot has changed its
2395 interface. Fortunately there's a specification; I followed it and
2396 changed what the client sends and it appears to be working now.
2398 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2401 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2402 address A is aliased to B and C, where B exists and C does not. Without
2403 -v the output is "A verified" because verification stops after a
2404 successful redirection if more than one address is generated. However,
2405 with -v the child addresses are also verified. Exim was outputting "A
2406 failed to verify" and then showing the successful verification for C,
2407 with its parentage. It now outputs "B failed to verify", showing B's
2408 parentage before showing the successful verification of C.
2410 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2411 look up a TXT record in a specific list after matching in a combined
2414 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2415 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2416 they consult the DNS. I had assumed they would set it the way they
2417 wanted; and indeed my experiments on Linux seem to show that in some
2418 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2419 To be on the safe side, however, I have now made the interface to
2420 host_find_byname() similar to host_find_bydns(), with an argument
2421 containing the DNS resolver options. The host_find_byname() function now
2422 sets these options at its start, just as host_find_bydns() does. The smtp
2423 transport options dns_qualify_single and dns_search_parents are passed to
2424 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2425 of host_find_byname() use the default settings of RES_DEFNAMES
2426 (qualify_single) but not RES_DNSRCH (search_parents).
2428 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2429 spool_read_header() do less string testing, by means of a preliminary
2430 switch on the second character of optional "-foo" lines. (This is
2431 overdue, caused by the large number of possibilities that now exist.
2432 Originally there were few.) While I was there, I also converted the
2433 str(n)cmp tests so they don't re-test the leading "-" and the first
2434 character, in the hope this might squeeze out yet more improvement.
2436 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2437 flag allowing group syntax was set by the header_syntax check but not
2438 turned off, possible causing trouble later; (2) The flag was not being
2439 set at all for the header_verify test, causing "group"-style headers to
2440 be rejected. I have now set it in this case, and also caused header_
2441 verify to ignore an empty address taken from a group. While doing this, I
2442 came across some other cases where the code for allowing group syntax
2443 while scanning a header line wasn't quite right (mostly, not resetting
2444 the flag correctly in the right place). These bugs could have caused
2445 trouble for malformed header lines. I hope it is now all correct.
2447 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2448 with the "reply" argument non-NULL. The code, however (which originally
2449 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2450 but it didn't always do it. This confused somebody who was copying the
2451 code for some other use. I have removed all the tests.
2453 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2454 feature that was used to support insecure browsers during the U.S. crypto
2455 embargo. It requires special client support, and Exim is probably the
2456 only MTA that supported it -- and would never use it because real RSA is
2457 always available. This code has been removed, because it had the bad
2458 effect of slowing Exim down by computing (never used) parameters for the
2459 RSA_EXPORT functionality.
2461 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2462 authenticator to fail if there's a tab character in the incoming data
2463 (there should never be unless someone is messing about, as it's supposed
2464 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2465 if the connection is using TLS or if the remote IP is the same as the
2466 local IP, and the "valid-client-cert option" if a client certificate has
2469 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2470 authenticators. This can be used for authorization after authentication
2471 succeeds. (In the case of plaintext, it servers for both authentication
2474 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2475 if any retry times were supplied.
2477 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2478 connection, where there is no client IP address to check. In this
2479 situation, the verify now always succeeds.
2481 PH/25 Applied John Jetmore's -Mset patch.
2483 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2485 PH/27 In a string expansion for a processed (not raw) header when multiple
2486 headers of the same name were present, leading whitespace was being
2487 removed from all of them, but trailing whitespace was being removed only
2488 from the last one. Now trailing whitespace is removed from each header
2489 before concatenation. Completely empty headers in a concatenation (as
2490 before) are ignored.
2492 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2493 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2495 PH/29 [Removed. This was a change that I later backed out, and forgot to
2496 correct the ChangeLog entry (that I had efficiently created) before
2497 committing the later change.]
2499 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2500 address errors (4xx response to RCPT) over the same connection as other
2501 messages routed to the same hosts. Such deliveries are always "forced",
2502 so retry times are not inspected. This resulted in far too many retries
2503 for the affected addresses. The effect occurred only when there were more
2504 hosts than the hosts_max_try setting in the smtp transport when it had
2505 the 4xx errors. Those hosts that it had tried were not added to the list
2506 of hosts for which the message was waiting, so if all were tried, there
2507 was no problem. Two fixes have been applied:
2509 (i) If there are any address or message errors in an SMTP delivery, none
2510 of the hosts (tried or untried) are now added to the list of hosts
2511 for which the message is waiting, so the message should not be a
2512 candidate for sending over the same connection that was used for a
2513 successful delivery of some other message. This seems entirely
2514 reasonable: after all the message is NOT "waiting for some host".
2515 This is so "obvious" that I'm not sure why it wasn't done
2516 previously. Hope I haven't missed anything, but it can't do any
2517 harm, as the worst effect is to miss an optimization.
2519 (ii) If, despite (i), such a delivery is accidentally attempted, the
2520 routing retry time is respected, so at least it doesn't keep
2521 hammering the server.
2523 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2524 in ${readsocket because some servers need this prod.
2526 PH/32 Added some extra debug output when updating a wait-xxx database.
2528 PH/33 The hint "could be header name not terminated by colon", which has been
2529 given for certain expansion errors for a long time, was not being given
2530 for the ${if def:h_colon_omitted{... case.
2532 PH/34 The spec says: "With one important exception, whenever a domain list is
2533 being scanned, $domain contains the subject domain." There was at least
2534 one case where this was not true.
2536 PH/35 The error "getsockname() failed: connection reset by peer" was being
2537 written to the panic log as well as the main log, but it isn't really
2538 panic-worthy as it just means the connection died rather early on. I have
2539 removed the panic log writing for the ECONNRESET error when getsockname()
2542 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2543 runs only) independently of the message's sender address. This meant
2544 that, if the 4xx error was in fact related to the sender, a different
2545 message to the same recipient with a different sender could confuse
2546 things. In particular, this can happen when sending to a greylisting
2547 server, but other circumstances could also provoke similar problems.
2548 I have changed the default so that the retry time for these errors is now
2549 based a combination of the sender and recipient addresses. This change
2550 can be overridden by setting address_retry_include_sender=false in the
2553 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2554 remote server are returned as part of bounce messages. This was not
2555 happening for LMTP over a pipe (the lmtp transport), but now it is the
2556 same for both kinds of LMTP.
2558 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2559 in header lines that were in fact CNAMEs. This is no longer the case.
2561 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2562 and queue runs started by the daemon processed all messages. This has
2563 been fixed so that -R and -S can now usefully be given with -q<time>.
2565 PH/40 Import PCRE release 6.7 (fixes some bugs).
2567 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2569 PH/42 Give an error if -q is specified more than once.
2571 PH/43 Renamed the variables $interface_address and $interface_port as
2572 $received_ip_address and $received_port, to make it clear that these
2573 values apply to message reception, and not to the outgoing interface when
2574 a message is delivered. (The old names remain recognized, of course.)
2576 PH/44 There was no timeout on the connect() call when using a Unix domain
2577 socket in the ${readsocket expansion. There now is.
2579 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2580 be meaningful with "accept".
2582 SC/01 Eximstats V1.43
2583 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2585 SC/02 Eximstats V1.44
2586 Use a glob alias rather than an array ref in the generated
2587 parser. This improves both readability and performance.
2589 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2590 Collect SpamAssassin and rejection statistics.
2591 Don't display local sender or destination tables unless
2592 there is data to show.
2593 Added average volumes into the top table text output.
2595 SC/04 Eximstats V1.46
2596 Collect data on the number of addresses (recipients)
2597 as well as the number of messages.
2599 SC/05 Eximstats V1.47
2600 Added 'Message too big' to the list of mail rejection
2601 reasons (thanks to Marco Gaiarin).
2603 SC/06 Eximstats V1.48
2604 Mainlog lines which have GMT offsets and are too short to
2605 have a flag are now skipped.
2607 SC/07 Eximstats V1.49 (Alain Williams)
2608 Added the -emptyok flag.
2610 SC/08 Eximstats V1.50
2611 Fixes for obtaining the IP address from reject messages.
2613 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2614 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2615 whitespace changes from 4.64-PH/27
2617 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2620 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2621 are found, allow negative numbers in numeric criteria)
2623 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2625 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2626 to match changes made in 4.64-PH/43
2628 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2630 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2631 "domain" is actually an IP address, and force a failure. This locks out
2632 those revolvers/nameservers that support "A-for-A" lookups, in
2633 contravention of the specifications.
2635 PH/48 When a host name was looked up from an IP address, and the subsequent
2636 forward lookup of the name timed out, the host name was left in
2637 $sender_host_name, contrary to the specification.
2639 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2640 restricted to single-key lookups, Exim was not diagnosing an error if
2641 * or *@ was used with a query-style lookup.
2643 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2645 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2646 long ago, but noone interested enough thought of it. Let's just say that
2647 the "1.1" means that there are some new functions that weren't there at
2648 some point in the past.
2650 PH/51 Error processing for expansion failure of helo_data from an smtp
2651 transport during callout processing was broken.
2653 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2654 tested/used via the -bh/-bhc/-bs options.
2656 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2657 bug, fixed in subsequent PCRE releases).
2659 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2660 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2662 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2668 SC/01 Use a glob alias rather than an array ref in eximstats generated
2669 parser. This improves both readability and performance.
2671 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2672 Don't display local sender or destination tables in eximstats unless
2673 there is data to show.
2674 Added average volumes into the eximstats top table text output.
2676 SC/03 Collect data on the number of addresses (recipients) as well
2677 as the number of messages in eximstats.
2679 TF/01 Correct an error in the documentation for the redirect router. Exim
2680 does (usually) call initgroups() when daemonizing.
2682 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2683 with consistent privilege compared to when running as a daemon.
2685 TF/03 Note in the spec that $authenticated_id is not set for local
2686 submissions from trusted users.
2688 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2689 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2691 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2692 by adding some example configuration directives to the default
2693 configuration file. A little bit of work is required to uncomment the
2694 directives and define how usernames and passwords are checked, but
2695 there is now a framework to start from.
2697 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2698 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2699 without this. I don't know how relevant this is to other LDAP libraries.
2701 PH/02 Add the verb name to the "unknown ACL verb" error.
2703 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2705 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2707 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2708 directory not expanded when it should be if an expanded home directory
2709 was set for the address (which is overridden by the transport).
2711 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2714 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2715 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2716 because it is too late at that time, and has no effect.
2718 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2719 security issue with \' (bugzilla #107). I could not use the
2720 PQescapeStringConn() function, because it needs a PGconn value as one of
2723 PH/08 When testing addresses using -bt, indicate those final addresses that
2724 are duplicates that would not cause an additional delivery. At least one
2725 person was confused, thinking that -bt output corresponded to deliveries.
2726 (Suppressing duplicates isn't a good idea as you lose the information
2727 about possibly different redirections that led to the duplicates.)
2729 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2730 systems where poll() doesn't work, in particular OS X.
2732 PH/10 Added more information to debugging output for retry time not reached.
2734 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2735 operations in malware.c.
2737 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2740 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2741 syslog_duplication set false, log lines that would normally be written
2742 both the the main log and to the reject log were not written to syslog at
2745 PH/14 In the default configuration, change the use of "message" in ACL warn
2746 statements to "add_header".
2748 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2749 not followed by a command (e.g. "seen endif").
2751 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2752 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2755 PH/17 Added extra conditions to the default value of delay_warning_condition
2759 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2760 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2761 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2764 The Auto-Submitted: and various List- headers are standardised, whereas I
2765 don't think Precedence: ever was.
2767 PH/18 Refactored debugging code in route_finduser() to show more information,
2768 in particular, the error code if getpwnam() issues one.
2770 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2771 This is apparently needed in addition to the PH/07 change above to avoid
2772 any possible encoding problems.
2774 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2775 but not after initializing Perl.
2777 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2778 output them only if debugging. By default they are written stderr,
2779 apparently, which is not desirable.
2781 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2784 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2787 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2789 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2790 authenticated or an ident call has been made. Suppress the default
2791 values for $authenticated_id and $authenticated_sender (but permit -oMai
2792 and -oMas) when testing with -bh.
2794 PH/24 Re-jigged the order of the tests in the default configuration so that the
2795 tests for valid domains and recipients precede the DNS black list and CSA
2796 tests, on the grounds that those ones are more expensive.
2798 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2799 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2800 This bug exists in every version of Exim that I still have, right back to
2803 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2804 However, an attempt to turn on case-sensitivity in a regex key by
2805 including (?-i) didn't work because the subject string was already
2806 lowercased, and the effects were non-intuitive. It turns out that a
2807 one-line patch can be used to allow (?-i) to work as expected.
2813 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2814 other effects) broke the use of negated acl sub-conditions.
2816 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2819 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2820 "Deny" causes Exim to reject the incoming connection with a 554 error.
2821 Unfortunately, if there is a major crisis, such as a disk failure,
2822 tcp-wrappers gives "deny", whereas what one would like would be some
2823 kind of temporary error. A kludge has been added to help with this.
2824 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2825 554 error is used if errno is still zero or contains ENOENT (which occurs
2826 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2829 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2831 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2832 errors. Otherwise a message that provokes a temporary error (when other
2833 messages do not) can cause a whole host to time out.
2835 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2836 addresses were routed directly to files or pipes from a redirect router.
2837 File deliveries just didn't batch; pipe deliveries might have suffered
2840 PH/06 A failure to get a lock for a hints database would erroneously always say
2841 "Failed to get write lock", even when it was really a read lock.
2843 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2844 of 0600. This has been changed to use the value of the lockfile_mode
2845 option (which defaults to 0600).
2847 PH/08 Applied small patch from the Sieve maintainer.
2849 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2850 folder from quota calculations, a direct delivery into this folder messed
2851 up the contents of the maildirsize file. This was because the regex was
2852 used only to exclude .Trash (or whatever) when the size of the mailbox
2853 was calculated. There was no check that a delivery was happening into an
2854 excluded directory. This bug has been fixed by ignoring all quota
2855 processing for deliveries into excluded directories.
2857 PH/10 Added the maildirfolder_create_regex option to appendfile.
2863 PH/01 The code for finding all the local interface addresses on a FreeBSD
2864 system running IPv6 was broken. This may well have applied to all BSD
2865 systems, as well as to others that have similar system calls. The broken
2866 code found IPv4 interfaces correctly, but gave incorrect values for the
2867 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2868 that it would not match correctly against @[] and not recognize the IPv6
2871 PH/02 The ipliteral router was not recognizing addresses of the form user@
2872 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2874 PH/03 Added disable_ipv6.
2876 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2877 decoded form, because it is most often used to construct To: headers
2878 lines in autoreplies, and the decoded form may well be syntactically
2879 invalid. However, $reply_address has leading white space removed, and all
2880 newlines turned into spaces so that the autoreply transport does not
2883 PH/05 If group was specified without a user on a router, and no group or user
2884 was specified on a transport, the group from the router was ignored.
2886 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2887 for visible compile-time settings that can be used to change these
2888 numbers, for those that want even more. Backwards compatibility with old
2889 spool files has been maintained. However, going back to a previous Exim
2890 release will lost any variables that are in spool files.
2892 PH/07 Two small changes when running in the test harness: increase delay when
2893 passing a TCP/IP connection to a new process, in case the original
2894 process has to generate a bounce, and remove special handling of
2895 127.0.0.2 (sic), which is no longer necessary.
2897 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2898 be the same on different OS.
2900 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2903 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2904 whether --show-vars was specified or not
2906 JJ/02 exipick: Added support for new ACL variable spool format introduced
2909 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2910 syntactically invalid From: or Reply-to: line, and a filter used this to
2911 generate an autoreply, and therefore failed to obtain an address for the
2912 autoreply, Exim could try to deliver to a non-existent relative file
2913 name, causing unrelated and misleading errors. What now happens is that
2914 it logs this as a hard delivery error, but does not attempt to create a
2917 PH/11 The exinext utility has a -C option for testing purposes, but although
2918 the given file was scanned by exinext itself; it wasn't being passed on
2919 when Exim was called.
2921 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2922 an end-of-file indication when reading a command response.
2924 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2925 compiled. In many other places in Exim, IPv6 addresses are always
2926 recognized, so I have changed this. It also means that IPv4 domain
2927 literals of the form [IPV4:n.n.n.n] are now always recognized.
2929 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2930 used if the router is not running as root, for example, when verifying at
2931 ACL time, or when using -bh. The debugging output from this situation was
2932 non-existent - all you got was a failure to exec. I have made two
2935 (a) Failures to set uid/gid, the current directory, or a process leader
2936 in a subprocess such as that created by queryprogram now generate
2937 suitable debugging output when -d is set.
2939 (b) The queryprogram router detects when it is not running as root,
2940 outputs suitable debugging information if -d is set, and then runs
2941 the subprocess without attempting to change uid/gid.
2943 PH/15 Minor change to Makefile for building test_host (undocumented testing
2946 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2947 additional section of a DNS packet that returns MX or SRV records.
2948 Instead, it always explicitly searches for A/AAAA records. This avoids
2949 major problems that occur when a DNS server includes only records of one
2950 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2951 fixed another bug: if SRV records were looked up and the corresponding
2952 address records were *not* found in the additional section, the port
2953 values from the SRV records were lost.
2955 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2956 using the correct key (the original address) when searching the retry
2957 rules in order to find which one to use for generating the retry hint.
2959 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2960 adding the default one. Similarly, if it contains a Reply-To: header, the
2961 errors_reply_to option, if set, is not used.
2963 PH/19 When calculating a retry time, Exim used to measure the "time since
2964 failure" by looking at the "first failed" field in the retry record. Now
2965 it does not use this if it is later than than the arrival time of the
2966 message. Instead it uses the arrival time. This makes for better
2967 behaviour in cases where some deliveries succeed, thus re-setting the
2968 "first failed" field. An example is a quota failure for a huge message
2969 when small messages continue to be delivered. Without this change, the
2970 "time since failure" will always be short, possible causing more frequent
2971 delivery attempts for the huge message than are intended.
2972 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2974 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2975 $1, $2, $3) because the numerical variables can be reset during some
2976 expansion items (e.g. "match"), thereby losing the authentication data.
2978 PH/21 Make -bV show the size of off_t variables so that the test suite can
2979 decide whether to run tests for quotas > 2G.
2981 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2982 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2983 filecount value is greater than 2G or if a quota value is greater than 2G
2984 on a system where the size of off_t is not greater than 4, a panic error
2987 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2988 never match. The debug and -bh output now contains an explicit error
2989 message indicating a malformed IPv4 address or mask.
2991 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2992 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2993 PH/23 above applies.
2995 PH/25 Do not write to syslog when running in the test harness. The only
2996 occasion when this arises is a failure to open the main or panic logs
2997 (for which there is an explicit test).
2999 PH/26 Added the /no_tell option to "control=freeze".
3001 PH/27 If a host name lookup failed very early in a connection, for example, if
3002 the IP address matched host_lookup and the reverse lookup yielded a name
3003 that did not have a forward lookup, an error message of the form "no IP
3004 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3005 could be logged. Now it outputs the IP address instead of "NULL".
3007 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3008 allows the sender and the authenticated sender to be set when
3009 submitting a message from within Exim. Since child_open_exim() is
3010 documented for local_scan(), the new function should be too.
3012 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3013 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3014 results in an empty string is now treated as unset.
3016 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3018 PH/31 Added sender_verify_fail logging option.
3020 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3021 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3022 tidied the source and removed it altogether.
3024 PH/33 When a queue run was abandoned because the load average was too high, a
3025 log line was always written; now it is written only if the queue_run log
3026 selector is set. In addition, the log line for abandonment now contains
3027 information about the queue run such as the pid. This is always present
3028 in "start" and "stop" lines but was omitted from the "abandon" line.
3030 PH/34 Omit spaces between a header name and the colon in the error message that
3031 is given when verify = headers_syntax fails (if there are lots of them,
3032 the message gets confusing).
3034 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3035 names, as there are now some PTR records that contain slashes. This check
3036 is only to protect against broken name servers that fall over on strange
3037 characters, so the fact that it applies to all lookups doesn't matter.
3039 PH/36 Now that the new test suite is complete, we can remove some of the
3040 special code in Exim that was needed for the old test suite. For example,
3041 sorting DNS records because real resolvers return them in an arbitrary
3042 order. The new test suite's fake resolver always returns records in the
3045 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3046 bounces) except when queue_only is set, to avoid logging races between
3047 the different processes.
3049 PH/38 Panic-die if .include specifies a non-absolute path.
3051 PH/39 A tweak to the "H" retry rule from its user.
3053 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3054 a label. They prevented compilation on older perls.
3056 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3057 a warning to be raised on newish perls.
3059 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3060 on queue. Changes to match documented behaviour of showing count of
3061 messages matching specified criteria.
3063 PH/40 Changed the default ident timeout from 30s to 5s.
3065 PH/41 Added support for the use of login_cap features, on those BSD systems
3066 that have them, for controlling the resources used by pipe deliveries.
3068 PH/42 The content-scanning code uses fopen() to create files in which to put
3069 message data. Previously it was not paying any attention to the mode of
3070 the files. Exim runs with umask(0) because the rest of the code creates
3071 files with open(), and sets the required mode explicitly. Thus, these
3072 files were ending up world-writeable. This was not a big issue, because,
3073 being within the spool directory, they were not world-accessible. I have
3074 created a function called modefopen, which takes an additional mode
3075 argument. It sets umask(777), creates the file, chmods it to the required
3076 mode, then resets the umask. All the relevant calls to fopen() in the
3077 content scanning code have been changed to use this function.
3079 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3080 to 24 hours. This avoids potential overflow problems when processing G
3081 and H retry rules. I suspect nobody ever tinkers with this value.
3083 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3085 PH/45 When the plaintext authenticator is running as a client, the server's
3086 challenges are checked to ensure they are valid base64 strings. By
3087 default, the authentication attempt is cancelled if an invalid string is
3088 received. Setting client_ignore_invalid_base64 true ignores these errors.
3089 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3090 they are received. Thus, the responses can be made to depend on the
3091 challenges. If an invalid string is ignored, an empty string is placed in
3094 PH/46 Messages that are created by the autoreply transport now contains a
3095 References: header, in accordance with RFCs 2822 and 3834.
3097 PH/47 Added authenticated_sender_force to the smtp transport.
3099 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3101 PH/49 Installed latest patch from the Sieve maintainer.
3103 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3104 was also set, the appendfile transport was unnecessarily scanning a
3105 directory of message files (e.g. for maildir delivery) to find the count
3106 of files (along with the size), even though it did not need this
3107 information. It now does the scan only if it needs to find either the
3108 size of the count of files.
3110 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3112 PH/52 Two bugs concerned with error handling when the smtp transport is
3115 (i) Exim was not creating retry information for temporary errors given
3116 for individual recipients after the DATA command when the smtp transport
3117 was used in LMTP mode. This meant that they could be retried too
3118 frequently, and not timed out correctly.
3120 (ii) Exim was setting the flag that allows error details to be returned
3121 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3122 recipients that were returned after the DATA command.
3124 PH/53 This is related to PH/52, but is more general: for any failing address,
3125 when detailed error information was permitted to be returned to the
3126 sender, but the error was temporary, then after the final timeout, only
3127 "retry timeout exceeded" was returned. Now it returns the full error as
3128 well as "retry timeout exceeded".
3130 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3131 do this, and (what is worse) MTAs that accept it.
3133 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3134 will now be deprecated.
3136 PH/56 New os.c-cygwin from the Cygwin maintainer.
3138 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3139 formats (previously only available in exim formats via -bpr, -bpru,
3140 and -bpra. Now also available in native and exiqgrep formats)
3142 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3143 with very large, slow to parse queues
3145 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3147 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3149 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3150 responses to authentication challenges, though it was showing the
3151 challenges; (ii) I've removed the CR characters from the debug output for
3154 PH/58 Allow for the insertion of a newline as well as a space when a string
3155 is turned into more than one encoded-word during RFC 2047 encoding. The
3156 Sieve code now uses this.
3158 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3159 data_4xx, lost_connection, tls_required.
3161 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3162 message was being sent as an SMTP response.
3164 PH/61 Add -l and -k options to exicyclog.
3166 PH/62 When verifying, if an address was redirected to one new address, so that
3167 verification continued, and the new address failed or deferred after
3168 having set something in $address_data, the value of $address_data was not
3169 passed back to the ACL. This was different to the case when no
3170 redirection occurred. The value is now passed back in both cases.
3172 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3173 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3174 use login_cap.h, so on its own it isn't the distinguishing feature. The
3175 new name refers directly to the setclassresources() function.
3177 PH/65 Added configuration files for NetBSD3.
3179 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3181 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3182 is preferred over IPv4.
3184 PH/68 The bounce_return_message and bounce_return_body options were not being
3185 honoured for bounces generated during the reception of non-SMTP messages.
3186 In particular, this applied to messages rejected by the ACL. This bug has
3187 been fixed. However, if bounce_return_message is true and bounce_return_
3188 body is false, the headers that are returned for a non-SMTP message
3189 include only those that have been read before the error was detected.
3190 (In the case of an ACL rejection, they have all been read.)
3192 PH/69 The HTML version of the specification is now built in a directory called
3193 spec_html instead of spec.html, because the latter looks like a path with
3194 a MIME-type, and this confuses some software.
3196 PH/70 Catch two compiler warnings in sieve.c.
3198 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3199 function verify_get_ident() calls ip_connect() to connect a socket, but
3200 if the "connect()" function timed out, ip_connect() used to close the
3201 socket. However, verify_get_ident() also closes the socket later, and in
3202 between Exim writes to the log, which may get opened at this point. When
3203 the socket was closed in ip_connect(), the log could get the same file
3204 descriptor number as the socket. This naturally causes chaos. The fix is
3205 not to close the socket in ip_connect(); the socket should be closed by
3206 the function that creates it. There was only one place in the code where
3207 this was missing, in the iplookup router, which I don't think anybody now
3208 uses, but I've fixed it anyway.
3210 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3211 well as to direct DNS lookups. Otherwise the handling of names in host
3212 lists is inconsistent and therefore confusing.
3218 PH/01 Two changes to the default runtime configuration:
3220 (1) Move the checks for relay_from_hosts and authenticated clients from
3221 after to before the (commented out) DNS black list checks.
3223 (2) Add control=submission to the relay_from_hosts and authenticated
3224 clients checks, on the grounds that messages accepted by these
3225 statements are most likely to be submissions.
3227 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3229 (1) Generate an error if the third argument for the ${prvs expansion is
3232 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3235 (3) Reset the variables that are obtained from the first argument of
3236 ${prvscheck and used in the second argument before leaving the code,
3237 because their memory is reclaimed, so using them afterwards may do
3240 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3241 one (it's much easier than Tom thought :-).
3243 (5) Because of (4), we can now allow for the use of $prvscheck_result
3244 inside the third argument.
3246 PH/03 For some reason, the default setting of PATH when running a command from
3247 a pipe transport was just "/usr/bin". I have changed it to
3250 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3251 anything to be listed in the output from -bV.
3253 PH/05 When a filter generated an autoreply, the entire To: header line was
3254 quoted in the delivery log line, like this:
3256 => >A.N.Other <ano@some.domain> <original@ddress> ...
3258 This has been changed so that it extracts the operative address. There
3259 may be more than one such address. If so, they are comma-separated, like
3262 => >ano@some.domain,ona@other.domain <original@ddress> ...
3264 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3265 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3266 not being looked up in the rDNS to get a host name, Exim was showing the
3267 IP address twice in Received: lines, even though the IP addresses were
3268 identical. For example:
3270 Received: from [1.2.3.4] (helo=[1.2.3.4])
3272 However, if the real host name was known, it was omitting the HELO data
3273 if it matched the actual IP address. This has been tidied up so that it
3274 doesn't show the same IP address twice.
3276 PH/07 When both +timestamp and +memory debugging was on, the value given by
3277 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3278 called by the debug printing, thereby overwriting the timestamp buffer.
3279 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3281 PH/08 When the original message was included in an autoreply transport, it
3282 always said "this is a copy of the message, including all the headers",
3283 even if body_only or headers_only was set. It now gives an appropriate
3286 PH/09 Applied a patch from the Sieve maintainer which:
3288 o fixes some comments
3289 o adds the (disabled) notify extension core
3290 o adds some debug output for the result of if/elsif tests
3291 o points to the current vacation draft in the documentation
3292 and documents the missing references header update
3296 o fixes a bug in processing the envelope test (when testing
3297 multiple envelope elements, the last element determined the
3300 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3301 Electronic Mail") by including:
3303 Auto-submitted: auto-generated
3305 in the messages that it generates (bounce messages and others, such as
3306 warnings). In the case of bounce messages for non-SMTP messages, there was
3307 also a typo: it was using "Auto_submitted" (underscore instead of
3308 hyphen). Since every message generated by Exim is necessarily in response
3309 to another message, thes have all been changed to:
3311 Auto-Submitted: auto-replied
3313 in accordance with these statements in the RFC:
3315 The auto-replied keyword:
3317 - SHOULD be used on messages sent in direct response to another
3318 message by an automatic process,
3320 - MUST NOT be used on manually-generated messages,
3322 - MAY be used on Delivery Status Notifications (DSNs) and Message
3323 Disposition Notifications (MDNs),
3325 - MUST NOT be used on messages generated by automatic or periodic
3326 processes, except for messages which are automatic responses to
3329 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3330 to the default Received: header definition.
3332 PH/12 Added log selector acl_warn_skipped (default on).
3334 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3335 variables because (a) they are in the wrong storage pool and (b) even if
3336 they were copied, it wouldn't work properly because of the caching.
3338 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3339 checking when decoding. Apparently there are clients that generate
3340 overlong encoded strings. Why am I not surprised?
3342 PH/15 If the first argument of "${if match_address" was not empty, but did not
3343 contain an "@" character, Exim crashed. Now it writes a panic log message
3344 and treats the condition as false.
3346 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3348 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3349 extension "envelope-auth". The code is finished and in agreement with
3350 other implementations, but there is no documentation so far and in fact,
3351 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3352 not changing the active code.
3354 Print executed "if" and "elsif" statements when debugging is used. This
3355 helps a great deal to understand what a filter does.
3357 Document more things not specified clearly in RFC3028. I had all this
3358 sorted out, when out of a sudden new issues came to my mind. Oops."
3360 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3363 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3364 canonical form (as documented). However, after a host name lookup from
3365 the IP address, check_host() was doing a simple string comparison with
3366 addresses acquired from the DNS when checking that the found name did
3367 have the original IP as one of its addresses. Since any found IPv6
3368 addresses are likely to be in abbreviated form, the comparison could
3369 fail. Luckily, there already exists a function for doing the comparison
3370 by converting both addresses to binary, so now that is used instead of
3371 the text comparison.
3373 PH/20 There was another similar case to PH/19, when a complete host name was
3374 given in a host list; looking up its IP address could give an abbreviated
3375 form, whereas the current host's name might or might not be abbreviated.
3376 The same fix has been applied.
3382 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3383 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3386 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3387 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3389 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3391 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3392 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3393 Also, for "Auto-Submitted", treat anything other than "no" as
3394 non-personal, in accordance with RFC 3834. (Previously it treated
3395 anything starting "auto-" as non-personal.)
3397 TF/01 The control=submission/name=... option had a problem with syntax
3398 errors if the name included a slash character. The /name= option
3399 now slurps the rest of the string, so it can include any characters
3400 but it must come last in the list of options (after /sender_retain
3403 PH/05 Some modifications to the interface to the fake nameserver for the new
3411 TK/01 Added the "success_on_redirect" address verification option. See
3412 NewStuff for rationale and an example.
3414 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3416 PH/02 Patch to exigrep to allow it to work on syslog lines.
3418 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3419 fread() to skip over the body file's header line, because in Cygwin the
3420 header line is locked and is inaccessible.
3422 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3423 co-exist for some time) to make it clear that it is the Exim ID that is
3424 referenced, not the Message-ID: header line.
3426 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3427 string_format() function, because snprintf() does not exist on all
3430 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3431 ${stat: expansion item.
3433 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3434 protocol synchronization error", to keep the pedants happy.
3436 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3437 well as for IRIX systems, when gcc is being used. See the host.c source
3440 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3442 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3445 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3446 transport and to the smtp transport in LMTP mode.
3448 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3450 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3451 run a filter in a subprocess. This could lead to confusion in subsequent
3452 lookups in the parent process. There should also be a search_tidyup() at
3453 the end of the subprocess.
3455 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3456 only if the host matched helo_try_verify_hosts, which caused the
3457 verification to occur when the EHLO/HELO command was issued. The ACL just
3458 tested the remembered result. Now, if a previous verification attempt has
3459 not happened, "verify = helo" does it there and then.
3461 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3463 TK/03 Fix log output including CR from clamd.
3465 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3466 exist provoked a memory error which could cause a segfault.
3468 PH/15 Installed PCRE 6.2
3470 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3472 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3473 of the problem. Specifically, suggested +O2 rather than +O1 for the
3476 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3478 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3479 record, the port was not correctly logged when the outgoing_port log
3480 selector was set (it logged the transort's default port).
3482 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3483 fallback_hosts, and "hosts" in the smtp transport.
3485 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3486 host errors such as "Connection refused".
3488 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3489 authentication with radiusclient 0.4.9:
3491 - Error returned from rc_read_config was caught wrongly
3492 - Username/password not passed on to radius server due to wrong length.
3494 The presumption is that some radiusclient API changes for 4.51/PH/17
3495 were not taken care of correctly. The code is still untested by me (my
3496 Linux distribution still has 0.3.2 of radiusclient), but it was
3497 contributed by a Radius user.
3499 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3500 expanding the "port" option of the smtp transport.
3502 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3503 while reading a MIME header. Thanks to Tom Hughes for a patch.
3505 PH/24 Include config.h inside local_scan.h so that configuration settings are
3508 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3509 that in an ACL for RCPT (for example), you can examine exactly what was
3512 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3513 commands, but it was not correctly comparing the address with the actual
3514 client host address. Thus, it would show the EHLO address in Received:
3515 header lines when this was not necessary.
3517 PH/27 Added the % operator to ${eval:}.
3519 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3520 it should be ignoring failures (because with -C, for example, it has lost
3521 privilege). It wasn't ignoring creation failures other than "already
3524 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3527 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3528 because an input line was too long, either on its own, or by virtue of
3529 too many continuations, the temporary file was not being removed, and the
3530 return code was incorrect.
3532 PH/31 Missing "BOOL" in function definition in filtertest.c.
3534 PH/32 Applied Sieve patches from the maintainer.
3536 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3538 PH/33 Added "verify = not_blind".
3540 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3541 Local/Makefile (with some defaults set). These are used in built scripts
3542 such as exicyclog, but they have never been used in the exim_install
3543 script (though there are many overriding facilities there). I have
3544 arranged that the exim_install script now takes note of these two
3547 PH/35 Installed configuration files for Dragonfly.
3549 PH/36 When a locally submitted message by a trusted user did not contain a
3550 From: header, and the sender address was obtained from -f or from an SMTP
3551 MAIL command, and the trusted user did not use -F to supply a sender
3552 name, $originator_name was incorrectly used when constructing a From:
3553 header. Furthermore, $originator_name was used for submission mode
3554 messages from external hosts without From: headers in a similar way,
3555 which is clearly wrong.
3557 PH/37 Added control=suppress_local_fixups.
3559 PH/38 When log_selector = +received_sender was set, and the addition of the
3560 sender made the log line's construction buffer exactly full, or one byte
3561 less than full, an overflow happened when the terminating "\n" was
3564 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3565 when the result of a list match is failure because a DNS lookup failed.
3567 PH/40 RM_COMMAND is now used in the building process.
3569 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3570 the "build-* directories that it finds.
3572 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3573 address in a domain literal was a prefix of an interface address.
3575 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3576 when verifying a sender address, unless rewrite_headers is false.
3578 PH/44 Wrote a long comment about why errors_to addresses are verified as
3579 recipients, not senders.
3581 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3582 the ratelimit ACL was added.
3584 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3586 PH/46 Added extra information about PostgreSQL errors to the error string.
3588 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3589 avoiding the need to install special zones in a real server. This is
3590 backwards compatible; if it can't find the fake resolver, it drops back.
3591 Thus, both old and new test suites can be run.
3593 TF/02 Added util/ratelimit.pl
3595 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3596 clock is set back in time.
3598 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3599 Candler <B.Candler@pobox.com>.
3601 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3602 OK for addresses that are the result of redirections.
3604 PH/48 A number of further additions for the benefit of the new test suite,
3605 including a fake gethostbyname() that interfaces to the fake DNS resolver
3608 TF/06 The fix for widen_domains has also been applied to qualify_single and
3609 search_parents which are the other dnslookup options that can cause
3612 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3615 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3617 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3618 service" if it encountered an MX record with an empty target hostname.
3619 The message is now "an MX or SRV record indicated no SMTP service".
3621 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3622 if the DNS of the sending site is misconfigured. This is quite a
3623 common situation. This change restores the behaviour of treating a
3624 helo verification defer as a failure.
3626 PH/51 If self=fail was set on a router, the bounce message did not include the
3627 actual error message.
3633 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3635 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3636 command itself ended in error, the underlying message about the transport
3637 filter timeout was being overwritten with the pipe command error. Now the
3638 underlying error message should be appended to the second error message.
3640 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3642 PH/02 Reduce the amount of output that "make" produces by default. Full output
3643 can still be requested.
3645 PH/03 The warning log line about a condition test deferring for a "warn" verb
3646 was being output only once per connection, rather than after each
3647 occurrence (because it was using the same function as for successful
3648 "warn" verbs). This seems wrong, so I have changed it.
3650 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3651 it should not have, which might have caused a crash in the right
3652 circumstances, but probably never did.
3654 PH/04 Installed a modified version of Tony Finch's patch to make submission
3655 mode fix the return path as well as the Sender: header line, and to
3656 add a /name= option so that you can make the user's friendly name appear
3659 TF/03 Added the control = fakedefer ACL modifier.
3661 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3662 Mark Lowes for thorough testing.
3664 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3666 TK/03 Merged latest SRS patch from Miles Wilton.
3668 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3669 with the definition in sysexits.h (which is #included earlier).
3670 Fortunately, Exim does not actually use EX_OK. The code used to try to
3671 preserve the sysexits.h value, by assuming that macro definitions were
3672 scanned for macro replacements. I have been disabused of this notion,
3673 so now the code just undefines EX_OK before #including unistd.h.
3675 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3676 in the smtp transport. When a block could not be written in a single
3677 write() function, the timeout was being re-applied to each part-write.
3678 This seems wrong - if the receiver was accepting one byte at a time it
3679 would take for ever. The timeout is now adjusted when this happens. It
3680 doesn't have to be particularly precise.
3682 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3683 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3685 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3686 without a domain if the check to <postmaster@domain> fails.
3688 SC/01 Eximstats: added -xls and the ability to specify output files
3689 (patch written by Frank Heydlauf).
3691 SC/02 Eximstats: use FileHandles for outputting results.
3693 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3695 SC/04 Eximstats: fixed display of large numbers with -nvr option
3697 SC/05 Eximstats: fixed merging of reports with empty tables.
3699 SC/06 Eximstats: added the -include_original_destination flag
3701 SC/07 Eximstats: removed tabs and trailing whitespace.
3703 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3705 TK/06 MBOX spool code: Add real "From " MBOX separator line
3706 so the .eml file is really in mbox format (even though
3707 most programs do not really care). Patch from Alex Miller.
3709 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3710 The latter is generated from $received_to and is only set if the
3711 message has one envelope recipient. SA can use these headers,
3712 obviously out-of-the-box. Patch from Alex Miller.
3714 PH/08 The ${def test on a variable was returning false if the variable's
3715 value was "0", contrary to what the specification has always said!
3716 The result should be true unless the variable is empty.
3718 PH/09 The syntax error of a character other than { following "${if
3719 def:variable_name" (after optional whitespace) was not being diagnosed.
3720 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3721 accidental colon was present, for example, could give incorrect results.
3723 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3724 result is used (not including appendfile, where other changes are about
3727 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3728 This involved changing a lot of size variables from int to off_t. It
3729 should work with maildirs and everything.
3731 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3732 spamd dying while we are connected to it.
3734 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3737 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3738 function for BDB 4.3.
3740 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3742 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3743 the sources for PCRE have been re-arranged and more files are now
3746 PH/15 The code I had for printing potentially long long variables in PH/11
3747 above was not the best (it lost precision). The length of off_t variables
3748 is now inspected at build time, and an appropriate printing format (%ld
3749 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3750 to be "long long int" or "long int". This is needed for the internal
3751 formatting function string_vformat().
3753 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3754 the configuration file to be ":syslog", then the script "guesses" where
3755 the logs files are, rather than using the compiled in default. In our
3756 case the guess is not the same as the compiled default, so the script
3757 suddenly stopped working when I started to use syslog. The patch checks
3758 to see if log_file_path is "". If so, it attempts to read it from exim
3759 with no configuration file to get the compiled in version, before it
3760 falls back to the previous guessing code."
3762 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3763 implementing BATV in an Exim configuration. See NewStuff for the gory
3766 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3767 Makefile that are specific to HP-UX.
3769 PH/18 If the "use_postmaster" option was set for a recipient callout together
3770 with the "random" option, the postmaster address was used as the MAIL
3771 FROM address for the random test, but not for the subsequent recipient
3772 test. It is now used for both.
3774 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3775 patch removes a few documentation additions to RFC 3028, because the
3776 latest draft now contains them. It adds the new en;ascii-case comparator
3777 and a new error check for 8bit text in MIME parts. Comparator and
3778 require names are now matched exactly. I enabled the subaddress
3779 extension, but it is not well tested yet (read: it works for me)."
3781 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3782 rework some of the code of TK/09 above to avoid the hardwired use of
3783 "%lld" and "long long". Replaced the call to snprintf() with a call to
3786 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3787 records point to non-existent hosts", "retry timeout exceeded", and
3788 "retry time not reached for any host after a long failure period".
3790 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3791 experimental DomainKeys support:
3793 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3794 (2) On an error such as an illegally used "control", the wrong name for
3795 the control was given.
3797 These problems did NOT occur unless DomainKeys support was compiled.
3799 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3801 PH/24 Added ${if match_ip condition.
3803 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3804 databases so that it will be absolutely obvious if a crash occurs in the
3805 DB library. This is a regular occurrence (often caused by mis-matched
3808 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3809 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3810 picked up on a user's system that detects such things. There doesn't seem
3811 to be a gcc warning option for this - only an attribute that has to be
3812 put on the function's prototype. It seems that in Fedora Core 4 they have
3813 set this on a number of new functions. No doubt there will be more in due
3816 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3817 specify a transport. However, if an address that was verified by such a
3818 router was the subject of a callout, Exim crashed because it tried to
3819 read the rcpt_include_affixes from the non-existent transport. Now it
3820 just assumes that the setting of that option is false. This bug was
3821 introduced by 4.51/PH/31.
3823 PH/28 Changed -d+all to exclude +memory, because that information is very
3824 rarely of interest, but it makes the output a lot bigger. People tend to
3825 do -d+all out of habit.
3827 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3828 code in os-type was giving problems when libc.so lives in lib64, like on
3831 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3832 aren't the modern standard, and it seems that some systems' include files
3833 don't always have them. Exim was already checking for some of the newer
3834 ones like T_AAAA, and defining it itself. I've added checks for all the
3835 record types that Exim uses.
3837 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3838 not automatically generating a new one, as it is supposed to. This
3839 prevented TLS from working. If the file did exist, but contained invalid
3840 data, a new version was generated, as expected. It was only the case of a
3841 non-existent file that was broken.
3843 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3844 with a change in libdomainkeys > 0.64.
3846 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3847 from DNS. If the selector record carries the flag, it now has
3848 precedence over the domain-wide flag.
3850 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3852 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3853 the use of a port name that isn't defined in /etc/services) occurred, the
3854 message was deferred as in a normal delivery, and thus remained on the
3855 spool, instead of being failed because of the mua_wrapper setting. This
3856 is now fixed, and I tidied up some of the mua_wrapper messages at the
3859 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3860 the messages in a hash of arrays rather than using individual hashes.
3861 This is a bit cleaner and results in dramatic memory savings, albeit
3862 at a slight CPU cost.
3864 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3865 as requested by Marc Sherman.
3867 SC/10 Eximstats: added histograms for user specified patterns as requested
3870 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3872 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3873 fopen() in the content-scanning modules that did not already have it.
3879 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3880 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3882 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3884 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3886 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3887 to test Sieve filters that use "vacation".
3889 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3890 that changes the way the GnuTLS parameters are stored in the cache file.
3891 The new format can be generated externally. For backward compatibility,
3892 if the data in the cache doesn't make sense, Exim assumes it has read an
3893 old-format file, and it generates new data and writes a new file. This
3894 means that you can't go back to an older release without removing the
3897 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3898 work if there are any delivery delays because "one_time" forces the
3899 parent to be marked "delivered", so its unseen clone is never tried
3900 again. For this reason, Exim now forbids the simultaneous setting of
3903 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3904 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3905 entry if you want to know the details. The fix, however, neglected to
3906 consider the case when local delivery batching is involved. The test for
3907 "previously delivered" was not happening when checking to see if an
3908 address could be batched with a previous (undelivered) one; under
3909 certain circumstances this could lead to multiple deliveries to the same
3912 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3913 in its include files, and this causes problems building Exim.
3915 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3916 header_syntax) but Exim was just ignoring anything given after a slash.
3917 In particular, this caused confusion with an attempt to use "verify =
3918 reverse_host_lookup/defer_ok". An error is now given when options are
3919 supplied for verify items that do not have them. (Maybe reverse_host_
3920 lookup should have a defer_ok option, but that's a different point.)
3922 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3923 defined by RFC 821) to 2048, because there were problems with some AUTH
3924 commands, and RFC 1869 says the size should be increased for extended
3925 SMTP commands that take arguments.
3927 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3930 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3931 "unknown" error; now it says that the functionality isn't in the binary.
3933 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3934 an address' error message when a string expansion fails (syntax or
3935 whatever). Otherwise the password may appear in the log. Following change
3936 PH/42 below, there is no longer a chance of it appearing in a bounce
3939 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3941 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3942 of its addresses was ever tried. (Bugzilla bug #2.)
3944 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3945 the result incorrectly in the debug output. (It correctly added a newline
3946 to what was transported.)
3948 TF/01 Added $received_time.
3950 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3951 commented out examples of how to interface to a virus scanner and to
3952 SpamAssassin. Also added commented examples of av_scanner and
3953 spamd_address settings.
3955 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3956 and controls are allowed in which ACLs. There were a couple of minor
3957 errors. Some of the entries in the conditions table (which is a table of
3958 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3959 negation of where the condition IS allowed.
3961 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3963 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3964 header file does not have a version number, so I've had to invent a new
3965 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3966 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3967 radiusclient), but it was contributed by a Radius user.
3969 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3970 files or directories, for OpenSSL.
3972 PH/19 When an Exim process that is running as root has to create an Exim log
3973 file, it does so in a subprocess that runs as exim:exim so as to get the
3974 ownership right at creation (otherwise, other Exim processes might see
3975 the file with the wrong ownership). There was no test for failure of this
3976 fork() call, which would lead to the process getting stuck as it waited
3977 for a non-existent subprocess. Forks do occasionally fail when resources
3978 run out. I reviewed all the other calls to fork(); they all seem to check
3981 PH/20 When checking for unexpected SMTP input at connect time (before writing
3982 the banner), Exim was not dealing correctly with a non-positive return
3983 from the read() function. If the client had disconnected by this time,
3984 the result was a log entry for a synchronization error with an empty
3985 string after "input=" when read() returned zero. If read() returned -1
3986 (an event I could not check), uninitialized data bytes were printed.
3987 There were reports of junk text (parts of files, etc) appearing after
3990 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3992 PH/22 Added support for macro redefinition, and (re)definition in between
3993 driver and ACL definitions.
3995 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3996 forgetting to use the resulting value; it was using the unexpanded value.
3998 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3999 hadn't been configured. The fix is from Juergen Kreileder, who
4000 understands it better than I do:
4002 "Here's what I see happening with three configured cyrus_sasl
4003 authenticators configured (plain, login, cram-md5):
4005 On startup auth_cyrus_sasl_init() gets called for each of these.
4006 This means three calls to sasl_listmech() without a specified mech_list.
4007 => SASL tests which mechs of all available mechs actually work
4008 => three warnings about OTP not working
4009 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4011 With the patch, sasl_listmech() also gets called three times. But now
4012 SASL's mech_list option is set to the server_mech specified in the the
4013 authenticator. Or in other words, the answer from sasl_listmech()
4014 gets limited to just the mech you're testing for (which is different
4016 => the return list contains just 'plain' or 'login', 'cram-md5' or
4017 nothing depending on the value of ob->server_mech.
4019 I've just tested the patch: Authentication still works fine,
4020 unavailable mechs specified in the exim configuration are still
4021 caught, and the auth.log warnings about OTP are gone."
4023 PH/25 When debugging is enabled, the contents of the command line are added
4024 to the debugging output, even when log_selector=+arguments is not
4027 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4028 answer is "GNU", and only if the return is "GNU/something" is the answer
4031 PH/27 $acl_verify_message is now set immediately after the failure of a
4032 verification in an ACL, and so is available in subsequent modifiers. In
4033 particular, the message can be preserved by coding like this:
4035 warn !verify = sender
4036 set acl_m0 = $acl_verify_message
4038 Previously, $acl_verify_message was set only while expanding "message"
4039 and "log_message" when a very denied access.
4041 PH/28 Modified OS/os.c-Linux with
4043 -#ifndef OS_LOAD_AVERAGE
4044 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4046 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4047 nomenclature these days.)
4049 PH/29 Installed patch from the Sieve maintainer that adds the options
4050 sieve_useraddress and sieve_subaddress to the redirect router.
4052 PH/30 In these circumstances:
4053 . Two addresses routed to the same list of hosts;
4054 . First host does not offer TLS;
4055 . First host accepts first address;
4056 . First host gives temporary error to second address;
4057 . Second host offers TLS and a TLS session is established;
4058 . Second host accepts second address.
4059 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4060 and peerdn, if requested) that were in fact used only for the second
4063 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4064 attention to any local part prefix or suffix that was matched by the
4065 router that accepted the address. It now behaves in the same way as it
4066 does for delivery: the affixes are removed from the local part unless
4067 rcpt_include_affixes is set on the transport.
4069 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4070 timeout during the DATA phase of an incoming message.
4072 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4073 applied a patch sanctioned by the Sieve maintainer.
4075 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4076 the uid or gid is negative. A case of a negative gid caused this to be
4077 noticed. The fix allows for either to be negative.
4079 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4080 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4083 PH/36 The change PH/12 above was broken. Fixed it.
4085 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4086 the grounds that routing the same address twice would always produce the
4087 same answer. This might have been true once, but it is certainly no
4088 longer true now. Routing a child address may depend on the previous
4089 routing that produced that child. Some complicated redirection strategies
4090 went wrong when messages had multiple recipients, and made Exim's
4091 behaviour dependent on the order in which the addresses were given.
4093 I have moved the duplicate checking until after the routing is complete.
4094 Exim scans the addresses that are assigned to local and remote
4095 transports, and removes any duplicates. This means that more work will be
4096 done, as duplicates will always all be routed, but duplicates are
4097 presumably rare, so I don't expect this is of any significance.
4099 For deliveries to pipes, files, and autoreplies, the duplicate checking
4100 still happens during the routing process, since they are not going to be
4103 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4104 It corrects a timeout issue with spamd. This is Ian's comment: "The
4105 background is that sometimes spamd either never reads data from a
4106 connection it has accepted, or it never writes response data. The exiscan
4107 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4108 blindly assumes that writes won't block so it may never time out."
4110 PH/39 Allow G after quota size as well as K and M.
4112 PH/40 The value set for $authenticated_id in an authenticator may not contain
4113 binary zeroes or newlines because the value is written to log lines and
4114 to spool files. There was no check on this. Now the value is run through
4115 the string_printing() function so that such characters are converted to
4116 printable escape sequences.
4118 PH/41 $message_linecount is a new variable that contains the total number of
4119 lines in the message. Compare $body_linecount, which is the count for the
4122 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4123 bounce and delay warning messages, except in certain special cases, which
4126 (a) An SMTP error message from a remote host;
4127 (b) A message specified in a :fail: redirection;
4128 (c) A message specified in a "fail" command in a system filter;
4129 (d) A message specified in a FAIL return from the queryprogram router;
4130 (e) A message specified by the cannot_route_message router option.
4132 In these cases only, Exim does include the error details in bounce and
4133 warning messages. There are also a few cases where bland messages such
4134 as "unrouteable address" or "local delivery error" are given.
4136 PH/43 $value is now also set for the "else" part of a ${run expansion.
4138 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4139 being worked on, but at least Exim now implements the latest version to
4142 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4143 process to complete was treated as a delivery failure, a timeout while
4144 writing the message to the pipe was logged, but erroneously treated as a
4145 successful delivery. Such timeouts include transport filter timeouts. For
4146 consistency with the overall process timeout, these timeouts are now
4147 treated as errors, giving rise to delivery failures by default. However,
4148 there is now a new Boolean option for the pipe transport called
4149 timeout_defer, which, if set TRUE, converts the failures into defers for
4150 both kinds of timeout. A transport filter timeout is now identified in
4153 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4154 systems where "make" and "gmake" are different, calling "gmake" at top
4155 level broke things. I've arranged for the value of $(MAKE) to be passed
4156 from the Makefile to this script so that it can call the same version of
4160 A note about Exim versions 4.44 and 4.50
4161 ----------------------------------------
4163 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4164 changes of various kinds. As a consequence, a big documentation update was
4165 needed. This delayed the release for rather longer than seemed good, especially
4166 in the light of a couple of (minor) security issues. Therefore, the changes
4167 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4168 release. So 4.44 and 4.50 are in effect two different branches that both start
4171 I have left the 4.50 change log unchanged; it contains all the changes since
4172 4.43. The change log for 4.44 is below; many of its items are identical to
4173 those for 4.50. This seems to be the most sensible way to preserve the
4174 historical information.
4180 1. Minor wording change to the doc/README.SIEVE file.
4182 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4183 computation of the current number of files was incorrect.
4185 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4186 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4189 4. Give more explanation in the error message when the command for a transport
4190 filter fails to execute.
4192 5. There are several places where Exim runs a non-Exim command in a
4193 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4194 was being done only for the command run by the queryprogram router. It is
4195 now done for all such subprocesses. The other cases are: ${run, transport
4196 filters, and the commands run by the lmtp and pipe transports.
4198 6. Added CONFIGURE_GROUP build-time option.
4200 7. Some older OS have a limit of 256 on the maximum number of file
4201 descriptors. Exim was using setrlimit() to set 1000 as a large value
4202 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4203 systems. I've change it so that if it can't get 1000, it tries for 256.
4205 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4206 was an oversight, and furthermore, ever since the addition of extra
4207 controls (e.g. 4.43/32), the checks on when to allow different forms of
4208 "control" were broken. There should now be diagnostics for all cases when a
4209 control that does not make sense is encountered.
4211 9. Added the /retain_sender option to "control=submission".
4213 10. $recipients is now available in the predata ACL (oversight).
4215 11. Tidy the search cache before the fork to do a delivery from a message
4216 received from the command line. Otherwise the child will trigger a lookup
4217 failure and thereby defer the delivery if it tries to use (for example) a
4218 cached ldap connection that the parent has called unbind on.
4220 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4221 of $address_data from the recipient verification was clobbered by the
4222 sender verification.
4224 13. The value of address_data from a sender verification is now available in
4225 $sender_address_data in subsequent conditions in the ACL statement.
4227 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4229 15. Added a new option "connect=<time>" to callout options, to set a different
4232 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4233 was its contents. (It was OK if the option was not defined at all.)
4235 17. A "Completed" log line is now written for messages that are removed from
4236 the spool by the -Mrm option.
4238 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4239 information about exactly what failed.
4241 19. Added -dd to debug only the daemon process.
4243 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4244 handles timeouts, both on the server side and network timeouts. Renamed the
4245 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4247 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4248 It is now set to "smtps".
4250 22. $host_address is now set to the target address during the checking of
4251 ignore_target_hosts.
4253 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4254 being passed; this would have caused $sender_host_name to have been used if
4255 matching the list had actually called for a host name (not very likely,
4256 since this list is usually IP addresses). A host name is now passed as
4259 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4260 code that specifies a non-restarting handler (typically sigaction() in
4261 modern systems) in an attempt to fix a rare and obscure crash bug.
4263 25. Narrowed the window for a race in the daemon that could cause it to ignore
4264 SIGCHLD signals. This is not a major problem, because they are used only to
4265 wake it up if nothing else does.
4267 26. A malformed maildirsize file could cause Exim to calculate negative values
4268 for the mailbox size or file count. Odd effects could occur as a result.
4269 The maildirsize information is now recalculated if the size or filecount
4272 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4273 support for a long time. Removed HAVE_SYS_VFS_H.
4275 28. Installed the latest version of exipick from John Jetmore.
4277 29. In an address list, if the pattern was not a regular expression, an empty
4278 subject address (from a bounce message) matched only if the pattern was an
4279 empty string. Non-empty patterns were not even tested. This was the wrong
4280 because it is perfectly reasonable to use an empty address as part of a
4281 database query. An empty address is now tested by patterns that are
4282 lookups. However, all the other forms of pattern expect the subject to
4283 contain a local part and a domain, and therefore, for them, an empty
4284 address still always fails if the pattern is not itself empty.
4286 30. Exim went into a mad DNS loop when attempting to do a callout where the
4287 host was specified on an smtp transport, and looking it up yielded more
4288 than one IP address.
4290 31. Re-factored the code for checking spool and log partition space into a
4291 function that finds that data and another that does the check. The former
4292 is then used to implement four new variables: $spool_space, $log_space,
4293 $spool_inodes, and $log_inodes.
4295 32. The RFC2047 encoding function was originally intended for short strings
4296 such as real names; it was not keeping to the 75-character limit for
4297 encoded words that the RFC imposes. It now respects the limit, and
4298 generates multiple encoded words if necessary. To be on the safe side, I
4299 have increased the buffer size for the ${rfc2047: expansion operator from
4302 33. It is now permitted to omit both strings after an "if" condition; if the
4303 condition is true, the result is "true". As before, when the second string
4304 is omitted, a false condition yields an empty string. This makes it less
4305 cumbersome to write custom ACL and router conditions.
4307 34. Failure to deliver a bounce message always caused it to be frozen, even if
4308 there was an errors_to setting on the router. The errors_to setting is now
4311 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4312 canonical form (fully expanded) before being placed in
4313 $sender_host_address.
4315 36. The table in the code that translates DNS record types into text (T_A to
4316 "A" for instance) was missing entries for NS and CNAME. It is just possible
4317 that this could have caused confusion if both these types were looked up
4318 for the same domain, because the text type is used as part of Exim's
4319 per-process caching. But the chance of anyone hitting this buglet seems
4322 37. The dnsdb lookup has been extended in a number of ways.
4324 (1) There is a new type, "zns", which walks up the domain tree until it
4325 finds some nameserver records. It should be used with care.
4327 (2) There is a new type, "mxh", which is like "mx" except that it returns
4328 just the host names, not the priorities.
4330 (3) It is now possible to give a list of domains (or IP addresses) to be
4331 looked up. The behaviour when one of the lookups defers can be
4332 controlled by a keyword.
4334 (4) It is now possible to specify the separator character for use when
4335 multiple records are returned.
4337 38. The dnslists ACL condition has been extended: it is now possible to supply
4338 a list of IP addresses and/or domains to be looked up in a particular DNS
4341 39. Added log_selector=+queue_time_overall.
4343 40. When running the queue in the test harness, wait just a tad after forking a
4344 delivery process, to get repeatability of debugging output.
4346 41. Include certificate and key file names in error message when GnuTLS fails
4347 to set them up, because the GnuTLS error message doesn't include the name
4348 of the failing file when there is a problem reading it.
4350 42. Allow both -bf and -bF in the same test run.
4352 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4354 44. The "Exiscan patch" is now merged into the mainline Exim source.
4356 45. Sometimes the final signoff response after QUIT could fail to get
4357 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4358 < 0 before doing a fflush(). This bug looks as though it goes back to the
4359 introduction of TLS in release 3.20, but "sometimes" must have been rare
4360 because the tests only now provoked it.
4362 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4363 (this can affect the format of dates).
4365 47. exim_tidydb, when checking for the continued existence of a message for
4366 which it has found a message-specific retry record, was not finding
4367 messages that were in split spool directories. Consequently, it was
4368 deleting retry records that should have stayed in existence.
4370 48. Steve fixed some bugs in eximstats.
4372 49. The SPA authentication driver was not abandoning authentication and moving
4373 on to the next authenticator when an expansion was forced to fail,
4374 contradicting the general specification for all authenticators. Instead it
4375 was generating a temporary error. It now behaves as specified.
4377 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4378 (the order specifies the preference for clients). The order is now AES256,
4379 AES128, 3DES, ARCFOUR128.
4381 51. Small patch to Sieve code - explicitly set From: when generating an
4384 52. Exim crashed if a remote delivery caused a very long error message to be
4385 recorded - for instance if somebody sent an entire SpamAssassin report back
4386 as a large number of 550 error lines. This bug was coincidentally fixed by
4387 increasing the size of one of Exim's internal buffers (big_buffer) that
4388 happened as part of the Exiscan merge. However, to be on the safe side, I
4389 have made the code more robust (and fixed the comments that describe what
4392 53. Now that there can be additional text after "Completed" in log lines (if
4393 the queue_time_overall log selector is set), a one-byte patch to exigrep
4394 was needed to allow it to recognize "Completed" as not the last thing in
4397 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4398 patch that reportedly fixes this has been added. I am not expert enough to
4399 create a test for it. This is what the patch creator wrote:
4401 "I found a little strange behaviour of ldap code when working with
4402 Windows 2003 AD Domain, where users was placed in more than one
4403 Organization Units. When I tried to give exim partial DN, the exit code
4404 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4405 But simultaneously result of request was absolutely normal ldap result,
4406 so I produce this patch..."
4408 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4409 REFERENCE, so I have modified the code to exclude the patch when that macro
4412 55. Some experimental protocols are using DNS PTR records for new purposes. The
4413 keys for these records are domain names, not reversed IP addresses. The
4414 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4415 leaves it alone. Component reversal etc. now happens only for IP addresses.
4418 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4420 57. Double the size of the debug message buffer (to 2048) so that more of very
4421 long debug lines gets shown.
4423 58. The exicyclog utility now does better if the number of log files to keep
4424 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4426 59. Two changes related to the smtp_active_hostname option:
4428 (1) $smtp_active_hostname is now available as a variable.
4429 (2) The default for smtp_banner uses $smtp_active_hostname instead
4430 of $primary_hostname.
4432 60. The host_aton() function is supposed to be passed a string that is known
4433 to be a valid IP address. However, in the case of IPv6 addresses, it was
4434 not checking this. This is a hostage to fortune. Exim now panics and dies
4435 if the condition is not met. A case was found where this could be provoked
4436 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4437 components; fortuitously, this particular loophole had already been fixed
4438 by change 4.50/55 above.
4440 If there are any other similar loopholes, the new check in host_aton()
4441 itself should stop them being exploited. The report I received stated that
4442 data on the command line could provoke the exploit when Exim was running as
4443 exim, but did not say which command line option was involved. All I could
4444 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4445 running as the user.
4448 61. There was a buffer overflow vulnerability in the SPA authentication code
4449 (which came originally from the Samba project). I have added a test to the
4450 spa_base64_to_bits() function which I hope fixes it.
4453 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4454 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4456 63. The daemon start-up calls getloadavg() while still root for those OS that
4457 need the first call to be done as root, but it missed one case: when
4458 deliver_queue_load_max is set with deliver_drop_privilege. This is
4459 necessary for the benefit of the queue runner, because there is no re-exec
4460 when deliver_drop_privilege is set.
4462 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4463 This has been fixed.
4465 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4466 was in use, was not putting the data itself into the right store pool;
4467 consequently, it could be overwritten for a subsequent message in the same
4468 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4471 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4473 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4474 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4475 the function were treating the return as a boolean value, which happened to
4476 work because 0=false and not-0=true, but is not correct code.
4478 68. The host_aton() function was not handling scoped IPv6 addresses (those
4479 with, for example, "%eth0" on the end) correctly.
4481 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4482 negated items (that is, ~something) in unsigned ints. Some compilers
4483 apparently mutter when there is no cast.
4485 70. If an address verification called from an ACL failed, and did not produce a
4486 user-specific message (i.e. there was only a "system" message), nothing was
4487 put in $acl_verify_message. In this situation, it now puts the system
4490 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4491 session; change 4.31/43 added the unwanted input to the log line - except
4492 that it did not do this in the start of session case. It now does.
4494 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4495 This is wrong and can cause the other end to generate a synchronization
4496 error if it is another Exim or anything else that does the synchronization
4497 check. A QUIT command is no longer sent after a timeout.
4499 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4500 during host lookups.
4502 74. The defer_ok option of callout verification was not working if it was used
4503 when verifying addresses in header lines, that is, for this case:
4505 verify = header_sender/callout=defer_ok
4507 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4508 those file descriptors could be used for SMTP connections. If anything
4509 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4510 could be sent to the SMTP client, causing chaos. The daemon now opens
4511 stdin, stdout, and stderr to /dev/null when it puts itself into the
4514 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4515 log by default. The user can override this with suitable Perl magic.
4517 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4518 the log message when discard triggers, was not working for the DATA ACL or
4519 for the non-SMTP ACL.
4521 78. Error message wording change in sieve.c.
4523 79. If smtp_accept_max_per_host was set, the number of connections could be
4524 restricted to fewer than expected, because the daemon was trying to set up
4525 a new connection before checking whether the processes handling previous
4526 connections had finished. The check for completed processes is now done
4527 earlier. On busy systems, this bug wouldn't be noticed because something
4528 else would have woken the daemon, and it would have reaped the completed
4531 80. If a message was submitted locally by a user whose login name contained one
4532 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4533 It caused a spool format error. I have fixed the spool reading code. A
4534 related problem was that the "from" clause in the Received: line became
4535 illegal because of the space(s). It is now covered by ${quote_local_part.
4537 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4540 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4542 83. Patch from Sieve maintainer to fix unterminated string problem in
4543 "vacation" handling.
4545 84. Some minor changes to the Linux configuration files to help with other
4546 OS variants using glibc.
4548 85. One more patch for Sieve to update vacation handling to latest spec.
4551 ----------------------------------------------------
4552 See the note above about the 4.44 and 4.50 releases.
4553 ----------------------------------------------------
4559 1. Change 4.43/35 introduced a bug that caused file counts to be
4560 incorrectly computed when quota_filecount was set in an appendfile
4563 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4564 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4567 3. Give more explanation in the error message when the command for a transport
4568 filter fails to execute.
4570 4. There are several places where Exim runs a non-Exim command in a
4571 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4572 was being done only for the command run by the queryprogram router. It is
4573 now done for all such subprocesses. The other cases are: ${run, transport
4574 filters, and the commands run by the lmtp and pipe transports.
4576 5. Some older OS have a limit of 256 on the maximum number of file
4577 descriptors. Exim was using setrlimit() to set 1000 as a large value
4578 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4579 systems. I've change it so that if it can't get 1000, it tries for 256.
4581 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4582 was an oversight, and furthermore, ever since the addition of extra
4583 controls (e.g. 4.43/32), the checks on when to allow different forms of
4584 "control" were broken. There should now be diagnostics for all cases when a
4585 control that does not make sense is encountered.
4587 7. $recipients is now available in the predata ACL (oversight).
4589 8. Tidy the search cache before the fork to do a delivery from a message
4590 received from the command line. Otherwise the child will trigger a lookup
4591 failure and thereby defer the delivery if it tries to use (for example) a
4592 cached ldap connection that the parent has called unbind on.
4594 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4595 of $address_data from the recipient verification was clobbered by the
4596 sender verification.
4598 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4599 was its contents. (It was OK if the option was not defined at all.)
4601 11. A "Completed" log line is now written for messages that are removed from
4602 the spool by the -Mrm option.
4604 12. $host_address is now set to the target address during the checking of
4605 ignore_target_hosts.
4607 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4608 being passed; this would have caused $sender_host_name to have been used if
4609 matching the list had actually called for a host name (not very likely,
4610 since this list is usually IP addresses). A host name is now passed as
4613 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4614 code that specifies a non-restarting handler (typically sigaction() in
4615 modern systems) in an attempt to fix a rare and obscure crash bug.
4617 15. Narrowed the window for a race in the daemon that could cause it to ignore
4618 SIGCHLD signals. This is not a major problem, because they are used only to
4619 wake it up if nothing else does.
4621 16. A malformed maildirsize file could cause Exim to calculate negative values
4622 for the mailbox size or file count. Odd effects could occur as a result.
4623 The maildirsize information is now recalculated if the size or filecount
4626 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4627 support for a long time. Removed HAVE_SYS_VFS_H.
4629 18. Updated exipick to current release from John Jetmore.
4631 19. Allow an empty sender to be matched against a lookup in an address list.
4632 Previously the only cases considered were a regular expression, or an
4635 20. Exim went into a mad DNS lookup loop when doing a callout where the
4636 host was specified on the transport, if the DNS lookup yielded more than
4639 21. The RFC2047 encoding function was originally intended for short strings
4640 such as real names; it was not keeping to the 75-character limit for
4641 encoded words that the RFC imposes. It now respects the limit, and
4642 generates multiple encoded words if necessary. To be on the safe side, I
4643 have increased the buffer size for the ${rfc2047: expansion operator from
4646 22. Failure to deliver a bounce message always caused it to be frozen, even if
4647 there was an errors_to setting on the router. The errors_to setting is now
4650 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4651 canonical form (fully expanded) before being placed in
4652 $sender_host_address.
4654 24. Updated eximstats to version 1.33
4656 25. Include certificate and key file names in error message when GnuTLS fails
4657 to set them up, because the GnuTLS error message doesn't include the name
4658 of the failing file when there is a problem reading it.
4660 26. Expand error message when OpenSSL has problems setting up cert/key files.
4663 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4664 (this can affect the format of dates).
4666 28. exim_tidydb, when checking for the continued existence of a message for
4667 which it has found a message-specific retry record, was not finding
4668 messages that were in split spool directories. Consequently, it was
4669 deleting retry records that should have stayed in existence.
4671 29. eximstats updated to version 1.35
4672 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4673 1.35 - bugfix such that pie charts by volume are generated correctly
4675 30. The SPA authentication driver was not abandoning authentication and moving
4676 on to the next authenticator when an expansion was forced to fail,
4677 contradicting the general specification for all authenticators. Instead it
4678 was generating a temporary error. It now behaves as specified.
4680 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4681 (the order specifies the preference for clients). The order is now AES256,
4682 AES128, 3DES, ARCFOUR128.
4684 31. Small patch to Sieve code - explicitly set From: when generating an
4687 32. Exim crashed if a remote delivery caused a very long error message to be
4688 recorded - for instance if somebody sent an entire SpamAssassin report back
4689 as a large number of 550 error lines. This bug was coincidentally fixed by
4690 increasing the size of one of Exim's internal buffers (big_buffer) that
4691 happened as part of the Exiscan merge. However, to be on the safe side, I
4692 have made the code more robust (and fixed the comments that describe what
4695 33. Some experimental protocols are using DNS PTR records for new purposes. The
4696 keys for these records are domain names, not reversed IP addresses. The
4697 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4698 leaves it alone. Component reversal etc. now happens only for IP addresses.
4701 34. The host_aton() function is supposed to be passed a string that is known
4702 to be a valid IP address. However, in the case of IPv6 addresses, it was
4703 not checking this. This is a hostage to fortune. Exim now panics and dies
4704 if the condition is not met. A case was found where this could be provoked
4705 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4706 components; fortuitously, this particular loophole had already been fixed
4707 by change 4.50/55 or 4.44/33 above.
4709 If there are any other similar loopholes, the new check in host_aton()
4710 itself should stop them being exploited. The report I received stated that
4711 data on the command line could provoke the exploit when Exim was running as
4712 exim, but did not say which command line option was involved. All I could
4713 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4714 running as the user.
4717 35. There was a buffer overflow vulnerability in the SPA authentication code
4718 (which came originally from the Samba project). I have added a test to the
4719 spa_base64_to_bits() function which I hope fixes it.
4722 36. The daemon start-up calls getloadavg() while still root for those OS that
4723 need the first call to be done as root, but it missed one case: when
4724 deliver_queue_load_max is set with deliver_drop_privilege. This is
4725 necessary for the benefit of the queue runner, because there is no re-exec
4726 when deliver_drop_privilege is set.
4728 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4729 was in use, was not putting the data itself into the right store pool;
4730 consequently, it could be overwritten for a subsequent message in the same
4731 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4734 38. Sometimes the final signoff response after QUIT could fail to get
4735 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4736 < 0 before doing a fflush(). This bug looks as though it goes back to the
4737 introduction of TLS in release 3.20, but "sometimes" must have been rare
4738 because the tests only now provoked it.
4744 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4745 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4746 Now it returns an integer. A number of calls were still expecting a T/F
4747 return. Fortuitously, in all cases, the tests worked in OK situations,
4748 which is the norm. However, things would have gone wrong on any write
4749 failures on the smtp file descriptor. This function is used when sending
4750 messages over SMTP and also when doing verify callouts.
4752 2. When Exim is called to do synchronous delivery of a locally submitted
4753 message (the -odf or -odi options), it no longer closes stderr before doing
4756 3. Implemented the mua_wrapper option.
4758 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4760 5. Implemented the functions header_remove(), header_testname(),
4761 header_add_at_position(), and receive_remove_recipient(), and exported them
4764 6. If an ACL "warn" statement specified the addition of headers, Exim already
4765 inserted X-ACL-Warn: at the start if there was no header name. However, it
4766 was not making this test for the second and subsequent header lines if
4767 there were newlines in the string. This meant that an invalid header could
4768 be inserted if Exim was badly configured.
4770 7. Allow an ACL "warn" statement to add header lines at the start or after all
4771 the Received: headers, as well as at the end.
4773 8. Added the rcpt_4xx retry error code.
4775 9. Added postmaster_mailfrom=xxx to callout verification option.
4777 10. Added mailfrom=xxxx to the callout verification option, for verify=
4780 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4781 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4783 12. Inserted some casts to stop certain compilers warning when using pointer
4784 differences as field lengths or precisions in printf-type calls (mostly
4785 affecting debugging statements).
4787 13. Added optional readline() support for -be (dynamically loaded).
4789 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4790 same clock tick as a message's arrival, so that its received time was the
4791 same as the "first fail" time on the retry record, and that message
4792 remained on the queue past the ultimate address timeout, every queue runner
4793 would try a delivery (because it was past the ultimate address timeout) but
4794 after another failure, the ultimate address timeout, which should have then
4795 bounced the address, did not kick in. This was a "< instead of <=" error;
4796 in most cases the first failure would have been in the next clock tick
4797 after the received time, and all would be well.
4799 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4800 being recognized when the domain list was tested by the match_domain
4801 condition in an expansion string.
4803 16. Added the ${str2b64: operator.
4805 17. Exim was always calling setrlimit() to set a large limit for the number of
4806 processes, without checking whether the existing limit was already
4807 adequate. (It did check for the limit on file descriptors.) Furthermore,
4808 errors from getrlimit() and setrlimit() were being ignored. Now they are
4809 logged to the main and panic logs, but Exim does carry on, to try to do its
4810 job under whatever limits there are.
4812 18. Imported PCRE 5.0.
4814 19. Trivial typo in log message " temporarily refused connection" (the leading
4817 20. If the log selector return_path_on_delivery was set and an address was
4818 redirected to /dev/null, the delivery process crashed because it assumed
4819 that a return path would always be set for a "successful" delivery. In this
4820 case, the whole delivery is bypassed as an optimization, and therefore no
4823 21. Internal re-arrangement: the function for sending a challenge and reading
4824 a response while authentication was assuming a zero-terminated challenge
4825 string. It's now changed to take a pointer and a length, to allow for
4826 binary data in such strings.
4828 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4830 23. Exim was not respecting finduser_retries when seeking the login of the
4831 uid under which it was called; it was always trying 10 times. (The default
4832 setting of finduser_retries is zero.) Also, it was sleeping after the final
4833 failure, which is pointless.
4835 24. Implemented tls_on_connect_ports.
4837 25. Implemented acl_smtp_predata.
4839 26. If the domain in control=submission is set empty, Exim assumes that the
4840 authenticated id is a complete email address when it generates From: or
4841 Sender: header lines.
4843 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4844 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4845 chown and chgrp in /bin and hostname in /usr/bin.
4847 28. Exim was keeping the "process log" file open after each use, just as it
4848 does for the main log. This opens the possibility of it remaining open for
4849 long periods when the USR1 signal hits a daemon. Occasional processlog
4850 errors were reported, that could have been caused by this. Anyway, it seems
4851 much more sensible not to leave this file open at all, so that is what now
4854 29. The long-running daemon process does not normally write to the log once it
4855 has entered its main loop, and it closes the log before doing so. This is
4856 so that log files can straightforwardly be renamed and moved. However,
4857 there are a couple of unusual error situations where the daemon does write
4858 log entries, and I had neglected to close the log afterwards.
4860 30. The text of an SMTP error response that was received during a remote
4861 delivery was being truncated at 512 bytes. This is too short for some of
4862 the long messages that one sometimes sees. I've increased the limit to
4865 31. It is now possible to make retry rules that apply only when a message has a
4866 specific sender, in particular, an empty sender.
4868 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4869 it possible to be selective about when SMTP synchronization is enforced.
4871 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4873 32. Implemented hosts_connection_nolog.
4875 33. Added an ACL for QUIT.
4877 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4880 35. Added mailbox_size and mailbox_filecount to appendfile.
4882 36. Added control = no_multiline_responses to ACLs.
4884 37. There was a bug in the logic of the code that waits for the clock to tick
4885 in the case where the clock went backwards by a substantial amount such
4886 that the microsecond fraction of "now" was more than the microsecond
4887 fraction of "then" (but the whole seconds number was less).
4889 38. Added support for the libradius Radius client library this is found on
4890 FreeBSD (previously only the radiusclient library was supported).
4896 1. When certain lookups returned multiple values in the form name=value, the
4897 quoting of the values was not always being done properly. Specifically:
4898 (a) If the value started with a double quote, but contained no whitespace,
4900 (b) If the value contained whitespace other than a space character (i.e.
4901 tabs or newlines or carriage returns) it was not quoted.
4902 This fix has been applied to the mysql and pgsql lookups by writing a
4903 separate quoting function and calling it from the lookup code. The fix
4904 should probably also be applied to nisplus, ibase and oracle lookups, but
4905 since I cannot test any of those, I have not disturbed their existing code.
4907 2. A hit in the callout cache for a specific address caused a log line with no
4908 reason for rejecting RCPT. Now it says "Previous (cached) callout
4909 verification failure".
4911 3. There was an off-by-one bug in the queryprogram router. An over-long
4912 return line was truncated at 256 instead of 255 characters, thereby
4913 overflowing its buffer with the terminating zero. As well as fixing this, I
4914 have increased the buffer size to 1024 (and made a note to document this).
4916 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4917 when Exim is waiting for an SMTP response from a remote server, Exim
4918 restarts its select() call on the socket, thereby resetting its timeout.
4919 This is not a problem when such interrupts are rare. Somebody set up a cron
4920 job to run exiwhat every 2 minutes, which is less than the normal select()
4921 timeout (5 or 10 minutes). This meant that the select() timeout never
4922 kicked in because it was always reset. I have fixed this by comparing the
4923 time when an interrupt arrives with the time at the start of the first call
4924 to select(). If more time than the timeout has elapsed, the interrupt is
4925 treated as a timeout.
4927 5. Some internal re-factoring in preparation for the addition of Sieve
4928 extensions (by MH). In particular, the "personal" test is moved to a
4929 separate function, and given an option for scanning Cc: and Bcc: (which is
4930 not set for Exim filters).
4932 6. When Exim created an email address using the login of the caller as the
4933 local part (e.g. when creating a From: or Sender: header line), it was not
4934 quoting the local part when it contained special characters such as @.
4936 7. Installed new OpenBSD configuration files.
4938 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4939 try to make them clearer.
4941 9. Callout options, other than the timeout value, were being ignored when
4942 verifying sender addresses in header lines. For example, when using
4944 verify = header_sender/callout=no_cache
4946 the cache was (incorrectly) being used.
4948 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4949 only the Cygwin environment.
4951 11. When return_path_on_delivery was set as a log selector, if different remote
4952 addresses in the same message used different return paths and parallel
4953 remote delivery occurred, the wrong values would sometimes be logged.
4954 (Whenever a remote delivery process finished, the return path value from
4955 the most recently started remote delivery process was logged.)
4957 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4958 lines when AUTH and/or TLS are in use. This is the "received protocol"
4959 field. Exim used to use "asmtp" for authenticated SMTP, without any
4960 indication (in the protocol name) for TLS use. Now it follows the RFC and
4961 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4962 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4963 names appear in log lines as well as in Received: header lines.
4965 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4966 extensions, and comparison tests, and to fix some bugs.
4968 14. Changes to the "personal" filter test:
4970 (1) The test was buggy in that it was just doing the equivalent of
4971 "contains" tests on header lines. For example, if a user's address was
4972 anne@some.where, the "personal" test would incorrectly be true for
4974 To: susanne@some.where
4976 This test is now done by extracting each address from the header in turn,
4977 and checking the entire address. Other tests that are part of "personal"
4978 are now done using regular expressions (for example, to check local parts
4979 of addresses in From: header lines).
4981 (2) The list of non-personal local parts in From: addresses has been
4982 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4983 taken from the Sieve specification recommendations.
4985 (3) If the message contains any header line starting with "List-" it is
4986 treated as non-personal.
4988 (4) The test for "circular" in the Subject: header line has been removed
4989 because it now seems ill-conceived.
4991 15. Minor typos in src/EDITME comments corrected.
4993 16. Installed latest exipick from John Jetmore.
4995 17. If headers_add on a router specified a text string that was too long for
4996 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4997 of string_sprintf() is now avoided.
4999 18. $message_body_size was not set (it was always zero) when running the DATA
5000 ACL and the local_scan() function.
5002 19. For the "mail" command in an Exim filter, no default was being set for
5003 the once_repeat time, causing a random time value to be used if "once" was
5004 specified. (If the value happened to be <= 0, no repeat happened.) The
5005 default is now 0s, meaning "never repeat". The "vacation" command was OK
5006 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5007 (I found it when inspecting the code).
5009 20. There is now an overall timeout for performing a callout verification. It
5010 defaults to 4 times the callout timeout, which applies to individual SMTP
5011 commands during the callout. The overall timeout applies when there is more
5012 than one host that can be tried. The timeout is checked before trying the
5013 next host. This prevents very long delays if there are a large number of
5014 hosts and all are timing out (e.g. when the network connections are timing
5015 out). The value of the overall timeout can be changed by specifying an
5016 additional sub-option for "callout", called "maxwait". For example:
5018 verify = sender/callout=5s,maxwait=20s
5020 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5021 to the end before writing, but this should make it even safer).
5023 22. Exim was forgetting that it had advertised PIPELINING for the second and
5024 subsequent messages on an SMTP connection. It was also not resetting its
5025 memory on STARTTLS and an internal HELO.
5027 23. When Exim logs an SMTP synchronization error within a session, it now
5028 records whether PIPELINING has been advertised or not.
5030 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5031 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5032 rather than long int.
5034 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5036 26. Added the never_mail option to autoreply.
5042 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5043 crash if the getsockname() call failed; this can happen if a connection is
5044 closed very soon after it is established. The problem was simply in the
5045 order in which certain operations were done, causing Exim to try to write
5046 to the SMTP stream before it had set up the file descriptor. The bug has
5047 been fixed by making things happen in the correct order.
5053 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5054 before the connection was closed, thus losing the rejection response.
5056 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5057 some early Solaris releases, but causes trouble in current releases where
5058 socklen_t is defined.
5060 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5063 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5066 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5067 that releasing the top of it at the end releases what was used for sub-
5068 expansions (unless the block got too big). However, discard this block if
5069 the first thing is a variable or header, so that we can use its block when
5070 it is dynamic (useful for very large $message_headers, for example).
5072 6. Lookups now cache *every* query, not just the most recent. A new, separate
5073 store pool is used for this. It can be recovered when all lookup caches are
5074 flushed. Lookups now release memory at the end of their result strings.
5075 This has involved some general refactoring of the lookup sources.
5077 7. Some code has been added to the store_xxx() functions to reduce the amount
5078 of flapping under certain conditions.
5080 8. log_incoming_interface used to affect only the <= reception log lines. Now
5081 it causes the local interface and port to be added to several more SMTP log
5082 lines, for example "SMTP connection from", and rejection lines.
5084 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5086 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5088 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5089 could be overwritten at the end of the current message (or the start of a
5090 new message if it was set in a HELO ACL). The value is now preserved for
5091 the duration of the SMTP connection.
5093 12. If a transport had a headers_rewrite setting, and a matching header line
5094 contained an unqualified address, that address was qualified, even if it
5095 did not match any rewriting rules. The underlying bug was that the values
5096 of the flags that permit the existence of unqualified sender and recipient
5097 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5098 non-local messages, and by -bnq for local messages) were not being
5099 preserved with the message after it was received.
5101 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5102 "next input=" as part of the text comprising the host identity instead of
5103 the correct text. The code was using the same buffer for two different
5104 strings. However, depending on which order the printing function evaluated
5105 its arguments, the bug did not always show up. Under Linux, for example, my
5106 test suite worked just fine.
5108 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5109 doesn't work with some older versions of Perl. It has been changed to "my",
5110 which in any case is probably the better facility to use.
5112 15. A really picky compiler found some instances of statements for creating
5113 error messages that either had too many or two few arguments for the format
5116 16. The size of the buffer for calls to the DNS resolver has been increased
5117 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5118 for addresses that have a lot of PTR records. This alleviates a problem; it
5119 does not fully solve it.
5121 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5122 buffer now truncates the list and logs the incident, which is the same
5123 action as happens when Exim is looking up a host name and its aliases.
5124 Previously in this situation something unpredictable would happen;
5125 sometimes it was "internal error: store_reset failed".
5127 18. If a server dropped the connection unexpectedly when an Exim client was
5128 using GnuTLS and trying to read a response, the client delivery process
5129 crashed while trying to generate an error log message.
5131 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5132 string, for example:
5134 warn message = H1: something\nH2: something
5136 the text was added as a single header line from Exim's point of view
5137 though it ended up OK in the delivered message. However, searching for the
5138 second and subsequent header lines using $h_h2: did not work. This has been
5139 fixed. Similarly, if a system filter added multiple headers in this way,
5140 the routers could not see them.
5142 20. Expanded the error message when iplsearch is called with an invalid key to
5143 suggest using net-iplsearch in a host list.
5145 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5146 ACLs are no longer actually imposed (and a message to that effect is
5149 22. If a "gecos" field in a passwd entry contained escaped characters, in
5150 particular, if it contained a \" sequence, Exim got it wrong when building
5151 a From: or a Sender: header from that name. A second bug also caused
5152 incorrect handling when an unquoted " was present following a character
5153 that needed quoting.
5155 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5156 was not being matched caselessly.
5158 24. Arranged for all hyphens in the exim.8 source to be escaped with
5161 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5162 properly. Recipient callout cache records were still being keyed to include
5163 the sender, even when use_sender was set false. This led to far more
5164 callouts that were necessary. The sender is no longer included in the key
5165 when use_sender is false.
5167 26. Added "control = submission" modifier to ACLs.
5169 27. Added the ${base62d: operator to decode base 62 numbers.
5171 28. dnsdb lookups can now access SRV records.
5173 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5174 the configuration file.
5176 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5177 (-v) mode. This makes the output for a verbose queue run more intelligible.
5179 31. Added a use_postmaster feature to recipient callouts.
5181 32. Added the $body_zerocount variable, containing the number of binary zero
5182 bytes in the message body.
5184 33. The time of last modification of the "new" subdirectory is now used as the
5185 "mailbox time last read" when there is a quota error for a maildir
5188 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5190 35. Added +ignore_unknown as a special item in host lists.
5192 36. Code for decoding IPv6 addresses in host lists is now included, even if
5193 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5194 address was recognized as an IP address, but was then not correctly decoded
5195 into binary, causing unexpected and incorrect effects when compared with
5202 1. Very minor rewording of debugging text in manualroute to say "list of
5203 hosts" instead of "hostlist".
5205 2. If verify=header_syntax was set, and a header line with an unqualified
5206 address (no domain) and a large number of spaces between the end of the
5207 name and the colon was received, the reception process suffered a buffer
5208 overflow, and (when I tested it) crashed. This was caused by some obsolete
5209 code that should have been removed. The fix is to remove it!
5211 3. When running in the test harness, delay a bit after writing a bounce
5212 message to get a bit more predictability in the log output.
5214 4. Added a call to search_tidyup() just before forking a reception process. In
5215 theory, someone could use a lookup in the expansion of smtp_accept_max_
5216 per_host which, without the tidyup, could leave open a database connection.
5218 5. Added the variables $recipient_data and $sender_data which get set from a
5219 lookup success in an ACL "recipients" or "senders" condition, or a router
5220 "senders" option, similar to $domain_data and $local_part_data.
5222 6. Moved the writing of debug_print from before to after the "senders" test
5225 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5226 problems for message scanning, either using a data ACL, or using
5227 local_scan() because the Received: header was not generated till after they
5228 were called (in order to set the time as the time of reception completion).
5229 I have revised the way this works. The header is now generated after the
5230 body is received, but before the ACL or local_scan() are called. After they
5231 are run, the timestamp in the header is updated.
5237 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5238 before starting a queue runner without re-exec. This happened only when
5239 deliver_drop_privilege was set or when the Exim user was set to root. The
5240 effect of the bug was that timeouts during subsequent deliveries caused
5241 crashes instead of being properly handled. The handler is now left at its
5242 default (and expected) setting.
5244 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5245 message, again when deliver_drop_privilege is set or Exim is run as root.
5246 The bug described in (1) was not present in this case, but the tidying up
5247 of the other signals was missing. I have made the two cases consistent.
5249 3. The ignore_target_hosts setting on a manualroute router was being ignored
5250 for hosts that were looked up using the /MX notation.
5252 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5255 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5256 operated on the sender address. After changing the $sender_address to <>
5257 for the sender address verify, Exim was re-instated it as the original
5258 (before rewriting) address, but remembering that it had rewritten it, so it
5259 wasn't rewriting it again. This bug also had the effect of breaking the
5260 sender address verification caching when the sender address was rewritten.
5262 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5263 This has been changed so that if the ip literal address matches
5264 ignore_target_hosts, the router declines.
5266 7. Added expansion conditions match_domain, match_address, and match_local_
5267 part (NOT match_host).
5269 8. The placeholder for the Received: header didn't have a length field set.
5271 9. Added code to Exim itself and to exim_lock to test for a specific race
5272 condition that could lead to file corruption when using MBX delivery. The
5273 issue is with the lockfile that is created in /tmp. If this file is removed
5274 after a process has opened it but before that process has acquired a lock,
5275 there is the potential for a second process to recreate the file and also
5276 acquire a lock. This could lead to two Exim processes writing to the file
5277 at the same time. The added code performs the same test as UW imapd; it
5278 checks after acquiring the lock that its file descriptor still refers to
5279 the same named file.
5281 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5282 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5285 11. Added the smtp_active_hostname option. If used, this will typically be made
5286 to depend on the incoming interface address. Because $interface_address is
5287 not set up until the daemon has forked a reception process, error responses
5288 that can happen earlier (such as "too many connections") no longer contain
5291 12. If an expansion in a condition on a "warn" statement fails because a lookup
5292 defers, the "warn" statement is abandoned, and the next ACL statement is
5293 processed. Previously this caused the whole ACL to be aborted.
5295 13. Added the iplsearch lookup type.
5297 14. Added ident_timeout as a log selector.
5299 15. Added tls_certificate_verified as a log selector.
5301 16. Added a global option tls_require_ciphers (compare the smtp transport
5302 option of the same name). This controls incoming TLS connections.
5304 17. I finally figured out how to make tls_require_ciphers do a similar thing
5305 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5306 before starting the TLS session.
5308 18. Tabs are now shown as \t in -bP output.
5310 19. If the log selector return_path_on_delivery was set, Exim crashed when
5311 bouncing a message because it had too many Received: header lines.
5313 20. If two routers both had headers_remove settings, and the first one included
5314 a superfluous trailing colon, the final name in the first list and the
5315 first name in the second list were incorrectly joined into one item (with a
5316 colon in the middle).
5322 1. Added -C and -D options to the exinext utility, mainly to make it easier
5323 to include in the automated testing, but these could be helpful when
5324 multiple configurations are in use.
5326 2. The exinext utility was not formatting the output nicely when there was
5327 an alternate port involved in the retry record key, nor when there was a
5328 message id as well (for retries that were specific to a specific message
5329 and a specific host). It was also confused by IPv6 addresses, because of
5330 the additional colons they contain. I have fixed the IPv4 problem, and
5331 patched it up to do a reasonable job for IPv6.
5333 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5334 delivery, the log line now contains "pipelined" if PIPELINING was used.
5336 4. An SMTP transport process used to panic and die if the bind() call to set
5337 an explicit outgoing interface failed. This has been changed; it is now
5338 treated in the same way as a connect() failure.
5340 5. A reference to $sender_host_name in the part of a conditional expansion
5341 that was being skipped was still causing a DNS lookup. This no longer
5344 6. The def: expansion condition was not recognizing references to header lines
5345 that used bh_ and bheader_.
5347 7. Added the _cache feature to named lists.
5349 8. The code for checking quota_filecount in the appendfile transport was
5350 allowing one more file than it should have been.
5352 9. For compatibility with Sendmail, the command line option
5360 and sets the incoming protocol and host name (for trusted callers). The
5361 host name and its colon can be omitted when only the protocol is to be set.
5362 Note the Exim already has two private options, -pd and -ps, that refer to
5363 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5364 "s", but I don't think that's a major issue.
5366 10. A number of refactoring changes to the code, none of which should affect
5369 (a) The number of logging options was getting close to filling up the
5370 32-bit word that was used as a bit map. I have split them into two classes:
5371 those that are passed in the argument to log_write(), and those that are
5372 only ever tested independently outside of that function. These are now in
5373 separate 32-bit words, so there is plenty of room for expansion again.
5374 There is no change in the user interface or the logging behaviour.
5376 (b) When building, for example, log lines, the code previously used a
5377 macro that called string_cat() twice, in order to add two strings. This is
5378 not really sufficiently general. Furthermore, there was one instance where
5379 it was actually wrong because one of the argument was used twice, and in
5380 one call a function was used. (As it happened, calling the function twice
5381 did not affect the overall behaviour.) The macro has been replaced by a
5382 function that can join an arbitrary number of extra strings onto a growing
5385 (c) The code for expansion conditions now uses a table and a binary chop
5386 instead of a serial search (which was left over from when there were very
5387 few conditions). Also, it now recognizes conditions like "pam" even when
5388 the relevant support is not compiled in: a suitably worded error message is
5389 given if an attempt is made to use such a condition.
5391 11. Added ${time_interval:xxxxx}.
5393 12. A bug was causing one of the ddress fields not to be passed back correctly
5394 from remote delivery subprocesses. The field in question was not being
5395 subsequently used, so this caused to problems in practice.
5397 13. Added new log selectors queue_time and deliver_time.
5399 14. Might have fixed a bug in maildirsizefile handling that threw up
5400 "unexpected character" debug warnings, and recalculated the data
5401 unnecessarily. In any case, I expanded the warning message to give more
5404 15. Added the message "Restricted characters in address" to the statements in
5405 the default ACL that block characters like @ and % in local parts.
5407 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5408 Three changes have been made:
5410 (a) There was a serious bug; a negative response to MAIL caused the whole
5411 recipient domain to be cached as invalid, thereby blocking all messages
5412 to all local parts at the same domain, from all senders. This bug has
5413 been fixed. The domain is no longer cached after a negative response to
5414 MAIL if the sender used is not empty.
5416 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5419 (c) A new callout option, "use_sender" has been added for people who want
5420 the modified behaviour.
5426 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5429 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5430 indeed breaks things for older releases.
5432 3. Added additional logging to the case where there is a problem reading data
5433 from a filter that is running in a subprocess using a pipe, in order to
5434 try to track down a specific problem.
5436 4. Testing facility fudge: when running in the test harness and attempting
5437 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5438 getting "No route to host". Convert this to a timeout.
5440 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5443 6. Some OS don't have socklen_t but use size_t instead. This affects the
5444 fifth argument of getsockopt() amongst other things. This is now
5445 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5446 can be set for individual OS. I have set it for SunOS5, OSF1, and
5447 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5448 some earlier ones do not.
5450 7. Change 4.30/15 was not doing the test caselessly.
5452 8. The standard form for an IPv6 address literal was being rejected by address
5453 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5454 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5455 this, as well as the form without the "IPv6" on the front (but only when
5456 address literals are enabled, of course).
5458 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5460 10. Exim crashed if a message with an empty sender address specified by -f
5461 encountered a router with an errors_to setting. This could be provoked only
5462 by a command such as
5466 where an empty string was supplied; "<>" did not hit this bug.
5468 11. Installed PCRE release 4.5.
5470 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5471 remained set. It is now erased.
5473 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5474 times from message ids (which are base 36 rather than the normal 62).
5476 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5477 were being counted as actual protocol errors, and logged if the log
5478 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5479 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5480 and DATA following a set of rejected RCPTs do not count as protocol errors.
5481 In other words, Exim assumes they were pipelined, though this may not
5482 actually be the case. Of course, in all cases the client gets an
5483 appropriate error code.
5485 15. If a lookup fails in an ACL condition, a message about the failure may
5486 be available; it is used if testing the ACL cannot continue, because most
5487 such messages specify what the cause of the deferral is. However, some
5488 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5489 that caused an old message to be retained and used if a later statement
5490 caused a defer, replacing the real cause of the deferral.
5492 16. If an IP address had so many PTR records that the DNS lookup buffer
5493 was not large enough to hold them, Exim could crash while trying to process
5494 the truncated data. It now detects and logs this case.
5496 17. Further to 4.21/58, another change has been made: if (and only if) the
5497 first line of a message (the first header line) ends with CRLF, a bare LF
5498 in a subsequent header line has a space inserted after it, so as not to
5499 terminate the header.
5501 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5502 unnecessarily, used atoi() instead of strtol(), and didn't check the
5503 termination when getting file sizes from file names by regex.
5505 19. Completely re-implemented the support for maildirsize files, in the light
5506 of a number of problems with the previous contributed implementation
5507 (4.30/29). In particular:
5509 . If the quota is zero, the maildirsize file is maintained, but no quota is
5512 . If the maildir directory does not exist, it is created before any attempt
5513 to write a maildirsize file.
5515 . The quota value in the file is just a cache; if the quota is changed in
5516 the transport, the new value overrides.
5518 . A regular expression is available for excluding directories from the
5521 20. The autoreply transport checks the characters in options that define the
5522 message's headers; it allows continued headers, but it was checking with
5523 isspace() after an embedded newline instead of explicitly looking for a
5526 21. If all the "regular" hosts to which an address was routed had passed their
5527 expiry times, and had not reached their retry times, the address was
5528 bounced, even if fallback hosts were defined. Now Exim should go on to try
5531 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5532 equivalent code in the SMTP transport. Some hosts send humungous responses
5533 to HELO/EHLO, more than 1024 it seems.
5535 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5536 gives compiler warnings in some environments. I've now done it "properly",
5539 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5540 (because of problems with the built-in one) was declared to return uschar *
5541 instead of char *, causing compiler failure.
5543 25. Fixed a file descriptor leak when processing alias/forward files.
5545 26. Fixed a minor format string issue in dbfn.c.
5547 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5549 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5550 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5553 29. When a sender address is verified, it is cached, to save repeating the test
5554 when there is more than one recipient in a message. However, when the
5555 verification involves a callout, it is possible for different callout
5556 options to be set for different recipients. It is too complicated to keep
5557 track of this in the cache, so now Exim always runs a verification when a
5558 callout is required, relying on the callout cache for the optimization.
5559 The overhead is duplication of the address routing, but this should not be
5562 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5563 to be verified with callout=postmaster, and the main callout worked but the
5564 postmaster check failed, the verification correctly failed. However, if a
5565 subsequent RCPT command asked for sender verification *without* the
5566 postmaster check, incorrect caching caused this verification also to fail,
5569 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5570 it was not caching the DNS options (qualify_single, search_parents) that
5571 were used when the lookup failed. A subsequent lookup with different
5572 options therefore always gave the same answer, though there were cases
5573 where it should not have. (Example: a "domains = !$mx_any" option on a
5574 dnslookup router: the "domains" option is always processed without any
5575 widening, but the router might have qualify_single set.) Now Exim uses the
5576 cached value only when the same options are set.
5578 32. Added John Jetmore's "exipick" utility to the distribution.
5580 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5581 than a timeout (e.g. a certificate is required, and is not provided), an
5582 Exim server now closes the connection immediately. Previously it waited for
5583 the client to close - but if the client is SSL, it seems that they each
5584 wait for each other, leading to a delay before one of them times out.
5586 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5587 maintained 0.8.x compatibility because I don't think many are using it, and
5588 it is clearly obsolete.
5590 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5593 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5594 client certificate was expired. A simple patch fixes this, though I don't
5595 understand the full logic of why the verify callback is called multiple
5598 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5599 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5600 which causes problems with some clients (such as the Certicom SSL Plus
5601 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5602 disables the coutermeasure allowing Eudora to connect."
5604 38. Exim was not checking that a write() to a log file succeeded. This could
5605 lead to Bad Things if a log got too big, in particular if it hit a file
5606 size limit. Exim now panics and dies if it cannot write to a log file, just
5607 as it does if it cannot open a log file.
5609 39. Modified OS/Makefile-Linux so that it now contains
5611 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5613 The two -D definitions ensure that Exim is compiled with large file
5614 support, which makes it possible to handle log files that are bigger than
5617 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5618 instance) a domain was checked against a named list that involved a lookup,
5619 causing $domain_data to be set, then another domain was checked against the
5620 same list, then the first domain was re-checked, the value of $domain_data
5621 after the final check could be wrong. In particular, if the second check
5622 failed, it could be set empty. This bug probably also applied to
5625 41. The strip_trailing_dot option was not being applied to the address given
5626 with the -f command-line option.
5628 42. The code for reading a message's header from the spool was incrementing
5629 $received_count, but never initializing it. This meant that the value was
5630 incorrect (doubled) while delivering a message in the same process in which
5631 it was received. In the most common configuration of Exim, this never
5632 happens - a fresh exec is done - but it can happen when
5633 deliver_drop_privilege is set.
5635 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5636 it now includes up to 150 characters of the unexpected data in the log
5639 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5640 and building data strings. The size of both of these buffers was 10 000
5641 bytes - far larger than anybody would *ever* want, thought I. Needless to
5642 say, somebody hit the limit. I have increased the maximum line length to
5643 20 000 and the maximum data length of concatenated lines to 100 000. I have
5644 also fixed two bugs, because there was no checking on these buffers. Tsk,
5645 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5646 buffer is too small.
5648 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5649 lsearch lookups. Now it does.
5651 46. When parsing a route_list item in a manualroute router, a fixed-length
5652 buffer was used for the list of hosts. I made this 1024 bytes long,
5653 thinking that nobody would ever have a list of hosts that long. Wrong.
5654 Somebody had a whole pile of complicated expansion conditions, and the
5655 string was silently truncated, leading to an expansion error. It turns out
5656 that it is easier to change to an unlimited length (owing to other changes
5657 that have happened since this code was originally written) than to build
5658 structure for giving a limitation error. The length of the item that
5659 expands into the list of hosts is now unlimited.
5661 47. The lsearch lookup could not handle data where the length of text line was
5662 more than 4095 characters. Such lines were truncated, leading to shortened
5663 data being returned. It should now handle lines of any length.
5665 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5666 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5669 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5670 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5671 no longer happens in comment lines. A list of replacements is now placed
5672 at the head of all of the source files, except those whose only change is
5673 to replace PERL_COMMAND in the very first #! line.
5675 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5676 messages on the queue, with a bottom-up merge sort, using code contributed
5677 by Michael Haardt. This should make operations like -bp somewhat faster on
5678 large queues. It won't affect queue runners, except when queue_run_in_order
5681 51. Installed eximstats 1.31 in the distribution.
5683 52. Added support for SRV lookups to the dnslookup router.
5685 53. If an ACL referred to $message_body or $message_body_end, the value was not
5686 reset for any messages that followed in the same SMTP session.
5688 54. The store-handling optimization for building very long strings was not
5689 differentiating between the different store pools. I don't think this
5690 actually made any difference in practice, but I've tidied it.
5692 55. While running the routers to verify a sender address, $sender_address
5693 was still set to the sender address. This is wrong, because when routing to
5694 send a bounce to the sender, it would be empty. Therefore, I have changed
5695 it so that, while verifying a sender address, $sender_address is set to <>.
5696 (There is no change to what happens when verifying a recipient address.)
5698 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5699 target A or AAAA records (if not already returned) without resetting the
5700 qualify_single or search_parents options of the DNS resolver. These are
5701 inappropriate in this case because the targets of MX and SRV records must
5702 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5703 target that, when qualified, matched something in the local domain. These
5704 two options are now turned off when doing these lookups.
5706 57. It seems that at least some releases of Reiserfs (which does not have the
5707 concept of a fixed number of inodes) returns zero and not -1 for the
5708 number of available inodes. This interacted badly with check_spool_inodes,
5709 which assumed that -1 was the "no such thing" setting. What I have done is
5710 to check that the total number of inodes is greater than zero before doing
5711 the test of how many are available.
5713 58. When a "warn" ACL statement has a log_message modifier, the message is
5714 remembered, and not repeated. This is to avoid a lot of repetition when a
5715 message has many recipients that cause the same warning to be written.
5716 However, Exim was preserving the list of already written lines for an
5717 entire SMTP session, which doesn't seem right. The memory is now reset if a
5718 new message is started.
5720 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5721 debugging output unless log_rewrite was also set.
5723 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5724 of (int)(handle) when we know that handle contains (void *)(-1).
5726 61. The Exim daemon panic-logs an error return when it closes the incoming
5727 connection. However "connection reset by peer" seems to be common, and
5728 isn't really an error worthy of noting specially, so that particular error
5731 62. When Exim is trying to find all the local interfaces, it used to panic and
5732 die if the ioctl to get the interface flags failed. However, it seems that
5733 on at least one OS (Solaris 9) it is possible to have an interface that is
5734 included in the list of interfaces, but for which you get a failure error
5735 for this call. This happens when the interface is not "plumbed" into a
5736 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5737 failure of the "get flags" call assumes that the interface is down.
5739 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5740 makes life easier for people who are doing arithmetic on fields extracted
5741 from dates, where you often get leading zeros that should not be
5742 interpreted as octal.
5744 64. Added qualify_domain to the redirect router, to override the global
5747 65. If a pathologically long header line contained very many addresses (the
5748 report of this problem mentioned 10 000) and each of them was rewritten,
5749 Exim could use up a very large amount of memory. (It kept on making new
5750 copies of the header line as it rewrote, and never released the old ones.)
5751 At the expense of a bit more processing, the header rewriting function has
5752 been changed so that it no longer eats memory in this way.
5754 66. The generation of the Received: header has been moved from the time that a
5755 message starts to be received, to the time that it finishes. The timestamp
5756 in the Received: header should now be very close to that of the <= log
5757 line. There are two side-effects of this change:
5759 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5760 logged header lines no longer include the local Received: line, because
5761 it has not yet been created. The same applies to a copy of the message
5762 that is returned to a non-SMTP sender when a message is rejected.
5764 (b) When a filter file is tested using -bf, no additional Received: header
5765 is added to the test message. After some thought, I decided that this
5768 This change does not affect the value of $received_for. It is still set
5769 after address rewriting, but before local_scan() is called.
5771 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5773 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5774 gave an unhelpful panic error message, and a defer error. I have managed to
5775 change this behaviour so that it now rejects any supplied certificate,
5776 which seems right, as the list of acceptable certificates is empty.
5778 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5779 gave an unhelpful defer error. I have not managed to make this reject any
5780 supplied certificates, but the error message it gives is "no certificate
5781 supplied", which is not helpful.
5783 70. exigrep's output now also includes lines that are not associated with any
5784 message, but which match the given pattern. Implemented by a patch from
5785 Martin Sluka, which also tidied up the Perl a bit.
5787 71. Recipient callout verification, like sender verification, was using <> in
5788 the MAIL FROM command. This isn't really the right thing, since the actual
5789 sender may affect whether the remote host accepts the recipient or not. I
5790 have changed it to use the actual sender in the callout; this means that
5791 the cache record is now keyed on a recipient/sender pair, not just the
5792 recipient address. There doesn't seem to be a real danger of callout loops,
5793 since a callout by the remote host to check the sender would use <>.
5794 [SEE ABOVE: changed after hitting problems.]
5796 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5797 temporary errors. However, in the case of such a code being given after
5798 the end of a data transmission (i.e. after ".") Exim was failing to write
5799 a retry record for the message. (Yes, there was some broken host that was
5800 actually sending 8xx at this point.)
5802 73. An unknown lookup type in a host list could cause Exim to panic-die when
5803 the list was checked. (An example that provoked this was putting <; in the
5804 middle of a list instead of at the start.) If this happened during a DATA
5805 ACL check, a -D file could be left lying around. This kind of configuration
5806 error no longer causes Exim to die; instead it causes a defer error. The
5807 incident is still logged to the main and panic logs.
5809 74. Buglet left over from Exim 3 conversion. The message "too many messages
5810 in one connection" was written to the rejectlog but not the mainlog, except
5811 when address rewriting (yes!) was being logged.
5813 75. Added write_rejectlog option.
5815 76. When a system filter was run not as root (that is, when system_filter_user
5816 was set), the values of the $n variables were not being returned to the
5817 main process; thus, they were not subsequently available in the $sn
5820 77. Added +return_path_on_delivery log selector.
5822 78. A connection timeout was being treated differently from recipients deferred
5823 when testing hosts_max_try with a message that was older than the host's
5824 retry timeout. (The host should not be counted, thus allowing all hosts to
5825 be tried at least once before bouncing.) This may have been the cause of an
5826 occasionally reported bug whereby a message would remain on the queue
5827 longer than the retry timeout, but would be bounced if a delivery was
5828 forced. I say "may" because I never totally pinned down the problem;
5829 setting up timeout/retry tests is difficult. See also the next item.
5831 79. The ultimate address timeout was not being applied to errors that involved
5832 a combination of host plus message (for example, a timeout on a MAIL
5833 command). When an address resolved to a number of possible hosts, and they
5834 were not all tried for each delivery (e.g. because of hosts_max_try), a
5835 message could remain on the queue longer than the retry timeout.
5837 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5840 81. Fixed an obscure SMTP outgoing bug which required at least the following
5841 conditions: (a) there was another message waiting for the same server;
5842 (b) the server returned 5xx to all RCPT commands in the first message so
5843 that the message was not completed; (c) the server dropped the connection
5844 or gave a negative response to the RSET that Exim sends to abort the
5845 transaction. The observed case was a dropped connection after DATA that had
5846 been sent in pipelining mode. That is, the server had advertised PIPELINING
5847 but was not implementing it correctly. The effect of the bug was incorrect
5848 behaviour, such as trying another host, and this could lead to a crash.
5854 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5855 and daemon.c were passed as pointers to ints; they should have been
5856 pointers to socklen_t variables (which are typically unsigned ints).
5858 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5861 3. Fixed a really odd bug that affected only the testing scheme; patching a
5862 certain fixed string in the binary changed the value of another string that
5863 happened to be identical to the end of the original first string.
5865 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5866 name", it returns that address as the IP address. On some operating
5867 systems (e.g. Solaris), it also passes back the IP address string as the
5868 "host name". However, on others (e.g. Linux), it passes back an empty
5869 string. Exim wasn't checking for this, and was changing the host name to an
5870 empty string, assuming it had been canonicalized.
5872 5. Although rare, it is permitted to have more than one PTR record for a given
5873 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5874 all the names associated with an address, because they do in Solaris.
5875 However, it seems that they do not in Linux for data that comes from the
5876 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5877 I found this out when I moved to a new Linux workstation and tried to run
5878 the Exim test suite.
5880 To get round this problem I have changed the code so that it now does its
5881 own call to the DNS to look up PTR records when searching for a host name.
5882 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5883 addresses that are only in /etc/hosts are still found.
5885 This behaviour is, however, controlled by an option called host_lookup_
5886 order, which defaults to "bydns:byaddr". If people want to use the other
5887 order, or indeed, just use one or the other means of lookup, they can
5888 specify it in this variable.
5890 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5891 some operating systems, this comes back from gethostbyaddr() as an empty
5892 string, and this is what Exim used to test for. However, it seems that in
5893 other systems, "." is yielded. Exim now tests for this case too.
5895 7. The values of check_spool_space and check_log_space are now held internally
5896 as a number of kilobytes instead of an absolute number of bytes. If a
5897 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5898 kilobyte. This means that much larger values can be stored.
5900 8. Exim monitor: an attempt to get the action menu when not actually pointing
5901 at a message produces an empty menu entitled "No message selected". This
5902 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5903 no entries in it ("Shell widget menu has zero width and/or height"). So I
5904 have added a single, blank menu entry in this case.
5906 9. Added ${quote_local_part.
5908 10. MIME decoding is now applied to the contents of Subject: header lines when
5911 11. Now that a reference to $sender_host_address automatically causes a reverse
5912 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5913 host lookup before query-style lookups in lists that might use this
5914 variable. This has therefore been abolished, and the "net-" prefix is no
5915 longer necessary for query-style lookups.
5917 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5918 have been a typo for LFLAGS, so it has been changed.
5920 13. The install script calls Exim with "-C /dev/null" in order to find the
5921 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5922 to be output. However, since Exim outputs its version number before the
5923 error, it didn't break the script. It just looked ugly. I fixed this by
5924 always allowing "-C /dev/null" if the caller is root.
5926 14. Ignore overlarge ACL variable number when reading spool file - insurance
5927 against a later release with more variables having written the file.
5929 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5930 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5931 this, as well as the form without the "IPv6" on the front.
5933 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5934 OS/Makefile-Darwin file.
5936 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5937 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5939 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5940 variable. However, some OS use ints for inodes. I've added cast to long int
5941 to get rid of the compiler warning.
5943 19. I had forgotten to lock out "/../" in configuration file names when
5944 ALT_CONFIG_PREFIX was set.
5946 20. Routers used for verification do not need to specify transports. However,
5947 if such a router generated a host list, and callout was configured, Exim
5948 crashed, because it could not find a port number from the (non-existent)
5949 transport. It now assumes port 25 in this circumstance.
5951 21. Added the -t option to exigrep.
5953 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5954 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5955 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5956 them is set, LOOKUP_LSEARCH is forced.
5958 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5960 24. Added sender and host information to the "rejected by local_scan()" log
5961 line; previously there was no indication of these.
5963 25. Added .include_if_exists.
5965 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5966 Linux. It turns out that not all file systems support this. Apparently some
5967 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5968 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5969 not supported on the file descriptor, is now ignored when Exim is trying to
5970 sync a directory. This applies only to Linux.
5972 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5974 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5975 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5978 29. Added support for maildirsize files from supplied patch (modified a bit).
5980 30. The use of :fail: followed by an empty string could lead Exim to respond to
5981 sender verification failures with (e.g.):
5983 550 Verification failed for <xxx>
5984 550 Sender verify failed
5986 where the first response line was missing the '-' that indicates it is not
5987 the final line of the response.
5989 31. The loop for finding the name of the user that called Exim had a hardwired
5990 limit of 10; it now uses the value of finduser_retries, which is used for
5991 all other user lookups.
5993 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5996 33. Exim was neglecting to zero errno before one call of strtol() when
5997 expanding a string and expecting an integer value. On some systems this
5998 resulted in spurious "integer overflow" errors. Also, it was casting the
5999 result into an int without checking.
6001 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6002 did not work. The code looks as if it has *never* worked, though it appears
6003 to have been documented since at least release 1.62. I have made it work.
6005 35. The "timeout_DNS" error in retry rules, also documented since at least
6006 1.62, also never worked. As it isn't clear exactly what this means, and
6007 clearly it isn't a major issue, I have abolished the feature by treating it
6008 as "timeout", and writing a warning to the main and panic logs.
6010 36. The display of retry rules for -brt wasn't always showing the error code
6013 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6014 timeout_connect_A, timeout_connect_MX.
6016 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6017 to the empty sender.
6019 39. The daemon was not analysing the content of -oX till after it had closed
6020 stderr and disconnected from the controlling terminal. This meant that any
6021 syntax errors were only noted on the panic log, and the return code from
6022 the command was 0. By re-arranging the code a little, I've made the
6023 decoding happen first, so such errors now appear on stderr, and the return
6024 code is 1. However, the actual setting up of the sockets still happens in
6025 the disconnected process, so errors there are still only recorded on the
6028 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6029 connections (as happens on some IP stacks) was logged at start up time as
6030 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6031 it from "IPv6 and IPv4", which means that two separate sockets are being
6034 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6035 says whether AF_INET or AF_INET6 was passed as an argument.
6037 42. Exiwhat output was messed up when time zones were included in log
6040 43. Exiwhat now gives more information about the daemon's listening ports,
6041 and whether -tls-on-connect was used.
6043 44. The "port" option of the smtp transport is now expanded.
6045 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6046 silently ignored. Now an error message is written to the main and panic
6049 46. There's a new ACL modifier called "logwrite" which writes to a log file
6050 as soon as it is encountered.
6052 47. Added $local_user_uid and $local_user_gid at routing time.
6054 48. Exim crashed when trying to verify a sender address that was being
6057 49. Exim was recognizing only a space character after ".include". It now also
6058 recognizes a tab character.
6060 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6061 extracting the relevant information from the specification. The man page no
6062 longer contains scrambled data for the -d option, and I've added a section
6063 at the front about calling Exim under different names.
6065 51. Added "extra_headers" argument to the "mail" command in filter files.
6067 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6070 53. Installed eximstats 1.29.
6072 54. Added transport_filter_timeout as a generic transport option.
6074 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6075 Cc: header lines. This was required by RFC 822, but it not required by RFC
6078 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6079 incoming messages that did not have them. Now it does so only if the
6080 message originates locally, that is, if there is no associated remote host
6081 address. When Resent- header lines are present, this applies to the Resent-
6082 lines rather than the non-Resent- lines.
6084 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6085 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6087 58. Messages for configuration errors now include the name of the main
6088 configuration file - useful now that there may be more than one file in a
6089 list (.included file names were always shown).
6091 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6092 for those rare installations that do not start the daemon as root or run it
6093 setuid root. I've cut out the call to initgroups() if the daemon is not
6096 60. The Exim user and group can now be bound into the binary as text strings
6097 that are looked up at the start of Exim's processing.
6099 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6101 62. Added $mailstore_basename variable.
6103 63. Installed patch to sieve.c from Michael Haardt.
6105 64. When Exim failed to open the panic log after failing to open the main log,
6106 the original message it was trying to log was written to stderr and debug
6107 output, but if they were not available (the usual case in production), it
6108 was lost. Now it is written to syslog before the two lines that record the
6109 failures to open the logs.
6111 65. Users' Exim filters run in subprocesses under the user's uid. It is
6112 possible for a "deliver" command or an alias in a "personal" command to
6113 provoke an address rewrite. If logging of address rewriting is configured,
6114 this fails because the process is not running as root or exim. There may be
6115 a better way of dealing with this, but for the moment (because 4.30 needs
6116 to be released), I have disabled address rewrite logging when running a
6117 filter in a non-root, non-exim process.
6123 1. The buildconfig auxiliary program wasn't quoting the value set for
6124 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6125 not defined. This bug was masked in 4.22 by the effect that was fixed in
6128 2. Some messages that were rejected after a message id was allocated were
6129 shown as "incomplete" by exigrep. It no longer does this for messages that
6130 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6132 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6133 have allow_domain_literals set, the ID did not get logged in the <= line.
6134 Domain literals are now always recognized in Message-ID: header lines.
6136 4. The first argument for a ${extract expansion item is the key name or field
6137 number. Leading and trailing spaces in this item were not being ignored,
6138 causing some misleading effects.
6140 5. When deliver_drop_privilege was set, single queue runner processes started
6141 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6142 same command in the process it spins off) were not dropping privilege.
6144 6. When the daemon running as "exim" started a queue runner, it always
6145 re-executed Exim in the spun-off process. This is a waste of effort when
6146 deliver_drop_privilege is set. The new process now just calls the
6147 queue-runner function directly.
6153 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6156 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6157 ignored. Though the use of -oP was forcing the writing of a pid file, it
6158 was always written to the default place.
6160 3. If the message "no IP address found for host xxxx" is generated during
6161 incoming verification, it is now followed by identification of the incoming
6162 connection (so you can more easily find what provoked it).
6164 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6166 5. Added some features to "harden" Exim a bit more against certain attacks:
6168 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6169 be put in Local/Makefile. This is like the never_users runtime option,
6170 but it cannot be overridden. The default setting is "root".
6172 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6173 prefix string with which any file named in a -C command line option
6176 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6177 is retained for -C and -D only if the caller of Exim is root. Without
6178 it, the exim user may also use -C and -D and retain privilege.
6180 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6181 command line option is disabled.
6183 6. Macro names set by the -D option must start with an upper case letter, just
6184 like macro names defined in the configuration file.
6186 7. Added "dereference=" facility to LDAP.
6188 8. Two instances of the typo "uknown" in the source files are fixed.
6190 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6191 the Configure-Makefile script screwed up while processing it.
6193 10. Incorporated PCRE 4.4.
6195 11. The SMTP synchronization check was not operating right at the start of an
6196 SMTP session. For example, it could not catch a HELO sent before the client
6197 waited for the greeting. There is now a check for outstanding input at the
6198 point when the greeting is written. Because of the duplex, asynchronous
6199 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6200 way, but not yet received, when the check is performed.
6202 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6203 on TCP/IP sockets, because this apparently causes some broken clients to
6206 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6207 unchanged) from the Cygwin maintainer.
6209 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6210 was supported instead of testing for mbx. Effectively a typo.
6212 15. The spa authenticator server code was not checking that the input it
6213 received was valid base64.
6215 16. The debug output line for the "set" modifier in ACLs was not showing the
6216 name of the variable that was being set.
6218 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6220 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6221 lookup on its own. Something else was needed to trigger the lookup. For
6222 example, a match in host_lookup or the need for a host name in a host list.
6223 Now, if $sender_host_name is referenced and the host name has not yet been
6224 looked up, a lookup is performed. If the lookup fails, the variable remains
6225 empty, and $host_lookup_failed is set to "1".
6227 19. Added "eqi" as a case-independent comparison operator.
6229 20. The saslauthd authentication condition could segfault if neither service
6230 nor realm was specified.
6232 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6233 error message that was logged was misleading, and incoming SMTP
6234 connections were dropped. The message is now more accurate, and temporary
6235 errors are given to SMTP connections.
6237 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6238 (except RSET) with a 421 error, until QUIT is received. However, it was
6239 failing to send a response to QUIT.
6241 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6242 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6243 ACL is now run after the helo_try_verify_hosts code.
6245 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6246 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6247 case-independent, so other case variants are also recognized). Apparently
6248 some systems use these upper case variants.
6250 25. If more than two messages were waiting for the same host, and a transport
6251 filter was specified for the transport, Exim sent two messages over the
6252 same TCP/IP connection, and then failed with "socket operation on non-
6253 socket" when it tried to send the third.
6255 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6257 27. The extern definition of crypt16() in expand.c was not being excluded when
6258 the OS had its own crypt16() function.
6260 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6261 as a preferred synonym for return_size_limit, both as an option and as an
6264 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6266 30. Changed the default configuration ACL to relax the local part checking rule
6267 for addresses that are not in any local domains. For these addresses,
6268 slashes and pipe symbols are allowed within local parts, but the sequence
6269 /../ is explicitly forbidden.
6271 31. SPA server authentication was not clearing the challenge buffer before
6274 32. log_message in a "warn" ACL statement was writing to the reject log as
6275 well as to the main log, which contradicts the documentation and doesn't
6276 seem right (because no rejection is happening). So I have stopped it.
6278 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6279 However, I am unable to do any testing of this.
6281 34. Fixed an infelicity in the appendfile transport. When checking directories
6282 for a mailbox, to see if any needed to be created, it was accidentally
6283 using path names with one or more superfluous leading slashes; tracing
6284 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6286 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6287 contents are added to the log line that is written for every discarded
6288 recipient. (Previously a log_message setting was ignored.)
6290 36. The ${quote: operator now quotes the string if it is empty.
6292 37. The install script runs exim in order to find its version number. If for
6293 some reason other than non-existence or emptiness, which it checks, it
6294 could not run './exim', it was installing it with an empty version number,
6295 i.e. as "exim-". This error state is now caught, and the installation is
6298 38. An argument was missing from the function that creates an error message
6299 when Exim fails to connect to the socket for saslauthd authentication.
6300 This could cause Exim to crash, or give a corrupted message.
6302 39. Added isip, isip4, and isip6 to ${if conditions.
6304 40. The ACL variables $acl_xx are now saved with the message, and can be
6305 accessed later in routers, transports, and filters.
6307 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6308 strings in the file are not string-expanded.
6310 42. If a MAIL command specified a SIZE value that was too large to fit into an
6311 int variable, the check against message_size_limit failed. Such values are
6312 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6313 day this will have to be increased, but I don't think I want to be around
6314 when emails are that large.
6321 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6322 iconv() is not standard in FreeBSD.
6324 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6325 IPv6 enabled. The observed symptom was a segmentation fault on return from
6326 the function os_common_find_running_interfaces() in src/os.c.
6328 3. In the check_special_case() function in daemon.c I had used "errno" as an
6329 argument name, which causes warnings on some systems. This was basically a
6330 typo, since it was named "eno" in the comments!
6332 4. The code that waits for the clock to tick (at a resolution of some fraction
6333 of a second) so as to ensure message-id uniqueness was always waiting for
6334 at least one whole tick, when it could have waited for less. [This is
6335 almost certainly not relevant at current processor speeds, where it is
6336 unlikely to ever wait at all. But we try to future-proof.]
6338 5. The function that sleeps for a time interval that includes fractions of a
6339 second contained a race. It did not block SIGALRM between setting the
6340 timer, and suspending (a couple of lines later). If the interval was short
6341 and the sigsuspend() was delayed until after it had expired, the suspension
6342 never ended. On busy systems this could lead to processes getting stuck for
6345 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6346 process, before it forks any delivery processes. The open lookup caching
6347 mechanism meant that the open file or database connection was passed into
6348 the delivery process. The problem was that delivery processes always tidy
6349 up cached lookup data. This could cause a problem for the next delivery
6350 process started by the queue runner, because the external queue runner
6351 process does not know about the closure. So the next delivery process
6352 still has data in the lookup cache. In the case of a file lookup, there was
6353 no problem because closing a file descriptor in a subprocess doesn't affect
6354 the parent. However, if the lookup was caching a connection to a database,
6355 the connection was closed, and the second delivery process was likely to
6356 see errors such as "PGSQL: query failed: server closed the connection
6357 unexpectedly". The problem has been fixed by closing all cached lookups
6358 in a queue runner before running a delivery process.
6360 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6361 seem to have the "const" qualifier which it has on other OS. I've
6364 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6365 *of the same type* (client or server) with the same public name that an
6366 error should be diagnosed.
6368 9. When Exim looked up a host name for an IP address, but failed to find the
6369 original IP address when looking up the host name (a safety check), it
6370 output the message "<ip address> does not match any IP for NULL", which was
6371 confusing, to say the least. The bug was that the host name should have
6372 appeared instead of "NULL".
6374 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6375 user that is built into the binary, and the -C or -D options is used, root
6376 privilege is dropped before the configuration file is read. In addition,
6377 logging is switched to stderr instead of the normal log files. If the
6378 configuration then re-defines the Exim user, the unprivileged environment
6379 is probably not what is expected, so Exim logs a panic warning message (but
6382 However, if deliver_drop_privilege is set, the unprivileged state may well
6383 be exactly what is intended, so the warning has been cut out in that case,
6384 and Exim is allowed to try to write to its normal log files.
6390 1. smtp_return_error_details was not giving details for temporary sender
6391 or receiver verification errors.
6393 2. Diagnose a configuration error if two authenticators have the same public
6396 3. Exim used not to create the message log file for a message until the first
6397 delivery attempt. This could be confusing when incoming messages were held
6398 for policy or load reasons. The message log file is now created at the time
6399 the message is received, and an initial "Received" line is written to it.
6401 4. The automatically generated man page for command line options had a minor
6402 bug that caused no ill effects; however, a more serious problem was that
6403 the procedure for building the man page automatically didn't always
6404 operate. Consequently, release 4.20 contains an out-of-date version. This
6405 shouldn't happen again.
6407 5. When building Exim with embedded Perl support, the script that builds the
6408 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6409 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6411 6. The freeze_tell option was not being used for messages that were frozen on
6412 arrival, either by an ACL or by local_scan().
6414 7. Added the smtp_incomplete_transaction log selector.
6416 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6417 was accepting AUTH without a new EHLO.
6419 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6420 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6423 10. Logging of TCP/IP connections (when configured) now happens in the main
6424 daemon process instead of the child process, so that the TCP/IP connection
6425 count is more accurate (but it can never be perfect).
6427 11. The use of "drop" in a nested ACL was not being handled correctly in the
6428 outer ACL. Now, if condition failure induced by the nested "drop" causes
6429 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6430 or "require"), the connection is dropped.
6432 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6433 that yield "discard" can now be used with an "accept" or a "discard" verb,
6434 but an error is generated for any others (because I can't see a useful way
6435 to define what should happen).
6437 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6438 are now processed in the same way as lines in the Exim configuration file.
6439 In particular, continuation lines are supported.
6441 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6443 15. Added -ti meaning -t -i.
6445 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6446 domains, and warn by logging if others are found.
6448 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6449 returned from GIFCONF when Exim is trying to find the list of interfaces on
6450 a host. The code in os.c has been modified to copy each ifreq to an aligned
6451 structure in all cases.
6453 Also, in some cases, the returned ifreq's were being copied to a 'struct
6454 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6455 means the last couple of bytes of an IPv6 address could be chopped if the
6456 ifreq contained only a normal sockaddr (14 bytes storage).
6458 18. Named domain lists were not supported in the hosts_treat_as_local option.
6459 An entry such as +xxxx was not recognized, and was treated as a literal
6462 19. Ensure that header lines added by a DATA ACL are included in the reject log
6463 if the ACL subsequently rejects the message.
6465 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6466 MD5 (which is deprecated).
6468 21. When testing a filter file using -bf, Exim was writing a message when it
6469 took the sender from a "From " line in the message, but it was not doing so
6470 when it took $return_path from a Return-Path: header line. It now does.
6472 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6473 with a valid header line field name (a series of printing characters
6474 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6476 23. Changed "disc" in the source to "disk" to conform to the documentation and
6477 the book and for uniformity.
6479 24. Ignore Sendmail's -Ooption=value command line item.
6481 25. When execve() failed while trying to run a command in a pipe transport,
6482 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6483 could be confused with a return value of 69 from the command itself. This
6484 has been changed to 127, the value the shell returns if it is asked to run
6485 a non-existent command. The wording for the related log line suggests a
6486 non-existent command as the problem.
6488 26. If received_header_text expands to an empty string, do not add a Received:
6489 header line to the message. (Well, it adds a token one on the spool, but
6490 marks it "old" so that it doesn't get used or transmitted.)
6492 27. Installed eximstats 1.28 (addition of -nt option).
6494 28. There was no check for failure on the call to getsockname() in the daemon
6495 code. This can fail if there is a shortage of resources on the system, with
6496 ENOMEM, for example. A temporary error is now given on failure.
6498 29. Contrary to the C standard, it seems that in some environments, the
6499 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6500 program. Exim now does this explicitly; it affects the formatting of
6501 timestamps using strftime().
6503 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6504 complaints. I've now initialized all the variables, to avoid this.
6506 32. Header lines added by a system filter were not being "seen" during
6507 transport-time rewrites.
6509 33. The info_callback() function passed to OpenSSL is set up with type void
6510 (*)(SSL *, int, int), as described somewhere. However, when calling the
6511 function (actually a macro) that sets it up, the type void(*)() is
6512 expected. I've put in a cast to prevent warnings from picky compilers.
6514 34. If a DNS black list lookup found a CNAME record, but there were no A
6515 records associated with the domain it pointed at, Exim crashed.
6517 35. If a DNS black list lookup returned more than one A record, Exim ignored
6518 all but the first. It now scans all returned addresses if a particular IP
6519 value is being sought. In this situation, the contents of the
6520 $dnslist_value variable are a list of all the addresses, separated by a
6523 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6524 to accept a host name and all its aliases if the forward lookup for any of
6525 them yielded the IP address of the incoming connection. Now it accepts only
6526 those names whose forward lookup yields the correct IP address. Any other
6527 names are discarded. This closes a loophole whereby a rogue DNS
6528 administrator could create reverse DNS records to break through a
6529 wildcarded host restriction in an ACL.
6531 37. If a user filter or a system filter that ran in a subprocess used any of
6532 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6533 the wrong values were passed to the pipe command ($thisaddress had the
6534 value of $0, $0 had the value of $1, etc). This bug was introduced by
6535 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6537 38. Improved the line breaking for long SMTP error messages from ACLs.
6538 Previously, if there was no break point between 40 and 75 characters, Exim
6539 left the rest of the message alone. Two changes have been made: (a) I've
6540 reduced the minimum length to 35 characters; (b) if it can't find a break
6541 point between 35 and 75 characters, it looks ahead and uses the first one
6542 that it finds. This may give the occasional overlong line, but at least the
6543 remaining text gets split now.
6545 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6546 file descriptors might be low, and that setting 1000 would always raise it.
6547 It turns out that in some environments, the limit is already over 1000 and
6548 that lowering it causes trouble. So now Exim takes care not to decrease it.
6550 40. When delivering a message, the value of $return_path is set to $sender_
6551 address at the start of routing (routers may change the value). By an
6552 oversight, this default was not being set up when an address was tested by
6553 -bt or -bv, which affected the outcome if any router or filter referred to
6556 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6557 log only when "message" or "log_message" are set. However, if one of the
6558 conditions was an address verification, or a call to a nested ACL, the
6559 messages generated by the underlying test were being passed through. This
6560 no longer happens. The underlying message is available in $acl_verify_
6561 message for both "message" and "log_message" expansions, so it can be
6562 passed through if needed.
6564 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6565 new expansion $bh_ to give the encoded byte string without charset
6566 translation. Translation happens only if iconv() is available; HAVE_ICONV
6567 indicates this at build time. HEADERS_CHARSET gives the charset to
6568 translate to; headers_charset can change it in the configuration, and
6569 "headers charset" can change it in an individual filter file.
6571 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6572 that creates RFC 2047 encoded "words" labels them as that charset instead
6573 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6574 expansion operator; (ii) when Exim creates a From: line for a local
6575 message; (iii) when a header line is rewritten to include a "phrase" part.
6577 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6578 buggy, causing it to skip the first lines of messages whose message ID
6579 ended in 'D'. This would not have bitten before Exim release 4.14, because
6580 message IDs were unlikely to end in 'D' before then. The effect was to have
6581 incorrect size information for certain domains.
6583 45. #include "config.h" was missing at the start of the crypt16.c module. This
6584 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6587 46. If there was a timeout during a "random" callout check, Exim treated it as
6588 a failure of the random address, and carried on sending RSET and the real
6589 address. If the delay was just some slowness somewhere, the response to the
6590 original RCPT would be taken as a response to RSET and so on, causing
6591 mayhem of various kinds.
6593 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6594 when I implemented it. It didn't allow for the fact that some option values
6595 may legitimately be negative (e.g. size_addition), and it didn't even do
6596 the right test for positive values.
6598 48. Domain names in DNS records are case-independent. Exim always looks them up
6599 in lower case. Some resolvers return domain names in exactly the case they
6600 appear in the zone file, that is, they may contain uppercase letters. Not
6601 all resolvers do this - some return always lower case. Exim was treating a
6602 change of case by a resolver as a change of domain, similar to a widening
6603 of a domain abbreviation. This triggered its re-routing code and so it was
6604 trying to route what was effectively the same domain again. This normally
6605 caused routing to fail (because the router wouldn't handle the domain
6606 twice). Now Exim checks for this case specially, and just changes the
6607 casing of the domain that it ultimately uses when it transmits the message
6610 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6613 50. If a filter generated a file delivery with a non-absolute name (possible if
6614 no home directory exists for the router), the forbid_file option was not
6617 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6618 the existing equality matching.
6620 52. Exim was using ints instead of ino_t variables in some places where it was
6621 dealing with inode numbers.
6623 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6624 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6625 called TMPDIR, and if it finds it is different, it changes its value.
6627 54. The smtp_printf() function is now made available to local_scan() so
6628 additional output lines can be written before returning. There is also an
6629 smtp_fflush() function to enable the detection of a dropped connection.
6630 The variables smtp_input and smtp_batched_input are exported to
6633 55. Changed the default runtime configuration: the message "Unknown user"
6634 has been removed from the ACL, and instead placed on the localuser router,
6635 using the cannot_route_message feature. This means that any verification
6636 failures that generate their own messages won't get overridden. Similarly,
6637 the "Unrouteable address" message that was in the ACL for unverifiable
6638 relay addresses has also been removed.
6640 56. Added hosts_avoid_esmtp to the smtp transport.
6642 57. The exicyclog script was not checking for the esoteric option
6643 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6644 will work only if exicyclog is run under the appropriate euid.
6646 58. Following a discussion on the list, the rules by which Exim recognises line
6647 endings on incoming messages have been changed. The -dropcr and drop_cr
6648 options are now no-ops, retained only for backwards compatibility. The
6649 following line terminators are recognized: LF CRLF CR. However, special
6650 processing applies to CR:
6652 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6653 nor a local message in the state where . is a terminator.
6655 (ii) If a bare CR is encountered in a header line, an extra space is added
6656 after the line terminator so as not to end the header. The reasoning
6657 behind this is that bare CRs in header lines are most likely either
6658 to be mistakes, or people trying to play silly games.
6660 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6661 was being incorrectly given as 18 bytes larger than it should have been.
6662 This is a VOB (very old bug).
6664 60. This may never have affected anything current, but just in case it has:
6665 When the local host is found other than at the start of a list of hosts,
6666 the local host, those with the same MX, and any that follow, are discarded.
6667 When the list in question was part of a longer list of hosts, the following
6668 hosts (not currently being processed) were also being discarded. This no
6669 longer happens. I'm not sure if this situation could ever has previously
6672 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6675 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6676 header. This is something that is recommended in a new Internet Draft, and
6677 is something that is documented as being done by Sendmail. There are two
6678 possible values. For messages generated by the autoreply transport, Exim
6681 Auto-Submitted: auto-replied
6683 whereas for all other generated messages (e.g. bounces) it adds
6685 Auto-Submitted: auto-generated
6687 63. The "personal" condition in filters now includes a test for the
6688 Auto-Submitted: header. If it contains the string "auto-" the message it
6689 not considered personal.
6691 64. Added rcpt_include_affixes as a generic transport option.
6693 65. Added queue_only_override (default true).
6695 66. Added the syslog_duplication option.
6697 67. If what should have been the first header line of a message consisted of
6698 a space followed by a colon, Exim was mis-interpreting it as a header line.
6699 It isn't of course - it is syntactically invalid and should therefore be
6700 treated as the start of the message body. The misbehaviour could have
6701 caused a number of strange effects, including loss of data in subsequent
6702 header lines, and spool format errors.
6704 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6705 client host had authenticated. This control can now be exercised by an ACL
6706 for more flexibility.
6708 69. By default, callouts do not happen when testing with -bh. There is now a
6709 variant, -bhc, which does actually run the callout code, including
6710 consulting and updating the callout cache.
6712 70. Added support for saslauthd authentication, courtesy of Alexander
6715 71. If statvfs() failed on the spool or log directories while checking their
6716 size for availability, Exim confusingly gave the error "space shortage".
6717 Furthermore, in debugging mode it crashed with a floating point exception.
6718 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6719 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6720 serious problem, Exim now writes to the main and panic logs when this
6721 happens, with details of the failure. It then refuses to accept the
6722 incoming message, giving the message "spool directory problem" or "log
6723 directory problem" with a 421 code for SMTP messages.
6725 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6726 0, 1, and 2 exist, because some OS complain for execs without them (see
6727 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6728 descriptors. However, the code omitted to check that the open succeeded,
6729 causing mysterious errors if for some reason the permissions on /dev/null
6730 got screwed. Now Exim writes a message to the main and panic logs, and
6731 bombs out if it can't open /dev/null.
6733 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6734 interact so that it is all more flexible. It is supposed to remain
6735 backwards compatible. Also added extra_local_interfaces.
6737 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6738 to bomb out with an assertion failure - to the client this appears as a
6739 connection drop. This problem occurs in the part of the code that was taken
6740 from the Samba project. Fortunately, the assertion is in a very simple
6741 function, so I have fixed this by reproducing the function inline in the
6742 one place where it is called, and arranging for authentication to fail
6743 instead of killing the process with assert().
6745 75. The SPA client code was not working when the server requested OEM rather
6746 than Unicode encoding.
6748 76. Added code to make require_files with a specific uid setting more usable in
6749 the case where statting the file as root fails - usually a non-root-mounted
6750 NFS file system. When this happens and the failure is EACCES, Exim now
6751 forks a subprocess and does the per-uid checking as the relevant uid.
6753 77. Added process_log_path.
6755 78. If log_file_path was not explicitly set, a setting of check_log_space or
6756 check_log_inodes was ignored.
6758 79. If a space check for the spool or log partitions fails, the incident is now
6759 logged. Of course, in the latter case the data may get lost...
6761 80. Added the %p formatting code to string_format() so that it can be used to
6762 print addresses in debug_print(). Adjusted all the address printing in the
6763 debugging in store.c to use %p rather than %d.
6765 81. There was a concern that a line of code in smtp_in.c could overflow a
6766 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6767 initially expressed, the concern was not well-founded, because trailing
6768 spaces are removed early. However, if the trailing spaces were followed by
6769 a NULL, they did not get removed, so the overflow was possible. Two fixes
6772 (a) I re-wrote the offending code in a cleaner fashion.
6773 (b) If an incoming SMTP command contains a NULL character, it is rejected
6776 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6777 runs initgroups(), so that if the Exim user is in any additional groups,
6778 they will be used during message reception.
6784 The change log for 4.20 and earlier releases has been archived.